JPH0720132Y2 - Winding machine for welding cable - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding cable winder for winding a welding cable that supplies a high current required for welding an arc or the like .

[0002]

[Technical background] About 70 A to 250 A for welding arcs, etc.
When a welding operation is performed in a state that requires a high current of 1 degree , draws out the required amount of welding cable, and leaves excess welding cable in the winder (rolling), the winder is affected by extremely high amperage. It is generally accepted that the welding cable portion that is wound in multiple layers is heated and the rubber layer that covers it melts, causing a risk of electrical leakage. For this reason, conventionally, the welding cable is currently pulled out over the entire length in order to utilize natural cooling, regardless of the distance between the welding location and the welding operation. In this case, a welding cable having a length of several tens of meters must be unnecessarily pulled out and wound up, which makes the welding work and the post-processing work after the work troublesome, and complicates the workability.

[0003]

[Problems to be Solved by the Invention] By the way, although it is not a winder for welding cables such as arcs, it is a power cord for electric tools.
The normally-open thermostat and the earth leakage circuit breaker
Where a temperature rise detection device consisting of
There is also a line example (Japanese Utility Model Laid-Open No. 63-160015). this
The preceding example raises the temperature when the drum heats up above a certain temperature.
The detector activates, and the temperature rise detector creates a breaker.
By moving the battery, not only when there is a leakage,
Even when the temperature is raised, the power supply is cut off.
However, this electric tool also uses 10 power and current.
It is as low as around 20A at 0V or 200V.
Therefore, such as an arc that flows a high current of about 70 A to 250 A
For welding, earth leakage breaker, thermostat, breaker
Safety and durability due to the use of precision electrical equipment such as
Can not be used on both sides. Welding cable winder
Is heavier than that for electrical work, and the shock
Since the lock is large, there is a great risk that the electric circuit will be disconnected.
Built in the drum because the electric circuit is not a single wire
It also requires some ingenuity. Furthermore, circuit breakers that use high currents
Sparks of high heat are likely to occur in the electric switching part,
There is also a problem that the electrode part (contact part) is welded due to
Therefore, it is necessary to improve it based on this point.

The present invention has been made in view of the above conventional circumstances, and the object of the present invention is excellent in durability and safety.
Another object of the present invention is to provide a welding cable winding machine having a mechanical electric opening / closing section with a simple structure .

[0005]

Technical means taken in order to achieve the above object, according to an aspect of is to So設an electrical switchgear unit the winding drum inner surface, the electrical opening portion, where it is transferred from the winding drum
A shape that detects a constant temperature and transforms itself into a memorized state
A stretchable member made of a memory alloy, a contactor that is linked to the stretchable member and is pushed by the stretchable operation of the stretchable member, and a contactee that constitutes a switch part that opens and closes with the contactor; They are respectively connected to the contacts, and an output unit for connecting the input portion and the welding cable to contact to the welding machine, the upper
The contactor is formed by connecting a short cylindrical part from the tip of the conical part.
In addition to forming the contacted element,
The hopper-shaped tapered surface and the cylindrical surface that come into contact with the
The elastic member has a predetermined shape.
When the temperature is detected, the contact is moved away from the contacted member.
The Der Rukoto those pushing the gist.

[0006]

According to the above technical means, when the heat of the wound welding cable heats the take-up drum portion, the expansion / contraction member itself made of a shape memory alloy expands to push the contactor to move the switch portion. Close and disconnect the electrical circuit that feeds the welding cable from the welder. Also, the height of 70A to 250A
Requires a large area of electrical contact to switch current
And occurs in the electrical contact area when the electrical circuit is disconnected.
Spark has a small contact area and its contact time
The shorter is also the smaller. Technical hand
According to the step, when energized, the conical part and the short cylindrical part of the contact are
Wide area on the hopper-shaped tapered surface and cylindrical surface of the contacted element
Contact with each other and push the elastic member
And the conical part of the contact moves away from the tapered surface of the contacted object.
And the short cylindrical portion contact with the cylindrical surface only with a small contact area.
It is separated while continuing to touch, and the spark is stopped small.

[0007]

As described above, the present invention is made from a shape memory alloy that detects a predetermined temperature and transforms itself into a memorized state.
The mechanical structure that cuts off the electric circuit that energizes the welding cable by pushing the contact by using the change in shape of the elastic member and separating it from the contacted member that constitutes one of the switch parts. Since it has a built-in opening / closing part,
Temperature rise detection device consisting of a normally open thermostat together with a disconnector
The device is handled as a prior art with a bypass circuit.
Therefore or electric circuit disconnected, leakage breaker and Sir Mosta
Danger of damage to precision electrical equipment such as switches and breakers
And reliability is significantly improved. Moreover, when energized
Is the conical part of the contactor, and the short cylindrical part is the hopper of the contactee
-Shaped taper surface, cylindrical surface in a wide area, expandable member
Detects the abnormal temperature, pushes the contactor and its short cylindrical shape
And the cylindrical surface are kept in contact with each other for a while and separated from each other.
Since the air circuit is disconnected, high current of 70A to 250A
Not only can the electric circuit be opened and closed reliably, but also when it comes in contact with it.
The shorter the time, the smaller the spark
According to the theory of
Electricity with excellent durability to open and close high current with less wear
A winding machine for a welding cable having an opening / closing portion can be provided.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 12 show an embodiment of the welding cable winder of this embodiment.

The winding machine A for welding cable is a support frame A.
1 The winding drum 2 is rotatably supported on the rotating shaft 1 which is cantilevered on the vertical rod 100 vertically mounted on the side frame portion A1 'on one side, and is wound around the winding drum 2. An electric opening / closing part 3 for opening / closing the energization between the welding cable X and the welding machine B is attached to the inner surface of the winding drum 2, and a current collector is arranged between the electric opening / closing part 3 and the welding machine B. The part 4 is incorporated in the rotary shaft 1 to form a structure.

The take-up drum 2 has a disk-like shape, and has a cable winding plate 2b, ... Assembled horizontally along the outline of the part 2c,
The cable receiving plate 2b forming the cable winding body portion 2c
The electric switch 3 is installed on one of the sheets.

The cable receiving plate 2b has a curved surface portion 2b-
1 from both side edges corresponding to the above-mentioned both side plate portions 2a, 2a
The mounting flange 2b-2 having the screw hole 200 formed therein is bent and formed.

As shown in FIG. 1 to FIG. 3, the electric switch 3 is open on both sides and has a curved main plate portion 3a formed of an insulating material and an insulating material for covering the open portion of the main plate portion 3a. The expansion / contraction member 3 is formed in the casing 3'which is assembled and formed by the sub plate portions 3b and 3b formed of the material and the cable receiving plate 2b.
d, a linking mechanism 3e linked to the elastic member 3d, a switch section 3f opened and closed by the linking mechanism 3e, an input section 3g for connecting the switch section 3f and the welding machine B, and an output connected to the welding cord X. The part 3h is internally provided.

The casing 3'has a second screw hole 201 formed in the curved end portion of the main plate portion 3a and the second screw hole 201.
Corresponding to the
A screw hole (not shown) is connected with a screw 300, and the heat conducting screw portion 203 provided on the sub-plate portions 3b and 3b and the first screw hole 200 of the cable receiving plate 2b are connected to the cable winding. Insertion hole 2 formed in both side plate portions 2a, 2a forming the body portion 2c
a'is connected by a screw 300 that is inserted, and the auxiliary plate portion 3b,
The first screw hole 200 is formed by inserting the insertion hole 2a 'into the screw hole 202 formed in the hole 3b so as to be separated from the heat conduction screw portion 203.
A screw 300 is screwed together with and fixed to the inner surface of the cable winding body portion 2c.

The heat-conducting screw portion 203 includes the sub-plate portions 3b and 3b.
A pair of cylindrical bodies 5 formed of a heat conductive material and having open end faces facing each other is screwed into a screw hole 203a formed in b, and a convex portion 203b integrally protruding from the ends is screwed into the screw hole 203a. A screw hole 203b 'opened in the portion 203b is formed by screwing the above-mentioned screw 300 fixed to both side plate portions 2a, 2a forming the cable winding body portion 2c.

The elastic member 3d is an elastic repellent strip formed of a shape memory alloy, and is contained in one of the tubular bodies 5 and 5 (hereinafter, referred to as a right tubular body). Inserted,
The heat transmitted through the heat transfer screw portion 203 changes its shape, and the movement thereof can be transmitted to the switch portion 3f by the linkage mechanism 3e.

The linking mechanism 3e is formed by the expanding and contracting member 3d so that the other tubular portion (hereinafter referred to as the left tubular body) will be described.
The first pusher 6 biased in the five directions and the second pusher 7 biased in the right tubular body by the elastic or resilient strip 8 made of metal or synthetic resin inserted in the left tubular body 5.
A oscillating plate 9 whose one end is sandwiched between the first and second pusher tips 6 and 7, and the other end of the oscillating plate 9, which is pivotally supported by the oscillating plate 9, through the heat transfer screw portion 203. When the elastic member 3d changes its shape by the heat transmitted by itself and the balance with the elastic force of the elastic repellency bar 8 is broken and the oscillating plate 9 oscillates, the oscillating motion is converted into a rotational motion. Conversion shaft unit 10 and its conversion shaft unit 10
Spindle 11 that is converted to linear motion by receiving the rotational motion of
And the spindle installed inside the center of the casing 3 '.
It is composed of a guide tube portion 12 that guides 11 and.

The conversion shaft portion 10 guides the spindle 11, and the guide tube portion 12 has a connecting hole 12b penetrating the wall portion 12a thereof, and a front lump portion 10a having a tapered end surface 10a 'is formed in the guide tube portion 12.
The repulsion spring member is inserted into the inner space of the contact hole 12b and between the front lump portion 10a and the support plate 13 fixed to the outer surface of the guide cylinder portion 12 near the communication hole 12b in the communication hole 12b.
It is configured such that the same block portion 10a is urged toward the spindle 11 by interposing 14.

The guide cylinder portion 12 of the spindle 11 has one end fixed to one of the sub-plate portions 3b and 3b and the other end having a length such that a space 400 is provided between the other sub-plate portion 3b and the sub-plate portion 3b. A spring material which is formed of an insulating material and is interposed between a flange portion 11a protruding in the middle of the spindle 11 to be described later and which repels the spindle 11 in the direction opposite to the direction of the space 400.
A receiving step portion 12c for 15 is formed stepwise.

The spindle 11 has a tapered truncated cone-shaped intermediate shaft portion at a portion corresponding to the tip lump portion 10a at the tip of the conversion shaft portion 10.
A pair of 11a and 11b are continuously provided via a small-diameter shaft portion 11c, and a rear end is projected from the casing 3 ', and an operating knob 11d formed of an insulating material is fixedly provided on the protruding end.

The intermediate shafts 11a and 11b have the same maximum diameter, and the intermediate shaft 11a on the front side (the space side) has a small diameter shaft 11c.
The rising surface 11a 'that forms the boundary with the engaging surface of the conversion shaft portion 10 with the front lump portion 10a, and the rear intermediate shaft portion 11b has the inclined surface 11b' of the front lump portion as the swing plate 9 swings. It functions as a guide surface for the taper end surface 10a 'of the portion 10a, and when the expansion / contraction member 3d has a stored temperature, the sharp angled portion 16 at the tip of the taper end surface 10a' is engaged with the rising surface 11a ', and the expansion / contraction member 3d changes due to temperature change. Changes its shape to cause the rocking plate 9 to rock, whereby the tapered end surface 10a 'is urged by the inclined surface 11b' against the biasing force of the spring member 15 when the tip mass portion 10a pivots. The tapered obtuse angle portion 17 at the rear end of the taper end surface 10a 'is guided so as to be immersed in 12b, and the rising surface 11
It is designed to escape from the tip end area of a ', and the obtuse angle portion 17 at the rear end of the tapered end surface 10a' is a rising surface as described above.
When it escapes from the 11a 'tip end region, the spindle 11 loses the stopper, and the spring member 15 retreats in the direction of expanding the space 400 by the elastic force.

The switch part 3f has a half-cylindrical shape and is fixed to the sub-plate part 3b on the side of the space 400 without contacting the end faces with each other, and the contacted member 18 is provided so as to close the space 400 part.
And a contactor 19 fixed to the tip of the spindle 11.

The contacted member 18 forms a hopper-shaped tapered surface 18a at a portion corresponding to the contactor 19, and the taper 18a is formed.
It has a shape in which a cylindrical surface 18b is connected from the tip of the par surface 18a.
Of the tapered surface 18a, the cylindrical surface 18b, and the contact 19
It has a large contact surface.

The contactor 19 is the tapered surface 18 of the contactee 18.
a and a cylindrical surface 18b continuous with the tapered surface 18a
Contacting the outer shape, that is, the tapered surface 18a
The conical part 19a is connected to the tip of the conical part 19a and contacts the cylindrical surface 18b.
And a short cylindrical portion 19b.

The input part 3g and the output part 3h have one ends protruding from the outlet 3i opened in the main plate part 3a of the casing 3 ', and the other ends are connected to the contacted member 18.

Next, the change in shape of the elastic member 3d and the opening / closing relationship of the switch portion 3f will be described with reference to FIGS. 4 to 6 show the case where the expansion and contraction member 3d is in a memory temperature state in which the shape is not changed, and as shown in FIGS.
The acute angle portion 16 at the tip of the tapered end surface 10a 'of 10 is engaged with the rising surface 11a' so that the contactor 19 and the contactee 18 are in contact with each other. In this state, when the heat of the cable winding body portion 2c is detected through the heat conducting screw portion 203 and the expanding / contracting member 3d expands to change its shape, as shown in FIG. The first pusher 6 is pushed toward the second pusher 7 side against the urging force, and both pushers 6,
A conversion shaft portion that receives the swinging force of the swinging plate 9 sandwiched by 7.
10 rotates. The conversion shaft portion 10 is formed with a tip lump portion 10a having a tapered end surface 10a 'at its tip, and the tip lump portion 10a is pushed back in the direction of the communication hole 12b by the guide function of the inclined surface 11b' while rotating. Taper end face 10
The obtuse-angled portion 17 at the rear end of a'is forcibly removed to a region where it does not engage with the rising surface 11a '(FIG. 8). Since the spindle 11 is constantly urged by the spring material 15 in the direction in which the contactor 19 is separated from the contactee 18, the taper end surface 10a ′ guides the conversion shaft portion 10 to move rearwardly and linearly. Retreat, close switch part 3f, and welder B
To disconnect the electric circuit that energizes the welding cable X from (Fig. 9, Fig. 10). At this time, the elastic member 3d pushes to make contact
The conical portion 19a of the child 19 is separated from the tapered surface 18a of the contacted member 18.
When they are separated, the short cylindrical portion 19b has a small contact with the cylindrical surface 18b.
Spark is separated while continuing contact only by the touch area
Stop small. Incidentally, after waiting until the elastic member 3d is restored to the memorized shape by natural cooling, the operation knob 11d is forcibly pushed against the elastic force of the spring material 15 and the rising surface 11a 'of the spindle 11 is pushed. When the taper end face 10a 'is engaged with the acute angle portion 16 of the tip end of the taper end face 10a'
Contact with each other to open the switch portion 3f, and the welding cable X is energized from the welding machine B. Further, it is preferable to use a shape memory alloy having a composition that reacts sensitively at the predetermined temperature (safety temperature of the coating of the welding cable X, for example, 70 ° C.) for forming the elastic member 3f.

Next, the current collector 4 which also functions as the rotary shaft 1 disclosed in FIGS. 11 and 12 will be described. Reference numeral 4a indicates a rotary shaft for connecting the center portions of the winding drum 2 between the side plate portions 2a and 2a. The casing 4b is fixed to the vertical rod 100 of the support frame A1, and the fixed cylinder 4c is fitted and fixed in the half casing 4a 'of the rotary shaft casing 4a. The fixed cylinder 4b includes the oil seal 20 and the insulating bush 21. A fixed energizing shaft 4d which is inserted through the contact plate portion 4c 'at the inner end and the connecting portion of the connecting cable 22 from the welding machine B at the outer end, and 4d is a disc between the contact plate portion 4c' and the contact plate portion 4c '. A rotary energizing shaft having a contacted plate 4d 'that contacts through a brush 23 at the inner end and rotatably fitted in the rotating shaft casing 4a and the other half portion 4a "through an oil seal 24 and an insulating bush 25. 4e has one end fixed to the outer end of the rotary energizing shaft 4d, Wherein the end side plates 2
Rotational force transmitting arm rods 4f that are hooked on the hooking ports 26 formed on one of a and 2a are cables that directly connect the rotary energizing shaft 4d and the input portion 3g. The current collector 4 is used for rotating the handle 27 projecting from one side plate 2a and for welding cable X.
When the winding drum 2 rotates in the forward direction or the reverse direction by the pulling-out operation, the rotation energizing shaft 4d and the contacted plate portion 4d 'are disc-shaped by the latching relationship between the rotation force transmitting arm rod 4e and the latching opening 26. The contact plate portion 4c 'of the fixed energizing shaft 4c is kept in contact with the contact plate portion 4c' of the fixed energizing shaft 4c via the brush 23 to keep the energized state.

Reference numeral 28 is a natural cooling port provided on both side plate portions of the winding drum at appropriate intervals.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view showing a relationship between an electric opening / closing portion and a winding drum.

FIG. 2 is an exploded perspective view showing a relationship between a cable receiving plate and an electric opening / closing portion.

FIG. 3 is an exploded perspective view showing the internal structure of the electric switchgear.

FIG. 4 is a schematic front view showing a relationship between a telescopic member and a spindle in an energized state.

5 is a sectional view taken along line (5)-(5) of FIG.

6 is a sectional view taken along line (6)-(6) of FIG.

FIG. 7 is a schematic front view showing a relationship between the expandable member and the spindle before the spindle retracts in the non-energized state.

FIG. 8 is a sectional view taken along line (8)-(8) of FIG.

FIG. 9 is a schematic front view showing the relationship between the expandable member and the spindle in a non-energized state with the spindle retracted.

10 is a sectional view taken along line (10)-(10) of FIG.

FIG. 11 is an enlarged cross-sectional view of a current collector portion.

12 is a sectional view taken along line (12)-(12) of FIG.

[Explanation of symbols]

A: Welding cable take-up drum 2: Take-up drum 3: Electric opening / closing part 3d: Elastic member 3f: Switch part 19: Contact element 18: Contact element B: Welder X: Welding cable 3g: Input part 3h: Output Part 19a: cone
Shaped part 19b: Short cylindrical part 18a: Tape
Par surface 18b: Cylindrical surface

Claims (1)

[Scope of utility model registration request] 1. An electric opening / closing section is provided on the inner surface of the winding drum,
The electric switchgear detects a predetermined temperature transmitted from the winding drum and deforms into a memorized state by a shape memory alloy.
And a contactor that is linked to the elastic member and that is pushed by the expansion and contraction of the elastic member, and a contacted member that constitutes a switch part that opens and closes with the contactor and the contacted member. Each of which is connected to a child and has an input section for connecting to a welding machine and an output section for connecting a welding cable ,
It is common to form short cylindrical parts by connecting them from the tip of the conical part.
The contacted element with the conical section and the short cylindrical section.
Continuously has a hopper-shaped tapered surface and a cylindrical surface
The elastic member detects a predetermined temperature.
Then, the contact element is pushed in the direction away from the contacted element.
Winder for welding cable, characterized in that the at it.