JP2503799Y2 - Hanging type spot welding equipment - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> This invention is a suspension that can be moved to an arbitrary position in a work area by being suspended by a guide rail arranged on the ceiling of a factory. The present invention relates to a hanging spot welding apparatus, and more particularly, to a hanging spot welding apparatus with improved movement operability and maneuverability.

<< Prior Art >> Conventionally, a hanging type spot welding apparatus in which a spot welding apparatus is arranged by being hung on a beam or a guide rail in a ceiling of a factory is well known.

This suspension type spot welding apparatus is provided with a plurality of pulleys 4, 4, ... Which are movable along the longitudinal direction of a guide rail 2 arranged on the ceiling, as shown in FIG. 4, for example. Each pulley 4, 4, ... Has a welding transformer 6, a welding gun 8, and an intermediate portion of a secondary power supply cable 10 connecting the welding transformer 6 and the welding gun 8 suspended and supported. When the welding work is not performed, the welding gun 8 and the welding transformer 6 are retracted to the standby position outside the welding work area, and at the time of welding, the welding gun 8 and the welding transformer 6 are moved to an arbitrary welding work position in the welding work area. The welding work is performed by moving it to the vicinity.

<< Problems to be Solved by the Invention >> By the way, in the above-mentioned conventional suspension type spot welding apparatus, if the length of the secondary power supply cable 10 is increased, the secondary power supply cable 10 interferes with various operations. The length is set to be short, and during welding work, the entire spot welding apparatus including not only the welding gun 8 but also the welding transformer 6 is moved to the vicinity of any welding work position in the work area. It was

However, when the welding transformer 6 is moved, its weight is so heavy that a large amount of force is required for its movement, and there is a problem that the moving operability is poor.
Although the length of the secondary power supply cable 10 is set to be short so as not to interfere with various works, a certain length is secured in consideration of maneuverability of the welding gun 8 during welding work. However, there is a problem that it is difficult to balance the set length.

The present invention has been made in view of such circumstances, and an object thereof is a hanging type which is excellent in moving operability and maneuverability of a welding gun, and in which a secondary power feeding cable does not interfere with various works. It is to provide a spot welding device.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a conductive member which is connected to a welding transformer and is provided on the guide rail along the longitudinal direction of the guide rail, and the guide rail. A movable body that is provided so as to be movable along the longitudinal direction, a welding gun that is hung from and supported by the movable body, and a power supply cable that is attached to the movable body and that extends from the welding gun so that it can be disconnected. The suspension type spot welding apparatus is provided with the connecting / disconnecting means connected to the member.

<Operation> According to the suspension type spot welding apparatus of the present invention having the above configuration, at any welding work position in the welding work area,
Move the welding gun that is movably suspended on the guide rail, and do not move the welding transformer. Further, the power supply to the welding gun is to connect a power supply cable extending from the welding gun to a conductive member connected to the welding transformer and provided on the guide rail along the longitudinal direction of the guide rail at least at the time of welding by the disconnecting means. Done by.

The conductive member uses a guide rail for a moving body that suspends and supports the welding gun, and is arranged along the longitudinal direction of the guide rail. Therefore, it is not necessary to separately secure a space for disposing the conductive member, which saves space. And the welding gun itself can be downsized.

<< Embodiment >> An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side view showing a schematic configuration of the entire suspension type spot welding apparatus according to the present invention.

As shown in the figure, the hanging spot welding apparatus 20 is a guide rail 22 arranged on the ceiling of a factory, and a conductive member 24 provided along the longitudinal direction of the guide rail 22,
A movable body 26 provided on the guide rail 22 so as to be movable in the longitudinal direction thereof, a welding gun 28 suspended from the movable body 26, and a welding gun 28 extending from the welding gun 28.
Mainly composed of a connecting / disconnecting means 32 for connecting the next power supply cable 30 to the conductive member 24 so as to be connectable / disconnectable, and a welding transformer 34 suspended from the ceiling on one end side in the extending direction of the guide rail 22. The secondary power supply cable 30 extending from the welding transformer 34 is connected to the conductive member 24.

2 is a perspective view showing the welding gun 28 suspended on the guide rail 22, and FIG. 3 is a front view showing the details of the portion A in FIG.

As shown in FIGS. 2 to 3, the guide rail 22 has an I
Shaped steel is used, and conductive members 24 are attached to both side surfaces along the lengthwise direction of the steel via an insulator 36.

Further, on the flange portion 22a at the lower end of the guide rail 22 made of I-shaped steel, there is provided a movable body 26 which is locked to the flange portion 22a and is movable along the longitudinal direction. This moving body 26
A frame body 42 is composed of two left and right side plates 38, 38 provided facing the left and right sides of the lower part of the guide rail 22, and a rod 40 connecting the side plates 38, 38 below the flange portion 22a. , The left and right side plates 38, 38 on the frame body 42
Two pairs of rollers 44, which project inwardly from and are locked to the upper surface of the flange 22a, are attached.

Further, the connecting / disconnecting means 32 is attached to the moving body 26 as described above. The connecting / disconnecting means 32 includes brackets 46, 46 attached to the outer surfaces of the left and right side plates 38, 38 of the moving body 26, and left and right members pivotally supported by the brackets 46, 46, respectively. Two arms 48,48
And an extendable cylinder 50 rotatably pin-coupled to the lower ends of the two left and right arms 48, 48,
The cylinder 5 is composed of circular shaft-shaped conductors 54, 54 attached to the upper ends of the two left and right arms 48, 48 via insulating bushes 52 and extended toward the guide rail 22 side.
When 0 is extended, the left and right conductors 54, 54 come into contact with the conductive members 24, 24 on both side surfaces of the guide rail 22 to press them down.

A welding gun 28 is suspended and supported by the moving body 26. In this embodiment, as shown in the figure, the welding gun 28 has a secondary power supply cable 30 extending therefrom connected to the conductors 54, 54 of the connecting / disconnecting means 32, and the moving body 2 is connected via the connecting / disconnecting means 32.
Backed by 6. That is, the conductor 54 of the connecting / disconnecting means 32,
54 is projected to the outside of the two arms 48, 48, and support stays 56, 56 made of a conductive material are provided on the projections of the arms 48, 48.
Is installed in an insulated state against. Each of the support stays 56, 56 is curved outward and extends downward,
Secondary power supply cable 30 extending from the welding gun 28 at its lower end
Are connected via ball joints. Also, 2
The two core wires in the next power supply cable 30 are electrically connected to the support stays 56, 56, respectively, while maintaining an insulated state from each other.

Further, in this embodiment, as shown in FIG.
The cylinder 50 of 32 is a switch of the welding gun 28 whose expansion and contraction operation is
The switch is controlled in synchronization with the ON / OFF operation of the 58
Is set to the ON state, the conductors 54, 54 are extended to press the conductors 54, 54 between the conductive members 24, 24 on both side surfaces of the guide rail 22, while the cylinder 50 is contracted to set the conductors 54, 54 in the OFF state. , 54 are separated from the conductive members 24, 24. That is, although not shown, in the cylinder 50, the valve of the supply and discharge system of the working fluid is controlled in synchronization with the operation of the switch 58 of the welding gun 28, and the switch 58 of the welding gun 28 is an intermittent means. It also constitutes control means 60 for controlling the operation of 32.

In the suspension type spot welding apparatus 20 thus configured, when performing welding work at any welding work position within the welding work area set under the guide rail 22, pull only the welding gun 28 up to its vicinity. Moving. At this time, the cylinder 50 of the connecting / disconnecting means 32 is contracted, and the conductor
54, 54 are separated from the conductive members 24, 24 of the guide rail 22, the welding gun 28 and the welding transformer 34 are not connected, and the moving body 26 that suspends the welding gun 28 can be easily It will be moved.

Then, place the welding gun 28
When the welding gun 28 is set to a predetermined welding position and the switch 58 is turned on, the cylinder 50 of the connecting / disconnecting means 32 is extended and the conductors 54, 54 of the connecting / disconnecting means 32 are guided to the guide rail 22. By pressing the attached conductive members 24, 24, the welding gun 28 and the welding transformer 34 are connected,
After that, the welding current is sparked from the welding gun 28.

That is, according to the suspension type spot welding apparatus 20,
At an arbitrary welding work position in the welding work area, only a welding gun 28 suspended from a moving body 26 provided on the guide rail 22 so as to be movable along its longitudinal direction is pulled and moved to the vicinity thereof. The welding transformer 34 does not need to be moved as in the conventional case. Therefore, the labor for moving the welding transformer 34 can be reduced, and the moving operability can be improved as much as possible.

Further, the power supply to the welding gun 28 is performed by connecting and disconnecting the secondary power supply cable 30 extending from the welding gun 28 to the conductive member 24 connected to the welding transformer 34 and provided along the longitudinal direction of the guide rail 22 by at least the connecting / disconnecting means 32. Since it is performed by connecting at the time of welding, the length of the secondary power feeding cable 30 can be made as short as possible without impairing the manipulability of the welding gun 28 at the time of welding, and thus the secondary power feeding can be performed. It becomes possible to prevent the cable 30 from interfering with various operations. Furthermore, since the primary power supply cable (not shown) connected to the welding transformer 34 is also not routed within the welding work area, it becomes possible to prevent the primary power supply cable from interfering with various operations. .

Note that, in this embodiment, the rocking / closing mechanism using the cylinder 50 as the actuator for actuating the connecting / disconnecting means 32 is used, but an electric motor, an electromagnetic solenoid, or the like may be used as the actuator. Of course, the swing opening / closing mechanism itself may be replaced with that of another opening / closing mechanism. Further, the guide rail 22 itself may be supported from the ceiling side via another guide rail or the like so as to be further movable in a direction orthogonal to the extending direction thereof. It becomes possible to secure a wider welding work area excellent in the transfer operability and maneuverability thereof.

<Effects> As described in detail in the above embodiments, according to the suspension type spot welding apparatus according to the present invention, the welding gun is suspended on the movable body provided movably along the longitudinal direction of the guide rail. The moving body is provided with a connecting / disconnecting means capable of appropriately connecting / disconnecting a power supply cable extending from the welding gun to a conductive member provided on the guide rail and connected to the welding transformer along the longitudinal direction of the guide rail. hand,
At least at the time of welding, the connecting / disconnecting means is connected to supply power to the welding gun, so that the following excellent effects are exhibited.

(1) Only the welding gun needs to be pulled and moved to an arbitrary welding work position in the welding work area, and since it is not necessary to move the welding transformer, the labor at the time of the movement can be reduced, and the moving operation can be performed. It is possible to improve the sex as much as possible.

(2) The length of the secondary power supply cable extending from the welding gun can be made as short as possible without impairing the manipulability of the welding gun during welding, and the secondary power supply cable interferes with various operations. Can be prevented as much as possible.

(3) Since the conductive member is arranged along the longitudinal direction of the guide rail for the moving body that suspends and supports the welding gun, it is not necessary to separately secure the installation space, Space saving and miniaturization of the welding gun itself can be achieved.

(4) Further, if the operation of the connecting / disconnecting means is synchronized with the switch movement of the welding gun, the operability can be further improved.

[Brief description of drawings]

FIG. 1 is a side view showing an overall schematic structure of a suspension type spot welding apparatus according to the present invention, FIG. 2 is a perspective view showing a welding gun suspended on a guide rail, and FIG. FIG. 4 is a front view showing the details of the portion A, and FIG. 4 is a side view showing a schematic configuration of a conventional hanging spot welding device. 20 …… Suspended spot welding device 22 …… Guide rail 24 …… Conductive member 26 …… Movement 28 …… Welding gun 30 …… Feeding cable 32 …… Interrupting means 34 …… Welding transformer 60 …… Control means

Claims (2)

(57) [Scope of utility model registration request] 1. A conductive member connected to a welding transformer and provided on the guide rail along the longitudinal direction of the guide rail; a movable body provided on the guide rail so as to be movable along the longitudinal direction; A welding gun suspended from the body and supported; and a connecting / disconnecting means attached to the moving body, and connecting / disconnecting a power supply cable extending from the welding gun to the conductive member in a connectable and disconnectable manner. Hanging type spot welding equipment. 2. A conductive member connected to a welding transformer and provided along the longitudinal direction of the guide rail, a movable body provided on the guide rail so as to be movable along the longitudinal direction, and suspended from the movable body. A supported and supported welding gun, an intermittent means attached to the movable body and connecting a power supply cable extending from the welding gun to the conductive member in a freely connectable and disconnecting manner, and the intermittent means synchronizing the switch movement of the welding gun. A suspension type spot welding device, comprising: