JPH07178546A - Torch holding structure - Google Patents

Abstract

PURPOSE:To provide torch holding structure provided with a function to prevent a torch from being damaged due to the shock of collision by the separation of the torch from a bracket which holds the torch when it collides with a cer tain material, the one to inform by detecting the separation of the torch to an operator, and the one to restore the torch separated once to an original position. CONSTITUTION:This structure is formed in such a way that a flange 4 which comprises a part of a torch main body T and equipped with a magnet 8, a switch 13, and a through hole 10 at prescribed positions, respectively, and the bracket 2 equipped with a groove 3 formed in accordance with the shape of the flange 4 and a restoration member R on which a magnetic material 9 and an elastic member 12 are arranged in accordance with the magnet 8 and the through hole 10, respectively are provided, and the flange 4 is fitted in the groove 3, and they are joined mutually by the magnetic force of the magnet 8 and that of the magnetic material 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torch holding structure,
In particular, the present invention relates to a torch holding structure for holding a gas torch, a plasma torch, a laser torch, etc. which are automatically controlled.

[0002]

2. Description of the Related Art In the conventional technique of this type, the torch body is generally wrapped and held by a torch holder or the like.

[0003]

However, when adjusting or inspecting the NC control device, the torch is processed due to an operator's operation error or a contact failure of a sensor attached to the torch tip to prevent collision of the torch. There was a problem that it was damaged by colliding with obstacles such as wood.

Further, there has been a problem that a part of the product rises or protrudes and collides with the torch due to thermal strain caused by the material to be cut just before the end of cutting or the weight imbalance of the product, and the torch is damaged.

Therefore, the torch holding structure according to the present invention is
When the torch collides with something, the torch is detached from the bracket holding the torch to prevent the torch from being damaged by the impact of the collision, and the torch is detached and notified to the operator. Function,
(EN) Provided is a torch holding structure having a function of restoring a torch once detached due to a collision or the like to an original position.

[0006]

A torch holding structure according to the present invention is a technique which has fundamentally improved the above-mentioned conventional problems, and its gist is to hold the torch body by engaging it with a bracket. In the torch holding structure, the torch body is provided with a flange that constitutes a part of the torch body and has a first magnetic body at a predetermined position, and a groove formed in a predetermined shape so as to be fitted to the flange. And comprising a bracket in which a second magnetic body is arranged at a position corresponding to the first magnetic body in the groove, and by configuring the first magnetic body and / or the second magnetic body with a magnet, The flange is fitted in the groove, and the first magnetic body disposed on the flange is magnetically joined to the second magnetic body disposed on the bracket to hold the torch body. Characterize.

Further, in the torch holding structure according to the present invention, in the torch holding structure, a restoring member for pressing and joining the flange and the bracket with a predetermined elastic force is attached to the flange and / or the bracket. Is characterized by.

Further, in the torch holding structure according to the present invention, in the torch holding structure, a switch for generating a drive signal by detecting detachment of a flange fitted in a groove formed in the bracket is provided in the bracket. Alternatively, it is arranged on the flange.

[0009]

The torch holding structure according to the present invention, as described above,
A first magnetic body is disposed and fixed to a flange forming a part of the torch body to form a groove that fits into the flange, and a first magnetic body is formed at a position corresponding to the first magnetic body in the groove. Two
The first magnetic body and / or the second magnetic body is constituted by a magnet, and the flange is fitted in the groove and the first magnetic body is formed.
The torch body can be fixed at a predetermined position of the bracket by magnetically joining the magnetic body of 1 to the second magnetic body.

Further, when the torch body is impacted by a collision with an obstacle such as a work material, the magnetic substance fixed to the magnetically joined flange and the magnetic substance arranged on the bracket are detached. You can separate it to avoid the torch.

Further, since the restoring member is disposed between the flange and the bracket, even if the torch is temporarily detached due to a collision, the elastic force of the restoring member pushes the flange back to automatically restore the state before the collision. It is possible.

Further, since the switch arranged on the flange or the bracket detects the detachment of the flange fitted in the groove formed in the bracket and generates a drive signal, the torch body is impacted by a collision or the like. When the flange is detached from the groove formed in the bracket in response to this, the switch is driven and a drive signal is generated to detect the detachment of the torch body.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, one embodiment of the case where the torch holding structure according to the present invention is applied to a laser processing apparatus will be specifically described. FIG. 1 is a perspective view showing the torch holding structure of the present invention.
2 is a cross-sectional explanatory view when the torch body is in a steady state, and FIG. 3 is a cross-sectional explanatory view when the torch body is detached.

As shown in the figure, a ring shape having a through hole 2a in the center and a groove 3 formed of a cylindrical inner peripheral wall 3a and a stage 3b, etc., at a predetermined position on the support base 1a of the torch support member 1. Of the torch body T, which is integrally mounted with a ring-shaped flange 4 configured to be fitted in the groove 3 with a predetermined accuracy, is attached to the groove 4 and the groove 4. Torch support member 1 by fitting
Can be fixed in place by.

Therefore, after the laser beam 5 emitted from the laser oscillator (not shown) enters the torch body T through the optical path 6, the assist gas is jetted from the nozzle hole 7 to process the workpiece (not shown). Is possible.

The groove 3 formed in the bracket 2 is composed of an inner peripheral wall 3a, a stage 3b, and a tapered surface 3c. The inner peripheral wall 3a and the stage 3b respectively correspond to the outer peripheral wall 4a and the bottom surface 4b of the flange 4, respectively. It is configured such that the torch main body T can be detached when the torch body T collides with any obstacle. The tapered surface 3
c has a function of a guide for fitting the flange 4 into the groove 3.

Therefore, by fitting the flange 4 into the groove 3, the torch body T can be fixed at a predetermined position with respect to the bracket 2, and the torch body T collides with some obstacle. In the case of flange 4 promptly
The torch body T is not greatly damaged when the torch body T is detached from the groove 3.

A plurality of magnetic bodies 9 are embedded in the stage 3b of the bracket 2 at predetermined positions, and a magnetic body formed of a magnet is formed on the bottom surface 4b of the flange 4 at a position corresponding to the magnetic body 9. 8 is buried. Therefore, when the flange 4 is fitted to the bracket 2 along the groove 3, the magnetic bodies 8 and 9 made of magnets are firmly joined by the magnetic force.

A plurality of through holes 10 having a predetermined diameter are bored at predetermined positions of the flange 4, and a predetermined depth is provided at a position corresponding to the through holes 10 and at a predetermined position of the stage 3b of the bracket 2. A plurality of screw holes 2b are formed in the screw hole 2b, and the screw holes 2b have a diameter smaller than the diameter of the through hole 10 and a pin 11b having a screw portion 11a and a spring receiver 11c.
A restoring member R including the elastic member 12 and the like is provided so as to project.

The pin 11b includes a spring receiver 11c and a flange 4
The flange 4 with an elastic member 12 interposed between the flange 4 and the surface 4c.
Threaded portion 11 formed on the pin 11b through the through hole 10 of
It is fixed by screwing a into the screw hole 2b.

The elastic member 12 is a coil-shaped spring, and the pin 11b is inserted into the hollow part of the elastic member 12, and the surface 4c of the flange 4 and the spring receiver 11c are pushed apart by a predetermined elastic force, so that the flange 4 It is possible to press and join the bracket 2 with each other.

Numeral 13 is a switch for detecting a collision of the torch body T. In a steady state, the driving portion 13a is constituted by an elastic member (not shown) constituting the switch 13 so as to be maximally projected, and an external force is applied. Driven by 13a
The switch 13 can be opened and closed by pushing.

The switch 13 includes a drive unit 13a for the stage 3
In a steady state in which the drive unit 13a is embedded in a predetermined position of the flange 4 facing the b, and the flange 4 is fitted in the groove 3 of the bracket 2, the drive unit 13a operates by the weight of the torch body T or the elastic member.
It is set in a state in which it is pushed in by the elastic force of 12 and the tip is in contact with the stage 3b of the bracket 2.

Further, the switch 13 is connected to an alarm device (not shown) via a cable 13b, and it is possible to notify the operator by a patrol light, an alarm buzzer or the like to temporarily stop the laser processing device.

The operation and effect of the torch holding structure of the present embodiment will be described using the laser processing apparatus having the torch holding structure configured as described above. To the torch body T in the steady state shown in FIG. As shown in FIG. 3, an obstacle O such as a workpiece collides with the tip of the torch body T and an external force is applied to the torch body T that exceeds the joining force of magnetically joining the magnet 8 and the magnetic body 9. Then, the magnet 8 and the magnetic body 9 are detached,
The surface 4 of the flange 4 in the opposite direction with which the obstacle O is in contact
c pushes the elastic member 12, and the flange 4 is detached from the groove 3 of the bracket 2 while being engaged with the pin 11b.

Then, the driving portion 13a of the pushed switch 13 is projected to open and close the switch 13 to detect the fall of the torch body T and to notify the operator by driving an alarm or a patrol light. is there.

As described above, the torch body T that has once fallen off is pressed against the surface 4c of the flange 4 by the elastic member 12 after the torch body T is avoided from the obstacle O or after the obstacle O is removed. The flange 4 is guided to the tapered surface 3c and fitted into the groove 3 so that the magnet 8 and the magnetic body 9 are magnetically joined again, and the torch body T is restored to the original state.
At this time, the drive portion 13a of the switch 13 also returns to the original state.

As described above, the outer peripheral wall 4a of the flange 4,
Since the bottom surface 4b is configured to be fitted to the inner peripheral wall 3a of the bracket 2 and the stage 3b with a predetermined accuracy, the torch body T can be always coaxially restored.

In this embodiment, the magnet 8 and the magnetic body 9 are embedded in the flange 4 and the bracket 2, respectively.
Various arrangement methods can be applied, such as attaching and attaching each. Further, although the magnetic body 8 arranged on the flange 4 side is composed of a magnet and magnetically joined to the magnetic body 9 arranged on the bracket 2 side, the magnetic body 9 is composed of a magnet on the contrary. Is also good.

Further, the magnetic bodies 9 and 8 respectively arranged on the bracket 2 and the flange 4 may be composed of magnets having different polarities and joined together. Further, although the magnet is a permanent magnet, it may be an electromagnet. The bracket 2 and the flange 4 may be entirely made of a magnetic material.

In this embodiment, the elastic member is a coil spring and the corresponding pin 11b is used.
Any elastic member such as a leaf spring or a hydraulic damper may be used as long as it can exert various elastic forces to restore the torch body T.

Further, although the restoring member in this embodiment is constructed by projecting the pin 11b on the stage 3b of the bracket 2,
For example, an arm is extended from the outer periphery of the bracket 2 and an elastic body is provided at the tip of the arm to provide a surface 4c of the flange 4.
May be pressed with a predetermined elastic force, and various restoring members are conceivable.

In the present embodiment, the switch 13 is driven by bringing the drive unit 13a into contact with the stage 3b of the bracket 2. However, for example, an optical relay switch or a magnetic switch for detecting without contacting the drive unit is used. It is also possible to use a non-contact switch such as.

Further, although the present embodiment is applied to the laser processing apparatus, it is not limited to this, and it can be used for a plasma processing apparatus, a gas processing apparatus and the like.

[0035]

Since the torch holding structure according to the present invention has the above-described structure and operation, the flange forming the torch body T is fitted in the groove formed in the bracket and is arranged on the flange and the bracket. The torch body can be held at a predetermined position by magnetically joining the magnet and the magnetic body.

Further, even if the torch body collides with an obstacle, the magnetically joined flange and bracket are detached to avoid the torch body, so that the impact can be mitigated and damage to the torch due to a collision can be prevented. The maintenance of the torch body is improved.

Further, since a switch is arranged between the flange and the bracket to detect detachment of the torch body, the operator can be notified by an alarm device or the like connected to the switch. Further, the processing device may be stopped when it is being processed.

Further, even if the torch body is detached, it has a restoring function, so after the obstacle is removed, it can be automatically restored to a predetermined position and the work can be continued. There is no need to worry about position adjustment.

Further, the nozzle portion can be rotated in a desired direction as required by forming a through hole formed in the flange into a fan-shaped hole.

[Brief description of drawings]

FIG. 1 is a perspective view showing a torch holding structure of the present invention.

FIG. 2 is a cross-sectional explanatory view of a torch body in a steady state.

FIG. 3 is a cross-sectional explanatory view when the torch body is detached.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Support member 1a ... Support base 2 ... Bracket 2a ... Through hole 2b ... Screw hole 3 ... Groove 3a ... Inner peripheral wall 3b ... Stage 3c ... Tapered surface 4 ... Flange 4a ... Outer peripheral wall 4b ... Bottom surface 4c ... Surface 5 ... Laser light 6 ... Bellows 7 ... Nozzle hole 8 ... Magnet 9 ... Magnetic body 10 ... Through hole 11a ... Screw part 11b ... Pin 11c ... Spring receiver 12 ... Elastic member 13 ... Switch 13a ... Drive part 13b ... Cable R ... Restoring member T ... Torch Body

Claims (3)

[Claims] 1. A torch holding structure for engaging and holding a torch body with a bracket, comprising: a flange that constitutes a part of the torch body and has a first magnetic body arranged at a predetermined position;
The bracket has a groove formed in a predetermined shape so as to be fitted to the flange, and a second magnetic body is arranged at a position of the groove corresponding to the first magnetic body. By configuring the magnetic body and / or the second magnetic body with a magnet, the flange is fitted in the groove, and the first magnetic body disposed on the flange is disposed on the bracket. A torch holding structure characterized by holding a torch body magnetically bonded to a magnetic body. 2. The torch holding structure according to claim 1, wherein a restoring member for pressing and joining the flange and the bracket with a predetermined elastic force is mounted on the flange and / or the bracket. 3. The switch according to claim 1 or 2, wherein a switch for generating a drive signal by detecting detachment of a flange fitted in a groove formed in the bracket is arranged on the bracket or the flange. The torch holding structure described.