JPH032378Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a semi-automatic gas cutting machine that automatically moves over a material to be cut while performing fusing.
This invention relates to a simple semi-automatic gas cutting machine that can be easily set up and used in factories, construction sites, etc.

<<Prior Art>> Conventionally, as this type of simple semi-automatic gas cutting machine, the one disclosed in Japanese Patent Publication No. 54-2168, for example, is known. The one of this Japanese Patent Publication No. 54-2168 has a drive wheel placed on the side of the head of a cutting torch that can be attached and detached, and an electric motor placed inside the torch body.The rotation of the electric motor is controlled by a transmission shaft and a pair of gears. The structure is such that the signal is transmitted to the drive wheels via the .

《Problems to be solved by the invention》 In the patent publication No. 54-2168, a cap tire cord is connected to the grip of the cutting torch, and an electric motor with a speed reducer is attached to the support that connects the grip and the head of the cutting torch. , the rotation of the electric motor is transmitted to the first bevel gear fixed to the tip of the transmission shaft, a second bevel gear that meshes with the first bevel gear is arranged around the outer periphery of the head, and the circumferential surface of the drive wheel is brought into contact with the second bevel gear. Since it is configured to drive wheels, it is necessary to prepare a commercial power source or a generator for the electric motor, so there is a problem that it cannot be used at construction sites etc. where the power situation is poor. In addition, during the cutting operation, the power supply line (capture tire cord) of the electric motor is dragged, and there is a problem in that the sheathing of the power supply line is damaged by the corners of the material to be cut, causing an electrical leakage accident. Furthermore, in order to use the device in a foreign country where the commercial power supply voltage is different, there is a problem in that the specifications must be changed in accordance with the power supply situation. Furthermore, since the torch and the traveling drive mechanism are integrally formed, there is also the problem that it is difficult to carry out ordinary hand-held cutting operations.

<Means for Solving the Problems> The present invention solves the above-mentioned problems, and can be easily used as is even at construction sites with poor power supply conditions or in foreign locations with different power supply conditions. In order to provide a simple semi-automatic gas cutting machine that can be easily operated, a DC motor is supported on a drive case that pivots a drive wheel, and a drive gear and a drive are attached to the output shaft of this DC motor. A traveling unit is formed by meshing with a driven gear fixed to the input shaft of the wheel, a holder for the cutting torch is formed in the drive case of the traveling unit, and the head of the cutting torch is removably attached to this holder. At the same time, a battery holding part is formed in the main body of the cutting torch,
An on-off switch and a running speed controller are inserted in series in a circuit that connects the battery held in the battery holder and the DC motor in the running unit, and the on-off switch is connected to the cutting oxygen control valve provided on the cutting torch body. It is characterized by being configured to be switchable in conjunction with operation.

《Example》 The drawings show an example of the present invention. Figure 1 is a longitudinal sectional front view of a simple semi-automatic gas cutting machine, Figure 2 is an enlarged view of the main parts, and Figure 3 is an exploded perspective view of the main parts. .

This semi-automatic gas cutting machine consists of a cutting torch 3 having a nozzle 2 removably attached to a head 1, and a traveling unit 4.

The traveling unit 4 includes a drive case 6 that pivotally supports a drive wheel 5, a DC motor 7 with a reducer supported by the drive case 6, a cover 8 that covers the DC motor 7, and a cover 8 fixed to the tip of an output shaft 9 of the DC motor 7. It consists of a driving gear 10, a driven gear 12 fixed to one end of the input shaft 11 of the driving wheel 5, and an idler wheel 13 arranged corresponding to the driving wheel 5 with the driving case 6 sandwiched therebetween.
A holder 15 for the cutting torch 3 is attached to the tip of a bracket 14 extending from the drive case 6 toward the drive wheels 5 so that its relative position can be changed.

In this traveling unit 4, a stainless steel plate 16 is fixed to the side surface of the drive wheel side of the drive case 6 via a heat insulating material 17, and the drive wheel 5 is fixed to the input shaft 11 via a heat insulating material 18. Therefore, the DC motor 7 fixed to the drive case 6 is configured not to be affected by heat.

The holder 15 of the cutting torch 3 is formed to hold the instrument head 1 of the cutting torch 3 by tightening a pair of holding pieces 19, 19 with a tightening tool 20 consisting of a bolt and a wing nut. , cutting torch 3
The instrument head 1 is fixed to a holder 15 in a positioned state by a positioning mechanism 21.

The positioning mechanism 21 has the following configuration. That is, the circumferential surface 22 of the attachment part of the nozzle 2 in the head 1 of the cutting torch 3 has a locking groove 23 recessed in the circumferential direction in the axial direction, and the locking groove 2
Recessed holes 24 for locking in the rotational direction are formed at appropriate intervals in the circumferential direction on the back wall of the cutting torch 3, and steel ball insertion holes 25 are inserted through the holder 15 of the cutting torch 3 so as to pass through one of the clamping pieces 19. In addition, the steel ball insertion hole 25
The adjustment screw 26 is screwed into the steel ball insertion hole 25, and the spring 28 placed between the steel ball 27 inserted into the steel ball insertion hole 25 and the adjustment screw 26 pushes the steel ball 27 toward the torch insertion hole 29 side of the holder 15 and biases it. ing. Note that a piece 30 for preventing the steel ball from falling off is arranged at the end of the steel ball insertion hole 25 on the side of the torch insertion hole 29 .

A battery holding portion 3 is formed in the main body 32 of the cutting torch 3 and includes a dry battery 31 as a driving source for the DC motor 7.
A switch 34 and a variable resistor 35 for controlling the traveling speed are inserted in series in a circuit connecting the dry cell battery 31 and the DC motor 7. This variable resistor 35 is configured to change and adjust its resistance value by operating an operating piece 37 formed on a grip portion 36 of the torch body 32, and an on/off switch 34 is operated in conjunction with the operation of a cut-off oxygen regulating valve 38. It is designed to operate as a switch.

The cutting torch 3 and the traveling unit 4 are connected by a connecting wire 39 led out from the traveling unit 4, and a connector 40 is connected to the tip of the connecting wire 39.
is firmly fixed to the cutting torch 3, and the connecting wire 39 can be attached to and detached from the cutting torch 3 by means of this connector 40.

In the figure, reference numeral 41 is a battery chamber cover, and 42 is a guide scale engraved on the base of the holder 15 during tilt holding.

In the above embodiment, the holder 15 is fixed to the drive case 6 via the bracket 14, but one side wall of the drive case 6 may be extended and the holder 15 may be fixed directly to the extended side wall.

《Effects of the invention》 As mentioned above, in this invention, the motor that drives the drive wheels is driven by the battery held in the torch body, so temporary electrical work can be done even at construction sites where the power supply is poor. A semi-automatic gas cutting machine can be used without cutting.

In addition, since the power cord is not dragged during use, it is easy to run, and it is possible to prevent electrical leakage from occurring due to damage to the cord sheathing.

Furthermore, it can be used without any modification even in areas with different power supply conditions.

Moreover, since the torch is detachably attached to the traveling unit, by removing the torch from the traveling unit, hand-held cutting can be performed using only the torch.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional front view, FIG. 2 is an enlarged view of the main parts, and FIG. 3 is an exploded perspective view of the traveling unit. 1... Torch head, 3... Cutting torch, 4
... Traveling unit, 5 ... Drive wheel, 6 ... Drive case, 7 ... DC motor, 9 ... Output shaft of 7, 1
0...Drive gear, 11...5 input shaft, 12...
... Driven gear, 15 ... Holder, 31 ... Battery, 32 ... Main body of 3, 33 ... Battery holding part, 3
4... Open/close switch, 35... Traveling speed controller,
38...Disconnect oxygen control valve.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A DC motor 7 is supported in a drive case 6 which pivotally supports a drive wheel 5, and a drive gear 10 fixed to an output shaft 9 of the DC motor 7 and an input of the drive wheel 5. The traveling unit 4 is formed by meshing with the driven gear 12 fixed to the shaft 11, and the holder 15 of the cutting torch 3 is formed in the drive case 6 of the traveling unit 4, and the head of the cutting torch 3 is attached to this holder 15. The battery holding portion 33 is attached to the body 32 of the cutting torch 3 in a detachable manner.
The battery 3 is formed and held in the battery holding part 33.
An on-off switch 34 and a running speed controller 35 are inserted in series in a circuit connecting the DC motor 7 in the cutting torch body 32 to the cutting torch body 32. A simple semi-automatic gas cutting machine characterized by a configuration that allows switching in conjunction with operation. 2. Scope of Utility Model Registration The simple semi-automatic gas cutting machine according to claim 1, wherein the DC motor 7 is a DC motor with a speed reducer. 3. A simple semi-automatic gas cutting machine according to claim 1 or 2 of the utility model registration claim, in which the holder 15 for the cutting torch 3 is formed on the drive wheel 5 side of the drive case 6.