JPS643578Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention automatically cuts off the edges (long cutting scraps) at the side edges of the steel plate cut to a desired width into short pieces, and forms a bevel on the cut surface of the steel plate in a later process. The present invention relates to an improvement of a gas cutting device for cutting edges of steel plate side edges, which facilitates the process.

This type of cutting device has already been disclosed in Japanese Patent Publication No. 46-14129.

To briefly explain its configuration based on FIG. 1, 1 is a gas cutting device fixed to a horizontal beam 3 that moves straight on a cutting surface plate 2; It is composed of a support stand 4, a fixed blowpipe 6 attached to the tip of a fixed arm 5 and located at the forefront in the direction of movement, and a cross blowpipe 8 attached to the tip of a swing arm 7 and located behind the fixed blowpipe 6. Ru.

The fixed arm 5 supporting the fixed blowpipe 6 has a U-shape with its arms bent outward, and its base end 5a is fixed to the support base 4, and its midsection 5b extends inward at right angles to the direction of movement. A cam base 11 has a support rod 9 attached thereto and is connected to a drive motor 10 at its tip.
Attach.

The swing arm 7 is substantially L-shaped and supports the support base 4.
The cam follower 13 is attached at a position corresponding to the cam driver 11. The cam follower 13 is rotatably supported by a support shaft 12 which is fixed to the base end 5a of the fixed arm and extends symmetrically to the base end 5a of the fixed arm.

The cam follower 13 is urged in the direction of the arrow by an elastic member 14 whose other end is locked to the support base 4.

Next, the cutting method will be explained. While the fixed blowpipe 6 cuts the steel plate side end 15a in the advancing direction, the cam master 11 is rotated by the rotation of the drive motor 10, and the cam follower 13 is rotated by the rotation of the cam master 11. The swing arm 7 rotates in the B direction via the . Then, the transverse blowpipe 8, which is in a fixed position on the same straight line as the fixed blowpipe 6, automatically moves in the direction B to perform the ear cutting.

According to this prior art, since the rotation angle range of the cross blowpipe 8 is determined by the shape of the cam base 11, in order to adjust the rotation angle, the cam base 11
Either replace the cam base 11 and the cam follower 13 on the arms 5 and 7, and move the fulcrum 12a.
It is necessary to change the distance from cam 1.
By exchanging parts 1 and 13, it is not possible to freely adjust the rotation angle, and in the method of changing the distance from the fulcrum 12a, the distance between the fulcrums must be calculated each time using a calculation formula, so it is easier to adjust the angle. Have difficulty.

In addition, in this prior art, since the cutting start point of the cross blowpipe 8 (fixed position on the same straight line as the fixed blowpipe 6) is determined by the contact between the cams 11 and 13 and the elastic member 14, it is easy to wander. For this reason, there is a risk that the inner end side of the steel plate 15 may be erroneously fused at the time of return.

It is an object of the present invention to provide a gas cutting device for removing the edge of a steel plate side edge of a steel plate, etc., which can eliminate the drawbacks of the prior art.

An object of the present invention is to provide a gas cutting device for ear cutting, which allows the rotation angle range of a cross-section blowpipe to be easily and freely adjusted.

Another object of the present invention is to provide a gas cutting device for ear cutting that can always accurately and reliably return the ear-cut cross-blowpipe to its home position. This prevents the risk of accidentally cutting the inner end of the steel plate during return.

Another object of the present invention is to create a gas cutting device for edge removal that is extremely convenient for handling and maintenance inspection by configuring the horizontal blowpipe separately from the fixed blowpipe that cuts the steel plate side end in the advancing direction. The purpose is to provide.

The present invention will be explained below with reference to the drawings.

Figures 2 to 6 all show embodiments of the present invention. Figure 2 is a schematic plan view of this embodiment mounted on a horizontal beam, Figure 3 is its front view, and Figure 4 shows the slip mechanism. A- in Fig. 3, with a part cut out to show
FIG. 5 is an enlarged view taken along the line B-B' of FIG. 3 with a portion cut away to show the transmission mechanism, and FIG. 6 is a bottom view taken along the line C-C' of FIG. 5.

In FIGS. 2 and 3, reference numeral 20 denotes a horizontal beam that moves straight on a cutting surface plate (not shown), and on the beam 20 there is a main gas cutting device 21 for cutting the steel plate side end 15a in the traveling direction A, and a lug. A removal gas cutting device 22 is attached.

The main gas cutting device 21 includes a support stand 23 movable on the horizontal beam 20 and a fixed arm 24 extending from the support stand 23 in a direction perpendicular to the horizontal beam 20.
and a fixed blowpipe 25 attached to the tip thereof, and is configured to be able to cut the steel plate side end 15a in the traveling direction A following the movement of the horizontal beam 20.

The ear cutting gas cutting device 22 is installed so as to be located outside the main gas cutting device 21, and like the gas cutting device 21, the horizontal beam 2
0, a transmission mechanism 28 attached to the tip of a fixed member 27 extending from the support 26 in a direction perpendicular to the horizontal beam 20, and a transverse blowpipe 29 attached to the tip. An arm mechanism 30 that performs settings, and a drive motor 31 that rotates the arm mechanism 30 via the transmission mechanism 28.
It is composed of.

The arm mechanism 30 includes a horizontal arm 33 that can be moved horizontally by operating a dial 33a, and a dial 3 that is attached to the tip of the horizontal arm 33.
The proximal end of the vertical arm 34 and the horizontal arm 33, which are movable in the vertical direction by operation 4a, is fixed to the tip of a support shaft 32 hanging downward from one housing body 37 of the transmission mechanism 28, and the support shaft It is configured to be rotatable about 32 as a fulcrum. On the other hand, a blowpipe gripping portion 35 is disposed at the tip of the vertical arm 34, and the transverse blowpipe 29 is positioned perpendicularly to the surface of the steel plate 15.

In FIGS. 4 and 5, the transmission mechanism 28 consists of two housing bodies 36 and 37 connected by a transmission shaft 40. Inside one housing body 36, a drive motor 31 is attached to the upper surface, and a drive motor 31 is attached to the inside of the housing body 36. A slip mechanism 42 is provided.

The drive motor 31 has a built-in timer and a reversing mechanism in a control circuit (not shown), and the drive shaft 31
a is extended into the housing body 37, and a gear 31b is attached to its tip.

The slip mechanism 42 has a configuration similar to a conical clutch, and the gear 31 of the drive motor 31 is attached to the outer periphery.
A cylindrical body 44 having a tooth surface 44a that engages with b and a truncated conical friction surface 44b formed at the other end.
and a coupling ring 45 that fits into the truncated conical friction surface 44b, and the coupling ring 45 is inserted into one side of the driven shaft 46 and fixed thereto.

The driven shaft 46 is rotatably supported by bearings 47a attached to a partition wall 36a that divides the housing body 36 into two and a lower outer wall 36b, with one side to which the coupling ring 45 is fixed facing the drive motor 31 side. and a worm gear 4 on the other side.
8 is installed through it.

On the other hand, the cylindrical body 44 penetrates the driven shaft 46 from one side and is rotatably supported by the shaft 46, and
The friction surface 44 of the cylindrical body 44 is rotated by the coil spring 49.
b is brought into pressure contact with the friction surface 45b of the coupling ring 45 corresponding to b.

One housing body 36 and another housing body 37
are integrally fixed, and both housing bodies 3
A transmission shaft 40 is rotatably supported by bearings 50a, and extends between the transmission shafts 6 and 37. A transmission gear 40a meshes with the worm gear 48 on the transmission shaft 40 located in one housing body 37, and a transmission gear 40a meshes with the gear 51 fixed to the main shaft 32 on the transmission shaft 40 located in the other housing body 37. A worm gear 40b is attached thereto, and is configured to transmit the rotation of the drive motor 31 to the main shaft.

Reference numeral 43 denotes a control mechanism for regulating the rotational angle range of the support shaft 32, which includes a disc-shaped control plate 52 fixed through the base end of the support shaft 32, and a control mechanism fixed to the lower end of the other housing body 37 to support the tip side. Regulation plate 5 extending toward the shaft 32 side
3.

The control plate 52 has a tongue piece 52a that extends downward from a part of the lower surface of the disc-shaped outer periphery, and the tip of the tongue piece 52a is positioned in the U-shaped groove 53a of the regulation plate 53.

The regulating plate 53 is connected to the housing body 3 as shown in FIG.
7, the front end extending toward the support shaft 32 is branched into a U-shape, and the side wall 53
b, 53c Angle adjustment screws 54a, 5 that face each other and pass through to the inner U-shaped groove 53a.
Attach 4b. 55 is the screw 54a, 54
This is the nut that fixes b.

Next, a cutting method using this configuration will be explained.

Rotate the arm mechanism 30 toward the fixed blowpipe 25,
After the tongue piece 52a of the control plate 52 is brought into contact with the inner surface of one side of the side wall 53c of the regulation plate 53, the dial 33
The horizontal arm 33 is extended or shortened by operation a, and the starting point and return position are set so that the horizontal blowpipe 29 is located on the imaginary cutting line of the fixed blowpipe 25.

In addition, when setting the above position, it is preferable that the angle β of the arm mechanism 30 with respect to the horizontal beam 20 is set in the range of 0 to 45 degrees.

Next, the arm mechanism 30 is rotated to the side opposite to the fixed blowpipe 25, and the tongue piece 52a of the control plate 52 is moved to the regulating plate 53.
After bringing it into contact with the inner surface of the other side wall 53b, the angle adjustment screw 54a is rotated to adjust the rotation angle range α of the transverse blowpipe 29.

In addition, in the opposite manner to the above operation method, the arm mechanism 30 is rotated to the side opposite to the fixed blowpipe 25, and the tongue piece 5 of the control plate 52 is rotated.
2a is brought into contact with the other side wall 53b and the inner surface of the regulating plate 53, the support stand 26 is moved on the horizontal beam 20 to set the horizontal blowpipe 29 at a predetermined position, and then the arm mechanism 30 It is also possible to adjust the rotation angle range α by returning the rotation angle to the fixed blowpipe 25 side and adjusting the angle adjustment screw 54b and the horizontal arm 33 when positioning the starting point and return position. Therefore, the angle adjustment screws 54a, 54b do not necessarily have to be attached to both side walls 53b, 53c of the liner, and the angle range can be easily adjusted even if they are attached only to either the left or right side.

Next, the setting of the timer of the control circuit will be explained. The setting time of one timer, that is, the timer for setting the time for the rotation of the drive motor 31 to reverse, is set to be longer than the rotation time of the cross blowpipe 29.
Another timer, ie, a timer for setting the time for the drive motor 31 to rotate forward, is set to the time for the cross blowpipe 29 to start rotating again.

After performing such setup settings, the cutting operation is started.

First, as the horizontal beam 20 moves forward, the fixed blowpipe 25, which moves following the horizontal beam 20, starts cutting the steel plate side end 15a.

Then, according to a command from the control circuit, the horizontal blowpipe 29
At the same time, the drive motor 31 rotates and transmits rotation to the cylindrical body 44 via the gear 31. Since the cylindrical body 44 is pressed against the coupling ring 45 side by a coil spring 49, both members 44,
The rotation of the cylindrical body 44 is transmitted to the coupling ring 45 by the frictional force of the driven shaft 46 and the transmission gear 40.
a - Transmission shaft 40 - Worm gear 40b and gear 5
Rotation is applied to the support shaft 32 via the shaft 1. Support shaft 32
When the arm mechanism 30 rotates, the arm mechanism 30 rotates about the support shaft 32, and the cross blowpipe 2 attached to its tip rotates.
9 starts ear cutting.

On the other hand, when the rotation of the support shaft 32 reaches a predetermined angle α, the tongue piece 52a of the control plate 52, which is rotating following the rotation of the support shaft 32, is attached to the other regulating plate side wall 53c. Angle adjustment screw 54b
is pressed to stop the rotation of the support shaft 32 and the rotation of the arm mechanism 30 connected to the support shaft 32.

Then, by stopping the rotation of the support shaft 32, the transmission shaft 4
0 and the driven shaft 46, the rotation of the coupling ring 45 is also stopped. On the other hand, the cylindrical body 44 which is in pressure contact with the friction surface of the coupling ring 45 is directly connected to the drive motor 31 via a gear, so that the rotation of the coupling ring 45 is stopped. body 4
4 continues to rotate while spinning idly against the frictional force. Therefore, even if the spindle 32 stops rotating, no extra load is applied to the drive motor 31.

After a certain period of time has elapsed, a command (timer) from the control circuit causes the cross blow pipe 29 to stop supplying cutting oxygen and rotate the drive motor 31 in the reverse direction. Then, the rotation of the cylindrical body 44 is coupled to the coupling 45 by the reverse rotation of the drive motor 31.
- Driven shaft 46 - Transmission gear 40a - Transmission shaft 40 - Support shaft 32 via worm gear 40b and gear 51
, the horizontal blowpipe 29 attached to the tip of the arm mechanism 30 starts to return with the support shaft 32 as a fulcrum, and the tongue piece 52a of the control plate 52 is turned to the angle adjustment screw 54a or the regulation plate on the return side. When the horizontal blowpipe 29 rotates until it comes into contact with the side wall 53b and returns to its normal position, the cylinder body 44 rotates idly while the horizontal blowpipe 29 is cut off by a command (timer) from the control circuit and the supply of oxygen is stopped. make it stop.

Thereafter, by repeating this process, intermittent and automatic ear cutting is performed.

As is clear from the above description, in the present invention, one member connected to the drive motor and another member connected to the support shaft are brought into contact with each other, and the rotation of the drive motor is controlled by the frictional force between the two members. A slip mechanism is interposed between the drive motor and the spindle, and the rotation angle of the spindle is controlled by a control plate fixed to the spindle and a regulation plate that adjustably regulates the rotation range of the control plate. Since the range can be regulated, the rotation angle range of the cross blowpipe can be easily and freely adjusted without applying any extra load to the drive motor 31. In particular, the present invention is designed to adjust the rotation angle range within the above-mentioned angle range. Since the adjustment is made mechanically visible without being electrically controlled, the adjustment can be performed easily and accurately.

Furthermore, according to the present invention, the cross blowpipe can be accurately and reliably returned to its original position without wobbling, thereby preventing the risk of accidentally melting the inner end of the steel plate during return. .

Since the gas cutting device for ear cutting according to the present invention is constructed separately from the main gas cutting device, it can be easily attached to an existing cutting device, and maintenance work is also extremely easy.

It has various effects such as

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing a side edge gas cutting device for steel plates, etc. according to the prior art, and FIGS. 2 to 6 all show embodiments of the present invention. A schematic plan view of the device installed above, Figure 3 is its front view, Figure 4 is an enlarged view taken along line A-A' of Figure 3 with a portion cut away to show the slip mechanism, and Figure 5 shows the transmission mechanism. B- in Figure 3 with a part cut away
FIG. 6 is an enlarged view taken along the line B' and a bottom view taken along the line C-C' of FIG. 15; Steel plate, 29; Transverse blowpipe, 30; Arm mechanism, 32; Support shaft, 31; Drive motor, 42; Slip mechanism (both members 44 and 45), 52; Control plate,
53; Regulation board.

Claims (1)

[Scope of utility model registration request] A horizontal blowpipe for removing the ear at the end of the steel plate, an arm mechanism that holds the horizontally expandable and retractable horizontal blowpipe, a support shaft that supports the arm mechanism, and a rotational force applied to the support shaft, In a gas cutting device for ear cutting that includes a drive motor that rotates an arm mechanism via a support shaft, one member connected to the drive motor and another member connected to the support shaft are brought into contact with each other, and both of the members are connected to each other. A slip mechanism that transmits the rotation of the drive motor to the support shaft by frictional force between members is interposed between the drive motor and the support shaft, and a control plate fixed to the support shaft and the rotation range of the control plate are adjusted. 1. A gas cutting device for removing an edge of a steel plate side edge, characterized in that the rotation angle range of a support shaft can be regulated by a regulation plate that regulates the rotation angle range of a support shaft.