JPS5941814B2 - Long material supply positioning device - Google Patents

Description

[Detailed Description of the Invention] a) Description of the Technical Field The present invention relates to a long material supply and positioning device used when drilling holes in long steel materials such as rails, and grooving the ends thereof. It is.

b) Description of the Prior Art Generally, when automatically processing a long steel section into a predetermined shape and size, it is necessary to supply the steel section to a section processing device and to position it by stopping it at a predetermined position.

Conventionally, in this method, the tip of the steel section is brought into contact with a mechanical stopper, and a detector such as a limit switch detects that the tip of the steel comes into contact, and a brake device is activated. The rotation of the roller was stopped. However, in this method, the tip of the steel material is brought into contact with the stopper at a considerable feed rate, so a considerable impact is applied, deforming the stopper, and causing the steel material to bounce back and forth upon contact. For this reason, it has been impossible to position the steel material at a predetermined position determined by the stopper with high precision. c) Object of the Invention An object of the present invention is to provide a relatively inexpensive elongated material supply and positioning device that enables highly accurate positioning without deforming the stopper.

d) Structure of the invention The present invention will be explained below based on an illustrated embodiment.

In FIG. 1, reference numeral 1 denotes a supply roller device, which is arranged in a supply path to a processing device 5, and supplies a long material, for example, a long shaped steel material 2, along its longitudinal direction.

This processing device 5 has a stopper 3 that stops the long material 2 at a predetermined position, and processes the shaped steel material 2 into a predetermined shape and size at a predetermined position determined by the stopper 3. 6
1 is a force Loe jig device having a clamping device, which is incorporated into the processing device 5 and holds the supplied section steel 2 so as to be suitable for processing.

T is an intermediate position detector which detects when the shaped steel material 2 has been supplied close to the stopper 3 and sends a positioning start command to the supply roller device 1. Reference numeral 8 denotes a discharge roller device which discharges the shaped steel material 2 from the processing device 5 after completion of a predetermined processing.

FIG. 2 is a perspective view of the supply roller device 1 shown in FIG. The guide roller 12 is a supply roller for supplying the section steel material 2, and both of these rollers 11 and 12 are connected to the sprocket 2.
2.25, and receives rotational force from a drive mechanism described later. Reference numeral 13 denotes side rollers that guide the shaped steel material 2 in the lateral direction.

14 is a drive motor with a reduction gear; 15 is a tension type clutch which can adjust the transmitted torque by changing the input control potential and can be used in a continuous slip state.

In addition to the tension clutch, this type of clutch includes a hysteresis clutch, a powder clutch, and the like, but the tension clutch will be exemplified here as described above. The tension clutch 15 is installed on the frame 10, and its input shaft has a sprocket opening 9 between it and the bearing, and is connected to a sprocket 18 provided on the rotating shaft of the first drive motor 14 via a chain 20. do. Reference numeral 17 is the output shaft of the tension clutch 15, and has two sprockets 21 and 24 between it and a bearing provided at the tip.

These two sprockets 21 and 24 are connected to sprockets 22 and 25 of the supply guide roller 11 and supply roller 12 via chains 23 and 26, respectively, and apply rotational force to them. Here, both the rollers 11 and 12 are
The rotational force of the drive motor 14 is received through the tension clutch 15, etc., and the transmitted torque can be freely changed according to the control voltage applied to the tension clutch 15 by slipping inside the tension clutch 15. I can do it.

FIG. 3 is a perspective view of the stopper 3 shown in FIG. 1, viewed from the direction of arrow B.

In the figure, 4 is a non-contact detection method, such as a proximity switch,
A tip detector such as a photoelectric switch is embedded in the stopper 3 and detects when the tip of the shaped steel material 2 comes into contact with the stopper 3. 27 is a stopper rotation shaft to which the stopper 3 is firmly fixed, and is attached to the processing jig device S.
When machining the shape steel material 2 and when discharging it after machining is completed, the shape steel material 2
Rotate and move from the tip.

]) A force machining device 5 for machining the working section steel material 2 of the invention into a predetermined shape and size.
When supplying the section steel material 2 into the processing jig device 6, the drive motor 14 with a reduction gear in the supply roller device 1 is driven, and at the same time, the tension clutch 15 is excited with a set supply voltage (high voltage).

One drive torque input from the drive motor 14 to the tension clutch 15 is transmitted to the supply guide roller 11 and the supply roller 12 by a rotational torque corresponding to the set voltage.
Start supplying the shaped steel material 2. That is, tension clutch 1
No. 5 has a control excitation voltage set high as described above, so it transmits high rotational torque with little internal slippage. When the intermediate position detector 7 detects that the steel section 2 has been supplied close to the stopper 3, its detection output changes the excitation voltage of the tension latch 15 to the positioning voltage (while driving the drive motor 14). low voltage).

By this switching, the tension latch 15 transmits low rotational torque to the supply guide roller 11 and the supply roller 12. Therefore, the steel section 2 is supplied with low torque and contacts the stopper 3 at low speed. Immediately after the shaped steel material 2 contacts the stopper 3, the shaped steel material 2 inevitably bounces back and forth, so after the tip detector 4 confirms that the tip of the shaped steel material 2 has contacted the stopper, low torque is supplied for several seconds. Configure the control circuit so that it does not stop.

At this time, the tension clutch 15 continuously slips because a load greater than the rotational torque is applied to the supply guide roller 11 and the supply roller 12.

For this reason, the rotation of the supply guide roller 11 and the supply roller 12 is stopped, but the steel section 2 is held at the stopper 3 with a constant force.
It acts like a force. Therefore, when the tip of the shaped steel material 2 separates from the stopper 13 due to bounce, the supply guide roller 11 and the supply roller 12 rotate again and the shaped steel material 2
Bring the tip of the button into contact with the stopper 3.

Also, when the shaped steel material 2 bounces, the tip detector repeats on and off, but if the tip of the shaped steel material 2 remains in a static state in contact with the stopper 3 for more than a certain period of time, a continuous detection signal is sent from the tip detector. This detection signal causes the supply operation to be stopped and the positioning supply to be completed. In this case, the contact force against the stopper 3 can be easily changed by adjusting the transmission torque of the tension clutch 15.

Furthermore, the feeding speed of the section steel material 2 during positioning can be similarly adjusted. That is, when the transmitted torque is reduced, the tension clutch 15 continuously slips, resulting in a decrease in the supply speed. In the above embodiment, when the transmission torque of the tension clutch 15 is switched to a low torque based on the detection signal of the intermediate position detector 7, the rotational speed of the drive motor remains unchanged. It is also possible to further weaken the impact force when the section steel material 2 comes into contact with the stopper 3 by switching the rotational speed from high to low.

g) Overall effect Since the present invention is constructed as described above, it is possible to feed a long material such as a shaped steel material without damaging the surface or tip portion, and the stopper device can be deformed by a large collision force. Moreover, it is possible to supply and position a long material with high precision at a relatively low cost.

In addition, in order to issue a positioning completion command after confirming that the tip of the long material is in continuous contact with the stopper, some people mistakenly clamp and process the steel section when the tip of the section is far from the stopper. There's nothing to do. Furthermore, if the tip of a long material gets caught in a processing jig or the like during feeding, the clutch continuously slips, which has the advantage of protecting the drive motor.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a long material supply and positioning device according to the present invention, FIG. 2 is a perspective view of a supply roller device used in the present invention, and FIG. 3 is a perspective view of a stopper used in the present invention. be. 2... Long material, 3... Stopper, 4.
... Tip detector, 5 ... Processing device, 7.
...Intermediate position detector, 11, 12... Supply roller, 14... Drive motor, 15...
...Clutch.

Claims (1)

[Claims] 1. A supply roller that supplies the long material in a fixed direction, a clutch that is provided between the supply roller and the drive motor and can arbitrarily control and adjust the transmitted torque by an internal sliding action, and a supply roller that supplies the long material in a fixed direction. a stopper that comes into contact with the tip of the long material and stops it at a predetermined position; and a stopper that is arranged in the supply path of the long material and detects that the long material is supplied near the stopper and transmits the information to the clutch. An intermediate position detector that emits an output to reduce torque, and a tip detector that detects that the tip of the long material has come into contact with a stopper, and the detection output of the tip detector continues for a certain period of time or more. A long material supply positioning device configured to stop the supply operation under the condition that: