JPH06328393A - Cutter - Google Patents

Abstract

PURPOSE:To prevent accidents of a cutter head mounting member and a cutter head colliding against a hand and catching clothes by providing a control means to stop driving motion of an X-axis driving means and a Y-axis driving means at the time when a detection signal is output from an object detection means. CONSTITUTION:When an electric power switch on a control panel 6 is ON and cutting of cloth and the like is started, photo transistors 21, 22 input infrared rays radiated respectively from infrared ray LEDs 11, 12, and an output terminal is L. Hereby, when an object enters between infrared rays and the photo transistors and the infrared rays are not input to the photo transistor 21, the output terminal becomes H, this H signal is detected by a CPU, and the CPU controls to stop driving motion of a driving device of a cutter head 4 and a driving device of an arm 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting machine in which a cutter head mounted on an arm on a cutting table is driven in the X-axis and Y-axis directions.

[0002]

2. Description of the Related Art Conventionally, in this type of cutting machine, a protective cover is attached to the outer surface of the cutter head to which the cutter is attached so that the hands or clothes do not come into contact with the cutter by mistake during operation of the cutting machine. It was considered.

[0003]

However, it is impossible to completely eliminate the gap between the lower end of the protective cover and the cloth to be cut, and there is a risk that hands, clothes, etc. may enter the gap and come into contact with the cutter. there were.

Further, since the cutter head and the arm itself equipped with the cutter head operate at high speed, when the hand or clothes enter the movement range of the arm while the cutter is operating, the arm collides with the hand or the clothes are There was a risk of accidents such as being caught.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a highly safe cutting machine.

[0006]

To achieve this object, the cutting machine of the present invention is provided at least in the cutter head mounting member, and an object has entered the space around the cutter head mounting member and the cutter head. And an control means for stopping the driving operation of the X-axis drive means and the Y-axis drive means when a detection signal is output from the object detection means.

[0007]

In the cutting machine of the present invention having the above-mentioned structure, the cutter head mounting member is equipped with a cutter head equipped with a cutter for cutting cloth or the like, and the Y-axis drive means provided on the cutter head mounting member. Drives the cutter head in the Y-axis direction. Then, the cutter head mounting member itself is driven in the X-axis direction by the X-axis driving means.

Further, when the object detecting means provided on the cutter head mounting member detects that an object has entered the space surrounding the cutter head mounting member and the cutter head, and a detection signal is output from the object detecting means, The control means stops the driving operation of the X-axis drive means and the Y-axis drive means.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block diagram of the cutting machine, and FIG. 2 shows a top view of the vicinity of the cutter head. Arms 2a and 2b are provided at both the front side and the back side of the cutting table 1 on which the material A and the like are placed, with the side A in FIG. 1 as the front, and the arm drive 2a on the front side is provided at the left end. A control switch (not shown) such as a power switch is provided. Since the arm driving devices 2a and 2b are publicly known, detailed description thereof will be omitted. Hereinafter, the direction parallel to the arm driving devices 2a and 2b will be referred to as the X-axis direction, and the orthogonal direction will be referred to as the Y-axis direction.

Arm support plates 5 for supporting both ends of the arm 3 are provided on opposite surfaces inside the arm driving devices 2a and 2b.
It is provided so as to be movable in the axial direction. Each of the arm support plates 5 has a corresponding side arm drive device 2a, 2a.
It is connected to b and driven in the X-axis direction. A cutter head 4 having a cutter for cutting installed therein is installed on the arm 3 so as to project to the left. The arm 3 and the arm support plate 5 form a cutter head mounting member.

Further, as shown in FIG. 2, the arm 3 is provided on the inner surface of the front arm support plate 5 which supports the end portion of the arm 3.
A pair of left and right phototransistors 21 and 22 are provided sandwiching the phototransistor 21, and an infrared LED is provided on the inner surface of the rear arm support plate 5 at a position facing the phototransistors 21 and 22.
11 and 12 are provided.

The cutter head 4 can be moved in the Y-axis direction by a cutter head drive device 8 provided inside the arm 3, and the cutter head drive device 8 and the arm drive device 2 can be moved.
Are controlled by the CPU 7, respectively. The cutter head drive device 8 constitutes Y-axis drive means, the arm drive device 2 constitutes X-axis drive means, and the CPU 7 constitutes control means.

Next, an object detecting device 9 as an object detecting means composed of the infrared LEDs 11 and 12 and the phototransistors 21 and 22 will be described with reference to the circuit diagram of FIG.

Under normal conditions, the phototransistor 21 inputs the infrared rays emitted from the infrared LED 11, and the level of the output terminal 31 is L. When an object such as a worker's hand or clothes enters between the infrared LED 11 and the phototransistor 21, the infrared light input to the phototransistor 21 is blocked, so that the output terminal 3 of the phototransistor 21.
The level of 1 becomes H. The phototransistor 22 and the infrared LED 12 are similarly configured.

The infrared LED 11 and the phototransistor 21 are arranged on the right side in the X-axis direction with respect to the arm 3, and when the arm 3 moves to the right side in the X-axis direction, an object is present in the space around the arm 3 and the cutter head 4. Detect that an intrusion has occurred. Further, the infrared LED 12 and the phototransistor 22 are arranged on the left side in the X-axis direction with respect to the arm 3, and when the arm 3 moves to the left side in the X-axis direction, it is detected that an object has entered the movement range of the arm 3. To do.

Next, based on the block diagram shown in FIG.
The operation of the cutting machine of this embodiment will be described.

When the power switch on the control panel 6 is turned on and the cutting of the cloth or the like is started, the phototransistors 21 and 22 input the infrared rays emitted from the infrared LEDs 11 and 12, respectively, and the output terminal 31 is at L level. It has become. Here, an object enters and the phototransistor 21
When infrared rays are no longer input to the output terminal 31, the output terminal 31 becomes H, the CPU 7 detects this H signal, and controls the cutter head driving device 8 and the arm driving device 2 to stop the driving operation.

Since there is a time delay from the detection of the intrusion of the object to the stop of the arm 3 and the cutter head 4, the detection of the object is performed by the arm 3 and the cutter head as shown in FIG. 4 to X, which is the moving direction of the arm 3.
The infrared LEDs 11, 12 and the phototransistors 21, 22 must be arranged so that they are carried out at a distance d in the axial direction. This distance d is given by the following equation.

D> (t1 + t2) × s where t1 is the time delay of the output of the object detection device t2 is the time delay of the emergency stop of the arm s is the moving speed of the arm As described above, in the cutting machine of this embodiment, The detection device 9 detects the invasion of an object around the arm 3 and the cutter head 4 and is controlled so as to stop the operation when the invasion occurs, so that the hand, clothes, etc. may move while the cutting machine is operating. When the robot 3 enters the space around the cutter head 4 and the cutter head 4, the object detection device 5 quickly detects and stops the cutting operation, so that the arm 3 can be prevented from colliding with a hand or catching clothes. be able to.

In the above embodiment, one pair of infrared LED and phototransistor are arranged with the arm 3 sandwiched between them. However, in order to detect the entry of an object in a wider range, two
You may arrange | position the infrared LED of one group or more, and a phototransistor in parallel or in series at intervals.

Further, in response to the movement of the cutter head in the Y-axis direction, object detecting means may be provided on the side surface of the cutter head on the side of the arm driving device and the inner surface of the arm support plate.

Further, in order to reduce the influence of noise, a modulation signal may be given to the infrared LED, the output signal of the phototransistor may be demodulated, and the output of the object detection may be made when the demodulated signal is interrupted.

Although infrared rays are used for the object detecting device in the above embodiment, the same function can be achieved by using a laser beam or the like.

[0025]

As is apparent from the above description,
In the cutting machine of the present invention, the object detecting means detects that an object has entered the cutter head mounting member and the space around the cutter head, and when a signal is output from the object detecting means, the control means is the cutting machine. Since the operation of the cutting machine is stopped, even if a hand, clothes, etc. accidentally enter the cutter head mounting member and the space around the cutter head while the cutting machine is operating, the object detection device immediately works and the cutting operation is stopped. It is possible to prevent accidents where the cutter head mounting member and the cutter head collide with a hand or catch clothes, thereby improving safety.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a cutting machine.

FIG. 2 is a top view of the vicinity of a cutter head.

FIG. 3 is a circuit configuration diagram of an object detection device.

FIG. 4 is a block diagram of a cutting machine according to the present invention.

[Explanation of symbols]

 1 Cutting table 2 Arm drive device 3 Arm 4 Cutter head 5 Arm support plate 7 CPU 8 Cutter head drive device 11,12 Infrared LED 21,22 Phototransistor

Claims (1)

[Claims] 1. A cutter head equipped with a cutter for cutting material and the like, and a Y-axis drive means for mounting the cutter head and driving the cutter head in the Y-axis direction, which is movable in the X-axis direction. A cutter head mounting member, a cutting table on which a material or the like to be cut is placed, and an X-axis driving unit that drives the cutter head mounting member in the X-axis direction. Object detecting means provided on the head mounting member for detecting that an object has entered the space surrounding the cutter head mounting member and the cutter head; and when a detection signal is output from the object detecting means, the X
A cutting machine, comprising: a control means for stopping the driving operation of the axis drive means and the Y-axis drive means.