JP4483033B2 - Arrangement structure of origin detection sensor in cutting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an arrangement structure of an origin detection sensor that detects an origin of a carriage having a cutter in a cutting machine.
[0002]
[Prior art]
Generally, when a cutting machine cuts out characters or figures from a cutting sheet, the origin of the carriage (cutter) is detected in advance, and when controlling the position of the carriage, the amount of movement to that position is grasped based on the origin. The amount of rotation of the drive motor is controlled. For this purpose, it is necessary to detect the origin position of the carriage when the power is turned on. A sensor lever is provided on the carriage, and the origin is detected so that it can be determined that the carriage has returned to the origin by detecting the sensor lever on the machine body. A sensor is provided.
[0003]
[Problems to be solved by the invention]
However, in the above-described cutting machine, once the origin is detected, it is not necessary to detect the origin unless the power is turned off, so that the sensor lever does not interfere with the origin detection sensor (does not collide) when starting a normal cutting operation. In addition, since the carriage movement start point must be set to a position moved by a predetermined amount from the origin, the entire width of the cutting machine has to be widened by that space.
[0004]
The present invention eliminates the above problems and eliminates the need to provide a space for releasing a sensor lever provided for detecting the origin of the carriage, and the arrangement structure of the origin detection sensor in the cutting machine can reduce the size of the apparatus. The issue is to provide.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the arrangement structure of the origin detection sensor in the cutting machine according to the present invention is that a strip-shaped cutting sheet that moves in the X-axis direction is cut by a cutter that moves in the Y-axis direction and the Z-axis direction. In a cutting machine that cuts into a shape, a Y-axis shaft is arranged in the Y-axis direction on the cutting sheet, and a carriage with a cutter attached to the tip of the Y-axis shaft is slid along the Y-axis shaft in the Y-axis direction. A sub-shaft parallel to the Y-axis shaft is provided so as to pass through the leading end side of the carriage, and both ends of the Y-axis shaft and the sub-shaft are connected and fixed via connecting frames to form a frame assembly. The carriage is provided with a sensor lever that protrudes in the direction of the origin, and the carriage is provided on the connection frame. An origin detection sensor that detects the sensor lever when moved in the direction of the point is disposed, and the sub-shaft is moved up and down by an elevating means to swing the frame assembly up and down around the Y-axis shaft. The cutting sheet is moved up and down in the Z-axis direction, and the origin detection sensor and the carriage are moved up and down in synchronization.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 is a perspective view of a main part of the cutting machine, FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a plan view thereof. In the figure, reference numeral 1 denotes a machine main body, a sheet guide surface 3 having a central portion formed in a mountain shape is provided between the side plates 2a and 2b on both sides thereof, and a roll holder 4 is adjacent to the sheet guide surface 3. A cutting sheet 5 provided and wound in a roll shape is placed. A pair of rollers 6 are arranged on the roll holder 4 at the front and rear so that the roll is easy to rotate.
[0007]
Holes 7 are formed at equal intervals on both sides of the cutting sheet 5.
[0008]
A Y-axis shaft 8 is disposed above the sheet guide surface 3. The Y-axis shaft 8 is rotatably supported by the bearings 9a and 9b of the left and right side plates 2a and 2b, and both ends 8a of the Y-axis shaft 8 projecting outside through the bearings 9a and 9b are formed in a D-shaped cross section. Has been. A sub-shaft 10 is disposed on the downstream side of the Y-axis shaft 8, and the sub-shaft 10 also protrudes outside through the long holes 11 of the side plates 2a and 2b. Then, both ends of the Y-axis shaft 8 and the sub shaft 10 are connected via connecting frames 12 and 13, respectively.
[0009]
The connecting frames 12 and 13 are formed by bending plates. A set screw 15 is screwed into a bent portion 14 at the end of the Y-axis shaft 8 on the bearings 9a and 9b side, and the tip of the set screw 15 is connected to the Y-axis shaft 8. Is engaged with the flat portions 16 at both ends of the plate to prevent rattling. Further, both ends of the sub shaft 10 are fixed to the other ends of the connecting frames 12 and 13. As described above, the Y-axis shaft 8, the sub-shaft 10, and the connection frames 12 and 13 are fixed to each other and formed as a rectangular frame assembly A as a whole.
[0010]
Next, a carriage 17 is provided on the Y-axis shaft 8 so as to be slidable along the Y-axis shaft 8. The carriage 17 engages with the Y-axis shaft 8 via a slide bearing or a slide bush, and a cutter 19 is attached to the tip of the carriage 17 via a cutter holder 18. The sub shaft 10 passes through the carriage 17, and the carriage 17 is slidable along the sub shaft 10. The carriage 17 is operatively connected to a servo motor (not shown) via a wire 20. The sub shaft 10 also serves as a sub guide for the carriage 17 to move in the Y-axis direction.
[0011]
One end of the subshaft 10 is connected to a solenoid 22 via an adjustment frame 21, and the subshaft 10 is always biased by a return spring 23 so as to be at the upper end of the long hole 11. When the solenoid 22 is turned on, the sub shaft 10 is moved down along the long hole 11, and when the solenoid 22 is turned off, the sub shaft 10 is moved up by the return spring 23. That is, the sub-shaft 10 is moved up and down by the lifting / lowering means including the solenoid 22 and the return spring 23. Accordingly, the carriage 17 swings up and down (Z-axis direction) around the Y-axis shaft 8 and moves downward. The cutting edge of the cutter 19 abuts on the cutting sheet 5 on the sheet guide surface 3 to cut the cutting sheet 5.
[0012]
Next, openings 25 are formed on both sides of the face plate 24 constituting the sheet guide surface 3, and the outer peripheral surface 27 of the sprocket 26 disposed inside the machine body 1 is exposed from the openings 25. The sprocket 26 is rotatably supported by a support shaft 28, and protrusions 29 that engage with the holes 7 formed on both sides of the cutting sheet 5 are formed on the outer peripheral surface 27 at equal intervals with the holes 7. A sheet presser 30 is disposed inside the opening. The sprocket 26 is operatively connected to a servo motor (not shown).
[0013]
A plate-shaped sensor lever 35 is attached to the left side of the carriage 17 so as to protrude in the direction of the origin (side frame 2 a side), and an origin detection sensor 36 is fixed on the connecting frame 12 with a screw 37. The origin detection sensor 36 is constituted by a transmissive photo interrupter, and the tip of the sensor lever 35 enters the slit between the light emitting part 36a and the light receiving part 36b, thereby blocking the incident light to the light receiving part 36b. A control unit (not shown) can determine that 17 has reached the origin. In the side frame 2a, an opening 38 that is long in the vertical direction is formed so that the tip of the sensor lever 35 can penetrate the side frame 2a regardless of the vertical position of the carriage 17.
[0014]
According to the above configuration, when the power is turned on, the carriage 17 moves along the Y-axis shaft 8 toward the side frame 2a (origin side) in order to detect the origin according to the control program. As shown in FIG. 6, the tip of the sensor lever 35 penetrates the opening 38 of the side frame 2a, enters the slit between the light emitting part 36a and the light receiving part 36b of the photo interrupter 36, and enters the light receiving part 36b. When the incident light is blocked, the control unit determines that the carriage 17 has reached the origin, and controls the movement amount of the carriage 17 in the Y-axis direction with reference to the origin.
[0015]
Once the origin is detected, the control unit does not update the origin even if the sensor lever 35 enters the slit of the photo interrupter 36 and blocks the incident light to the light receiving unit 36b unless the power is turned off. ing.
[0016]
When an actual cutting operation is started, the sub-shaft 10 is moved up and down by the solenoid 22 and the return spring 23 while moving the cutting sheet 5 in the X-axis direction and the carriage 17 in the Y-axis direction, and the cutter 19 is moved in the Z-axis direction. The cutting sheet 5 can be cut into a predetermined shape by moving it up and down.
[0017]
At this time, while the cutter 19 is lowered (cutting the cutting sheet), the carriage 17 moves in the Y-axis direction toward the side frame 2a, and the sensor lever 35 passes through the opening 38 of the side frame 2a and enters the photo interrupter. Even if the photo interrupter 36 moves to a position where it interferes (collises with) 36, the photo interrupter 36 is fixed on the connecting frame 12, and its vertical position moves in synchronization with the vertical movement of the carriage 17. The state which can enter into the slit of the photo interrupter 36 can be maintained (refer Fig.7 (a) (b)).
[0018]
As described above, since the carriage 17 and the origin detection sensor (photo interrupter) 36 are arranged on the frame assembly A, the vertical movements of the carriage 17 and the photo interrupter 36 are always synchronized, and the cutting edge of the cutter is the cutting sheet 5. As shown in FIG. 6, even if the sensor lever 35 penetrates the side frame 2a, the tip of the sensor lever 35 always emits light without interfering with the photo interrupter 36. Since it enters the slit between the light receiving portion 36b and the light receiving portion 36b, it is not necessary to provide a clearance space for the sensor lever 35 between the side frame 2a and the carriage 17 when the carriage 17 moves toward the origin direction. The lateral width can be reduced and the apparatus can be miniaturized.
[0019]
【The invention's effect】
According to the present invention, since it is not necessary to provide a space for releasing a sensor lever provided for detecting the origin of the carriage, it is possible to provide an arrangement structure of an origin detection sensor capable of reducing the size of the apparatus.
[Brief description of the drawings]
[Fig. 1] Perspective view of the main part of the cutting machine [Fig. 2] Vertical sectional view of the cutting machine [Fig. 3] Side view of the cutting machine [Fig. 4] Plan view of the cutting machine [Fig. 5] Front view of the cutting machine [Fig. FIGS. 6A and 6B are plan views of the cutting machine for explaining the movement of the carriage in the direction of the origin. FIGS. 7A and 7B are explanatory views of the relationship between the origin detection sensor and the sensor lever.
1 Machine body 5 Cutting sheet 8 Y-axis shaft 10 Sub-shafts 12 and 13 Connection frame 17 Carriage 17
19 Cutter 35 Sensor lever 36 Origin detection sensor A Frame assembly

Claims (1)

In a cutting machine that cuts a strip-shaped cutting sheet that moves in the X-axis direction into a predetermined shape by cutting with a cutter that moves in the Y-axis direction and the Z-axis direction,
On the cutting sheet, a Y-axis shaft is arranged in the Y-axis direction, and a carriage having a cutter attached to the tip is provided on the Y-axis shaft so as to be slidable in the Y-axis direction along the Y-axis shaft. A sub-shaft parallel to the shaft is disposed through the leading end side of the carriage, and both ends of the Y-axis shaft and the sub-shaft are connected and fixed via connecting frames to form a frame assembly. A sensor lever is provided protruding in the direction of the origin, and an origin detection sensor for detecting the sensor lever when the carriage moves in the direction of the origin is disposed on the connection frame, and the sub shaft is moved up and down by an elevating means. The frame assembly is swung up and down around the Y-axis shaft, and the cutter is moved in the Z-axis direction with respect to the cutting sheet. Together make descending, arrangement of the origin detection sensor in the cutting machine, characterized in that vertically moves in synchronization with the origin detection sensor and the carriage.

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