JPS59194899A - Method of exchanging pen in automatic drawing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pen exchange method between a pen holding mechanism on the head side and a pen holding mechanism on the main body side in automatic drafting.

In this type of pen exchange method, as shown in the flowchart of FIG. Push the pen into the pen holding mechanism on the main body side, and let the pen holding mechanism on the main body hold the pen.

When the pen holding mechanism on the main body side holds the pen, the solenoid is driven to lock the pen holding state of the pen holding mechanism on the main body side. Next, move the cursor to the next command point. This movement of the cursor releases the pen from being held by the pen holding mechanism on the head side. Next, the power to the solenoid is removed.

As mentioned above, if the pen held in the pen holding mechanism on the head side is held in the pen holding mechanism on the main body side and then the pen holding mechanism on the main body side is locked, it will take time to replace the pen. However, when attempting to do this quickly, there was a drawback in that it was extremely difficult to set the timing of the lock signal.

The purpose of the present invention is to eliminate the above-mentioned defects, and when pushing the pen held by the pen holding mechanism on the head side into the pen holding mechanism on the main body side, the head side pen holding mechanism When located near the mechanism, the pen holding mechanism on the main body side is locked, that is, the pen holding force of the mechanism is made greater than the pen holding force of the head side pen holding mechanism,
The present invention is characterized in that the pen held in the head side pen holding mechanism is pushed into the holding position of the main body side pen holding mechanism by the driving force of the cursor against this force.

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

2 is an X-Y plotter, and both sides 4a, 4 of the main body 4
A rail 6 is supported so as to be movable along the Y-coordinate axis direction, and a cursor 8 is movably attached to the rail 6. A head 10 is attached to the cursor 8. The movement of the rail 6 along the Y coordinate axis direction and the movement of the cursor 8 along the rail 6 along the X coordinate axis direction are controlled by a known X-coordinate axis direction, which is controlled by a computer (not shown).
Controlled by Y numerical control mechanism. The head 10 is provided with a pen holding mechanism which will be described later. 12 is the drawing board 14
This is the top plate of eight drawing board side pen holding mechanisms provided in the main body 4, located on one side of the main body 4.

Next, the pen holding mechanism on the cursor side will be explained with reference to FIGS. 2 to 4.

Reference numeral 20 denotes a pen up/down solenoid fixed to a board fixed to the cursor 8, and is driven by a pen up/down signal from the computer.

The output shaft of the solenoid 20! lr() The lifting plate 22 is fixed. 24 is a swinging arm supported by a shaft 26 on the lifting plate 22 so as to be rotatable in a plane parallel to the surface of the drawing board 14. A pen holding portion 24a consisting of a concave curve is formed in the pen holding portion 24a. Reference numeral 28 is a holding frame fixed to the elevating plate 22, and the pen holding portion 24a is horizontal to the surface of the drawing board 14 and is attached to the rail 6.
An upper holding piece 28a and a lower holding piece 28b are formed in a direction perpendicular to the longitudinal direction. A pen contacting surface 28c is formed on the holder 28 and is perpendicular to the surface of the drawing board 14 and parallel to the longitudinal direction of the rail 6. A recessed portion is formed in the upper holding piece 28a and the body portion of the holder 28 to receive a plate 32 that is fitted and fixed to the body portion of the pen 30. A hole is transparently provided in the holding body 28, and a shaft 34 is slidably disposed in the hole.
The rear end of the rear end is in elastic contact with the operating shaft of the limiter 1 switch 36 fixed to the elevating plate 22 via a bracket. The resiliency of the actuating shaft urges the shaft 34 so that its tip protrudes into the recessed portion of the body portion of the holder 28 .

A slide ball bearing 40 is fixed to the elevating plate 22, and the bearing 40 is slidably inserted into a vertical guide shaft 42 fixed to the base plate of the head 10 and the cursor 8. Further, a guide roller 44 rotatably supported by the elevating plate 22 is connected to the board of the header 0 and the cursor 8.
It is in elastic contact with a vertical guide column 46 fixedly attached to the vertical guide column 46 by the tensile force of a return spring 48.

A coil spring 48 is compressed and arranged in a spring holding hole formed in the rising portion of the swinging arm 24 and a spring holding hole formed in the holding body 28.
Due to the elastic force of 8, the swinging arm 24 moves around the axis 26,
In FIG. 2, it is biased in the direction of rotation of the hour hand.

Next, the pen holding mechanism 12 on the main body 4 side will be explained with reference to FIGS. 5 to 8.

50 is a base fixed to the main body 4, and the drawing board 14 is fixed to this base. A plurality of cylindrical bodies 52 are erected on the base 50, and a cylindrical resin holder 54 is slidably fitted into the cylindrical bodies 52 by being biased upward by the elasticity of the coil spring 5G. A protrusion 58 provided on the holder 54 protrudes to the outside through a long hole (not shown) in the cylindrical body 52, and the protrusion 58 is applied to a force 1160 rotatably supported on the base 50 via a bracket. are in contact with each other. The cam 60 is locked to a shoulder member 62. An annular body 64 made of rubber is attached to the upper end of the holder 54.
is fixed. Reference numeral 66 denotes an elevating body disposed in the holder 54, and a presser foot 68 made of rubber is fixed to the tip of a shaft fixed to this. A protrusion 72 is fixed to the lower part of the holder 28 at a position where it contacts the elevating body 54. Reference numeral 74 denotes an upper holding piece fixed to the base 50 via a support, and the holding piece has a contact surface 74a formed in a direction perpendicular to the rail 6 and perpendicular to the surface of the drawing board 14. There is. Reference numeral 76 denotes an upper holding piece, which is fixed to the base 50 via a support. The upper holding piece 76 has a contact surface 76a for contacting the peripheral surface of the body of the pen 80 and a contact surface 76 for contacting one side of the body of the pen 30.
b is formed. The upper holding pieces 74 and 76 face each other in a direction perpendicular to the drawing board 14 with an interval slightly wider than the thickness and width of the board 32 of the pen 30. Reference numeral 80 denotes a swing arm, and a hook portion 80a is formed at the tip of the swing arm.

The swinging arm 80 is supported by a shaft 84 on a mounting plate 82 so as to be rotatable in a plane parallel to the plane of the drawing board 14. 86 is a lower holding piece fixed to the base 50, and the upper holding piece 7
6, a contact surface 86a for contacting the circumferential surface of the body of the pen 30 and a contact surface 86b for contacting the side surface of the body are formed. The swing arm 80 is biased in the open rotation direction in FIG. 8 about the shaft 84 by the tensile force of a coil spring 88. The rear end of the swing arm 80 is attached to the base 50 via a bracket (d
It is in elastic contact with the switch piece of the limit switch 9o, which has been kicked off. A solenoid 92 is fixed to the base 5o via a bracket, and one end of a shaft rod 94 is fixed to the output shaft of the solenoid. The other end of the shaft 94 is slidably supported on the base 50 by a bearing 96.

The shaft rod 94 is slidably inserted into the hole of the swing arm 8o, and a stopper plate 96 attached to the shaft rod 94 is inserted into the hole of the swing arm 8o.
facing each side of o.

Eight pen holding mechanisms on the main body side are provided, with the solenoid 92 and the shaft rod 94 being common parts. The main body 4
A rail detection element 91 consisting of a limit switch is disposed near one end of one side portion 4b, and the element 91 is connected to a controller. When the pen holding mechanism on the head side approaches the pen holding mechanism on the main body 4 side and the cursor 8 crosses over the pen position 1 assumed on the drawing board 14,
The position of the detection element 91 is set so that one end of the rail 6 operates the detection element 91 while crossing the rail 6. When a predetermined location of the cursor is located at the point of the pen chain point, the head side pen holding mechanism is set at a position opposite to the main body side pen holding mechanism with a predetermined distance therebetween. Holding pieces 28a, 28. of the pen holding mechanism on the head 10 side. b is the holding piece 74 of the pen holding mechanism on the main body side.
, 713.86, and the swinging arm 26 corresponds to the swinging arm 8o. These mechanisms corresponding to each other are arranged symmetrically, and this symmetrical arrangement allows the pen holding mechanism on the head 1o side to be moved until it is located within the pen holding mechanism on the main body side.

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG.

When the pen exchange signal is input to the input device of the calculator, the calculator turns the limit switch 36 ON', OFF
Depending on the state, the pen holding mechanism on the head 10 side may
Determine whether or not it holds. When the pen holding mechanism on the head 10 side is holding the pen 30, the limit switch 90 is turned on to check whether the pen is held in the pen holding mechanism on the body side having the designated number.

Judgment is made based on the OFF state. The computer outputs a command to the numerical control mechanism to move the cursor 8 to the pen position in front of the pen holding mechanism on the main body side with the designated number. When the cursor 8 moves to the pen position in front of the specified pen holding mechanism on the main body side, the detection element 91 operates and outputs a detection signal, and based on this detection signal,
The computer issues a drive command to the solenoid 92. As a result, the solenoid 92 is driven, the shaft rod 94 moves to the right in FIG. is locked by.

Next, the computer drives the rail 6 to move the cursor 8 toward the body-side pen holding mechanism with a predetermined number. Due to this movement, the projection 72 lowers the cam plate 60 and lowers the holder 54, as shown in FIG. on the other hand,
Pen 30 held by the pen holding mechanism on the head 10 side
The claw portion 80 of the swinging arm 80 is moved by the driving force of the cursor 8.
a, and due to this pressing force, the swinging arm 80 raises the claw portion 80a as shown in FIG. is pushed between the contact surfaces 74a, 76b and 86b of the swing arm 80 and the side surface of the swing arm 80. At this time, the upper and lower surfaces of the board 32 of the pen 30 are connected to the upper holding pieces 74 and 7.
It is located between 6 and 6. As a result, the pen 30 is
It is held by both the pen holding mechanism on the 0 side and the pen holding mechanism on the main body 4 side. Next, the computer issues a command to the numerical control mechanism to cause the cursor 8 to return in the direction of the pentagonal input direction. When the cursor 8 moves in the direction of the pen shift point, the swinging arm 26 on the head 10 side swings about the shaft 26 in the counterclockwise direction of rotation of the hour hand in FIG. 28 and the swinging arm 26 are released. When the cursor 8 returns to the pen position, the detection element 90 is activated, the solenoid 92 is turned off, and the swing arm 80 comes into elastic contact with the side surface of the pen 3o due to the tensile force of the coil spring 88.

The ρ1 rotation torque of the swinging arm 8° caused by the coil spring 88 is set to be weaker than the rotational torque of the swinging arm 24 caused by the coil spring 48 on the head 1o side. Next, the computer moves the cursor 8 to point 1- of the next command. Next, when a pen exchange signal is input to the computer, the computer determines whether or not the head 10 is holding the pen based on the signal from the limit switch 3G. When the head 10 does not hold a pen, the switch 90 is turned ON to see if there is a pen in the designated pen holding mechanism on the body side.

Judgment is made based on the OFF state. When there is a pen in the specified pen retaining/holding mechanism on the main body side, the cursor 8 is moved to the pen position point with the specified number. Next, the cursor 8 is brought close to the designated pen holding mechanism on the main body side, and the holding piece 28a28b and the swing arm are placed on both sides of the pen 30 held on the pen holding mechanism side on the main body against the elasticity of the spring 48. 24, and the pen 30 is held by the head-side pen holding mechanism. At this time, the plate 32 of the pen 30 is located within the recessed portion of the holding piece 28a. Next, when the cursor 8 is moved to the pen position point, the pen 30 is moved by the elastic force of the swinging arm 24 against the pen 30.
The holding pieces 74, 7 resist the elastic locking force of the claw portion of the swinging arm 80.
6°86 and the swinging arm 80 is released from the holding state.

The head 10 moves to the next command +1 point while holding the pen. Note that when the head 10 separates from the pen holding mechanism on the main body side, the pressing force of the protrusion 72 against the sword plate 60 is released, the holder 54 is raised by the elasticity of the spring 56, and the pen 3 is held by the ring body 64 and the rubber body 68.
The tip of the 0 is sealed, which prevents the nib from drying out. Incidentally, FIG. 12 shows another embodiment of the circuit for driving the solenoid 92. A desired limit switch among the limit switches 90 is selected by a command from the controller and connected to the line L2.

In the NAND circuit 100, all three input terminal levels are “H4”.
gh”, the drive circuit 10 drives the solenoid 92.
A drive signal is output to 2.

When the switch 36.90 and the detection element 91 are ON, their outputs are "Low", and when they are OFF, their outputs are 'High'.
In the above configuration, when the switch 36 is ON, that is, the head-side pen holding mechanism is holding the pen, and the selected switch 90 is OFF, the detection element When 91 turns ON,
from the NAND circuit 100 to the solenoid drive circuit 102.
A low solenoid drive signal is output.

Note that the detection element 91 may be an output terminal of a preset counter of a numerical control mechanism. This counter counts the amount of movement of the cursor 8 in the Y coordinate axis direction, and when the Y cursor 8 crosses the pentency point, the NAND circuit 1
A "High" signal is supplied to the input terminal of 00.

As described above, in the present invention, before pushing the pen of the head side pen holding mechanism into the pen holding position of the main body side pen holding mechanism, the pen holding force of the main body side pen holding mechanism is set to be higher than the pen holding force of the head side pen holding mechanism. The pen head is set strongly, and the driving force of the cursor is used to force the pen into the pen holding position of the pen holding mechanism on the main body side, against the pen holding force of the pen holding mechanism on the main body side. This has the advantage that the side pen holding mechanism can be quickly replaced with the main body side pen holding mechanism.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the X-Y plotter, Fig. 2 is a plan view,
Fig. 3 is a side view, Fig. 4 is a sectional view, Fig. 5 is a side view, Fig. 6 is a side view, Fig. 7 is a front view of the pen holding mechanism on the main body side,
Fig. 8 is a sectional view, Fig. 9 is an explanatory drawing, Fig. 10 is an explanatory drawing,
FIG. 11 is a flowchart 1 to FIG. 12 is a circuit diagram of another embodiment, and FIG. 13 is a flowchart of a conventional method. 2...X-Y plotter, 4...Main body, 6...
...Rail, 8...Cursor, 10...Head. 14... Drawing board, 20... Solenoid, 22 Lifting plate, 24... Rocking arm patent applicant Muto Kogyo Co., Ltd. Representative Patent Attorney Aya Nishijima Figure 2 Figure 3 μ Figure 4

Claims (1)

[Claims] ■ Push the pen held by the pen holding mechanism on the head side with a predetermined pen holding force into the pen holding position of the pen holding mechanism on the main body side using the driving force of the head, and push the pen holding force of the pen holding mechanism on the main body side. is larger than the pen holding force of the pen holding mechanism on the head side, and by driving the head in a direction away from the pen holding mechanism on the main body side, the pen holding state on the head side is changed to the pen holding force of the pen holding mechanism on the head side. In the pen exchange method, the pen holding force of the main body side pen holding mechanism is changed to the head side before the pen held by the head side pen holding mechanism reaches the main body side pen holding mechanism. The pen holding force is set to be larger than the pen holding force of the pen holding mechanism, and then the driving force of the head moves the pen held in the head side pen holding mechanism to the pen holding position of the main body side pen holding mechanism. A method for replacing a pen in automatic drafting, characterized in that the pen is pushed in against the pen holding force.