JPH01317791A - Automatic writing core supply apparatus in x-y plotter - Google Patents

Abstract

PURPOSE:To prevent such a state that a writing utensil stocker can not pulled out from the output shaft of a stocker rotary drive apparatus by providing a control means for driving the rotary drive apparatus in a reverse direction on the basis of the detection signal of a detection means for detecting a core supply error. CONSTITUTION:When a core is hooked on the way of falling by the erroneous operation generated in the falling of the core and positioned between a shutter mechanism and a writing utensil, a revolving arm 56 collides with said core to pass under a shutter mechanism and becomes a state incapable of revolving in the direction of a reference position. When a rotary drive apparatus 52 is driven in a forward direction on the output side thereof in such a state that the revolving arm 56 is prevented from the passage through the shutter mechanism, said apparatus 52 races with respect to the revolving arm 56 in the output side thereof against the pressing force of the connection part of the apparatus 52 and the revolving arm 56. When the quantity of rotation of the rotary drive apparatus 52 on the output side thereof from the reference position in the forward direction exceeds a predetermined value by racing, a controller CPU detects a core feed error to drive the rotary drive apparatus in the reverse direction and returns the revolving arm 56 to the reference position and the controller displays the core feed error.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an x-y plotter that automatically draws on a drawing surface using a writing instrument with a built-in consumable writing lead such as a lead lead. This invention relates to an automatic writing lead supply device.

[Conventional technology]

Japanese Patent Publication No. 56-34982 discloses that a plurality of writing leads are held in a turret-type magazine of a plotter head, a desired writing lead is pressed with a push pin and brought into contact with the drawing surface, and the writing lead is used to draw the writing lead onto the drawing surface. Turret type X-Y for line drawing
A plotter is disclosed. Also, JP-A-57-138
No. 997 discloses that a rotary writing instrument stocker, ie, a carousel, is provided on the body side, a lead cartridge in which a writing lead is inserted is held in a plurality of pen holding parts of the carousel, and a pen on the drawing head side and a pen on the carousel are held. An X-Y plotter is disclosed in which the lead cartridge can be exchanged between the cartridge and the holder.

Further, in Japanese Utility Model Application Publication No. 60-80996, a writing block provided on a drawing head is provided with a lead case.

An X-Y plotter is disclosed in which a single lead in the lead case is supplied to a holder in a writing block and a line drawing is performed on a drawing surface using the writing lead held by the lead.

Furthermore, Japanese Patent Application Laid-Open No. 61-132394 discloses that a plurality of pen holding parts of a writing instrument stocker provided in a writing instrument body hold a writing instrument having a built-in automatic lead feeding mechanism.

An XY plotter is disclosed in which writing instruments can be exchanged between a pen holding section on the stocker side and a pen holding section on the drawing head side.

[Problem that the invention seeks to solve]

The above-mentioned turret-type The structure of the printer is complicated, and as a result, the weight of the drawing head increases, making it impossible to control high-speed drawing. In addition, in an X-Y plotter that has a writing instrument stocker on the machine side and holds writing instruments in a plurality of pen holding parts of the stocker,
Since there is no mechanism for replenishing the writing instruments in the writing instrument stocker with leads, writing instruments that have run out of leads in the writing instrument stocker must be manually replaced with writing instruments that have leads, which is extremely inconvenient.

The present invention aims to eliminate the above-mentioned defects.

[Means to solve problems]

In order to achieve the above object, the present invention provides a writing instrument holder for removably holding a writing instrument P in which a stocker rotation drive device 19 is fixedly installed on the body side and a consumable writing core is placed inside the lead insertion hole. A rotary writing instrument stocker 16 having a plurality of 18 is removably attached to the output shaft of the stocker rotation drive device i19, and a desired writing instrument holding portion 18 of the writing instrument stocker 16 is moved to a desired position relative to the drawing surface. In a device that is capable of exchanging writing instruments with a writing instrument holder 12 of a drawing head 10 that is movable in the direction, the writing instrument stocker 16 is provided with a writing instrument located above its writing instrument holder 18. A lead storage container 24 is provided for each writing instrument holder 18, a shutter mechanism is provided at the bottom of the lead storage container 24, and a rotating arm 56 for controlling opening and closing of the opening of the shutter mechanism is rotated on the body. It is connected to the output side of the drive device 52 via a predetermined pressure force, and when the shutter mechanism is driven by the rotating arm 56 to open its opening, one of the cores in the core storage container 24 is released. The lead is supplied to the lead insertion hole of the writing instrument P below the lead storage container 24, and when the amount of rotation from the reference position on the output side of the rotation drive device 52 exceeds a predetermined amount, the lead is supplied to the lead insertion hole of the writing instrument P below the lead storage container 24. The apparatus is provided with a means for detecting an error and a control means for driving the rotary drive device 52 in the opposite direction based on a detection signal from the detecting means.

[Effect]

With the above-described configuration, when the opening of the shutter mechanism is opened by driving the rotary arm 56 in the forward direction by driving the output side of the single-rotation drive device 52 in the forward direction, the core in the core storage container 24 is moved downward. and is inserted into the lead insertion hole of the writing instrument directly below the shutter mechanism.

However, if a malfunction occurs when the lead falls and the lead gets caught in the middle of the fall, and the lead is located between the shutter mechanism and the writing instrument, the rotating arm 56 collides with the lead and moves downward from the shutter mechanism. It is no longer possible to pass through and rotate toward the reference position. When the output side of the rotary drive device is driven in the forward direction while the rotary arm 56 is prevented from passing through the shutter mechanism, the output side is subjected to a pressurizing force at the joint between the rotary arm 56 and the rotary arm 56. on the output side of the 0-rotation drive device which rotates idly with respect to the rotating arm 56 against.

When the amount of rotation in the forward direction from the reference position exceeds a predetermined value due to the above-mentioned idle rotation, the controller detects a centering error and drives the one-turn drive device in the reverse direction to rotate the one-turn arm 56.
is returned to the reference position, and the controller displays a core feed error.

〔Example〕

The structure of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

In FIG. 11, reference numeral 2 denotes the body of a paper-driven X-Y plotter, and a Y-rail 6 is fixed horizontally on a paper mounting plate 4. As shown in FIG. Both sides of the paper 8 on the mounting plate 4 are supported by a pinch roller mechanism consisting of a drive roller and a presser roller arranged on both sides of the mounting plate 4, and by the rotation of the drive rollers driven by the X motor, The paper 8 on the mounting plate 4 is fed back and forth (+-X direction). Said Y rail 6
A drawing head 10 is attached to the drawing head 10 so as to be moved along the rail 6 by the drive of a Y motor. 12
is a writing instrument holding section provided in the drawing head 10, and the holding section 12 is linked to a pen lifting mechanism built into the drawing head 10. A box 14 is disposed at one end of the Y rail 6, and the box 14 has a rotating writing instrument stocker 16 (carousel) as shown in FIG.
is installed.・Stocker 16 is in box 14
It is removably connected to the output shaft of a rotary drive device 19 consisting of a pulse motor fixedly attached to the rotary drive device 19 . This pulse motor is connected to a controller controlled by a computer. Writing instrument holders 18 are formed at regular intervals in the lower horizontal portion of the stocker 16, which consists of a pair of discs 16a and 16b, and each holder 18 has a fixed arm and a movable arm 31.
A writing instrument P is detachably held between them. It is configured such that a desired writing instrument P in the writing instrument holder 18 and the writing instrument holder f2 of the drawing head 10 can exchange each other automatically. Note that this configuration for automatic writing instrument exchange is well known and is not the gist of the present invention, so a detailed explanation thereof will be omitted. The writing instrument P has eight insertion holes for receiving consumable writing leads, and the upper end of the chain hole opens at the center of the upper end surface of the writing instrument P. The internal structure of the writing instrument P is disclosed in detail in Japanese Unexamined Patent Publication No. 132394/1983. A cylindrical core storage container 2'4 is fixed to the upper horizontal part 16c of the stocker 16, located directly above each of the holding parts 18. , a lead storage section 24a for storing a plurality of writing leads 26 is formed. A hole is formed in the center of the bottom of the core storage container 24, and the upper end of the chain type is
It opens at the center of a tapered part 24b for eight guides formed at the bottom of the core storage part 24a. The core storage container 2
A pipe-shaped core guide 28 is fitted into the hole at the bottom of the core storage container 4 and the hole in the cylindrical body 27 fixed to the lower end of the core storage container 24 so as to be slidable in the vertical direction. The core guide 2
The lower surface of the flange portion 8 is in elastic contact with the bottom inner wall surface of the cylindrical body 27 due to the elastic force of the compression coil spring 30. The lower end portion of the core guide 28 protrudes from the lower surface of the cylindrical body 27 by a predetermined amount. Reference numeral 32 designates a plate-shaped cam provided directly above each holding portion 18, and one end of this cam is rotatably supported by a shaft 34 on a disk portion 16d that is integral with the upper horizontal portion 16c. . The open end of the arm 32 has a recessed portion 36, an inclined surface 38, a lower horizontal portion 40 adjacent to the inclined surface 38, and a protrusion 42 located below the lower horizontal portion 40, as shown in FIG. It is formed as shown in -. The cam 32 is moved by the tensile force of the spring 44.
It comes into elastic contact with a stopper 46 protruding from the disk portion 16d.

In this state, the lower horizontal portion 40 of the cam 32 is located on the lower end surface of the core guide 28 and closes the lower end opening of the core guide 28. In this state, the core guide 2
As shown in FIG. 5, the upper end of 8 is set to be located at the same level as the lowest bottom surface of the core storage section 24a or slightly lower than it. In Figure 3, 50
is a bracket fixed to the bottom wall of the box 14,
This is coupled with a pulse motor controlled by the controller.
Rotating drive unit consisting of evening! ! 52 is fixedly installed.

Reference numeral 47 denotes a cylindrical lifting guide cam, and the central portion of the top wall of this cam is fixed to the output shaft 54 of the motor 52. 5
Reference numeral 6 designates a plate-shaped rotating arm, and a hole formed at one end of this arm is slidably inserted into the output shaft 54 .

The arm 56 is located in an arm regulating groove 53 formed on the peripheral wall of the cam 47, and is caused by the elastic force of a coil spring 55 compressed and fitted into the output shaft 54 to cause the arm 56 to move against the top wall of the cam 47. It is pressed against the bottom surface. Said bracket 5
0, a reference position detection sensor 64 for detecting the reference position of the rotating arm 56 is disposed. Said groove 5
3. The coil spring 55 is a known torque limiter.
Due to the torque limiter, the rotating arm 56 is normally a rotary drive device! ! When the output shaft of the drive device 52 attempts to rotate clockwise in conjunction with the rotation of the output shaft 54 of the drive device 52 and the rotation of the rotation arm 56 is blocked in FIG. The output shaft 54 is configured to rotate relative to the one-turn arm 56 when the transmission torque of the limiter is exceeded.

As shown in FIG. 8, the groove 5 is at the same level as the lower surface of the ceiling wall.
On the lower surface of the peripheral wall 47a between one end of the wall surface of the groove 53 and the other end of the wall surface of the groove 53, the amount of protrusion gradually increases with the starting point S being a surface that protrudes slightly downward from the horizontal surface of the groove 53. , an elevation control cam surface 57 is formed whose protrusion amount is maximum at the terminal end e.

The protrusion 42 is located on the rotation locus of the arm 56,
A recessed portion 58 is formed in the arm 56 . 60
62 is a stopper fixed to the upper horizontal portion 16c adjacent to each core storage container 24, and 62 is a stopper fixed to the bracket 42. IThe motor 52
, the cam 47, the stopper 62 and the arm 56 constitute a core supply actuating device, which together with the core storage container 24 and the cam 32
, the lead guide 28 and the stopper 60 constitute an automatic lead feeder.

FIG. 10 shows a case where the writing instrument stocker 16 and the lead supply actuating device are in the standard position (initial state).The actuating device No. 1 is 90 degrees off from the drawing head 10 in the figure.
It is located in the direction corresponding to In Figure 10, N001
The position corresponding to indicates the writing instrument exchange position, and the physical positions corresponding to N002 and N004 on the stocker 16 are dedicated positions for the lead storage container 24 that stores writing leads with a diameter of 0.3 mm. Further, the physical positions corresponding to No. 006, No. 8, and No. 8 on the stocker 16 are dedicated positions for a lead storage container 24 that stores writing leads having a diameter of 0.5 mm.

The cam 32 constitutes a shutter mechanism.

Next, the operation of this embodiment will be explained.

First, the initial settings of the writing instrument stocker 16 and the lead supply operating device will be explained.

First, turn on the power to the controller, press the initial setting switch, and after 1 second has elapsed to stabilize the machine.
The rotation drive device 19 is driven, and the writing instrument stocker 16 is rotated toward the reference position shown in FIG. The reference position of the stocker 16 is detected by a reference position detection sensor (not shown), and also detects whether or not the writing instrument P is held by each writing instrument holding portion 18 of the stocker 16. When the stocker 16 reaches the reference position shown in FIG. 10, the drive of the motor 19 is stopped and the stocker 16
is positioned at the position.

As described above, when the initial settings are completed, a writing instrument exchange PC command is input to the controller.

The stocker 16 is rotated by this PC command, and when the writing instrument containing the writing lead of the pen type corresponding to the PC command reaches the position N001 in FIG. 10, the rotation of the stocker 16 is stopped.

Next, the drawing head 10 moves toward the pen stocker 16 along the line 6, and the writing instrument holder 12 of the drawing head 10 holds the writing instrument P at position No. 61 in FIG. , a drawing command is input from the computer to the controller.

The controller determines whether or not the writing instrument P held by the writing instrument holder 12 is broken based on a lead breakage detection sensor (not shown) provided in the drawing head, and if not, based on the drawing command. 6 drawing heads 10 for performing drawing operations
When the writing instrument P held by the writing instrument holder 12 is out of lead, the controller determines whether the automatic lead supply device is in automatic core feeding operation, and if not, the one drawing head 10 is held. The writing instrument P stored therein is returned to the corresponding writing instrument holding section 18 of the stocker 16.

Next, the controller determines whether three or more consecutive core breakages occur, and if not, the controller determines whether one drawing head 10
The same type of writing instrument as the writing instrument P returned by is in the head position, i.e.
Stocker 16 until it reaches position No. 1 in Figure 10.
In FIG. 10, the 0 drawing head 10 that rotates the
The writing instrument P held in the stocker 16 at the position is held, and then the drawing operation begins. In parallel with this drawing operation, an automatic core feeding operation is performed.

Next, the automatic core feeding operation described above will be explained.

In response to instructions from the computer, the controller determines whether the broken writing instrument P returned from the drawing head 10 is marked N in FIG.
o, from the predetermined core feeding position indicated by 7.

First, the rotation of the stocker 16 is stopped when the stocker 16 has gone a little too far, and then the stocker 16 is rotated in the opposite direction until the writing instrument with broken lead is located at the above-mentioned core feeding position.

Zero-order to stop the above-mentioned reverse rotation of the stocker 16.

The controller drives the rotary drive bag W152 to move the arm 56 from the initial state shown in FIG.

Rotate 178.2 degrees clockwise. This rocking rotation of the arm 56 causes the arm 56 to collide with the protrusion 42 of the corresponding cam 32 . Due to this collision, the cam 32 is swung counterclockwise about the shaft 34 in FIG. 6A by the rotational force of the arm 56 against the elasticity of the spring 44. As the cam 32 swings, the core guide 28 rides on the inclined surface 38 of the cam 32, as shown in the opening of FIG. The upper end of the core storage portion 24a protrudes from the bottom surface of the core storage portion 24a by a predetermined length. As a result, one core 26 in the core guide 28 is connected to the other cores 26 in the core storage section 24a.
Next, the controller drives the rotary drive device 19 to rotate the stocker 16 by a predetermined angle, for example, +5 degrees, in the counterclockwise direction (positive direction) around the first rotation center 0 in FIG. Then, the clockwise direction is set at a predetermined angle, for example -
Rotate 5 degrees and shake the stocker 16. Due to the vibration of the stocker 16 and the vertical movement of the lead guide 28 accompanying the vibration, other leads 26 riding on the upper end of the lead guide 28 are
It comes off from the upper end of the core guide 28. After the stocker 16 has been vibrated a predetermined number of times in the positive and negative rotation directions N times, the arm 56 is swung clockwise by 1.8 degrees from the state shown in FIG.

In this state, the shaft hole, that is, the insertion hole of the core guide 28 is inserted into the recessed portion 36 of the cam 32 and the arm 56, as shown in FIG.
．． 58, that is, the opening/closing part of the shutter mechanism opens, and the lead 26 in the lead guide 28 falls downward and is inserted into the 8 insertion hole of the writing instrument P directly below the lead guide 28. After 2 seconds, the controller drives the rotary drive device 52 to
The cam 47 is rotated 540 degrees clockwise in FIG.

During this rotation, the arm 56 first collides with the stopper 60.Then, the arm 56 collides with the stopper 60.
3, the arm 56 is removed from the elevation control cam surface 5 of the cam 47.
The arm 56 descends vertically under the guidance of 7, pushes the lead inserted into the writing instrument P further into the back, and pushes out the remaining lead of the writing instrument P from the writing instrument P. Pushing of the lead into the writing instrument P by the arm 56 is completed. By the way, the arm 56 comes off the stopper 60. As a result, the arm 56 is locked to the cam surface 57 of the cam 47 and moves clockwise in conjunction with the cam 47, and the arm 56 is locked to the stopper 62 on the rotation drive device 52 side. Next, only the cam 47 rotates clockwise, and the arm 56 moves out of the maximum protrusion position of the cam surface 57 and returns to the upward position due to the elastic force of the coil spring 55. The rotation of the rotary drive device 152 stops when the primary arm 56 is detected by the reference position sensor 64 and reaches the initial state shown in FIG.
The controller moves the stocker 16 back to its initial state. As described above, when the centering operation is performed normally, the amount of rotation of the output shaft 54 of the rotary drive device 52 in the negative direction from the initial reference position is θ3. However, as shown in FIG. Then, the rotating arm 56 is prevented from rotating in the negative direction by this core, and while the rotation of the rotating arm 56 is stopped, only the output shaft 54 of the drive device 52 rotates in the negative direction.

The amount of rotation of the output shaft 54 from the reference position is counted by a pulse counter (not shown) built into the controller, and the amount of rotation is determined by the determination block 1 in FIG.
If it is determined that the value θ1 is greater than the value θ1 obtained by adding a predetermined value to The process continues until the arm 56 is detected by the reference position detection sensor 64, and when the sensor 64 turns on (block 4), the controller displays a lead supply error (block 5), and other processing continues. However, unless the stocker 16 is replaced with a writing instrument in which an error has occurred,
Shall not be used (block 7), arm 56
Rotate the rotating arm 56 counterclockwise from the state in which it engages with the protrusion 42 of the cam 32 to the reference position by a rotation amount of 02 or more, which is the rotation amount of 1 in the counterclockwise direction in FIG. 2 plus a predetermined value. If the rotating arm 56 does not pass the sensor 64 even if the rotating arm 56 is moved, the controller determines this in decision block 3, warns of the abnormality as a rotating arm error, and stops all processing (block 6).

When driving the rotating arm 56 in the opposite direction to set the arm 5.6 at the reference position, the rotating arm 56 is passed through the -degree sensor 64, and then the direction is reversed to set the arm 5.6 at the reference position. The zero rotation arm 56 to be detected is driven in the opposite direction, and after the cores have fallen, 1
If the rotating arm stops below the shutter mechanism, even if you try to pull out the writing instrument stocker 16 from the output shaft of the drive device 19, the rotating arm 56 will get in the way, making it impossible to take out the writing instrument stocker 16 from inside the box 14. Therefore, the operator cannot modify the writing instrument stocker 16;
By rotating in the opposite direction to the shutter mechanism passing direction, the rotating arm 56 returns to the reference position where it does not interfere with the drawing of the writing instrument stocker 16, so that the operator can move the writing instrument stocker 16 to the output shaft of the drive device 19. It can be pulled out and processed to remove clogged cores. As is clear from the above description, the counter built in the controller constitutes a means for detecting a lead supply error when the amount of rotation from the reference position on the output side of the rotary drive device I52 exceeds a predetermined amount. The CPU constitutes a control means that drives the rotary drive device 52 in the opposite direction based on the detection signal of the means.

〔effect〕

Since the present invention is configured as described above, it is possible to automatically supply the lead to the writing instrument on the writing instrument stocker side, and the lead is passed through the shutter mechanism of the rotating arm that controls opening and closing of the shutter mechanism below the lead storage container. When the rotation in the direction is blocked, the rotation arm rotates in the opposite direction to the reference position, thereby preventing the writing instrument stocker from becoming unable to be pulled out from the output shaft of the stocker rotation drive device. There are effects that can be done.

[Brief explanation of the drawing]

Figure 1 is a side view, Figure 2 is a plan view, Figure 3 is a side view, Figure 4 is a plan view, Figure 5 is an explanatory diagram, Figure 6 is an explanatory diagram, and Figure 7 is an explanatory diagram.
8 is a side view, FIG. 9 is a flowchart, FIG. 10 is an explanatory view, and FIG. 11 is an external view. 2...Machine body, 4...Paper placement plate, 6...
・Y rail, 8...paper, 10...drawing head. 12... Writing instrument holding part, 14... Box. 16...Writing instrument stocker, 18...Writing instrument holding part, 24...Lead storage container, 24a...Lead storage part, 26...Writing lead, 27...Cylinder body ,
28...Core guide, 30...Coil spring,
32...cam, 34...shaft, 36...
・Recessed part (8 drop holes), 38... Slanted surface, 40
...low horizontal part. 42... protrusion, 44... spring, 46...
... Stopper, 50 ... Bracket, 52
... Rotation drive device, 54 ... Output shaft, 56
...Rotating arm, 58...Recessed part, 60...
...Stopper, 64...Reference position detection sensor Patent applicant Aya□Nishijima, Patent attorney Muto Kogyo Co., Ltd. Figure 7 (A) Figure 8 Figure 10

Claims (1)

[Claims] (1) A rotary type with a stocker rotation drive device 19 fixedly installed on the body side and a plurality of writing instrument holders 18 for removably holding a writing instrument P in which a consumable writing lead is placed inside the lead insertion hole. A writing instrument stocker 16 is removably attached to the output shaft of the stocker rotation drive device 19, and a drawing head is movable in a desired direction relative to a desired writing instrument holder 18 of the writing instrument stocker 16 and the drawing surface. In a device that is capable of mutually exchanging writing instruments with ten writing instrument holders 12, the writing instrument stocker 16 has a lead located above the writing instrument holder 18 thereof, and a lead for each writing instrument holder 18. A storage container 24 is provided, a shutter mechanism is provided at the lower part of the core storage container 24, and a rotating arm 56 for controlling opening and closing of the opening of the shutter mechanism is installed on the output side of the rotary drive device 52 at a predetermined level. The shutter mechanism connects via pressure to the pivot arm 56.
When the opening is opened, the core storage container 24 is opened.
One of the cores inside is supplied to the lead insertion hole of the writing instrument P below the lead storage container 24, and the amount of rotation from the reference position on the output side of the rotary drive device 52 is An X-Y plotter comprising means for detecting a core supply error when a predetermined amount is exceeded, and a control means for driving the rotary drive device 52 in the opposite direction based on a detection signal from the detection means. Automatic writing lead feeding device.