JPH01272495A - Core replenishment device in x-y plotter - Google Patents

Abstract

PURPOSE:To supply a core to a writing utensil during drawing and to prevent the break of a rotating arm, by a method wherein one core in a core storage container is fed into a core insertion hole of the writing utensil when an opening part is opened by the drive of the rotating arm, and a writing utensil stocker is prevented from being detached from an output shaft of a rotating driver during the core feeding drive. CONSTITUTION:An arm 56 vibrates a core guide 28 by a controller. After the completion of this action, the arm 56 is rotated clockwise at an angle of 1.8 degrees. In this condition, an insertion hole of the core guide 28 coincides with recessed parts 36, 58 of an arm 32 and the arm 56. Thus, a piece of core in the core guide 28 falls downward to be inserted into a core insertion hole disposed right under the core guide 28. Next, a cam 47 is rotated clockwise at an angle of 540 degrees by driving a motor, whereby the arm 56 firstly collides with a stopper 60, thereafter vertically falling while being guided by a lifting/ falling control cam surface 57 to press the inserted core more deeply to extrude a residual core 26'. Because one of fastening protrusion pieces 16g is engaged with a protrusion part 70a during this core feeding action, a stocker 16 cannot be extracted upward from an output shaft of a driver 19.

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. The present invention relates to a lead replenishing 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 lead case is provided in a writing block provided in a drawing head, and one lead in the lead case is supplied to a holder in the writing block and held by the lead. An X-Y plotter is disclosed that draws a line on a drawing surface using a writing lead.

Furthermore, in Japanese Patent Application Laid-Open No. 61-132394, a plurality of pen holding sections of a writing instrument stocker provided in the machine body hold a writing instrument with a built-in lead automatic feeding mechanism, and the pen holding section on the stocker side and the drawing head side. An X-Y plotter is disclosed in which writing instruments can be exchanged with a pen holder.

[Problem that the invention seeks to solve]

The above-mentioned turret type X-Y plotter and X-Y plotter with a lead case provided on the plotting head hold multiple lead cartridges in the plotting head, and are equipped with a lead case to store multiple leads, so the plotting head 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 19, 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 an apparatus in which writing instruments can be exchanged with a writing instrument holder 12 of a drawing head 10 movable in the direction, the writing instrument holder 1 is placed in the writing instrument stocker 16.
8, a lead storage container 24 is provided for each of the writing instrument holding parts 18, a shutter mechanism is provided below the lead storage container 24, and a rotation mechanism is provided in the body for controlling opening and closing of the opening of the shutter mechanism. Rotating arm 56! t52
When the shutter mechanism is driven by the rotating arm 56 to open the opening, one of the cores in the core storage container 24 is moved to the lower part of the core storage container 24. A stocker detachment prevention device that prevents the writing instrument stocker 16 from detaching from the output shaft of the stocker rotation drive device 19 during the core feeding drive of the rotating arm 56. This means that a means has been established.

[Effect]

In the above-described ellipse formation, the nine drawing heads 10 drive the one-turn arm 56 while drawing on the drawing surface or while waiting for drawing to open the opening of the shutter mechanism of the desired lead storage container 24, and open the opening of the shutter mechanism of the desired core storage container 24. Refill the writing implement P below the lead with writing lead. During this lead replenishment operation, the writing instrument stocker 1
6 cannot be removed from the output shaft of the stocker rotation drive device 19. Therefore, when the first rotation arm 56 is in the position to engage with the writing instrument stocker 16, the operator may accidentally move the writing instrument stocker 16 into the stocker rotation drive device 1.
There is no risk of it being pulled out from the output shaft of 9.

If the writing instrument stocker 16 is accidentally pulled upward from the output shaft of the stocker drive device 19 to replace the writing instrument stocker 16 during operation of the rotating arm 56, the rotating arm 56 will hold the writing instrument in the writing instrument stocker 16. The rotating arm 56 may be deformed due to contact with the writing instrument of the section 18, or
The writing instrument may come off from the writing instrument stocker 16, or the lead of the writing instrument may break.

〔Example〕

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

In FIG. 18, 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 an X 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 provided at one end of the Y-rail 6, and as shown in FIG. 1, a rotating writing instrument stocker 16 (carousel) is provided in the box 14. Stocker 16 is the 19th
As shown in the figure, it is linked to the output shaft of a motor 19 with a speed reducer that is fixed to the box 14. This 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 consisting of a pair of discs 16a and 16b, and each holder 18 holds a writing instrument P in a detachable manner. The writing instrument P is configured to be able to be automatically exchanged between a desired writing instrument P in the writing instrument holder 18 and the writing instrument holder 12 of the drawing head 10. 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 a lead insertion hole into which a consumable writing lead is received, and the upper end of the 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 Japanese Patent Application Laid-Open No. 61-13.
This is disclosed in detail in Japanese Patent No. 2394. A cylindrical core storage container 24 is fixedly installed in the upper horizontal portion 16c of the stocker 16, located directly above each of the holding portions 18. As shown in FIG. writing lead 26
A core storage section 24a is formed for storing the core. A groove for fitting and holding the circumferential surface of the writing instrument P is formed in the outer periphery of the discs 16a and 16b of the stocker 16, and a pen stopper (not shown) is fixedly positioned between the upper and lower grooves. . In FIG. 1, reference numeral 31 denotes a swinging arm, which is rotatably supported by the discs 16a and 16b and biased by a spring in the direction of holding the writing instrument. Grooves in the stocker horizontal parts 16a and 16b, pen stopper and swing arm 3
1 constitutes the writing instrument holding section 18. The writing instrument P has its half circumferential surface in contact with the wall surface of the grooves of the horizontal portions 16a, 16b and the wall surface of the pen stopper, and in this state, the rotating arm 31 elastically contacts the side surface of the writing instrument P and the upper end of the pen stopper. The flange of the writing instrument P is removably fitted into the lower surface of the horizontal portion 16a, and due to their interaction, the writing instrument P is removably held in the holding portion 18. A hole is formed at the center of the bottom of the core storage container 24, and the upper end of the hole opens into the center of a guiding taber portion 24b formed at the bottom of the core storage portion 24a.

A hole in the bottom of the core storage container 24 and the core storage container 24
A pipe-shaped core guide 28 is slidably inserted into a hole in a cylindrical body 27 fixed to the lower end of the cylindrical body 27 .

The lower surface of the flange formed on the core guide 28 is in elastic contact with the inner wall surface of the bottom portion 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 26 by a predetermined amount. Reference numeral 32 denotes a plate-shaped arm provided directly above each holding portion 28, and one end of this arm 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 recess 36, an inclined surface 38,
A low horizontal portion 40 adjacent to the inclined surface 38 and a protrusion 42 located below the low horizontal portion 40 are formed as shown in FIG. The arm 32 comes into elastic contact with a stopper 46 protruding from the first disk portion 16d due to the tensile force of the spring 44, and in this state, the lower horizontal portion 40 of the arm 32 is located at the lower end surface of the core guide 28. , the lower end opening of the core guide 28 is closed. In this state, the upper end of the core guide 28 is set to be at the same level as the lowest bottom surface of the core storage section 24a, or slightly lower than that, as shown in FIG. In FIG. 5, 50 is a bracket fixed to the bottom wall of the box 14, and a motor 52 with a speed reducer controlled by the controller is fixed to this bracket. 47 is a cylindrical cam, and the center part of the top wall of this cam is connected to the motor 5.
It is fixed to the output shaft 54 of No. 2. Reference numeral 56 denotes a plate-shaped lead arm, and a hole formed at one end of the lead 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. As shown in FIG. 11, on the lower surface of the fifth circumferential wall 47a between one end of the wall surface of the groove 53 at the same level as the lower surface of the ceiling wall and the other end of the wall surface of the groove 53.

An elevation control cam surface 57 is formed in which the surface of the groove 53 that protrudes slightly downward from the horizontal plane is a starting end S, and the amount of protrusion gradually increases, and the amount of protrusion becomes maximum at the end e. The protrusion 42 is located on the rotation locus of the arm 56, and a recess 58 is formed in the arm 56. 60 is a stopper fixed to the upper horizontal portion 16C adjacent to each core storage container 24; 62 is the bracket 42;
This is a stopper fixed to the The motor 52, the cam 47. The stopper 62 and the arm 56 constitute a wick supply actuator, and the wick storage container 24, the arm 32, the wick guide 28, and the stopper 60 constitute an automatic wick supply system.

FIG. 23 shows a case where the writing instrument stocker 16 and the lead supply actuating device are in the standard position (initial state).No.
It is located in the direction corresponding to In Figure 23, No. 1
The position corresponding to indicates the writing instrument exchange position, and the physical positions corresponding to NO12 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. Also, No. on stocker 16.

The physical positions corresponding to numbers 6, No. 8, and No. 8 are dedicated positions for a lead storage container 24 that stores writing leads with a diameter of 0.5 mm. Further, the arm 32. The core guide 28 constitutes a shutter mechanism whose opening is controlled to open and close by the rotating arm 56.

Next, the operation of this embodiment will be explained.

First, the initial settings of the writing instrument stocker 16 and the lead supply actuator will be described with reference to the flowchart shown in FIG.

First, turn on the power to the controller and press the initial setting switch. After 1 second has elapsed (
Block 1), the motor 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 (block 2), and also detects whether or not a writing instrument P is held in each writing instrument holding part 18 of the stocker 16 (block 3). When the reference position shown in FIG. 23 is reached, the driving of the motor 19 is stopped, and the stocker 16 is positioned at this position (block 4). Next, the controller determines whether the stocker 16 is a writing instrument stocker for writing leads (pencils) or another type of stocker (block 5). If the stocker 16 is not for a pencil, it is determined whether or not the drawing head 10 holds a writing instrument (block 6), and if it does not hold a writing instrument, the initial setting operation is repeated. If the writing instrument is held, the writing instrument of one drawing head 10 is returned to the writing instrument holding section 18 corresponding to the smaller empty number in the stocker 16 (block 7), and the initial setting process is completed. If the detected stocker 16 is a pencil stocker, the motor 52 is driven to move the arm 5.
In block 8), whether or not the arm 56 is set in the direction of the reference position is determined based on the sensor signal. If the reference position of the arm 56 is not detected, LEAD-ARM is displayed (block 10).
), the motor 19 is stopped in a LOCAL state, that is, in a state cut off from the computer's CPU (block 11).
If it is detected that the arm 56 is set to the reference position, it is determined whether the writing instrument P is held in the drawing head 10 (block 12), and if NO, the initial setting step is completed. If Yes, confirm the type of writing instrument held. Block 13) Next, correspond to the type of writing instrument. Return the writing instrument to an empty writing instrument holding section 18 of the stocker 16, and then proceed to block 14.
), completes the initial setup operation.

When the initial settings are completed as described above, a writing instrument exchange PC command is input to the controller (block 15) as shown in FIG. In Fig. 23, the writing instruments with a built-in writing lead are No.
When reaching the position 1, the rotation of the stocker 16 is stopped (block 16).Next, the drawing head 10 moves along the rail 6 toward the pen stocker 16, and the writing instrument holder 12 of the drawing head 10 moves as follows. In Figure 23, No.

Hold writing instrument P in position 1 (block 17) 0
Next, a drawing command is input from the computer to the controller (block 18), and the controller uses the lead breakage detection sensor (not shown) provided in the drawing head to
It is determined whether the writing instrument P held by the writing instrument holding section 12 is broken, and if not, the writing instrument P held by the writing instrument holding section 12 of the six drawing heads 10 that performs drawing operation based on one drawing command is determined. When the lead is out of lead, the controller determines whether or not the automatic lead feeding device is in the automatic lead feeding operation (block 21). If not, the drawing head 10 moves the held writing instrument P to the stocker 16. The writing instrument is returned to the writing instrument holder 18 (block 22).

Next, the controller judges whether or not the lead has broken three times in a row or more (block 23). , No., rotate the stocker 16 until it comes to the 1 position. Furthermore, the judgment block 23
If the controller determines YES, the controller recognizes the error in the x-y plotter and stops the x-y plotter (
block 25). When the rotation control of the stocker 16 in block 24 is completed, one drawing head 10 holds the writing instrument P held in the stocker 16 at the No. 1 position in FIG. Return to drawing operation. In parallel with this drawing operation, an automatic core feeding operation (block 27) is performed.

Next, the automatic core feeding operation will be explained with reference to FIG. 26.

The controller determines that the broken writing instrument P returned from the drawing head 10 is marked N in FIG.
The rotation of the stocker 16 is stopped when it has gone slightly beyond the predetermined core feeding position indicated by o and 7 (block 28).
. Next, when the stocker 16 is rotated in the reverse direction and the lead-out writing instrument is located at the core supply position, the reverse rotation of the stocker 16 is stopped (block 29) 6 Next, the controller drives the motor 52 to 56 from the initial state shown in FIG. 7A by 178° clockwise in FIG. collide with This collision causes the arm 32 to move against the spring 4.
4, the arm 56 swings counterclockwise about the shaft 34 in FIG. 8A due to the rotational force of the arm 56. As the arm 32 swings, the core guide 28 rides on the inclined surface 38 of the arm 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. Thereby, one core 26 in the core guide 28 is completely separated from the other plurality of cores 26 in the core storage section 24a.

Next, the controller drives the motor 52 and the arm 5
As shown in FIG. 9, the core guide 28 swings 1.8 degrees counterclockwise (block 31).
The lower end of is moved to the lower horizontal portion 40 of the arm 32, and the core guide 28 is lowered.

Next, the controller rotates the arm 56 by 1.8 degrees clockwise as shown in FIG. 8 (block 32).
The core guide 28 rises. This lowering and raising is repeated an arbitrary N number of times to vibrate the core guide 28. When the core guide vibration operation is completed N times, the arm 56 is swung 1.8 degrees clockwise from the state shown in FIG. 8 as shown in FIG. 10 (block 33). In this state, The shaft hole, that is, the insertion hole of the core guide 28 is as shown in FIG.

It corresponds to the recessed part 36.58 of the arm 32 and the arm 56,
The lead 26 in the lead guide 28 falls downward and is inserted into the lead insertion hole of the writing instrument P directly below the lead guide 28. After 62 seconds (block 34), the controller drives the motor 52 to insert the cam. 47 is rotated 540 degrees clockwise in FIG. 10 (block 35). During this rotation, arm 56 first collides with stopper 60, as shown in FIG.

Next, the arm 56 is removed from the arm regulating groove 53 of the cam 47, and the arm 56 is vertically lowered as shown in FIG. 12 by the guide of the elevation control cam surface 57 of the cam 47, and is inserted into the writing instrument P. The remaining lead 26' of the writing instrument P is pushed out from the writing instrument P by pushing the lead further inward. Arm 5
6 has completed pushing the lead into the writing instrument P, as shown in FIGS. 13 and 19, the arm 56
It comes off from the stopper 60. As a result, the arm 56 is locked to the cam surface 57 of the cam 47.

The arm 56 moves clockwise in conjunction with the cam 47.
As shown in FIGS. 14 and 20, it is locked to a stopper 62 on the motor side. Next, only the cam 47 rotates clockwise, and the arm 56 moves out of the maximum protruding position of the cam surface 57, as shown in FIGS. 15 and 21, and returns to the upward position by the elastic force of the coil spring 55. , the arm 56 is fitted into the arm regulating groove 53 of the cam 47. When the arm 56 reaches the initial state shown in FIG.
2 stops rotating. Next, the controller moves the stocker 16 back to its initial state (block 36);
Note that the lead 26 in the writing instrument storage section 24a is guided by the tapered surface 24b and the lead guide 2 is in a descending state.
automatically inserted into 8. Next, a description will be given of a stocker detachment prevention means that prevents the writing instrument stocker 16 from detaching from the output shaft of the stocker rotation drive device 19 while the rotating arm 56 is being driven to supply the core.

In FIG. 3, 16f is a lower disk portion of the writing instrument stocker 16, and four locking protrusions 16g having a predetermined width are formed at 90 degree intervals on this.

70 is a bracket 72 fixed to the bottom of the box 14
The locking pawl is rotatably supported by a shaft 74, and is biased clockwise in FIG. are in contact with each other. The protrusion 70a of the locking pawl 70 is disposed directly above the rotation locus of the locking protrusion 16g with a slight gap therebetween. The protrusion 70a
has a horizontal stopper surface 70b that locks the locking protrusion 16g.
An inclined surface 70a is formed to guide the protruding piece 16g downward. During execution of the core feeding program, the locking protrusion 16g rotates at 0 degrees, 90 degrees, and 18 degrees around the rotation center of the stocker 16 with respect to the locking claw 70, as shown by solid lines in FIG.
The angle is set to either 0 degrees or 270 degrees. Therefore, when the writing instrument stocker 16 returns to its initial state, the projections 16g are at 45 degrees, 135 degrees, and 225 degrees with respect to the locking claw 70, as shown by broken lines in FIG.

The angle is set to be one of 315 degrees. In the above configuration, during the operation of supplying the lead to the writing instrument P, one of the locking protrusions 16g as shown in FIG.
The stocker 16 is located directly below the projection 70a of the locking pawl 70, and is locked by the projection 70a, so that the stocker 16 cannot be pulled upward from the output shaft of the stocker drive device 19. When the operation of supplying the lead to the writing instrument P is completed and the stocker 16 returns to the initial setting state, all of the protrusions 16g come off from directly below the protrusion 70a of the locking pawl 70, and the stocker 16
is in a state where it can be freely extracted upward from the output shaft of the stocker drive device 19.

In addition, as another embodiment of the stocker detachment prevention means, a second
7, the bottom bracket 76 of the box 14
The solenoid 78 is fixedly installed through the solenoid 78.
is connected to the controller of the X-Y plotter, and under the control of this controller, solenoid 7 is
A stopper bar 8o connected to the output shaft of the writing instrument stocker 16 protrudes above the lower disc portion 16f of the writing instrument stocker 16, and prevents the writing instrument stocker 16 from moving in the direction of being pulled out from the output shaft of the stocker drive device, thereby preventing the lead supply operation. Once completed, the stopper bar 80 may be configured to be retractable from above the stocker's lower disc portion 16f. Also, the second
As shown in Fig. 9, a solenoid 82 that is controlled on and off by the controller of the X-Y plotter is fixedly installed in a box 80 for arranging the stocker provided in the machine body, and the output shaft 84 of this solenoid 82 is connected to the stocker outlet. During core feeding operation, the output shaft 84 of the solenoid 82 is inserted into the lock hole 88 under the control of the controller, and the cover 86
is locked so that the cover 86 cannot be opened around its hinge portion 90, thereby making it impossible to pull out the stocker 16 from the box 80, and when the core feeding operation is completed, the solenoid 82
The opening/closing cover 86 may be unlocked by turning off the opening/closing cover 86.

〔effect〕

Since the present invention is configured as described above, it is possible to supply a lead to the writing instrument on the writing instrument stocker side during drawing, and it is possible to prevent the writing instrument stocker from being pulled out from the output shaft of the stocker drive device during this lead supply operation. This has the effect of preventing malfunctions such as damage to the rotating arm.

[Brief explanation of the drawing]

Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a plan view, Fig. 4 is a side view, Fig. 5 is a side view, Fig. 6 is a plan view, and Fig. 7 is a plan view.
The figure is an explanatory diagram, Fig. 8 is an explanatory diagram, Fig. 9 is an explanatory diagram, and Fig. 10 is an explanatory diagram.
The figures are explanatory views, Figure 11 is a side view, Figure 12 is a side view, Figure 13 is a side view, Figure 14 is a side view, Figure 15 is a side view, Figure 16 is a plan view, Figure 17 is a plan view, and FIG. 18 is a plan view. Fig. 19 is a plan view, Fig. 20 is a plan view, Fig. 21 is a plan view, Fig. 22 is an external view, Fig. 23 is an explanatory drawing, Fig. 24 is a flow chart, Fig. 25 is a flow chart, Fig. 26 27 is a side view, FIG. 28 is a plan view, and FIG. 29 is a sectional view. 2...Machine body, 4...Paper placement plate, 6...
・Y rail, 8...paper, 10...drawing head. 12... Writing instrument holding part, 14... Box. 16... Stocker, 18... Writing instrument holding part. 24... Core storage container, 24a...° Core storage section 2
26...Writing lead, 27...Cylinder body, 28...
・・Core guide, 30・・・Coil spring, 31・
... Arm, 34 ... Axis, 36 ... Recessed part, 38 ... Inclined surface, 40 ... Low level horizontal part, 42 ... Protrusion, 44 ... spring,
46,60.62...stopper, 48...
・Remaining core holder, 50...Bracket, 52・
...Motor, 54...Output shaft, 56...
- Rotating arm, 58... recessed part. 60...stopper, 70...locking claw, 72...
・Bracket, 73...Coil spring, 76...Bracket, 78...Solenoid, 80...Box,
82...Solenoid, 84...Solenoid, 86.
...Opening/closing cover, 88...Lock hole, Patent applicant: Muto Kogyo Co., Ltd. Attorney Aya Yuro Nishijima Figure 5 Figure 6 Figure 11 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23

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 the device that allows writing instruments to be exchanged mutually between the writing instrument holding units 12 of 10, the writing instrument stocker 1
6, a lead storage container 24 is provided for each writing tool holder 18, located above the writing tool holder 18, a shutter mechanism is provided below the lead storage container 24, and an opening of the shutter mechanism is provided in the body. A rotary arm 56 for controlling opening and closing is disposed in conjunction with the rotary drive device 52, and when the shutter mechanism is driven by the rotary arm 56 and its opening is opened, the core in the core storage container 24 is removed. One of the leads is supplied to the lead insertion hole of the writing instrument P below the lead storage container 24, and the stocker rotation drive of the writing instrument stocker 16 is performed while the rotating arm 56 is driving the lead supply. A core replenishing device for an X-Y plotter, characterized in that a stocker detachment prevention means is provided to prevent the device 19 from detaching from the output shaft.