JPS62157000A - Method and device for discharging residual lead of automatic drawing machine - 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 Field of the Invention The present invention relates to a method and apparatus for discharging residual core from an automatic drafting machine.

Conventional technical patent publication No. 57-36879 and Utility Model Publication No. 57-5193
As shown in the publication, an automatic drawing machine is known that draws lines, etc. on paper with the pencil lead by moving a writing instrument that automatically feeds out the lead of the pencil in a predetermined direction. There is.

Problems to be Solved by the Invention In such automatic drawing machines, when the pencil lead inside the writing instrument becomes too long to be fed out, it is necessary to eject it from the writing instrument and feed out a new pencil lead next time. There is no method for efficiently and automatically discharging the above-mentioned cores and remaining cores, and such a method for discharging the remaining cores is desired.

Means for Solving Problem 6 and Operation A writing device equipped with a writing instrument that sequentially feeds out leads with a lead chuck is moved to a predetermined remaining lead ejection position when the lead chuck cannot feed out the lead, and the writing instrument is moved to a predetermined remaining lead discharge position, This method of discharging the remaining cores is such that the refills are opened, the refills are allowed to fall and come into contact with the upper end of the remaining cores, and then the refills are fed out with a lead chuck and the remaining cores are pushed out and discharged to the remaining cores discharging part.

A case equipped with a lead guide is attached to the main body, a chuck ring is fixed inside this case, a quiz is inserted so that it can be slid up and down, and a lead stock is equipped with a lead chuck inside the seven nozo Izo? A coil spring is provided between the core stock and the chuck ring to bias and hold the core chuck in a position where the core stock is compressed and deformed in the radial direction by the chuck ring, and a tsquib is inserted into the main body. Equipped with a lifting mechanism that moves up and down, a stopper that restricts the upward movement of the lead stock, and a FA sensing mechanism at the lowest point of the lead chuck, the remaining lead can be pushed out and discharged by feeding out the refill with the lead chuck. Remaining core discharge device.

Example of an actual plane Figure 6 is an overall front view of the automatic drafting machine, and Figure 7 is its vertical sectional view.The drafting machine body A has a pair of left and right vertical frames 4.
A guide rail 411 is installed between 0 and 7, and the housing device B moves the upper and lower guide rollers 42 along the 7 guide rail 41.
．． 43 so that it can be moved left and right,
The writing device B is connected to a wire 44 in the left and right direction that is wound and fed out by a winding roller (not shown), and on the F side of the writing device B, there are an F-bed roll 45, a drive roller 46, a support loan 47, and a wire 44 that is fed out. 1. A second pressure row 248.49 is disposed, and the first and second pressure rows 248.49 are pressed against the driving roller 46 and the support row 247 to form a sheet feeding mechanism C. , the paper is conveyed along the paper guide 1D in a direction perpendicular to the moving direction of the writing device B, and
Continuing with the bed roll 45, a remaining core discharge hole 50 and a protrusion 51 are provided on the 4° side of both vertical frames.

The writing device B includes a base 52 having upper and lower guide rollers 42, 43, and a cover 53 is rotatably attached to the base 52 by a hinge (not shown). It has a main body 555c fixed by a bolt to form a space 54 between them, a pair of writing instruments B are provided in the space 54, and the wire 44 is connected to the base 52. The main body 55 is provided with a fixed block 1, a stopper 2, and an elevating mechanism 3, the elevating mechanism 3 is provided with a drive roller 3a provided on the base 52, and a driven roller 3, and the driven roller 3J is provided with a cover integrally 53. is supported on an arm 56 that is swingably supported on the
The arm 56 is biased to swing by a drive roller 3911 by a spring 57.

In the writing instrument E, a vibro is slidably inserted into a cylindrical case 5, a sleeve 7 is integrally attached to the upper part of the vibro that protrudes from the case 5, and a lead stock 8 is fitted and inserted. A cap 9 is removably attached to the upper part of the stock 8, and the case 5 is held on a base 52 by a fixed block 1. A stock holder 2 is located above the cap 9 and is driven by the sleeve 7. The roller 3a and the driven roller 3b are in pressure contact with each other to constitute the elevating mechanism 3.

FIG. 1 is a detailed sectional view of the writing instrument E. A lead guide 2° is attached to the tip of the cylindrical case 5, and this lead guide 21 has a large diameter hole 22, a small diameter hole 23, and a lead. Insertion hole 24
A holding cylinder 25 is tightly fitted and fixed in the large diameter hole 22, and a core holding bushing 26 is provided between the inside of the holding cylinder 25 and the small diameter hole 22. The lead holding bushing 26 is inserted so as to be able to move up and down, and has a slit 27 opened at the top so that it can be slightly deformed in the radial direction, and the lead inlet 26a has a funnel shape that expands upward to allow the lead to be inserted. The coil spring 28 is biased to the upper position where the upper small diameter portion 26b fits into the opening 25a of the holding cylinder 25, and the coil spring 28 is biased to the F position where it abuts the bottom of the small diameter hole 23. It allows you to move against.

A chuck ring 29 is fitted and fixed to the F section of the knob 6 which is slidably fitted into the upper part of the case 5, and the inner peripheral surface 2 of the chuck ring 29 is fitted and fixed.
9a has a tapered shape expanding in the F direction, and three steel balls fitted into the outer peripheral surface of the F portion of the core chuck 30 are in contact with the inner peripheral surface 29a.

The core chuck 30 has a slit 32 opened at the F part so that it can expand and contract in the radial direction, and the upper part of the core chuck 30 is slidably fitted to the upper part of the vibro. A core insertion hole 3 is fitted and fixed to the F section of the inserted cylindrical core stock 8, and is bored in the bottom 8a of the core stock 8.
3 opens concentrically to the core chuck 30, and a coil spring 34 is provided across the chuck ring 29 and the F end surface of the core stock 8.
The core chuck 30 is biased in the direction of separation by the coil spring 34, and the steel balls 31 press against the inner circumferential surface 29a of the chuck ring 29, so the core chuck 30 shrinks and deforms in the radial direction to strengthen the core. At the same time, a cap 9 is detachably attached to the top of the lead stock 8 so that the lead can be replenished into the lead stock 8.

There is a protruding piece lO on the part protruding from the case 5 of the vibro.
is fixed, and the microswitch 11 facing this protrusion lO is attached to the front base 52, thereby forming the lowest point sensing mechanism 4 of the core chuck 30.

Next, the operation of feeding out the pencil lead will be explained.

Drive roller 3afi = reverse direction and raise the vibro together with the sleeve 7 (7. When the cap 9 comes into contact with the stopper 2, the core stock 8 relatively slides in the F direction along the vibro and resists the coil spring 34. The core chuck 30 moves in the F direction, and the steel balls 31 move away from the inner peripheral surface 29a of the chuck ring 29 and expand in the radial direction.
The inner lead F of lead brass passes through the lead chuck 30 and falls to the lead inlet 26m of the lead holding button 26.

In this state, the drive roller 3a% rotates forward and the cap 9 is closed. -2, the core chuck 32 is moved upward by the coil spring 34, and the steel ball 31 comes into pressure contact with the inner circumferential surface 29a of the chuck ring 29, causing the core chuck 32 to move upward.
0 holds the core Ft-.

In this state, when the drive roller 3at further rotates in the normal direction, the sleeve 7 and the vibro? Since the lead chuck 30 moves in the F direction together with the lead stock 8 through the lead stock 8, the lead F is also moved in the F direction.
As shown in the figure, the lead F passes through the lead holding bush 26 and projects from the lead insertion hole 24 of the lead guide 20 in the direction F.

After this, the drive roller rotates forward to 3nkY and vibro? ]l
- By pushing in one after another, the lead F is fed out one after another, and the F Vm surface of the vibro as shown in Figure i83 comes into contact with the upper surface of the lead guide 20 - The pushing of j-, b and the nogib 6 is stopped. It reaches the most pushed position and the lead stops feeding out.

At this time, the protruding piece lO provided on the knob 6 comes into contact with the microswitch 11, turning it on, and sensing the highest point.

As a result, the lead F is extended by the amount of the Pizoro's F downward stroke.

The drive roller 3a is activated by the ON signal of the microswitch 11.
k Reverse the rotation and move the nozzle 6 upward together with the sleeve 7. At this time, since the lead F is held by the lead holding bush 26, the lead chuck 〇 expands and deforms in the radial direction and loses its holding force for the lead F. Since the lead stock 8 is moved upwardly by the sleeve 6, the lead F only moves upward by a small distance, as shown in FIG.

Then, the drive roller 3a is rotated in the normal direction again to push in the vibro, thereby feeding out the core F'i in the same manner as described above.

Next is the operation to eject the remaining core? explain.

By repeating the above-mentioned operation several times and repeating the wick Fi sequentially, the wick F becomes shorter as shown in Fig. 5(a), and the vibro is moved upward as shown in Fig. 5(b). The lead F cannot be held by the lead chuck 30 when it moves, and the lead F is held by the lead holding bush 26.

In this state, when the drive roller 3ai rotates forward and the nib 6 is moved in the direction F, the lead chuck 30 is not gripping the lead F, so the vibro receives the pen pressure when drawing a line on the paper with the lead F. It does not work, and the vibro smoothly lowers F in a short time, pushes the lead F with the F end face of the lead chuck 30, and advances it as shown in FIG. 5(C). When it reaches the lowest point, the micro switch 11
turns on.

At this time, the time it takes for the microswitch 11 that was turned ON in the state shown in Figure 5 (8) to turn ON again is longer than the time it takes for the microswitch 11 to turn ON again during normal lead feeding. F senses that the oath is no longer possible. Note that it may be possible to directly measure the length of the lead F using a photoelectric switch or the like to detect that the lead F has become unwritable, has been jammed, or has a remaining lead that should be ejected.

Then, as shown in FIG. 5(d), the above-mentioned vibro is moved up and down several times, and if the wick F1 cannot be exposed, it is determined that there is no wick and it is time to replace the wick.

In response to the above-mentioned judgment signal, the stirrup writing device B is moved to a position where one writing instrument E faces the remaining lead discharge hole 50 as shown in FIG. 5(e), and the drive roller 3a is reversed to move the vibro upward. , press the cap 9 against the stopper 2, and do the same as above to remove the refill F/-? Core chuck 3
It protrudes in the F direction from 0 and hits the core F.

The drive roller 3ai rotates forward to lower the pipe 6t"F, and the fifth
As shown in Fig. 5(f), push the lead Fi with the refill F/ so that it faces the remaining lead discharge hole 50, and move the writing device B as shown in Fig. 5(g) with the ON signal of the micro switch 1 to remove the lead. F is folded by the protrusion 51, and the broken core p/1 is passed through the remaining core discharge hole 50.
Store inside.

The drive roller 3at rotates in reverse to raise the vibro, and the drive roller 3ai rotates in the normal direction again to turn the microswitch 11 on.
Lower the vibro iF until it reaches N, push the lead F with the refill p/ as shown in FIG. part facing the remaining core discharge hole 50.

With the ON signal of the micro switch ti, move the recording device B to the left as shown in Fig. 5 (1), fold it with the protrusion 51 of the refill F'1, drop it into the remaining lead discharge hole 5o, and store it. .

As a result, the refill lead F' is located at the beginning, and thereafter, writing is performed on the normal operation side N'.

Effects of the invention The remaining core can be efficiently and automatically discharged to a predetermined discharge position by using the feeding of the refill.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of the same, FIGS. 2, 3, and 4 are explanatory diagrams of the feeding operation of the lead.
Figures 5(a) to 0) are explanatory diagrams of the remaining core discharge operation; Figure 6;
FIG. 7 is an overall front view and sectional view of the automatic drafting machine. B is a writing device, E is a writing instrument, F is a lead, F' is a refill, 2 is a stopper ξ-13 is an elevating mechanism, 4 is an up/down F point sensing mechanism,
5 is a case, 6 is a pipe, 8 is a core stock, 20 is a core guide, 29 is a chuck ring, 30 is a core chuck, 34
is a coil spring, and 55 is the main body.

Claims (1)

[Scope of Claims] 1. In an automatic drafting machine that moves in a predetermined direction a writing device B equipped with a writing instrument E that moves a lead chuck 30 to sequentially feed out the leads as the lead wears out, the lead chuck 30 When the lead cannot be fed out, move the writing device B to the predetermined remaining lead discharge position, open the lead chuck 30, drop the refill, and let it come into contact with the upper end of the remaining lead, and replace it in this state. A method for discharging residual lead from an automatic drafting machine, characterized in that the lead is fed out by a lead chuck 30, and the remaining lead is pushed out from a writing instrument E using a refill. 2. A cylindrical case 5 is attached to the main body 55 that is moved in a predetermined direction.
is fixed, and a core guide 20 is attached to the lower end of this case 5, and a pipe 6 is fitted into the case 5 so as to be vertically slidable, and a chuck ring 29 is attached to the lower end of this pipe 6.
At the same time, a core chuck 30 that expands and contracts in the radial direction is fixed to the lower end of the core stock 8 that is slidably inserted into the pipe 6, and the chuck ring 29 and the core stock 8 are fixed to each other. A coil spring 34 is provided to reduce and deform the core chuck 30 in the radial direction with a chuck ring 29, and the main body 55 is provided with a lifting mechanism 3 that moves the pipe 6 up and down, and restricts the upward movement of the core stock 8. The remaining lead of an automatic drafting machine is characterized in that a stopper 2 is provided to detect the lowest point of the lead chuck 30, a lowest point detection mechanism 4 is provided to detect the lowest point of the lead chuck 30, and a remaining lead discharge part is provided on one side of the main body 55 in the direction of movement. Ejection device.