JPH0462559B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for discharging residual core from an automatic drafting machine.

Prior Art As shown in Japanese Patent Publication No. 57-36879 and Publication Utility Model No. 57-5193, a writing instrument that automatically feeds out the lead of a pencil one after another is moved in a predetermined direction to draw lines, etc. on paper with the lead of the pencil. An automatic drafting machine that draws .

Problems to be Solved by the Invention In such an automatic drawing machine, 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 new pencil lead one by one. There is no method for efficiently and automatically discharging the core, that is, the core remaining, and such a method for discharging the core remaining is desired.

Means and operation for solving the problem A writing device equipped with a writing instrument that sequentially draws out the lead by moving the lead chuck up and down multiple times is moved to the remaining lead discharge hole when the lead chuck becomes unable to feed out the lead. , open the lead chuck and let the refill fall so that it touches the upper end of the remaining lead, then move the lead chuck to the lowest position and feed out the refill, allowing the lower end of the remaining lead to come into contact with the remaining lead discharge hole. In this state, move the writing device, fold the lower end of the remaining lead, and store it in the remaining lead discharge hole, then move the writing device again, move the remaining lead to the remaining lead discharge hole, and move the lead chuck up and down. A method for discharging remaining cores by moving and using a refill to drop the remaining cores into the remaining core discharge hole and storing them.

Embodiment FIG. 6 is an overall front view of an automatic drawing machine, and FIG. 7 is a longitudinal sectional view thereof.The drawing machine body A has a guide rail 41 installed between a pair of left and right vertical frames 40, 41 along writing device B
is provided to be movable left and right by upper and lower guide rollers 42 and 43, and a wire 44 in the left and right direction that is wound and unwound by a winding roller (not shown) is connected to the writing device B.
Below are an underlay roll 45, a drive roller 46, a support roller 47, and first and second pressure rollers 48, 4.
9 are arranged, first and second pressure rollers 48,
49 is in pressure contact with the drive roller 46 and the support roller 47 to constitute a paper feeding mechanism C, which transports the paper along the paper guide D in a direction orthogonal to the moving direction of the writing device B. A remaining core discharge hole 50 and a protrusion 51 are continuously provided on both vertical frame 40 sides.

The writing device B includes upper and lower guide rollers 42 and 43.
A cover body 53 is rotatably attached to the base 52 by a hinge (not shown), and has a main body 55 fixed with bolts to form a space 54 between them. At the same time, the space 5
A pair of writing instruments E are provided in the main body 55, the wire 44 is connected to the base 52, a fixing block 1, a stopper 2, and a lifting mechanism 3 are provided in the main body 55. A drive roller 3a and a driven roller 3b are provided on a stand 52, and the driven roller 3b is supported by an arm 56 swingably supported on a cover body 53, and the arm 56 swings toward the drive roller 3 by a spring 57. energized.

The writing instrument E has a pipe 6 slidably inserted into a cylindrical case 5, and a sleeve 7 is integrally attached to the upper part of the pipe 6 protruding from the case 5.
In addition to inserting the core stock 8, a cap 9 is detachably attached to the upper part of the core stock 8, and the case 5 is held on the base 52 by the fixing block 1, and a stopper is placed above the cap 9. 2 is located, and a driving roller 3a and a driven roller 3b are in pressure contact with the sleeve 7 to constitute an elevating mechanism 3.

FIG. 1 is a detailed sectional view of the writing instrument E, in which a lead guide 20 is attached to the tip of the cylindrical case 5, and the lead guide 21 has a large diameter hole 22 and a small diameter hole 23 through which the lead is inserted. A holding cylinder 25 is tightly fitted and fixed in the large diameter hole 22, and a core holding bush 26 is formed between the holding cylinder 25 and the small diameter hole 22. The lead holding bushing 26 has a slit 27 that opens 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 hold the lead. It is easy to insert, and is biased by the coil spring 28 to an upper position where the upper small diameter portion 26b fits into the opening 25a of the holding cylinder 25.
Moreover, it is configured to be able to move against the coil spring 28 to a lower position where it comes into contact with the bottom of the small diameter hole 23.

A pipe 6 slidably inserted into the upper part of the case 5
A chuck ring 29 is fitted and fixed to the lower part of the
The inner circumferential surface 29a has a tapered shape expanding downward, and a steel ball 31 fitted into the lower outer circumferential surface of the core chuck 30 is in contact with the inner circumferential surface 29a.

The core chuck 30 is formed with a slit 32 opening at the bottom so that it can expand and contract in the radial direction, and the upper part of the core chuck 30 is slidably inserted into the upper part of the pipe 6. A core insertion hole 33 formed in the bottom 8a of the core stock 8 is opened concentrically with the core chuck 30, and the chuck ring 29 and the bottom of the core stock 8 are fitted and fixed to each other. A coil spring 34 is provided across the end face, and the chuck ring 29 and the core chuck 30 are connected to the coil spring 3.
4, the steel balls 31 are pressed against the inner circumferential surface 29a of the chuck ring 29, so the core chuck 30 shrinks and deforms in the radial direction to firmly hold the core. A cap 9 is detachably attached to the upper part of the stock 8 so that the core can be replenished into the core stock 8.

A protruding piece 10 is fixed to the part of the pipe 6 that protrudes from the case 5, and a micro switch 11 facing the protruding piece 10 is attached to the base 52, thereby lowering the lowest point of the core chuck 30. It constitutes a sensing mechanism 4.

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

When the drive roller 3a is reversed and the pipe 6 is raised together with the sleeve 7, and the cap 9 is brought into contact with the stopper 2, the core stock 8 slides relatively downward along the pipe 6 and resists the coil spring 34. As a result, the lead chuck 30 moves downward and the steel balls 31 move away from the inner circumferential surface 29a of the chuck ring 29 and expand in the radial direction. Holding bush 2
6 to the core inlet 26a.

In this state, when the drive roller 3a is rotated forward to separate the cap 9 from the stopper 2, the core chuck 32 is moved upward by the coil spring 34, and the steel balls 31 are pressed against the inner circumferential surface 29a of the chuck ring 29, causing the core The chuck 30 holds the lead F.

If the drive roller 3a is further rotated in the normal direction in this state,
As the lead chuck 30 moves downward together with the lead stock 8 via the sleeve 7 and pipe 6, the lead F is also moved downward, and as shown in FIG. It protrudes downward from the core insertion hole 24 of.

From this point on, the drive roller 3a is further rotated in the normal direction and the pipes 6 are successively pushed in, so that the core F is sequentially fed out, and the lower end surface of the pipe 6 comes into contact with the upper surface of the core guide 20 as shown in FIG. Then, the pushing of the pipe 6 is stopped and reaches the most pushed position, and the feeding of the core is stopped.

At this time, the protruding piece 10 provided on the pipe 6 comes into contact with the micro switch 11 and turns on, sensing the lowest point.

As a result, the lead F is fed out by the downward stroke of the pipe 6.

The drive roller 3a is reversed by the ON signal of the micro switch 11, and the pipe 6 is moved upward together with the sleeve 7. At this time, the lead F is held by the lead holding bush 2.
6, the core chuck 30 expands and deforms in the radial direction, and the holding force of the core F is lost, and the core chuck 30 moves upward along with the core stock 8 by the pipe 6 via the coil spring 34. Therefore, as shown in FIG. 4, the lead F moves upward only by a small distance as the lead holding bush 26 moves from the lower position to the upper position by the coil spring 28.

Then, the drive roller 3a is rotated in the normal direction again to push the pipe 6 in, thereby feeding out the core F in the same manner as described above.

Next, the operation for discharging the remaining core will be explained.

When the wick F is sequentially repeated by repeating the above-mentioned operation several times, the wick F becomes shorter as shown in FIG. 5a, and when the pipe 6 is moved upward as shown in FIG. can no longer be held by the lead chuck 30, and the lead F is held by the lead holding bush 26.

In this state, the drive roller 3a is rotated forward and the pipe 6
When the is moved downward, since the lead chuck 30 does not grip the lead F, the pen pressure when drawing a line on the paper D with the lead F is not applied to the pipe 6, and the pipe 6 descends smoothly in a short time. As shown in FIG. 5c, the lead F is pushed out with the lower end surface of the lead chuck 30, and when it reaches the lowest point, the micro switch 11 is turned on.

At this time, the time it takes for the micro switch 11, which was turned on in the state shown in Figure 5a, to turn on again is shorter than the time it takes for the micro switch 11 to turn on again during normal lead feeding, and this causes the lead F to write. sense that it has become impossible. 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, that is, that it has become a remaining lead that should be ejected.

Then, as shown in FIG. 5d, the above-mentioned vertical movement of the pipe 6 is repeated several times, and if the lead F cannot be fed out, it is determined that there is no lead and it is time to replace the lead.

As shown in FIG.
At the same time, the drive roller 3a is reversed to move the pipe 6 upward, and the cap 9 is pressed against the stopper 2, and the refill F' is projected downward from the lead chuck 30 in the same manner as described above. Hit it on the core F.

The drive roller 3a is rotated in the normal direction to lower the pipe 6, and as shown in FIG. Move the device B as shown in Fig. 5g and fold the core F by the protrusion 51.
F″ is stored in the remaining core discharge hole 50.

The drive roller 3a is reversely rotated to raise the pipe 6, and the drive roller 3a is rotated forward again to lower the pipe 6 until the micro switch 11 is turned on.
As shown in FIG.
Bring it inside.

With the ON signal of the micro switch 11, the writing device B is moved to the left as shown in FIG.

As a result, the refill lead F' is located at the beginning, and then normal operation control is performed to perform writing.

Effects of the Invention The remaining core can be discharged and stored in the remaining core discharge hole 50 by using the feeding of the refill by the lead chuck 30,
The remaining core can be reliably discharged and the post-treatment of the discharged remaining core becomes easy.

In addition, the lower end of the remaining core is folded and stored in the remaining core discharge hole 50, and the remaining core is again fed out to fall into the remaining core discharge hole 50 and stored. The core feeding stroke by the vertical stroke of 30 can be made shorter than the length of the remaining core, and the depth of the remaining core discharge hole 50 is shallower than the length of the remaining core, making post-processing of the discharged remaining core easier.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view of a writing instrument, FIGS. 2, 3, and 4 are explanatory diagrams of the lead feeding operation, and FIGS. 5 a to 5 i are illustrations of the remaining lead ejection operation. The explanatory drawings, FIG. 6, and FIG. 7 are an overall front view and a 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, 3 is a lifting mechanism, 4 is a lowest point detection mechanism, 5 is a case, 6 is a pipe, 8 is a lead stock, 20 29 is a core guide, 29 is a chuck ring, 30 is a core chuck, 34 is a coil spring, and 55 is a main body.

Claims (1)

[Claims] 1. A case 5, a lead guide 20 provided at the lower end of the case 5, and a core guide 20 provided within the case 5 to be movable up and down by a predetermined stroke to hold the lead when moving downward and to move the lead upward. When moving, do not hold the core,
And a core chuck 30 that opens at the highest position.
It consists of a core stock 8 provided above the core chuck 30 continuously, and a lifting mechanism 3 that moves the core chuck 30 up and down. A writing device B is provided with a writing instrument E that moves downward to a lowered position, then moves the lead chuck 30 upward to hold the lead, and then moves downward again so that the lead protrudes from the lead guide 20 and is sequentially fed out. In an automatic drawing machine that moves in the direction of 3
0 to the highest position and release it, the refill in the lead stock 8 falls along the lead chuck 30 and comes into contact with the upper end of the remaining lead, and the refill is held by the lead chuck 20. By descending to the lowest position, the lower end of the remaining core is removed from the remaining core discharge hole 50 by the refill.
In this state, move the writing device B, fold the lower end of the remaining lead, and store it in the remaining lead discharge hole 50.
Move the writing device B again and remove the remaining lead from the remaining lead discharge hole 50.
An automatic drafting machine characterized in that the lead chuck 30 is placed in the upper position, the lead chuck 30 is raised, and the lead chuck 30 is lowered again so that the remaining lead falls into the lead remaining lead discharge hole 50 and is stored therein. How to remove remaining core.