JPH0436312Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a writing device using a pencil lead for an automatic drawing machine.

BACKGROUND OF THE INVENTION As a writing device for an automatic drafting machine, one is known in which a writing instrument is attached to a carriage that moves in a predetermined direction and that sequentially feeds out pencil lead.

For example, as shown in Utility Model Publication No. 59-13107,
Insert the pencil lead into the pipe provided in the carriage,
2. Description of the Related Art A writing device is known in which a pencil lead is sequentially pushed out using a core pusher that is moved up and down by a driving roller and a driven roller.

Problems that the invention aims to solve With such a writing device, the pencil lead gradually wears out as you draw, so it is necessary to replenish new pencil lead. The operation of replenishing the pencil lead becomes troublesome.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a writing device for an automatic drafting machine that allows new pencil lead to be easily supplied while the writing instrument remains attached to the carriage.

Means and operation for solving the problem A pipe 41 is slidably inserted into a cylindrical case 40 equipped with a core holder 46.
A core stock 43 is slidably inserted into the pipe 41, and a chuck ring 4 is attached to the tip of the pipe 41.
8, a core chuck 47 is provided at the tip of the core stock 43, and the chuck ring 48 and the core chuck 47 are biased in the direction of separation by a spring 49 to constitute a core chuck mechanism.
3 to form a writing instrument 5 that sequentially feeds out pencil lead by lowering the case 40 as one body, and attaching the case 40 to the carriage body 11, and attaching a mechanism for moving the pipe 41 up and down to the carriage body 11, A stopper 45 consisting of an upper horizontal piece 45b and both vertical pieces 45a, 45a is provided at a position above the pipe 41 and the core stock 43 in the carriage body 11, and the upper horizontal piece 45b faces the upper part of the core stock 43, and the stopper 45 is provided with both vertical pieces. 45a, 45a are mounted so as to face the upper part of the pipe 41 and to be expanded and deformed by the pipe 41, and this stopper 4
A writing device for an automatic drafting machine in which a lead insertion hole 53 that opens into a lead stock 43 is formed in the upper horizontal piece 45b of the drawing device.

As a result, both vertical pieces 45 of the stopper 45
Since the upper part of the pipe 41 comes into contact with a and 45a, when the pipe 41 is moved up and down together with the lead holder 43 to sequentially feed out the pencil lead, the upward stroke of the pipe 41 and the lead holder 43 is controlled by the vertical pieces 45a and 45a on both sides of the stopper 45, respectively. 45a, the pencil lead can be reliably fed out, and when the pipe 41 is raised again by expanding the vertical pieces 45a, 45a on both sides, the upper part of the lead stock 43 comes into contact with the upper horizontal piece 45b of the stopper 45. Then only the pipe 41 rises and the core chuck 4
7 is opened, the pencil leads in the lead stock 43 fall to the lead holder 46, and the pencil leads can be sequentially fed out again. When the pencil lead runs out, it can be replenished by inserting the lead through the lead insertion hole 53 of the upper horizontal piece 45b of the stopper 45.

Embodiment As shown in FIG. 6, the automatic drawing machine has a carriage 4 that is movable along a guide rail 3 horizontally installed between the upper parts of the left frame 1 and the right frame 2, and a pair of writing instruments 5, 5 and the positioning pin 6, and a paper guide 7, an underlay roll 8, and a pair of drive rolls 9, 9 are provided between the lower portions of the left frame 1 and the right frame 2, and are opposed to the pair of drive rolls 9, 9. and press roll 10,10
are arranged respectively, and the paper is conveyed in the Y direction by the drive roll 9 and the push roll 10, and the writing instrument 5 is
is moved along the underlay roll 8 in the X direction.

As shown in FIG. 1, the carriage 4 is composed of a carriage body 11 and a cover body 12. The front surface of the carriage body 11 is a flat surface, and mounting grooves 13 having a substantially semicircular cross section extend vertically from side to side. A pair of upper protruding pieces are formed on the back side.
4, an intermediate recess 15, and a lower protrusion 16 are formed, and a pair of left and right mounting flanges 17, 17 are integrally formed on the left and right sides of the lower protrusion 16, protruding laterally, so that the carriage main body 11 has a symmetrical shape. , a horizontal through hole 18 is provided in the upper part of the left and right side surfaces 11a, 1
1a, and the pair of mounting grooves 13, 1
3, and an opening 19 is formed at the bottom of the mounting groove 13.

A leaf spring 32 is fixed to the upper surface of the upper protruding piece 14 with bolts 33, and a pair of left and right U-shaped brackets 34 are secured to the portions of the leaf spring 32 that protrude from both sides of the upper protruding piece 14 with bolts 35, respectively. In addition, a pair of left and right upper guide rollers 36 are rotatably supported on each of the brackets 34 by pins 37, and a pair of left and right lower guide rollers 38 are supported on the pair of left and right mounting flanges 17 by pins 39. The pair of left and right lower guide rollers 38 are rotatably supported, and are opposed to the pair of left and right upper guide rollers 36.
The upper and lower rail surfaces 3a, 3 of the guide rail 3 are located so as to protrude rearward from the back surface of the carriage main body 11.
In contact with b, the carriage 4 is movably supported on the guide rail 3 by four upper and lower guide rollers 36, 36, 38, and 38 so as to move smoothly in the left and right direction.

The writing instrument 5 has a pipe 4 inside a cylindrical case 40.
1 is slidably inserted into the pipe 41, and a sleeve 42 is integrally provided on the upper part of the pipe 41.
A pipe-shaped lead stock 43 is inserted into the lead stock 43, and a cap 44 is detachably attached to the top of the lead stock 43. A stopper 45 is disposed above the cap 44, and when the sleeve 42 is lowered, the pencil lead is removed from the case. When the sleeve 42 is raised and the cap 44 is brought into contact with the stopper 45, the pencil lead in the lead stock 43 is fed out.

Specifically, as shown in FIG. 2, a lead holder 46 is attached to the tip of the case 40, a lead chuck 47 is attached to the lower part of the lead stock 43, and a lead chuck 47 is attached to the pipe 41.
A chuck ring 48 is fixed to the lower part of the chuck so as to face each other to form a core chuck mechanism.A core chuck 47 is moved and held upward by a spring 49 together with a core stock 41, and the core is fixed by a ball 50 and a slope 48a. When the chuck 47 is reduced and deformed so as to clamp the pencil lead, and the sleeve 42 is moved upward by pushing out the vertical pieces 45a, 45a on both sides of the stopper 45, the cap 44 comes into contact with the upper horizontal piece 45b, and the lead stock 43 is moved upward. stops, only the pipe 41 moves upward, and the chuck ring 48 is moved upward by the spring 4.
9, the lead chuck 47 releases its elastic force to unclamp the pencil lead, and the pencil lead in the lead stock 43 passes through the lead chuck 47. It is arranged so that it is fed down to the core holding bush 46a.

The stopper 45 of the writing instrument 5 is fixed to a mounting piece 67 attached to the carriage body 11, and a lead insertion hole 68 is formed in the mounting piece 67. The core insertion holes 52 and 53 are the same as the core insertion hole 6.
8, and the pencil lead can be inserted into the lead stock 43 and refilled without removing the writing instrument 5 from the carriage body 11.

A plurality of large-diameter flanges 54 are integrally formed on the case 40, and rack teeth 56 are formed on the sleeve 42.

As shown in FIG. 3, the writing instrument 5 is fitted into the mounting groove 13 of the carriage body 11, and is firmly attached by being pressed by a clamper 61 fixed to the carriage body 11 with a stop bolt 62.

A pair of left and right motors 70, 70 are attached to the upper left and right end surfaces of the carriage body 11, and the output shafts 71 of each motor 70 protrude from both ends of the horizontal through hole 18, and the rack teeth 5 of the sleeve 42
One end of the pair of left and right pinions 72, 72 that fit into the pinion 6 are fitted and connected, and the other end of the pair of pinions 72 is rotatable via a bearing (not shown) in the center of the horizontal through hole 18. Supported pinion 7
The left and right motors 70 are covered with left and right covers 74 on their front sides, and the left and right motors 70 are covered with left and right covers 74.
2 constitute a mechanism for moving the pipe 41 up and down. Note that the roller is driven by the motor 70, and the roller is directly pressed against the pipe 41.
It may be made to move up and down.

A locking plate 84 is fixed to the upper surface of the lower protrusion 16 of the carriage body 11 with bolts 85, and the locking plate 84 presses and fixes a cable 86, and this cable 86 is connected to a stepping motor (not shown) or the like. The carriage is reciprocated from side to side with
It is designed to run left and right.

The cover body 12 can be attached to and detached from the carriage body 11, and a presser body 27 is mounted inside the cover body 12 with a spring 29.
When the cover body 12 is attached to the carriage body 11, the pressing surface 32 of the presser body 27 comes into pressure contact with the sleeve 42.

The positioning pin 6 is vertically movably supported in a holder 80 attached to the end surface of the carriage body 11, and is urged upward by a spring 81.
When the upper part 6a is pressed, the pointed end 6b comes into contact with the underlay roll 8, and when adding a new figure to a sheet of paper on which a predetermined figure has been drawn, it is placed in the position of the figure drawn on the sheet of paper. The pointed end 6b is brought into contact with the carriage 4, and the position of the carriage 4 at this time is written on the controller, so that when drawing a new figure, that position is used as the origin.

The guide rail 3 is connected by bolts 83 to a board 82 that is horizontally suspended between the left frame 1 and the right frame 2.

Effect of the invention Since the upper part of the pipe 41 comes into contact with the longitudinal deflections 45a and 45a on both sides of the stopper 45, when the pipe 41 is moved up and down together with the lead holder 43 to sequentially feed out the pencil lead, the upward stroke of the pipe 41 and the lead holder 43 is reduced. Both vertical pieces 45a, 45a of the stopper 45
This prevents the pencil lead from rising more than necessary, making it possible to reliably feed out the pencil lead.Moreover, when the pipe 41 is raised again by expanding the vertical pieces 45a, 45a on both sides, the upper part of the lead stock 43 is held against the stopper 45. When it comes into contact with the upper horizontal piece 45b, only the pipe 41 rises and the lead chuck 47 is released, allowing the pencil leads in the lead stock 43 to fall to the lead holder 46, allowing the pencil leads to be fed out one after another again, and the lead chuck 47 being stocked in the lead stock 43. A plurality of pencil leads can be continuously and sequentially fed out, and when the pencil lead runs out in the lead stock 43, it can be replenished by inserting the lead through the lead insertion hole 53 of the upper horizontal piece 45b of the stopper 45.

Therefore, with the writing instrument 5 attached to the carriage main body 11, a plurality of pencil leads in the lead stock 43 can be continuously and sequentially fed out.
You can easily replenish new pencil lead within 3 seconds.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view taken along the line A-A in FIG. 3, FIG. 2 is a sectional view of the writing instrument, FIG. 3 is a front view of the carriage, and FIG. FIG. 5 is a plan view, and FIG. 6 is a schematic perspective view of the entire automatic drafting machine. 5 is a writing instrument, 11 is a cartridge body, 40 is a case, 41 is a pipe, 43 is a lead stock, 45 is a stopper, 46 is a lead holder, 47 is a lead chuck, and 48 is a chuck ring.

Claims (1)

[Scope of utility model registration request] A pipe 41 is slidably inserted into a cylindrical case 40 equipped with a core holder 46.
A core stock 43 is slidably inserted into the pipe 41, and a chuck ring 4 is attached to the tip of the pipe 41.
8, a core chuck 47 is provided at the tip of the core stock 43, and the chuck ring 48 and the core chuck 47 are biased in the direction of separation by a spring 49 to constitute a core chuck mechanism.
3 to form a writing instrument 5 that sequentially feeds out pencil lead by lowering the case 40 as one body, and attaching the case 40 to the carriage body 11, and attaching a mechanism for moving the pipe 41 up and down to the carriage body 11, A stopper 45 consisting of an upper horizontal piece 45b and both vertical pieces 45a, 45a is provided at a position above the pipe 41 and the core stock 43 in the carriage body 11, and the upper horizontal piece 45b faces the upper part of the core stock 43, and the stopper 45 is provided with both vertical pieces. 45a, 45a are mounted so as to face the upper part of the pipe 41 and to be expanded and deformed by the pipe 41, and this stopper 4
A writing device for an automatic drafting machine, characterized in that a lead insertion hole 53 that opens into a lead stock 43 is formed in the upper horizontal piece 45b of the drawing machine.