JPH0436307Y2 - - Google Patents

Description

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

2. Description of the Related Art An automatic drawing machine draws a drawing on a paper by moving a writing device equipped with a writing instrument and paper relatively in the X and Y directions. It is known that when drawing, the writing instrument is pressed against the paper, and when not drawing, the carriage is moved so that the writing instrument is not separated from the paper.

Problems to be Solved by the Invention With such a writing device, it is necessary to replace the writing instrument with a different one depending on the thickness of the line being drawn, and it is preferable that the writing instrument be able to move up and down smoothly. With conventional writing devices, it may be troublesome to replace the writing instrument, or the writing instrument may not be able to be moved up and down smoothly.

Therefore, the present invention not only allows you to easily replace the writing instrument, but also allows you to move the writing instrument up and down smoothly.
To provide a writing device for an automatic drafting machine in which drawings can be drawn by attaching book writing instruments and pressing them alternately against paper.

Means and Effects for Solving the Problem A pair of writing instruments each having a case and a vertically movable sleeve for feeding out a lead are arranged side by side on a carriage body using a clamper, and the sleeve is attached to a cover body which is detachably attached to the carriage body. A pair of presser bodies are provided for guiding the sleeves, and a pair of pinions driven by a pair of motors and meshed with the rack teeth of each sleeve are provided on the carriage body, and contact pieces facing the pair of sleeves are provided on the carriage body. Install a limit switch with
By attaching the cover body, the sleeves of the pair of writing instruments can be guided, and the pair of writing instruments can be attached to the carriage body with one clamper, and the lowering end of the sleeve of the pair of writing instruments can be detected with one limit switch. It is something.

Embodiment As shown in FIG. 10, the automatic drafting machine has a carriage 4 that is movable along a guide rail 3 that extends horizontally between the upper parts of a left frame 1 and a right frame 2, and a pair of writing instruments 5, 5 and the positioning pin 6, and also insert the paper guide 7 and the underlay roll 8 between the lower parts of the left frame 1 and the right frame 2.
and a pair of drive rolls 9, 9 are provided, and push rolls 10, 1 are provided opposite to the pair of drive rolls 9, 9.
0 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 moved in the X direction along the underlay roll 8.

As shown in FIG. 5, 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 a mounting groove 13 having a substantially semicircular cross section extends 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.

The cover body 12 has upper and lower vertically bent plates 21, 22, 23, 23 integrally formed on the periphery of a vertical plate 20;
3 is removably mounted in a stepwise manner so as to face the front surface of the carriage body 11, thereby forming a space 24 between the cartridge body 11 and the front surface of the carriage body 11. That is, as shown in FIG. The shaped hook 20a is engaged with the stopper 11c provided at the lower part of the carriage body 11 and attached in a snap-type manner, and the stopper 11c is attached by pressing the push button 20b and elastically deforming the hook 20a.
It is designed so that it can be detached and removed. Semicircular notches 21a and 22a facing the mounting groove 13 are formed in the upper and lower bent plates 21 and 22 to form circular holes 25, respectively, and the left and right vertical bent plates 2
A support shaft 26 is horizontally suspended between 3 and 23, and this support shaft 26
The through holes 28 of the left and right pair of presser bodies 27, 27 are loosely fitted with a gap, and the presser body 27 is biased to swing toward the carriage body 11 by a spring 29, and the pair of protruding pieces 30 , 30 is opposed to the opening 19.

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, 38, 38, and 38, and is configured 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 core stock 43 is inserted into the core stock 43, and a cap 44 is detachably attached to the upper part of the core stock 43. A stopper 45 is disposed above the cap 44, and when the sleeve 42 is lowered, the core is moved to the case 40. The sleeve 42 is gradually unrolled.
When the cap 44 is brought into contact with the stopper 45 by pressing , the refill in the lead stock 43 is fed out.

Specifically, as shown in FIG.
A lead holder 46 is attached to the tip of the pipe 4, and a lead chuck 47 is attached to the lower part of the lead stock 43.
Chuck rings 48 are fixed to the lower part of the chuck 1, facing each other, and the core chuck 47 is moved and held upward by a spring 49 together with the core stock 41, and the core chuck 47 is moved and held by the ball 50 and the slope 48a.
is reduced and deformed so as to clamp the core, and the sleeve 42 is attached to both vertical pieces 45a, 4 of the stopper 45.
Push out 5a and move upward to reach cap 44.
contacts the upper horizontal piece 45b, the core stock 43 stops, and only the pipe 41 moves upward, and the chuck ring 48 moves upward against the core chuck 47 against the spring 49, causing the core chuck 47 to become elastic. When the lead is opened by force and the lead is unclamped, the refill in the lead stock 43 is supplied falling through the lead chuck 47 to the lead holding bush 46a so that the lead can be replaced. The upper horizontal piece 45b of 45 has core insertion holes 52, 5.
3 is formed so that the lead can be supplied to the lead stock 43 with the writing instrument 5 attached to the carriage 4, and a large diameter collar 54 is integrally formed on the case 40 to form a positioning part 55, and the sleeve 42 is provided with a lock tooth 56.

As shown in FIG. 1, the writing instrument 5 is mounted in the mounting groove 13 of the carriage body 11 and temporarily fixed by a temporary fixing spring 60, and then the clamper 6
1 to the carriage main body 11 with a fixing bolt 62 for firm installation.

That is, the intermediate portion of a temporary fixing spring 60, which is plate-shaped and curved in a substantially V-shape on both sides, is fixed with a screw 63 to the intermediate portion 11' between the pair of mounting grooves 13 and 13 on the front surface of the carriage body 11. The curved portion 60a on the side slightly faces into the mounting groove 13, and a set bolt 62 is screwed into a screw hole 64 formed below the temporary fixing spring 60 to attach the clamper 61 to the pair of writing instruments 5, Case 4 of 5
It is pressed to 0.40.

Further, positioning pieces 65 are fixed to the left and right end surfaces of the carriage body 11 with screws 66, and the positioning pieces 65 slightly protrude toward the mounting groove 13 to interfere with the positioning portion 55 of the case 40.

Therefore, in order to attach the writing instrument 5 to the carriage main body 11, the case 40 of the writing instrument 5 is fitted into the mounting groove 13, temporarily held by the curved portion 60a of the temporary fixing spring 60, and the case 40 is attached. The positioning portion 55 is caused to interfere with the positioning piece 65 by sliding downward along the groove 13.

Thereby, the writing instrument 5 is positioned in the vertical direction and temporarily held accurately at a predetermined position.

In this state, the clamper 61 is attached with the fixing bolt 62 and the case 40 is pressed to firmly attach the writing instrument 5.

Therefore, the pair of writing instruments 5, 5 can be positioned and firmly attached using one temporary fixing spring 60 and clamper 61.

The stopper 45 is attached to a mounting piece 67 attached to the upper part of the carriage body 11, and
A limit switch 68 is attached to a position above the temporary fixing spring 60 in the intermediate portion 11' of the carriage body 11, and its contact piece 68a is longer than the main body of the switch 68, and both ends thereof are connected to a pair of mounting grooves 13. , 13, respectively, and face the sleeves 42, 42 of the pair of left and right writing instruments 5, 5, respectively, and when the sleeve 42 reaches a predetermined lowering position, that is, the lowest stroke position for feeding out the lead, the limit switch 68 is turned on. One limit switch 68 can be used for two writing instruments 5.

A pair of left and right motors 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 mesh with the bearing 7 is fitted and connected, and the other end of the pair of pinions 72 is connected to the bearing 7 at the center of the horizontal through hole 18.
3 and 73, the pinion 72 is supported on both sides so that it does not become oblique in the axial direction even when pressed against the rack teeth 56.
The front sides of the left and right motors 70 are covered with left and right covers 74.

In this way, since the heavy motor 70 is attached to the end face of the carriage body 11 facing laterally and is at approximately the same height as the upper guide roller 36, the left-right balance of the carriage body 11 is stabilized. In addition, the center of gravity is located downward and toward the rear, allowing the carriage 4 to move smoothly from side to side.

Furthermore, when the cover body 12 is attached, the presser body 27 is pushed by the spring 29, and the pair of protruding pieces 30, 30 come into contact with the front surface of the carriage body 11, and the presser surface 3
1 abuts against the sleeve 42, and the sleeve 42 of the writing instrument 5 is guided by the rack teeth 56 and pinion 72 to move up and down smoothly.

At this time, there is a gap between the through hole 28 of the presser body 27 and the support shaft 26, and the presser body 27 can be freely displaced with respect to the support shaft 26, so even if there is an installation error, the pair of protruding pieces 30, 30 and the holding surface 31 can be brought into uniform contact with the front surface of the carriage body 11 and 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.

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 4 is reciprocated from side to side.
It is designed to run left and right.

Effects of the invention The pair of writing instruments 5, 5 can be attached and fixed to the carriage body 11 with one clamper 61, and the sleeve 42 of the writing instrument 5 can be guided by the pair of pressers 27, 27 provided on the cover body 12, respectively. The sleeve 4 of the writing instrument 5, 5 that moves up and down
2 and 42 can be guided by attaching the cover body 12, and by removing the cover body 12 and one clamper 61, the pair of writing instruments can be replaced.

Therefore, the writing instrument 5 can be easily replaced, and the sleeve 42 can be guided to move up and down smoothly.

In addition, by installing a pair of writing instruments 5, 5 in parallel in the carriage 4 and lowering the sleeve 42, the lead can be drawn out and pressed against the paper, and the lead of either writing instrument can be pressed against the paper to draw. Lines of different thickness can be drawn without replacing the 5.

Further, since the lowering end of the sleeve 42 of the pair of writing instruments 5 can be detected by one limit switch 68, wiring etc. can be simplified.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a front view of the carriage with the cover removed, Fig. 2 is a sectional view taken along line D-D in Fig. 1, and Fig. 3 is a view of the carriage with the cover attached. The front view of the carriage, Figure 4 is the rear view, and Figure 5 is the rear view.
The figure is a cross-sectional view taken along line A-A in Figure 3, Figures 6 and 7 are cross-sectional views taken along line B-B and CC in Figure 5, Figure 8 is a plan view, and Figure 9 is a cover body. Cross-sectional view of the mounting part, No. 10
The figure is a schematic perspective view of the automatic drawing machine, and FIG. 11 is a sectional view of the writing instrument. 4 is a carriage, 5 is a writing instrument, 11 is a carriage body, 12 is a cover body, 13 is a mounting groove, 27 is a presser body, 40 is a case, 42 is a sleeve, 61 is a clamper, 62 is a stop bolt, 68 is a limit switch, 68a is a contact piece.

Claims (1)

[Scope of utility model registration request] A pair of mounting grooves 1 having a shape and size into which the case 40 of the writing instrument 5 fits into the front surface of the carriage body 11.
3 and 13 are formed in parallel, and a clamper 61 that spans between the pair of mounting grooves 13 and 13 is attached to the front surface of the carriage body 11 with a stop bolt 62, and the cover body 12 is freely attachable and detachable to the front surface of the carriage body 11. The cover body 12 is provided with a pair of presser bodies 27, 27 for guiding the vertically moving lead feeding sleeves 42, 42 of the pair of writing instruments 5, 5, respectively, to form the carriage 4. 11, a sleeve 42 for feeding each core;
A pair of pinions 72, 72 meshing with the 42 rack teeth 56, 56, respectively, and each pinion 7
A pair of motors 7 that rotationally drive motors 2 and 72, respectively.
0, 70, and a limit switch 68 is attached to the carriage main body 11 so that its contact piece 68a faces the pair of sleeves 42, 42, respectively.