JPH0436319Y2 - - 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 using a writing instrument by moving a writing device equipped with a writing instrument and a paper relative to each other in the X and Y directions.

As a writing device for such an automatic drawing machine, one in which a writing instrument is detachably attached to a carriage that moves in a predetermined direction with a bolt or the like is known.

Problems that the invention aims to solve In such writing devices, it is necessary to replace the writing implement with one with a different core diameter depending on the thickness of the line to be drawn, but at that time, the writing implement must be positioned vertically and placed in the carrier. If you attach the writing instrument with bolts as described above, you will have to hold the writing instrument in place while tightening the bolt, which makes the installation work troublesome, and the writing instrument may be damaged when tightening the bolt. may move slightly up and down, making it impossible to install it correctly in the specified position.

SUMMARY OF THE INVENTION An object of the present invention is to provide a writing device for an automatic drafting machine that allows a writing instrument to be accurately attached to a predetermined position in a carriage with a simple operation.

Means and action for solving the problem A mounting groove is formed on the front surface of the carriage body, and a temporary fixing spring, a clamper, and a positioning piece are provided on the front surface of the carriage body, and the writing instrument case is positioned by tightly fitting into the mounting groove. The case is temporarily held in the mounting groove by a temporary spring, and a writing instrument can be mounted by attaching a clamper while the case is positioned.

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 attached in a snap-type manner so as to face the front surface of the carriage body 11, thereby forming a space 24 therebetween.

That is, as shown in FIG. 9, the locking piece 21a formed on the upper bending plate 21 is engaged with the downward locking recess 11b of the carriage main body 11, and the approximately L-shaped locking piece 21a is attached to the lower part of the vertical plate 20. The hook 20a is engaged with a stopper 11c provided at the lower part of the carriage body 11 to be attached in a snap-type manner, and by pushing a push button 20b and elastically deforming the hook 20a, it can be detached from the stopper 11c 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 between them, 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, 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 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. When the sleeve 42 is raised and the cap 44 comes into contact with the stopper 45, 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.
comes into contact with 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 force is released 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 installed in the mounting groove 13 of the carriage body 11 and temporarily secured by the temporary securing spring 60, and then the clamper 6
1 to the carriage body 11 with a fixing bolt 62 to ensure firm attachment.

That is, a temporary fixing spring 6, which is plate-shaped and curved on both sides in a substantially U-shape, is installed in the intermediate portion 11' between the pair of mounting grooves 13, 13 on the front surface of the carriage main body 11.
A screw 63 is fixed at the middle part of the spring 60 so that the curved parts 60a on both sides slightly face into the mounting groove 13, and the fixing bolt 62 is screwed into the threaded hole 64 formed below the temporary fixing spring 60. case 40 of the pair of writing instruments 5, 5,
It is pressed to 40.

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

Since it is like this, the writing instrument 5 is moved to the carriage 1.
1, fit the case 40 of the writing instrument 5 into the mounting groove 13, hold it temporarily with the curved part 60a of the temporary spring 60, and then attach the case 40 to the mounting groove 1.
3 to cause the positioning portion 55 to interfere with the positioning piece 65.

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 middle portion 11' of the carriage body 11, and its contact piece 68a protrudes slightly in a pair of mounting grooves 13, 13, and is attached to the sleeves of the pair of left and right writing instruments 5, 5. 42, 42, and when the sleeve 42 reaches a predetermined lowering position, that is, the lowest stroke position for feeding out the lead, a limit switch 68 is activated.
is set to ON, so that 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 and drawing a new figure to a sheet of paper on which a predetermined figure has been drawn, the figure drawn on the paper is The pointed end 6b is brought into contact with the position of , and the position of the carriage 4 at this time is recorded 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.

In the above embodiment, the positioning piece 65 is connected to the bolt 66.
However, the positioning piece 65 may be formed integrally with the carriage body 11.

Effect of the invention: The curved portion 60a of the temporary fixing spring 60 slightly protrudes into the mounting groove 13, and the positioning piece 65 fits into the mounting groove 13.
Since the case 40 of the writing instrument 5 is integrally formed with a large-diameter collar 54 that protrudes slightly and fits tightly into the mounting groove 13, the case 40 of the writing instrument 5 can be attached to the carriage body 11.
When fitted into the mounting groove 13 from the front side of the large diameter collar 54
is tightly fitted into the mounting groove 13 without play, and the positioning portion 55 consisting of the large diameter collar 54 can be positioned by contacting the positioning piece 65, and the curved portion 60a of the temporary spring 60 is pressed against the case 40. The case 40 of the writing instrument 5 can be positioned and temporarily fixed on the carriage body 11, and in that state, the clamper 6 can be
1 with a stop bolt 62, the case 40 of the writing instrument 5 can be accurately and easily mounted in the mounting groove 13 of the carriage body 11 while being held at a predetermined position without slight movement.

[Brief explanation of drawings]

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 cross-sectional view taken along line D-D in Fig. 1, and Fig. 3 is a state with the cover attached. Figure 4 is the rear view of the carriage.
Figure 5 is a sectional view taken along line A-A in Figure 3, Figures 6 and 7.
The figures are a sectional view taken along line B-B and line C-C in FIG. 5, FIG. 8 is a plan view, FIG. 9 is a sectional view of the cover attachment part, and FIG. FIG. 11 is a sectional view of the writing instrument. 4 is a carriage, 5 is a writing instrument, 11 is a carriage body, 13 is a mounting groove, 40 is a case, 60 is a temporary spring, 61 is a clamper, and 62 is a stop bolt.

Claims (1)

[Claims for Utility Model Registration] A mounting groove 13 is formed in the front surface of the carriage body 11 in the vertical direction, and the case 40 of the writing instrument 5 is provided with a mounting groove 13.
A large-diameter collar 54 that tightly fits into the mounting groove 13 is integrally formed as a positioning portion 55, and the case 4 of the writing instrument 5 is
0 is mounted with its large diameter flange 54 tightly fitted into the mounting groove 13 to form a gap between the mounting groove 13 and the case 40, and a curved portion 60a is formed on the front surface of the carriage main body 11.
The temporary fixing spring 60 with the curved portion 60
A is mounted so that it slightly faces the mounting groove 13 and comes into pressure contact with the case 40, and a positioning piece 65 is mounted on the front surface of the carriage main body 11 so that it slightly faces the mounting groove 13 and interferes with the positioning part 55. A writing device for an automatic drafting machine, characterized in that a clamper 61 for pressing a carriage body 11 into a mounting groove 13 is removably attached to the front surface of the machine with a stop bolt 62.