JPH05388Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a head height adjustment device for an automatic drafting machine.

Conventionally, in this type of device, the height of the head can be adjusted by rotating a screw rod to raise and lower a nut member screwed into the screw rod along the screw rod. This is done by raising and lowering the head, but this method has a drawback in that it takes time to rotate the screw rod when the height of the head relative to the table surface is largely adjusted.

The object of the present invention is to provide a head height adjusting device that eliminates the above-mentioned defects.

The configuration of the present invention will be described in detail below based on embodiments shown in the accompanying drawings.

In FIG. 1, 2 is an automatic drawing machine, and X rails 6 and 8 are fixedly installed on both sides of a table 4.
X cursors 10 and 12 are movably attached to rails 6 and 8. Said X cursor 10, 12
is set to X by a command from a controller (not shown).
When the motors 14 and 16 are driven, the X rail 6,
8. 18
is a Y rail installed between the X cursors 10 and 12, to which the Y cursor 20 is movably attached via known rollers (not shown). Y motor 2 fixed to the Y cursor 20
A pinion 22a is fixed to the output shaft of Y rail 18, and the pinion 22 meshes with a rack gear 24 fixedly provided along the Y rail 18. Said Y cursor 2
0 is configured to move along the Y rail 18 when the Y motor 22 is driven by a command from the controller. The back side of a head mounting plate 26 is fixed to one side of the Y cursor 20 with a screw. Projections 26a and 26b are formed on both sides of the front side of the head mounting plate 26,
An inclined surface 26c is formed on one of the protrusions 26a. A guide plate 30 is fixed to the surface of the protrusion 26b. 32 is a presser rod disposed in a recess 34 surrounded by the guide plate 30, the side surface of the protrusion 26b, and the surface of the head mounting plate 26;
An inclined surface 32a is formed on the side surface facing the protrusion 26a. As shown in FIG. 4, stepped horizontal holes 36, 38 are bored in the protrusion 26b, and threaded rods 40, 42 are slidably inserted into the horizontal holes 36, 38. is screwed into a screw hole formed in the presser rod 32. The heads of the screw rods 40 and 42 are connected to the horizontal hole 3.
The presser rod 32 is urged outward by the coil springs disposed within the ridges 6 and 38, and due to the elastic force, the presser rod 32 is brought into close contact with the side surface of the protrusion 26b.
The surface of the head mounting plate 26, the protrusion 26a, and the presser rod 32 constitute a head holding portion 44 that holds the head 46 so as to be movable up and down. The protrusion 26
A plurality of screw holes opening on both sides are formed in b, and a screw rod 50 with a head fixing molding 48 is screwed into the screw holes, and the screw rod 50 is connected to the presser rod 3.
It faces the other side of 2. A recess is formed on the surface of the head mounting plate 26, and lifting guides 52, 54 are fixed to the head mounting plate 26 by screws at both sides of the recess.
An elongated elevating member 56 is slidably fitted between the elevating guides 52 and 54. A guide hole 58 is formed in the elevating member 56 along its longitudinal direction, and a stopper 6 is inserted into the guide hole 58.
0 is placed. The L-shaped walls formed on both sides of the stopper 60 are slidably abutted against the walls of the elevating member 56 on both sides of the guide hole 58. The stopper 60 has a mounting surface 60a on which the lower surface of the head 46 is mounted. Reference numeral 62 denotes a shaft body rotatably inserted in a fixed position into a hole formed in the elevating member 56 and a top plate 64 fixed to the upper surface thereof, and a height fine adjustment molding 66 is provided at the upper end of this shaft body. A shaft body 68 is fixed, and a threaded portion is formed in the lower part of the shaft body 62. The threaded portion of the shaft body 62 is screwed into a threaded hole formed in the stopper 60. Reference numeral 70 denotes a support body located at the lower end of the guide hole 58 and fixed to the elevating member 56, and the lower end of the shaft body 62 is rotatably supported in a recess opening on the upper surface of the support body via a thrust bearing. ing. 72 is the protrusion 2
This is a shaft-shaped stopper for temporarily supporting the head 46, which is slidably inserted into a horizontal hole provided in the protrusion 6a, and its tip protrudes a predetermined length from the inclined surface of the protrusion 26a. A microscope mounting plate 74 is fixed to the head mounting plate 26, and a horizontal hole is formed in the upper part of the microscope mounting plate, and the stopper 72 is slidably inserted into the tube inserted into the horizontal hole. A ring fitted onto the head is in elastic contact with the outer surface of the head mounting plate 26 by the elastic force of the coil spring. A board 74 is fixed to the upper end of the head mounting plate 26 by bolts 76, and an index indexing plate 78 is fitted into the recessed part of the board, and the indexing plate 78 is fixed to the board 74 by the bolts. has been done. Index recesses 80 consisting of V-grooves are bored at predetermined angles in the arcuate outer periphery of the index plate 78. A numerical value corresponding to the thickness of the object to be imaged is displayed in each of the index recesses 80. Reference numeral 82 denotes a clamp handle consisting of an L-shaped arm member, the bent portion of which is rotatably supported by a shaft 84 at the lower part of the index plate 78. A roller 86 is rotatably supported at one end of the clamp handle 82, and the surface of the roller 86 is connected to the lifting member 5.
Engagement surface 56a consisting of the lower surface of the protrusion formed in 6
is in contact with.

In FIG. 6, reference numeral 88 denotes a pin holder fixed to the upper part of the clamp handle 82, into which an index pin 90 with a knob 90a is slidably inserted.
The lower end of 0 is formed into a tapered shape suitable for fitting into the index recess 80. The index pin 90 is moved by a coil spring disposed within the pin holder 88 as shown in FIG.
It is biased in the direction of protruding downward. 92 is a guide pin fixed to the clamp handle 82, and the guide pin 92 is connected to the index plate 7.
It is slidably inserted into an arc-shaped guide hole provided at 8. Reference numeral 94 designates a rotation stop pin fixed to the index pin 90, and is slidably inserted into the elongated hole of the clamp handle 82.
A known head 46 holds a plurality of pens 96. A mounting protrusion 46a is formed on the back side of the head 46, and sloped surfaces are formed on both sides of the protrusion 46a. Note that the head mounting plate 26 may be formed integrally with the Y cursor 20. In addition, in FIG. 3, 102 is a microscope holder,
104 is a microscope for right-angle checking.

Next, the operation of this embodiment will be explained.

After selecting the desired head 46 from various heads, the head 46 is attached to the head mounting plate 26 by first loosening the head fixing moldings 48, 48. Next, the protrusion 46a of the head 46 is inserted from above the head mounting plate 26 by fitting the protrusion 26a and the pressing rod 3.
When the head 46 is lowered along the inclined surfaces 26c and 32a, the lower surface of the projection 46a of the head 46 contacts the stopper 72.
When the head 46 hits the stopper 72, it is stopped by the stopper 72. Next, the thickness of the workpiece 100 on the table 4 is confirmed. Next, the knob 90a is picked up by hand and the clamp handle 82 is rotated to the desired position around the shaft 84. Then, when the thickness of the workpiece 100 is 10 mm, the index pin 9 is inserted into the index recess 80 on which the number 10 is displayed.
0 is fitted into the head 46. The clamp handle 82 swings about the shaft 84, causing the lifting member 56 to move up and down along the guides 52, 54, following the rollers 86. Next, while holding the head 46 by hand, the knob of the stopper 72 is pulled, and the tip of the stopper 72 is retracted from the position where it engages with the lower surface of the protrusion 46a of the head 46, and in this state the head 46 is lowered.
The lower surface of the head projection 46a is placed on the placement surface 60a of the stopper 60. In this state, the pen 96
The distance between the bottom end of the pen 96 and the top surface of the drawing object 100 is set to an approximately preset value, but there is a slight difference in height from the preset value. Therefore, the height fine adjustment molding 66 is rotated to rotate the shaft 62, and the stopper 60 is finely adjusted in the up-down direction, so that the distance between the pen 96 and the drawing object 100 exactly matches the preset value. Next, the moldings 48, 48 are rotated in the tightening direction to press the pressing rod 32 with the tip of the threaded rods 50, 50, and the inclined surface 32a of the pressing rod 32 is brought into contact with the protrusion 46a of the head 46.
The head 46 is fixed to the head mounting plate 26 by pressing against the inclined side of the head 46 .

Incidentally, the index indexing plate 78 and the index pin 90 constitute a fixing means for fixing the clamp handle 82 to the head mounting plate 26 side, and this means is not particularly limited to the configuration of the illustrated embodiment. .

As mentioned above, the present invention allows the height of the head to be adjusted by both the rocking motion of the clamp handle and the rotating motion of the shaft, so it is possible to quickly adjust the height of the head over a wide range. This has the advantage that the height of the head can be adjusted accurately.

[Brief explanation of the drawing]

The figures show preferred embodiments of the present invention, in which Fig. 1 is a plan view, Fig. 2 is a side view, Fig. 3 is an external view, Fig. 4 is a front view, Fig. 5 is a side sectional view, and Fig. 6 is a side view. The figure is a side sectional view, and FIG. 7 is a plan view. 2... Automatic drawing machine, 4... Table, 6, 8...
...X rail, 10, 12...X cursor, 14,
16...X motor, 18...Y rail, 20...
Y cursor, 22...pinion, 24...rack gear, 26...head mounting plate, 26a, 26b...
...projection, 26c...slanted surface, 30...guide plate,
32... Presser rod, 34... Recessed part, 36, 38...
...Side hole, 40, 42... Threaded rod, 44... Head holding part, 46... Head, 48... Head fixing molding, 50... Threaded rod, 52, 54... Lifting guide, 56... Lifting member, 58... Guide hole, 60...
... Stopper, 62 ... Shaft body, 64 ... Top plate, 6
6... Height fine adjustment molding, 68... Shaft body, 70
... Support body, 72 ... Stopper, 74 ... Board, 76 ... Bolt, 78 ... Index indexing plate, 80 ... Index recess, 82 ... Clamp handle, 84 ... Shaft, 86 ... Roller, 8
8...Pin holder, 90a...Knob, 90...
...Index pin, 92...Guide pin, 96
...Pen, 100...Object to be drawn.

Claims (1)

[Scope of utility model registration request] Fix the head mounting plate 26 to the Y cursor 20,
An elevating member 56 is attached to the head mounting plate 26 so as to be movable up and down, a head holding portion 44 for holding the head 46 so as to be movable up and down is provided on the head mounting plate 26, and a shaft body 62 is rotatably supported on the elevating member 56. , screwing the threaded portion of the shaft body 62 into a screw hole of a stopper 60 attached to the elevating member 56 so as to be movable up and down;
A mounting surface 60a for mounting the head 46 is formed on the stopper 60, and a middle portion of a clamp handle 82 is rotatably supported on the head mounting plate 26 side, and one of the clamp handles 82 is moved up and down. The clamp handle 82 is slidably abutted on the engagement surface 56a of the member 56 and is located between the clamp handle 82 and the head mounting plate 26 side.
1. A head height adjustment device for an automatic drafting machine, characterized in that a fixing means for fixing the head to the head mounting plate 26 side is provided.