JPH0120156Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vertical rail tail support device for a rail type universal parallel ruler.

The main purpose of the present invention is to reduce the rotational moment about the longitudinal axis of the vertical rail due to the weight of the head in a rail-type flexible parallel ruler, etc. by using the repulsive force of magnetic force, and to bring the tail of the vertical rail onto the drawing surface. The objective is to completely levitate the vertical rail, thereby making it possible to move the vertical rail with a light force.

The configuration of the present invention will be described in detail below with reference to embodiments shown in the accompanying drawings.

2 is a drawing board, and 4 is a horizontal rail fixed to the upper edge of the drawing board 2. As shown in FIG. 6, horizontal rail surfaces 6, 8, vertical rail surfaces 10,
12 are formed. 14 is a horizontal cursor, and there are vertical cursors 16, horizontal cursors 18 and 2.
0, the safety roller 22 is rotatably supported.

The vertical rollers 16 are in contact with the horizontal rail surface 6, and the horizontal rollers 18 and 20 are in contact with the vertical rail surface 1.
0 and 12, and the safety roller 22 is moved against the horizontal rail surface 7 by the repulsive force of magnets 24 and 32, which will be described later.
It is floating at a slight distance from the sky. A magnet 24 made of a plurality of elongated magnetic rubbers with a square cross section is fixed to the horizontal rail 4. Reference numeral 26 denotes a bracket, the lower end of which is supported by a shaft 18a on the horizontal cursor 14 so as to be rotatable about an axis parallel to the horizontal rail 4, and one end of a vertical rail 30 is fixed to the upper part. A magnet 32 is fixed to the bracket 26 and has the same structure as the magnet 24, and has the same polar surface facing the magnet 24. 34 is roller 36, 38, 40,
The vertical cursor 34 is movably attached to the vertical rail 30 via a head 42, and a head 46 is connected to the vertical cursor 34 via a known head floating mechanism 44. Straight edges 48 and 50 are removably fixed to the mounting plate of the head 46.
52 is a cover fixed to the tail of the vertical rail 30, a frame 54 is fixed to this, and an adjustment plate 60 is attached to the shafts of screws 56 and 58 that are screwed into screw holes drilled in the frame 54. The elongated holes 62 and 64 are slidably fitted together. Reference numeral 66 denotes a support frame fixed to the adjustment plate 60 by a screw 68 so as to be able to be finely adjusted in a direction perpendicular to the two planes of the drawing board, and the horizontal portion 66a of this
The upper right end in FIG. 4 protrudes from the vertical rail 30 in a direction perpendicular to the mounting side of the head 46.
Reference numeral 70 denotes a magnet made of a plurality of flexible magnetic rubbers having a square cross section, which are fitted into grooves formed in the horizontal portion 66a, and are arranged to fit into the grooves formed in the horizontal portion 66a.
The left end of the magnet 70 in FIG. are estranged. Reference numeral 72 denotes a fixed rail fixed to the lower edge of the drawing board 2 so as to be parallel to the horizontal rail 4, and a plurality of elongated magnetic rubbers with square cross sections are inserted into grooves formed on the upper surface of the fixed rail. A magnet 74 consisting of the above is arranged in a fitted manner.
The magnets 74 and 70 have the same polar surfaces facing each other, and the magnet 7
A repulsive force is acting between 4 and 70. 76
is a safety roller, which is rotatably supported by the support frame 66, and the surface of the roller 76 is connected to the magnets 74 and 7.
It floats slightly above the surface of the rail 72 due to the repulsive magnetic force of 0.

In addition, loosen the screws 56 and 58 and adjust the adjustment plate 60.
The magnet 7 slides along the longitudinal direction of the vertical rail 30.
The magnetic pole face of the magnet 74 can be precisely adjusted to a position where the same pole faces the magnetic pole face of the magnet 74. After making the above fine adjustment, the adjusting plate 60 is fixed to the frame 54 by tightening the screws 56 and 58. Incidentally, when implementing the present invention, any mechanism may be used for the head floating mechanism 44.

Next, the operation of this embodiment will be explained.

If you grasp the handle of the head 46 with your hand and apply force to it in any direction parallel to the two surfaces of the drawing board,
The horizontal cursor 14 moves along the horizontal rail 4, and the vertical cursor 34 moves along the vertical rail 30, allowing the head 46 to be moved in a desired direction. When the vertical rail 30 moves in the left and right directions in FIGS.
It floats completely on the two surfaces of the drawing board and moves without receiving any contact friction. As shown in FIG. 2, when the floating mechanism 44 is operated to hold the head 46 in a state floating above the drawing board 2, the head 46
6 is applied to the vertical rail 30, and the vertical rail 30
In Fig. 2, centering on its longitudinal axis,
A rotational moment acts in the direction of rotation of the hour hand. On the other hand, the magnetic force of the magnet 74 acts on the magnet 70 in the levitation direction, and the levitation force of the magnet 70 also acts as a rotational moment on the vertical rail 30 in the counterclockwise rotational direction about its longitudinal axis. This rotational moment in the counter-rotational direction of the hour hand moves in a direction that cancels out the rotational moment in the rotational direction of the hour hand. When both rotational moments are completely canceled out, the rotational moment acting on the vertical rail 30 when the head 46 is floating becomes zero, and no twisting force is generated on the rollers 18, 20 of the horizontal cursor 14. When the head 46 is placed on the two sides of the drawing board as shown in FIG. 3, the weight of the head 46 does not act on the vertical rail 30 as a rotational force.
In this case, due to the repulsive force between the magnets 70 and 74, the vertical rail 30 is biased in the counterclockwise direction of rotation of the hour hand in FIG. It acts on the rollers 18 and 20 of 14 as a twisting force. In this case horizontal cursor 1
4 along the horizontal rail 4 becomes heavy due to the above-mentioned twisting force. In this embodiment, magnets 70 and 7
The magnitude of the rotational force acting on the vertical rail 30 in the counterclockwise direction of rotation of the hour hand in FIG. The amount of eccentricity of the magnet 70 with respect to the center of the vertical rail 30 is set so as to have a strength that is approximately 50% of the strength that is exactly equal to the strength of the rotational force acting in the hour hand rotation direction. Of course, the degree to which the center of the repulsive magnetic force by the magnets 70 and 74 is eccentric with respect to the center of the vertical rail 30 may be such that the vertical rail 30 is perfectly balanced when the head 46 is floating.

Incidentally, the present invention can also be used in a rail-type coordinate analyzer.

Since the present invention is configured as described above, the rotational force acting on the vertical rail due to the weight of the head is reduced by the repulsive magnetic force of the magnet, so the vertical rail can be moved smoothly and quietly with a light force. There are effects that can be achieved.

[Brief explanation of the drawing]

The figures show preferred embodiments of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a side view of the head, Fig. 3 is an explanatory view of the operation, Fig. 4 is a front view, and Fig. 5 is a side view. , FIG. 6 is a side view. 2...Drawing board, 4...Horizontal rail, 6,8...Horizontal rail surface, 14...Horizontal cursor, 16...Vertical roller, 18,20...Horizontal roller, 22...Safety roller, 24... Magnet, 30...Vertical rail, 3
2...Magnet, 34...Vertical cursor, 44...Head floating mechanism, 46...Head, 48,
50... Straight ruler, 54... Frame, 56, 58...
Screw, 60... Adjustment plate, 62, 64... Long hole, 6
6... Support frame, 68... Screw, 70... Magnet, 7
2...Fixed rail, 74...Magnet.

Claims (1)

[Scope of utility model registration request] A drawing board 2, a horizontal rail 4 disposed on the upper edge of the drawing board 2, a horizontal cursor 14 movably attached to the horizontal rail 4, and a horizontal rail 4 disposed on the horizontal cursor 14.
A vertical rail 30 whose one end is rotatably connected around an axis parallel to the vertical rail 30, a vertical cursor 34 movably attached to the vertical rail 30, and a head floating mechanism 44 attached to the vertical cursor 34. In a rail-type flexible parallel ruler or the like consisting of a parallel head 46, a magnet 74 is disposed at the lower edge of the drawing board 2 in a direction parallel to the horizontal rail 4, while a magnet 74 is disposed at the tail of the vertical rail 30 in a direction opposite to the magnet 74. A magnet 70 is arranged so that the tail of the vertical rail 30 is completely levitated with respect to the two surfaces of the drawing board by the repulsive force of both the magnets 70 and 74, and the magnet on the tail side of the vertical rail 30 is 70 is made to protrude to the side of the head mounting side of the vertical rail 30, and the center of the repulsive magnetic force of both the magnets 70, 74 is
A vertical rail tail support device characterized in that the head 46 is eccentric with respect to the center of the vertical rail 30 in the mounting side direction.