JPH0129159B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device in which the moving load of a cursor of a rail-type flexible parallel ruler, coordinate analyzer, etc. is reduced by the magnetic levitation force of a magnetic material. A recessed part for insertion is formed, and a cover plate is removably attached to the recessed part to protect the magnetic material, improve the appearance of the rail member, and remove floating dust such as iron powder that adheres to the magnetic material. The purpose is to make it easy to perform.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be explained in detail below with reference to an embodiment of a rail type universal parallel ruler shown in the accompanying drawings.

2 is a drawing board, and 4 is a horizontal rail made of drawn aluminum that is fixed to the upper edge of the drawing board 2 via a vise-type fixture 6, and is used for inserting magnetic material over the entire length of this rail. A recessed portion 8 is formed.
Reference numeral 10 denotes a band-shaped iron plate inserted into the recessed part 8, the lower surface of which is in close contact with the bottom surface of the recessed part 8, and both sides of the iron plate 10 are recessed at the lower end of the side wall forming the recessed part 8. It is tightly fitted into grooves 12 and 14 bored over the entire length of the entry portion 8. Reference numeral 16 denotes a magnetic body consisting of five strip-shaped magnetic rubbers press-fitted into the recessed part 8 over its entire length, and these are arranged in parallel so that different poles are adjacent to each other, and each lower surface is connected to the iron plate. It is adsorbed to 10. The magnetic body 16
Both side portions of are fitted into grooves formed within the recessed portion 8. Reference numeral 18 denotes a cover plate disposed over the entire length of the recessed part 8 , a protrusion 18 a of this is in elastic contact with the upper surface of the magnetic body 16 , and both side parts are in contact with the horizontal surfaces 8 a and 8 of the recessed part 8 .
It is in elastic contact with a. 20 is a horizontal cursor, and a horizontal guide roller 2 is rotatably supported on the horizontal cursor.
2 and 24 are in contact with a vertical rail surface formed along the longitudinal direction of the horizontal rail 4. A vertical guide roller 26 is rotatably supported by the horizontal cursor 20, and the surface thereof is in contact with a horizontal rail surface formed along the longitudinal direction of the horizontal rail 4. Reference numeral 28 denotes a safety roller, which faces the horizontal rail surface formed over the entire length of the horizontal rail 4 in the longitudinal direction with an appropriate interval therebetween. Reference numeral 30 denotes a vertical rail, and a bracket 32 is fixed to one end of the vertical rail. has been done.
Reference numeral 36 denotes a magnetic body consisting of seven strip-shaped magnetic rubbers fixed to the lower surface of the protruding piece 38 formed on the bracket 32, and these are arranged so that different polarities are adjacent to each other, and the magnetic body 16 The homopolar planes are arranged to face each other. The magnetic body 3
The bracket 32 is biased in the direction of floating relative to the horizontal rail 4 by the repulsive magnetic force acting between the brackets 6 and 16. In this embodiment, the entire load applied to the bracket 32 is received by the repulsive magnetic force between the magnetic bodies 36 and 16, but part of this load is transferred to the vertical guide rollers on the side of the horizontal cursor 20 and the horizontal rail surface. It may be configured so that it is received between the two. 4
0 is a bracket fixed to the tail of the vertical rail 30, and a magnetic body is fixed to the lower surface of the bracket, and the magnetic body faces the magnetic body 42 disposed at the lower edge of the drawing board 2. Magnetic material on the bracket 40 side and magnetic material 4
The repulsive magnetic force acting between the vertical rail 3 and the vertical rail 3
The tail of 0 is floating above the two sides of the drawing board. 44
is a vertical cursor movably attached to the vertical rail 30, and connected to the head 4 via a hinge member.
6 are connected to each other, and straight rulers 48 and 50 are fixed to the ruler mounting plate of the head 46. In addition, vertical rail 3
0 has the same structure as the horizontal rail 4 in FIG. The cover plate 18 is removably attached to the opening of the vertical cursor 44, and a magnetic body is arranged to face the magnetic body, and the vertical cursor 44 is moved relative to the vertical rail 30 by the magnetic force of both magnetic bodies. It may be configured to be biased in the direction of floating.

In the above configuration, when the head 46 is manually pressed in any direction parallel to the two surfaces of the drawing board, the horizontal cursor 20 is guided by the vertical rail surface of the horizontal rail 4 and moves along the horizontal rail 4. Then, the vertical cursor 44 moves along the vertical rail 30, and the head 4
6 and straightedges 48, 50 can be moved to desired positions on the drawing board 2. When the horizontal cursor 20 is moved, almost no load is applied to the guide roller 26 due to the weight of the vertical rail 30, head 46, horizontal cursor 20, etc. due to the levitation force of the magnetic bodies 36 and 16, so the horizontal cursor 20, that is, the vertical rail 30, can be moved very easily. It can be moved with light force. Lid plate 18
When dust such as iron powder adheres to the surface of the magnetic body 16 due to the magnetic force of the magnetic body 16, the cover plate 18 is pulled out from the recessed part 8 along its longitudinal direction, the magnetic force is removed from the cover plate 18, and the cover plate 18 is removed. Clean the surface.

As described above, the present invention includes forming a recess for inserting a magnetic material along the longitudinal direction in a rail member that guides a cursor, inserting the magnetic material into the recess, and placing a cover plate in the opening of the recess. Since it is removably attached, the magnetic material is not exposed to the outside, thus protecting the magnetic material and creating a decorative effect on the rail member by the cover plate. Furthermore, by removing the cover plate from the recessed portion, magnetic force is removed from the surface of the cover plate, and there is an effect that dust such as iron powder adhering to the substrate can be easily cleaned.

[Brief explanation of drawings]

FIG. 1 is an overall plan view of the rail type universal parallel ruler, and FIG. 2 is a side view of the main parts. 2...Drawing board, 4...Horizontal rail, 8...Recessed part,
10... Iron plate, 16... Magnetic material, 18... Lid plate,
20...Horizontal cursor, 30...Vertical rail, 36...
...Magnetic material, 40...Bracket, 42...Magnetic material, 44...Vertical cursor, 46...Head, 4
8,50...Straight ruler.

Claims (1)

[Claims] 1 A drawing board 2, a horizontal rail 4 fixed to the upper edge thereof, a horizontal cursor 20 movable along the horizontal rail 4, a vertical rail 30 connected at one end to the horizontal cursor 20, In a rail-type flexible parallel ruler or the like consisting of a vertical cursor 44 movable along a vertical rail 30 and a head 46 connected to the vertical cursor 44, a recessed portion for inserting a magnetic material is formed in the rail along its longitudinal direction. A strip-shaped magnetic material is inserted into the recess, a cover plate is removably attached to the opening of the recess, and the magnetic material is placed on the side of the cursor that moves along the rail so as to face the magnetic material. A moving load reducing device for a cursor, characterized in that the cursor is biased in a direction in which the cursor is floated relative to a rail by the magnetic force of the two magnetic materials.