JP2544088Y2 - Cursor brake device for rail - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for a rail cursor used in a rail type free parallel ruler, a coordinate analyzer and the like.

[0002]

2. Description of the Related Art In FIG. 6, reference numeral 1 denotes a drawing plate supported on a drafting table, and a horizontal rail 2 is fixed to an upper edge of the drawing plate.
A guide rail 3 is fixed to the lower edge of the drawing plate 1.

A horizontal cursor 12 is movably connected to the horizontal rail 2 via horizontal rollers 4, 5, 6, 7 and vertical rollers 8, 9, 10 shown in FIG.

A hinge shaft 13 of the horizontal cursor 12 has
The vertical rails 1 are at right angles to the horizontal rails 2.
One end of 4 is connected.

The lower end of the vertical rail 14 is mounted on the guide rail 3 via a tail roller (not shown) so as to run freely.

On the vertical rail 14, horizontal rollers 15, 16, 17, 18 and vertical rollers 19, 20, 2 shown in FIG.
1, a vertical cursor 22 is movably connected.

The horizontal rollers 5, 6 of the horizontal cursor 12
Ribs 23 formed over the entire length in the longitudinal direction of the horizontal rail 2
9 (see FIG. 9), the horizontal rollers 4, 7 of the horizontal cursor 12 are in contact with a roller surface 24 perpendicular to the drawing board 1 surface, and a rib 25 formed over the entire length of the horizontal rail 2 in the longitudinal direction. Is in contact with a roller surface 26 perpendicular to one surface of the drawing plate. The side surfaces of the ribs 23 and 25 opposite to the roller surfaces 24 and 26 constitute braking surfaces 27 and 28.

The vertical rollers 9, 11 of the horizontal cursor 12
Is mounted on a horizontal roller surface (not shown) formed on one side of the horizontal rail 2 so as to run freely.
The two vertical rollers 8 and 10 are movably mounted on a horizontal roller surface (not shown) formed on the other side of the horizontal rail 2.

The horizontal rollers 4, 5, 6, 7 and the roller surface 2
4 and 26 regulate the movement of the horizontal cursor 12 in the direction perpendicular to the horizontal rail 2 to guide the horizontal cursor 12 in the longitudinal direction of the horizontal rail 2, and the vertical rollers 8, 9, 10 and 11 and the horizontal rail 2 The horizontal roller surface guides the horizontal cursor 12 along the longitudinal direction of the horizontal rail 2 and in a direction horizontal to the drawing board 1 surface.

A vertical cursor 22 along the vertical rail 14
Is the same as the guide structure of the horizontal cursor 12 along the horizontal rail 2 shown in FIG.

The horizontal rollers 15, 16, 17, 18 are:
The vertical rollers 19, 20, 21 are placed on the horizontal roller surface of the vertical rail 14, while contacting the roller surfaces 29, 30 of the vertical rail 14.

An operation head 32 is attached to one side of the vertical cursor 22 via a hinge connecting mechanism 31.
Scales 33, 3 are attached to the scale mounting plate of the head 32.
4 is attached.

The horizontal rail 2, the vertical rail 14, and the operation head 32 constitute a rail-type free parallel ruler. A brake arm 35 is rotatably supported on a shaft 36 on the upper surface of the horizontal cursor 12.
One end of a brake arm 37 bent into an L shape is rotatably supported at one end of the shaft 5 by a shaft 38.

At the rising portions formed at the other ends of the brake arms 35 and 37, brakes 39 and 40 made of thick rubber are fixed, and the flat surfaces of the brakes 39 and 40 are fixed. Are opposed to the brake surfaces 27 and 28 of the lateral rail 2, respectively. A brake transmission member 41 is fixed to a portion of the brake arm 37 substantially parallel to the longitudinal direction of the horizontal rail 2.

As shown in FIG. 10, one end of a transmission link 43 rotatably supported by a horizontal cursor 12 is in contact with a rising portion of the brake transmission member 41. The other end of the transmission link 43 is rotatably connected to one end of a transmission pipe 44 slidably supported in the longitudinal direction on the side of the vertical rail 14.

A cam 45 is rotatably supported by a shaft 46 on the side of the vertical rail 14, and a roller 47 attached to the other end of the transmission pipe 44 is in contact with the cam 45.

A horizontal cursor brake lever 48 is fixed to the cam 45, and the lever 48 projects from the side surface of the vertical rail 14 so that the lever 48 can be operated externally. The brake arms 35, 37 and the brakes 39, 40
It constitutes a lateral brake mechanism.

Next, the vertical brake mechanism provided on the vertical cursor 22 will be described. On the upper surface of the vertical cursor 22, a substantially intermediate portion of the brake arm 49 is rotatably mounted on a shaft 50.
One end of an L-shaped brake arm 51 is rotatably supported on a shaft 52 at one end of the brake arm 49.

Reference numeral 53 denotes a shaft 54 which is rotatable on the vertical cursor 22.
The cam 53 is opposed to a side surface of a portion of the brake arm 51 that is substantially parallel to the longitudinal direction of the vertical rail 14. A brake lever 55 is integrally fixed to the cam 53.

At the rising portions formed at the other ends of the brake arms 49, 51, brakes 56, 57 made of thick rubber are fixed.
The flat surface 57 faces the brake surfaces 58 and 59 formed on the ribs of the vertical rail 14.

The brake arms 49 and 51 include a spring 6
0 causes the brake shoes 56, 57 to
It is urged in a direction away from 59.

In FIG. 7, the brake arms 35, 3
Similarly, the brakes 39, 4 are also
0 is urged in a direction away from the brake surfaces 28 and 27.

In the above configuration, when the horizontal cursor 12 is fixed to the horizontal rail 2, the brake lever 48 is manually pushed down in the direction of the arrow in FIG. As a result, the cam 45 rotates, and the roller 47 is pressed by the eccentric enlarged portion of the cam 45, and the roller 47 is pushed in the arrow direction in FIG. The movement of the roller 47 in the direction of the arrow in FIG. 10 is transmitted to the brake transmission member 41 via the transmission pipe 44 and the transmission link 43, and the transmission member 41
It is pushed in the arrow direction Y during the middle.

When the transmission member 41 is pushed in the arrow direction Y,
The brake shoe 40 is pressed against the brake surface 27. The brake arm 37 presses the brake arm 35 through the shaft 38 in the counterclockwise direction in FIG. 7 around the shaft 36 by the reaction force of the pressing force against the brake surface 27 of the brake shoe 40. Thereby, the brake shoe 39 is pressed against the brake surface 28.

The brake surface 2 of the brake shoes 39, 40
The horizontal cursor 12 is fixed to the horizontal rail 2 by the pressing force on the horizontal rails 8 and 27. The horizontal rail 2 of this horizontal cursor 12
Can be released by returning the brake lever 48 to the original position and releasing the pressing force of the cam 45 against the roller 47.

When the vertical cursor 22 is fixed to the vertical rail 14, the brake lever 55 is swung clockwise in FIG.
Press the side of.

When the brake arm 51 is pressed by the cam 53, the brake shoe 57 is pressed against the brake surface 59, and the brake shoe 56 is pressed against the brake surface 58 to fix the vertical cursor 22 to the vertical rail 14. .

The fixed state of the vertical cursor 22 with respect to the vertical rail 14 is released by swinging the brake lever 55 counterclockwise in FIG. 8 and releasing the pressing force of the cam 53 against the side surface of the brake arm 51. Can be.

[0029]

[Problems to be Solved by the Invention] If the cursor fixed state in which the brake of the cursor brake mechanism is pressed to the brake surface of the rail, that is, the brake is locked, is continued for a long time, the brake is constituted by a rubber flat surface. Therefore, the brake shoe may stick to the brake surface. In this state, when the brake is unlocked, there is a defect that an unpleasant noise is generated when the brake is released from the brake surface. The purpose of the present invention is to solve this problem.

[0030]

According to the present invention, a brake surface is formed over substantially the entire length of a rail, and a brake arm is attached to a cursor movably connected along the rail. A brake system for a rail cursor, wherein a rubber brake shoe fixed to the brake surface is disposed opposite to the brake surface, and the brake arm is displaced to press and release the brake shoe to and from the brake surface. The surface of the shoe that contacts the brake surface of the rail is a convex curved surface.

[0031]

[Function] When the brake is pressed against the brake surface of the rail, the cursor is fixed to the rail. When the brake is released from the brake surface of the rail, the cursor is released from being fixed to the rail, and the cursor can move freely along the rail. It becomes a state.

The noise generated when the brake shoe is separated from the brake surface after the brake shoe has been pressed against the brake surface for a long time is because the contact area between the brake shoe and the brake surface is small due to the convex curved shape of the bouche. , Become smaller.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In FIG. 3, reference numeral 62 denotes a horizontal cursor, and horizontal rollers 63, 64, 65, 66 and vertical rollers 6 are provided on the horizontal rail 2 of the rail-type free parallel ruler.
It is movably connected via 7, 68, 69, 70.

Reference numerals 71 and 72 denote brake arms 73 and 74, respectively.
The rubber brake shoes are fixed to the rising portions of the horizontal rails 2 and face the brake surfaces 28 and 27 of the horizontal rail 2. A convex curved surface 75 is formed on the surface of the brake shoes 71, 72 facing the brake surfaces 28, 27 as shown in FIG.

In FIG. 3, reference numeral 76 denotes brake arms 73 and 74.
And 77 is a brake transmission member. The brake arms 73 and 74 are shown in FIG.
Has the same structure as the brake arms 35 and 37 of FIG.

In FIG. 4, reference numeral 78 denotes a vertical cursor.
Horizontal rollers 79, 80, 81, 82 and vertical rollers 83, 84, 8 are attached to the vertical rails 14 of the rail-type free parallel ruler.
5 so as to be movable. Reference numerals 86 and 87 denote rubber brake shoes fixed to the rising portions of the brake arms 88 and 89.
4 faces the brake surface.

Vertical rail 1 of the brakes 86, 87
A convex curved surface 90 is formed on the surface facing the brake surface of No. 4.

In FIG. 4, reference numeral 91 denotes a cam, 92 denotes a brake lever, and 93 denotes a brake release spring. Brake arms 88 and 89, cam 91 and brake lever 9 in FIG.
2 is a brake arm 49, 51, cam 53 in FIG.
And the same structure as the brake lever 55.

In the above configuration, when the horizontal cursor brake lever 48 (see FIG. 10) is operated in the brake application direction, the convex curved surfaces 75 of the brake shoes 72, 71 are pressed against the brake surfaces 27, 28 of the horizontal rail 2.

When the horizontal cursor brake lever 48 (see FIG. 10) is operated in the horizontal brake release direction, the brake shoes 72, 71 are actuated by the biasing force of the spring 76 so that the brake surface 2 is released.
7 and 28, the lateral brake is released.

Similarly, when the vertical cursor brake lever 92 is operated in the brake application direction for the vertical brake, the brake shoes 86, 87 are moved to the brake surfaces 58, 5 of the vertical rail 14.
9 (see FIG. 8).

When the vertical cursor brake lever 92 is operated in the brake releasing direction, the convex curved surfaces 90 of the brake shoes 86, 87 are separated from the brake surfaces 58, 59 of the vertical rail 14 by the urging force of the spring 93, and the vertical brake is released. It is released.

For a long time, brake shoes 72, 71, 86,
When the brake is released after the state in which the brake 87 is pressed against the brake surface of the rail, and the brakes 72, 71, 86, 87 are separated from the brake surface of the rail, the brakes 72,
By the action of the convex curved surfaces 75, 90 of 71, 86, 87,
No abnormal noise is generated between the brake shoes 72, 71, 86, 87 and the brake surface of the rail. Alternatively, this abnormal noise becomes extremely small.

As shown in FIG. 5, grooves 94 and mesh grooves 95 may be provided on the convex curved surface of the brake shoe.

[0045]

According to the present invention, the contact area between the rubber brake shoe and the brake surface on the rail side during braking is reduced. Therefore, the brake shoe does not stick to the brake surface on the rail side, and there is an effect that the abnormal noise generated when the brake is released can be reduced.

[Brief description of the drawings]

FIG. 1 is an external explanatory view showing an embodiment of the present invention.

FIG. 2 is another explanatory plan view of the present invention.

FIG. 3 is an external explanatory view of a horizontal cursor showing the first embodiment of the present invention.

FIG. 4 is an external view of a vertical cursor showing the first embodiment of the present invention.

FIG. 5 is an external view of a brake shoe showing another embodiment of the present invention.

FIG. 6 is an explanatory overall plan view of the prior art.

FIG. 7 is an explanatory plan view of the prior art.

FIG. 8 is an explanatory plan view of the prior art.

FIG. 9 is an explanatory external view of a conventional technique.

FIG. 10 is an explanatory view of a brake transmission mechanism of a horizontal cursor showing a conventional technique.

[Explanation of symbols]

 1 Drawing Board 2 Horizontal Rail 3 Guide Rail 4 Horizontal Roller 5 Horizontal Roller 6 Horizontal Roller 7 Horizontal Roller 8 Vertical Roller 9 Vertical Roller 10 Vertical Roller 11 Vertical Roller 12 Horizontal Cursor 13 Hinge Axis 14 Vertical Rail 15 Horizontal Roller 16 Horizontal Roller 17 Horizontal Roller 18 Horizontal roller 19 Vertical roller 20 Vertical roller 21 Vertical roller 22 Vertical cursor 23 Rib 24 Roller surface 25 Rib 26 Roller surface 27 Brake surface 28 Brake surface 29 Roller surface 30 Roller surface 31 Hinge connection mechanism 32 Operation head 33 Scale 34 Scale 35 Brake arm 36 axis 37 brake arm 38 axis 39 brake shoe 40 brake shoe 41 brake transmission member 42 axis 43 transmission link 44 transmission pipe 45 cam 46 axis 47 roller 48 horizontal cursor brake lever 49 brake arm 50 axis 5 Reference Signs List 1 brake arm 52 axis 53 cam 54 axis 55 brake lever 56 brake shoe 57 brake shoe 58 brake surface 59 brake surface 60 spring 61 spring 62 horizontal cursor 63 horizontal roller 64 horizontal roller 65 horizontal roller 66 horizontal roller 67 vertical roller 68 vertical roller 69 Vertical roller 70 Vertical roller 71 Brake shoe 72 Brake shoe 73 Brake arm 74 Brake arm 75 Convex curved surface 76 Spring 77 Brake transmission member 78 Vertical cursor 79 Horizontal roller 80 Horizontal roller 81 Horizontal roller 82 Horizontal roller 83 Vertical roller 84 Vertical roller 85 Vertical roller 86 brake shoe 87 brake shoe 88 brake arm 89 brake arm 90 convex curved surface 91 cam 92 brake lever 93 spring 94 groove 95 mesh groove

Claims (1)

(57) [Scope of request for utility model registration] 1. A brake surface is formed over substantially the entire length of a rail, a brake arm is attached to a cursor movably connected along the rail, and a rubber brake shoe fixed to the brake arm faces the brake surface. In the brake device for a cursor for a rail, wherein the brake arm is displaced to press and release the brake shoe to and from the brake surface by displacing the brake arm, a surface of the brake shoe in contact with the brake surface of the rail is a convex curved surface. A brake device for a cursor for rails.