JPH0114462Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a guide device for a horizontal cursor in a rail-type flexible parallel ruler or a rail-type coordinate analyzer.

In a rail-type flexible parallel ruler or coordinate analyzer, one end of the vertical rail is connected to the left end of the horizontal cursor in order to reduce the range in which the head cannot move, that is, the dead space on the drawing board.
Therefore, when the drawing board is used perpendicular to the floor, the weight of the vertical rail and the head connected to it is concentrated on one roller located at the horizontal cursor, The problem was that the lifespan of the device was shortened.

The present invention aims to eliminate the above defects.

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

In FIG. 1, reference numeral 2 denotes a drawing board, which is supported by a drawing board support frame of a tiltable drafting table. Said drawing board 2
is rotatably supported about an axis 4 parallel to its front edge, and is supported so that it can be set at any rotation angle between a horizontal state and a vertical state. Reference numeral 6 denotes a horizontal rail of a rail-type universal parallel ruler, which is fixed to the rear edge of the drawing board 2 with a vise-type fixture. The horizontal rail 6 has a drawing board 2.
Horizontal rail surfaces 8, 10 parallel to the surface and vertical rail surfaces 12, 14 perpendicular to the two surfaces of the drawing board are formed.
Reference numeral 16 denotes a horizontal cursor made of an oblong plate member, and a rising portion 18 is formed at the left end of the horizontal cursor. Denoted at 20 and 22 are horizontal rollers rotatably supported near both ends of the horizontal cursor 16, and the surfaces of these rollers abut against the vertical rail surface 14 with a predetermined pressure. Lateral rollers 24 and 26 are provided near both ends of the horizontal cursor 16 to face the rollers 20 and 22, and their surfaces abut against the vertical rail surface 12 with a predetermined pressure.

The support shafts of the horizontal rollers 20 and 22 are attached to the horizontal cursor 16 so as to be movable and adjustable in a direction perpendicular to the rail surface 14 by a known roller pressure adjustment mechanism. The spindles of the rollers 20 and 22 are finely adjusted as appropriate, so that the opposing distance between the rollers 20 and 24 and the opposing distance between the rollers 22 and 26 are such that the rollers 20, 22 and 24, 26 are just aligned with the rails. In order to adhere to the surfaces 14 and 12 with appropriate pressure,
Adjusted accordingly. 28 and 30 are vertical rollers that are rotatably supported on the sides of the horizontal cursor 16 at an appropriate interval, and are placed on the horizontal rail surface 10. A vertical roller 32 is rotatably supported by the horizontal cursor 16, and the roller 32 is mounted on the horizontal rail surface 8.

Reference numeral 34 denotes a slot bored in a direction perpendicular to the longitudinal direction of the horizontal rail 6 at approximately the center of the horizontal cursor 16, and the narrow part of the slot is opened on the top surface of the horizontal cursor 16. are doing. A plate-shaped slider 36 is slidably fitted into the wide part of the jaw structure 34, and a roller support shaft 38 is erected on the slider 36, and a horizontal intermediate roller 40 is rotatably mounted on the support shaft 38. It is attached to. Screw shafts 42 and 44 are protruded from the bottom of one end of the slider 36 and one end of the hinge 34, and a tension coil spring 46 is suspended between the screw shafts 42 and 44. The intermediate roller 40
The surface of the vertical rail surface 14 is in elastic contact with the vertical rail surface 14 under a predetermined pressure due to the tensile elasticity of the coil spring 46. Reference numeral 48 denotes a vertical rail, and a pair of brackets 50 (one not shown) fixed to one end of the vertical rail are rotatably supported at both ends of the rising portion 18 about an axis parallel to the horizontal rail 6. has been done.

Thereby, the vertical rail 48 is configured to be able to rotate around both ends of the rising portion 18 within a plane perpendicular to the two surfaces of the drawing board. Reference numeral 52 denotes a tail roller rotatably supported by the other end of the vertical rail 48, and is placed movably on the surface of the drawing board 2. A vertical cursor 54 is movably attached to the vertical rail 48 via rollers, and a head 56 is attached to this via a hinge member, and straightedges 58 and 60 are attached to the ruler attachment plate of the head 56. Fixed and removable.

Next, the operation of this embodiment will be explained.

When the second side of the drawing board is set horizontally to the floor, the weight of the horizontal cursor 16 is the vertical rollers 28, 30 and 3.
Supported by 2. In this state, when the handle of the head 56 is pressed in any direction parallel to the two surfaces of the drawing board, the horizontal cursor 16 is guided by the vertical rail surfaces 12, 14 and the horizontal rail surfaces 8, 10, and moves along the horizontal rail. 6, and the vertical cursor 54 moves along the vertical rail 48, and the head 56
can be moved to any position on the drawing board 2. When the two sides of the drawing board are horizontal as described above, or when the angle of inclination is close to horizontal, the vertical rail 48
The total weight of the head 56, etc. is the same as the rollers 20, 22,
20, 22, 40 without joining 40
The load applied to is small. However, if the drawing board 2 is set at an angle of inclination perpendicular or close to perpendicular to the floor as shown in
A vertical rail 48 and a head 56 are attached to the rising portion 18 of the
etc. acts as a load. This load is
Vertical rail surface 14 and horizontal rollers 20, 22, 40
Supported by. Here, if it is assumed that the intermediate roller 40 does not exist as in the conventional case, the load applied to the rising portion 18 of the horizontal cursor 16 will be applied to the horizontal rollers 20 and 22 at a ratio of approximately 9:1. In other words, since the load applied to the horizontal cursor 16 is an uneven load, most of the load applied to the horizontal roller 20
It will take a while. However, in this proposal, a horizontally facing intermediate roller 4 is placed at a suitable location between the horizontally facing rollers 20 and 22.
0, and the intermediate rollers 40 are brought into elastic contact with the rail surface 14 by the tensile elasticity of the coil springs 46, so that the load applied to the rising portion 18 is applied on average to the horizontal rollers 20, 22, and 40. Become,
The load applied to the horizontal rollers 20 is drastically reduced. still,
A separate rail surface for the intermediate roller 40 may be formed into a horizontal rail. In this embodiment, the horizontal cursor 16 is positioned on the horizontal rail surfaces 8 and 10 provided on the horizontal rail 6, the vertical rail surfaces 12 and 14, the vertical rollers 28, 30, and 32 that abut these, the horizontal rollers 20, 22, 24, and 26, but in the conventional method, the horizontal cursor is guided by a pair of horizontal V-grooves formed along the longitudinal direction of the horizontal rail 6, and horizontal rollers that fit into the horizontal V-grooves. A known guide mechanism may also be used. In this case, the intermediate roller may be brought into elastic contact with the wall surface of the horizontal V-groove, or alternatively, the intermediate roller may be brought into elastic contact with a surface perpendicular to the drawing surface formed by being positioned near the horizontal V-groove on the horizontal rail. It's okay.

Since the present invention is constructed as described above, it is possible to prevent the load due to the weight of the vertical rail from being concentrated on a single roller on the horizontal cursor side, thereby prolonging the life of the roller and ensuring smooth operation. There is an effect that the horizontal cursor can be guided along the horizontal rail.

[Brief explanation of the drawing]

The drawings show a preferred embodiment of the present invention, in which Fig. 1 is an overall front view, Fig. 2 is a side view, Fig. 3 is a plan view of the horizontal cursor, Fig. 4 is a sectional view taken along the line A-A, and Fig. 5 is a cross-sectional view taken along line A-A. The figure is a sectional view. 2...Drawing board, 4...Axis line, 6...Horizontal rail,
8,10...Horizontal rail surface, 12,14...Vertical rail surface, 16...Horizontal cursor, 20,22,2
4, 26...Sideways roller, 34...T groove, 36...
...Slider, 40...Middle roller, 46...Spring.

Claims (1)

[Scope of utility model registration request] A horizontal rail 6 that can be fixed to the rear edge of the drawing board 2; and a horizontal cursor 16 that is movably connected to the horizontal rail 6 and that is elongated in the direction along the horizontal rail 6.
, a vertical rail 48 connected near one end of the horizontal cursor 16 so as to be perpendicular to the horizontal rail 6; a vertical cursor 54 movably connected to the vertical rail 48; At least two horizontal rollers 20 provided near both ends of the horizontal cursor 16 apply a load to the horizontal cursor 16 in a direction parallel to the two surfaces of the drawing board. 22 and the roller 20,2
In the device, the horizontal cursor 16 is supported by a rail surface 14 provided on the side of the horizontal rail 6 that supports the surface of the at least two
The intermediate roller 40 is positioned at a suitable position between the horizontal rollers 20 and 22 so as to be movable in the direction toward and away from the rail surface 14, and the elasticity of the spring 46 causes the intermediate roller 40 to face the rail surface 14. A horizontal rail type flexible parallel ruler, etc., characterized in that the horizontal cursor 16 is pressed against the rail surface of the horizontal rail 6, and a reaction force of the pressure contact force causes the horizontal cursor 16 to generate a floating force with respect to the horizontal rail 6. Cursor guide device.