JPH0116638Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a parallel ruler device, and its object is to eliminate the dead space in the front and rear of a drawing board where the horizontal ruler cannot move.

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

2 is a drawing board, and 4 is a vertical rail fixed to the side of the drawing board 2, from which rail parts 6, 8 and rail parts 10, 12 are protruded over the entire length in the longitudinal direction. 14 is a vertical cursor, which has one or more upper rows 16 and a plurality of lower rows 18.
is rotatably supported, the circumferential groove of the upper roller 16 is rotatably fitted into the rail portion 6, and the lower roller 1
The circumferential groove 8 is rotatably fitted into the rail portion 8. The vertical cursor 14 has a predetermined length in a direction parallel to the vertical rail 4 so that it can be stably attached to the vertical rail 4. 20 is a balance weight, and a plurality of horizontal rollers 22 are rotatably supported in a recessed portion of the balance weight. A circumferential groove is formed on the surface of the roller 22, and the circumferential groove is rotatably fitted into the rail parts 10, 12. 24 is the rising portion 14 of the vertical cursor 14
The center axis of the screw shaft 24 is set to be horizontal to the surface of the drawing board 2 and perpendicular to the longitudinal direction of the vertical rail 4. Reference numeral 26 denotes a holding member, and a hole 28 is transparently provided in the vertical portion 26a of the holding member, and the outer circumferential surface of the screw shaft 24 is rotatably fitted into the hole 28. The screw shaft 24 includes:
A tubular washer 30 is inserted between the vertical portion 26a and the rising portion 14a.
32 is a knob, and a screw hole formed in this knob is screwed into the threaded portion of the screw shaft 24. 3
4 is a cover fixed to the vertical cursor 14, 36
is a stopper projecting from the vertical portion 26a, and a stopper shaft 38 projecting from the cover 34 is located on the rotation locus of this stopper. 40
is a lid fixed to one end of the vertical rail 4, and a frame 4 is placed between the side surface of the lid and the inner surface of the vertical rail 4.
2 is slidably disposed, and a timing belt pulley 44 is rotatably supported on the frame 42. Reference numeral 46 designates a cap screw that is slidably inserted into a hole formed in the lid 40, and the threaded portion of this cap screw is screwed into a screw hole provided in the bottom of the frame 42. Reference numeral 48 denotes a lid fixed to the other end of the vertical rail 4, on which a shaft 50 is rotatably supported, and a timing belt pulley 52 is fixed to the shaft 50. An endless timing belt 54 is stretched between the pulleys 44 and 52 with an appropriate tension, and a lower horizontal portion 54a of the belt 54
is fixed to the horizontal part of the cursor 14 by a fixing plate 56 and screws 58, and the upper horizontal part 54b of the belt 54 is fixed to the arm 60 fixed to the balance weight 20 by fixing plate 62 and screws. It is fixed by 64 is a ruler holder, one of which is as shown in Figs. 3 and 6;
It is fixed to a hollow elongated metal fitting 66 with screws. The upper surface of a horizontal ruler 68 is fixed to the lower surface of the metal fitting 66 with adhesive. 70 is a long hole formed in the horizontal portion 26b of the holding member 26 to a predetermined length parallel to the longitudinal direction of the vertical rail 4, and the outer peripheral surface of the elliptical portion 72a of the shaft rod 72 slides into the long hole 70. They fit together freely. A plate is fixed to the lower end of the shaft rod 72. The shaft rod 72 is connected to the holder 64
The horizontal ruler 68 is slidably inserted into a long hole 74 formed along the longitudinal direction of the horizontal ruler 68, and the threaded portion of the shaft rod 72 projects upwardly from the upper surface of the holder 64. Reference numeral 76 denotes a knob, the screw hole of which is screwed into the threaded portion of the shaft rod 72. The right side of the drawing board 2 also has the same structure as described above. In this embodiment, the rotation center axes of the left and right holding members 26, 26' are adjusted to coincide at the assembly stage. The above shaft 50 on the vertical rail 4 side
is connected to the corresponding shaft on the vertical rail 4' side by a connecting shaft 78 so as to interlock with each other.

Next, the operation of this embodiment will be explained.

First, when mainly drawing on the lower part 2a of the drawing board 2, move the knobs 76, 76' to the shaft 72.
loosen the holders 64, 64' along the long holes 70, 70' as shown in FIG.
position it at the lowest end, and at that position turn the knobs 76, 76'.
When rotated in the tightening direction and screwed into the threaded part of the shaft rod 72, the holders 64, 64' are attached to the holding members 26, 2.
It is fixed at 6'. With this, the vertical rail 4,
4' does not protrude long from the bottom of the drawing board 2,
The dead space in the lower part 2a of the drawing board 2 can be eliminated or reduced. To remove or reduce the dead space in the upper part 2b of the drawing board 2 without extending the length of the vertical rails 4, 4', loosen the knobs 76, 76' against the threads of the shaft rod 72 in the manner described above. , position the holders 64, 64' at the uppermost ends of the elongated holes 70, 70' in FIG.
6, 76' in the tightening direction to tighten the holders 64, 76'.
64' is fixed to the holding members 26, 26'. By loosening the knobs 32, 32', the holding members 26, 26'
rotates approximately 100 degrees in the direction of rotation of the hour hand about the shaft 24 in FIG. 5 from a horizontal state until the stopper 36 collides with the stopper shaft 38, and the ruler 68 is separated from the surface of the drawing board by a predetermined height. can be done.
The oscillating movement of the holding members 26, 26' is performed extremely smoothly since their respective rotational axes coincide with each other. When repapering the drawing or cleaning the drawing board 2 is completed, lower the ruler 68, set the lower surface of the ruler 68 horizontally to the drawing board 2, and turn the knobs 32 and 3.
2' in the tightening direction to remove the left and right holding members 26,
26' is fixed to the left and right cursors 14. Metal fittings 6
6 is pressed in the vertical direction in FIG. ′, and in conjunction with this movement,
In the opposite direction, the balance weight 20 also moves along the rail portions 10, 12. On the other hand, cursor 4
The movement of is transmitted to the other cursor via the timing belt 54 and the connecting shaft 78, and the left cursor 4 and the right cursor move in the same direction and by the same amount, and the right balance weight also moves in conjunction with the right cursor. Then, the horizontal ruler 68 moves in the opposite direction, thereby causing the horizontal ruler 68 to move in parallel on the drawing board 2.
The weight of the left and right vertical cursors 14, the total weight of the members connected thereto, and the left and right balance weights 20.
The weights of horizontal ruler 6 are set to be the same.
8 can be stationary at any position on the inclined drawing board 2, and prevents the horizontal ruler 68 from falling suddenly along the drawing board 2 surface when the metal fitting 66 is released. Incidentally, the balance weight may be arranged only on either one of the left and right vertical rails 4, 4'. Note that when the horizontal ruler 68 is released from the holding members 26, 26', the total weight on the vertical cursor side becomes lighter by the weight of the horizontal ruler 68 compared to the total weight of the balance weight; Since the weight is light, there is no risk of the balance between the vertical cursor side and the balance weight being greatly disturbed. As is clear from the above description, the holding members 26, 2
6' long hole 70, 70', shaft rod 72, knob 76,
Reference numeral 76' constitutes an attachment mechanism for removably attaching both ends of the horizontal ruler 68 to two positions of the vertical cursor 14 in a direction parallel to the vertical rails 4, 4'. The mounting mechanism is shown as an example of implementation, and various design variations are possible, and the implementation of the present invention is not particularly limited to the structure of the illustrated embodiment.

The present invention is a parallel ruler device that stably guides a horizontal ruler using a vertical cursor that is movable along a vertical rail, and has the effect of reducing the dead space of a drawing board without extending the vertical rail. Exists.

[Brief explanation of drawings]

The figures show preferred embodiments of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a plan view of the main part, Fig. 3 is a sectional view of the main part, and Fig. 4 is a plan view of the main part. FIG. 5 is a side view, and FIG. 6 is a sectional view of the horizontal ruler. 2... Drawing board, 4... Vertical rail, 14... Vertical cursor, 20... Balance weight, 26... Holding member, 32... Knob, 64... Ruler holder,
68...Horizontal ruler.

Claims (1)

[Scope of utility model registration request] Vertical rails 4, 4' are arranged on both sides of the drawing board 2,
A vertical cursor 14 is placed on each of the vertical rails 4 and 4'.
In a device in which the vertical cursors 14 are connected so as to be movable in the same direction and by the same amount, the vertical rails 4, on the side of the cursor 14,
A horizontal ruler 68 is placed at two positions parallel to 4'.
A parallel ruler device characterized in that it is provided with an attachment mechanism for detachably attaching both ends of the ruler.