JPH0237590Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a parallel ruler, and more particularly to a ruler elevating and lowering support device for supporting a parallel ruler such that it can be raised and lowered relative to a drawing surface.

[Conventional technology]

If the ruler is moved with the lower surface of the ruler in contact with the surface of the drawing paper on the drawing board, there will be an inconvenience that the surface of the drawing paper will become dirty. Therefore, as shown in Japanese Utility Model Application Publication No. 56-176894, a ruler is supported so as to be movable in the vertical direction relative to the drawing surface, and the lower surface of the ruler is not rubbed against the drawing paper on the drawing board. It is configured so that it can be moved in parallel. As shown in FIG. 4, this type of device has one link 4 rotatably supported 6 at one end of the cursor 2, and a support member 8 connected to the other lifting end of the link 4. An end of a ruler 10 is connected to the support member 8.

[Problem that the invention attempts to solve]

The above conventional device has a ruler connecting portion 8 of the support member 8.
a protrudes in the extension direction of the other ascending and descending end of the link 4. Therefore, the ruler 10 is located at the end of the cursor 2 in the longitudinal direction opposite to the link pivot 6, that is, toward the other side 2a of the cursor 2. In the case of such arrangement of the ruler 10, even if the cursor 2 is moved to the limit position where it is stopped by the stopper at one end of the vertical rail 12, the drawing edge 10a of the ruler 10 will not move as shown in FIG. The line moves away from one end of the drawing board 14, and a large area where drawing is not possible, that is, a dead space S is formed at one end of the drawing board 14.

The present invention aims to eliminate the above defects.

[Means to solve problems]

In order to achieve the above object, the present invention provides drawing board 14.
A pair of cursors 20, 22 supported movably along rails 16, 18 arranged on both sides of the
A link 36 is pivotably supported in a plane substantially perpendicular to the surface of the drawing plate 14, and the above-mentioned figure opposite to the extending direction of the swinging end is provided at the vertically swinging end side of the link 36. A support member 40 is connected so as to protrude in a direction substantially parallel to the surface of the plate 14, and a ruler 28 is attached to a suitable position of the support member 40 near the end of the pivot 38 of the link 36.
A connecting portion 40a is provided to support the.

[Effect]

Since the connecting portion 40a of the support member 40 is set near the end of the pivot 38 of the link 36, the connecting portion 40a of the support member 40
The position of the cursor 20, 22 is set at a suitable position approximately halfway between both ends of the cursor 20, 22 in the longitudinal direction. Therefore,
When the cursors 20, 22 are moved to the limit position of one end of the rails 16, 18, the drawing edge 28 of the ruler 28
a is brought closer to one end of the drawing board 14, and the dead space on the drawing board 14 is considerably reduced.

〔Example〕

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

In FIG. 2, reference numeral 14 is a drawing board, and on both left and right sides there are rails 1 made of hollow elongated members.
6, 18 are fixedly installed on the rails 16, 18,
Cursors 20 and 22 are movably connected via rollers. The cursors 20, 22
Covers 24 and 26 are fixed to the. 28 is a ruler fixed to a ruler reinforcing metal fitting 30, and both ends of the metal fitting 30 are connected to holders 32, 3 by bolts.
It is fixed at 4. The holders 32 and 34 are connected to ruler lifting and lowering support devices disposed on the cursors 20 and 22, respectively. Said cursor 2
0 and 22 are connected to each other via a known transmission mechanism and are configured to move synchronously with each other along the rails 16 and 18.

Next, the structure of the ruler lifting/lowering support device will be explained with reference to FIG.

Reference numeral 36 denotes an elevating link whose one end is rotatably pivoted 38 near the cursor 22 so that it can swing in a plane perpendicular to the surface of the drawing board 14; One of the supporting members 40 is rotatably supported at the other end. The other end of the support member 40 protrudes in a direction opposite to the extension direction of the other end of the link 36, and the holder 34 is fixed to the connecting portion 40a of the support member 40. The connecting portion 40a is located approximately midway between both ends of the link 36. Reference numeral 42 denotes a parallel holding link whose intermediate portion is pivoted 44 to the intermediate portion of the elevating link 36, and a roller 46 rotatably supported at one end of this link rotatably contacts the horizontal surface of the cursor 22. ing. A roller 48 is rotatably supported at the other end of the link 42, and the lower surface of the support member 40 is placed on the roller 48. The links 36 and 42 constitute a parallel cross link mechanism,
The support member 40 is set parallel to the drawing board 14 surface. Reference numeral 50 denotes a tension coil spring, both ends of which are suspended between the other end of the link 42 and one end of the support member 40. Ruler 28 is
Each of the cursors 20 and 22 is supported by a support member 40 of a ruler elevating support device, and as shown in FIG.

Next, the operation of this embodiment will be explained.

Hold the grip formed on the reinforcing metal fitting 30 by hand and slide the rail 1 in a plane parallel to the surface of the drawing board 14.
When pressure is applied in the longitudinal direction of 6, 18, the left and right cursors 20, 22 are guided by the rails 16, 18 and move by the same amount in the same direction. In the figure, it moves in parallel in the vertical direction. The rollers of cursors 20 and 22 are rails 16 and 1
2, the drawing edge 28a of the ruler 28 is at an extremely small distance S from one end of the drawing board 14 until it is stopped by a stopper (not shown) at one end of the ruler 28, as shown in FIG. opposite. When the ruler 28 is pressed in a direction that touches the surface of the drawing board 14, the elevating link 36 swings clockwise in FIG. The support member 40 moves in parallel in the downward direction along the dotted line, the cross shape of the links 36 and 42 collapses, and the ruler 28 comes into contact with the surface of the drawing board 14. In this state, the tensile action axis of the coil spring 50 is approximately parallel to the links 36, 38, and the tensile force of the coil spring 50 hardly acts in the direction of raising the links 36, 38.
remains in the descending state. When the ruler 28 is lifted in the direction away from the drawing board 14, the links 36, 42
is formed in a cross-shaped direction, and the support member 48 rises until it collides with the upper stopper surface of the covers 24, 26. Even when the ruler 28 is released, the links 36 and 42 maintain the cross shape due to the tensile force of the spring 50, and the ruler 28 is maintained in an elevated state without falling toward the surface of the drawing board 14.

Incidentally, when implementing the present invention, the support member 40 may be supported only by the link 36 without providing the link 42.

〔effect〕

As described above, in the present invention, a support member is connected to one end of the elevating side of the elevating link so as to extend in the opposite direction to the extension direction of the one end, and a ruler is connected to the support member, so that the ruler can be moved along the longitudinal direction of the cursor. It can be positioned approximately midway between both ends in the direction, and has the effect of reducing the dead space on the drawing board.

[Brief explanation of the drawing]

FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a sectional view, FIG. 4 is a side view of the conventional design, and FIG. 5 is a plan view of the same. 14...Drawing board, 16, 18...Rail, 20,
22...Cursor, 24, 26...Cover, 28
...Ruler, 30...Metal fittings, 32, 34...Holder, 36...Link, 40...Supporting member, 42...
...Link, 46, 48...Koro.

Claims (1)

[Scope of utility model registration request] Rails 16, 1 arranged on both sides of the drawing board 14
A link 36 is pivotably supported on a pair of cursors 20 and 22 that are movably supported along the drawing board 14 in a plane substantially perpendicular to the surface of the drawing board 14. A support member 40 is connected to the side so as to protrude in a direction substantially parallel to the plane of the drawing plate 14 opposite to the extending direction of the swing end, and the support member 40 is connected to the pivot point of the link 36 of the support member 40. A ruler elevating and lowering support device for a parallel ruler, characterized in that a connecting portion 40a for supporting the ruler 28 is provided at a suitable location near the end of the support 38.