JP2511243Y2 - Hatching device for drafting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a hatching device for feeding a scale of a drafting machine in small increments to draw a hatch on a sheet.

[Conventional technology]

Various types of hatching devices of this kind have been devised. For example, in Japanese Utility Model Laid-Open No. 63-100299, a cursor is provided with a click plate that abuts on a guide rail and rotates with the movement of the cursor. There is disclosed a device provided with a click mechanism for stopping the rotating member at a predetermined angle between the cursor and the immovable portion of the cursor.

[Problems to be solved by the invention]

Since the hatching mechanism is incorporated in the drafting machine in any of the above conventional apparatuses, there is a defect that the weight of the hatching mechanism is always applied to the drafting machine even when the hatching work is not performed, which imposes a burden on the drafting machine.

The present invention aims to eliminate the above defects.

[Means for solving problems]

In order to achieve the above object, the present invention comprises a substrate that can be attached to an operation head of a parallel ruler or a scale of a parallel ruler, a link bar whose one end is rotatably supported by the substrate, and the link bar. A spring member for urging in a predetermined direction, a top member having a friction member on the lower surface and movably arranged on the drawing board surrounded by the substrate, and one end pivoting to the other end of the link bar. A link that is freely supported and the other end of which is rotatably supported by the top member, pitch width adjustment means for adjusting the movement width of the top member with respect to the substrate to a desired value, and the top member are illustrated. It is composed of a plate surface and spring means for urging the plate surface in a predetermined horizontal direction.

[Action]

First, the other end of the link bar is manually pushed down until the top member stops moving. The link bar rotates downward about one end, and this rotation is transmitted to the top member via the link. The top member is a force larger than the force for pressing the top member in the direction opposite to the force for pressing the top member due to the link and the force for urging the top member. ]) "Horizontal force"). At this time, a large frictional force acts between the lower surface of the top member and the surface of the drawing plate due to the force in the direction of pressing the top member against the drawing plate. Since the top member does not move on the drawing board due to the frictional force, the hatching device itself moves on the drawing board in the direction opposite to the horizontal force due to the reaction force of the horizontal force. After all, it is the hatching device itself that presses and moves the link bar by hand.

Next, when the link bar that is being pressed is released, the link bar is pushed back to its original position by the spring means that biases the link bar, and at the same time, the spring means that biases the top member is used to The member is also pushed back to its original position. In this case, since the force pressing the top member onto the drawing board does not work, the friction force does not act on the lower surface of the top member and the drawing board surface, and the hatching device itself does not move and the top member returns to its original position. Return to position. In this state, a line is drawn on the drawing board surface (paper placed on the drawing board surface) by the scale of the drafting machine connected to the hatching device.

By repeating the above operation, the scale of the drafting machine is pitch-fed by a constant width, and the hatching can be performed accurately.

Further, the pitch feed width can be adjusted to a desired value by controlling the movement width of the top member with respect to the substrate by the pitch width adjusting means.

〔Example〕

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

Reference numeral 2 denotes a ruler mounting plate of an operation head of a universal parallel ruler (a scale mounted on the mounting plate is not shown), and a predetermined space is provided on a drawing plate 4 on which a sheet is placed in a predetermined range. It is configured to be movable. The mounting portion 6 of the substrate 5 of the case of the hatching device abuts on one side of the ruler mounting plate 2, and the mounting portion 6 and the ruler mounting plate 2 are coupled by screws (not shown). Reference numeral 8 denotes a link bar whose one end is rotatably supported on the case substrate 5 by a shaft 10, and a pressing portion 12 is provided on the upper surface of the other end. Reference numeral 14 is a top member, and a friction member 15 made of rubber or the like is fixed to the lower surface of the top member. The top member 14 is movably arranged on the drawing board 4 surrounded by the case substrate 5. 16 is a link, one end of which is the link bar 8
Is rotatably supported by a shaft 18, and the other end is rotatably supported by a shaft 20 on the top member 14. Reference numeral 22 denotes an adjusting screw, which is screwed into a screw hole 23 formed in the case substrate 5, and an adjusting knob 24 is provided at one end portion protruding outside the case substrate 5. The adjusting knob 24 and the adjusting screw 22 are
Pitch width adjusting means for adjusting the moving width of the top member 14 with respect to the substrate 5 to a desired value is configured. A leaf spring 26 is fixed to the inside of the case substrate 5, and the link bar 8
Is urged upward in FIG. The leaf spring 26 fixed to the substrate 5 constitutes a spring means for urging the link bar 8 in a predetermined direction. The leaf spring 26 has the screw hole 23.
A screw hole is formed at a position facing to, and the adjusting screw 22 is screwed into the screw hole. A return spring 28 is attached to the adjusting screw 22 on the tip side of the leaf spring 26, and one end of the return spring 28 is fixed to the leaf spring 26. The return spring 28 constantly urges the top member 14 in the rightward direction in FIG. The return spring 28 constitutes a spring means for urging the top member 14 in a predetermined direction horizontal to the drawing plate surface.

 Next, the operation of this embodiment will be described.

When the operation head 2 is pitch-fed, first, the pressing portion 12 of the link bar 8 is manually pressed downward until the top member 14 comes into contact with the tip of the adjusting screw 22 and stops. Link bar 8
Rotates about the shaft 10 in the clockwise direction in FIG. 2, and this rotation is transmitted to the top member 14 via the link 16. Top member
The link 14 receives a force in the direction of being pressed onto the drawing plate 4 and a force in the left direction in FIG. 2 against the elastic force of the return spring 28 by the link 16. At this time, since the lower surface of the top member 14 is the friction member 15 having a large friction coefficient with the surface of the drawing board 4,
A large frictional force acts on the top member 14 due to the force in the direction of being pressed upward. The friction member causes the top member 14 to move to the drawing board 4.
Since it does not move up, the hatching device itself moves on the drawing board 4 rightward in FIG. 2 due to the reaction force of the force that moves the top member 14 leftward (see FIG. 3). After all, when the pressing portion 12 is pressed by hand, it is the hatching device itself that moves.

Next, when the pressing portion 12 is released, the link spring 8 is pushed back to its original position by the leaf spring 26, and at the same time, the return spring is returned.
28 also pushes the top member back to its original position. In this case, since the force pressing the top member 14 onto the drawing board 4 does not work, no frictional force acts on the lower surface 15 of the top member 14 and the surface of the drawing board 4, and the hatching device itself does not move. The top member 14 returns to its original position (state shown in FIG. 2). In this state, a line is drawn on the paper on the drawing board 4 by the scale attached to the operation head 2.

By repeating the above operation, the operation head 2 is pitch-fed by a constant width, and the hatching can be performed accurately.

The pitch feed width can be set to an arbitrary value by turning the adjusting knob 24 and moving the adjusting screw back and forth. That is, when the tip end of the feed screw is brought closer to the ruler mounting plate 2 side of the operation head, the movement width of the top member 14 with respect to the substrate 5 becomes smaller and the pitch feed width becomes smaller. Become.

In this embodiment, the hatching device is attached to the operation head by a fixing screw, but the device may be attached to the operation head by a molding.
The scale fixing mall may be shared.

Further, in the present embodiment, the hatching device is attached to the operation head (the ruler mounting plate) of the universal parallel ruler, but it may be attached to the scale part of the parallel ruler. FIG. 4 shows an embodiment in which a hatching device is attached to a parallel ruler, and a hatching device 60 is attached via an adapter 46 to a scale 44 which is connected to a cursor 42 which is reciprocally movable on the rail 40. A mall 48 is used as a connecting means between the mounting portion of the hatching device 60 and the adapter 46,
The hatching device is removable. With the above configuration, the hatching work can be easily performed even with the parallel ruler.

〔effect〕

Since the present invention is configured as described above, even in a drafting machine without a hatching mechanism, the hatching work can be easily performed by attaching the hatching device.
Since the hatching device can be removed, it can be removed when the hatching is not performed to reduce the load on the drafting machine. Further, by installing the hatching device in the vicinity of the scale, there is an effect that evenly-spaced lines can be accurately drawn even when drawing diagonal lines.

[Brief description of drawings]

FIG. 1 is an external view, FIGS. 2 to 3 are front views, and FIG. 4 is an external view showing another embodiment. 5 ... Board, 6 ... Mounting part, 8 ... Link bar, 12 ...
Pressing part, 14 ... Top member, 16 ... Link, 22 ... Adjusting screw, 24 ... Adjusting knob, 26 ... Leaf spring, 28 ... Return spring

Claims (1)

(57) [Scope of utility model registration request] 1. A substrate (5) attachable to a universal parallel ruler operation head or a parallel ruler scale, a link bar (8) having one end rotatably supported by the substrate (5), A spring means (26) for urging the link bar (8) in a predetermined direction and a friction member (15) on the lower surface are arranged so as to be movable on the drawing board (4) surrounded by the base plate (5). Frame member (14) and the link bar (8) at one end
A link (16) rotatably supported by the other end of the frame and the other end rotatably supported by the top member (14), and movement of the top member (14) with respect to the substrate (5). Pitch width adjusting means (22, 24) for adjusting the width to a desired value, and spring means (28) for urging the top member (14) in a predetermined direction horizontal to the drawing plate surface. A hatching device for a drafting machine.