JP2879166B2 - Parallel ruler device - Google Patents

Description

The present invention relates to a belt driven parallel ruler.

2. Description of the Related Art Conventionally, there are a wire driving system and an interlocking shaft type timing belt system in a horizontal ruler guide mechanism for moving a horizontal ruler in parallel along a vertical rail when a horizontal ruler is driven manually.

In the wire driving method, as shown in Japanese Utility Model Publication No. 61-11026, both ends of the horizontal ruler are configured to move by the same amount along the vertical rail in the same direction by the movement transmitting action of the wire. In the interlocking shaft type timing belt system, pulleys are rotatably supported at both ends of left and right vertical rails, and endless timing belts are stretched over the pulleys. Both ends of the horizontal ruler are connected to a timing belt via a vertical cursor movably attached to a vertical rail. The pulleys rotatably supported by the left and right vertical rails are connected by a transmission shaft, and these configurations enable the horizontal ruler to move in parallel.

[Problems to be solved by the invention]

Since the wire used in the wire driving method is basically an aggregate of thin wires, the wire is loosened by tension or friction with a pulley, and there is a possibility that the wire may be broken. Also, to tilt the horizontal ruler,
When the clutch mechanism provided between the wire and the vertical cursor for pinching the wire is in a half-clutch state,
There was a defect that the wire was cut by the frictional force with the clutch plate.

In the above-mentioned interlocking shaft type timing vector system, if a clutch mechanism that sandwiches the timing belt is provided, the thread of the timing belt may be damaged by sliding with the clutch plate.Therefore, the clutch mechanism is provided in the interlocking shaft part. A defect that complicates the structure.

An object of the present invention is to eliminate the above defects.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a pair of vertical rails 6, 8 arranged in parallel on both sides of the drawing board 2,
Belt pulleys 34 and 36 rotatably supported one at a time at one end of each of the vertical rails 6 and 8, and shafts substantially perpendicular to the drawing board 2 surface at a pair at each of the other ends of the vertical rails 6 and 8. The belt pulleys 40, 42, 44, 46 rotatably supported on the upper side, and the belt pulleys 34, 40, 42 such that a pair of linear running portions is formed along each of the vertical rails 6, 8. , 44, 46, 36, an endless flat belt 48, and each of the pair of vertical rails 6, 8 of the flat belt 48 movably attached to each of the pair of vertical rails 6, 8. A pair of vertical cursors 10 and 12 connected to a straight running section along the vehicle, and a horizontal ruler 24 having both ends connected to the vertical cursors 10 and 12; one of the pair of vertical cursors Fix the clutch plate 48,
A shaft body 59 with a molding 52 is screwed onto the vertical cursor 10, and the flat belt is provided between the tip of the shaft body 50 and the clutch plate 48.
48 linear running parts 48a are arranged, and the linear running part 4 of the flat belt 48 is pinched and fixed between the clutch plate 48 and the tip of the shaft body 50, and is rotatably mounted on one end of each of the vertical rails 6, 8. The rotation center axes of the supported belt pulleys 34, 36 are perpendicular to the drawing board 2 in a plane perpendicular to the drawing board 2 at an angle to the longitudinal direction of the vertical rails 6, 8. And horizontal.

[Action]

When the horizontal ruler 24 is manually pressed in the longitudinal direction of the vertical rails 6 and 8 to apply a moving force to the horizontal ruler 24, the belt 48 at the one end side moves with the movement of the horizontal ruler 24 at one end side. A straight traveling unit connected to one end of the horizontal ruler 24 of the pair of straight traveling via the vertical cursor 10 is driven. By this driving, the other end of the horizontal ruler 24 is driven along the vertical rail 8 by the movement of the belt 48 by the same amount in the same direction as the movement of the one end, and the horizontal ruler 24 is moved by the vertical rails 6,8. Translate along.

〔Example〕

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

Reference numeral 2 denotes a drawing board to which a pencil receiver 4 is attached.
A pair of vertical rails 6 and 8 are fixed to both ends of the drawing board 2 so as to be parallel to each other. The vertical rails 6, 8 are formed of hollow members having a square cross section. The vertical rail
Vertical cursors 10 and 12 are movably attached to 6 and 8 via rollers, respectively. The vertical cursor 10
A vertical portion 14a of the mounting plate 14 is rotatably supported by a shaft 16, and a horizontal portion 14b of the mounting plate 14 has one end of a ruler holder 18 rotatable about a shaft 20 and a long hole 22b of the horizontal portion 14b. Is slidably supported along. Of the ruler holder 18,
The mechanism for attaching the other vertical cursor 12 is the same as the mechanism shown in FIG. The ruler holder 18 has a horizontal ruler 24
Has been fixed. Pulley support shafts 26, 28 are inclinedly supported by fixtures 30, 32 on the bottom wall of each end of the vertical rails 6, 8, and belt pulleys 34, 36 are rotatable on the support shafts 26, 28. It is fitted. As shown in FIGS. 3 and 5, the pulley support shafts 26, 28 are perpendicular to the drawing board 2 and perpendicular to the vertical rails 6, 8 in a plane perpendicular to the drawing board 2 plane. About 30 degrees with respect to the axis L. At the other end of each of the vertical rails 6 and 8, a pulley support shaft 38 (see FIG. 6) perpendicular to the drawing board 2 is disposed as shown in FIG. A pair of belt pulleys 40, 42 and 44, 46 are rotatably fitted respectively. The pulleys 34, 40, 42, 44, 46, 36
As shown in FIG. 1, an endless flat belt 48 is stretched around with an appropriate tension. Pulley 34,40
The vertical cursor 10 is connected to the lower straight-line running portion 48a of the belt 48 therebetween via a clutch mechanism. In the clutch mechanism, as shown in FIG. 4, a clutch plate 48 is fixed to the vertical cursor 10, and a tip of a shaft body 50 with a molding 52 screwed into a screw hole of the vertical cursor 10 is attached to the clutch plate 48. The lower straight running portion 48a of the flat belt 48 is disposed between the front end of the shaft body 50 and the clutch plate 48 so as to face each other. Pulley 36
The upper straight running portion 48b of the flat belt 48 between the pulley 46 and
The vertical cursor 12 is connected via a known belt fixing means 54. The vertical cursor 12 is configured to be detachably fixed to the vertical rail 8 by a known brake mechanism (not shown) having a brake lever 56.

 Next, the operation of the present embodiment will be described.

If you want to adjust the angle of inclination of the horizontal ruler 24,
To make the both ends of the ruler holder 18 slidable with respect to the elongated hole 22 and rotatable with respect to the shaft 20, and the vertical cursor 12 is fixed to the vertical rail 8. Further, the molding 52 is rotated to release the clamping force between the shaft body and the clutch plate 48 against the flat belt 48, and the clamping force is half-clutched, so that the vertical cursor 10 is independent of the vertical cursor 12, The movable state is set along the rail 6. Next, the vertical cursor 12 is moved along the vertical rail 6 to set the horizontal ruler 24 to a desired inclination angle. When the vertical cursor 10 moves along the vertical rail 6, the clutch plate 48 slides in a half-clutch state while making contact with the flat belt 48.

Next, the molding 58 is rotated in the tightening direction to fix both ends of the ruler holder 18 to the horizontal portion 14b of the mounting plate 14, and the molding 52 is rotated in the tightening direction so that the clutch plate 48 and the shaft 50 are rotated. The vertical cursor 10 is fixed to the belt 48 by holding the belt 48 therebetween.

Next, the fixing of the vertical cursor 12 to the vertical rail 8 is released, and the horizontal ruler 24 is manually pressed in a direction horizontal to the drawing board 2 surface and perpendicular to the longitudinal direction of the horizontal ruler 24, When the horizontal ruler 24 is pushed, the lower straight running portion 48a of the belt 48 at the one end side is driven with the movement of the one end of the horizontal ruler 24, and the driving force Running unit 48b
And the both ends of the ruler holder 18 are guided in the same direction by the movement of the belt 48, and the horizontal ruler 24 is
Translate along 6,8. Note that the twist of the belt 48 between the pulley 34 and the pulleys 40 and 42 and between the pulley 36 and the pulleys 44 and 46 is set to a minimum by the inclination of the pulleys 34 and 36, and the belt 48 is , 44,46,36 and move smoothly.

〔effect〕

Since the present invention uses a flat belt as described above, there is no danger of cutting like a wire due to frictional force with a pulley. Also, even if a clutch mechanism is provided between the vertical cursor and the flat belt to slide the clutch plate and the flat belt, the flat belt slides against the clutch plate,
There is no danger of the flat belt breaking. In addition, since the pulleys facing the pair of upper and lower pulleys are inclined, the twist of the flat belt can be set to a minimum, and the flat belt runs smoothly between the pulleys.

[Brief description of the drawings]

1 is an overall external view, FIG. 2 is a plan view, FIG. 3 is a sectional view, FIG. 4 is a sectional view, FIG. 5 is a sectional view, and FIG. 6 is a sectional view. 2 ... Drawing board, 4 ... Pencil holder, 6,8 ... Vertical rail, 10,12 ... Vertical cursor, 14 ... Mounting plate, 16 ... Shaft support, 18 ... Ruler holder, 20 ...
Shaft, 22 ... Long hole, 24 ... Horizontal ruler, 26,28 ... Support shaft, 30,32 ... Fixing tool, 34,36 ... Belt pulley, 38 ... Support shaft, 40,42,44,46 ... Belt pulley, 48 ... clutch plate, 50 ... shaft, 52 ... molding,
54: Belt fixing means, 56: Brake lever.

Claims (2)

(57) [Claims] 1. A pair of vertical rails 6, 8 arranged in parallel on both sides of a drawing board 2, and a belt pulley 34 rotatably supported by one end of each of the vertical rails 6, 8 respectively. , 36 and belt pulleys 40, 42, which are rotatably supported on shafts substantially perpendicular to the drawing board 2 surface, one pair at each other end of the vertical rails 6, 8 respectively.
44, 46 and the belt pulleys 34, 40, 4 so as to form a pair of straight running portions along each of the vertical rails 6, 8.
An endless flat belt 48 stretched over 2,44,46,36 and a pair of the vertical rails 6,8 of the flat belt 48 movably attached to the pair of vertical rails 6,8, respectively. A pair of vertical cursors 10, 12 connected to straight running sections along each
And a horizontal ruler 24 having both ends connected to the vertical cursors 10 and 12.
A clutch plate 48 is fixed to one vertical cursor 10 of the pair of vertical cursors, a shaft 50 with a molding 52 is screwed to the vertical cursor 10, and a tip of the shaft 50 and the clutch The linear running portion 48a of the flat belt 48 is disposed between the clutch plate 48 and the plate 48.
A parallel ruler device fixed by pinching between the shaft and a tip of a shaft body 50. 2. A belt pulley 34, 36 rotatably supported at one end of each of the vertical rails 6, 8 has a rotation center axis connected to the vertical rail.
6. A plane perpendicular to the longitudinal direction of the drawing plate, and inclined in a plane perpendicular to the drawing plate surface between the drawing plate and the drawing surface. 2. The parallel ruler according to claim 1.