JPH0225666Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a rail-type flexible parallel ruler device that can move rulers at equal intervals along the drawing surface, and in particular, the invention relates to a rail-type flexible parallel ruler device that can move rulers at equal intervals along the drawing surface, and in particular, the invention relates to a rail-type flexible parallel ruler device that can move rulers at equal intervals along the drawing surface, and in particular, This invention relates to an improvement in a fixing mechanism for fixing a slit plate to a rail.

[Background technology and its problems]

Conventionally, for example, a track type rail-type flexible parallel ruler device having a mechanism for feeding the ruler at equal intervals has been known (for example,
(See Publication No. 57-39994). With this parallel ruler device,
A horizontal rail is fixed to the upper edge of the drawing board. A vertical rail is carried perpendicularly to the horizontal rail so as to be able to run freely in the length direction of the horizontal rail.
A carriage is attached to the vertical rail so as to be freely movable, and a ruler is attached to the carriage via a drafting head. Furthermore, slit plates are disposed within the vertical rail at equal intervals so as to be movable in the length direction of the rail. This slit plate is pressed from the side and fixed by tightening a fixing knob arranged at a predetermined position on the side surface of the vertical rail. The carriage is provided with a pawl that engages relatively with the slit plate, and the slit plate and this pawl constitute a mechanism for feeding the ruler at equal intervals.

Next, the operation of the equal interval feeding mechanism will be explained. First, the slit plate is made movable relative to the rail by loosening the fixing knob. Next, the claw is engaged with the now movable slit plate. In this state, by moving the ruler through the drafting head, the slit plate is transported to a predetermined position within the rail. By tightening the fixing knob at this position, the slit plate is fixed to the rail. When the fixed pawl is engaged with the fixed slit plate and the ruler is moved, the ruler can be moved with equal pitches on the drawing board by engaging and disengaging the slit plate and the pawl.

However, a problem arises when this conventionally known slit plate fixing mechanism is applied to a rail-type universal parallel ruler device in which the ruler is movable only in the front-rear direction of the drawing board. In this parallel ruler device, rails are fixed to both the left and right sides of the drawing board, and each of these rails is equipped with a carriage that can move freely in the length direction of the rails. Both ends of a straight ruler are fixed to this carriage via a ruler holder.

In this parallel ruler device, when the holder moves to the fixed knob position on the rail and stops, the fixed knob is hidden directly below the holder, creating a blind spot, making it difficult to adjust the fixed knob. This became a drawback. Furthermore, when the conventional fixing mechanism is applied to a so-called track type device in which a ruler is movably attached to a vertical rail that is movably supported with respect to a horizontal rail,
There was a risk of accidentally moving the vertical rail while adjusting the operating knob, which sometimes caused problems in accurately drawing parallel lines at predetermined intervals.

Further, in this conventional fixing mechanism, the slit plate may be bent and deformed by the pressing force of the knob. When the slit plate is deformed in this manner, a frictional force is generated when the slit plate is moved within the rail, making it difficult to move smoothly, which has been a drawback.

[Purpose of invention]

The present invention was proposed in view of the above circumstances, and provides a slit plate fixing mechanism that allows easy adjustment of the slit plate fixing knob and prevents the slit plate from deforming. The purpose is to

[Summary of the idea]

In order to achieve this object, the present invention provides a ruler, etc., which is composed of equally spaced slit plates arranged on a rail and claws provided on a carriage that can freely travel along the rail and relatively engage with the slit plates. In the rail-type flexible parallel ruler device having an interval feeding mechanism, the slit plate is disposed so as to be movable in the longitudinal direction with respect to the rail, and a rod extending in the longitudinal direction of the slit plate is provided at one longitudinal end of the slit plate. A fixing mechanism for fixing the rod is provided in an end cover that is integrally attached to the rail and is arranged on an end face of the rail, and an operating part of the fixing mechanism is exposed outside of the end cover. .

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is an external plan view of a rail-type universal parallel ruler device according to the present invention. In this parallel ruler device, rails 2 and 3 are fixed to both left and right sides of a drawing board 1. Carriages 4 and 5 are mounted on each of these rails 2 and 3 in a movable manner.

Each of these carriages 4, 5 has a ruler holder 6,
Both ends of a ruler 8 are attached via 7.

Further, as shown in FIG. 2, on one of the rails 2, there are equally spaced slit plates 9 that can run freely in the length direction of the rail 2 along the grooves 2A, 2A carved in the rail 2. It is arranged so that As shown in FIG. 3, this slit plate 9 has slits 9A, 9B, 9C, 9D, and
9E are formed at equal intervals.

Further, as shown in FIG. 2, an engaging pawl unit 10 is fixed on the carriage 4 with screws 11, 11. This engaging pawl unit 10 has each slit 9A, 9B,
Claws 12A, 12 that relatively engage with 9C, 9D, 9E
B, 12C, 12D, and 12E are provided.
By operating the claw selection knob 13 that selectively causes these claws 12 to protrude toward the slit plate 9, one of the claws 12 is selected, and the slits 9A, 9B, 9 formed on the slit plate 9 are selected. 9C,
It is adapted to be relatively engaged with one of 9D and 9E. As a result, the slits 9A, 9B, 9
The ruler 8 can be moved along the drawing board 1 at equal intervals of any one of C, 9D, and 9E.

Next, to explain the fixing mechanism of the slit plate 9, as shown in FIG. It is fixed.

Further, as shown in FIGS. 4 and 5, a substantially L-shaped end plate 16, which constitutes a part of the end cover 15, is fixed to the end face 2B of the rail 2.

Vertical plate portion 16A of this end plate 16
A rod through hole 16B having a diameter larger than the outer diameter of the rod 14 is formed in the rod.

In addition, the horizontal plate portion 16 of the end plate 16
A cylindrical rod holder 17 is fixed on C. A rod through hole 17A having a diameter larger than the outer diameter of the rod 14 is formed in the rod holder 17 in the radial direction.

Further, on the inner periphery of the rod holder 17, a female thread 17B into which a rod fixing pin 18 is screwed is inserted.
is formed so as to reach the position of the through hole 17A.

Further, the fixing pin 18 is attached to the end cover 15.
It protrudes from the upper part of an end face cap 19 that constitutes a part of the holder, and a fixing knob 20 is attached to the tip thereof.

Through hole 16 formed in the end plate 16
The rod 14 of the slit plate 9, which has passed through the rod holder 17 and passed through the through hole 17A formed in the rod holder 17, is moved by screwing the fixing knob 20 (in the downward direction in FIG. 4). It is becoming fixed.

That is, by tightening the fixing knob 20,
The fixing pin 18 threads through a female thread 17B formed on the rod holder 17, and presses the rod 14 against the wall of the through hole 17A. As a result, the rod 14 is fixed to the end plate 16, and the slit plate 9 is fixed to the rail 2.

Next, a description will be given of the operation of the ruler equal-space feeding mechanism, which is composed of the slit plate 9 and the claws 12 provided on the carriage 4, and the slit plate fixing mechanism described above.

First, by loosening the fixing knob 20 (screwing it upward in FIG. 4), the slit plate 9
put it in a movable state.

Next, any one of the claws 12 is engaged with the slit plate 9 which is placed in a movable state. In this state, the ruler 8 is moved to carry the slit plate 9 to a predetermined position within the rail 2. Next, by tightening the fixing knob 20, the slit plate 9 is fixed at its predetermined position. In this state, turn the nail selection knob 13
operate the slits 9A, 9B, 9C, 9D, 9
By engaging one of E, the ruler 9 can be moved over the drawing board 1 by equal distances.

In this way, by fixing the slit plate 9 to the end plate 16 that constitutes a part of the rail end cover 15, the ruler holder 6, which is integrated with the carriage 4, can be fixed no matter where on the rail 2 it moves and stops. The knob 20 does not become a blind spot of the holder 6, and the knob 20 can be easily adjusted.

Further, as described above, the slit plate fixing mechanism has a small number of component parts and is simple in structure. Thereby, the parts cost of the fixing mechanism can be reduced, and assembly can be easily performed.

Also, unlike the conventional fixing mechanism in which the slit plate is fixed by pressing it from the side, the slit plate 9 is fixed to the rail 2 by fixing the rod 14 fixed to the slit plate 9. Therefore, the slit plate 9 will not be deformed in a curved manner. Therefore, smooth movement of the slit plate 9 can be ensured at all times.

In the above embodiment, the fixing knob 20 is attached to the upper part of the end cap 19, but it may be attached to the side surface of the end cap 19.

Furthermore, it goes without saying that the present invention can be applied to a track type rail type universal parallel ruler device.

[Effect of idea]

As is clear from the above explanation, since the operating part of the slit plate fixing mechanism is exposed outside the end cover, the operating part can be attached to the ruler holder as in the past, no matter where the carriage is located. There is nothing hidden directly under the control panel, so you can always visually check the operating section and make accurate adjustments easily at hand.

Furthermore, even when applied to a so-called track type, the risk of accidentally moving the vertical rail during adjustment is completely eliminated.

In addition, in the present invention, the rod extends in the length direction of the slit plate and a fixing mechanism is provided for the rod, so there is no possibility of the slit plate being bent and deformed, and the fixing operation can be repeated repeatedly. It is guaranteed that a large number of parallel lines will always be drawn accurately and efficiently, even if

Furthermore, the slit plate fixing mechanism has a small number of component parts, is simple in structure, is advantageous in terms of cost, and is easy to assemble.

[Brief explanation of the drawing]

FIG. 1 is an external plan view of a rail-type universal parallel ruler device showing an embodiment of the present invention, FIG. This figure is a plan view of the equally spaced slit plate, FIG. 4 is a vertical cross-sectional side view of the rail end cover showing the fixing mechanism of the slit plate, and FIG. 5 is a perspective view of essential parts showing the rail end cover portion. 1... Drawing board, 2, 3... Rail, 4, 5... Carriage, 8... Ruler, 9... Equally spaced slit plate, 12... Claw, 14... Rod, 15... End cover, 16 ...End face plate, 17...Rod holder, 18...Rod fixing pin, 19...End face cap, 20...Fixing knob.

Claims (1)

[Scope of utility model registration request] A rail-type universal parallel ruler device having a mechanism for feeding a ruler at equal intervals, which is composed of an equally spaced slit plate arranged on a rail and a claw provided on a carriage that can freely travel along the rail and relatively engages with the slit plate. The slit plate is disposed so as to be movable in the length direction with respect to the rail, and a rod extending in the longitudinal direction of the slit plate is integrally attached to one end of the slit plate in the length direction, and the rail end surface of the rail is A rail-type flexible parallel ruler device comprising: a fixing mechanism for fixing the rod within an end cover disposed on the rod; and an operating part of the fixing mechanism exposed outside the end cover.