JP3143827B2 - Parallel ruler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parallel ruler, and more particularly, to a parallel ruler capable of sharing parts for performing various functions of the parallel ruler as much as possible.

[0002]

2. Description of the Related Art Generally, a parallel ruler comprises a pair of guides disposed on both sides of a drawing plate, a hinge member rotatably provided on a slider movable along these guides, and a left and right hinge member. It comprises a scale that is bridged, pulleys and wires for moving the slider, and the like. In this type of parallel ruler, when a scale slides on a paper surface set on a drawing board, a scale floating mechanism for slightly floating the scale from the paper surface to protect the paper surface from contamination, and an edge of the paper surface. A scale angle adjustment mechanism or the like that can correct the parallelism between the edge and the edge of the scale is employed.

As the scale floating mechanism, for example,
As disclosed in Japanese Utility Model Registration No. 2508308, a configuration is known in which a slider is floated using a spring, and the biasing force of the spring can be appropriately adjusted by advancing and retreating a screw. On the other hand, the scale angle adjusting mechanism enables the engagement with the belt for moving the slider to be appropriately released, as shown in, for example, Japanese Patent Application Laid-Open No. 4-62198. A configuration is known in which the slider is displaced to a forward or backward position with respect to the slider.

[0004]

However, in the known scale floating mechanism, a screw for adjusting the biasing force of the spring is an essential component, and there is a disadvantage that the number of components is increased. In addition, the scale angle adjusting mechanism requires a dedicated part for sandwiching the belt in order to release the engagement with the belt, and also requires an assembling operation in a narrow space, resulting in poor workability. is there.

In the conventional parallel ruler, there is a conventional ruler provided with legs for inclining the drawing plate at a predetermined angle on the back side on the depth side of the drawing plate. No adjustable configuration is employed. for that reason,
In the case where an angle corresponding to the individuality of the tracer is provided, the angle is actually corrected while using a book or the like as a spacer.

[0006]

SUMMARY OF THE INVENTION The main object of the present invention is to provide a parallel ruler capable of reducing the number of parts by effectively utilizing parts exhibiting various functions and achieving a significant reduction in manufacturing cost. Is to do.

Another object of the present invention is to provide a parallel ruler capable of adjusting the inclination angle of a drawing board in multiple steps.

[0008]

[0009]

Means for Solving the Problems The above-mentioned main object is achieved.
Therefore, the present invention provides a pair of guides disposed on both sides of a drawing board, a slider provided to be movable along the front-rear direction of each guide, and one end supported by the slider and the other end rotated. Hinge members provided so that they can be provided, and a scale spanned between the free ends of these hinge members,
In a parallel ruler provided with a scale angle adjusting mechanism provided between any one of the sliders and the hinge member, the scale angle adjusting mechanism includes a slot hole formed along the front-rear direction of the slider, An adjusting screw shaft that penetrates the slot hole and is movably provided along the extending direction of the slot hole, and is rotatably mounted on the adjusting screw shaft at a position on the inner surface side of the hinge member so as to pass through the guide. Rollable rollers, and an adjusting knob screwed to the adjusting screw shaft at an outer surface side position of the hinge member, and when the adjusting knob is loosened, the outer peripheral groove of the roller is aligned with the guide. The adjusting screw shaft is provided so as to be capable of moving in the extending direction in the slot hole by causing play, and when the adjusting knob is tightened, the outer peripheral groove of the roller is pressed against the guide to perform the adjustment. Flip movement of the shaft is arranged to be regulated, take the configuration of, which also is obtained by trying to achieve the aforementioned objectives. With this configuration, the angle of the scale can be adjusted only by adjusting the screwing positions of the adjustment screw shaft that supports the rollers and the adjustment knob, and a simple structure that combines the roller support structure and the scale angle adjustment mechanism. Can be achieved.

[0010]

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the parallel ruler according to the present invention, on the rear surface on the depth side of the drawing plate, an inclination angle adjusting leg of the drawing plate is arranged.
A configuration in which the inclination angle adjusting leg is provided so as to enable at least two-stage height adjustment can also be adopted. As a result, the height can be adjusted according to the personality of the tracer, and the necessity of using a nearby book or the like as a spacer can be eliminated.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the terms "left" and "right" are used with reference to FIG. 1 unless otherwise specified, and "front and rear" are used in the vertical direction in the figure.

FIG. 1 is a plan view of a parallel ruler according to this embodiment, and FIG. 2 is a cross-sectional view of the parallel ruler. FIG. 3 is a right side view of FIG. In these figures, the parallel ruler 10 is provided so as to be movable in the front-rear direction along guides 12 fixed to the left and right ends of the drawing board 11 and rail portions 12A formed on the outside of these guides 12, respectively. Left and right sliders 14 and 15, a drive transmission mechanism 17 for moving these sliders 14 and 15 in the front-rear direction, and a hinge member having one end supported by each slider 14 and 15 and the other end rotatably provided 1
8, 19, a scale 20 spanned between the hinge members 18, 19, covers 21, 22 mounted on the outer surfaces of the hinge members 18, 19, and an upward attachment to the hinge members 18. Applying power and drawing scale 20
Scale floating mechanism 2 for slightly floating from the upper surface of 1
5 and the hinge member 1 provided on the hinge member 19 side.
A scale angle adjusting mechanism 26 that enables the front-rear relative movement of the slider 9 and the slider 15, and a tilt angle adjusting leg 27 that is fixed to the back side on the depth side of the drawing board 11 and adjusts the angle of the drawing board 11.
It is comprised including.

The drive transmission mechanism 17 is basically constructed on the same principle as a known parallel ruler. That is, in the pair of guides 12, pulleys 30 and 31 disposed at respective front and rear positions thereof,
Endless wires 32 wrapped around 0, 31. The left and right sliders 1
4 and 15, the slider 14, 14
15 can be moved synchronously in the front-back direction. Here, pulleys 30 and 31 are provided at both front and rear ends of the guide 12.
Caps 33 and 34 each having an arm capable of supporting the same can be fitted.
A pulley supporting structure using the pulley 34 is adopted.

As shown in FIGS. 4 and 5, one of the sliders 14, 15 houses a roller 35 (see FIG. 2) which rolls on the rail 12A of the guide 12, as shown in FIGS. Roller housings 37 for supporting the shafts are provided at two front and rear positions, and between the roller housings 37, an insertion portion 40 of a screw 38 for fixing the wire 32 is provided.
Is provided. The slider 14 adjacent to the insertion portion 40 is provided with an engagement hole 43 drilled at substantially equal intervals along the vertical direction. The right side of the slider 14 in FIG. A mounting hole 46 for a screw shaft 45 as a support shaft inserted from the outer surface side of the cover 21 is formed. Here, a bush 47 is arranged around the axis of the screw shaft 45, and a spring 49 is mounted on the outer peripheral surface of the bush 47.

As shown in FIGS. 6 and 7, the spring 49 has a coil portion 49A and straight portions 49B and 49C oriented in a direction away from the coil portion 49A.
And a substantially L-shaped portion 49E formed on the tip side of the other straight portion 49C and a U-shaped folded portion 49D formed on the tip side of one straight portion 49B. 49B and 49C have a shape separated from each other in a no-load state. The spring 49 has a linear portion 4
The U-shaped folded portion 49D can be engaged with the linear portion 49C by approaching so as to reduce the separation width between 9B and 49C. Here, the tip of the substantially L-shaped portion 49E is
The straight portion 49 </ b> B is inserted into the engagement hole 43 and fixed, while the hinge member 1 is inserted from the inner surface side of the cover 21.
8, the free end side of the hinge member 18 and the cover 21 is urged clockwise in FIG. 5 around the screw shaft 45 as a center of rotation. The scale 20 bridged between the hinge members 18 and 19 can be lifted from the upper surface of the drawing board 11. Here, the engagement hole 4
3 and a bush 47 arranged on the outer peripheral side of the screw shaft 45
, The spring 49 wound around the bush 47 and the pin shaft 51 constitute the scale floating mechanism 25.

As shown in FIGS. 3, 8, and 9, the right slider 15 is provided with a rail 12A of the guide 12.
A roller storage portion 56 for storing and supporting the rollers (not shown) rolling on the upper side, and holes 60 and 61 for inserting a slider stopper screw 57 and a wire fixing screw 58 at a position adjacent to the roller storage portion 56. In the front end side area of the slider 15, that is, in the left half area in FIG.
5, a slot hole 6 extending in the front-rear direction (longitudinal direction)
3 is provided. As shown in FIG. 2, an adjustment screw shaft 65 is inserted into the slot hole 63, and a roller 67 is attached to an inner end of the adjustment screw shaft 65. Here, the outer peripheral groove width of the roller 67 is
Is set to have a certain play with respect to the rail portion 12A.

As shown in FIG. 2, the right end of the adjusting screw shaft 65 extends outward through the hinge member 19 and the cover 22, and an adjusting knob 70 is screwed and connected to a region protruding from the cover 22. ing. In the adjustment screw shaft 65, the slider 15 is located near the roller 67.
The nut 72 located inside is screwed. Further, a washer 75 is interposed between the outer surface of the hinge member 19 and the inner end surface of the adjustment knob 70, so that when the adjustment knob 70 is loosened, the outer circumferential groove of the roller 67 guides. The adjusting screw shaft 65 is provided so as to be slightly movable in the extending direction of the slot hole 63 by causing backlash to the rail portion 12A of the twelve 12 while the outer peripheral groove of the roller 67 when the adjusting knob 70 is tightened is the rail. The adjustment screw shaft 65 can be restricted from moving by being pressed against the portion 12A.

The inclination angle adjusting leg 27 of the drawing plate 11 is
As shown in FIGS. 2 and 3, a base 77 fixed to the back surface of the drawing board 11, a first leg 78 rotatably supported by the base 77, and a first leg 78. The second leg 80 is rotatably connected to the free end via a pin 79. The first leg 78 has a concave cross-sectional shape, and the second leg 80 is
When folded in the direction of the middle arrow A, it is received in a region that has been recessed. Also, the first leg piece 7
8 is foldable in the direction of arrow B in the figure, whereby the height of the drawing board 11 on the depth side can be set to the lowest.

In FIG. 1, reference numeral 81 denotes a pen tray.

Next, the operation of each mechanism in the above embodiment will be described.

In the scale levitation mechanism 25, when adjusting the levitation force or the urging force of the scale 20 upward, it is possible to change the engagement position of the substantially L-shaped portion 49E. For example, in the state of FIG. 5, when the engagement position of the substantially L-shaped portion 49E is shifted by one position upward, the L-shaped portion is picked up with a finger, pulled out from the engagement hole 43, and raised one step higher. It is performed by inserting it into the engagement hole 43. Then, the linear portion 4 of the spring 49
Since the position of 9C increases, the linear portion 49B that is spring-biased in a direction away from the position 9C also attempts to be displaced to a higher position. Therefore, the pin shaft 51 with which the linear portion 49B is engaged receives a floating force upward, and the floating amount of the scale 20 is increased accordingly. Here, when the scale 20 is pressed against the paper set on the drawing board 11, only the linear portion 49B is forcibly pressed down. This pressing force is released, and the scale 20 is released. When the scale 20 is moved in the vertical direction, the scale 20 can be moved while being floated again.

Further, the scale angle adjusting mechanism 26 includes:
When the adjustment knob 70 is loosely screwed onto the adjustment screw shaft 65, the outer circumferential groove of the roller 67 mounted on the adjustment screw shaft 65 has a certain play and the rail portion 12 of the guide 12 has a certain play.
At this time, the adjustment screw shaft 65
Can be moved along the slot hole 63 by a fixed amount. Incidentally, in the present embodiment, each is provided so as to be able to move about 5 mm along the extending direction of the slot hole 63. Therefore, even if there is a slight deviation in the parallelism between the edge of the paper surface set on the drawing board 11 and the edge of the scale 20, fine adjustment of the angle of the scale 20 allows the edge of the scale 20 to be adjusted. And the edge of the paper surface can be corrected. Then, in a state where such correction is completed, the adjustment knob 70 is tightened, so that the roller 6
7 and the rail portion 12A are pressed against each other, and the corrected scale angle can be stably held.

Further, the inclination angle adjusting leg 27 raises the first leg 78 in a state where the second leg 80 is folded into the first leg 78 so that the depth of the drawing board 11 can be reduced. Side can be set at a position higher than the near side, and when it is desired to set the position higher, the second leg 80 is connected to the first leg 7.
8 may be made to protrude from the front end.

In the above-described embodiment, the structure in which the substantially L-shaped portion 49E of the spring 49 is engaged with the engagement hole 43 is shown. However, the present invention is not limited to this. The engagement grooves formed by partially recessing the surface may be dotted. However, in order to prevent inadvertent misalignment of the substantially L-shaped portion 49E, it is preferable to use the engaging hole 43 illustrated and described.

The moving range of the adjusting screw shaft 65 for adjusting the angle of the scale 20 is not limited to the above embodiment, but can be made to be movable in a larger range. Further, the washer 7 employed in the scale angle adjusting mechanism 26 is provided.
5 can of course adopt a configuration that substitutes for a bush.

Further, the inclination angle adjusting leg 27 of the drawing board 11
Is not limited to two stages, and may be configured as a multistage type. In short, the present invention only needs to be configured so that a desired angle setting that differs for each tracer can be realized.

[0028]

As described above, according to the present invention,
Since the one end of the spring is engaged with the hinge member, and the other end is engaged with an engagement hole or an engagement groove formed in the slider, the scale is provided so as to be able to float above the upper surface of the drawing plate. The floating mechanism using the supporting shaft can be configured, and there is no need for a separate member dedicated to supporting the spring, so that the number of parts can be reduced.

Further, since the scale floating mechanism employs a plurality of engagement holes or the like which can appropriately change the engagement position of the spring, there is no need to use a screw or the like for adjusting the biasing force of the spring. .

Further, since the scale angle adjusting mechanism uses the support shaft of the roller for moving the slider, sharing of parts can be achieved from this point, and further reduction in manufacturing cost can be achieved. Can be. Moreover, according to the common use of these components, the area of the configuration incorporated in the slider is reduced, so that downsizing can also be achieved.
A similar function can be provided even when a small parallel ruler is manufactured.

Further, since the inclination angle adjusting leg which can adjust the height stepwise is provided on the depth side rear surface of the drawing board, the height adjustment according to the individuality of the tracer can be performed.
It is also possible to eliminate the necessity of using a nearby book or the like as a spacer.

[Brief description of the drawings]

FIG. 1 is a plan view of a parallel ruler according to an embodiment.

FIG. 2 is a schematic cross-sectional view of the parallel ruler.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a sectional view showing a scale levitation mechanism.

FIG. 5 is a front view of the scale floating mechanism.

FIG. 6 is a side view of a no-load spring constituting the scale floating mechanism.

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a front view of a right slider for describing a scale angle adjusting mechanism.

FIG. 9 is a sectional view of the slider.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Parallel ruler 12 Guide 14 Slider 15 Slider 18 Hinge member 19 Hinge member 20 Scale 25 Scale floating mechanism 26 Scale angle adjustment mechanism 27 Inclination angle adjustment leg 43 Engagement hole 47 Bush 49 Spring 63 Slot hole 65 Adjustment screw shaft 70 Adjustment knob

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-179800 (JP, A) JP-A-8-11490 (JP, A) JP-A-47-41866 (JP, A) JP-A-8-181 11491 (JP, A) Japanese Utility Model 7-2089 (JP, U) Japanese Utility Model 56-176896 (JP, U) Japanese Utility Model 56-102094 (JP, U) (58) Field surveyed (Int. ⁷ , DB name) B43L 13/02

Claims (2)

(57) [Claims] 1. A pair of guides disposed on both sides of a drawing plate, sliders provided movably along the front-rear direction of each guide, and one end supported by the slider and the other end rotatable. In the parallel ruler provided with the provided hinge member, a scale spanned between the free ends of these hinge members, and a scale angle adjustment mechanism provided between any one of the sliders and the hinge member, The scale angle adjustment mechanism includes a slot hole formed along the front-rear direction of the slider, an adjustment screw shaft that penetrates the slot hole and is provided so as to be movable along an extending direction of the slot hole. A roller rotatably mounted on the adjusting screw shaft at an inner surface position of the hinge member and capable of rolling on the guide; and screwing with the adjusting screw shaft at an outer surface position of the hinge member And when the adjustment knob is loosened, the outer peripheral groove of the roller causes play in the guide, and the adjustment screw shaft is provided so as to be movable in the extending direction in the slot hole. On the other hand, when the adjustment knob is tightened, the outer peripheral groove of the roller is pressed against the guide so that the movement of the adjustment screw shaft is regulated so as to be provided. 2. A tilt angle adjusting leg of the drawing board is arranged on a rear surface on a depth side of the drawing board, and the tilt angle adjusting leg is provided so as to be capable of at least two-stage height adjustment. parallel ruler according to claim 1 Symbol mounting and.