GB2042744A - Rail Type Parallel Drafting Device - Google Patents
Rail Type Parallel Drafting Device Download PDFInfo
- Publication number
- GB2042744A GB2042744A GB7943225A GB7943225A GB2042744A GB 2042744 A GB2042744 A GB 2042744A GB 7943225 A GB7943225 A GB 7943225A GB 7943225 A GB7943225 A GB 7943225A GB 2042744 A GB2042744 A GB 2042744A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rail
- vertical rail
- drawing board
- tail portion
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 description 34
- 238000010276 construction Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 230000003247 decreasing effect Effects 0.000 description 10
- 229920001971 elastomer Polymers 0.000 description 7
- 239000005060 rubber Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C39/00—Relieving load on bearings
- F16C39/06—Relieving load on bearings using magnetic means
- F16C39/063—Permanent magnets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
- B43L13/04—Guides for rulers
- B43L13/045—Guides for rulers with carriages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/0408—Passive magnetic bearings
- F16C32/0423—Passive magnetic bearings with permanent magnets on both parts repelling each other
- F16C32/0434—Passive magnetic bearings with permanent magnets on both parts repelling each other for parts moving linearly
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Toys (AREA)
- Drawing Aids And Blackboards (AREA)
Abstract
A rail type parallel drafting device comprising a drawing board 1, a horizontal rail 2 fixed to the drawing board, a horizontal cursor 4 mounted shiftably on the horizontal rail, a vertical rail 6 connected to the horizontal cursor swivellably in a plane perpendicular to the surface of the drawing board, and a head mounted shiftably on the vertical rail, wherein a magnetic member 13 is disposed along a travel path of a tail portion 6a of the vertical rail, and a further magnetic member 14 is disposed at the side of the tail portion of the vertical rail, the magnetic members 13, 14 being of like polarity so as to repel one another and reduce friction between the rail 6 and the board 1. <IMAGE>
Description
SPECIFICATION
Rail Type Universal Parallel Ruler Device
The present invention relates to a rail type universal parallel ruler device.
In conventional rail type universal parallel ruler devices, a tail portion of a vertical rail is mounted shiftably on the surface of a drawing board or a guide surface parallel thereto by means of a roller.
Accordingly, when the tail portion of the vertical rail is shifted along the surface of the drawing board or the guide surface parallel thereto, rolling friction occurs between the roller and the surface of the drawing board. Shifting of the vertical rails becomes difficult because of this frictional force, and also noise occurs due to the travelling of the roller. As a result, a head mounted on the vertical rail is unable to shift on the drawing board in a desired direction quietly by a light force.A rail type universal parallel ruler device has been developed by the same applicant as for the present application in order to eliminate the foregoing drawback, wherein a magnet is disposed over the entire length of the surface of the drawing board, and a magnet is disposed at the tail portion side of the vertical rail, and the tail portion of the vertical rail is energized in a direction of floating from the surface of the drawing board by the magnetic force of both the magnets, and the contact pressure and the rolling friction of the roller and the surface of the drawing board are decreased by the energizing force.
However, this device is unable to completely eliminate the foregoing drawback as the roller contacts the surface of the drawing board.
The present invention provides a rail type universal parallel ruler device, comprising a drawing board, a horizontal rail mounted on the drawing board, a horizontal cursor mounted shiftably on the horizontal rail, a vertical rail connected to the horizontal cursor swivellably in a plane perpendicular to the surface of the drawing board, and a head mounted shiftably on the vertical rail, wherein a magnetic member is disposed along a travel path of a tail portion of the vertical rail, and a further magnetic member is disposed at the side of the tail portion of the vertical rail, and wherein the tail portion side of the vertical rail is energized in a floating direction from the surface of the drawing board or a guiding member parallel thereto by the magnetic force working between both the said magnetic members.
Thus by means of the present invention the vertical rail may be lightly and smoothly shifted by utilizing the magnetic force of the magnetic members. Moreover, the head may be smoothly and quietly shifted by a light force by causing the tail portion of the vertical rail to completely float relative to the surface of the drawing board or the guide surface parallel thereto by the magnetic force of the magnetic members.
The vertical rail may be slightly and smoothly shifted by causing the magnetic floating force on the tail portion of the vertical rail not to work on the vertical rail as the rotary force centering around the axis in its longitudinal direction.
The magnetic members disposed on the tail portion of the vertical rail and the guiding member may be formed by a plurality of rows of magnetic pole tracks and thereby the magnetic floating gap between the tail portion of the vertical rail and the guiding member may be slightly changed by the change of load applied to the vertical rail.
In the ruler device according to the invention, whenever the inclined angle of the drawing board is changed, the load of the tail portion of the vertical rail perpendicular to the guiding member is changed. For this reason, for floating the tail portion of the vertical rail by the magnetic force, when the load of the tail portion of the vertical rail perpendicular to the guiding member is changed, the opposed gap between the tail portion of the vertical rail and the guiding member is greatly changed by the magnetic force working between them.
As a result, the parallel orientation of the vertical rail relative to the surface of the drawing board is lost, which gives rise to poor contact of the vertical rail on the surface of the drawing board.
The present invention aims to eliminate this drawback by arranging a plurality of magnetic pole tracks on the parallel opposed portions of the til portion of the vertical rail and the guiding member.
This is achieved because, as the magnetic member is separated from the magnet pole surface of the magnet, the magnetic flux density in the magnetic member is attenuated, but it is remarkably attenuated in the increased number of rows of magnets as compared with the decreased number of rows of magnets. Accordingly, if the number of rows of magnets is increased, if one of the opposed magnets is caused to float relative to the other magnet by the repulsion magnetic force, and when the load applied from the magnet to the other magnet is changed from a maximum value to a minimum value, in order to minimize the change of the opposed gap between the pair of magnets, the rows of magnets, namely the magnetic pole tracks, may be increased in a plurality of rows arranged in parallel.
Fine adjustment may be made of the position relation of a plurality of rows of magnetic pole tracks at the tail portion side of the vertical rail and a plurality of rows of magnetic pole tracks at the drawing board side in a direction parallel to the vertical rail so that the same pole surfaces are mutually opposed accurately.
The vertical rail may be shifted by a light force by decreasing the rotary moment centering around the longitudinal axis of the vertical rail by the weight of the head by the repulsion force.
The invention will be further described, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a general plan view of one rail type universal parallel ruler device;
Figure 2 is a side view showing one embodiment of a magnetic floating mechanism;
Figure 3 is a side view showing another embodiment of a magnetic floating mechanism;
Figure 4 is a general plan view of another rail type universal parallel ruler device;
Figure 5 is an elevation showing another embodiment of a magnetic floating mechanism;
Figure 6 is a side view of the magnetic floating mechanism shown in Figure 5;
Figure 7 is a side view illustrating the operation of the magnetic floating mechanism shown in
Figures 5 and 6;
Figure 8 is an elevation showing another embodiment of a magnetic floating mechanism;;
Figure 9 is a side view of the magnetic floating mechanism shown in Figure 8;
Figure 10 is a plan view of the magnetic floating mechanism shown in Figures 8 and 9;
Figure 11 is an elevation showing another embodiment of a magnetic floating mechanism;
Figure 12 is an elevation illustrating the operation of the magnetic floating mechanism shown in Figure 11;
Figure 13 is an elevation showing another embodiment of a magnetic floating mechanism;
Figure 14 is an elevation illustrating the operation of another embodiment of a magnetic floating mechanism;
Figure 15 is a general plan view of a further rail type universal parallel ruler device;
Figure 1 6 is an elevation showing the connecting mechanism of the vertical cursor and the head of the ruler device shown in Figure 1 5;;
Figure 1 7 is an elevation illustrating the operation of the connecting mechanism of the vertical cursor and the head shown in Figure 16;
Figure 1 8 is an elevation showing another embodiment of a magnetic floating mechanism;
Figure 19 is a side view showing another embodiment of a magnetic floating mechanism;
Figure 20 is a cross-section of a stationary rail;
Figure 21 is a cross-section showing another embodiment of a stationary rail;
Figure 22 is a general plan view of another rail type universal parallel ruler device;
Figure 23 is a side view showing another embodiment of a magnetic floating mechanism;
Figure 24 is an elevation of the magnetic floating mechanism shown in Figure 23;
Figure 25 is a general plan view of a further rail type universal parallel ruler device;;
Figure 26 is an elevation of a guiding mechanism of the tail portion of a vertical rail;
Figure 27 is a side view of the guiding mechanism shown in Figure 26;
Figures 28a and b are cross-sections of the guiding mechanism shown in Figures 26 and 27;
Figure 29 is an elevation of another guiding mechanism of the tail portion of a vertical rail;
Figure 30 is an elevation illustrating the operation of the guiding mechanism shown in
Figure 29;
Figures 31 and 32 are elevations showing further embodiments of guiding mechanisms of the tail portion of a vertical rail;
Figure 33 is a general plan view of another rail
type universal parallel ruler device;
Figure 34 is a plan view of another guiding
mechanism of the tail portion of a vertical rail;
Figure 35 is a side view of the guiding
mechanism shown in Figure 34;;
Figure 36 is an elevation showing another
embodiment of a guiding mechanism of the tail
portion of a vertical rail;
Figure 37 is an elevation illustrating the
operation of the guiding mechanism shown in
Figure 36;
Figure 38 shows another embodiment of a
guiding mechanism of the tail portion of a vertical
rail; and
Figure 39 illustrates the operation of the guiding mechanism shown in Figure 38.
Figures 1 to 3 show a drawing board 1 supported on a reclining bench (not shown) so that it can be set at a given inclined angle. A horizontal rail 2 is fixed to the drawing board 1 by a vice type fixture, and a horizontal cursor 4 is connected shiftably to the horizontal rail 2 by means of a guide roller 3. A bracket 5 is connected to one end of a vertical rail 6, and its lower end is pivotally supported on the rising portion of the horizontal cursor 4 so as to be rotatable about an axis 7 parallel to the horizontal rail 2. The vertical rail 6 is connected shiftably to a vertical cursor 8, and the vertical cursor is connected to a head 10 by means of a hinge member 9. Straight edges 11 and 12 are detachably mounted on the mounting plate 1 Oa of the head.A magnetic member 13 consisting of a magnet is disposed on the drawing board 1 along the travel path of a tail portion 6a of the vertical rail 6 parallel to the horizontal rail 2. A magnetic member 14 consisting of a magnet is fixed to the tail portion 6a of the vertical rail 6, and the same pole surfaces of the magnet 13 and the magnet 14 are opposed with a proper gap therebetween. The tail portion side of the vertical rail 6 is floated relative to the drawing board 1 by the repulsion magnetic force of the magnets 13, 14.In the foregoing construction, when the handle of the head is grasped by the hand, and the force is applied to the head in a given direction parallel to the surface of the drawing board 1, the horizontal cursor 6 is shifted along the horizontal rail 2, and the vertical rail 6 is shifted along the drawing board 1 while holding right angles to the horizontal rail 2 in the condition where its tail portion side is completely floated relative to the drawing board 1 by the repulsion magnetic force of the magnets 3, 4. By the way, in this embodiment, the tail portion of the vertical rail 6 is energized in the floating direction by the repulsion magnetic force of the magnets 3, 4, but the rail portion may be energized in the floating direction by utilizing the attractive force of the magnets.
By the way, in this embodiment, the tail portion of the vertical rail 6 is energized in the floating direction by the repulsion magnetic force of tie magnets 3, 4, but the attractive force of the magnets may be utilized to energize the tail portion in the floating direction.
Next, another embodiment is described by referring to Fig. 3.
Numeral 15 is an arm mounted on the tail portion 4a of the vertical rail 6, and a shaft 1 6 is fixed to the arm in a direction parallel to the surface of the drawing board 1 and the vertical rail 6 in its longitudinal direction, and an auxiliary roller 1 7 is rotatably mounted on the shaft 1 6 centering around the shaft 1 6. The opposed gap of the surface of the auxiliary roller 17 and the surface of the drawing board 1 is set to be shorter than the opposed gap of the magnet 14 to the magnet 13 which is caused by the repulsion magnetic force.
In the foregoing construction, during the shifting of the vertical rail 6 along the surface of the drawing board 1, the large load is applied to the vertical rail 6 in a direction of the surface of the drawing board 1, and the vertical rail 6 is swung in a descending direction centering around an axis 7, before the magnet 14 comes into contact with the magnet 13, the auxiliary roller 1 7 is in contact with the surface of the drawing board 1. By this operation, the vertical rail 6 becomes in a condition where both end portions are supported by the auxiliary roller 1 7 and the horizontal cursor 4, and the shifting of the vertical rail 6 is continued.When the large load applied to the vertical rail 6 in the descending direction is released, the tail portion side of the vertical rail 6 is elevated again to the drawing board 1 by the repulsion magnetic force of the magnets 13, 14 and the surface of the auxiliary roller 17 is separated from the surface of the drawing board 1. By the way, when the auxiliary roller 1 7 is not present, during the shifting of the vertical rail 6, the magnet 13 is in contact with the magnet 14, the frictional force is derived between the magnets, and this frictional force makes the shifting of the vertical rail 6 heavy. Also, the auxiliary roller 1 7 may be applied to the rail surface parallel to the surface of the drawing board 6.
Next, another embodiment is described.
In Fig. 4 through 7, numeral 22 is a drawing board, and numeral 24 is a horizontal rail fixed to the upper edge portion of the drawing board 22, and the left end of the horizontal rail 24 is projected in a predetermined length in in left direction from the left side surface of the drawing board 22. Numeral 26 is horizontal cursor mounted on the horizontal rail 24 by means of the roller so as to travel, and the upper end of the vertical rail 28 is rotatably and pivotally supported on the horizontal cursor 26 only in the plane perpendicular to the surface of the drawing board 22. Numeral 30 is a vertical cursor mounted on the vertical rail 28 by means of the roller so as to travel, and the head 32 is mounted on the vertical cursor 30 by means of a hinge connecting member. On the mounting plate of the head 32, straight edges 34, 36 are detachably fixed.
Numeral 38 is an arm member fixed to the tail portion of the vertical rail 28 and is projected in a predetermined length toward left side direction in the longitudinal direction of the vertical rail 28. A tail portion 40 is rotatably and pivotally supported on the end portion of the arm member 38.
Numeral 42 is a stationary rail disposed on the lower edge of the drawing board 32 over its entire length, and a magnet 44 is fixed on the upper surface of the stationary rail 42 over its entire length, and the upper surface of the magnet 44 and the upper surface of the drawing board 32 are positioned on the same plane. The tail portion roller 40 is positioned immediately above the upper surface of the magnet 44. Numeral 46 is a magnet fixed to the arm member 38, and the magnet 46 is disposed in parallel to the magnet 44 which is immediately below the tail portion 28a of the vertical rail 28, and a length of the magnet 44 is set to a length identical with a width of the vertical rail 28.The magnets 44, 46 are disposed so that the same magnetic pole surfaces are opposed, and the magnet 46 and the tail portion roller 40 are completely floated relative to the upper surface of the magnet 44 by the repulsion magnetic force of the magnets 44, 46.
In the floating condition, the opposed gap of the tail portion roller 40 and the surface of the magnet 44 is set slightly shorter than the opposed gap of the magnets 44, 46.
Next, an operation of the embodiment is described.
When the head 32 is grasped by the hand, and the pressure in a given direction parallel to the surface of the drawing board 22 is applied, the horizontal cursor 26 is shifted along the horizontal rail 24, and the vertical rail 30 shifted to a given position on the drawing board 22. When the vertical rail 28 is shifted on the drawing board 22 in right and left directions by interlocking with the shifting of the horizontal cursor 26, the tail portion 28a side of the vertical rail 28 is in the completely floated condition by the repulsion magnetic force of the magnets 44, 46.
Accordingly, as contact friction is not derived between the tail portion 28a side of the vertical rail 28 and the surface side of the drawing board 22 so that the vertical rail 28 can be shifted smoothly by light force. When the horizontal cursor 26 is shifted to the left side projecting portion 24a of the horizontal rail 24, the vertical rail 28 is shifted to the outside of the drawing board 22. The magnet 46 is separated from the surface of the upper surface of the magnet 54 as shown in Fig. 7 followed by the shifting in the outside direction of the drawing board 22, and the repulsion magnetic force working between the magnets 44 and 46 is decreased. When the repulsion magnetic force between the magnets 44 and 46 is decreased.The tail portion 28a of the vertical rail 28 is descended in the direction of the surface of the drawing board 22 slightly, and in the condition where the magnet 46 is not in contact with the upper surface of the magnet 44, the surface of the tail portion roller 40 comes into contact with the upper surface of the magnet 44.
When the vertical rail 28 is further shifted in the left direction, the tail portion roller 40 is rotatably travelled in the left direction along the upper surface of the magnet 44, and the magnet 46 is shifted to a position which is completely out of the condition where the magnet 46 is superposed on the magnet 44 completely. A construction is provided so that when a straightedge 36 is positioned at the left end of the drawing board 22, the shifting of the horizontal cursor 26 along the horizontal rail 24 is engaged, and no further shifting in the left direction is possible. As shown in Fig. 4, in the condition where the vertical rail 28 is shifted to a limit position toward the outside of the drawing board 22, a shifting impossible range of the straightedge 36 at the left side of the drawing board 22, namely, the dead space can be completely eliminated.When the head 32 is pressurized in the right direction and the vertical rail 28 is shifted from the outside position of the drawing board 22 to the right direction, as the magnet 46 is superposed on the magnet 44 completely, the repulsion magnetic force between the magnets 44 and 46 is increased, and when the vertical rail 28 is positioned in an almost width range of the drawing board 22, the tail portion roller 40 is floated relative to the upper surface of the magnet 44, namely, the support surface.
As will be apparent from the foregoing description, in the shifting movement of the vertical rail 28 between the inside position of the drawing board 22 and the outside position of the drawing board 22, the grounding and floating operation of the tail portion roller 40 to the upper surface of the magnet 44 are performed extremely smoothly without being accompanied by any kind of shocks.
By the way, in this embodiment, in order that the floating force of the magnet 46 is not worked on the vertical rail 28 in the rotating direction centering around an axis in its longitudinal direction, the position of the magnet 46 is set immediately below the tail portion 28a of the vertical rail. Accordingly, the repulsion magnetic force of the magnets 44, 46 is not worked in either direction, and the eccentric load is not applied to the horizontal cursor 486 connected to the vertical rail 28.
Next, another embodiment is described by referring to Figs. 8 through 10.
Numeral 50 is a rail member disposed over an entire width of the lower edge portion of the drawing board 22, and a roller traveling surface 52 parallel to the surface of the drawing board 22 is formed on the upper surface of the rail member 50. Numeral 54 is a magnet fixed to the rail member 50 and is disposed over an entire length of the rail member 50. At the right end of the roller traveling surface 52, an inclined surface 56 which is gradually lowered toward the right direction is formed. The position of the inclined surface 56 is set to a proper position in the vicinity of the left end of the drawing board 22.
Numeral 58 is a vertical rail, and numeral 60 is an arm member, and numeral 62 is a magnet opposed to the upper surface of the magnet 54, and numeral 64 is a tail portion roller rotatably and pivotally (66) supported on the arm member 60, and is positioned immediately above the roller traveling surface 52.
Next, an operation of this embodiment-is described.
When the vertical rail 58 is positioned in the width of the drawing board 22, the tail portion 58a of the vertical rail 58 and the tail portion roller 64 are completely floated relative to the upper surface of the magnet 54 and the rail member 50 by the repulsion magnetic force of the magnets 54, 62. When the vertical rail 58 approaches the left end of the drawing board 22, the tail portion roller 64 is brought to the inclined surface 56, and, as shown in Fig. 8, it contacts the inclined surface 56.When the vertical rail 58 is further shifted in the left direction, the magnet 62 is separated from the magnet 54, but before the repulsion magnetic force working on the vertical rail 58 is decreased, the tail portion roller 64 rides over the roller traveling surface 52, and the tail portion 58a of the vertical rail 58 which is unable to support by the repulsion magnetic force is supported by the tail portion roller 62 and the roller traveling surface 52.The opposed area of the magnet 62 to the magnet 54 is decreased, and as a result, the repulsion magnetic force is decreased, and before the tail portion 58a of the vertical rail 58 is no longer supported by the repulsion magnetic force, the tail portion roller 54 rides over the roller traveling surface 52 so that as the embodiment shows, with the reduction of the repulsion magnetic force, the opposed gap between the magnets 54 and 62 is not decreased. When the vertical rail 58 is shifted from the outside position of the drawing board 22 to the right direction and the tail portion 58a of the vertical rail 58 is sufficiently floated by the repulsion magnetic force of the magnets 54,62, the tail portion roller 64 is released from the roller traveling surface 52 and is floated relative to the upper surface of the rail member 50.
Next, another embodiment is described by referring to Figs. 11,12.
Numeral 61 is a magnet fixed to the arm member so as to be opposed to the magnet 64, and the position of the magnet 61 is separated to the vertical rail 66 in the right direction in a predetermined length. Numeral 68 is a tail portion roller, and numeral 70 is a rail member.
In the foregoing construction, when a large portion of the magnetic pole surface of the magnet 61 is superposed on the magnet 64, the tail portion roller 68 is floated relative to the upper surface of the rail member 70 by the repulsion magnetic force of the magnets 61, 64.
When the vertical rail 66 is shifted in the left direction from the range of width of the drawing board and the magnetic pole surface of the magnet 61 is released from the magnet 64, the tail portion roller 68 is mounted on the upper surface of the rail member 70, and the tail portion of the vertical rail 66 is supported at the outside position of the drawing board. In the case of this embodiment, since the magnet 61 is fixed to the right end portion of the arm member 62, the contact shifting distance of the tail portion roller 68 to the upper surface of the rail member 70 can be set at a distance shorter than that of the embodiment, and an influence of friction between the rail member 70 and the tail portion roller 68 accompanied by the shifting of the vertical rail 526 outside of the drawing board can be minimized.
By the way, when the vertical rail 72 is positioned in the drawing board 74, the tail portion roller 76 is not completely floated relative to the surface of the drawing board or to the rail surface 78 parallel with the surface of the drawing board, the tail portion roller 76 may be arranged to contact the rail surface 78 lightly by the repulsion magnetic force of the magnets 80, 82 as shown in Fig. 1 3. Also, as shown in Fig. 14, without providing the tail portion roller, the arm member 88 is completely floated relative to the drawing board side by the repulsion magnetic force of the magnets 84, 86, and the complete floating condition may be arranged to maintain even if the vertical rail 90 is positioned at the outside of the drawing board.
Next, another embodiment is described by referring to Figs. 1 5 through 19.
Numeral 92 is a drawing board, and numeral 93 is a horizontal rail, and numeral 94 is a horizontal cursor, and its one end is rotatably and pivotally supported on the horizontal cursor in the plane penpendicular to the surface of the drawing board as shown in Fig. 2. Numeral 95 is a vertical cursor mounted to freely travel on the vertical rail 94 by means of rollers 96, 97, 98, and 99, and a head 101 is connected to the vertical cursor 95 by means of a known head floating mechanism 100. On the mounting plate of the head 101, straightedges 102,103 are detachably fixed.
Numeral 104 is a cover fixed to the tail portion of the vertical rail 94, and a frame 105 is fixed to the cover, and long holes 109, 110 of an adjusting plate 568 are slidably fitted to shaft portions of screws 106,107 that are screwed to thread holes formed on the frame 105. Numeral 111 is a spring. Numeral 112 is a support frame fixed to the adjusting plate 108 by a screw 113 so as to be finely adjustable in a perpendicular direction to the surface of the drawing board 92, and a right end portion, in Fig.18, of a horizontal portion 11 2a of the support frame is projected in right angle direction toward the head mounting side.
Numeral 114 is a magnet consisting of a plurality of flexible magnet rubbers whose cross section is square and is fitted and disposed in a groove formed on the horizontal portion 11 2a, and is disposed in parallel to the horizontal rail 93, and a left end, in Fig. 18, of the magnet 114 is positioned immediately below the left side surface of the magnet 114, and a right end of the magnet 114 is separated in the right direction by a predetermined distance from the right side surface of the vertical rail 94. Numeral 11 5 is a stationary rail fixed to the lower edge of the drawing board 92 parallel to the horizontal rail 93, and a magnet 116 consisting of a plurality of elongate magnet rubbers whose cross section is square is fitted and disposed in a groove formed on the upper surface of the stationary rail.The same pole surfaces of the magnets 114, 11 6 are opposed, and the repulsion magnetic force is worked between the magnets 114, 11 6. A plurality of magnetic pole tracks are formed in parallel on the surface of the magnet 11 6 and mutually different poles are adjacent. A plurality of magnetic pole tracks are similarly formed in parallel on the surface of the magnet 114.
Numeral 11 7 is a safety roller and is rotatably and pivotally supported on the support frame 112, and the surface of the roller 11 7 is slightly floated relative to the surface of the rail 11 5 by the repulsion magnetic force of the magnets 114, 116.
By the way, the adjusting plate 108 is slid along the vertical rail 94 in its longitudinal direction by loosening the screws 106, 107, and the magnetic pole tracks of the magnet 114 can be finely adjusted to the magnetic pole track of the magnet 11 6 accurately at a position where the same poles are opposed. After the fine adjustment, the screws 106,107 are clamped, and the adjusting plate 108 is fixed to the frame 1 05. By the way, when the present invention is put to work, the head floating mechanism 100 should not be limited particuiarly to the structure shown in the drawing.
Next, an operation of the embodiment is described.
When the handle of the head 101 is grasped by the hand, and the force is applied to the handle in a given direction parallel to the surface of the drawing board 92, the horizontal cursor is shifted along the horizontal rail 93, and the vertical cursor 95 is shifted along the vertical rail 94, and the head 101 can be shifted in a desired direction.
When the vertical rail 94 is shifted in the left and right directions in Fig 1 5 along the surface of the drawing board 92, the tail portion 94a of the vertical rail 84 is completely floated relative to the surface of the drawing board 92 by the repulsion magnetic force of the magnets 114, 11 6 and is shifted without undergoing any contact friction.
The head 101 is maintained in the floating condition from the surface of the drawing board 92 by operating the floating mechanism 100 as shown in Fig. 17, the weight of the head 101 is applied on the vertical rail 94, and a rotary moment in clockwise direction in Fig. 1 6 is worked on the vertical rail 94 centering around an axis in its longitudinal direction, and on the other hand, the magnetic force of the magnetic 11 6 is worked in the floating direction of the magnetic 114, and the floating force of the magnet 114 is worked on the vertical rail 94 as a rotary moment in the anticlockwise direction centering around an axis in its longitudinal direction. The rotary moment in the anticlockwise direction is worked in a direction of offsetting the rotary moment in the clockwise direction.When both rotary moments are completely offset, the rotary moment working on the vertical rail 94 becomes zero at the time of floating of the head 101, deriving no torsion force on the roller of the horizontal cursor. As shown in Fig.17, when the head is mounted on the surface of the drawing board 92, the weight of the head is not worked as the rotary force on the vertical rail 94. In this case, the vertical rail 94 is energized in the anticlockwise direction in Fig. 1 8 centering around an axis in its longitudinal direction parallel with the vertical rail 94, and this energizing force is worked as a torsion force on the roller of the horizontal cursor. In this case, the moment of the horizontal cursor along the horizontal rail 93 becomes heavy by the torsion force.
In the case of the embodiment, the eccentric quantity of the magnet 114 to the center of the vertical rail 94 is set so that the magnitude of the rotary force in the anti-clockwise direction in Fig.
18 which works on the vertical rail 94 by the repulsion magnetic force of the magnets 114, 11 6 becomes a strength which is almost 50% of the strength just balanced with the strength of the rotary force working on the vertical rail 94 in the clockwise direction by the weight of the head 101. Of course, an eccentric degree of the center of the repulsion magnetic force by the magnets 114, 11 6 to the center of the vertical rail 94 may be the condition where the vertical rail 94 is completely balanced at the floating time of the head 101.
Furthermore, since the magnetic pole surfaces of the magnets 114, 116 are made as a plurality of rows of parallel magnetic pole tracks, in case an inclination of the drawing board 92 is changed, and even if the load in perpendicular direction to the surface of the drawing board 92 applied to the vertical rail 94 is changed, the change of the floating gap of the magnet 114 to the magnet 11 6 is small and as a result, there is not a big change in paralleiness of the vertical rail 94 to the drawing board 92.
By the way, over an entire length of the stationary rail 115, namely, the guiding member, a space for insertion of a magnetic member is formed and the magnetic member 11 6 may be press fitted to the space portion 11 9. By this construction, the magnetic member 11 6 is protected, and an effect of decorating the stationary rail 11 5 is present.
Next, another embodiment is described by referring to Fig. 21.
Numeral 120 is a concave fitting portion for insertion of magnetic member formed over an entire length of the stationary rail 11 5, and a bandlike iron plate 122 is disposed in the concave fitting portion. The lower surface of the iron plate 122 is in tight contact with the bottom surface of the concave fitting portion 120, and both side portions of the iron plate 122 are in tight contact with the bottom surface of the concave fitting portion 120, and both side portions of the iron plate 122 are in tight contact with the grooves 120a,120b formed over an entire length of the concave fitting portion 120 at the lower end of the side walls forming the concave fitting portion 120.The magnetic member consisting of magnet rubbers is disposed in the concave fitting portion 120, and the lower surface of the magnetic member 116 is attracted to the iron plate 122.
Numeral 121 is a cover plate inserted and disposed over an entire length of the concave fitting portion 120, and its projecting portion 121 a is in contact resiliently with the upper surface of the magnet 11 6, and both side portions are in contact resiliently with the horizontal surfaces 120c, 120d of the concave fitting portion 120. In the foregoing construction, when ducts are adhered to the magnetic member 116, the cover plate 121 is pulled out along the longitudinal direction from the concave fitting portion 120, and the surface of the magnetic member 11 6 can be cleaned.Moreover, as the magnetic member is not exposed to the outside on account of presence of the cover plate 1 21, the surface of the magnetic member 116 can be protected, and moreover decorating effect for the stationary rail 11 5 is derived by the cover plate 121.
Next, another embodiment is described by referring to Figs. 22 through 24.
Numeral 122 is a drawing board, and a horizontal rail 124 is fixed to the upper edge portion of the drawing board 122 by a vice type fixture. Numeral 126 is a horizontal cursor mounted shiftably on the horizontal rail 124, atid one end of the vertical rail 128 is rotatably and pivotally supported on the horizontal cursor centering around an axis parallel to the horizontal rail 124. Numeral 130 is a vertical cursor mounted shiftably on the vertical rail 128, and a head 1 32 is mounted on the vertical cursor by means of a hinge member, and straightedges 134, 136 are detachably fixed to the ruler mounting member of the head 132. Numeral 138 is a bracket fixed to the tail portion of the vertical rail 129, and a screw lever 140 is rotatably engaged at a fixed position to a hole formed on the suspending member 138a.Numeral 146 is a lateral direction adjusting member wherein Vshaped grooves 142, 144 formed on the upper portion is fitted to a projection formed on the bracket 138, and the screw lever 140 is screwed to the thread hole formed on the lateral direction adjusting member. Numeral 148 is a vertical direction adjusting member, and cap screws 150, 1 52 are fixed to the perpendicular plate portion, and the shaft portions of the cap screws 1 50, 1 52 are slidably fitted to long holes 1 54, 1 56 formed on the surface of the drawing board 122 in perpendicular direction to the drawing board 122.
Adjusting screws 1 58, 1 60 (angle setting means) are screwed to the thread holes formed at both end portions of the horizontal portion of the vertical direction adjusting member 148. Numeral 162 is an inclination adjusting member, and a rising portion is formed on an almost center portion of the inclination adjusting member, and the rising portion is mounted on an almost center of a perpendicular plate portion of the vertical adjusting member 148 so that the rising portion is rotatable centering around an axis parallel to the longitudinal direction of the vertical rail 128, and a safety roller 1 66 is rotatably mounted on the shaft 1 64. A groove is formed on the lower surface of the inclination adjusting member 1 62, and a magnet 1 68 consisting of 5 pieces of magnet rubbers whose mutually different poles are adjacent is disposed in the groove in a direction parallel to the horizontal rail 124.
Numeral 170 is a guide rail fixed to the lower edge portion of the drawing plate 1 22 by a vice type fixture 172, and a magnet 1 74 consisting of 5 pieces of magnet rubbers whose poles are mutually different is disposed in the groove formed on the upper surface of the guide rail in a direction parallel to the horizontal rail 1 24. The same pole surfaces of the magnets 168, 1 74 are mutually opposed.
The magnet 1 68 is floated relative to the magnet 1 73 in a predetermined distance by the repulsion magnetic force, and the surface of the safety roller 1 66 is opposed to the upper surface of the guide rail 1 70 at a shorter gap than the distance.
Next, an operation of the embodiment is described.
The screw lever 140 is turned, and the lateral adjusting member 146 is shifted in a longitudinal direction of the vertical rail 128, and the magnet 1 68 is set accurately and directly on the magnet
174.
A primary object of the lateral adjusting member 146 is to obtain a large repulsion magnetic force by causing a plurality of rows of magnetic pole tracks of lower level to coincide with the same pole surface of a plurality of rows of magnetic pole tracks of upper level accurately, but particularly, its use is not limited to only the construction of using a plurality rows of magnetic pole tracks and there is an effect than even in the case of the construction of using the magnets of unipolar construction in the upper and lower levels, sufficient magnetic force can be obtained without loss by the use of the adjusting member
146.
Next, the screws 1 50, 1 52 are loosened, and the vertical adjusting member 148 is moved vertically to the tail portion of the vertical rail 128, and adjustment is applied to set the opposed interval of the tail portion of the vertical rail 128 and the surface of the drawing board to a proper value, and then the screws 1 50, 1 52 are turned in clamping direction, and the vertical adjusting member 148 is fixed to the lateral adjusting member 146.Next, the screws 1 58, 1 60 are rotatably manipulated, and a parallelness of the inclination adjusting member 1 62 to the guide rail
1 70 is adjusted, and the rotary angle of the inclination adjusting member 1 62 centering around the axis is set to a condition where the repulsion magnetic force between the magnets 1 74 and 1 68 is not worked on the vertical rail 1 28 as the rotary force centering around the axis in its longitudinal direction.
In the foregoing condition, when the head 132 is pressed in a given direction parallel to the surface of the drawing board 1 02, the horizontal cursor 1 26 is shifted along the horizontal rail 124, and the tail portion of the vertical rail 128 is travelled along the guide rail 1 30 in the condition where the tail portion is floated relative to the guide rail 1 70 at a predetermined gap. Moreover, the vertical cursor 1 30 is shifted along the vertical rail 128, and the head 132 and straightedges 1 34, 1 36 can be shifted to a given position on the drawing board 122.
By the way, even if the adjusting screws 1 58, 1 60 are not provided, and the inclination adjusting member 1 62 is set in rotatable condition centering around the shaft 164, operation and effect same with the foregoing embodiment can be obtained.Also, the inclination adjusting member 1 62 is made reclinable in a plane including an axis parallel to the longitudinal direction of the guide rail 1 70 which is perpendicular to the surface of the drawing board
1 62, and a parallelness or opposed angle of the inclination adjusting member 1 62 to the guide rail 1 70 is adjusted so that the repulsion magnetic force is not worked on the vertical rail 128 as a rotary force centering around an axis in the longitudinal direction, and then the inclination adjusting member may be fixed to the vertical rail.
By the way, the fixing may be a construction of blocking the shifting of the inclination adjusting
member in the upper direction, and even if it is free in the lower direction, the inclination adjusting member receives the working of the repulsion magnetic force to be energized in the upper direction, and there is no apprehension that the adjusted angle is changed.
The embodiment has the foregoing construction and the magnetic floating force to the tail portion of the vertical rail is not worked on the vertical rail as the rotary force centering around the axis in its longitudinal direction so that the vertical rail can be lightly and smoothly shifted.
Next, another embodiment is described by referring to Figs. 25 through 32.
Numeral 182 is a drawing board fixed to a support frame 184 of the drawing bench, and a horizontal rail 1 86 is fixed by a vice type fixture to the upper edge portion of the drawing board. The left end portion of the horizontal rail 1 86 is projected in a predetermined length in the left side of the drawing board 182. Numeral 188 is a horizontal cursor mounted shiftably on the horizontal rail 1 86, and one end of the vertical rail
190 is rotatably and pivotally supported on the horizontal cursor in a plane perpendicular to the drawing board 1 82 by means of a bracket.
Numeral 1 92 is a stationary rail disposed at the end surface of the lower edge portion of the drawing board 1 82 over an entire length of a width of the drawing board 182, and the stationary rail 1 92 is fixed to the end surface 1 82a of the lower edge of the drawing board 1 82 by the vice type fixture 194. Magnets 196, 1 98 consisting of a pair of magnet rubbers are fixed to the upper surface of the stationary rail 1 92 over an entire length in its longitudinal direction.
Numeral 200 is a slide guide rail made of aluminum, and magnets 202, 204 consisting of a pair of magnet rubbers are fixed to both sides of the lower surface of the slide guide rail over an entire length. The mutually same pole surfaces of the magnets 196, 202, and 198, 204 are opposed, and the slide rail 200 is floated relative to the upper surface of the stationary rail 1 92 at a predetermined gap by the repulsion magnetic force between the magnets.Numeral 206, 208 are a pair of mutually parallel rail surfaces formed in longitudinal direction of the guide rail 200 to prevent traverse vibration of the guide rail 200, and surfaces of two pieces of horizontal rollers 210,212 rotatably and pivotally supported on the upper surface of the stationary rail 192 contact one surface of the rail surfaces, and the surface of the horizontal roller (not shown) rotatably and pivotally supported on the upper surface of the stationary rail 1 92 contacts the other surface 208. Numeral 214 is an engaging portion formed integrally on the left end of the slide guide rail 200, and an inclined surface 21 6 which is sloped upward in left direction is formed on the upper surface of the engaging portion and a steel plate 218 is mounted on the inclined surface 21 6.
Numeral 220 is a vertical safety roller rotatably and pivotally supported on the left end of the stationary rail 192 in the drawing, and the surface of the safety roller 220 is opposed to the lower surface of the guide rail 200 at a predetermined gap, and the gap is set shorter than the opposed gap of the magnets 202, 196. Numeral 222 is a stopper formed on the end portion of the inclined surface 216, and numeral 223 is a lead pencil receiver fixed to the side of the stationary rail 192, and numeral 224 is a bracket fixed to the tail portion of the vertical rail 190, and a tail portion 226 is rotatably and pivotally supported on the bracket, and the tail portion 226 is rotatably mounted on the upper surface of the guide rail 200.Numeral 223 is a vibrating member supported rotatably and pivotally 230 on the bracket 224, and a magnet 232 is fixed to the lower surface of the vibrating member, and the magnet 232 is opposed to the upper surface of the guide rail 200 at a proper gap. The vibrating member 228 is energized in clockwise direction in
Fig. 27 by the tensile resilience of a coil spring 234, and contacts a stopper shaft 236. Numeral 238 is a vertical cursor mounted shiftably on the vertical rail 190, and a head 240 is connected to the vertical cursor 238 by means of a double hinge mechanism, and straightedges 242, 244 are detachably fixed to the ruler mounting plate of the head 240.
Next, an operation of the embodiment is described.
When the head 240 is shifted to the left side on the surface of the drawing board 1 82 by the manual manipulation, the horizontal cursor 1 88 is shifted along the horizontal rail 186, and the tail portion roller 226 is rotatably travelled on the upper surface of the slide guide rail 200.When the head is brought to the vicinity of the left end of the drawing board 182, the magnet 232 is shifted to the upper part of the steel plate 21 8, and the vibrating member 228 is turned in the anticlockwise direction centering around the axis 230 by resisting to the resilience of the coil spring 234 by the attracting force of the magnet 232 to the steel plate 218, and the magnet 232 is attracted to the steel plate 21 8. When the head 240 is further shifted in the left direction and is shifted to the outside of the drawing board 642, the horizontal cursor 1 88 is shifted to the left end projecting portion 1 86a of the horizontal rail 1 86, and the guide rail 200 is shifted by interlocking with the vertical rail 1 90 along the stationary rail 192, and the tail portion roller 226 is supported at the outside position of the drawing board 1 82 by the upper surface of the guide rail 200. When the straightedges 242, 244 are shifted to the left end of the drawing board 182, the shifting in left direction along the horizontal rail 1 86 of the horizontal cursor 1 88 is blocked by a stopper device (not shown).When the head is shifted in right direction of the drawing board 1 82 from the condition, the horizontal cursor 1 88 is shifted in right direction along the horizontal rail 1 86 by interlocking with the shifting of right direction of the vertical rail 190, and the slide guide rail 200 is shifted in right direction, and the engaging portion 214 is abutted to the end surface of the stationary rail 1 92. When the vertical rail 1 90 is further shifted in right direction, the attraction of the magnet 232 and steel plate 218 is released.
When the vertical rail 1 90 is further shifted in right direction, the tail portion roller 226 is rotatably travelled in right direction along the upper surface of the guide rail 200. The shifting of the slide guide rail 200 along the stationary rail
192 is performed in the condition where the slide guide rail 200 is floated relative to the stationary rail 1 92 by the repulsion magnetic force of the magnets 196, 202 and 198, 204, so that the shifting is taken place extremely light and smooth.
When the external stress is applied downwardly to the vertical rail 190, and the large load is applied to the guide rail 200 downwardly from the tail portion roller 226, the guide rail 200 is descended by resisting to the repulsion magnetic force of the magnets 190, 202 and 198,204 and before the magnets 202, 204 contact the magnets 196, 1 98, the lower surface of the guide rail 200 contacts the surface of the safety roller 220, and is engaged by the safety roller 220. As the safety roller, other frictional force reducing member can be used, and also as shown in Fig.
31, the safety roller may not be needed to be installed, and as shown in Fig. 73, vertical guide rollers 248, 250 are rotatably provided at both end portions of the stationary rail 192, and the surfaces of the guide rollers 248,250 are caused
to contact the lower surface of the guide rail 200,
and the contact pressure of the guide rollers 248,
250 with the lower surface of the guide rail 200
may be decreased by the repulsion magnetic
force of the magnets.
Next, another embodiment in which the end
portion of the vertical rail is guided to an extended
position outside of the drawing board smoothly by
utilizing the magnetic force of the magnet is
described by referring to Figs. 33 through 37.
Numeral 261 is a drawing board, and numeral
262 is a horizontal rail fixed to the upper edge
portion of the drawing board 261, and the left end
portion is projected in the extended direction
outside of the drawing board 261. Numeral 263
is a horizontal cursor mounted slidably on the
horizontal rail, and one end of the vertical rail 264
is rotatably and pivotally supported on the
horizontal cursor only in a plane perpendicular to the surface of the drawing board 261. Numeral
265 is a vertical cursor slidably connected to the vertical rail 264, and a head 267 is connected to the vertical cursor by means of a connecting
member 266, and straightedges 268, 269 are detachably fixed to the ruler mounting plate of the
head 267.Numeral 270 is a fixture fixed to the
left end of the lower edge portion of the drawing
board 261, and one end of the stationary rail 271
is fixed to the fixture. Numeral 272 is a fixture fixed to the right end of the lower edge portion of
the drawing board 261, and the other end of the
stationary rail 271 is fixed to the fixture 272.
Numeral 273 is a guide rail, and rail grooves 274,
275 are formed on the inner wall surface of the
guide rail 273, and a plurality of rollers 276
rotatably and pivotally supported on the
stationary rail 731 is rotatably fitted to the rail
grooves 274, 275. A long magnet 277 is fixed to
the upper surface of the guide rail 272. Numeral
278 is a T-shaped groove formed at both side
portions of the vertical rail 264, and a plate nut 279 is disposed slidably in the T-shaped groove 278. Numeral 280 is a frame and through holes 281, 282 are formed at both side portions of the frame 280, and cap screws 283, 284 are slidably fitted to the through holes 281, 282, and cap screws 283, 284 are screwed to the thread holes
of the plate nut 279.When the cap screws are
rotated in clamping direction, the frame 280 is fixed to the tail portion of the verticl rail 264 so that the position can be adjusted. Numeral 285 is a magnet fixed to the horizontal portion of the frame 280, and the magnetic pole surface of the
magnet is opposed to the magnetic pole surface of the magnet 277. The polarity of the magnetic pole is set to N pole. The magnet 277 is set in
such a manner as shown in Fig. 33 that a right 'side in the drawing is an N pole, namely, a
repulsion area, and left side is S pole, namely, an
attracting area with a border 286 set at a position
closer to the left end of the magnet 277. Numeral
287 is a ]-shaped cross section pocket member for accommodating small miscellaneous items,
and its one end portion is fixed to the side of the
lower portion of the drawing board 261.Numeral 288 is a support member, and a tubular portion 289 projected on the support member 288 is fitted to a long through hole 290 formed at an almost middle of the stationary rail 271. The support member 288 is fixed to the stationary rail 271 by a screw screwed to a female thread formed on an inner peripheral surface of the tubular portion 289. By the way, the frame 280 may be fixed directly to the vertical rail 264.
Next, an operation of the embodiment is described.
A mounting position of the frame 280 to the vertical rail 282 is set so that the position is adjusted by manipulating the cap screws 283, 284 and the magnet 285 is positioned immediately above the magnet 267. The magnet 285 is floated relative to the magnet 277 at a predetermined gap by the repulsion magnetic force on the same pole surface of the magnet 277, namely, the repulsion area. In the floating condition, the vertical rail 264 is formed so as to be in parallel to the surface of the drawing board 261. When the handle 267a of the head 267 is grasped by the hand, and the head 267 is shifted in left direction along the surface of the drawing board 261, the horizontal cursor 263 is shifted along the horizontal cursor 262. At this time, the magnet 285 is travelled in the condition where the magnet 285 is floated relative to the repulsion area of the magnet 277.When the horizontal cursor 263 is shifted in a direction of projected extended portion 262a of the left end of the horizontal rail 262, the magnet 285 reaches the border 286 of the magnet 277. In this condition, the repulsion magnetic force and attractive force by N pole and S pole of the magnet 277 are worked simultaneously. In this condition, the horizontal cursor 263 is further shifted in left direction, the guide rail 273 is guided by the roller 276 by interlocking with the vertical rail 264 and is slid in left direction by the mutual attracting action of the N pole of the magnet 285 and the S pole of the magnet 276, and the end portion of the tail portion direction of the vertical rail 264 is supported by the guide rail 273. (Refer to Fig. 37).
Accordingly, the vertical rail 264 is supported by the projected extended portion 262a of the horizontal rail 262 and the guide rail 273 at the outside position of the drawing board 261, and a range where drawing is possible on the drawing board 261 by the straightedges 268, 269 is extended. When the head 267 is positioned to the left end of the drawing board 261, the shifting in the left direction of the guide rail 273 is blocked by a stopper device (not shown) provided separately. Next, when the head 267 is shifted in right direction, the guide rail 273 is shifted in the right direction by interlocking with the vertical rail 264 by the attractive operation of the N pole of the magnet 285 and the S pole of the magnet 277 in the border 286, and the end surface of the guide rail 273 abuts the stopper surface (not shown) of the left end of the stationary rail 271, and the guide rail 273 is returned to the original position. and the shifting in the right direction of the guide rail 273 is blocked. When the head 267 is further shifted in the right direction, the magnet 285 is shifted from the border 286 of the magnet 277 to the right direction in the drawing, and the magnet 285 is floated relative to the magnet 277.
Next, another embodiment is described in Figs.
38, 39.
Numeral 300 is a tail portion roller provided rotatably on the tail portion of the vertical rail 301, and is mounted on the drawing board 302.
Numeral 303 is a guide rail mounted on the drawing board 302 slidably in the right and left directions by the stationary rail (not shown), and an inclined surface 304 is formed on the upper surface of the guide rail 303. A magnet 305 is fixed on the upper surface of the guide rail 303, and the upper surface of the magnet 305 is gradually elevated from the position lower than the surface of the drawing board 302 toward the left direction, and is set at a same height with the surface of the drawing board 302. A border 306 is set on the portion of same height with the surface of the right side in the drawing is set N pole (repulsion area) and the upper surface of the left side is set S pole (attractive area) by the border 306. Numeral 307 is a magnet fixed to the rail portion of the vertical rail 308, and its lower surface is set N pole.The magnet 305 is disposed in a shifting route of the magnet 307.
In the foregoing construction, when the vertical rail 308 is shifted on the drawing board 302, the tail portion roller 300 is rotated by abutting the surface of the drawing board 302. When the vertical rail 301 is shifted in left direction in the drawing, and the magnet 307 is positioned in the upper part of the repulsion area of the magnet 305, the tail portion roller 300 is gradually floated from the surface of the drawing board 302 accompanied by the shifting in the left direction of the vertical rail 301 by the repulsion magnetic force of the magnets 305, 307. When the vertical rail 301 is further shifted in the left direction, and the magnet 307 is positioned immediately above the border 306, the magnet 307 is attracted to the S pole of the magnet 305, and is repulsed by the N pole.When the vertical rail 301 is further shifted in the left direction as shown in Fig. 37, the guide rail 303 is drawn out in the left direction by the action of the attractive force of the magnets 305, 307, and the guide rail 303 supports the tail portion side of the vertical rail 301 at the outside position of the drawing board 302. When the vertical rail 301 is shifted in the right direction, the guide rail 303 is shifted until it reaches the original position in the right direction by interlocking with the vertical rail 301 by the magnetic force of the magnets 305, 307. After the guide rail 303 returns to the original position, and when the vertical rail 301 is shifted in the right direction, the magnet 307 is separated from the border 306 of the magnet 305, and the magnet 307 is repulsed in the floating direction by the repulsion area of the magnet 305, and the tail portion roller 300 approaches the surface of the drawing board 302 gradually accompanied by
the shifting in the right direction of the vertical rail
301, and abuts the surface of the drawing board
302.
Claims (13)
1. A rail type universal parallel ruler device, comprising a drawing board, a horizontal rail
mounted on the drawing board, a horizontal
cursor mounted shiftably on the horizontal rail, a vertical rail connected to the horizontal cursor swivellably in a plane perpendicular to the surface of the drawing board, and a head mounted shiftably on the vertical rail, wherein a magnetic member is disposed along a travel path of a tail portion of the vertical rail, and a further magnetic member is disposed at the side of the tail portion of the vertical rail, and wherein the tail portion side of the vertical rail is energized in a floating direction from the surface of the drawing board or a guiding member parallel thereto by the magnetic force working between both the said magnetic members.
2. A ruler device as claimed in Claim 1, wherein the tail portion of the vertical rail is floated from the surface of the drawing board or the guiding member parallel thereto by the magnetic force working between the said magnetic members, and an auxiliary roller is rotatably and pivotally supported at the tail portion side of the vertical rail, the auxiliary roller being spaced from the surface of the drawing board or the guiding member parallel thereto, and the said spacing being less than the spacing between the magnetic members.
3. A ruler device as claimed in Claim 1, wherein a magnetic member is disposed parallel to the horizontal rail at the lower edge portion of the drawing board, and an indignation adjusting member is connected to the tailportion of the vertical rail, and a further magnetic member is disposed in the inclination adjusting member so that the same pole surfaces of the said magnetic members are opposed, and the tail portion of the vertical rail is caused to float relative to the surface of the drawing board with a predetermined gap by the repulsion magnetic force of both the said magnetic members, and the inclination adjusting member is rotatable relative to the tail portion of the vertical rail in a plane including an axis perpendicular to the surface of the drawing board and parallel to the longitudinal direction of the first-mentioned magnetic member at the side of the drawing board.
4. A ruler device as claimed in Claim 3, wherein the said inclination adjusting member is freely rotatable about a shaft arranged parallel to the longitudinal direction of the vertical rail at the tail portion side of the vertical rail.
5. A ruler device as claimed in Claim 3, further comprising'an angle setting means for limiting the rotation of the said inclinatiori adjusting member to a given angle.
6. A ruler device as claimed in Claim 1, wherein a plurality of magnetic pole tracks are disposed in parallel at the lower edge of the drawing board in a direction parallel to the horizontal rail so that mutually different poles are adjacent, and a plurality of magnetic pole tracks are disposed in parallel so that the same pole surfaces are opposed to those of the magnetic pole tracks.
7. A ruler device as claimed in Claim 1, wherein a magnetic member is disposed parallel to the lower edge of the drawing board in a direction parallel to the horizontal rail, and a further magnetic member is disposed parallel to the tail portion of the vertical rail so as to be opposed to the first-mentioned magnetic member, and the tail portion of the vertical rail is energized in a floating direction relative to the surface of the drawing board by the magnetic force working between the said magnetic members, and fine adjusting means are provided for shifting adjustment of the position relation of the first-mentioned magnetic member and the further magnetic member perpendicular to the longitudinal direction of the magnetic members.
8. A ruler device as claimed in Claim 1, wherein a plurality of magnetic pole tracks are disposed in parallel at the lower edge of the drawing board in a direction parallel to the horizontal rail so that mutually different poles are adjacent, and a plurality of further magnetic pole tracks are disposed in parallel at the tail portion of the vertical rail so as to be opposed to the firstmentioned magnetic pole tracks, and the tail portion of the vertical rail is energized in a floating direction relative to the surface of the drawing board by the repulsion magnetic force of the firstmentioned magnetic pole tracks and the further magnetic pole tracks, and fine adjusting means are provided for shifting adjustment of the position relation of the first-mentioned magnetic pole tracks and the further magnetic pole tracks perpendicular to the longitudinal direction of the magnetic pole tracks.
9. A ruler device as claimed in Claim 1, wherein a magnet is disposed at the lower edge of the drawing board in a direction parallel to the horizontal rail, and a further magnet is disposed at the tail portion of the vertical rail so as to be opposed to the first-mentioned magnet, and the tail portion of the vertical rail is energized in a floating direction relative to the surface of the drawing board by the repulsion magnetic force of the said magnets, and the center of the repulsion magnetic force of the said magnets is made eccentric in the direction of mounting the head to the center of the vertical rail.
10. A ruler device as claimed in Claim 1, wherein one end of the vertical rail is connected shiftably to the horizontal rail which is made shiftable by extending it a predetermined length from one side of the drawing board to the other side, and an arm member is mounted on the tail portion of the vertical rail by extending a predetermined length perpendicular to the head mounting side relative to the longitudinal direction of the vertical rail, means being provided for supporting the arm member when the vertical rail is shifted to the outside of the drawing board.
11. A ruler device as claimed in Claim 1, wherein a space portion for insertion of a magnetic member is formed on a guiding member for guiding the tail portion of the vertical rail along its longitudinal direction, and a long magnetic member is press fitted in the space portion, and a further magnetic member is disposed at the tail portion side of the vertical rail so as to be opposed to the said long magnetic member.
12. A ruler device as claimed in Claim 1, wherein a concave fitting portion for insertion of a magnetic member is formed on the guiding member for guiding the tail portion of the vertical rail along its longitudinal direction, and a long magnetic member is inserted and disposed in the concave fitting portion, and a cover plate is detachably mounted on an opening portion of the concave fitting portion, and a further magnetic member is disposed at the tail portion of the vertical rail so as to be opposed to the said long magnetic member.
13. A rail type universal parallel ruler device, substantially as herein described with reference to, and as shown in, figure 2, figure 3, figures 4 to 7, figures 8 to 10, figures 11 and 12, figures 1 5 to 19, figure 21, figures 22 to 24, figures 25 to 32, figures 33 to 37 or figures 38 and 39 of the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000179A JPS55117695A (en) | 1979-02-21 | 1979-02-21 | Mechanism for reducing moving load of head in rail type universal parallel ruler device* etc* |
| JP54091482A JPS5831320B2 (en) | 1979-07-20 | 1979-07-20 | Balance weight guide device for rail type flexible parallel ruler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2042744A true GB2042744A (en) | 1980-09-24 |
| GB2042744B GB2042744B (en) | 1984-08-30 |
Family
ID=26356896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7943225A Expired GB2042744B (en) | 1979-02-21 | 1979-12-14 | Rail type parallel drafting device |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2952737C2 (en) |
| FR (1) | FR2449540A1 (en) |
| GB (1) | GB2042744B (en) |
| IT (1) | IT1128236B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112914237A (en) * | 2021-02-26 | 2021-06-08 | 刘阳波 | Can resist graphic mapping device that bad weather's land planning used |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5667300A (en) * | 1979-11-06 | 1981-06-06 | Asahi Seimitsu Kk | Supporting device for head section in universal parallel rule |
| DE3100636C2 (en) * | 1981-01-12 | 1983-11-03 | Aristo Graphic Systeme Gmbh & Co Kg, 2000 Hamburg | Automatic drawing system |
| FR2497727A1 (en) * | 1981-01-12 | 1982-07-16 | Aristo Graphic Systeme | AUTOMATIC DRAWING APPARATUS |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1511445A1 (en) * | 1966-05-15 | 1969-04-10 | Kulcke Dipl Ing Otto | Device for securing the parallel guide of a tear bar |
| DE1511421A1 (en) * | 1966-06-20 | 1969-07-10 | Broll Werner | Magnetic device for drawing board and drawing rail |
| DE1919711A1 (en) * | 1969-04-18 | 1970-11-05 | Moeckel Heinrich | Carriage drawing machine |
| DE2551566A1 (en) * | 1975-11-17 | 1977-05-26 | Kuhlmann Kg Franz | CARRIAGE DRAWING MACHINE |
-
1979
- 1979-12-14 GB GB7943225A patent/GB2042744B/en not_active Expired
- 1979-12-29 DE DE2952737A patent/DE2952737C2/en not_active Expired
-
1980
- 1980-01-25 FR FR8001651A patent/FR2449540A1/en active Granted
- 1980-02-21 IT IT67269/80A patent/IT1128236B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112914237A (en) * | 2021-02-26 | 2021-06-08 | 刘阳波 | Can resist graphic mapping device that bad weather's land planning used |
| CN112914237B (en) * | 2021-02-26 | 2022-04-08 | 北京中色测绘院有限公司 | Can resist graphic mapping device that bad weather's land planning used |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2449540A1 (en) | 1980-09-19 |
| DE2952737C2 (en) | 1982-12-02 |
| FR2449540B1 (en) | 1984-10-26 |
| DE2952737A1 (en) | 1980-09-04 |
| IT8067269A0 (en) | 1980-02-21 |
| IT1128236B (en) | 1986-05-28 |
| GB2042744B (en) | 1984-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2286692A1 (en) | Device for height adjustment of a whiteboard | |
| GB2042744A (en) | Rail Type Parallel Drafting Device | |
| US4430805A (en) | Rail type universal parallel ruler device | |
| GB2121194A (en) | Rail type universal parallel ruler device | |
| DE3663905D1 (en) | Tile-cutting device, in particular faience | |
| JPS5855297A (en) | Rule guide apparatus for parallel rule | |
| JPH0430079Y2 (en) | ||
| JPS5855298A (en) | Guide apparatus for balance weight in rail type universal parallel rule, etc. | |
| US2771706A (en) | Drafting board | |
| US4527340A (en) | Holding and guiding device for traveling-carriage drafting machines | |
| JPS5855296A (en) | Guide apparatus for longitudinal rail in rail type universal parallel rule | |
| US4312132A (en) | Rail type universal parallel ruler device | |
| JPH0420635Y2 (en) | ||
| JPH02212199A (en) | Guiding device of longitudinal rail tail part in rail type movable parallel rule | |
| JP2549627Y2 (en) | Elevator roller guide | |
| JPH0114462Y2 (en) | ||
| JPS6232880Y2 (en) | ||
| JPS6121839B2 (en) | ||
| JPH0120156Y2 (en) | ||
| JPS5855299A (en) | Cursor guide apparatus in rail type universal parallel rule, etc. | |
| JPH0432319Y2 (en) | ||
| JPH02160599A (en) | Parallel ruler device | |
| JPS5851840B2 (en) | Vertical rail tail support device for rail type flexible parallel rulers, etc. | |
| JPH03162999A (en) | Crosswise cursor movement load reduction mechanism in rail-type universal parallel rule and the like | |
| KR20220056441A (en) | Driving apparatus for door rail |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931214 |