JP2577257B2 - Drafting leg extension mechanism for 3D oval drawing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing tool which draws an oval in a three-dimensional view and a general drawing on a drawing with a variety of ellipticities.

[Conventional technology]

In general, it is drawn using a ruler (template) stamped and formed to an elliptical shape with a limited ellipticity, but the Japanese Patent Publication No. 62-61438 at the top is a stepless tool within the range of functions provided as an instrument. Japanese Patent Application Laid-Open No. 62-37200 faithfully imitates the difference in the vertical and horizontal widths from the central point of the oval to the entire circumferential line in addition to the above-mentioned functional configuration. Alternatively, the drawing mechanism is newly measured so as to compose the circumferential line, and the elliptical expression formation of a three-dimensional figure oval drawing tool based on the above two inventions is also disclosed in Japanese Patent Application No. 63-117843. The mechanism is a dedicated tool having a mechanism functioning operation for an ellipse of a specific ellipticity drawn on a three-dimensional diagram and drawing.

[Problems to be solved by the invention]

Of the drawings described in the prior art, the drawing leg extending / contracting mechanism described in Japanese Patent Application Laid-Open No. 62-37200 is proportional to the drawing leg 9 in a fan-like reciprocating manner with the (mounting screw 10) as a fulcrum. The starting pin 31) holds the (conduction angle axis 26) and rotates a fixed angle about the (lever axis 21) as a fulcrum, moves the (working surface 24 of the passive lever 25), activates the (passive lever 25), and cooperates. (Rod shaft 34 ・
In the present invention, the lever mechanism functioning such that the connecting rod 33) is moved linearly to convert it into a linear motion and move the telescopic rod 14 up and down inside (drawing leg 9) is used in the present invention. (The telescopic rod 14) is operated to measure and is disposed only on one surface of the elliptical forming disk 47 (elliptical forming disk 47) which is detachable in the elliptical emergence forming mechanism described in Japanese Patent Application No. 63-117843 (guide guidance). Grooves 60 and 61) are additionally provided with a plurality of (guide guide grooves) with different or similar ellipticity on the other surface, and the two surfaces of a single (ellipse forming board) are selected as required and flipped over. Is to be attached to the main body.

[Means for solving the problem]

First, the outline will be described with reference to FIG. A drawing leg 10 which is connected to a rotary knob 5 at the top of the vertical center shaft 1 with a mounting screw 11 and is formed as a fulcrum in a bifurcated manner with the vertical center line 1 to open and close in a fan shape.
And a drawing leg extension mechanism of the telescopic rod 15, a copying interlocking rod 37 and an elliptical forming plate 38 engaged with the mechanism at an intermediate position.
The two mechanisms of the elliptical appearance forming mechanism of the movable round shaft 30 provided with are arranged. More specifically, referring to FIG. 2 and FIG.
Is located at the center of the ellipse during drafting, and its upper end 2 has a step-like large diameter, a receiving hole 3 is provided on the top surface, and a sphere 4 projects partially and is inserted so as to be freely rotatable. The rotary knob 5 is provided with a blind hole-shaped shaft hole at the center, and a fool hole 7 penetrates a predetermined position of the center of the longitudinal axis of both side surfaces 6. When the fan-shaped starting teeth 8 are formed and arranged around the axis of the hole 7 and inserted into the upper end portion 2, the stupid hole 7 is formed.
The center and the vertical center of the vertical axis 1 coincide with each other and fit into the fastener 9 in which screw holes are fitted in advance, and then the fastener 9 through the fool hole 7 with the mounting screw 11 holding the drafting leg 10. By screwing, the rotary knob 5 includes the upper end 2 and freely rotates about the core axis. The drafting leg 10 is a groove shape formed by bending the vertically long left and right side edges 12 at a right angle, the conduction long hole 13 penetrates along the center of the longitudinal axis, the lower end surface is cut off in a long hole shape, and the opposite sides 12 are parallel from the upper side. A mounting hole is provided at the center position on both sides so as to form a protruding mounting surface 14, and two mounting screws 11 penetrate from both sides through the mounting hole and the fool hole 7 to stop the rotary knob 5 in the blind hole-shaped shaft hole. It is screw-connected to the metal fitting 9 and is formed in a bifurcated manner with the vertical shaft 1. Then, the mounting screw 11 is widened and fixed to the maximum width with the mounting screw 11 as a fulcrum. In addition, the telescopic rods 15 are arranged in an overlapping manner below the inside of the drawing leg 10 and are movably pressed and held by a pressing plate 16 having an upper end screwed. Next, the telescopic rod 15 is formed so as to be movable fit with the inner surfaces of the lower ends of the both side edges 12, a connection hole 17 is provided at the upper end, and the lower end is formed into the core receiver 18, and the drawing core 19 is attached. At this time, as shown in FIG.
The perpendicular distance between the center and the end of the center needle 20 disposed at the lowermost end of the vertical center axis 1 and the center of the mounting screw 11 and the end of the drawing core 19 are formed into a right-angled triangle, and the end of the drawing core 19 is positioned horizontally parallel to the end of the center needle 20. The telescopic rod 15 is arranged so as to move vertically up and down along the inner side surface of the drawing leg 10. Also, the core receiver 18 is formed such that the drawing core 19 to be held is inclined in the outward direction of the right triangle with its tip as a fulcrum, and then on both the left and right sides of the mounting surface 14 of the drawing leg 10 as shown in the figure. A shaft hole 21 is provided, and an engaging tooth 22 meshing with the starting tooth 8 in the form of a differential gear is mounted. That is, a shaft hole 21 is provided at a position symmetrical to both sides of the mounting surface 14 at a fixed axial distance from the center of the fool hole 7 of the rotary knob 5 (the central axis of the fan-shaped starting tooth 8).
And a conversion lever 24 that holds the engagement teeth 22 is attached to the coaxial hole 21. The conversion lever 24 has a pair of right and left two connecting rods 23 each having an engaging tooth 22 fixedly integrated at one end inside thereof, and the other end of the connecting rod 23 at a predetermined distance from the axial center of the engaging tooth 22 on both outer surfaces. The rotary knob 5 is inserted between the facing surfaces of the mounting surface 14 of the drafting leg 10 by inserting the connecting pin 25 into the shaft.
The engaging rod 22 is movably attached to the engaging tooth 21 and the engaging tooth 22 is meshed with the starting tooth 8. A connecting rod 26 is connected to the connecting pin 25. The connecting rod 26 is formed so as to overlap with the inside of both sides 12 of the drawing leg 10, and a long hole 27 which is slightly larger than the conduction long hole 13 and the center of the longitudinal axis is penetrated on the plane, and the upper and lower side edges are formed. A mounting hole is provided on the upper end face to protrude and a connection hole 17 is provided on the lower end face, and the upper end face mounting hole is fitted into the connecting pin 25 of the connecting rod 23 of the conversion lever 24 to be movably connected. The buffer plate 28 is connected to the surface connection hole 17. As shown in the figure, the buffer plate 28 is formed by connecting two strip-shaped leaf springs, which are slightly curved and have elasticity as shown in the figure, facing each other with fastening studs 29, and connection holes 17 are provided at four places at both upper and lower ends. The connection hole 17 is inserted between the insides of the connection holes 17 on the lower end surface of the connection rod 26 and is movably connected with the pin shaft, and the bottom connection hole 17 is inserted and matched between the insides of the top connection holes 17 of the telescopic rod 15. By connecting the conversion lever 24 and the connecting rod 26 movably with the pin shaft, the connecting lever 26 and the telescopic rod 15 are further connected to each other.

 Next, the ellipse appearance forming mechanism will be described in detail.

As shown in FIGS. 2 and 3, the movable round shaft 30, which is inserted at an intermediate position of the vertical center axis 1 and is movable up and down around the center axis, is divided into an upper half part at its tip and divided into elastic pieces 31. Pipe thread 32
A bearing surface with a stepped surface whose diameter is expanded below the main shaft core 33 with
34, the lower half part has a screw groove 35
Each of them is molded with a tapered shaft portion 36 provided with a, and an interlocking rod 37 is copied to the main shaft core 33, and an elliptical forming plate 38 is mounted on the tapered shaft portion 36. The scanning connection rod 37 is formed into a hemispherical shape at the tip end surface at the center of the longitudinal axis, and is provided with a connection screw shaft 40 in the sliding receiver 39.The upper surface in the hole is formed into a thread groove at a set position described later along the center of the longitudinal axis. Drill a conical taper hole 41, insert a copying pin 42, insert a holding spring 43, cover it with a small screw, cover the spherical projection of the copying pin 42,
37, a long shaft hole 44 penetrates the main body at a standard set distance position separated from the center of the copying pin 42 as shown in the figure, and the main shaft core 33 has a long hole shaft hole 44. The copying interlocking rod 37 is movably inserted into the bearing seat 34, and the above-mentioned drafting leg 10 is inserted into the connection screw shaft 40 into the connecting screw shaft 40.The sliding receiving member 39 and the buffer spring 45 are superposed. Then, the locking nut 46 is finely movably tightened with the locking nut 46, and the connecting rod 37 is connected and linked to the drawing leg 10, and the locking nut 47 is screwed into the pipe screw 32, and then the fixing nut 48 is loosely screwed in.
The elliptical plate 38 has an elliptical outer shape and a taper shaft at the center.
A taper shaft hole 49 that fits with 36 penetrates, but a taper is formed on the object from both front and back surfaces and a specific ellipticity ellipse is formed on the upper surface at an inner position along the outer peripheral edge as shown in FIG. Every time)
The guide guide groove 50 set at
The guide guide grooves 51 each having a reduced scale are formed and formed on the other surface, and are set on the other surface to an ellipticity elliptical shape (an example of 45 degrees) having a different ellipticity from the guide guide grooves 50 and 51 as shown in FIG. A plurality of guide guide grooves 52 and 53 formed by molding are arranged and inserted into the above-mentioned tapered shaft portion 36 with the tapered shaft hole 49, and the guide guide grooves 50 are formed on the spherical projections of the copying pin 42.
An arbitrary portion in the groove is fitted and engaged, and is overlapped with the lower surface side of the copying interlocking rod 37, and the tapered shaft hole 49 is formed in the tapered shaft portion 36.
Oval forming machine with retaining nut 54 screwed into thread groove 35
38 is fixed tightly and detachably and reversibly.
In the above-mentioned standard setting distance position, that is, at the longest long hole shaft hole 44 pitch distance center position in the interval between the center of the copying pin 42 and the long hole shaft hole 44, the long hole shaft hole 44 is disposed on the basis of the same position center. , The pitching pin 42 center and sliding receiver 39
・ The setting position of the connection screw shaft 40 also changes. Above slotted hole 44
The pitch distance is the difference between the center radius of the guide guide grooves 50 and 52 longitudinal axis and the center radius of the guide guide groove 51 horizontal axis.
The central radii of the vertical axes of 50 and 52 are set to be equal to or less than the interval distance between the center of the copying pin 42 and the longest center of the pitch distance of the elongated hole 44. Further, the outer shape of the ellipse forming plate 38 is made the same elliptical shape as the guide guiding groove 52. Next, the auxiliary leg that is integrated with the central needle 20
Reference numeral 55 denotes a screw thread at the lower end of the vertical shaft 1 which is vertically movable and is inserted together with a tightening nut.

(Operation)

If the fixing nut 48 of the pipe screw 32 of the moving round shaft 30 found in the vertical shaft 1 is further screwed into the vertical shaft 1, the elastic piece 31 is bent.
The moving round shaft 30 is tightly fixed to the shaft surface. Next, the vertical center axis 1 is set upright, the elliptical center position is set on the plane with the center needle 20, the vertical position is maintained by the auxiliary leg 55, and the turning knob 5 is turned to connect with the mounting screw 11. The scanning interlocking rod 37 that operates and associates with the drawing leg 10 operates with the main shaft core 33 as the center axis in the elongated hole 44, so that the copying pin 42 of the scanning interlocking rod 37 is attached and fixed to the taper shaft 36. Elliptical forming plate 38 Guide guide groove 50 Guide groove is selected over the entire circumference to guide the movement follower interlocking rod 37 to the elliptical orbital movement, and is connected by the slide receiver 39, connection screw shaft 40, buffer spring 45, and lock nut 46. The associated drafting legs 10 are simultaneously interlocked and move in a fan-shaped ellipse with the mounting screw 11 as a fulcrum, and draw an ellipse on a plane with the drafting core 19. That is, FIGS. 2 and 4 show that the distance between the vertical center axis 1 and the copying pin 42 is extended and
37 is linked to the drawing leg 10 and the elliptical forming plate 38 is guided to the guide groove 50 at the center of the vertical axis. In FIGS. 6 and 7, the distance is also reduced to the center of the horizontal axis. In this state, the robot moves in these positions to perform an orbiting motion. Further, the drawing leg 10 and the copying interlocking rod 37 move while adjusting the difference in expansion and contraction in the distance between the vertical mandrel 1 and the copying pin 42 due to the clearance between the elongated hole 44 and the spindle 33. Further, the tapered shaft portion 36 is used to make the elliptical forming plate 38 act on the other surface of the guide guiding grooves 50 and 51.
The elliptical forming plate 38 is pulled out from the
The guide guide groove 52 or an arbitrary portion in the groove 53 is fitted and engaged with the spherical projection of the copying pin 42, and then mounted and fixed, so as to function as described above. In view of the above, the difference in the orthogonal distance from the center of the mounting screw 11 to the entire elliptical circumferential line on the plane during the above-described action movement is described by the drawing leg 10.
・ Drawing core 19 while automatically correcting by the expansion and contraction action of expansion rod 15
To make complete contact on a plane. That is, as shown in FIGS. 2 and 4, when the drafting leg 10 and the scanning linkage rod 37 move from the widened position to the vertical center axis 1 shown in FIGS. When the engaging teeth 22 of the conversion lever 24 make a differential rotational movement with the starting teeth 8 with the shaft hole 21 as a bearing, the connecting rod 23 is converted into an upward linear movement and connected by the connecting pin 25 and the connecting hole 17. 26. When the buffer plate 28 pulls up the telescopic rod 15 and thus reaches the contracted position, if it is reversed and separated from near the vertical center axis 1 side, the engaging teeth 22 that are in differential engagement with the starting teeth 8 rotate in the reverse direction and move upward. The connecting rod 23 at the position performs the lowering operation and is connected to the connecting rod 26.
The buffer plate 28 and the telescopic rod 15 are pushed out toward the distal end of the drawing leg 10 and return to the positions shown in FIGS. Straight, conversion lever 24
The degree of movement of the connecting rod 23 and the engagement tooth 22 is determined by differential rotation of the starting tooth 8 and the engagement tooth 22 because the center of the engagement tooth 22 moves together with the fan-shaped movement of the drawing leg 10. And the distance between the center of the engagement tooth 22 and the center of the connecting rod 25 and the center of the connecting rod 23 when the conversion lever 24 is installed on the drafting leg 10. If the vertical travel distance of the center position of the connecting rod 23 and the telescopic stroke distance of the telescopic rod 15 is set to be equal to the base mounting direction, the telescopic rod is proportional to the degree of fan-shaped widening operation of the drawing leg 10. 15 stretches and shortens in proportion to the reduction. Next, the cushioning plate 28 has a slight irregularity in the horizontal parallel position between the tip of the vertical center axis 1 center needle 20 and the tip of the drawing core 19 due to its elastic action or the drawing leg 10, telescopic rod 15, conversion lever 24.
The error operation caused by the tolerance between the constituent members described above is supplementarily absorbed. The auxiliary leg 55 integrated with the center needle 20 has a vertical center axis 1 for correcting an extreme height difference between the tip of the drawing core 19 for drawing and the tip of the center needle 20 which are different in type and shape attached to the center support 18.
The auxiliary leg 55 connected to the threaded portion is rotated up and down to adjust the horizontal position. Furthermore, the elliptical forming plate 38 guides the guiding guide grooves 50, 51, 52 and 53 and interlocks 37 the copying pin 42
The moving round shaft 30 is moved up and down on one axis of the vertical center axis, and the center of the mounting screw 11 and the copying interlocking rod 37 are drawn. By changing the distance between the positions connected to the unit 10, the copy proportion can be changed.

〔Example〕

As shown in FIGS. 1 and 2, the drawing leg 10 and the telescopic rod 15 having the conversion lever 24 mounted thereon are connected to the rotary knob 5 at the top of the vertical shaft 1 with the mounting screw 11 and the vertical shaft 1 is in the middle. The moving round shaft 30 and the scanning interlocking rod 37 inserted in the position are connected to the drafting leg 10 with the sliding receiver 39, the connection screw shaft 40, the buffer spring 45, and the lock nut 46, and the scanning interlocking rod 37 and the scanning pin 42 are moved. The operation procedure of the drafting instrument for copying and drawing the ellipse of the elliptical forming board 38 guide guiding groove 50 on a plane is as follows. First, the ellipticity to be drawn and the conformity of the elliptical forming board 38 guiding guide groove 50 are confirmed. In order to set the size, as shown in FIG. 2 and FIG.
And the center of the longitudinal axis of the elliptical forming plate 38 is aligned, the fixing nut 48 is loosened, the moving round shaft 30 is made movable, and the vertical center shaft 1 is set up on the measuring rule with the center needle 20, and at this time, the tip of the center needle 20 and the drawing are drawn. core
Also check the horizontal parallel position of the 19 tip and if it is not aligned, adjust it by moving the auxiliary leg 55 up and down, then move the round shaft 30 up and down to open and close the drawing leg 10 and open the drawing needle 10 tip and the drawing core 19 tip The center radius of the elliptical vertical axis (elliptical long axis radius) is set at the interval distance, the fixing nut 48 is tightened, the movable shaft 30 is firmly fixed to the vertical center shaft 1, and the round shaft 30 is tightly fixed. If the elliptical shape for drawing 20 is drawn, the center of the longitudinal axis of the copying interlocking rod 37 and the elliptical forming plate 38 are made coincident, the vertical axis 1 is held upright and immovable, and the rotary knob 5 is gripped and turned to draw the drawing leg 10.・ Extension rod 15 ・
The drawing core 19 rotates around the ellipse and draws the ellipse accurately on the drawing. 6 and 7, if the drawing leg 10 and the telescopic rod 15 are at the reduction limit position and the same reduced-size elliptical shape is still required, as shown in FIGS. 8 and 9. Copying linkage rod 37
The copying pin 42 is moved from the guide guide groove 50 to the groove 51, and the drawing operation is performed in the above-described procedure. Further, when necessary, the guide guide grooves 52 and 53 are used by extracting the ellipse forming plate 38 and reversing the mounting.
Straight, drawing core 19 of different type and shape on core holder 18 of telescopic rod 15
When a drawing core for black ink or the like is attached, the tip of the center needle 20 and the tip of the drawing core 19 are turned to the horizontal parallel position by turning the center needle 20 and the auxiliary leg 55.

〔The invention's effect〕

The drawing core 19 of the drawing leg 10 and the telescopic rod 15 according to the present invention also makes complete contact on a plane around the entire ellipse.
No. 0 indicates that when the (drafting leg 9) reciprocates in a fan shape with the (mounting screw 10) as a fulcrum, the (starting pin 31) moves in an arcuate motion centered on the (mounting screw 10) (the operating surface 24 of the passive lever 25). (Passive lever 25) also acts to sink once with a fixed angle rotation about the (fulcrum shaft 21) as a fulcrum, and is linked to the linear motion of the linked (rod shaft 34 / rod 33) and linked (stretching / contracting). The rod 14) needs an adjusting mechanism so as to be able to regulate on a plane in order to make a wavy movement on the plane. In the present invention, the engaging teeth 22 meshing with the starting teeth 8 are differentially rotated to connect the connecting rod 23 with the connecting pin 25. Performs vertical arc motion in the vertical direction, but the fluctuation difference also decreases, and the deflection caused by the arc motion is
The connecting rod 26 is connected to the cushioning plate 28 and the connecting hole 17 is used as a fulcrum to eliminate absorption by horizontal swing and to transmit only vertical movement to the telescopic rod 15 so that the telescopic rod 15 and the drawing core 19 are parallel to the plane The adjustment mechanism was simplified along with the exercise.

[Brief description of the drawings]

FIG. 1 is a perspective view of the entire vertical section of a main part of a three-dimensional figure oval drawing instrument, FIG. 2 is a front view of the same, FIG. 3 is a vertical section of a main part of a drawing leg extending / contracting mechanism and an elliptical appearance forming mechanism according to the present invention. FIG. 4 is an AA line of FIG. 2 and FIG. 5 is a BB line of FIG.
6, FIG. 6 is an operational front view relating to FIG. 2, FIG. 7 is an arrow cut-away plan view taken along line CC of FIG. 6, and FIG. 8 is FIG. 9 is a sectional view taken along the line D-D in FIG. DESCRIPTION OF SYMBOLS 1 ... Vertical center axis 5 ... Rotating knob 6 ... Both side surfaces 8 ... Starting teeth 10 ... Drawing legs 11 ... Mounting screws 12 ... Both side edges 13 ... Conducting long hole 14 ... Mounting surface 15 … Telescopic rod 16… Holding plate 17… Connection hole 19… Drawing core 20… Center needle 21… Shaft hole 22… Engaging teeth 23… Connecting rod 24… Conversion lever 25… Connection pin 26 Connection rod 28 Shock plate 30 Moving round shaft 32 Pipe screw 33 Main shaft core 36 Tapered shaft 37 Copying interlocking rod 38 Oval forming plate 39 Sliding receiver 40 Connection screw shaft 41 Taper hole 42 Copying pin 44… Elongated shaft hole 45… Buffer spring 46… Lock nut 47… Lock nut 48… Fixing nut 49… Tapered shaft hole 50 …… Guiding guide groove 51 …… Guiding guide groove 52 …… Guiding guide groove 53 …… Guiding guide groove 54 …… Retaining nut 55 …… Auxiliary leg 56 …… Ink for drawing

Claims (1)

(57) [Claims] An idiot hole (7) is provided at a predetermined position on both side surfaces (6) of the rotary knob (5), and one side edge of the rotary knob (5) parallel to the center axis of the idiot hole (7). Stupid hole (7) at lower edge
While forming a fan-shaped activation tooth (8) about the axis of
The mounting surface (14) of the drawing leg (10), which is screwed to the fitting (9) inserted into the central hole of the rotary knob (5) of the rotary knob (5) by the mounting screw (11) through the fool hole (7). ) Axial holes (21) are arranged at left and right target positions at a fixed center distance from the center of the fool holes (7) on both left and right sides, and a pair of left and right separate rods (23) A conversion lever having an engagement tooth (22) fixedly integrated with one end inside and a connection pin (25) fixed to a target position at a predetermined distance from the axial center of the engagement tooth (22) on both outer sides of the other end. Insert the side of the engaging tooth (22) of (24) so as to sandwich the rotary knob (5) between the inside facing surfaces of the mounting surface (14) of the drafting leg (10), and insert the shaft hole ( Attach movably to 21) and engage the engaging tooth (22) with the actuating tooth (8). Connect the connecting pin (25) movably with the upper end surface mounting hole of the connecting rod (26). Connection of lower end surface of the connecting rod (26) Insert the upper end connection hole (17) of the buffer plate (28) between the inner surfaces of the hole (17), connect it movably with the pin shaft, and then connect the lower end connection hole (17) of the buffer plate (28) in advance with the drawing leg. The conversion lever (24) is inserted between the inside of the upper connection hole (17) of the telescopic rod (15) held by the holding plate (16) screwed to the lower inner surface of (10) and movably connected by a pin shaft (24) And a drawing leg expansion / contraction mechanism of a three-dimensional figure oval drawing tool in which a connecting rod (26) and a telescopic rod (15) are connected and connected.