JPH03187799A - Locking device for moving element of drafting machine - Google Patents

Abstract

PURPOSE:To simply optimally, and quantitatively regulate operation before assembling by providing means for controlling the rotating range of driven operating means, and means for regulating the coupling position with a driving means for thus controlled operating means. CONSTITUTION:A thinner regulating plate 44 than the thickness of a brake plate 13 is brought into contact with a locking surface 14a, the end 21 of a connecting member 15 is brought into contact with it, and a screw 46 is engaged with a threaded hole 45. The end of the screw 46 is engaged with the upper surface 22a of a supporting wall 22. Operating means 24 is rotated at a fulcrum 23 as a center, the end 24a is connected to the connecting piece 16 of the member 15 to control the rotating range of the means 24. A clamping screw 29 is inserted into a long hole 47 formed in the mounting piece 27 of a rhombic member 25 to secure the end 24b of the means 24 to the piece 27. The hole 47 is so set as to be disposed at the driving stroke end of driving means by regulating means for regulating the connecting position of the means 24 with the driving means when one end of the means 24 is connected to the member 15.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is directed to moving each moving body provided in a drawing machine for determining the scale position, determining the base line position, and adjusting the angle of the scale to a desired position or The present invention relates to a lock device that can lock at a desired angle and quantitatively adjust the clearance between lock and release.

(Prior art and its problems) Generally, when drawing with a drafting machine, the scale is attached after determining the base line of the protractor on the head according to the drawing on the drawing board, and then the scale is attached vertically and horizontally on the head. Move freely,
This requires the work of drawing lines at a predetermined position and at a predetermined scale angle. Therefore, in order to adjust the angle by moving the head in the vertical and horizontal directions and rotating the protractor and scale, a moving body is installed on the X-rail, Y-rail, and the head for installation. In addition, a locking device is provided to brake and lock these moving bodies.

There are the following types of locking devices for movable bodies in such drafting machines.

■Baseline brake device (Example: Japanese Patent Application Laid-Open No. 55-47000) This is done by locking and fixing the protractor to the supporting board of the head at the desired rotation angle to mount the scale according to the drawing placed on the drawing board. It is something.

(2) Angle brake device (Example: Utility Model Publication No. 56-31426) This is a device that locks and fixes the main shaft side to the support substrate or the protractor at an arbitrary rotation angle with respect to the support substrate as described above.

■Cursor brake device (Example: Utility Model Publication No. 54-6520) This device locks and fixes a cursor slidably attached to the X and Y rails provided on the drawing board at any position on the rails.

Incidentally, recently, in order to make drafting work more efficient, a device has been considered in which the locking device is operated by electrical power without relying on a manual worker. For example, a brake means is driven by a solenoid (example: Japanese Patent Laid-Open No. 61-222
797, Utility Model Application No. 63-161567) and one using displacement of a piezoelectric element (eg, Utility Model Application No. 83495-1982).

As mentioned above, the locking device itself is based on the frictional force between the movable body and the fixed member based on the operating force of the manual lever and the driving force of the solenoid or piezoelectric element.
In order to adjust the lock release, after actually assembling the locking device to the drawing machine, you must either operate the control lever, or drive the solenoid or piezoelectric element to the locked state (when the moving object is completely fixed). The amount was adjusted based on the standard.

As described above, adjusting the lock device while relying on human intuition while actually operating the lock device is inefficient and extremely troublesome.

(Objective of the Invention) The present invention was developed in view of the above circumstances, and by adopting a completely different mechanism from the conventional locking device, assembly can be performed quantitatively and easily, and optimal operation can be easily achieved. The object is to provide a locking device for a drafting machine that can be adjusted.

(Means for Achieving the Object) As a means for achieving the above-mentioned object, the locking device for a drawing machine according to the present invention provides rotational movement or linear motion with respect to one structural member constituting the drawing machine. a movable body that moves, a brake plate is fixed to one of the component member or the movable body, and a brake plate is provided on the other of the component member or the movable body to open and close in the direction of movement of the movable body, facing the surface of the brake plate. Providing a pair of engaging members that are movable and have a line connecting the center of rotation and the tip formed in a V-shape or an inverted V-shape,
The movable body is configured such that the engaging member is biased in the closing or opening direction by a biasing means, and its tip engages or separates from the surface of the brake plate in response to opening and closing of the engaging member. The locking device is arranged such that one end of the member provided with the engaging member is rotatable around an intermediate portion so as to be able to engage with the engaging member, the other end is connected to the driving means, and the other end is connected to the driving means. An actuating means for rotating the engaging member away from the surface of the brake plate, a regulating means for regulating a rotational range of the operating means driven by the driving means, and an operating means regulated by the regulating means. and adjusting means for adjusting the connection position with the driving means.

When the scale is attached to the component as a support substrate of the head section or a member fixed to the support substrate, the movable body may be attached as a protractor on the head section.

When the constituent member is a protractor on the head portion, the movable body may be a member to which the scale is attached.

When the component is an X rail provided on a drawing board,
The moving body may be a Y-rail cursor that moves along the X-rail.

When the component is a Y rail provided on a drawing board,
The movable body may move along a Y rail, and the attachment may be a cursor on a head portion.

The actuating means may be operated manually or by an electromagnetic solenoid or a piezoelectric element in combination with a magnification mechanism.

(Operations and Effects of the Invention) According to the above configuration, when the engaging member is made free and the tip of the engaging member is engaged with the surface of the brake plate by the urging means, both engaging members are mutually moved against the brake plate. It hits you diagonally from the opposite side. As long as the parts maintain sufficient rigidity, the center of rotation of the engaging member remains unchanged, and the planar state of the brake plate is maintained, the brake plate and the engaging member cannot move relative to each other. Although the initial load for engaging the engaging member with the brake plate is small due to the biasing means, the locking force of the movable body is extremely large.

As described above, the locking device operates by rotating the engaging member against the spring bias from a state in which the engaging member is engaged with the brake plate due to the spring bias (locked state) during driving. Either the engagement member is released (unlocked) by causing the engagement member to move away from the engagement member, or vice versa. By separating the driving relationship between the actuating means and the engaging member, which are operatively connected to the driving means, and leaving the engaging member in a free state, the tip of the engaging member engages with the brake plate, so that it is independent of the driving load of the driving means. A strong fixing force can be obtained, and the lock is completely released when the tip of the engaging member is separated from the brake plate by the actuating means. In other words, if the tip of the engaging member engages or separates from the brake plate even slightly, the brake plate becomes locked or unlocked.

Next, the engaging member, the actuating means, the regulating means, and the adjusting means are arranged in one block, and the brake plate receiver has an adjusting plate slightly thinner (or thicker) than the brake plate on the surface of the brake plate. The actuating means is set in place of the actuating means, and the actuating means is regulated by the regulating means so that the actuating means is at the drive stroke end of the actuating means when one end of the actuating means engages with the engaging member, and furthermore, the actuating means and the driving means are connected. When the above block is actually assembled on the drawing board by adjusting and fixing the position with the adjusting means, if the actual brake plate is thicker than the adjusting plate, there is no brake between the engaging member and the actuating means. There is a gap from the plate surface that corresponds to the difference in thickness between the adjustment plate and the brake plate.
In addition, the brake plate and the engaging member are in an engaged state, and the locking device can be changed from the locked state to the unlocked state by driving the driving means. In addition, when the actual brake plate is thinner than the adjustment plate, one end of the actuating means is engaged with the engagement member, so the tip of the engagement member is moved from the plate surface of the brake plate to the adjustment plate and brake plate. They are separated from each other with an interval equal to the difference in thickness.

Therefore, it is possible to adapt the locking device to the locking state from the unlocked state by driving the driving means.

In this way, the optimal relative positional relationship between the engaging member and the brake plate, which is necessary for optimal operation when assembling the brake plate, is determined without looking at the direct correspondence between the engaging member and the brake plate. Even if the adjustment plate is used, the optimal state of engagement between the engaging member and the brake plate (when the adjustment plate is thin) or the optimal state of separation between the two (when the adjustment plate is thick) can be simulated. This allows easy and quantitative adjustment.

Further, by adjusting the positioning of the initial reference position of the actuating means, dimensional errors in brake-related members, etc. can be absorbed at the end, so that strict component accuracy is not required.

(Example) The present invention will be explained below with reference to the drawings.

[Configuration and operation of locking device] Figure 1 shows an overview of a drawing machine (universal parallel ruler).
A drawing board 1, an X rail 2 fixed to the upper edge of the drawing board 1, and a Y connected to a cursor 3 that moves along the X rail 2.
A rail 4 and a cursor 5 that moves along the Y rail 4
The attachment provided at the tip of the support substrate 6 connected via a hinge to the support substrate 6 is composed of a head portion 7 and a scale 8 attached to the head portion 7.

As shown in FIGS. 2 and 3, the head section 7 is rotatably supported on the support substrate 6 via the main shaft 9a. Further, a sub-shaft body 9b provided coaxially with the main shaft body 9a
A scale mounting member 10 having a scale 8 is fixed thereto, and a protractor 11 indicating the degree of rotation of the scale 8 is rotatably supported. Note that a vernier 12 is fixed to the member 10 for attaching the scale. Further, the protractor plate 11 and the scale mounting member 10 are provided so as to rotate independently of each other.

By the way, in order to fix the head part 7 in a predetermined position when drafting, the cursor 3 is braked and locked in a predetermined position with respect to the X rail 2 and the cursor 5 with respect to the Y rail 4, respectively. Furthermore, when drawing a line, it is first necessary to lock the rotational movement of the protractor 11 in order to determine the base line of the drawing, and also to lock the scale 8 at an arbitrary angle with respect to the protractor 11. Therefore, a locking device is provided for each.

Among the above locking devices, the most frequently used locking device is a locking device that brakes and locks the rotational movement of the member (moving body) 10 when attaching the scale to the protractor 11 fixed by base line determination. It is structured as follows.

First, a thin disk-shaped brake plate 13 with a planar surface that protrudes in the outer radial direction is fixed to the outer edge of the protractor 11.

On the other hand, as shown in FIGS. 2 and 3, the scale is attached by a bracket 14 protruding from the member 10, and a pair of engagement plates at the tip of the bracket 14 facing the brake plate 13. A mating member 15 is pivotally supported. That is, the distal end side of the bracket 14 is bent so as to approach the brake plate 13 side, and then further extends to a position outside the brake plate 13. This tip 14a is formed as a locking surface, and above the locking surface 14a is a front wall 18a having a notch 17 in the center and side walls 18b on both sides thereof.
A block-shaped holding frame 18 is formed, and a scale is mounted on the front wall 18a facing the surface of the brake plate 13 so as to be rotatable in opening and closing with respect to the moving direction of the member 10. A pair of letter-shaped engaging members 15 are supported by a support shaft 20 .

As shown in FIGS. 3 and 4, both engaging members 15 are formed in an inverted V-shape with a line p connecting the support shaft 20 and the tip 21 opening inward, and the lower surfaces of both sides are diagonally inward. Engagement pieces 16 are formed on the inside of the upper part and are bent toward the other engagement members 15, and biasing means using a compression spring 19 is disposed between both engagement members 15. .

As a result, both engaging members 15 are urged in the direction in which the tips 21 open, and the tips 21 of both engaging members 15 are engaged with the surface of the brake plate 13.

The bent end portion 14a of the bracket 14 faces the engaging member 15 on the opposite side with the self-braking plate 13 interposed therebetween. The surface of the bent tip 14a of the bracket 14 is in contact with the plate surface of the brake plate 13.

Further, as shown in FIGS. 2 and 3, a metal support wall 22 is disposed between both side walls 18b of the holding frame 18, and is fixed to the bracket 14. One end 24 a of the upper part of the support wall 22 is connected to the lower part of the engagement piece 16 of the engagement member 15 through the notch groove 17 in the center of the front wall 18 a of the holding frame 18 via the fulcrum part (hinge part) 23 . At the same time, the other end 24b is provided with a rod-shaped actuating means 24 in the shape of a lever, extending to the opposite side. Although the actuating means 24 is formed integrally with the fulcrum portion 23 and the support wall 22, it may be supported by a support shaft.
4 has a screw hole 46 formed closer to the end portion 24a than the fulcrum portion 23. Then, the screw 45 screwed into the screw hole 46
The tip of the support wall 22 is formed to engage with the upper surface of the support wall 22 .

The one end 24a of the actuating means 24 moves upward and the engaging piece 1
6 is pushed up, the engaging member 15 rotates in the closing direction against the elasticity of the urging means 19, and the tip 21 of the engaging member 15 separates from the surface of the brake plate 13. On the other hand, when the one end 24a of the actuating means 24 moves downward, the engaging member 15 rotates in the opening direction due to the elasticity of the urging means 19, and the tip 21 of the engaging member 15 again moves toward the surface of the brake plate 13. engage with.

Next, drive control of the actuation means 24 is carried out by a drive means that combines a piezoelectric element and an enlargement mechanism shown in FIG.

That is, the expansion mechanism is constituted by a horizontally long rhombic member 25 behind the support wall 22, and the piezoelectric element 26 is formed by the rhombic member 25.
is embedded inside.

Further, mounting pieces 27 and 28 are formed at the upper and lower ends of the diamond-shaped member 25, the lower end mounting piece 28 is fixed to the support wall 22, and the upper end mounting piece 27 is attached to the end of the actuating means 24. It is fixed with screws 29 (see Figure 2). In addition,
For attaching the upper end of the diamond-shaped member 25, a long hole 47 is formed in the piece 27 in the vertical direction.

With the above configuration, when voltage is applied to the piezoelectric element 26 by operating the lock release switch (not shown), the piezoelectric element 2
6 has the property of elongating and displacing, so the rhombic member 25 extends in the lateral direction and contracts in the vertical direction. Therefore, when the actuating means 24 is mounted around the fulcrum part 23, the end on the side where the piece 27 is fixed is pulled down, whereas the end on the opposite side is driven upward and pushes up the engagement piece 16. , the engaging member 15 rotates in the closing direction against the elasticity of the biasing means 19, and its tip separates from the brake plate 13 (see FIG. 4).

The displacement due to the expansion of the piezoelectric element 26 is magnified in the vertical direction by the diamond-shaped member 25, and the displacement in the vertical direction is further magnified in accordance with the ratio of the distance between the fulcrum part 23 of the actuating means 24 and each end. Although the elongation of the piezoelectric element 26 is minute, this 2
The two enlarging mechanisms can sufficiently rotate the engaging member 15 in the closing direction. Furthermore, since the piezoelectric element 26 has excellent responsiveness, the engaging member 15 is instantaneously driven.

Next, by operating the lock release switch, the piezoelectric element 26
When the voltage application to the engagement member 15 is released, the displacement also returns to its original state, so the actuation means 24 rotates in the opposite direction again, and the engagement member 15
The pressing force on the engagement piece 16 is also released, and the engagement member 15
is rotated in the opening direction by the biasing means 19, and its tip engages with the brake plate 13.

As described above, before the lock release switch is operated (before driving), the engaging member 15 is urged in the opening direction by the urging means 19, and the tip 21 of the engaging member machining 5 is ,
It engages with the surface of the brake plate 13 and presses the brake plate 13 against the locking surface 14a at the tip of the bracket 14.

The rigidity of the parts is maintained sufficiently so that the center of rotation of the engaging member 15 is 0.
The brake plate 13 and the engaging member 15 cannot move relative to each other as long as the brake plate 13 remains unchanged and the flat state of the brake plate 13 is maintained.

That is, since the length (OA) from the rotation center 0 to the tip 21 of the engagement member 15 is formed to be slightly longer than the vertical height (OB) from the rotation center O to the surface of the brake plate 13, When the mating member 15 engages with the surface of the brake plate 13, a certain vertical load determined by the biasing means 19 and the angle α is applied to the brake disc 13, causing a gap between the tip of the engaging member 15 and the locking surface 14a. The brake plate 13 is now in a state of being clamped. Due to this vertical load, a certain frictional force determined by the materials of these materials acts between the tip of the engagement member 15 and the brake plate 13 at point A where the tip of the engagement member 15 and the brake plate 13 engage. ing.

Here, when attaching the scale and trying to rotate the member 10 in the direction a, the tip 21 of one of the engaging members 15a is
Due to the initial friction caused by the above-mentioned frictional force, the brake plate 13
However, if the force in the above direction on the tip 21 at point A is F, the vertical load of the tip on the brake $2ii13 is OB/AB times F, and the brake plate 13 is amplified by the amount determined by the angle α, and the clamping force between the engaging member 15 and the locking surface 14a also increases, so that the engaging member 15a
The brake plate 13 neither slides nor rides on the brake plate 13, remains stationary without moving from point A, and is completely locked.

On the other hand, when attaching the scale, if the member 10 is to be moved in the b direction, the braking force exerted by the other engaging member 15b will not be able to rotate in the b direction for the same reason as mentioned above. When attaching the scale, the member 10 is fixed at a predetermined angle without shifting.

In this way, the locking force increases or decreases in proportion to the force that rotates the brake plate 13, so with this mechanism it is theoretically possible to obtain an infinite braking force just by applying a small initial load to the ball.

In addition, since the spring must be moved in the compression direction when releasing the lock, it is preferable to set the angle α to be small (5° to 30°) in order to keep the spring constant relatively small.

As described above, the initial load for engaging the engaging member 15 with the brake plate 13 is due to the biasing means 19 and is small; however, the tip of the engaging member 15 is
3, when the engaging member 15 tries to rotate regardless of the magnitude of the driving load, a braking force determined by the angle α is generated, which becomes a fixing force and can be firmly locked.

On the other hand, when the lock release switch is turned on during driving and a voltage is applied to the piezoelectric element 26, the piezoelectric element 26 is extended and displaced, and the above-mentioned two displacement amplifying mechanisms work to raise the above-mentioned one end 24a of the actuating means 24. and push up the engagement piece 16. As shown in FIG. 3, the engaging member 15 rotates in the closing direction against the elasticity of the biasing means 19, and the distal end 21 of the engaging member 15 rotates in the closing direction.
is separated from the surface of the brake plate 13. If the tip 21 of the engaging member 15 separates from the brake plate 13 even slightly,
The lock is instantly and completely released, and the scale is attached to member 1.
0 can be moved freely.

Conversely, when the lock release switch is turned off, the tip 21 of the engaging member 15 engages with the brake plate 13 again due to the elasticity of the urging means 19, resulting in a locked state.

In addition, if a lock release switch is provided at an appropriate position on the head section 7, after turning on the switch and releasing the lock, the scale 8 can be rotated freely to determine the drawing line angle.
The scale 8 is locked by turning off the lock release switch, and the angle is determined. In this way, the drawing angle can be controlled by pressing and releasing the lock release switch, and since this operation does not require any great force, the degree of fatigue caused by repeated operations is very small.

Further, among the opening and closing rotations of the engagement member 15, the rotation in the opening direction is performed by the biasing means 19, and the actuation means 24 is involved only in driving the engagement member 15 in the closing direction. Therefore, not only the mechanism of the actuating means 24 and its drive control means becomes simple, but also the operation adjustment described later becomes easy.

By the way, contrary to the above example, it is also possible to lock the movement of the movable body when it is being driven, and to release the lock when it is not being driven.

For this purpose, when not driven, the actuating means 2 is required as shown in FIG.
The end 24a on the side of the application point of 4 is connected to the engagement piece 16 of the engagement member 15.
The engaging member 15 is brought into a closed state (unlocked state) by engaging and pressing the lower surface, and when driven, the end portion 24a is moved downward as shown by the dotted line in the same figure to release the engagement, and at the same time The engaging member 15 may be configured to be rotated in the opening direction (locked state) by the elasticity of the biasing means 19 (compression spring).

[Adjustment of the locking device] As described above, the locking device operates from the state in which the engaging member 15 is engaged with the brake plate 13 due to the spring biasing (locked), to the state in which the engaging member 15 is engaged with the brake plate 13 by the spring biasing, and then the locking device is operated against the spring biasing. and the engaging member 15
to separate the engaging member 15 (unlock)
or vice versa. Then, the engagement state between the actuation means 24 and the engagement member 15 is separated, the engagement member 15 is made into a free state, and the tip of the engagement member 15 engages with the brake plate 13, so that the drive load of the drive means is A reliable fixing force can be obtained regardless of the engagement member 15.
When the tip of the brake plate 13 separates from the brake plate 13, the lock is completely released. In other words, if the tip of the engaging member 15 engages or separates from the brake plate 13 even slightly,
Becomes locked or unlocked.

Next, it is necessary to optimally adjust the operating states of the engaging member 15 and the brake plate 13 during locking and unlocking. For example, when rotating the engaging member 15 to separate its tips from the brake plate 13, the engaging member 15
If the clearance between the tip of the brake plate 13 and the brake plate 13 is too large, a time lag will occur during driving, resulting in a lack of quick response. If it is too small, there is a risk that malfunction will occur when dust adheres to the brake plate 13 or when the surface of the brake plate 13 becomes uneven. However, if the clearance is adjusted by batch quantity, the accuracy will vary from drawing machine to drawing machine. This problem can be solved by adjusting in advance the initial state in which the actuating means 24 driven by the driving means engages the engaging member 15.

Next, a specific adjustment method will be explained.

(2) In the case of locking when not driven and releasing when driven First, as shown in FIG. 7, the lower end of the diamond-shaped member 25 of the enlarging mechanism is attached in advance by fixing the piece 28 and the support wall 22 with screws 41.

As shown in FIG. 8(a), an adjustment plate 44 slightly thinner than the thickness of the brake plate 13 is placed on the lock surface 14a.
is applied, and the tip 21 of the engaging member 15 is brought into contact thereon. In this state, a screw 46 is screwed into the screw hole 45 formed in the actuating means 24 shown in FIG. The tip of the screw 46 engages with the upper surface 22a of the support wall 22. When screwed in further, the screw 46 cannot be lowered any further, so the actuation means 24 rotates around the fulcrum 23, and the tip 24a on the side of the action point eventually engages with the engagement piece 16 of the engagement member 15. . At this time, screwing in the screw 46 is stopped. This restricts the rotation range of the actuating means 24.

Next, to attach the upper end of the diamond-shaped member 25 to the end 24b on the power point side of the actuating means 24, a fixing screw 29 is inserted through a long hole 47 formed in the vertical direction in the piece 27. The portion 24b and the piece 27 are attached to the upper portion of the diamond-shaped member 25 by fixing them together with a fixing screw 29. The elongated hole 47 is an adjusting means for adjusting the connection position between the actuating means 24 and the driving means, so that when one end of the actuating means 24 engages with the engagement member 15, it is at the end of the driving stroke of the driving means. is set to
Adjustment work is completed. After adjustment, the adjustment screw 29 is removed.

After the above-mentioned work, when the locking device is actually assembled on the drawing board, the actual brake plate 13 is thicker than the adjustment plate 44, so the engagement member 15 and There is a gap between the tip 24a of the means 24 and the plate surface of the brake plate 13 corresponding to the thickness difference t1 between the adjustment plate 44 and the brake plate 13, and the brake plate 13 and the engaging member 15 are not engaged with each other. It will be in a state where it matches. Therefore, when the locking device is driven by the driving means, it can be changed from the locked state to the unlocked state.

■When driven - locked, when not driven - released In this case,
As shown in FIG. 9(a), an adjustment plate 44 that is slightly thicker than the brake plate 13 is placed on the locking surface 14a, and the tip 21 of the engagement member 15 is brought into contact thereon. In this state, the screw 46 is screwed into the screw hole 45 formed in the actuating means 24 shown in FIG. 15 engaging pieces 16. At this time screw 46
Stop screwing in. Furthermore, the other end 2 of the actuating means 24
4b may be connected to the drive stroke end of the drive means via an adjustment means. After adjustment, the screw 46 is removed.

After the above operations, when the locking device is assembled to the drawing board, the brake plate 13 is thinner than the adjustment plate 44, and one end of the actuating means 24 is engaged with the engaging member 15, so as shown in FIG. As shown in b), the tip of the engaging member 15 is connected to the brake plate 13.
The difference in thickness between the adjustment plate 44 and the brake plate 13 from the plate surface t
They are now separated from each other with an interval of only 2 minutes. Therefore, when the locking device is driven by the driving means, one end 24a of the actuating means 24 is lowered, and the tip 21 of the engaging member 15 is engaged with the brake plate 13 by the urging means 19, changing from the unlocked state to the locked state. .

As described above, when assembling the brake plate 13, the engaging member 15 and the brake plate 13 are assembled together, which is necessary for optimal operation at the time.
The optimum relative positional relationship between the engaging member 15 and the brake plate 13 can be determined by using the adjusting plate 44 without looking at the direct correspondence between the engaging member 15 and the brake plate 13. combined state (when the adjusting plate is thin) or the optimal separation state of both (when the adjusting plate is thin)
When the adjustment plate is thick), the adjustment can be easily and quantitatively performed.

In addition, by adjusting the position of the initial reference position of the actuating means 24, dimensional errors in brake-related members and the like can be absorbed at the end, so that strict component accuracy is not required.

(Other Examples) Next, other embodiments are possible in implementing the locking device.

[Drive Means' and Actuation Means] For example, as shown in FIG.
One end 24a is arranged under the engagement piece 16 of the engagement member 15, and the other end 24b is arranged on the operating rod 35 of the electromagnetic solenoid 34.
The actuating means 2 may be connected to the spring 36 so as to be biased in opposite directions. In this case, when not driven, the actuating means 2
4 is biased by the force of the spring 36 so that its tip is slightly separated from the lower part of the engagement piece 16, and the engagement member 15 is in an open state (locked state).

On the other hand, when the electromagnetic solenoid 34 is energized during driving, the rod 35 moves down and the tip 24a moves up, so the engagement piece 16 of the engagement member 15 is pushed up and the engagement member 15 is closed. direction and the lock is released.

In this case as well, opening and closing of the engaging member 15 can be electrically controlled.

In addition, in order to adjust the clearance between locking and unlocking in this case, as shown in the figure, an adjusting plate 44 that is slightly thinner than the plate thickness of the brake plate 13 is placed on the locking surface 14a, and the engaging member is placed on the adjusting plate 44. 15, and screw the screw 46 through the screw hole 45 formed in the actuating means 24 so that the tip 24a of the screw 46 touches the engaging piece 16 of the engaging member 15.
When engaged, the other end 24b of the actuating means 24 may be connected and fixed to the rod end 35 of the electromagnetic solenoid 34.

Further, as shown in FIGS. 11 and 4, as an operating means, a U-shaped operating lever 30 is provided on both side walls of the support wall 22 (or holding frame) so as to be swingable in the vertical direction by a support shaft 33b. The engaging portion 31 protruding from the operating lever 30 is configured to open and close the engaging member 15 by slidingly contacting the inclined surfaces 32a formed at the lower portions of both sides of the engaging member 15. A combination is also possible.

In order to adjust the clearance in this case, the lock surface 14
Place the adjustment plate 44 on top a, bring the tip 21 of the engagement member 15 into contact with it, and screw the screw 46 into the support wall 22 through the screw hole 45 formed in the actuating lever 30 to tighten its engagement. The other end 30b of the actuating lever 30 may be connected and fixed to the rod end 35 of the electromagnetic solenoid 34 when the mating portion 31 is engaged with the inclined surfaces 32a formed on both lower sides of the engaging member 15.

Note that the actuation lever 30 can also be used as the actuation means 24 when the movement of the movable body is locked during driving and unlocked when not driven. In this case, as shown in FIG. 6, an inclined surface 38 is formed on the upper part of the locking jaw 37 provided outside the engagement member 15 and below the support shaft 20, or
Alternatively, an inclined surface 39 is formed inside the engaging member 15 and above the support shaft 20, and the actuating piece 31 of the actuating lever is moved vertically relative to either of the inclined surfaces 38, 39, and the actuating lever is actuated. What is necessary is just to configure so that the actuating piece 31 is brought into sliding contact with the said inclined surface 38 or 39 by driving a lever, and the engaging member 15 is rotated in the opening direction.

In this case, when the piezoelectric element 26 is used as a drive control means for driving and controlling the operation of the actuation means 24, the first
As shown in FIG. 2, an expanding mechanism may be adopted in which the expanding member 25 expands and expands in the vertical direction when energized. Similarly, when using an electromagnetic solenoid, the position of the tip of the actuating means, the electromagnetic solenoid at the other end, and the spring may be reversed according to the example shown in FIG.

[The engaging members 15 of the pair of engaging members 15 may be configured so that the tips thereof are in the shape of a square. In this case, if the settings are made as shown in FIG. 13 (al), the engaging member 15 will be in a locked state when it is biased in the closing direction, and will rotate in the opening direction as shown in FIG. 13 (b). When the movable body 10 is not driven, the engaging member 15 locks the movable body 10, and when the lock is released by driving the actuating means 24, the actuating means of the engaging member 15 operates. 24 and the drive control means for controlling the opening/closing drive may be configured as follows.

That is, while the pair of engaging members 15 is biased in the closing direction by the biasing means 19 made of a tension spring to keep the brake plate 13 in the locked state, the tip 24a of the rod-shaped actuating means (24) is The engaging piece 15 is arranged so as to be engageable on the upper surface of the engaging piece 16, and the engaging member 15 is rotated in the opening direction by actuating the actuating means 24 using a combination of the piezoelectric element and the expansion mechanism described above or a solenoid. The lock can be released by moving the tip of the brake plate away from the surface of the brake plate 13.

Further, when employing the actuation lever (30) as the actuation means, as shown in FIGS. 13(a) and (b), the engaging member 15
The outer upper part (above the support shaft 20 position) 32C of the actuating means (24) is formed as an inclined surface inclined in an inverted V-shape.
The tip of the actuating piece 31 may be brought into sliding contact with the inclined surface 32c in the direction of the arrow. Similarly, the engaging member 15
An inverted V-shaped inclined surface 32d may be secured to the inner lower part of the actuating member 31, and the tip of the actuating piece 31 may be brought into sliding contact with the inclined surface 32d in the direction of the arrow.

Contrary to the above, when driving, the moving body (the scale is attached to member 1)
0) and release the lock when not driven, as shown in FIG. When the engagement member 15 is in the open state (unlocked state) by engaging and pressing the upper surface of the engagement member 16, the end portion 24a is pressed when driven.
It may be configured such that the engaging member 15 is moved upward to release the engagement, and at the same time the engaging member 15 is rotated in the closing direction by the elasticity of the urging means 19 (locked state).

When a piezoelectric element is used to drive the actuating means 24 in this case, it is sufficient to employ an expanding mechanism in which the diamond-shaped member 25 expands and expands in the vertical direction when energized, as shown in FIG. Similarly, when using an electromagnetic solenoid, the position of the tip of the actuating means 24, the electromagnetic solenoid at the other end, and the spring may be reversed according to the example shown in FIG.

[Biasing Means] When rotating the pair of engaging members 15 so that each tip thereof comes into contact with the surface of the brake plate 13, it is usually sufficient to use a spring with a small elasticity as the biasing means. By selecting materials for the brake plate 13 and the engaging member 15 that have a large coefficient of friction with each other, or by forming the abutting portions of both to have a rough surface, the tip 21 of the engaging member 15 can be moved by gravity. If sufficient frictional force can be obtained by simply abutting the brake plate 13 naturally, the biasing means may be gravity.

[Restricting Means and Adjusting Means] In short, the restricting means for restricting the rotation range of the actuating means 24 is not limited to a screw shape as long as it can finely adjust the movement of the actuating means. For example, it may have a wedge shape.

Similarly, the adjustment means for adjusting the connection position with the drive means is not limited to the above example. For example, the long hole 45 can be
4 may be formed at the end 24b of the diamond-shaped member 2.
The lower end attachment of 5 may be formed between the piece 28 and a support wall or the like.

[How the locking device is attached] Contrary to the above example, the scale may be attached by providing the brake plate 13 on the member 10 and the engaging member 15 on the protractor 11.

Further, a locking device for locking the rotational movement of the protractor board 11 in order to determine the baseline of the drawing is, for example, a locking device for the support substrate 6.
Alternatively, the above-mentioned pair of engaging members 15, urging means, actuating means 24, etc. are provided on the outer edge of the main shaft body 9a fixed thereto via a bracket, and the tip thereof is connected to a protractor (as in the above example).
The brake plate 13 may be configured to engage with and separate from the brake plate 13 fixed to a moving body.

Similarly, the cursor 3 supporting the Y rail 4 with respect to the X rail 2, and the cursor 5 supporting the head part 7 mounted with the scale with respect to the Y rail 4, are braked at predetermined positions when moving in a straight line. The locking device for locking is to fix the brake plate 13 along the Y rail 4 or the X rail 2, and to lock the cursor 3 of these rails.
Alternatively, a bracket (not shown) protruding from 5 is provided with the above-mentioned pair of engaging members 15, biasing means, actuating means 24, etc., and when the engaging members 15 are opened and closed, the tips of the engaging members 15 touch the brake plate 13. It may be formed to engage or separate from the surface.

In the case of normal line drawing work, the locking device or scale is attached to the Y rail 4 or Sometimes lock,
It is preferable to control the lock so that it is unlocked during driving. In this way, by selecting one depending on whether the brake is applied for a long time or the brake is released for a long time, power consumption can be reduced.

These locking devices may be adjusted in the same manner as described above.

[Brief explanation of drawings]

Fig. 1 is an overall schematic diagram of a locking device of a drawing machine according to the present invention, Fig. 2 is an enlarged sectional view of the drawing machine taken along the line X-X, and Fig. 3
The figure is a perspective view of the locking device, FIG. 4 is a front view of the locking device, FIG. 5 is an explanatory diagram of the combination of a piezoelectric element and an enlargement mechanism, FIG. 6 is an explanatory diagram of another lock mode, and FIG. 7 is a lock 8(a) (b) and 9(a) (bl are explanatory views of the adjustment mode of the lock engaging member, respectively, and FIG. 10 is an illustration of the adjustment mode of the electromagnetic solenoid and the operating means. FIG. 11 is an explanatory diagram of a combination of the actuating lever and electromagnetic solenoid. FIG. 12 is an explanatory diagram of another enlargement mechanism. FIG. 13 is an explanatory diagram of yet another mounting manner of the engaging member and the actuating lever. 1. Drawing board, 2.
... Scale, 11 ... Protractor, 15 ... Engagement member, 19 ... urging means, 13 ... Brake plate, 24
... Actuation means, 26... Piezoelectric element, 34... Electromagnetic solenoid Fig. 6 Fig. 7! 16 Fig. Fig. 7 ( ) <a> Fig. 10 Fig. 2 Fig. 1 Fig. 2 Figure 3 3 1 1 so per day

Claims (7)

[Claims] (1) A drawing machine includes one component and a movable body that rotates or moves in a straight line with respect to the component, a brake plate is fixed to one of the component or the movable body, and a brake plate is fixed to one of the component or the movable body. On the other side of the movable body, there is a pair that faces the surface of the brake plate and can be rotated to open and close in the moving direction of the movable body, and a line connecting the center of rotation and the tip is formed in a V-shape or an inverted V-shape. An engaging member is provided, and the engaging member is biased in the closing or opening direction by a biasing means, and the tip of the engaging member engages or separates from the surface of the brake plate in response to opening and closing of the engaging member. A locking device for a movable body formed to rotate around an intermediate portion so that one end thereof can be engaged with the engaging member, the other end is connected to the driving means, and the locking device is configured to rotate around an intermediate portion so as to be engageable with the engaging member. an actuating means for rotating the member away from the surface of the brake plate; a regulating means for regulating the rotational range of the actuating means driven by the driving means; and an actuating means regulated by the regulating means. A locking device for a movable body in a drafting machine, comprising: an adjusting means for adjusting a connection position with the driving means. (2) A locking device for a movable body in a drawing machine according to claim 1, wherein the component is disposed on a mounting head of a scale, and the movable body is a protractor of the mounting head. (3) Claim (1) wherein the component is a protractor of the mounting head, and the movable body is a scale mounting member.
) A locking device for a movable body in the drawing machine described in ). (4) A locking device for a movable body in a drawing machine according to claim (1), wherein the component is an X rail provided on a drawing board, and the movable body is a cursor on a Y rail that moves along the X rail. . (5) The movable body in the drawing machine according to claim (1), wherein the component is a Y rail provided on a drawing board, and the movable body is a cursor of the mounting head that moves along the Y rail. locking device. (6) A locking device for a movable body in a drawing machine according to any one of claims (1) to (3), wherein the actuating means is driven by an electromagnetic solenoid. (7) A locking device for a movable body in a drafting machine according to any one of claims (1) to (3), wherein the actuating means is driven by a piezoelectric element combined with an enlarging mechanism.