JPS6114441B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a scriber holder for a coordinate measuring machine.

To describe the present invention more specifically, the coordinate measuring machine has a vertical scale shaft 3 vertically fixed on a base 2 movable along the upper surface of a surface plate 1 as shown in FIG. The shaft 3 supports a scale shaft holder 4 that slides vertically along the vertical scale shaft 3, and the scale shaft holder 4 has a horizontal scale shaft 5 extending perpendicularly to the vertical scale shaft 3. A scriber holder 6 is fixed to one end of the horizontal scale shaft 5, and a scribing needle 7 pointing in the horizontal direction and a scribing needle 7 pointing in the front-rear or vertical direction are fixed to one end of the horizontal scale shaft 5. A scribing needle 8 is supported in the scriber holder 6, and the direction of the scribing needle 8 can be changed to either the front-rear horizontal direction or the vertical direction.

However, in the scriber holder of the conventional structure, play occurs due to wear of the scriber holder components due to repeated operations of changing the direction of the scribing needle 8, and due to long-term use. There was a problem in that it was difficult to accurately adjust the orientation of the scribing needle 8 held in the scriber holder, and as a result, accurate three-dimensional measurement could not be performed.

The present invention has been made in view of the above, and provides a scriber holder that allows the direction of the scribing needle to be changed in the horizontal and vertical directions (90 degrees) with a single touch and more accurately. be.

The present invention will be explained in detail below based on embodiments shown in the drawings.

Reference numeral 9 denotes a fixed shaft fixed to the horizontal scale shaft 5 via a sleeve 10, and a collar 11 is formed integrally with the fixed shaft 9 in the middle of the outer periphery thereof. A rotary plate 12 is rotatably supported at the other end of the fixed shaft 9 via a bearing 13, and this rotary plate 12 is supported by a screw ring 14 screwed onto the other end of the fixed shaft 9. It is closely held on the side of the collar 11. Four recesses 15 are formed at equal intervals in the circumferential direction (90 degree intervals) on the joint surface of the rotary plate 12 with the collar 11, and in each of the recesses 15, there are four recesses 15 in the radial direction of the rotary plate 12. slit 16 extending to
A piece 17 having a shape is buried therein and fixed in the recess 15 by a screw 18. Reference numeral 19 denotes a pair of arms protruding from the side surface opposite to the recess 15 of the rotary plate 12, and this arm 19 holds a scribing needle holder 20 whose side surface is approximately U-shaped. The above-mentioned scribing needle 7 is attached to the scribing needle holder 20 with a tightening screw 21. Reference numeral 22 denotes another scribing stylus holder provided on the circumferential side of the rotary plate 12, and the scribing stylus 8 is attached to this scribing stylus holder 22 with a tightening screw 23. Reference numeral 24 denotes a pin support tube provided on the flange 11, and inside the pin support tube 24 there is a positioning pin 26 having a conical tip and a flange 25 in the middle. is inserted through the positioning pin 26, and the conical end of the positioning pin 26 is inserted into the slit 16 of the piece 17 by a spring 27 interposed between the collar 25 and the pin support cylinder 24. It is pushed in by the elasticity of a spring 27. 28 is the positioning pin 26
a handle fixed to the tail end of the handle, the end face 28 of the handle
A is formed as an inclined surface, and the end surface 24a of the pin support cylinder corresponding to the end surface of this handle is also formed as an inclined surface. Therefore, when the lever 29 of the handle 28 is held and the positioning pin 26 is rotated together with the handle 28, the positioning pin 26 resists the elasticity of the spring 27 and moves along the chain line due to the action of both inclined surfaces 28a and 24a. It is drawn out as shown.

The structure of this embodiment has been described above, and its operation will now be described. The rotary plate 12 is rotatably supported on the fixed shaft 9, and the rotary plate 12 is divided into four equal parts in the circumferential direction. It has a piece 17 having a radial slit 16 at each position, and furthermore, a positioning pin 26 to be pushed into the slit 16 of any one of the pieces 17 is supported by a collar part 11 integral with the fixed shaft 9. Since the positioning pin 2
6 and the slit 16, the rotary plate 1
2 positioning is performed.

Therefore, according to the present invention, when changing the orientation of the scribing needle holder 20 having the scribing needle 8 in the horizontal direction or in the horizontal direction, first hold the lever 29 of the handle 28 and press the positioning pin together with the handle 28. 26
When the handle 28 is rotated, the end face 28a of the handle 28 and the end face 24a of the pin support cylinder 24 act to move the tip of the positioning pin 26 into the slit of the rotary plate 12 due to the elastic resistance of the spring 27. It is drawn from piece 17 of 16. Thereafter, the rotary plate 12 rotatably supported by the fixed shaft 9 is rotated appropriately, and the tip of the positioning pin 26 is engaged with the piece 17 in the other desired slit 16, thereby forming the desired position. The scoring needle holder 20 having the scoring needles 8 oriented can be changed.

Therefore, the gist of the present invention is that the slit 16
Since the pieces 17 having the following shapes are provided at four equal positions in the circumferential direction of the rotary plate 12, the rotary plate 12 is positioned at a quarter rotation, that is, at a rotation position of 90 degrees. be able to. Therefore, for example, it is possible to very easily change the orientation of the scoring needle 8 that was pointing in the vertical direction to the horizontal direction, or to change the orientation of the scoring needle 8 that was pointing in the horizontal direction to the vertical direction.

Further, in the present invention, the tip of the positioning pin 26 is formed into a conical shape, and this conical portion is configured to abut and lock with the mouth edge of the slit 16, so that the conical portion and the slit 16
Even if the rim of the slit is slightly worn, the conical portion and the rim of the slit will surely come into contact with each other, allowing the rotary plate 12 to be positioned without play, thereby ensuring accurate measurement. can be implemented.

Further, since the pulling and pushing operation of the positioning pin 26 is achieved by only slightly rotating the positioning pin 26, the workability is extremely good, and the position of the rotary plate 12 can be changed quickly and accurately. It's also effective.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, with FIG. 1 being a perspective view showing the entire three-dimensional measuring machine, and FIG. 2 being a cutaway front view of the main parts showing the scriber holder.
FIG. 3 is a side view thereof. 1~ Surface plate, 2~ Base, 3~ Vertical scale axis, 4~
Scale axis holder, 5 - horizontal scale axis, 6 - scriber holder, 7, 8 - scribing needle, 9 - fixed axis, 10 - sleeve, 11 - tsuba, 12 - rotating plate,
13 - bearing, 14 - threaded ring, 15 - recess,
16~slit, 17~piece, 18~screw, 19~
Arm, 20 ~ scribing needle holder, 21 ~ tightening screw,
22 - scribing needle holding part, 23 - tightening screw, 24 - pin support cylinder, 24a - end face, 25 - flange, 26 - positioning pin, 27 - spring, 28 - handle, 28a - end face, 29 - lever.

Claims (1)

[Claims] 1 A collar 11 is formed integrally with the fixed shaft 9 at the middle outer circumference of the fixed shaft 9 fixed to the horizontal scale shaft 5 via a sleeve 10, and a collar 11 is integrally formed with the fixed shaft 9 at the other end via a bearing 13. The rotary plate 12 is held in close contact with the side surface of the collar 11 by a screw ring 14 screwed onto the other end of the fixed shaft 9. On the joint surface of
Four recesses 15 are formed at intervals of 90 degrees in the circumferential direction, and a piece 17 having a slit 16 extending in the radial direction of the rotary plate 12 is buried in each recess 15, and a piece 17 is inserted into the recess 15 by a screw 18. A pair of arms 19 are fixed inside the rotating plate 12 and protrude from the side surface opposite to the recess 15 of the rotary plate 12.
9 holds a scribing needle holder 20 whose side surface is approximately U-shaped. Another scribing needle holder 22 is provided on the circumferential side of the rotary plate 12, and the scribing needle 8 is attached to this scribing needle holder 22 with a tightening screw 23, and a pin is attached to the flange 11. A support cylinder 24 is provided, and a positioning pin 26 having a conical tip and a flange 25 in the middle is inserted into the pin support cylinder 24. The positioning pin 26 is moved by a spring 27 interposed between the collar 25 and the pin support tube 24.
The conical end of the locating pin 26 is pushed into the slit 16 of the piece 17 by the elasticity of the spring 27.
The handle 28 is fixed to the tail end of the handle 28, and the end surface 28a of the handle 28
is formed into an inclined surface, and the end surface 24a of the pin support cylinder corresponding to the end surface of this handle 28 is also formed into an inclined surface, and the positioning pin 26 can be rotated together with the handle 28 by holding the lever 29 of the handle 28. For example, due to the action of both inclined surfaces 28a and 24a, the positioning pin 26 resists the elasticity of the spring 27 and moves to the lever 29.
A scriber holder for a three-dimensional measuring machine, characterized in that it can be pulled out in the position direction.