JPH0114474Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a head connecting part attachment device that can separably fix the head to the vertical cursor plate of a rail type universal parallel ruler.

Conventionally, as a device of this type, a head connecting part mounting device for a rail type flexible parallel ruler configured to be able to press and fix a cursor side link member to a vertical wall surface on a vertical cursor plate was disclosed in Japanese Utility Model Publication No. 1986-
As described in Publication No. 15038, with this device,
A vertical wall surface and a horizontal platform are provided on the vertical cursor board for attaching a link mounting plate to which a cursor-side link member is fixed, and a mounting hole is provided in the base of the vertical wall on the same plane as the horizontal platform, While inserting the link mounting plate into the mounting hole, a screw hole is provided from above toward the mounting hole, a pivot screw shaft with a sharp tip is screwed into the screw hole, and then the link mounting plate is inserted into the link mounting plate. , by providing a tapered hole facing the pivot screw shaft into which the tip of the pivot screw shaft fits, and press-fitting the tip of the pivot screw shaft into the tapered hole, the cursor side link member fixed to the link mounting plate is fixed to the link mounting plate. Since it is configured to be crimped to the vertical wall surface on the vertical cursor plate, the connection between the pivot screw shaft and the link mounting plate is established only when its tip is press-fitted into the tapered hole, and therefore the weight of the scale and head is reduced. If the pivot screw shaft is not completely screwed into the screw hole while the link mounting plate is positioned within the hole, the tip will not be able to connect with the tapered hole, resulting in an unstable device. There is a problem that the fixing work is quite difficult, and furthermore, because the taper hole of the link mounting plate is thin, the length of the tapered slope is small, and the tip of the pivot screw shaft moves when press-fitting into the taper hole. Since the distance is only short and the pressure contact surface is small, there are problems of damage and wear due to concentrated loads, and sufficient strong tightening force and durability cannot be obtained.

Therefore, the present invention aims to prevent the weight from moving up and down when the link mounting plate, which has a fixed cursor-side link member that receives the large load of the scale or head via a parallel link member that can move up and down, is mounted on the vertical cursor board. Even if the vertical rail is biased toward one side of the rail and is in a very unstable state, by screwing the fixing screw into the screw hole of the link mounting plate, the temporary fixing will be completed, and then the head can be easily attached. Tighten the fixing screw while checking the contact status of the scale and the drawing board surface.
The link mounting plate can be fixed on the vertical cursor plate with the scale and head in an appropriate state, and when the fixing screw is tightened, the link connecting cam is placed in contact with the wide tapered surface in the mounting hole of the vertical cursor plate. While moving along the slope of the tapered surface toward the vertical wall, the cursor-side link member fixed to the link mounting plate can be firmly crimped to the vertical wall above the vertical cursor by wedge action, making it possible to use it for a long period of time. Therefore, even if the pressure contact surface between the tapered surface and the cam wears out, the present invention aims to provide a device with excellent tightening accuracy and durability, which can easily and firmly fix the fixing screw by increasing the amount of tightening of the fixing screw.

The structure of the present invention will be explained in detail below based on the embodiment shown in the attached drawings. 1 is a vertical rail whose upper end is supported by a horizontal rail fixed to the upper edge of the drawing board, and which is horizontal to the drawing board. You are advised to move to. A cursor plate 2 is provided on the lower surface of the vertical rail 1 so as to be movable along the vertical rail 1, and a head 5 for operating the scale 4 is connected to the cursor plate 2 via a parallel link mechanism 3. Parallel link mechanism 3
The cursor side link member 6 provided on the cursor plate 2 and the head side link member 7 supporting the head are mutually rotated to a link member 9 by a link shaft 8 parallel to the longitudinal direction of the vertical rail 1. Similar to the conventional apparatus, the head 5 and the scale 4 can be moved up and down with respect to the drawing surface.

Here, the head connecting portion attaching device according to the present invention includes the cursor plate 2 and the cursor side link member 6.
It is placed between.

That is, the mounting part of the cursor plate 2 has a vertical wall surface 1.
0 and a horizontal stand part 11, and the cursor side link member 6 is configured so that its bottom part 6b can be placed on the horizontal stand part 11 with the back part 6a in close contact with the vertical wall surface 10. There is. Further, a mounting hole 13 having a tapered surface 12 toward the vertical wall surface 10 is provided on the lower surface of the horizontal table portion 11,
Inside the mounting hole 13, a cam surface 14 is formed on the tapered surface 12.
The link connecting cam 14 is housed with the cams a facing each other. The link connection cam 14 is provided with a through hole 14b, through which the screw shaft 15a of the fixing screw 15 passes.

On the other hand, the cursor side link member 6 is provided with an inner wall surface 6c parallel to the back surface 6a, and a screw hole 16 is bored in this inner wall surface 6c. Then, the inner wall of the vertical piece of the link mounting plate 18 having an L-shaped cross section is fixed to the inner wall surface 6 by means of the mounting screws 17 in the screw holes 16.
It is constructed so that it can be fixed in close contact with c. Further, the horizontal piece of the link mounting plate 18 is provided with a screw hole 19 that is screwed into the fixing screw 15, and the horizontal piece of the link mounting plate 18 is in close contact with the horizontal base portion 11, and the cursor attached thereto is The back side portion 6a of the side link member 6 is configured to be in contact with the vertical wall surface 10.

In the embodiment of the device of the present invention having the above configuration, first, the inner wall surface 6c of the cursor side link member 6 is
The inner wall of the vertical piece of the link mounting plate 18 is opposed to the
The mounting screw 17 is screwed into the screw hole 16 to fix the cursor side link member 6 and the link mounting plate 18 together. Next, the lower surface of the horizontal piece of the link mounting plate 18 is placed on the horizontal base part 11, and the screw shaft 15a of the fixing screw 15 inserted into the mounting hole 13 through the link connecting cam 14 is inserted into the link mounting plate 18. 18 screw holes 19
Screw it into place and tighten. At this time, the cam surface 14a of the link connecting cam 14 is attached to the tapered surface 12 of the mounting hole 13.
, the fixing screw 15 , the link mounting plate 18 , and the cursor-side link member 6 move along with the link connecting cam 14 toward the vertical wall surface 10 that is the inclined direction of the tapered surface 12 , and the cursor-side link member 6
The cursor-side link member 6 can be integrally fixed to the cursor plate 2 with the back surface 6a of the cursor side link member 6 pressed against the vertical wall surface 10 on the cursor plate 2. Also,
Conversely, by removing the fixing screw 15, the cursor side link member 6 can be easily removed from the cursor plate 2. Furthermore, by setting the angle between the vertical piece and the horizontal piece of the link mounting plate 18 to be acute or obtuse with respect to the right angle, the horizontal angle of the head 5 and scale 4 with respect to the cursor plate can be adjusted. I can do it. Furthermore, by forming the fitting holes for the mounting screws 17 on the vertical pieces of the link mounting plate 18 into elongated holes in the vertical direction, the height of the cursor side link member 6 can be made variable at the time of mounting. It also becomes possible to adjust the adhesion of the scale to the drawing board.

As described above, according to the head connecting part attachment device for a rail type universal parallel ruler configured to be able to press and fix the cursor side link member to the vertical wall surface of the vertical cursor plate according to the present invention, the vertical cursor plate 2 A vertical wall surface 10 and a horizontal base part 11 are provided on the top for attaching the cursor side link member 6, and a mounting hole 13 having a tapered surface 12 that widens toward the vertical wall surface 10 is provided on the lower surface of the horizontal base part 11. A link connecting cam 14 is accommodated in the mounting hole 13 in opposition to the tapered surface 12, and a fixing screw 15 is provided passing through the cam 14, while a link mounting plate 18 is fixed to the cursor side link member 6. , has a structure in which a screw hole 19 for screwing into the fixing screw 15 is provided in a portion of the link mounting plate 18 that is in close contact with the horizontal base portion 11, and in particular, the fixing screw 15 penetrates the link connecting cam 14. Since the link mounting plate 18 is configured to be screwed into the screw hole 19 of the link mounting plate 18, the link mounting plate 18 can be temporarily fixed onto the vertical cursor board using the fixing screws 15, so that the large loads of the scale 4 and head 5 can be easily fixed. When attaching the link mounting plate 18 to which the cursor-side link member 6, which is movable up and down and is supported via the parallel link member 9, is fixed, on the vertical cursor board 2, the weight of the link mounting plate 18 is biased to one side of the vertical rail 1, which is movable up and down. However, in the present invention, by screwing the fixing screw 15 into the screw hole 19 of the link mounting plate 18, In this state, the temporary fixing is completed, and then tighten the fixing screws 15 while checking the contact status of the loose head 5 and scale 4 to the drawing surface, and attach the scale 4 and head 5 to the link mounting plate in the proper condition. The link connecting cam 14 can be fixed to the vertical cursor plate 2 via the vertical cursor plate 18, and furthermore, when the fixing screw 15 is tightened, the link connecting cam 14 that is in contact with the wide tapered surface 12 in the mounting hole 13 of the vertical cursor plate 2 is While moving along the slope of the tapered surface 12 toward the vertical wall surface 10, the cursor side link member 6 fixed to the link mounting plate 18 is firmly pressed to the vertical wall surface on the vertical cursor 2 by a wedge action. ,
Even if the pressure contact surface between the tapered surface 12 and the cam 14 wears out due to long-term use, by increasing the amount of tightening of the fixing screw 15, a sufficiently strong fixation can be achieved.
This has the effect of providing a device with excellent tightening accuracy and durability.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the device of the present invention, FIG. 2 is a vertical sectional front view of the main part thereof, and FIG. 3 is a partial cross-sectional plan view of the main part. 1: Vertical rail, 2: Cursor plate, 6: Cursor side link member, 10: Vertical wall surface, 11: Horizontal platform, 12: Tapered surface, 13: Mounting hole, 14: Link connecting cam, 15: Fixing screw, 16 : Screw hole, 1
7: Mounting screw, 18: Link mounting plate, 19: Screw hole.

Claims (1)

[Scope of utility model registration request] A vertical wall surface 10 and a horizontal base part 11 are provided on the vertical cursor plate 2 for mounting the cursor-side link member 6, and a mounting hole 13 having a tapered surface 12 wide toward the vertical wall surface 10 on the lower surface of the horizontal base part 11.
A link connecting cam 14 is housed in the mounting hole 13 in opposition to the tapered surface 12, and a fixing screw 15 is provided passing through the cam 14, while a link mounting plate is provided in the cursor side link member 6. 18 is fixed, and the horizontal base portion 11 of the link mounting plate 18 is fixed.
A head connection in a rail-type flexible parallel ruler, which is configured such that a screw hole 19 for screwing into the fixing screw 15 is provided in the part that comes into close contact with the ruler, so that the cursor side link member can be crimped and fixed to the vertical wall surface of the vertical cursor board. Part mounting device.