JPH01311214A - Scale apparatus - Google Patents

Abstract

PURPOSE:To make unnecessary a tap-hole machining for mounting on the outside wall of a scale housing body and to make speedy a reinstallation of a moving component of a detecting part by fixing the moving member of the detecting part to the 2nd member. CONSTITUTION:Projecting parts 32A, 32B of the moving member 31 of the detecting part (a headslider) and recessed parts 13a, 13b of an intermediate member 33 are fitted respectively, thereby a positioning relation of the moving member 31 and the member (a mounting bracket) 33 can be held constant within a limit of the specified allowable tolerance. So, the use of positioning metal fittings as the attachment to fix the moving member 31, which is a type of fixing by screwing to the outside wall of the scale housing body 22, is unnecessary. In case the apparatus is reinstalled after it is detached for the maintenance of a machine tool, the moving member 31 is installed on the initially mounted position within the limit of the specified allowable tolerance by only fitting the projecting parts 32A, 32B of the moving member 31 to the recessed parts 13a, 13b of the member 33 respectively. Thus, the reinstallation of the moving member 31 to the 2nd member can be performed very quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a scale device suitable for use in machine tools, measuring instruments, etc., for detecting the amount of displacement between two members that are relatively displaced.

[Summary of the invention]

The present invention is a scale device suitable for use in machine tools, measuring machines, etc., which includes a scale storage body in which a scale is arranged, a detection section that reads the scale of the scale and outputs a displacement signal, and this detection section. and a detection part moving member that is freely displaceable along the scale storage body in conjunction with the scale storage body, and the scale storage body and the detection part movement member are fixed to the first and second members respectively. In a scale device that detects the amount of relative displacement between two members, the detection unit moving member is provided with a protrusion or a recess for positioning, and a member having a recess or a protrusion that fits into each of the protrusions or recesses is inserted. By fixing the detection part moving member of the lever to this second member, the attached positioning metal fittings of the type used with screws for positioning this detection part moving member and this metal fitting can be attached to the scale storage body. This eliminates the need for tapped holes for fixing to the outer periphery of the scale device, reducing the cost of the scale device.
This makes it possible to quickly reattach the components.

(Prior art) -A scale device is used in machine tools, measuring instruments, etc. to detect the amount of relative displacement between two relatively displaced members.An example of such a conventional scale device is shown in the following. This is shown in FIGS. 10 and 11.

In Fig. 1θ and Fig. 11, +11 indicates a scale storage body, and this scale storage body (1) is connected to an iron scale channel (magnetic shield) (3) in which a scale (2) is installed. After installing the flat cover (4) and back cover (5), attach side covers (6L) to both sides respectively.
), (6R) are installed. and,
The scale storage body (1) has mounting seats (7) fixed on both sides.
L), bolt through (7R)! 81. +81 to the moving member (9). in this case,
The position of the magnetic scale (2) is adjusted so that the longitudinal direction thereof is parallel to the moving direction (X direction) of the moving member (9).

In addition, (10) indicates a detection head that reads the graduations of the magnetic scale (2) and outputs a displacement signal, and this detection head (10) is connected to a navel slider (10) as a detection part moving member.
1), and this hent slider (11) is further attached to a fixing member (14) with bolts (13) via a bracket (12). Therefore, when the moving member (9) is displaced in the X direction, the detection head (1)
0) and the head slider (11) are displaced along the opening (1a) of the scale storage body (1) by the amount of displacement thereof,
A displacement signal is output from the signal cable (15).

In the scale device described above, the head slider (11
) is freely displaceable in the Y direction (due to the deflection of the magnetic scale (2), etc.) and rotatable in the θ direction when it is not restrained, and the head slider (11) is connected to the magnetic scale (
2) In order to hold the head slider (11) in a position that does not cause damage, etc., and to hold it in a position where accurate displacement detection can be performed, it is necessary to accurately position the head slider (11) with respect to the scale storage body (1). A jig is required. Therefore, conventionally, the signal cable (
15) In a state where the best displacement signal can be obtained, move the scale storage body [1) and head slider (11) to the 11th position.
As shown in the figure, they were connected via an attached positioning metal fitting (16) and four mounting screws (17). This attached positioning metal fitting (16) is attached to the scale storage body (1) through the holes (4a) and (4b) drilled in the flat cover (4).
Attach to the tapped holes (3a), (3b) formed in the scale channel (3) through the screws (17),
It is fixed by (17).

In order for the user to install this scale device on a machine tool, etc., first use the attached positioning bracket (16) as shown in Figure 10.
Scale storage body (1) and head slider (
11) to the scale storage body (moving member (9) on the 1+ side).
Attach to. After that, to install the bracket (12) on the fixed member (14), temporarily fasten the bracket (12) with the bolt (13), and then use the looseness of the long parts (13a) and (13b) to attach the bolt (19) of the hent slider (11). ) to screw together, adjust the position of the bracket (12) in the Y direction and fix it. Next, insert the spacer (18) between the hent slider (11) and the mounting bracket (12), tighten the pole (19), and attach the head slider (11) to the mounting bracket (12). . Thereafter, the attached positioning metal fitting (16) is removed from the scale storage body +11 and the Hent slider (11), and the installation process is completed.

In addition, after using a machine tool, etc., when it is necessary to remove the scale device for maintenance of this machine tool, etc., the attached positioning bracket (16) can be fixed again to the scale storage body (1) and head slider (11). do. Then, loosen the pol) (19) and the hent slider (11)
To install it, remove it from the bracket (12), and then remove the scale storage body +11 from the moving member (9).

After the maintenance of the machine tool, etc. is completed, the scale device is reinstalled according to the procedure used for the initial installation.

[Problem to be solved by the invention]

However, in such conventional scale equipment,
It requires a lot of man-hours to attach the attached screw-type positioning bracket (16) for positioning the detection unit moving member (head slider (11)) at the time of shipping adjustment. Attachment position seedling fixing bracket (16
), it was necessary to drill tapped holes for fixing the scale device, which resulted in the inconvenience of increasing the cost of the scale device.

Furthermore, in conventional scale devices, before removing the scale device for maintenance of machine tools, etc., it is necessary to attach the attached positioning bracket (16) in preparation for reinstallation, and also to attach the head slider (11) to the fixing member ( 14) side, in order to fix it again on the placket (12), move the drive motor etc. to move the movable member (9).
The scale device had to be moved delicately in the X direction (see FIG. 10), and it took a very long time to reinstall the scale device.

In order to eliminate this inconvenience, it may be possible to reinstall the scale device by removing the attached positioning fitting (16). However, as shown in FIG. 12, the bolt (19) of the head slider (11),
(19) Respective mounting holes (lla) and (llb
) has some play, so bolt (19), (
19), when the head slider (11) is mounted and fixed to the bracket (12), there is a risk that the head slider (11) will be tilted and fixed at the position shown by the broken line (11').

The present invention has been made in view of the above points, and its purpose is to eliminate the need for an attached positioning bracket of the type that is fixed to the scale storage body with screws, and to eliminate the need for mounting on the outer periphery of the scale storage body. There is no need to process tapped holes, and
An object of the present invention is to propose a scale device in which a detection part moving member can be quickly reattached.

[Means to solve the problem]

The scale device according to the present invention has a scale storage body (2) equipped with a scale (2), as shown in FIGS. 1 and 2, for example.
22) and its scale (2) to find the displacement 4.
A detection unit (10) that outputs No. 3 and this detection unit (10)
and a detection part moving member (31) which is freely displaceable along the scale storage body (22) in conjunction with the scale storage body (22) and the detection part movement member (31), respectively. (9) and a second member (14) to detect the amount of relative displacement between these first and second members, the scale device has a positioning convex portion ( 32
A), (32B) are provided, and these convex parts (32A)
, (32B) respectively fit into the recesses (13a), (
The detection unit moving member (31) is fixed to the second member (14) via the member (33) having the second member (13b).

(Function) According to the present invention, the convex portions (32A) and (32B) of the detection portion moving member (31) are fitted into the concave portions (13a) and (13b) of the intermediate member (33), respectively. Therefore, the positional relationship between the detection part moving member (31) and the member (33) can be kept constant within a predetermined tolerance.Therefore, in order to fix the detection part moving member (31), There is no need to use the attached positioning metal fittings, which are screwed onto the outer periphery of the scale storage body.

In addition, when reinstalling the scale device after removing it for maintenance of a machine tool, etc., the convex portion (32A) of the detection portion moving member (31)
, (32B) into the recess (13a) of the member (33)
.

(13b) by simply fitting them into the detection unit moving member (13b).
31) is installed at the initially installed position within a predetermined tolerance range. Moreover, the detection part moving member (31)
is movable along the scale storage body (22), so reinstallation does not require moving the drive motor or the like to relatively displace the first and second members. The reattachment of 31) to its second member can be carried out very quickly.

〔Example〕

Hereinafter, one embodiment of the scale device of the present invention will be explained with reference to FIGS. 1 to 8. In FIGS. 1 to 8, parts corresponding to FIGS. , and detailed explanation thereof will be omitted.

Figures 1 and 2 show the scale device of this example attached to two relatively displaceable members of a machine tool, etc. In Figures 1 and 2, (22) indicates a magnetic scale of a predetermined pinch. This scale storage body (22) is equipped with a Rondo-shaped magnetic scale (2) formed on both sides of an iron scale channel (magnetic shield) (23) with a substantially U-shaped cross section. Holding parts (24) on each surface,
After fixing (25), this scale channel (
23) is attached to the inside of a housing cover (27) which also has a substantially U-shaped cross section and is integrally formed of drawn aluminum or the like. In this case, the scale channel (2
3) and the housing cover (27), there are two leaf springs (
26), (26) are arranged, and the scale channel (23) is always urged in the A direction and the B direction against the housing cover (27) to hold the scale channel (23). .

Further, a spherical part (24a) is formed at one end of the holding part (24), a cylindrical part (25a) is formed at one end of the holding part (25), and the center of the spherical part (24a) and the cylindrical part (25
The rond-shaped magnetic scale (2) is installed on a straight line connecting the center of a), and the magnetic scale (2) is inserted in advance into a detection head (10) that reads the magnetic scale.

With this structure, the positional relationship of the magnetic scale (2) with respect to the scale channel (23) can be set to approximately the designed positional relationship. Furthermore, in this example, the scale channel (23) is biased in the A direction and the B direction by the leaf spring (26) and brought into close contact with the housing cover (27), so that the scale channel (23) The distance of the magnetic scale (2) from the two surfaces PA and PB can be set to a constant value within a predetermined error. Therefore, the orthogonal 2
Each of the planes P^ and PR can be considered a "reference plane".

Further, side covers (28L) and (28R) are respectively placed on both sides of the scale storage body (22). The spherical part (24a) of the holding part (24) is fixed to the moving member (9) via the receiving part (29), and the cylindrical part (25a) of the holding part (25) is fixed to the receiving part (30). moving member (9) through
Fixed to. In this case, the magnetic scale (2) in the scale storage body (22) moves in the moving direction (X
the receiving parts (29) and (30) so that they are parallel to the
Adjust.

The detection head (10) in the scale storage body (22) passes through the opening (22a) of the scale storage body (22) to a slider (31) with a thickness of t as a detection unit moving member.
Two rod-shaped positioning pins (32^) and (3211) are attached to the head slider (31) by driving them into the through holes or by gluing them. in this case,
At least one end of each of the pins (32A) and (32B) protrudes from the outer surface of the head slider (31) to form a convex portion, and the head slider (31) is moved in such a manner that a good displacement signal can be obtained. - face (31e)
is set at a distance ML2 from the reference plane PB of the scale storage body (22), and the dimensions of each part are set so that the centers of the positioning pins (32A) and (32B) are set at a distance L1 from the reference plane P^. put. And that head slider (
31) locating pins (32A) and (32B) are attached to the reference holes (13a) and (1) of the bracket (33).
3b) respectively fitted with the bolts (34) and (
34), the head slider (31) is fixed to the bracket (33), and the bracket (33) is fixed to the fixing member (14) by bolts (13), (13). In addition, the positioning pin (
32A) and (32B), the diameter of each of the reference holes (13a) and (13b) formed in the bracket (33) will be 3.
Set to about 1 *m. Also, in Figure 2, (3
5L) and (35R) are dustproof seals, respectively.

The manufacturing process of the scale storage body (22) of the scale device of this example will be explained with reference to FIG. 3. The scale channel (23) includes a magnetic scale (2), a detection head (10)
, the holding part (24) and the holding part (25) are attached.

And the corner (23a) of the scale channel (23)
A plate spring with a chevron-shaped cross section (26) using double-sided tape, etc.
(26) are installed at specified intervals. In this case, the leaf spring (
One end (26e) of each of 26) is bent at right angles, and the scale channel (23) covered with the leaf springs (26) and (26) is pushed into the housing cover (27), and then the scale channel (23) covered with the leaf springs (26) and (26) is pushed into the housing cover (27). Side cover (28L), (
28R).

Next, for installation, the bracket (33) is positioned so that the hent slider (31) of the scale device of this example has the positional relationship shown in FIG. 2 with reference to the reference planes PA and PB of the scale storage body (22). Figure 4 shows the procedure for carrying out
This will be explained with reference to FIG. In this case, as shown in FIG.
The spacing between pins (2A) and (32B) is M, and the distance between pins (32A) and (32B) is M.
) (or (32B)) and the long hole (31) for the bolt (34).
It is assumed that the interval with cH or (31d)) is set to m, respectively. Therefore, during installation, the distance between the reference holes (13a) and (13b) of the bracket (33) should be M, and the reference hole (
13a) (or (13b)) and the tapped hole (13e) (or (13f)) for the bolt (34) is machined in advance so that the distance is also m.

In this example, as shown in FIG. 4, the mounting uses a slider positioning jig (35) for positioning the Hent slider (31) by positioning the bracket (33). This slider positioning jig (
35) includes a reference plane PA of the outer peripheral surface of the housing cover (27);
Form reference planes Pa and Pb corresponding to PR respectively, and drill two reference holes (35a) and (35b) with FJM at a distance ML from the reference plane Pa, and at a distance ML from the reference plane pb. A bottom surface (35e) is formed at L2. The inner diameters of the two reference holes (35a) and (35b) are the reference hole (13a).

Make it the same as the inner diameter of (13b). Then, a retaining leaf spring (36) is attached to the slider positioning jig (35) with a screw (
37), and the protrusion (35d) is attached to the scale storage body (2).
2) into the opening (22a), in this case,
One end (36a) of the leaf spring (36) is bent and inserted into the fixing hole (35c) of the slider positioning jig (35) to prevent rotation. In addition, a slider positioning jig (3
5) The thickness of the portion where the reference holes (35a) and (35b) are formed is set to the same thickness t as the head slider (31).

This slider positioning jig (35) is connected to the scale storage body (
22), as shown in Figure 5, insert the projection (35d) of the slider positioning jig (35) into the opening (22a) of the scale storage body (22), and Connect the other end (36b) of the leaf spring (36) to the housing cover (2).
7) abut against the corner. Then, press the Mutan spring (
36) in the θ direction, the slider positioning jig (35) moves into the scale storage body (2) as shown in FIG.
Closely adhere to 2). Also, the other end (3) of the temporary spring (36)
6b) fits into the groove (27a) of the housing cover (27), and the slider positioning jig (35) is held in close contact with the scale storage body (22) by the biasing force of the leaf spring (36). Furthermore, by rotating the leaf spring (36) in the minus θ direction, the slider positioning jig (
35) can be easily removed from the scale storage body (22). Therefore, the slider positioning jig (35)
is detachable from the scale storage body (22). In addition, the slider positioning jig (35) is mounted on the scale with its reference surface Pa in close contact with the reference surface PA of the scale storage body (22), and with its reference surface Pb in close contact with the reference surface PB of the scale storage body (22). It is slidable in the longitudinal direction (X direction) of the storage body (22).

After attaching the slider positioning jig (35) described above to the scale storage body (22), move the head slider (31) to one end of the scale storage body (22) and attach the fixing member (1).
4) Attach the bracket (33) to the bolt (13),
Temporarily fasten using (13) (Figure 4). And the sixth
As shown in the figure, the slider positioning jig (35) is slid and installed so that it overlaps the bracket (33), and the positioning pins (32A) are inserted into the reference holes (35a) and (35b).

Reference rods (38) having the same diameter as (32B) are inserted one after another.

The reference rod (38) is attached to the bracket (33).
) side reference holes (13a) and (13b) respectively, use the play in the elongated holes (13c) and (13d) to adjust the position of (33). And the slider positioning jig (35)
The bottom surface (35e) of the bracket (33) is attached to the top surface (33) of the bracket (33).
To install, place a spacer etc. on the bottom of the bracket (33) so that the distance H between the bracket (33a) and the ) to be fixed. Thereafter, the slider positioning jig (35) is removed from the scale storage body (22). To install it, move the head slider (31) so that it overlaps with the bracket (33), and then insert the positioning pin (32^) of the hent slider (31), (32B
) to the reference hole (13a) of the bracket (33).
, (13b), then bolt (34)
, When the head slider (31) is fixed to the bracket (33) according to (34), the head slider (
31) are maintained so as to maintain the positional relationship shown in FIG. 2 within a predetermined tolerance range. Therefore, a good displacement signal can be obtained from the detection head (lO).

Further, when it is necessary to remove the scale device of this example for maintenance of a machine tool etc. to which the scale device of this example is installed, first remove the bolts (34) and (34).
) to separate the hent slider (31) from the mounting bracket (33). Next, the clamp (29a) of the receiving part (29) and the clamp (30a) of the receiving part (30) are released and the scale storage body (22) is removed, thereby completing the removal of the scale device. When reinstalling the scale device, first attach the receiving part (29).

Attach the scale storage body (22) via (30).

In this case, since the receiving parts (29) and (30) are in the same state as in the initial state, the scale storage body (22) is installed in the same state as in the initial state. Next, slide the hent slider (31) along the opening (22a) and attach its positioning pins (32A) and (32B) to the reference holes (13a) and (13) of the bracket (33), respectively.
b). And bolt (34), (3
4) Attach the head slider (31) and fix it to the bracket (33) to complete the reattachment of the scale device.

As described above, according to the scale device of this example, the positioning pins (32A) and (32B) of the head slider (31)
) are installed in the reference hole (13a) of the bracket (33).
, (13b) so as to fit into the head slider (3).
1), the Hent slider (31) is always installed in the designed positional relationship, and the attached positioning bracket of the type that is attached to the outer periphery of the scale storage body (22) with screws is used as in the past. There's no need. Therefore, there is no need to perform tap hole processing on the outer periphery of the scale storage body (22), and there is an advantage that the manufacturing cost of the scale device can be reduced.

Furthermore, since there is no need to process tapped holes on the outer periphery of the scale storage body (22), the thickness of the outer periphery can be made thinner, which has the advantage of making the scale device more compact.

In addition, when reinstalling the scale device of this example, the head slider (31) is slid along the scale storage body (22) and its positioning pins (32A), (32
To install B) respectively, use the bracket (33)') i and the single hole (
13a) and (13b), positioning is achieved by simply fitting the parts 13a) and 13b, which has the advantage that reinstallation can be carried out very quickly. In particular, in this example, the moving member (9) is not moved by a drive motor or the like, and the hent slider (3
1) To install, all you have to do is move it so that it overlaps the bracket (33), so reinstallation can be done almost with one touch, and work efficiency is much improved compared to the conventional method.

In addition, the scale HE of this example has reference planes PA and PB set on the outer peripheral surface of the scale storage body, and the head slider (31)
A good displacement signal is obtained when the reference planes P and PB are in a predetermined positional relationship with respect to the reference planes PA and PR, respectively.
It becomes possible to use a slider positioning jig (35) having a and pb, and the bracket (33) can be mounted quickly and accurately. Therefore, there is an advantage that the initial positioning of the head slider (31) can be performed quickly.

In this case, since the slider positioning jig (35) is slidable along the longitudinal direction (X direction) of the scale storage body (22), its installation also takes place when positioning the bracket (33). There is no need to move the moving member (9) with a drive motor or the like, so that the initial installation of the scale device can also be carried out very quickly.

Although the scale device of this example has the above-mentioned advantages, since the hent slider (31) is not fixed, the head slider (31) swings during transportation etc. and the detection head (10) etc. may be damaged. There is a risk of Therefore, when the scale device of this example is being transported, both ends of the head slider (31) are covered with slider covers (39), as shown in FIG.
, (39) to fix it. The slider cover (39) is made of flexible resin and is formed so that its inner surface lightly touches the outer peripheral surfaces of the housing cover (27) and the Hent slider (31).

In addition, as shown in Fig. 8, the slider cover (39)
The protrusion (39a) is connected to the opening (22) of the scale storage body (22).
22a), and one end of it (39b).
) so as to cover the housing cover (27).

To remove the slider covers (39), (39), first move one cover (39) in the X1 direction,
After moving the other cover (39) in the X2 direction, the other end (39c) of each cover (39) may be pulled up in the φ direction (see FIG. 8). This slider cover (39)
According to the method, the slider cover (39) can be easily removed from the scale storage body (22) even after the scale storage body (22) is attached to the moving member (9) as shown in FIG. There is profit.

In the above embodiment, the hent slider (31) is provided with convex portions (32A) and (32B), and the bracket (33) is provided with concave portions (13a) and (13b).
), but the present invention is not limited thereto; for example, as shown in FIG. 9, reference holes (41a) and (41b) as recesses may be provided in the head slider (41). In this case, the mounting bracket (44) has a reference hole (
44a) and (44b) are provided, and these reference holes (44a) and (44b) are provided.
a) and (44b) each have a connecting pin (
43^) and (43B) are fitted, and these connecting pins (43A) and (43B) are connected to the head slider (41).
It is only necessary to fit it into the reference holes (41a) and (41b). According to this example, the installation is by Plaquen) (44)
To position the slider, use the slider positioning jig (3) shown in Figure 4 with the connecting pins (43A) and (43B) removed.
5).

Furthermore, although the above-mentioned embodiment shows an example in which the present invention is applied to a scale device using a magnetic scale method, the present invention is not limited thereto, and may be applied to a photoelectric scale device using a glass scale, for example. It is clear that the present invention can be applied to all scale devices in which the scale storage body and the detection unit moving member are fixed to the first and second members, respectively, such as scale devices of the IT magnetic induction type. Further, the present invention is applicable not only to linear scale devices but also to a broader scale device for detecting rotational displacement such as a rotary encoder. As described above, the present invention is not limited to the above-described embodiments, and it goes without saying that changes can be made without departing from the gist of the present invention.

〔Effect of the invention〕

In the scale device of the present invention, a protrusion or a recess for positioning is formed in the detection part moving member (31), and the detection part moving member (3
1) is fixed to the second member (14), the positional relationship between the detection unit moving member (31) and the member (33) is almost uniquely determined, and the outer periphery of the scale storage body (22) is fixed. There is no need to use an attached positioning bracket that is fixed to the scale with screws (and the process of drilling tapped holes on the outer periphery of the scale storage body (22) can be omitted, reducing the manufacturing cost of the scale device. There are practical benefits.

Furthermore, when reattaching the scale device, it is only necessary to fit the convex part or concave part of the detection part moving member (31) into the corresponding concave part or convex part of the member (33). There is a practical advantage that reinstallation can be done very quickly. In particular, according to the present invention, the detection part moving member (31) can be reattached by simply moving it along the scale storage body (22), and the first member (9) and the second member can be reattached by moving the drive motor or the like. There is no need to displace the member (14) relative to each other.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the scale device of the present invention;
Figure 2 is a cross-sectional view taken along line nn in Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
Figure 4 is an exploded perspective view of the scale storage body (22) shown in the example, Figure 4 is a perspective view for explaining how to install it to a machine tool, etc. in the example shown in Figure 1, Figures 5 and 6 are the example shown in Figure 4. , FIG. 7 is a perspective view for explaining the method of fixing the head slider (31) of the example in FIG. 1, FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7, and FIG. 10 is a perspective view showing a conventional scale device, FIG. 11 is a sectional view of FIG. 1O seen from the X direction, and FIG. 12 is a plan view of FIG. 1O. be. (2) is a magnetic scale, (10) is a detection head, (22
) are scale storage bodies, (31) and (41) are sliders, (32A) and (32B) are positioning bins, (33) and (34) are mounting brackets, and (35) is a slider positioning jig. Ingredients, (41a),
(41b) are reference holes, respectively.

Claims (1)

[Scope of Claims] A scale storage body provided with a scale, a detection unit that reads the scale of the scale and outputs a displacement signal, and a detection unit that is freely displaceable along the scale storage body in conjunction with the detection unit. The scale storage body and the detection unit moving member are fixed to the first and second members respectively, and the first and second parts are fixed to the first and second members.
and a scale device that detects the amount of relative displacement between a second member, wherein the detection unit moving member is provided with a positioning protrusion or recess, and a member having the recess or protrusion that fits into the protrusion or recess, respectively. A scale device characterized in that the detection unit moving member is fixed to the second member via.