JPS59151011A - Fitting device for displacement measuring device - Google Patents

Abstract

PURPOSE:To execute easily and quickly a fitting work and to prevent an error from being caused after the fitting by clamping a bush in the axial direction through two spherical axis parts by a bolt, and fixing a holding member of the second detecting body to the second member through this bush. CONSTITUTION:In a state that the first detecting body 22 and the second detecting body 24 are fixed by a clamping tool, they are clamped to the first member 21 and the second member 23. In this case, when clamping a bolt 32, even when unbalance of a position of a holding member 28 to a fitting face 23A of the second member 23 is generated, its unblanace is absorbed and matched between spherical seats 26, 27 formed on both ends of a bush 25 and spherical axis parts 30A, 31A. Accordingly, the first detecting body 22 and the second detecting body 24 are fitted to the first member 21 and the second member 23 without generating a stress due to unbalance between both of them, in a state that a fixed state is maintained by its fixing tool, and after this fitting, the fixing tool is removed. In this way, the fitting work is executed easily and quickly, and an error after the fitting is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device for a displacement measuring device, and particularly to a mounting device for a displacement measuring device.
It has a first sensing body attached to a member, and a second sensing body attached to a second member and capable of reciprocating along the first sensing body together with the second member. , from the relative movement between the first sensing body and the second sensing body, the first sensing body
The present invention also relates to an improvement in a mounting device for mounting a displacement measuring device for measuring the relative displacement of the second portion to the first member and the second member.

One type of displacement measuring device for measuring or adjusting the relative position of two objects is one constructed as shown in FIG. 1, for example.

In the figure, an elongated case 1 has a substantially rectangular hollow cross section, is elongated in a direction perpendicular to the paper plane of FIG.

A detection mechanism 3 as a moving member is brought into contact with the end face of the elongated case 1 on the opening 2 side via a sliding member 4, and is movable along the longitudinal direction of the elongated case 1.

An arm portion 5 extending from the opening 2 into the elongated case 1 is integrally formed on the lower surface of the detection mechanism 3 . Further, a pair of magnets 6 are provided on the outer surface of the elongated case 1 in the vicinity of the opening 2 in the longitudinal direction of the elongated case 1. A closing member 7 made of an iron plate is attracted, and the opening 2 is closed.
It is designed to prevent dust and the like from entering into the elongated case 1.

At this time, the closing member 7 of the portion of the detection mechanism 3 into which the arm portion 5 is inserted is provided in the detection mechanism 3 and is inserted into a chevron-shaped side surface with both ends opened at the bottom surface of the detection mechanism 3. , the arm 8I is straddled by this groove 8! 5 can be inserted into the elongated case 1.

In the groove 9 provided in the longitudinal direction in the elongated case 1, there is a main scale 10 (first sensing body) having vertical striped scales formed on the negative side (scale surface) 10A. The lower end side is inserted and fixed with adhesive 11 or the like.

The arm portion 5 of the detection mechanism 3 extends to the vicinity of the main scale 10, and a slider 13 is movably attached to the tip thereof via a connecting means 12 made of, for example, a linear cantilever spring.

The connecting means 12 consisting of the cantilever spring is connected to the slider 13
is pressed against the graduation surface 10A of the main scale 10, which also serves as the first scanning reference surface, and the slider 13 is pressed against the graduation surface 10A of the main scale 10, which is a second scanning reference surface orthogonal to the graduation surface 10A of the main scale 10. It is also pressed against the end face 10B side.

The slider 13 is screwed to a contact mounting member 13A formed into an abbreviated shape from a temporary structure and a short side bent at one end of the contact mounting member 13A, and the scale of the main scale 10 is A thick light-emitting element mounting member 13B facing the unformed surface is screwed (not shown) to the other bent long side of the contactor mounting member 13A, and is attached to the graduation surface of the main scale 10. A thick light-receiving element mounting member 1'3G facing the main scale 10B, and a contact mounting member 13A of the slider 13 having a surface facing the graduation surface 10B of the main scale 10 has a similar shape to the main scale 10. An index scale 14 (second sensing body) having vertical striped scales (not shown) is fixed. This index scale 1
A light emitting element 15 as a light source and a light receiving element 16 are arranged with the main scale 4 and the main scale 10 sandwiched therebetween.

In this case, the light emitting element 15 is attached to the light emitting element mounting portion U13E3 fixed to the short side of the L shape of the contact mounting member 13A.
Further, two light receiving elements 16 are fixed to each of the light receiving element mounting members 13G fixed to the long sides of the L-shape of the contactor mounting member 1'3A.

A scale surface, 1, which is the L-shaped inner surface of the contact mounting member 13A, that is, the first scanning reference surface of the main scale 10;
0A and the surface opposite the end surface 10B, which is a second scanning reference surface orthogonal to this scale surface, are sliding pieces 17 and 18 made of a resin with a low coefficient of friction such as polyacetal resin, respectively. are fixed, and these sliding pieces 17
．． 18 is brought into contact with the graduation surface 10A of the main scale 10 and the end surface 10B perpendicular to the graduation surface 10A by the urging force of the connecting means 12.

In such a configuration, one of the elongated case 1 and the detection mechanism 3 as the top of the moving part is attached to the object to be measured (second member), and the other elongated case 1 is attached to the machine bed ( Mounting surface 19 of first member) 19
When the object to be measured is moved while fixed at A and 19'B, a bright and dark striped pattern is generated between the graduations of the main scale 10 and the index scale 14, and this striped pattern is read by the light receiving element 16. The device reads the amount of movement of the object to be measured and performs measurements.

In such a displacement measuring device, the main scale 1
The gap, parallelism, etc. between 0 and the index scale 14 have a very serious effect on measurement accuracy.

For this reason, conventional displacement measuring devices of this type require post-manufacturing adjustment,
After the inspection, the elongated case 1 and the detection mechanism 3 are fastened and fixed with a fixture before shipping, so that the relative positions of the main scale 10 and the index scale 14 do not shift during transportation.

When installing this displacement measuring device to a machine tool, etc., attach the elongated case 1 and the detection mechanism 3 to the movable parts of the machine tool, etc. while keeping the elongated case 1 and the detection mechanism 3 fixed with the fixtures.

They are attached to each foot.

Here, in general, the relative positional relationship between the fixed part and the movable part of a machine tool etc. almost never matches the relative positional relationship between the elongated case 1 and the detection mechanism 3 in the fixed state, and the positional relationship between the two is 2. Generally, there is a dimensional or three-dimensional shift.

For this reason, in the past, when attaching the fixed elongated case 1 and the detection mechanism 3 to the movable and fixed parts of a machine tool, etc., it was necessary to adjust the level, twist, etc. in order to match the surface. In addition to requiring a great deal of effort, the relative positional relationship between the elongated case 1 and the detection mechanism 3 must be firmly maintained after installation, which poses a major problem in terms of work and accuracy. was there.

This invention has been made in view of the above conventional problems, and the two sensing bodies in the displacement measuring device as described above can be easily and quickly attached to a movable part and a fixed part of a machine tool, etc. The present invention is characterized by providing a mounting device for a displacement side and a window device that can be mounted without impairing the accuracy between the displacement side and the window device.

This invention includes a first sensing body attached to a first member, and a second sensing body attached to a second member and capable of reciprocating along the first sensing body together with the second member. , a displacement measuring device configured to measure the relative displacement of the first and second portions from the relative movement of the first sensing body and the second sensing body. Second
In a mounting device for a displacement measuring device for mounting on a member, the central axis is disposed in a direction perpendicular to the direction of relative movement of the 14th $L knowing body and the second sensing body, and spherical seats are provided at both ends in the axial direction. a bushing that is integral with the second sensing body and that can be expanded in diameter and is fitted in one direction of the axis into a holding member that holds the second sensing body; and a spherical seat of this bushing on the second member side. The mounting of the spherical shaft part 1 and the second member is fitted with a guide member and a spherical shaft part that is fitted into the other spherical seat. a bolt whose tip is screwed into the second member by passing through the bushing, the guiding member having the spherical shaft portion fitted into the spherical seat of the bushing, and the pressing piece;
The bolt tightens the bushing in the axial direction via the two spherical shaft parts, and the holding member and the second sensing body integrated therewith are fastened to the second sensor via the bushing. The above purpose is achieved by fixing it to the month.

(1) The present invention achieves the above object by making the mounting surface of the second member and the engaging surface of the guide member flat in the mounting device for a displacement measuring device.

Further, in the mounting device for a displacement measuring device, the mounting position of the guide member can be adjusted within a certain range within a plane perpendicular to the bush center axis with respect to the mounting surface of the second member. As such, the above two objectives are achieved.

Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, the same or equivalent parts as those of the conventional displacement measuring device shown in FIG. 1 will be designated by the same reference numerals as in FIG. 1, and a description thereof will be omitted.

This example. includes a first sensing body 22 attached to the first member 21 and a second sensing body attached to the second member 2123 and capable of reciprocating along the first sensing body 22 together with the second member 23. body 24, etc., and the displacement of the first and second members 21, 22 is measured from the relative movement between the first sensing body 22 and the M2 sensing body 24. In a displacement measuring device mounting device for mounting a measuring device to the first member 21 and the second part (22nd part), the central axis 25A is connected to the first sensing body 22 and the second part (22nd part).
It is arranged in a direction perpendicular to the relative movement direction of the sensing body 24, has spherical seats 26 and 27 formed at both ends in the axial direction, and is integral with the second sensing body 24,
A bushing 25 that can be expanded in diameter is fitted in the axial direction to a holding member 28 that holds the bushing, a spherical shaft portion 30A that is fitted into a spherical seat 26 on the second member 23 side of the bushing 25, and The attachment of the member 23 is carried out using a guide member 30 having an engaging surface 3/OB that is engaged with the surface 23A, and the other spherical seat 2.
7, the bushing 25, and the spherical seat 26 of the bushing 25.
The guide member 30 includes the spherical shaft portions 30A and 31A that are fitted in the spherical shaft portions 27, and a bolt 32 that passes through the pressing piece 31 and whose tip is screwed into the second member 23,
By the bolt 32, the two spherical shaft portions 30A, 31
The bushing 25 is tightened in the axial direction through the bushing 25, and the holding member 28 and the second sensing body 24, which is integrated with the bushing 25, are fixed to the second member 23 through the bushing 25. be.

The mounting surface 23A of the second member 23 and the engagement surface 30B of the guide member 30 are planes perpendicular to the central axis 25A of the bushing 25.

The guide member 30 is fixed to the second member 23 by screwing a bolt 30D passing through a bolt through hole 30G formed in the guide member 30 into the mounting surface 23A of the second member 23. There is.

The inner diameter of the bolt through hole 30G is larger than the outer diameter of the bolt 30D, so that the guide member 30 can be attached to the mounting surface 23A of the second member 23.
The mounting position can be adjusted within a certain range within a plane orthogonal to the bush center axis 25A.

Reference numeral 25B shown in FIGS. 2 and 3 indicates a slit formed parallel to the central axis 25A of the bushing 25, which allows the bushing 25 to expand in diameter. Further, reference numeral 33 in the figure indicates a bolt for fixing the elongated case 34 that supports the first sensing body 22 to the first member 21.

Next, the operation of the above embodiment will be explained.

First, the first sensing body 22 is fixed to the first member 21 with the bolt 33 while the first sensing body 22 and the second sensing body 24 are kept fixed (fixing device not shown).

Next, with the bolt 32 loosened in advance, the guide member 3
0 to bolt 30. Due to D, the second member 23 is attached to the surface 2.
Fix it to 3A.

At this time, the inner diameter of the bolt through hole 30C of the guide member 30, through which the bolt 30D passes, is six times larger than the outer diameter of the bolt 30D, so that the guide member 30 is fixed to the mounting surface 23A within the gap between the two. The mounting position can be adjusted.

That is, the mounting position of the second member 23 of the first sensing member 22 and the second sensing body 24, which are fixed to each other, relative to the surface 23A can be finely adjusted in a direction perpendicular to the central axis 25A of the bushing 25. .

Next, with the guide member 30 attached to the surface 23A for mounting the second member 23, the bolt 32 is screwed into the surface 23A for mounting the second member 23.

At this time, the pusher 12-5 is movable with respect to the holding member 28 along the central axis 25A.
The position of the bushing 25 relative to the holding member 28 in the A direction is adjusted.

Further tightening of the bolt 32 causes the bushing 25 to snap into its spherical shank portions 30A and 31A which engage its spherical seats 26.27.
The diameter is enlarged by the holding part ttA28, and the second member 23 is firmly fixed via the spherical shaft parts 30A, 31'A and the bolt 32.
Become.

Here, when the bolt 32 is tightened, the bushing 25 expands in diameter, but since the diameter is expanded by an equal amount around the central axis 25A, by tightening the bolt 32, the second member of the holding member 28 23, central axis 25A
The position in the direction perpendicular to the direction does not shift.

In this way, after tightening and fixing the first sensing body 22 and the second sensing body 24 to the first member 211 and the second member 23,
The tightening tool fixing the first detection body 22 and the second detection body 24 is removed.

Furthermore, when tightening the bolt 32, the mounting of the second member 23 can be performed even if the position of the holding member 28 relative to the surface 23 is unbalanced. 27 and the spherical shafts 30A and 31A, and the first sensing body 22 and the second sensing body 24 are kept fixed by the fixing device, and the unbalance between them is eliminated. The first without causing stress based on
It can be attached to member 21 and second member 23.

Note that in the above embodiment, the bolt through hole 3C of the guide member 30
)C is a so-called blind hole, and a gap is provided between it and the outer diameter of the bolt 30D, so that the mounting position of the guide member 30 can be adjusted, but the present invention is not limited to this. The spherical seat 26, 27 and the spherical shaft 3
The bolt through hole 30C does not necessarily have to be a blank hole as long as the unbalance can be absorbed by the relative displacement between the bolt through hole 30C and the bolt through hole 30C.

Further, in the above embodiment, the second member 23 is attached so that the surface 23A is a flat surface, but the present invention is not limited to this, and may be a spherical surface, an inclined surface, or the like.

Since the present invention is configured as described above, when attaching the displacement measuring device to the first member and the second member, the first and second sensing bodies are fixed while the first sensing body and the second sensing body are fixed.
The positional alignment of the sensing body can be automatically performed, which has the excellent effect of facilitating and speeding up the installation work and preventing errors later in the installation.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the installation state of a conventional displacement measuring device.
FIG. 2 is a cross-sectional view showing an embodiment of the mounting device for a displacement measuring device according to the present invention, and FIG. 3 is a cross-sectional view taken along the line ■-■ in FIG. 21... First member, 22... First sensing body, 23... Second member, 24... Second sensing body, 25... Bush, 26.27... Spherical seat, 28 ...Holding part'4O, 30...Guide part (A, 30Δ...Spherical shaft part, 30'B...Engaging surface, 31...Suppression piece, 30D, 32.33...・Bolt. Agent Keisuke Matsuyama (and 1 other person)

Claims (3)

[Claims] (1) a first sensing body attached to the first member; a second sensing body attached to the second member and capable of reciprocating along the first sensing body together with the second member; and a displacement measuring device configured to measure the relative displacement of the first and second members from the relative movement between the first and second sensing bodies. In a mounting device for a displacement measuring device for mounting on two members, the central axis is arranged in a direction perpendicular to the relative movement direction of the first sensing body and the second sensing body, and spherical seats are provided at both axial ends. is formed, and is integral with the second sensing body, and is fitted in the axial direction to a holding member that holds the bushing, and is expandable in diameter; and a spherical seat of the bushing on the second member side. a guide member fitted with an engaging surface that engages the mounting surface of the spherical shaft portion and the second portion;
a pressing piece having a spherical shank that fits into the other spherical seat; a guide member comprising the bushing and a sheared spherical shank that fits into the spherical seat of the bushing; , the tip is screwed into the second member. and a bolt, which tightens the bushing in the axial direction via the two spherical shaft parts, and via the bushing,
A mounting device for a displacement detection device, characterized in that the holding member and the second sensing body integrated therewith are fixed to the second member. (2) The mounting device for a displacement measuring device according to claim 1, wherein the mounting surface of the second member and the engaging surface of the guide member are flat surfaces. (3) The mounting position of the guide member is adjustable within a certain range within a plane perpendicular to the bush center axis with respect to the mounting surface of the second member. A mounting device for a displacement measuring device according to item 1 or 2.