JPS62184307A - Dimension measuring instrument for cylindrical object - Google Patents

Abstract

PURPOSE:To prevent trouble that a difference takes place on a measured result by adjusting an interval between reference rollers so that the panes passing through a cylinder axis of an object to be measured and the central axes of the reference rollers are paralleled to the plate surface of surface plates and fixing roller bearings on the position under a stably supported state. CONSTITUTION:When the planes passing through the cylinder axis of the object A to be measured which is mounted stably so as to insert into a gap part between two reference rollers 1 and 2 and the central axes of the reference rollers are denoted as (a) or (b), in order to maintain the measuring tip part center of the probe 103 or 203 at the position to coincide with the plane (a), the surface plates 21 and 22 are inclined with respect to the horizontal plane respectively and fitted to each frame 23 or 24 so that the plate surface of the surface plate 21 or 22 is paralleled to the plane (a) or (b). When a contact condition between the object A and the probe 103 is set, the object A stands still accurately at all times at the prescribed position by merely inserting the object A between two reference rollers 1 and 2.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention is capable of easily and accurately measuring the outer diameter, inner diameter, roundness, or inner wall thickness of an object to be measured that is at least partially cylindrical or cylindrical in the process of forming the object. The present invention relates to a dimension measuring device for measuring. [Prior Art] In cutting factories for machine parts, dial gauges have generally been used when it is desired to check the accuracy of the finished dimensions of a workpiece that is being machined to within 1/100 mm. (Problems to be solved by the invention) If the object to be measured is a plate-shaped object,
At first, measurements can be made relatively easily and with high accuracy using a dial gauge, but in the case of cylindrical objects, even if you prepare a special 81 measurement gauge, it is quite a hassle. In addition, depending on your measurement proficiency, it may take a while ((
- It is likely to cause measurement errors that are difficult to see. The measurement operation of the present invention is simple and can be carried out by an unskilled person.
It is an object of the present invention to provide a measuring device suitable for production sites, which can measure the dimensions of a cylindrical object easily and with high viscosity. [Means for Solving the Problems] In order to achieve the above object, the dimension measuring device for a cylindrical object according to the present invention includes a first reference roller and a second reference roller that are rotatably opposed in parallel; means for adjusting the spacing between the pair of reference rollers; a cylinder axis of the cylindrical object to be measured coaxially supported between the first and second reference rollers; A surface plate for mounting a dimension measuring instrument, which is installed in a direction parallel to the plane so that the measuring tip can be moved along the plane connecting the one axis;
A dimension measuring instrument fixing means for fixing the 4th eye) 11 of the dimension measuring instrument to the 6th eye in contact with the measurement point of the cylindrical object to be measured which is in the supported state of item 11h; i
Ff Book 1 ilJ Nibi No. 2! , (a means for synchronously rotating the semi-rollers). Operate the interval adjustment means,
Under the condition that the cylindrical object to be measured J1 is stably supported coaxially between the pair of rollers, the plane passing through the axis of the cylinder of the object to be measured H1 and the center axis of the roller is defined. Adjust the spacing between the rollers so that they are parallel to the surface of the board,
Fix the roller bearing in that position. This interval is determined based on the desired outer diameter of the object to be measured and the outer diameter of the reference roller.
It can be easily obtained by calculation. Next, the model object, which has been correctly machined to a predetermined outer diameter, is placed coaxially between a pair of standards [1 and 2] to stably support it, and the height of the probe is adjusted to the measuring point ( Place the dimension measuring instrument on the surface plate, which is aligned in advance with the point where the above-mentioned plane intersects with the outer circumference of the object, and bring the measuring point toward the measuring point and bring it into contact. When the scale of the measuring instrument reaches a point where it oscillates somewhat beyond the predetermined allowable measurement error range, hold the dimension measuring instrument in this position and avoid fixing it on the surface plate, and check the dimension indication mark ( The preparation work before using the device is completed by adjusting the pointer) to the zero display position and removing the model object. To measure an object to be measured, it is sufficient to align the measuring point of the object with the tip of the measuring stylus of the measuring device and simply insert the tip between the pair of reference rollers. The dimensional display scale of the measuring instrument accurately displays the dimensional error of the measured object relative to the model object by λ1. Also, by measuring the outer diameter and inner diameter, the thickness of the cylindrical wall can be known, and by rotating a pair of reference rollers with their rotating means, the j'J lr of the cylindrical body can be determined.
You can check once. In addition to the above, when measuring the diametrical dimension of a cylindrical body, the device of the present invention allows the measuring element (contact element to the measuring point) of a measuring instrument such as a dial gauge to move forward and backward in the direction of the diameter of the cylindrical body. The positioning work during measurement, which used to be extremely time-consuming and difficult, to bring the measuring instrument into contact with the cylindrical object to be measured by aligning the direction correctly and making contact, is now easy for non-skilled people to do. Not only can this be done in a one-touch manner, but the inconvenience of differences in measurement results depending on the measurement person can be almost completely eliminated. Therefore, sufficiently reliable measurements can be made within the limits of the accuracy of the measuring instrument. [Embodiment 1] The apparatus of the present invention will be specifically explained below based on the embodiment shown in the attached drawings. FIGS. 1 to 4 are a front view, a top view, a side view, and an explanatory diagram of a measurement state of a cylindrical object, respectively, showing an example. 1 to the first group (roller, 2ti second t, 4 base 1] -
By applying precision finishing to a hard-marinated 11'5 metal rod, the outer diameter is maintained at a predetermined outer diameter with an accuracy of about micron IJ. 1a and 2a are the respective rotation axes of both 1] and 2a. Reference numeral 40 denotes a set of corner-shaped base members forming the chassis portion of the device, which are arranged horizontally and parallel to each other at a constant interval. 30 is installed on the base (rollers 1 and 2, and surface plates 21 and 22 for mounting dimension measuring instruments described later in 1) are placed in a positional relationship b in which they face each other, so that the spacing between the openings can be adjusted. At one end in the longitudinal direction of the bed 30, which has a rectangular plane, a first J, 4t%U roller 1 and a first surface plate 21 are attached (a fixed frame 23 for However, on the other end side, a movable stand 24 for mounting the second reference roller 2 and the second surface plate 22 is provided in dark blue.
3 and 24, as is clear from FIGS. 1 and 2, which are a front view and a side view of the device, a pair of side wall members opposed to each other in the +'+ii rear direction of the device are connected in an H-shape by a horizontal member. It has a similar overall shape. The upper edges of the side wall members of each of the pedestals 23 and 24 have an intersection angle θ of 120° (a V-shaped four-person shape). , a groove 27 for fitting the rotating shaft 1a of the first solid roller 1 is provided at the upper corner of the side (inside) of this pedestal 23 facing the other pedestal 24.
A wire 39 is passed in iii'+27 beside the rotating shaft 1at (in this case, the pressing part of the rotating shaft 1111a, in this case 11 between the two screws 38)
It is compressed and fixed by Further, on the V-shaped upper edges of both side wall members of the pedestal 23, a mounting circumference A821 for a dimension measuring instrument, such as a dial gauge, is attached by suitable fixing means so as to be fixed between the opposing slopes. (Also, this upper edge slope is provided with multiple screw holes 33 for fixing the dimension measuring instrument. The other frame 24 has the same or almost the same shape and structure as the frame 23. 28 is the second 1.L i%. This is a groove for fitting the rotating shaft 2a of the Lll-La.Fixing bolts 32 of the pedestal 24 are implanted or inserted into the bridging parallel member of the pedestal 24, and the bed 3
The elongated slit-shaped port l-insertion hole 30 provided at
With the bolts 32 passing through a, the pedestal 24 can be moved toward or away from the other pedestal 23 by sliding on the upper surface of the bed 30. 34 is the pedestal 24
This is a fastening nut for the poles 1 to 32, for fixing the poles 1 to 32 on the bed 30 at any position regardless of the direction in which it slides. 14 is an electric motor such as a servo motor that rotates the first and second reference rollers 1 and 2 synchronously, 15 is a reduction gear for the motor 14, and 16 is attached to the output shaft of the reduction gear 115. 1) Taboo It is. Reference numeral 12 denotes a relay rotating shaft for transmitting the rotational force of the Tanabata 14 to the two reference rollers 1 and 2, and is supported by a pair of bearings 11 attached to the base member 40 of the device. Relay rotation axis 1? The wave side pulley 13 is in the medium heat section.
is the axis! It is rotated by the end 14 via the endless bell 1-17 and the above-mentioned pulley 16. J: The drive side pulley 5 or the shaft is fitted to both parts of the relay circuit Q't' + shaft 12, respectively, and the 11th LIF
, 2flJ Rotation of semi-rollers 1 and 2 l1llll 1 a
a3 J: 211. One end bell 1-10 (1
By doing so, the two bases i1: r+-ra 1 and 2 are rotated in the same direction in the same way. 9 is a pulley for adjusting the endless belt 10, 8 is a tension pulley, and 6 is a movable pulley for adjusting the tension of the endless belt 10 in response to the movement of the movable frame 24, which is attached to the frame 23J3. Slab 1-25 provided in the lower part of both side wall members of 24
Alternatively, the rotating shaft 6a can be inserted into the suit 26 and the suit 1 can be freely moved. 29 is the rotating shaft 6a
This is a fixing put for the movable pulley 6 that is screwed into a screw groove provided in the. In FIG. 4, which is an explanatory diagram of the dimensions used in the apparatus according to the first embodiment, numeral 8 indicates a cylindrical cut object to be measured, and two objects are placed parallel to each other. of l tI
It is stably placed so as to be sandwiched between the FO rollers 1 and 2. B, J, and C are surface plates 21 or 2, respectively.
This is a gui-ful gauge for measuring the inner diameter, outer diameter, cylindrical wall, or cylindrical edge of the object to be measured by placing it on the holder 2. . 100J and 200 are the main body parts of the die full gauge,
101 and 201 (yo gauge base block, 102
202 is a stand that supports the gauge body in a vertically movable manner, and 103 and 203 are measuring points that come into contact with the point to be measured. Also, E is a stand for improving the sub-side sensitivity of the dial gauge B or C. It is a lever-type 31 scale 1J1 magnifier, and has 5
1 is the wooden cup as a lever, 52 is the fulcrum of the lever, 53 is j
54 is a force point on the other end of A T151 for contacting the measuring point of a 1-method measuring instrument such as a dial gauge. hand,
A circular hole is provided so that the contact position of the center of the probe can be determined correctly. 55 is a base block, and 56 is a stand on which a lever rotation shaft serving as a fulcrum is mounted. 301
and 302 are measuring points of another dial gauge (not shown) for measuring the wall thickness of the object A to be measured. Next, the method of operating the apparatus according to the embodiment described in -F will be explained with reference to the accompanying drawings. First, to explain the principle of method 7 of accurately measuring the outer diameter, inner diameter, wall thickness, or roundness of a cylindrical body using this device, we will explain the principle of method 7, which uses this device to accurately measure the outer diameter, inner diameter, wall thickness, or roundness of a cylindrical body. Let a or b be the plane that passes through the cylinder axis of the object to be measured Δ, η1, which is stably placed between the space f and the center axis of either reference roller 1 or 2. (See Figure 4)
, the base block 101 or 201 is placed on the surface plate 21 or 22 and can be moved freely on the surface plate.
No matter what position the Nor gauge B or C occupies, the surface plate 21 or 22 is used to keep the center of the measuring tip 51 of the gauge stylus 103 or 203 at a position that coincides with the above-mentioned plane a. The surface plates 21 and 22 are attached to the respective frames 23 and 24 at an angle with respect to the horizontal plane so that the surface of the plate is parallel to the plane a or b. The measuring head 103 satisfies the above setting condition ↑1! In order to be able to move while moving while moving, the distance between rollers 1 and 2 determined by the diameter of object A, etc., and the height 1-1 from the plate surface of surface plate 21 to the center of the tip of contact point 103, as described later. J3 may be fixed so that it is maintained at a specific value determined by the method used. If such a contact condition between the object Δ and the contact point 103 is set, the object A can be simply sandwiched between the two reference rollers 1 and 2, and the object A can be easily moved and difficult to stand still. A is always kept exactly stationary at a predetermined position on the device. And the dial gauge B is in front of the measuring point 103.
c! The J+ direction can always be aligned diametrically to the object. Therefore, when a base object finished with the correct dimensions is placed on this device, the finger t1 of the dial gauge B should be aligned with the 0 position on the gauge scale in advance.

[Zuba: How much X1 law error does object A have with respect to the reference/1 law object?
Alternatively, the degree of use of the object Δ can be measured extremely easily, quickly, and precisely. To explain specifically how to operate the device 9, first, measure the outer diameter of the object to be measured ('('r-11E%), then move the t roller to the first standard roller 1 and the second base. 2. In order to bring the device δ into a state where the above-mentioned setting condition ('1) is satisfied by adjusting the interval W between the two, loosen the fixing bolts and the puts 32 and 34 of the movable frame 24 and adjust the interval W between the predetermined intervals W. After moving the frame 24 to a position where it matches accurately, the pedestal 24 is fastened and fixed again on the bed 30.The value of W that can satisfy the above setting condition fl is determined by the diameter of the semi-dimensional object and the first Based on the diameter of the second reference rollers 1 and 2, the angle 0
It can be easily obtained using a calculation formula using trigonometric functions. In this example, the diameter of rollers 1 and 2 is 34.0
Processed to an accuracy of 00±01003mm. Prior to moving the movable pedestal 24, the fixing nut 34 of the rotating shaft 6a of the tension pulley 6 is loosened in advance, and the left and right assembly is set so that an appropriate tension is applied to the endless belt 10 after the pedestal 24 has finished moving. tension pulley 6
Select desirable fixing positions evenly in the left and right direction. A set of tension pulleys 6 on the back side of the device are also moved from their fixed positions in the same manner. Next, when the dial gauge B as a dimension measuring device is placed on the surface plate 220, the tip of the measuring stylus 103 is placed at a height of Various methods are possible to adjust as shown in Fig. 5, one of which is shown in Fig. 5. 60 is a scale for positioning the tip height T1 of the measuring tip 103 of the dial gauge B. It has a shape in which one end of a m-long metal bar is bent downward by 90 degrees, and this bent part GO
A circular hole 61 into which the circular tip of the probe 103 is inserted is bored in a. 62 is a bolt for fixing the scale 60. How to use the school 60 (Place the school 60 on the inner slope of the upper edge of the fixed pedestal 23 so that its bent part GOa protrudes, and fix the scale using the Pol I hole 33 if necessary. After that, the die (full gauge main body 1
00, the dial gauge B is brought closer to the scale 60 while adjusting the height. After the tip of the probe 103 fits into the circular hole 61,
While paying attention to the movement of the finger 21 of the full gauge, as the dial gauge B is further advanced while finely adjusting the height position of the gauge head 103, the tip of the gauge head 103 is placed in the circular hole 61 in a coaxial positional relationship. The dial gauge body 10 will stop shaking when it is completely pushed into the dial gauge body 10 at this height position.
0 to its stand 102. Since the inner slope of the fixed frame 23 is parallel to the surface plate 22 attached to the outer slope of the movable frame 24, the distance from the bottom of the scale 60 to the center of the circular hole 61 (1 is the first standard) [1-If the dimension is set to be the same as the radius of radius 1, the height from the surface of surface plate 22 to the tip of probe 103 can easily be made to match 1lrj of 11 above.In this way, When the distance W between the pair of 74 t% rows 51 and 2 and the height 1'' of the dial gauge stylus 103 accurately match the set dimensions, the measuring device becomes ready for use. First, while slowly rotating the pair of reference rollers 1 and 2 by starting the roller drive motor 14,
A model object with the same shape and dimensions as the one measured object is connected to this pair of [1
- Place it gently between the two sides. Of course, it is necessary to carefully check whether there is any foreign matter attached to the roller or the object. If the object rotates smoothly and quietly, it is proven that there is an abnormality (an object is placed on the object, so the rotation will stop.Next, bring the dial gauge B close to the object and place the measuring point 103 at the 31 measuring points on the object. When the pointer of the gauge reaches a position where it can swing 1a by about 0.10 to 0.15, fix the dial gauge on the surface of the surface plate 22 at this position. If you align the pointer of the full gauge to the zero display mark of the gauge and remove the model object from the reference [1-RAE], all preparations for measuring the dimensions of the object to be measured are completed. .The method of using the device of the present invention in order to nick the dimensions of a machined part during cutting or grinding, or to measure the dimensions of a finished product, is as follows: Gently place the object to be measured between a pair of base 1% rollers 1 and 2 so that it swings toward the tip of the measuring head 1. At this time, temporarily avoid rotating rollers 1 and 2 as described above. This is the same as when placing a model object.Then, the pointer of dial gauge B determines whether the outer diameter of the object to be measured matches the reference dimension ([dimensions of one object], or how much -・] When reading the scale of the full gauge B on the die, if you keep rotating the standard D-ra 1 and 2 of the It can also be accurately and easily checked.If you use a data memory device to automatically record the runout of a full-gauge pointer on the die or an error reporting device, it can be used to improve process control and product quality. It can be useful for management, quality certification, etc. A separate dial gauge with a probe for measuring the inner diameter R1 of a cylindrical object attached to one surface plate 22 can be slid in the axial direction of the 1% qE rollers IJ3 and 2. If it is assembled into 1, it is possible to simultaneously measure the outside diameter, the inside diameter, and the wall thickness of the inside wall.This dial gauge for inside diameter measurement may be placed on the other constant FfA21. As shown in the figure, the lever-type measurement value magnifier E
If used in combination with dial gauge C or [Ma B, it is possible to perform \1 method measurement with a higher precision. In the above embodiment, the outer diameters of the pair of rollers 1 and 2 are 34,000±3 mm, respectively, and the opening degree O1 of the ■-shaped notch on the edge of the r bases 23 and 24 is 34,000±3 mm. The intersection angle of both surface plates 21 and 22 is 120°.
However, these values can be changed as appropriate depending on the outer diameter of the cylindrical object and the required dimensional accuracy. One of the factors that raises the measured viscosity of the device 1 of the present invention to a sufficiently high level of 1 liter of water is the support 1 for the rotating shafts 1a and 2a of the G and L reference rollers 1 and σ2. ．． It is in +1 dimension. Normally, rotating objects use bearings to support their rotating shafts.
Due to the structure of the bearing, it is almost impossible to completely eliminate the play caused by rotational force (1). However, this device
- Since the la rotations 1'1llaJj and 2a are supported by pressure contact at two or one point along the axial direction in grooves of an appropriate shape such as a square shape, a square shape, or a U shape, play due to rotational movement is avoided. Almost/υ can be brought close to zero. Further, in the above embodiment, a full gauge die is used as the dimension measuring instrument, but it is also possible to use an electronic pressure sensor type dimension measuring instrument or the like. FIG. 6 shows a schematic plan view of another embodiment of the device of the present invention. The feature of this device is that when the outer diameter or inner diameter of a cylindrical object to be examined is not uniform in the axial direction of the cylinder, b, a pair of 4.
'%t% In order to enable the already 11L h1 striation A1 to be firmly supported between the filled state 6 and the first Jj and the second base i%L rollers. Each of these is divided into two in the axial direction, and an appropriate interval G is maintained according to the dimensions of the object to be measured. 1B is the first base ((roller) divided into two parts, and 23B and 24[31 are the stands for each roller. 2A and 2B are the second lt%c rollers divided into two parts, and 23A and 248 are the racks f'? of each roller.The racks 23A and 23B are arranged on beds 30△0 so that the distance between the phases N can be adjusted as shown by the black arrows in the figure, as in the first embodiment. It has been removed in a suitable manner. Frames 24△ and 24B
is placed on another bed 30B in the same manner. These two beds 30A and 3QB are indicated by white arrows in the figure, respectively, in order to increase or decrease the width between the two divided reference rows 51 and 2 according to the dimensions of the liquid crystal 1 measurement object. The second beds 50A and 5 are movable in the direction
Each is mounted on the 0B. 7 and 8 are a front view and a side view showing an example of a specific configuration of the device according to the second embodiment, 35Δ and 35Δ, respectively.
B is an auxiliary pedestal for attaching the surface plate 21 to the fixed pedestal 23A or 233. 36A and 363 are similar auxiliary frames for the surface plate 22. 27AJ3 and 27B are the respective bearings of the first reference roller 1△ and 1B which are divided into two,
28A and 288 are bearings for the 214th sub-rollers 2A and 2B. 40 is the base part of the device, and the second bed 50Δ
A V-shaped pointed guide rail 51 is provided so that 50B and 50B can be accurately translated in parallel to the phase η. ! +
2 GA V, semi-low turn! Relay rotation shaft 12 for IIIJ
It is a spline-fitting type shaft holder that is separated in the axial direction and fitted with 1ffl in the axial direction. The other shrine names in the diagram are the same as those in the MO diary. 3. The method of handling the device of the second embodiment is not different from that of the first embodiment for fishing with fishing rods. The only outer diameter is -Ll; h
A cylindrical cover, 1 measurement object is measured at the bottom of the first 1% Qj o-la which is divided in the direction of the +hlI force direction, respectively, under the condition that the measurement conditions described above are satisfied. 1A and 1B and the second reference [1-ra 2Δ and 2B, in order to support them at four points as schematically depicted in FIG. If a plane passes through the axis of the rice cooker 1B and the cylindrical axis C of the object to be measured A supported between the two rollers, then the surface of the surface plate 22 will be exactly parallel to the plane. Then, based on the four formulas determined in advance as described above, the fixed position of the movable frame 24Δ is adjusted so that the distance between the rollers 1A and 2A strictly matches a predetermined value. Similarly, the axis lines of rollers 1B and 2B and the pair of U
A cylindrical cover is supported between the semi-rollers and has an outer diameter of 1j173 at the supporting point. 2. Align the cylinder 1111 line to the side object so that the surface of the surface plate 21 is correctly parallel to the plane a, etc.
The fixed position of the movable pedestal 24B is adjusted so that the distance between the wooden rollers 1B and 2B is closely set to a predetermined value of 1.1. In addition, in order to increase or decrease the support interval G in the direction 111b of the cylindrical measurement object A supported at four points in accordance with the size of the object, slide the bed 30B (or 30A) in the simple axis direction. If so. FIG. 9 shows another method for pressing the rotating shaft of the reference roller into its fitting groove in such a manner that backlash during rotation can be suppressed to a minimum. Rotating shaft 2 of reference roller 2 in Fig. 2
A is inserted into a V-shaped insertion groove 28B with an opening degree of 90° formed on the top of the pedestal 24, and a pole 1-Go for pressing the rotating shaft 2a into the insertion/exit 128B.
It is pressed by an inward conical slope formed on the head of the This pressing force exerted on the rotating shaft 2a can be finely adjusted by adjusting the tightness of the bolt/fastening nut 61. 24a [Protrusion 62, which is integrally formed on the first page of the mount frame 24 and has a bolt insertion hole, is a spring washer or a coil spring. . FIG. 10 shows yet another method for compressing the rotating shaft of the reference L1-L into its fitting groove. Reference numeral 70 denotes a lever-shaped four-rotation shaft pressing member that can rotate around a rotation shaft 71, and the rotation shaft 71 is connected to the base 2 of the reference roller.
Assemble it to the protruding part 24a provided at the 1n part of 4 ('J t)
It is being At the point of force of the pressing member 70 which is in the shape of an L,
Insertion holes 70 for ports 1 to 72 planted in the frame 24
1] is provided, and the other parts of the pressing part IJ70 are fitted by the spring action force of a spring washer 74 or a coil spring, which is fitted over the bolt 72 at the mouth and has an IQ shape that presses the force point of the pressing member 70 from below. The end portion 70a presses the rotary shaft 2a toward the insertion groove 288 thereof. This pressing force can be adjusted by turning the pressing member locking pull 1-73 screwed onto the bolt 72, and applies a force to the pressing member 70 that presses the rotating shaft 2a. The mechanism for this can be changed in various settings. FIG. 11 is a side view showing another shape of the reference roller 1 or 2, in which the v and ts rollers 80 have their outer diameters gradually tapered in different steps in the axial direction. Therefore, it is possible to considerably omit the above-mentioned rather complicated work of adjusting the interval between the reference rollers of the base 1 each time the outer diameter of the cylindrical object 81 differs. When trying to produce different types of cylindrical objects to be measured, make sure that the desired roller spacing corresponding to the outer diameter of each object is maintained.
The base! 1! The roller 87 has portions 82 with different outer diameters.
If 83.84.85 is formed, shadow! This eliminates the need to adjust the roller spacing for different measurement objects. In addition, the portion 81 with a particularly increased outer diameter can serve as a stop for positioning the object in the axial direction. Alternatively, the narrow outer diameter portions 83, 85 can also function as escape spaces for the protrusions of objects when objects of different diameters are placed on the rollers. and in this case 83 and 85
Since it is not necessary to precisely finish the outer diameter of the roller, the manufacturing cost of the roller can be reduced to about 1J. FIG. 12 shows yet another shape of the reference roller.
A part 91 whose outer diameter has been precisely finished according to the desired ' [An economical effect can be obtained in that the lees density adding portion (11), which increases the cost significantly, can be reduced to a large [1] compared to the size of the roller 90. This helps to keep the surface of the 90 clean and free of foreign matter.In addition to reducing the surface area that needs to be kept clean, it also reduces the generation of static electricity. It is possible to take convenient measures such as forcing minute dust that is difficult to remove into the concave fM.

[Brief explanation of drawings]

Figures 1 to 5 all show the first embodiment.
Fig. 1 is a front view, Fig. 2 is a plan view, Fig. 3 is a side view, Fig. 4 is an explanatory diagram of the situation in which J1 measurement is being carried out, and Fig. 5 is an illustration of the measurement f of the dimension measuring instrument. Fixed? t) is an explanatory diagram of the situation in which the work of determining the height position at 1-43 is performed at step 1-). FIG. 6 is a schematic plan view of the second embodiment. 3rd 7th
Figures 9 and 8 are a front view and a side view of the second embodiment of the device (8j: 1, 1). Figures 9 and 10 are respectively 3; FIG. 11 is a partial side view and a partial plan view illustrating two different methods for press-contacting the rotating shaft of Ql, a-ra into its fitting groove and supporting it under the condition 1. and FIG. 12 show the above embodiment and LL', respectively.
/! FIG. In the diagram 1...1st station i%j roller 2...2nd
v,, 111. Roller 10.15...Endless belt for rotation of rollers 1 and 2 and E-tater 21.22...Surface plate 23...[1-Fixed frame of roller 1 24...Movable frame of roller 2 27 .28...Roller bearing part 30.
... Bed 30a ... Bolt insertion hole in the shape of sleeve 1 △ ... Object to be measured B, C ... Dimension measuring device (dial gauge)

Claims (1)

[Scope of Claims] 1) (a) A first reference roller and a second reference roller that are rotatably arranged in parallel to each other; (b) means for adjusting the spacing between the pair of reference rollers; (c) a cylindrical axis of a cylindrical object to be measured coaxially supported between the first and second reference rollers;
(d) a surface plate for mounting a dimension measuring device installed in a direction parallel to the plane so that the measuring head can be moved along the plane connecting one axis of the reference roller; and (d) the dimension measuring device. (e) a dimension measuring instrument fixing means for fixing a measuring point of the instrument in a state in which it is in contact with a measurement point of the cylindrical object to be measured in the supported state; 1. An apparatus for measuring dimensions of a cylindrical object, comprising: means for synchronously rotating two reference rollers. 2) The dimension measuring device for a cylindrical object according to claim 1, wherein the dimension measuring device is a dial gauge.