JPH0352893B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for measuring the inner or outer diameter of a cylindrical object such as a cylinder liner or sleeve used in an internal combustion engine.

BACKGROUND ART A conventional measuring device will be explained using an outer diameter measuring device. The conventional measuring device includes an air float 21, a measuring table 22, and a model 23, as shown in FIGS. 3 to 5.
It is composed of three points. air float 2
The air of No. 1 is sent to the air blowing ports 22a and 22b of the measuring table 22 by two hoses 21a and 21b, and is sprayed onto the cylindrical object 24 whose circumference is to be measured, placed on the measuring table 22, and the back of the cylindrical object 24 to be measured. The circumference of the cylindrical object is measured by measuring the rise and fall of the air float due to pressure. Before measurement, the model 23 is placed on the measuring table 22 and calibrated.

Problems to be Solved by the Invention However, such conventional devices have the following problems.

(a) Since the measuring stand 22 is a measuring stand exclusively for one model, it becomes unusable if the dimensions of the product are changed. Additionally, a measuring stand was required for each product.

(b) Due to wear of the receiving part of the measuring table 22, the measuring table 2
2 becomes unusable.

(c) The measuring table 22 is a custom-made item for each product, so it takes several days to manufacture.

SUMMARY OF THE INVENTION In order to solve such problems, it is an object of the present invention to replace the conventional one-type measuring device with a measuring device capable of measuring multiple types, and to provide a measuring device that can be easily adjusted for measurement.

Means for Solving the Problems In order to achieve the above object, the measuring device of the present invention includes: a horizontal base; one or more probe mounts movably provided on the base; A fixed block fixed to the gauge head mount, and a fixed block mounted to each of the gauge head mounts, which are movable toward and away from each other in a direction orthogonal to the movable direction of the gauge head mount, and which face each other horizontally and are to be measured. a pair of air micrometer probes whose surfaces facing the object are vertical, and are provided below the space between the pair of probes and are movably attached to each of the fixed blocks via spacers; an attachment with a roller, the direction of movement of which is directed toward the midpoint of the pair of probes, and two roller attachments provided for each fixed block; The stopper is attached to the object and is capable of contacting the object to be measured from the horizontal direction.

Function In such a device, the probe mounting base is provided so that it can move in the axial direction of the cylindrical object to be measured, so even if the length of the cylindrical object to be measured changes, To cope with this, the fixed block is equipped with an attachment that can be moved in the height direction, and the gauge head is mounted on the gauge head mounting base so that it can be moved horizontally, so the diameter of the cylindrical object to be measured can be changed. I can handle that though. Therefore, one measuring device can measure cylindrical objects of different dimensions.

Furthermore, even if the part that contacts the cylindrical object to be measured becomes worn, it can be dealt with by replacing the attachment (roller), and there is no need to replace the entire measuring device, which is economical. In addition, only the replacement parts need to be changed, and a large number of manufacturing days are not required for manufacturing the parts.

Embodiments Below, preferred embodiments of the apparatus for measuring the circumference of a cylindrical object according to the present invention will be described with reference to the drawings.

1 and 2 show a circumferential diameter measuring device according to an embodiment of the present invention.

First, the longitudinally movable structure is constructed as follows. A guide roller receiver 2 is attached to the base 1. A measuring head mounting base 4 with a slide ball 3 is supported on the guide roller receiver 2 so as to be movable in the axial direction by sliding between the guide roller receiver 2 and the slide ball 3. In the illustrated example, three probe mounts 4 are provided. Each gauge head mount 4 is provided with a lock bolt 5 that can come into contact with and separate from the side surface of the base 1, and when the lock bolt 5 comes into contact with the base 1, the gauge head mount
is fixed to base 1.

Further, the vertically movable structure is configured as follows. The measuring head mounting base 4 has a fixed block 6 having symmetrical slopes 6a and 6b toward the center.
is fixed. A roller attachment 7 is attached to the fixed block 6 on symmetrical slopes 6a and 6b. A spacer 8 is interposed between the fixed block 6 and the attachment 7 with a roller, and by changing the thickness of the spacer 8, the height direction position of the attachment 7 with a roller is adjusted. The right side of Fig. 1 shows the case where the spacer 8 is used, and the left side shows the case where the spacer 8 is not used, but in reality, the left and right roller attachments 7 and the fixed block 6 are used.
A spacer 8 having the same thickness is interposed between them. The roller attachment 7 is provided with a lock bolt 9 that can freely come into contact with and separate from the side surface of the fixing block 6.
The roller attachment 7 is fixed to the fixed block 6 when the roller attachment 7 is brought into contact with the fixing block 6. The attachment 7 with a roller has a roller 7a, and a cylindrical object 10 whose circumference is to be measured is placed on the roller 7a. The roller 7a is rotatable relative to the main body of the roller attachment 7, and only the roller 7a portion is replaceable.

The diametric adjustment mechanism is constructed as follows.
The gauge heads 11 are mounted on the left and right upper ends of the gauge head mount 4 so as to be opposed to each other. The gauge head 11 is movable in the horizontal direction with respect to the gauge head mounting base 4,
Coarse movement means 12 and fine movement means 13 as movement adjustment mechanisms.
has. Lock bolts 14 and 15 are provided corresponding to the coarse movement means 12 and the fine movement means 13, respectively, so that the probe 11 can be fixed to the probe mounting base 4. A conventional air float (third
Air is sent from (shown in the figure).

The structure for adjusting the longitudinal direction of the cylindrical object to be measured is constructed as follows. A stopper 1 is attached to the fixed block 6 located at one end of the probe mounting base 4.
7 is attached, and one end of the cylindrical object 10 to be measured is brought into contact with the stopper 17 in the longitudinal direction. The stopper 17 is movable in the longitudinal direction and is fixed by a lock bolt 18.

The circumferential diameter of a cylindrical object to be measured, in the illustrated example, the outer circumferential diameter, is measured by the circumferential diameter measuring device configured as described above as follows.

First, the probe mounting base 4 is moved in the longitudinal direction on the base 1 according to the length of the cylindrical object 10 to be measured, and the lock bolt 6 is tightened at an appropriate position to place the cylindrical object 10 to be measured. Tighten to fix the probe mounting base 4 to the base 1. Also, the position of the stopper 17 is determined and fixed with the lock bolt 18. This allows measurement even if the length of the cylindrical object 10 to be measured changes.

Next, the height of the roller attachment 7 is adjusted in accordance with the diameter of the cylindrical object 10 to be measured. This is done by adjusting the thickness of the spacer 8. The axes of the left and right roller attachments 7 are always aligned with the cylindrical object 10 as shown in FIG.
towards the center of If the roller 7a is worn, replace it with a new one. Therefore, even if the diameter of the cylindrical object 10 to be measured changes, the height can be freely adjusted.

After the adjustment in the height direction is completed, the conventional model is placed on the roller 7a and the adjustment in the diameter direction is performed.
At this time, the coarse movement means 12 is pushed to bring the probe 11 into contact with the model, completing the coarse movement adjustment. In this state, air from the air float is injected into each probe 11. After injection, the probe 11 is finely adjusted by the fine adjustment means 13 according to the scale of the air float, and after the fine adjustment, the probe 11 is fixed to the probe mounting base 4 with lock bolts 14 and 15. Thereby, even if the diameter of the cylindrical object 10 to be measured changes, the position of the probe 11 in the diametrical direction can be freely adjusted.

After completing the adjustment, remove the model, place the cylindrical object 10 to be measured on the roller 7a with one end in contact with the stopper 17, and blow air from the air float to the left and right measuring points 11. Send it and measure the circumference using an air float.

In the above embodiment, the case of outer circumference measurement is shown, but if the probe mounting base, base, roller attachment, and probe are configured to fit inside the cylindrical object to be measured, the inner circumference can be measured. It is possible to measure the diameter.

Effect of the invention According to the present invention, the following effects can be obtained.

First, since it is adjustable in the longitudinal, height, and diameter directions, it is possible to adapt to changes in the shape and dimensions of the cylindrical object to be measured, making it possible to measure a wide variety of products. I can do it.

In addition, even if the part that comes into contact with the cylindrical object to be measured, such as a roller, wears out during repeated measurements, it can be dealt with by simply replacing the part in that part, which is inexpensive and limited by the number of production days. Not at all.

Furthermore, conventional air floats and models can be used, and the same measured values as conventional ones can be obtained.

[Brief explanation of drawings]

Fig. 1 is a front view of a device for measuring the circumference of a cylindrical object according to an embodiment of the present invention, Fig. 2 is a side view of the device shown in Fig. 1, and Fig. 3 is a conventional measuring device with a product receiving part. Figure 4 is a front view and perspective view showing the air float section as a perspective view; Figure 4 is a side view when the product is placed on the product receiving part in Figure 3; Figure 5 is a front view with a part cut away. is a side view of the model. 1...Base, 2...Guide roller holder, 3...
...Slide ball, 4...Measure head mounting base, 5,
9, 14, 15, 18...Rockvolt, 6...
Fixed block, 7... Attachment with roller, 7
a...Roller, 8...Spacer, 10...Cylindrical object to be measured, 11...Measuring head, 12...Coarse movement means, 13...Fine movement means, 16...Hose, 17...
...Stotsupa.

Claims (1)

[Scope of Claims] 1. A horizontal base, one or more gauge head mounting bases movably provided on the base, a fixing block fixed to each of the gauge head mounting bases, and each of the gauge head mounting bases. A pair of air micrometers mounted on a mounting base, capable of approaching and separating from each other in a direction perpendicular to the movable direction of the probe mounting base, facing horizontally, and having vertical surfaces facing the object to be measured. A measuring element is provided below the space between the pair of measuring elements, is movably attached to each of the fixed blocks via a spacer, and the direction of movement is directed toward the midpoint between the pair of measuring elements. , two attachments with rollers are provided for each fixed block, and are attached to one of the one or more probe mounts at one end, and are capable of contacting the object to be measured from the horizontal direction. A device for measuring the circumference of a cylindrical object, comprising: a stopper; and a stopper.