JPH095004A - Calipers - Google Patents

Abstract

PURPOSE: To provide a pair of calipers having a claw part capable of being set at the same position of an object to be measured even if measurement of the object is repeated many times by arranging an object receiving base at a fixed jaw between the claw part of the fixed jaw and a measuring body, and forming on the receiving body a groove through which a movable jaw can be inserted from the side of the movable jaw to the inside of the claw part of the fixed jaw. CONSTITUTION: Through the provision of an object measuring receiving body 11, an object can be positioned in an abutting manner on the receiving body, and the position of a claw part 10 to be abutted is always set at a constant position. The receiving body 11 is extended from the fixed jaw 9 to a movable jaw 8 while the receiving base 11 has thereon a groove 13 extending from an end on the side of the fixed jaw 8 to the inside of the claw part 10 of the fixed jaw 10, and thereby the movable jaw 8 can enter the groove 13. Accordingly, the distance of the jaws 10, 10 can be shortened until they abut on each other, thereby, measurement of any short object can be measured without disturbance of the receiving body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caliper for precisely measuring the length of an object. In detail, when manufacturing a bearing race by cutting the steel pipe into slices, if the cut portion of the cut steel pipe is chamfered and an inclined end surface is provided,
The measurement position will be set on the slope. In this way, when the measuring point has the inclined end face as at least one end,
Since the measurement point is not determined for each measurement, it is difficult to universally measure the length of the cutting tube. The present invention relates to a caliper that can universally measure the length of an object having such an inclined end face as a measurement point.

[0002]

2. Description of the Related Art A caliper for precisely measuring the length of an object is, as shown in FIG. 5, a main scale 2 in which a measuring scale is engraved in mm.
And a movable measurement vernier 3 fitted around the main scale and movable on the main scale. The fixed jaw 9 extends at a right angle from one end of the main scale and the movable jaw extends at a right angle from the fixed jaw 9 side of the movable measurement vernier 3. The fixed jaw 9 and the movable jaw 8 are respectively provided with claws 10 and 10 facing the tip portions of the fixed jaw 9 and the movable jaw 8 for accurately pinching the object to be measured whose length is to be measured. The movable measuring vernier 3 used to have a vernier scale engraved on it, as its name suggests, to enable measurement up to a unit of 1/10 mm, but with the currently used calipers, the displacement caused by the movement of the movable vernier 3 Accurately measure up to a unit of 1/100 mm and digitally display the measurement result on the display panel 7 made of liquid crystal. The movable measuring vernier 3 has a set screw 4 and is fixed to the main scale 2. Further, the display board 7 has an ON switch 5 for setting an arbitrary starting point to a reference value of 0 mm and turning on the digital display and an OFF switch 6 for turning off the digital display.

In any case, the conventional caliper measures the object 2 to be measured between the fixed jaw 9 extending from the main scale 2 and the claws 10 and 10 of the movable jaw 8 extending from the movable measuring vernier 3.
The measurement was carried out by sandwiching 2. For this reason, if one end of the object to be measured 22 is the inclined end surface 23, the pawl 1
The measurement length X varies depending on the depth Y of the measured object at one end that abuts 0. That is, in FIG. 5, the measurement length X is determined by the size of the depth Y of the measured object, which indicates how deeply the measured object 22 is located inside the jaw.
5, the measurement length X increases as the depth Y increases. Therefore, when the one end is the inclined end face 23, the measured value is different for each measurement, and the measured value is further different if the measurer is different, and the correct measured value cannot be obtained.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems in the conventional calipers, and the snips of the calipers can be retained even if the measurement of the object to be measured is repeated many times and the measurer is different. It is to provide a caliper that can be set at the same measurement location on an object to be measured and can obtain the same measurement result.
Furthermore, it is another object of the present invention to provide a caliper that can freely change and set the depth for inserting an object to be measured between the fixed jaw and the movable jaw, and can display the set length of the depth.

[0005]

According to a first aspect of the present invention, there is provided a main scale, a movable vernier externally fitted to the main scale, and a tip portion extending in a direction perpendicular to the main scale. In a caliper consisting of a fixed jaw having a claw and a movable jaw extending from the movable vernier in parallel with the fixed jaw and having a claw at the tip, the caliper is movable in a direction perpendicular to the fixed jaw between the fixed jaw and the main scale. The caliper is characterized in that a measured object pedestal extending to the jaw side is provided, and a groove is formed in the measured object pedestal so that the movable jaw can be inserted from the movable jaw side end to the inside of the pawl of the fixed jaw.

According to a second aspect of the present invention, the object receiving base has a set screw slidable on the fixed jaw and fixed at an arbitrary set position of the fixed jaw.
It is a caliper of the means in.

According to a third aspect of the present invention, the object receiving base has a means for measuring and displaying the position of the fixed jaw from the pawl.

[0008]

The function of the present invention will be described. According to the present invention, the fixed jaw between the fixed jaw of the vernier caliper and the main scale is provided with the measured object pedestal extending from the fixed jaw to the movable jaw in a direction perpendicular to the fixed jaw. The object can be brought into contact with the pedestal for positioning, and the position of the pawl that comes into contact with the object to be measured is always a constant position. Therefore, even if the end of the measured object that contacts the pawl is an inclined end surface, the measured position of the measured object that enters between the pawls is always the same.

Although the object receiving base extends from the fixed jaw to the movable jaw in a direction perpendicular to the movable jaw, the object receiving base forms a groove extending from the movable jaw side end to the inside of the fixed jaw. Movable jaws can enter this groove. As a result, the distance between the claws can be shortened until the claws come into contact with each other, so that an object to be measured can be measured without disturbing the object to be measured, no matter how short the object to be measured.

Further, according to another aspect of the present invention, since the object receiving base can slide on the fixed jaw and can be fixed with the set screw, the object receiving base to be fixed to the fixed jaw according to the object to be measured. The mounting position can be set and fixed arbitrarily.

Further, according to another aspect of the present invention, the measured object cradle can measure and display the position on the fixed jaw of the measured object cradle that slides on the fixed jaw as the amount of displacement from the measuring end of the pawl. Therefore, by determining the displacement amount, it is possible to always measure at the same measurement point with the same object to be measured.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention will be described with reference to FIGS. FIG. 1 is a plan view schematically explaining one embodiment of the present invention, and FIG. 2 is a front view thereof. 1 is a caliper of the present invention,
2 is the main scale. 3 is fitted on the main scale and slides on the main scale,
The liquid crystal display means 7 has a means for measuring the amount of displacement due to sliding and digitally displays the amount of displacement as a measured value.
It is a conventional movable measurement vernier having. Reference numeral 4 is a set screw for fixing the movable measurement vernier 3 to the main scale, 5 is an ON switch for setting the starting point to 0 value and showing the measured value, and 6 is an OFF switch for canceling the display. 8
Is a movable jaw which is fixed to the end of the movable measuring vernier 3 and extends in the vertical direction with respect to the main scale, and a pawl 10 facing the end face of the object to be measured is provided at the tip of the movable jaw 8. A fixed jaw 9 is fixed to the tip of the main scale 2 and extends vertically.
Claw 10 facing the claw 10 of the movable jaw 8 at its tip
Is provided. Reference numeral 11 is an object receiving stand for abutting and positioning the object to be measured between the pawls 10 and 10 against the receiving table front end 12. A U-shaped groove 13 is formed in a U-shape from the cradle front end 12 in the main scale 2 direction and from the tip on the movable jaw 8 side to the inside of the pawl 10 of the fixed jaw 9, and the groove width of the U-shaped groove 13 is movable. The size is such that the jaw 8 can pass through the U-shaped groove 13 without any obstacle.

FIG. 3 is a schematic explanatory view showing a state in which the object 14 to be measured is set on the caliper 1 of FIGS. 1 and 2 for measurement. An object to be measured 14 in the same figure is a tubular body cut into slices, and a rear end 15 of the object to be measured, which is one end of the cut end, is vertical to the pipe outer peripheral surface 18, but is one end of the cut end. The front end 16 of the tubular object to be measured is generally vertical to the outer peripheral surface 18 of the pipe, but the periphery is completely chamfered to form the inclined surface 1.
It is 7. In the pipe shown in FIG. 3, in order to measure the length of the pipe, since the hole portion on the center side of the pipe cannot be measured because it is a space, the pipe wall portion between the pipe outer peripheral surface 18 and the pipe inner peripheral surface 19 cannot be measured. It is necessary to measure at. By the way, as shown in the conventional example of FIG. 5, when the portion that abuts the pawl 10 for measurement is inclined, the pawl depends on how deeply the object to be measured 22 is inserted between the pawls 10 and 10. 10, 10, the position of the measured object depth Y changes,
Therefore, the length between the pawls 10 and 10 to be measured, that is, the measurement length X is changed and is not constant. However, according to the present invention, the measured object 14 is brought into contact with the measured object receiving base 11 as shown in FIG. 3 for measurement. Therefore, if the set depth L in FIG. It can be measured without fluctuation. When the measured object 14 of FIG. 3 is a tube, and the true tube length is between the measured object rear side end 15 and the measured object front side end 16, the claw is positioned on the inclined surface 17. Then, it becomes a little shorter than the above true length,
Misalignment occurs. However, when a large amount of products always have the same amount of deviation, there is no support for measuring a large amount of products for standardization. Also, the true length can be obtained by obtaining and adding the amount of deviation.

FIG. 4 is a plan view schematically explaining another invention of the present invention. In the present invention, the object receiving base 11 can be moved between the pawl 10 of the fixed jaw 9 and the main scale 2, and can be fixed by the set screw 20 at an arbitrary set position. In this way, since the object receiving base 11 can be fixed to the fixed jaw 9 at any setting position, the measuring position can be appropriately determined according to the size of the object to be measured.

According to still another aspect of the present invention, in the object receiving base 11 described above that can be moved to the fixed jaw 9 and can be arbitrarily set, the set depth corresponding to the movable amount in the object receiving base 11 can be set. The set depth L is displayed on the display means 21 provided with a means for measuring L. Although not shown, the object receiving base 11 has an ON switch and an O for enabling display.
It has an FF switch. According to the present invention, the set depth L can be immediately read by the built-in means, and the measurement position can be efficiently set according to the size of the object to be measured.

[0016]

As described above, since the caliper of the present invention has the object-to-be-measured pedestal for receiving and contacting the object to be measured with the fixed jaw, the object-to-be-measured is brought into contact with the object-to-be-measured pedestal. If the measurement is performed by using the measurement object, there is no mistake in setting the location of the measurement point even if the measurement object is an inclined surface. Therefore,
The measurement value does not change for each measurement, and the same measurement result can be obtained even if the measurer changes. further,
Since the object pedestal is provided with a groove in which the movable jaw can move, an extremely short and small object can be measured without the object pedestal being in the way. Further, the caliper, which can be fixed to the fixed jaw by moving the object receiving base to the fixed jaw, can set the depth to the fixed jaw arbitrarily according to the size of the object to be measured. Therefore, it can be applied to objects of various sizes and is highly versatile. In addition, a caliper that further has a measurement display means of the depth setting position on the object receiving base,
It has an excellent effect such that the set position on the fixed jaw can be immediately determined.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a caliper of the present invention.

FIG. 2 is a schematic front view of a caliper of the present invention.

FIG. 3 is a schematic explanatory view in which an object to be measured is set on the caliper of the present invention.

FIG. 4 is a schematic plan view showing another embodiment of the caliper of the present invention.

FIG. 5 is a schematic plan view of a conventional caliper.

[Explanation of symbols]

 1 Caliper 2 Main scale 3 Movable measurement sub-scale 4 Screw stop 5 Display means 6 ON switch 7 OFF switch 8 Moving jaw 9 Fixed jaw 10 Pawl 11 Measured object cradle 12 Cradle front end 13 U-shaped groove 14 Measured object 15 Rear end of measured object 16 Front end of measured object 17 Inclined surface 18 Tubular measured object outer peripheral surface 19 Tubular measured object inner peripheral surface 20 Set screw 21 Display means 22 Measured object 23 Inclined end surface L Set depth X Measured length Y Object depth

Claims (3)

[Claims] 1. A main scale, a movable vernier externally fitted to the main scale, a fixed jaw extending at right angles from the main scale and having a pawl at its tip, and a movable jaw extending parallel to the fixed jaw from the movable vernier and having a pawl at its tip. In the caliper consisting of, the fixed jaw between the pawl of the fixed jaw and the main scale is provided with a measured object cradle extending in the direction perpendicular to the movable jaw from the fixed jaw,
The caliper is characterized in that a groove for allowing the movable jaw to be inserted is formed on the object receiving base from the movable jaw side end to the inside of the fixed jaw. 2. The caliper according to claim 1, wherein the object receiving base has a set screw slidable on the fixed jaw and fixed at an arbitrary setting position of the fixed jaw. 3. The caliper according to claim 2, wherein the object receiving base has means for measuring and displaying the position of the fixed jaw from the pawl.