JP3213747U - Bending angle measuring device - Google Patents

Abstract

To provide a bending angle measuring device capable of easily and accurately measuring the angle of a bent workpiece. A bending angle measuring instrument is an angle measuring instrument for measuring a bending angle of a bent workpiece, and includes a body 12 having a gap formed between a front plate and a back plate, and orthogonal to a reference surface 31a. A rotating plate 21 having a main body portion 10 having an extending surface 13 projecting with an inclined surface having a constant angle α in the direction and a horizontal surface 21a and a vertical surface 21b is formed, and a measuring range is shifted to the rotating plate. A two-step scale 24 of an upper scale 24a and a lower scale 24b to be displayed is engraved, and a reference portion having a rotating portion attached to a rotating shaft 23 arranged at the end of the extension rod and a reference surface 31a that can be moved in parallel. It comprises a reference portion 30 with a member sandwiched therebetween. [Selection] Figure 1

Description

  The present invention relates to a bending angle measuring apparatus capable of measuring the angle of a workpiece bent into various forms by a bending machine.

In the measurement of the bent workpiece, as shown in FIG. 10, a measuring instrument called a protractor is frequently used as a simple angle measuring means that can be held and measured. The structure is such that a rotation axis (c) is placed at the center of a semicircular protractor plate (b) with an angular scale (b), and an indicator needle (e) is placed at the tip of the rotation axis (c). It is formed by pivotally mounting the disposed ridges (d).
In the measurement, the workpiece to be measured is sandwiched between the bottom side of the protractor plate (a) and the contact side of the collar (d), and the base of the protractor plate (a) is placed on one side of the workpiece. After the contact, the heel (d) is rotated and brought into contact with the other side of the work, and the work is kept in close contact with the bottom of the protractor plate (b) and the abutment side of the heel (d). On the other hand, the operation of quickly reading the scale (b) swayed on the protractor plate (b) is included. Here, the fact that the workpiece and the bottom side of the protractor plate (A) and the contact side of the collar (A) are in close contact with each other means that the rotation axis (C) and the apex portion of the workpiece to be measured are bent. Is the state where the closest position is reached and the posture is maintained as it is, and accurate measurement is possible in this state.
However, in the above-mentioned protractor, the position of the rotation axis (c) and the top of the work is actually only a few millimeters apart, and the bottom of the protractor plate (a) When the heel (d) is rotated while being in contact with the side to be brought into contact with the other side of the work, the position of the heel (d) is close to the apex of the work and the posture thereof is accompanied by the rotational movement. It is extremely difficult to keep it.
In other words, when trying to bring the heel (d) into contact with one side of the workpiece, there is a shortage of rotation that does not lead to complete contact, leaving a slight gap, and in some cases, rotation of the contacted part once It becomes a contradiction that it becomes over and creates a slight gap, and maintaining a distance of several millimeters for a certain time is a difficult technique.
As a result, there is a drawback that the measurement does not lead to an accurate measurement but includes an error.
Further, the protractor has a measurement range of 0 ° to 180 ° on the semicircular protractor plate (A), and naturally the measurement range is 0 ° to 180 °. However, at an actual measurement site, the minimum value of the measurement angle of the workpiece W is not around 0 °, but often starts from about 15 ° to 30 ° slightly deviated therefrom. At this time, if the measurement range is fixed at 0 ° to 180 °, the measurement range of 0 ° to 180 ° is provided, but there is actually a contradiction that only a narrower range can be measured. It will be.

Utility Model Registration No. 3192863

  The present invention has been made in order to solve the above-mentioned problems. While maintaining a simple means of measuring the angle of a work piece by holding it in a hand, keeping a measuring instrument in close contact with each side of the work for a certain period of time. It is an object of the present invention to provide an angle measuring device that can measure and change the measurement range according to the actual measurement range.

  The bending angle measuring device according to claim 1, wherein the bending angle measuring device is in contact with a bent workpiece and measures the bending angle, and forms a slight gap between the front plate and the back plate and is gripped by hand. Equipped with a body that is capable of projecting an extension rod with an inclined surface at a certain angle from the upper part of the body in a direction perpendicular to the reference surface, and a vertical surface that intersects the horizontal plane at right angles with a main body part that has a bearing on the tip. A rotary plate is formed, and a circumferential scale of the rotary plate is engraved with two scales, an upper scale and a lower scale, which are displayed by shifting the measurement range in accordance with the inclination angle of the inclined surface. A rotating part that is pivotably mounted on the bearing and a reference part that sandwiches a reference member having a reference surface that is in contact with one side of the work and can be moved in parallel up and down between the front plate and the back plate. It is characterized by comprising.

  The bending angle measuring device according to claim 2, wherein the bending angle measuring device abuts against a bent workpiece and measures the bending angle, and forms a slight gap between the front plate and the back plate and is gripped by hand. A body that is capable of projecting, with an inclined surface projecting from the upper surface of the body in a direction orthogonal to the reference surface with a certain angle of inclination, and a bearing disposed at the tip of the projecting rod. Correspondingly, the main unit with two scales of upper and lower scales that display the measurement range by shifting the phase, a rotating plate with a horizontal plane and a vertical plane perpendicular to it, and an indication of the scale A reference is formed by forming a needle and rotating the rotary plate and the indicator needle to be rotatably attached to the bearing, and between the front plate and the back plate, abutting on one side of the workpiece and allowing vertical translation. A reference portion sandwiching a reference member having a surface, and That.

  The bending angle measuring device according to claim 3 is characterized in that the angle α of the extension rod is 15 ° to 45 °, preferably 30 °.

  According to a fourth aspect of the present invention, there is provided a bending angle measuring instrument in which a guide plate for urging the parallel movement of the reference member is disposed in the reference portion.

  The bending angle measuring instrument according to claim 5 is characterized in that a scale display window is formed on a part of the inclined surface of the extension rod.

  According to the bending angle measuring device according to claim 1 and claim 2, by forming the extension rod with the inclination angle α, it becomes possible to change the measurement range in a range corresponding to the extension rod, for example, Measurement in the range of 30 ° to 210 ° is possible. At the measurement site, the measurement range can be changed according to the change in the bending angle of the workpiece W, and the substantial measurement range can be expanded.

  Even during measurement, the reference surface of the reference member and the rotating shaft of the rotating plate face each other at a constant interval, and the rotating plate is kept in a stationary posture even when it is in close contact with the workpiece W during measurement. Therefore, more accurate measurement is possible.

  At the measurement site, it is possible to carry out simple measurement by holding the measuring instrument in hand, and it has light weight and simplicity.

  At this time, in the measuring device according to claim 1, it is possible to serve as both the protractor plate and the rotating plate by adding a scale to the rotating plate. In the measuring device according to claim 2, the body part The scale marked on can be read with an indicator needle.

  In the measuring apparatus according to the third aspect, by setting the angle α of the extended rod to 15 ° to 45 °, it can be adjusted to the actual workpiece measurement, and 30 ° is most desirable.

  In the measuring apparatus according to the fourth aspect, the vertical translation of the reference member can be facilitated by arranging the guide plate in the reference portion.

  In the measuring apparatus according to the fifth aspect, it is easy to read numerical values by forming a scale display window on a part of the inclined surface of the extension rod.

It is a front view of the 1st type of this plan bending angle measuring device. It is a side view same as the above. It is an exploded view same as the above. It is a front view of the 2nd type of this plan bending angle measuring device. It is a side view same as the above. It is an exploded view same as the above. It is a front view which shows the use condition of the 1st type of this plan bending angle measuring apparatus, (a) is a base point when it makes 30 degrees -120 degrees, (b) is an intermediate point of 90 degrees, (c) is 120 Indicates the end point when °. It is a front view which shows the use condition of the 1st type of this plan bending angle measuring apparatus, (d) is a base point when 120 degrees -210 degrees, (e) is an intermediate point of 180 degrees, (f) is 210 Indicates the end point when °. It is a front view which shows the use condition of the 2nd type of this plan bending angle measuring apparatus, (a) is a base point when it makes 30 degrees -120 degrees, (b) is an intermediate point of 90 degrees, (c) is 120 Indicates the end point when °. It is a front view which shows the conventional protractor.

  The outline of the first type of the proposed bending angle measuring apparatus is as shown in FIGS. 1 to 3, and can be gripped by the angle measuring device 1 that abuts against the bent workpiece W and measures the bending angle. A rotating plate having a body 12 and having a main body 10 in which an extending rod 13 protrudes from the upper part of the body with an inclined surface α at a certain angle in a direction orthogonal to the reference surface 31a, and a vertical surface 21b that intersects the horizontal surface 21a at a right angle. 21, and a rotatable rotating unit 20 in which two rotary plate scales 24, an upper scale 24 a and a lower scale 24 b, which shift and display the measurement range corresponding to the inclination angle α, are engraved, and the workpiece W And a reference portion 30 sandwiching a reference member 31 having a reference surface 31a that is in contact with one side and is movable in parallel up and down.

The main body 10 includes a body 12 having a grip 11, and the body 12 is formed by facing two plate bodies of a front plate 12 a and a back plate 12 b and sandwiching a spacer 12 c in a gap S therebetween.
An extension rod 13 is projected on the upper portion of the body 12 in a direction orthogonal to a reference surface 31a of a reference member 31 to be described later. The extension rod 13 is extended from the front extension rod 13a and the back surface in the same manner as described above. The output 13b faces each other, and a gap S is formed between them. The extension rod 13 is disposed in an inclined shape having an inclination angle α set based on a relative relationship with a scale 24 attached to the rotating plate 21 described later. A window 13c for reading the scale 24 swung on the rotary plate 21 is formed on the surface of the extension rod 13 on the front extension rod 13a side.
Furthermore, a bearing 13d for pivotally attaching the rotary plate 21 is engraved at the tip of the extension rod 13.

The rotating part 20 is in the relationship with the main body part 10 and has a rotating plate 21 sandwiched in a gap S formed between the front extending bar 13a and the back extending bar 13b. It becomes.
When the rotary plate 21 is not a semicircle but is a quarter circle obtained by further cutting it, and one side is a horizontal plane 21a, a vertical plane 21b that intersects with the plane is formed as the other side.
In addition, a rotary plate scale 24 having two stages of an upper scale 24a and a lower scale 24b for shifting and displaying the measurement range corresponding to the tilt angle α of the inclined surface is engraved on the circumferential portion.
At this time, the inclination angle α is an angle formed by the center line t of the extension rod 13 when the direction orthogonal to the reference surface 31a of the reference member 31 is a reference line k. And when this inclination | tilt angle is set to (alpha), the value attached | subjected to the rotary plate scale 24 of the rotary plate 21 first, the upper stage scale 24a is not the range of normal 0 degree-180 degrees, (0 degree + alpha)-( 90 ° + α). Next, the lower scale 24b is set to (90 ° + α) to (180 ° + α). For example, when the inclination angle α is 30 °, the upper scale 24a is swung from 30 ° to 120 °, and the lower scale 24b is swung from 120 ° to 210 °.
That is, when determining the measurement range of the workpiece W, an angle of the target range is assumed in advance, a minimum value of the assumed angle is determined, and the minimum value is used as the inclination angle α. Therefore, α = 30 ° is assumed when the minimum value is assumed to be 30 °.
When the inclination angle α is set, the measurement using the horizontal surface 21a of the rotating plate 21 starts from the inclination angle α, and when the rotating plate 21 rotates 90 ° (90 ° + α), the end point of the upper scale is reached. Measurement using the vertical surface 21b of the rotating plate 21 as a starting point starts at (90 ° + α), and reaches the end point of the lower scale when the rotating plate 21 rotates 90 ° (180 ° + α). When the value of α is changed, the same principle is used.

The reference portion 30 has a relationship with the main body portion 10 and sandwiches a reference member 31 that is also formed of a plate body in a gap S formed between the front plate 12a and the back plate 12b. It will be.
The reference member 31 is formed of a slide piece 31b that is sandwiched between the front plate 12a and the back plate 12b and moves between the front plate 12a and the back plate 12b, and a reference surface 31a that crosses and rises perpendicularly thereto. It abuts against one side of the workpiece W and functions as a score.
A spacer 12c is disposed between the front plate 12a and the back plate 12b to maintain a gap, and the rotating plate 21 and the reference member 31 are sandwiched in the gap.
When the measuring device is pressed against the workpiece W, the reference surface 31a of the reference member 31 is used as a contact surface to the workpiece W, and the reference member 31 can be slid up and down by the movement of the slide piece 31b to ensure contact. To do.

  The outline of the second type of the proposed bending angle measuring device is as shown in FIGS. 4 to 6, and can be gripped by the angle measuring device 1 that abuts against the bent workpiece W and measures the bending angle. The body 12 is provided, the extension rod 13 is projected from the upper part of the body with an inclined surface α at a certain angle in a direction orthogonal to the reference surface 31a, and the measurement range is shifted and displayed in accordance with the inclination angle of the inclined surface. Formed is a main body 10 in which two body scales 14 of an upper scale 14a and a lower scale 14b are engraved, a rotary plate 21 provided with a horizontal plane 21a and a vertical plane 21b perpendicular to the horizontal plane 21a, and an indicator needle 22 indicating the scale. Then, the rotary plate 21 and the indicator needle 22 are rotatably attached to the bearing 13d, and the top plate 12a and the back plate 12b are in contact with one side of the workpiece W so as to translate vertically. A free reference surface 31a Consisting reference portion 30 for the sandwiched the reference member 31.

The main body 10 includes a body 12 having a grip 11, and the body 12 is formed by facing two plate bodies of a front plate 12 a and a back plate 12 b and sandwiching a spacer 12 c in a gap S therebetween.
An extension rod 13 is projected on the upper portion of the body 12 in a direction orthogonal to a reference surface 31a of a reference member 31 to be described later. The extension rod 13 is connected to the front extension rod 13a and the back surface in the same manner as described above. The extension rods 13b face each other, and a gap S is formed between them. The extension rod 13 is disposed in an inclined shape having an inclination angle α set from a relative relationship with a rotary plate scale 24 attached to the rotary plate 21 described later.
Then, on the upper part of the body 12, a two-stage body scale 14 of an upper scale 14a and a lower scale 14b is engraved. First, the scale 14 assumes that the upper scale 14a is displayed by shifting the measurement range in correspondence with the inclination angle α of the extension rod 13. The principle is the same as the first type, and the range is (0 ° + α) to (90 ° + α) corresponding to the inclination angle α. The lower scale 14b is (90 ° + α) to (180 ° + α). For example, when the inclination angle α is 30 °, the upper scale 14a is swung from 30 ° to 120 °, and the lower scale 14b is swung from 120 ° to 210 °.

The rotating part 20 is in the relationship with the main body part 10, and a small rotating plate 21 is sandwiched in a gap S formed between the front extending rod 13a and the back extending rod 13b, and is pivotally attached to the bearing 13d. At the same time, an indicator needle 22 pointing to the body scale 14 attached to the body 12 of the main body 10 is attached to the outside of the bearing 13d.
That is, like the first type, the rotating plate 21 has a ¼ circle shape, and forms a vertical surface 21b whose one side is a horizontal surface 21a and the other side intersects at right angles. The rotating plate 21 and the indicator needle arranged on the outside of the bearing 13d are linked to each other, and the contact angle of the rotating plate 21 in contact with the workpiece W is reflected on the indicator needle 22. Form.

The reference portion 30 is the same as the first type, and is in a relationship with the main body portion 10 and is similarly a plate body in the gap S formed between the front plate 12a and the back plate 12b. The reference member 31 to be formed is sandwiched, and the reference member 31 is formed by a slide piece 31b and a reference surface 31a.
A guide plate 33 is disposed on the reference member 31 and is guided to the guide plate 33 so that the reference member 31 can slide up and down.

Next, the operation of the present angle measuring device and the effects based thereon will be described below.
First, in order to perform measurement using the first angle measuring device, the workpiece W is held in one hand, and the other measuring device is held in contact with each other.
Then, the measurement is started. First, in order from the one with the smallest measurement angle, for example, when measuring the measurement angle of about 30 °, as shown in FIG. One side is lightly pressed against the reference surface 31 a of the reference member 31. On the other hand, the rotating plate 21 uses the horizontal surface 21a, and the rotating plate 21 is brought into contact with the other side forming the measurement angle of the workpiece W with the workpiece W slightly inserted. At this time, if it is not necessary to use the slide piece 31 b of the reference member 31, the reference surface 31 a is kept in the vicinity of the upper side of the body portion 12 of the main body 10.
Then, when looking into the window 13c drilled in the extension rod 13, the reference edge of the window serves as an indication point, and the numerical value is read.

Next, when the angle of the workpiece W is increased to, for example, around 90 °, as shown in FIG. 7B, the horizontal surface 21a of the rotating plate 21 is applied to the reference surface 31a, and The numerical value is read by looking through the window 13c of the extension rod 13 by the same operation.
The same applies to the case of 120 °. As shown in FIG. 7C, the horizontal surface 21a of the rotating plate 21 is pressed against the reference surface 31a in an oblique direction, and the value of the window 13c is read.

When the measurement angle range exceeds 120 ° outside the range of 30 ° to 120 °, the vertical surface 21b of the rotating plate 21 is used this time, as shown in FIG. Against the vertical surface 21b of the rotating plate 21 and look into the window 13c.
Next, the angles are increased to 130 °, 140 °,..., And the end of the slide piece 31b of the reference member 31 is pushed up in the range up to 180 ° shown in FIG. Then, the slide piece 31b of the reference member 31 moves along the guide plate 33, and the reference surface 31a can be pushed up in a parallel state. And when it comes into contact with the vertical surface 21b of the rotating plate 21, the clamp 32 is turned to place the reference member 31 in a fixed state. The numerical value is read by looking through the window 13c in the fixed state.
When the angle is near the maximum 210 °, as shown in FIG. 8 (f), the reference member 31 is fixed to the clamp 32 in a state where the reference member 31 is pushed up to the maximum, and the vertical surface 21b of the rotating plate 21 is extended. Tilt it to a degree close to 13, and read the value.

The above describes the case where the first type measuring instrument is used, but in the second type, as shown in FIG. 9, the first type rotating plate 21 has a small size, The indicator needle 22 linked to this is added, and the rotary plate scale is converted into the body scale 14, and the upper scale 14a and the lower scale 14b are attached. The measurement can be performed by the same operation.
For example, FIG. 9A shows a case where the measurement angle is 30 °, FIG. 9B shows a case where the measurement angle is 90 °, and FIG. 9C shows a case where the measurement angle is 120 °. Even if it is 120 ° or more, measurement is possible in a range up to 210 °.

Now, in the above measurement, in the present measuring instrument, the reference member 31 of the reference portion 30 is applied to one of the workpieces W and fixed by the clamp 32 or the like, and the rotating plate 21 of the rotating portion 20 is brought into contact with the other. In this state, it is possible to read the value indicated by the window 13c or the indicator needle 22.
At this time, the rotation shaft 23 of the rotating plate 21 which is the other side with respect to the reference surface 31a of one reference member 31 is at the tip of the extension rod 13 and faces each other while maintaining a considerable distance. Become.
For example, if one of the workpieces is in contact with the reference surface 31a of the reference member 31 and the workpiece W is moved slightly, the workpiece that becomes the measurement angle can be used even if the rotating plate 21 may move greatly and cause a measurement error. The apex portion of W and the rotating shaft 23 of the rotating plate 21 are opposed to each other at a constant interval. Therefore, even if the workpiece W is pressed against the reference surface 31a side, the reference member 31 and the rotating plate 21 are mutually connected. Since the positions are orthogonal, the rotating plate 21 will not rotate any further, and the posture can be maintained as it is.

Based on the above operation, the present angle measuring device can change the measurement range within the range corresponding to the extension rod 13 by forming the extension rod 13 with the inclination angle α.
As a result, measurement is possible in the range of 30 ° to 210 °, for example, when the inclination angle α is 30 °, not the conventional fixed range of 0 to 180 °.
At the measurement site, the bending angle of the target workpiece W is not fixed and is usually changed. Therefore, the measurement range can be changed according to the change, and the substantial measurement range can be changed. It will have the effect of spreading.

Even in the measurement, even when the reference surface 31a of the reference member 31 and the rotating shaft 23 of the rotating plate 21 face each other with a certain distance and are in close contact with the workpiece W during the measurement, the rotating plate 21 remains stationary. The posture can be maintained, and a close state can be maintained to enable accurate measurement.
In addition, the slidable reference member 31 can cope with a close state in accordance with the measurement angle, contributing to the accurate measurement.

  The measurement range can be changed according to the field, and more accurate and precise measurement can be realized. In addition, the proposed measuring instrument has light weight and simplicity that can be easily held by hand. Is.

  As described above, according to the present invention, it is possible to provide a measuring instrument that can be expanded with a practical measurement range accompanying a change in the measurement range and can perform accurate measurement with higher accuracy and has simplicity.

10 Body
11 Grip 12 Body 12a Front plate
12b Back plate 12c Spacer 13 Extension rod
13a Front extension
13b Back extension rod 13c Window 13d Bearing 14 Body scale
14a Upper scale 14b Lower scale 20 Rotating part 21 Rotating plate 21a Horizontal surface 21b Vertical surface 22 Support needle 23 Rotating shaft 24 Rotating plate scale
24a Upper scale
24b Lower scale
30 Reference part 31 Reference member 31a Reference surface 31b Slide piece 32 Clamp 33 Guide plate W Workpiece S Clearance α Inclination angle

Claims (5)

In an angle measuring instrument that contacts a bent workpiece and measures its bending angle,
A small gap is formed between the front plate and the back plate, and a body that can be gripped by a hand is provided. A main body with bearings on the
An upper scale and a lower scale that form a rotating plate having a vertical plane that intersects the horizontal plane at right angles, and display the measurement range by shifting the measurement range according to the inclination angle of the inclined surface on the circumference of the rotating plate. A rotary part that is engraved with two-stage scales and is pivotally attached to the bearing, and is rotatable.
A bending angle measuring instrument comprising: a reference part having a reference member having a reference surface which is in contact with one side of the workpiece and freely movable in parallel up and down between the front plate and the back plate. In an angle measuring instrument that contacts a bent workpiece and measures its bending angle,
A small gap is formed between the front plate and the back plate, and a body that can be gripped by a hand is provided. A main body portion provided with two scales, an upper scale and a lower scale, which shift and display a measurement range corresponding to the tilt angle of the inclined surface on a part of the body,
A rotating plate having a horizontal plane and a vertical plane intersecting at right angles thereto, an indicator needle pointing to the scale, and a rotating part rotatably mounted on the bearing.
A reference portion that sandwiches a reference member that has a reference surface that is in contact with one side of the workpiece and freely movable in the vertical direction between the front plate and the back plate;
A bending angle measuring device comprising:   3. The bending angle measuring device according to claim 1, wherein an angle α of the extending rod is 15 ° to 45 °, preferably 30 °. 3. The bending angle measuring device according to claim 1, wherein a guide plate for urging the parallel movement of the reference member is disposed at the reference portion.   3. The bending angle measuring device according to claim 2, wherein a scale display window is formed on a part of the inclined surface of the extension rod.

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