JP2018194298A - Bending angle measuring device - Google Patents

Abstract

The present invention relates to a bending angle measuring device for a bent work, and in particular, a measuring device capable of measuring the angle of a stepped or cut-and-raised work and expanding the measurement range of the bending angle. offer. Kind Code: A1 An angle measuring device having a reference member 14 having a reference surface 14c which abuts on one side of a work and is freely movable in a vertical direction and a main body 10 having a body 11. An extending support 21 having a height equal to the upper limit height at which the member 14 can move in parallel is formed, and a holder part 20 is provided in which a rotating holder 23 is pivotally attached to the extending support, and a straight support is provided in contact with the other side of the workpiece. A probe having a contact surface and a length shorter than the distance sandwiched by the main body section 12 from the upper end portion 23a of the rotary holder is formed, and the probe is slidably attached to the rotary holder 23 to provide a measuring portion. , a detection unit and a display unit 50 are provided. [Selection drawing] Fig. 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.

The applicant has previously proposed Japanese Patent No. 4316695 regarding the bent angle measuring device.
The outline is a detector that has a measurement reference member that abuts one side of a bent product, and that reads the value of the scale by placing a magnescale on the outer periphery of a semicircular rotor that abuts the other side. It has a characteristic that it has a display device that displays the detected numerical value, and the origin position can be adjusted so that the display on the display device is 90 degrees.
By the way, at the processing site,
1) Not only a simple L-shaped bend, but also a step bending process, in which a process of bending to a form with a level difference of, for example, about 5 mm to 20 mm (a form of a certain Z-type) is performed by two or more bends. May be.
2) Cutting and raising, for example, cutting into an arc shape (window shape) while leaving a part of the plate material, and bending the cut piece in a right angle direction to make a cut and raised state (for example, a state like a book end) May be applied.
3) With the diversification of products, there are products that are bent at a narrow angle and vice versa, and the range of bending angles to be measured tends to be widened.
In these cases, it is difficult to cope with the above-mentioned apparatus due to the limited range of movement of the probe.

Japanese Patent No. 4316695

  The present invention has been made in order to solve the above-mentioned problems, and mainly corresponds to the angle measurement of products by step bending and cutting, and also expands the range of angle measurement accompanying diversification of bending. An object of the present invention is to provide an angle measuring device that can cope with this problem.

  The bending angle measuring apparatus according to claim 1, wherein the bending angle measuring apparatus includes a reference member having a reference surface that is in contact with one side of the bent workpiece and is capable of translation in the vertical direction and a body portion including a body. An extension rod that protrudes with an inclined surface from the upper part of the main body in a direction orthogonal to the reference surface of the main body, and the height of the tip is equal to the upper limit height at which the reference surface of the reference member can be translated from the main body. And a holder portion is provided in which a rotating holder having an upper end equal to the height of the tip end portion of the extension rod is attached to the extension rod, and a straight contact that contacts the other side of the workpiece. A measuring element having a contact surface and having a length shorter than the distance between the upper end of the rotating holder and the main body body is formed, the measuring element is slidably attached to the rotating holder, and the measuring part is disposed. The rotation angle is measured in conjunction with the holder's rotation axis. To disposed a detection section provided with a rotary encoder, characterized in that disposed a display unit for displaying the numerical value read by the detection unit of the encoder.

  The bending angle measuring apparatus according to claim 2 is characterized in that the measuring element is formed in a stick body having a circular cross section that is fitted in a groove formed in a holder and slides in a sliding state.

  The bending angle measuring device according to claim 3, wherein the measuring element is formed into a circular stick body having a circular and square cross section that is fitted in a groove formed in the holder and slides in a sliding state. Features.

  In the bending angle measuring apparatus according to claim 4, the measuring element is fitted in a groove formed in the holder and slid in a sliding state, one of which is circular in cross section and the other is in a circular shape having a circular shape and a square shape. It is characterized by being formed into a stick body with a combination of two.

  The bending angle measuring apparatus according to claim 5 is characterized in that the measuring element is formed of a case body in which upper and lower surfaces or one side is a flat surface, and guide rails for sandwiching the rotary holder are arranged vertically. .

  The bending angle measuring device according to claim 6 is characterized in that the inclination angle of the extended rod is 45 degrees.

According to the bending angle measuring apparatus of claim 1, since the measuring element formed in the measuring part is formed to have a length shorter than the distance between the holder upper end part and the main body body part, it is bent into the step part. The measuring element can be brought into contact with the side surface starting from the upper end of the work step portion while the measuring element is slid with respect to the workpiece and stored from the upper end of the holder to the main body side. Next, when the reference surface is translated upward in accordance with the height and the reference surface is brought into contact with the bottom surface of the work step portion, the height (Hs) of the upper end of the measuring element and the height of the reference surface increased. The difference (Hs−Hk) from the height (Hk) corresponds to (almost coincides with) the height (Hw) of the stepped portion of the workpiece, and in this state, measure the angle formed by the reference surface and the probe. Thus, the bending angle of the step portion of the workpiece can be measured.
At this time, even if the height of the side surface Wb of the work step portion is very low, the angle measuring device is configured so that the height (He) of the extended rod tip portion is the main surface of the reference member. Since the height (Hmax) is set equal to the upper limit height that can be translated from the body portion, the height (Hs) of the upper end portion of the probe and the height of the reference surface increased by setting Hk≈Hmax ( The difference (Hs−Hk) from Hk) can be made as close to zero as possible, and the angle with respect to the bending process can be measured.

When the workpiece is bent and raised, when the rotary holder part is inserted from the cut and raised cavity toward the section, the extension rod supporting the holder is inclined from the main body side. Since it is formed with a surface, the holder and the measuring element can be inserted along the inclined surface from the cavity to a position at a certain depth in the section. When the measuring element is slid along the cut and raised surface of the section, the measuring element can be further inserted. Next, when the reference member is translated in accordance with the bottom surface side of the workpiece, the measuring element in contact with the section and the reference surface of the plate-like portion bottom surface reference member are brought into contact with each other, and the angle between them is measured. Thus, it becomes possible to measure the bending angle of the workpiece that has been cut and raised and bent.
At this time, even when the cut-and-raise angle of the section changes large or small, it is possible to cope with various bending angles by sliding the measuring element to the back based on the inserted rotary holder.

  When the bending angle of the workpiece is within 90 °, slide the probe to the vicinity where the lower end of the probe is flush with the lower end of the holder. If it is 180 ° or more, the holder and probe are turned upside down, and the upper end of the probe is slid so that it is flush with the upper end of the holder. Change the slide state. Next, when the reference member is moved in parallel according to the angle and brought into contact with the work, the measuring element and the reference surface can be brought into contact with the work, and a wide range of bending angles within 90 ° to 180 ° or more. Can be measured.

  On the other hand, for a conventional workpiece bent into an L shape, for example, the bottom surface of the workpiece is first brought into contact with the main body reference surface, and then the measuring element is slid in accordance with the length of the side surface of the workpiece and brought into contact. By measuring the angle between the reference surface and the probe lengthened by the slide, it can be bent sufficiently accurately even for workpieces that have been bent into a conventional L shape. The angle can be measured.

In the measuring apparatus according to claim 2, when the contact surface of the workpiece is a flat surface by forming the measuring element into a stick body having a circular cross section that is fitted in the holder and slid in a sliding state. The circular cross section is in contact with the flat surface as a single tangent, and measurement with high accuracy can be performed.
At the same time, the stick-shaped measuring element can be picked by hand and slid freely, and since it is in a sliding state, it can be fixed at an arbitrary position.

  In the measuring apparatus according to claim 3, when the contact surface with the workpiece is a curved surface such as a cylinder by forming the measuring element on a circular stick body having a circular cross section and a square shape, Contrary to the above, the contact portion of the flat probe with respect to the curved surface of the workpiece becomes one tangent, and stable and highly accurate measurement is possible.

  In the measuring apparatus according to claim 4, in selecting whether the surface to be measured of the workpiece is a flat surface or a curved surface, either a circular cross-section type or a circular square type combining a circular shape and a square shape is selected. It is possible to cope with both by selecting one or the other.

  In the measuring apparatus according to claim 5, the rotating holder sandwiched between the two guide rails formed inside the case body and the measuring element forming the case body slide with each other, so that the sliding state is achieved. Stable, smooth and accurate measurement is possible.

  In the measuring apparatus according to claim 6, when the extension rod is passed through the cavity where the workpiece has been cut and raised, balanced insertion can be performed with respect to the cavities of various bending angles and shapes. And

It is a front view of the bending angle measuring device of the present invention. It is a side view same as the above. It is a partially expanded front view of this invention bending angle measuring apparatus. It is an enlarged front view of a holder part, and its AA line vertical side view. It is the side view and front view which show each aspect of the holder of a bending angle measuring apparatus of this invention, and a measuring element. The measurement state in this invention bending angle measuring device is shown, (a) is the front and side view of the workpiece | work which carried out the step bending process, (b) is a front view at the time of measuring it. The measurement state in this invention bending angle measuring apparatus is shown, (a) is the front and side view of the workpiece | work which were cut and raised, (b) is a front view at the time of measuring it. The measurement state in the bending angle measuring apparatus of the present invention is shown, and (a) is within 90 °, (b) is 90 ° or more, and (c) is a workpiece that is bent at 180 ° or more. FIG.

  As shown in FIGS. 1 and 2, the outline of the bending angle measuring apparatus 1 of the present invention is a main body 10 including a reference member 14 having a reference surface 14c that moves in contact with one side of a work W and a body 12, and a body 12. A holder portion 20 in which a rotary holder 23 is pivotally attached to a shaft body 22 of an extension rod 21 projecting from the main body portion; a measuring portion 30 having a measuring element 31 contacting the other side of the workpiece W disposed on the rotary holder 23; The detection unit 40 includes a rotary encoder 41 that measures a rotation angle, and the display unit 50 displays a numerical value read by the encoder.

The main body 10 includes a body 12 having a grip 11, and a reference member 14 having an L-shape is arranged with a lateral side 14 a along the upper surface of the body 12 and a longitudinal side 14 b along the side surface. Forms the linear smooth reference surface 14c that contacts one side of the workpiece W. The vertical side 14b is fitted in a groove 12a formed on the body 12 so as to be movable in the vertical direction, and a fixing bolt 15 for fixing the body 12 to the body 12 is disposed on a part thereof. An exit groove 14d that avoids collision with the workpiece W is formed at the end of the lateral side 14a.
In the apparatus of the present invention, the vertical direction in which the reference member 14 moves in parallel refers to the direction in which the reference member is orthogonal to the probe when the apparatus is held sideways, and the reference member in FIGS. 14 indicates the direction of moving up and down.

  By loosely tightening the fixing bolt 15, the reference member 14 can be moved in parallel in the vertical direction along the body groove 12a and fixed, and the relative height of the reference surface 14c of the reference member 14 is adjusted to an arbitrary height. Make it possible.

The extension rod 21 protrudes from the front portion 12b of the body 12 of the main body 10 in the direction orthogonal to the reference surface 14c, and a rotation holder 23 is formed at the end of the extension rod 21, but the rotation 12 is rotated from the front portion 12b of the body 12. The extension rod 21 reaching the holder 23 has an upper surface formed on an inclined surface 21a.
Specifically, the angle of inclination depends on the height of the rotary holder 23 and the like. For example, if the angle is about 45 degrees, it is appropriate for measuring the workpiece W cut and raised, which will be described later. Become.

The rotary holder 23 formed at the tip of the extension rod 21 is for holding the measuring element 31 in a rotatable manner. A hole groove is formed in the tip portion of the extension rod 21, and the shaft body 22 is provided there. It is spanned and a rotating holder 23 is pivotally attached to the shaft body 22.
The shape of the rotary holder 23 is desirably as compact as possible within the range in which the measuring element 31 can be held. However, as will be described later, the measuring element 31 is adapted to a form such as a stick body type and a case body type.
Further, the stopper of the rotating holder 23 is not absolutely necessary because the workpiece W and the measuring element are fixed in that state when the workpiece W and the measuring element are in close contact with each other. It is also possible to provide it.

In setting the height (He) of the distal end portion of the extension rod 21, the height is set equal to the upper limit height (Hmax) at which the reference surface 14c of the reference member can be translated from the main body body ( He≈Hmax).
This is because, as will be described later, even if the height of the side surface Wb of the workpiece step portion is very low, the present angle measuring device uses the height (Hs) of the probe upper end portion and the reference surface height (Hk). This is because the bending angle can be measured while minimizing the difference between the two. At this time, the height (Hs) of the upper end portion of the probe means the height (distance) from the groove 12a when the probe 31 is slid and aligned with the upper end 23a of the holder.
That is, as shown in FIG. 6B, the height (Hh) of the rotary holder is such that the upper end portion 23a is equal to the height of the distal end portion 21b of the extended rod 21 and the height of the extended rod distal end portion 21b. When (He) is He≈Hmax, Hh≈He, and therefore Hh≈Hmax. When measuring the stepped portion, the height (Hs) of the upper end of the measuring element is aligned with the height (Hh) of the holder so that (Hs≈Hh).
When measuring the normal workpiece step, the difference (Hs−Hk) between the height (Hs) of the upper end of the probe 31 and the height (Hk) of the raised reference surface 14c is the step of the workpiece W. When the height of the workpiece step portion is very low, the height (He) of the extended rod tip 21b is substantially equal to the upper limit height (Hmax) of the reference member. Assuming that the difference (Hs−Hk) between the height (Hs) of the upper end of the probe and the height (Hk) of the reference surface is based on the relationship of (Hs≈Hh) and (Hh≈He), This is substantially equal to the difference between the height (Hs) of the upper end and the upper limit height (Hmax) of the reference surface.
That is, since the height of the upper limit of the probe is equal to the height of the upper limit of the reference surface, the difference between the height of the probe and the height of the reference surface is as close to zero as possible.
Specifically, the height of the extension rod 21 and the height of the rotary holder are about 32 mm to 34 mm.

The upper end portion 23 a of the rotary holder 23 has a height equal to the height of the tip end portion 21 b of the extension rod 21.
This is to maintain the effect that the height of the extension rod 21 is the same as the upper limit height at which the reference surface 14c of the reference member can be translated from the main body body.

Now, the rotary holder 23 is provided with a straight contact surface in contact with the other side of the workpiece W, and a slidable measuring element 31 is formed while being held by the holder 23.
The measuring element 31 has a stick body type and a case body type.
The stick type means a linear stick having a certain length (hereinafter referred to as a stick body), and one of them is a cylindrical shape (round type 310) having a circular cross section (FIG. 5). (A) Side view (b), front view (b))).
In the case of the stick body, a groove 23b having a substantially semicircular cross section capable of fitting the stick body to a male and female is formed on the end face of the rotary holder 23, and the stick body is fitted therein. It is desirable that the fitting has a slidable looseness, but has a tightness so that the slide becomes a sliding body. This is because after the slider is slid, it can be fixed at that position by releasing the hand.
Instead of the stick body having the circular cross section, the second stick body can be a type (round flat type 320) in which the cross section is a circle and a square (FIG. 5 (b), side view). (B) Front view (b)). The circular portion is used for fitting with the rotary holder 23, and the square is used as a contact surface with the workpiece W with the surface thereof being a flat surface.
In the third mold, there is a combination type 330 in which one (lower side) of the probe 31 is a round type, the other (upper side) is a round flat type, and both are combined (FIG. 5 (c), side surface). (Refer to Figure (a), Front view (b)). By rotating the probe 31 up and down around the holder 23, it is possible to select which one to use with one probe.

  For example, in the stick type, the straight contact surface formed on the measuring element is a surface having a circular cross section and an outer peripheral surface forming a straight line of a certain length in the vertical direction, and the cross section is circular and square. When the type is combined, the outer peripheral surface of the square is a surface that forms a flat surface of a certain length in the vertical direction. Both are provided with a straight portion, and this is called a straight contact surface including a linear body and a face body.

  As shown in FIG. 4, when fitting to the stick-type rotary holder 23, a split groove 23c is cut into a part of the holder 23 for the purpose of adjusting the fit, and a fastening screw 23d is provided there. Can be screwed.

  As shown in the side view (a) and front view (b) of FIG. 5 (d), the case body type is a rectangular case body that has a flat surface on both upper and lower surfaces or one side and has a space inside. In this configuration, a linear guide rail 341 is arranged vertically to form a measuring element 340, and the holder 23 is disposed in a manner to be sandwiched between the guide rails 341. Contrary to the stick body, the rotary holder is housed in the measuring element as the case body.

The length of each of the measuring elements 31 of each type is shorter than the distance between the upper end 23a of the rotating holder 23 and the body 12 of the main body 10 (see FIG. 3).
In other words, the measuring element has a certain length for measuring the angle of the workpiece W to be measured by contacting one side of the reference member 14 with the reference surface 14c of the reference member 14 and contacting the measuring element with the other side. Is needed. On the other hand, if the probe is excessively long with respect to the workpiece W subjected to step bending, the measurement is disturbed.
Therefore, for the purpose of enabling measurement to the workpiece W that has been bent stepwise while maintaining a certain length on the probe 31, the length is sandwiched from the upper end 23 a of the holder 23 to the body 12 of the main body 10. The dimension will be shorter than the required distance.
Specifically, the body 12 of the main body 10 as the base end is a groove portion for the purpose of fitting with the reference member 14 in the body 12 as shown in FIGS. 1, 3, and 6. Since 12a is engraved, the bottom side of the groove 12a is indicated.

  The detection unit 40 is provided with a rotary encoder, and the rotary encoder includes, for example, a light source, and a rotating polarizing plate is disposed at the tip thereof, and further four polarizing plates having a phase difference of 45 ° are disposed. A device composed of four light receiving elements receiving the light can be used. If the detection is of the absolute type, the origin position adjustment is not necessary.

  The display unit 50 is provided with a display screen 51. The display unit 50 receives an electrical signal from the above-mentioned territory encoder and displays a display screen 51 on the liquid crystal screen as a numerical value. For example, it arrange | positions in the front part 12b of the trunk | drum 12. FIG.

  In the above description, the relationship between the height of the tip of the extension rod and the upper limit height of the reference surface of the reference member and the relationship between the upper end of the rotary holder and the height of the tip of the extension rod, Although the “equal” relationship has been described, it is assumed that this has a slight width within a range in which an equivalent effect can be obtained according to the production situation or the like.

Next, the function and effect of the present invention based on the above embodiment will be described.
In the measurement by the present bending angle measuring apparatus, first, measurement of the workpiece W subjected to step bending as a measurement object will be described.
As shown in FIG. 6A, the stepped workpiece W is formed by one bending process to form the upper surface Wc, and then the second bending process produces a side surface Wb and a bottom surface Wa serving as a base. It refers to a workpiece W that is formed and has a so-called step. When measuring the bending angle between the bottom surface Wa and the side surface Wb in such a workpiece W, if the height (Hw) of the side surface Wb is smaller than a certain value (the height is short), the upper end of the measuring element is the upper surface as described above. It collides with Wc and is obstructed by it, making measurement impossible.
Therefore, in measuring the workpiece W in the apparatus of the present invention, first, the measuring element 31 disposed on a part of the rotary holder 23 is slid downward from the tip of the rotary holder 23 toward the main body 10 side. Then, since the length of the measuring element 31 is shorter than the distance between the upper end part 23 a of the rotary holder 23 and the body barrel, the upper end part of the measuring element 31 is set to the upper end part 23 a of the holder 23. Can be stored in the space between the upper end portion 23a of the holder 23 and the main body portion 10. That is, the head of the measuring element 31 can be kept out of the upper end 23 a of the holder 23.
Then, when the upper surface Wc of the workpiece W and the upper end of the measuring element 31 are aligned, the reference member 14 of the main body 10 is raised, and when the reference surface 14c comes into contact with the bottom surface Wa of the workpiece W, The fixing bolt 15 is tightened and fixed in that position. Next, the reference surface 14c is firmly brought into contact with the bottom surface Wa of the workpiece W, and at the same time, the measurement surface 31a of the probe 31 is brought into contact with the side surface Wb.
Then, the difference (Hs−Hk) between the height (Hs) of the upper end portion of the probe 31 and the height (Hk) of the raised reference surface 14c corresponds to the step height (Hw) of the workpiece W. By measuring the angle between the reference surface 14c and the probe 31 in this state, the bending angle of the stepped portion of the workpiece W can be measured.

At this time, even if the height of the side surface Wb of the work step portion is very low (the step portion is short), the angle measuring device should be able to measure the bending angle of the step portion. Can do.
That is, as described above, the difference (Hs−Hk) from the height (Hk) of the reference surface 14c corresponds to the height of the stepped portion of the workpiece W. Since the height (He) of the protruding tip portion 21b is set to a height equal to the upper limit height at which the reference surface 14c of the reference member can be translated from the body barrel portion, Hk≈Hmax. (Hs−Hk) can be made as close to zero as possible, that is, (Hs−Hk) ≈0 in the state of (Hmax) ≈ (Hs).
As a result, even if the side surface Wb of the workpiece W is very small and is as close to zero as possible, the angle with respect to the bending process is measured within a range in which the contact surface 31 of the probe 31 can be secured. Is possible.

Next, the measurement of the workpiece W cut and raised by the measurement object will be described.
As shown in FIG. 7 (a), the cut-and-raise bending process refers to a flat work W that has been cut into a window shape with one side left, and the window-shaped part is bent and raised. The cut cavity portion Wf and the cut section We are formed there, and at this time, it is required to measure the bending angle of the cut section We with respect to the plate-like portion Wd.
In the conventional apparatus, this measurement was difficult. However, in the apparatus of the present invention, first, the tip of the rotary holder 23 is inserted from the cavity portion WF of the cut and raised workpiece toward the section We. . Then, since the extension rod 21 that supports the holder 23 is formed from the main body portion 10 with the inclined surface 21a, intrusion is permitted along the inclined surface 21a forming the blank portion, and the section We It becomes possible to insert the holder 23 and the stator 31 supported by the holder 23 up to a certain back position.
Next, when the measuring element 31 is slid along the cut and raised surface of the section We, the measuring element 31 can be further inserted.
When the reference member 14 is translated in accordance with the plate-like portion Wd side of the workpiece, the measuring element 31 is brought into contact with the section We and the reference surface 14c is brought into contact with the bottom surface of the plate-like portion Wd.
Therefore, it is possible to measure the bending angle of the workpiece W that has been cut and raised by measuring the angle formed by both.
At this time, even when the cut-and-raised angle of the workpiece W is changed not only at a right angle but also larger or smaller, the stylus 31 is slid to the back based on the inserted rotation holder 23 to change various angles. Can also respond.

  Further, when the inclination angle of the extension rod 21 is 45 degrees, when the extension rod 21 is inserted into the cavity Wf where the workpiece has been cut and raised, with respect to the sections W of various bending angles and the shape of the cavity Wf. A balanced insertion is possible.

  When the bending of the workpiece W is within 90 °, for example, as shown in FIG. 8A, the workpiece 31 is slid to the vicinity where the lower end portion of the measuring element 31 is flush with the lower end portion of the holder 23. Adjust to the appropriate position. Next, the reference member 14 is raised at that position or slightly and brought into contact with the bottom surface Wa of the workpiece, and the angle is measured when the probe 31 and the reference surface 14c are aligned. The measuring element 31 can be accommodated while sliding the measuring element 31 with respect to the workpiece W bent inward, and the measuring element 31 can be measured to an angle (for example, 45 °) that matches the inclination angle of the extension rod 21. It becomes.

  In the case of a normal L-shaped workpiece W, measurement is performed with the reference surface 14c and the probe 31 being 90 °, but when the bending of the workpiece W is 90 ° or more, for example, about 125 ° as shown in FIG. If it becomes, the measuring element 31 is slid back and forth in accordance with the workpiece W and adjusted to an appropriate position. Next, the reference member 14 is raised at that position or slightly and brought into contact with the bottom surface Wa of the workpiece, and the angle is measured when the probe 31 and the reference surface 14c are aligned. The slide of the measuring element 31 can cope with the bending angle of the workpiece W.

Further, when the bending of the workpiece W is 180 ° or more, for example, when it is about 225 ° as shown in FIG. 8C, the holder 23 and the measuring element 31 are turned over, and the measuring element 31 is The upper end portion and the upper end portion 23a of the holder 23 are slid to a position where they are flush with each other. Next, the reference member 14 is translated to near the upper limit height and brought into contact with the workpiece W, and the angle is measured when the measuring element 31 and the reference surface 14c are aligned. Angle measurement of 180 ° or more is possible, and when the inclination angle of the extension rod 21 is 45 degrees, angle measurement up to 225 ° is possible.
As described above, it is possible to measure in a wide range from the bending angle 45 ° to 180 ° or more of the workpiece W.

When the probe 31 is a stick body type, there are a round type, a round flat type, and a combination type thereof. First, when a round type (see FIG. 5A) is used, The probe can be picked by hand and slid freely, and since it is in a sliding state, it can be fixed at an arbitrary position, and the operation is simplified without requiring a stopper or the like. The device is also lightweight and can be reduced in size, making it suitable for on-site measurement work.
At this time, if the probe is a stick body having a circular cross section, for example, when the contact surface with the workpiece W is a flat surface, the contact surface having a circular cross section becomes one tangent to the flat surface. As a result, the contact surface is determined as a single line, and stable and highly accurate measurement is possible.

  When the probe 31 is a round flat type (see FIG. 5B), for example, when the contact surface with the workpiece W is a curved surface such as a cylinder, the curved surface of the workpiece W is opposite to the above. On the other hand, the contact portion of the flat measuring element forms one tangent, and as a result, the contact portion is similarly determined as one line, and stable and highly accurate measurement is possible.

  When the measuring element 31 is combined (see FIG. 5C), the round type or the round flat type is used for selecting whether the surface to be measured of the workpiece W is a flat surface or a curved surface. Any one of these can be selected and supported, and both can be handled with a single probe.

  When the split groove 23c is cut into a part of the holder 23 and the fastening screw 23d is screwed, the fastening screw 23d can also be used when the fitting of the probe 31 as a stick body is loosened during use. The fit can be adjusted (see FIG. 4).

  When the probe 31 is a case body (see FIG. 5D), the holder 23 is fixed in a form sandwiched between guide rails 341, and the probe held by the fixed holder 23 is used. Is slidable along the guide rail 341, and although it is slightly larger, the slide is smooth.

When the rotary encoder is arranged in the detection unit 40 and the rotary encoder is configured as described above, the light emitted from the light source passes through the rotating polarizing plate and becomes light having linearly polarized light. The light passes through the polarizing plate and changes to light having four different types of linearly polarized light. Finally, four types of light are detected by the four light receiving elements and output as electric signals according to the intensity.
Since the encoder is of a polarization type, the accuracy does not drop even if the polarizing plate is made smaller. Miniaturization is possible while maintaining high resolution.
For example, a resolution of 0.01 ° can be maintained even when the rotating shaft diameter is reduced to 3 mm.
Therefore, the rotation of the probe can be directly read by using the shaft portion of the rotary encoder also as the shaft body 22 of the extension rod 21, that is, by making the shaft portion of the encoder and the shaft body 22 the same. ,
Enables highly accurate measurement. Further, the structure of the detection unit can be made compact, and the measurement work can be facilitated.

  As described above, the bending angle measuring device according to the present invention brings about a remarkable effect that it is possible to cope with the step bending process and the work that has been cut and raised as described at the beginning, and the measurement of a wide range of angles.

DESCRIPTION OF SYMBOLS 10 Main-body part 12 Body 12a Groove part 14 Reference | standard member 14c Reference | standard surface 15 Fixing bolt 20 Holder part 21 Extension hook 21a Inclined surface 21b Tip part 22 Shaft body 23 Rotating holder 23a Upper end part 23b Fitting groove 30 Measurement part
31 Contact 31a Contact surface 310 Stick type round type probe 320 Stick type round flat type probe 330 Stick type combined type probe 340 Case type probe 341 Guide rail
40 Detection unit 41 Rotary encoder 50 Display unit 51 Display screen W Work Hk Reference surface height Hmax Reference surface upper limit height He Extension rod tip height Hh Holder height Hs Measuring element upper end height Hw Work side Height of

Claims (6)

In an angle measuring device having a main body portion provided with a reference member and a body having a reference surface that is in contact with one side of a bent workpiece and can be moved in parallel in the vertical direction,
An extension rod that protrudes with an inclined surface from the upper part of the main body in a direction orthogonal to the reference surface of the main body, and the height of the tip is equal to the upper limit height at which the reference surface of the reference member can be translated from the main body. Forming a holder portion that is pivotally attached to the extension rod with a rotary holder having an upper end equal to the height of the tip of the extension rod,
A straight contact surface in contact with the other side of the workpiece is provided, and a probe with a length shorter than the distance between the upper end of the rotary holder and the body is formed, and the probe is slidably attached to the rotary holder. Arrange the measuring part,
Arranged a detection unit arranged with a rotary encoder that measures the rotation angle in conjunction with the rotation shaft of the rotation holder,
A display unit for displaying a numerical value read by the encoder of the detection unit is disposed.
A bending angle measuring device characterized by that.   2. A bending angle measuring apparatus according to claim 1, wherein the measuring element according to claim 1 is formed in a stick body having a circular cross section that is fitted in a groove formed in a holder and slides in a sliding state.   Bending angle measurement, characterized in that the measuring element according to claim 1 is formed in a stick body having a round shape and a square shape in which a cross section that slides in a sliding state is fitted into a groove formed in a holder. apparatus.   A configuration in which the measuring element according to claim 1 is fitted in a groove formed in a holder and slid in a sliding state, one of which is a combination of a circular shape in which one is circular in cross section and the other is circular and square. A bending angle measuring device formed on a stick body.   2. A bending angle measuring apparatus according to claim 1, wherein the measuring element according to claim 1 is formed of a case body in which both upper and lower surfaces or one side is a flat surface, and guide rails for sandwiching the rotary holder are arranged vertically.   6. A bending angle measuring device, wherein an inclination angle of the extending rod according to claim 1 is 45 degrees.

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