KR200293131Y1 - Measuring Instrument for Right Angle Degree - Google Patents

Abstract

The present invention relates to a measuring device for measuring the squareness, and more specifically, the portion that sets the reference plane in contact with the perpendicularity measurement plane of the object to form a rod structure of the circular cross-section that can be developed up and down, The present invention relates to an orthogonal measurement instrument that minimizes errors and freely converts a height of a reference plane within a prescribed range so that an effective measurement operation may be avoided by avoiding a round surface of an object.

The present invention, the guide shaft 30 is vertically placed on the upper surface of the pedestal 10, the lifting member 40 is provided along the guide shaft is provided, the measuring needle 53 and the measured value In the perpendicularity measuring device including a measuring member 50 rotatably coupled to the elevating member with a rotating gauge (54) to display; Both sides of the pedestal hinge hingely coupled to the left and right sides of the pedestal, characterized in that the reference rod 20 is installed up and down while drawing the arc-shaped trajectory around the hinge point.

Description

Measuring Instrument for Right Angle Degree

The present invention relates to a measuring device for measuring the squareness, and more specifically, the portion that sets the reference plane in contact with the perpendicularity measurement plane of the object to form a rod structure of the circular cross-section that can be developed up and down, The present invention relates to an orthogonal measurement instrument that minimizes errors and freely converts a height of a reference plane within a prescribed range so that an effective measurement operation may be avoided by avoiding a round surface of an object.

As the mass production system is generalized with high industrialization, the importance of precision, performance, and quality required for various machines is required. These demands are difficult to ensure the function or compatibility of components unless they are organically and uniformly maintained between designers, manufacturers, inspectors and assemblers in the field.

Accordingly, geometric dimension tolerancing is applied in addition to the usual dimension tolerances in the design of various mechanical components. Such geometric dimensional tolerances are divided into shape tolerances and phase tolerances, and there is a right angle as one of the shape tolerances.

This squareness is defined as the amount of deviation from the complete orthogonal angle at 90 ° of the surface, axis or midplane of the regulated body relative to the datum. The more precise the machine, the lower the squareness of the part will lead to functional degradation and loss of compatibility. Therefore, it is necessary to have a rapid measurement in order to perform a full inspection of the manufactured parts.

Accordingly, various types of right angle measuring instruments capable of measuring the right angle quickly and accurately are provided, and the right angle measuring instrument shown in FIG. 1 shows an example thereof.

As shown in the drawing, the perpendicular measurer is lifted up and down along the pedestal 100, the guide shaft 102 placed on the upper surface of the pedestal 100, and the guide shaft 102 to allow selective fixation at a specific position. The elevating member 104 to be installed, the measuring body 106 protruding from one surface of the elevating member 104 and attaching the measuring needle 108 to the end thereof, and the upper and upper portions of the measuring body 106. It is configured to include a rotary gauge 110 to display the measurement value by the measuring needle 108.

With this configuration, the measuring needle 108 of the measuring body 106 is brought into contact with the surface of the reference body to set the measured value as a reference value, and the measuring objects ("P") are sequentially measured by the measuring needle 108. While measuring the angle, the squareness is measured by comparing the measured value with the reference value.

However, the conventional rectangularness measuring device as described above forms a reference surface in which one surface of the pedestal 100 is in contact with the surface of the measurement object (“P”), or the plate-shaped reference plate body 112 is formed on one surface of the pedestal 100. By installing the wall surface of such a reference plate body 112 is to form a reference surface in contact with the surface of the measurement object.

However, since the portion that sets the reference plane of the squareness measuring instrument has a plate-like structure that forms a relatively wide contact surface, the reference plane does not maintain a horizontal state and generates many errors in itself. There was a problem that the measurement was not made correctly.

For example, one side of the pedestal 100 or the wall surface of the reference plate body 112 is abrasion occurs over a wide surface in the use process, accordingly the phenomenon of contact with the wall surface obliquely while maintaining the inclination of a predetermined angle with the wall surface of the measurement object This resulted in the loss of function as a reference plane.

In addition, since one side of the pedestal 100 or the wall surface of the reference plate body 112 has a fixed position, when the round part is formed at a relatively high position under the measurement object "P", the reference plate body 112 ) Is not in contact with the vertical wall surface of the measurement object ("P") and the contact with the round surface has caused a problem that can not measure the squareness.

That is, a distance corresponding to “L” is generated between the vertical wall surface of the measurement object “P” and the round surface where the reference plate body 112 is in contact with each other. Thus, the reference plate body 112 is rounded. It is necessary to measure the squareness of the measurement object ("P") by "L" apart from the plane, but this operation is very cumbersome and also serves as a factor for making accurate measurement difficult.

In addition, such a conventional rectangular measuring instrument is installed as the measuring needle 108 positioned at the end of the measuring body 106 is exposed to the outside as it is, the measuring needle 108 may be damaged during the measurement of the perpendicularity Was very big.

That is, the article to measure the degree of squareness is mostly a high-strength metal material, so that the high-strength metal surface is in continuous contact with the measuring needle 108 during the measurement process. In this case, the measurement operation is performed while lightly contacting the surface of the measurement object ("P") with the measurement needle 108, but this principle is due to carelessness or unvoicedness of the operator in the process of measuring a large amount of measurement object. Without this being observed, the phenomenon that the surface of the measuring object "P" strikes the measuring needle 108 frequently occurs.

Accordingly, the measuring needle 108 formed in the form of a small diameter pin is broken or broken by the impact of the measuring object ("P") to maintain the high strength, which causes the measuring needle 108 from time to time In addition to the hassle of replacement, the instrument's frequent function loss led to a decrease in product performance.

In addition, the conventional rectangular angle measuring device is provided with a cushioning means that can mitigate the impact during a rapid fall even though the elevating member 104, which is raised and lowered along the guide shaft 102, is very heavy.

Therefore, a great deal of care was required during the measurement operation, and even with a slight carelessness, the lifting member 104 and the measuring body 106 coupled thereto fall, causing the failure of the rotating gauge 110 or the measuring needle 108). There was always a risk of damaging or leading to severe damage of the pedestal 100 or the measuring body 106 itself.

The present invention has been devised to solve the above problems, the reference body that sets the reference plane in contact with the measurement angle of the perpendicularity of the measurement object is made of a rod structure having a circular cross section, such a bar-shaped reference body is in line contact with the measurement plane The object of this invention is to provide a rectangular measuring instrument that can form a complete horizontal reference plane.

In addition, the structure of the reference plane formed in contact with the measurement object perpendicularity measurement surface is developed up and down to convert the height, to provide a squareness measuring instrument that can accurately measure the squareness of the measurement object having a round surface Has a different purpose.

In addition, it is another object of the present invention to provide a rectangular measuring instrument that allows the measuring needle measuring the squareness in contact with the measuring surface to be safely protected from external impact, so that the measuring operation by the measuring needle can be continuously and safely made. .

In addition, by providing a cushioning means at the bottom of the lifting member to make a heavy weight, providing a right angle measuring instrument to prevent breakage or failure of the peripheral devices that receive the impact force, including itself during the sudden drop of the lifting member There is another purpose.

1 is a cross-sectional view showing a measuring device for squareness measurement according to the prior art

Figure 2 is a perspective view showing the overall configuration of a perpendicularity measuring instrument according to the present invention

3 is a side view of the perpendicularity meter according to the embodiment of FIG.

Figure 4 (a) (b) is a side view showing the main structure of the rectangular angle measuring instrument according to the embodiment of Figure 2 and its operation state

<Explanation of symbols for main parts of drawing>

DESCRIPTION OF SYMBOLS 10 Support base 20 Holding bar 22 Holding piece 30 Guide shaft 32 Breaking | stopping prevention part 34 Through hole 40 Lifting member 41 Through hole 42 Inserting groove 44 Engaging groove 46 Tension spring 47 Fixing piece 48 : Tightening lever 50: Measuring member 51: Rotating body 52: Measuring needle fixing body 53: Measuring needle 54: Rotating gauge 55: Rotating lever 60: Protective plate 62: Cutting groove 70: Shock absorbing member 72: Vertical bar 74: Shock absorbing material

In order to achieve the above object, the present invention, the guide shaft is vertically placed on the upper surface of the pedestal, and provided with a lifting member which is lowered along the guide shaft, the rotating gauge for displaying the measuring needle and the measured value Parallelism measuring device including a measuring member rotatably coupled to the elevating member; Both sides of the pedestal hinge hingely coupled to the left and right sides of the pedestal, characterized in that the reference rod is installed up and down while drawing the arc of the arc around the hinge point.

In another aspect, the present invention is characterized in that the bottom of the measuring member, the reinforcing plate for drilling the cutting groove in the front end is fixedly installed so that the end of the measuring needle is inserted and protected.

The present invention is also characterized in that the bottom of the elevating member, the shock absorbing member for preventing a direct collision with the pedestal during the sudden drop is fixedly installed.

According to the present invention having such a characteristic configuration, since the contact surface between the measurement object and the rectangular stratifier can form a completely horizontal reference plane through line contact, the measured value measured through the measuring instrument can obtain a very accurate dimension. It becomes possible.

In addition, the measuring needle formed in the shape of a small diameter pin can be safely protected from external impact, ensuring the robustness of the measuring instrument and at the same time there is no concern about breakage of the measuring needle so that the measurement work can be performed more quickly.

In addition, as a cushioning means is provided between the elevating member and the pedestal to maintain a high weight, the impact force is absorbed by the buffer means during the sudden drop of the elevating member, including the two members that collide with each other, Breakage or failure can be minimized.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

Figure 2 is a perspective view showing the overall configuration of a rectangular angle measuring instrument according to the present invention, Figure 3 is a side view of the rectangular angle measuring instrument according to the embodiment of Figure 2, Figure 4 is a main portion of the rectangular angle measuring instrument according to the embodiment of Figure 2 It is a side view which shows a structure and its operation state.

As shown, the squareness measuring device according to the present invention comprises a pedestal 10, the reference bar 20, the guide shaft 30, the elevating member 40, the measuring member 50.

The pedestal 10 is a portion that forms the base of the orthogonality measuring instrument according to the present embodiment, and the reference rod 20 is rotatably coupled to the front of the pedestal 10 in a vertical direction. That is, a pair of gripping pieces 22 facing the left and right sides of the pedestal 10 is rotatably pin-coupled, and the reference rod 20 has both ends of the gripping pieces 22 respectively. It is installed with pins attached.

The guide shaft 30 is placed on the upper surface of the pedestal 10. The guide shaft 30 is preferably provided in a pair spaced apart, so that the lifting member 40 to be described later to maintain a more stable coupling than the body is prevented flow. In addition, the pair of guide shafts 30, the upper end of the lifting member 40, it is preferable to install a separation prevention device 32 for connecting the two shafts to prevent the separation phenomenon caused by excessive rise.

The lifting member 40 is installed on the guide shaft 30 so that the lifting and lowering can be selectively fixed at a specific position. That is, the elevating member 40 is boring the through hole 41 for inserting the guide shaft 30 on both sides, the fixing piece 47 and the tightening lever (1) on one surface of the elevating member 40 A stopper means consisting of 48) is provided.

The fixing piece 47 is inserted into the insertion groove 42 is formed on one surface of the elevating member 40, both inner surfaces of the insertion groove 42 is formed to communicate with the through hole 41, Through the communication site, the surface of the guide shaft 30 inserted into the through hole 41 protrudes to a predetermined width. Then, the tightening lever 48 is screwed into the inner surface center of the insertion groove 42 through the central portion of the fixing piece 47, the fixing piece by the rotation operation of such a tightening lever 48 47 controls the elevation of the elevating member 40 by pressing the protruding guide shaft 30 while adjusting the insertion depth into the insertion groove 42.

In addition, the measuring member 50 is coupled to the bottom of the elevating member 40, the measuring member 50 is a rotating body 51, the measuring needle fixing body 52, the measuring needle 53 ), And a rotary gauge (54).

The pivot 51 is hinged (H) rotatably into the interior of the coupling groove 44 cut to maintain a predetermined depth at the bottom of the elevating member 40, the upper portion and the coupling groove ( A tension spring 46 is installed between the inner surfaces of 44.

Then, a screw is coupled to penetrate the elevating member 40, the lower end of which is provided with a rotary lever 55 in contact with the upper surface of the rotating body (51). According to the rotational direction of the rotary lever 55, the pressing force is applied to the rotating body 51 while the rotating body 51 is lowered about the hinge H, or the pressing force applied to the rotating body 51 on the contrary. As it is released, the pivot 51 is upward by pulling the tension spring 46.

The measuring needle fixing body 52 is coupled to the tip of the rotating body 51. In addition, the measuring needle 53 is pin-coupled to the tip of the measuring needle fixing body 52 in a state of maintaining a small rotation angle, and the measuring needle 53 above the measuring needle fixing body 53. In accordance with the pressing of the rotary gauge 54 is installed to display the pressing degree numerically.

The operation of the present invention configured as described above will be described.

First, as shown in FIG. 3, in a state where the elevating member 40 is lowered to be positioned above the pedestal 10, the reference rod 20 rotatably coupled to the pedestal 10 is measured. Make contact with the lower wall of (P). In this case, the measurement object (P) may actually be an object to measure the squareness, or may be a separate reference body for calculating a reference value.

In this state, the rotating lever 55 of the measuring member 50 is operated so that the measuring member 50 is rotated, so that the measuring needle 53 at the tip of the measuring member 50 is the measuring object P. The measured value of the rotating gauge 54 is obtained while in contact with the lower wall of the. The squareness of the other measurement object is measured based on the numerical values thus obtained.

That is, when the squareness of the wall surface of the same object is to be measured, after calculating the reference value as described above, the elevating member 40 is raised to the surface where the perpendicularity measurement is required, and then the same as when setting the reference value. The perpendicularity of the measurement target surface is measured through the rotation gauge 54 through the process. By comparing the measured value with the reference value, the squareness of various surfaces of the measurement object can be measured.

In addition, in the case where the reference value is calculated using a separate reference body provided for calculating the reference value, after the reference value is calculated, the object to be measured at right angles is actually brought into contact with the reference rod 20, and then the measuring needle ( 53) is brought into contact with the measurement object P wall to obtain the measured value displayed by the rotary gauge 54. Then, the measured value is compared with the reference value to measure the squareness of the measurement object.

At this time, the reference rod 20 is only the smallest surface located at the tip end is in line contact with the measurement target surface (P), the narrow surface that makes the line contact in this way does not form a different bend measurement error It is possible to form a good reference plane that does not occur. This means that in the process of grasping the reference plane for measuring the rectangular degree, the perpendicularity of the reference plane itself is irregular and thus preventing the accurate measurement from interfering. Further, in addition to holding the reference plane, the reference rod 20 is also in good contact with the wall surface of the actual measurement object, so that the measured squareness can be very accurate.

In addition, as shown in Figure 4, since the reference rod 20 is rotatably coupled to the pedestal 10, even in the case of the measurement object ("P") is formed in the lower round the reference rod 20 Rotate upwards to facilitate contact with the measuring surface located off the round surface to measure the squareness.

That is, as shown in (a), when the rounded surface R is formed at the bottom of the measurement object ("P") to a relatively high point, the reference rod 20 is horizontal with the rounded surface R in the horizontal state. There was no choice but to touch. In other words, the reference rod 20 could not be contacted with the surface to measure the squareness of the measurement object P ', and thus the measurement of the squareness is impossible.

At this time, as shown in (b), by turning the reference bar 20 to the upper side to be in contact with the horizontal wall surface of the measurement object ("P") it is possible to measure the squareness. In addition, since the reference bar 20 has a circular cross section, even when rotated upwards, an accurate squareness measurement value can be obtained by forming a reference surface with a sense of stability with the wall surface of the measurement object (“P”).

In addition, by combining the measuring needle protective plate 60 formed in the form of a thin strip on the bottom of the measuring member 50, the measuring needle 53 is collided with the measuring object ("P") during the perpendicular measurement It would be desirable to prevent damage by other external forces.

That is, the protective plate 60 is fixed to the bottom surface of the rotating body 51 constituting the measuring member 50, such a protective plate 60 is made of a length extending to the measuring needle 53. At this time, the cutting groove 62 is formed at the tip of the protective plate 60 is inserted into the measuring needle 53 is protected. That is, the measuring needle 53 is to pull out one surface of the groove in the state inserted into the incision groove 62, the length of the incision groove 62 is pressed and the bullet shot of the measurement needle 53 There will be enough ways to be made.

Accordingly, the measuring needle 53 is wrapped in a protective plate 60 including the inner surface of the incision groove 62 to be protected from external impact, and the position of the measuring needle 53 by pressing the measuring needle 53 at right angle measurement Since the change width is not so large, the progress of the measurement operation may be sufficiently performed through one surface of the measuring needle 53 drawn out of the cutout groove 62.

In addition, by installing the buffer member 70 on the lower surface of the elevating member 40, by preventing the phenomenon of directly colliding with the pedestal 10 during the sudden drop of the elevating member 70, the measuring member 50 It would be desirable to prevent damage to the entire instrument, including.

In this embodiment, such a shock absorbing member 70 is composed of a vertical bar 72 fixed to the bottom of the elevating member 40, and the shock absorber 74 is coupled to the lower end of the vertical bar 72. Therefore, even when the heavy lifting member 40 is suddenly dropped toward the pedestal 10 due to an operator's mistake, the lifting member 40 is lifted by the vertical bar 72. ) Is prevented from directly colliding with At this time, since the impact force applied to the vertical bar 72 is absorbed by the shock absorbing material 74 in a large amount, the impact applied to the elevating member 40 including the vertical bar 72 is substantially alleviated. As a result, breakage of various instruments coupled to the rotary gauge 54 or other measuring member 50 is suppressed.

As can be seen by the embodiments described above, by measuring the squareness measurement according to the present invention, it is possible to obtain a more accurate measurement value of the measurement targets, and at the same time the measurement operation can proceed more quickly, Not only does this result in improved performance, but also facilitates measurement.

In addition, since the durability of the measuring instrument is improved, unnecessary parts replacement is suppressed and this leads to an extension of the life of the product, thereby bringing an effect of improving economic efficiency.

Claims (3)

A guide shaft is vertically placed on the upper surface of the pedestal, and a lifting member is provided to move up and down along the guide shaft, and is rotatably coupled to the lifting member with a measuring needle and a rotating gauge displaying the measured value. In a squareness measuring device including a measuring member to be; A hinge measuring instrument, characterized in that the hinge is coupled to the left and right sides of the pedestal rotatably, the reference bar is installed up and down while drawing a trajectory of the arc around the hinge point. The method of claim 1, And a reinforcement plate having a perforated cutout at a tip thereof is fixedly installed at the bottom of the measuring member so that the end of the measuring needle is inserted and protected. The method of claim 1, Measuring device for measuring the perpendicularity, characterized in that the bottom of the elevating member, a shock absorbing member is fixedly installed to prevent a direct collision with the pedestal when suddenly dropped.