JP5613984B2 - Slit inspection method and jig - Google Patents

Description

  The present invention relates to a method for inspecting whether a gap (gap) of an object satisfies a predetermined tolerance, and an inspection jig used therefor. In particular, the present invention relates to a method for inspecting whether or not the opening of the claw (joint) is within a tolerance in a production line for a sheet pile (steel sheet pile or the like), and a jig used for the inspection.

  Generally, a caliper or a gap gauge is used as a means for measuring the gap between objects. If these measuring instruments are used, it is possible to accurately measure the gap. For this gap, a tolerance (control range) is determined, and in order to check whether the tolerance is satisfied, whether the operator or computer is within the upper and lower limits of the tolerance based on the measured value The process of judging is necessary.

  For example, JIS A 5528 defines hot rolled steel sheet piles in addition to chemical components and mechanical properties, as well as shapes, dimensions, tolerances, and the like. In particular, the joint must have a structure that can be sufficiently engaged when driven and can be easily detached when pulled out, and can be as watertight as possible. Accordingly, the dimensions of the joint claw opening and the like are precisely defined by the manufacturer.

  Conventionally, when measuring the opening size of the nail, it is common for an operator to measure the opening size of the nail using a caliper at an inspection site. A technique for measuring online using a non-contact type measuring instrument has been proposed (Patent Document 1).

  The apparatus of Patent Document 1 is arranged at the top and bottom of the stopped structural steel, and horizontally and vertically moved at the front end of the biaxial stage mechanism to turn at least 180 degrees horizontally to horizontally cross-section the structural steel. A detection head with a built-in laser displacement meter capable of detection in each of the vertical and oblique directions is attached.

  Then, each dimension value and partial profile of the section steel are calculated and displayed from the measured value of the laser displacement meter, the position of the biaxial stage mechanism, and the direction of the detection head.

  On the other hand, although it is a contact-type measuring apparatus, Patent Document 2 discloses an apparatus that measures the claw opening of a steel sheet pile with high accuracy without variation of measurement values by an operator.

  In the apparatus of Patent Document 2, the measuring head is attached to a rotatable roller group that is in contact with the side surface of the steel sheet pile at three points so that the relative distance from the roller group can be adjusted. A claw member and a magnescale for measuring the amount of movement of the claw member are arranged close to each other.

  The measuring head is always in a horizontal state with a spring. During measurement, the measuring head is mounted so that it can be swung and swung freely along the side surface. The measuring head can be moved toward and away from the side surface and moved up and down. This is a possible configuration.

  Further, Patent Document 3 discloses a caliper for improving the efficiency of measuring the dimensions of a steel sheet pile joint by an operator.

  This caliper measures the interval between the recesses such as the joint of the steel sheet pile and the wall thickness of the recesses at the same time, the main scale, and a first slider provided slidably in the longitudinal direction of the main scale, The second slider is provided so as to be slidable in the longitudinal direction of the first slider.

  The main scale has a measurement jaw that comes into contact with one inner wall of the recess, the first slider has a measurement jaw that comes into contact with the other inner wall across the recess, and the second slider has It has a jaw that contacts the outside of the wall of the recess.

  Further, the main scale has a main scale, the first slider has a vernier scale serving as an auxiliary scale for the main scale, and the main scale for the second slider, the second slider. Is provided with a vernier scale serving as an auxiliary scale with respect to the main scale.

  Patent Document 4 discloses an inspection gauge for a control rod guide tube having a large-diameter portion having a predetermined inner diameter and a small-diameter portion having an inner diameter smaller than the large-diameter portion by a required amount. This inspection gauge comprises a large diameter through gauge that matches the required diameter of the inner diameter of the large diameter portion and a small diameter through gauge that matches the required diameter of the small diameter portion. These are integrally formed corresponding to the arrangement of the large diameter portion and the small diameter portion.

  Patent Document 5 discloses a gap measuring instrument. In this gap measuring instrument, two taper gauges each having a different V-shaped tip part angle are overlapped so as to be relatively movable in the insertion direction at the time of measurement, and the tip part is inserted into a gap to be measured. In this case, the gauge portion is provided with a scale portion corresponding to the relative movement amount corresponding to the gap size.

  However, the devices of Patent Literature 1 and Patent Literature 2 require a large capital investment. Even if equipment is introduced, in order to prevent erroneous measurement due to equipment failure, continuous maintenance of the equipment is also required.

  The caliper of Patent Document 3 has the convenience that the operator can simultaneously measure the opening degree of the joint and the thickness of the joint. However, after measuring the opening of the joint, it takes time to record the measured value and time to judge whether the measured value satisfies a predetermined tolerance, and in terms of work efficiency of the inspection. There's a problem.

  That is, even if the rolling efficiency of the steel sheet pile is increased in order to increase productivity, it takes time to make a pass / fail judgment of the joint opening of the steel sheet pile in the inspection process, so one worker can do it within a certain time. The number of inspections (the number of joint measurement points) is naturally limited. In other words, in order to achieve inspection efficiency commensurate with rolling efficiency, it must be handled by increasing the number of workers. Conversely, when the number of workers is limited, the inspection efficiency becomes a bottleneck, leading to a situation where the overall production efficiency is reduced.

  Moreover, although the inspection gauge of patent document 4 can be used for the dimension inspection of the inner diameter of a pipe or a hole, it is not suitable for the dimension inspection of the gap of the object which consists of a substantially plane which faces a steel sheet pile joint. This is because the inspection gauge does not have a structure suitable for being inserted into a gap such as a steel sheet pile joint.

  In addition, the gap measuring instrument of Patent Document 5 is suitable for measuring a gap formed by planes parallel to each other, but a plane (steel sheet pile flange outer surface) and a curved surface (steel sheet pile joint tip) like a steel sheet pile joint. It is not suitable for measuring the minimum gap of the gap between the two sides) and determining whether the measured gap is within a predetermined dimensional tolerance.

JP-A-7-120225 Japanese Utility Model Publication No. 5-27608 JP 2006-258597 A Japanese Patent Laid-Open No. 5-273281 JP-A-61-105403

  Conventionally, the problem to be solved by the present invention is, for example, whether a gap between a plane and a curved surface, such as a joint opening of a steel sheet pile, or a gap between a curved surface and a curved surface is within tolerance. It is a point that an operator cannot judge easily and immediately.

The slit inspection method of the present invention is:
The point where the plane and the curved surface is facing slits or to curved surfaces and location of slits curved is facing to be able determine easily and quickly the operator whether to satisfy a predetermined tolerance,
One of the first and second parts that linearly arranged in the longitudinal direction of the slit, with movably configured to insert or contact at least the first component in the slit, the movement direction of both components a mechanism for displaying the relative distance,
The slit width at the slit longitudinal direction position where the length in the slit width direction is the maximum when the linearly arranged first component and second component are positioned so as to be parallel to the longitudinal direction of the slit. Using the inspection jig of the present invention in which the length of the direction is the upper limit value of the tolerance of the slit for the first component, and the lower limit value of the tolerance of the slit is the second component ,
The most important feature is that the determination of the inspection is performed based on the relative distance in the moving direction of both parts when inserted or brought into contact with the slit .

In the present invention, for linearly placing the first part and the second part in the longitudinal direction of the slit, since not deep depth of the nail of steel sheet pile of interest, the pawl (slit) of the steel sheet pile This is because the inspection cannot be performed when they are arranged in series in the direction of movement for insertion or contact .

According to the present invention, since the operator can easily and immediately determine whether or not the slit of the object satisfies the predetermined tolerance, the efficiency of the inspection work can be improved. Further, in the case of sampling inspection, it is possible to inspect a large number of locations within a predetermined time compared to the conventional method, which is useful for quality control.

It is the figure which showed an example of the test | inspection jig | tool of this invention, (a) is a general view, (b) is a relative distance display and an enlarged view of a pass / fail judgment part. It is explanatory drawing of the inspection method using the inspection jig of this invention when the opening degree of the joint of a steel sheet pile is in the size tolerance, (a) is the contact of the first and second rolls to the opening of the joint (B) is a diagram showing a state in which the first roll is in contact with the joint opening, (c) is a diagram showing a state in which the second roll has started entering from the joint opening, d) is a diagram showing a state in which the second roll has completed entry into the joint. It is explanatory drawing of the other example of the test | inspection method using the test jig | tool of this invention, (a) is when the opening degree of a joint is larger than the upper limit of a dimension tolerance, (b) is the opening degree of a joint of a dimension tolerance. It is a figure in case it is smaller than a minimum. It is the figure which showed the other example of the inspection jig of this invention. (A) is a figure which shows the other example of the display mechanism of the relative distance of the inspection jig of this invention, (b) is a figure which similarly shows the other example of a pass / fail judgment mechanism. (A)-(i) is a figure explaining the example of the other shape which can be used as a 1st, 2nd components, and is the figure which looked at the paper surface right side from the front, respectively, and the paper surface left side is the figure seen from the side surface. .

The purpose of the present invention is to enable an operator to easily and immediately determine whether a slit at a place where a plane and a curved surface or a curved surface and a curved surface are within a tolerance is parallel to the longitudinal direction of the slit. The first component having the slit width direction length as the upper limit value of the slit tolerance at the slit longitudinal direction position where the length in the slit width direction is the maximum, and the lower limit value of the slit tolerance The second part is arranged linearly in the longitudinal direction of the slit , and at least the first part is configured to be movable so as to be inserted into or contacted with the slit, and the relative distance in the moving direction of both the parts is displayed. It was realized by doing.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention together with a new idea of the present invention will be described below with reference to the accompanying drawings.

The inventors set the length in the slit width direction at a position in the slit longitudinal direction where the length in the slit width direction is the maximum in a state of being positioned parallel to the longitudinal direction of the slit as a predetermined length 2 It was found that it is possible to determine whether the slit of the object is within the tolerance by arranging two parts linearly in the longitudinal direction of the slit and moving them so as to be inserted or contacted with the slit , thereby completing the present invention. It was.

Hereinafter, linearly arranged in the longitudinal direction of the slit, in a state of being positioned so as to be parallel to the longitudinal direction of the slit, as the length is Ru predetermined maximum length Der parts of the slit width direction, a predetermined external The best mode of the present invention using a cylindrical roll having a diameter will be described with reference to FIG.

  Reference numeral 1 denotes an inspection jig according to the present invention for inspecting whether a gap between objects, for example, a size of an opening of a joint of a steel sheet pile is within tolerances. The rolls 4 and 5 are attached so as to be freely rotatable. The rolls 4 and 5 are preferably attached to the core rods 2 and 3 so that the rolls 4 and 5 having other outer diameters can be replaced.

  Among these, the 1st roll 4 is formed so that the outer diameter may become the tolerance upper limit of the said joint opening. Moreover, the 2nd roll 5 is formed so that the outer diameter may become the tolerance lower limit value of the joint opening.

  The first roll 4 and the second roll 5 are attached to the case 6 so that the end faces thereof are parallel to each other, for example, the axes of the first roll 4 and the second roll 5 are aligned. It has been.

  In the example shown in FIG. 1, both the first and second rolls 4 and 5 are attached to the case 6 so as to be movable by a predetermined amount in a direction orthogonal to the axis of the rolls 4 and 5, and are springs. 7 and 8 are urged to protrude most with respect to the case 6.

  Therefore, even if the rolls 4 and 5 move during the inspection, they are returned to their original positions by the restoring force of the springs 7 and 8 after being taken out from the opening of the joint after completion of the inspection.

  Reference numeral 9 is a pointer installed at the base end of the core rod 2 to which the first roll 4 is attached, and 10 is a scale plate installed at the base end of the core rod 3 to which the second roll 5 is attached. The scale plate 10 displays the relative distance in the direction orthogonal to the axes of the two rolls 4 and 5.

  Reference numeral 11 denotes a pass / fail determination marker attached to the scale plate 10 for determining whether or not the gap satisfies a predetermined dimensional tolerance. The acceptance / rejection determination marker 11 is determined to be “pass (within dimensional tolerance)” if the pointer 9 is within the range above the lower end.

  The inspection jig 1 of the present invention is configured as described above, and a method for inspecting, for example, the opening of a steel sheet pile joint using the inspection jig 1 will be described with reference to FIG.

The operator uses the inspection jig 1 of the present invention so that the axial direction of the first and second rolls 4 and 5 is parallel to the slit direction of the opening a of the joint A of the steel sheet pile. It moves to the direction orthogonal to the axis | shaft of the 2nd rolls 4 and 5, and the 1st, 2nd rolls 4 and 5 are brought close to the opening a of the joint A of a steel sheet pile (FIG. 2 (a)).

  When the inspection jig 1 of the present invention is further moved in the above direction, the first roll 4 comes into contact with the opening a of the joint A (FIG. 2B).

  When the inspection jig 1 of the present invention is moved in this direction from this state, the first roll 4 remains in contact with the opening a of the joint A and only the second roll 5 is opened. The approach to a is started (FIG.2 (c)).

  By this movement, the first roll 4 moves to the proximal end side of the core rod 2 against the urging force of the spring 7, and the relative distance L between the first roll 4 and the second roll 5 is the pointer 9. Is displayed by a position indicating the scale plate 10.

  When the inspection jig 1 of the present invention is further moved in the above-described direction, the relative distance L between the first roll 4 and the second roll 5 increases, and the second roll 5 has completed entering the joint A. (FIG. 2 (d)).

  As a result of this inspection, the first roll 4 formed such that the outer diameter becomes the tolerance upper limit value of the joint opening degree stopped in contact with the opening a of the joint A. On the other hand, the second roll 5 formed so that the outer diameter becomes the tolerance lower limit value of the joint opening degree has completed the entry of the joint A into the opening a. If the relative distance L is equal to or greater than the lower limit position deemed acceptable by the pass / fail determination marker 11, it is determined that the joint opening is within the tolerance.

  On the other hand, when the first roll 4 formed so that the outer diameter becomes the tolerance upper limit value of the joint opening can be inserted into the opening a of the joint A (FIG. 3A), The relative distance L between the roll 4 and the second roll 5 is substantially 0, and it is determined that the joint opening is larger than the upper limit of the tolerance and is outside the tolerance. Further, if the relative distance L between the first roll 4 and the second roll 5 is less than the lower limit position deemed acceptable by the pass / fail determination marker 11 (FIG. 3B), the joint opening is the lower limit of tolerance. Judged to be smaller and out of tolerance.

  The present invention is not limited to the above example, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, in the example of FIG. 1, both the first roll 4 and the second roll 5 are urged by the springs 7 and 8 in the direction perpendicular to the axis of the rolls 4 and 5, but either one as shown in FIG. Only one roll 4 or 5 may be provided with a spring. Further, the first roll 4 and the second roll 5 do not have to be provided with a spring.

  However, when a spring is provided only on the second roll 5 or when both the rolls 4 and 5 are not provided with a spring, the second roll 5 is always more open than the first roll 4 at the joint opening. It is necessary to arrange it so as to be located on the upstream side in the insertion direction (the lower side in FIG. 1).

  Moreover, what is necessary is just to let the length of the axial direction of the 1st roll 4 and the 2nd roll 5 be an appropriate length according to the parallel part (slit) length of the opening part of the joint which is a test object. When the parallel part length is short, the appearance may be a ring-shaped cylindrical body. If the length of the cylinder is made longer than necessary, the weight of the inspection jig becomes heavy, and in the case of manual inspection work, workability deteriorates and the manufacturing cost of the inspection jig is high, so it should be avoided. .

  Further, in the example of FIG. 1, the pointer 9 and the scale plate 10 are shown as means for displaying the relative distance L in the direction orthogonal to the axes of the first roll 4 and the second roll 5. Means (a dial gauge or the like) or electrical means (a combination of a displacement meter such as a magnescale and a digital display) may be used. FIG. 5A shows an example in which a contact displacement meter 12 capable of adjusting the vertical position is adopted.

  In addition, the pass / fail judgment is performed by replacing the pass / fail judgment marker 11 shown in FIG. 1 with an electrical or electronic means, and when the relative distance L exceeds a preset numerical value, the fact is displayed on the digital display. May be. Further, various means for appealing to the sense of sight and hearing, such as a method of lighting or blinking the LED or informing the worker with a buzzer or the like, may be adopted. FIG. 5B shows an example in which the limit switch 13 capable of adjusting the vertical position is employed.

  In the invention example shown in the accompanying drawings, cylindrical rolls 4 and 5 are used as the first and second parts. However, instead of the cylindrical roll, other shapes such as shown in FIG. These parts may be used.

  6 (a) is a sphere, (b) and (c) are ellipsoids, (d) is an abacus bead, (e) is a cone, and (f) is a shape obtained by cutting the tip of the cone. Also, an elliptic cylinder as shown in FIG. 6 (g), a shape obtained by cutting the tip of the elliptical cone as shown in (h), and semicircles of the same radius arranged oppositely as shown in (i) are connected by straight lines. It may be a columnar body having a cross-sectional shape.

For shape shown in FIG. 6 (a) ~ (h) , the portion of the length of the slit width direction has a predetermined maximum length is in contact slit and the line, when the wear is severe products and use environment, the slits The maximum length in the width direction is reduced, and parts of the inspection jig need to be replaced. However, if a shape having a parallel part in which the largest part has a length continuous in the direction of insertion into the slit as shown in FIG. 6 (i), the maximum length does not change until the parallel portion all is worn Therefore, it can be used stably for a long time, which is preferable.

  Although not shown in the drawing instead of the cylindrical roll, a polygonal pyramid shape such as a quadrangular pyramid or a shape obtained by cutting the tip of the polygonal pyramid shape may be used.

   The present invention as described above is not limited to the inspection of the opening degree of the joint portion of the steel sheet pile, but can be applied to the inspection of any object gap (gap).

DESCRIPTION OF SYMBOLS 1 Inspection jig 4 1st roll 5 2nd roll 7 Spring 8 Spring 9 Pointer 10 Scale plate

Claims (7)

A method for inspecting whether a slit of an object is within a predetermined tolerance,
The first part and the second part are linearly arranged in the longitudinal direction of the slit,
The length in the slit width direction at the position in the slit longitudinal direction where the length in the slit width direction is the maximum in the state where the first component and the second component are positioned so as to be parallel to the longitudinal direction of the slit. The first component is the upper limit of the tolerance of the slit, and the second component is the lower limit of the tolerance of the slit,
These first and second parts are moved in order to insert or contact with the slit in a state of being positioned so as to be parallel to the longitudinal direction of the slit, the movement of both parts when was inserted to or in contact with the slit An inspection method comprising: determining the inspection based on a relative distance in a direction. Wherein one of the two parts, before Symbol second component is insertable into the slit, and when pre-Symbol first component is inserted impossible state to the slit, the relative distance of the direction of movement of both parts 2. The inspection method according to claim 1, wherein the slit is determined to be within a tolerance when the value is equal to or greater than a predetermined value. A jig for inspecting whether a slit of an object is within a predetermined tolerance,
One of the first and second parts that linearly arranged in the longitudinal direction of the slit, with movably configured to insert or contact at least the first component in the slit, the movement direction of both components a mechanism for displaying the relative distance,
The slit width at the slit longitudinal direction position where the length in the slit width direction is the maximum when the linearly arranged first component and second component are positioned so as to be parallel to the longitudinal direction of the slit. The length of the direction is set to an upper limit value of the tolerance of the slit for the first part, and the lower limit value of the tolerance of the slit for the second part . 4. The inspection treatment according to claim 3, further comprising a mechanism for indicating that the slit is within a tolerance when a relative distance in the moving direction of the two parts exceeds a predetermined value. Ingredients. Before Stories second component, according to claim 3, wherein so as to be positioned on the upstream side in the direction than the first part to move in order to insert or contact with the slit, characterized in that it is biased by a spring Or the inspection jig of 4.   The inspection jig according to claim 3, wherein the first part and the second part are configured to be freely replaceable. The first part and the second part has an outer diameter, according to any of claims 3-6, characterized in that a cylindrical roll is the upper limit or the lower limit value of the tolerance of the slit Inspection jig.

Images