JP2001074401A - Measuring jig and measuring dimension by corresponding jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring jig with which even a person without experience or skills can easily mark by dots and lines for perforating into a surface of a main pipe and mark for cutting an end of the branch pipe, when connecting a branch pipe to the main pipe at a proper angle. SOLUTION: A measuring jig comprises a band 12 consisting of a magnet sheet having flexibility, and measuring pins 13 made of longer steel than a band width that are placed movable at regular intervals in parallel on the band 12. Measuring is made by pushing the measuring pins 13 from a rear end of the pins 13 to press them to the main pipe 14 together with winding the band 12 up around the branch pipe 15 to fit after making at a top end of each measuring pin 13 by a chalk. Thereby, dots by the measuring pins 13 are marked on a surface of the main pipe 14. Then, the band 12 is shifted to be moved back until the measuring pin 13 is dragged from an end surface, and top end positions of the pins 13 are marked by the chalk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring jig suitable for measuring the shape of a curved portion of an article, such as a shape of an arbitrary cross section of a pipe, and a measuring method using the jig.

[0002]

2. Description of the Related Art Taking piping work as an example, FIG.
When the branch pipe 2 is connected to the main pipe 1 as shown in FIG. 2, a hole 3 having a shape shown in FIG. 2 is formed in the main pipe 1 so that the branch pipe 2 is inserted without any gap. In order to prevent the end of the branch pipe 2 from protruding into the main pipe 1 when connected to the pipe 1,
It is necessary to form the end of the branch pipe 2 into an arc having the same radius of curvature as the outer diameter of the main pipe 1 as shown in FIG.

The method of forming the hole 3 in the main pipe 1 is usually performed by creating a development view. As an example of a method of creating the same, a method of creating a development view in a case where a branch pipe 2 having an outer diameter of 1 / 2R is connected to a main pipe 1 having an outer diameter of R will be described with reference to FIG. (1) First, a circle A having a radius R corresponding to the outer diameter of the main pipe 1 is drawn, and a semicircle B having a radius 1 / 2R corresponding to the outer diameter of the pipe 2 is drawn at a corresponding location.

(2) Next, the arc of the semicircle B is divided into n equal parts (six in the example shown), and a perpendicular line is drawn down from each point to the circle A. Then, a horizontal line is drawn from each intersection point a ₁ , b ₁ , c ₁ ... N _{1 of the} circle A. (3) Next, similarly, the semicircle B is divided into n equal parts, perpendicular lines are lowered from the respective points, and intersections a ₂ , b ₂ , c ₂ ... N ₂ with the horizontal line are connected to draw a front view.

(4) Development of tube 1 FIG. 1 shows a, b, c.
Arc a₁b₁= Ab, arc b₁c ₁= Bc, ...
Arc (n-1)₁n₁= (N-1) n, each point a,
A horizontal line is drawn from b, c._Three,
b_Three, C_Three... n_ThreeDraw and connect. (5) Development of tube 2₀, B₀, C₀..N₀Between
The interval is the length of the arc when the semicircle B is divided into n equal parts, and each point is
a₀, B₀, C₀..N₀Lower vertical and horizontal
Intersection a_Four, B_Four, C_Four... n_FourDraw and connect.

After obtaining the developed view as described above, the developed view is wound around the pipes 1 and 2 to draw a line following the developed view on the surfaces of the pipes 1 and 2, and cut along the drawn line. . There is also a method in which the shape of the hole 3 or the end face shape of the tube 2 is obtained by calculation without being obtained from a developed view.

[0007]

The above-mentioned conventional methods are all troublesome and troublesome. Especially for tube 1
If the pipe 2 is connected by being inclined at an appropriate angle, it is more troublesome and troublesome. A first object of the present invention is not limited to measuring a tube at an arbitrary angle by arranging a number of movable measuring pins in parallel and projecting each measuring pin against the tube, thereby simplifying the surface shape of an article. A second object of the present invention is to provide a measuring jig which can measure a pipe or a metal plate when measuring in a simple and reliable manner in addition to the first object. It is intended to provide a measuring jig which can be performed in a short time. Further, a third object is to provide a measuring jig capable of easily grasping the amount of protrusion of a measuring pin quantitatively and easily, in addition to the first or second object, and a fourth object. Is to provide a measuring method that can easily mark a pipe end with a mark or a line for cutting using a measuring jig that achieves the above first to third objects. It is.

[0008]

A first aspect of the present invention relates to a measuring jig that achieves the first object, and has a flexible band and a plurality of bands arranged at appropriate intervals so as to be able to advance and retreat. A rigid measuring pin. According to the present invention, the shape of the article surface can be measured by projecting the measuring pin toward the article surface and pressing the measuring pin against the article surface to obtain the tip of each pin or a line connecting the pin tips.

According to the present invention, for example, when the branch pipe is oriented at an appropriate angle with respect to the main pipe to determine the distance from the end face of the branch pipe to the main pipe, the band is wound around the branch pipe, and then each measuring pin is connected to the main pipe. It is required by protruding until it hits the pipe, and if you mark the tip of the pin with black ink etc. on the surface of the main pipe, or draw a line connecting the pin tip, and drill holes along each point or drawn line Thus, a hole is formed in which the branch pipe fits snugly.

The band used in the present invention may be of any material or structure that allows the measuring pin to be slidably mounted, and the type is not limited, but is preferably formed of resin. As a result, a band having measuring pins arranged side by side can be easily manufactured, and each measuring pin has a substantially large contact area with the resin, thereby increasing the holding force. It is sufficient that either one of the measuring pins protrudes from the band before and after, but in a preferred invention, both the front and rear protrude from the band. This is because measuring can be performed by pushing in the rear end of the measuring pin, which facilitates measuring.

A second aspect of the present invention relates to a measuring jig which achieves the second object, and in the first aspect of the present invention, the band is a magnet sheet. According to the present invention, when measuring the distance to the surface of an article by winding a band around a tube or attaching it to a metal plate or the like, the band can be fixed to the tube or the metal plate or the like, so that the operation of pushing out a pin becomes easy. In addition, it is possible to accurately measure the amount of protrusion of the pin.

A third aspect of the present invention relates to a measuring jig which achieves a third object, wherein a scale is displayed on each measuring pin in the first or second aspect of the present invention. According to the present invention, the protrusion amount of the pin, that is, the distance to the article surface can be quantitatively grasped by reading the scale.

In a preferred embodiment, the scale is formed by a notch in the pin surface. The measuring pin is slidably mounted on the band, but by forming a notch to make the surface uneven, the sliding resistance with the band increases, making it difficult to delusion, and measuring accurately and reliably. Will be able to do it.
According to a fourth aspect of the present invention, there is provided a branch pipe end when a small-diameter branch pipe is connected to a large-diameter main pipe at an appropriate angle using the measuring jig according to the first to third aspects of the present invention. This method relates to a method of making a mark consisting of a point or a line for cutting on a part, wrapping a band around a branch pipe and projecting each measuring pin until it hits the main pipe. It is characterized in that it is retracted by shifting it from the end face until it is pulled in, and the tip of the measuring pin is marked on the surface of the branch pipe, or a line connecting the tip of the measuring pin is drawn on the surface of the branch pipe. ADVANTAGE OF THE INVENTION According to this invention, the mark which consists of a mark and a cutting line at the time of connecting to a main pipe on a branch pipe surface can be easily performed.

According to a fifth aspect of the present invention, there is provided a flange-like flange for reinforcing a molten metal container such as a blast furnace pot or a converter pot using the measuring jig according to the first to third aspects of the present invention. When attaching a skirt to a flange and a container to prevent the attachment of molten metal to the flange, or to attach a skirt to the flange, this is a method of marking dots or lines on a steel plate for cutting into a flange or skirt shape. After mounting the band on the table or iron plate and projecting each measuring pin until it hits the container for molten metal, remove the band from the mounting table and place it on the iron plate,
Alternatively, it is characterized in that the tip of the measuring pin is marked on the iron plate, or a line connecting the tip of the measuring pin is drawn on the surface of the iron plate. ADVANTAGE OF THE INVENTION According to this invention, when attaching a container for containers metal to an iron plate, the marking which consists of a mark, a cutting line, etc. can be performed easily.

[0015]

FIG. 5 relates to a measuring jig according to the present invention, in which a band 12 made of a flexible magnet sheet in which magnet powder is mixed with resin is arranged at regular intervals on the band 12. As shown in FIG. It is a molded product that is provided with a rigid measuring pin 13 made of steel that is longer than the band width and that can be advanced and retracted. Is attached.

FIG. 6 shows an example of the use of the above-described measuring jig. When the branch pipe 15 is connected to the main pipe 14 at an appropriate angle, the band 12 is wound around the end of the branch pipe and attached. After the black tip is attached to the tip of the pin, each measuring pin 13 is pushed in from the rear end and pressed against the main pipe 14, and the measuring pin 1 is attached to the main pipe surface.
Score 3 points. FIG. 7 shows the main 14 thus marked 16.

Next, the branch pipe 15 is pulled away from the main pipe 14, and the band 12 is moved backward along the pipe 15 by shifting it toward the near side in FIG. 6 until the measuring pin 13 is pulled in from the pipe end face. Then, after indicating the pin tip position on the surface of the branch pipe with black ink or the like, the band is removed. FIG. 8 shows the point 17 thus displayed on the tube surface. As described above, the point 16 is added to the main pipe 14 and the branch pipe 18.
And 17 are displayed, hole punching and cutting are performed according to each point.

According to the measuring jig of the present embodiment, since the band is formed of a magnetic sheet, the band can be fixed to a tube or a metal plate made of a magnetic material. The measurement can be performed with high precision, and the pins are graduated to make it easy to grasp the amount of protrusion quantitatively. The jig can be easily manufactured by insert molding the measurement pins. The contact area between the pin and the resin is large, the scale is marked with notches, and the pin surface is uneven, so the holding power is large and it is difficult to be delusional. Because it is longer, a part of it protrudes from the band, making it easy to take in and out, and when connecting the branch pipe to the main pipe, wind the band around the branch pipe, After applying black ink to the end, the pin is pressed against the main pipe so that a dot-like mark is formed on the main pipe surface, and the band is shifted back until the pin tip is pulled in from the branch pipe surface. By letting
The tip of the pin can be displayed on the surface of the branch pipe with black ink, etc., so that anyone can easily and easily find the perforated part on the main pipe and the cut part on the end of the branch pipe without requiring a development view. Can be displayed.

As shown in FIG. 9, a flange 22 having a flange shape is attached to a molten metal container 21 such as a blast furnace pot or a converter pot for reinforcement. When the skirt 23 is attached to the container, or when the iron plate is attached to the tube, the measurement of the molten metal container or tube is performed in the same manner using the above-mentioned measuring jig. The surface shape can be displayed.

[0020]

According to the measuring jig of the first aspect of the present invention, anyone can easily and easily measure the shape of the article surface simply by projecting the measuring pin and hitting the article surface. According to the measuring jig of the second aspect of the present invention, since the fixing to the pipe or the metal plate is easily and reliably performed, the pushing operation of the measuring pin is facilitated, and the measuring by the amount of protrusion of the pin can be performed accurately. become.

According to the measuring jig of the third aspect of the present invention,
The distance to the surface of the article can be grasped quantitatively.
According to the measuring method of the fourth aspect of the invention, when connecting a branch pipe, marking on the branch pipe end when cutting the branch pipe end can be easily performed. According to the measuring method of the present invention, when attaching a reinforcing flange or skirt to a molten metal container such as a blast furnace pot or a converter pot, a mark on the end of a branch pipe when cutting an iron plate. Can be easily attached.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state where a branch pipe is connected to a main pipe.

FIG. 2 is a front view of a main pipe in which holes for connecting branch pipes are formed.

FIG. 3 is a front view of a branch pipe having a pipe end formed in an arc.

FIG. 4 is a diagram showing a method of creating a development view.

FIG. 5 is a plan view of a measuring jig according to the present invention.

FIG. 6 is a view showing an example of use of the measuring jig shown in FIG. 5;

FIG. 7 is a front view of the main pipe with a mark displayed by a measuring jig.

FIG. 8 is a plan view of a branch pipe on which a mark is displayed by a measuring jig.

FIG. 9 is a perspective view of a container for molten metal.

[Explanation of symbols]

 12. Band 13. Measuring pin 14. Main pipe 15. Branch pipe 16, 17, Point 21. Container for molten metal 22. Flange 23. Skirt

Claims (5)

[Claims] 1. A measuring jig comprising: a flexible band; and rigid measuring pins arranged in parallel with the band so as to advance and retreat at appropriate intervals. 2. The measuring jig according to claim 1, wherein the band is a magnet sheet. 3. The measuring jig according to claim 1, wherein a scale is displayed on each measuring pin. 4. A branch pipe end using a measuring jig according to any one of claims 1 to 3, when connecting a small diameter branch pipe to a large diameter main pipe at an appropriate angle. This is a measuring method of displaying a mark consisting of a point or a line for cutting on the part, wrapping a band around the branch pipe, projecting each measuring pin until it hits the main pipe, and then connecting the band with the branch pin. A measuring method characterized in that it is retracted until it is retracted from the pipe end face, and the tip of the measuring pin is marked on the surface of the branch pipe, or a line connecting the tip of the measuring pin is drawn on the surface of the branch pipe. 5. A flange or skirt is cut on an iron plate by using the measuring jig according to any one of claims 1 to 3 when a reinforcing flange is attached to the molten metal container or a skirt is attached. A measuring method for displaying a mark consisting of a point or a line for processing, wherein a band is mounted on a mounting table or the iron plate, and each measuring pin is protruded until it hits a molten metal container, and then a band is mounted. A measuring method characterized in that it is removed from the table and placed on an iron plate, or shifted on the iron plate and retracted, and the tip of the measuring pin is marked on the iron plate, or a line connecting the measuring pin ends is drawn on the surface of the iron plate. .