Scribing jig

Abstract

To provide a scribing jig that allows for drawing a scribe line for positioning when scribe target objects are joined to each other.SOLUTION: A scribing jig 10 is used for a scribe target object in which a plurality of holes is disposed, and comprises: a main body part 20; two protruding parts 30 arranged at an interval, protruding in a columnar shape from one surface side of the main body part 20; and a line drawing guide part 40 formed cut through the main body part 20 and capable of guiding scribing means to draw a scribe line. The protruding part 30 can be inserted into a hole Fa of a flange F being a scribe target object, and the line drawing guide part 40 allows for drawing the scribe line so as to be orthogonal to a virtual line L at an intermediate point MP of the virtual line L connecting centers C of the holes Fa.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a marking tool capable of drawing a marking line on an object to be marked. [Background technology]

[0002] A conventional scribing jig is described in Patent Document 1. According to this, the jig is configured by connecting a first leg having a scribing needle at the tip edge, and a second leg having a pair of contact pieces on the left and right at a fixed interval, the contact pieces having a contact point facing downward on the tip edge and a tracing contact point connected to it at an angle of approximately 90°, the other end edges of which are connected by a pivot pin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-44067 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned marking tool is used when drilling bolt holes on a specified circumference in a flange or other object to be marked, and cannot be used to draw marking lines that enable alignment when subsequently joining flanges with bolt holes formed in them.

[0005] In view of the above circumstances, the present invention provides a marking tool capable of drawing alignment lines when objects to be marked are to be joined together. [Means for solving the problem]

[0006] In the invention described in claim 1, the marking tool is used on an object to be marked having a plurality of holes, A main body portion, Two projections protruding in a columnar shape from one surface side of the main body with a gap therebetween; a line drawing guide portion formed by drilling the main body portion and capable of guiding a marking means to draw a marking line; Equipped with The protrusion is insertable into the hole of the object to be marked, The line drawing guide portion is capable of drawing the scribe line at the midpoint of an imaginary line connecting the centers of the holes so as to be perpendicular to the imaginary line.

[0007] According to this, for example, when two objects to be marked are to be joined facing each other, a marking line can be drawn and the objects can be aligned based on the marking line.

[0008] Here, in the present invention, not only is it physically "the midpoint of the imaginary line connecting the centers of the holes" or "perpendicular to the imaginary line," but it also includes "approximately the midpoint of the imaginary line connecting the centers of the holes" and "approximately perpendicular to the imaginary line" taking into consideration the common technical knowledge at the time of filing, such as dimensional tolerances and product variations due to processing accuracy.

[0009] The main body portion is composed of a central member, and a first member and a second member that are movable relative to the central member, one of the protruding portions is disposed on one surface side of the first member, and the other of the protruding portions is disposed on one surface side of the second member, a first rack portion disposed on the first member, a second rack portion disposed on the second member, and a pinion portion rotatably disposed on the central member and engaging with the first rack portion and the second rack portion, The first member and the second member are moved to move the protrusions closer to and away from each other.

[0010] This allows the tool to be used for marking objects having different hole spacing.

[0011] In addition, two second convex portions protruding in a columnar shape are arranged on the other surface side of the main body, and the second convex portions are capable of being inserted into the holes of the object to be marked and are arranged at a different interval than the convex portions arranged on the one surface side.

[0012] Even with this configuration, one marking jig can be used for marking objects having different hole intervals.

[0013] In addition, the object to be marked is an annular flange, the plurality of holes are arranged in a thickness direction, and a cylindrical extension portion is extended from an inner peripheral side of one surface, A relief portion is provided on the other surface of the main body, the relief portion being formed to correspond to the shape of the extension portion.

[0014] This means that it can be used on marking objects such as butt-welded flanges, socket-welded flanges, etc., which have a cylindrical extension portion extending from one side of the flange, without interfering with the extension portion. [Brief description of the drawings]

[0015] [Figure 1] 1A is a front view of a scribing jig according to a first embodiment of the present invention, FIG. 1B is a left side view thereof, and FIG. [Diagram 2] FIG. 1A is a perspective view of the embodiment as viewed from the rear side, and FIG. [Diagram 3] FIG. 2 is an explanatory diagram showing a usage mode of the embodiment. [Figure 4] 1A is a perspective view of a scribing jig according to a second embodiment of the present invention, and FIG. 1B is a perspective view of the scribing jig as viewed from the back side. [Diagram 5] FIG. 1A is an exploded perspective view of the embodiment as viewed from the rear side, and FIG. [Figure 6] FIG. 6A is an explanatory diagram showing a usage mode of the embodiment, FIG. 6B is a view taken along the arrow VIb in FIG. 6A, and FIG. 6C is a view taken along the arrow VIc in FIG. [Figure 7]11A is a front view of a scribing jig according to a third embodiment of the present invention, FIG. 11B is a right side view, FIG. 11C is a perspective view seen from the front side, and FIG. [Figure 8] FIG. 1A is an explanatory diagram of a usage mode of the embodiment, and FIG. 1B is an explanatory diagram of a usage mode when used with a flange different from that in FIG. [Figure 9] IXb-IXb sectional view of a marking jig according to a fourth embodiment of the present invention, and FIG. IXb-IXb sectional view of a marking jig according to a fourth embodiment of the present invention. FIG. [Figure 10] FIG. 2 is an explanatory diagram of a usage mode of the embodiment. [Figure 11] FIG. 2 is an explanatory diagram showing the state in which objects to be scribed are joined using the scribing jig of the present invention. [Figure 12] FIG. 11 is an explanatory diagram showing the state in which another object to be marked is joined using the marking jig of the present invention. [Figure 13] FIG. 13 is an explanatory diagram showing a state in which another object to be marked is placed using the marking jig of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] A first embodiment of the marking jig of the present invention will be described with reference to the drawings. In the following description, when arrows are attached to the drawings, F stands for front, B stands for back, R stands for right, L stands for left, U stands for top, and D stands for bottom.

[0017] As shown in Figs. 1 to 3, the scribing jig 10 includes a main body portion 20, two protruding portions 30, and a wire drawing guide portion 40, and is integrally molded from synthetic resin.

[0018] The object to be marked in this embodiment is an annular flange F as shown in FIG. 3, with a plurality of holes Fa arranged in the thickness direction.

[0019] The main body 20 is formed in the shape of a rectangular flat plate having triangular cutouts 21 at the upper right and upper left corners.

[0020] The cutout portion 21 allows the orientation of the marking tool to be visually confirmed.

[0021] The two protrusions 30, 30 are formed so as to protrude in a cylindrical shape from the rear surface (one surface side) of the main body 20, and are arranged with a gap therebetween in the up-down direction. In this embodiment, the protrusions 30 can be inserted into holes Fa arranged concentrically in the flange F.

[0022] The wire drawing guide portion 40 is formed on the upper surface of a through hole that penetrates the main body portion 20 in the front-rear direction. The lower surface side of the through hole is formed to be inclined so that the front part is downward and the rear part is upward.

[0023] As shown in Figure 3, the line drawing guide portion 40 guides a marking means such as a marking needle, a marker pen, etc., and is capable of drawing a marking line perpendicular to the imaginary line L at the midpoint MP of the imaginary line L connecting the centers C of the holes Fa of the flanges F.

[0024] In addition, as shown in Figures 1 and 3, the line drawing guide portion 40 can be said to be capable of drawing a scribe line perpendicular to the midpoint JMP of an imaginary line JL connecting the axial centers JC of the protrusions 30, 30.

[0025] A usage mode of the scribing jig 10 will be described. In this embodiment, the scribing jig 10 is used for joining flanges F as objects to be scribing. As shown in Fig. 3, the flange F is formed in an annular shape, and a plurality of holes Fa are concentrically arranged in the thickness direction.

[0026] As shown in FIG. 3, the protrusions 30, 30 are inserted into any adjacent holes Fa of the flange F until the rear surface of the main body 20 comes into contact with one surface of the flange F in the thickness direction.

[0027] A scribe line is drawn by placing the scribe needle against the wire drawing guide portion 40. At this time, the scribe line is drawn at the midpoint MP of an imaginary line L connecting the centers C of the holes Fa of the flanges F so as to be perpendicular to the imaginary line L.

[0028] The scribe lines are drawn at predetermined intervals, for example, at 90 degree intervals, in the circumferential direction of the flange F. Similarly, scribe lines are drawn at corresponding positions on the other flange F.

[0029] As shown in Figure 11, the flanges F1 and F2 are joined together by welding, bolts and nuts, etc., using the marking lines drawn on each flange F as a reference for positioning, and then the flanges F1 and F2 are joined together. This is effective when attaching a bent pipe P to a tank T in a plant.

[0030] 12, when joining a flange F and a pipe P, a flange unit FU can be manufactured by drawing a scribe line on the flange F, and then drawing a scribe line on the pipe P using a flat square or the like based on the scribe line on the flange F, positioning the flange F and the pipe P together, and then welding, bolt and nut tightening, etc. The flange unit FU can also be joined to a door body D.

[0031] Furthermore, as shown in Figure 13, when multiple flanges F are attached to a tank T of a plant, it is also possible to align them based on the marking lines drawn on each flange F.

[0032] The marking jig 10 having the above configuration is used for a flange F as a marking object having a plurality of holes Fa arranged therein, A main body portion 20, Two projections 30, 30 protruding in a columnar shape from one surface side of the main body 20 with a gap therebetween; A line drawing guide portion 40 is formed by drilling the main body portion 20 and guides the marking means to draw a marking line; Equipped with The protrusions 30, 30 are insertable into holes Fa of a flange F as an object to be marked, The line drawing guide portion 40 is capable of drawing a scribe line perpendicular to an imaginary line L at a midpoint MP of the imaginary line L connecting the centers C of the holes Fa.

[0033] According to this, for example, when two objects to be marked are to be joined facing each other, a marking line can be drawn and the objects can be aligned based on the marking line.

[0034] Here, in the present invention, not only is it physically "the midpoint MP of the virtual line L connecting the centers C of the holes Fa" and "orthogonal to the virtual line L," but it is also meant to include "approximately the midpoint MP of the virtual line L connecting the centers C of the holes Fa" and "approximately perpendicular to the virtual line L" taking into consideration the common technical knowledge at the time of filing, such as dimensional tolerances and product variations due to processing accuracy.

[0035] A scribing jig according to a second embodiment of the present invention will be described. As shown in Figures 4 to 6, in the scribing jig 110 of this embodiment, the main body 120 is composed of a central member 130, and a first member 150 and a second member 170 that are movable relative to the central member 130, and includes a movement mechanism 115 that allows the protrusions 155, 175 to move toward and away from each other by moving the first member 150 and the second member 170.

[0036] The central member 130 includes a first case 131, a second case 140, and a pinion portion 138.

[0037] The first case 131 is made of synthetic resin and formed into a flat hexagonal plate. The first case 131 is provided with an engaging portion 132 that can engage with an engaged portion 146 (described later) of the second case 140. In this embodiment, the engaging portion 132 is composed of a rib that protrudes rearward in a plate shape and a protruding piece that protrudes from the rib.

[0038] Further, the first case 131 is provided with a wire drawing guide portion 133. In this embodiment, the wire drawing guide portion 133 is formed at the upper and lower ends on the inner surfaces of through holes that penetrate the first case 131 in the front-rear direction. The inner surfaces of the through holes that constitute the wire drawing guide portion 133 are formed to be inclined so that the rear portion is narrow and the front portion is wide.

[0039] Furthermore, the first case 131 is provided with a stepped insertion hole 134 penetrating therethrough in the front-rear direction, into which a screw member 180 (described later) can be inserted and into which a nut member 181 (described later) can be disposed.

[0040] 6, the line drawing guide portion 133 is capable of guiding a scribing needle, a marker pen, or the like as a scribing means to draw a scribing line perpendicular to the imaginary line L at the midpoint MP of the imaginary line L connecting the centers C of the holes Fa of the flanges F. In this embodiment, the line drawing guide portion 133 makes it possible to draw a scribing line perpendicular to the imaginary line L by connecting scribing lines drawn above and below.

[0041] In addition, as shown in FIG. 6, the line drawing guide portion 133 can be said to be capable of drawing a scribe line perpendicular to the imaginary line JL at the midpoint JMP of the imaginary line JL connecting the axial centers JC of the convex portions 155 and 175 described later.

[0042] The second case 140 is made of synthetic resin and is formed in a rectangular flat plate shape. The second case 140 includes a wide portion 141 that is formed wide when viewed from the left and right direction, and a narrow portion 145 that is formed narrower and sandwiches the wide portion 141.

[0043] The wide portion 141 is provided with a pinion arrangement portion 142 which is a bottomed hole extending from the rear surface to the front surface and in which a pinion portion 138 (described later) can be arranged. A shaft portion 143 is arranged in the pinion arrangement portion 142 and can be inserted into a shaft hole 139 of the pinion portion 138. The wide portion 141 is also provided with an insertion hole 144 into which a screw member 180 (described later) can be inserted.

[0044] An engaged portion 146 that can engage with the engaging portion 132 of the first case 131 is provided in the narrow portion 145. In this embodiment, the engaged portion 146 is composed of a rib that protrudes forward in a plate shape, and an engaging hole that is formed in the rib as a bottomed hole and can engage with the protruding piece.

[0045] Further, a rack bush 147 is attached to the narrow width portion 145. The rack bush 147 is formed in an elongated cylindrical shape and can be inserted into guide holes 151, 171 of a first member 150 and a second member 170, which will be described later.

[0046] The pinion portion 138 is an existing pinion having a shaft hole 139 .

[0047] The first member 150 and the second member 170 are made of synthetic resin and are formed in a substantially L-shape. The first member 150 and the second member 170 have the same shape when rotated 180 degrees.

[0048] The first member 150 and the second member 170 are provided with guide holes 151, 171, respectively, which penetrate in the front-rear direction in the shape of elongated holes.

[0049] The first member 150 and the second member 170 are provided with mounting cylinder portions 152, 172 to which protrusions 155, 175, which will be described later, can be attached. In this embodiment, the mounting cylinder portions 152, 172 are formed in a cylindrical shape having a flange on the tip side, extend rearward, and have four split grooves formed along the axial direction, so that the diameter can be reduced or expanded.

[0050] The protrusions 155, 175 are rotatably attached to the mounting cylinders 152, 172. In this embodiment, the protrusions 155, 175 are made of metal, formed in an annular shape, and attached by inserting the central holes 154, 174 into the mounting cylinders 152, 172. In this embodiment, the protrusions 155, 175 can be said to protrude in a columnar shape from the first member 150 and the second member 170 via the mounting cylinders 152, 172.

[0051] The first member 150 and the second member 170 are provided with a first rack portion 156 and a second rack portion 176, respectively, which are engageable with the pinion portion 138.

[0052] The assembly mode of the scribing jig 110 will be described. The protrusions 155, 175 are attached to the mounting cylinders 152, 172. The first member 150 and the second member 170 are disposed facing each other between the engagement portions 132, 132 of the first case 131 so that the first rack portion 156 and the second rack portion 176 face each other. Furthermore, the pinion portion 138 is disposed between the first member 150 and the second member 170.

[0053] Then, the second case 140 is placed over the first case 131 so that the shaft portion 143 of the pinion arrangement portion 142 is inserted into the shaft hole 139 of the pinion portion 138 and the rack bushing 147 is inserted into the guide holes 151 and 171 .

[0054] Finally, the screw member 180 is inserted through the insertion hole 144, the stepped insertion hole 134, and the shaft hole 139 of the pinion portion 138, and the nut member 181 is placed in the stepped insertion hole 134. The screw member 180 and the nut member 181 are fastened together, resulting in the state shown in Figs. 4(a) and (b). From the state shown in Figs. 4(a) and (b), the first member 150 and / or the second member 170 are manually operated, whereby the movement of the first rack portion 156 and the second rack portion 176 is transmitted to the pinion portion 138, and the first member 150 and the second member 170 approach and move away from each other. Accordingly, the protrusions 155 and 175 approach and move away from each other.

[0055] From the above, it can be said that the marking jig 110 comprises a first rack portion 156 arranged on the first member 150, a second rack portion 176 arranged on the second member 170, and a pinion portion 138 arranged rotatably with respect to the central member 130 and engaging with the first rack portion 156 and the second rack portion 176, and is equipped with a moving mechanism 115 that enables the convex portions 155, 175 to move closer to and away from each other as the first member 150 and the second member 170 move.

[0056] In the scribing jig 110 having the above-described configuration, the main body 120 is composed of a central member 130, and a first member 150 and a second member 170 that are movable relative to the central member 130. One of the convex portions 155 is disposed on one surface side of the first member 150, and the other of the convex portions 175 is disposed on one surface side of the second member 170, a first rack portion 156 disposed on the first member 150, a second rack portion 176 disposed on the second member 170, and a pinion portion 138 rotatably disposed with respect to the central member 130 and engaging with the first rack portion 156 and the second rack portion 176; The first member 150 and the second member 170 are moved to move the protrusions 155, 175 toward and away from each other, thereby providing a movement mechanism 115.

[0057] This allows the marking tool to be used in correspondence with flanges F as objects to be marked that have holes Fa spaced at different intervals.

[0058] A scribing jig according to a third embodiment of the present invention will be described. In the following description, the configurations corresponding to those in the first embodiment are designated by the same reference numerals with the letter A added thereto, and the description thereof will be omitted in whole or in part.

[0059] As shown in Figs. 7 and 8, the scribing jig 10A has two second protruding portions 60A that protrude like columns arranged on the front surface side (the other surface side) of the main body portion 20A.

[0060] The second protrusions 60A are insertable into holes Fa of the flange F as the object to be marked, and are disposed at a different interval from the protrusions 30A disposed on the rear surface side (one surface side). In other words, the second protrusions 60A are disposed so as to be insertable when the holes Fa of the flange F are set at an interval different from that of the protrusions 30A.

[0061] Even if either the protruding portion 30A or the second protruding portion 60A is inserted into the hole Fa of the flange F, the wire drawing guide portion 40A can be used.

[0062] The second convex portion 60A is positioned to guide a marking means such as a marking needle, a marker pen, etc., so that a marking line can be drawn perpendicular to the imaginary line L at the midpoint MP of the imaginary line L connecting the centers C of the holes Fa of the flanges F.

[0063] In addition, the line drawing guide portion 40A can be said to be arranged in a position where it is possible to draw a scribe line perpendicular to each imaginary line JL at the midpoint JMP of each imaginary line JL connecting the axial centers JC of the convex portions 30A and the axial centers JC of the second convex portions 60A.

[0064] Even with this configuration, one marking jig can be used with the intervals of the holes Fa corresponding to the flanges F.

[0065] A scribing jig according to a fourth embodiment of the present invention will be described. In the following description, the configurations corresponding to those of the first embodiment are designated by the same reference numerals with the letter B added, and the description thereof will be omitted in whole or in part.

[0066] In this embodiment, the object to be marked is an annular flange F, which has a plurality of holes Fa arranged in the thickness direction and a cylindrical extension portion Fb extending from the inner periphery of one surface.

[0067] 9 and 10, the scribing jig 10B has a relief portion 22B formed to correspond to the shape of the extension portion Fb and disposed on the front surface (the other surface) of the main body portion 20B. In this embodiment, the relief portion 22B includes a vertical wall portion 22Ba formed to correspond to the peripheral wall of the extension portion Fb, and a horizontal wall portion 22Bb extending from the vertical wall portion 22Ba substantially parallel to the main body portion 20B.

[0068] With this configuration, it can be used without interfering with the extension Fb on a marking object such as a butt-welded flange or a socket-welded flange, which has a cylindrical extension Fb extending from one side of the flange F. In other words, it is possible to prevent the main body 20B from hitting the extension Fb and preventing the protrusion 30B from being inserted into the hole Fa.

[0069] The scribing jig of the present invention is not limited to the above-mentioned configuration, and various design modifications are possible without departing from the gist of the present invention.

[0070] For example, the objects to be marked were flanges and pipes with holes formed therein, but the present invention can be applied to other components as long as a marking line can be drawn on them.

[0071] In addition, the interval between adjacent holes in the object to be marked can be changed as appropriate, and the interval between the convex portion and the second convex portion can also be changed as appropriate.

[0072] Furthermore, the shape of the line drawing guide portion can be changed appropriately depending on the scribing means used for drawing the line.

[0073] Furthermore, although the moving mechanism is of the rack and pinion type, other types of existing moving mechanisms can be used.

[0074] Furthermore, the scribing jigs in the first to fourth embodiments are made of synthetic resin, and the protrusions 155, 175 in the second embodiment are made of metal, but they can be formed of other materials as appropriate depending on the usage.

[0075] Furthermore, the shape of the scribing tool can be changed as appropriate depending on the manner of use. [Explanation of symbols]

[0076] 10. Marking tool 20 Main body 21 Notch 30 Convex 40 Wire drawing guide part 10A Scribing tool 20A Main Unit 30A Convex 40A Wire drawing guide part 60A Second protrusion 10B Marking jig 20B Main body 22B Relief 30B Convex 40B Wire drawing guide part 110 Marking jig 115 Moving mechanism 120 Main body 130 Central member 138 Pinion 150 First Component 155 Convex 156 First Rack Section 170 Second member 175 Convex 176 Second Rack Section F flange Fa hole Fb extension part C center L Virtual Line MP midpoint

Claims

1. Used for marking objects having a plurality of holes, A main body portion, Two projections protruding in a columnar shape from one surface side of the main body with a gap therebetween; a line drawing guide portion formed by drilling the main body portion and configured to guide a marking means to draw a marking line; Equipped with The protrusion is insertable into the hole of the object to be marked, The marking tool is characterized in that the line drawing guide portion is capable of drawing the marking line at the midpoint of an imaginary line connecting the centers of the holes so as to be perpendicular to the imaginary line.

2. The main body portion is composed of a central member, and a first member and a second member that are movable relative to the central member, one of the protruding portions is disposed on one surface side of the first member, and the other of the protruding portions is disposed on one surface side of the second member, a first rack portion disposed on the first member, a second rack portion disposed on the second member, and a pinion portion rotatably disposed on the central member and engaging with the first rack portion and the second rack portion, The marking jig according to claim 1, further comprising a moving mechanism that moves the first member and the second member to move the protrusions closer to and away from each other.

3. The marking jig described in claim 1, characterized in that two second convex portions protruding in a columnar shape are arranged on the other surface side of the main body, the second convex portions are insertable into the holes of the object to be marked and are arranged at a different interval than the convex portions arranged on the one surface side.

4. The object to be marked is an annular flange, the holes are arranged in a thickness direction, and a cylindrical extension portion is extended from an inner peripheral side of one surface of the flange, 2. The marking jig according to claim 1, wherein a relief portion is provided on the other surface of the main body portion so as to correspond to the shape of the extension portion.

Images