JP2015116636A - Through-core marking jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment which enables the marking of existing piping alone and easily and a marking method using the same.SOLUTION: This invention relates to a through-core marking jig which consists of a body L-shaped by the right-angle combination of a first plate 3, having a width and a length which enable stable installation on object piping 2 that is a marking object, with a second plate 4 coming in contact with the side face of the object piping 2, and a leveling instrument 5 installed on the first plate 3 and is provided with marks 7a, 8a indicating a distance equivalent to the outer radius of the object piping measured from a base point 6 on the end face 3a of the first plate and the end face 4a of the second plate, and a through-core marking method.

Description

  The present invention relates to a jig for marking the core of existing piping.

  In piping work, especially small-diameter pipe construction and remodeling work for local adjustment, the position of existing piping must first be accurately grasped. For this purpose, it is necessary to accurately mark the core of the pipe at the site.

  Conventionally, one worker is assigned to the upper part and one side of the pipe marking the deposit, and one end of the deposit applied to the upper part of the pipe is kept horizontal using a level, The distance corresponding to the outer radius of the pipe was measured using a straight scale in the horizontal direction from the deposit applied to the side surface, and the lead was determined by marking there.

  Therefore, it is unavoidable that it is a two-person work of a person who keeps one end of the payment level and a person who performs marking, and not only the number of necessary workers increases, but also in a narrow part where two workers are difficult to enter There was a problem that the work was difficult.

  Conventionally, there have been many inventions for marking the insertion dimension or the like of the pipe into the socket as in Patent Document 1 and Patent Document 2, but there is no mark for marking the core.

JP 2011-148017 A JP 2010-155296 A

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  The problem to be solved is to provide a jig capable of easily and easily marking existing piping and a marking method using the jig.

  The present invention for solving the above problems is a first plate member having a width and a length that can be stably placed on a pipe (hereinafter referred to as “target pipe”) that is substantially horizontally arranged to be marked; It consists of a main body that is L-shaped by combining the second plate that contacts the side surface of the target pipe at a right angle, and a level that is installed on the first plate, and on the end surface of the first plate The core marking jig is provided with a mark indicating a distance corresponding to the outer radius of the target pipe measured from the inside of the second plate member.

  Since the first plate has a width that can be stably placed when placed on the target pipe, unlike the conventionally used insert, even if the target pipe is arranged with a slight inclination, When placed on top, it will not tilt or fall down in the direction of the tube axis. Also, one end of the first plate combined with the second plate is heavier by that amount and tends to fall due to the rotational moment, but the left and right rotational moments are almost equal when placed on the target pipe. By extending the other end of the first plate so that the first plate has an appropriate length as a whole, the target pipe can be obtained only by its own gravity and frictional force without being supported by the operator by hand. The posture can be kept stable on the top.

  The worker applies the first plate member to the upper part of the target pipe, the second plate member to one side of the target pipe, and horizontally places the first plate member while observing the bubble level of the level installed on the first plate member. Adjust so that Since the core marking jig according to the present invention can be stably maintained only by gravity and frictional force when installed on the target pipe as described above, the first plate is in a horizontal state. The worker can then release his hand and move on to marking.

  By measuring the distance corresponding to the outer radius of the target pipe from the inside of the second plate combined in an L shape and providing a mark on the end face of the first plate, it is not necessary to take out the scale again. Since it is only necessary to mark the target pipe in accordance with the position, it is easy to work alone from the setting of the core marking jig to the marking as in the present invention.

  The target pipe that can be handled by one core marking jig as in the present invention is not limited to one having a single diameter. For example, the 150A pipe with the A name has an outer diameter of 165.2 mm, and the 200A pipe has an outer diameter of 216.3 mm. Therefore, the marks corresponding to the outer radii of 82.6 mm and 108.2 mm are first marked. Either can be accommodated by providing it on the end face of the plate material. However, when the core marking jig according to the present invention made for 150A pipe is used for pipes with greatly different outer diameters, for example, 500A pipe, there is a large difference in the left and right rotational moments. Since it cannot be stably placed on the target pipe only by the frictional force, there is a limit to the range of the target pipe that can be handled by one core marking jig as in the present invention.

  Note that the L-shaped main body combining the two plates can be easily and stably placed on the target pipe, so the level can be fixed on the first plate or simply placed Just fine.

  Further, the present invention is the core marking jig according to claim 1, wherein the end surface of the second plate member indicates a distance corresponding to the outer radius of the target pipe measured from the inside of the first plate member. As shown in FIG.

  By providing a mark indicating the outer radius of the target pipe on the second plate member, not only the core on the plane but also the core in the height direction can be easily marked.

  Moreover, this invention is the method of marking a lead to the said object piping using the lead marking jig as described in Claim 1 or Claim 2. By using this method, the worker can easily mark the core of the existing piping by himself / herself.

  By using the core marking jig as in the present invention, one worker can easily mark existing piping. Not only the horizontal core on the plane but also the vertical core can be easily marked. As a result, not only can the number of workers be reduced, but the marking operation can be easily performed even in a narrow area where two workers cannot enter.

It is a front view of the Example of the core marking jig according to the present invention. It is the AA arrow line view. It is explanatory drawing of the method of marking a lead using a lead marking jig as this invention.

  Embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to such an embodiment, and it goes without saying that various modifications may be made to the specific structure within the scope of the present invention.

  FIG. 1 is a front view of an embodiment of a core marking jig according to the present invention, FIG. 2 is an AA arrow view thereof, and FIG. 3 is a method of marking a core using a core marking jig. It is explanatory drawing. The main body of the core marking jig 1 is attached to the first plate member 3 horizontally placed on the target pipe 2 for marking the core, and is attached to one end thereof at a right angle with high accuracy. It consists of an L-shaped structure which consists of the 2nd board | plate material 4 attached.

  The width W and the length L of the first plate 3 are selected to dimensions that can be stably placed on the target pipe 2 as described above. On the other hand, the width of the second plate member 4 is not particularly limited, and the length may be a length that can contact the side surface of the target pipe 2, that is, a length that exceeds the outer radius of the target pipe 2. Needless to say, it is necessary to assemble the two at right angles with high accuracy.

  A level 5 is installed on the first plate 3 in order to keep the first plate horizontal when the core marking jig is placed on the target pipe 2 to perform the marking operation. If the level plate 5 is not fixed to the first plate member 3 but is simply placed on the first plate member 3, the left and right rotational moments can be easily adjusted when the core marking jig 1 is placed through the target pipe 2. On the other hand, if the level 5 is fixed to the first plate member 3, even if an unexpected situation occurs, only the level 5 does not fall.

  The inner side of the intersection of the first plate member and the second plate member combined in an L shape, that is, the distance corresponding to the outer radius of the target pipe 2 from the base point 6 in FIG. 1 is measured on the end surface 3a of the first plate member. Marks 7a, 7b, 7c,... Are provided. For example, a mark 7a with an outer radius of 82.6 mm away from the base point 6 for a 150A pipe, a mark 7b with an outer radius of 95.4 mm away for a 175A pipe, and a 200A pipe In this case, a mark 7c with an outer radius of 108.2 mm is provided. In order to correspond to a plurality of pipes in this way, it is desirable to clearly add the pipe size to each mark as shown in FIG.

  Similarly, marks 8 a, 8 b, 8 c,... Are provided on the end surface 4 a of the second plate member 4 by measuring a distance corresponding to the outer radius of the target pipe 2 from the base point 6. Again, it is desirable to append the pipe size to each mark.

  In performing the marking operation, as shown in FIG. 3, the core marking jig 1 is placed on the upper surface of the target pipe 2 as shown in the present invention, and the bubble of the level 5 is placed along the side surface of the second plate member 4. Looking at 5a, first, the plate 3 is kept horizontal. Since the core marking jig 1 is stably maintained in this state, the worker releases his hand from the core marking jig, and a predetermined mark, in this case, the target pipe 2 is 150A. If the mark 2a is engraved on the pipe in accordance with the corresponding mark 7a, it indicates the exact position of the core 9a on the plane of the target pipe 2. Similarly, if the mark 2b is engraved along with the mark 8a, it indicates the exact position of the core 9b in the height direction of the target pipe 2.

  This series of operations can be completed by yourself without the need for other people. Marking work can be easily performed even in a narrow part where two workers cannot enter.

DESCRIPTION OF SYMBOLS 1 Core marking jig 2 Target pipe 2a, 2b Core mark 3 1st board material 3a The end surface 4 The 2nd board material 4a The end surface 5 Level 6 Basic point 7a, 7b, 7c, ... Mark which shows an outer radius 8a, 8b, 8c ... Same as above 9a Core on the plane of the target pipe 9b Core in the height direction of the target pipe

Claims (3)

  A first plate member having a width and a length that can be stably placed on a pipe (hereinafter referred to as “target pipe”) that is to be marked substantially horizontally disposed, and a first plate member that contacts the side surface of the target pipe A main body that is L-shaped by combining the two plate members at right angles, and a level installed on the first plate member, from the inside of the second plate member to the end surface of the first plate member A core marking jig having a mark indicating a distance corresponding to the measured outer radius of the target pipe.   It is a core marking jig as described in Claim 1, Comprising: As the mark which shows the distance corresponded to the outer radius of the said object piping measured from the inner side of the said 1st board | plate material was provided in the end surface of the said 2nd board | plate material. Core marking jig.   A method of marking a lead on the target pipe using a lead marking jig as claimed in claim 1 or 2.

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