JP5298843B2 - Marking jig for piping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-use marking jig reduced in cost by simplifying a structure. <P>SOLUTION: The marking jig 10 is made of a flexible belt shaped member 11 and includes a hook part 12 for hooking an end part of a pipe 1 to be connected at the vicinity of one end thereof. On a side in a position with a prescribed distance spaced from the hook part 12, a marking part 14 is provided which has marking holes 13a and 13b for showing a position of an inserting dimension of the pipe set in a pipe fitting. A plurality of marking holes 13a and 13b used for the plurality of pipe fittings may be used. When the marking holes are applied to a bite type pipe fitting, marking holes 13aa, 13ba, 13ab and 13bb as slots may be formed for showing the positions of outer end parts of a connecting member during the start of a fastening operation and during the completion of fastening operation of the connecting member. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a piping marking jig, and more particularly, to a piping marking jig that allows an insertion dimension to a pipe joint to be visually observed with respect to a pipe connected by the pipe joint.

  Generally, when piping is connected by a pipe joint, it is necessary to insert the piping to be connected to a predetermined position set in advance. For this reason, a step is provided at the pipe insertion port into which the pipe to be connected is inserted, and it is confirmed that the tip of the pipe to be connected has come into contact with the step by sound or hand feeling. To connect.

  FIG. 9 shows a conventional bite type pipe joint having such a structure, which is an example described in Patent Document 1, for example. As shown in this figure, the joint main body 110 has a male threaded cylinder part 112 formed on the outer periphery with a male threaded part 111 for screwing the coupling member 120, and a pipe plug is inserted in the center of the male threaded cylinder part 112. A port 113 and a communication hole 114 continuous therewith are provided. A step portion 115 is formed as a restricting portion for restricting the tip position of the pipe 100 to be connected at the boundary between the pipe insertion port 113 and the communication hole 114. In addition, a cam surface 116 that closely contacts the front edge of the ferrule 130 is formed at the inlet of the pipe insertion port 113.

  Further, the coupling member 120 has a female screw cylinder part 122 formed on the inner peripheral surface of a female screw part 121 screwed to the male screw part 111, and a pipe through hole 124 is formed at the center of the side wall 123 of the female screw cylinder part 122. Is formed. A pressing surface 125 that presses the rear end portion of the ferrule 130 is formed on the inner side surface of the female screw cylindrical portion 122. Further, a ferrule 130 is formed inside the internal thread cylinder portion 122 of the coupling member 120 so as to be integrally connected to the side wall 123 of the internal thread cylinder portion 122 by a radially thin portion 126.

  The ferrule 130 has a pipe insertion hole 131 at the center, and a notch 132 is formed in the front part from the inner peripheral surface of the pipe insertion hole 131. And the corner | angular part of the rear surface of this notch 132 and the internal peripheral surface of the piping penetration hole 131 forms the edge part 133 which bites into the piping which should be connected. The front end portion 134 in front of the notch 132 is formed so as to be wedged between the pipe 100 to be connected at the beginning of the coupling member 120 and the pipe insertion port 113 to temporarily hold the pipe 100. ing.

  When connecting a pipe with a bite type pipe joint configured in this manner, the coupling member 120 is usually fastened after the pipe 100 is inserted until the tip of the pipe 100 abuts against the step 115 as shown in FIG. Then, they are connected as shown in FIG. However, in this case, it may not always be easy to obtain a feel as to whether or not the tip of the pipe 100 is in contact with the stepped portion 115. For this reason, as shown to Fig.10 (a), it may happen that the front-end | tip of the piping 100 is connected in the state which does not contact | abut to the preset step part 115. FIG. In this case, as shown in FIG. 10B, when the coupling member 120 is tightened, the pipe 100 may escape toward the step portion 115, and the amount of biting of the edge portion 133 of the ferrule 130 may be insufficient. . In addition, since a gap is generated between the tip of the pipe 100 and the step portion 115 when the pipe connection is completed, the tip of the pipe 100 is not supported by the step portion 115 when an unbalanced load that pushes the pipe 100 to the side occurs. The airtightness due to the biting of the edge portion 133 may be deteriorated by the bending force acting on the pipe 100. For this reason, it is recognized that it is important to display the insertion dimension of the pipe inserted into the pipe joint using a marking jig in advance by displaying the position on the pipe.

By the way, as a marking jig which can visually check the position of the insertion dimension of such a pipe, the one shown in FIG. As shown in FIG. 11, the marking jig 200 has a strip shape having an elongated plate portion 201, and a hook portion for hooking the end surface of the pipe 100 to be connected to the distal end of the elongated plate portion 201. 202 was formed. Further, the elongated plate portion 201 was formed with a notch groove 203 at a position away from the hook portion 202 by a predetermined distance. This notch groove 203 is inserted into a plurality of pipe joints set in the plurality of pipe joints in order to be shared by a plurality of pipe joints having different insertion dimensions of the pipe 100 set depending on the diameter of the pipe 100 to be connected. A plurality of dimensions were provided so as to display the dimensions. The operation of displaying the position of the insertion dimension of the pipe was performed as follows. First, the hook portion 202 is hooked on the end surface of the pipe 100 and the elongated plate portion 201 is brought into contact with the outer peripheral surface of the pipe 100. Next, the tip of the writing instrument is fitted into a notch groove 203 for indicating the position of the insertion dimension of the pipe set in the pipe joint, and the marking jig is moved relative to the pipe 100 while rotating relative to the pipe 100. There was a mark against it.
Japanese Patent Laid-Open No. 2007-232210, FIG. Japanese Patent Laid-Open No. 2007-152513, FIG.

  However, in general, the marking jig is necessary when connecting the pipe, but once the pipe is connected, it is not necessary. Therefore, a marking tool that is as simple and low-cost as possible is desired so that it can be used only on the spot. ing. From this point of view, the above-described conventional marking jig 200 is configured in a three-dimensional shape in which the hook portion 202 at the tip is bent in the radial direction of the pipe 100. For this reason, since the manufacturing cost including the mold for manufacturing the marking jig 200 increases, there remains room for improvement.

The present invention has been made paying attention to such problems existing in the prior art, and in particular, by adopting a simplified structure in a piping marking jig used for a bite type pipe joint. An object of the present invention is to provide a marking jig that can reduce costs and is easy to use.

A pipe marking jig according to the present invention includes a pipe main body having a pipe insertion port and a cam surface provided with a restricting portion that regulates a tip position of a pipe to be connected, and a coupling member screwed into the joint main body. , A pipe marking jig used in a bite type pipe joint having a ferrule pressed against the coupling member and having a leading edge in close contact with the cam surface, comprising a flexible strip plate-like member, A hooking part consisting of a punched hole is provided so as to hook the end of the pipe to be connected in the vicinity, and the position of the insertion dimension of the pipe set in the pipe joint is located at a predetermined distance from this hooking part. A marking portion having a mark hole which can be displayed , and further, the marking portion is formed on an outer side of the bite type pipe joint in a fastening start state of the coupling member in which a front edge of the ferrule is in contact with the cam surface. end Characterized in that it comprises a mark hole located and can be displayed in, and a mark hole that allows displaying the position of the outer end portion of the bite type pipe coupling in engagement completion state of the coupling member.

If comprised in this way, since a marking jig | tool becomes a flat plate-like structure which provided the punching hole in the strip | belt-plate-shaped member, it becomes a simplified structure and a production type | mold is also simplified easily with a punching type | mold. Therefore, it can contribute to the cost reduction of the marking jig. In addition, in a bite type pipe joint, it is necessary to insert the tip of the pipe to be connected into the pipe insertion port through the pipe through hole of the coupling member or the pipe insertion hole of the ferrule. In some cases, it is difficult to determine whether or not is in contact with the restriction portion of the pipe insertion port by sound or touch. However, proper insertion can be easily performed by using such a marking jig. Further, since it is possible to confirm whether or not the insertion dimension of the pipe is appropriately formed both before and after the coupling member is fastened, it is possible to further ensure the insertion dimension. it can.

  The hooking portion includes an engagement hole portion that engages with an end portion of the pipe to be connected, and an inlet cutout portion having a side notch so as to guide the end portion of the pipe to be connected to the engagement hole portion. It is preferable to comprise so that it may consist of. If comprised in this way, since the edge part of piping will be guided to an engagement hole part from an entrance notch part, and it can hold stably in the position, a position is easily displayed using a mark hole with a writing instrument etc. be able to.

  Further, the inlet notch is a notch with a constant width cut in a direction perpendicular to the side, and the engagement hole is a hole with a constant width extending in parallel to the side from the tip of the entrance notch. It is preferable to configure so as to be a part. If comprised in this way, the edge part of piping can be stably hold | maintained in an engagement hole part, although it is a simple structure.

  Moreover, it is preferable that the width dimension of the said engagement hole part is larger than the width dimension of the said entrance notch part, and is larger than the thickness of the piping which should be connected. By doing this, the band plate-like member on which the marking portion is formed can be easily arranged along the surface of the pipe by twisting the band plate-like member at this hooking portion, and the position of the pipe insertion dimension Marking work for displaying is facilitated.

  The mark hole may be a long hole cut in a direction perpendicular to the side. If comprised in this way, since the insertion position of piping can be displayed with the straight line extended in the circumferential direction with a writing instrument, it can make it easy to see the displayed position.

  The mark hole may be a hole that is not cut out on the side. In this way, the mark for entering and displaying the insertion position of the pipe fits in the mark hole, so that the mark is less likely to be displayed shifted from the predetermined position. Moreover, since the side piece is not cut out, the strength of the strip plate member is improved.

  In addition, the marking portion can display the positions of the insertion dimensions of the pipes set in the plurality of pipe joints so as to be shared by a plurality of pipe joints having different insertion dimensions of the pipes to be connected. It is preferable to have a mark hole. If comprised in this way, a marking jig can be shared with respect to a some pipe joint, and the cost reduction effect can be brought further.

  The plurality of mark holes are preferably formed in a distributed manner on both sides of the band plate member or in the vicinity thereof. If comprised in this way, since several marks can be arrange | positioned at distance, the mistake by misidentification can be reduced. Further, the mark holes constituting the marking portion are dispersed on both sides of the strip plate member, and the strength deterioration of the strip plate member can be prevented.

  Moreover, it is preferable that the said strip | belt-plate-shaped member is formed with the flexible plastic plate. If comprised in this way, a cheap and durable marking jig can be provided and handling will also become easy.

  Further, the marking portion includes a mark hole that can display a position of the outer end portion of the bite type pipe joint in the fastening start state of the coupling member, and an outer end portion of the bite type pipe joint in the fastening completion state of the coupling member. It is also possible that the mark hole whose position can be displayed is formed by a continuous hole. If comprised in this way, the position of the outer side edge part of the bite type pipe joint in the fastening start state and the position of the outer side edge part of the bite type pipe joint in the fastening completion state of the coupling member can be displayed by one entry operation. .

  The marking part is a mark for indicating the position of these two types of pipe insertion dimensions so that the pipe insertion dimensions set according to the diameter of the pipe to be connected can be shared by a plurality of pipe joints integrated into two types. It is preferable that the two types of mark holes are formed separately on the two sides of the band plate member. If comprised in this way, the common range of a marking jig can be expanded and cost reduction can be performed. Further, by providing the mark holes in a dispersed manner, it is possible to prevent a confusion such as making a mistake in which of the pipe diameters is the mark hole.

  Further, the marking portion may be displayed so that a pipe size applied in the vicinity of the mark hole can be understood. If comprised in this way, the mistake by the mistake of the usage method of a marking jig which makes a mistake in the hole for a mark can be reduced.

Since the marking jig according to the present invention has a flat plate-like structure in which punching holes are provided in the band plate-like member, it has a simplified structure, and the production die is often simplified by the punching die. Therefore, it can contribute to the cost reduction of the marking jig. In addition, when used for a bite type pipe joint, it is possible to confirm whether or not the insertion dimension of the pipe is properly made both before and after the coupling member is fastened. Can be ensured.

Hereinafter, a marking jig 10 according to an embodiment of the present invention will be described with reference to the drawings.
A marking jig 10 according to the present embodiment is a thin strip-like member 11 as shown in FIGS. 1 and 2, and is formed of a flexible plastic plate. The width dimension of the strip plate member 11 is not extremely small as compared with the pipe 1 to be connected, and is not so large as to be extremely large. Further, the thickness is such that when the strip plate member 11 is arranged along the longitudinal direction of the pipe 1 to be connected, it can be bent in the circumferential direction along the surface of the pipe 1. And soft. And the hook part 12 is formed so that the edge part of the pipe 1 to be connected in the vicinity of one end is hooked, and the pipe 1 to be connected to the side at a position away from the hook part 12 by a predetermined distance. A marking portion 14 having mark holes 13a and 13b capable of displaying the position of the insertion dimension with respect to the pipe joint is provided.

  As shown in FIG. 1A, the hooking portion 12 includes an engagement hole portion 12a that engages with an end portion of the pipe 1 to be connected, and an end portion of the pipe 1 that is to be connected to the engagement hole portion 12a. And an entrance notch 12b whose side is notched so as to guide the. The entrance notch 12b is a notch having a constant width that is cut in a direction perpendicular to the side. Further, the engagement hole portion 12a is formed in a hole portion having a constant width extending in parallel with the side edge from the tip of the inlet notch portion 12b. Moreover, the width dimension of the engagement hole part 12a is larger than the width dimension of the inlet notch part 12b, and larger than the thickness of the pipe 1 to be connected. Thereby, as shown in FIG. 2, the marking jig 10 is piped so that the center of the strip-like member 11 that is twisted in the circumferential direction in the vicinity of the hook 12 and extends in the longitudinal direction is along the longitudinal direction of the pipe 1. 1 can be easily arranged.

  The marking portion 14 includes mark holes 13a and 13b that can display the position of the insertion dimension of the pipe 1 set in the pipe joint. In this embodiment, the mark holes 13a, 13b are formed from mark holes 13aa, 13ab, 13ba, 13bb which are long holes of a constant width cut out in a direction perpendicular to the side. Further, as shown in FIG. 3, the width dimension of the mark holes 13aa, 13ab, 13ba, 13bb, which is a long hole, is formed so that the tip of the writing tool 15, such as a pencil or a marking pen using dye ink, can enter. Has been.

  Further, the mark holes 13a and 13b are formed with a plurality of types for indicating positions of the insertion dimensions of the pipes set in the plurality of pipe joints. In this embodiment, the mark holes 13 a and 13 b correspond to the insertion dimensions of two types of pipes, and are formed in a distributed manner on both sides of the strip plate member 11. Thereby, the marking jig can be shared for two types of pipe joints having different pipe insertion dimensions. Incidentally, the mark hole 13a is applied to a pipe joint having a large pipe diameter and a large pipe insertion dimension, and the mark hole 13b is applied to a pipe joint having a small pipe diameter and a small pipe insertion dimension. is there.

  In this embodiment, the mark holes 13a and 13b are for bite type pipe joints to be described later. The markings for indicating the positions of the insertion dimensions of the pipes by the mark holes 13a and 13b are performed in two series as shown in FIG. That is, one is a mark 4 indicating the outer position of the coupling member in the fastening start state of the coupling member, where the front edge of the ferrule is in contact with the coupling member of the bite type pipe joint, and the other one is It is the mark 5 which shows the outer side position of the coupling member in the fastening completion state of the coupling member which has completed the coupling member. Accordingly, the mark holes 13a and 13b corresponding to the two types of insertion dimensions are long holes for displaying the position of the outer end portion of the bite type pipe joint 2 in the fastening start state as shown in FIG. Mark holes 13aa, 13ba and mark holes 13ab, 13bb which are long holes for displaying the position of the outer end portion of the bite type pipe joint 2 in the fastening completion state are provided. In addition, in this specification, when referring to the pipe insertion position in the fastening start state, it means the outer position of the coupling member in the fastening start state of the above-described coupling member, and when referred to as the pipe insertion position in the fastening completion state, It shall mean the outer position of the coupling member in the above-mentioned fastening completion state of the coupling member.

  The mark holes 13a and 13b corresponding to the two types of insertion dimensions are formed so as to be shared by the bite type pipe joint 2 that connects the pipes 1 having two diameters. Specifically, the mark hole 13b formed at a short distance from the pipe end is made common to the two bite type pipe joints 2 connecting the pipes 1/4 inch or 3/8 inch. The Further, the mark hole 13a formed at a long distance from the pipe end is commonly used for 1/2 inch and 5/8 inch pipes. As described above, each of the mark holes 13a and 13b is made common to the pipes 1 having two types of diameters. The length of the pipe insertion port in the bite type pipe joint 2 is based on the pipe having the larger diameter. It is obtained by defining. Therefore, it is possible to form a common marking portion on the basis of the length of the pipe insertion port required for the 5/8 inch pipe 1 with respect to the above-mentioned four types of diameter pipes. In this case, there arises a problem that the pipe joint for a pipe having a small diameter becomes too large. Therefore, the pipes having two diameters are made common as described above.

  Here, the pipe insertion position in the fastening start state and the pipe insertion position in the fastening completion state will be described based on FIG. 5, FIG. 6, and FIG. FIG. 5 is a perspective view of a bite type pipe joint, and is a diagram showing a fastening start state of the coupling member in which the front edge of the ferrule abuts upon fastening of the coupling member. FIG. 6 is a partial cross-sectional view of a bite type pipe joint, and is a diagram showing a fastening start state of the coupling member in which the front edge of the ferrule is in contact with the coupling member. FIG. 7 is a partial cross-sectional view of the bite-in type pipe joint, and is a state where the coupling member is completely fastened and the coupling member is completely fastened.

  As shown in these drawings, the bite type pipe joint 2 is fixed to the pipe 3 of the connected apparatus on one end side, but as a connection mechanism for connecting the pipe 1 to be connected on the other end side, A joint body 20, a coupling member 30 coupled to the coupling body 20, and a ferrule 40 that is pressed against the cam surface of the coupling body 20 by the coupling member 30 are provided.

  The joint body 20 is formed with a socket portion 21 for fixing the pipe 3 of the connected device on one end side, and a cylindrical female screw tube portion 22 on the other end side. A female screw portion 23 to be screwed is formed. Further, the side base 24 of the female screw cylinder portion 22 is formed with a pipe insertion port 26 provided with a step portion 25 for abutting the tip of the pipe 1 to be connected, and the ferrule 40 is formed at the inlet portion. A cam surface 27 is formed to closely contact the leading edge. The pipe insertion port 26 is connected to the pipe 3 of the connected apparatus via the step portion 25.

  On the other hand, the coupling member 30 to be screwed into the joint body 20 is a general fastener when the coupling member 30 is fastened with the pipe connection portion 32 having the male screw portion screwed to the female screw portion 23 formed on the outer periphery. It is comprised from the holding part 33 in which the external shape was formed in the hexagonal nut shape so that it can be used. And the pipe connection part 32 and the holding part 33 are connected via the thin annular connection part 34, and the piping through-hole 35 is formed in the center part. As shown in FIG. 7, the annular coupling portion 34 is configured to be cut by the action of the fastening torque when the fastening of the coupling member 30 is completed.

  In addition, a temporary holding engagement portion 36 that protrudes radially inward is formed at the end of the pipe connection portion 32 of the coupling member 30, and a diameter-enlarged recess 38 is formed on the anti-joint body side. Yes. Further, a pressing surface 37 that presses the rear end portion of the ferrule 40 is formed on the end surface on the center side of the pipe connecting portion 32, that is, the end surface around the pipe through-hole 35.

  The ferrule 40 is formed independently from the joint body 20 and the coupling member 30, and projects radially outward at the rear end portion to the temporary holding engagement portion 36 of the pipe connection portion 32 of the coupling member 30. A temporary holding engaging portion 41 to be engaged is formed. The temporary holding engaging portion 41 is engaged with the temporary holding engaging portion 36 of the pipe connecting portion 32 of the coupling member 30 and is inserted into the enlarged diameter concave portion 38, so that the ferrule 40 is connected to the coupling member 30. It is formed so that it may be temporarily held by. Further, by temporarily holding the ferrule 40 on the coupling member 30, the ferrule 40 and the coupling member 30 are integrally handled at the component stage, and management and handling as a component is simplified.

  Further, the ferrule 40 is formed with cuts 43 and 44 from the inner peripheral surface side of the pipe insertion hole 42 toward the radially outer side at the front portion and the rear portion. The notch 43 in the front portion is formed by inserting the coupling member 30 by hand tightening between the pipe 1 to be connected and the inner peripheral surface of the pipe insertion port 26 at the initial stage of fastening of the coupling member 30. The front end 45 existing on the front side is inserted in a wedge shape so that the pipe 1 is temporarily held. The rear notch 44 is formed to increase the amount of biting of the rear edge portion 46 formed at the corner between the inner peripheral surface of the pipe insertion hole 42 of the ferrule 40 and the rear end surface of the ferrule 40. . The front edge portion 47 is formed at the corner between the inner peripheral surface of the pipe insertion hole 42 and the rear side surface of the front cut 43.

  Next, the pipe insertion position in the above-described fastening start state and the pipe insertion position in the fastening completion state will be specifically described while explaining a method of connecting the pipe 1 in the bite type pipe joint 2 configured as described above. First, in a state where the coupling member 30 is loosely screwed to the joint body 20, the pipe 1 to be connected is inserted into the pipe insertion port 26 via the pipe through hole 35 of the coupling member 30 and the pipe insertion hole 42 of the ferrule 40. The tip is inserted to a position where the tip abuts against the step portion 25. As shown in FIG. 5, the front end of the ferrule 40 is brought into contact with the cam surface 27 by tightening the coupling member 30 by hand. Thereafter, since the front edge of the ferrule 40 moves so as to be wedged between the inner peripheral surface of the pipe insertion port 26, the fastening torque increases. 5 and 6 show the fastening start state of the coupling member 30 in which the tip of the ferrule 40 is in contact with the cam surface 27. The mark 4 described on the surface of the pipe 1 in these drawings is The outer position of the coupling member 30 in the fastening start state in which the front edge of the ferrule 40 abuts, that is, the pipe insertion position in the fastening start state is shown. The mark 4 is marked using the mark holes 13aa and 13ba which are long holes.

  In this way, when the coupling member 30 is manually tightened and the pipe 1 is temporarily held, the position where the front edge portion 47 of the ferrule 40 is formed comes into contact with the cam surface 27. Torque increases. Therefore, from this position, the coupling member 30 is fastened by a general fastening tool such as a spanner. When the predetermined rotational torque is reached, the rear end face of the pipe connecting portion 32 and the end face of the joint body 20 are formed so as to substantially coincide with each other, and the annular connecting portion 34 is cut to connect the coupling member 30. The fastening work is completed. FIG. 7 shows this state, and the mark 5 written on the surface of the pipe 1 in this drawing indicates the outer position of the coupling member 30 in the fastening completion state in which the fastening of the coupling member 30 is completed, that is, fastening. The pipe insertion position in the completed state is shown. The mark 5 is marked using the mark holes 13ab and 13bb which are long holes.

  In the bite type pipe joint 2 to which the coupling member 30 as described above is fastened, since the gripping portion 33 is cut when the pipe connection is completed, anyone cannot easily loosen the pipe connection portion. However, as shown in FIGS. 6 and 7, since a plurality of engagement holes 39 are formed on the side surface of the pipe connection portion 32, when it is necessary to reconnect the pipe 1, this engagement hole portion The pipe connection portion 32 can be loosened using a dedicated tool (not shown) adapted to 39.

According to the marking jig according to the present embodiment configured as described above, the following effects can be achieved.
(1) The marking jig 10 according to the present embodiment is composed of a flexible strip-like member 11 and is formed with a punching hole in the vicinity of one end so as to hook the end of the pipe 1 to be connected. A hanging portion 12 is provided. Further, mark holes 13a and 13b that can display the position of the insertion dimension of the pipe 1 set in the pipe joint are provided on the side at a position away from the hook 12 by a predetermined distance. Therefore, the marking jig 10 has a simplified flat plate structure, and the production die can be simplified by a punching die, which can contribute to the cost reduction of the marking jig 10.

  (2) The hooking portion 12 has a side notch so as to guide the end portion of the pipe 1 to be connected to the engaging hole portion 12a to be connected to the end portion of the pipe 1 to be connected to the engaging hole portion 12a. Therefore, the end portion of the pipe 1 is inserted into the engagement hole portion 12a from the inlet notch portion 12b and can be stably held at that position. Therefore, the position can be easily displayed using the mark holes 13a and 13b with a writing instrument or the like.

  (3) The entrance notch portion 12b is a notch portion having a constant width cut from the side edge in a perpendicular direction, and the engagement hole portion 12a has a constant width extending in parallel to the side edge from the tip of the entrance notch portion 12b. Therefore, the end of the pipe 1 can be stably held in the engagement hole 12a with a simple configuration.

  (4) The width dimension of the engagement hole 12a is larger than the cut width dimension of the inlet notch 12b and larger than the thickness of the pipe 1 to be connected. Therefore, by twisting the strip plate member 11 with the hook portion 12, the strip plate member 11 on which the marking portion 14 is formed can be disposed along the surface of the pipe 1, and the marking operation is facilitated. Become.

  (5) The mark holes 13a, 13b are long holes cut in a direction perpendicular to the side edges. Since it is comprised by 13ba and 13bb, the insertion position of piping can be displayed with the straight line extended in the circumferential direction with a writing instrument, and it can make the displayed position easy to see.

  (6) The marking portion 14 is configured so that the pipe 1 set in the plurality of pipe joints can be shared by a plurality of pipe joints having different insertion dimensions of the pipe set depending on the diameter of the pipe 1 to be connected. It is configured to include a plurality of mark holes 13a and 13b that can display the position of the insertion dimension. Therefore, the marking jig 10 can be shared with the pipe joint that connects the pipes 1 having a plurality of diameters, and the cost reduction effect can be further brought about.

  (7) Since the plurality of mark holes are formed in a distributed manner on both sides of the strip plate member or in the vicinity thereof, the mark holes 13a and 13b constituting the marking portion 14 are formed on both sides of the strip plate member 11. Dispersed in the side, strength deterioration of the strip plate member 11 can be prevented.

(8) Since the belt-like member 11 is formed of a flexible plastic plate, it is possible to provide a marking jig 10 that is inexpensive and has good durability, and is easy to handle.
(9) The marking jig 10 according to the present embodiment is a joint body provided with a pipe insertion port 26 and a cam surface 27 provided with a step part 25 as a restricting part for restricting the tip position of the pipe 1 to be connected. 20 and a ferrule 40 that includes a coupling member 30 that is screwed into the coupling body 20 and a ferrule 40 that is pressed by the coupling member 30 and has a leading edge in close contact with the cam surface 27. And the marking part 14 is the position of the outer side edge part of the bite type pipe joint 2 in the fastening start state of the coupling member 30 in which the front edge of the ferrule 40 contacts the cam surface 27, that is, the pipe insertion position in the fastening start state. Are formed so as to include mark holes 13aa and 13ba, which are long holes that can display. In general, in the bite type pipe joint 2, it is necessary to insert the pipe 1 to be connected into the pipe insertion port 26 through the pipe through hole 35 of the coupling member 30 or the pipe insertion hole 42 of the ferrule 40. It is difficult to determine by sound or touch whether the tip position of the pipe 1 to be in contact with the step portion 25 as the restriction portion of the pipe insertion port 26. However, proper insertion can be easily performed by using such a marking jig 10.

  (10) The marking jig 10 displays the mark insertion holes 13aa and 13ba, which are long holes for displaying the pipe insertion position in the fastening start state, and the pipe insertion position in the fastening completion state of the coupling member 30. The mark holes 13ab and 13bb are elongated holes. Therefore, it is possible to confirm whether or not the insertion dimension of the pipe 1 is properly formed both before and after the coupling member 30 is fastened, thereby further ensuring the insertion dimension. be able to.

  (13) The marking portion 14 has these two types of pipe insertion dimensions so that the pipe insertion dimensions set by the diameter of the pipe 1 to be connected can be shared by a plurality of pipe joints integrated into two types. The mark holes 13 a and 13 b for indicating the position are formed, and these two kinds of mark holes 13 a and 13 b are formed separately on the two sides of the band plate-like member 11. Therefore, the shared range of the marking jig can be expanded and the cost can be reduced. Further, the mark holes 13aa, 13ab. By providing 13ba and 13bb, it is possible to prevent confusion such as making a mistake in which of the pipe diameter mark holes 13a and 13b.

(Modification)
The above embodiment can be modified as follows.
As shown in FIG. 8A, the mark holes 13a and 13b may be long holes that are not cut, instead of the long holes that are cut in the direction perpendicular to the aforementioned side. Further, the mark holes 13a and 13b may be round holes as shown in FIG. When the mark holes 13a and 13b are long holes that are not cut in this way, the marks that indicate the insertion positions of the pipes are displayed in the mark holes 13aa, 13ab, 13ba, and 13bb. It is less likely to be displayed with a deviation. Moreover, since the side piece is not cut, the strength of the strip plate member 11 is improved.

  The mark holes 13a and 13b are independent of the notched long hole displaying the pipe insertion position in the fastening start state and the notched long hole displaying the pipe insertion position in the fastening completed state as in the above-described embodiment. However, instead of this, as shown in FIG. 8C, a mark hole which is a U-shaped long hole formed by connecting long holes that are not notched may be used. If comprised in this way, the piping insertion position in a fastening start state and the piping insertion position in a fastening completion state can be displayed by one entry operation.

  In addition, as shown in FIG. 8 (d), the mark holes 13a and 13b have one hole formed as a round hole, and the round hole and a long hole cut out on a side piece are connected to each other. It may be L-shaped.

  In the present embodiment, the pipe diameter applied to the mark holes 13a and 13b may be displayed in the vicinity of the two types of mark holes 13a and 13b. If comprised in this way, the mistake by the mistake of the usage method of the marking jig | tool 10 which makes mistakes for the mark holes 13a and 13b can be reduced.

  In the above embodiment, the bite type pipe joint 2 is described as an example, but the basic technical idea in the present invention may be applied to other pipe joints. Here, the basic technical idea of the present invention is composed of a flexible strip-like member 11, a hook 12 is formed in the vicinity of one end thereof, and a position away from the hook 12 by a predetermined distance. This refers to a configuration in which a marking portion 14 including mark holes 13a and 13b is provided.

  In the embodiment, the step portion 25 as the restriction portion for restricting the tip position of the pipe 1 provided at the pipe insertion port 26 has a step difference of the step portion 25 as shown in FIGS. Although it is formed smaller than the wall thickness, it may be the same size.

  The bite type pipe joint 2 according to the above embodiment is configured such that the independently formed ferrule 40 is temporarily held by the coupling member 30, but the ferrule 40 is formed independently and is independent. It is good also as what is assembled | attached as a member, and the integral separation type which is formed integrally with the coupling member 30, and is isolate | separated in the fastening process of the coupling member 30. FIG.

  The marking jig according to the present invention is applied to a pipe joint used in a refrigerant circuit, a water circuit, a gas circuit, etc. in a refrigeration apparatus, an air conditioner, a hot water apparatus such as a water heater, a water supply apparatus, and general production equipment. can do. Further, the marking jig according to the present invention can be applied to connection between pipes, a pipe joint part in a valve such as a closing valve, and a pipe joint part in other various devices. In addition, the pipes targeted by the marking jig to which the present invention is applied include metal pipes such as copper pipes and stainless steel pipes as well as resin pipes.

It is drawing of the marking jig | tool which concerns on embodiment of this invention, Comprising: (a) is a top view, (b) is a side view. It is drawing which shows the usage method of the marking jig | tool, Comprising: (a) is a state figure which hooked the hook part on the edge part of piping, (b) is an enlarged view of the edge part in (a). . It is drawing which shows the usage method of the marking jig | tool, Comprising: It is drawing which showed the state marked with a writing implement. It is drawing which shows the mark marked on piping by the marking jig. It is a perspective view of the bite type pipe joint using the pipe marked by the marking jig, and is a fastening start state diagram of the coupling member. It is a fragmentary sectional view of a bite type pipe joint using piping marked by the marking jig, and is a fastening start state figure of a connecting member. It is a fragmentary sectional view of the same bite type pipe joint, Comprising: It is a fastening completion state figure of a connecting member. It is a top view of the marking jig | tool which concerns on a modification, (a)-(d) is a modification figure from which each differs. It is a fragmentary sectional view of a bite type pipe joint concerning a conventional example, and (a) is a figure showing the conclusion start state of a general joint member, and (b) shows the conclusion completion state of a common joint member. It is a drawing. It is a fragmentary sectional view of the same bite type pipe joint, and (a) is a drawing which shows the fastening start state of a connecting member when the insertion dimension of piping to a pipe insertion port is insufficient, (b) These are drawings which show the fastening completion state of a coupling member in case the insertion dimension of piping to a pipe insertion port is insufficient. It is drawing in the use condition of the marking jig which concerns on a prior art example, Comprising: (a) is a top view, (b) is sectional drawing.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... (to be connected) piping, 2 ... (Biting type) pipe joint, 10 ... Marking jig | tool, 11 ... Strip plate-like member, 12 ... Hook part, 12a ... Engagement hole part, 12b ... Inlet notch part, 13a, 13b, 13aa, 13ab, 13ba, 13bb ... Mark hole, 14 ... Marking part, 20 ... Joint body, 25 ... Step part (as regulating part), 26 ... Pipe insertion port, 27 ... Cam face, 30: coupling member, 40: ferrule.

Claims (12)

A joint main body having a pipe insertion port and a cam surface provided with a restricting portion for restricting a tip position of the pipe to be connected, a coupling member screwed into the joint main body, and a leading edge pressed by the coupling member A marking jig for piping used in a bite type pipe joint provided with a ferrule that is in close contact with the cam surface,
It is made of a flexible strip-like member, and is provided with a hooking portion made of a punched hole so as to hook the end of the pipe to be connected in the vicinity of one end, and at a position away from this hooking portion by a predetermined distance. A marking part having a mark hole that can display the position of the insertion dimension of the pipe set in the joint is provided ,
Further, the marking portion includes a mark hole that allows the position of the outer end portion of the bite type pipe joint to be displayed in a fastening start state of the coupling member in which the front edge of the ferrule is in contact with the cam surface, and a coupling member A marking jig for pipes , comprising: a mark hole capable of displaying a position of an outer end portion of a bite type pipe joint in a fastening completion state .   The hook portion includes an engagement hole portion that engages with an end portion of a pipe to be connected, and an inlet notch portion in which a side is cut out so as to guide the end portion of the pipe to be connected to the engagement hole portion. The marking jig for piping according to claim 1, wherein   The entrance notch is a notch with a constant width cut in a direction perpendicular to the side, and the engagement hole is a hole with a constant width extending in parallel to the side from the tip of the entrance notch. The piping marking jig according to claim 2, wherein the marking jig is provided.   The pipe marking jig according to claim 3, wherein a width dimension of the engagement hole is larger than a width dimension of the inlet notch and larger than a wall thickness of the pipe to be connected.   The pipe marking jig according to any one of claims 1 to 4, wherein the mark hole is a long hole cut in a direction perpendicular to the side.   The piping marking jig according to any one of claims 1 to 4, wherein the mark hole is a hole not cut out on a side.   The marking part has a plurality of marks that can display the positions of the insertion dimensions of the pipes set in the plurality of pipe joints so that the pipes to be connected can be shared by a plurality of pipe joints having different insertion dimensions. The piping marking jig according to claim 1, further comprising a hole for use.   8. The piping marking jig according to claim 7, wherein the plurality of mark holes are formed in a distributed manner on both sides of the strip plate member or in the vicinity thereof.   The piping marking jig according to any one of claims 1 to 8, wherein the belt-like member is formed of a flexible plastic plate. The marking portion includes a mark hole that can display a position of the outer end portion of the bite type pipe joint in the fastening start state of the coupling member, and a position of the outer end portion of the bite type pipe joint in the fastening completion state of the coupling member. The piping marking jig according to any one of claims 1 to 9, wherein the marking hole that can be displayed is a continuous hole. The marking part is a mark for indicating the position of these two types of pipe insertion dimensions so that the pipe insertion dimensions set according to the diameter of the pipe to be connected can be shared by a plurality of pipe joints integrated into two types. has a use holes, the pipe according to any one of claim 1 to 10, the two types of mark hole is characterized in that it is formed separately on two sides of the strip-like member Marking jig. The piping marking jig according to any one of claims 1 to 11 , wherein the marking portion is displayed so that a piping size applied in the vicinity of the mark hole is understood.

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