JP2007107601A - Pipe connecting member and its cap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily connect a pair of pipes by fastener connection, and to surely maintain the connection state without breaking even when tensile force is applied to the pipe. <P>SOLUTION: The resin made pipe connecting member 1 connects the pair of pipes P1 and P2 having flanges f1 and f2 on the end thereof and fitted with each other so as to overlap the flanges f1 and f2, is provided with: an opening 2 having a width almost corresponding to an outside diameter of the pipe on its end; and a storing part 3 to store the pipe on a deep inner part, and is formed to be approximately in a U-shape. An inner peripheral surface 4 comprising: a cylindrical surface 41 in an almost semicircular shape having an inside diameter corresponding to the outside diameter of the pipe; and a pair of plane surfaces 42 continued to the cylindrical surface 41 respectively, is formed in the storing part 3. A guide groove 5 having a width and a depth corresponding to a thickness of the overlapped pair of the flanges and the difference between a radius of the flange and a radius of the pipe, is formed over the whole periphery of the inner peripheral surface 4 of the storing part 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pipe connecting member for connecting a pair of pipes and a cap thereof.

  Conventionally, a method called fastener connection is known as one of methods for connecting pipes. In this fastener connection, flanges are formed at the end portions, and a pair of pipes in a state of being fitted to each other so as to overlap the flanges are connected using an elastic connection fitting.

  Specifically, as shown in FIGS. 6 and 7, the elastic connection fitting 100 is formed in a substantially Ω shape when viewed from the front as a whole by bending a spring plate material, and has a substantially semicircular shape. A pair of main body portions 100a, a pair of guide portions 100b connected to each one end of the main body portion 100a, and a connecting portion 100c connected to the other end of the pair of main body portions 100a. Since the flanges f1 and f2 of the pipes P1 and P2 are engaged over the part 100a and a part of the connecting part 100c in the vicinity of the main body 100a, the engagement groove 100d having a width corresponding to the combined thickness of the flanges f1 and f2 is provided in the circumferential direction In addition, a notch 100e for inserting the pipes P1 and P2 in a direction orthogonal to the axial direction is formed between the opposing guide portions 100b and 100b.

  In addition, in order to avoid interference with the flanges f1 and f2, the connecting portion 100c is bent into a U-shape protruding outward in the radial direction, and each tip thereof is connected to each other end of the main body portion 100a. In addition, the guide portion 100b is formed in a divergent shape extending in a direction of separating from the main body portion 100a so as to guide the insertion of the pipes P1 and P2.

When connecting a pair of pipes P1 and P2 using the elastic connection fitting 100 configured in this way, one pipe P1 is fitted into the other pipe P2 and the flanges f1 and f2 are overlapped, and the state Then, the elastic connection fitting 100 may be fitted into the pipes P1 and P2 through the notch 100e. As a result, the elastic connecting fitting 100 elastically deforms and expands the opening width of the notch 100e to a width corresponding to the outer diameter of the pipes P1 and P2, and then returns to the original size so that these pipes The flanges f1 and f2 of P1 and P2 are fitted into the engaging groove 100d, and the pipes P1 and P2 can be connected while being prevented from coming out. (For example, refer to Patent Documents 1 and 2).
Japanese Patent No. 2897908 Utility Model Registration No. 3084382

  By the way, as the above-mentioned elastic connection fitting, it is common to use a stainless steel plate as a spring plate material. However, when a pair of pipes are connected using such an elastic connection fitting, there is a problem that if a tensile force acts on the pipes, the pipes are easily broken. In other words, if a tensile force acts on the pipe, it will act on the elastic connection fitting through the flange, but the spring plate material forming the elastic connection fitting is thin, so even if the pipe is a synthetic resin pipe, There was a problem of breaking with a tensile force less than the breaking strength.

  To solve this problem, it is conceivable to increase the thickness of the elastic connection bracket. However, increasing the thickness increases the strength, but a large force is required to elastically deform when fitted into the flange. Thus, the workability is lowered.

  In addition, as shown in FIG. 7, it has been proposed to increase the strength without increasing the plate thickness by dividing the engaging groove in the main body portion of the elastic connection fitting. Since the area where the elastic fitting and the flange come into contact decreases, the load is concentrated on the small area of the flange, and a large load acts on the flange of the pipe. In particular, when the flange is formed of a material having a relatively low strength such as a synthetic resin, the reduction of the contact area between the flange and the elastic connecting metal is very disadvantageous in terms of strength.

  Thus, in the conventional elastic connection fitting, if the thickness of the fitting is reduced, the workability is improved, but the strength is reduced. On the other hand, if the thickness is increased, the strength is improved, but the workability is lowered. Therefore, it was difficult to substantially improve the strength. Further, it is inevitable that the load acts on the flange in a concentrated manner.

  The present invention has been made in view of such problems, and a pair of pipes can be easily connected by fastener connection, and even if a tensile force acts on the pipes, it is securely connected without breaking. It is intended to provide a new pipe connecting member capable of maintaining the above.

  The pipe connection member of the present invention is a resin pipe connection member that connects a pair of pipes that are fitted to each other so that flanges are formed at the ends, and the flanges are overlapped. Has an opening with a width that roughly corresponds to the outer diameter of the pipe, and has an accommodating part that can accommodate the pipe at the inner back, and is formed in a substantially U-shape, and the accommodating part corresponds to the outer diameter of the pipe A substantially semicircular cylindrical surface having an inner diameter and an inner peripheral surface composed of a pair of planes continuous with the cylindrical surface, respectively, and the inner peripheral surface of the accommodating portion has a thickness of a pair of flanges and A guide groove having a width and a depth corresponding to the difference between the radius of the flange and the radius of the pipe is formed over the entire circumference.

  Although it does not specifically limit as a synthetic resin, For example, olefin resin, such as vinyl chloride, polyethylene, a polypropylene, can be mentioned. Moreover, engineering plastics such as POM, PES, and PPSU can also be used. In this case, durability and heat resistance are excellent, which is preferable.

  According to the present invention, if one pipe is fitted into the other pipe, the flanges are overlapped, and the pipe connection member is fitted into these pipes through the opening in that state, the guide groove of the pipe connection member A pair of flanges enter and cover the pipe, and the guide groove sandwiches the pair of flanges from both sides in the front-rear direction, so that the pipe can be connected while preventing it from coming out.

  As a result, since it is made of a synthetic resin, the thickness can be sufficiently increased without impairing the workability, and the strength can be ensured. In addition, since the structure covers the flange of the pipe, the load is evenly distributed, the strength is improved, the concentration of the load on the flange can be suppressed, and the cost can be suppressed.

  In the present invention, the degree of contact of the guide groove with the flange of the pipe is preferably 55% or more in order to prevent the pipe connection member from easily coming out of the flange.

  However, if the degree of contact of the guide groove with the flange increases, it must be elastically deformed by pressing with a large force when fitting the pipe connection member into the pipe. It is necessary to appropriately set the contact degree in consideration of the material and thickness of the connecting member.

  In the present invention, when a locking portion that is positioned in the vicinity of the side of the cylindrical surface and can be locked with the outer peripheral surface of the pipe is formed on the plane that forms the inner peripheral surface of the housing portion, the pipe from the pipe It is possible to reliably prevent the connecting member from coming out and to grasp that the pipe has been securely accommodated in the accommodating portion during construction by the piping getting over the locking portion.

  In the present invention, when a fitting portion is formed in the vicinity of the front end of the flat surface constituting the inner peripheral surface of the housing portion, a cap is attached to the opening of the pipe connection member using this fitting portion. When the opening is closed, the cap can be prevented from coming off.

  The cap of the pipe connection member of the present invention is a cap of the pipe connection member that closes the opening of the pipe connection member according to claim 4, and the cap has an opening having a width substantially corresponding to the outer diameter of the pipe at the tip. And a substantially C-shape having an accommodating portion capable of accommodating approximately half of the pipe in the inner back, and the accommodating portion is formed of a substantially semicircular cylindrical surface having an inner diameter corresponding to the outer diameter of the pipe. An inner peripheral surface is formed, and a guide groove having a width and a depth corresponding to the difference between the thickness of the pair of flanges overlapped and the radius of the flange and the radius of the pipe is formed on the inner peripheral surface of the housing portion. In addition, a flat surface that can be overlapped with a flat surface constituting the inner peripheral surface of the pipe connection member, and a guide protrusion that can be fitted into the guide groove are formed on the outer surface of each tip portion. The fitted part that can be fitted to the fitting part of the pipe connection member It is characterized in being.

  According to the present invention, when the pipe connecting member is fitted into the pipe through the opening, the pair of flanges enter the guide groove of the pipe connecting member to cover the pipe, and the guide groove sandwiches the pair of flanges from both sides in the front-rear direction. It will be in a state and it can prevent piping from connecting and can connect piping. Next, if the opening of the cap is opposed to the opening of the pipe connecting member and fitted into the pipe connecting member, the plane of the cap and the guide ridge are superposed along the plane of the pipe connecting member and the guide groove, and further the fitting By fitting the joint part into the fitting part of the pipe connecting member, the pipe can be accommodated in the accommodating part and the flange of the pipe can be accommodated in the guide groove.

  As a result, it is possible to increase the contact area with the flange of the pipe by the pipe connecting member and the cap, and to connect the pipe, and to further distribute the load. In addition, the opening of the pipe connecting member can be closed by a cap that prevents the pipe connection member from coming out, and the appearance and safety can be improved.

  In the present invention, when the cap according to claim 5 is fitted into the pipe so as to close the opening of the pipe connection member according to claim 4, and the fitting part and the fitted part are fitted, the pipe connection If the outer surface shape is formed so as to be bilaterally symmetric with the outer surface shape of the member, it is preferable because no protruding portion is generated.

  ADVANTAGE OF THE INVENTION According to this invention, while a pair of piping can be easily connected by fastener connection, even if tensile force acts on a pair of piping, a connection state can be maintained reliably, without destroying.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show an embodiment of the pipe connecting member 1 of the present invention.

  As described above, the pipe connecting member 1 has flanges f1 and f2 formed at the ends thereof, and connects a pair of pipes P1 and P2 fitted together so that the flanges f1 and f2 overlap. The front end has an opening 2 having a width substantially corresponding to the outer diameter of the pipes P1 and P2, and has an accommodating part 3 capable of accommodating the pipe at the inner back part, and is formed in a substantially U shape by a synthetic resin. .

  And the accommodating part 3 in the pipe connection member 1 is composed of a substantially semicircular cylindrical surface 41 having an inner diameter corresponding to the outer diameter of the pipes P1 and P2 and a pair of flat surfaces 42 and 42 respectively continuous with the cylindrical surface 41. An inner peripheral surface 4 is formed. Further, the inner peripheral surface 4 of the accommodating portion 3 in the pipe connecting member 1 has a width corresponding to the thickness of the pair of flanges f1 and f2, and a difference between the radii of the flanges f1 and f2 and the radii of the pipes P1 and P2. A guide groove 5 having a depth corresponding to is formed over the entire circumference. Further, each flat surface 42 constituting the inner peripheral surface 4 of the pipe connecting member 1 is provided with a locking portion 421 (see FIG. 3) which is located in the vicinity of the side intersecting the cylindrical surface 41 and protrudes inward. It is formed parallel to the axial direction of P1 and P2, and can be locked to the outer peripheral surfaces of the pipes P1 and P2 accommodated in the accommodating portion 3.

  Here, the circumferential length of the cylindrical surface 41 constituting the inner peripheral surface 4 of the accommodating portion 3 in the pipe connecting member 1 is set to 60% of the length of the outer peripheral surface of the pipes P1 and P2, and therefore The circumferential length of the arc portion of the guide groove 5 corresponding to the cylindrical surface 41 of the circumferential surface 4 is also 60% of the circumferential length of the flanges f1 and f1.

  In this case, the side where the cylindrical surface 41 and the plane 42 intersect is obtained at a position advanced by 5% from the tip of the semicircle in the circumferential direction, and the plane 42 is continuously extended from that position so as to be orthogonal to the diameter of the semicircle. If it does, the space | interval between a pair of opposing planes 42 and 42, ie, the space | interval of the opening 2, will be 98.8% of the outer diameter of piping P1, P2.

  The case where a pair of piping P1, P2 is connected using the piping connection member 1 comprised in this way is demonstrated.

  First, after fitting one pipe P1 into the other pipe P2 and overlapping the flanges f1 and f2, the opening 2 of the pipe connecting member 1 is exposed to the outside of the flanges f1 and f2, and its guide groove 5 may be fitted to the flanges f1 and f2 and fitted in the diameter direction perpendicular to the axial direction of the pipes P1 and P2. As a result, the pipe connecting member 1 is expanded by slightly elastically deforming the interval between the inner peripheral surfaces 4 in the housing part 3 to a width corresponding to the outer diameter of the pipes P1 and P2, and further the locking part 421. The pipes P1 and P2 can be accommodated in the accommodating portion 3 by getting over the outer peripheral surfaces of the pipes P1 and P2. In addition, the flanges f1 and f2 of the pipes P1 and P2 can be accommodated in the guide groove 5 formed in the inner peripheral surface 4.

  At this time, the cylindrical surface 41 contacts 60% of the outer peripheral surface of the pipes P1 and P2, and similarly, the guide groove 5 formed in the cylindrical surface 41 contacts 60% of the outer peripheral surface of the flanges f1 and f2. ing.

  As a result, since the pipes P1 and P2 are connected by covering the flanges f1 and f2 of the pipes P1 and P2 with the pipe connection member 1 made of synthetic resin, the strength problem and the flanges f1 and f2 and the pipe connection member 1 The problem of contact area can also be solved. That is, by manufacturing the pipe connecting member 1 with synthetic resin, the thickness can be sufficiently increased without increasing the weight, that is, without impairing the workability, and the strength can be ensured. Further, since the structure covers the flanges f1 and f2 of the pipes P1 and P2, the load is evenly distributed, the strength is improved, the concentration of the load on the flanges f1 and f2 can be suppressed, and the cost is also reduced. Can be suppressed.

  Moreover, piping P1, P2 gets over the latching | locking part 421, and while being able to accommodate piping P1, P2 in the accommodating part 3, it can grasp | ascertain completion of construction. Therefore, it is possible to prevent water leakage due to poor construction due to the construction being completed in the middle. Moreover, the latching | locking part 421 contacts the outer peripheral surface of piping P1, P2, becomes resistance, and can prevent that the piping connection member 1 slips out from piping P1, P2 by the vibration after use, etc.

  Thus, when a tensile test was performed on the pipes P1 and P2 connected by the pipe connecting member 1 at a head speed of 10 mm / min, the pipe P1 and P2 were broken at 6.5 kN.

  Incidentally, in the elastic connecting metal fitting 100 made of SUS shown in FIG. 6, the degree of contact with the flanges f1 and f2 is 66%. Then, when a tensile test was performed on the pipes P1 and P2 connected by such an elastic connecting metal 100 at a head speed of 10 mm / min, the pipe P1 and P2 were broken at 4.0 kN.

  Further, in the elastic connecting metal fitting 100 made of SUS shown in FIG. 7, the contact degree with the flanges f1 and f2 is 50%. Then, when a tensile test was performed on the pipes P1 and P2 connected by such an elastic connecting metal 100 at a head speed of 10 mm / min, the pipe P1 and P2 were broken at 6.0 kN.

  In the elastic connection fitting 100 shown in FIGS. 6 and 7, if the contact area between the flanges f1, f1 and the fitting 100 exceeds 55%, the fitting 100 is broken, and if it is 55% or less, the flanges f1, f2 are broken. Destroyed.

  By the way, in embodiment mentioned above, although the case where the piping connection member 1 connected the piping P1, P2 independently was illustrated, since the opening 2 of the piping connection member 1 will be in the open state in this case. From the viewpoint of safety and appearance, it is preferable to close the opening 2.

  For this reason, the cap 10 which closes the opening 2 of the piping connection member 1 is prepared.

  4 and 5, the cap 10 has an opening 11 having a width substantially corresponding to the outer diameter of the pipes P1 and P2 at the tip, and the pipes P1 and P2 at the inner back, as shown in FIG. 4 and FIG. The housing portion 12 that can accommodate approximately half is formed in a substantially C shape by the same synthetic resin as the pipe connecting member 1.

  And the inner peripheral surface 13 which consists of the substantially semicircular cylindrical surface 131 of the internal diameter corresponding to the outer diameter of piping P1, P2 is formed in the accommodating part 12 of the cap 10, and the inner peripheral surface of the accommodating part 12 is formed. A guide groove 14 having a width and a depth corresponding to the difference between the thickness of the paired flanges f1 and f2 and the radius of the flanges f1 and f2 and the radius of the pipes P1 and P2 is formed over the entire circumference. . A flat surface 15 is formed on the outer surface of the tip of the cap 10 over a set length with an interval corresponding to the interval between the flat surfaces 42 and 42 constituting the inner peripheral surface 4 of the pipe connecting member 1. On the flat surface 15, there are formed guide ridges 16 having a width and a height corresponding to the thickness of the pair of flanges f1, f2 and the difference between the radii of the flanges f1, f2 and the radii of the pipes P1, P2. . The flat surface 15 can overlap with the flat surface 42 constituting the inner peripheral surface 4 of the pipe connecting member 1, and the guide protrusion 16 is a guide formed on the flat surface 42 constituting the inner peripheral surface 4 of the pipe connecting member 1. Polymerization is possible in the groove 5. Further, the flat surface 15 formed on the outer surface of the tip of the cap 10 is provided with a fitting protrusion 15a (see FIG. 5) as a fitted portion that is located near the tip of the cap 10 and protrudes outward. It is formed in parallel with the axial direction of the pipes P1, P2. The fitted portion 15a is fitted with a fitting groove 42a (see FIG. 5) as a fitting portion formed in the vicinity of the front end portion of the flat surface 42 constituting the inner peripheral surface 4 of the pipe connecting member 1. Is set.

  As described above, the flat surface 15 of the cap 10 and the guide protrusion 16 are superposed on the flat surface 42 constituting the inner peripheral surface 4 of the pipe connecting member 1 and the guide groove 5 formed on the flat surface 42, and the pipe connecting member 1. When the fitting protrusion 15a of the cap 10 is fitted in the fitting groove 42a, the cylindrical surface 41 and the cylindrical surface 131 corresponding to the outer diameters of the pipes P1 and P2 are centered by the pipe connecting member 1 and the cap 10. A flat hexagonal column in which fitting grooves 5 and 14 having widths and depths corresponding to the outer diameters and thicknesses of the flanges f1 and f2 of the pipes P1 and P2 are formed on the inner peripheral surface thereof. Can be assembled (see FIG. 5D).

  When the pair of pipes P1 and P2 are connected using the pipe connection member 1 and the cap 10 thus configured, as described above, the pipe connection members are connected to the flanges f1 and f2 of the pipes P1 and P2 that are fitted to each other. After fitting 1, the cap 10 may be fitted to the flanges f1 and f2 of the pipes P1 and P2 so as to close the opening of the pipe connection member 1.

  Specifically, the opening 2 of the pipe connecting member 1 is made to face the outside of the flanges f1 and f2, and the end of the guide groove 5 is aligned with the flanges f1 and f2 so as to be orthogonal to the axial direction of the pipes P1 and P2. It is only necessary to fit in the diameter direction. As a result, the pipe connecting member 1 is expanded by slightly elastically deforming the interval between the inner peripheral surfaces 4 in the housing part 3 to a width corresponding to the outer diameter of the pipes P1 and P2, and further the locking part 421. The pipes P1 and P2 can be accommodated in the accommodating portion 3 by getting over the outer peripheral surfaces of the pipes P1 and P2. In addition, the flanges f1 and f2 of the pipes P1 and P2 can be accommodated in the guide groove 5 formed in the inner peripheral surface 4.

  Next, the opening 11 of the cap 10 may be opposed to the opening 2 of the pipe connecting member 1 and fitted into the diameter direction perpendicular to the axial direction of the pipes P1 and P2. Thereby, the flat surface 15 and the guide protrusion 16 of the cap 10 are superposed along the flat surface 42 and the guide groove 5 constituting the circumferential surface 4 of the pipe connection member 1, and the fitting protrusion 15 a is further connected to the pipe connection member. By fitting in one fitting groove 42a, the pipes P1 and P2 can be accommodated in the accommodating portion 3, and the flanges f1 and f2 of the pipes P1 and P2 are formed in the inner peripheral surface 13 as guide grooves 14. Can be accommodated.

  In this case, the circumferential length of the inner peripheral surface 13 (cylindrical surface 131) of the accommodating portion 12 in the cap 10 is set to the circumferential length of the cylindrical surface 41 constituting the inner peripheral surface 4 of the accommodating portion 3 in the pipe connecting member 1. The added length is set to 90% of the length of the outer peripheral surface of the pipes P1 and P2.

  Similarly, when a tensile test was performed on the pipes P1 and P2 connected by the pipe connecting member 1 and the cap 10 at a head speed of 10 mm / min, the pipe was broken at 8 kN.

  As described above, according to the present invention, pipe connection work can be performed without impairing workability, and the connection state can be maintained over a long period of time, so that the reliability of the pipe connection portion can be improved. .

It is a perspective view which shows one Embodiment of the piping connection member of this invention. FIG. 2 is a half cross-sectional view showing a state in which a pair of pipes are connected by the pipe connection member of FIG. 1. It is explanatory drawing which shows the process of connecting a pair of piping with the piping connection member of FIG. It is a perspective view which shows one Embodiment of the cap of this invention with a piping connection member. It is explanatory drawing which shows the process of connecting a pair of piping with the cap and piping connection member of FIG. It is explanatory drawing which shows the process of connecting a pair of piping with the conventional elastic connection metal fitting. It is explanatory drawing which shows the process of connecting a pair of piping with the other conventional elastic connection metal fittings.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe connection member 2 Opening 3 Accommodating part 4 Inner peripheral surface 41 Cylindrical surface 42 Plane 421 Locking part 42a Fitting groove (fitting part)
5 Guide groove 10 Cap 11 Opening 12 Housing part 13 Inner peripheral surface 131 Cylindrical surface 14 Guide groove 15 Flat surface 15a Fitting protrusion (fitting part)
16 Guide protrusion

Claims (6)

  It is a resin pipe connection member that connects a pair of pipes that are fitted to each other so that flanges are formed at the ends, and the pipe connection member almost corresponds to the outer diameter of the pipe at the tip. And has an accommodating part capable of accommodating the pipe in the inner back part, and is formed in a substantially U shape, and the accommodating part has a substantially semicircular shape with an inner diameter corresponding to the outer diameter of the pipe. A cylindrical surface and an inner peripheral surface made of a pair of planes continuous with the cylindrical surface are formed, and the inner peripheral surface of the accommodating portion includes a thickness of a pair of flanges, a radius of the flange, and a radius of the pipe. A pipe connecting member, characterized in that a guide groove having a width and a depth corresponding to the difference is formed over the entire circumference.   The pipe connection member according to claim 1, wherein the degree of contact of the guide groove with the flange of the pipe is 55% or more.   The flat surface constituting the inner peripheral surface of the housing portion is formed with a locking portion that is positioned in the vicinity of the side with the cylindrical surface and that can be locked with the outer peripheral surface of the pipe. The piping connection member described.   The pipe connecting member according to any one of claims 1 to 3, wherein a fitting portion is formed in the vicinity of a front end of a plane constituting the inner peripheral surface of the housing portion.   5. A pipe connection member cap for closing an opening of a pipe connection member according to claim 4, wherein the cap has an opening having a width substantially corresponding to the outer diameter of the pipe at the tip, and an abbreviation of the pipe at the inner back. It is formed in a substantially C shape having a housing portion that can accommodate half, and the housing portion is formed with an inner peripheral surface formed of a substantially semicircular cylindrical surface having an inner diameter corresponding to the outer diameter of the pipe. A guide groove having a width and a depth corresponding to the thickness of the paired flanges and the difference between the flange radius and the pipe radius is formed over the entire circumference on the inner peripheral surface of each part. The outer surface of the pipe connection member is formed with a plane that can be overlapped with the plane that constitutes the inner peripheral surface of the pipe connection member, and a guide protrusion that can be fitted into the guide groove, and is fitted into the fitting portion of the pipe connection member on the plane. Piping connection portion characterized in that a mating fitted portion is formed Cap.   When the cap according to claim 5 is fitted into the pipe so as to close the opening of the pipe connection member according to claim 4, and the fitting portion and the fitted portion are fitted, the outer shape of the pipe connection member The cap of the pipe connection member according to claim 5, wherein an outer surface shape is formed so as to be symmetrical to the right and left.

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