JP2008240803A - Gas feeding connection unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a valve element from being stopped on the midway when the valve element is returned from an opened position to a closed position in a plug type gas outlet. <P>SOLUTION: A valve storage hole 1c and a valve seat hole 1d are provided at the inside of a body 1. A seal member 5 is provided on an inner peripheral surface of the valve seat hole 1d so as to be positioned/fixed. A valve part 2b slidably always fitted to the valve seat hole 1d and always pressing/contacted with the seal member 5 is provided on the valve element 2. A outflow passage 6 is shut off relative to the valve storage hole 1c by the seal member 5 when the valve element 2 is positioned at the closed position but it connecting the valve storage hole 1c with the valve seat hole 1d in a downstream side than the valve part 2b when the valve element 2 is positioned at the opened position is provided on the valve part 2b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gas supply connector such as a plug-type gas outlet.

  In general, a plug-type gas outlet includes a main body having a valve housing portion formed therein, a valve body provided in the valve housing portion so as to be movable between a closed position and an open position, and the valve body from the open position. And biasing means such as a coil spring that biases toward the closed position. A plug portion is formed on the outer surface of one end of the main body. Inside the main body, a valve seat hole is formed in which one end opens to the valve accommodating portion and the other end opens to the distal end surface of the plug portion. The valve body is provided with a valve portion. The valve portion closes the valve seat hole and closes the gas outlet when the valve body moves to the closed position, and opens the valve seat hole and opens the gas outlet when the valve body moves to the open position. When the gas outlet is opened, gas flows out from the valve seat hole.

  A socket is connected to the gas outlet configured as described above. When connecting the socket, the socket is externally inserted into the plug portion. Then, the push rod provided in the socket hits the tip surface of the valve portion, and moves the valve body from the closed position to the open position against the urging force of the urging means. As a result, gas flows from the valve seat hole into the socket and is further supplied to the gas appliance. When the socket is removed from the plug portion, the valve body is returned from the open position to the closed position by the biasing means. Therefore, the gas outlet is automatically closed.

  By the way, in the conventional gas outlet, as described in the following Patent Document 1, a valve seat having a tapered shape is provided in the valve seat hole, and the valve portion is separated from and seated on the valve seat. One that opens and closes the seat hole, and one that is provided with a seal member such as an O-ring made of an elastic material in the valve portion, and that opens and closes the valve seat hole by inserting and removing this seal member into the valve seat hole There is. In the case of the former gas outlet, if the valve element moves even slightly from the closed position toward the open position, the gas outlet immediately switches from the closed state to the open state. For this reason, when a rod-shaped body is inserted from the opening of the valve seat hole and the valve body is pushed to the open position side by this rod-shaped body, there is a problem that gas leaks immediately. On the other hand, in the latter gas outlet, the valve body moves slightly to the open position side due to an unexpected accident by lengthening the movement distance of the valve body necessary to escape the seal member from the inner peripheral surface of the valve seat hole. Even if it is made, there exists an advantage that it can prevent that a sealing member remove | deviates from a valve seat hole, and can prevent a gas leak accident by it.

JP-A-6-58443

  The conventional gas outlet provided with a seal member on the outer peripheral surface of the valve portion has the above-mentioned advantages, but when the valve body moves from the open position toward the closed position, the valve body is moved between the open position and the closed position. There was a risk of stopping in the middle. That is, the seal member is in press contact with the inner peripheral surface of the valve seat hole by its own elasticity. Therefore, in a state where the seal member has escaped from the valve seat hole, the outer diameter of the seal member is larger than the inner diameter of the valve seat hole. For this reason, when the valve body moves from the open position to the closed position, the seal member abuts against the intersection of the inner peripheral surface of the valve seat hole and the inner surface of the valve housing part. In this case, when the seal member hits the intersecting portion, the diameter of the seal member is reduced by the urging force of the urging means, and the seal member should be inserted into the valve seat hole. However, the force required to reduce the diameter of the seal member is greater than the force to slide the reduced diameter seal member against the inner peripheral surface of the valve seat hole. For this reason, the seal member may be caught at the intersection. In such a case, the valve body stops between the open position and the closed position, and cannot be returned to the closed position. It was.

In order to solve the above problem, the present invention provides a main body having a plug portion provided on the outer surface and a valve housing portion to which gas is supplied provided therein, and the valve housing portion along the axis of the plug portion. A valve body movably provided between a closed position and an open position, and biasing means for biasing the valve body from the open position toward the closed position. A valve seat hole having an upstream end opening in the valve housing portion and a downstream end opening in the distal end surface of the plug portion is provided in the valve body. A valve portion inserted so as to be movable in the axial direction is provided, and an annular made of an elastic material for sealing between the inner peripheral surface of the valve seat hole and the outer peripheral surface of the valve portion is provided. In the gas supply connector provided with the seal member, the seal member is provided on the inner peripheral surface of the valve seat hole so as not to move. The length of the valve portion is set so that the outer peripheral surface of the valve portion is always in contact with the seal member, and when the valve body is located in the closed position, the valve housing When the valve body is blocked by the seal member and located in the open position, an outflow passage is provided for communicating the valve housing portion with a location downstream of the valve portion of the valve seat hole. It is characterized by being.
In this case, the outflow path has a horizontal hole extending inward from the outer peripheral surface of the valve portion and a vertical hole extending from the horizontal hole to an end surface on the downstream side of the valve portion, and the outer periphery of the valve portion. When the valve body is located at the closed position, the opening of the horizontal hole in the surface is located downstream of the seal member, so that the valve housing portion is blocked by the seal member, and the valve It is desirable that the body is disposed so as to face the valve accommodating portion when the body is in the open position.
The outflow passage has an outflow groove formed on the outer peripheral surface of the valve portion and extending from a midway portion in the axial direction of the valve portion to an end surface on the downstream side. The outflow groove has the valve body in the closed position. When the valve body is located at the open position, the upstream end portion is blocked by the seal member. It is desirable that they are arranged so as to face the valve accommodating portion.
On the inner surface of the valve housing portion, a female screw portion whose axis is aligned with the axis of the valve seat hole is formed, and on the outer peripheral surface of the valve body, a male screw portion that can be screwed to the female screw portion is formed. The male threaded portion is positioned against the downstream end of the female threaded portion to position the closed position of the valve body, and is abutted against the upstream end of the female threaded portion to move the valve body from the closed position to the open position. It is desirable to prevent movement in the direction of the direction.

  According to the present invention having the above-described characteristic configuration, the outer peripheral surface of the valve portion is always in contact with the seal member, and the frictional resistance acting between the seal member and the valve portion is always substantially constant. Therefore, the valve body is not stopped between the closed position and the open position. Moreover, by increasing the length of the valve portion, even if the valve body is slightly moved from the closed position to the open position due to an accident, it is possible to prevent a situation in which a gas leak occurs. .

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 and 2 show a first embodiment of the present invention. In this embodiment, the present invention is applied to a plug-type gas outlet (gas supply connector) A. A socket S is detachably connected to the gas outlet A. The present invention is also applicable to gas supply connectors other than the gas outlet A.

  First, the gas outlet A will be described. The gas outlet A has a main body 1 having a cylindrical shape. A tapered male screw portion 1a is formed on the outer peripheral surface of the base end portion (the left end portion in FIGS. 1 and 2) of the main body 1. A primary side gas pipe and a gas appliance are connected to the taper male screw portion 1a. A straight male screw portion may be formed instead of the taper male screw portion 1a. Further, instead of the taper male screw portion 1a or the straight male screw portion, a taper female screw portion or a straight female screw portion may be formed on the inner peripheral surface of the base end portion of the main body 1. A plug portion 1 b is formed on the outer peripheral surface of the distal end portion of the main body 1. The plug portion 1b has the same shape and dimensions as the plug portion of the JIS standard that defines the quick joint.

  Inside the main body 1, there are formed a valve accommodation hole (valve accommodation portion) 1c and a valve seat hole 1d in which the respective axes coincide with the axis of the plug 1b. One end portion (upstream end portion) of the valve accommodation hole 1 c is open to the base end surface of the main body 1. Therefore, when the gas pipe is screwed and fixed to the tapered male screw portion 1a, the gas flows from the gas pipe into the proximal end portion of the valve housing hole 1c. The valve seat hole 1d extends from the downstream end of the valve housing hole 1c to the distal end surface of the main body 1 (the distal end surface of the plug portion 1b). The valve seat hole 1d has a smaller diameter than the valve accommodation hole 1c. As a result, an annular step surface 1e that faces the upstream side of the valve accommodation hole 1c is formed between the valve accommodation hole 1c and the valve seat hole 1d.

  The valve body 2 is accommodated in the valve accommodating hole 1c so as to be movable in the axial direction of the valve accommodating hole 1c. The outer diameter of the valve body 2 is smaller than the inner diameter of the valve housing hole 1c. Therefore, gas can flow between the inner peripheral surface of the valve housing hole 1 c and the outer peripheral surface of the valve body 2. Two long and short coil springs (biasing means) 4 are provided between the valve body 2 and the spring receiver 3 fixed to the base end of the valve housing hole 1c. The valve body 2 is urged toward the downstream side of the valve accommodating hole 1c by the coil spring 4. Only one coil spring 4 may be provided. In addition, a through hole 3 a for flowing gas is formed at the center of the spring receiver 3.

  An annular contact surface 2a facing the downstream side of the valve accommodating hole 1c is formed at the intermediate portion of the outer peripheral surface in the axial direction of the valve body 2. When the contact surface 2a hits the stepped surface 1e, the valve body 2 cannot move further downstream. The position of the valve body 2 at this time is a closed position. As shown in FIG. 2, when the socket S is connected to the plug portion 1b, the valve body 2 is moved from the closed position to the open position shown in FIG. 2 against the urging force of the coil spring 4 by the push rod 11a of the socket S. Moved. Of course, when the socket S is removed from the plug portion 1b, the valve body 2 is moved from the open position to the closed position by the coil spring 4.

  A valve portion 2b is integrally provided at the distal end portion (the right end portion in FIGS. 1 and 2) of the valve body 2 following the contact surface 2a. The valve portion 2b is slidably inserted into the valve seat hole 1d. The length of the valve portion 2b is such that the valve portion 2 is inserted into the valve seat hole 1d not only when the valve body 2 is in the closed position but also when the valve body 2 is moved to the open position. Is set to such a length that can be maintained. That is, the valve portion 2b is slidably inserted into the valve seat hole 1d at all times when the valve body 2 is located between the closed position and the open position. In addition, when the valve body 2 is located at the closed position, the distal end surface of the valve portion 2b is spaced upstream from the distal end surface of the plug portion 1b, but is substantially the same as the distal end surface of the plug portion 1b. It may be located on a plane.

  A mounting recess 1f is formed in an annular shape at the upstream end of the inner peripheral surface of the valve seat hole 1d. A sealing member 5 such as an O-ring made of an elastic material is mounted on the mounting recess 1f. The seal member 5 is in annular contact with the bottom surface and both side surfaces of the mounting recess 1f by its own elasticity. Therefore, the seal member 5 cannot move in the axial direction with respect to the valve seat hole 1d. In the state in which the valve portion 2b is not inserted into the valve seat hole 1d, the inner peripheral portion of the seal member 5 protrudes radially inward from the inner peripheral surface of the valve seat hole 1d. Therefore, when the valve portion 2b is inserted into the valve seat hole 1d, the seal member 5 is annularly pressed and brought into contact with the outer peripheral surface of the valve portion 2b while being compressed by the amount protruding from the valve seat hole 1d. As a result, the space between the inner peripheral surface of the valve seat hole 1d and the outer peripheral surface of the valve portion 2b is hermetically sealed by the seal member 5.

  An outflow passage 6 is formed in the valve portion 2b. The outflow passage 6 is blocked by the seal member 5 with respect to the valve housing hole 1c when the valve body 2 is located at the closed position. However, when the valve body 2 is located at the open position, the valve housing hole 1c and the valve seat are disposed. It communicates with a location downstream of the valve portion 2b of the hole 1d.

  That is, a lateral hole 61 that penetrates the valve portion 2b in the radial direction is formed in the middle portion of the valve portion 2b in the longitudinal direction. The lateral hole 61 may be a blind hole that is open at one end and closed at the other end without using the valve portion 2b as a through hole. A plurality of the lateral holes 61 may be formed. As shown in FIG. 1, when the valve body 2 is located at the closed position, the lateral holes 61 are located at both ends of the lateral hole 61 on the downstream side of the seal member 5. When the valve body 2 is located at the open position, it is arranged so that at least a part of both end openings are exposed in the valve housing hole 1c. Therefore, when the valve body 2 is located at the closed position, the lateral hole 61 is blocked by the seal member 5 with respect to the valve accommodation hole 1c, but when the valve body 2 is located at the open position, the valve accommodation hole 1c. Communicate with. As a result, the gas in the valve housing hole 1 c flows into the lateral hole 61.

  A vertical hole 62 extending along the axis is formed in the valve portion 2b. Two vertical holes 62 are formed in this embodiment, but only one or three or more may be formed. One end (the left end in FIGS. 1 and 2) of the vertical hole 62 is open to the inner peripheral surface of the horizontal hole 61. The other end of the vertical hole 62 opens at the tip surface of the valve portion 2b. Therefore, when the valve body 2 is located in the open position, the seal member 5 closes the space between the outer peripheral surface of the valve portion 2b and the inner peripheral surface of the valve seat hole 1d. The gas flows through the horizontal hole 61 and the vertical hole 62 and flows into the valve seat hole 1 d on the downstream side of the seal member 5.

  Since the socket S is a well-known socket, the socket S has a main body 11 having a bottomed cylindrical shape. Inside the main body 11, a push rod 11a extending on the axis from the bottom toward the opening is provided. The push rod 11a moves the valve body 2 from the closed position to the open position when the main body 11 is extrapolated to the plug portion 1b to a predetermined connection position. As a result, the gas in the valve housing hole 1c of the outlet A flows into the main body 11 from the valve seat hole 1d. The gas that has flowed into the main body 11 is supplied to a gas device (not shown) via a joint pipe 12 that is rotatably provided at the bottom of the main body 1.

  When the main body 11 is extrapolated to the plug portion 1b to a predetermined connection position, the cylindrical body 13 is retracted to the predetermined position shown in FIG. 2 against the urging force of the coil spring 14 by the distal end portion of the plug portion 1b (FIG. 1). To the right). Then, the sphere 15 can move toward the inside in the radial direction of the main body 11, and the operation cylinder 16 can move forward (move leftward in FIG. 1). The operation cylinder 16 is advanced to a predetermined position by the coil spring 17. At this time, the operating cylinder 16 moves the sphere 14 inward as it advances, and engages the engaging recess 1g formed in an annular shape on the outer peripheral surface of the plug portion 1b. Thereby, the main body 11 is connected to the plug portion 1b so as not to be inserted and removed. That is, the socket S is connected to the outlet A so that it cannot be inserted and removed.

  When the operation cylinder 16 is retracted to the original position shown in FIG. 1 in a state where the main body 11 is connected to the plug portion 1b, the spherical body 15 becomes movable toward the radially outer side of the main body 11, and the main body 11 is plugged. It becomes removable from the part 1b. When the main body 11 is removed from the plug portion 1 b, the cylindrical body 13 is returned to the original position by the coil spring 14, and the spherical body 15 is prevented from moving inward by the cylindrical body 13. Thereafter, when the operation cylinder 16 is moved freely, the operation cylinder 16 is prevented from moving forward by the sphere 15. As a result, the entire socket S returns to the original state. On the other hand, in the outlet A, when the socket S is removed from the plug portion 1b, the valve body 2 that has been moved to the open position by the push rod 11 is moved to the closed position by the coil spring 4, and is closed.

  In the outlet A configured as described above, since the outer peripheral surface of the valve portion 2b is always in contact with the seal member 5, the magnitude of the frictional resistance acting between the outer peripheral surface of the valve portion 2b and the seal member 5 is It is almost constant regardless of the position of the body 2. Therefore, the situation where the valve body 2 stops between the closed position and the open position can be prevented. In addition, since the valve portion 2b is in sliding contact with the seal member 5, the lateral hole 61 (outflow passage 6) is communicated with the valve accommodation hole 1c from the state where it is shielded by the seal member 5 with respect to the valve accommodation hole 1c. The distance traveled by the valve body 2 can be increased. Therefore, even if the valve body 2 is slightly moved from the closed position toward the open position due to an accident, it is possible to prevent a situation in which gas leakage occurs.

  Next, another embodiment of the present invention will be described. In addition, regarding the following embodiment, only a different structure from the said embodiment is demonstrated, and the same code | symbol is attached | subjected about the structure similar to the said embodiment, and the description is abbreviate | omitted.

  3 and 4 show a second embodiment of the present invention. In the gas outlet B of this embodiment, an outflow path 6A is employed instead of the outflow path 6 of the above embodiment. The outflow path 6 </ b> A has one or a plurality of outflow grooves 63. The outflow groove 63 is formed along the longitudinal direction on the outer peripheral surface of the valve portion 2b. One end portion (the left end portion in FIG. 3) of the outflow groove 63 is disposed at an intermediate portion in the longitudinal direction of the valve portion 2b. More specifically, as shown in FIG. 3, one end portion of the outflow groove 63 is located downstream of the seal member 5 and seals against the valve accommodation hole 1c when the valve body 2 is located at the closed position. It is interrupted by the member 5. On the other hand, as shown in FIG. 4, when the valve body 2 is located in the open position, one end of the outflow groove 63 is disposed so as to face the valve housing hole 1c. Therefore, when the valve body 2 is in the closed position, the gas in the valve housing hole 1c does not flow into the outflow groove 63, but when the valve body 2 is in the open position, the gas in the valve housing hole 1c Gas flows into the outflow groove 63. The other end portion of the outflow groove 63 is open to the distal end surface of the valve portion 2b. Therefore, when the valve body 2 is located at the open position, the gas in the valve accommodation hole 1c flows through the outflow groove 63 (outflow path 6A) and flows out to the end portion on the downstream side of the valve portion 2b of the valve seat hole 1d.

  5 to 7 show a third embodiment of the present invention. In the gas outlet C of this embodiment, an internal thread portion 1h is formed on the inner peripheral surface of the valve accommodation hole 1c. The female thread portion 1h has a ridge diameter (inner diameter of the female thread portion 1h) smaller than the inner diameter of the valve accommodating hole 1c so that the thread protrudes inward from the inner peripheral surface of the valve accommodating hole 1c. . On the other hand, a male screw portion 2c is formed on the outer peripheral surface of the valve body 2, more specifically, on the outer peripheral surface upstream of the valve portion 2b. The male screw portion 2 c has a crest diameter (an outer diameter of the male screw portion 2 c) larger than that of the outer peripheral surface of the valve body 2 so that the screw thread protrudes radially outward from the outer peripheral surface of the valve body 2. ing. Moreover, the diameter of the thread of the male thread 2c is larger than the diameter of the thread of the female thread 1h so that the side of the thread of the male thread 2c can abut the side of the thread of the female thread 1h.

  As shown in FIG. 5, the female screw portion 1h and the male screw portion 2c are arranged such that the valve body 2 is positioned at the closed position when the upstream end portion of the male screw portion 2c abuts on the downstream end portion of the female screw portion 1h. Is arranged. Therefore, in this embodiment, when the valve body 2 is located between the closed position and the open position, the contact surface 2a does not hit the step surface 1e, and the contact surface 2a contacts the step surface 1e. In contrast, it is spaced upstream.

  The female screw part 1h and the male screw part 2c can be screwed together. Therefore, when the valve body 2 is rotated in a predetermined direction in a state where the male screw portion 2c is in contact with the female screw portion 1h, the male screw portion 2c is screwed into the female screw portion 1h. Then, when the valve body 2 is rotated in one direction by a predetermined number of revolutions or more, as shown in FIG. 7, the male screw portion 2c passes through the female screw portion 1h. An engagement groove 2d that engages a blade edge of a driver (not shown) for rotating the valve body 2 is formed on the distal end surface of the valve portion 2b.

  If the valve body 2 can be freely moved in a state where the male screw portion 2c passes the female screw portion 1h to the downstream side, the valve body 2 is moved to the downstream side by the coil spring 4, and the contact surface 2a. Will hit the stepped surface 1e. This prevents the valve body 2 from moving further downstream. In a state where the male screw portion 2c has passed the female screw portion 1h downstream, when the valve body 2 is moved upstream against the biasing force of the coil spring 4, the downstream end of the male screw portion 2c becomes the female screw portion 1h. The valve body 2 is prevented from moving to the downstream side. The position of the valve body 2 at this time is on the downstream side of the closed position, and the valve body 2 cannot move to the open position side unless the male screw portion 2c passes the female screw portion 1h upstream. Therefore, by making the male screw portion 2c pass through the female screw portion 1h to the downstream side, the valve body 2 is prevented from being moved to the open position due to an accident, thereby reliably preventing gas leakage. Can do. In addition, when the valve body 2 is located in the open position, between the inner peripheral surface of the female screw portion 1h and the outer peripheral surface of the valve body 2, and the outer peripheral surface of the male screw portion 2c and the inner peripheral surface of the valve housing hole 1c A gap for allowing a sufficient amount of gas to flow is formed in between.

It is sectional drawing which shows 1st Embodiment of this invention and the socket connected to it. It is sectional drawing which shows the embodiment and the socket connected to it. It is sectional drawing which shows 2nd Embodiment of this invention in the state which located the valve body in the closed position. It is sectional drawing which shows the same embodiment in the state which located the valve body in the open position. It is sectional drawing which shows 3rd Embodiment of this invention in the state which located the valve body in the closed position. It is sectional drawing which shows the same embodiment in the state which located the valve body in the open position. It is sectional drawing which shows the same embodiment in the state which the external thread part passed the internal thread part downstream.

Explanation of symbols

A Plug type gas outlet (gas supply connector)
C Plug type gas outlet (gas supply connector)
D Plug type gas outlet (gas supply connector)
1 Body 1b Plug 1c Valve housing hole (Valve housing)
1d Valve seat hole 1h Female thread part 2 Valve body 2b Valve part 2c Male thread part 4 Coil spring (biasing means)
5 Seal member 6 Outflow path 6A Outflow path 61 Horizontal hole 62 Vertical hole 63 Outflow groove

Claims (4)

A plug part is provided on the outer surface, and a valve housing part to which gas is supplied is provided inside, and the valve housing part is movable between a closed position and an open position along the axis of the plug part. Provided with a valve body and a biasing means for biasing the valve body from the open position toward the closed position, and an upstream end is opened to the valve housing portion inside the main body. And a valve seat hole whose downstream end opens to the distal end surface of the plug portion is provided, and the valve body is provided with a valve portion that is inserted into the valve seat hole so as to be movable in the axial direction thereof. In the gas supply connector provided with an annular seal member made of an elastic material for sealing between the inner peripheral surface of the valve seat hole and the outer peripheral surface of the valve portion,
The seal member is provided immovably on the inner peripheral surface of the valve seat hole;
The length of the valve portion is set so that the outer peripheral surface of the valve portion is always in contact with the seal member,
When the valve body is in the closed position, the valve portion is blocked by the seal member with respect to the valve housing portion, and when the valve body is in the open position, the valve housing A gas supply connector comprising an outflow passage that communicates a portion of the valve seat hole with a location downstream of the valve portion. The outflow passage has a horizontal hole extending inward from the outer peripheral surface of the valve portion, and a vertical hole extending from the horizontal hole to an end surface on the downstream side of the valve portion, and the outer surface of the valve portion When the valve body is located at the closed position, the opening of the horizontal hole is located downstream of the seal member, so that the valve housing part is blocked by the seal member, and the valve body is The gas supply connector according to claim 1, wherein the gas supply connector is disposed so as to face the valve accommodating portion when the valve is in the open position. The outflow passage has an outflow groove formed on the outer peripheral surface of the valve portion and extending from a midway portion in the axial direction of the valve portion to an end surface on the downstream side. The outflow groove has the valve body in the closed position. When the valve body is located at the open position, the upstream end portion is blocked by the seal member. The gas supply connector according to claim 1, wherein the gas supply connector is disposed so as to face the valve accommodating portion. On the inner surface of the valve housing portion, a female screw portion whose axis is aligned with the axis of the valve seat hole is formed, and on the outer peripheral surface of the valve body, a male screw portion that can be screwed to the female screw portion is formed. The male threaded portion is positioned against the downstream end of the female threaded portion to position the closed position of the valve body, and is abutted against the upstream end of the female threaded portion to move the valve body from the closed position to the open position. The gas supply connector according to any one of claims 1 to 3, wherein the gas supply connector is prevented from moving in the direction of heading.

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