JP4122006B2 - Vibration absorbing flexible joint - Google Patents

Description

  The present invention is a joint for coupling a pipe by inserting a cap nut into a main body socket portion by inserting a cap nut into a main body socket portion and rotating the cap nut to rotate the piping when pipe construction such as water pipe is performed. The present invention relates to a vibration-absorbing flexible joint that absorbs vibration applied to a joint joint portion by passing a vehicle, construction, or the like and imparts flexibility to a joint pipe.

  Conventionally, as described in Patent Documents 1 and 2, for example, as described in Patent Documents 1 and 2, a vibration-absorbing flexible joint is integrated by baking a thick rubber packing on a flat washer or by arranging a thick rubber packing behind a washer. It has been performed to seal and fix the outer periphery of a joint pipe inserted by inserting a cap nut using a seal packing provided.

This seal packing supports the joint pipe in the socket by the inner circumference being pressed against the outer circumference of the joint pipe by the tapered inner wall of the socket part by the screwing of the cap nut screwed into the main body socket part, and vibrates due to its elasticity. It is comprised so that flexibility may be given to a joint pipe.
No. 3000711 registered utility model gazette JP 2002-213661 A

  However, the conventional vibration-absorbing flexible joint is configured by arranging a washer or washer in the form of a flat plate in parallel with a thick rubber packing or by baking and fixing it, so that a seal packing is formed. There was a problem that the end face of the joint pipe collided with the corner of the joint pipe insertion port of the washer and the joint pipe could not be smoothly inserted into the joint body.

  In addition, when a thick rubber packing is baked and integrated on the washer to eliminate the washer displacement, the exhaustion of the rubber packing covers the entire seal packing, including the washer, and the rubber against the washer. It took a lot of time and labor to bake packing.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and a seal packing is formed by fitting an elastic annular body into which a cylindrical body is inserted into a guide frame having a flange formed on the end face of the cylindrical body. I tried to do it.

  With this configuration, the elastic annular body and the guide frame constituting the packing can be integrated without performing a baking operation, and the elastic annular body and the guide frame are integrated, so that the washer is displaced when the joint pipe is inserted. Nor.

  Also, chamfering is performed on the inner periphery of the guide frame joint pipe insertion port of the seal packing so that the corner of the insertion port is rounded, and the end surface of the joint pipe through which the cap nut is inserted is the corner of the joint pipe insertion port of the washer Even if it butt | matches, the end surface of a joint pipe is guided by the insertion port by the shape which performed the chamfering process, and the insertion to the joint main body of a joint pipe can be performed smoothly.

  In addition, an outer peripheral groove is engraved on the outer periphery of the elastic annular body of the seal packing, and an inner peripheral groove is engraved on the inner periphery. The outer ring groove prevents water from entering the outer peripheral groove, and the inner groove improves the sealing performance of the elastic annular body by improving the sealing performance of the elastic annular body. Thus, the vibration absorbing power and flexibility can be improved.

  Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a joint member body, one end is configured to accommodate a seal packing 3 and a socket portion 11 having a male screw 12 engraved on the outer periphery thereof and screwed to a cap nut, and the other end is configured as an appropriate pipe joining mechanism such as a metal pipe joint. .

  The cap nut 2 has a bag portion 21 in which the joint pipe A is inserted and the ball guide 4 is housed on the front end side, and a threaded portion 22 in which a rear end side is engraved with a female screw 23 screwed with the male screw 12 of the socket portion. The seal packing 3 is accommodated inside thereof.

  The seal packing 3 is configured by fitting an elastic annular body 34 into which a cylindrical body is inserted into a guide frame 31 in which a flange 33 is formed on an end surface of the cylindrical body 32. An inner circumferential groove 36 is formed on the groove 35 and the inner circumference. Even when vibration is applied to the joint pipe by engraving the groove, particularly the outer circumferential groove 35, the seal packing 3 can easily follow the pipe and vibration resistance is improved.

  Further, by engraving the inner circumferential groove 36, even if water enters the seal portion, the intrusion of water can be temporarily blocked at the groove portion, and vibration resistance and durability are improved. The inner circumferential groove 36 is not necessarily provided when the joint diameter is small.

  Further, the inner periphery 37 of the guide frame joint pipe insertion port of the seal packing is formed in an R shape, and even if the end surface of the joint pipe collides with the corner of the joint pipe insertion port of the guide frame 31, the end face of the joint pipe is formed by the chamfered shape. Is guided by the insertion slot.

  The socket part 11 has a threaded part with a cap nut 2 having an external thread 12 engraved on the outside, and the diameter of the inner part of the enlarged part becomes a tapered part 13, and the upper surface of the tail end of the elastic annular body 34 abuts. It is like that.

  With this configuration, when the cap nut 2 is screwed and the seal packing 3 is press-fit, the tail end of the elastic annular body 34 is reduced in diameter by the taper portion 13 and at the same time the upper surface is compressed so that the inner wall of the elastic annular body is joined. The insertion gap is sealed in close contact with the outer surface of the tube A.

  When the joint pipe A is inserted into the bag portion 21 of the cap nut 2 in the joint body configured as described above, the joint pipe A is guided by the ball guide 4 and inserted into the socket portion 11 through the seal packing 3. After confirming the insertion depth of the pipe, the cap nut is tightened with a tool to join the pipes.

  The cap nut 2 is screwed together with the socket male screw 12 so that the ball guide 4 pushes the seal packing guide frame 31 and the seal packing 3 is press-fitted. Tighten and fix.

  Since the present invention is configured as described above, the joint pipe A can be smoothly inserted into the joint main body, and the vibration followability of the seal packing and the sealing performance with respect to the joint pipe can be dramatically improved.

The vibration absorption flexible joint by the Example of this invention is shown, The main part side view which made the upper half the cross section which shows an internal structure, and the lower half is an external view Similarly, the side view of the seal packing with the upper half taken as the cross section showing the internal structure and the lower half as the external view Similarly, the overall side view showing a state where the jointed pipe is vibrated

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint member main body 11 Socket part 12 Socket part male screw 13 Socket part taper part 2 Cap nut 21 Cap part of cap nut 22 Cap part of cap nut 23 Cap screw of cap nut 3 Seal packing 31 Seal packing guide frame 32 Seal Cylindrical body of seal 33 Flange of seal packing 34 Elastic annular body of seal packing 35 Outer circumferential groove of elastic annular body 36 Inner circumferential groove of elastic annular body 37 Guide frame joint pipe insertion port inner circumference of seal packing 4 Ball guide A Joint pipe

Claims (3)

  Abutting on the end of the ball guide built in the cap nut, press-fitting into the main body socket that is screwed with the cap nut as the cap nut is screwed, and the joint pipe through which the cap nut is inserted by the tapered inner wall of the socket portion A vibration-absorbing flexible joint comprising: a seal packing that is condensed and pressed on the outer periphery; and a guide frame having a flange formed on the end surface of the cylindrical body, and an elastic annular body that is inserted into the cylindrical body.   The vibration absorbing flexible joint according to claim 1, wherein the inner periphery of the guide frame joint pipe insertion port of the seal packing is formed by chamfering. 3. The vibration-absorbing flexible joint according to claim 1, wherein an outer peripheral groove is formed on the outer periphery of the elastic annular body of the seal packing, and an inner peripheral groove is formed on the inner periphery, or only the outer peripheral groove is formed on the outer periphery.