TWI374987B - Lock ring for pipe joint, and pipe joint - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock ring and a pipe joint for a pipe joint, and more particularly to a pipe joint lock ring and pipe joint capable of preventing a pipe body inserted into a pipe joint from falling off. . [Prior Art] In the prior art, a pipe joint which can connect a pipe body to an insertion hole of a joint body or loosen the pipe body by one-touch is generally used. In such a pipe joint, a locking ring is disposed inside the insertion hole and a claw ring is formed on the inner edge side of the locking ring. Then, the outer periphery of the resin tube inserted into the insertion hole is engaged with the claw of the lock ring to prevent the tube from coming loose from the insertion hole (refer to, for example, Patent Document 1). However, the pipe joint described in Patent Document 1 may cause the claw of the lock ring to be engaged to the pipe body to be excessively engaged. Further, Patent Document 2 is provided with a restricting portion for restricting the engagement of the both sides of the claw of the lock ring. However, the restricting portion is formed by cutting the end portion of the claw portion in the circumferential direction, so that when the tubular body is subjected to a pulling force, the restricting portion may still excessively engage the tube. body. Patent Document 1: Japanese Laid-Open Patent Publication No. 2004-308793 (Patent Document 2) Japanese Laid-Open Patent Publication No. 2008-111531. SUMMARY OF THE INVENTION In view of the above problems, the present invention presupposes (four) claws ^ x = sen Providing more than one type of lock ring for the pipe joint and the bite of the body exceeds - the degree of the fixed ring is the hair of the hair (4) 1 type 11 pipe joint is prevented by the lock, the body is peeled off; the second part of the head is used for the % The annular portion is disposed outside the tubular body; 1 plural = claw-fastening portion '1 from the inner side of the annular portion in the radial direction and the parent is fitted to the outer peripheral edge of the tubular body to prevent the tubular body from falling off; The restriction 卩 is formed at a position adjacent to the claw-fastening portion, and abuts against the outer peripheral surface of the rim at an angle toward the outer side in the radial direction of the tubular body to limit the claw-fastening portion Bind to the tube degree. In the lock ring for the pipe joint of the first aspect, when the pipe body is inserted into the pipe joint portion due to the internal pressure, the self-pipe joint is locked, and a plurality of claws are extended at the annular portion of the pipe joint. Engages to the outer peripheral edge of the official 2, and holds the tubular body by the claw-fastening portion to prevent the j-tube from falling off. The pipe joint is provided with a restricting portion at a position where the locking ring is attached to the adjacent claw portion. The restricting portion abuts against the outer peripheral surface of the tubular body at an angle closer to the outer side in the radial direction of the tubular body than the claw-fastening portion to restrict the claw portion from being engaged with the tubular body. Therefore, it is possible to prevent the bite of the claws from being more than a certain degree to the body to prevent the claws from being engaged.

Too much degree causes the claw portion to pass through the tube body and the like. The second aspect of the invention is the locking ring for a pipe joint of the first aspect of the invention, and wherein the restricting portion is formed on both sides of the claw portion in the circumferential direction. In the second aspect, since the restricting portion is formed on both sides in the circumferential direction of the claw portion, when the plurality of claw portions are engaged to the outer peripheral edge of the tubular body, the restricting portions on both sides of the claw portion Will abut the outer edge of the pipe

surface. Therefore, the degree of engagement of the claw portion with respect to the tubular body is stabilized, so that the degree of engagement can be more surely controlled. According to a third aspect of the present invention, the tube of the second aspect is connected to the lock ring, and wherein the restricting portion is formed on the deep side of the annular portion toward the insertion direction of the tube. Further, the fourth aspect of the present invention is the lock ring for a pipe joint of the second aspect, and wherein the restricting portion is formed on the deep side of the annular portion toward the insertion direction of the pipe body. In the third and fourth modes, the tube can be made by the restriction ring (4) "== the deep side of the insertion direction of the tube":

The pipe joint which does not admit the fifth aspect has the following: a joint body formed with an insertion hole for inserting the pipe body. The pipe joint is a lock ring having an annular ring/outside of the pipe body; a plurality of claws a buckle portion extending from the ring portion and the side of the ring portion, and engaging the outer peripheral edge of the pipe body with a radius r falling off; and a restricting portion formed adjacent to the claw button portion to prevent 1 from the claw portion Further facing the outer side of the pipe body diameter direction, the position of the town is only 6 the outer peripheral edge of the pipe body, the degree of benefit; the sleeve that is engaged with the claw buckle portion to the pipe body is sleeved on the outer side of the joint body And the joint is held by the locking ring with the locking ring. The shape of the heart prevents the claw portion from falling off from the tube body. The invention of the present invention is an insertion hole inserted into the joint body, and the spleen is formed into a ring portion of the tube body by the locking ring. The & head is held in the joint body by a sleeve that is sleeved on the outside of the joint body. When the pipe hole is used, the pipe joint == part abuts against the taper surface of the sleeve because of the internal pressure, so that the claw joint of the pipe joint is slid to the pipe body, and the claw pin can be prevented. The part is self-shedding. At this time, the restricting portion formed at the position adjacent to the claw pin of the lock ring for the pipe joint abuts against the outer peripheral edge of the pipe body, thereby limiting the degree of engagement of the claw portion with respect to the pipe body. Therefore, it is possible to prevent the engagement of the claw portion with respect to the tubular body more than a certain degree to prevent the problem that the claw fastening portion penetrates the tubular body when the claw fastening portion is excessively engaged. The sixth aspect of the invention is the pipe joint of the fifth aspect, and wherein the pipe system is made of resin or rubber. In the invention of the sixth aspect, the tube system is made of resin or rubber, so that the claw-fastening portion of the lock ring for the pipe joint is more likely to be engaged with the outer peripheral edge of the pipe body. The seventh aspect of the present invention is the pipe joint of the fifth aspect, and wherein the inner edge of the sleeve of the 1374987 sleeve is provided with a release ring, which can be inserted between the claw portion and the pipe body to release the claw The buckle portion is engaged with the tube body. Further, the eighth aspect of the present invention is the pipe joint of the sixth aspect, and wherein the inner edge side of the sleeve is provided with a release ring, which can be inserted between the claw portion and the pipe body to release the The claw portion is engaged with the tube body. In the seventh aspect and the eighth aspect, the release ring provided in the sleeve is inserted between the claw portion and the tube body to release the bite portion to the tube body.

And the tube can be pulled out from the insertion hole. Therefore, the pipe body can be loosened from the pipe joint by a wide operation. The three locking joints and the pipe joints of the pipe joint of the present invention can be used for more than a certain degree of occlusion of the pipe body to prevent the occurrence of problems such as the claw body. Béfang [Embodiment] The following describes the embodiment of the present invention with reference to the drawings. Fig. 1 is an exploded view of a pipe joint 10 provided with a pipe joint according to an embodiment of the present invention. Further, Fig. 2 is a half cross-sectional view of the tube body = = before the head 10 of the lock ring for a pipe joint of the present invention. The official joint 10 is provided with a tubular intermediate portion 14 having a tubular body portion 12 at an outer side of =12. From the body part = as shown in the garden 2, in the middle part 14 and the sleeve 18 two = 8 1374987

The intervening system is an insertion hole 2 into which the tube body 40 can be inserted. Hole = 4. Keep in the insertion of the eight = font, the slightly; the opening of the font: the i side of the i::6 lock (the opposite side of the insertion side of the tube 4〇)

Intersection "Before = Solid =: Part _ is a description of the inner side of the middle part and slightly V-shaped. ... 14Α °About the locking ring 3G to be followed by the detailed V-shaped if H inner wall system is formed to be able to abut the locking ring 3 〇 slightly moving (four) solution U 纟 side insertion has - can be along the f-joint 10 axis direction = 30 \Receive the insertion hole and add

The structure of the insertion hole 2G is formed into a ^^/ shape and its inner wall ==^==22—connected to the sleeve ^ 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 Thin and along the lock portion 12 faces the tapered shape of the insertion hole π. The body='in each of the outer edge grooves i2A is intended to have a rubber 2::〇彖:i, the body P 2 is located at k, the outer edge of the outer edge groove 12A is deeper into the side of the hole 9 and the deepest portion has an expanded outer diameter And the wall i3 formed. The front end of the tubular body 40 abuts against the wall surface 13', so that the wall surface 13 serves as a retaining portion of the tubular body 40. Further, a female thread connecting the other lines is formed on the side of the main body portion 12 opposite to the insertion hole 2'. Moreover, one of the body portions 12 opposite to the insertion hole 2 相 is connected to the tube body (F1 Φ to is - -> the cake system forms a flange for connecting the eight body: the body (not shown) The body portion 12 of the sleeve may be made of bronze; the middle portion 14 may be made of resin; the locking ring 3 may be made of materials other than the components of the body. The tube body is made of a resin. In addition, the other soft components of the tube are locked. The 3G claw button portion 36 can bite the single member to show the locking ring 30 used in the pipe joint 10 shown in FIG. Ring 3 (Π A-type locking ring 3 〇 perspective view; Figure 3 B-locking fixation view ^ W 3C county turn ring 3G half-section view. The tie 2: 3 〇 has a ring-shaped annular portion 31. The annular portion 31 is separated from the outer edge by a specific interval and a specific portion pL is cut from the inner edge side in the radial direction, and the cut portion 32 is formed at a position different from the circumferential direction in the circumferential direction. The right side of the side is in the shape of the right side. The cut portion 34 formed by the fifteenth portion (the embodiment of the present invention) is not formed with the cut portions 32 and 34. 33 of 31 in two adjacent cuts The convex portion and the weir formed between the divided portions 32, that is, the radially inward position 13.74987 corresponding to the cut-away portion 34 is formed with a claw-fastening portion 36. As shown in Fig. 4A, the claw is viewed from the circumferential direction. The buckle portion 36 is curved and extended in the V-shaped extending direction of the annular portion 31 in the V-shaped outer side direction. The front end portion of the claw fastening portion 36 is formed in a shape that is sharp and easily engaged with the tubular body 40. A restricting portion 38 that is adjacent to the claw portion 36 is formed on both sides in the circumferential direction of the portion 36. As shown in Fig. 4B, the restricting portion 38 is bent toward the inner side of the V-shape along the V-shaped extending direction of the annular portion 31. The front end portion 38B of the restricting portion 38 is formed into a flat shape that is cut at a substantially right angle. Then, when the claw portion 36 is engaged with the tubular body 40, the V-shaped outer side surface 38A of the restricting portion 38 abuts against the tubular body. The outer peripheral surface of 40 is used to limit the degree of engagement of the claw portion 36 with the tubular body 40. The cross section of the locking ring 30 is slightly V-shaped, and the inner edge side and the outer edge side of the annular portion 31 are A total of 16 cutouts 32, 34 are provided, so that it can be extruded as the V-shaped inner space (V-shaped extensions on both sides) The parts are elastically deformed as they are close to each other. Therefore, as the tube body 40 is inserted into the insertion hole 20, the lock ring 30 is elastically deformed to expand the circular diameter concentrically. Next, the function of the pipe joint 10 will be described. When the pipe body 40 is inserted into the insertion hole 20 of the pipe joint 10, as shown in Fig. 5, the circular diameter of the lock ring 30 is expanded due to the front end of the pipe body 40. Next, while the pipe body 40 is inserted toward the deep side, The outer peripheral surface of the tubular body 40 is in frictional contact with the claw-fastening portion 36 of the locking ring 30 until the inner peripheral edge of the tubular body 40 contacts the Ο-shaped rings 24, 24. If the tubular body 40 continues to be inserted, The front end of the tubular body 40 reaches the wall surface 13 11 1374987 of the main body portion 12, 〇π, circular action 兮~ not in the women's state, when the tubular body 40 is subjected to internal pressure, it is taken out from the joint body 16 Therefore, the body 40 and the locking ring 30 will be slightly displaced toward the insertion hole 20 (4). As shown in FIG. 6, the outer edge side of the ring 30 of the locking ring 30 will abut the cone of the sleeve 18 from the i8A. . Therefore, as shown in FIG. 7, the claw-fastening portion 36 of the locking ring 3 is snapped to the tubular body 4, and the bell buckle portion 36 of the locking ring 3 is oriented toward the joint two- 16 is inclined to the side, so that it can be easily engaged to the tubular body, and the claw-fastening portion 36 is directed in the opposite direction to the direction in which the tubular body 4G is pulled out, so that the tubular body 40 is not easily peeled off. On the other hand, when the claw-fastening portion 36 of the lock ring 3 is engaged with the outer peripheral surface of the tubular body 40, the v-shaped outer side surface 38A of the restricting portion % formed on both sides of the claw-fastening portion 36 abuts against the tube. The outer periphery of the body 4〇 can limit the claw buckle.卩36 bite more than a certain degree. That is, the degree of engagement of the claw portion 36 with the tubular body 40 can be controlled by the restriction portion % to prevent the degree of engagement of the claw portion 36 from being excessive. Further, in the plural (eight in the present embodiment), the claw portions 36 are provided on both sides with a restricting portion 38 which can be used to limit the degree of engagement of the respective claw portions 36 so that the gripping portion 36 grips the tubular body 40. More stable. Therefore, the preventable tubular body 40 is detached from the insertion hole 20 (released). On the other hand, in the mounted state shown in Fig. 6, in order to remove the tubular body 4 〇 fc, a special tool can be inserted from the side of the inlet portion 20A of the insertion hole 20 to push the release ring 22 toward the deep side. Thereby, as shown in FIG. 8 1374987, the front end portion 22B of the release ring 22 on the deep side pushes the claw fastening portion 36 of the lock ring 30, so that the circular diameter of the lock ring 30 is expanded. At this time, the front end portion 22B of the release ring 22 pushes and expands the claw button portion 36 of the lock ring 30 while being inserted between the claw button portion 36 and the tube body 40, so that the claw button portion 36 is pulled out from the tube body 40. . In this state, the tubular body 40 can be pulled out from the insertion hole 20 (to make it loose). In the pipe joint 10 of the present embodiment, when the claw fastening portion 36 of the lock ring 30 is engaged to the outer peripheral surface of the pipe body 40, the V-shaped outer side surface 38A of the restricting portion 38 on both sides of the claw button portion 36 is Since the outer peripheral edge of the tubular body 40 is in contact with each other, the engagement of the claw-and-buckle portion 36 can be restricted to more than a certain extent. Therefore, it is possible to prevent the claw portion 36 from being excessively engaged with the tubular body 40 or even penetrating the tubular body 40. Further, in the above-described embodiment, the distal end shape of the restricting portion 38 formed by the lock ring 30 is formed into a flat shape which is cut at a substantially right angle, but the present invention is not limited to this shape. For example, as shown in Fig. 9, the front end portion 38B of the restricting portion 38 may have a tapered shape of a V-shaped inner front end formed by expanding a circular diameter in a direction away from the tubular body 40 (outside in the radial direction). Further, in the above embodiment, the example in which the claw portion 36 is formed in the central portion of the convex portion 33 has been described, but the claw portion 36 is not limited to the above position. For example, as shown in Fig. 10, the claw portion 36 may be moved to one side in the circumferential direction of the convex portion 33 to form the claw portion 36. At this time, the restricting portion 38 can be formed on the other side of the convex portion 33 where the claw portion 36 is not formed. Further, at this time, the restricting portion may be formed in a shape as shown in FIG. Further, in the above-described embodiment, the number of the claw portions 36 of the lock ring 30 is eight, but the present invention is not limited to the above, and may be other numbers. Further, the size and shape of the claw portion 36 and the restricting portion % are not limited thereto, and other forms may be formed. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded view of a pipe joint according to an embodiment of the present invention. Fig. 2 is a half cross-sectional view showing a state in which a pipe body is separated in a pipe joint according to an embodiment of the present invention. m(4)^ A perspective view of the locking ring used in the pipe joint shown. A top view of the locking ring used for the pipe joint shown. Figure 3C is a half cross-sectional view of the locking ring. Figure 4A is an α·α line of the locking ring shown in Figure 3B. Figure 4 is a cross-sectional view of the locking ring of Figure 3B. Fig. 5 is a half cross-sectional view showing the state of the pipe joint of the present embodiment (4). Figure 6 is a half cross-sectional view showing the dry state of the pipe joint of the embodiment of the present invention. & body in combination Figure 7 is a partial enlarged view of the claw buckle portion of the locking ring shown in Figure 6. σ in the state of the pipe body Fig. 8 is a half cross-sectional view showing a state in which the pipe joint of the embodiment of the present invention is removed and the locking ring is engaged. Fig. 9 is a plan view showing a modification of the claw fastening portion of the locking ring of the present invention and the limit 137.4987.

[Main component symbol description] 10 Pipe joint 12 Main body portion 12A Outer edge groove 12B Female thread 12C Flange portion 13 Wall surface 14 Intermediate portion 14A End portion 16 Joint body 18 Sleeve 18A Cone surface 18B Short diameter portion 20 Insert hole 20A Entrance portion 22 release ring 22A protrusion portion 22B such as end portion 24 Ο ring 30 lock ring 30A opening portion 31 annular portion 32 cutout portion 33 convex portion 34 cutout portion 36 claw portion 38 restriction portion 38A opening portion 38B front end portion 40 Body 15

Claims (1)

1374987 a retaining ring; and a sleeve sleeved on an outer side of the joint body, and having a ring portion for retaining the pipe joint with the lock ring, and abutting the annular portion of the lock ring for the pipe joint The cone surface for preventing the claw portion from coming off the tube body is prevented. 6. The pipe joint of claim 5, wherein the pipe system is made of resin or rubber. 7. The pipe joint of claim 5, wherein the inner edge of the sleeve is provided with a release ring, which can be inserted into the claw portion of the pipe joint locking ring and the pipe body To release the engagement of the claw portion with the tube body. 8. The pipe joint of claim 6, wherein the inner edge side of the sleeve is provided with a release ring, which can be inserted into the claw portion of the pipe joint locking ring and the pipe body To release the engagement of the claw portion with the tube body. 17