JP5502364B2 - Movement prevention means - Google Patents

Description

  According to the present invention, the first claw and the second claw are locked to the outer peripheral surface of the insertion portion by the pressing force that is directed to the insertion tube side received from the inclined portion when the locking portion is pressed by the pressing portion. The present invention relates to a movement preventing means for preventing the insertion tube from being detached from the receiving tube.

  As a conventional movement preventing means, for example, a tube (receiving port) having a tube (insertion tube) having an insertion port (insertion portion) at an end portion and a receiving port (receiving portion) into which the insertion port is inserted And a push ring that surrounds the insertion port inserted into the receiving port over the entire circumference. This push wheel has a recess (recess) formed radially inward and a pair of claws (first claw, second claw) spaced in the tube axis direction, and is stored in the recess. Wedge member (locking portion), and a bolt (pressing portion) that presses the wedge member radially inward at the shaft portion, and the wedge member is locked to the insertion opening by pressing the bolt The claw prevents the insertion opening from being removed. In such a movement preventing means, the wedge member has an inclined surface that forms an angle θ with respect to the tube axis direction, and the tube axis of the bolt presses the inclined surface so as to be perpendicular to the inclined surface, The pushing force from the bolt to the wedge member is increased by the movement of the insertion port from the receiving port, and the locking of the claw to the insertion port is deepened to further prevent the insertion port from being removed from the receiving port. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 9-196266 (page 4, FIG. 5)

  However, in Patent Document 1, the wedge member (locking portion) is in the recess (concave portion) by a bolt (pressing portion) in contact with the inner surface of the recess (receiving portion) side. Because it is pressed and fixed inward in the radial direction, when a force is applied to the tube (insertion tube) having the insertion port (insertion portion) toward the tube (receiving tube) side having the reception port In addition, it becomes difficult to bite the claw (first claw, second claw) of the wedge member into the insertion port, and over-insertion toward the tube having the receiving port of the tube having the insertion port occurs. However, there is a problem in that both the pipes may be damaged by the collision of the insertion port in the receiving port.

  The present invention has been made paying attention to such problems, and not only prevents the insertion tube from being detached from the receiving tube, but also prevents the insertion tube from being excessively inserted into the receiving tube. It is an object to provide a movement preventing means capable of

In order to solve the above problem, the movement preventing means of the present invention comprises:
A first claw that is formed along the circumferential direction of the insertion portion of the insertion tube and that is engaged with the outer peripheral surface of the insertion portion, and is spaced from the first claw to the insertion tube end side in the tube axis direction A locking portion having a second claw that is disposed and locked with the outer peripheral surface of the insertion portion, and an outer peripheral surface of the insertion portion that is formed in a receiving portion of a receiving tube into which the insertion portion is inserted. A recess that opens toward the housing and stores the locking portion therein, and a pressing portion that presses the locking portion toward the outer peripheral surface of the insertion portion in the recess,
At least one of the abutting portions of the pressing portion and the locking portion is formed in an inclined portion that inclines in the diameter increasing direction toward the insertion tube end in the tube axis direction,
The locking portion is pressed by the pressing portion via the inclined portion to lock the first claw and the second claw on the outer peripheral surface of the insertion portion, and the insertion tube A movement preventing means for preventing separation from the receiving pipe,
A facing surface facing the insertion direction of the insertion tube is formed in the recess, and the facing surface is formed in a substantially vertical surface with respect to the outer peripheral surface of the insertion portion ,
The locking portion includes a bulging portion that bulges toward the facing surface, and is disposed by being pressed by the pressing portion in the recess, and the locking portion rotates around the first claw. By doing so, the abutting portion between the pressing portion and the locking portion is in contact, and the locking portion is formed and arranged so as to rotate around the bulging portion in contact with the facing surface. It is characterized by that.
According to this feature, the locking portion has a force for pulling the first claw and the second claw toward the tube-insertion tube end side by moving the tube-insertion tube toward the tube-insertion tube end portion. Since a pressing force is applied to the outer peripheral surface of the insertion portion from the contact portion of the pressing portion via the inclined portion, at least the first claw is deeply locked by the outer peripheral surface of the insertion portion, and the insertion is performed. Over-insertion of the mouth tube into the receiving tube is prevented.

The movement preventing means of the present invention includes
At least one of the end portions on the contact portion side of the pressing portion and the locking portion is formed in a curved surface.
According to this feature, when the locking portion rotates around the contact portion between the pressing portion and the locking portion, the end portion of the pressing portion and the locking portion comes into contact with each other so that the pressing portion and the locking portion are locked. Since the stress is not concentrated between the pressing portion and the locking portion, the pressing portion and the locking portion are not easily damaged, and the locking portion can be smoothly rotated.

FIG. 3 is a plan view showing the installation state of the fluid pipe in the first embodiment. It is AA half sectional drawing of the fluid pipe | tube in FIG. It is BB sectional drawing of the fluid pipe | tube in FIG. It is a figure which shows the removal prevention from the receiving tube of an insertion tube by a movement prevention means. (A) is sectional drawing which shows the state which a latching | locking part rotates centering on a bulging part, (b) is sectional drawing which shows the state which a 1st nail | claw deeply latches to an insertion part. . 6 is a cross-sectional view of a fluid pipe in Example 2. FIG. (A) is a cross-sectional view showing a state in which the locking portion contacts the inner wall in the recess, (b) is a cross-sectional view showing a state in which the locking portion rotates around the first claw, (C) is sectional drawing which shows the state which a 1st nail | claw deeply latches to an insertion part. (A) is sectional drawing which shows the movement prevention means in Example 3, (b) is sectional drawing which shows the state which a 1st nail | claw deeply latches to an insertion part.

  The form for implementing the movement prevention means based on this invention is demonstrated below based on an Example.

  The movement preventing means according to the first embodiment will be described with reference to FIGS. Reference numeral 1 in FIG. 1 denotes a fluid pipe to which the present invention is applied. The fluid pipe 1 includes an insertion port 2 at one end in the longitudinal direction and a receiving port 3 having a diameter larger than that of the insertion port 2 at the other end. Is made substantially coaxial, and a plurality of fluid pipes 1 can be continuously connected in the longitudinal direction by inserting the insertion part 2 into the receiving part 3 of another fluid pipe 1.

  And these fluid pipes 1 are buried in the ground in the state where they were connected continuously, for example, and function as a waterworks pipe for distributing water. The direction in which the clean water flows through the fluid pipe 1 is from the receiving port 3 toward the insertion port 2 as shown by the white arrow in FIG.

  Hereinafter, in this embodiment, the fluid pipe 1 on the side where the insertion part 2 is inserted into the reception part 3 of the fluid pipe 1 on the other side is referred to as the insertion pipe 4, and the reception part 3 into which the insertion part 2 is inserted. The fluid pipe 1 on the side having the above will be described as a receiving pipe 5.

  As shown in FIG. 3, a sealing material 6 is attached to the inner peripheral surface of the receiving port 3 in a watertight manner along the circumferential direction of the receiving tube 5. This seal material 6 is adapted to abut on the outer peripheral surface 2a of the insertion portion 2 inserted into the receiving portion 3 in a watertight manner. Further, at the insertion position where the insertion portion 2 is inserted into the receiving portion 3, the insertion tube distal end surface 4 a which is the distal end of the insertion portion 2 disposed in the receiving portion 3 and the inner side of the receiving portion 3. It is isolated from the formed back end surface 3a with a predetermined length R in the tube axis direction.

  As shown in FIG. 2 and FIG. 3, a recess 7 is opened at the tip of the inner surface of the receiving portion 3 toward the outer peripheral surface 2 a of the insertion portion 2 inserted into the receiving portion 3. Furthermore, a locking portion 8 for locking the insertion portion 2 inserted into the receiving portion 3 is housed and disposed in the recess 7, and the locking portion 8 is disposed on the outer peripheral surface 2 a of the insertion portion 2. A bolt hole 10 for screwing a bolt 9 as a pressing portion in the present invention that is pressed toward is formed.

  Specifically, the recesses 7 are formed at eight locations along the circumferential direction by being partitioned by partition walls 3 b provided at predetermined intervals in the circumferential direction of the inner surface of the receiving port 3. And the latching | locking part 8 is arrange | positioned in these recessed parts 7 in the state which clamped the rubber body 11 with the circumferential direction both ends and the partition wall 3b.

  The locking portion 8 is formed in a side view angle shape, and has a first claw 8 a and a second claw 8 b that are locked to the outer peripheral surface 2 a of the insertion portion 2. Among these, the 1st nail | claw 8a is formed in the edge part at the side of the receiving pipe front-end | tip surface 5a of the pipe axis direction which is the front-end | tip of the receiving pipe 5 in the latching | locking part 8, and the 2nd nail | claw 8b is a pipe axial direction. Is formed at the end of the insertion tube distal end surface 4a side. Furthermore, a bulging portion 8 d that protrudes toward the insertion tube distal end surface 5 a side in the tube axis direction is formed on the side surface of the locking portion 8 on the insertion tube distal end surface 5 a side in the tube axis direction.

  On the other hand, as shown in FIG. 3, an inner wall 7a is formed in the recess 7 as an opposing surface in the present invention that opposes the bulging portion 8d. The inner wall 7a is formed in a substantially vertical plane with respect to the outer peripheral surface 2a of the insertion portion 2, and the bulging portion 8d is disposed in the recess 7 so as to contact the inner wall 7a.

  At the end portion of the locking portion 8 facing the radially outward side of the insertion tube 4, the outer surface 2 a of the insertion portion 2 extends radially toward the insertion tube distal end surface 4 a side in the tube axis direction. On the other hand, it is formed on an inclined surface 8c as an inclined portion in the present invention, which is inclined at an inclination angle θ.

  On the other hand, the bolt hole 10 is inclined at the same inclination angle θ from the direction perpendicular to the tube axis from the outside of the receiving portion 3 to the inside of the recessed portion 7 toward the receiving tube tip surface 5a side in the tube axis direction. Is formed. For this reason, when the bolt 9 is screwed into the bolt hole 10, the bottom surface 9a disposed in the recess 7 of the bolt 9 is inclined at an inclination angle θ with respect to the outer peripheral surface 2a of the insertion portion 2. As a result, the bottom surface 9a of the bolt 9 and the inclined surface 8c are brought into surface contact with each other, and the locking portion 8 is pressed toward the outer peripheral surface 2a of the insertion portion 2 from the inclined surface 8c. The claw 8 b is locked to the outer peripheral surface 2 a of the insertion portion 2. That is, the bottom surface 9a of the bolt 9 forms an inclined portion in the present invention together with the inclined surface 8c.

  By configuring the movement preventing means as described above, as shown in FIG. 4, when the insertion tube 4 moves from the insertion position in a direction away from the reception tube 5 indicated by the black arrow, the locking portion 8 is The inclined surface 8 c receives a pressing force directed from the bottom surface 9 a of the bolt 9 toward the radially inner side of the insertion tube 4. The pressing force directed toward the radially inner side of the insertion tube 4 deepens the locking of the first claw 8a and the second claw 8b with respect to the outer peripheral surface 2a of the insertion portion 2; The detachment of the mouth tube 4 from the receiving tube 5 is prevented.

  Furthermore, the movement preventing means of the present embodiment not only prevents the insertion tube 4 from being detached from the receiving tube 5 as described above, but also prevents the insertion tube 4 from being excessively inserted into the receiving tube 5. Be able to.

  Specifically, as shown in FIGS. 3, 5 (a) and 5 (b), when the insertion tube 4 moves in the insertion direction with respect to the reception tube 5 indicated by the black arrow from the insertion position, The locking portion 8 tries to move in the recess 7 together with the insertion tube 4 toward the insertion tube distal end surface 4a side in the tube axis direction, and the bulging portion 8d presses the inner wall 7a.

  The locking portion 8 is caused by pressing the inner wall 7 a, the reaction from the inner wall 7 a to the receiving tube distal end surface 5 a side in the tube axis direction, and the insertion tube 4 in the insertion direction with respect to the receiving tube 5. The insertion port 2 by moving to the tube axis direction pulls the first claw 8a toward the receiving tube tip surface 5a side in the tube axis direction, and the receiving tube tip in the tube axis direction with the bulging portion 8d as the center O It turns toward the surface 5a side.

  Furthermore, the locking portion 8 rotates about the bulging portion 8d as the center O, so that the inclined surface 8c and the bottom surface 9a of the bolt 9 are brought into substantially line contact only with the contact portion P. The abutting portion P moves on the inclined surface 8c toward the end on the receiving tube distal end surface 5a side in the tube axis direction as the locking portion 8 rotates about the bulging portion 8d.

  At this time, the first claw 8 a has a force that the insertion portion 2 pulls the first claw 8 a toward the receiving tube distal end surface 5 a side in the tube axis direction, and a bolt that the locking portion 8 receives at the contact portion P. 9, the engagement of the first claw 8a to the outer peripheral surface 2a of the insertion portion 2 is further deepened by the pressing force directed to the outer peripheral surface 2a of the insertion portion 2 from 9 and the distal end of the insertion tube When the surface 4a and the back end surface 3a abut (R = 0), the insertion tube 4 is prevented from being excessively inserted into the reception tube 5 where the insertion portion 2 and the reception portion 3 are damaged. ing.

  In the present embodiment, the locking portion 8 is formed with an inclined surface 8c that forms an inclination angle θ with the outer peripheral surface 2a of the insertion portion 2, and the bolt hole 10 extends in the direction of the tube axis from the direction perpendicular to the tube axis. The bottom surface 9a of the bolt 9 screwed into the bolt hole 10 and the inclined surface 8c are brought into surface contact with each other by forming an inclination at the inclination angle θ on the receiving tube tip surface 5a side. If 4 can move in the direction of detachment from the receiving tube 5, the locking portion 8 can be pressed by the bolt 9 to deepen the locking of the second claw 8 b to the outer peripheral surface 2 a of the insertion portion 2. The bolt hole 10 may be formed so as to be perpendicular to the tube axis, and the inclined surface 8a may be formed at the end of the locking portion 8 facing the radially outward side of the insertion tube 4 or vice versa. In addition, the bolt hole 10 is inclined from the direction perpendicular to the tube axis from the outside of the receiving portion 3 to the inside of the recess 7 toward the receiving tube tip surface 5a side in the tube axis direction. The end portion of the locking portion 8 that faces the outer side in the radial direction of the insertion tube 4 may be formed horizontally in the tube axis direction.

  Next, the movement preventing means according to the second embodiment will be described with reference to FIGS. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted. The movement preventing means in the first embodiment has been described with respect to over-insertion from the state in which the bulging portion 8d and the inner wall 7a are in contact with each other, but the space between the bulging portion 8d and the inner wall 7a is as shown in FIG. , They may be separated by a predetermined length L1.

  In this case, as shown in FIGS. 7A to 7C, when the insertion tube 4 moves from the insertion position in the insertion direction with respect to the reception tube 5 indicated by the black arrow, the locking portion 8 is Then, it moves in the recess 7 together with the insertion tube 4 toward the insertion tube distal end surface 4a side in the tube axis direction, and the bulging portion 8d and the inner wall 7a come into contact with each other. At this time, a gap L2 is formed between the inclined surface 8c and the bottom surface 9a of the bolt 9.

  The locking portion 8 has a gap L2 formed between the inclined surface 8c and the bottom surface 9a of the bolt 9, so that the bulging portion 8d is in contact with the inner wall 7a by the bulging portion 8d, thereby causing the locking portion 8 to move in the tube axis direction. It is pressed toward the receiving tube distal end surface 5a side and rotates around the first claw 8a toward the receiving tube distal end surface 5a side in the tube axis direction. In addition, the bulging portion 8d moves along the inner wall 7a toward the radially outer side of the insertion tube 4.

  Furthermore, when the locking portion 8 rotates about the first claw 8a as the center Q, the inclined surface 8c contacts the bottom surface 9a of the bolt 9 at the contact portion P, and the rotation center of the locking portion 8 is the first. Transition from the claw 8a to the bulging portion 8d. Further, when the insertion tube 4 further moves in the insertion direction with respect to the receiving tube 5, the locking portion 8 causes the insertion portion 2 to move the first claw 8 a toward the receiving tube front end surface 5 a side in the tube axis direction. The bulging portion 8d is rotated about the rotation center O by the force of pulling in. The bulging portion 8d has the inner wall 7a facing outward in the radial direction of the receiving tube 5 as the insertion of the insertion tube 4 into the receiving tube 5 proceeds, and the contact portion P As it rotates about the bulging portion 8d, it moves on the inclined surface 8c toward the end on the receiving tube distal end surface 5a side in the tube axis direction.

  At this time, the first claw 8 a has a force that the insertion portion 2 pulls the first claw 8 a toward the receiving tube distal end surface 5 a side in the tube axis direction, and a bolt that the locking portion 8 receives at the contact portion P. 9 is applied to the outer peripheral surface 2a of the insertion portion 2, and the second claw 8b is separated from the outer peripheral surface 2a of the insertion portion 2, instead of the insertion portion 2 of the first claw 8a. Locking to the outer peripheral surface 2a is deepened, and overinsertion of the insertion tube 4 into the receiving tube 5 is prevented.

  In addition, although both Example 1 and Example 2 demonstrated the example in which the latching with respect to the outer peripheral surface 2a of the insertion part 2 of the 1st nail | claw 8a was deepened, the position to the radial direction of the bulging part 8d is demonstrated. Depending on the angle between the inner wall 7a and the outer peripheral surface 2a of the insertion portion 2, the engagement of the first claw 8a with the outer peripheral surface 2a of the insertion portion 2 may be deepened.

  As described above, in the movement preventing means in the present embodiment, the inner wall 7a facing the insertion direction of the insertion tube 4 is formed in the recess 7, and the locking portion 8 bulges toward the inner wall 7a. And a bulging portion 8d that is arranged in the recess 7 so as to be pressed by the bolt 9 in a state of being separated from the inner wall 7a and to rotate around the bulging portion 8d that is in contact with the inner wall 7a. Accordingly, the locking portion 8 moves the first claw 8a and the second claw 8b to the end of the tube-insertion tube 4 end by moving the tube-insertion tube 4 toward the tube-portion insert tube 4 end side. Since the pulling force acts on the part side, the pressing force directed from the contact portion P between the locking portion 8 and the bolt 9 toward the outer peripheral surface 2a of the insertion portion 2 acts via the inclined surface 8c and the bottom surface 9a. At least the first claw 8a is deeply locked by the outer peripheral surface 2a of the insertion portion 2, and the insertion tube 4 is excessively inserted into the reception tube 5. It is prevented.

  Next, the movement preventing means according to the third embodiment will be described with reference to FIG. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted. In the first and second embodiments, the movement preventing means is configured such that the locking portion 8 is formed in a side viewing angle shape, and the bulging portion 8d is moved when the insertion tube 4 moves further in the insertion direction with respect to the reception tube 5. The insertion portion 4 is prevented from being excessively inserted into the receiving tube 5 by rotating the locking portion 8 around the contact portion O between the inner wall 7a and the inner wall 7a. For example, FIG. 8 (a) and FIG. As shown in (b), when the locking portion 8 rotates in the recess 7 with the bulging portion 8d as the center O, the contact portion P that contacts the end portion disposed in the recess 7 of the bolt 9 is provided. An end of the inclined tube 8c side of the insertion tube distal end surface 4a in the tube axis direction may be formed on the curved surface 8e.

  In this case, when the insertion tube 4 moves in the direction of further insertion with respect to the receiving tube 5, the abutting portion P becomes curved surface 8 e as insertion of the insertion tube 4 into the receiving tube 5 proceeds. Since the upper part moves, the locking part 8 rotates smoothly in the recess 7.

  In the present embodiment, the end portion of the inclined surface 8c in the tube axis direction on the side of the receiving tube 5 is formed on the curved surface 8e as described above, but the curved surface is formed on the end portion disposed in the concave portion 7 of the bolt 9. Alternatively, it may be formed at both the end of the inclined surface 8c in the tube axis direction on the side of the receiving tube 5 and the end of the bolt 9 disposed in the recess 7.

  As described above, in the movement preventing means according to the third embodiment, at least one of the end portions on the contact portion P side between the bolt 9 and the locking portion 8 is formed in the curved surface 8e. When the locking portion 8 rotates around the contact portion P with the stop portion 8, the end portions of the bolt 9 and the locking portion 8 come into contact with each other so that the bolt 9 and the locking portion 8 are in contact with each other. Since the stress is not concentrated, the bolt 9 and the locking portion 8 are not easily damaged, and the locking portion 8 can be smoothly rotated.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the fluid pipe 1 is described as a water supply pipe. However, the fluid flowing in the fluid pipe 1 may be a liquid other than water such as petroleum, or a mixture of liquid and gas. There may be.

  Moreover, in the said Example, the recessed part 7 is formed in the front-end | tip part of the receptacle part 3, and the 1st nail | claw 8a and 2nd are pressed by pressing the latching | locking part 8 accommodated and arrange | positioned in the receptacle part 3 with the volt | bolt 9. The claw 8b is locked to the outer peripheral surface 2a of the insertion portion 2, but the recess is formed in a push ring having a separate structure separate from the receiving tube 5, and the insertion portion 2 is disposed at the insertion position. After fixing the press ring from the outside of the receiving portion 3 by flange connection or the like, the locking portion housed in the recess is pressed from the outside of the press ring toward the outer peripheral surface 2 a of the insertion portion 2 by a bolt. Thus, the first claw and the second claw may be engaged with the outer peripheral surface 2 a of the insertion portion 2.

DESCRIPTION OF SYMBOLS 1 Fluid pipe 2 Insertion part 2a Outer peripheral surface 3 Receptacle part 4 Insertion pipe 4a Insertion pipe tip surface 5 Receptacle pipe 5a Receptacle pipe tip surface 7 Recess 7a Inner wall (opposite surface)
8 Locking portion 8a First claw 8b Second claw 8c Inclined surface (inclined portion)
8d bulging part 8e curved surface 9 bolt (pressing part)
9a Bottom (inclined part)
10 Bolt hole

Claims (2)

A first claw that is formed along the circumferential direction of the insertion portion of the insertion tube and that is engaged with the outer peripheral surface of the insertion portion, and is spaced from the first claw to the insertion tube end side in the tube axis direction A locking portion having a second claw that is disposed and locked with the outer peripheral surface of the insertion portion, and an outer peripheral surface of the insertion portion that is formed in a receiving portion of a receiving tube into which the insertion portion is inserted. A recess that opens toward the housing and stores the locking portion therein, and a pressing portion that presses the locking portion toward the outer peripheral surface of the insertion portion in the recess,
At least one of the abutting portions of the pressing portion and the locking portion is formed in an inclined portion that inclines in the diameter increasing direction toward the insertion tube end in the tube axis direction,
The locking portion is pressed by the pressing portion via the inclined portion to lock the first claw and the second claw on the outer peripheral surface of the insertion portion, and the insertion tube A movement preventing means for preventing separation from the receiving pipe,
A facing surface facing the insertion direction of the insertion tube is formed in the recess, and the facing surface is formed in a substantially vertical surface with respect to the outer peripheral surface of the insertion portion ,
The locking portion includes a bulging portion that bulges toward the facing surface, and is disposed by being pressed by the pressing portion in the recess, and the locking portion rotates around the first claw. By doing so, the abutting portion between the pressing portion and the locking portion is in contact, and the locking portion is formed and arranged so as to rotate around the bulging portion in contact with the facing surface. The movement preventing means characterized by the above.   The movement preventing means according to claim 1, wherein at least one of end portions of the pressing portion and the locking portion on the contact portion side is formed in a curved shape.

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