JP5463238B2 - Device for inserting retaining member and method for inserting retaining member - Google Patents

Description

  The present invention relates to an apparatus and a method for inserting a retaining member that can be locked to an outer peripheral surface of a fluid pipe into an accommodation groove formed in an annular housing that is mounted surrounding the fluid pipe.

  As disclosed in FIGS. 7 to 9 of Patent Document 1 below, the insertion port formed at the end of the other fluid pipe is inserted into the receiving port formed at the end of one fluid pipe. The retaining member disposed on the inner peripheral side of the receiving portion is locked to the outer peripheral surface of the inserting portion so that the fluid pipe having the inserting portion can be prevented from moving in the tube axis direction. Constructed pipe joints are known. In such a pipe joint, the receiving port portion becomes an annular housing that is mounted so as to surround the insertion port portion, and the retaining member is housed in the housing groove formed in the housing.

  In addition, as disclosed in FIGS. 2 to 4 of the above-mentioned document, the sealing material that seals between the inner periphery of the receiving portion and the outer periphery of the insertion portion is pressed with an annular fitting called a push ring. A pipe configured to prevent the fluid pipe having the insertion portion from moving in the tube axis direction by locking the retaining member disposed on the inner peripheral side of the push wheel to the outer peripheral surface of the insertion portion. Joints are also known. In such a pipe joint, the pusher wheel becomes an annular housing that is mounted so as to surround the insertion portion, and the retaining member is accommodated in an accommodation groove formed in the housing.

  In the operation of assembling the fluid pipe movement prevention device as described above, it is necessary to insert the retaining member with high accuracy into the housing groove of the housing such as the receiving part and the push ring. Temporarily, the amount of the retaining member inserted into the housing groove If variations occur in the position of the inserted retaining member or the posture of the inserted retaining member is broken, the retaining action of the retaining member with respect to the outer peripheral surface of the insertion portion tends to be difficult to be exhibited stably. Further, from the viewpoint of productivity, it is desired to propose a method suitable for mass production because the work efficiency when inserting the retaining member is increased.

JP-A-61-88091

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a retaining member insertion device and a retaining member insertion method capable of accurately and efficiently inserting the retaining member into the housing groove of the housing. There is.

  The above object can be achieved by the present invention as described below. That is, the retaining member insertion device according to the present invention inserts a retaining member that can be locked to the outer peripheral surface of the fluid pipe into an accommodation groove formed in an annular housing that surrounds and is attached to the fluid pipe. In the retaining member insertion device, a pressing portion having a pressing head that presses against the retaining member from the inside, a head driving mechanism that drives the pressing head in a radial direction of the fluid pipe, and the inside of the housing The pressing portion is driven in the tube axis direction relative to the housing so that the pressing head is displaced between a position disposed inside the housing groove and a position disposed outside the housing. A pressing portion driving mechanism.

  According to the retaining member insertion device of the present invention, the pressing portion is driven by the pressing portion driving mechanism to place the pressing head inside the housing groove inside the housing, and then the pressing head is fluidized by the head driving mechanism. Since the tube can be driven in the radial direction, the retaining member can be efficiently and efficiently inserted into the housing groove. In addition, the use of the head drive mechanism can increase the working efficiency when inserting the retaining member, and is therefore suitable for mass production.

  In the retaining member insertion device of the present invention, when the pedestal is provided in the pressing portion and the pressing head is disposed inside the receiving groove, the seating surface of the pedestal is an inner wall surface on the back side of the receiving groove. Those arranged at a height of 2 are preferable. In this case, the presence of the pedestal can stably place the retaining member in a stable manner, and can prevent the temporarily retained retaining member from dropping and improve workability. As a result, the retaining member can be more accurately and efficiently inserted into the housing groove.

  In the retaining member insertion device of the present invention, the pressing portion is provided with a support portion capable of contacting the inner peripheral surface of the housing in a direction opposite to the driving direction of the pressing head by the head driving mechanism. Those are preferred. According to such a configuration, it is possible to prevent the housing from being tilted or moved due to pressing when the retaining member is inserted into the receiving groove by driving the pressing head, and the retaining member can be inserted with higher accuracy. it can.

  In the retaining member insertion device of the present invention, it is preferable to include a rotation mechanism that rotates the housing relative to the pressing portion. With such a configuration, the retaining member can be pressed one after another toward the receiving groove by a simple operation while changing the circumferential position of the pressing head with respect to the housing, so that the retaining member can be inserted more efficiently. .

  In the method of inserting the retaining member according to the present invention, the retaining member that can be locked to the outer peripheral surface of the fluid pipe is inserted into the housing groove formed in the annular housing that surrounds and is attached to the fluid pipe. In the method of inserting the retaining member, the step of moving the pressing portion relative to the housing set up with the tube axis direction up and down, and placing the pressing head of the pressing portion inside the receiving groove; Temporarily placing a retaining member in the housing groove; driving the pressing head in a radial direction of the fluid pipe; and pressing the temporarily placed retaining member with the pressing head and inserting the retaining member into the housing groove; , Are provided.

  In the method for inserting the retaining member according to the present invention, the retaining member temporarily placed in the housing groove can be pressed by driving the pressing head in the radial direction of the fluid pipe. Can be inserted well. Moreover, since the working efficiency when inserting the retaining member can be increased, it is also suitable for mass production.

  In the retaining member insertion method of the present invention, before the step of temporarily placing the retaining member, a pedestal is inserted into the housing, and the seat surface of the pedestal is placed on the inner wall surface on the back side of the housing groove. Those arranged at a height are preferred. In this case, the retaining member can be stably placed temporarily by inserting the pedestal inside the housing, and workability can be improved by preventing the temporarily placed retaining member from dropping. As a result, the retaining member can be more accurately and efficiently inserted into the housing groove.

  In the retaining member insertion method of the present invention, when the retaining member is pressed by the pressing head, the pressing portion contacts the inner peripheral surface of the housing in the direction opposite to the driving direction of the pressing head. What is supported is preferred. According to such a method, it is possible to prevent the housing from being tilted or moved due to pressing when the retaining member is inserted into the receiving groove by driving the pressing head, and the retaining member can be inserted with higher accuracy. it can.

Longitudinal sectional view of the pipe joint (AA sectional view of FIG. 2) Front view of the receptacle Development view when the receiving part is viewed from the inner periphery (A) BB sectional view and (b) CC sectional view of the retaining member shown in FIG. Side view showing fluid pipe longitudinal section and insertion device Side view when the pressing part is lowered Plan view when the pressing part is lowered Side view when the retaining member is temporarily placed Top view when the retaining member is temporarily placed Side view when the retaining member is inserted into the receiving groove Top view when the retaining member is inserted into the receiving groove Longitudinal sectional view of a fluid pipe having a receiving part

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the configuration of the fluid pipe movement prevention device will be briefly described with reference to FIGS.

  In the pipe joint shown in FIGS. 1 and 2, the insertion port 2 formed at the end of the fluid pipe P <b> 2 is inserted into the reception port 1 formed at the end of the fluid pipe P <b> 1. Is sealed with an annular sealing material 3. In this embodiment, the fluid pipes P1 and P2 are water ducts made of ductile cast iron. However, the present invention is not limited to this, and other fluid pipes such as gas pipes and plant pipes may be used. The receiving portion 1 may be formed at the end of a pipe joint body interposed between two fluid pipes.

  The receiving portion 1 is an annular housing that is mounted so as to surround the insertion portion 2, and an accommodation groove 4 that opens toward the insertion portion 2 is formed in an annular shape on the inner peripheral side thereof, and in the pipe circumferential direction. A plurality of (four in the present embodiment) retaining members 6 arranged are accommodated. The retaining member 6 has a claw 8 having a triangular cross section curved along the outer peripheral surface of the insertion portion 2 on the inner peripheral surface, and is configured to be able to be locked to the outer peripheral surface of the insertion portion 2. On each outer peripheral side of the retaining member 6, a push bolt 7 is screwed into a screw hole penetrating the outer peripheral wall of the receiving groove 4, so that the retaining member 6 can be pressed toward the insertion portion 2. Yes.

  In the state of FIG. 1, when the insertion port 2 is about to come out from the receiving port 1, the locking operation of the retaining member 6 with respect to the outer peripheral surface of the insertion port 2 prevents the fluid tube P <b> 2 from moving in the tube axis direction. The detachment of the insertion portion 2 is prevented. Moreover, in this embodiment, the inclined surface 6a is formed in the outer peripheral surface of the retaining member 6, and when the force which the insertion part 2 pulls out acts, the front-end | tip of the push bolt 7 is retained by the wedge effect. 6 is pressed to the inner peripheral side, the contact resistance of the claw 8 with respect to the outer peripheral surface of the insertion portion 2 is increased, and the movement preventing effect by the retaining member 6 is enhanced.

  As shown in FIGS. 1, 3, and 4, in this embodiment, two claws 8 are provided at intervals in the tube axis direction, and between the retaining members 6 adjacent in the tube circumferential direction, the claws 8 Are arranged so as to overlap in the tube axis direction. Thereby, the contact area of the claw 8 with respect to the outer peripheral surface of the insertion portion 2 is continuously formed in the pipe circumferential direction, and the movement preventing effect by the retaining member 6 is remarkably improved. In the structure in which the claws 8 are overlapped as described above, it is important to insert the retaining member 6 with high accuracy into the housing groove 4 so that the claws 8 do not interfere between adjacent retaining members 6. .

  The retaining member 6 is fitted into the receiving groove 4 via the movement restricting member 11 and the holding member 12, and is held so as not to drop off from the receiving portion 1. The movement restricting member 11 and the holding member 12 are respectively attached to the side surfaces 61 and 62 of the retaining member 6, and in the present embodiment, both are made of sheet-like rubber. The movement restricting member 11 is preferably made of an elastic material and is harder than the holding member 12. The holding member 12 is preferably formed of an elastic material such as rubber or urethane.

  The holding member 12 always abuts against the inner wall surface 42 on the back side of the housing groove 4 and biases the retaining member 6 toward the inner wall surface 41 on the near side of the housing groove 4. For this reason, a gap D corresponding to the thickness of the movement restricting member 11 is provided between the side surface 61 and the inner wall surface 41 of the retaining member 6. When a force is applied to pull out the insertion portion 2, the retaining member 6 moves toward the inner wall surface 41 accordingly, but at this time, the claw 8 can be locked to the outer peripheral surface of the insertion portion 2. It is determined on the basis of the interval D in a different state.

  In order to stably exhibit the function of preventing the movement of the fluid pipe P2 in the pipe axis direction, it is effective to suppress variation in the movement allowance of the retaining member 6. For example, if the movement allowance is different between the retaining member 6 located above the fluid pipe P2 and the retaining member 6 located below the fluid pipe P2, the movement preventing effect is hardly stably exhibited. In particular, when a strong load is applied to the fluid pipe P2, the ultimate performance may be affected by variations in the movement allowance of the retaining member 6.

  In this pipe joint, the push bolt 7 tries to push the retaining member 6 in an oblique direction, but the holding member 12 comes into contact with the inner wall surface 42 and the distance D is held constant via the movement restricting member 11. Therefore, the movement allowance of the retaining member 6 is determined without being influenced by the pushing amount or the groove width of the receiving groove 4. As a result, even when the push-in amounts by the push bolts 7 are different from each other, or even when the housing is a casting (for example, cast iron) and the dimensional tolerance is large, variation in the movement allowance of the retaining member 6 is suppressed, The effect of preventing the movement of the pipe P2 can be stably exhibited.

  Next, an insertion device for inserting the retaining member 6 into the receiving groove 4 of the receiving port 1 that is a housing and an insertion method thereof will be described. In FIGS. 1, 7A and 8A, the retaining member 6 is depicted in a side view as viewed from the circumferential direction.

  As shown in FIG. 5, the insertion device 5 includes a pressing portion 51 and an air cylinder 52, and a fluid pipe P <b> 1 with the receiving port portion 1 facing upward is provided on the side. A retaining member 6 is not yet built in the receiving groove 4 of the receiving portion 1. As will be described later, the pressing portion 51 includes a pressing head 53 that presses against the retaining member 6 from the inside, and an air cylinder 54 that drives the pressing head 53 in the radial direction of the fluid pipe P1. Therefore, in the present embodiment, the head driving mechanism is constituted by the air cylinder 54.

  The air cylinder 52 moves the drive rod 52 a connected to the pressing portion 51 up and down to drive the pressing portion 51 relative to the receiving portion 1 in the tube axis direction. Along with this, the pressing head 53 is positioned inside the receiving groove 1 inside the receiving groove 4 (see FIG. 6A), and positioned outside the receiving port 1 (see FIG. 5). Displace between. Thus, in the present embodiment, the pressing portion driving mechanism is configured by the air cylinder 52. The driven rod 55 a is connected to the pressing portion 51 so as to take the center of gravity, and is configured to be able to advance and retract from the cylinder 55 as the air cylinder 52 is driven.

  When inserting the retaining member 6 into the receiving groove 4, first, as shown in FIG. 5, the pressing portion 51 is moved up and down relatively with respect to the receiving portion 1 placed with the tube axis direction up and down. The pressure head 53 is arranged inside the accommodation groove 4 as in 6B. In the present embodiment, when the pressing portion 51 is lowered, the receiving portion 1 is sandwiched between a hanging-shaped guide portion 59 provided in the pressing portion 51 and a support portion 57 to be described later. And the receiving portion 1 are guided so that the relative position in the radial direction is determined.

  When the pressing head 53 is disposed inside the receiving groove 4, the retaining member 6 is temporarily placed in the receiving groove 4 as shown in FIGS. 7A and 7B. The temporary placement may be performed manually by the operator, and the retaining member 6 is lightly fitted inside the housing groove 4 in the radial direction. In this example, the retaining member 6 is set slightly diagonally so that the protruding portion of the holding member 12 is hooked.

  In the present embodiment, when the pedestal 56 is provided in the pressing portion 51 and the pressing head 53 is disposed inside the accommodation groove 4, the seat surface 56 a of the pedestal 56 is disposed at the height of the inner wall surface 42 of the accommodation groove 4. The Therefore, the retaining member 6 can be temporarily placed stably, and the workability can be improved by preventing the temporarily placed retaining member 6 from dropping. As long as such an effect is obtained, the position of the seating surface 56 a may be slightly higher or lower than the inner wall surface 42. The pedestal 56 is formed in a flat plate shape, but may have a different shape.

  The pedestal 56 is raised and lowered together with the pressing head 53 by driving the air cylinder 52, and when the pressing head 53 is arranged inside the receiving groove 4, the seating surface 56a is set at the height of the inner wall surface 42 accordingly. Has been. Therefore, in the present embodiment, before the retaining member 6 is temporarily placed, the pedestal 56 is inserted into the receiving portion 1, and the seat surface 56a is disposed at the height described above. However, the step of temporarily placing the retaining member 6 may be before or after the step of disposing the pressing head 53 inside the receiving groove 4.

  Subsequently, as shown in FIGS. 8A and 8B, the drive rod 54 a of the air cylinder 54 is protruded, the pressing head 53 is driven in the radial direction of the fluid pipe P 1, and the temporarily placed retaining member 6 is moved by the pressing head 53. Press to insert into the receiving groove 4. Thereby, since the insertion amount of the retaining member 6 with respect to the housing groove 4 can be made constant, and the inserting operation of the retaining member 6 is performed semi-automatically, the retaining member 6 can be inserted into the housing groove 4 with high accuracy and efficiency. .

  In the present embodiment, since the retaining member 6 to which the movement restricting member 11 and the holding member 12 are attached is fitted in the accommodation groove 4, it is necessary to press the retaining member 6 firmly and press-fit. The insertion amount of the retaining member 6 with respect to the groove 4 is likely to vary, but according to such an insertion method, the retaining member 6 can be accurately inserted into the housing groove 4.

  The pressing head 53 presses against the inner peripheral surface of the retaining member 6 from the radially inner side. Therefore, it is preferable to attach a cushioning material such as rubber to the pressing head 53 so as not to damage the claw 8 of the retaining member 6. Alternatively, it is also effective to adjust the tip shape of the retaining member 6 so that a portion other than the claw 8 of the retaining member 6 (for example, between the two claws 8) can be pressed. In this embodiment, the pressing head 53 protrudes on both sides in the circumferential direction as shown in FIGS. 6B and 7B so as not to press the retaining member 6 toward one side in the circumferential direction. However, the present invention is not limited to this.

  The pressing portion 51 is a support portion capable of contacting the inner peripheral surface of the receiving portion 1 in a direction opposite to the driving direction of the pressing head 53 by the air cylinder 54 (left direction in FIG. 8A) (right direction in FIG. 8A). 57 is provided. In this way, the pressing portion 51 is in contact with and supported by the inner peripheral surface of the receiving portion 1, so that the receiving portion 1 (that is, the fluid) is accompanied by pressing when the retaining member 6 is inserted by the pressing head 53. It is possible to prevent the pipe P1 from being inclined or moving, and thus the retaining member 6 can be inserted with higher accuracy.

  In the present embodiment, since the support portion 57 abuts on the inner side of the inner wall surface 42 of the receiving groove 4, the posture of the receiving portion 1 is made to resist the pressing force of the pressing head 53 located at substantially the same height in a balanced manner. It can be held well. However, the present invention is not limited to this, and the support portion is brought into contact with the inner peripheral surface of the receiving portion 1 in the vicinity of the back end 1a (see FIG. 5) of the receiving portion 1 or in the vicinity of the end surface of the receiving portion 1. It may also be abutted at these multiple locations.

  When the retaining member 6 is inserted into the receiving groove 4 and the drive rod 54a is retracted, the receiving portion 1 (that is, the fluid pipe P1) is rotated in the circumferential direction, and the retaining groove 4 is not yet removed as shown in FIG. 6A. A portion where the member 6 is not inserted is opposed to the pressing head 53. Then, the retaining member 6 is temporarily placed in the same manner as described above, and the retaining member 6 is inserted by driving the air cylinder 54. In the present embodiment, since the four retaining members 6 are built in, all the insertion operations are completed by repeating this operation four times.

  The insertion device 5 includes a turntable 58 as a rotation mechanism that rotates the receiving portion 1 relative to the pressing portion 51. The turntable 58 has a mechanism such as a potter's wheel, for example, and rotatably supports the fluid pipe P1 placed thereon. The rotation mechanism included in the insertion device 5 may be configured to rotate the insertion device 5 side instead of the receiving port 1 side.

  In the present embodiment, the claws 8 are arranged between the adjacent retaining members 6 so as to overlap each other in the tube axis direction. However, according to the present invention, the retaining members 6 can be inserted with high accuracy, so It is easy to prevent interference between the claws 8 between the members 6. After the insertion of all the retaining members 6 is completed, the pressing portion 51 is raised and the pressing head 53 is arranged outside the receiving portion 1 and the push bolt 7 and the sealing material 3 are attached. It can use for the movement prevention apparatus of fluid pipes like 1 and 2.

  In the present embodiment, an example is shown in which the claws 8 are arranged so as to overlap each other between the adjacent retaining members 6 in the tube axis direction, but the present invention is not limited to this, and the claws 8 overlap in the tube axis direction. It does not matter if the arrangement is not necessary. In such a case, the accommodation groove 4 may be provided intermittently in the circumferential direction independently for each retaining member 6. Moreover, the number of the nail | claw 8 which the retaining member 6 has may be one or three or more irrespective of the adoption of such arrangement | positioning of a nail | claw.

  In the present embodiment, an example in which the receiving portion of the fluid pipe is a housing is shown. However, the present invention is not limited to this, and a sealing material interposed between the inner periphery of the receiving portion and the outer periphery of the insertion portion is a tube. An annular push ring that can be pressed in the axial direction (for example, see JP-A-11-63328) may be used as the housing. Such a push ring is mounted so as to surround the insertion portion, and a retaining member is housed in a housing groove formed on the inner peripheral side to constitute a fluid pipe movement prevention device. As for the other structure of the press ring, a known structure in this technical field can be used without limitation.

  Furthermore, in the present invention, a reinforcing metal fitting having a hook that engages with the flange of the receiving portion when a force is applied to surround the insertion portion of the pipe joint and the insertion portion is pulled out from the receiving portion (for example, Japanese Patent Laid-Open No. 10-122466) or a non-average force support device (see, for example, Japanese Patent Laid-Open No. 2002-243066) that is mounted so as to surround the fluid pipe may be used as the housing. Such reinforcing metal fittings and support devices constitute a fluid pipe movement prevention device by accommodating a retaining member in a housing groove formed on the inner peripheral side thereof.

  The housing is not limited to being integrally formed as an annular body, but may be a split structure formed in an annular shape by assembling peripheral ends of a plurality of divided pieces. In addition, the receiving portion 1 as the housing described above is provided with the push bolt 7 that presses the retaining member 6 toward the insertion portion 2. However, the present invention is not limited to this. You may make it press by the wedge effect in the outer peripheral wall.

  In the above-described embodiment, an example in which an air cylinder is employed as the actuator of the head driving mechanism and the pressing unit driving mechanism has been described. However, the present invention is not limited to this, and the pressing head or Any actuator that can drive the pressing portion can be used without particular limitation.

  In the above-described embodiment, an example in which the pressing portion 51 includes the pedestal 56 has been described. However, the pedestal may be omitted, or the pedestal may be a separate member from the pressing portion. In the example of FIG. 9, a pedestal 9 made of a bottomed cylindrical body that can be placed on the back end 1 a of the receiving portion 1 is inserted, and the seating surface 9 a of the pedestal 9 is the height of the inner wall surface 42 of the receiving groove 4. Is arranged. If the pressing head is disposed inside the housing groove 4 and the retaining member is temporarily placed, the retaining member can be inserted as described above.

1 Receiving part (an example of housing)
2 Inserting Portion 4 Housing Groove 5 Inserting Device 6 Detachment Member 8 Claw 11 Movement Restricting Member 12 Holding Member 41 Inner Wall Surface 42 Inner Wall Surface 51 Pressing Portion 52 Air Cylinder (Pressing Portion Drive Mechanism)
53 Pressing Head 54 Air Cylinder (Head Drive Mechanism)
56 pedestal 56a seating surface 57 support part 58 turntable (rotation mechanism)
P1 Fluid pipe P2 Fluid pipe

Claims (7)

In a retaining member insertion device for inserting a retaining member that can be locked to the outer peripheral surface of the fluid pipe into an accommodation groove formed in an annular housing that is mounted to surround the fluid pipe.
A pressing portion having a pressing head that presses against the retaining member from the inside, and a head driving mechanism that drives the pressing head in a radial direction of the fluid pipe;
The pressing portion is moved relative to the housing so that the pressing head is displaced between a position arranged inside the housing groove inside the housing and a position arranged outside the housing. An apparatus for inserting a retaining member, comprising: a pressing portion driving mechanism that drives in a tube axis direction.   The pedestal is provided in the pressing portion, and the seat surface of the pedestal is arranged at the height of the inner wall surface on the back side of the receiving groove when the pressing head is arranged inside the receiving groove. The insertion device of the retaining member as described.   The retaining member according to claim 1, wherein the pressing portion is provided with a support portion capable of contacting the inner peripheral surface of the housing in a direction opposite to a driving direction of the pressing head by the head driving mechanism. Insertion device.   The insertion device for a retaining member according to any one of claims 1 to 3, further comprising a rotation mechanism that rotates the housing relative to the pressing portion. In a retaining member insertion method of inserting a retaining member that can be locked to the outer peripheral surface of the fluid pipe into an accommodation groove formed in an annular housing that is mounted surrounding the fluid pipe.
A step of moving the pressure portion relatively up and down relative to the housing set up with the tube axis direction up and down, and placing a pressure head of the pressure portion inside the housing groove;
Temporarily placing a retaining member in the housing groove;
A method of inserting the retaining member, comprising: driving the pressing head in a radial direction of the fluid pipe, pressing the temporarily retained retaining member with the pressing head, and inserting the retaining member into the housing groove. .   The pedestal is inserted into the housing before the step of temporarily placing the retaining member, and the seat surface of the pedestal is disposed at the height of the inner wall surface on the back side of the receiving groove. Insertion method of retaining member.   The extraction according to claim 5 or 6, wherein when the pressing member presses the retaining member, the pressing portion abuts and supports the inner peripheral surface of the housing in a direction opposite to the driving direction of the pressing head. Insertion method of the stop member.

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