JP5484266B2 - 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 insertion device for the retaining member, a fixing base having a receiving surface that rises in the vertical direction and receives the housing from the tube axis direction, and a support that protrudes from the receiving surface and supports the housing from the inside, and the fixing base And a head driving mechanism for driving the pressing head toward the housing groove.

  In the retaining member insertion device according to the present invention, the housing is stably set on the fixed base by being supported from the inside by the support portion while being received from the tube axis direction by the receiving surface. Then, by driving the pressing head toward the receiving groove by the head driving mechanism, the retaining member can be inserted into the receiving groove with high accuracy and efficiency. Moreover, since the working efficiency when inserting the retaining member can be increased by using the head driving mechanism, it is also suitable for mass production.

  In the retaining member insertion device of the present invention, it is preferable that the receiving surface is inclined upward with respect to the vertical direction. According to such a configuration, the housing set on the fixed base can be prevented from falling off and the posture can be stabilized, which is advantageous in accurately inserting the retaining member into the receiving groove.

  In the retaining member insertion device according to the present invention, it is preferable that the support portion rotatably supports the housing. According to such a configuration, the housing can be rotated in a state where it is set on the fixed base. Therefore, while keeping the circumferential position of the housing with respect to the pressing head, the retaining member is pressed one after another toward the receiving groove by a simple operation to remove the housing. The stop 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, a step of receiving the housing from the tube axis direction with a receiving surface formed upright in the vertical direction, and supporting the housing from the inside with a support portion protruding from the receiving surface; Temporarily placing the retaining member on the housing, driving the pressing head facing the housing groove toward the housing groove, and pressing the temporarily placed retaining member with the pressing head to insert the retaining head into the housing groove And a process.

  In the method for inserting the retaining member according to the present invention, the housing is supported from the inner side by the support portion while being received from the tube shaft direction on the receiving surface, and is then temporarily placed by driving the pressing head toward the receiving groove. Since the retaining member can be pressed, the retaining member can be inserted into the receiving groove with high accuracy and efficiency. Moreover, since the working efficiency when inserting the retaining member can be increased, it is also suitable for mass production.

  In the method for inserting the retaining member of the present invention, it is preferable that the driving direction of the pressing head is downward. In this case, since the retaining member is pressed downward by the pressing head, it is easy to stabilize the temporary placement of the retaining member, and the retaining member can be inserted into the housing groove with higher accuracy.

  In the method for inserting the retaining member according to the present invention, in the step of temporarily placing the retaining member, the retaining member is temporarily placed at a location different from the location pressed by the pressing head, and then the housing is rotated. What moves the said retaining member to the press location by the said press head is preferable. According to such a method, the temporary placement work of the retaining member is facilitated, and the retaining member can be pressed one after another by a simple operation, so that the retaining member can be inserted more efficiently.

Longitudinal sectional view of the pipe joint (AA sectional view of FIG. 2) Front view of press ring Development view of the pusher wheel when viewed from the inner periphery (A) BB sectional view and (b) CC sectional view of the retaining member shown in FIG. Front view of insertion device Longitudinal section in side view of the insertion device Front view of the pusher wheel set on the fixed base Front view of the pusher wheel set on the fixed base Longitudinal sectional view of the press ring set on the fixed base Longitudinal sectional view showing how the retaining member is inserted into the receiving groove Longitudinal cross section showing how multiple press wheels are set Longitudinal sectional view showing how the receiving part of the fluid pipe is set

  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 sealing material 3 is pressed from the tube axis direction by a pusher wheel 10 fitted on the fluid pipe P2. Bolt insertion holes 10a are formed in the press wheel 10 at a plurality of locations in the circumferential direction (six locations in the present embodiment) (see FIG. 6), and bolts constituting the fastener 15 are inserted into each of them. Each bolt is inserted into a bolt insertion hole (not shown) formed in the flange 1 a of the receiving portion 1, and a nut is fastened, and the press ring 10 and the receiving portion 1 are connected via a fastener 15. Has been.

  The push ring 10 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 is arranged in the pipe circumferential direction. A plurality of (six in this embodiment) retaining members 6 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 housing groove 4 of the push ring 10 as a housing and an insertion method thereof will be described. 1, 7 </ b> B, 8, 9, and 10, the retaining member 6 is depicted in a side view as viewed from the circumferential direction.

  As shown in FIGS. 5A and 5B, the insertion device 5 accommodates the fixing base 51 on which the pusher wheel 10 is set, the pressing head 52 facing the receiving groove 4 of the pressing wheel 10 set on the fixing base 51, and the pressing head 52. And an air cylinder 53 that is driven toward the groove 4. That is, in the present embodiment, the head driving mechanism is constituted by the air cylinder 53. The fixed base 51 includes a receiving surface 54 that rises in the vertical direction and receives the push wheel 10 from the tube axis direction, and a support portion 55 that protrudes from the receiving surface 54 and supports the push wheel 10 from the inside.

  The fixed base 51 and the air cylinder 53 are respectively fixed to the base 56, and a swing arm 57 is pivotally supported on the drive rod 53 a of the air cylinder 53. The air cylinder 53 is located on the back side of the fixed base 51, and the pressing head 52 attached to the tip of the swing arm 57 is disposed in the window hole 51a so as to protrude to the front side (receiving surface 54 side). . With such a configuration, there is no extra obstacle on the front side of the fixed base 51, so that the work for attaching and detaching the push wheel 10 to the fixed base 51 can be simplified.

  A plurality of (four pairs in this embodiment) mounting holes 51b having different heights and intervals are formed in the fixed base 51, and the support portions 55 are attached to a pair of them. By changing the attachment hole 51b to which the support portion 55 is attached, various calibers of the push wheel 10 can be handled. As shown in FIG. 6, the outer diameter of the support portion 55 is sufficiently smaller than the inner diameter of the pusher wheel 10, and the pusher wheel 10 set on the fixed base 51 is hung on the supporter 55. In this embodiment, although the support part 55 is supporting the press wheel 10 in two places, it is not limited to this.

  When inserting the retaining member 6 into the receiving groove 4, first, as shown in FIG. 6, the pusher wheel 10 not including the retaining member 6 is set on the fixing base 51, and the pressing head 52 is inserted into the receiving groove 4. Make them face each other. At this time, the pusher wheel 10 is received from the tube axis direction by the receiving surface 54 (see FIG. 7B), and the pusher wheel 10 is supported from the inside by the support portion 55. In the present embodiment, as shown in FIG. 5B, the receiving surface 54 is inclined upward with respect to the vertical direction, so that the set push wheel 10 is easily stabilized. The driving direction of the pressing head 52 is downward, and the lower portion of the pressing head 52 is a pressing portion.

  Subsequently, the retaining member 6 is temporarily placed in the receiving groove 4 as shown in FIG. 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. Although the retaining member 6 may be temporarily placed below the pressing head 52 from the beginning, that is, at a pressing position by the pressing head 52, in the present embodiment, the pressing position by the pressing head 52 is improved in order to improve workability. Are temporarily placed at different locations, and then the pusher wheel 10 is rotated as shown in FIG. 7A to move the retaining member 6 to the location pressed by the pressing head 52.

  The support portion 55 rotatably supports the pusher wheel 10 so that the pusher wheel 10 set on the fixed base 51 can be easily rotated. As shown in FIG. 7B, the support portion 55 is composed of a roller having a shaft portion 55a inserted through the mounting hole 51b and a cylindrical portion 55b rotatably inserted into the shaft portion 55a. With this configuration, as will be described later, while keeping the circumferential position of the push wheel 10 with respect to the pressing head 52, the retaining member 6 is pressed one after another toward the receiving groove 4 by a simple operation, and the retaining member 6 is efficiently Can be inserted.

  Subsequently, the drive rod 53a of the air cylinder 53 is lowered, and the pressing head 52 is driven downward toward the receiving groove 4 as shown in FIG. And inserted 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 52 presses against the inner peripheral surface of the retaining member 6 from the inside in the radial direction. Therefore, it is preferable to attach a cushioning material such as rubber to the pressing head 52 so as not to damage the claw 8 of the retaining member 6. Further, in the present embodiment, the tip shape of the pressing head 52 is formed thin, and in order to prevent damage to the claw 8 of the retaining member 6, a portion other than the claw 8 (between the two claws 8 in the illustrated example). Is configured to be pressable.

  In the present embodiment, the pressing head 52 protrudes on both sides in the circumferential direction as shown in FIG. 7A so as not to press the retaining member 6 toward one side in the circumferential direction, and two locations of the retaining member 6 in the circumferential direction are provided. I try to press it. However, the present invention is not limited to this, and, for example, in order to suppress the inclination of the retaining member 6 in the tube axis direction, it may be possible to press three places that are the apexes of the triangle including the above two places. .

  When the retaining member 6 is inserted into the receiving groove 4, the new retaining member 6 is temporarily placed as described above, the push wheel 10 is rotated, the retaining member 6 is moved to a location where the pressing head 52 is pressed, and again. The pressing head 52 is driven to insert the retaining member 6. By such a simple operation, the retaining members 6 can be pressed one after another and efficiently inserted into the receiving groove 4. Since the six retaining members 6 are built in the present embodiment, all the insertion operations are completed by repeating this operation six times.

  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 pusher wheel 10 is removed from the fixed base 51 and the push bolts 7 are attached to the outer peripheral side of each retaining member 6 so that the fluid pipes as shown in FIGS. It can be used for the movement prevention apparatus.

  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 an air cylinder is employed as the actuator of the head driving mechanism has been described. However, the present invention is not limited to this, and any actuator that can drive a pressing head, such as a linear motor or a voice coil motor, is used. It is possible to apply without particular limitation.

  In another embodiment shown in FIG. 9, a plurality of (three in this example) push wheels 10 stacked in the tube axis direction are set on the fixed base 51. The pressing head 52 and the support portion 55 are provided so as to extend in the tube axis direction, and the retaining member 6 can be simultaneously inserted into the receiving groove 4 of each pusher wheel 10 by driving the pressing head 52. Each pusher wheel 10 has a uniform posture in the circumferential direction by positioning pins (not shown) inserted through the bolt insertion holes 10a. In this insertion device, the swing arm 57 is bent, and the pressing head 52 is driven downward as the drive rod 53a is raised.

  In the above-described embodiment, an example in which the push wheel is a housing has been shown. However, the present invention is not limited to this, and an annular receiving portion of a fluid pipe may be a housing. The receiving portion is mounted so as to surround the fluid pipe having the insertion portion, and the retaining member is housed in the housing groove formed on the inner peripheral side thereof to constitute a fluid pipe movement prevention device. As other structures of the receiving portion, known structures in this technical field can be used without limitation.

  In FIG. 10, the receiving portion 9 as a housing is set on the fixed base 51. The retaining member 6 is temporarily placed in the receiving groove 14 of the receiving portion 9, and the retaining member 6 can be pressed and inserted into the receiving groove 14 by driving the pressing head 52 as described above. The window hole 51 a is formed to be relatively large so that the retaining member 6 can be temporarily placed from the back side of the fixed base 51. It is preferable that the support part 55 and the support body 59 are comprised with a roller, a rail, etc., and the receiving part 9 is supported rotatably.

  In the present invention, a reinforcing metal fitting (e.g., Japanese Patent Application Laid-Open No. Hei 10) that is mounted so as to surround the insertion portion of the pipe joint and that engages with the flange of the receiving portion when a force is applied to pull out the insertion portion from the receiving portion. No. 10-122466) or a non-average force support device (see, for example, Japanese Patent Application Laid-Open No. 2002-243066) that surrounds a fluid pipe and is mounted. 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. Further, although the push wheel 10 as the housing described above is provided with the push bolt 7 that presses the retaining member 6 toward the insertion portion 2, the present invention is not limited thereto, and the diameter of the housing and the outer periphery of the housing groove are not limited thereto. You may make it press by the wedge effect in a wall.

DESCRIPTION OF SYMBOLS 1 Receiving part 2 Inserting part 4 Housing groove 5 Insertion device 6 Detachment member 8 Claw 9 Receiving part (an example of housing)
10 Press wheel (example of housing)
11 Movement Restricting Member 12 Holding Member 51 Fixing Base 51a Window Hole 52 Pressing Head 53 Air Cylinder (Head Drive Mechanism)
54 Receiving surface 55 Supporting portion 57 Swing arm P1 Fluid pipe P2 Fluid pipe

Claims (6)

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 fixing base having a receiving surface that rises in the vertical direction and receives the housing from the tube axis direction, and a support that protrudes from the receiving surface and supports the housing from the inside;
A pressing head facing the housing groove of the housing set on the fixed base;
And a head driving mechanism for driving the pressing head toward the receiving groove.   2. The retaining member insertion device according to claim 1, wherein the receiving surface is inclined upward with respect to a vertical direction.   The retaining member insertion device according to claim 1, wherein the support portion rotatably supports the housing. 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.
Receiving the housing from the tube axis direction with a receiving surface formed in a vertical direction, and supporting the housing from the inside with a support portion protruding from the receiving surface;
Temporarily placing a retaining member in the housing groove;
And a step of driving the pressing head opposed to the receiving groove toward the receiving groove and pressing the temporarily placed retaining member with the pressing head and inserting the pressing head into the receiving groove. Insertion method of the stop member.   The method for inserting a retaining member according to claim 4, wherein the driving direction of the pressing head is downward. In the step of temporarily placing the retaining member, the retaining member is temporarily placed at a location different from the location pressed by the pressing head, and then the housing is rotated so that the retaining member is pressed by the pressing head. The method for inserting a retaining member according to claim 4 or 5, wherein the retaining member is moved to a position.

Images