JP2009030670A - Expansion band expansion device for pipe inner surface repair joints - Google Patents

Abstract

An expansion band expanding device is provided that can expand the expansion band without using hydraulic means in an operating device as in a conventional device by utilizing a lever force generated by the rotation of a lever.
A roller having a through hole is pivotally supported and a lever having a claw plate at a lower end portion thereof, and a roller having a claw plate at a distal end portion and having a screw hole are pivotally supported. A push plate 23 whose end is pivotally supported by the lever 21, and a roller 34 pivotally supported by the push plate 23 through a through hole 30 of a roller 29 having a collar 39 and a nut means 40 and whose tip is pivotally supported by the lever 21. And a jack-up bolt 37 screwed into the screw hole 35.
[Selection] Figure 1

Description

  The present invention relates to an expansion band expanding device for expanding the diameter of an expansion band incorporated in a pipe inner surface repair joint.

  Generally, pipes used for agricultural water, industrial water, waterworks, etc. are arranged in a groove dug in the ground made of PC pipe or steel pipe, and the ends of adjacent pipes are pipe joints It is buried in the ground by connecting with and filling the groove dug in the ground with soil.

  In a pipe line buried in the ground, when the pipe body is displaced by vibration due to an earthquake or the like and the pipe joint part connecting the pipes is damaged, leakage may occur in the pipe joint part. If the pipe is large enough to allow the operator to enter the pipe joint when a leak occurs, the pipe enters the pipe and the pipe inner surface repair joint is attached to the leaked pipe joint. It is possible to stop the leakage of the pipe joint part by installing.

  As shown in FIG. 8, the pipe inner surface repair joint of the above type has a rubber ring 2 arranged so as to bridge the pipes 1 and 1 on the inner surfaces of the ends 1a and 1a of the pipes 1 and 1 to be connected. And the expansion bands 3 and 3 disposed on the inner surface of the rubber ring 2 so that the rubber ring 2 is fastened and fixed to the pipes 1 and 1.

  As shown in FIGS. 8 and 9, the expansion band 3 includes two semicircular segments 3a and 3b and an end portion of the opposite semicircular segment 3b projecting from the end portion 4 of the semicircular segment 3a. A locking claw portion 5a that is locked to 4; a locking claw portion 5b that is locked to the end portion 4 of the mating semicircular segment 3a that protrudes from the end portion 4 of the semicircular segment 3b; The opening 6 is formed on the end side of the circular segments 3a and 3b, and the spacer 7 is disposed between the end portions 4 and 4 of the semicircular segments 3a and 3b.

  The expansion band 3 loosely locks the locking claw 5a provided at the end 4 of the semicircular segment 3a to the end 4 of the semicircular segment 3b, and is provided at the end 4 of the semicircular segment 3b. The locking claw portion 5b is assembled by loosely locking the end portion 4 of the semicircular arc segment 3a. The assembled expansion band 3 is expanded in diameter by an expansion band expanding device 8 as shown in FIG.

  As shown in FIG. 10, the expansion band expanding device 8 is formed at a hydraulic cylinder 11 having a cylinder 9 and a piston 10, an operating part 12 fixed to the cylinder 9 of the hydraulic cylinder 11, and a lower end of the operating part 12. Engaging portion 12a, operating portion 13 fixed to the piston 10 of the hydraulic cylinder 11, engaging portion 13a formed at the lower end of the operating portion 13, and elastic means for connecting the operating portion 12 and the operating portion 13. 14 (Patent Document 1).

The expansion band expanding device 8 is engaged with the engagement portion 13a of the operating portion 13 fixed to the piston 10 in the opening 6 provided in the semicircular segment 3a of the assembled expansion band 3, and the semicircular segment 3b. The expansion part 3 is expanded in diameter by engaging the engaging part 12a of the operating part 12 fixed to the cylinder 9 in the opening 6 provided in the cylinder 9 and moving the piston 10 in the pushing direction. The expanded band 3 having an enlarged diameter is fastened and fixed to the rubber ring 2 by disposing a spacer 7 between the end 4 of the semicircular segment 3a and the end 4 of the semicircular segment 3b.
JP-A-2-295478

  Since the expansion band diameter expanding device uses a hydraulic cylinder as an operating device, there is a problem in that the direction of work is limited and there is a risk of oil leakage in the oil circuit of the hydraulic cylinder.

  An object of the present invention is to provide an expansion band expanding apparatus that can expand the expansion band without using hydraulic means as in the conventional apparatus by utilizing the lever force generated by the rotation of the lever. .

  The expansion band diameter expanding device according to the present invention pivotally supports a lever having a through hole and a nail plate at the lower end, and a roller having a nail plate at the distal end and a screw hole. A push plate with a shaft pivotally supported by a lever, and a jack-up bolt screwed into a screw hole of a roller pivotally supported by the push plate through a through hole of a roller pivotally supported by the lever with a collar and nut means It consists of.

According to the present invention, a large diameter expansion force for the expansion band can be obtained by a synergistic effect of a small amount of labor due to the lever rotation using the lever force and a thrust generated by the rotation of the jackup bolt.
Moreover, according to this invention, the diameter expansion force with respect to an expansion band can be controlled by confirming the rotational force of a jackup volt | bolt with tools, such as a torque wrench.

Hereinafter, an embodiment of an expansion band expanding apparatus according to the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the expansion band diameter increasing device 20 according to the present invention is based on a lever 21 having a substantially L shape, a claw plate 22 fixed to the lower end portion of the lever 21, and a longitudinal intermediate portion of the lever 21. It comprises a push plate 23 pivotally mounted in the vertical plane at its end, a claw plate 24 fixed to the tip of the push plate 23, and a jack-up bolt 25 connected to the push plate 23. The

  As shown in FIGS. 1 and 2, the lever 21 includes a pair of lever plates 26, 26, a spacer 27 disposed at the end of the long side portion 26 a of the lever plates 26, 26, and the length of the lever plate 26. It has a spacer 28 arranged at a connection portion between the side portion 26a and the short side portion 26b, and a roller 29 pivotally supported at an intermediate position between the long side portions 26a of the lever plates 26 and 26. The roller 29 is provided with a through hole 30 through which the jackup bolt 25 is passed.

  The claw plate 22 is disposed between the short side portions 26b of the lever plates 26, 26 so that the tip portion protrudes downward, and is fixed to the lever plates 26, 26 by bolts 31, 31. The shape of the engaging portion provided on the nail plate 22 corresponds to the shape of the engaging portion provided on the expansion band 50 (see FIG. 3) to be expanded in diameter.

  As shown in FIGS. 1 and 2, the push plate 23 has a pair of plate members 32, 32, a spacer 33 disposed between the pair of plate members 32, 32, and both ends of the pair of plate members 32, 32. And a pivoted roller 34. The roller 34 is provided with a screw hole 35 into which the tip of the jackup bolt 25 is screwed.

  The claw plate 24 is fixed between a pair of plate members 32, 32 so that the tip portion protrudes in the lateral direction. The push plate 23 is attached to the lever 21 so that a base end portion thereof can swing in a vertical plane by a pin 36.

  As shown in FIGS. 1 and 2, the jack-up bolt 25 includes a screw lot 37 whose tip is screwed into a screw hole 35 of the roller 34, and a screw lot 37 so that the screw lot 37 is fixed to the roller 34. And the nut 39 screwed to the screw lot 37 so that the collar 39 contacts the roller 29.

  An example of the expansion band 50 used for the pipe inner surface repair joint is shown in FIG. The expansion band 50 includes arc segments 51, 52, and 53 obtained by dividing a circle into three parts, a hinge coupling device 54 that couples the ends of the arc segment 51 and the arc segment 52, the arc segment 52, and the arc segment. 53, a hinge connecting device 55 for connecting the end portions of 53, an arc segment 51 located on the end side, and a ratchet connecting device 56 for connecting the end portions of the arc segment 53.

  As shown in FIG. 4, the hinge coupling device 54 includes a fitting plate 58 having a fitting portion 57 at the tip portion and a fitting plate receiving portion 60 having an opening 59 extending in the longitudinal direction on the upper surface. The fitting plate 58 is attached to the inner surface of the end of the arc segment 52 by welding means. The fitting plate receiving portion 60 is attached to the inner surface of the end portion of the arc-shaped segment 51 by welding means.

  Similarly, the hinge connecting device 55 includes a fitting plate 58 having a fitting portion 57 at the tip portion and a fitting plate receiving portion 60 having an opening 59 extending in the longitudinal direction on the upper surface. The fitting plate 58 is attached to the inner surface of the end of the arc segment 53 by welding means. The fitting plate receiving portion 60 is attached to the inner surface of the end portion of the arc-shaped segment 52 by welding means.

  As shown in FIG. 5, the ratchet coupling device 56 includes a ratchet plate 62 having a locking claw 61 at the distal end portion and a ratchet plate 64 having a plurality of receiving openings 63 spaced in the longitudinal direction. The ratchet plate 62 is disposed on the inner surface of the end of the arc segment 53. The ratchet plate 64 is disposed on the inner surface of the end of the arc-shaped segment 51.

  Receiving grooves 65 and 65 for receiving the claw plate 24 of the expansion band diameter increasing device 20 are formed at the end of the arc segment 53 opposite to the side on which the fitting plate 58 is provided. On the inner surface of the end portion of the arcuate segment 51 opposite to the side on which the fitting plate receiving portion 60 is provided, a locking portion 66 for locking the claw plate 22 of the expansion band diameter expanding device 20 is projected.

Next, the operation of the expansion band expanding apparatus according to the present invention will be described.
As shown in FIG. 3, the temporarily assembled expansion band 50 connects the arc segment 51 and the arc segment 52 by a hinge connecting device 54, and connects the arc segment 52 and the arc segment 53 by a hinge connecting device 55. The arcuate segment 51 and the arcuate segment 53 located on the end side are connected by a ratchet connecting device 56.

  The temporarily assembled expansion band 50 is arranged by an ordinary method on the inner surface of the rubber ring 12 shown in FIG. The temporarily assembled expansion band 50 is expanded in diameter from the position shown in FIG. 6 to the extended position shown in FIG.

  As shown in FIG. 6, the expansion band diameter increasing device 20 is hung on receiving grooves 65, 65 provided in an arc segment 53 of the expansion band 50 to expand the diameter of the claw plate 24 fixed to the push plate 23. The claw plate 22 fixed to the lever 21 is hooked on a locking portion 66 provided on the arc-shaped segment 51 of the expansion band 50.

  A nut provided on the screw rod 37 so that the claw plate 24 fixed to the pressing plate 23 is securely locked to the receiving grooves 65, 65 provided in the arc-shaped segment 53 of the expansion band 50 to be expanded. 38 is rotated so that the collar 39 provided on the screw rod 37 contacts the roller 34 provided on the push plate 23.

  The expansion band diameter increasing device 20 manually rotates the lever 21 from the position shown in FIG. 6 to the position shown in FIG. 7, and the nail plate 22 fixed to the lever 21 and the nail plate 24 fixed to the push plate 23. The arc-shaped segment 53 and the arc-shaped segment 51 of the expansion band 50 are moved in the direction of expanding the diameter.

  In conjunction with this, the nut 40 provided on the screw rod 37 is rotated by a tool such as a torque wrench, whereby the thrust generated by the rotation of the screw rod 37 is transmitted to the claw plate 24 fixed to the push plate 23.

  The expansion band diameter expanding device according to the present invention can stretch the expansion band on the inner surface of the rubber ring by expanding the diameter of the expansion band with a little effort of the lever using the lever force.

  Moreover, the expansion band diameter expansion apparatus by this invention can control the diameter expansion force of an expansion band by confirming the rotational force of a jackup volt | bolt with a torque wrench.

  Moreover, the expansion band diameter-expansion apparatus by this invention can exhibit a heavy load by incorporating a center hole type hydraulic cylinder in a thread part as needed.

It is a side view which deletes and shows one lever board of the expansion band diameter expansion apparatus of the pipe inner surface repair joint by this invention. It is a schematic elevation view of the expansion band diameter expansion apparatus of the pipe inner surface repair joint according to the present invention. It is a figure which shows an example of the expansion band of an inner surface repair joint. It is a figure which shows the hinge connection apparatus of the expansion band shown in FIG. It is a figure which shows the ratchet coupling device of the expansion band shown in FIG. It is a figure which shows the state attached to the expansion band which is going to expand the expansion band diameter expansion apparatus of the pipe inner surface repair joint by this invention. It is a figure which shows the state which the expansion band expanded the expansion band diameter expansion apparatus of the pipe inner surface repair joint by this invention. . It is sectional drawing which shows the conventional inner surface repair joint. It is a figure which shows the connection part of the expansion band of the conventional internal surface repair joint. It is a figure which shows the expansion band diameter expansion apparatus of the conventional pipe inner surface repair joint.

Explanation of symbols

20 Expansion band diameter expansion device 21 Lever 22 Claw plate 23 Push plate 24 Claw plate 25 Jack up bolt 29 Roller 34 Roller 19 Collar 40 Nut 50 Expansion band

Claims (3)

  A lever pivotally supporting a roller provided with a through hole and having a claw plate at the lower end; a push plate pivotally supporting a roller having a claw plate at the tip and having a screw hole and pivotally supporting the base end on the lever; A jack-up bolt having a collar and a nut means and having a tip portion screwed through a through hole of a roller pivotally supported by the lever and screwed into a screw hole of the roller pivotally supported by the pressing plate. An expansion band expanding device for a pipe inner surface repair joint characterized in that the expansion band whose both ends are locked to a claw plate provided on a lever and a claw plate provided on a push plate is expanded.   The expansion band diameter increasing device for a pipe inner surface repair joint according to claim 1, wherein the jackup bolt applies a thrust generated by rotation of the nut means to a claw plate provided on the push plate.   3. The expansion of a pipe inner surface repair joint according to claim 1, wherein the jack-up bolt has a fixing nut screwed so as to abut on a flat portion provided on a roller pivotally supported by the push plate. Band diameter expansion device.

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