JP4440592B2 - Cylindrical elastic body fixing member - Google Patents

Description

  The present invention relates to a fixing technique for fixing a cylindrical elastic body used for repairing a pipe wall of a pipe such as a concrete pipe or a pipe joint from an inner peripheral side of the cylindrical elastic body.

  When cracks occur in concrete pipes buried for piping, etc., if the cracks are large, the concrete pipes are replaced. However, the work of excavating and replacing the concrete pipe once buried is an extremely large work. Therefore, depending on the degree of cracking, techniques have been developed that can deal with concrete pipes without replacement.

  As one of such techniques, a method is known in which a cylindrical elastic body is pressed and sealed from the inside of the concrete pipe so as to close the cracked portion of the concrete pipe from the inside.

  In order to press-contact the cylindrical elastic body to the inner periphery of the concrete pipe, the outer peripheral side of the half-ring body formed in a semi-ring shape by providing a cut-off portion in a part of the ring is connected to the inner peripheral side of the cylindrical elastic body This is performed by enlarging the circumferential length of the half ring body in a state of being in pressure contact.

  For fixing such a cylindrical elastic body, conventionally, a cylindrical elastic body fixing member 1 having a variable circumference as shown in FIG. 11A is used. That is, as shown in FIG. 11B, the cylindrical elastic body fixing member 1 configured in the non-closed half ring body 1a has a frame 3 having a predetermined length interposed between the ring ends 2a and 2b. Therefore, the circumference is variable. If the length of the interposing frame 3 is appropriately selected, the peripheral length can be adjusted to the required required length.

  On the ring end 2b side, a guide 4 formed in a substantially cylindrical shape is provided, and a piece 3 is interposed between the projection 5 provided on the ring end 2b and the ring end 2a. 4 is configured to be covered.

  In the prior art described above, in order to adjust the degree of expansion of the circumferential length depending on the length of the frame interposed between the ring ends, a cylinder having various inner diameters unless various frames having different dimensions are prepared in advance. It cannot respond appropriately to the attachment work of the elastic body.

  In addition, since the frame is not integrated with the half ring body, if an unexpected force such as a twisting direction is applied to an intervening portion of the frame for some reason, the frame may be detached. In the conventional configuration shown in FIG. 11, when the top is removed, the half ring body no longer has the function of pressing the cylindrical elastic body from the inner peripheral surface side, and the concrete pipe that has been suppressed until then is lost. There is a risk that the cracked portion will collapse at once, or the groundwater may enter at once through the crack.

  There is a risk that collapse and inundation at the cracked portion of the buried Conchung Reit pipe will lead to serious accidents such as the disruption of the lifeline that supports the urban functions, and there is a need for technology that does not cause such unforeseen circumstances.

  In the conventional configuration, the half ring body, the top, and the like are configured separately, and the cylindrical elastic body fixing member is used by assembling such separate components on site. If the separate parts are assembled in advance without performing on-site assembly, the joint strength at the joint can be increased as compared to the on-site assembly, and the occurrence of obstacles such as off-frames is reduced. It is considered possible.

  However, since a considerable load is always applied to the joining portion between the frame and the ring end in use, it is necessary to introduce a certain joining technique to ensure the joining strength. The introduction of such a joining technique naturally increases the production cost, and the product price cannot be set low. According to the estimation of the present inventor, it was confirmed that when such a configuration is adopted, the price resistance against the current product is inferior. Thus, there is a demand for development of a product that performs its function reliably and inexpensively.

  An object of the present invention is to securely fix a cylindrical elastic body that seals between the circular inner peripheral portion and the outer peripheral portion by pressing the outer peripheral portion of the cylindrical elastic body against a circular inner peripheral portion such as a concrete pipe. It is to provide technology to do.

  In the present invention, unlike the conventional components, a configuration in which the circumference is variable without interposing a frame at the ring end is prevented from causing any malfunction due to a frame disengagement. In addition, by promoting the integration of components, that is, by creating all functional parts necessary for expanding the circumference from one material through integrated processing such as bending, it is possible to incorporate other parts, weld joints, No separate parts such as rivets or screws were joined, and the occurrence of malfunctions due to poor joints was completely eliminated.

  In addition, by promoting such integration, the troublesome work involved in assembling separate parts during field work is eliminated, and the work can be performed more easily and in a short time. Occurrence was suppressed.

  In addition, by performing such integrated processing, the joining work at the product creation stage is omitted, the manufacturing work is simplified, the production cost is reduced, and the price is sufficiently competitive with the current product. Achieved product creation.

  In addition, a new mounting jig has been devised so that the mounting operation of the cylindrical elastic body fixing member can be performed smoothly and easily.

That is, the present invention provides a cylindrical elastic body that presses an outer peripheral portion against a circular inner peripheral portion and seals between the circular inner peripheral portion and the outer peripheral portion, and the cylindrical elastic portion on the circular inner peripheral portion. A cylindrical elastic body fixing member that is fixed by press-contacting the outer peripheral side of the peripheral length to the inner peripheral side of the body, and is configured as a non-closed annular half-ring body by a long material , The long material is formed by bending both long sides facing each other to the inner peripheral side, and a guide portion for fitting the one ring end and the other ring end to each other; and processing the long material It is formed, and perforated a stopper portion for maintaining a fitting state of both ring ends, the entire width, including the guide portion of the one ring end of the half-ring body in the other ring end guide portion Is formed to be smaller than the inner plate surface width, and one ring end side is the other ring end side. Characterized in that it fitted in enclosed state.

In the cylindrical elastic body fixing member having such a configuration, a tongue-shaped outer peripheral guide portion that is not provided with the guide portion is integrally provided on the other ring end side in which one ring end side is fitted in the inclusion state. It is characterized by being. In the cylindrical elastic body fixing member having any one of these configurations, the stopper portion abuts a tapered surface provided at a tip portion on one ring end side by bending a cut portion provided in the long material. It is formed in the part.

In the cylindrical elastic body fixing member having any one of the structures described above , jig locking portions for attachment jigs are respectively provided on one ring end side and the other ring end side of the half ring body. It is characterized by being.

  The present invention is a mounting jig used for a cylindrical elastic body fixing member having such a configuration, wherein a screw provided with threaded portions reversed in the threading direction is provided on the left and right sides, and screwed into the left and right threaded portions. And a locking portion provided on the nut and detachably locked with the jig locking portion provided on the ring end side of the cylindrical elastic body fixing member. Alternatively, nuts provided on the left and right with threaded portions with the threading direction reversed, bolts to be screwed into the left and right threaded portions of the nuts, and provided on the bolts, the tubular elastic body fixing member It may have a configuration characterized by having a locking portion that is detachably locked to the jig locking portion provided on the ring end side.

  As used herein, the term “half ring” means a shape in which a part of a closed ring with a closed ring is cut off to form a non-closed ring.

  The term “circular inner periphery” means that the inner periphery of a cylindrical body such as a concrete tube or a manhole tube, the inner periphery of a circular opening such as a circular hole opened in a wall such as a tube wall, etc. It means the inner peripheral part.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  In the cylindrical elastic body fixing member of the present invention, the functional part necessary for varying the circumferential length is formed by integral processing from a single material, so when various parts are joined by welding or the like to constitute the functional part In comparison, it is possible to completely prevent the occurrence of a failure due to a bonding failure or the like.

  By using the mounting jig of the present invention, the circumferential length of the cylindrical elastic body fixing member can be easily changed, and the cylindrical elastic body fixing member can be smoothly attached to the inside of the cylindrical elastic body.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1)
In the present embodiment, a cylindrical elastic body fixing member according to the present invention will be described. The cylindrical elastic body fixing member of the present invention is configured as a half ring body whose outer peripheral length can be varied. Therefore, the outer peripheral portion of the cylindrical elastic body is pressed against the inner peripheral portion (circular inner peripheral portion) of a cylindrical body such as a concrete pipe, and the circular inner peripheral portion and the outer peripheral portion of the cylindrical elastic body. When sealing between, the cylindrical elastic body is fixed to the inner circumferential surface of the cylindrical body by pressing the outer peripheral side of the half ring body with the enlarged peripheral length to the inner peripheral side of the cylindrical elastic body. be able to.

  FIG. 1A shows a plan view of a material shape used for integrally forming a cylindrical elastic body fixing member, FIG. 1B shows an end surface of FIG. 1A, and FIG. (D) shows a side situation where the guide part is bent from (A), (E) shows a situation of the outer peripheral guide part provided at the ring end, (F) Shows the material shape in consideration of the outer periphery guide portion from the beginning.

  FIG. 2A is a side view showing a semi-ring shape of the cylindrical elastic body fixing member, and FIG. 2B is a cross-sectional view taken along line AA in FIG. FIG. 3A is a partial perspective view showing a state in which the taper portion at the ring end is fixed by the stopper portion, and FIG. 3B is a partial cross-sectional view taken along line AA of the stopper portion in FIG. FIG. 4 is a partial perspective view showing a modified example in which a plurality of tapered portions are provided.

  As shown in FIG. 1 (A), the cylindrical elastic body fixing member 10 of the present invention is integrally formed from a single plate-like material 11 using bending or the like. That is, no joining such as welding is used.

  As shown in FIG. 1A, the plate-like material 11 is formed in a so-called long material 11a having a band shape. As shown in FIG. 1B, the long material 11a is formed in a rectangular plate shape having a uniform thickness. The opposite long sides of the long material 11a are bent at a substantially right angle with respect to the plate surface S of the long member 11a along the fold line a indicated by a broken line in FIG. Is formed. As shown in FIGS. 1A and 1C, the folding line a has a full width W1 side 13 including both guide portions 12 on one end side in the folded state, and the plate surface width of the plate surface S on the other end side. It is set to be shorter by α than the W2 side 14.

  The guide part 12 formed by bending the opposing long sides of the long material 11a along the fold line a in this way is shown in FIGS. As shown in FIG. 1D, the guide portion 12 is bent with the full width W1 side 13 higher than the plate width W2 side 14.

  Note that α is a semi-ring shape of the long material 11a as shown in FIG. 2A, and the ring ends 13a and 14a corresponding to both ends thereof are overlapped by sliding the guide portions 12 together. Necessary gaps (backlash) given to the left and right are shown so that they can be fitted.

  That is, the full width W1 side 13 and the plate surface width W2 side 14 both correspond to the respective short sides of the long material 11a formed in a semi-ring shape as shown in FIG. The end 13a, 14a is configured, and the full width W1 side 13 corresponding to the ring end 13a is set to be smaller than the plate surface width W2 side 14 corresponding to the ring end 14a. Thus, the ring end 13a side is fitted so as to be included in the ring end 14a side.

Both ring ends 13a and 14a are fitted in a spiral state as shown in FIG. In such a fitting state, when the plate thickness of the long material 11A is t between the radius r ₁ on the ring end 14a side and the radius r ₂ on the ring end 13a side constituting the half ring body 10a. Satisfies the relationship r ₂ ≈r ₁ −t.

  In the half ring body 10a formed by bending the long material 11a into a ring shape as described above, the guide portion 12 is positioned on the inner peripheral side as shown in FIG. The outer peripheral side, which is the back side of the plate surface S, is the side that is pressed against the inner peripheral side of a cylindrical elastic body to be described later.

  In addition, on the plate surface width W2 side 14, the formed guide portion 12 is cut away toward the end portion, for example, as shown in FIG. 1E, and the plate surface S is just extended in a tongue shape. It is formed on the outer peripheral guide portion 15 having a simple shape. As shown in FIG. 2 (A), the outer circumferential guide portion 15 guides the outer circumferential side on the ring end 13a side when the ring ends 13a and 14a are fitted, and serves as a guide to the ring end 14a side. Will be fulfilled. By providing the outer peripheral guide portion 15, the operation of bringing the ring ends 13 a and 14 a into a fitted state is significantly easier than in a configuration in which the outer peripheral guide portion 15 is not provided.

  That is, in the half ring body 10a made of the long material 11a bent in a half ring shape, the ring ends 13a and 14a are in a state of being easily splashed outward in a direction away from each other, and the ring ends 13a and 14a are not splashed. The ring end 13a is piled inside the ring end 14a in the pressed state, and the ring end 13a side is inserted into the ring end 14a side while maintaining the state. It is not easy to do.

  However, if there is such an outer peripheral guide portion 15, if the ring end 13a side is once pressed and the outer peripheral side of the ring end 13a is brought into contact with the inner side of the outer peripheral guide portion 15, the ring end 13a side will spring outward. Since there is no worry, the operation of inserting the ring end 13 a side into the ring end 14 a side is facilitated by sliding the ring end 13 a along the outer peripheral guide portion 15. It is much easier to adjust the fitting state by adjusting the amount of insertion.

  The outer peripheral guide portion 15 can be formed by a method of excising the guide portion 12 once formed as described above. However, for example, as shown in FIG. 1 (F), the outer periphery guide portion 15 is formed in advance by providing a notch 16 on the full width W1 side 13 of the long material 11a from the beginning. The guide part 12 formed by bending the long side to be applied may be configured not to be applied to the outer peripheral guide part 15.

FIG. 2B shows a state in which the ring end 13a is fitted in the state of being included in the ring end 14a in this way. FIG. 2B shows a state in which the full width W1 side 13 is narrow and the plate surface width W2 side 14 is wide and is fitted with the difference α. If the guide portion 12 on the ring end 13a side is the inner guide portion 12a and the guide portion 12 on the ring end 14a side is the outer guide portion 12b, the inner guide 12a has a gap (back) d (= d ₁ + d ₂ ). Thus, the outer guide 12b is fitted. The size of the gap d is equal to α at the maximum. The value of α may be determined according to the required variable amount of the inner diameter of the ring, the plate thickness, and the outer peripheral length of the half ring body 10a.

  The fitting state of the ring ends 13a and 14a is maintained by the stopper portion 20 provided on the plate surface S of the long material 11a. As shown in FIGS. 3 (A) and 3 (B), the stopper portion 20 is provided with a cut on the center side of the plate surface S of the long material 11a, and the cut portion is bent upward by pressing or the like. It is formed. In the figure, a state in which the bent portion 20a is formed from the long material 11a by integral processing is shown. The back side of the bent portion 20a is an abutting portion 21 that abuts the surface of the tapered portion 13b provided at the ring end 13a.

In such a configuration, as shown in FIG. 3B, the taper portion 13b of the ring end 13a has an angle θ ₁ formed between the taper surface and the tangential direction of the outer peripheral surface of the ring end 13a of 20 ° or more and 80 ° or less. Is set to On the other hand, as shown in FIG. 3B, the angle θ ₂ formed with the tangential direction of the outer peripheral surface on the ring end 14a side is 20 in the contact portion 21 where the tapered surface of the tapered portion 13b of the ring end 13a contacts. It is set to at least 80 ° and at most 80 °.

If both the angles θ ₁ and θ ₂ indicating the taper of the contact portion 21 and the ring end 13a are set to the same angle within the above angle range, it is preferable that the contact surfaces are in close contact with each other. If both angles θ ₁ and θ ₂ are set in this way, even if a force acts in a direction in which the circumferential length of the half ring body 10a is reduced in the fitted state of the ring ends 13a and 14a, the ring end 13a The tapered portion 13b slides so as to bite along the contact portion 21, and the ring end 13a does not move in a direction away from the contact portion 21. Therefore, there is no fear that the cylindrical elastic body is detached due to the circumferential length of the half ring body 10a constituting the cylindrical elastic body fixing member 10 being reduced more than necessary while the cylindrical elastic body is fixed.

The reason why θ ₁ and θ ₂ are set to 20 ° or more and 80 ° or less is that from the point of view of safety, if the tip angle is less than 20 °, the tip becomes knife-shaped and there is a risk of injury during work. . On the other hand, if the angle exceeds 80 °, the risk of the inner ring end 13a jumping off will increase, so it was set to 80 ° or less.

  In the configuration shown in FIG. 4, the case where a plurality of tapered portions 13 b that can contact the contact portion 21 of the stopper portion 20 is configured on the ring end 13 a side is shown. On the ring end 13a side, an opening 17 having a size that allows the bent portion 20a of the stopper portion 20 to enter is formed. When the ring ends 13a and 14a are fitted, the side corresponding to the contact portion 21 is formed in the tapered portion 13b as described above in a state where the bent portion 20a is put in the opening portion 17.

  In this way, by providing a plurality of tapered portions 13b that can come into contact with the contact portion 21 of the bent portion 20a constituting the stopper portion 20, a plurality of fitting states of the ring ends 13a and 14a can be set. The cylindrical elastic body fixing member 10 can correspond to a plurality of types of cylindrical elastic bodies having different inner diameters.

  Although not shown in the drawing, the tapered portion 13b provided on the end surface of the ring end 13a by providing the stopper portion 20 having the configuration shown in FIG. 3A at a plurality of locations on the plate surface S of the long material 11a. A plurality of fitting states of the ring ends 13a and 14a may be set by using. Or you may enable it to perform a fine adjustment of a fitting state more by providing the stopper part 20 and the taper part 13b in multiple places, respectively.

  As described above, the cylindrical elastic body fixing member 10 according to the present invention having the above configuration includes a cylindrical elastic body placed in a cylindrical body on the inner peripheral portion of the cylindrical body that needs to be sealed. It is a member for fixing the outer peripheral portion so that the inner peripheral portion can be sealed by being brought into pressure contact with the peripheral portion of the cylindrical body.

  For example, as shown in FIG. 5A, if a concrete pipe 40a is assumed as the cylindrical body 40, in order to prevent water leakage due to cracks 42 generated on the pipe wall 41, the inner circumferential surface of the concrete pipe 40a The cylindrical elastic body fixing member 10 of the present invention can be used when the outer peripheral surface of the cylindrical elastic body 50 is brought into pressure contact to seal the inner peripheral surface.

  Incidentally, in the configuration shown in FIG. 5A, the inner peripheral portion of the concrete pipe 40a as the cylindrical body 40 corresponds to a circular inner peripheral portion.

  The cylindrical elastic body fixing member 10 according to the present invention is placed inside the cylindrical elastic body 50 placed in the concrete pipe 40a (40). In this state, the fitting state of the ring ends 13a and 14a of the half ring body 10a of the cylindrical elastic body fixing member 10 is adjusted to adjust the outer peripheral length of the cylindrical elastic body fixing member 10 formed in the half ring body 10a. To do.

  The adjustment of the fitting state of the ring ends 13a and 14a is performed by pressing the outer peripheral side of the cylindrical elastic body fixing member 10 against the inner peripheral side of the cylindrical elastic body 50, and the outer peripheral portion of the cylindrical elastic body 50 of the concrete pipe 40a. This is performed until the peripheral length expands to a length that can sufficiently seal the inner peripheral portion.

  In this manner, the ring ends 13a and 14a are fitted until the outer peripheral length of the cylindrical elastic body fixing member 10 is adjusted to an appropriate length and the sealing function of the cylindrical elastic body 50 can be exhibited. What is necessary is just to fix and maintain a fitting state with the stopper part 20. FIG.

  FIG. 5B shows a case where the cylindrical elastic body 50 formed in the elastic joint 50a is used for joining the circular opening 44 of the side wall 43 of the structure requiring water stop and the pipe 45. The case where the shape elastic fixing member 10 is applied is shown.

  That is, the outer peripheral portion of the large-diameter portion 51 of the elastic joint 50 a is brought into contact with the circular inner peripheral portion 44 a of the circular opening 44. The outer peripheral portion of the large-diameter portion 51 is brought into pressure contact with the circular inner peripheral portion 44a side, and sealing is performed between the outer peripheral side of the large-diameter portion 51 and the circular inner peripheral portion 44a. The cylindrical elastic body fixing member 10 is fitted in a groove portion 52 provided on the inner peripheral side of the large diameter portion 51.

  The fitting of the ring ends 13a and 14a of the half ring body 10a constituting the cylindrical elastic body fixing member 10 is adjusted in the state where the cylindrical elastic body fixing member 10 is fitted in the groove 52, and the outer peripheral length of the cylindrical elastic body fixing member 10 is large. The outer periphery of the portion 51 is enlarged so as to be in pressure contact with the circular inner periphery 44a. The fitting state of the ring ends 13 a and 14 a is fixed and maintained by the stopper portion 20.

  On the other hand, since the pipe 45 is connected to the small-diameter portion 53 side of the elastic joint 50a, the structure requiring water stoppage by connecting the large-diameter portion 51 side of the elastic joint 50a to the circular opening 44 as described above. The small-diameter pipe 45 can be joined to the circular opening 44 provided in the side wall 43 so that the water can be stopped.

  As described above, the usage example of the cylindrical elastic body fixing member 10 of the present invention has been described by taking the case shown in FIGS. 5A and 5B as an example, but the application example of the present invention is limited to such an example. However, the present invention can be widely applied when fixing the cylindrical elastic body in the structure part in which the outer peripheral part of the cylindrical elastic body is pressed against the circular inner peripheral part.

  Further, in the above description, the half ring body 10a having the above configuration uses a rectangular long material 11a as shown in FIG. 1A, and the full width W1 side 13 is narrower than the plate width W2 side 14. Although the case where the guide part 12 is formed by bending so as to be described as an example, the long material 11a is formed in a trapezoidal shape as shown in FIG. It can be formed by bending with the same width. 6 (B) shows the end face as viewed from the wide side of FIG. 6 (A), (C) shows a planar state where the guide portion is bent from (A), and (D) shows the guide from (A). The side surface situation which bent and formed the part is shown.

  The fitting state of the ring ends 13a and 14a of the cylindrical elastic body fixing member 10 configured in the half ring body 10a having such a configuration is such that both the ring ends 13a and 14a are connected to the outer periphery guide portion 15 as described above, for example. This is done by guiding the outer peripheral side of the ring end 13a and adjusting the overlapping state of both the ring ends 13a, 14a, but such overlapping can be done by holding both the ring ends 13a, 14a by hand. Although this is a work that requires a considerable force, the present inventor has considered the mounting jig 30 as shown in FIG. 7 so that the work can be easily performed.

  In the configuration shown in FIGS. 3A and 4, an attachment jig 30 for adjusting the overlapping degree of the ring ends 13 a and 14 a is detachably provided on the half ring body 10 a on the ring ends 13 a and 14 a side. Jig locking portions 18 and 19 are provided, respectively. The overlapping state of the ring ends 13a and 14a, that is, the fitting state can be adjusted by reducing or widening the interval between the jig locking portions 18 and 19 by operating the mounting jig 30. The mounting jig 30 will be described in detail in the second embodiment below.

(Embodiment 2)
In the present embodiment, the jig 30 for attaching the cylindrical elastic body fixing member 10 configured in the half ring body 10a described in the first embodiment to the cylindrical elastic body will be described.

  The mounting jig 30 shown in FIG. 7 is configured by screwing a right screw nut 32 and a left screw nut 33 to the left and right sides of a long bolt 30a having a shape in which reverse screws are cut on the left and right of a bar. That is, in the case shown in FIG. 7, the long bolt 30a is provided with a right screw bolt portion 31a with a right screw cut on the left side of the bar 31 and a left screw bolt portion 31b with a left screw cut on the right side. A rotating body 31c for rotating the long bolt 30a is provided between the right screw bolt 31a and the left screw bolt 31b.

  As shown in FIG. 7, a right screw nut 32 is screwed to the right screw bolt portion 31a, and a left screw nut 33 is screwed to the left screw bolt portion 31b. The right screw nut 32 and the left screw nut 33 are provided with locking portions 32a and 33a to the cylindrical elastic body fixing member 10 having the configuration described in the first embodiment, respectively.

  The locking portions 32a and 33a are formed in the shape of protrusions that can be locked to the jig locking portions 18 and 19 shown in FIGS. As shown in FIG. 7, the protrusions of the locking portions 32 a and 33 a are formed, for example, so as to widen the bottom. As shown in FIG. 7, the projection tip angle β of the locking portions 32a and 33a is preferably an acute angle so that the locking is easy.

  The rotating body 31c is rotated in a state where the locking portions 32a and 33a are inserted into the jig locking portions 18 and 19 formed in the locking holes 18a and 19a provided on the plate surface S of the half ring body 10a. Then, since the locking portions 32a and 33a are locked in the locking holes 18a and 19a, the rotation of the right screw nut 32 and the left screw nut 33 is suppressed, and the right screw nut 32 and the left screw nut 33 are moved to the left and right. Or move closer.

  In response to the movement of the right screw nut 32 and the left screw nut 33, the locking portions 32a and 33a move so as to expand to the left and right or approach each other. As a result, when the locking holes 18a and 19a locked to the locking portions 32a and 33a move so as to expand left and right, the overlapping state of the ring ends 13a and 14a becomes a shallow fitting state, and the half ring body The outer peripheral length of 10a increases. Further, when the locking holes 18a and 19a move closer to each other in response to the movement of the locking portions 32a and 33a, the overlapping state of the ring ends 13a and 14a becomes a deep fitting state, and the outer periphery of the half ring body 10a The length is reduced.

  That is, if the mounting jig 30 having the above-described configuration is used, the right and left screw nuts 32 and 33 are appropriately moved to the left and right in the manner described above by adjusting the rotation of the rotary body 31c, and the ring ends 13a and 14a are fitted. By adjusting the state, the outer peripheral length of the cylindrical elastic body fixing member 10 formed in the half ring body 10a can be varied, and the inner peripheral side of the applied cylindrical elastic body can be appropriately pressed. The outer peripheral length of the cylindrical elastic body fixing member 10 can be easily adjusted without performing operations such as superimposing the ring ends 13a and 14a by hand. Since the circumference can be varied by screwing a screw and a nut, fine adjustment can be performed in units of threading pitch.

  For example, a method of using the mounting jig 30 will be described in more detail by taking as an example a case where the crack 42 of the pipe wall 41 of the concrete pipe 40a shown in FIG. To do.

  First, the cylindrical elastic body fixing member 10 having an optimum outer peripheral length is selected according to the cylindrical elastic body 50 to be applied. That is, the outer peripheral length in a state where the ring ends 13 a and 14 a are fitted presses the cylindrical elastic body 50 against the inner peripheral surface of the tube wall 41, so that the outer peripheral portion of the cylindrical elastic body 50 and the inner wall of the tube wall 41 are The cylindrical elastic body fixing member 10 is selected from which the outer peripheral length necessary for securing the sealed state with the peripheral portion is obtained.

  By applying the mounting jig 30 having the above-described configuration to the cylindrical elastic body fixing member 10 configured in the half ring body 10a thus selected, the outer peripheral length of the cylindrical elastic body fixing member 10 is temporarily set. The inner diameter of the cylindrical elastic body 50 to be applied is reduced. That is, in a state where the locking portions 32a and 33a of the mounting jig 30 are locked to the locking holes 18a and 19a provided on the plate surface S of the cylindrical elastic body fixing member 10, the locking portions 32a and 33a are The rotating body 31c is rotated in a direction approaching each other.

  In a state where the outer peripheral length is reduced in this way, the cylinder is placed in the cylindrical elastic body 50 provided so that the outer peripheral surface is in contact with the inner peripheral surface of the pipe wall 41 where the crack 42 of the concrete pipe 40a has been generated in advance. The elastic member fixing member 10 is inserted. When the cylindrical elastic body fixing member 10 is put into the cylindrical elastic body 50, the half ring surface of the half ring body 10 a of the cylindrical elastic body fixing member 10 is orthogonal to the cylindrical direction of the cylindrical elastic body 50. Put it in the position.

  Such a state is schematically shown in FIG. In FIG. 8, the member lengths and the like of the locking portions 32 a and 33 a are exaggerated so that the usage state of the mounting jig 30 can be easily understood.

In this state, the rotating body portion 31c of the mounting jig 30 is rotated so that the locking portions 32a and 33a move away from each other in the left and right directions. That is, the rotating body 31c is rotated so that the outer peripheral length of the cylindrical elastic body fixing member 10 is enlarged. By rotating the rotating body 31c in this way,
The outer peripheral length of the cylindrical elastic body fixing member 10 gradually increases, and the outer peripheral surface of the cylindrical elastic body fixing member 10 abuts on the inner peripheral surface of the cylindrical elastic body 50. By pressing the peripheral surface, the outer peripheral surface of the cylindrical elastic body 50 comes into pressure contact with the inner peripheral surface of the concrete pipe 40a.

  When the outer peripheral length is maximized, sealing between the outer peripheral portion of the cylindrical elastic body 50 and the inner peripheral portion of the tube wall 41 is sufficiently secured, and the fitting state of the ring ends 13a and 14a in this state is fixed. To do. When fixing the fitting state of the ring ends 13a and 14a, the ring end 13a is brought into contact with the abutting portion 21 of the bent portion 20a which is the stopper portion 20, and the tapered portion 13b formed on the end surface of the ring end 13a is brought into contact. What is necessary is just to aim at maintenance of a fitting state. The stopper portion 20 provides a function of preventing the circumference from being reduced after the circumference has been enlarged.

  While maintaining the fitting state of the ring ends 13a and 14a as described above, the rotating body 31c of the mounting jig 30 is again rotated so that the locking portions 32a and 33a approach each other. In the state where the fitting state of the ring ends 13a and 14a is fixed, the positions of the locking holes 18a and 19a are fixed. The locked state of 32a, 33a and the locking holes 18a, 19a is loosened. In this state, the locking portions 32a and 33a are removed from the locking holes 18a and 19a, and the mounting jig 30 is removed from the cylindrical elastic body fixing member 10.

  Thus, by using the attachment jig 30, the cylindrical elastic body 50 can be attached to the pipe wall 41 of the concrete pipe 40a so that the crack 42 can be repaired using the cylindrical elastic body fixing member 10. .

  The function of the mounting jig 30 can also be achieved with the configuration shown in FIG. In the configuration shown in FIG. 9, reverse screws are cut to the left and right of the long nut 30b, and the right screw bolt 35 and the left screw bolt 36 are screwed from the left and right. The right screw bolt 35 and the left screw bolt 36 are respectively provided with locking portions 35a and 36a for the cylindrical elastic body fixing member 10 having the configuration described in the first embodiment.

  The locking portions 35a and 36a are formed in the shape of protrusions that can be locked to the jig locking portions 18 and 19 shown in FIGS. As shown in FIG. 9, the protrusions of the locking portions 35 a and 36 a are formed, for example, so as to spread out. By rotating the long nut 30b with the locking portions 35a and 36a inserted into the locking portions 18 and 19 for jigs formed in the locking holes 18a and 19a provided in the half ring body 10a, the jig The locking portion 35a of the right screw bolt 35 and the locking portion 36a of the left screw bolt 36 which are locked and fixed to the locking portions 18 and 19 can be moved to the left and right.

  For example, if the interval between the locking portions 35a and 36a is increased, the overlapping degree of the ring ends 13a and 14a is adjusted to be small, and the outer peripheral length of the half ring body 10a is increased. On the other hand, if it moves so that the space | interval of the latching | locking parts 35a and 36a may be narrowed, the overlapping degree of the ring ends 13a and 14a will be adjusted largely, and the outer peripheral length of the half ring body 10a will be reduced.

  The mounting jig 30 shown in FIG. 9 having such a configuration can also be used in the same manner as described in the configuration of FIG.

  Although the present invention has been specifically described above based on the embodiments, the present invention is not limited to such embodiments, and various modifications may be made without departing from the scope of the present invention.

  For example, in the above description, the case where the back side of the bent portion 20a is configured as the contact portion 21 is shown as the configuration of the stopper portion 20, but a configuration other than the contact portion 21 may of course be used. As shown in FIGS. 10A and 10B, the bent portion 20 b configured as the stopper portion 20 is bent into a concave portion 22 having a substantially U-shaped cross section, and the ring end 13 a side is simply inserted into the concave portion 22. Thus, the fitting state may be maintained. In such a configuration, there is no trouble in setting the angles of the contact portion 21 and the tapered portion 13b.

  Alternatively, as shown in FIG. 10 (C), a protrusion 13c is formed on the ring end 13a side by bending or the like so as to protrude from the outer periphery side of the ring end 13a, and on the plate surface side of the ring end 14a. Alternatively, it is possible to provide a groove 14b to be fitted to the protrusion 13c and maintain the fitted state by fitting the protrusion 13c to the groove 14b.

(A) is a plan view showing the shape of a material used for integrally forming a cylindrical elastic body fixing member, (B) is an end surface of (A), and (C) is a guide portion from (A). (D) shows a side situation when the guide portion is bent from (A), (E) shows a situation of the outer peripheral guide portion provided at the ring end, and (F) shows the initial state. It is a top view which shows the raw material shape in consideration of the outer periphery guide part. (A) is a side view which shows the semi-ring shape of a cylindrical elastic body fixing member, (B) is sectional drawing in the AA line in (A) which shows the fitting condition of a ring end. (A) is a fragmentary perspective view which shows a mode that the taper part of a ring end is being fixed with the stopper part, (B) is a fragmentary sectional view in the AA line of the stopper part of (A). It is a fragmentary perspective view which shows the modification which provided multiple taper parts in the ring end side. (A), (B) is a fragmentary sectional view which shows the usage example of a cylindrical elastic body fixing member, respectively. (A) shows a trapezoidal material shape used for integrally forming a cylindrical elastic body fixing member as a plan view, (B) shows an end face of (A), and (C) shows (A). FIG. 9D is a side view showing a state in which the guide portion is bent and formed from (D). FIG. It is a front view which shows the whole structure of an attachment jig. It is a front view which shows a mode that the cylindrical elastic body fixing member was provided in the cylindrical elastic body using the attachment jig. It is a front view which shows the whole structure of the modification of an attachment jig. (A), (B), (C) is explanatory drawing which shows the structure of the modification of a stopper part. (A) is a front view which shows the whole structure of the conventional cylindrical elastic body fixing member, (B) is a fragmentary sectional view which shows the connection condition of a ring end.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical elastic body fixing member 1a Half ring body 2a Ring end 2b Ring end 3 Top 4 Guide 5 Protrusion 10 Cylindrical elastic body fixing member 10a Half ring body 11 Plate material 11a Long material 12 Guide part 12a Inner guide part 12b Outer guide portion 13 Full width W1 side 13a Ring end 13b Tapered portion 13c Projection portion 14 Plate surface width W2 side 14a Ring end 14b Groove portion 15 Outer peripheral guide portion 16 Notch 17 Opening portion 18 Jig locking portion 18a Locking hole 19 Jig Locking part 19a Locking hole 20 Stopper part 20a Bending part 20b Bending part 21 Abutting part 22 Recessed part 30 Mounting jig 30a Long bolt 30b Long nut 31 Bar material 31a Right screw bolt part 31b Left screw bolt part 31c Rotating body part 32 Right Screw nut 32a Locking portion 33 Left screw nut 33a Locking portion 35 Right screw bolt 35a Stop portion 36 Left-hand screw bolt 36a Locking portion 40 Cylindrical body 40a Concrete pipe 41 Tube wall 42 Crack 43 Side wall 44 Circular opening 44a Circular inner peripheral portion 45 Pipe 50 Cylindrical elastic body 50a Elastic joint 51 Large diameter portion 52 Groove portion 53 Small diameter portion a Folding line S Plate surface W1 Plate surface width W2 Plate surface width θ1 Angle θ2 Angle α Clearance (backlash)
β Projection tip angle

Claims (4)

A cylindrical elastic body that seals between the circular inner peripheral portion and the outer peripheral portion by press-contacting the outer peripheral portion to the circular inner peripheral portion is provided on the inner peripheral side of the cylindrical elastic body. A cylindrical elastic body fixing member that is fixed by press-contacting the outer peripheral side with a variable peripheral length,
Constructed into a non-closed ring-shaped half ring body with long material,
The half ring body is
A guide part that is formed by bending both long sides facing the long material to the inner peripheral side, and fitting one ring end and the other ring end to each other;
It is formed by processing the long material, and has a stopper portion that maintains the fitting state of both ring ends,
The full width including the guide part at the one ring end of the half ring body is formed to be smaller than the plate surface width inside the guide part at the other ring end, and one ring end side is the other ring. A cylindrical elastic body fixing member fitted into the end side in an encapsulated state. In the cylindrical elastic body fixing member according to claim 1,
Cylindrical elastic body fixing characterized in that a tongue-shaped outer peripheral guide portion not provided with the guide portion is integrally provided on the other ring end side in which one ring end side is fitted in an enclosed state. Element. In the cylindrical elastic body fixing member according to claim 1 or 2,
The stopper is formed in a contact portion where a notched portion provided in the long material is bent, and a tapered surface provided at a tip portion on one ring end side is in contact with the stopper. Body fixing member. In the cylindrical elastic body fixing member according to any one of claims 1 to 3,
A cylindrical elastic body fixing member characterized in that jig locking portions for attachment jigs are provided on one ring end side and the other ring end side of the half ring body, respectively.

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