JP2013040445A - Earthquake-ready joint seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake-ready joint seal, which readily deforms following the displacement at a junction of manhole's concrete side lumps caused by earthquake, withstands the inflow pressure of soil or water, is easy to handle, and gives high workability.SOLUTION: An earthquake-ready joint seal 1, which is fixed astride a junction 9 on the inner side of stacked concrete side lumps 7, comprises: a cylindrical joint seal main body 2 formed to fit to the inner periphery of the concrete side lumps 7, having a deflectable sheet made of a high tensile-strength synthetic resin as its base material; and a folding part 3, which, being extendable in the axis direction, is formed along the circumferential direction in the middle of the body part of the cylindrical joint seal main body 2. The outer peripheral surface of the body part on both sides of the folding part 3 is defined as a concrete side lump-adhering surface 4 and is welded with a synthetic fiber sheet 5.

Description

  The present invention relates to an earthquake joint joint that is fixed so as to straddle a joint inside a laminated concrete side block, and the earthquake joint joint.

  Seismic facilities have been severely damaged by major earthquakes that occurred in the past, and the impact on citizens' lives was serious. Among them, there are many damages such as slipping of the joints of the concrete side chunks in the human holes for sewers constructed by laminating the concrete side chunks, and earth and sand and water are removed from the joints. The situation that it entered into the inside and the function of the sewer was damaged.

  For this reason, when the joint part of the concrete side block of the human hole is displaced due to the earthquake, a means to prevent the inflow of earth and sand and water from the displacement of the joint part into the human hole is required. A method has been proposed in which a rubber protective collar provided with internal sealants on the inner top and bottom is abutted on the inside of the joint portion of the concrete side lump, and the rubber protective collar is pressed against the concrete side lump by a pressure welding jig. (For example, refer to Patent Document 1).

  According to the means described in this patent document 1, when the joint portion of the concrete side block of the human hole is displaced due to an earthquake, the rubber made by pressure contact is applied to the inside of the joint portion of the concrete side block according to the displacement. The protective collar extends to maintain the state where the joint portion is blocked, and the inflow of earth and sand and water from the displacement of the joint portion into the human hole can be prevented.

Japanese Patent Laid-Open No. 2000-29134

  However, according to the means described in this patent document 1, when the pressure of inflow of earth and sand or water from the displacement of the joint into the human hole exceeds the rubber elongation limit of the rubber protective collar, the rubber protective collar Will break. For this reason, when the inflow pressure of earth and sand or water is predicted to be large, in order to withstand this inflow pressure, it is necessary to set a thick rubber protective collar. There was a problem that it was difficult to press the protective collar against the concrete side block, and the cost was increased.

  The object of the present invention is to easily deform following the displacement of the joint part of the concrete side block of the human hole due to the earthquake, and to withstand the inflow pressure of earth and sand, water, easy handling and good workability. It is to provide joint joints for earthquakes.

  In order to achieve the above object, the invention described in claim 1 is an earthquake-resistant joint joint that is fixed inside a laminated concrete side block so as to straddle the joint, and has a high tensile strength. A cylindrical joint main body corresponding to the inner periphery of the concrete side block is formed using the flexible sheet formed in step 1 as a base material, and can be expanded in the axial direction at the center of the trunk of the cylindrical joint main body. The folding part is formed in the circumferential direction, and the outer peripheral surface of the body part on both sides of the folding part is a concrete side lump adhesion surface, and a synthetic fiber sheet is welded to at least the concrete side lump adhesion surface.

  The invention according to claim 2 corresponds to the inner periphery of the concrete side block with a flexible sheet formed of a synthetic resin as a base material in the cylindrical joint body according to claim 1. A cylindrical covering member having an inner diameter and having a cylinder length substantially the same as that of the cylindrical joint main body is fitted, and the inner peripheral surface of the body on both sides of the folded portion of the cylindrical joint main body and the cylindrical covering member The outer peripheral surfaces at both ends are welded and integrated, and the tubular covering member is further provided with an easily breakable portion in the circumferential direction inside the welded portion with the tubular joint body. And

According to the earthquake joint joint according to claim 1, a cylindrical joint main body corresponding to the inner periphery of the concrete side lump is formed using a flexible sheet formed of a synthetic resin having a high tensile strength as a base material, A foldable portion that can be expanded in the axial direction is formed in the circumferential direction at the center of the body portion of the tubular joint body, and the outer peripheral surfaces of the body portions on both sides of the foldable portion are concrete side lump bonding surfaces, at least on the concrete side Since the synthetic fiber sheet is welded to the lump bonding surface, the cylindrical joint body is placed so that the folded part is folded over the bonded concrete side lump so as to straddle the joint. Adhering one side of the concrete side block bonding surface to which the synthetic fiber sheet on both sides of the folded part is welded to the inside of the upper concrete side block, and the other side to the inside of the lower side concrete block When the joint portion of the concrete side block of the human hole is displaced due to an earthquake, the tubular joint body is not limited, regardless of whether the displacement direction is the vertical direction, that is, the vertical direction, the horizontal direction, or the rotational direction. Can be deformed following the displacement of the joint part of the concrete side block due to the development and bending of the folding part formed in the center of the trunk part, The function to prevent inflow of earth and sand and water can be maintained.
Since the cylindrical joint body is made of a flexible sheet formed of a synthetic resin having a high tensile strength, it can be formed thinner than a conventional rubber, so that the space inside the human hole is narrowed. It is possible to prevent, reduce the weight, handle easily, fix to the concrete side block easily, and reduce the cost.
In addition, since the synthetic fiber sheet is welded to the concrete side lump bonding surfaces on both sides of the folded portion of the cylindrical joint body, the concrete side lump bonding surface of the cylindrical joint body is connected to the concrete side by an adhesive. When bonded to the lump, the fiber of the synthetic fiber sheet becomes an anchor, and the concrete side lump bonding surface of the cylindrical joint main body can be firmly fixed to the concrete side lump.

According to the earthquake joint joint according to claim 2, in the tubular joint joint body according to claim 1, the side wall of the concrete side block is formed of a flexible sheet formed of a synthetic resin as a base material. A cylindrical covering member having an inner diameter corresponding to the inner periphery and having a cylinder length substantially the same as that of the cylindrical joint body is fitted, and the inner peripheral surface of the body part on both sides of the folding part in the cylindrical joint body and the The outer peripheral surfaces of both ends of the cylindrical covering member are welded and integrated, and the tubular covering member is provided with an easily breakable portion in the circumferential direction inside the welded portion with the cylindrical joint body. Therefore, the cylindrical joint body fixed to the inside of the concrete side block is covered with the cylindrical covering member and is not exposed in the human hole. When entering the inside, the sand and sand etc. It is possible to prevent such fall folds of the body.
In addition, when the joint portion of the concrete side block of the human hole is displaced due to an earthquake, the easily breakable portion of the tubular covering member is broken by this displacement, so that the deformation of the folded portion of the tubular joint body is obstructed. Don't be.

It is a partially cutaway perspective view showing a first example of an embodiment of an earthquake joint joint according to the present invention. It is end surface explanatory drawing which shows the other example of the folding shape of the folding part formed in the cylindrical joint main body. It is a longitudinal cross-sectional view which shows the state which fixed the earthquake joint joint of the 1st example to the junction part of the concrete side block of a human hole. It is a partially cutaway perspective view showing a second example of an embodiment of an earthquake joint joint according to the present invention. It is a longitudinal cross-sectional view which shows the state which fixed the joint for earthquake corresponding to the 2nd example to the junction part of the concrete side block of a human hole. It is a partially cutaway perspective view showing a third example of an embodiment of an earthquake joint joint according to the present invention. It is a longitudinal cross-sectional view which shows the state which fixed the earthquake joint joint of the 3rd example to the junction part of the concrete side block of a human hole. It is a partially cutaway perspective view showing a fourth example of an embodiment of an earthquake joint joint according to the present invention. It is a longitudinal cross-sectional view which shows the state which fixed the earthquake joint joint of the 4th example to the junction part of the concrete side block of a human hole.

Hereinafter, the form for implementing the earthquake joint joint according to the present invention will be described in detail.
1 and 2 show a first example of an embodiment of an earthquake joint joint according to the present invention, FIG. 1 is a partially cutaway perspective view of this example, and FIG. 2 shows a cylindrical joint joint body. It is end surface explanatory drawing which shows the other example of the folding shape of the formed folding part.

  The earthquake joint joint 1 of this example is a cylindrical joint joint corresponding to the inner periphery of a concrete side block using a flexible sheet formed of a synthetic resin having high tensile strength and water resistance and chemical resistance as a base material. A main body 2 is formed, and a foldable portion 3 that can be expanded in the axial direction is formed in the circumferential direction at the center of the body portion of the tubular joint main body 2, and the outer peripheral surfaces of the body portions on both sides of the foldable portion 3 are concrete side blocks. It is set as the adhesion surface 4, and it has the structure by which the synthetic fiber sheet 5 was welded to this concrete side lump adhesion surface 4. As shown in FIG.

  More specifically, in this example, polypropylene, polyethylene, polyvinyl chloride, or the like is used as a synthetic resin for forming a flexible sheet serving as a base material of the cylindrical joint body 2. This substrate has a flat surface, and its thickness is sufficient to correspond to the expected inflow pressure of earth and sand flowing into the manhole due to this deviation when the joint part of the concrete side block of the manhole is displaced. Is set.

Further, in this example, the folding portion 3 formed at the center of the trunk portion of the tubular joint body 2 is further folded after the center portion of the trunk portion is folded back toward the upper and lower edges toward the inside of the trunk portion. The folded portion 3 is formed by folding back to the center side.
The folding amount of the folding portion 3 is set as an amount that can follow the displacement of the joint portion of the concrete side block of the human hole described later when the folding portion 3 in the folded state is unfolded.
Therefore, the folding shape of the folding portion 3 is not limited to the above-mentioned shape as long as an amount that can follow the displacement of the joint portion of the concrete side block of the human hole can be secured. For example, as shown in FIG. It may be folded in a Z shape, may be folded in a wave shape as shown in (B), or may be folded in a mountain shape as shown in (C).

Moreover, the synthetic fiber sheet 5 welded to the concrete side lump bonding surfaces 4 on both sides of the folding part 3 uses fibers such as polypropylene, polyethylene, polystyrene, polyvinyl chloride, etc. in this example. Any of woven fabric and non-woven fabric may be used.
In this example, the synthetic fiber sheet 5 is welded to the concrete side lump bonding surface 4 on the outer peripheral surface of the trunk portion on both sides of the folding portion 3, but is welded to the entire outer periphery of the trunk portion of the tubular joint body 2. It may be done (not shown).

The earthquake joint joint 1 configured as described above is manufactured as follows.
First, a band-shaped base material having a predetermined width that is the width of the body portion of the cylindrical joint body 2 is cut into a length corresponding to the inner periphery of the concrete side block, and the surface that becomes the outer peripheral surface of the tubular joint body 2 Thus, the synthetic fiber sheet 5 is welded on the surfaces to be the concrete side lump bonding surfaces 4 formed on both sides of the folding portion 3 formed at the center of the base material, leaving a welding portion at one end in the length direction.
Next, in the center of the base material on which the synthetic fiber sheet 5 is welded, the center portion of the base material is folded back to the upper and lower edge side toward the surface side of the base material that is the outer peripheral surface of the tubular joint body 2. Furthermore, it folds back to the center side, folds, and heat-presses to form the folded portion 3.
Or the base material which formed the folding part 3 in the center can also be shape | molded using the metal mold | die for injection molding.
In this manner, the base material on which the folded portion 3 is formed is welded in such a manner that the other end portion is overlapped and welded to the welding portion of the one end portion so that the surface side on which the synthetic fiber sheet 5 is welded becomes the outer surface. The joint 1 is manufactured.

  A use example in which the earthquake joint joint 1 of this example configured in this way is used for earthquake response of a human hole will be described with reference to FIG. FIG. 3 is a longitudinal sectional view showing a state in which the earthquake joint joint 1 of the first example is fixed to the joint portion of the concrete side block of the human hole.

  First, the concrete jointed up and down which joins the cylindrical joint main body 2 with the joint part 8 interposed inside the concrete side lump 7 in which the human hole 6 is laminated in the state in which the folding part 3 is folded. It arrange | positions so that the junction part 9 of the side lump 7 may be straddled.

Next, one side of the concrete side block bonding surfaces 4 on both sides of the folding part 3 is bonded and fixed to the inside of the upper concrete side block 7 and the other is bonded to the inside of the lower concrete side block 7 with an adhesive. Since the synthetic fiber sheet 5 is welded to the concrete side lump bonding surface 4,
When the concrete side lump bonding surface 4 of the tubular joint body 2 is bonded to the concrete side lump 7 with an adhesive, the fibers of the synthetic fiber sheet 5 serve as anchors, and the concrete side lump bonding surface 4 of the cylindrical joint body 2 is It is possible to firmly adhere to the concrete side block 7 and firmly and securely fix the tubular joint joint body 2 to the inside of the concrete side block 7.

  In this way, by fixing the joint 1 for earthquake corresponding to this example to the inside of the concrete side block 7, when the joint 9 of the concrete side block 8 of the human hole 6 is displaced due to the earthquake, the displacement direction is up and down. In any direction, that is, in the longitudinal direction, the lateral direction, and the rotational direction, the tubular joint body 2 has the joint portion 9 of the concrete side block 7 by the unfolding and bending of the folding portion 3 formed at the center of the trunk portion. It can be deformed following the displacement of the concrete, and the inflow of earth and sand and water from the displacement of the joint portion 9 of the concrete side block 7 into the human hole can be prevented.

  And since the cylindrical joint body 2 is made of a flexible sheet made of a synthetic resin having high tensile strength, it can withstand the inflow pressure of earth and sand and water even if it is much thinner than conventional rubber. The tubular joint body 2 can be formed thinner than rubber.

FIG. 4 shows a second example of an embodiment of an earthquake joint joint according to the present invention, and FIG. 4 is a partially cutaway perspective view of this example.
The earthquake joint joint 1 of the present example is not different from the first example in the basic configuration, and the same configuration as in the first example will be described with the same reference numerals.

In the earthquake joint joint 1 of this example, the folding part 3 formed at the center of the trunk part of the cylindrical joint main body 2 is such that the center part of the trunk part is on the upper and lower edge sides toward the outside of the trunk part. After being folded back, it is further folded back to the center side to form the folded portion 3.
Further, the outer peripheral surface of the body portion exposed on both sides of the folded portion 3 is a concrete side lump bonding surface 4, and a synthetic fiber sheet 5 is welded to the concrete side lump bonding surface 4.
Since the other configuration is the same as that of the first example, the description of the first example is cited and the description thereof is omitted.

  A use example in which the earthquake joint joint 1 according to the present example configured as described above is used for earthquake response of a human hole will be described with reference to FIG. FIG. 5 is a longitudinal sectional view showing a state in which the earthquake joint joint 1 of the second example is fixed to the joint portion of the concrete side block of the human hole.

  First, as in the first example, the tubular joint main body 2 is joined to the inside of the concrete side block 7 in which the human holes 6 are stacked with the joint portion 8 interposed, with the folding portion 3 being folded. It arrange | positions so that the junction part 9 of the concrete side block 7 laminated | stacked up and down may be straddled.

Next, one side of the concrete side block bonding surfaces 4 on both sides of the folding part 3 is bonded and fixed to the inside of the upper concrete side block 7 and the other is bonded to the inside of the lower concrete side block 7 with an adhesive. At this time, the concrete side lump bonding surfaces 4 on both sides of the folding part 3 are formed on the outer peripheral surface of the body part exposed on both sides of the folding part 3, so that the concrete side lump 7 is not obstructed by the folding part 3. Can be securely bonded and fixed inside.
The other operational effects are the same as those in the first example, so the description of the first example is cited and the description thereof is omitted.

FIG. 6 shows a third example of the embodiment of the earthquake joint joint according to the present invention, and FIG. 4 is a partially cutaway perspective view of this example.
The earthquake joint joint 1 of the present example is not different from the first example in the basic configuration, and the same configuration as in the first example will be described with the same reference numerals.

  In the earthquake joint joint 1 of the present example, in the cylindrical joint joint body 2 of the first example described above, a flexible sheet formed of a synthetic resin having water resistance and chemical resistance as a base material, A cylindrical covering member 10 having an inner diameter corresponding to the inner periphery of the concrete side block and having a cylinder length substantially the same as that of the cylindrical joint main body 2 is fitted, and the both sides of the folding part 3 in the cylindrical joint main body 2 are fitted. The inner peripheral surface of the trunk portion and the outer peripheral surfaces on both ends of the cylindrical covering member 10 are welded and integrated.

Further, the tubular covering member 10 is provided with an easily breakable portion 12 in the circumferential direction on the inner side of the welded portion 11 with the tubular joint body 2. The easily breakable portion 12 provided in the cylindrical covering member 10 is formed with a perforation in this example, but is not limited thereto, and may be formed with a thin portion that can be easily broken, for example.
Since the other configuration is the same as that of the first example, the description of the first example is cited and the description thereof is omitted.

  A use example in which the earthquake joint joint 1 of this example configured as described above is used for earthquake response of a human hole will be described with reference to FIG. FIG. 7 is a longitudinal sectional view showing a state in which the earthquake-resistant joint 1 of the third example is fixed to the joint portion of the concrete side block of the human hole.

  First, as in the first example, the tubular joint main body 2 is joined to the inside of the concrete side block 7 in which the human holes 6 are stacked with the joint portion 8 interposed, with the folding portion 3 being folded. It arrange | positions so that the junction part 9 of the concrete side block 7 laminated | stacked up and down may be straddled.

  Next, one side of the concrete side block bonding surfaces 4 on both sides of the folding part 3 is bonded and fixed to the inside of the upper concrete side block 7 and the other is bonded to the inside of the lower concrete side block 7 with an adhesive.

  Thus, by fixing the joint 1 for earthquake corresponding to this example to the inside of the concrete side block 7, when the joint 9 of the concrete side block 7 of the human hole 6 is displaced due to the earthquake, this displacement causes a tubular shape. The easily jointable portion 12 of the covering member 10 is broken, and the tubular joint main body 2 is formed at the center of the trunk portion regardless of whether the displacement direction is the vertical direction, that is, the vertical direction, the horizontal direction, or the rotational direction. The folding and unfolding of the folding portion 3 can be deformed following the displacement of the joint portion 9 of the concrete side block 7, and earth and sand and water from the displacement of the joint portion 9 of the concrete side block 7 into the human hole 6 can be deformed. Inflow can be prevented.

Further, since the tubular joint body 2 is covered with the tubular covering member 10 and is not exposed in the human hole 6, for example, when an operator enters the human hole for inspection, Or the like can be prevented from entering the folding portion 3 of the tubular joint body 2.
Since the operational effect is the same as that of the first example, the description of the first example is cited and the description thereof is omitted.

FIG. 8 shows a fourth example of the embodiment of an earthquake joint joint according to the present invention, and FIG. 8 is a partially cutaway perspective view of this example.
The earthquake joint joint 1 of the present example is not different from the second example in the basic configuration, and the same configuration as in the second example will be described with the same reference numerals.

In the earthquake joint joint 1 of this example, in the cylindrical joint main body 3 of the second example described above, a flexible sheet formed of a water- and chemical-resistant synthetic resin as a base material, A cylindrical covering member 10 having an inner diameter corresponding to the inner periphery of the concrete side block and having a cylinder length substantially the same as that of the cylindrical joint main body 2 is fitted, and the both sides of the folding part 3 in the cylindrical joint main body 2 are fitted. The inner peripheral surface of the trunk portion and the outer peripheral surfaces on both ends of the cylindrical covering member 10 are welded and integrated.
Since the other configuration is the same as that of the third example, the description of the third example is cited and the description thereof is omitted.

  A use example in which the earthquake joint joint 1 of this example configured in this way is used for earthquake response of a human hole will be described with reference to FIG. FIG. 9 is a longitudinal sectional view showing a state where the earthquake-resistant joint 1 of the fourth example is fixed to the joint portion of the concrete side block of the human hole.

  First, as in the third example, the tubular joint main body 2 is joined to the inside of the concrete side lump 7 in which the human holes 7 are stacked with the joint portion 8 interposed, with the folding portion 3 being folded. It arrange | positions so that the junction part 9 of the concrete side block 7 laminated | stacked up and down may be straddled.

Next, one side of the concrete side block bonding surfaces 4 on both sides of the folding part 3 is bonded and fixed to the inside of the upper concrete side block 7 and the other is bonded to the inside of the lower concrete side block 7 with an adhesive.
The other operational effects are the same as those in the first example, so the description of the first example is cited and the description thereof is omitted.

DESCRIPTION OF SYMBOLS 1 Earthquake joint joint 2 Cylindrical joint main body 3 Folding part 4 Concrete side lump adhesion surface 5 Synthetic fiber sheet 6 Human hole 7 Concrete side lump 8 Joint part 9 Joint part 10 Cylindrical covering member 11 Welded part 12 Easy fracture part

Claims (2)

  An earthquake-resistant joint joint that is fixed to the inside of the laminated concrete side block so as to straddle the joint. The inner periphery of the concrete side block is made of a flexible sheet formed of a synthetic resin having high tensile strength. A cylindrical joint body corresponding to the above is formed, and in the center of the body portion of the tubular joint body, a foldable portion that can be expanded in the axial direction is formed in the circumferential direction. Is an adhesive joint surface for earthquakes, characterized in that it is a concrete side block bonding surface, and at least a synthetic fiber sheet is welded to the concrete side block bonding surface.   The cylindrical joint main body has an inner diameter corresponding to the inner periphery of the concrete side block using a flexible sheet formed of a synthetic resin as a base material, and the cylinder length is substantially the same as the cylindrical joint main body. Of the cylindrical joint member, the inner peripheral surface of the body portion on both sides of the folded portion of the cylindrical joint body and the outer surface of both ends of the cylindrical cover member are welded and integrated. The earthquake-resistant joint joint according to claim 1, wherein the member is provided with an easily breakable portion in a circumferential direction inside a welded portion with the cylindrical joint joint main body.

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