JP2006233743A - Water cut-off member for joint and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water cut-off joint for joint capable of preventing reduction of water cut-off performance even for a joint part where case bodies cross mutually. <P>SOLUTION: This water cut-off member 10 for joint is integrally molded using one sheet-shaped material having flexibility and watertightness such as rubber and is provided with an elongation part 16 folded to extend in a first horizontal direction and a second horizontal direction crossing the first horizontal direction orthogonally and a first sheet part 11, a second sheet part 12, a third sheet part 13, and a fourth sheet part 14 whose end parts on one side of each sheet part are connected with the elongation part 16 and which are extended like a cross shape when viewed in a plane. Bent parts 17a to 17d having bent reverse U-shaped cross section are formed in a substantially central part of each sheet part, respectively, and each sheet part 17 can extend in the direction of short side of each sheet part. Consequently, since the water cut-off member 10 for joint can be extended in any of horizontal directions by following travel of the case bodies 30a to 30d due to earthquake, water cut-off performance can be maintained when using it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a joint water-stopping material and a method for producing the same, and in particular, a reservoir, a water basin for storing domestic water, industrial water, etc. The present invention relates to a joint water-stopping material used for closing joint portions (hereinafter referred to as “rod bodies”) and a manufacturing method thereof.

  FIG. 4 is an exploded perspective view showing a mounting state of a conventional joint for water-stopping joints, and FIG. 5 is an enlarged cross-sectional view taken along line VV shown in FIG.

  With reference to these drawings, the joint water-stop joint 61 is integrally formed of an elastic body such as natural rubber, and a stress material such as natural fiber is embedded therein. A convex portion 66 having an inverted U-shaped cross section is formed at the center in the width direction, and a pair of sheet bodies 65 a and 65 b are formed on both sides of the convex portion 66. Further, on the lower surface of each of the sheet body 65a and the sheet body 65b, a pair of water stopping ridges 67a, a water stopping ridge 67b, a pair of water stopping ridges 68a, A protrusion 68b is formed.

  At the time of use, the joint water stop joint 61 is lowered and placed in the direction of the arrow so as to cover the upper part of the joint portion 63 formed between the opposite housing 62a and housing 62b. In this state, as shown in (1) of FIG. 5, the sheet 65a between the water stopping ridge 67a and the water stopping ridge 67b, the water stopping ridge 68a, and the water stopping ridge 68b. The sheet body 65b is fixed to each of the housing 62a and the housing 62b using a fixing tool (not shown). In this way, the joint portion 63 is sealed by the joint water stop joint 61.

  Next, it is assumed that the case 62a and the case 62b are moved or displaced due to an earthquake or the like, and the interval between the joints 63 is changed from the state when the joints 61 are attached. This state is shown in (2) of FIG. In this example, the interval between the joint portions 63 is widened, but the change is absorbed by the convex portion 66 of the joint for water stop 61 in a flat state, thereby leaking water from the joint portion 63. Etc. are prevented.

  In the conventional joint for joints as described above, there is no particular problem with respect to the joint part that is linear in plan view as described above. However, it cannot be said that the conventional joint for water-stopping joints as described above can exhibit sufficient water-stopping performance for joints intersecting in plan view.

  FIG. 6 is an exploded perspective view showing a mounting state of a joint for joints used in a conventional cross-shaped joint.

  Referring to the drawing, each of four casings 62a to 62d is arranged so as to face each other in a planar state. And the joint part 63a-joint part 63d formed of these housings has a cross shape in planar view.

  On the other hand, the joint water-stop joint 70 corresponding to such a cross-shaped joint part has a first sheet part 72, a second sheet part 74, a third sheet part extending from the center part in a direction orthogonal to each other in the horizontal direction. The sheet portion 76 and the fourth sheet portion 78 are formed. The first sheet portion 72 has a rectangular sheet shape, and a first convex portion 73 having an inverted U-shaped cross section extending in the longitudinal direction is formed at the center thereof. Similarly, the second sheet portion 74 is formed. Is formed with a second convex portion 75, a third convex portion 77 with respect to the third sheet portion 76, and a fourth convex portion 79 with respect to the fourth sheet portion 78. Yes. And these sheet | seat parts are integrally molded so that it may be connected in the state mutually faced | matched in the center part.

  At the time of use, the center portion of the joint joint 70 for joints is disposed on the intersection of the joint portions 63a to 63d, and the first convex portion 73, the second convex portion 75, the second convex portion 75, The third convex portion 77 and the fourth convex portion 79 are installed on the casings 62a to 62d so that the formation directions thereof correspond to the joint portions 63a to 63d, respectively. In this state, the attachment is completed by fixing the joint water-stopping joint 70 to the housing 62 using the fixing tool (not shown) as described above.

  However, in such joint water-stopping joints, the end portions of the first convex portion 73, the second convex portion 75, the third convex portion 77, and the fourth convex portion 79 are joint water-stopping joints. They are directly connected to each other at the center of the joint 70. Therefore, when the housing 62 moves so that each space | interval of the joint part 63a-joint part 63d spreads, the joint water stop joint 70 cannot fully follow the change. For example, the case where the space | interval of the joint part 63a and the joint part 63c spreads is assumed. In this case, the first convex portion 73 and the third convex portion 77 of the joint waterproof joint 70 change so as to be flattened easily, but the second convex portion 75 and the fourth convex portion that are orthogonal to them change. 79 is not easily deformed in its axial direction. That is, the connection part of the center part of the 1st convex part 73 and the 3rd convex part 77 means that it cannot fully deform | transform when a joint is opened widely. For this reason, the sealing performance of the joint waterproof joint 70 may be reduced, and water leakage from the joint may occur.

  This invention was made in order to solve the above subjects, and it aims at providing the water-stop joint for joints in which a water-stop performance does not fall also to the joint part which a housing cross | intersects.

  In order to achieve the above object, the invention described in claim 1 is a joint water-stopping material for closing joint portions intersecting each other in a casing, and is made of a sheet-shaped material having flexibility and water tightness. And a sheet-shaped material having flexibility and watertightness, an elongated portion that is folded so as to be at least stretchable in a first horizontal direction and a second horizontal direction orthogonal to the first horizontal direction. A first sheet portion extending in the first horizontal direction and having one end connected to the extending portion and extending at least in the second horizontal direction; and a sheet shape having flexibility and watertightness. A second sheet portion made of a material and extending in a direction opposite to the first horizontal direction, one end portion of which is connected to the extending portion and extending at least in the second horizontal direction; and flexibility and water tightness Made of a sheet-shaped material having a second horizontal Extends into direction, its one end is connected to the expansion unit, in which a third sheet portion that can be at least extending into the first horizontal direction.

  If comprised in this way, an expansion | extension part will deform | transform following the change of the space | interval of the joint part which cross | intersects T shape, for example.

  The invention described in claim 2 is the structure of the invention described in claim 1, and is made of a sheet-shaped material having flexibility and watertightness, and extends in the direction opposite to the second horizontal direction, and has one end thereof. The portion further includes a fourth sheet portion connected to the extending portion and capable of at least extending in the first horizontal direction.

  If comprised in this way, an expansion | extension part will deform | transform following the change of the space | interval of the joint part which cross | intersects a cross.

  According to a third aspect of the present invention, in the configuration of the first aspect of the invention, each of the first sheet portion, the second sheet portion, the third sheet portion, and the elongated portion has a substantially rectangular sheet shape in plan view, Each central portion is formed with a bent portion bent in a U-shaped cross section extending in the longitudinal direction, and each of the first sheet portion, the second sheet portion and the third sheet portion, and the extension portion is one sheet. The sheet body is integrally formed.

  If comprised in this way, an extending | stretching part and the 1st-3rd each sheet | seat part will be integrally molded.

  According to a fourth aspect of the present invention, in the configuration of the second aspect of the invention, each of the first sheet portion, the second sheet portion, the third sheet portion, the fourth sheet portion, and the extending portion is a substantially rectangular sheet in plan view. Each of the first sheet portion, the second sheet portion, the third sheet portion, and the fourth sheet portion has a shape, and a bent portion that is bent into a U-shaped cross section extending in the longitudinal direction is formed at each central portion. And an extending | stretching part is integrally formed from one sheet | seat body.

  If comprised in this way, an expansion | extension part and the 1st to 4th each sheet | seat part will be integrally molded.

  The invention according to claim 5 is a method of manufacturing a joint water-stopping material that closes joint portions intersecting each other in the housing, and prepares a single sheet body made of a material having flexibility and water tightness, A first step of bending a belt-like first region extending in the first horizontal direction in the sheet body so that the sheet body can extend at least in a second horizontal direction perpendicular to the first horizontal direction; The belt-like second region extending from the second horizontal direction to the first horizontal direction is bent so that the sheet body can extend at least in the first horizontal direction, and the first region in the vicinity of the connection portion between the first region and the second region And a second step of folding a part of the region so that the sheet member can at least extend in the first horizontal direction.

  If comprised in this way, the water stop material for T-shaped joints etc. which can expand | extend in any direction of a 1st horizontal direction and a 2nd horizontal direction will be formed with one sheet | seat body.

  According to a sixth aspect of the present invention, in the configuration of the fifth aspect of the invention, the second step includes a belt-like third region extending from the first region in the direction opposite to the second horizontal direction, and the sheet body is the first. The sheet body is bent so that it can be extended at least in the horizontal direction, and a part of the first area in the vicinity of the connecting portion between the first area and the third area can be extended at least in the first horizontal direction. The method further includes a folding step.

  If comprised in this way, the water stop material for cross-shaped joints which can be expand | extended in any direction of a 1st horizontal direction and a 2nd horizontal direction will be formed with the sheet | seat body of 1 sheet.

  According to a seventh aspect of the present invention, in the configuration of the first aspect of the invention, each of the first sheet portion, the second sheet portion, the third sheet portion, and the elongated portion has a substantially rectangular shape in plan view. Is formed integrally from a single sheet body, and the first sheet portion is formed by folding a belt-like first region extending in the longitudinal direction from the center of one side of the elongated portion in the second horizontal direction. The band-shaped second region extending in the longitudinal direction from the center of the other side of the extended portion is folded in the second horizontal direction, and the third sheet portion extends in the longitudinal direction from the center of the other side of the extended portion. A band-shaped third region extending in the direction is folded in a direction opposite to the first horizontal direction, and the extending portion has a T-shaped region extending outward from the center and connected to each of the first region to the third region. The folding of each of the first sheet part to the third sheet part With its outer region in a manner continuous to the moiety that is folded, the central region and the vicinity are intended to be folded so as to flatten.

  If comprised in this way, an extending | stretching part and the 1st-3rd each sheet | seat part will be shape | molded and formed in a flat shape.

  According to an eighth aspect of the present invention, in the configuration of the second aspect of the invention, each of the first sheet portion, the second sheet portion, the third sheet portion, the fourth sheet portion, and the extending portion is substantially rectangular in plan view. These are integrally formed from a single sheet body, and the first sheet portion has a strip-shaped first region extending in the longitudinal direction from the center of one side of the elongated portion and folded in the second horizontal direction. The second sheet portion has a band-like second region extending in the longitudinal direction from the center of the other side of the extended portion in the second horizontal direction, and the third sheet portion is formed on the other side of the extended portion. A belt-like third region extending in the longitudinal direction from the center is folded in a direction opposite to the first horizontal direction, and the fourth sheet portion is formed in a belt-like first region extending in the longitudinal direction from the center of the other side of the extending portion. 4 areas are folded in the opposite direction to the first horizontal direction The extending portion extends in the outward direction from the center thereof, and the cross-shaped region connected to each of the first region to the fourth region is continuous with each folded portion of the first sheet portion to the fourth sheet portion. The outer region is folded and the central region and the vicinity thereof are folded so as to be flattened.

  If comprised in this way, an expansion | extension part and each 1st-4th sheet | seat part will be shape | molded and formed in a flat shape.

  According to a ninth aspect of the invention, in the configuration of the second aspect of the invention, each of the first sheet portion, the second sheet portion, the third sheet portion, the fourth sheet portion, and the extending portion is substantially rectangular in a plan view. These are integrally formed from a single sheet body, and the first sheet portion has a strip-shaped first region extending in the longitudinal direction from the center of one side of the elongated portion and folded in the second horizontal direction. The second sheet portion has a band-like second region extending in the longitudinal direction from the center of the other side of the extended portion in the second horizontal direction, and the third sheet portion is formed on the other side of the extended portion. A belt-like third region extending in the longitudinal direction from the center is folded in the first horizontal direction, and the fourth sheet portion has a belt-like fourth region extending in the longitudinal direction from the center of the other side of the elongated portion. 1 is folded in the opposite direction to the horizontal direction, The cross-shaped region extending outward from the center of the sheet and connected to each of the first region to the fourth region is continuous with the folded portion of each of the first sheet portion to the fourth sheet portion. Is folded so that the central region and the vicinity thereof are flattened.

  If comprised in this way, an expansion | extension part and each 1st-4th sheet | seat part will be shape | molded and formed in a flat shape. In addition, the folding thickness of the extending portion on the third sheet portion side is smaller than the folding thickness on the second sheet portion side.

  The invention according to claim 10 is a method of manufacturing a joint water-stopping material that closes joint portions intersecting each other in a casing, and prepares a single sheet body made of a material having flexibility and water tightness, In the sheet body, a strip-shaped first region extending in the first horizontal direction from the center of one side in the central portion of the rectangular shape and a strip-shaped second extending from the center of the other side of the central portion in the opposite direction to the first horizontal direction. The region is folded so that it can extend in a second horizontal direction orthogonal to the first horizontal direction, and a strip-shaped third region extending in the second horizontal direction from the center of the other side of the central portion is A first step of folding so as to extend in the horizontal direction, and a T-shaped region extending from the center to the outside and connected to each of the first region to the third region in the central portion from the first region to the third region. In a continuous manner in each folded part of the region With folding the outer region of the, in which a second step of folding the central region and the vicinity to flatten.

  If comprised in this way, the water-stopping material for T-shaped joints etc. which can be extended in any direction of the 1st horizontal direction and the 2nd horizontal direction by one sheet | seat body in a flat shape. Molded.

  The invention according to claim 11 is a method of manufacturing a joint water-stopping material that closes joint portions intersecting each other in the housing, and prepares a single sheet body made of a material having flexibility and water tightness, In the sheet body, a strip-shaped first region extending in the first horizontal direction from the center of one side in the central portion of the rectangular shape and a strip-shaped second extending from the center of the other side of the central portion in the opposite direction to the first horizontal direction. The area is folded so as to extend in a second horizontal direction orthogonal to the first horizontal direction, and a band-shaped third area extending in the second horizontal direction from the center of the other side of the central part, and the central part A first step of folding the belt-like fourth region extending from the center of the other side of the second side in the direction opposite to the second horizontal direction so as to be able to extend in the first horizontal direction; Extending outward and from each of the first region to the fourth region A second step of folding the cross-shaped region that is continuous with each folded portion of the first region to the fourth region in a manner that folds the outer region and flattening the central region and the vicinity thereof; It is equipped with.

  With such a configuration, the cross-shaped joint water-stopping material that can be extended in either the first horizontal direction or the second horizontal direction is formed into a flat shape by a single sheet body. The

  As described above, the invention according to claim 1 is such that, for example, the extension part deforms following the change in the interval between the joints intersecting the T-shape. It becomes possible to maintain the water stoppage performance of the joint that intersects the letter shape.

  In addition to the effect of the invention of claim 1, the invention described in claim 2 is such that the extension part deforms following the change in the distance between the joints intersecting the cross shape. Even if it deviates, it becomes possible to maintain the water stoppage performance of the joint part that intersects the cross.

  In addition to the effect of the invention described in claim 1, the invention described in claim 3 has the extension part and the first to third sheet parts integrally formed. As well as improving, for example, it is possible to efficiently stop water at a joint portion intersecting, for example, a T-shape.

  In addition to the effect of the invention described in claim 2, the invention described in claim 4 has the extension part and the first to fourth sheet parts integrally formed, so that the water stop performance of the entire water stop material is improved. As well as improving, it becomes possible to effectively stop the joints intersecting the cross shape.

  In the invention according to claim 5, for example, a water-stopping material for a T-shaped joint that is extendable in any of the first horizontal direction and the second horizontal direction is formed by a single sheet body. It becomes possible to manufacture the joint water-stopping material efficiently.

  In addition to the effect of the invention described in claim 5, the invention described in claim 6 is a cross joint that can be extended in either the first horizontal direction or the second horizontal direction by a single sheet member. Therefore, the joint water-stopping material corresponding to the cross-shaped joint portion can be efficiently manufactured.

  In addition to the effect of the invention described in claim 1, the invention described in claim 7 is formed integrally with the extending portion and the first to third sheet portions, so that the water stop performance of the entire water stop material is improved. As well as improving, for example, it is possible to efficiently stop water at a joint portion intersecting the T-shape. Moreover, since the whole is shape | molded by the flat shape, the protrusion with respect to a sheet | seat body is suppressed and the resistance with respect to a water flow etc. is reduced. For this reason, it can be used even for joints without grooves.

  In addition to the effect of the invention described in claim 2, the invention according to claim 8 is characterized in that the extension part and the first to fourth sheet parts are integrally formed, so that the water stop performance of the entire water stop material is improved. As well as improving, it becomes possible to effectively stop the joints intersecting the cross shape. Moreover, since the whole is shape | molded by the flat shape, the protrusion with respect to a sheet | seat body is suppressed and the resistance with respect to a water flow etc. is reduced. For this reason, it can be used even for joints without grooves.

  In addition to the effect of the invention described in claim 2, the invention described in claim 9 is formed integrally with the extending portion and the first to fourth sheet portions. As well as improving, it becomes possible to effectively stop the joints intersecting the cross shape. Moreover, since the whole is shape | molded by the flat shape, the protrusion with respect to a sheet | seat body is suppressed and the resistance with respect to a water flow etc. is reduced. For this reason, it can be used even for joints without grooves. In addition, since the folding thickness of the extending portion on the third sheet portion side is smaller than the folding thickness on the second sheet portion side, resistance to water flow and the like is further reduced.

  In a tenth aspect of the present invention, a water-stopping material for, for example, a T-shaped joint is formed by a single sheet body, which is extendable in both the first horizontal direction and the second horizontal direction. Therefore, it is possible to efficiently manufacture the joint water-stopping material and to form the flat shape, thereby suppressing the protrusion of the sheet body and reducing the resistance to water flow and the like.

  In the invention according to claim 11, since the water-stopping material for the cross-shaped joint that is extendable in both the first horizontal direction and the second horizontal direction is formed by one sheet body, The water-stopping material can be efficiently manufactured and formed into a flat shape, so that the protrusions of the sheet body are suppressed and resistance to water flow and the like is reduced.

  FIG. 1 is an exploded perspective view showing an attachment state of a joint water-stopping material according to a first embodiment of the present invention.

  Referring to the drawing, four casings 30a to 30d are arranged in a state of being abutted in a planar state, and joint parts 29a to 29d having a cross shape in plan view are formed by these casings 30a to 30d.

  On the other hand, the joint waterproofing material 10 according to this embodiment is integrally formed in a cross shape in a plan view by a sheet-like material having flexibility and water tightness such as rubber, and the first horizontal direction The extending portion 16 is folded so as to extend at least in a second horizontal direction orthogonal to the first horizontal direction, and extends in the first horizontal direction and one end thereof is connected to the extending portion 16. The first sheet portion 11 extends in the direction opposite to the first horizontal direction and one end thereof is connected to the extension portion 16 and the second sheet portion 12 extends in the second horizontal direction and one end thereof. A third sheet portion 13 having a portion connected to the extending portion 16 and a fourth sheet portion 14 extending in the opposite direction to the second horizontal direction and having one end connected to the extending portion 16. . Each of the first sheet portion 11, the second sheet portion 12, the third sheet portion 13, and the fourth sheet portion 14 has a substantially rectangular sheet shape in plan view, and each longitudinal portion has a longitudinal direction in each substantially central portion. Each of the bent portions 17a to 17d bent in an inverted U-shaped cross section is formed. Therefore, each of the first sheet portion 11 and the second sheet portion 12 can extend at least in the second horizontal direction (each short side direction), and the third sheet portion 13 and the fourth sheet portion. Each of 14 can extend at least in the first horizontal direction (each short side direction).

  Note that a pair of water stopping ridges 25a, 25b and a pair of protrusions projecting downward and arranged in parallel to each other on the lower surfaces of the pair of flat portions 18a and 18b connected to the bent portion 17b of the second sheet portion 12. The water stopping ridges 26a and 26b are formed, and these are the same as those in the joint water stopping joint shown in the conventional example (FIGS. 4 to 6). In addition, the first sheet portion 11, the third sheet portion 13, and the fourth sheet portion 14 are also formed with water stopping ridges in the same manner as the second sheet portion 12.

  At the time of attaching the joint water-stopping material 10 formed in this way to the housings 30a to 30d, as shown in the figure, the extending portion 16 is disposed at the intersection of the joint portions 29a to 29d. At the same time, the joint water-stopping material 10 is installed on the outer surfaces of the housings 30a to 30d so that each of the bent portions 17a to 17d in each sheet portion corresponds to each of the joint portions 29a to 29d. And the attachment is completed by fixing the waterproofing material 10 for joints to the housings 30a-30d using the fixing tool which is not shown in figure.

  FIG. 2 is a schematic process diagram showing a manufacturing process of the joint water-stopping material shown in FIG.

  First, with reference to (1) of FIG. 2, the sheet body 20 of the sheet-like material which has flexibility and watertightness, such as rubber | gum etc., is prepared. In this embodiment, the sheet body 20 is formed in a cross shape in plan view. However, the shape of the sheet body 20 is not particularly limited, and the sheet body 20 may be formed according to the shape of the joint portion to be attached. The body 20 may be formed in other shapes. And in the sheet | seat body 20, the strip | belt-shaped 1st area | region 21 (part shown with the dashed-two dotted line) extended in a 1st horizontal direction (upward direction in a figure) is the 1st sheet | seat body 20 orthogonal to a 1st horizontal direction. 2 is bent upward so that it can extend at least in the horizontal direction (downward direction in the figure) to obtain the state shown in FIG.

  Next, from the state of (2) in FIG. 2, a belt-like second region 22 (part indicated by a two-dot chain line) extending from approximately the center in the longitudinal direction of the first region 21 to the second direction is formed into a sheet body. 20 is bent upward so that it can extend at least in the first horizontal direction, and a part of the first region 21 in the vicinity of the connection portion between the first region 21 and the second region 22 is 1 is folded so that it can extend at least in the horizontal direction. Further, the belt-like third region 23 (portion indicated by a two-dot chain line) extending from the substantially longitudinal center of the first region 21 in the direction opposite to the second direction, the sheet body 20 extends in the first horizontal direction. The sheet body 20 extends at least in the first horizontal direction at least in part in the vicinity of the connecting portion between the first region 21 and the third region 23. Fold as you can.

  Then, as shown in FIG. 2 (3), the elongated portion 16 constituted by the central portion of the first region 21 and a part of each of the second region 22 and the third region 23 on the first region 21 side. And the first sheet part 11, the second sheet part 12, the third sheet part 13 and the fourth sheet part 14 each having one end connected to the extending part 16 and extending in a cross shape in plan view. The production of the water material 10 is completed. In addition, the part of the 1st area | region 21 in the sheet | seat body 20 respond | corresponds to the bending parts 17a and 17b of the water sealant 10 for joints, the part of the 2nd area | region 22 corresponds to the bending part 17c, and the part of the 3rd area | region 23 is. It corresponds to the bent portion 17d.

  According to such a manufacturing method, the water-stopping material for joints that can be extended in both the first horizontal direction and the second horizontal direction orthogonal to the first horizontal direction by one sheet body 20. 10 is formed, it is possible to efficiently manufacture the joint water-stopping material 10 corresponding to the cross-shaped joint portion.

  FIG. 3 is a plan view schematically showing the deformation operation of the joint water-stopping material shown in FIG.

  First, with reference to (1) of FIG. 3, the joint water-stopping material 10 is attached to the housings 30a to 30d so as to close the cross-shaped joint portions 29a to 29d. From this state, it is assumed that each of the housings 30a and 30d and each of the housings 30b and 30c move in a direction away from each other as indicated by arrows in the figure due to, for example, an earthquake.

  With reference to (2) of FIG. 3, as a result of each of the housings 30a-30d moving, the space | interval of the joint parts 29a and 29b has expanded. At this time, the bent portion 17a and the bent portion 17b can be extended in the left-right direction in the drawing by being deformed into a flat state, and the extended portion 16 can be extended in any horizontal direction. 11 and the 2nd sheet | seat part 12, and the expansion | extension part 16 absorb the change of the space | interval of the joint parts 29a and 29b.

  Here, the case where the joint portions 29a and 29b are opened has been described, but the same applies to the case where the joint portions 29c and 29d are expanded in the vertical direction from the state of (1) in FIG. That is, the bent portions 17c and 17d can be extended in the vertical direction in the figure by being deformed into a flat state, and the extended portion 16 can be extended in any horizontal direction. The 4 sheet part 14 and the expansion | extension part 16 absorb the change of the space | interval of the joint parts 29c and 29d.

  As described above, the joint water-stopping material 10 according to this embodiment can be deformed in any horizontal direction following the change in the distance between the joint portions 29a to 29d intersecting the cross shape. Even if the positions of the housings 30a to 30d are shifted due to the above, it is possible to maintain the water stopping performance of the joint portion that intersects the cross shape. Further, in the joint waterproofing material 10 according to this embodiment, the extending portion 16, the first sheet portion 11, the second sheet portion 12, the third sheet portion 13 and the fourth sheet portion 14 are integrated by one sheet body. Since it is molded, the water-stopping performance of the joint water-stopping material 10 as a whole is improved, and it is possible to efficiently stop the joints intersecting the cross shape.

  In the first embodiment described above, the cross-shaped joint portion is targeted, but the present invention can be similarly applied to a T-shaped joint portion. In this case, what is necessary is just to comprise the joint water stop material which consists of the expansion | extension part corresponding to said 1st Embodiment, and a 1st sheet | seat part, a 2nd sheet | seat part, and a 3rd sheet | seat part.

  Moreover, in said 1st Embodiment, although each sheet | seat part has a rectangular sheet shape in planar view, you may form in shapes other than a rectangle.

  Furthermore, in the first embodiment described above, the bent portion of each sheet portion is formed so as to protrude in an inverted U-shaped cross section, but each sheet portion can extend at least in a predetermined horizontal direction. If configured in this way, for example, the bent portion may be formed by bending so as to have another cross-sectional shape, or each sheet portion may be folded.

  Furthermore, in the first embodiment described above, each of the bent portions and the extending portion in each sheet portion are formed so as to protrude outward of the housing, but the joint portion of the housing is not formed. Depending on the shape, part or all of the bent portion and the extended portion may be formed so as to protrude inward of the joint portion.

  Furthermore, in the first embodiment, rubber is used as the material constituting the joint water-stopping material. However, other materials such as synthetic resin may be used as long as they have flexibility and watertightness. Or a material having the characteristics and a rubber may be combined. Further, the type of rubber is not particularly limited, and it goes without saying that either natural rubber or synthetic rubber may be used.

  Furthermore, in said 1st Embodiment, you may use the sheet | seat body by which the base material which has shape retention property, such as a mesh shape or a sheet-like metal, for example was embedded as a material for a joint water stop material.

  Furthermore, in the first embodiment described above, water is applied to the bottom surface of the concrete frame used for the reservoir and the joints of the wall surface, but the joints of the wall surface such as a concrete block for falling rocks are the target. Needless to say, it may be used to prevent intrusion of earth and sand.

  Furthermore, in the first embodiment described above, each sheet part and the extension part are integrally formed from a single sheet body. You may comprise material.

  FIG. 7 is an exploded perspective view showing an attachment state of the joint water-stopping material according to the second embodiment of the present invention, and FIG. 8 shows the joint water-stopping material 31 shown in FIG. It is the perspective view seen from the back surface side of the penetration direction.

  Referring to the drawing, four boxes 30a to 30d are arranged in a state of being abutted in a planar state, and joints 29a to 29d having a cross shape in plan view are formed by these boxes 30a to 30d.

  On the other hand, the joint water-stopping material 31 according to this embodiment is integrally formed in a cross shape in plan view using a single sheet-like material having flexibility and watertightness such as rubber. The joint water-stopping material 31 is surrounded by boundary lines 37a, 37b, 37c, and 37d as shown by a one-dot chain line in the figure, and the first horizontal direction A and the second horizontal direction orthogonal to the first horizontal direction A An extension portion 36 folded so as to be at least extendable in the horizontal direction B, a first sheet portion 32 extending from the extension portion 36 to the first horizontal direction A beyond the boundary line 37a, and a boundary line 37b. A second sheet portion 33 extending in the opposite direction to the first horizontal direction A, a third sheet portion 34 extending in the second horizontal direction B beyond the boundary line 37c, and a second sheet portion beyond the boundary line 37d. And a fourth sheet portion 35 extending in the direction opposite to the horizontal direction B. Here, each of the first sheet portion 32, the second sheet portion 33, the third sheet portion 34, the fourth sheet portion 35, and the extending portion 36 has a substantially rectangular sheet shape in plan view.

  A folding portion 38a extending outward from the boundary line 37a is formed at the center of the first sheet portion 32, and a folding portion 38b extending outward from the boundary line 37b is formed at the center of the second sheet portion 33. Is formed in the center of the third sheet portion 34, and a fold portion 38c extending outward from the boundary line 37c is formed in the center of the fourth sheet portion 35. A portion 38d is formed. Further, the folding portions 38a to 38d are connected to the outer folded portions of the extending portion 36 at the boundary lines 37a to 37d, respectively, and the outer folded portions intersect with each other. The central region and the vicinity of the extending portion 36 are folded so as to be flattened.

  Therefore, each of the first sheet portion 32 and the second sheet portion 33 can extend at least in the second horizontal direction B, and each of the third sheet portion 34 and the fourth sheet portion 35 It is possible to extend at least in one horizontal direction A, and the extending part 36 can extend in both the first horizontal direction A and the second horizontal direction B. As described above, the joint water-stopping material 31 in this embodiment can be extended in the same manner as the joint water-stopping material 10 in the first embodiment, but the shape thereof is different and the whole is almost flat. Is formed.

  Moreover, with reference to FIG. 8, the back side of the joint water stop material 31 is also formed substantially flat like the surface shown in FIG.

  Although not shown in the drawings, a pair of water stopping ridges 25a and 25b and a pair of water stopping ridges formed on the lower surface of the joint water stopping material 10 shown in FIG. 1 in the first embodiment. It is assumed that 26a and 26b are also formed in the joint water stop material 31 of FIGS. 7 and 8 in this embodiment.

  When attaching the joint water-stopping material 31 formed in this way to the boxes 30a to 30d, as shown in the figure, the extension part 36 is arranged so as to be located at the intersection of the joint parts 29a to 29d. At the same time, the joint water-stopping material 31 is installed on the outer surfaces of the boxes 30a to 30d so that each of the folding parts 38a to 38d in each sheet part corresponds to each of the joint parts 29a to 29d. And the attachment is completed by fixing the waterproof material 31 for joints to the boxes 30a-30d using the fixing tool which is not shown in figure.

  Thus, since the joint water stop material 31 of this embodiment shown in FIG.7 and FIG.8 is formed flat, when it attaches to box 30a-30d, the resistance with respect to a water flow is reduced. At the same time, it is installed in a substantially flat form even with respect to the joint portion having no groove.

  FIG. 9 is a schematic perspective view showing a manufacturing process of the joint water-stopping material 31 shown in FIG.

  First, referring to (1) of FIG. 9, a single sheet body 40 made of a sheet-shaped material having flexibility and watertightness such as rubber is prepared. In this embodiment, the shape of the sheet body 40 is formed in a cross shape in plan view. However, this shape is not particularly limited, and the sheet body 40 is formed according to the shape of the joint portion to be attached. May be formed in other shapes. Here, the sheet | seat body 40 has the rectangular area | region enclosed by the boundary lines 37a-37d shown with a dashed-dotted line in the center. This central area is an area corresponding to the expansion section 36 shown in FIG. 7 (an area where the expansion section 36 of FIG. 7 is expanded), and for convenience of explanation, this area is also referred to as the expansion section 36 here. To do. The first sheet portion 32 is connected to the extending portion 36 in the direction extending outward beyond the boundary line 37a (first horizontal direction A), and the direction extending outward beyond the boundary line 37b. The second sheet portion 33 is connected in the direction opposite to the first horizontal direction A, and the third sheet portion 34 is connected in the direction extending outward beyond the boundary line 37c (second horizontal direction B). Further, the fourth sheet portion 35 is connected in the direction extending outward beyond the boundary line 37d (the direction opposite to the second horizontal direction B).

  From this state (1), the sheet body 40 is folded into mountain folds along the mountain fold lines 47a to 47c shown by solid lines, and valley folded along the valley fold lines 48a to 48e shown by two-dot chain lines. Folded.

  Subsequently, referring to (2) of FIG. 9, the band-shaped region of the first sheet portion 32, that is, the first region 41 sandwiched between the mountain fold line 47a and the valley fold line 48a is the second horizontal direction. Folded into B. Similarly, the second region 42 sandwiched between the mountain fold line 47b and the valley fold line 48b in the second sheet portion 33 is folded in the second horizontal direction B, and the mountain fold line 47c in the third sheet portion 34. The third region 43 sandwiched between the fold line 48c and the valley fold line 48c is folded in a direction opposite to the first horizontal direction A, and is sandwiched between the mountain fold line 47d and the valley fold line 48d in the fourth sheet portion 35. The fourth region 44 thus folded is folded in a direction opposite to the first horizontal direction A. Along with these, the cross-shaped region of the extending portion 36 connected to each of the first region 41 to the fourth region 44 is also folded so as to be flattened. That is, the outer region of the cross-shaped region surrounded by the mountain fold lines 47a to 47b and the valley fold lines 48a to 48b is folded in a manner continuous with each of the first region 41 to the fourth region 44, Further, the center region of the cross-shaped region surrounded by the mountain fold line 47c and the valley fold lines 48c to 48e and the vicinity thereof are also folded so as to be flattened.

  Next, with reference to (3) of FIG. 9, in the 1st sheet | seat part 32, the 1st area | region 41 is return | folded by the 2nd horizontal direction B, and the step just before forming the folding part 38a is shown. Has been. Similarly, in the second sheet portion 33, the second region 42 is folded back in the second horizontal direction B to form a folded portion 38b, and in the third sheet portion 34, the third region 43 is in the first horizontal direction. Folded in the opposite direction of A to form a folded portion 38c, and in the fourth sheet portion 35, the fourth region 44 is folded in the direction opposite to the first horizontal direction A to form a folded portion 38d. The stage just before is shown. In this way, the first region 41 to the fourth region 44 are folded to form the folded portions 38a to 38d, and the outer region of the cross-shaped region of the extending portion 36 continuous with the folded portions 38a to 38d. And the second step of folding so as to flatten the central region and the vicinity of the cross-shaped region of the extending portion 36 folded along the mountain fold line 47c and the valley fold lines 48c to 48e. Is completed.

  According to such a manufacturing method, for one joint that can be extended in both the first horizontal direction A and the second horizontal direction B orthogonal to the first horizontal direction A by one sheet body 40. Since the water stop material 31 is formed, the joint water stop material 31 corresponding to the cross-shaped joint portion can be efficiently manufactured.

  FIG. 10 is an enlarged cross-sectional view taken along line XX shown in FIG.

  Referring to (1) of FIG. 10, the extending portion 36 is formed of a central region and a vicinity “X” folded in multiple layers, and outer regions 50 a to 50 f. Here, the outer regions 50 a to 50 c are connected to the third sheet portion 34 in a continuous manner, and the outer regions 50 d to 50 f are connected to the fourth sheet portion 35 in a continuous manner.

  In (2) of FIG. 10, the joint water-stopping material 31 is pulled away in the second horizontal direction B in which the third sheet portion 34 extends and in the direction opposite to the second horizontal direction B in which the fourth sheet portion 35 extends. The state of the extending portion 36 when the force is applied is shown. The extending portion 36 extends in two directions in which these forces are applied by extending or warping a folded portion in the central region and its vicinity “X”.

  Note that, here, the extension change in the extending direction of the third sheet portion 34 and the fourth sheet portion 35, that is, the case where the joint portions 29a and 29b are opened, the same applies to the case where the joint portions 29c and 29d are opened. It is. In this manner, the extending portion 36 is eventually expanded by extending the folded portion of the central region and its vicinity “X” so as to approach the state of the sheet body 40 shown in FIG. It is possible to extend in the horizontal direction, and it is possible to absorb the change in the interval between the joints.

  As described above, the joint water-stopping material 31 according to this embodiment is similar to the joint water-stopping material 10 shown in the first embodiment in the interval between the joint portions 29a to 29d intersecting in a cross shape. It can be deformed in any horizontal direction following the change. Moreover, since it is integrally molded by one sheet body, the water-stopping performance of the joint water-stopping material 31 as a whole is improved, and it is possible to efficiently stop the joints intersecting the cross shape. . In addition to this, in the second embodiment, unlike the first embodiment, the joint water-stopping material can be formed flat, so that protrusions due to folding can be minimized. Resistance to water flow and the like is reduced. This effect will be described below with reference to FIGS. 11 and 12.

  FIG. 11 is a cross-sectional view of the joint waterproof material 10 according to the first embodiment applied to a joint having a groove.

  Referring to the figure, for the joint portion having the groove portion 52 constituted by the boxes 30e and 30f, the bent portion 17e of the joint water-stopping material 10 shown in the first embodiment is placed in the groove portion 52. By using it so that it can be accommodated, protrusions on the surface are eliminated and flattened. However, with respect to the joint portion that does not have the groove portion 52, an inverted U-shaped bent portion has to be arranged so as to protrude on the opposite side to the joint portion, and flattening is impossible.

  FIG. 12 is a cross-sectional view in the case where the joint water-stopping material 31 of the second embodiment is applied to a joint portion having no groove.

  With reference to the figure, the joint water-stopping material 31 shown in the second embodiment is installed on the joint part composed of the boxes 30g and 30h. As described above, according to the second embodiment, even when there is no groove in the joint portion, the folding portion 38e is formed almost flat, so that the protrusion does not protrude to the surface, and resistance to water flow or the like. Is reduced.

  FIG. 13 is an exploded perspective view showing an attachment state of the joint water-stopping material 81 according to the third embodiment of the present invention. Here, the description will focus on differences from the second embodiment.

  Referring to the drawing, the joint water-stopping material 81 includes a first sheet portion 82 in the first horizontal direction A and a second sheet portion 83 in the direction opposite to the first horizontal direction A from the extending portion 86 at the center. However, the third sheet portion 84 is formed so as to extend in the second horizontal direction B, and the fourth sheet portion 85 is extended in the direction opposite to the second horizontal direction B. The joint waterproofing material 81 of this embodiment is formed entirely flat and is almost the same as the joint waterproofing material 31 shown in the second embodiment, but in the third sheet portion 84. The folding direction of the folding part 87c is different. That is, the folded portion 38c of the third sheet portion 34 in the joint waterstop material 31 of the second embodiment is folded in the direction opposite to the first horizontal direction A. The folded portion 87c of the third sheet portion 84 in the form joint waterproof material 81 is folded in the first horizontal direction A.

  Thus, according to this embodiment, the central portion of the extension portion 86 where the extension portions of the folding portion 87a of the first sheet portion 82 and the folding portion 87c of the third sheet portion 84 overlap is the second sheet. The extension part of the fold part 87b of the part 83 and the fold part 87d of the fourth sheet part 85 can be formed thinner and thinner than the other part of the center of the extension part 86 where the extension part overlaps. The resistance of the protruding portion of the water stop material is further reduced.

  The folding portion 87c of the third sheet portion 84 is folded in the direction opposite to the first horizontal direction A, and the folding portion 87b of the second sheet portion 83 is folded in the second horizontal direction B. It is also possible to obtain the same effect by thinning the overlapping portion.

  In this embodiment, the folding portion 87b of the second sheet portion 83 in FIG. 13 is folded in the direction opposite to the second horizontal direction B in order to further reduce the overlapping of the sheet bodies in the central region of the extending portion. But you can. Thereby, the center of the extending portion 86 is further flattened.

  Furthermore, since the joint water-stopping material in the second and third embodiments is formed in a flat shape on the front and back surfaces, it may be installed upside down. Here, although not shown, the extending portion 86 viewed from the back surface side in the direction penetrating the paper surface in the joint water blocking material 81 of FIG. 13 has substantially the same shape as the extending portion 36 of FIG. 8. Therefore, in this case, both the extension portion 36 and the extension portion 86 of the joint waterstop material of the second and third embodiments are in contact with the water flow or the like on the back side of the simple shape as shown in FIG. Therefore, the resistance to this water flow and the like is further reduced.

  Furthermore, in the second and third embodiments described above, when the joint water-stopping material is installed upside down, if the joint part has a groove part, a protruding part such as an extension part or a folding part Since a part or all of can fit within the groove and can be installed more flatly, resistance to water flow and the like is further reduced.

  Furthermore, in the second and third embodiments described above, the cross-shaped joint portion is targeted, but the present invention can be similarly applied to a T-shaped joint portion. In this case, it is only necessary to form a joint water-stopping material including an extending portion corresponding to the second and third embodiments, and the first sheet portion, the second sheet portion, and the third sheet portion.

  Furthermore, in the second and third embodiments, rubber is used as a material constituting the joint water-stopping material. However, as long as it has flexibility and watertightness, a synthetic resin or the like can be used. Other materials may be used, or a material having the characteristics and rubber may be combined. Further, the type of rubber is not particularly limited, and it goes without saying that either natural rubber or synthetic rubber may be used.

  Furthermore, in the second and third embodiments described above, if it can be folded as the material for the joint water-stopping material, for example, a substrate having shape retention such as a mesh or sheet metal is embedded. A sheet body may be used.

  Furthermore, in the second and third embodiments described above, it is intended to stop water at the bottom of the concrete box and the joints of the wall used for the reservoir and the like, but the joints of the wall such as a concrete block for preventing falling rocks. It goes without saying that it may be used so as to prevent intrusion of earth and sand, etc. for the part.

  Furthermore, in the second and third embodiments described above, each sheet portion and the elongated portion are integrally formed from a single sheet body, but the joints can be formed by forming and connecting them separately. A water-stopping material may be formed.

  Furthermore, in the second and third embodiments, the folded portion may be fixed with a double-sided tape or an adhesive so that the sheet body does not swell.

It is the disassembled perspective view which showed the attachment state of the water stop material for joints by 1st Embodiment of this invention. It is the schematic process drawing which showed the manufacturing process of the water stop material for joints shown in FIG. It is the top view which showed typically the deformation | transformation operation | movement of the joint water stop material shown in FIG. It is the disassembled perspective view which showed the attachment state of the conventional waterproof joint for joints. It is an expanded sectional view of the VV line shown in FIG. It is the disassembled perspective view which showed the attachment state of the water stop joint for joints used for the conventional cross-shaped joint part. It is the disassembled perspective view which showed the attachment state of the water stop material for joints by 2nd Embodiment of this invention. It is the perspective view which looked at the water stop material for joints of FIG. 7 from the back surface side of the direction which penetrates a paper surface. It is the schematic perspective view which showed the manufacturing process of the water stop material for joints of FIG. It is the expanded sectional view seen from the XX line shown in FIG. It is sectional drawing at the time of applying the water stop material for joints of 1st Embodiment to the joint part which has a groove part. It is sectional drawing at the time of applying the water stop material for joints of 2nd Embodiment to the joint part which does not have a groove part. It is the disassembled perspective view which showed the attachment state of the water stop material for joints by 3rd Embodiment of this invention.

Explanation of symbols

10, 31, 81 ... Sealing material for joints 11, 32, 82 ... First sheet part 12, 33, 83 ... Second sheet part 13, 34, 84 ... Third sheet part 14, 35, 85 ... Fourth sheet Part 16, 36, 86 ... Elongation part 17 ... Bending part 20, 40 ... Sheet body 21, 41 ... First area 22, 42 ... Second area 23, 43 ... Third area 44 ... Fourth area 29 ... Joint part 30 ... Box 37 ... Boundary lines 38, 87 ... Folding part 50 ... Outer region In addition, the same code | symbol in each figure shows the same or an equivalent part.

Claims (11)

It is a joint water-stopping material that plugs the joint parts that intersect in the frame,
An elongated portion made of a sheet-shaped material having flexibility and water tightness and folded so as to be at least stretchable in a first horizontal direction and a second horizontal direction orthogonal to the first horizontal direction; ,
It is made of a sheet-shaped material having flexibility and watertightness, and extends in the first horizontal direction, and has one end connected to the extending portion and can extend at least in the second horizontal direction. A first sheet portion;
It is made of a sheet-shaped material having flexibility and water-tightness, and extends in the direction opposite to the first horizontal direction, and has one end connected to the extension, and at least in the second horizontal direction. A second sheet portion that can be extended;
It is made of a sheet-shaped material having flexibility and watertightness, and extends in the second horizontal direction, and has one end connected to the extending portion and can at least extend in the first horizontal direction. A waterproof material for joints, comprising a third sheet portion. It is made of a sheet-shaped material having flexibility and watertightness, and extends in the direction opposite to the second horizontal direction, and one end thereof is connected to the extending portion, and the first horizontal direction The waterproof material for joints according to claim 1, further comprising a fourth sheet portion that can be extended at least. Each of the first sheet portion, the second sheet portion, the third sheet portion, and the extending portion has a substantially rectangular sheet shape in a plan view, and has a U-shaped cross section extending in the longitudinal direction at each central portion. A bent part bent to
The joint waterproofing material according to claim 1, wherein each of the first sheet portion, the second sheet portion, and the third sheet portion and the extension portion are integrally formed from a single sheet body. . Each of the first sheet portion, the second sheet portion, the third sheet portion, the fourth sheet portion, and the elongated portion has a substantially rectangular sheet shape in plan view, and each longitudinal portion has a longitudinal direction. A bent portion that is bent in a U-shaped cross section extending in the direction is formed,
The said 1st sheet | seat part, the said 2nd sheet | seat part, each of the said 3rd sheet | seat part, the said 4th sheet | seat part, and the said expansion | extension part are integrally formed from one sheet body. Water sealing material for joints. A method for producing a joint water-stopping material that closes a joint part that intersects in a frame,
A sheet body made of a material having flexibility and water tightness is prepared, and the sheet body includes a belt-like first region extending in the first horizontal direction, and the sheet body is in the first horizontal direction. A first step of flexing to extend at least in a second orthogonal horizontal direction;
The belt-like second region extending in the second horizontal direction from the first region is bent so that the sheet body can extend at least in the first horizontal direction, and the first region and the second region And a second step of folding a part of the first region in the vicinity of the connecting portion to the sheet so that the sheet body can at least extend in the first horizontal direction. . In the second step, the belt-shaped third region extending in the direction opposite to the second horizontal direction from the first region is bent so that the sheet body can at least extend in the first horizontal direction, and The method further comprises a step of folding a part of the first region in the vicinity of a connection portion between the first region and the third region so that the sheet body can at least extend in the first horizontal direction. 5. A method for producing a joint water-stopping material according to 5. Each of the first sheet portion, the second sheet portion, the third sheet portion, and the elongated portion has a substantially rectangular shape in plan view, and these are integrally formed from a single sheet body,
The first sheet portion is folded in the second horizontal direction by a strip-shaped first region extending in the longitudinal direction from the center of one side of the elongated portion,
The second sheet portion is folded in the second horizontal direction by a band-shaped second region extending in the longitudinal direction from the center of the other side of the elongated portion,
The third sheet portion is folded in a direction opposite to the first horizontal direction by a strip-shaped third region extending in the longitudinal direction from the center of the other side of the elongated portion.
The elongated portion extends outward from the center thereof, and a T-shaped region connected from the first region to each of the third regions is folded from each of the first sheet portion to the third sheet portion. The waterstop material for joints according to claim 1, wherein the outer region is folded in a manner continuous with the portion, and the central region and the vicinity thereof are folded so as to be flattened. Each of the first sheet portion, the second sheet portion, the third sheet portion, the fourth sheet portion, and the elongated portion has a substantially rectangular shape in plan view, and these are integrated from one sheet body. Formed
The first sheet portion is folded in the second horizontal direction by a strip-shaped first region extending in the longitudinal direction from the center of one side of the elongated portion,
The second sheet portion is folded in the second horizontal direction by a band-shaped second region extending in the longitudinal direction from the center of the other side of the elongated portion,
The third sheet portion is folded in a direction opposite to the first horizontal direction by a strip-shaped third region extending in the longitudinal direction from the center of the other side of the elongated portion.
In the fourth sheet portion, a belt-like fourth region extending in the longitudinal direction from the center of the other side of the extension portion is folded in a direction opposite to the first horizontal direction,
The extending portion extends outward from the center thereof, and a cross-shaped region connected to each of the first region to the fourth region is a folded portion of each of the first sheet portion to the fourth sheet portion. The waterstop material for joints according to claim 2, wherein the outer region is folded in a continuous manner, and the central region and the vicinity thereof are folded so as to be flattened. Each of the first sheet portion, the second sheet portion, the third sheet portion, the fourth sheet portion, and the elongated portion has a substantially rectangular shape in plan view, and these are integrated from one sheet body. Formed
The first sheet portion is folded in the second horizontal direction by a strip-shaped first region extending in the longitudinal direction from the center of one side of the elongated portion,
The second sheet portion is folded in the second horizontal direction by a band-shaped second region extending in the longitudinal direction from the center of the other side of the elongated portion,
The third sheet portion is folded in the first horizontal direction by a strip-shaped third region extending in the longitudinal direction from the center of the other side of the extension portion,
In the fourth sheet portion, a belt-like fourth region extending in the longitudinal direction from the center of the other side of the extension portion is folded in a direction opposite to the first horizontal direction,
The extending portion extends outward from the center thereof, and a cross-shaped region connected to each of the first region to the fourth region is a folded portion of each of the first sheet portion to the fourth sheet portion. The waterstop material for joints according to claim 2, wherein the outer region is folded in a continuous manner, and the central region and the vicinity thereof are folded so as to be flattened. A method for producing a joint water-stopping material that closes a joint part that intersects in a frame,
A sheet body made of a material having flexibility and water-tightness is prepared, and a belt-like first region extending in the first horizontal direction from the center of one side in the rectangular central portion of the sheet body and the center Folding a band-like second region extending from the center of the other side of the part in a direction opposite to the first horizontal direction so as to extend in a second horizontal direction perpendicular to the first horizontal direction, A first step of folding the belt-like third region extending in the second horizontal direction from the center of the other side of the central portion so as to extend in the first horizontal direction;
In the central portion, a T-shaped region extending outward from the center and connected to each of the first region to the third region is a folded portion of each of the first region to the third region. A method for producing a joint water-stopping material, comprising: a second step of folding the outer region in a continuous manner and flattening the central region and the vicinity thereof. A method for producing a joint water-stopping material that closes a joint part that intersects in a frame,
A sheet body made of a material having flexibility and water-tightness is prepared, and a belt-like first region extending in the first horizontal direction from the center of one side in the rectangular central portion of the sheet body and the center Folding a band-like second region extending from the center of the other side of the part in a direction opposite to the first horizontal direction so as to extend in a second horizontal direction perpendicular to the first horizontal direction, A band-shaped third region extending in the second horizontal direction from the center of the other side of the central portion, and a band-shaped third region extending in the direction opposite to the second horizontal direction from the center of the other side of the central portion. A first step of folding the fourth region so as to extend in the first horizontal direction;
A cross-shaped region extending outward from the center of the central portion and connected to each of the first region to the fourth region is continuously connected to each folded portion of the first region to the fourth region. And a second step of folding the outer region in such a manner as to flatten the central region and the vicinity thereof.

Images