JP3020965U - Joint structure - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a joint structure having a cushioning material filled in joints of a concrete layer and a member for shielding an opening of the joint, and to construct a joint structure in which the concrete layer is divided into a plurality of parts, the temperature and humidity are Even if the concrete layer expands or contracts due to the change of, the member that shields the opening of the joint will not be damaged. SOLUTION: A joint structure that divides a concrete layer into a plurality of portions is provided with a cushioning material 4 filled in a joint portion of the concrete layer, a crown material 5 fitted to one end of the cushioning material 4, and a cushioning material 4.
And a supporting member 6 that is fitted to the other end of the crown member 5. The movable members 7 and 7 are formed on both outer side surfaces of the crown member 5, respectively, and the tips of the movable members 7 and 7 are adjacent to each other. Layer 2,
The movable pieces 7, 7 are configured to be opened and closed with respect to the cushioning material 4 according to the expansion and contraction of the concrete layers 2, 2.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a joint structure as a partitioning section that divides the concrete layer into a plurality of portions in order to prevent cracks in the concrete layer caused by expansion and contraction of the concrete layer.

[0002]

[Prior art]

 When forming a waterproof layer on the rooftop of a building, it is necessary to form a concrete layer as a protective layer on the upper surface of the waterproof layer in order to protect the waterproof layer from the sun, wind and rain. Then, it is necessary to form joints in the concrete layer to divide the concrete layer into a plurality of sections. In other words, the concrete layer expands and contracts slightly depending on changes in temperature and humidity, so if the concrete layer is formed over a wide area without joints, the concrete layer will crack.

FIG. 4 is a partially cutaway perspective view showing a roof portion of a building. In the figure, 1 is a building frame, 11 is a waterproof layer formed on the upper surface of the building 1, and 2 is a concrete layer formed on the upper surface of the waterproof layer 11 to protect the waterproof layer 11. Further, 3 is a joint member as a partitioning section that divides the concrete layer, and the joint member shown in the figure partitions the concrete layer 2 at equal intervals in the vertical and horizontal directions to divide the concrete layer 2 into a plurality of sections.

FIG. 5 is a sectional view showing the joint member shown in FIG. 4. Next, the structure of the joint member will be described. In FIG. 5, 4 is a cushioning material filled between the adjacent concrete layers 2 and 2, and this cushioning material is formed of a member having an appropriate elasticity, and the arrow A indicates that the temperature or humidity changes. It is possible to prevent the formation of voids between the adjacent concrete layers 2 and 2 by appropriately changing the width depending on the concrete layers 2 and 2 that expand and contract in the directions shown in FIG. Further, 6 is a support member, and this support member 6 is provided with a holding portion 6a fitted to the lower end of the cushioning material 4 and a fixing portion 6b fixed to the upper surface of the waterproof layer 11 by a predetermined means. The material 4 can be supported so as to stand on the upper surface of the waterproof layer 11.

On the other hand, 10 is a protective member made of a resin material or the like, and this protective member 10 has a U-shaped inner wall fitted to the upper end of the cushioning member 4 so as to sandwich the upper portion of the cushioning member 4. Therefore, it can be attached to the cushioning material 4. Then, on both sides of the protective member 10, there are provided claw portions 10a protruding toward the adjacent concrete layers 2.

To form a concrete layer including the joint member 3, first, the support member 6 is fixed to a predetermined position of the waterproof layer 11, and then the cushioning member 4 is attached to the support member 6. Then, the protection member 10 is attached to the upper end of the cushioning material 4, and concrete is driven into the upper surface of the waterproof layer 11 between the joint members 3 until the height is almost the same as the top of the protection member 10. Then, when the concrete layer 2 is hardened, the claw portions 10a of the protective member 10 are embedded in the adjacent concrete layers 2, and the claw portions 10a of the protective member 10 engage with the concrete layer 2.

The protective member 10 is reciprocally moved as shown by arrows in both side portions having a claw portion 10a connected to the concrete layer 2 according to expansion and contraction of the concrete layer 2 due to changes in temperature and humidity. By opening and closing both sides of the joint, it is possible to constantly shield the opening of the joint and prevent rainwater, dust and the like from entering the joint.

[0008]

[Problems to be solved by the device]

 However, the conventional joint member 3 shown in FIG. 5 has the following problems. That is, due to changes in temperature and humidity, the concrete layer will continue to expand and contract for a long period of time. Accordingly, both sides of the protective member are forcibly driven by the expansion and contraction of the concrete layer, and the reciprocating motion is repeated. However, since both sides of the protective member have not been appropriately dealt with in anticipation of such movement, material fatigue occurs due to the above-described repetitive operation, and eventually there is a possibility of damage. When the protective member is damaged, rainwater, dust, and the like enter the joints, and the concrete layer lacks the function as a protective layer, resulting in the inconvenience of reducing the durability of the entire structure.

[0009]

[Means for Solving the Problems]

 According to this invention, a joint structure that divides a concrete layer into a plurality of parts is fitted with a cushioning material that fills the joint portion of the concrete layer, a crown material that is fitted to one end of this cushioning material, and another end of the cushioning material. And a supporting member to be fitted, and movable pieces are formed on both outer side surfaces of the crown member respectively, and the tip of the movable piece is engaged with each adjacent concrete to form a concrete layer. These movable pieces are configured to open and close with respect to the cushioning material according to expansion and contraction. Another object of the present invention is to solve the above-mentioned conventional problems by forming the movable piece with an elastic material to have a cross-section Π shape and fitting the movable piece to the crown material.

[0010]

[Example of device]

 An embodiment of the present invention will be described with reference to the drawings. 1 and 3 are views showing an embodiment of the present invention. 1 is an exploded perspective view of the joint structure, and FIG. 2 is a sectional view of the joint structure shown in FIG. In the figure, 4 is a cushioning material filled between the adjacent concrete layers 2 and 2. This cushioning material is formed of a member having appropriate elasticity, and the arrow A indicates that the temperature or humidity changes. It is possible to prevent a gap from being generated between the adjacent concrete layers 2 and 2 by appropriately changing the width according to the concrete layers 2 and 2 that expand and contract in the directions shown in FIG. Further, 6 is a support member, and this support member 6 is provided with a holding portion 6a fitted to the lower end of the cushioning material 4 and a fixing portion 6b fixed to the upper surface of the waterproof layer 11 by a predetermined means. The material 4 can be supported so as to stand on the upper surface of the waterproof layer 11.

On the other hand, 5 is a crown member fitted to the upper end of the cushioning member 4, and this crown member 5 can be attached to the cushioning member 4 so as to sandwich the upper end of the cushioning member 4. FIG. 3 is a cross-sectional view showing this crown material 5. Next, the crown material 5 will be explained based on FIG. In FIG. 3, 7 and 7 are movable pieces. The movable pieces 7 and 7 may be provided with a structure that engages with the concrete layers in contact with each other, and can be opened and closed with respect to the cushioning material 4 with ease as the concrete layers expand and contract. Then, it has the following configurations and operations, and will be sequentially described according to the description of the crown member 5.

That is, in this embodiment, the crown member 5 is formed by the first crown member 8 and the second crown member 9. (See FIG. 1) The first crown member 8 is made of a resin material having a Π-shaped cross section, and can be attached to the cushioning member 4 so as to sandwich the upper end of the cushioning member 4. Then, at both corners of the upper end of the first crown member 8, semi-cylindrical protrusions 8a that horizontally protrude are provided. Further, the second crown member 9 comprises the movable pieces 7, 7 and an interposition part for connecting them, and in this embodiment, a high molecular substance showing a high elastic modulus and tensile strength, It is made of resin or synthetic rubber, which is a type of so-called elastomer, and has a Π-shaped cross section. The second crown member 9 can be attached to the first crown member 8 so as to sandwich the first crown member 8, and the groove portions 9a that fit with the protruding portions 8a of the first crown member 8 are formed at both corners of the inner wall. Be prepared for the department. In this embodiment, the second crown material 9 is made of the above-mentioned synthetic rubber so as to have a cross-section Π shape. However, the intervening portion of the second crown material 9 is made of a resin material, and both ends of the interposing portion are formed. Alternatively, the movable pieces 7, 7 made of resin or synthetic rubber may be adhered by a predetermined means to form the second crown member.

Then, the movable pieces 7, 7 of the second crown member 9 attached to the first crown member 8 have their leading end portions centered on the intervening portion at the upper end as shown by the arrows in FIG. It can be opened and closed so as to freely come into contact with and separate from the side surface of the crown member 8. Even when the movable pieces 7, 7 of the second crown member 9 move outward (open direction), the protrusion 8a of the first crown member 8 and the groove 9a of the second crown member 9 are Since they are fitted, the second crown member 9 does not come off from the first crown member 8. Further, hook-shaped claw portions 7a 1 and 7a 2 are provided at the tip ends of the movable pieces 7 7 so that the widths in the vertical direction become wider as they move toward the adjacent concrete layers 2 2 respectively.

In order to form a concrete layer having this joint structure, first, the support member 6 is fixed to a predetermined position of the waterproof layer 11, and the cushioning member 4 is attached to the support member 6. Next, a crown material 5 is attached to the upper end of the cushioning material 4, and concrete is driven into the upper surface of the waterproof layer 11 between the joint structures until the height is almost the same as the top of the crown material 5. When the concrete layer 2 is hardened, the claw portions 7a, 7a of the movable pieces 7, 7 included in the second crown material 9 of the crown material 5 are embedded in the adjacent concrete layers 2, 2, respectively. The claw portion 7a of is engaged with the concrete layer 2.

In this joint structure, even if the concrete layer repeatedly expands and contracts over a long period of time due to changes in temperature and humidity, there is no problem. That is, even if the concrete layer repeatedly expands and contracts over a long period of time, since the movable pieces 7 and 7 of the joint structure are formed of the elastic material having extremely high flexibility as described above, 7 is naturally driven by repeated expansion and contraction of the concrete layer, and easily opens and closes between the concrete layer 2 and the outer surface of the first crown member 8. Therefore, the movable pieces 7, 7 are sufficiently adaptable to the repeated expansion and contraction of the concrete layer for a long period of time and are not damaged.

[0016]

[Effect of device]

 As described above, the present invention provides a cushioning material that fills the joint portion of the concrete layer with a joint structure as a partition that divides the concrete layer into a plurality, and a crown material that is fitted to one end of the cushioning material. And a supporting member that fits into the other end of the cushioning material. Movable pieces are formed on both outer surfaces of the crown material, and the tip of the movable piece is engaged with each adjacent concrete. Since these movable pieces are configured to open and close with respect to the cushioning material in accordance with the expansion and contraction of the concrete layer, the movable pieces are made of elastic material to have a cross-section Π shape and fitted to the crown material. Since it is configured, even if the concrete layer repeats expansion and contraction over a long period of time due to changes in temperature and humidity, the movable piece of the joint structure naturally follows the repeated expansion and contraction of the concrete layer and opens and closes easily. Can be , Always does not hinder such as is possible damage to maintain its adaptability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a joint structure according to the present invention.

FIG. 2 is a cross-sectional view of the joint structure shown in FIG.

FIG. 3 is a cross-sectional view showing a joint member having a joint structure shown in FIG.

FIG. 4 is a partially cutaway perspective view showing a concrete layer formed on the roof of a building.

FIG. 5 is a cross-sectional view showing a conventional joint member.

[Explanation of symbols]

 2 Concrete layer (protective layer) 4 Cushioning material 5 Crown material 6 Supporting member 7 Movable piece 11 Waterproof layer

Claims (2)

[Scope of utility model registration request] 1. A joint structure as a partitioning section that divides a concrete layer into a plurality of parts, wherein a cushioning material filled in the joint portion of the concrete layer and a crown material fitted to one end of the cushioning material. It is composed of a support member fitted to the other end of the cushioning material, and movable pieces are formed on both outer side surfaces of the crown member, and the tip of the movable piece is engaged with each adjacent concrete, A joint structure characterized in that these movable pieces are opened and closed with respect to the cushioning material in accordance with expansion and contraction. 2. The joint structure according to claim 1, wherein the movable piece is made of an elastic material and has a cross-section Π shape, and is fitted to the crown material.