Joyner

Abstract

To provide a joiner that offers excellent workability for joining adjacent boards. [Solution] A joiner 1 for joining and installing adjacent boards 100, 100, having a pair of front flanges 2A, 2B and rear flanges 3A, 3B, and having insertion parts 10A, 10B that can be inserted into the ends of adjacent boards 100, 100, and an anchor part 11 extending rearward from the insertion parts 10A, 10B.

Description

Technical Field

[0001] The present invention relates to a joiner for joining and installing boards in an adjacent state, particularly a joiner for joining and installing boards in an adjacent state used for surface repair or surface reinforcement of concrete structures.

Background Art

[0002] Concrete structures composed mainly of reinforced concrete or concrete blocks deteriorate under the influence of external forces such as earth pressure and wind pressure, and various deterioration factors in the use environment. Durability decreases due to phenomena such as the floating, peeling, and spalling of concrete and the corrosion of the reinforcing bars inside the concrete. Therefore, regular surface repair has been necessary.

[0003] Conventionally, a method using high-toughness cement boards has been known as a method for surface repair or surface reinforcement of concrete structures. Specifically, the high-toughness cement board is installed so as to cover the surface of the concrete structure, and a filler such as non-shrink mortar is filled into the gap formed between the concrete structure and the high-toughness cement board, whereby the high-toughness cement board is integrally fixed to the concrete structure. Further, since the high-toughness cement board is a dense flat plate containing high-strength resin fibers and the like with cement as the main component, it serves as a surface protection material and suppresses the intrusion of deterioration factors such as carbon dioxide, chloride ions, and moisture from the outside, thereby being able to restore or improve the durability of the concrete structure. Furthermore, the high-toughness cement board has high material strength and toughness, and can restore or improve the mechanical performance of the concrete structure.

[0004] Furthermore, as shown in Patent Document 1, when a surface repair method using high-toughness cement boards (hereinafter sometimes simply referred to as "boards") is applied to the R-shaped portion of a concrete structure such as the inner wall of an existing arch-shaped tunnel, the ends of inclined boards are brought into contact with each other, a plate-shaped backing material is placed on the back side of the boards so as to straddle the gaps between the boards, and the boards are joined together by filling the gaps between the ends of the boards and the gaps between the boards and the backing material with an adhesive that has a watertight function. In this way, by joining multiple boards while adjusting the inclination angle, multiple boards can be arranged along the R-shaped portion of the concrete structure. The backing material used is made from the same plate material as the high-toughness cement boards. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2016-37793 (pages 5-6, Figure 3) [Overview of the project] [Problems that the invention aims to solve]

[0006] However, in Patent Document 1, the backing material is used to join adjacent boards together and to prevent leakage of the filler material that fills the gap between the concrete structure and the boards. Therefore, not only is it necessary to mold the backing material and fix it to the back side of the boards, but joining adjacent boards together along the curved section of the concrete structure at the desired angle of inclination without misalignment requires extremely high precision, resulting in poor workability at the construction site.

[0007] This invention was made in view of these problems, and aims to provide a joiner that offers excellent workability for joining adjacent boards. [Means for solving the problem]

[0008] To solve the above problems, the joiner of the present invention is This is a joiner for connecting and installing adjacent boards. It has a pair of front and rear flanges, and an insertion portion that can be inserted into the end of an adjacent board, It is characterized by having an anchor portion that extends rearward from the aforementioned insertion portion. This feature allows the pair of insertion parts of the joiner to be inserted into the ends of adjacent boards, and the joint portion between adjacent boards to be covered by a front flange that is exposed on the front side. This makes it easy to position the boards at the desired inclination angle regardless of whether the boards are misaligned, and allows adjacent boards to be stably held in the desired inclination angle, resulting in excellent ease of joining adjacent boards. In addition, the anchoring effect of the anchor portion stabilizes the mounting position of the joined boards.

[0009] The front flange is characterized by being shorter than the rear flange. This feature results in a small front flange exposed on the front side of the board, giving it superior aesthetic appeal. Furthermore, it facilitates arranging adjacent boards at an angle, making it easier to position boards along an arch shape, for example.

[0010] The distance between the front flange and the rear flange is characterized by being greater than the thickness of the board. This feature makes it easy to insert the boards into the insertion section and position them so that adjacent boards are tilted relative to each other.

[0011] The anchor portion is characterized by having a flange that extends along the rear flange. This feature ensures that the anchor portion is positioned along the board inserted into the insertion portion, thus guaranteeing an effective anchoring effect.

[0012] The aforementioned joiner is characterized by having a symmetrical shape when viewed from the side. This feature means that the insertion part and the anchor part have the same shape, allowing for installation without having to consider the front and back of the joiner, resulting in excellent workability.

[0013] The joiner is characterized by being vertically symmetric in side view. According to this feature, since the respective ends of adjacent boards are inserted into the insertion portion to the same extent, adjacent boards can be stably joined.

[0014] The joiner is characterized by being in the shape of a Chinese character "Wang" in side view. According to this feature, the volume occupied by the web connecting between the flanges with respect to the entire joiner can be reduced, and a lightweight joiner can be provided.

Brief Description of the Drawings

[0015] [Figure 1] It is a perspective view showing the joiner of Example 1 according to the present invention. [Figure 2] (a) is a front view showing the joiner in Example 1, and (b) is a side view showing the same joiner. [Figure 3] (a) to (c) are diagrams showing an example of a construction procedure in the surface repair of a concrete structure using the joiner and boards in Example 1. [Figure 4] It is a cross-sectional view showing a state where boards are installed along the arch shape of a concrete structure using the joiner in Example 1. [Figure 5] It is a side view showing the joiner of Example 2 according to the present invention.

Modes for Carrying Out the Invention

[0016] Modes for carrying out the joiner according to the present invention will be described below based on examples.

Examples

[0017] The joiner according to Example 1 will be described with reference to FIGS. 1 to 4. In this example, the joiner is used for surface repair or surface reinforcement of a concrete structure having an R part such as an existing arch-shaped tunnel inner wall, and a highly tough cement board (hereinafter simply referred to as "board") is used. An example of the mode used for joining and installing in an adjacent state will be described.

[0018] As shown in FIGS. 1 and 2, the joiner 1 of this example is an extruded product of an aluminum alloy, and includes a pair of upper and lower front flanges 2A and 2B, a pair of upper and lower rear flanges 3A and 3B, a pair of upper and lower flanges 4A and 4B, a web 5 connecting between the front flanges 2A and 2B and the rear flanges 3A and 3B, and a web 6 connecting between the rear flanges 3A and 3B and the flanges 4A and 4B. It is formed in a king character shape when viewed from the side.

[0019] In addition, the joiner 1 of this example is formed in a shape that is symmetric in the front and rear when viewed from the side and symmetric in the upper and lower when viewed from the side (see particularly FIG. 2(b)). Specifically, in this example, the webs 5 and 6 are formed on the same plane, the front flanges 2A and 2B and the rear flanges 3A and 3B extend on the same plane perpendicular to the webs 5 and 6, and the flanges 4A and 4B extend on the same plane perpendicular to the webs 5 and 6. That is, the front flanges 2A and 2B, the rear flanges 3A and 3B, and the flanges 4A and 4B are in a parallel positional relationship.

[0020] In addition, in this example, the front flanges 2A and 2B, the rear flanges 3A and 3B, and the flanges 4A and 4B are formed at equal intervals in the front and rear directions.

[0021] In addition, in this example, the front flanges 2A and 2B are formed shorter in the vertical direction than the rear flanges 3A and 3B. The vertical length of the rear flanges 3A and 3B is preferably 1.2 to 2.0 times, and more preferably 1.4 to 1.6 times, the vertical length of the front flanges 2A and 2B.

[0022] Furthermore, in this embodiment, the front flanges 2A and 2B are formed to be the same length vertically as the flanges 4A and 4B.

[0023] Furthermore, as shown in Figure 2(b), the front flanges 2A and 2B, the rear flanges 3A and 3B, and the flanges 4A and 4B each have rounded ends. The ends of the front flanges 2A and 2B are rounded in an arc shape with a central angle of approximately 90° so that the rear side, i.e., the side facing the rear flanges 3A and 3B, is longer vertically than the front side. Similarly, the ends of the flanges 4A and 4B are rounded in an arc shape with a central angle of approximately 90° so that the side facing the rear flanges 3A and 3B is longer vertically.

[0024] As shown in Figures 1 and 2, the joiner 1 of this embodiment has a pair of upper and lower insertion portions 10A and 10B formed by the front flanges 2A and 2B, the rear flanges 3A and 3B, and the web 5. The insertion portions 10A and 10B are formed in a U-shape in side view, open at the top and bottom, and the ends of adjacent boards 100 and 100 (see Figures 3 and 4) can be inserted into them, respectively.

[0025] Furthermore, the front-to-back dimensions of the insertion sections 10A and 10B, that is, the distance between the front flanges 2A and 2B and the rear flanges 3A and 3B, are formed to be larger than the thickness of the board 100. Preferably, the front-to-back dimensions of the insertion sections 10A and 10B are 1.02 to 1.15 times the thickness of the board 100. This makes it possible to adjust the board 100 to a desired inclination angle within the insertion sections 10A and 10B.

[0026] Furthermore, in this embodiment, the joiner 1 has a web 6 extending behind the insertion portions 10A and 10B, and flanges 4A and 4B that form a T-shaped anchor portion 11 in side view. In this embodiment, the anchor portion 11 has flanges 4A and 4B that extend along the rear flanges 3A and 3B. The anchor portion 11 exerts its anchoring effect by being embedded in a filler material F such as non-shrink mortar (see Figure 3(c)).

[0027] Next, an example of the construction procedure for surface repair of a concrete structure using the joiner 1 of this embodiment will be explained with reference to Figure 3. For the sake of explanation, the concrete structure CS in Figure 3 represents a flat surface portion.

[0028] First, dirt and any delamination of the concrete structure CS, which is the target of surface repair, are removed, and a water absorption modifier is applied. Applying a water absorption modifier to the surface of the concrete structure CS prevents a decrease in adhesive strength caused by the absorption of moisture contained in the filler F into the concrete structure CS.

[0029] Next, as shown in Figure 3(a), an inorganic anchoring material (not shown) is injected into a hole drilled in the concrete structure CS, and then a stainless steel threaded bolt 101 is inserted and fixed in place. Then, a stainless steel nut 102 is screwed onto the threaded bolt 101 up to a predetermined position, and then a stainless steel high nut 103 is screwed onto the threaded bolt 101 for about half of its total length, so that the rear end (tip) of the high nut 103 abuts against the nut 102. Furthermore, a steel threaded bolt 104 is screwed onto the front end of the high nut 103, and then a stainless steel flat washer 105 and a butyl rubber packing 106 are inserted onto the threaded bolt 104 in that order.

[0030] Next, as shown in Figure 3(b), a threaded bolt 104 is inserted through a through hole 100a provided in the board 100, and with the back surface of the board 100 in contact with the rubber packing 106, the support structure 107 is assembled on the front side of the board 100 using the threaded bolt 104. This creates a gap G between the concrete structure CS and the board 100 for filling with the filler material F. Since a standard support structure 107 can be used, a detailed explanation is omitted.

[0031] Furthermore, when assembling the support structure 107, the rubber packing 106 is compressed between the back of the board 100 and the flat washer 105, thereby preventing the filler material F from leaking out of the through-hole 100a provided in the board 100 during filling. In addition, similar to the concrete structure CS, applying a water absorption regulator to the back of the board 100 prevents a decrease in adhesive strength due to the absorption of moisture contained in the filler material F into the board 100.

[0032] Furthermore, as shown in Figure 3(b), the vertically adjacent boards 100, 100 are joined by being inserted into a pair of upper and lower insertion sections 10A, 10B of the joiner 1. A sealant 110 (see enlarged section in Figure 4) is injected into the insertion sections 10A, 10B, and the boards 100, 100 are sealed and joined when inserted into these sections. For the sake of clarity, this is not shown in the illustration, but it goes without saying that horizontally adjacent boards 100, 100 can also be joined in a similar manner using the joiner 1, which is vertically positioned so that the insertion sections 10A, 10B are open to the left and right.

[0033] Furthermore, as shown in Figure 3(b), when adjacent boards 100, 100 are joined by the joiner 1, the anchor portion 11 of the joiner 1 is positioned to protrude into the gap G formed between the concrete structure CS and the board 100.

[0034] Next, as shown in Figure 3(c), by filling the entire gap G with filler material F and allowing it to harden, the concrete structure CS and the board 100 can be bonded together by the hardened filler material F, and the anchor portion 11 of the joiner 1 embedded in the hardened filler material F will exert an anchoring effect.

[0035] Furthermore, the boards 100, 100 inserted into the insertion sections 10A, 10B of the joiner 1 are pressed against the back surfaces of the front flanges 2A, 2B of the joiner 1 due to the pressure applied during the filling of the filler material F, thus creating a small gap between the back surfaces of the boards 100, 100 and the rear flanges 3A, 3B of the joiner 1. In this embodiment, the rear flanges 3A, 3B of the joiner 1 are formed to be longer vertically than the front flanges 2A, 2B, making it easier for a gap to form between the back surfaces of the boards 100, 100 and the rear flanges 3A, 3B. The filler material F then fills into this gap and hardens, so the tips of the rear flanges 3A, 3B embedded in the hardened filler material F also exert an anchoring effect (see enlarged section of Figure 4; the end of the board 100, the caulking agent 110, etc. are exaggerated in the enlarged section).

[0036] Finally, the support structure 107 is dismantled, and the threaded bolt 104 is removed from the tall nut 103 located behind the board 100. Then, a stainless steel flat washer 108 is placed between the bolt and the through hole 100a of the board 100, and the stainless steel bolt 109 is inserted and screwed into the tall nut 103. This prevents deterioration factors such as moisture from entering the back side of the board 100 through the through hole 100a.

[0037] Furthermore, as shown in Figure 4, by using the joiner 1 of this embodiment, even if the concrete structure CS is arch-shaped, adjacent boards 100, 100 can be positioned along the R portion of the concrete structure CS at a desired inclination angle.

[0038] More specifically, since the front-to-back dimensions of the insertion portions 10A and 10B of the joiner 1 are formed to be larger than the thickness of the board 100, as shown in the enlarged section of Figure 4, the boards 100, 100 inserted into the insertion portions 10A and 10B can be positioned along the R portion of the concrete structure CS at a desired inclination angle. In this embodiment, the board 100 can be positioned at an inclination angle of up to approximately 10° forward and up to approximately 5° backward.

[0039] As described above, in this embodiment, the ends of adjacent boards 100, 100 are inserted into the insertion portions 10A, 10B of the joiner 1, and the joint portions of adjacent boards 100, 100 are covered by front flanges 2A, 2B that are exposed on the front side. This makes it easy to position the boards 100, 100 at a desired inclination angle regardless of whether they are misaligned, and allows adjacent boards 100, 100 to be stably held in a position at the desired inclination angle, thus providing excellent ease of joining adjacent boards 100, 100. Furthermore, the anchoring effect of the anchor portion 11 stabilizes the mounting position of the joined boards 100. In addition, since processing of backing material using the boards 100 during construction is not required as in the conventional method, it offers excellent ease of assembly.

[0040] Furthermore, because the front flanges 2A and 2B are shorter than the rear flanges 3A and 3B, the amount of the front flanges 2A and 2B exposed on the front side of the board 100 is reduced, resulting in superior design aesthetics. Also, because the front flanges 2A and 2B are shorter, it is easier to arrange adjacent boards 100, 100 so that they are tilted toward the front, making it easier to position the boards 100 along an arch shape such as the R section of a concrete structure CS.

[0041] Furthermore, because the tips of the front flanges 2A and 2B are rounded, the boundary between the front flanges 2A and 2B that are exposed on the front side of the board 100 and the front surface of the board 100 can be made smooth and continuous. As a result, the front flanges 2A and 2B are less noticeable as uneven surfaces, resulting in superior design aesthetics.

[0042] Furthermore, the spacing between the front flanges 2A, 2B and the rear flanges 3A, 3B is greater than the thickness of the board 100, making it easier to insert the boards into the insertion sections 10A, 10B and position them so that adjacent boards 100, 100 are tilted relative to each other.

[0043] Furthermore, the anchor portion 11 has flanges 4A and 4B that extend along the rear flanges 3A and 3B; in other words, the rear flanges 3A and 3B and flanges 4A and 4B are parallel, so the anchor portion 11 is positioned along the boards 100 and 100 inserted into the insertion portions 10A and 10B, thus ensuring a reliable anchoring effect.

[0044] Furthermore, because the joiner 1 has a symmetrical shape when viewed from the side, the insertion parts 10A and 10B and the anchor part 11 have the same shape, allowing for installation without having to consider the front or back of the joiner 1, resulting in excellent workability.

[0045] Furthermore, because the joiner 1 has a vertically symmetrical shape when viewed from the side, the respective ends of adjacent boards 100, 100 are inserted into the insertion parts 10A, 10B to the same extent, thus enabling stable joining of adjacent boards 100, 100.

[0046] Furthermore, because the joiner 1 has a king-shaped form when viewed from the side, the volume occupied by the webs 5 and 6 connecting the front flanges 2A and 2B, the rear flanges 3A and 3B, and the flanges 4A and 4B relative to the entire joiner 1 can be reduced, thus providing a lightweight joiner 1. [Examples]

[0047] Next, the joiner according to Example 2 will be described with reference to Figure 5. Note that descriptions of configurations that are identical to those in Example 1 and therefore redundant will be omitted.

[0048] As shown in Figure 5, in this embodiment, the joiner 201 has front flanges 202A, 202B, rear flanges 203A, 203B, and flanges 204A, 204B formed to be the same length vertically.

[0049] According to this, the adjustment range for the tilt angle of the board 100 inserted into the insertion sections 210A and 210B toward the front and rear can be made to be approximately the same.

[0050] Furthermore, the lengths of the front flange, rear flange, and flanges in the joiner are not limited to the configurations of Examples 1 and 2 above, but can be freely configured. For example, the flange constituting the anchor portion may be made longer than the front flange and rear flange constituting the insertion portion to enhance the anchoring effect of the anchor portion.

[0051] Although embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and any changes or additions that do not depart from the spirit of the present invention are also included.

[0052] For example, in the above embodiment, it was described that the front flange, rear flange, and flange are formed at equal intervals in the front-rear direction, but this is not limited to this, and the distance between the front flange and the rear flange and the distance between the rear flange and the flange may be different. For example, by changing the distance between the front flange and the rear flange, that is, the front-rear dimension of the insertion part, the adjustment range of the inclination angle of the board inserted into the insertion part can be changed.

[0053] Furthermore, although the above embodiment was described as having the front flange, rear flange, and flange formed perpendicular to the web, the invention is not limited to this, and the front flange, rear flange, and flange may be formed inclined with respect to the web. In this way, adjacent boards can be joined together by crossing them.

[0054] Furthermore, although the above embodiment described the anchor portion as being formed in a T-shape in side view by a flange extending along the rear flange and a web, the shape of the anchor portion is not limited to this, and can be freely configured. For example, it may be formed as an anchor portion with a Y-shape in side view where the flange is inclined relative to the web, or as an anchor portion with a curved flange.

[0055] Furthermore, although the above embodiment was described as having one anchor portion formed on the joiner, the invention is not limited to this, and multiple anchor portions may be formed.

[0056] Furthermore, in the above embodiment, the joiner was described as having a vertically symmetrical shape in a side view, that is, the front flange, rear flange, and flange each being formed to be the same length vertically. However, the invention is not limited to this, and the vertical lengths of the front flange, rear flange, and flange may be different.

[0057] Furthermore, while the above embodiment described an embodiment in which the joiner is used to join and install adjacent boards to an R-shaped portion of a concrete structure such as the inner wall of an arched tunnel, the joiner is not limited to this, and may also be used to join and install boards in a planar manner to a flat portion of a concrete structure. Moreover, it goes without saying that the structure on which the boards are installed is not limited to a concrete structure.

[0058] Furthermore, although the above embodiment described an example in which the joiner is used for surface repair or surface reinforcement of the inner wall of a tunnel, it is not limited to this and may also be used for joining and installing construction boats to the surface of a building. [Explanation of symbols]

[0059] 1. Joyner 2A, 2B Front flange 3A, 3B Rear flange 4A, 4B flange 5,6 Web 10A, 10B Insertion section 11 Anchor section 100 boards 100a Through hole 101 fully threaded bolt 102 Nut 103 High Nut 104 fully threaded bolt 105 Flat Washer 106 Rubber gasket 107 Shoring 108 Flat Washer 109 volts 110 Caulking agent CS Concrete Structures F Filling material G Gap

Claims

1. This is a joiner for connecting and installing adjacent boards. It has a pair of front and rear flanges, and an insertion portion that can be inserted into the end of an adjacent board, A joiner characterized by having an anchor portion extending rearward from the aforementioned insertion portion.

2. The joiner according to claim 1, characterized in that the front flange is shorter than the rear flange.

3. The joiner according to claim 2, characterized in that the distance between the front flange and the rear flange is greater than the thickness of the board.

4. The joiner according to claim 1, characterized in that the anchor portion has a flange extending along the rear flange.

5. The joiner according to claim 1, characterized in that the joiner has a front-to-back symmetrical shape when viewed from the side.

6. The joiner according to claim 1, characterized in that the joiner has a vertically symmetrical shape when viewed from the side.

7. The joiner according to claim 1, characterized in that the joiner has a royal letter shape when viewed from the side.

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