Joint support

Abstract

To provide a joint material support that has reliable fixation to both the ground and joint material, contributes to improving work efficiency and shortening construction time, and can improve work reliability. [Solution] The joint support device 1 is configured with a plate-shaped base 2 that is placed on the ground, and a support row 3 that is erected on the base and supports the joint material in an upright position. The base is provided with fixing holes 4 for driving fixed piles into the ground, and the support rows are formed into a first support row 31 and a second support row 32 that are oriented in different directions, and the first support row and second support row are arranged so that they intersect, and this configuration temporarily fixes the joint material that intersects in two directions.

Description

[Technical Field]

[0001] This invention relates to a joint support tool for temporarily fixing a joint material to the ground when pouring concrete into the ground. [Background technology]

[0002] BACKGROUND ART Conventionally, when concrete (so-called concrete floor) is poured onto the ground, a joint material has been used to prevent cracks and the like in the concrete. After construction, the finished concrete floor may crack due to drying or thermal expansion and contraction, but by using this joint material, the concrete floor can be divided into smaller sections, preventing cracks or preventing their expansion. In particular, the joint material known as formed expansion joint material has the property of expanding and contracting itself, allowing it to flexibly respond to the expansion and contraction of the concrete, preventing and suppressing cracks in the concrete.

[0003] The joint material is temporarily fixed to the ground before the concrete is poured, and mortar is used as the temporary fixing method. Specifically, after the joint material is laid out on the ground, mortar is piled on one or both sides of the joint material to temporarily fix it to the ground. This temporary fixing method using mortar has the problem that it takes time and effort to mix and apply the mortar on-site.Furthermore, since concrete cannot be poured until the mortar has dried after application, concrete must be poured the day after the temporary fixing of the joint material, which results in a longer construction period.

[0004] In order to solve these problems, the technology described in Patent Document 1 has been proposed. The technology described in Patent Document 1 is "a joint member for formwork joint material having a tubular portion, a plurality of slits provided in the tubular portion along the axial direction from one end to the other end so that a formwork joint material can be inserted from one end of the tubular portion, a base plate provided at the other end of the tubular portion, and fixing means for fixing the base plate to the floor subfloor."

[0005] According to the technology described in Patent Document 1, it is not necessary to use mortar to temporarily fix the joint material, and work efficiency can be improved and construction time can be shortened compared to conventional methods.

[0006] However, the technology described in Patent Document 1 does not provide sufficient fixation between the joint member and the ground, and further between the joint member and the joint material, which causes problems such as the joint member coming off the ground and moving unintentionally when pouring concrete, and the joint material falling off the joint member. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2011-74565 Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, the object of this invention is to provide a joint support device for temporarily fixing a joint material to the ground when pouring concrete onto the ground, which has reliable fixation to both the ground and the joint material, contributing to improving work efficiency and shortening construction time, as well as improving the reliability of the work. [Means for solving the problem]

[0009] The above object of the present invention is achieved by the following means.

[0010] 1. A support for temporarily fixing a joint material to the ground when pouring concrete into the ground. a plate-shaped base portion placed on the ground; A support row is provided on the base to support the joint material in an upright state, The base is provided with fixing holes for driving fixing stakes into the ground. The support column is provided perpendicular to the base, The support row is configured such that a first support row and a second support row are formed in different directions, and the first support row and the second support row intersect with each other; With these configurations, the joint support is characterized by being able to temporarily fix joint materials that intersect in two directions.

[0011] 2. A joint support device according to claim 1, characterized in that the support row is formed by two support walls, and the joint material is sandwiched and erected between these two support walls.

[0012] 3. The joint support device according to claim 2, wherein the support walls of either the first support row or the second support row or both have an inwardly curved shape.

[0013] 4. The support walls of either or both of the first support row or the second support row are configured with an upper portion having a notch and a lower portion not having a notch; 4. The joint support according to claim 2 or 3, wherein an upper portion of the support wall is curved inward.

[0014] 5. The base is divided by a first support row and a second support row to form four divided bases; 3. The joint support according to claim 1, wherein a plurality of fixing holes are provided for each of the divided base portions.

[0015] 6. A joint support device as described in claim 5, characterized in that the fixing holes provided for each divided base portion are configured so that two or more are provided vertically and two or more are provided horizontally. [Effects of the Invention]

[0016] According to the above-mentioned invention 1, the plate-shaped base that is placed on the ground is provided with fixing holes for driving fixed piles into the ground, and by using these fixing holes to drive the fixed piles into the ground, the joint support can be securely fixed to the ground.

[0017] In addition, the support rows for supporting the joint material in an upright position are erected perpendicular to the base, with the first support row and the second support row formed in different directions, and the first support row and the second support row arranged to intersect, so that the joint material that intersects in two directions can be securely fixed to the joint material support.

[0018] These two main configurations ensure that when pouring concrete into the ground, the joint support has a secure fixation to both the ground and the joint, allowing the joint to be securely fixed to the ground in a designated position.

[0019] These effects contribute to improving work efficiency and shortening construction time when installing joint material and pouring concrete for the floor, and also prevent unintended movement or falling off of joint material, thereby improving the reliability of the work.

[0020] According to the above-mentioned second invention, the support row is formed by two support walls, and the joint material is sandwiched and erected between these two support walls, so the joint material can be temporarily fixed by the simple task of inserting it into the support row of the joint material support. In addition, the joint material can be fixed perpendicular to the ground.

[0021] According to the third aspect, the support wall is curved inward, so the inserted joint material curves and contacts the protruding part of the support wall, preventing it from falling out upward or moving horizontally. In other words, the joint material can be securely fixed to the joint material support.

[0022] According to the fourth invention, instead of a structure in which only the upper part of the support wall with the notch is curved inward, the provision of the notch gives flexibility to the upper part of the support wall, allowing the support wall to be slightly expanded outward, which makes it easier to insert the joint material and improves work efficiency. Also, when it is necessary to remove the joint material once it has been installed, the work can be easily done by slightly expanding the support wall outward.

[0023] According to the fifth aspect, the base is divided into four divided bases by the first and second support rows, and each divided base has multiple fixing holes. This allows multiple fixing posts to be used for one joint support, and fixing posts can be used at the four corners, so the joint support can be more securely fixed to the ground. This prevents the joint support and the joint material installed thereon from moving or falling off even when subjected to external forces from the flowing concrete during concrete pouring.

[0024] According to the above-mentioned invention 6, the structure has two or more fixing holes arranged vertically and two or more fixing holes arranged horizontally, so that the fixing holes to be used for driving the fixed piles can be selected depending on the condition of the ground.

[0025] This is explained in more detail below. The ground where the concrete floor is to be poured may contain hard objects such as stones, making it difficult to drive the fixing piles into these hard objects. For this reason, it is preferable to be able to select a location for driving the fixing piles that is easy to do depending on the ground conditions. Therefore, the configuration of the sixth invention above allows the joint support to be easily and securely fixed to the ground. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a perspective view showing one embodiment of a joint support tool according to the present invention; [Figure 2] 1A and 1B are plan, front, and side views showing one embodiment of a joint support tool according to the present invention; [Figure 3] A schematic diagram showing how to use the fixing holes 4 and fixing piles 5 depending on the ground conditions. [Figure 4] Schematic diagram showing an example of the installation of the joint support device according to the present invention. [Figure 5] FIG. 10 is a schematic plan view showing another embodiment of the joint support device according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is an oblique view showing one embodiment of a joint support device (hereinafter simply referred to as a "joint support device") 1 according to the present invention, and FIG. 2 is a plan view, a front view, and a side view showing one embodiment of the joint support device 1.

[0028] 1 and 2, the joint material support 1 is composed of a plate-shaped base 2 and a support row 3. The base 2 is provided with fixing holes 4, and the support row 3 is composed of a first support row 31 and a second support row 32 that are oriented in different directions.

[0029] First, the configuration of the base 2 will be described. The base 2 is a plate-like member that is placed on the ground G where the concrete floor is to be poured. In Fig. 1 and other figures, it is depicted as a rectangle with rounded corners, but the shape is not limited to this. This base 2 is configured to be divided into four parts by providing support rows 3 (see FIGS. 1 and 2) which will be described later, and in this specification, each divided part of the base 2 is referred to as a divided base part 21.

[0030] Next, the configuration of the support row 3 will be described. The support row 3 is a member that stands on the upper surface of the base 2 and supports the joint material E in an upright position. In other words, it is a member that has two long plate-like members arranged side by side and has a groove formed therein for inserting the joint material E.

[0031] 1 and 2, two support rows 3 are provided for one joint material support 1. These two support rows 3 are referred to as a first support row 31 and a second support row 32. The first support row 31 and the second support row 32 are arranged in different directions on the base 2, and further, the first support row 31 and the second support row 32 are arranged in a crossing manner on the base 2.

[0032] 1 and 2, the support row 3 is depicted as being linear, but it may be curved or have other linear shapes. Also, in FIGS. 1 and 2, the first support row 31 and the second support row 32 are depicted as being perpendicular to each other, but they may intersect at other angles. This will be described in more detail below with reference to FIG. 5.

[0033] 1 and 2, the support row 3 is formed by two support walls 33, and is configured to sandwich and erect the joint material E between these two support walls 33. The two support walls 33 are arranged side by side with a dimension corresponding to the width of the joint material E.

[0034] As shown in the figure, it is preferable that no support wall 33 is provided at the intersection between the first support row 31 and the second support row 32. This is because the support wall 33 becomes an obstacle when the connector is inserted (see FIG. 4 described later).

[0035] 1 and 2, the support wall 33 is preferably composed of two parts: an upper part 33a having a cutout 34, and a lower part 33b without a cutout. With this configuration, the provision of the cutout 34 makes the upper part 33a of the support wall flexible, allowing the support wall 33 to expand slightly outward, which makes it easier to insert the joint material E and improves work efficiency.

[0036] Furthermore, in the illustrated embodiment, the first support row 31 has a two-part structure consisting of an upper part 33a and a lower part 33b, but the present invention is not limited to this form, and the support wall 33 of either or both of the first support row 31 or the second support row 32 may have a two-part structure consisting of an upper part 33a and a lower part 33b.

[0037] 2, it is preferable that at least a portion of the support wall 33 has a shape that curves inward. With this configuration, at least a portion of the support wall 33 has a shape that curves inward of the support row 3, so that the joint material E inserted therein comes into contact with the curved portion 35 (more specifically, the portion that protrudes inward of the curved support wall 33), preventing it from slipping out upward and from moving horizontally (in the longitudinal direction of the support row 3).

[0038] 2 shows an aspect in which the curved portion 35 is provided on the upper portion 33a of the support wall 33, but there is no limitation on the range in which the curved portion 35 is provided. For example, the curved portion 35 may be provided on the entire support wall 33 (upper portion 33a and lower portion 33b), or may be provided on only a portion of the upper portion 33a of the support wall 33. Furthermore, in the illustrated embodiment, the curved portion 35 is provided in the first support row 31, but the present invention is not limited to this embodiment, and the curved portion 35 can be provided in the support wall 33 of either or both of the first support row 31 or the second support row 32.

[0039] Next, the configuration of the fixing hole 4 will be described. The fixing hole 4 is an opening provided for driving a fixing stake 5 from the upper surface of the base 2 into the ground.

[0040] As shown in FIGS. 1 and 2, the fixing holes 4 are provided by providing openings from the upper surface to the lower surface of the base 2. There is no limitation on the shape and size of the fixing hole 4. It can be determined appropriately depending on the shape and dimensions of the fixing pile 5 to be used.

[0041] It is preferable to provide a plurality of fixing holes 4. This is because a plurality of fixing stakes 5 can be used, and the fixation between the joint support 1 and the ground G can be improved. Furthermore, it is preferable that a plurality of fixing holes 4 are provided for each divided base portion 21. With this configuration, a plurality of fixing piles 5 can be used for one joint material support 1, and fixing piles 5 can be used for each of the four corners, so that the joint material support 1 can be reliably fixed to the ground G.

[0042] 1 and 2, it is preferable that the multiple fixing holes 4 provided for each divided base 21 are configured so that two or more are provided vertically and two or more are provided horizontally (see the plan view in particular in FIG. 2). With this configuration, it is possible to select the fixing holes 4 to be used for driving the fixing piles 5 depending on the conditions of the ground G.

[0043] The above items will be explained with reference to FIG. Hard objects S, such as stones, may be present on the ground G where the concrete floor is to be poured. Driving the fixing piles 5 into these hard objects S is difficult and dangerous, and may lead to damage to the fixing piles 5. For this reason, it is preferable to be able to select a location for driving the fixing piles 5 that is easy to drive depending on the condition of the ground G.

[0044] FIG. 3(a) is a schematic explanatory diagram showing how to use the fixing holes 4 and fixing piles 5 depending on the ground conditions, and is a plan view of a part of the joint material support 1. As shown in this figure, a hard object S such as a stone may fall below the base 2 (split base 21) of the joint support 1, and the fixing hole 4 at the top of this hard object S is unsuitable for driving the fixing hole 5 (marked as "unsuitable" in Figure 3(a)). On the other hand, if there is no obstacle such as a hard object S below, the fixing hole 4 at the top is suitable for driving the fixing pile 5 (marked as "suitable" in Figure 3(a)).

[0045] If the multiple fixing holes 4 provided in the divided base 21 are configured so that two or more are provided vertically and two or more are provided horizontally, even if a hard object S falls below one of the fixing holes 4, it is possible to select another fixing hole 4 and drive in a fixing pile 5.

[0046] Next, the fixed pile 5 will be described. There are no limitations on the detailed configuration of the fixing pile 5, as long as it is configured to be able to fix the joint material support 1 to the ground G through the fixing hole 4. For example, any known and commonly used pile, such as a pile called a peg, can be used without any particular limitations.

[0047] As shown in FIG. 3(b), the fixing pile 5 is preferably U-shaped and has two rod-shaped portions 51 that are driven into the ground G. With this configuration, the fixing pile 5 can be driven using two of the fixing holes 4 provided in the base 2, thereby improving the fixation between the base 2 and the ground G. In addition, the head portion 52 connecting the two rod-shaped portions 51 is located above the base 2 and bridges the two fixing holes 4, thereby improving the fixation between the joint material support 1 and the ground.

[0048] Next, examples of materials that can be used to form the joint material support 1 will be described. The joint support 1 can be formed by injection molding or other means using synthetic resin as the material. There are no limitations on the material used, but for example, high impact polystyrene (also known as high impact polystyrene, HIPS, etc.) can be used.

[0049] In addition, by roughening or unevenly processing (not shown) the support wall 33 (especially the inside of the support row 3) of the joint material support device 1, it is possible to prevent the inserted joint material E from moving or falling off.

[0050] Next, a construction method for the joint material support 1 will be described with reference to Fig. 4. Note that this construction method is an example, and the contents of the present invention are not limited to this. There are two possible methods for constructing joints in concrete floors: installing expansion joint material before pouring the concrete, or making cuts with a joint cutter after pouring.This invention uses the former method.

[0051] First, based on the plan and design for the concrete floor, the positions where the joint material will be installed are marked using thread or the like. Next, the joint material supports 1 are placed on the marked line at predetermined intervals. There are no limitations on the placement intervals, but it is preferable to place them at intervals of 1 m or 1.5 m, for example. Furthermore, when installing joint materials in a grid pattern, the joint material support 1 is placed at the position where two joint materials intersect. The joint material support 1 can be used when two joint materials intersect in a cross shape or when they intersect in a T shape. Furthermore, even if the joint materials are not at an intersection, one joint material can be fixed using either the first support row 31 or the second support row 32 of the joint material support 1.

[0052] Next, after the position for installing the joint material support 1 has been determined, the joint material support 1 is temporarily fixed to the ground G using a fixing stake 5. Specifically, the joint material support 1 is placed in a predetermined position, the rod-shaped portion 51 of the fixing stake 5 is inserted into the fixing hole 4, and the head portion 52 is struck downward using a hammer or the like, thereby driving the fixing stake 5 into the ground G. As a result, the joint material support 1 is temporarily fixed to the ground G at a predetermined position.

[0053] Next, the joint material E is inserted into the support row 3 of the fixed joint material support 1 to fix it. By repeating these steps and installing the joint material in all positions specified by the plan and design, the joint material installation work is completed.

[0054] Concrete can be poured immediately after the installation of the joint support 1. In conventional joint installation work using mortar, concrete had to be poured the day after the joint was installed in order to wait for the mortar to dry, but with the installation method using the joint support 1 of this invention, concrete can be poured immediately after the joint is installed.

[0055] Finally, another embodiment of the joint material support 1 will be described with reference to FIG. As described above, there are no limitations on the angle at which the two support rows 3 intersect, the shape of the base of the joint material support 1, the shape of the support rows 3, etc.

[0056] FIG. 5(a) shows an embodiment in which the angle at the position where two support rows 3 intersect is changed. In Figures 1 and 2, the two support rows 3 (first support row 31 and second support row 32) are drawn perpendicular to each other, but as shown in Figure 5(a), a configuration in which they intersect at another angle can also be adopted.

[0057] FIG. 5(b) shows an embodiment in which the shape of the base 2 is modified. 1 and 2, the shape is depicted as a rectangle with rounded corners, but it may be a circle or other shape as shown in Fig. 5(b).Any other shape may be adopted without any particular limitation, such as a square, other polygons, or shapes with corner treatments.

[0058] FIG. 5(c) shows an embodiment in which the shape of the support row 3 is modified. In Figures 1 and 2, the support rows 3 (both the first support row 31 and the second support row 32) are depicted as being linear, but as shown in Figure 5(c), they may be curved. Concrete floors can be constructed in a variety of designs by devising the layout and shape of the joints, and the joints can also be constructed in a curved shape. Even in such construction examples, the shape of the support rows 3 can be changed depending on the design. [Explanation of symbols]

[0059] 1 Joint support 2 base 21 Split base 3 support rows 31 First Support Row 32 Second Support Row 33 Supporting wall 33a upper part 33b bottom 34 Notch 35 Curved section 4 Fixing hole 5 Fixed stake 51 Rod-shaped part 52 Head E Joint sealant G ground S: Hard objects such as stones

Claims

1. A support for temporarily fixing a joint material to the ground when pouring concrete on the ground, a plate-shaped base portion placed on the ground; A support row is provided on the base to support the joint material in an upright state, The base is provided with fixing holes for driving fixing stakes into the ground. The support column is provided perpendicular to the base, The support row is configured such that a first support row and a second support row are formed in different directions, and the first support row and the second support row intersect with each other; With these configurations, the joint support is characterized by being able to temporarily fix joint materials that intersect in two directions.

2. 2. The joint support device according to claim 1, wherein the support row is formed by two support walls, and the joint material is sandwiched and erected between the two support walls.

3. 3. The joint support device of claim 2, wherein the support walls of either the first support row or the second support row or both have an inwardly curved shape.

4. the support walls of either the first support row or the second support row or both are comprised of an upper portion having a notch and a lower portion not having a notch; 4. The joint support according to claim 2 or 3, wherein an upper portion of the support wall is curved inward.

5. The base is divided by the first support row and the second support row to form four divided bases; 3. The joint support according to claim 1, wherein a plurality of fixing holes are provided for each of the divided base portions.

6. 6. The joint support device according to claim 5, wherein the plurality of fixing holes provided in each divided base portion are configured such that two or more are provided in the vertical direction and two or more are provided in the horizontal direction.

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