jig

Abstract

This product provides a jig that can accommodate various types of mechanical joint sleeves and other structures. [Solution] A jig 900 for holding a structure 800 within a formwork X1, characterized by comprising: an enlarged diameter portion 500 configured to be insertable into a hole 810 of the structure 800; an insertion portion 600 inserted into the enlarged diameter portion 500 to enlarge the outer diameter of the enlarged diameter portion 500; and a connecting portion 700 for connecting the enlarged diameter portion 500 and the insertion portion 600 to the formwork X1.

Description

【Technical Field】 【0001】 The present invention relates to a jig used together with a mold for holding structures such as a mechanical joint sleeve of a reinforcing bar joint when manufacturing precast concrete products and the like. 【Background Art】 【0002】 Conventionally, concrete products such as precast concrete products have been manufactured by pouring concrete into a mold, solidifying it, and then removing it from the mold. In addition, structures such as mechanical joint sleeves of reinforcing bar joints may be incorporated in concrete products. When pouring and solidifying concrete, jigs have been used to fix the positions and orientations of structures such as mechanical joint sleeves of reinforcing bar joints so that they do not shift. This jig has fixed the position and orientation of the structure by inserting a part of the jig into the hole of the structure. However, there are cases where the sizes and types of the holes of the structure are different, or the holes are small, and the development of jigs that can handle holes of various sizes has been desired. 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0003】 Therefore, in view of the above problems, the present invention provides a jig that can handle structures such as mechanical joint sleeves of various types. 【Means for Solving the Problems】 【0004】 In order to solve the above problems, the jig of the present invention is a jig for holding a structure in a mold, and includes an expanded diameter portion configured to be inserted into a hole of the structure, an insertion portion inserted into the inside of the expanded diameter portion to expand the outer diameter of the expanded diameter portion, and a connecting portion connecting the expanded diameter portion and the insertion portion to the mold. 【0005】 Based on the above features, it is possible to accommodate various types of mechanical joint sleeves and other structures for rebar splices simply by changing the size of the insertion part, making it extremely convenient and versatile. 【0006】 Furthermore, in order to solve the above problems, the jig of the present invention is characterized in that the connecting portion comprises a bolt portion that is inserted through the enlarged diameter portion and the insertion portion, and a nut portion that is screwed onto the bolt portion, and the bolt portion is configured to be positioned on one side of the formwork and the nut portion on the other side of the formwork. 【0007】 Based on the above features, the structure can be easily connected to the formwork using the jig by simply tightening the nut, and the jig can be easily removed by simply loosening the nut. 【0008】 Furthermore, in order to solve the above problems, the jig of the present invention is characterized in that a spring member is arranged between the insertion portion and the diameter expansion portion. 【0009】 According to the above features, when removing the jig, the repulsive force of the compressed spring member pushes the insertion part away from the enlarged diameter part, making it easy for the enlarged diameter part to shrink back to its original shape. Therefore, the enlarged diameter part can be easily removed from the hole, and the jig can be easily removed from the structure. 【0010】 Furthermore, in order to solve the above problems, the jig of the present invention is characterized in that the diameter-expanding portion comprises a plurality of diameter-expanding members, and the diameter-expanding members are configured to be able to move closer to and further apart from each other. 【0011】 According to the above features, the outer diameter of the enlarged section can be easily changed by increasing or decreasing the number of enlarged members. Therefore, even if the size of the hole in the structure is changed, the outer diameter of the enlarged section can be appropriately changed so that it makes optimal contact with the inner surface of the hole. [Effects of the Invention] 【0012】 The jig of the present invention can accommodate various types of mechanical joint sleeves and other structures. [Brief explanation of the drawing] 【0013】 [Figure 1] Figure 1(a) is a perspective view of the diameter-expanding member 100, and Figure 1(b) is a plan view of the diameter-expanding member 100. [Figure 2] Figure 2(a) is a right side view of the diameter-expanding member 100, Figure 2(b) is a left side view of the diameter-expanding member 100, and Figure 2(c) is a front view of the diameter-expanding member 100. [Figure 3] Figure 3(a) is a perspective view of the enlarged diameter section 500, Figure 3(b) is a plan view of the enlarged diameter section 500, and Figure 3(c) is a front view of the enlarged diameter section 500. [Figure 4] Figure 4(a) is a perspective view of the enlarged diameter section 500, Figure 4(b) is a plan view of the enlarged diameter section 500, and Figure 4(c) is a front view of the enlarged diameter section 500. [Figure 5] Figure 5(a) is a perspective view of the insertion section 600, Figure 5(b) is a side view of the insertion section 600, and Figure 5(c) is a front view of the insertion section 600. [Figure 6] Figure 6(a) is a perspective view of the jig 900, and Figure 6(b) is a plan view of the jig 900. [Figure 7] This is a plan view of jig 900 in formwork X1. [Figure 8] This is a plan view of jig 900 in formwork X1. [Figure 9] This is a plan view of jig 900 in formwork X1. [Figure 10] This is a plan view of jig 900 in formwork X1. [Modes for carrying out the invention] 【0014】 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the shapes of the respective figures referred to are conceptual diagrams or schematic diagrams for explaining suitable shape dimensions, and the dimensional ratios and the like do not necessarily match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratios in the drawings. 【0015】 First, FIGS. 1 and 2 show the diameter-expanding member 100 of the diameter-expanding portion 500 of the jig 900 of the present invention. Note that FIG. 1(a) is a perspective view of the diameter-expanding member 100, FIG. 1(b) is a plan view of the diameter-expanding member 100, FIG. 2(a) is a right side view of the diameter-expanding member 100, FIG. 2(b) is a left side view of the diameter-expanding member 100, and FIG. 2(c) is a front view of the diameter-expanding member 100. 【0016】 The diameter-expanding member 100 has a substantially rectangular parallelepiped shape entirely made of synthetic resin or the like, and includes a main body portion 110, and at each of one end 111 and the other end 112 of the main body portion 110, a receiving portion 120 and an insertion portion 130 that project laterally from the side surface 113 of the main body portion 110. The inner surface 115 of the main body portion 110 is a flat surface that is recessed more than the one end 111 and the other end 112, and is a location for holding a spring member described later so as to be able to expand and contract. Further, grooves 117 are provided at each of the one end 111 and the other end 112 on the outer surface 116 of the main body portion 110, so that an expansion and contraction member described later can be locked. 【0017】 Also, the tip of the insertion portion 130 is curved inward (upper side in FIG. 2(c)). Similarly, the tip of the receiving portion 120 is curved inward (upper side in FIG. 2(c)), and the insertion portion 130 of another diameter-expanding member 100 is inserted into the inner hole portion 121, and the insertion portion 130 is configured to be slidable along the hole portion 121. 【0018】 Next, FIGS. 3 and 4 show the diameter-expanding portion 500 of the jig 900 of the present invention. Note that FIG. 3(a) is a perspective view of the diameter-expanding portion 500, FIG. 3(b) is a plan view of the diameter-expanding portion 500, FIG. 3(c) is a front view of the diameter-expanding portion 500, FIG. 4(a) is a perspective view of the expanded diameter-expanding portion 500, FIG. 4(b) is a plan view of the diameter-expanding portion 500, and FIG. 4(c) is a front view of the diameter-expanding portion 500. 【0019】 As shown in FIG. 3, the diameter-expanded portion 500 is formed by connecting a plurality of diameter-expanding members 100 in a ring shape. Specifically, with the inner surface 115 of the diameter-expanding member 100 facing the center side of the diameter-expanded portion 500, the insertion portion 130 of one adjacent diameter-expanding member 100 is inserted into the hole portion 121 of the receiving portion 120 of the other adjacent diameter-expanding member 100 to connect the adjacent diameter-expanding members 100 to each other. Since the receiving portion 120 and the insertion portion 130 are curved inward, when a plurality of diameter-expanding members 100 are continuously connected, the plurality of diameter-expanding members 100 are in a state of being connected in a ring shape. Although the diameter-expanded portion 500 is configured in a circular ring shape when viewed from the front, it is not limited thereto, and the diameter-expanded portion 500 can be configured in an elliptical shape when viewed from the front, etc., according to the shape of the hole portion of the structure, and can have any shape. Also, the outer shape of the insertion portion 600 described later can also have any shape according to the shapes of the diameter-expanded portion 500 and the hole portion of the structure. 【0020】 Also, an annular expansion member 150 is attached to the groove 117 on the one end 111 side and the groove 117 on the other end 112 side of each diameter-expanding member 100 so as to be locked. This expansion member 150 can be made of any material such as a spring or rubber as long as it can expand and contract. The inside of the diameter-expanded portion 500 is a cylindrical space 501 surrounded by the inner surface 115 of the diameter-expanding member 100, and a coiled spring member 200 is disposed therein. Also, openings 502 communicating with the internal space 501 are formed at both ends of the diameter-expanded portion 500. 【0021】 And, since the insertion portion 130 of the adjacent diameter-expanding member 100 is slidably inserted into the receiving portion 120 of each diameter-expanding member 100, the connected diameter-expanding members 100 can approach and separate from each other. Therefore, as shown in FIG. 4, the diameter-expanded portion 500 can expand such that the other end 112 of the diameter-expanding member 100 spreads outward. 【0022】 Furthermore, each expanding member 100 is connected by an expandable member 150, and when the expanding section 500 expands, a restoring force acts on the expandable member 150, stretching it back to its original shape. Therefore, the restoring force of the expandable member 150 maintains the connected state, preventing the expanding members 100 from separating too much. Moreover, if the external force that expands the expanding section 500 is removed, the restoring force of the expandable member 150 causes the expanding section 500 to automatically contract, returning to the state shown in Figure 3. Note that the expanding section 500 is not limited to being composed of multiple expanding members 100 connected in a ring shape; any configuration that can expand the diameter is acceptable. 【0023】 Next, Figure 5 shows the insertion portion 600 of the jig 900 of the present invention. Figure 5(a) is a perspective view of the insertion portion 600, Figure 5(b) is a side view of the insertion portion 600, and Figure 5(c) is a front view of the insertion portion 600. 【0024】 The insertion portion 600 is a roughly conical shape, entirely made of synthetic resin or the like. Its side surface 630 slopes from the tip 610 to the end 620, and it has a shape that widens in diameter from the tip 610 to the end 620. The surface 611 of the tip 610 is annular and is inserted into the internal space 501 through the opening 502 of the widened diameter portion 500 so that it can contact the spring member 200. The surface 621 of the end 620 is a flat surface and is configured to contact the inner surface of the mold described later. The insertion portion 600 also has a through hole 640 that penetrates from the tip 610 to the end 620, and is configured so that the connecting portion described later can be inserted through it. 【0025】 Next, Figure 6 shows the jig 900 of the present invention. Figure 6(a) is a perspective view of the jig 900, and Figure 6(b) is a plan view of the jig 900. 【0026】 The jig 900 comprises an enlarged diameter section 500, an insertion section 600, and a connecting section 700. The connecting section 700 comprises a bolt section 710, a nut section 720, and optionally a washer 730. The tip 610 of the insertion section 600 is inserted into one opening 502 of the enlarged diameter section 500, and the through hole 640 of the insertion section 600 is in communication with the opening 502. Next, the tip 711 of the bolt section 710 is inserted through the washer 730. Then, the tip 711 of the bolt section 710 is inserted through the other opening 502 of the enlarged diameter section 500, through the spring member 200 inside the enlarged diameter section 500, and through the through hole 640 of the insertion section 600 from the one opening 502. Furthermore, the tip 711 of the bolt portion 710, which protrudes to the outside through the through hole 640 of the insertion portion 600, can be fastened with a nut portion 720 screwed onto it. In this way, the components of the jig 900 are assembled to the state shown in Figure 7. Although the connecting portion 700 is equipped with a bolt portion 710 and a nut portion 720, it is not limited to this, and any configuration is acceptable as long as the enlarged diameter portion 500 and the insertion portion 600 can be connected to the formwork. 【0027】 Next, Figures 7 to 9 illustrate how the jig 900 of the present invention is used to hold the structure 800 within the formwork X1. Figures 7 to 9 are plan views of the jig 900 within the formwork X1. 【0028】 First, the structure 800 is a structure such as a sleeve for a mechanical joint and is equipped with a hole 810. The hole 810 extends in a straight line, and a window 820 communicating with the inside and outside of the hole 810 is optionally provided on a part of the outer surface of the structure 800. The opening 811 of the hole 810 faces to the side. A protrusion 812 projecting inward is provided on the inner surface of the opening 811. Although the structure 800 is a structure such as a sleeve for a mechanical joint, it is not limited to this, and any structure equipped with a hole 810 may be a structure of any shape, such as a box-shaped housing. 【0029】 The formwork X1 has any structure suitable for concrete products such as precast concrete products, and includes a wall section X2 on the inside X4 for pouring concrete. Furthermore, the wall section X2 is provided with a through hole X3 for inserting the tip 711 side of the bolt section 710 of the jig 900. 【0030】 Then, as shown in Figure 7, the assembled jig 900 is placed inside X4 of the formwork X1. Furthermore, the tip 711 of the bolt portion 710 of the connecting portion 700 is inserted through the through hole X3 of the wall portion X2, so that the tip 711 of the bolt portion 710 protrudes to the outside X5 of the wall portion X2. Also, the insertion portion 600 of the jig 900 is in contact with the inner surface of the wall portion X2. 【0031】 In this state, the structure 800, positioned inside X4 of the formwork X1, is brought closer to the jig 900, and as shown in Figure 8, the enlarged diameter portion 500 of the jig 900 is inserted into the hole 810 of the structure 800 through the opening 811. Then, the nut portion 720 is screwed onto the tip 711 of the bolt portion 710 protruding from the outside X5 of the wall portion X2. As shown in Figure 9, the screwing continues until the nut portion 720 contacts the wall portion X2, and then, by applying force to tighten the nut portion 720 further, as shown in Figure 9, the bolt portion 710 screwed onto the nut portion 720 moves forward toward the wall portion X2 (see arrow in Figure 9). In other words, when the nut portion 720 is tightened, the nut portion 720 and the bolt portion 710 move closer to each other, but the nut portion 720 does not move because it is in contact with the wall portion X2, so the bolt portion 710 moves forward toward the wall portion X2. The degree of forward movement of the bolt portion 710 can be observed from the window 820 of the structure 800. 【0032】 As a result, a part of the bolt portion 710 (for example, the head 713 or the washer 730) is in contact with one end of the enlarged diameter portion 500 (the side away from the wall portion X2). Therefore, as the bolt portion 710 moves forward, the enlarged diameter portion 500 is pressed down by the bolt portion 710 as it moves toward the insertion portion 600 and the wall portion X2. Since the insertion portion 600 is in contact with the wall portion X2 and does not move, as the enlarged diameter portion 500 is pushed into the insertion portion 600, the tip 610 of the insertion portion 600 is inserted deeply into the internal space 501 through the opening 502 of the enlarged diameter portion 500. As the insertion portion 600 expands in diameter from the tip 610 to the end 620, the expansion portion 500 expands outward due to the inner insertion portion 600 as it is inserted deeper into the expansion portion 500, causing the expansion portion 500 to expand in diameter. 【0033】 As a result, the outer surface of the enlarged diameter portion 500 comes into strong contact with the inner surface of the hole portion 810 of the structure 800, and is firmly connected to the structure 800. Furthermore, since the jig 900 is fixed to the wall portion X2 by tightening the nut portion 720, the structure 800 is held in place by the jig 900 so that its position and orientation do not shift within the formwork X1. In this state, after pouring concrete into the formwork X1 and allowing it to harden, the connection between the jig 900 and the wall portion X2 can be released by loosening the nut portion 720, and the concrete product containing the structure 800 can be removed from the formwork X1. In addition, the end of the enlarged diameter portion 500 (the end facing the formwork X1) can come into contact with the protrusion 812 of the structure 800, so the structure 800 is firmly fixed so that it does not come out of the jig 900. 【0034】 Furthermore, Figure 10 shows the case where the inner diameter of the hole 810A in structure 800A is larger than the hole 810 in structure 800 in Figure 9. Figure 10 is a plan view of the jig 900 in formwork X1, shown in the same manner as in Figure 9. 【0035】 As shown in Figure 10, if the inner diameter of the hole 810A of the structure 800A is large, an insertion part 600A with a larger outer diameter than the insertion part 600 shown in Figure 7 is prepared accordingly. As shown in Figure 10, because the outer diameter of the insertion part 600A is large, the enlarged diameter part 500 is expanded outward by the inner insertion part 600A. As a result, the outer surface of the enlarged diameter part 500 firmly and securely contacts the inner surface of the hole 810A of the structure 800A, even if the inner diameter of the hole 810A of the structure 800A is large, and is strongly connected to the structure 800A. Furthermore, since the jig 900 is firmly fixed to the wall part X2 by tightening the nut part 720, the structure 800A is held in place by the jig 900 so that its position and orientation do not shift within the formwork X1. 【0036】 Thus, according to the jig 900 of the present invention, even if the size of the hole portion 810A of the structure 800A is different, it is possible to accommodate various types of mechanical joint sleeves and other structures simply by changing the size (outer diameter) of the insertion portion 600A, making it extremely convenient and versatile. 【0037】 Furthermore, since the connecting portion 700 is equipped with a bolt portion 710 and a nut portion 720, the structure 800 can be easily connected to the formwork X1 by the jig 900 with a simple operation of tightening the nut portion 720. In addition, the jig 900 can be easily removed with a simple operation of loosening the nut portion 720. 【0038】 Furthermore, a spring member 200 is positioned between the enlarged diameter portion 500 and the insertion portion 600. When the nut portion 720 is tightened and the structure 800 is fixed by the jig 900, the insertion portion 600 is inserted deeply into the enlarged diameter portion 500, so the spring member 200 is compressed. Due to the repulsive force of the compressed spring member 200, the insertion portion 600 is pressed towards the wall portion X2, so that the jig 900 can be firmly fixed to the formwork X1 by sandwiching the wall portion X2 from both sides between the insertion portion 600 and the nut portion 720. Also, when the nut portion 720 is loosened and the jig 900 is removed, the repulsive force of the compressed spring member 200 pushes the insertion portion 600 away from the enlarged diameter portion 500, so that the enlarged diameter portion 500 can easily shrink back to its original shape. Therefore, the enlarged diameter portion 500 can be easily removed from the hole portion 810, and the jig 900 can be easily removed from the structure 800. 【0039】 Furthermore, since the enlarged diameter section 500 is equipped with multiple enlarged diameter members 100, the outer diameter of the enlarged diameter section 500 can be easily changed by increasing or decreasing the number of connected enlarged diameter members 100. Therefore, even if the size of the hole 810A of the structure 800A is changed, the outer diameter of the enlarged diameter section 500 can be appropriately changed so that the enlarged diameter section 500 can optimally contact the inner surface of the hole 810A. 【0040】 Furthermore, the jig of the present invention is not limited to the above-described embodiments, and various modifications and combinations are possible within the scope of the claims and embodiments, and these modifications and combinations are also included within the scope of the patent rights. [Explanation of Symbols] 【0041】 500 Expanded section 600 Insertion section 700 Connection part 800 Structures 900 jigs X1 formwork

Claims

[Claim 1] A jig for holding a structure within a formwork, The enlarged diameter portion is configured to be insertable into the hole in the aforementioned structure, An insertion part is inserted into the enlarged diameter portion to enlarge the outer diameter of the enlarged diameter portion, A jig characterized by comprising a connecting portion for connecting the enlarged diameter portion and the insertion portion to the formwork. [Claim 2] The connecting portion comprises a bolt portion that is inserted through the enlarged diameter portion and the insertion portion, and a nut portion that is screwed onto the bolt portion. The jig according to claim 1, characterized in that the bolt portion is configured to be positioned on one side of the formwork and the nut portion is positioned on the other side of the formwork. [Claim 3] The jig according to claim 1 or 2, characterized in that a spring member is arranged between the insertion portion and the diameter-expanding portion. [Claim 4] The aforementioned enlarged diameter portion comprises a plurality of enlarged diameter members, The jig according to claim 1 or 2, characterized in that the diameter-expanding members are configured to be able to move closer to and further apart from each other.

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