Turnbuckle with manual and electric drill drive functions

Abstract

We provide a slide buckle that adds an electric drill drive function to a turnbuckle. [Solution] A hand-operated turnbuckle having a pair of first and second hook members, wherein one of the pair of first and second hook members consists of a hook portion and a helical shaft portion separated from the hook portion, the helical shaft portion having a bolt head fixed to its outer end and forming a screw shaft body that can be rotated by an electric drill having a long bolt structure, while the hook portion is fitted onto the helical shaft portion of the screw shaft body and fixed to a second cylindrical body (guide cylinder) that is slideable when pressed by the bolt head of the screw shaft body, and the exposed bolt head of the screw shaft body is rotated by an electric drill, and the helical shaft of the screw shaft body is screwed into the storage cylinder which is the first cylindrical body, thereby sliding the guide cylinder which is the second cylindrical body with the bolt head, and the towed member that is separated by the second hook of the guide cylinder and the remaining first hook has an electric drill drive function.

Description

Technical Field

[0001] This invention relates to a turnbuckle equipped with both a manual turning function and an electric drill drive function.

Background Art

[0002] The formwork for placing concrete in a reinforced concrete structure is held in position by side frames in the horizontal and vertical directions so that its position is not rubbed and its shape is not deformed by the pressure of the fluidized concrete during concrete placement. Further, the formwork is restrained by a tension member such as a formwork of a strut member and a reinforcing member such as a chain of a tension member so that its position does not shift even when receiving vibration and pressure during concrete placement. Also, in ship transportation, a container to be transported is tied up by a wire rope or the like so that it is in a state without play and does not shift in position. The tension of these reinforcing members such as chains and wire ropes is adjusted by a tensioning device such as a turnbuckle so that slack does not occur.

[0003] This type of turnbuckle has a pair of screw shafts (hereinafter referred to as hooks or hook members) having locking portions such as hooks at their tips, one with a right-hand thread and the other with a left-hand thread, at both ends of a rotary turnbuckle constituting the body portion. These are screwed into the central rotary turnbuckle, and the turnbuckle is rotated about its axis with a manual wrench so that the traction hook positions of the screw shafts at both ends are brought closer in the tightening direction. However, this turnbuckle has a problem that when the length to be pulled is long, the number of rotations for turning around the axis of the central turnbuckle increases, and it takes time and effort to adjust the tension. Also, when the slack of the reinforcing member decreases, the body portion of the turnbuckle and the reinforcing member such as a chain are parallel and close to each other, so there is a structural problem that it is difficult to turn this with a wrench.

[0004] Therefore, an electric turnbuckle that uses an electric drill to shorten the tightening work time has been proposed as a turnbuckle with excellent workability without using a wrench. Patent Document 1 proposes a fastening device that uses a cylindrical body with a locking device such as a hook attached, with a screw shaft protruding from the opposite side of the cylindrical body and a nut screwed onto it, and the first locking part of the shaft and the second locking part near the hook part are pulled closer by tightening the nut with an electric drill. Patent Documents 2 and 3 also propose a fastening device that uses a double-cylinder structure in which one cylindrical body and the other cylindrical body are slidably fitted together, with a bolt shaft inserted from the first cylindrical body to the second cylindrical body, the tip of the bolt shaft screwed into a screw hole provided in the second cylindrical body, and the first cylindrical body is fed into the second cylindrical body by driving the bolt head with an electric drill, thereby bringing the locking parts provided on the first and second cylindrical bodies closer together. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent No. 5004144 [Patent Document 2] Japanese Patent Publication No. 54-27657 [Patent Document 3] USP No. 4131264 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, in Patent Document 1, the nut-tightening type requires a special tool with a long auxiliary cylinder attached to the tip of the electric drill because the tip of the threaded rod passes through the nut and protrudes to the outside of the nut. On the other hand, Patent Documents 2 and 3 have a double-cylinder structure consisting of an inner cylinder and an outer cylinder, which requires a cylinder length necessary for the tightening length, making the structure complex and requiring separate new manufacturing equipment. Furthermore, the biggest difficulty when using this type of electric drill is the difficulty in confirming and ensuring the strength required for the final tightening. This is because the electric drill does not have a function to increase the tightening strength only at the final stage of tightening. [Means for solving the problem]

[0007] This invention was developed with the following points in mind. Specifically, when using an electric drill, it is difficult to confirm and ensure sufficient tightening strength in the last quarter or half rotation, unlike during the tightening process. We found that in order to achieve sufficient final tightening strength that is double that of a normal rotation with an electric drill, it is desirable to use both the rotation of the electric drill and the rotation of a wrench for tightening. Based on this finding, we continued to refine our design and found that it is necessary to give a conventional turnbuckle that uses a wrench a rotation function that can be driven by an electric drill.

[0008] This invention is based on the above findings and provides a turnbuckle that has the structure of a conventional turnbuckle, that is, a manual turning function, while also having an electric drill driving function. These two different functions are achieved by having a normal turnbuckle structure in which a pair of hook members expand and contract by rotating around the axis of the central body buckle, while dividing one of the pair of hook members into a hook part and a helical shaft part, fixing a bolt head to the outer end of the helical shaft part to provide an electric drill driving function, and providing a cylindrical body that slides into the helical shaft part, fixing the hook part to the cylindrical body to realize the electric drill driving function. In other words, the present invention is a hand-operated turnbuckle comprising a pair of first and second hook members that engage with separated towed members, and a first cylindrical storage cylinder (turnbuckle) into which the pair of first and second hook members are screwed at both ends, wherein the first cylindrical storage cylinder is rotated by hand around its axis to screw the pair of first and second hook members into both ends of the first cylindrical storage cylinder, thereby tightening the separated towed members with the pair of first and second hook members. One of the pair of first and second hook members consists of a hook portion and a helical shaft portion separated from the hook portion, the helical shaft portion having a bolt head fixed to its outer end and forming a screw shaft body that can be rotated by an electric drill forming a long bolt structure, while the hook portion is fitted onto the helical shaft portion of the screw shaft body and fixed to a second cylindrical body (guide cylinder) that is slidable when pressed by the bolt head of the screw shaft body. The device is characterized by the ability to rotate the exposed bolt head of the threaded shaft with an electric drill, screw the helical shaft of the threaded shaft into the storage cylinder which is the first cylindrical body, thereby sliding the guide cylinder which is the second cylindrical body with the bolt head, and tightening the separated towed member between the second hook of the guide cylinder and the remaining first hook, and by having both a manual turning function and an electric drill driving function. turnbuckle That is . [Effects of the Invention]

[0009] According to this invention, a turnbuckle with a manual turning function is equipped with an electric drill drive function, allowing users to switch between the two functions as needed. One such function is to quickly perform the initial tightening work with the electric drill, and then use a little manual turning at the end to confirm and achieve sufficient tightening strength. Furthermore, it is possible to perform the work even if the electric drill is malfunctioning or has insufficient power, so having both functions makes it user-friendly and convenient.

[0010] Furthermore, this invention offers cost-effectiveness because it can be manufactured using conventional turnbuckle components such as hook members and storage cylinders. Specifically, one of the pair of hook members of a turnbuckle is separated into a hook portion and a helical shaft portion. A bolt head is fixed to the outer end of the helical shaft portion, while a second cylindrical body (guide cylinder) is fitted onto the helical shaft portion of the threaded shaft and slides when pushed by the bolt head of the threaded shaft. The remaining hook portion is then fixed in place, allowing the use of conventional turnbuckle manufacturing equipment. [Brief explanation of the drawing]

[0011] [Figure 1] This is a cross-sectional diagram illustrating the principle of the first embodiment, which is manufactured using a conventional turnbuckle. In this embodiment, a conventional turnbuckle (storage cylinder) is used as the first cylindrical body, and a second hook is provided on the second cylindrical body, with a pair of hooks being pulled together. [Figure 2] This is a cross-sectional diagram illustrating a modified version of Figure 1, where the first hook is fixed to the turnbuckle, which is a storage cylinder. [Modes for carrying out the invention]

[0012] Figure 1 shows a conventional turnbuckle. of This cross-sectional view illustrates the principle of an embodiment utilizing the structure, using a conventional turnbuckle (storage cylinder) as the first cylindrical body. In such a turnbuckle, when the central buckle is rotated around its axis, a pair of first and second hooks at both ends of the storage cylinder expand and contract from a separated position to a tightened position, and vice versa. It consists of a pair of first and second hook members that engage with the separated towed member, and a storage cylinder (turnbuckle) which is the first cylindrical body into which the pair of first and second hook members are screwed at both ends. The storage cylinder, which is the first cylindrical body, is rotated by hand around its axis to screw the pair of first and second hook members into both ends of the storage cylinder, which is the first cylindrical body, and has a hand-turning function that tightens the separated towed member with the pair of first and second hook members. Here, one side of the turnbuckle is used as the first hook (in this specification, this means a hook member consisting of a hook portion and a helical shaft portion). The other second hook is removed from the turnbuckle, and the female threaded body at the end of the remaining storage cylinder is used as the second nut. That is, the second hook is divided into a hook portion and a helical shaft portion. The hook portion is made up of a second cylinder (guide cylinder), and the hook portion is fixed to this second cylinder. On the other hand, the remaining helical shaft portion has a bolt head at one end to form a second long bolt (threaded shaft), and the second cylinder (guide cylinder) is inserted through the abutting end of the first cylinder (storage cylinder) from the opposite end in the abutting direction, and the tip of the second helical shaft thread of the second long bolt is screwed into the second nut of the storage cylinder, which is the first cylinder, to assemble it. Next, by rotating the exposed head of the second long bolt with an electric drill, the guide cylinder, which is the second cylinder, is moved to a position where it abuts against the storage cylinder, and the guide cylinder is placed over the storage cylinder, thus providing an electric drill drive function. In this embodiment, the length of the turnbuckle can be changed by rotating the first hook relative to the storage cylinder. Figure 2 is a modified version of Figure 1, a cross-sectional diagram showing the case where the first hook is fixed to the turnbuckle, which is the storage cylinder. The rest is the same as in Figure 1, so the explanation is omitted.

Claims

1. A hand-operated turnbuckle comprising a pair of first and second hook members that engage with separated towed members, and a first cylindrical storage cylinder (turnbuckle) into which each of the pair of first and second hook members is screwed at both ends, wherein the first cylindrical storage cylinder is rotated by hand around its axis to screw the pair of first and second hook members into both ends of the first cylindrical storage cylinder, thereby tightening the separated towed members with the pair of first and second hook members, One of the pair of first and second hook members consists of a hook portion and a helical shaft portion separated from the hook portion, the helical shaft portion having a bolt head fixed to its outer end and forming a screw shaft body that can be rotated by an electric drill forming a long bolt structure, while the hook portion is fitted onto the helical shaft portion of the screw shaft body and fixed to a second cylindrical body (guide cylinder) that is slidable when pressed by the bolt head of the screw shaft body. A slide buckle characterized by having both a manual turning function and an electric drill driving function, wherein the exposed bolt head of the threaded shaft body is rotated with an electric drill, and the helical shaft of the threaded shaft body is screwed into the storage cylinder which is the first cylindrical body, thereby sliding the guide cylinder which is the second cylindrical body with the bolt head, and tightening the pulled member which is separated by the second hook of the guide cylinder and the remaining first hook.

2. The slide buckle according to claim 1, wherein the other end of the first and second hook members is fixed to the opposite end of the first storage cylinder, with the end that screws into the screw shaft being fixed to the opposite end.

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