JP3925529B2 - Rope tensioning device - Google Patents

Description

  The present invention relates to a rope tensioning device technology, and more specifically, a master rope (also referred to as a parent rope) for preventing a fall in a high-altitude work or a rope that temporarily supports a member at a construction or dismantling construction site. This is a rope tensioning device used for installation, and the other end of the rope with one end fixed is inserted through the rope tensioning device and taken out to the outside. The present invention relates to a rope tensioning device for tensioning a rope by rotating a rotating member using a tool such as a wrench.

As a conventional technique related to a rope tensioning device for tensioning a parent rope for preventing a fall in high-altitude work, a pair of opposing left and right side plates, a connecting portion for connecting one end sides of the both side plates with a space therebetween, and the both side plates And a ratchet mechanism that is provided on one outer surface of the both side plates to prevent reverse rotation of the rotating member, and an insertion hole is formed in the rotating member. In addition, a rope tensioning device is known that forms a winding portion that can be wound by hooking the end of the rope into the insertion hole (see, for example, Patent Document 1). This conventional rope tensioning machine has a structure in which a wrench is attached to the shaft end of a rotating member and rotated, and the rope is wound around the rotating member by manual operation to be tensioned.
JP 2002-147540 A (pages 1 and 2, FIGS. 1 to 5)

In the conventional rope tensioning device, by rotating and winding the rotating member on which the end of the rope fixed at one end is wound, the rope in a relaxed state is stretched. Because the rope take-up part of the member has a rectangular shape with a corner, for the purpose of winding up a high-rigidity wire rope, such as a master rope made of a covered wire rope used to prevent falling at work in high places Is not the optimal shape. That is, in the conventional rope tensioning device, when the rope is wound around the winding portion that is angular, the sheath of the rope is damaged, the inner strand is broken, and the tip of the strand protrudes in a spine shape on the coating surface. This not only causes finger injury and work clothes being caught and damaged, but when the loose rope is wound up, the rope becomes turbulent and the upper rope is placed in the gap between the lower ropes. However, there is a problem that it becomes difficult to loosen the rope at the next tension of the rope, and the rope is greatly deteriorated and the durability is inferior.
In addition, since this device is a method of winding up sequentially from the end of the rope, if the slack rope (excess length) is long, it takes time to wind up and not only the workability is inferior, but also the rotating member as it gets thicker There is an inconvenience that the rotation operation becomes heavy. In order to wind the rope of the required amount around the winding part, it is necessary to increase the radial dimension and the lateral width dimension of the rotating member, which leads to an increase in the size and weight of the device, particularly at a high place. There were also problems such as difficulties in handling.
In addition, if the rope becomes loosely wound, it is difficult to loosen the rope simply by removing the ratchet to loosen the rope during the next tension of the rope, the person who supports the device, the person who reverses the handle and the person who pulls the rope, etc. In some cases, it is necessary to pull out the rope with a couple of people.

  In view of the above-mentioned situation, the present invention intends to solve the problem that the rope can be easily and quickly stretched with a little damage to the rope while being able to reduce the size and weight. When a rotating member is rotated by operating a tool such as a rope tensioning device, which can be operated without bringing the tool into contact with a fixing member such as a pipe or a column that holds a hook. is there.

In order to solve the above-mentioned problems, the present invention provides a main body provided with a rotating member for winding a rope, and a reversible preventing means capable of reversing the rotating member, and a state protruding from the main body to the outside. In the rope tensioning device comprising a hook with a base end attached to the rotary member, the rotary member is positioned on both sides in the left-right width direction of the rotary member through an introduction hole formed at a specific location on the outer peripheral portion thereof. A rope insertion passage for taking out the rope from the lead-out hole formed in at least one of the lateral side portions is provided, and the rotation member is rotated by meshing with a tooth portion provided in the rotation member. A rotating member for operation having a tooth portion is provided at a position on the opposite side of the hook with the rotating member sandwiched between the main body, and the rotating member for operation can be manually rotated from outside with a tool. Become Let me provided with a tool attachment portion on the end of the rotating shaft of the sea urchin 該操 action rotating member, to constitute a rope tensioning device.
Therefore, the other end of the rope with one end fixed is taken out through the rope insertion passage formed in the rotating member, and the other end is pulled by hand, so that the loose rope is quickly tensioned (tensioned state) Can be. From this state, the operating rotary member is rotated using a tool such as a wrench, and the rope can be strongly tensioned only by winding the rope around the rotary member several times (for example, about 1 to 3 rotations). In addition, the other end of the rope can be wound around the rotating member while being tensioned to some extent, and at the same time, it can only be wound several times. Even when releasing, the rope wound around the rotating member can be immediately unwound and sent out simply by releasing the reverse rotation preventing means. In addition, by providing a tool mounting portion of the operating rotary member at a position on the opposite side of the hook with the rotary member sandwiched between the main body, a tool having a large rotational swing range such as a wrench can be provided. When the tool is mounted and operated, not only does the tool not contact the fixing member that holds the hook, but the tool can be operated as far as possible from the fixing member. If the rotating member for operation is configured to have a smaller diameter than the rotating member, the rotating member can be rotated with a small operating force.

  The main body may include a pair of left and right divided cases, and the rotating member, the reverse rotation preventing means, and the operating rotating member may be provided in the divided case.

  The tool may be a wrench, and the mounting portion may be a wrench mounting portion.

  The rotating member has a drum having a substantially cylindrical body portion in which a recess having an opening at one lateral side is formed at the center of rotation, and the drum is wound around the outer peripheral portion of the drum on each of the lateral side portions of the drum. A flange portion for receiving the rope to be formed, and a tooth portion formed on the outer peripheral surface of the flange portion so as to mesh with the tooth portion of the operation rotating member, and the trunk portion is an inner side forming the concave portion An annular portion, an outer peripheral surface around which a rope is wound, an outer annular portion having the flange portion, and a plurality of ribs that connect the inner annular portion and the outer annular portion in a radial direction. May be.

Just by forming a rope insertion path in the rotating member, pull the slack rope to the outside and stretch it to some extent, and then wrap the rope around the rotating member several times (for example, about 1 to 3 turns) to put the rope in tension Compared to the case where the rope is stretched gradually while winding the slack rope, not only can the rope tension work time be shortened, but also the rope will not be spirally wound. . In addition, since the apparatus can be constructed from a capacity capable of winding the rope around the rotating member several times (for example, about 1 to 3 rotations), the size and weight can be reduced accordingly.
In addition, the tool mounting part of the rotating member for operation is provided at a position on the opposite side of the hook with the rotating member sandwiched between the main body, so that the tool mounting part can be operated when the tool is mounted on the tool mounting part. Not only does the tool come into contact with the fixed member that is locked, but the tool can be easily operated with the tool as far away from the fixed member as possible, and the rope can be tensioned more quickly. Can do. In addition, if the rotating member for operation is configured to have a smaller diameter than the rotating member, the rotating member can be rotated with a small operating force, and the rope tensioning work can be performed quickly and easily with a light operating force. .

  The main body is composed of a pair of left and right divided cases, and a rotating member, a reverse rotation preventing means, and a rotating member for operation are provided in the divided case, so that these many members are exposed to the outside when provided between the left and right side plates. Not only can this be done, but the impact strength of the device can be improved. In addition, in the case of the configuration provided between the left and right side plates, a plurality of connecting metal fittings for connecting the both side plates are required, resulting in an increase in the number of parts. In addition, the attachment position of the member is not restricted depending on the shape of the case, and the degree of design freedom can be increased. Further, if the left and right divided cases are made of the same one, the case can be manufactured with one mold, which is advantageous in terms of cost.

  A rotating member is wound around an outer peripheral portion of the drum on each of the lateral side portions of the drum and a drum having a substantially cylindrical body portion in which a concave portion opened on one lateral side is formed at the center of rotation. A flange portion for receiving the rope, and a tooth portion formed on the outer peripheral surface of the flange portion so as to mesh with the tooth portion of the rotating member for operation. An outer annular surface around which a rope is wound and an outer annular portion having a flange portion, and a large number of ribs that connect the inner annular portion and the outer annular portion in the radial direction, While the required strength can be ensured, the rotating member can be reduced in weight.

  FIG. 1 to FIG. 4 show a rope tensioning device used for, for example, tensioning a parent rope for preventing falling during work at a high place. The rope tensioning device includes a main body 4 provided with a rotating member 2 for winding the rope 1 and a reversible prevention means 3 that can be released to prevent the rotating member 2 from reversing, and a state in which the main body 4 projects outward from the main body 4 However, the present invention is not limited to the configuration shown in the figure.

  As shown in FIGS. 2, 3 and 5, the main body 4 is composed of a pair of left and right divided cases 4A and 4A. In the divided cases 4A and 4A, the rotating member 2 and the reverse rotation preventing means 3 are described later. An operation rotating member 6 is provided. The split cases 4A and 4A are composed of symmetrical left and right types, but can also be composed of left and right asymmetric divided cases. Further, by constructing the main body 4 from the divided cases 4A and 4A, the number of parts is reduced and the strength is increased compared to a case where the main body 4 is composed of a pair of left and right side plates and a plurality of connecting metal fittings for connecting the side plates. In addition to the above, there is an advantage that it is possible to avoid contact of other objects with internal components, but it may be configured by a pair of left and right side plates and a plurality of connecting metal fittings for connecting these side plates. R and R shown in FIGS. 3 and 5 guide the rope 1 inserted into the case through the rope insertion port 4D formed in the divided cases 4A and 4A from above and below to insert the rope 1. This is a guide roller for regulating the posture, and may be omitted in some cases. 4E in the figure is an opening for checking the state in the divided cases 4A and 4A, or for visually observing when inserting the end of the rope 1 into the introduction hole 2H of the rotating member 2 described later. is not.

  As shown in FIGS. 5 and 6, the rotating member 2 includes a drum 2 </ b> A having a substantially cylindrical body 2 b in which a recess 2 a having an opening 2 </ b> K that is open only at one lateral side is formed at the center of rotation. A flange portion 2F for receiving the rope 1 wound around the outer peripheral portion 2B of the drum 2A on each of both lateral sides of 2A, and an operation rotating member 6 described later on the outer peripheral surfaces of these flange portions 2F, 2F It consists of a large number of tooth portions 2G formed so as to mesh with the tooth portions 6G. The material of the rotating member 2 is preferably a metal, but may be made of a synthetic resin or the like as long as it has the same strength as the metal.

  The trunk portion 2b includes an inner annular portion 2C that forms the recess 2a, an outer peripheral surface around which the rope 1 is wound, an outer annular portion 2D that includes the flange portions 2F and 2F, and the inner annular portion. It is composed of a large number of ribs 2E that connect the portion 2C and the outer annular portion 2D in the radial direction (radially), and the strength can be increased by providing the ribs 2E while reducing the weight. However, other shapes are possible. The inner annular portion 2C protrudes outward in the left-right width direction from the other portions to form boss portions at both left and right ends, and these boss portions are formed at substantially the center of each of the divided cases 4A and 4A. By fitting in the through holes 4B and 4B, the rotating member 2 can be rotatably supported with respect to the divided cases 4A and 4A.

  The rotating member 2 passes through an introduction hole 2H formed at a specific location on the outer peripheral portion 2B of the rotating member 2 and is substantially at the center of rotation of one of the lateral sides located on both sides in the left-right width direction of the rotating member 2. An insertion path 2L for the rope 1 is provided for taking out the rope 1 from the lead-out hole 2J formed in the outside. In the figure, the lead-out hole 2J is formed only on one lateral side, but it may be formed on both lateral sides so that the end of the rope 1 can be led out from either side. In this case, the strength of the rotating member 2 is reduced. As shown in FIG. 6, the insertion path 2L is a straight path connecting the introduction hole 2H and the lead-out hole 2J at an angle of approximately 45 degrees, but may be a curved path or having a cross-sectional shape. An L-shaped path may be used, and the shape as the path can be freely changed.

  The main body 4 has a pair of left and right gears as a rotating member for operation provided with a large number of tooth portions 6G for meshing with the tooth portions 2G and 2G provided on the rotating member 2 to rotate the rotating member 2. 6 and 6 are provided. Specifically, the gears 6 and 6 are externally fitted to the rotary support shaft 7 having a hexagonal cross-sectional shape in an integrally rotated state, and both ends of the rotary support shaft 7 are passed through the split cases 4A and 4A via the ring member 8. Each of the holes 4F and 4F is rotatably supported. Further, the gear 6 is provided at a position on the opposite side of the hook 5 with the rotating member 2 sandwiched between the main body 4, that is, on the side away from the hook 5, and one end of the rotating support shaft 7 is divided into a split case. The tool mounting portion 7S is configured so that the gears 6 and 6 can be manually rotated from outside by using a tool by projecting from 4A to the set length to the outside. Accordingly, the tip of a hexagon wrench as a tool is fitted to the tool mounting portion 7S, and then the gears 6 and 6 are rotated by rotating the hexagon wrench and simultaneously the rotating member 2 is rotated. The tensioning operation can be performed so that the hex wrench that is swinging does not come into contact with the fixing member (pipe P in the figure) that holds and fixes the hook 5 during the tensioning operation. Yes.

  The hook 5 is swingably fitted to a collar 19 fitted and fixed to one end in the longitudinal direction of the split cases 4A and 4A, and one end of the hook 5A is longer than the other end. The side is pivotally connected to and supported by the base end portion of the flange member 5A via a pin 9, and the tip is rocked by a spring (not shown) so as to contact the inner surface of the other end, which is the short side of the flange member 5A. One end of the locking member 5B, which is urged by movement, is supported on the outer side of the base end portion of the flange member 5A through a pin 10 so as to be swingable, and the locking member 5B is formed in a long hole 12A formed at the other end. The locking lever 12 is configured to pass through a shaft 11 provided in an extending portion that extends from the base end portion of the member, and to regulate the swing of the locking member 5B. Therefore, by swinging the lock lever 12 around the axis of the pin 10 in the direction of the arrow shown in FIG. 1, the shaft 11 positioned at one end of the long hole 12A can move to the other end side. Then, the locking member 5B is swung around the axis of the pin 9 in the direction of the arrow shown in FIG. 1 to open and lock the hook 5 locked to the pipe P shown in FIGS. Although it can be canceled, other configurations may be used.

  As shown in FIGS. 3 and 5, the reverse rotation prevention means 3 is positioned between the left and right gears 6 and 6 and is externally fitted to the rotary support shaft 7 in an integrally rotated state. The claw wheel 12 formed with the claw 12A and the claw wheel 12A of the claw wheel 12 are engaged with the claw 12A only when rotating on one side and are fitted and fixed to the divided cases 4A and 4A in order to prevent the claw wheel 12 from rotating backward. And a spring 15 for swinging and biasing the claw member 13 so that the claw portion 13A of the claw member 13 is engaged with the claw 12A of the claw wheel 12. Although it is comprised from the ratchet mechanism which becomes, another structure may be sufficient. The split cases 4A and 4A are formed with openings 4C through which fingers can be inserted from the outside so that the claw member 13 engaged with the claw wheel 12 can be released.

A method of using the rope tensioning device will be described. For example, the rope tensioning device is used for the work of tensioning the parent rope of the safety rope for preventing the fall of the worker on the scaffolding of the construction site, as well as the construction of the safety rope for securing the passage at the construction site. It is used for various purposes as a tool for tensioning ropes in various operations such as temporary support for work, assembling pillar members and the like during assembly of structures.
Specifically, a wire-covered wire rope with an outer diameter of 11 mm (wire rope outer diameter of 10 mm, covering material thickness of about 0.5 mm) is used as the parent rope 1, and a hook attached to one end of the parent rope 1 As shown in FIG. 7, 16 is locked to one of a pair of pipes (posts) P, P arranged at an interval of about 10 m, and the other end is hooked to the other pipe P by the hook portion 5. Pass the rope tensioning device 2 through the rotating member 2 as described above, pull out the end of the rope 1 to the outside and pull it by hand to some extent, and then operate the rope tensioning device using a hex wrench (the parent rope to the rotating member 2). 1 is wound 1-3 times), and the span 1 of the parent rope 1 is stretched horizontally so that the span L is about 10 m and the height H is about 3 m. A hook 18 of a rope 17 with a hook, one end of which is connected to an operator, is locked to the parent rope 1 at an intermediate portion of the parent rope 1 stretched in this way so that the work can be performed safely.
The rope called the parent rope is generally a fiber rope made of a synthetic fiber material having an outer diameter of about 16 mm, or an outer diameter of about 10 mm to a wire rope coated with a vinyl coating having a thickness of about 0.5 to 1 mm. Although a wire rope with a vinyl coating of 11 to about 12 mm is used, a rope having another configuration may be used.
The rope is not locked only by passing through the rope insertion passage 2L of the rotating member 2, but the rope 1 has an appropriate rigidity and the rope 1 is rotated several times (usually about 1 to 3 rotations). When the rope 1 is wound, not only does the rope 1 increase in tension and a frictional force with the outer peripheral surface of the rotating member 2 is generated, but the rope 1 is bent by the introduction hole 2H of the rope insertion path 2L, and the rope insertion path 2L Accordingly, an appropriate movement resistance force is generated, and the escape of the rope 1 is restricted.

It is a top view of a rope tensioning device. It is a side view of a rope tensioning device. It is a vertical section top view of a rope tensioning device. It is a cross-sectional side view of a rope tensioning device. It is a disassembled perspective view of the rope tension apparatus which abbreviate | omitted the hook. It is sectional drawing of a rotation member. It is explanatory drawing which shows the state which tensioned the rope with the rope tensioning apparatus between a pair of pipes standing at a predetermined interval.

Explanation of symbols

1 Rope (parent rope)
2A Drum 2E Rib 2F Flange part 2L Rope insertion path 2a Recess 2 Rotating member 2K Opening 2B Outer peripheral part 2D Outer annular part 2G Tooth part 2J Lead-out hole 2H Introduction hole 2b Inner annular part 3 Reverse rotation prevention means 4D Rope insertion port 4C Opening 4A Division case 4B Through-hole 4F Through-hole 4 Main body 5 Hook 5B Member 5A Gutter member 6 Gear (Rotating member for operation)
6G tooth portion 7 rotating support shaft 7S tool mounting portion 8 ring member 9 pin 10 pin 11 shaft 12 lock lever 12A long hole 12A claw 12 claw wheel 13A claw portion 13 claw member 14 pin 15 spring 16 hook 17 hooked rope 18 hook 19 Color P pipe

Claims (4)

  A rotating member for winding the rope, a main body provided with a reversible preventing means capable of reversing the rotating member to prevent reverse rotation, and a hook having a proximal end attached to the main body so as to protrude outward from the main body. In the rope tensioning device, the rotating member is formed on at least one of the lateral side portions located on both sides in the left-right width direction of the rotating member through introduction holes formed at specific locations on the outer peripheral portion thereof. An rope insertion passage for taking out the rope from the lead-out hole is provided, and an operation rotary member provided with a tooth portion for meshing with a tooth portion provided on the rotary member and rotating the rotary member is provided. The rotating member of the operating rotating member is provided at a position on the opposite side of the hook with the rotating member interposed between the rotating member and the operating rotating member can be manually rotated externally with a tool. end Rope tensioning device consisting let me with a tool mounting portion to.   The rope tensioning device according to claim 1, wherein the main body includes a pair of left and right divided cases, and the rotating member, the reverse rotation preventing means, and the operating rotating member are provided in the divided case.   The rope tensioning device according to claim 1 or 2, wherein the tool is a wrench, and the mounting portion is a wrench mounting portion. The rotating member has a drum having a substantially cylindrical body portion in which a recess having an opening at one lateral side is formed at the center of rotation, and the drum is wound around the outer peripheral portion of the drum on each of the lateral side portions of the drum. A flange portion for receiving the rope to be formed, and a tooth portion formed on the outer peripheral surface of the flange portion so as to mesh with the tooth portion of the operation rotating member, and the trunk portion is an inner side forming the concave portion An annular portion, an outer peripheral surface around which a rope is wound, an outer annular portion having the flange portion, and a plurality of ribs that connect the inner annular portion and the outer annular portion in a radial direction. The rope tensioning device according to any one of claims 1 to 3.

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