JP4341637B2 - Rope tensioning device - Google Patents

Description

  The present invention is not only a rope having a small elongation such as a wire rope formed by twisting a plurality of steel wires, but also a rope or a flat belt formed by twisting, knitting or weaving natural fibers or synthetic fibers. The present invention relates to a rope tensioning device that can be applied to ropes having a large stretch.

As a prior art 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 A winding rotary member that is rotatably provided between the other end sides, and a ratchet mechanism that is provided on one outer surface of the both side plates and prevents reverse rotation of the winding rotary member. 2. Description of the Related Art A rope tensioning device is known in which an insertion hole is formed in a take-up rotating member, and a winding portion that can be wound around the insertion hole by hooking an end of the rope (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 the winding rotary member and rotated, and the rope is wound around the winding rotary member by manual operation to be tensioned.
JP 2002-147540 A (pages 1 and 2, FIGS. 1 to 5)

  The conventional rope tensioning device stretches the rope in a relaxed state by rotating and winding the winding rotary member on which the end of the rope fixed at one end is hooked. However, since the rope winding part of the rotary member for winding is a rectangular shape with a corner, it is possible to wind up a highly rigid wire rope such as a master rope made of a covered wire rope used to prevent falling at work in high places. It is not an optimal shape for the purpose of tensioning. 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 sequentially from the end of the rope, if the slack rope (excess length) is long, it takes time to wind up and the workability is inferior. There is an inconvenience that the rotating operation of the rotating member becomes heavy. In order to wind the rope of the required amount around the winding portion, it is necessary to increase the radial dimension and the width dimension of the winding rotary member, leading to an increase in size and weight of the device, In particular, there were problems such as difficulties in handling at high altitudes. In addition, every time the winding rotary member makes one rotation, it is necessary to insert the rope end side through the space surrounded by the winding rotary member, the connecting portion, and the both side plates. However, when the length from the winding rotary member to the rope end is long, the operation of passing the rope end becomes complicated.

  In addition, if the rope becomes loosely wound, it is difficult to loosen the rope simply by removing the ratchet in order to loosen the rope at the next tension of the rope, the person who supports the device, the person who reverses the handle and the person who pulls out the rope In some cases, it may be necessary to pull out the rope with a couple of people.

  Furthermore, in ropes such as ropes and belts formed by knitting or weaving natural fibers or synthetic fibers, the ropes themselves stretch relatively large due to the pulling force, so the number of times the ropes are wound around the winding rotary member. However, it is difficult to tension such ropes by using the rope tensioning device described in Patent Document 1, because the above-mentioned problem is inevitably increased and the occurrence of the above-described problem becomes remarkable.

  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 the rotary member for winding is rotated by operating a tool such as a tool, it can be operated without contacting the tool to a fixing member such as a pipe or a column that holds the hook, and the elongation is large. Even if it is ropes, it exists in the point which provides the tension device of ropes which can tension a rope easily and rapidly, without reducing operativity.

A tension device for ropes according to the present invention includes a rotary member for winding having a drum portion for winding the ropes, a reversible preventing means that can be released to prevent reverse rotation of the rotary member for winding, and a winding member. a casing for housing the rotary member and the anti-reverse means, a tensioning device for ropes comprising a hook attached to the casing, as a rotating member preparative the winding, is formed in the drum portion of the rotary member for the winding and introduction hole, arranged ropes of the insertion path provided Rutotomoni which communicates the outlet hole formed in at least one of the opposite sides of the rotary member for the winding, the flanges on both sides of the drum portion each of the flange portions A toothed portion is formed on each outer peripheral portion, and a metal reinforcing plate that reinforces the toothed portion is formed only on the outer peripheral portion of the flange portion. Thinner than So as to, both reinforcing plate from the outer surface side of the support respectively the mold both reinforcing plate insert-molded, wound rotation member using preparative made of a synthetic resin, mesh with the teeth of the rotary member preparative said winding the operating rotary member having a tooth portion for rotating the rotary member for the winding, on the opposite side of the cable within the city ring from the hook across the rotary member for the winding, the rotation of the operating rotary member the end of the shaft, but the tool mounting portion for manually operating the operation for rotating member digits set.

  Therefore, in this tensioning device, the other end of the ropes having one end fixed is taken out through the insertion path of the ropes formed on the winding rotary member, and the other end is loosened by pulling by hand. The ropes in the state can be quickly stretched (tensioned). From this state, the operating rotary member is rotated using a tool such as a wrench, and the ropes can be strongly tensioned only by winding the ropes around the winding rotary member several times (for example, about 1 to 3 rotations). it can. Moreover, since the other end of the ropes can be wound around the take-up rotating member in a state where the ropes are tensioned to some extent, at the same time, it is only wound several times. Even when the tension state is released, the ropes wound from the winding rotary member can be immediately unwound and sent out simply by releasing the reverse rotation preventing means.

Also, opposite to the hook across the rotary member for the winding because the cable sheet inside ring is provided with the operating rotary member, in particular of the rotary member for operating the tool having a large rotational oscillation range, such as wrenches When the tool is mounted on the tool mounting portion and operated, the tool does not contact the fixing member that holds the hook, and the tool can be operated in a state 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 for winding, the rotating member for winding can be rotated with a small operating force.

  Furthermore, since the other end of the ropes is fed out from the winding rotary member to the side, the other end of the ropes rotates around the length direction of the ropes every time the winding rotary member rotates. However, when the other end side of the ropes led out from the winding rotary member is short, the ropes on the other end side are rotated and absorbed, and the ropes on the other end side are long. In this case, the ropes on the other end side are absorbed by twisting. That is, every time the winding rotary member makes one rotation as in the tension device described in Patent Document 1, it is necessary to insert the end of the rope into the space surrounded by the winding rotary member, the connecting portion, and both side plates. As a result, the ropes can be wound around the winding rotary member sequentially without reducing the operability of the tensioning device, and the length is related to the length from the winding rotary member to the other end of the ropes. And ropes can be easily wound up. For this reason, not to mention ropes with small elongation, such as wire ropes made by twisting multiple steel wires, ropes and flat belts made by nesting, knitting or weaving natural fibers or synthetic fibers Even ropes having a large elongation with respect to the pulling force such as ropes can be easily and easily tensioned. Moreover, even if the length of the surplus ropes that are not tensed is long, the ropes can be easily tensed, so that it is possible to omit the measuring work of the laying length of the ropes at the site.

Furthermore, since the rotating member for winding is made of a synthetic resin in which a metal reinforcing plate for reinforcing the tooth portion is insert-molded, the strength and rigidity of the tooth portion where the greatest force acts is sufficiently obtained. While securing, the winding rotary member can be configured to be lightweight, and as a result, the entire tensioning device can be reduced in weight. In addition, flange portions are provided on both sides of the drum portion, tooth portions are formed on the outer peripheral portions of both flange portions, and reinforcing plates that reinforce the tooth portions are insert-molded on the flange portions. A rotating operation force can be applied to the taking rotary member in a well-balanced manner, and the load acting on the tooth portion can be halved. In addition, since the resin thickness of the winding rotating member on the outer surface side of the pair of reinforcing plates insert-molded on the flange portion is set to be smaller than the resin thickness on the inner surface side, the cooling rate of the reinforcing plate can be increased. The adhesion at the boundary between the reinforcing plate and the resin portion can be enhanced. Furthermore, since it is necessary to form a taper surface with a relatively large inclination angle that spreads on the outer peripheral side for smoothly guiding ropes to the drum portion side on the inner side surfaces of both flange portions, the reinforcing plate is placed on the inner surface side. It is possible to arrange the reinforcing plate closer to the external space than to arrange it on the outer surface side, thereby increasing the cooling rate of the reinforcing plate and improving the adhesion between the reinforcing plate and the resin part. it can.

Here, before the Kimakito rotary member, a substantially cylindrical inner annular portion, an outer annular portion having a drum portion and the flange portions, for connecting the inner annular portion and the outer annular portion in the radial direction Using a thing provided with a plurality of ribs is a preferred embodiment .

  Further, as the reinforcing plate, one having a tooth portion extending in the tooth portion of the winding rotary member on the outer peripheral portion is used, and when the tooth portion of the winding rotary member wears a certain amount, the outer peripheral portion of the reinforcing plate is externally provided. Setting the resin thickness of the rotary member for winding on the outer peripheral side of the reinforcing plate so that the casing comprises a pair of left and right split cases, and the rotary member for winding is in both split cases In preferred embodiments, the reverse rotation preventing means and the operation rotating member are internally provided, the tool is formed of a wrench, the mounting portion is formed of a wrench mounting portion, and the like.

  According to the rope tensioning device according to the present invention, the ropes are wound after the slackened ropes are pulled out to the outside and are stretched to some extent simply by forming the rope insertion passages in the winding rotary member. Rope can be put in tension by simply winding it around the take-up rotating member several times (for example, about 1 to 3 turns). It is possible not only to shorten the tension work time of the ropes, but also to prevent the ropes from becoming turbulent. Moreover, since the apparatus can be constructed from a capacity capable of winding the ropes around the winding rotary member several times (for example, about 1 to 3 rotations), the size and weight can be reduced accordingly.

Further, since the provided operating rotary member on the opposite side of the cable within the city ring from the hook across the rotary member for the winding, when operating by mounting the tool in the tool mounting part of the operating rotary member Not only does the tool not touch the fixing member that holds the hook, but also the tool can be easily operated in a state as far as possible from the fixing member, and the ropes can be further tensioned. Can be done quickly. If the rotating member for operation is configured to have a smaller diameter than the rotating member for winding, the rotating member for winding can be rotated with a small operating force, and the tension work of the ropes can be quickly performed with a light operating force. And there is an advantage that can be easily performed.

  Furthermore, since the other end of the ropes is fed out from the winding rotary member to the side, the other end of the ropes rotates around the length direction of the ropes every time the winding rotary member rotates. However, when the other end side of the ropes led out from the winding rotary member is short, the ropes on the other end side are rotated and absorbed, and the ropes on the other end side are long. In this case, the ropes on the other end side are absorbed by twisting. That is, every time the winding rotary member makes one rotation as in the tension device described in Patent Document 1, it is necessary to insert the end of the rope into the space surrounded by the winding rotary member, the connecting portion, and both side plates. As a result, the ropes can be wound around the winding rotary member sequentially without reducing the operability of the tensioning device, and the length is related to the length from the winding rotary member to the other end of the ropes. And ropes can be easily wound up. For this reason, not to mention ropes with small elongation, such as wire ropes made by twisting multiple steel wires, ropes and flat belts made by nesting, knitting or weaving natural fibers or synthetic fibers Even ropes having a large elongation with respect to the pulling force such as ropes can be easily and easily tensioned. Moreover, even if the length of the surplus ropes that are not tensed is long, the ropes can be easily tensed, so that it is possible to omit the measuring work of the laying length of the ropes at the site.

Furthermore, since the rotating member for winding is made of a synthetic resin in which a metal reinforcing plate for reinforcing the tooth portion is insert-molded, the strength and rigidity of the tooth portion where the greatest force acts is sufficiently obtained. While securing, the winding rotary member can be configured to be lightweight, and as a result, the entire tensioning device can be reduced in weight. In addition, flange portions are provided on both sides of the drum portion, tooth portions are formed on the outer peripheral portions of both flange portions, and reinforcing plates that reinforce the tooth portions are insert-molded on the flange portions. A rotating operation force can be applied to the taking rotary member in a well-balanced manner, and the load acting on the tooth portion can be halved. In addition, since the resin thickness of the winding rotating member on the outer surface side of the pair of reinforcing plates insert-molded on the flange portion is set to be smaller than the resin thickness on the inner surface side, the cooling rate of the reinforcing plate can be increased. The adhesion at the boundary between the reinforcing plate and the resin portion can be enhanced. Furthermore, since it is necessary to form a taper surface with a relatively large inclination angle that spreads on the outer peripheral side for smoothly guiding ropes to the drum portion side on the inner side surfaces of both flange portions, the reinforcing plate is placed on the inner surface side. It is possible to arrange the reinforcing plate closer to the external space than to arrange it on the outer surface side, thereby increasing the cooling rate of the reinforcing plate and improving the adhesion between the reinforcing plate and the resin part. it can.

  As the rotary member for winding, a substantially cylindrical inner annular portion, an outer annular portion having the drum portion and both flange portions, and a plurality of ribs that connect the inner annular portion and the outer annular portion in the radial direction If a thing provided with is used, useless meat can be reduced as much as possible, and the rotation member for winding can be constituted still more lightweight.

  Moreover, it is preferable embodiment to use what has a tooth | gear part extended in the tooth | gear part of the rotation member for winding as an outer peripheral part as said reinforcement board. In this case, the tooth portion of the winding rotary member can be more effectively reinforced by the tooth portion formed on the reinforcing plate.

  It is also preferable to set the resin thickness of the winding rotating member on the outer peripheral side of the reinforcing plate so that the outer peripheral portion of the reinforcing plate is exposed to the outside when the tooth portion of the winding rotating member is worn a certain amount. It is. If comprised in this way, the replacement time of the winding rotary member can be easily identified visually.

  In a preferred embodiment, the casing includes a pair of left and right split cases, and the rotary member for winding, the reverse rotation preventing means, and the rotary member for operation are housed in both split cases. If comprised in this way, many members built in the casing will not be exposed outside, but the impact strength of the apparatus 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.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show a rope tensioning device used for, for example, tensioning a parent rope for preventing falling during work at a high place. This rope tensioning device includes a winding rotary member 2 for winding a rope (which corresponds to ropes) 1, a reversible anti-reverse means 3 for preventing reverse rotation of the winding rotary member 2, and a winding A casing 4 that accommodates the take-up rotating member 2 and the reverse rotation preventing means 3 and a hook 5 having a base end attached to the casing 4 so as to protrude outwardly from the casing 4 are provided. The invention is not limited.

  As shown in FIGS. 2, 3 and 5, the casing 4 includes a pair of left and right divided cases 4A, 4A. In the divided cases 4A, 4A, a winding rotary member 2, a reverse rotation preventing means 3, and a later-described A rotating member for operation is provided. Although the split cases 4A and 4A are configured to be bilaterally symmetric, they can also be configured from bilaterally asymmetric split cases. Further, by forming the casing 4 from the divided cases 4A and 4A, the number of parts can be reduced and the strength can be increased as compared with a case where the casing 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 being able to avoid, there is an advantage that it is possible to avoid that other objects come into contact with the internal parts, but the casing 4 is composed of a pair of left and right side plates and a plurality of connecting brackets for connecting the side plates. It is also possible to adopt. Reference numerals R and R shown in FIG. 3 and FIG. 5 guide the rope 1 inserted into the casing 4 through the rope insertion port 4D formed in the divided cases 4A and 4A from above and below to guide the rope 1 It is a guide roller for restricting the insertion posture, and may be omitted depending on circumstances. Moreover, the code | symbol 4E shown in FIG. 2 is an opening for confirming the state in the division | segmentation cases 4A and 4A, or visualizing when the end of the rope 1 is inserted in the introduction hole 2H of the rotary member 2 for winding mentioned later. However, it is not always necessary and can be omitted.

  As shown in FIGS. 5 to 7, the winding rotary member 2 includes a cylindrical drum portion 2 </ b> A for winding the rope 1, flange portions 2 </ b> F and 2 </ b> F provided on both sides of the drum portion 2 </ b> A, The flange part 2F and the tooth part 2G formed in the outer peripheral part of 2F are provided.

  A ring-shaped reinforcing plate 2M made of a metal material is embedded in the outer peripheral portion of the flange portions 2F, 2F by insert molding, and the tooth portion 2G can be reinforced by the reinforcing plate 2M. Further, in order to sufficiently increase the strength and rigidity of the tooth portion 2G, a tooth portion 2N extending into the tooth portion 2G is provided on the outer peripheral portion of the reinforcing plate 2M. Then, the resin thickness T of the tooth part 2G outside the tooth part 2N is set to 0.5 mm to 1.5 mm, for example, and the user wears the tooth part 2G and exposes the tooth part 2N to the outside. The replacement time of the winding rotary member 2 can be grasped. Further, the embedding position of the reinforcing plate 2M with respect to the thickness direction of both flange portions 2F, 2F is set to a position slightly outside the center C in the thickness direction of the tooth tip of the tooth portion 2G, and the rotary member 2 for winding is set. The cooling rate of the reinforcing plate 2M during molding is increased to increase the adhesion between the resin portion and the metal reinforcing plate 2M. It is possible to set the reinforcing plate 2M at a position slightly inside the center C in the thickness direction of the tooth tip. However, the inner side surfaces (opposing surfaces) of both flange portions 2F and 2F go to the outer peripheral side. Therefore, since it comprises the taper surface 2R whose space | interval becomes wide, the reinforcement board 2M can be arrange | positioned on the outer surface side, and the cooling rate can be raised. In order to increase the bonding strength between the resin portion and the reinforcing plate 2M, it is also a preferred embodiment to form protrusions or holes in the reinforcing plate 2M.

  When the winding rotary member 2 having such a configuration is manufactured, the reinforcing plate 2M is placed at an appropriate position in the mold of an injection molding apparatus (not shown) having a molding space having a shape suitable for the winding rotary member 2. Is positioned and set in a state where it is hollowly supported, and then a synthetic resin material is injected into the molding space of the mold and molded. Reference numeral 2P denotes a mounting hole provided in the reinforcing plate 2M for hollowly supporting the reinforcing plate 2M in the mold, and a stepped pin provided in a protruding shape in the mold is inserted into the mounting hole 2P. The reinforcing plate 2M can be positioned and supported in the molding space of the mold. The take-up rotating member 2 can be made of a metal material such as an aluminum alloy. However, the take-up rotating member 2 can be made lighter by making it from a synthetic resin in which a metal reinforcing plate 2M is insert-molded. And reduction of material cost can be achieved.

  In order to reduce the weight of the winding rotary member 2 as much as possible, the winding rotary member 2 includes a substantially cylindrical inner annular portion 2C, an outer annular portion 2D having a drum portion 2A and both flange portions 2F, 2F. And a plurality of ribs 2E that connect the inner annular portion 2C and the outer annular portion 2D in the radial direction (radially), and form a recess 2a that opens only one lateral side in the inner annular portion 2C. A plurality of concave portions 2b partitioned by ribs 2E are formed between the inner annular portion 2C and the outer annular portion 2D, and sufficient strength and rigidity are ensured by the ribs 2E, while extra meat is reduced by the concave portions 2a and 2b. It is configured to be as light as possible. However, although the weight is somewhat heavier, the winding rotary member 2 can be made solid by omitting the recesses 2a and 2b.

  By forming shaft portions 2Q projecting outward at the left and right ends of the inner annular portion 2C, and fitting both shaft portions 2Q into through holes 4B and 4B formed at substantially the centers of the divided cases 4A and 4A, The winding rotary member 2 is rotatably supported with respect to the divided cases 4A and 4A.

  An introduction hole 2H consisting of a round hole is formed in the drum portion 2A of the winding rotary member 2, and a lead-out hole 2J consisting of a round hole is formed at one of the rotation center positions on both the left and right sides of the winding rotary member 2. An insertion passage 2L for the rope 1 that communicates the introduction hole 2H and the lead-out hole 2J is formed in the drum portion 2A. 4 and 6, the lead-out hole 2J is formed only on one side, but it may be formed on both sides so that the end of the rope 1 can be led out from either side. However, in this case, since the strength of the winding rotary member 2 is reduced, it is preferably provided only on one side. 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 of L The path may be a letter, and the shape as the path can be freely changed. The diameter of the insertion path can be set to any size as long as it is larger than the diameter of the rope 1.

  The casing 4 is provided with a pair of left and right gears 6 and 6 as operation rotating members, and the gears 6 and 6 are engaged with the teeth 2G and 2G of the winding rotation member 2 so that the winding rotation member 2 is engaged. A large number of tooth portions 6G for rotational operation are formed. Specifically, the shafts 6S and 6S are such that the gears 6 and 6 are fitted onto the rotary support shaft 7 having a hexagonal cross section so as to be integrally rotatable, and both ends of the rotary support shaft 7 protrude outward from the gears 6 and 6. Through the through holes 4F and 4F of the split cases 4A and 4A, respectively. Further, the gear 6 is provided at a position opposite to the hook 5 with the casing 4 sandwiching the winding rotary member 2, that is, on the side away from the hook 5. A tool mounting portion 7S projecting a set length from the outside is formed, and a tool is mounted on the tool mounting portion 7S so that the gears 6 and 6 can be manually rotated from the outside by the tool. Therefore, after the tip of a hexagon wrench as a tool is fitted to the tool mounting portion 7S, the gears 6 and 6 are rotated by rotating the hexagon wrench, and at the same time, the winding rotary member 2 is rotated. The rope 1 can be tensioned, and during this tensioning operation, the swinging hexagon wrench does not contact the fixing member (pipe P in the figure) that locks and fixes the hook 5. It is configured as follows.

  The hook 5 is externally slidably fitted to a collar 19 fitted and fixed to one end in the longitudinal direction of the split cases 4A and 4A. One end of the hook 5 is longer than the other end, and the base end side is Swinged by a spring (not shown) so that the base end portion of the flange member 5A is swingably connected via a pin 9 and the tip is in contact with the inner surface of the other end, which is the short side of the flange member 5A. One end of the biased locking member 5B is supported on the outer side of the base end portion of the flange member 5A via a pin 10, and the base of the locking member 5B is formed in a long hole 8A formed at the other end. There is provided a lock lever 8 that can pass through the shaft 11 provided in the extending portion that extends from the end portion and can regulate the swinging of the locking member 5B. Therefore, the shaft 11 located at one end of the long hole 8A can be moved to the other end side by swinging the lock lever 8 in the direction indicated by the arrow in FIG. By swinging the release preventing member 5B around the axis of the pin 9 in the direction of the arrow shown in FIG. 1, the hook 5 opened and locked to the pipe P shown in FIGS. 4 and 8 is locked. Although it can be canceled, other configurations may be used.

  As shown in FIGS. 3 and 5, the reverse rotation preventing means 3 is positioned between the left and right gears 6, 6 and is externally fitted to the rotary support shaft 7 in an integrally rotated state. To the pin 14 that is engaged with and fixed to the divided cases 4A and 4A in order to engage the formed claw wheel 12 with the claw 12A of the claw wheel 12 only when rotating on one side and prevent reverse rotation of the claw wheel 12. A ratchet mechanism comprising a pawl member 13 that is externally fixed and a spring 15 that swings and biases the pawl member 13 so that the pawl portion 13A of the pawl wheel 13 is engaged with the pawl 12A of the pawl wheel 12. However, other configurations may be used. The split cases 4A and 4A are formed with an opening 4C through which a finger can be inserted from the outside so that the claw member 13 engaged with the claw wheel 12 can be engaged and 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, and for 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 having 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. 8, rope tension is obtained by locking 16 to one of a pair of pipes (posts) P, P arranged at an interval of about 10 m, and hooking the other pipe P with the hook 5 on the other end. After passing through the winding rotary member 2 of the apparatus as described above, pulling the end of the rope 1 to the outside and stretching it by hand to some extent, the rope tensioning device is operated using a hexagon wrench (winding rotary member 2 is wound 1 to 3 times), and the span L 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.

  A rope called a parent rope is generally a fiber rope made of a synthetic fiber and having an outer diameter of about 16 mm, or an outer diameter of about 11 mm and a wire rope having a thickness of about 0.5 to 1 mm. A wire rope with a vinyl coating of about 12 mm is used, but ropes with other configurations may be used.

  The rope 1 is not locked only by passing through the insertion path 2L of the winding rotary member 2, but the rope 1 has an appropriate rigidity, and the rope 1 is attached to the winding rotary member 2 several times (normally 1). When it is wound, the rope 1 is not only tensioned and a frictional force with the outer peripheral surface of the winding rotary member 2 is generated, but the rope 1 is bent at the introduction hole 2H of the insertion passage 2L. For the reason, an appropriate movement resistance force is generated in the insertion passage 2L, and the escape of the rope 1 is restricted.

  In the above embodiment, the tension device provided with the winding rotary member 2 for winding the fiber rope formed by twisting synthetic fibers or the wire rope formed by twisting steel wires is described. A winding rotary member that winds up ropes made of a flat belt formed by knitting or weaving fibers can be provided, and the tensioned flat belt can be used as a tensioning device capable of tensioning.

  Specifically, as shown in FIGS. 9 to 11, as the winding rotary member 20, instead of the insertion passage 2 </ b> L having the round hole-like introduction hole 2 </ b> H and the lead-out hole 2 </ b> J of the winding rotary member 20. In addition, a slit-like introduction hole 22 elongated in the direction of the rotation center in the drum portion 21, a slit-like lead-out hole 23 elongated in the diameter direction on one side of the winding rotary member 20, and the introduction hole 22 and the lead-out hole 23 communicate with each other. Each of the insertion passages 24 is provided, and the insertion passage 24 is provided so as to be inclined with respect to the rotation center of the winding rotary member 20. The same members as those in the above embodiment are given the same reference numerals, and detailed description thereof is omitted.

  Then, as shown in FIG. 12, the winding rotary member 20 is replaced with the winding rotary member 2 in the tensioning device to constitute a tensioning device, and the other end portion of the flat belt 25 introduced into the casing 4 is The flat belt 25 is introduced into the insertion passage 24 from the introduction hole 22 and fed out from the lead-out hole 23, and the tensioned flat belt 25 is tensioned. Then, the winding rotary member 20 is rotated to bring the flat belt 25 into the drum portion 2A. On the other hand, the flat belt 25 is wound in a substantially concentric manner so that the necessary tension acts on the flat belt 25 stretched.

  As the flat belt 25, for example, a standard belt having a thickness of about 1.0 mm and a width of about 2.5 mm formed by knitting synthetic fibers such as polyester can be applied. Since such a flat belt 25 has flexibility, as shown in FIG. 10, the concave portion 2b and the rib 2E can be omitted and the drum portion 21 can be configured to have a small diameter, and the flat belt wound around the drum portion 21 can be formed. The length of 25 can be set longer. For this reason, the flat belt 25 formed by knitting or weaving synthetic fibers extends relatively greatly with respect to the pulling force, but the flat belt 25 having a sufficient length can be wound around the drum portion 2A. As a result, the flat belt 25 can be tensioned without difficulty.

It is a top view of a rope tensioning device. It is a side view of a rope tensioning device. It is a cross-sectional view of a rope tensioning device. It is a longitudinal cross-sectional 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 the rotating member for winding. It is a partially notched top view of the rotating member for winding. 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. It is a perspective view of the rotation member for winding which winds up a flat belt. It is sectional drawing of the rotation member for winding. It is a partially notched top view of the rotation member for winding. It is a longitudinal cross-sectional view of the rope tensioning device incorporating the winding rotary member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rope 2 Rotating member 2a Recessed part 2b Recessed part 2A Drum part 2C Inner ring part 2D Outer ring part 2E Rib 2F Flange part 2G Tooth part 2H Introduction hole 2J Lead-out hole 2L Insertion path 2M Reinforcement plate 2N Tooth part 2P Mounting hole 2Q Shaft portion 2R Tapered surface 3 Reverse rotation prevention means 4 Casing 4A Split case 4B Through hole 4C Opening 4D Rope insertion port 4E Opening 4F Through hole 5 Hook 5A Scissor member 5B Detachment member 6 Gear 6G Tooth portion 6S Shaft portion 7 Rotating support shaft 7S Tool mounting part 8 Lock lever 8A Long hole 9 Pin 10 Pin 11 Shaft 12 Claw wheel 12A Claw 13A Claw part 13 Claw member 14 Pin 15 Spring 16 Hook 17 Rope with hook 18 Hook 19 Collar 20 Rotating member for winding 21 Drum part 22 Introduction hole 23 Lead-out hole 24 Insertion passage 25 Flat belt P Pipe R Guide roller

Claims (6)

A winding rotary member having a drum portion for winding the ropes, a reversible anti-reverse means for preventing reverse rotation of the winding rotary member, and a casing for housing the winding rotary member and the reverse rotation preventing means; A rope tensioning device comprising a hook attached to the casing,
As the winding rotary member, there is provided an insertion path for ropes that communicates the introduction hole formed in the drum portion of the winding rotary member and the lead-out hole formed in at least one of both side portions of the winding rotary member. In addition, flange portions are provided on both sides of the drum portion, tooth portions are formed on the outer peripheral portions of both flange portions, and metal reinforcing plates that reinforce the tooth portions are provided only on the outer peripheral portion of the flange portions. Synthetic resin in which both reinforcing plates are insert-molded by supporting both reinforcing plates on the mold from the outer surface side so that the resin thickness of the flange portion on the outer surface side of the reinforcing plate is thinner than the resin thickness on the inner surface side Using a rotary member for winding consisting of
Wherein the operating rotary member having a tooth portion for rotating the rotary member for the winding mesh with the teeth of the rotary member for the winding, the opposite side to the hook across the rotary member for the winding cable Shi Provided in the ring,
A tool mounting portion for manually operating the operating rotary member is provided at the end of the rotary shaft of the operating rotary member .
A rope tensioning device characterized by that. As the rotary member for winding, a substantially cylindrical inner annular portion, an outer annular portion having the drum portion and both flange portions, and a plurality of ribs that connect the inner annular portion and the outer annular portion in the radial direction The rope tensioning device according to claim 1 , wherein the rope tensioning device is used. The rope tensioning device according to claim 1 or 2 , wherein the reinforcing plate has a tooth portion extending in a tooth portion of a winding rotary member on an outer peripheral portion. As the outer peripheral portion of the reinforcing plate and the teeth of the rotary member preparative said winding is a certain amount worn is exposed to the outside, the reinforcement plate of claim 1 to 3 in which the resin thickness of the rotary member for the winding on the outer peripheral side set of A rope tensioning device according to any one of the preceding claims. The rope according to any one of claims 1 to 4 , wherein the casing is composed of a pair of right and left split cases, and the rotary member for winding, the reverse rotation preventing means, and the rotary member for operation are housed in both split cases. Kind of tension device. The tool is made of a wrench, the tightening device of the ropes of any one of claims 1 to 5, wherein the mounting portion is made of a wrench mounting portion.

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