JP4391763B2 - Rope tensioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rope tensioner that is used when a master rope (rope) is stretched at a high working position.
[0002]
[Prior art]
In general, when working at a high place, a safety belt for working at a high place is wrapped around the operator's waist, and the hook at the tip of a rope with a hook connected to the safety belt is engaged with an engagement object such as a structure. Together, ensuring safety.
[0003]
By the way, at the work site, there is a case where there is no object to be engaged in the work range of the worker or it is difficult to remove the hook. In addition, since it is necessary to change hooks every time the work position is changed in a wide work range, the work efficiency is remarkably lowered, and safety can be ensured when changing hooks. There is a danger of falling because it cannot.
[0004]
In the above-mentioned high-altitude work positions, usually, a rope as a parent rope is stretched almost horizontally, and a hook of a rope with a hook connected to a safety belt is engaged with the rope to ensure safety. Has been done.
[0005]
A rope tensioner is used for tensioning the rope. As the rope tensioner, a rope whose one end is engaged with the object to be engaged is inserted between the rope support body and the rope pressing body, and the rope is tensioned by pulling the end of the rope. 2. Description of the Related Art Conventionally, a rope tensioner is known in which a rope pressing body is engaged with a rope to hold the rope in a tensioned state (see Patent Document 1).
[0006]
The rope tensioner has a feature that the rope can be securely clamped because the pressure contact engagement force of the engagement claws gradually increases as the tensile load applied to the rope increases.
[0007]
[Patent Document 1]
Utility Model Registration No. 2601842 (Page 4 , Fig. 3)
[0008]
[Problems to be solved by the invention]
By the way, in the rope tensioner described in the above-mentioned Patent Document 1, when the operator falls off the foot and falls, and the worker is received by the rope, the rope presser is strongly engaged with the rope, Since the impact force applied to the rope is received only at the engagement position, the rope may be broken.
[0009]
The subject of this invention is providing the rope tensioner excellent in safety | security which can prevent the fracture | rupture of a rope almost certainly.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, in the first invention, a rope holder having a rope guide portion and a rope that is swingably supported by the rope holder and inserted between the rope guide portion and the rope holder. And an elastic member that urges the engaging claw in a direction in which the engaging claw is press-engaged with the rope, and is provided between the rope guide portion and the engaging claw. In the rope tensioner that holds the rope in tension by press-engaging the engaging claws to the inserted rope, a rope reversing guide for reversing the rope is provided on the rope introduction side of the rope guide, and along the reversing guide A configuration is adopted in which the engaging claw swings in a direction in which the engagement with the rope is released by pulling the folded-back side rope .
[0011]
In order to tension a rope using the rope tensioner having the above-described configuration, hooks are attached to one end of the rope and the rope tensioner, each hook is engaged with an object to be engaged, and the other end of the rope. Fold along the outer periphery of the rope reversing guide, insert the folded side rope between the rope guide and the engaging claw, pull the above folded side rope to tension the rope, and press the engaging claw against the rope. Combine and hold the rope in tension.
[0012]
As described above, the rope is inserted from the rope reversing guide between the rope guide portion and the engaging claw, and the operator is dropped by holding the rope in a tensioned state by the press-fitting engagement of the engaging claw. When the rope is received by the rope, a very large tensile load applied to the rope is received and reduced by the contact portion between the rope reversing guide and the rope. For this reason, the press-contact engagement force with respect to the rope of the engagement claw does not increase extremely, and the rope can be effectively prevented from breaking.
[0013]
In order to solve the above-mentioned problems, in the second invention, a rope holder having a rope guide portion, a guide support frame provided opposite to the rope holder, and the guide support frame and the rope holder are translated. A pair of parallel links that can be connected to each other and an elastic member that elastically deforms when the parallel links fall down and urges the parallel links in a direction to stand up by its restoring elasticity. An engaging claw portion that presses and engages the rope inserted between the rope guide portion and the rope guide side of the rope guide portion is reversed in the guide support frame. rope reversing guide is provided, the configuration thereof the engaging pawl by the operation of pulling the folded side rope folded along the reverse guide was made to swing in a direction to release the engagement against the rope It has been adopted.
[0014]
In the second aspect of the invention, the rope is folded back along the outer periphery of the rope reversing guide, the folded side rope is inserted between the rope guide portion and the pair of engaging claws, and the engaging claw portion is folded on the folded side rope. To keep the rope in tension.
[0015]
Also in the second aspect of the invention, the extremely large tensile load applied to the rope when the operator receives the fall is received and reduced by the contact portion between the rope reversing guide and the rope. For this reason, the press-contact engagement force of the engagement claw does not increase extremely, and the rope breakage can be effectively prevented.
[0016]
In 3rd invention, the structure which provided the rope guide groove in the outer periphery of the rope inversion guide in the said 1st invention and 2nd invention is employ | adopted.
[0017]
Here, the rope guide groove may be a V-shaped groove or an arc-shaped groove.
[0018]
As described above, when the rope guide groove is provided in the rope reversing guide, the contact resistance to the rope can be increased, so that the pressure contact engagement force of the engagement claw or the engagement claw portion can be further reduced, and the rope breaks. Can be prevented more reliably.
[0019]
According to a fourth aspect of the present invention, in the first to third aspects of the present invention, a configuration is adopted in which a rope guide for preventing the rope from coming off the rope reversing guide is provided on the rope introduction side of the rope reversing guide. Yes.
[0020]
By providing the rope guide as described above, the rope is always held in contact with the rope reversing guide, so that the tensile load applied to the rope is reliably received at the contact portion between the rope reversing guide and the rope. Can do.
[0021]
In order to solve the above-mentioned problem, in the fifth invention, a pair of side plates is provided on both sides of a rope guide portion having a U-shaped cross section, and the rope guide is substantially parallel to the rope guide portion between the side edges of the pair of side plates. A rope holder provided with a rope reversing guide for reversing the rope inserted into the rope guide and guiding it to the rope guiding portion, and an engaging claw capable of being press-engaged with the rope inserted into the rope guiding portion When the engagement claw by operating the engaging claw is Ri consists an elastic member for urging the engagement pawl in the direction of pressure contact engagement with the rope, pulling the folded side rope folded along the rope reversing guide However , it adopts a configuration that swings in a direction to release the engagement with the rope .
[0022]
In the rope tensioner configured as described above, the rope inserted into the rope guide is folded along the outer periphery of the rope reversing guide, the folded side rope is inserted between the rope guide portion and the engaging claw, and the folded side The rope is tensioned by pulling the rope, and the engaging claw is press-engaged with the folded-back side rope to hold the rope in a tensioned state.
[0023]
Even in the above rope tensioner, the large tension load applied to the rope when receiving the fall of the operator is received and reduced at the contact portion between the rope reversing guide and the rope, so the pressure engagement force of the engaging claw is extremely increased. Without breaking the rope effectively.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment of a rope tensioner according to the present invention.
[0025]
As shown in the drawing, the rope holder 1 is provided with a pair of side plates 3 on both sides of a rope guide portion 2 having a U-shaped cross section, and a serrated projection 4 extending in the circumferential direction is formed on the inner surface of the rope guide portion 2. The rope guide portion 2 is formed at intervals in the length direction.
[0026]
A fulcrum pin 5 is passed between the pair of side plates 3 , and an engaging claw 6 is swingably supported around the fulcrum pin 5. The engaging claw 6 is substantially fan-shaped, and the rope pressing surface 6 a on the outer periphery thereof can be engaged with the rope L ₁ inserted through the rope guide portion 2.
[0027]
Rope pressing surface 6a is a cross-sectional circular arc shape along the outer periphery of the rope L _1, the length of up to fulcrum pin 5 of the rope pressing surface 6a gradually increases from one end to the other end, engagement claws 6 standing so that the pressure contact engagement force against the rope L ₁ gradually increases accordingly.
[0028]
Also, the rope pressing surface 6a engageable twist projection 6b is provided at intervals in the circumferential direction with respect to the spiral flutes of rope L _1.
[0029]
The engaging claw 6 is urged in a direction of press-engaging with the rope L ₁ by an elastic member 7 supported by the fulcrum pin 5.
[0030]
A rope inversion guide 8 is provided on the rope introduction side of the rope guide portion 2. The rope reversal id 8 comprises a roll, and a guide groove 8a is provided on the outer periphery thereof.
[0031]
Here, as shown in FIG. 2, the guide groove 8a may be an arcuate groove or a V-groove.
[0032]
The rope reversing guide 8 is supported by a pair of support pieces 9 fixed to the pair of side plates 3 of the rope holder 1. The rope inversion guide 8 may be a non-rotating support or a rotatable support.
[0033]
A rope guide 10 is provided on the rope introduction side of the rope reversing guide 8. The rope guide 10 has a U-shape, and both end portions thereof are fixed to the pair of side plates 3 of the rope holder 1. The rope guide 10 prevents the rope L ₀ attached to the outer periphery of the rope reversing guide 8 from coming off the rope reversing guide 8.
[0034]
One end of a connector 12 is flexibly connected to the distal ends of the pair of side plates 3 of the rope holder 1 via a connecting pin 11, and a hook 14 is connected to the other end of the connector 12 via a connecting pin 13. It is connected flexibly.
[0035]
Here, the connecting tool 12 rotatably supports two U-shaped frames 12a and 12a by pins 12b.
[0036]
The first rope tension device shown in the embodiment consists structure described above, when stretched rope L ₀ is as shown in FIG. 4, linked not shown hooks and tensioner of one end of the rope L ₀ Each of the hooks 14 connected to the rope holder 1 is engaged with the engagement object X. Then, the rope and the other end of the rope L ₀ as shown in FIG. 1 and FIG. 4, while inserted into the inside of the rope guide 10, folding wound on the outer periphery of the rope reversing guide 8, the folded side rope L ₁ with inserted between the guide portions 2 and the engaging claw 6, a rope L ₀ is tensioned by pulling the folded side ropes L _1, mixture was allowed to moderately tense the rope L _0, to release the tension.
[0037]
By the release of the tensile force, the engaging claw 6 is pressed engaged with the folded side rope L ₁ by the elastic force of the elastic member 7, a rope L ₀ by the pressure engagement is maintained in tension.
[0038]
When working at high altitudes, a safety belt for working at high altitudes is wrapped around the operator's waist, and the hook at the tip of the rope with hooks connected to the safety belt is engaged with the rope L ₀ for safety. Secure.
[0039]
In an operation at a high place, if an operator steps off and falls, the rope with a hook falls until it becomes tense, and the worker is prevented from being caught by the rope with the hook and falling.
[0040]
When receiving falling worker is very large tensile load acts on the rope L _0. The tensile load is reduced as received at the contact portion of the rope reversing guide 8 rope L _1, mitigated tensile load is to being received by the pressure-engaging portion of the folded side rope L ₁ and the engaging claw 6 .
[0041]
Therefore, without pressure contact engagement force of the engagement claws 6 becomes extremely strong, folded side rope L ₁ is nor broken.
[0042]
FIG. 5 shows a second embodiment of the rope tensioner according to the present invention. The rope tensioner shown in the second embodiment includes a rope holder 21, a guide support frame 22 provided opposite to the rope holder 21, and a pair of parallel links that connect the rope holder 21 and the guide support frame 22. 23.
[0043]
The rope holder 21 is provided with a pair of side plates 25 on both sides of a U-shaped rope guide portion 24, and a sawtooth-shaped protrusion 26 is provided on the inner surface of the rope guide portion 24.
[0044]
The guide support frame 22 is provided with a pair of side plates 28 on both sides of the U-shaped bent portion 27, and a support piece 29 facing the end of the rope guide portion 24 on the rope introduction side is continuously provided on one end portion of each side plate 28. ing.
[0045]
One end of the parallel link 23 is disposed between the pair of side plates 25 of the rope holder 21 and is rotatably connected to the side plate 25 by pins 30. The other end of the parallel link 23 is disposed between the pair of side plates 28 of the guide support frame 22 and is rotatably connected to the side plate 28 by pins 31.
[0046]
An elastic member 32 is supported on a pin 31 that connects the other end of the parallel link 23 to the side plate 28 of the guide support frame 22, and the elastic member 32 applies an elastic force in a direction in which the parallel link 23 is raised.
[0047]
Engagement claw portions 33 are connected to one end portion of the parallel link 23, and each engagement claw portion 33 can be press-engaged with the rope L ₁ inserted through the rope guide portion 24. Also, pressure contact engaging surface 33a of the engagement claw portion 33, the rope L ₁ as the length of the pin-up 30 for connection to the rope holder 21 gradually increases from one end to the other end, the parallel link 23 is erected The pressure contact engagement force with respect to is gradually increased.
[0048]
A rope reversing guide 34 is supported between the distal ends of a pair of support pieces 29 provided continuously to the side plate 28 of the guide support frame 22. The rope reversing guide 34 is composed of a roller, and a guide groove 34a is provided on the outer periphery. The rope reversing guide 34 may be a non-rotating support or a rotatable support.
[0049]
A rope guide 35 is provided on the rope introduction side of the rope reversing guide 34. The rope guide 35 is formed of a U-shaped frame, and both ends thereof are fixed to the rope holder 21. The rope guide 35 is a rope L ₀ having been subjected to the guide groove 34a of the rope reversing guide 34 is prevented from disengaging from the guide groove 34a.
[0050]
A hook 37 is connected to the guide support frame 22 via a connector 36. The connector 36 has the same configuration as the connector 12 shown in the first embodiment.
[0051]
Rope tensioner shown in the second embodiment consists structure of the other end of the rope L ₀ having one end locked to the engagement object is inserted into the rope guide 35, the rope reversing guide 34 It is folded around the outer periphery. Also, the folded side rope L ₁ is inserted between the rope guide portion 24 and the engagement claw portion 33, the rope L ₀ is the tension by pulling the folded side rope L _1, engagement with the folded side rope L ₁ rope L ₀ by pressure engagement of the pawl portion 33 is held in tension.
[0052]
The In the second embodiment, since the provided rope reversing guide 34 on the rope inlet side of the rope guiding portion 24, upon receiving falling worker tensile load is impulsively loaded rope L ₀ is the rope inverted is reduced at the contact portion of the guide 34 and the rope L _0, mitigated tensile force is to be received by the pressure-engaging portion of the engaging claw portion 33 and the rope L _1. Further, since the two engaging claws 33 are provided, the reduced tensile force is further divided into two equal parts. As a result, the pressure contact engaging force of the engaging claws 33 is relatively small, and the rope L ₁ Breakage can be prevented more effectively.
[0053]
6 and 7 show a third embodiment of the rope tensioner according to the present invention. In the rope tensioner shown in this embodiment, the rope holder 51 is provided with a pair of side plates 53 on both sides of a rope guide portion 52 having a U-shaped cross section, and the rope guide portion 52 is provided between the side edges of the pair of side plates 53. A rope guide 54 having a substantially parallel U-shaped section is provided.
[0054]
A fan-shaped engagement claw 55 is provided between the pair of side plates 53 of the rope holder 51. The engaging claw 55 is supported so as to be swingable around a fulcrum pin 56 supported at both ends by a pair of side plates 53, and the outer rope pressing surface 55 a is against the rope inserted into the rope guide portion 52. Thus, press contact engagement is possible.
[0055]
The rope pressing surface 55a has an arc shape in cross section, similar to the rope pressing surface 6a of the engaging claw 6 shown in the first embodiment of FIG. 1, and the length of the rope pressing surface 55a to the fulcrum pin 56 is from one end. By gradually swinging toward the other end and swinging toward the rope guide portion 52, the pressure contact engagement force with respect to the rope gradually increases. The rope pressing surface 55a is provided with twisting protrusions 55b that can be engaged with the twisting grooves of the rope at intervals in the circumferential direction.
[0056]
Furthermore, a tool insertion hole 57 for inserting a tool such as Shino and a fingertip engagement piece 58 are provided in the vicinity of the tool insertion hole 57 at the end of the rope pressing surface 55a.
[0057]
The engaging claw 55 is urged toward the rope guide portion 52 by an elastic member 59 supported by the fulcrum pin 56.
[0058]
A semicircular rope reversing guide 60 is provided between the ends of the pair of side plates 53 of the rope holder 51, and a guide groove 60 a having an arcuate cross section is formed on the outer periphery of the rope reversing guide 60. The rope reversing guide 60 is supported by the pin 61 at the center of the arcuate outer periphery, and the protrusions 62 provided on the outer periphery of both sides are fitted into the notches 63 formed in the pair of side plates 53 to support non-rotation. It is said that.
[0059]
One end of a connector 12 having the same configuration as that of the connector 12 shown in FIG. 1 is connected to the pin 61, and the hook 14 is connected to the other end of the connector 12 via a connecting pin 13.
[0060]
The rope tensioner shown in the third embodiment has the above-described configuration. When the rope L ₀ whose one end is locked to the engagement object is stretched, the rope L ₀ is inserted into the rope guide 54. folded rope L ₀ by along the rope L ₀ on the outer periphery of the rope reversing guide 60, after inserting the folded side rope L ₁ between the rope guide portion 52 and the engaging claw 55, the folded side rope L ₁ pull tensing rope L _0, the engagement claws 55 on the folded side ropes L ₁ by pressing-engaged to hold the rope L ₀ in tension.
[0061]
Here, because it is substantially parallel to the rope guide 54 folded side rope L rope guide portion 52 ₁ is inserted rope L ₀ is inserted, the rope L ₀ by pulling the folded side rope L ₁ when tensioning, the folded side ropes L ₁ is a state of substantially parallel to the rope L _0.
[0062]
Therefore, it is possible to tension less loss when the tensile force pull the folded side rope L ₁ is transmitted to the rope L _0, a rope L ₀ smoothly.
[0063]
When loosening the rope L ₀ is to swing the engaging claw 55 in the disengaging direction. At this time, the engagement claws 55 are bite strongly folded side rope L _1, it is difficult to swing the engaging claw 55 in the disengaging direction. In this case, the engaging claw 55 can be easily swung in the disengagement direction by inserting a tool such as Shino into the tool insertion hole 57 and pulling it up, or by engaging the fingertip with the fingertip engaging piece 58 and pulling it up. Can be made.
[0064]
In the third embodiment, the rope guide portion 52 provided in the rope holder 51 has a U-shaped cross section. However, as shown in FIG. 8 , the folding side rope L ₁ is held by the engaging claw 55. The surface 52a may be a U shape with a flat surface. When the cross-sectional shape of the rope guide portion 52 and U-shaped, it is possible to increase the distance S side edges and sandwiching surface 52a of the rope pressing surface 55a of the engagement claws 55, extending pulling aliasing side rope L ₁ field is the folded side rope L _1, even if the rope diameter becomes smaller can be reliably clamped by the engaging claw 55.
[0065]
FIG. 9 shows a fourth embodiment of the rope tensioner according to the present invention. In the rope tensioner shown in this embodiment, a long hole 65 for tool insertion is formed in the side plate 53 of the rope holder 51, and a tool insertion hole 66 is provided in the engaging claw 55 at a position corresponding to the long hole 65. rope tensioner showing the third embodiment of FIG. 6 in that there to be different.
[0066]
For this reason, the same code | symbol is attached | subjected to the same component as the rope tensioner shown in 3rd Embodiment, and description is abbreviate | omitted.
[0067]
As shown in the fourth embodiment, when a long hole 65 is formed in the side plate 53 and the tool insertion hole 66 is provided on the side surface of the engagement claw 55, a tool is inserted into the tool insertion hole 66 or the tool is inserted. no inconvenience ropes L0 and folding side ropes L ₁ is in the way the operation to raise, it is possible to operational improvement in the case of disengaging the engagement claws 55.
[0068]
Note that a fingertip may be inserted into the long hole 65, and the fingertip may be engaged with the tool insertion hole 66 to swing the engagement claw 55 in the disengagement direction.
[0069]
FIG. 10 shows a fifth embodiment of the rope tensioner according to the present invention. In the rope tensioner shown in this embodiment, the rope guide 54 is formed into a cylindrical shape, the rope reversing guide 60 is rotatably supported as a circle, and the pair of side plates 53 are extended forward from the rope reversing guide 60. 9 is different from the rope tensioner shown in the fourth embodiment in FIG. 9 in that the hook 14 is connected to the connecting pin 13 provided at the extended end.
[0070]
For this reason, the same code | symbol is attached | subjected to the same component as the rope tensioner shown in 4th Embodiment, and description is abbreviate | omitted.
[0071]
As shown in the fifth embodiment, by the rope guide 54 and cylindrical, oscillatory movement of a rope tensioner during operation for tensioning the rope L ₀ can be suppressed, thereby tensioning the rope L ₀ more smoothly be able to.
[0072]
In FIG. 1 and FIG. 5, serrated projections 4 and 26 are provided on the inner surfaces of the rope guide portions 2 and 24 to increase the engagement force between the inner surfaces of the rope guide portions 2 and 24 and the return side rope L _1. While preventing sliding of L _1, FIG. 11 (I), as shown in (II), a linear slip projections 4a of the rope guide portion 2 extending in the width direction on the inner surface of the rope guide portion 2,24 , 24 may be provided at equal intervals in the length direction. Alternatively, as shown in FIG. 11 (III), lattice-shaped anti-slip protrusions 4 b may be provided on the inner surfaces of the rope guide portions 2 and 24. The anti-slip protrusions 4a and 4b as described above may be provided on the inner surface of the rope guide portion 52 shown in FIGS. 6 , 7 , 9 and 10 .
[0073]
As shown in FIGS. 11 (I) to (III), by providing the anti-slip protrusions 4a and 4b, the rope L ₁ can be prevented from loosening, and a plurality of strands forming the rope L ₁ can be obtained. it is possible to impart substantially the same resistance to each, mention may be made of the effect in preventing breakage of the rope L _1.
[0074]
【The invention's effect】
As described above, any of the inventions according to claims 1 to 5 can receive and reduce the tensile load applied to the rope at the contact portion between the rope reversing guide and the rope. Without engaging, the rope can be effectively prevented from breaking.
[Brief description of the drawings]
1 is a longitudinal front view showing a first embodiment of a rope tensioner according to the present invention. FIG. 2 is a plan view of FIG. 1. FIG. 3 is a left side view of FIG. FIG. 5 is a longitudinal front view showing a second embodiment of a rope tensioner according to the present invention. FIG. 6 is a longitudinal front view showing a third embodiment of the rope tensioner according to the present invention. 7 is a partially cutaway side view of FIG . 6. FIG . 8 is a partially cutaway side view showing another example of a rope guide. FIG. 9 is a longitudinal front view showing a fourth embodiment of the rope tensioner according to the present invention . FIG . 10 is a longitudinal front view showing a fifth embodiment of the rope tensioner according to the present invention. FIG. 11 ( I) is a side view showing another example of the rope guide portion, and (II) is (I). (III) is a cross-sectional plan view showing still another example of the rope guide [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rope holder 2 Rope guide part 6 Engagement claw 8 Rope inversion guide 8a Guide groove 10 Rope guide 21 Rope holder 22 Guide support frame 23 Parallel link 32 Elastic member 33 Engagement claw part 34 Rope inversion guide 34a Guide groove 35 Rope guide 51 Rope holder 52 Rope guide portion 53 Side plate 54 Rope guide 55 Engaging claw 59 Elastic member 60 Rope inversion guide

Claims (5)

A rope holder having a rope guide portion, an engagement claw supported by the rope holder so as to be swingable, and press-engageable with a rope inserted between the rope guide portion, and the engagement claw An elastic member that urges the engaging claw in a direction of press-engaging with the rope, and presses and engages the engaging claw with the rope inserted between the rope guide portion and the engaging claw. In the rope tensioner to be held in a tension state, a rope reversing guide for reversing the rope is provided on the rope introduction side of the rope guide, and the engaging claw is moved by pulling the folded back rope along the reversing guide. A rope tensioner characterized by swinging in a direction to release engagement with a rope. A rope holder having a rope guide, a guide support frame provided opposite to the rope holder, a pair of parallel links linking the guide support frame and the rope holder so as to be movable in parallel, and when the parallel link is overturned A rope that is elastically deformed and that is elastically biased in the direction of standing up the parallel link by its restoring elasticity, and is inserted into the parallel link between the rope guide portion when swinging in the standing direction An engaging claw portion that is press-engaged with the rope is provided continuously, and a rope reversing guide that reverses the rope is provided on the rope introduction side of the rope guiding portion on the guide support frame, and the folded side that is folded back along the reversing guide A rope tensioner characterized in that the operation of pulling the rope swings the engagement claw in a direction to release the engagement with the rope.   The rope tensioner according to claim 1 or 2, wherein a rope guide groove is provided on an outer periphery of the rope reversing guide.   The rope tensioner according to any one of claims 1 to 3, wherein a rope guide for preventing the rope from being detached from the rope reversing guide is provided on a rope introduction side of the rope reversing guide. A rope holder provided with a pair of side plates on both sides of a rope guide portion having a U-shaped cross section, and a rope guide provided substantially parallel to the rope guide portion between the side edges of the pair of side plates, and inserted into the rope guide. A rope reversing guide for reversing the rope and guiding it to the rope guiding portion, an engaging claw capable of being press-engaged with the rope inserted through the rope guiding portion, and a direction in which the engaging claw is in pressure-engaging engagement with the rope And an elastic member that urges the engagement claw, and the operation of the engagement claw swinging in a direction to release the engagement with the rope by pulling the return side rope that is folded along the rope reversing guide. rope tensioner you, characterized in that.

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