JP4855424B2 - Safety belt strap winder and safety belt - Google Patents

Description

  The present invention relates to a safety belt used for work at high places and the like, and a strap winder used for the safety belt.

  The safety belt for working at high places includes a strap having a hook connected to the tip thereof. This strap is a lifeline. This strap is housed in a strap winder attached to the waist belt. An altitude worker wraps a safety belt on the body. A hook connected to the tip of the strap is locked to the structure. When an aerial worker works in a certain range, the strap is unwound from the strap winder according to the work position. The maximum length of the strap that can be unwound from the strap winder is fixed in advance. In the unlikely event that an operator falls from a high place, this safety belt prevents the operator from falling.

  There are strap winders that are used with the length required for the work and the strap feedout being locked. In this strap winder, the strap loosens when it moves within the locked length range. The slack strap may get caught in the structure and the operator may become unstable. Moreover, if the strap is caught by a sharp structure, it may be cut. Furthermore, in the unlikely event that the operator falls, the strap will fall for the length that the strap is locked. When the strap is locked long, the drop impact load is large. There is a great risk of crashing into the underlying structure. If there is a large amount of lateral shaking due to falling, there is a risk of crashing into the lateral structure.

  On the other hand, there is a strap winder having a constant winding function. In this strap winder, when the worker leaves the position where the hook is locked, the strap is unwound according to the distance. When the operator approaches the position where the hook is locked, the strap is wound so that the strap is not loosened by the continuous winding function. This strap winder avoids the risk of strap slack. However, when the operator falls, the strap is drawn out over the entire length, and the fall distance becomes long. With this strap winder, the drop impact load may increase. This strap winder also increases the risk of collision with the structure due to falling.

  In order to ensure safety by shortening the fall distance when an operator falls, a strap winder having a function of preventing a sudden belt feeding at the time of dropping has been proposed. This strap winder is disclosed in Japanese Utility Model Registration No. 3097943 and Utility Model Registration No. 3097944.

These strap winders are provided with a centrifugal claw that operates by centrifugal force and a claw receiving portion that engages with the centrifugal claw. Centrifugal force acts on the sudden extension of the strap. The centrifugal claw engages with the claw receiving portion by this centrifugal force. This engagement prevents the drum from rotating. As a result, the feeding of the strap wound around the drum is prevented. Should an operator fall from a high place, the strap will be rapidly unwound from the strap winder. The rapid rotation of the strap prevents the drum from rotating. This strap winder has a short unfolded strap length when dropped. With this strap winder, the operator's fall distance is short. The drop impact load is small. The risk of collision with the structure is reduced.
Utility Model Registration No. 3097943 Utility Model Registration No. 3097944

  The hook of the safety belt is preferably locked to a structure above the worker. Should an operator fall from a high place, the strap will fall a distance from the hook locking position. An operator's fall distance is shortened because a hook is latched by an upper structure. The drop impact load is small due to the short drop distance. The risk of colliding with the underlying structure is also suppressed. However, in order for the worker to engage the hook during work, the lower structure such as a foot is attached more easily. In the conventional strap winder, the strap can be fed out in any of the upward, horizontal and downward directions. When the hook is locked to the lower structure, the fall distance becomes longer. The danger increases as the fall distance increases.

  Even if an operator is instructed to engage a hook with an upper structure, it is not always protected. In some cases, it is easier to engage the hook with the structure under the foot than with the upper structure. Worker safety must be ensured.

  An object of the present invention is to provide a strap winder provided with a feeding direction restricting mechanism for restricting the feeding direction of the strap from the strap winder and a safety belt provided with the winder.

  The safety belt winder according to the present invention includes a frame, a drum rotatably attached to the frame, a strap wound around the drum, and a strap feeding direction regulating mechanism. The winder is configured such that when the strap is unwound, the drum rotates in one rotation direction, and when the drum rotates in the other rotation direction, the strap is rewound. In this winder, when receiving a force to draw the strap downward, the strap feeding direction restricting mechanism prevents the rotation of the drum in one rotation direction and prevents the strap from being drawn.

  The safety belt winder according to the present invention includes the following one feeding direction regulating mechanism. One strap feeding direction restricting mechanism includes a ratchet gear that is rotatably attached to the drum, a lever that is rotatably attached to the frame, and a predetermined distance in the radial direction of the ratchet gear from the ratchet gear. And an elastic body. The ratchet gear has teeth. The lever includes a main body, a guide portion, and an arm. The guide part is located in the vicinity of the strap feeding opening. The arm is located between the ratchet gear and the stopper. The arm is urged against the stopper by an elastic body. The strap feeding direction regulating mechanism is configured such that when the strap is drawn downward, the guide portion is rotated downward, and the arm is rotated and engaged with the teeth of the ratchet gear. The strap feeding direction regulating mechanism is a mechanism that prevents the rotation of the drum in one rotation direction in which the strap is drawn out by this engagement.

  The safety belt winder according to the present invention includes the following other feeding direction regulating mechanism. The other strap feeding direction regulating mechanism includes a ratchet gear rotatably attached to the drum, a lever rotatably attached to the frame, and a predetermined distance in the radial direction of the ratchet gear from the ratchet gear. And an elastic body. The ratchet gear has teeth. The lever includes a main body, a guide port, and an arm. The guide port is located in the vicinity of the strap feeding opening. An arm is located between the ratchet gear and the stopper. The arm is urged against the ratchet gear by the elastic body and is engaged with the teeth of the ratchet gear. This engagement prevents the drum from rotating in one rotational direction in which the strap is fed out. The strap is passed through the guide port. The strap feeding direction regulating mechanism is configured such that when the strap is lifted upward, the guide port is pivoted upward, and the arm is pivoted to disengage from the ratchet gear teeth. .

  The safety belt according to the present invention includes a trunk belt and a winder coupled to the trunk belt. The winder includes a body belt and a winder coupled to the body belt. The winder includes a frame, a drum rotatably attached to the frame, a strap wound around the drum, and a strap feeding direction regulating mechanism. The winder is configured such that when the strap is unwound, the drum rotates in one rotation direction, and when the drum rotates in the other rotation direction, the strap is rewound. In this winder, when receiving a force to draw the strap downward, the strap feeding direction restricting mechanism prevents the rotation of the drum in one rotation direction and prevents the strap from being drawn.

  In the safety belt winder according to the present invention, the strap is controlled to be fed downward by the strap feeding direction regulating mechanism. The operator will extend the strap upward. The hook connected to the strap is locked to the building above. Thereby, the fall distance at the time of a fall should become short.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  FIG. 1 is a conceptual diagram showing a safety belt provided with a winder according to an embodiment of the present invention. The safety belt 2 includes a body belt 4, a shock absorber 6, a winder 8, and a hook 10. The shock absorber 6 is attached to the trunk belt 4. The winder 8 is connected to the shock absorber 6 and attached to the body belt 4. The winder 8 is firmly connected to the belt via a shock absorber 6. This winder 8 may be directly connected to the belt firmly without a shock absorber.

  FIG. 2 is a conceptual front view showing the internal structure of the winder 8 of FIG. The internal structure shown in FIG. 2 is covered with a resin case (not shown). FIG. 3 is a conceptual bottom view showing the internal structure of the winder 8 of FIG. The horizontal direction in FIG. 2 is the horizontal direction. The winder 8 includes a frame 12, a main shaft 14, a drum 16, and a strap 18. The strap 18 is a lifeline. Examples of the strap 18 include a flat rope, a flat belt, and a rope. The strap 18 is not necessarily limited to a flat belt.

  The winder 8 includes a strap feeding direction regulating mechanism 19. The strap feeding direction restricting mechanism 19 includes a ratchet gear 20, a lever 22, a support shaft 24, a stopper 26, and an elastic body 28. In FIG. 2, the strap 18 is drawn out obliquely upward from the winder 8. In FIG. 1, the strap 18 is fed out from the strap feed outlet 29 of the winder 8. A hook 10 is attached to the tip of the strap 18.

  The frame 12 includes a first frame 30 and a second frame 32. The frame 12 is fixed to a resin case (not shown). The first frame 30 has a shape obtained by bending a metal plate into a substantially U shape. The first frame 30 includes a first plate 34, a second plate 36, and a connecting portion 38. The first plate 34 and the second plate 36 face each other and their planes face each other substantially in parallel. A spindle hole 40 is formed in the first plate 34 and the second plate 36. The first plate 34 and the second plate 36 are integrated with each other through a connecting portion 38. The connecting portion 38 is bent in a U shape. A metal fitting (not shown) for attaching to the shock absorber 6 is passed through the U-shaped portion. Examples of the metal fitting include a shaft and a ring.

  The second frame 32 is fixed to the first frame 30. The second frame 32 is fixed to the inner surface of the first plate 34 between the first plate 34 and the second plate 36. The second frame 32 has a flat plate shape. The second frame 32 is attached substantially parallel to the plane of the first plate 34. The second frame 32 only needs to be fixed to the first plate 34, and the fixing method is not particularly limited. In this embodiment, the first frame 30 and the second frame 32 are separated from each other, but may be constituted by an integral frame 12.

  The main shaft 14 is rotatably attached to the main shaft holes 40 of the first plate 34 and the second plate 36. A drum 16 is integrally fixed to the main shaft 14. The drum 16 is disposed between the first plate 34 and the second plate 36. The drum 16 is integral with the main shaft 14 and is rotatable with respect to the frame 12. One end of a strap 18 is fixed to the drum 16. The strap 18 is wound around the drum 16 and accommodated. The drum 16 includes flanges 39 at both axial ends. The flange 39 extends radially outward of the cylindrical shape of the drum 16. A flange 39 is an axial guide of the strap 18 wound around the drum 16.

  The ratchet gear 20 and the second frame 32 are disposed to face each other with the first plate 34 therebetween. The ratchet gear 20 has a disk shape. The main shaft 14 is passed through a shaft hole at the center of the ratchet gear 20 and fixed integrally therewith. The ratchet gear 20 has teeth 21 on its outer periphery. A plurality of teeth 21 are provided at equal intervals on the outer periphery of the ratchet gear 20. In FIG. 2, six teeth 21 are provided. The ratchet gear 20 is rotatable together with the drum 16.

  FIG. 4 is an external view of the lever 22 of the winder 8 shown in FIG. The lever 22 includes a main body 41, a guide portion 42, and an arm 44. The main body 41 has a substantially cylindrical shape, and a shaft hole 46 is formed at the center thereof. The guide portion 42 is formed in a convex shape in one direction perpendicular to the shaft hole 46 from the substantially cylindrical outer peripheral surface of the main body 41. The arm 44 is a substantially cylindrical outer peripheral surface of the main body 41 and is formed at a position facing the guide portion 42 with the shaft hole 46 therebetween. The arm 44 extends from the main body 41 in a direction substantially opposite to the guide portion 42. The arm 44 includes a portion extending in the axial direction of the shaft hole 46 and a portion extending from the portion in a direction perpendicular to the shaft hole 46.

  As shown in FIG. 2, the support shaft 24 is fixed to the second frame 32. The support shaft 24 is located in the vicinity of the strap outlet 29 of the winder 8. The support shaft 24 is disposed in parallel with the main shaft 14. The support shaft 24 is passed through the shaft hole 46 of the lever 22. Thereby, the lever 22 is rotatably supported by the second frame 32.

  The stopper 26 is fixed to the second frame 32. The stopper 26 is located in the vicinity of the tooth 21 of the ratchet gear 20. The stopper 26 is located at a predetermined distance from the ratchet gear 20 in the radial direction of the ratchet gear 20. The tip of the arm 44 of the lever 22 is located between the ratchet gear 20 and the stopper 26. By turning the lever 22 in one direction, the tip of the arm 44 is engaged with the teeth 21 of the ratchet gear 20. By turning the lever 22 in the other direction, the tip of the arm 44 comes into contact with the stopper 26.

  The elastic body 28 is located between the second frame 32 and the lever 22. The elastic body 28 is in contact with the lever 22 between the support shaft 24 and the stopper 26. The elastic body 28 biases the arm 44 in a direction away from the ratchet gear 20. The arm 44 is biased by the stopper 26 by the elastic body 28. Examples of the elastic body 28 include a coil spring, a leaf spring, and rubber.

  In FIG. 2, the strap 18 is drawn out from the winder 8. The arm 44 of the lever 22 is urged to the stopper 26 by the elastic body 28. For this reason, the rotation of the ratchet gear 20 is not blocked by the arm 44. The ratchet gear 20 and the drum 16 are rotated and the strap 18 is fed out.

  FIG. 5 is a front conceptual view showing the internal structure of the winder 8 of FIG. 1. FIG. 5 shows a state in which the strap feeding direction regulating mechanism 19 is activated. In FIG. 5, the strap 18 is drawn out downward. Due to the drawn-out strap 18, a force acts downward on the guide portion. The guide portion 42 is rotated downward about the support shaft 24. By this rotation, the arm 44 is rotated toward the ratchet gear 20 against the urging force of the elastic body 28. The tip of the arm 44 engages with the teeth 21 of the ratchet gear 20 to prevent the ratchet gear 20 from rotating. The rotation of the drum 16 integrated with the ratchet gear 20 is also prevented. Since the drum 16 is prevented from rotating, the strap 18 is not fed out. In order to operate the strap feeding direction regulating mechanism 19, it is necessary to rotate the lever 22. Since the guide portion 42 of the lever 22 can be reliably rotated downward, it is preferable to position the distal end side of the guide portion 42 above the substantially cylindrical outer peripheral surface of the lever body 41.

  The strap feeding direction regulating mechanism 19 prevents the strap 18 from being drawn downward. The operator extends the strap 18 horizontally or upward. The hook 10 is prevented from being locked to the lower structure. The winder 8 is attached to a waist belt 4 wound around the operator's waist. Thereby, engaging the hook 10 in a direction lower than the operator's waist is suppressed.

  The winder 8 includes a strap winding mechanism 47. The winding mechanism 47 has a function of constantly winding the strap 18. . As shown in FIG. 3, the strap winding mechanism 47 includes a spiral spring 48. One end of the spiral spring 48 is fixed to the second plate 36. The other end of the spring 48 is connected to the main shaft 14. The spiral spring 48 exerts a rotational biasing force on the main shaft 14 and the drum 16 to rewind the strap 18. The strap 18 is fed out from the winder 8 against the urging force of the spiral spring 48. When the strap 18 is slack, it is wound by the urging force of the spiral spring 48 by the length of the slack. With this strap winding mechanism 47, unnecessary winding of the strap 18 does not occur in the winder 8 during the work of the operator.

  In the winder 8 in which the hook 10 is locked to the structure above the operator's waist, the strap 18 is unwound when the operator leaves the hook 10 locking position. If unnecessary slack of the strap 18 occurs during the operation, the strap 18 is wound up by the continuous winding function. In the winder 8 in which the hook 10 is locked below the waist, the feeding of the strap 18 is restricted by the strap feeding direction regulating mechanism 19. When the operator leaves the hook 10 from the locking position, the strap 18 is not paid out. In the winder 8, the hook 10 is locked upward for feeding the strap 18. The winder 8 preferably includes a strap feeding direction regulating mechanism 19 and a strap winding mechanism 47.

  The winder 8 includes a strap winding lock mechanism 49. The strap take-up lock mechanism 49 has a function of always locking the take-up function. The strap winding lock mechanism 49 of the winder 8 includes a switching lever 50, a cam 52, a pin 54, a cam shaft 56, and an elastic body 58. The switching lever 50 includes a switching knob 62 at the top of the main body 60. The switching lever 50 is provided with a long hole 64 at one end of the main body 60. A tip end 66 is provided at the other end of the main body 60. The cam 52 includes a shaft hole 70 at a substantially central portion of the main body 68. A receiving portion 72 is provided at one end, and a concave portion 74 is provided on the shaft hole 70 side continuously to the receiving portion 72. A claw 76 is provided at the other end.

  The switching lever 50 has a long hole 64 slidably attached to a pin 54 fixed to a resin case (not shown). The pin 54 may be fixed to the second frame 32. The distal end portion 66 is in contact with the receiving portion 72 of the cam 52. The cam 52 is rotatably attached to a cam shaft 56 fixed to the second frame 32. The cam 52 is urged by the elastic body 58 so that the claw 76 is engaged with the teeth 21 of the ratchet gear 20. The tip end portion 66 of the switching lever 50 abuts on the receiving portion 72, and the cam 52 is prevented from rotating in a direction to engage with the teeth 21 of the ratchet gear 20.

  When the switching knob 62 of the switching lever 50 is pushed rightward, the main body 60 moves rightward. The distal end portion 66 is disengaged from the receiving portion 72 of the cam 52 and moves above the recess 74. The cam 52 is released from the rotation prevention by the tip 66. The cam 52 rotates in the direction in which the claw 76 moves to the ratchet gear 20 side by the urging of the elastic body 58. The claw 76 engages with the teeth 21 of the ratchet gear 20. Thereby, the rotation of the ratchet gear 20 in the winding direction of the strap 18 is prevented. The strap take-up lock mechanism 49 provides the strap 18 with a margin and improves the workability of the operator.

  In the winder 8, the strap feeding direction restricting mechanism 19 and the ratchet gear 20 of the strap winding lock mechanism 49 are also used. The teeth 21 of the ratchet gear 20 are provided with locking surfaces in both the feeding rotation direction and the winding rotation direction of the strap 18. In this structure, if the winder 8 includes the strap winding lock mechanism 49, the number of parts for adding the strap feeding direction regulating mechanism 19 can be reduced. The strap feeding direction regulating mechanism 19 can be easily added.

  FIG. 6 is a conceptual diagram of the strap rapid feed prevention mechanism 77 of the winder 8 of FIG. The winder 8 includes a strap rapid feeding prevention mechanism 77. The strap rapid payout prevention mechanism 77 has a function of preventing sudden strap payout when dropped. The strap rapid extension preventing mechanism 77 includes a centrifugal claw 78, a pin 80, an elastic body 82, and the second frame 32. The centrifugal claw 78 includes a claw 84, a pin hole 86, and an elastic body locking hole 88. The second frame 32 has a disk shape with a hollow center. A claw receiving tooth 90 is formed on the inner peripheral surface of the central portion of the cavity so that the claw 84 of the centrifugal claw 78 can be engaged therewith. The pin 80 is fixed to the side surface of the drum 16 on the second frame 32 side. A pin hole 86 of the centrifugal claw 78 is rotatably attached to the pin 80. One end of the elastic body 82 is locked in the elastic body locking hole 88. The other end of the elastic body 82 is fixed to the side surface of the drum 16. By this elastic body 82, the centrifugal claw 78 is biased in the direction of the main shaft 14.

  When the rapid rotation for feeding the strap 18 is applied to the drum 16, centrifugal force is applied to the centrifugal claw 78 that is rotatably attached to the drum 16. The claw 84 is rotated in a direction away from the main shaft 14 against the urging force of the elastic body 82 by the centrifugal force. The claw 84 engages with the claw receiving teeth 90 of the second frame 32. By this engagement, the rotation of the drum 16 in the strap feeding direction is prevented, and the sudden feeding of the strap 18 is prevented. Thereby, even if an operator should fall, the feeding distance of the strap 18 is shortened.

  The strap rapid extension prevention mechanism 77 restricts the extension of the strap 18 when the operator falls. The hook 10 is locked to the building above the operator by the strap feeding direction regulating mechanism 19. The combination of these two mechanisms can shorten the operator's fall distance. Further, by combining the above-described strap winding mechanism 47, the extension length of the strap 18 when the operator works can be shortened. The winder 8 provided with the strap feeding direction restricting mechanism 19, the strap rapid feeding preventing mechanism 77, and the strap winding mechanism 47 can minimize the falling distance of the operator.

  FIG. 7 is a conceptual diagram showing a winder 8 according to another embodiment of the present invention. Here, a configuration different from the one embodiment will be described. The description of the same configuration as that of the embodiment is omitted. In this embodiment, the winder 8 includes a lever 92.

  FIG. 8 is an external view of the lever 92 of the winder 8 shown in FIG. The lever 92 is formed with a guide port 94 instead of the guide portion 42. The center of the guide port 94 is an opening. The strap 18 is passed through the center of the guide port 94.

  The elastic body 28 shown in FIG. 7 urges the arm 44 toward the ratchet gear 20. In FIG. 7, the strap 18 is extended upward. When the strap 18 is extended upward, a force that rotates the guide port 94 upward is applied. The arm 44 is rotated downward. The arm 44 is pressed against the stopper 26 against the urging force of the elastic body 28. The arm 44 is disengaged from the teeth 21 of the ratchet gear 20. Thereby, the strap 18 is extended. The guide port 94 is a substantially rectangular frame, but is not limited to this shape. If the strap 18 is lifted upward, any shape may be used as long as the force that rotates the guide port 94 upwards acts.

  Although not shown, when the strap 18 is drawn downward, the guide port 94 is not subjected to a force to rotate upward. The tip of the arm 44 engages with the teeth 21 of the ratchet gear 20 by the biasing force of the elastic body 28. As a result, the ratchet gear 20 and the drum 16 are prevented from rotating in the direction in which the strap 18 is fed out. In the winder 8, the normal strap 18 is not fed out. In the winder 8, the strap 18 is prevented from being drawn out downward.

  This embodiment can be combined with the strap take-up mechanism 47, the strap rapid payout prevention mechanism 77, and the strap take-up lock mechanism 49 as in the case of the first embodiment. This combination makes it possible to minimize the worker's falling distance and to reduce the number of parts.

  The present invention can be applied to a safety belt winder that is used for electrical work, construction work, civil engineering work, and other high-altitude work. Although a main strap winder that is normally used in aerial work has been described, it can also be used in an auxiliary strap winder that is used during hook change of the main strap.

FIG. 1 is a conceptual diagram showing a safety belt provided with a winder according to an embodiment of the present invention. FIG. 2 is a front conceptual view showing the internal structure of the winder of FIG. FIG. 3 is a bottom view showing the internal structure of the winder of FIG. FIG. 4 is an external view showing a lever of the winder of FIG. FIG. 5 is a front conceptual view showing the internal structure of the winder of FIG. FIG. 6 is a conceptual diagram of the strap rapid payout prevention mechanism of the winder of FIG. FIG. 7 is a conceptual diagram showing a winder according to another embodiment of the present invention. FIG. 8 is an external view showing a lever of the winder of FIG.

Explanation of symbols

2 ... Safety belt 4 ... Body belt 6 ... Shock absorber 8 ... Winding machine 10 ... Hook 12 ... Frame 14 ... Main shaft 16 ... Drum 18 ... Strap DESCRIPTION OF SYMBOLS 19 ... Strap feeding direction control mechanism 20 ... Ratchet gear 21 ... Teeth 22 ... Lever 24 ... Support shaft 26 ... Stopper 28 ... Elastic body 29 ... Strap feeding outlet 30 ... first frame 32 ... second frame 34 ... first plate 36 ... second plate 38 ... connecting portion 39 ... 部 40 ... spindle hole 41 ... main body 42 ... guide part 44 ... arm 46 ... shaft hole 47 ... strap take-up mechanism 48 ... spiral spring 49 ... strap take-up lock mechanism 50 ... switch lever 52 ... cam 54 ... pin 5 6 ... cam shaft 58 ... elastic body 60 ... main body 62 ... switch knob 64 ... long hole 66 ... tip portion 68 ... main body 70 ... shaft hole 72 ... Receiving part 74 ... concave part 76 ... claw 77 ... strap rapid payout prevention mechanism 78 ... centrifugal claw 80 ... pin 82 ... elastic body 84 ... claw 86 ... pin hole 88 ... Elastic body locking holes 90 ... Nail receiving teeth 92 ... Lever 94 ... Guide port

Claims (4)

A frame, a drum rotatably attached to the frame, a strap wound around the drum, and a strap feeding direction regulating mechanism;
When this strap is unwound, the drum rotates in one rotation direction, and when the drum rotates in the other rotation direction, the strap is rewound.
A safety belt winder in which a strap feeding direction restricting mechanism prevents the rotation of one of the drums in a rotating direction and prevents the strap from being fed when receiving a force for feeding the strap downward. The strap feeding direction regulating mechanism is located at a predetermined distance from the ratchet gear in the radial direction of the ratchet gear, a ratchet gear that is rotatably attached to the drum, a lever that is rotatably attached to the frame, and the ratchet gear. A stopper and an elastic body,
The ratchet gear has teeth,
The lever includes a main body, a guide part, and an arm,
The guide is located near the strap outlet,
The arm is located between the ratchet gear and the stopper,
The arm is urged to the stopper by the elastic body,
When the strap is extended downward, the guide portion is rotated downward, and the arm is rotated and engaged with the teeth of the ratchet gear.
The safety belt winder according to claim 1, wherein the engagement is a mechanism that prevents the drum from rotating in one rotational direction in which the strap is fed out. The strap feeding direction regulating mechanism is located at a predetermined distance from the ratchet gear in the radial direction of the ratchet gear, a ratchet gear that is rotatably attached to the drum, a lever that is rotatably attached to the frame, and the ratchet gear. A stopper and an elastic body,
The ratchet gear has teeth,
The lever includes a main body, a guide port, and an arm.
The guide port is located in the vicinity of the strap outlet,
The arm is located between the ratchet gear and the stopper,
The arm is urged to the ratchet gear by the elastic body, is engaged with the teeth of the ratchet gear,
By this engagement, rotation of the drum in one rotational direction in which the strap is extended is prevented,
The strap is passed through the guide,
The safety belt according to claim 1, wherein when the strap is lifted upward, the guide opening is pivoted upward, and the arm is pivoted to disengage from the ratchet gear teeth. Winding machine. A torso belt and a winder connected to the torso belt;
The winder includes a frame, a drum rotatably attached to the frame, a strap wound around the drum, and a strap feeding direction regulating mechanism.
When this strap is unwound, the drum rotates in one rotation direction, and when the drum rotates in the other rotation direction, the strap is rewound.
A safety belt in which the strap feeding direction restricting mechanism prevents the rotation of one of the drums in the rotating direction and prevents the strap from being drawn out when receiving a force to draw the strap downward.

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