JP7850407B2 - Cable winding device and securing system - Google Patents

Description

This invention relates to a cable winding device that winds up and tensions a cable such as a wire or chain, and to a securing system that uses multiple such cable winding devices to secure portable equipment such as vehicles.

Conventionally, measures have been taken within the premises of nuclear power plants and similar facilities to prevent portable equipment (such as vehicles carrying equipment) from being overturned or blown away by gusts of wind from tornadoes. One such measure is the securing system (see, for example, Patent Document 1 below). The securing system involves securing the equipment to a ground-side member using ropes, chains, or other ties. However, in the event of an earthquake, the equipment may be damaged through the ties; therefore, the ties are kept loose.

Japanese Patent Publication No. 2019-52478

However, from the perspective of preventing the equipment from being blown away by tornadoes or other hazards, it is preferable to allow free slack in the ropes during normal times when tornadoes are not forecast, so as not to impose stress from the ropes. Conversely, in emergencies when tornadoes are forecast, it is preferable to apply appropriate tension to the slackened ropes to secure the equipment to the ground.

Therefore, the present invention aims to provide a cable winding device and securing system that allows for free slack in the cable under normal conditions and can apply appropriate tension to the cable in emergency situations.

The cable winding device of the present invention comprises a winding drum that is rotationally driven by a motor to wind up a cable, a ratchet gear that rotates integrally with the winding drum and has outer teeth that are inclined in a direction in which the tooth tips lead when the winding drum rotates in the opposite direction to the forward direction in which the cable is wound, and a mechanism that moves between a first position in which the pawl engages with the ratchet gear to restrict the winding drum from rotating in the reverse direction and a second position in which the pawl is separated from the ratchet gear to allow the winding drum to rotate in the reverse direction. The device comprises a freely adjustable stopper body and a disc-shaped member having inclined teeth arranged on its outer circumference in the opposite direction to the inclination of the outer teeth of the ratchet gear, and a rotating member that rotates integrally with the winding drum, and an operated part having a hanging body attached to the stopper body, the upper end of which is pivotally supported on a horizontally extending shaft and which hangs down by its own weight , wherein when the winding drum rotates in the forward direction with the stopper body in the second position, the inclined teeth arranged on the outer circumference of the rotating member are operated to push up the hanging body of the operated part, thereby positioning the stopper body in the first position.

The binding system of the present invention comprises a plurality of the above-described cable winding devices, and each of the plurality of cable winding devices winds the cable to bind the object to be bound.

According to this invention, the cable can be allowed to slacken freely under normal conditions, while an appropriate tension can be applied to the cable in emergency situations.

Perspective view of a cord winding device according to one embodiment of the present invention Plan view of a cable winding device according to one embodiment of the present invention Front view of a cable winding device according to one embodiment of the present invention (a) (b) Side view of a cord winding device in one embodiment of the present invention Perspective view of a cord winding device according to one embodiment of the present invention Perspective view of a cord winding device according to one embodiment of the present invention Partially exploded perspective view of a cord winding device according to one embodiment of the present invention (a) (b) Side view of a cord winding device in one embodiment of the present invention (a) (b) Diagram illustrating the operation of a cord winding device in one embodiment of the present invention This figure shows an example of the use of a restraining system in one embodiment of the present invention. Block diagram showing the control system of a restraint system in one embodiment of the present invention. This figure shows an example of the use of a restraining system in one embodiment of the present invention.

The embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows a cable winding device 1 according to one embodiment of the present invention. The cable winding device 1 is a device that winds up a cable WR such as a wire, rope, or chain and applies appropriate tension to the cable WR. As shown in Figure 1, it comprises a frame 11, a shaft member 12, a winding drum 13, a motor support column 14, a motor 15, a power transmission mechanism 16, a ratchet gear 17, a stopper 18, a handle 19, a rotating member 20, an operated part 21, and the like.

In Figures 2, 3, and 4(a) and 4(b), the frame 11 comprises a horizontal rectangular plate-shaped base portion 11a and a pair of shaft support portions 11b extending upward from the center of the base portion 11a. Anchor bolts BT are attached to the bolt insertion holes 11H provided at the four corners of the base portion 11a to fix the frame 11 (and therefore the cable winding device 1) to the ground. For convenience of explanation, the direction in which the two shaft support portions 11b are aligned will be referred to as the lateral direction (Y direction), the horizontal direction perpendicular to the Y direction will be referred to as the front-to-back direction (X direction), and the up-and-down direction will be referred to as the Z direction.

In Figures 2 and 3, bearings 11c are provided near the center of each of the two shaft support portions 11b. The shaft member 12 is supported by these two bearings 11c in an orientation extending in the Y direction. Therefore, the shaft member 12 is rotatable around its central axis (hereinafter referred to as the "rotation axis 12S") that extends in the Y direction.

In Figures 2, 3, and 5, the winding drum 13 has two disc-shaped flange portions 13F facing each other in the Y direction. The winding drum 13 is positioned between two shaft support portions 11b, and the shaft member 12 extends through the center of the winding drum 13 in the Y direction. The winding drum 13 and the shaft member 12 are connected in a manner that does not allow relative rotation. Therefore, the winding drum 13 rotates integrally with the shaft member 12 around the rotation axis 12S.

One end of the cable WR is connected to the winding drum 13. Therefore, when the winding drum 13 rotates in one direction (arrow R shown in Figures 4(a) and (b)), the cable WR is wound up by the winding drum 13. Conversely, when the cable WR is pulled, the winding drum 13 rotates in the opposite direction, and the cable WR is unwound from the winding drum 13. Hereinafter, the direction of rotation of the winding drum 13 when winding up the cable WR will be referred to as the "forward direction," and the opposite direction, i.e., the direction of rotation of the winding drum 13 when unwinding the cable WR, will be referred to as the "reverse direction."

In Figures 1, 2, and 4(a) and 4(b), the motor support column 14 is provided extending upward from one end of the base portion 11a in the X direction that constitutes the frame 11. Hereinafter, the direction in the X direction from which the motor support column 14 is viewed from the two shaft support portions 11b of the base portion 11a will be referred to as "rear," and the opposite direction will be referred to as "front."

In Figures 1, 4(a), (b), and 5, the motor support column 14 is provided with a motor holding portion 14H. The motor 15 is held by the motor holding portion 14H with the lower end of the drive shaft 15J, which extends in the Z direction, facing downwards.

The power transmission mechanism 16 has the function of transmitting the rotational power of the motor 15 to the winding drum 13. As shown in Figures 2 and 4(a) and (b), it is composed of a first bevel gear 16a, a second bevel gear 16b, a drive sprocket 16c, a driven sprocket 16d, and a transmission chain 16e. The first bevel gear 16a is attached to the lower end of the drive shaft 15J of the motor 15. When the drive shaft 15J of the motor 15 rotates, the first bevel gear 16a rotates around the central axis of the drive shaft 15J, which extends in the Z direction.

In Figures 2, 5, and 6, the two shaft support portions 11b rotatably support the connecting shaft 16f extending in the Y direction, and the second bevel gear 16b is provided in the middle of the connecting shaft 16f. The second bevel gear 16b is located between the two shaft support portions 11b and is rotatable around the axis in the direction in which the connecting shaft 16f extends, i.e., the Y direction.

In Figures 2, 5, and 6, one end of the connecting shaft 16f extends through one of the two shaft support portions 11b in the thickness direction (Y direction), and the drive sprocket 16c is provided at the end of the connecting shaft 16f that extends through it. That is, the drive sprocket 16c is connected to the second bevel gear 16b by the connecting shaft 16f, and rotates together with the second bevel gear 16b around the central axis of the connecting shaft 16f that extends in the Y direction.

In Figures 5, 6, and 7, the second bevel gear 16b is meshed with the first bevel gear 16a. Therefore, when the motor 15 rotates the drive shaft 15J, the rotational power of the drive shaft 15J is transmitted to the drive sprocket 16c via the first bevel gear 16a, the second bevel gear 16b, and the connecting shaft 16f.

In Figures 2 and 3, two protrusions 12T are formed at both ends of the shaft member 12, extending outward in the direction of the central axis (rotation axis 12S) of the shaft member 12. These two protrusions 12T, formed at both ends of the shaft member 12, each project outward from the shaft support portion 11b (see also Figure 7).

In Figures 2, 3, and 6, the driven sprocket 16d is fixedly mounted on one of the two protrusions 12T of the shaft member 12 (the side on which the drive sprocket 16c is located). Therefore, the driven sprocket 16d is integrated with the shaft member 12 and is rotatable around the rotation axis 12S of the shaft member 12.

In Figures 2, 6, 7, and 8(a), the transmission chain 16e is stretched between the drive sprocket 16c and the driven sprocket 16d, transmitting the rotation of the drive sprocket 16c to the driven sprocket 16d. As described above, the winding drum 13 rotates integrally with the shaft member 12, and the driven sprocket 16d also rotates integrally with the shaft member 12. Therefore, when the driven sprocket 16d rotates in response to the driving force of the motor 15, the winding drum 13 rotates through the shaft member 12. In this embodiment, the winding drum 13 is rotationally driven by the motor 15.

In Figure 7, a torque limiting means 16g is provided between the connecting shaft 16f and the drive sprocket 16c. The torque limiting means 16g consists of, for example, a torque limiter (torque guard) and prevents torque exceeding a preset limit from being transmitted from the connecting shaft 16f to the drive sprocket 16c. Specifically, when torque exceeding the limit acts on the connecting shaft, slip is created between the connecting shaft 16f and the drive sprocket 16c, thereby limiting the maximum torque transmitted from the connecting shaft 16f to the winding drum 13 so as not to exceed the limit. This prevents the motor 15 from being damaged or otherwise harmed by excessive force from the winding drum 13.

Thus, in this embodiment, the cable winding device 1 is configured such that the power transmission mechanism 16, which transmits the rotational power of the motor 15 to the winding drum 13, is equipped with a torque limiting means 16g to prevent torque exceeding a preset limiting torque from acting on the winding drum 13.

In Figures 2, 3, and 5, the ratchet gears 17 are fixedly attached to each of the two protrusions 12T of the shaft member 12. Of these two ratchet gears 17, the one attached to the same side as the driven sprocket 16d is located inside the driven sprocket 16d (towards the shaft support portion 11b). As shown in Figures 9(a) and (b), the outer teeth of each ratchet gear 17 are inclined so that the tooth tips lead when the winding drum 13 rotates in the reverse direction.

In Figures 3, 5, 6, and 7, the ratchet bodies 18 are provided corresponding to each of the two ratchet gears 17. Each ratchet body 18 is attached to a pivot shaft 11J (Figures 1 and 3) that protrudes outward in the Y direction from each of the two shaft support portions 11b, and is pivotable around the central axis of the pivot shaft 11J (pivot axis 11S; Figures 3, 4(a), (b), and 8(a), (b)). Each of the two ratchet bodies 18 extends in the X direction, and a downwardly protruding claw portion 18T is provided at its front end (Figures 4(a), (b), 8(a), (b), and 9(a), (b)).

In Figures 1, 3, 5, and 6, the handle portion 19 is provided to connect the two chock bodies 18, and consists of two rod portions 19a extending upward from each of the two chock bodies 18, and a connecting portion 19b extending in the Y direction and connecting the upper ends of the two rod portions 19a.

The two wheel chocks 18 and the handle 19, as a whole, form a wheel chock unit 18U that can pivot freely around the pivot axis 11S. When the handle 19 (i.e., the wheel chock unit 18U) is swung around the pivot axis 11S, the two wheel chocks 18 pivot around the pivot axis 11S in the same phase (Figures 9(a), (b)).

In Figures 9(a) and 9(b), the rotating member 20 is fixed to one of the two protrusions 12T formed at both ends of the shaft member 12 (the side opposite to the side where the driven sprocket 16d is provided). Therefore, the rotating member 20 rotates together with the winding drum 13 around the rotation axis 12S. As shown in Figures 2, 3, 5, and 6, the rotating member 20 is located outside the ratchet gear 17.

In Figures 9(a) and 9(b), the rotating member 20 is made up of a disc-shaped member, with inclined teeth 20T arranged along its outer circumference. The inclination direction of these inclined teeth 20T is opposite to the direction in which the outer teeth of the ratchet gear 17 are inclined. That is, the inclined teeth 20T of the rotating member 20 are inclined in the direction in which the tooth tips lead when the winding drum 13 rotates in the forward direction (arrow R shown in Figures 9(a) and 9(b)) (Figures 9(a) and 9(b)).

In Figures 1, 5, and 6, the operated portion 21 is located on the side of the two locking bodies 18 where the rotating member 20 is provided. As shown in Figures 4(b), 7, 8(b), and 9(a), (b), the operated portion 21 comprises a bracket 21B provided at the rear end of the locking body 18, a hanging shaft 21J attached to the bracket 21B and extending horizontally (Y direction), and a hanging body 21K whose upper end is pivotally supported by the hanging shaft 21J and which hangs down under its own weight. The bracket 21B extends above the rotating member 20, and the hanging body 21K hangs down above the rotating member 20.

As shown in Figures 4(a), (b) and 8(a), (b), the center of gravity GZ of the wheel chock unit 18U is located higher than the center of gravity of the wheel chock unit 18 alone. This center of gravity GZ shifts back and forth depending on the position of the handle portion 19 (specifically, the connecting portion 19b). When the handle portion 19 is positioned in front of the perpendicular line VT, the center of gravity GZ of the wheel chock unit 18U is in front of the perpendicular line VT (Figures 4(b) and 9(a)). When the handle portion 19 is positioned behind the perpendicular line VT, the center of gravity GZ of the wheel chock unit 18U is behind the perpendicular line VT (Figures 8(b) and 9(b)).

As shown in Figures 4(a), 4(b), and 9(a), when the center of gravity GZ of the chock unit 18U is located in front of the perpendicular line VT, the chock unit 18 assumes a downward-sloping position, causing its claw portion 18T to contact the outer surface of the outer teeth (inclined teeth) of the ratchet gear 17 from above. This position of the chock unit 18, where the claw portion 18T is in contact with the ratchet gear 17, will hereafter be referred to as the "first position."

On the other hand, as shown in Figures 8(a), (b) and 9(b), when the center of gravity GZ of the stud unit 18U is located behind the perpendicular line VT, the stud unit 18 assumes a downward-sloping position, separating the claw portion 18T from the outer teeth of the ratchet gear 17. Furthermore, for the stud unit 18 located on the rotating member 20 side, the bracket 21B provided on the stud unit 18 contacts the stopper portion 11P (Figures 7, 8(a), (b), and 9(a), (b)) which protrudes outward (in the Y direction) from the shaft support portion 11b from above. This position of the stud unit 18, where the claw portion 18T is separated from the ratchet gear 17, will hereafter be referred to as the "second position."

As described above, the outer teeth of the ratchet gear 17 are inclined so that the tooth tips lead when the winding drum 13 rotates in the reverse direction. Therefore, as shown in Figures 4(a), (b), and 9(a), when the winding drum 13 rotates in the forward direction with the stopper body 18 in the first position, the pawl portion 18T of the stopper body 18 does not engage with the outer teeth of the ratchet gear 17, allowing the winding drum 13 to rotate in the forward direction, and thus the cable WR is wound up by the winding drum 13. Here, by adjusting the limiting torque of the torque limiting means 16g to an appropriate value in advance, it is possible to apply appropriate tension to the cable WR.

On the other hand, if the retractor 13 attempts to rotate in the reverse direction while the stopper 18 is in the first position, the pawl 18T of the stopper 18 engages with one of the outer teeth of the ratchet gear 17, restricting the reverse rotation of the retractor 13. Therefore, even if the motor 15 is stopped while the cable WR is under appropriate tension, the cable WR will not be unwound from the retractor 13 and will remain under appropriate tension.

As described above, when slackening the cable WR from a state where it is under appropriate tension, the operator manually moves the handle 19 backward to position the stopper 18 in the second position (Figure 9(a) → Figure 9(b)). This causes the pawl 18T of the stopper 18, which was engaged with the inclined teeth of the ratchet gear 17, to separate from those teeth, allowing the ratchet gear 17 (and therefore the winding drum 13) to rotate freely. As a result, the cable WR, which was wound on the winding drum 13, is unwound while the winding drum 13 rotates in the reverse direction, becoming slack. When the stopper 18 is in the second position, the lower end of the hanging body 21K, which hangs from the bracket 21B of the stopper 18, is positioned to contact the rearmost inclined tooth 20T of the rotating member 20 from above (Figure 9(b)).

In this embodiment, the stopper body 18 is movable between a first position and a second position. When in the first position, it engages with the ratchet gear 17 to restrict the reverse rotation of the winding drum 13 when the winding drum 13 attempts to rotate in the opposite direction to the winding direction of the cable WR. When in the second position, it does not engage with the ratchet gear 17 when the winding drum 13 attempts to rotate in the reverse direction, thus allowing the winding drum 13 to rotate in the reverse direction.

As described above, the inclined teeth 20T of the rotating member 20 are inclined so that the tooth tips lead when the winding drum 13 rotates in the forward direction. Therefore, when the winding drum 13 rotates in the reverse direction while the stopper body 18 is in the second position, the inclined teeth 20T of the rotating member 20 do not engage with the hanging body 21K that hangs from the bracket 21B to the stopper body 18 (the inclined teeth 20T repel the hanging body 21K to the rear while rotating). Thus, the rotation of the ratchet gear 17 in the reverse direction is not hindered, and the winding drum 13 can rotate in the reverse direction. Furthermore, the operated part 21 does not receive force from the ratchet gear 17, and therefore maintains its position in the second position.

In contrast, when the retractable drum 13 rotates in the forward direction with the chock body 18 in the second position, the inclined teeth 20T of the rotating member 20 contact the lower end of the hanging body 21K and push it upward. This upward pushing operation of the hanging body 21K by the rotating member 20 causes the entire chock body 18 to oscillate around the pivot axis 11S and move to the first position (Figure 8(b) → Figure 4(b) and Figure 9(b) → Figure 9(a)), thereby restricting the rotation of the ratchet gear 17 (i.e., the retractable drum 13) in the reverse direction. Note that when the chock body 18 is in the first position, the center of gravity GZ of the chock body unit 18U has moved from behind the perpendicular line VT to the front (Figure 9(b) → Figure 9(a)). Therefore, after moving to the first position, the chock body 18 maintains that state (the state in the first position).

As described above, the cable winding device 1 in this embodiment includes a winding drum 13 that is rotationally driven by a motor 15 to wind up the cable WR, a ratchet gear 17 that rotates integrally with the winding drum 13, and a stopper body 18 that is movable between a first position that engages with the ratchet gear 17 to restrict the winding drum 13 from rotating in the reverse direction opposite to the winding direction of the cable WR, and a second position that does not engage with the ratchet gear 17 and allows the winding drum 13 to rotate in the reverse direction. Therefore, the cable WR can be wound up by rotating the winding drum 13 forward with the motor 15, and the ratchet mechanism consisting of the ratchet gear 17 and the stopper body 18 can maintain the tension applied to the cable WR when the motor 15 is stopped.

Therefore, in the cable winding device 1 of this embodiment, under normal circumstances, the handle portion 19 is positioned to the rear and the stopper body 18 is positioned to the second position, allowing the cable WR to be slackened and unwound freely from the winding drum 13. This prevents any load from being placed on the object being moored or secured. Furthermore, in an emergency, the motor 15 is activated to wind the cable WR onto the winding drum 13, applying appropriate tension to the cable WR, and automatically positioning the stopper body 18 to the first position. This maintains the cable WR in an appropriately taut state, allowing the object to be moored or secured.

In the cable winding device 1 of this embodiment, as described above, when the winding drum 13 is rotated in the forward direction by the motor 15, the stopper body 18 automatically moves from the second position to the first position. Therefore, in an emergency, there is no need for the operator to manually operate the handle 19. This allows for a series of slack-removing operations to be performed quickly and reliably, applying tension to the slackened cable WR and maintaining that tension.

Figure 10 shows an example of using the cable winding device 1 in the above-described embodiment as a securing system KSY. In this example, the securing system KSY targets a vehicle 31, which is a portable piece of equipment installed (parked) on a concrete ground JB laid within the premises of a nuclear power plant, etc. In emergencies such as tornadoes, where there is a risk of the vehicle 31 being blown away by a gust of wind, the system aims to prevent damage to the vehicle 31 and surrounding equipment by securing the vehicle 31 to the ground JB with multiple cable winding devices 1 (specifically, multiple cable WRs).

In the example shown in Figure 10, the vehicle 31, installed on the ground JB, has the necessary equipment 33 and multiple (six in this case) wire linking blocks 34 fixedly mounted on its cargo bed 32. Multiple cable winding devices 1 (six units, the same number as the wire linking blocks 34) constituting the securing system KSY are installed on both the left and right sides of the vehicle 31 on the ground JB. Here, the six cable winding devices 1 are arranged in equal numbers (three on each side) on the left and right sides of the vehicle 31, and each is fixed to the ground JB by anchor bolts BT.

Each end of the six wire ropes (WR) extending from the six wire winding devices 1 is connected to a wire connecting block 34 on the loading platform 32. At the installation site of the vehicle 31, a power supply 35 consisting of a battery for supplying electricity to the motors 15 of each wire winding device 1, and a control device 36 are provided. The control device 36 includes an electromagnetic relay and a control board for controlling it, and controls the operation of each of the six motors 15 on the six wire winding devices 1. The power supply 35 and the six wire winding devices 1 are connected by electrical cables 37. A switch 38 for starting the six motors 15 is connected to the control device 36 (see also Figure 11).

Under normal circumstances when tornadoes are not forecast, the handle portion 19 of each cable winding device 1 constituting the KSY securing system is positioned at the rear. As a result, the stopper body 18 of each cable winding device 1 is in the second position, and the cables WR of each cable winding device 1 are in a slack state as shown in Figure 10. In this state, the KSY securing system not only does not secure the vehicle 31 to the ground JB, but if the vehicle 31 shakes due to an earthquake or other event and the cables WR of each cable winding device 1 are pulled, the winding drum 13 of each cable winding device 1 rotates in the opposite direction to release the cables WR. Therefore, even if the vehicle 31 shakes and the cables WR are pulled, the vehicle 31 does not receive an excessive load from the cables WR, preventing damage to the vehicle 31 through the cables WR.

On the other hand, in the event of an emergency where a tornado is forecast, the operator operates switch 38 to start the motors 15 of each of the six cable winding devices 1 via the control device 36. This causes the winding drum 13 of each cable winding device 1 to rotate in the forward direction, winding the cable WR, and applying appropriate tension to the cable WR of each cable winding device 1. Furthermore, when the winding drum 13 begins to rotate in the forward direction, the rotating member 20, which rotates integrally with the winding drum 13, pushes up the operated part 21, causing the stopper body 18 of each cable winding device 1 to automatically move to the first position.

The control device 36 supplies power from the power supply 35 to the motor 15 of each cable winding device 1 for a predetermined period of time (referred to as the "operating duration"), and then stops supplying power to the motor 15. The operating duration is set to a time sufficient for the winding drum 13 to wind the cable WR and apply tension to it (for example, 15 seconds). Therefore, the cable WR of each cable winding device 1 gradually becomes taut as the motor 15 operates, and the torque transmitted from the motor 15 to the winding drum 13 increases until it reaches the limit torque set in the torque limiting means 16g.

When the torque transmitted from the motor 15 to the winding drum 13 reaches the set limit torque, the winding drum 13 stops winding the cable WR further and remains stationary, neither rotating in the forward nor reverse direction, until the motor 15 reaches its operating duration. Therefore, when the torque transmitted from the motor 15 to the winding drum 13 reaches the limit torque, the winding of the cable WR by the winding drum 13 stops.

When the motor 15 reaches its operating duration, the power supply from the power source 35 to the motor 15 is stopped. As a result, the winding drum 13 loses its ability to resist the tension of the cable WR and is pulled by the cable WR, attempting to begin rotating in the reverse direction. However, the stopper body 18 is in its first position, and the pawl portion 18T of the stopper body 18 engages with the ratchet gear 17. Therefore, the reverse rotation of the winding drum 13 is restricted, and the winding drum 13 does not rotate in the reverse direction. Consequently, the cable WR is not unwound from the winding drum 13, and the cable WR is maintained in a state of appropriate tension corresponding to the set limiting torque.

Here, the control device 36 may be configured to simultaneously start all of the motors 15 of the multiple (in this case, six) cable winding devices 1 that constitute the KSY securing system when the switch 38 is operated. However, if the capacity of the power supply 35 is insufficient, the control device 36 may be configured to control the operation of the built-in electromagnetic relay to start some (one or more) of the multiple motors 15 sequentially at time intervals staggered by a set operating duration. In this way, even if the capacity of the power supply 35 is relatively small, all of the multiple cable winding devices 1 can be made to perform the cable slack-removing operation.

In this embodiment, the cable winding device 1 includes a control device 36 that controls the operation of each of the multiple motors 15 provided in the multiple cable winding devices 1. The control device 36 is configured to start the multiple motors 15 simultaneously or sequentially by operating a single switch 38.

Once the slack in the rope WR has been removed by all six rope winding devices 1 of the KSY securing system, the vehicle 31 will be secured to the ground JB by these six rope winding devices 1 (i.e., by the KSY securing system) (Figure 12).

After the emergency situation has subsided, the operator manually operates the handle 19 of each cable winding device 1 backward. This causes the cable WR of the cable winding device 1 to be unwound from the winding drum 13, and the securing system KSY returns to its normal state (Figure 10).

In this embodiment, the KSY securing system is equipped with multiple cable winding devices 1. These multiple cable winding devices 1 wind up the cable WR, thereby securing the object to be secured (in this case, the vehicle 31) to the ground JB. Furthermore, since the multiple motors 15 provided in these multiple cable winding devices 1 are started by operating a single switch 38, each of the multiple cable winding devices 1 can be made to perform the cable WR slack removal operation with a simple operation (operating the switch 38), enabling easy and rapid equipment securing.

As described above, according to the cable winding device 1 of this embodiment, the cable WR is normally kept in a slack state, and in an emergency, the motor 15 rotates the winding drum 13 to wind the cable WR onto the winding drum 13, thereby applying appropriate tension to the cable WR. Furthermore, the ratchet mechanism, consisting of a ratchet gear 17 and a stopper 18 that rotate integrally with the winding drum 13, maintains the appropriate tension applied to the cable WR. Therefore, according to the cable winding device 1 of this embodiment, it is possible to allow free slack in the cable WR under normal circumstances and to apply appropriate tension to the cable WR in an emergency.

Furthermore, the cable winding device 1 in this embodiment includes a rotating member 20 that rotates integrally with the winding drum 13, and an operated part 21 provided on the stud body 18. When the winding drum 13 rotates in the forward direction to wind the cable WR while the stud body 18 is in the second position (the position where the tension of the cable WR is released), the rotating member 20 operates the operated part 21 to position the stud body 18 to the first position (the position where the tension of the cable WR can be maintained). Therefore, when the winding drum 13 begins to rotate in the forward direction, the stud body 18 automatically moves to the first position. For this reason, in an emergency where a tornado is forecast, there is no need for an operator to manually move the stud body 18 to the first position, allowing for quick and reliable cable slack removal.

While embodiments of the present invention have been described above, the present invention is not limited to those described above, and various modifications are possible. For example, in the above-described embodiment, the motor 15 constituted a part of the cable winding device 1, but the motor 15 does not necessarily have to be a part of the cable winding device 1.

Furthermore, in the above-described embodiment, each of the multiple rope winding devices 1 constituting the KSY securing system was supplied with power from a battery-powered power source 35. However, this configuration could be replaced with one where electricity is supplied from a commercial power source within the premises. Also, the switch 38 does not necessarily have to be located at the equipment installation site. Moreover, the switch 38 may be operated automatically in conjunction with the issuance of tornado forecasts, etc.

Furthermore, in the above-described embodiment, the rope winding devices 1 constituting the securing system KSY were arranged on the left and right sides of the vehicle 31. However, rope winding devices 1 may also be arranged at the front and rear of the vehicle 31. In this case, it is preferable that the rope winding devices 1 located not only on the left and right sides of the vehicle 31 but also at the front and rear of the vehicle 31 be started simultaneously by operating a single switch 38.

1 Cable winding device 12 Shaft member 12S Rotation axis 13 Winding drum 15 Motor 16 Power transmission mechanism 16a First bevel gear 16b Second bevel gear 16c Drive sprocket 16d Driven sprocket 16e Transmission chain 16g Torque limiting means 17 Ratchet gear 18 Catch body 18U Catch body unit 19 Handle part 20 Rotating member 21 Operated part 21K Hanging body 31 Vehicle 35 Power supply 36 Control device 38 Switch GZ Center of gravity WR Cable KSY Binding system

Claims (5)

A winding drum that is rotated by a motor to wind up the cable,
A ratchet gear having outer teeth that rotate together with the winding drum and whose tips are inclined in the direction in which they lead when the winding drum rotates in the opposite direction to the forward direction in which it winds the cord ,
A stopper body is movable between a first position in which the pawl engages with the ratchet gear to restrict the winding drum from rotating in the reverse direction when the winding drum attempts to rotate in the reverse direction, and a second position in which the pawl is separated from the ratchet gear to allow the winding drum to rotate in the reverse direction.
A rotating member which rotates integrally with the winding drum , consisting of a disc-shaped member having inclined teeth arranged on its outer circumference in the opposite direction to the inclination of the outer teeth of the ratchet gear ,
The control body is provided with an operating part which has a hanging body whose upper end is pivotally supported on a horizontally extending shaft and which hangs down by its own weight ,
A cable winding device wherein, when the winding drum rotates in the forward direction with the stopper body in the second position, the inclined teeth arranged on the outer circumference of the rotating member are operated to push up the hanging body of the operated part, thereby positioning the stopper body in the first position. The cable winding device according to claim 1, comprising a handle portion provided on the wheel stopper for moving the wheel stopper between a first position and a second position, wherein the wheel stopper is positioned at the first or second position depending on the position of the center of gravity of the wheel stopper unit including the handle portion. The cable winding device according to claim 1, further comprising torque limiting means for preventing torque exceeding a set limiting torque from being transmitted from the motor to the winding drum. A binding system comprising a plurality of cable winding devices according to any one of claims 1 to 3, wherein each of the plurality of cable winding devices winds the cable to bind an object. The securing system according to claim 4, comprising a control device that controls the operation of each of the multiple motors provided in the multiple cable winding devices, wherein the control device starts the multiple motors simultaneously or sequentially by operating a single switch.