Lashing belt fastening device

Abstract

To solve a problem in which a driving force required for a conventional lashing belt retainer drive cylinder becomes large.SOLUTION: The problem is solved by a lashing belt retainer including a lashing belt, a winding shaft, a gear provided with a first inclined surface, and a stopper, wherein an extension line of the first inclined surface passes through a rotation center of the winding shaft, and the stopper is movable along the first inclined surface between a first position at which the stopper abuts against and engages with the first inclined surface to perform stopping, and a second position at which the stopper does not abut against the first inclined surface and allows rotation of the winding shaft.SELECTED DRAWING: Figure 1A

Description

Technical Field

[0001] The present invention relates to a lashing belt fixing device used for a ship.

Background Art

[0002] In a ship, there may be a lashing belt for fixing a load at a predetermined position on the floor (deck). The lashing belt has a suspension part represented by a hook or the like at one end, and the other end is fixed to a winder. For example, as disclosed in Patent Document 1, there may be a lashing fixation in which a load is placed at a predetermined position on the floor (deck) and fixed by a lashing belt. Generally, this lashing fixation is performed by hooking the suspension part of the lashing belt on a predetermined locking member on the floor (deck), shortening the length of the lashing belt while winding the other end of the lashing belt onto the winder by a power tension mechanism, applying a predetermined tension to the lashing belt, and sandwiching and fixing the load between the lashing belt and the placement surface of the load by that tension. In a state where a predetermined tension is applied to the lashing belt, the winder is locked (in a rotation-restricted state) so that the winder does not rotate by the tension of the lashing belt.

[0003] Patent Document ② discloses an example in which a ship lashing belt fixing device (shackle) including a fixing of one end of a lashing belt used for lashing fixation and a power tension mechanism is applied. For example, such a lashing belt fixing device 9 has a form as shown in Fig. 5. The lashing belt 91 is introduced into the lashing belt fixing device 9 via a guide roller 95. The lashing belt 91 has a hook (not shown) as a suspension part at one end, and the opposite end is fixed to a winding shaft 92. The winding shaft 92 is rotated by a winding lever 94, and the lashing belt 91 is wound around the winding shaft 92.

[0004] The winding shaft 92 has a center of rotation and is rotatable around that center. The rotation of the winding shaft 92 is induced by the winding lever 94. The winding lever 94 is connected to the cylinder rod 941 of the drive cylinder, which is a drive device, and is driven by the extension and retraction of the cylinder rod 941 of the drive cylinder. In one stroke of winding the lashing belt 91, which moves the cylinder rod 941 from a retracted state (Figure 5) to an extended state (Figure 6), the winding shaft 92 is rotated by a certain angle, and the lashing belt 91 is wrapped around the winding shaft 92.

[0005] A feed gear 93, with gear teeth 931 formed on its periphery, is attached to the winding shaft 92. Typically, the winding shaft 92 and the feed gear 93 are both perfectly circular, and are positioned so that their centers are concentric. As will be described later, typically, each of the gear teeth 931 is at a gentle angle at the leading end of the winding shaft 92 in the winding direction of the lashing belt 91, and at the trailing end in the winding direction of the lashing belt 91, the winding shaft 92 has a steep angle along the radial direction of the circumference centered on its center of rotation.

[0006] A retractable feed latch mechanism 942 is attached to the winding lever 94. When winding the lashing belt 91, in one winding stroke, the feed latch mechanism 942 of the winding lever 94 engages with the gear teeth 931 of the feed gear 93 at the rear end of the gear teeth 931 when the cylinder rod 941 is retracted (Figure 5), and the winding lever 94 rotates as the cylinder rod 941 extends. The rotational force of the winding lever 94 is transmitted to the feed gear 93 via the gear teeth 931, causing the winding shaft 92 to rotate and the lashing belt 91 to be wound onto the winding shaft 92 (Figure 6).

[0007] After the cylinder rod 941 reaches its extended position, the rotation of the winding shaft 92 is locked by the stopper 97 of the lashing belt fixing device, as described later, restricting the rotation of the winding shaft 92 caused by the tension of the lashing belt 91. When the cylinder rod 941 is retracted while the rotation of the winding shaft 92 is stopped and locked, the angle of the tip side of the gear teeth 931 is shallow, so the engagement between the feed latch mechanism 942 of the winding lever 94 and the gear teeth 931 of the feed gear 93 is released, and the feed latch mechanism 942 of the winding lever 94 rotates relative to the winding shaft 92 without rotating the winding shaft 92, and the cylinder rod 941 and winding lever 94 return to their retracted state (Figure 7). This is repeated multiple times to wind the lashing belt 91 around the winding shaft 92.

[0008] When the engagement between the feed latch mechanism 942 of the winding lever 94 and the gear teeth 931 of the feed gear 93 is released, the tension applied to the lashing belt 91 generates a restoring force that causes the winding shaft 92 to rotate in the unwinding direction R, which is opposite to the winding direction W. Therefore, the stopper 97 engages with the gear teeth 931 of the feed gear 93 to maintain the position of the winding shaft 92 when the engagement between the feed latch mechanism 942 of the winding lever 94 and the gear teeth 931 of the feed gear 93 is released, and has the function of restricting and stopping the rotation of the winding shaft 92 and the feed gear 93.

[0009] The stopper 97 is a slender, plate-shaped member, typically having a stopper tip 97a and a stopper rear end 97b, which protrude and engage with the gear teeth 931 of the feed gear 93. The stopper 97 is rotatably fixed by a pivot shaft 971 between the stopper tip 97a and the stopper rear end 97b. The stopper tip 97a extends from the pivot shaft 971 so as to be close to the gear teeth 931 of the feed gear 93.

[0010] The lashing belt fixing device 9 includes a drive cylinder 96, for example, an air-driven drive cylinder, for driving the stopper 97. The drive cylinder 96 has a control shaft 961 that extends or retracts. The rear end 97b of the stopper extends below the control shaft 961. When the control shaft 961 is extended, it presses against the rear end 97b of the stopper, and when the control shaft 961 is retracted, it moves away from the rear end 97b of the stopper. When the control shaft 961 is retracted, the rear end 97b of the stopper rises accordingly, and the tip 97a of the stopper lowers and engages with the gear teeth 931 of the feed gear 93. On the other hand, when the control shaft 961 is extended, the rear end 97b of the stopper is pushed down, causing the tip 97a of the stopper to rise and disengage from the gear teeth 931 of the feed gear 93.

[0011] Each gear tooth 931 of the feed gear 93 is provided with a gear inclined surface 93a and a gear inclined surface 93b. The gear inclined surface 93a (second inclined surface) has a shape in which the distance from the center of the feed gear 93 to the gear inclined surface 93a (second inclined surface) decreases in the direction of rotation W of the winding shaft 92 in the direction in which the lashing belt 91 is wound around the center of the feed gear 93. That is, the angle between the tangent of the feed gear 93 and the gear inclined surface 93a (second inclined surface) has a shape that narrows in the direction of rotation W of the winding shaft 92 in the direction in which the lashing belt 91 is wound. The angle between the tangent of the feed gear 93 and the gear inclined surface 93a (second inclined surface) is typically 45 degrees or less.

[0012] The gear inclined surface 93b (first inclined surface) is an inclined surface that connects the gear inclined surface 93a (second inclined surface) of any feed gear 93 to the gear inclined surface 93a (second inclined surface) of the adjacent gear tooth 931. In other words, it is an inclined surface that connects the point on the gear inclined surface 93a (second inclined surface) of any feed gear 93 where the distance from the center of the feed gear 93 to the gear inclined surface 93a (second inclined surface) is greatest, and the point on the gear inclined surface 93a (second inclined surface) of the adjacent gear tooth 931 where the distance from the center of the feed gear 93 to the gear inclined surface 93a (second inclined surface) is smallest.

[0013] The angle between the tangent to the feed gear 93 and the gear inclined surface 93b (first inclined surface) is typically approximately a right angle, and is a plane perpendicular to the periphery of the feed gear 93, passing through its center.

[0014] The stopper 97 is typically positioned to extend parallel to the tangential direction of any point on the circumferential surface of the feed gear 93. When the stopper tip 97a of the stopper 97 moves down and engages with the gear teeth 931 of the feed gear 93, the stopper tip 97a and the gear inclined surface 93b (first inclined surface) come into contact with each other, and a force P in the unwinding direction R, opposite to the rotational direction W that winds up the lashing belt 91, is applied to the stopper tip 97a via the gear inclined surface 93b (first inclined surface). The stopper 97 restricts the rotation of the feed gear 93 in the longitudinal direction with a reaction force P' of the force P. [Prior art documents] [Patent Documents]

[0015] [Patent Document 1] Patent No. 3574966 [Patent Document 2] Patent No. 4193139 [Overview of the project] [Problems that the invention aims to solve]

[0016] Generally, the rotational moment applied to the winding shaft 92 by the force P and reaction force P' applied to the lashing belt 91 is approximately 100 N·m to 200 N·m. The force applied to the stopper 97 is approximately 1.5 KN to 3.5 KN, depending on the radius of the feed gear 93.

[0017] As shown in Figure 8, the stopper 97 is subjected to a force ranging from approximately 1.5 KN to approximately 3.5 KN, depending on the radius of the feed gear 93. This large force is applied to the pivot shaft 971, P' thrustThis force is applied to the stopper 97 as an axial force, causing microscopic deformation. A large reaction force to the axial force of the stopper is applied to the pivot axis 971 of the stopper 97, and consequently, a frictional force is generated between the stopper tip 97a and the gear inclined surface 93b (first inclined surface). As a result, these forces create a problem in that a particularly large force is required to rotate the stopper 97 and release the engagement between the stopper tip 97a and the gear inclined surface 93b (first inclined surface). This also creates a problem in that the rigidity required of the stopper 97 and the driving force required of the drive cylinder 96 become particularly large.

[0018] In particular, regarding the increased required driving force, if the stopper tip 97a of the stopper 97 becomes stuck in the engaged state with the gear teeth 931 of the feed gear 93, even if the drive cylinder 96 is operated, the driving force of the drive cylinder 96 is not sufficient to push down the rear end 97b of the stopper, thus preventing the lock from being released and making it impossible to release the lashing belt 91. [Means for solving the problem]

[0019] A lashing belt fixing device comprising a lashing belt, a winding shaft that fixes one end of the lashing belt and winds up the lashing belt, a plurality of gear teeth arranged around the rotation center of the winding shaft, and a stopper that engages with the gear teeth to stop the rotation of the winding shaft due to the tension of the lashing belt, wherein each of the plurality of gear teeth has a first inclined surface, the extension of the first inclined surface passes through the rotation center of the winding shaft, and the stopper is movable along the first inclined surface between a first position in contact with the first inclined surface and engaging with the first inclined surface to perform the stopping, and a second position without contacting the first inclined surface and allowing the rotation of the winding shaft. [Effects of the Invention]

[0020] In a lashing belt fastening device, the driving force required to release the lashing belt from its fixed state can be reduced.

Brief Description of the Drawings

[0021] [Figure 1A] This is a view of a conceptual diagram of a racing belt fixing device according to an embodiment of the present invention, seen from the axial direction of the take-up shaft, showing the state before one stroke of the take-up operation in the unlocked state of the take-up shaft by the stopper. [Figure 1B] This is a view of a conceptual diagram of a racing belt fixing device according to an embodiment of the present invention, seen from a direction perpendicular to the axial direction of the take-up shaft, showing the state after one stroke of the take-up operation in the unlocked state of the take-up shaft by the stopper. [Figure 2] This is a view of a conceptual diagram of a racing belt fixing device according to an embodiment of the present invention, seen from the axial direction of the take-up shaft, showing the state after one stroke of the take-up operation in the unlocked state of the take-up shaft by the stopper. [Figure 3] This is a view of a conceptual diagram of a racing belt fixing device according to an embodiment of the present invention, seen from the axial direction of the take-up shaft, showing the locked state of the take-up shaft by the stopper. [Figure 4] This is a view of a conceptual diagram of a racing belt fixing device according to an embodiment of the present invention, seen from the axial direction of the take-up shaft, showing the location of the stopper in the locked state and the unlocked state of the take-up shaft. [Figure 5] This is a view of a conceptual diagram of a conventional racing belt fixing device, seen from the axial direction of the take-up shaft, showing the state before one stroke of the take-up operation in the unlocked state of the take-up shaft by the stopper. [Figure 6] This is a view of a conceptual diagram of a conventional racing belt fixing device, seen from the axial direction of the take-up shaft, showing the state after one stroke of the take-up operation in the unlocked state of the take-up shaft by the stopper. [Figure 7]This is a conceptual diagram of a conventional lashing belt fastening device, viewed from the axial direction of the winding shaft, showing the winding shaft locked by the stopper. [Figure 8] This is a conceptual diagram of a conventional lashing belt fastening device, viewed from the axial direction of the winding shaft, showing the stopper in both the locked and unlocked states of the winding shaft. [Modes for carrying out the invention]

[0022] [Embodiment] Next, the lashing belt fixing device 1 of the present invention will be described with reference to Figures 1A to 4. Figures 1A, 2, and 3 are conceptual diagrams of a lashing belt fixing device according to an embodiment of the present invention, viewed from the axial direction of the winding shaft. Figure 1B is a conceptual diagram of a lashing belt fixing device according to an embodiment of the present invention, viewed from a direction perpendicular to the axial direction of the winding shaft. Figure 4 is an enlarged view of the stopper portion of the lashing belt fixing device according to an embodiment of the present invention. Figures 1A and 1B show the state before one winding stroke operation with the winding shaft unlocked by the stopper. Figure 2 shows the state after one winding stroke operation with the winding shaft unlocked by the stopper. Figure 3 shows the state of the winding shaft locked by the stopper.

[0023] As shown in Figure 1A, the lashing belt fixing device 1 of this embodiment comprises a lashing belt 11, a winding shaft 12, a plurality of gear teeth 131, and a stopper 18. The lashing belt 11 is introduced into the lashing belt fixing device 1 via a guide roller 15. The lashing belt 11 has a hook (not shown) which serves as a suspension part at one end, and the other end is fixed to the winding shaft 12. A winding lever 14 is attached to the winding shaft 12 so as to have a center of rotation concentric with the center of rotation of the winding shaft 12 and being rotatable relative to the winding shaft 12. The winding shaft 12 rotates with the rotation of the winding lever 14. The winding shaft 12 rotates with the winding lever 14, and the lashing belt 11 is wound onto the winding shaft 12. The plurality of gear teeth 131 are arranged around the center of rotation of the winding shaft 12. Specifically, the multiple gear teeth 131 are arranged on the periphery of a disc attached to the winding shaft 12 concentrically with the rotation center of the winding shaft 12, and constitute a feed gear 13 having multiple gear teeth 131.

[0024] A feed gear 13, with gear teeth 131 formed on its periphery, is attached to the winding shaft 12. Typically, the winding shaft 12 and the feed gear 13 are both circular, and are positioned so that their centers are concentric. In this specification, the winding direction of the lashing belt 11 on the winding shaft 12 (clockwise direction in Figure 1A) is defined as the tip side of the gear teeth 131, and the direction opposite to the winding direction of the lashing belt 11 on the winding shaft 12 (counterclockwise direction in Figure 1A) is defined as the rear end side of the gear teeth 131. As will be described later, typically, each of the gear teeth 131 has a gentle slope at the tip side and a steep angle along the radial direction of the rotation center of the winding shaft 12 at the rear end side. Here, the gentle angle at the tip side is a shallow angle (at least less than 45 degrees) with respect to the tangent to the periphery of the winding shaft 12. Furthermore, a typical example of a steep angle at the rear end is that it is perpendicular to the tangent to the periphery of the winding shaft 12. Details are as follows.

[0025] Each gear tooth 131 of the feed gear 13 is provided with a gear inclined surface 13a and a gear inclined surface 13b. The gear inclined surface 13a (second inclined surface) has a shape in which the distance from the center of rotation of the feed gear 13 to the gear inclined surface 13a (second inclined surface) decreases in the direction of rotation W of the winding shaft 12 in the direction in which the lashing belt 11 is wound around the center of rotation of the feed gear 13 (clockwise direction in Figure 1A). That is, the angle between the tangent of the feed gear 13 and the gear inclined surface 13a (second inclined surface) has a shape that narrows in the direction of rotation W of the winding shaft 12 in the direction in which the lashing belt 11 is wound. Typically, the angle between the tangent of the feed gear 13 and the gear inclined surface 13a (second inclined surface) is 45 degrees or less. In other words, each of the multiple gear teeth 131 has a gear inclined surface 13a (second inclined surface) in which the distance from the center of rotation of the winding shaft 12 gradually decreases in the winding direction of the lashing belt 11 of the winding shaft 12, starting from the position of the gear inclined surface 13b (first inclined surface) which is furthest from the center of rotation of the winding shaft 12.

[0026] The gear inclined surface 13b (first inclined surface) is an inclined surface that connects the gear inclined surface 13a (second inclined surface) of any feed gear 13 to the gear inclined surface 13a (second inclined surface) of the adjacent gear tooth 131. The extension of the gear inclined surface 13b (first inclined surface) passes through the rotation center of the winding shaft 12. That is, for adjacent gear teeth 131, it is an inclined surface that connects the point on the gear inclined surface 13a (second inclined surface) of any feed gear 13 where the distance from the center of the feed gear 13 to the gear inclined surface 13a (second inclined surface) is greatest to the point on the gear inclined surface 13a (second inclined surface) of the adjacent gear tooth 131 where the distance from the center of the feed gear 13 to the gear inclined surface 13a (second inclined surface) is smallest. The angle between the tangent to the feed gear 13 and the gear inclined surface 13b (first inclined surface) is typically approximately a right angle, and is a plane perpendicular to the periphery of the feed gear 13, passing through the center of the feed gear 13.

[0027] A feed latch mechanism 142 is attached to the winding lever 14, which extends and retracts along the radial direction of the winding shaft 12. The tip 142a of the feed latch mechanism 142 abuts against the gear teeth 131 of the feed gear 13. The feed latch mechanism 142 abuts against the gear inclined surface 13a (second inclined surface) and is movable on the gear inclined surface 13a (second inclined surface). The feed latch mechanism 142 abuts against the gear inclined surface 13b (first inclined surface) and is engaged with the gear inclined surface 13b (first inclined surface). When the winding lever 14 is rotated in the winding direction of the lashing belt 11, the tip 142a of the feed latch mechanism 142 engages with the gear inclined surface 13b (first inclined surface) at the rear end of the gear teeth 131, fixing the winding lever 14 and the winding shaft 12, and transmitting the rotational force of the winding lever 14 to the winding shaft 12. In other words, the winding lever 14 can rotate together with the winding shaft 12 in the winding direction of the lashing belt 11 when the feed latch mechanism 142 engages with the gear inclined surface 13b (first inclined surface). On the other hand, when the winding lever 14 is rotated in the opposite direction to the winding direction of the lashing belt 11, the tip 142a of the feed latch mechanism 142 moves from the tip of the gear tooth 131 along the gear inclined surface 13a (second inclined surface) of the gear tooth 131, and the winding lever 14 is not fixed to the winding shaft 12, and the winding lever 14 can rotate in the opposite direction to the winding direction of the lashing belt 11 without rotating the winding shaft 12. This is the state in which the engagement between the feed latch mechanism 142 of the winding lever 14 and the gear tooth 131 of the feed gear 13 is released. When the engagement between the feed latch mechanism 142 and the gear inclined surface 13b (first inclined surface) is released, the winding lever 14 can rotate without rotating the winding shaft 12 while the feed latch mechanism 142 moves on the gear inclined surface 13a (second inclined surface).

[0028] The winding of the lashing belt 11 is performed by repeating the lashing belt winding operation multiple times, with each stroke (from the state in Figure 1A to the state in Figure 2) being the amount of rotation of the winding shaft 12 due to the rotation of the winding lever 14, which corresponds to the movement of the cylinder rod 141 from the retracted state to the extended state. That is, in one stroke of winding the lashing belt 11, first, when the cylinder rod 141 is in the retracted state, the feed latch mechanism 142 of the winding lever 14 engages with the rear end of the gear teeth 131 of the feed gear 13 (Figure 1A), and as the cylinder rod 141 extends, the winding lever 14 rotates. The rotational force of the winding lever 14 is transmitted to the feed gear 13 via the gear teeth 131, causing the winding shaft 12 to rotate and the lashing belt 11 to be wound onto the winding shaft 12 (Figure 2). This is repeated multiple times until the required amount of lashing belt is wound.

[0029] When winding up the lashing belt 11, in one stroke of winding up the lashing belt 11, the feed latch mechanism 142 of the winding lever 14 engages with the gear teeth 131 of the feed gear 13 at the rear end of the gear teeth 131 when the cylinder rod 141 is retracted (Figure 1A), and the winding lever 14 rotates as the cylinder rod 141 extends. As the cylinder rod 141 extends, the winding lever 14 rotates, and the rotational force of the winding lever 14 is transmitted to the feed gear 13 via the gear teeth 131, causing the winding shaft 12 to rotate and the lashing belt 11 to be wound onto the winding shaft 12 (Figure 6).

[0030] When the engagement between the feed latch mechanism 142 of the winding lever 14 and the gear teeth 131 of the feed gear 13 is released, the tension applied to the lashing belt 11 generates a restoring force on the winding shaft 12 that causes it to rotate in the unwinding direction R, opposite to the winding direction W of the lashing belt 11. Therefore, when the engagement between the feed latch mechanism 142 of the winding lever 14 and the gear teeth 131 of the feed gear 13 is released, the stopper 18 engages with the gear teeth 131 of the feed gear 13 to preserve the position of the winding shaft 12, thereby restricting the rotation of the winding shaft 12 and stopping its rotation.

[0031] The stopper 18 is a long, slender plate-shaped member, typically having a stopper tip 18a and a stopper rear end 18b, which protrude and engage with the gear teeth 131 of the feed gear 13. The contact surface between the stopper 18 and the gear inclined surface 13b (first inclined surface) has an extension of the contact surface that passes through the rotation center of the winding shaft 12.

[0032] The gear inclined surface 13b (first inclined surface) is configured such that the extension of the gear inclined surface 13b (first inclined surface) passes through the rotation center of the winding shaft 12. The stopper 18 is held so as to be movable along the first inclined surface. That is, the stopper 18 is movable in a direction passing through the rotation center of the winding shaft 12. The stopper 18 does not have a pivot axis and is movable along the gear inclined surface 13b (first inclined surface) between a first position in which it contacts and engages with the gear inclined surface 13b (first inclined surface) to stop, and a second position in which it does not contact the gear inclined surface 13b (first inclined surface) and allows the winding shaft 12 to rotate. The stopper 18 is movable along the gear inclined surface 13b (first inclined surface) between a first position in which it contacts and engages with the gear inclined surface 13b (first inclined surface) to stop the feed gear 13 and the winding shaft 12, and a second position in which it does not contact the gear inclined surface 13b (first inclined surface) and allows the winding shaft 12 to rotate.

[0033] The stopper 18 is movable along the extension of the gear inclined surface 13b (first inclined surface) that passes through the rotation center of the winding shaft 12, such that the extension of the contact surface between the stopper 18 and the gear inclined surface 13b (first inclined surface) passes through the rotation center of the winding shaft 12. Therefore, the movement of the stopper 18 between the first and second positions is typically an up-and-down movement in the vertical direction (longitudinal direction of the stopper 18) that passes through the rotation center of the winding shaft 12.

[0034] Movement of the stopper 18 between the first and second positions can be achieved by various methods, but for example, the stopper 18 can be configured such that it is biased toward the gear teeth 131 of the feed gear 13. For example, a spring (not shown) biases the stopper 18 toward the gear inclined surface 13a (second inclined surface) or the gear inclined surface 13b (first inclined surface) of the gear teeth 131, and this position becomes the first position. The stopper lever 17 has a lever tip 17a that engages with the stopper 18. The stopper 18 can be configured to trigger movement from the first position to the second position. The stopper lever 17 can typically be an elongated plate-shaped member having a lever tip 17a and a lever rear end 17b.

[0035] The stopper lever 17 is rotatably fixed by a pivot shaft 171 between the lever tip 17a (one end) and the lever rear end 17b (the other end). The lashing belt fixing device 1 includes a drive cylinder 16, which is a drive device. The drive cylinder 16 can be, for example, an air-driven air cylinder. The drive cylinder 16 has an extendable control shaft 161. When the control shaft 161 is extended, the lever rear end 17b is pushed down, the lever tip 17a rotates around the pivot shaft 171 and rises, and the stopper 18 moves to rise to the second position. Conversely, when the control shaft 161 is retracted, the lever rear end 17b rises accordingly, the lever tip 17a descends, and the stopper 18 moves to descend to the first position due to the biasing force. The biasing of the stopper 18 toward the multiple gear teeth 131 can be done by, for example, attaching a spring to the stopper 18 to bias the stopper 18 itself, or by applying a biasing force to the stopper lever 17 such that the lever tip 17a (one end) is lowered, thereby biasing the stopper 18 toward the multiple gear teeth 131.

[0036] The stopper 18 is in a first position where its stopper tip 18a is inserted between adjacent gear teeth 131, and the stopper tip 18a is fully inserted between adjacent gear teeth 131. In this position, the side surface of the stopper tip 18a of the stopper 18 contacts and engages with the gear inclined surface 13b (first inclined surface).

[0037] In other words, in the lashing belt fixing device 1, when the stopper 18 is in contact with the gear inclined surface 13b (first inclined surface) and engaged with the gear inclined surface 13b (first inclined surface), the winding shaft 12 does not rotate even due to the tension of the lashing belt 11 (lashing belt 11 is fixed). On the other hand, when the engagement between the stopper 18 and the gear inclined surface 13b (first inclined surface) is released, the winding shaft 12 becomes rotatable (lashing belt 11 is movable).

[0038] Furthermore, in the lashing belt fixing device 1, when the feed latch mechanism 142 of the winding lever 14 is in contact with the gear inclined surface 13b (first inclined surface) and the feed latch mechanism 142 is engaged with the gear inclined surface 13b (first inclined surface), the winding lever 14 is rotatable together with the winding shaft 12, and the winding shaft 12 can be rotated by the rotation of the winding lever 14. In this state, the lashing belt 11 can be wound around the winding shaft 12 by rotating the winding lever 14 in the winding direction of the lashing belt 11. On the other hand, when the engagement between the feed latch mechanism 142 of the winding lever 14 and the gear inclined surface 13b (first inclined surface) is released, the winding lever 14 becomes rotatable without rotating the winding shaft 12.

[0039] Therefore, in the winding operation of the lashing belt fixing device 1 in one stroke, the feed latch mechanism 142 of the winding lever 14 contacts the gear inclined surface 13b (first inclined surface), and while the feed latch mechanism 142 is engaged with the gear inclined surface 13b (first inclined surface), when the engagement between the stopper 18 and the gear inclined surface 13b (first inclined surface) is released, the winding shaft 12 becomes rotatable, and the winding lever 14 is rotated by a predetermined amount in the winding direction of the lashing belt 11 to wind the lashing belt 11 around the winding shaft 12. Then, by engaging the stopper 18 with the gear inclined surface 13b (first inclined surface) to restrict the rotation of the winding shaft 12, and rotating the winding lever 14 back by a predetermined amount in the opposite direction to the winding direction of the lashing belt 11, it is possible to return to the initial state of the one-stroke winding operation.

[0040] In this state, the side surface of the stopper tip 18a and the gear inclined surface 13b (first inclined surface) are in contact with each other. A force P in the unwinding direction R, opposite to the rotational direction W that winds up the lashing belt 11, is applied to the side surface of the stopper tip 18a via the gear inclined surface 13b (first inclined surface). Force P is a force generated on the gear inclined surface 13b (first inclined surface) corresponding to the rotational moment around the rotation center of the winding shaft 12, which corresponds to the tension of the lashing belt 11. Force P is applied to the side surface of the stopper 18, and the side surface of the stopper 18 limits the rotation of the feed gear 13 with a reaction force P' that opposes force P.

[0041] Since the stopper 18 itself does not have a pivot axis, and the side surface of the stopper 18 can simply move in the direction passing through the rotation center of the winding shaft 12, even if a force P is applied to the side surface of the stopper 18 from the gear inclined surface 13b (first inclined surface), the stopper 18 can move between the first and second positions with little force, excluding the frictional force. [Explanation of Symbols]

[0042] 1.9 Lashing belt fixing device 11.91 Lashing belt 12.92 Winding shaft 13.93 Feed gear 131,931 gear teeth 13a, 93a Gear inclined surface (second inclined surface) 13b, 93b Gear Inclined Surface (First Inclined Surface) 14, 94 Retractable lever 142,942 Latch mechanism 141,941 Cylinder rod 15.95 Guide roller 16,96 Drive mechanism (drive cylinder) 161,961 control shafts 17 Stopper Lever 18.97 Stopper 171,971 pivot shafts

Claims

1. Lashing belts and A winding shaft that secures one end of the lashing belt and winds up the lashing belt, Multiple gear teeth arranged around the rotation center of the winding shaft, A stopper that engages with the gear teeth to stop the rotation of the winding shaft due to the tension of the lashing belt, A stopper lever having one end and the other, which rotates around a pivot axis, A lashing belt fastening device comprising: Each of the aforementioned gear teeth is provided with a first inclined surface, The extension of the first inclined surface passes through the rotation center of the winding shaft. A lashing belt fixing device characterized in that it is movable along a first inclined surface between a first position in which, when the other end of the stopper lever rises, the one end of the stopper lever descends and the stopper contacts and engages with the first inclined surface to stop the belt, and a second position in which, when the other end of the stopper lever descends, the one end of the stopper lever rises and the stopper does not contact the first inclined surface, thereby allowing the winding shaft to rotate.

2. A lashing belt fixing device according to claim 1, The winding shaft is equipped with a disc attached to the winding shaft concentrically with the center of rotation of the winding shaft, A lashing belt fixing device in which each of the plurality of gear teeth is formed on the periphery of the disc.

3. A lashing belt fastening device according to claim 2, A lashing belt fixing device in which each of the plurality of gear teeth has a second inclined surface that is shaped such that the distance from the center of rotation of the winding shaft gradually decreases in the winding direction of the winding shaft, starting from the position of the first inclined surface that is furthest from the center of rotation of the winding shaft.

4. A lashing belt fixing device according to claim 3, The winding shaft is provided with a winding lever that rotates relative to the winding shaft and is concentric with the rotation center of the winding shaft. The winding lever is equipped with a latch mechanism that contacts and engages with the first inclined surface, A lashing belt fixing device in which the winding lever is rotatable in the winding direction of the lashing belt on the winding shaft when the latch mechanism engages with the first inclined surface, and the winding lever is rotatable without rotating the winding shaft when the engagement of the latch mechanism with the first inclined surface is released.

5. A lashing belt fixing device according to claim 4, When the engagement of the winding lever with the first inclined surface of the latch mechanism is released, The stopper is a lashing belt fixing device that contacts and engages with the first inclined surface.

6. A lashing belt fastening device according to any one of claims 1 to 5, The stopper is a lashing belt fixing device that is biased toward the multiple gear teeth.

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