Lashing belt retainer

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 for use on a ship. [Background technology]

[0002] Ships sometimes use lashing belts to secure cargo to a predetermined location on the floor (deck). The lashing belt has a suspension portion, typically a hook, at one end and the other end secured to a reel. For example, as disclosed in Patent Document 1, a cargo is placed at a predetermined location on the floor (deck) and secured with a lashing belt. This lashing is generally defined as hooking the suspension portion of the lashing belt onto a predetermined fastening member on the floor (deck), shortening the length of the lashing belt while winding the other end of the lashing belt onto a reel using a power tensioning mechanism, applying a predetermined tension to the lashing belt, and clamping and securing the cargo between the lashing belt and the surface on which the cargo is placed. When the predetermined tension is applied to the lashing belt, the reel is locked (in a rotation-restricted state) to prevent rotation due to the tension of the lashing belt.

[0003] Patent Document 2 discloses an example of the application of a lashing belt fixing device (sherlock) for ships, which is equipped with a mechanism for fixing one end of a lashing belt used for lashing and a power tensioning mechanism. For example, such a lashing belt fixing device 9 has a configuration as shown in FIG. 5. A 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) serving 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 onto the winding shaft 92.

[0004] The winding shaft 92 has a center of rotation and is rotatable around that center of rotation. Rotation of the winding shaft 92 is induced by a winding lever 94. The winding lever 94 is connected to a cylinder rod 941 of a drive cylinder, which serves as a drive device, and is driven by the extension and contraction of the cylinder rod 941 of the drive cylinder. With one stroke of winding the lashing belt 91, which moves the cylinder rod 941 from its contracted state (FIG. 5) to its extended state (FIG. 6), the winding shaft 92 rotates by a certain angle, and the lashing belt 91 is wound around the winding shaft 92.

[0005] A feed gear 93 having gear teeth 931 formed on its periphery is attached to the take-up shaft 92. The take-up shaft 92 and the feed gear 93 are typically each a perfect circle and are arranged so that their centers are concentric. As will be described later, typically, the gear teeth 931 are at a gentle angle at the leading end of the take-up shaft 92 in the take-up direction of the lashing belt 91, and at the trailing end of the take-up shaft 92 in the take-up direction of the lashing belt 91, the take-up shaft 92 has a steep angle along the radial direction of the circumference centered on its center of rotation.

[0006] An expandable feed latch mechanism 942 is attached to the winding lever 94. When the lashing belt 91 is wound up, during 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 in a contracted state (FIG. 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 up onto the winding shaft 92 (FIG. 6).

[0007] After the cylinder rod 941 reaches the extended position, as will be described later, the stopper 97 of the lashing belt fixing device locks the rotation of the take-up shaft 92, restricting the rotation of the take-up shaft 92 caused by the tension of the lashing belt 91. When the cylinder rod 941 is retracted while the rotation of the take-up shaft 92 is stopped and locked, the angle of the tip side of the gear teeth 931 is gentle, so the feed latch mechanism 942 of the take-up lever 94 is disengaged from the gear teeth 931 of the feed gear 93. This causes the feed latch mechanism 942 of the take-up lever 94 to rotate relative to the take-up shaft 92 without rotating the take-up shaft 92, and the cylinder rod 941 and take-up lever 94 return to their retracted states ( FIG. 7 ). This is repeated multiple times to wind the lashing belt 91 around the take-up shaft 92.

[0008] When the feed latch mechanism 942 of the winding lever 94 is disengaged from the gear teeth 931 of the feed gear 93, a restoring force is generated in the winding shaft 92, which tends to rotate in the winding release direction R, which is opposite to the rotation direction W for winding the lashing belt 91, due to the tension applied to the lashing belt 91. Therefore, when the feed latch mechanism 942 of the winding lever 94 is disengaged from the gear teeth 931 of the feed gear 93, the stopper 97 engages with the gear teeth 931 of the feed gear 93 to hold the position of the winding shaft 92, 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 typically an elongated plate-shaped member having a stopper leading end 97a and a stopper rear end 97b so as to protrude and engage with the gear teeth 931 of the feed gear 93. The stopper 97 has a rotation shaft 971 between the stopper leading end 97a and the stopper rear end 97b, and is rotatably fixed by the rotation shaft 971. The stopper leading end 97a extends from the rotation 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, air-driven, for driving the stopper 97. The drive cylinder 96 has a control shaft 961 that extends or retracts. The stopper rear end 97b extends below the control shaft 961. When the control shaft 961 extends, it applies pressure to press the stopper rear end 97b, and when the control shaft 961 is retracted (retracted), it moves away from the stopper rear end 97b. When the control shaft 961 is retracted (retracted), the stopper rear end 97b rises accordingly, and the stopper tip 97a moves down and engages with the gear teeth 931 of the feed gear 93. On the other hand, when the control shaft 961 extends, the stopper rear end 97b is pushed down, and the stopper tip 97a also rises, releasing it from engagement with the gear teeth 931 of the feed gear 93.

[0011] Each of the gear teeth 931 of the feed gear 93 includes a gear inclined surface 93a and a gear inclined surface 93b. The gear inclined surface 93a (second inclined surface) is shaped so that the distance from the center of the feed gear 93 to the gear inclined surface 93a (second inclined surface) decreases toward the rotation direction W of the take-up shaft 92, which is the direction in which the lashing belt 91 is taken up around the center of the feed gear 93. In other words, the angle formed between the tangent to the feed gear 93 and the gear inclined surface 93a (second inclined surface) narrows toward the rotation direction W of the take-up shaft 92, which is the direction in which the lashing belt 91 is taken up. The angle formed between the tangent to 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 the adjacent gear teeth 931. That is, in the adjacent gear teeth 931, the gear inclined surface 93b 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 the longest to 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 the shortest.

[0013] The angle formed by 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 surface perpendicular to the periphery of the feed gear 93 that passes through the center of the feed gear 93.

[0014] The stopper 97 is typically disposed so as to extend parallel to the tangent direction of any point on the circumferential surface of the feed gear 93. When a stopper tip 97a of the stopper 97 descends and engages with 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 an unwinding direction R opposite to the rotation direction W for winding up the lashing belt 91 is applied to the stopper tip 97a via the gear inclined surface 93b (first inclined surface). The stopper 97 limits 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 Summary of the Invention [Problem to be solved by the invention]

[0016] Generally, the rotational moment applied to the take-up shaft 92 due to the force P applied to the lashing belt 91 and the reaction force P' 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 FIG. 8, a force of about 1.5 kN to about 3.5 kN is applied to the stopper 97 depending on the radius of the feed gear 93. This large force is applied to the rotary shaft 971 as a force P'. thrustIn this manner, an axial force is applied to the stopper 97, causing micro-deformation. A large reaction force against the axial force of the stopper is applied to the rotation shaft 971 of the stopper 97, and this in turn generates a frictional force between the stopper tip 97a and the gear inclined surface 93b (first inclined surface). Therefore, due to these forces, 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 poses 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, in terms of the increased driving force required, when the stopper tip 97a of the stopper 97 becomes stuck while engaged with the gear teeth 931 of the feed gear 93, even if the drive cylinder 96 is operated, the rated driving force of the drive cylinder 96 is not enough to push down the stopper rear end 97b, so the lock cannot be released and the lashing belt 91 cannot be released. [Means for solving the problem]

[0019] This problem is solved by a lashing belt fixing device comprising a lashing belt, a take-up shaft that fixes one end of the lashing belt and takes up the lashing belt, a plurality of gear teeth arranged around the center of rotation of the take-up shaft, and a stopper that engages with the gear teeth to stop the rotation of the take-up shaft due to the tension of the lashing belt, wherein each of the plurality of gear teeth has a first inclined surface, an extension of the first inclined surface passes through the center of rotation of the take-up shaft, and the stopper is movable along the first inclined surface between a first position where the stopper abuts against the first inclined surface and engages with the first inclined surface to stop the rotation, and a second position where the stopper does not abut against the first inclined surface and allows the take-up shaft to rotate. [Effects of the Invention]

[0020] In the lashing belt fixing device, the driving force required to release the fixed state of the lashing belt can be reduced. [Brief explanation of the drawings]

[0021] [Figure 1A] This is a conceptual diagram of a lashing belt fixing device that is an embodiment of the present invention, viewed from the axial direction of the winding shaft, showing the state before one stroke of winding operation when the winding shaft is unlocked by the stopper. [Figure 1B] This is a conceptual diagram of a lashing belt fixing device that is an embodiment of the present invention, viewed from a direction perpendicular to the axial direction of the winding shaft, and shows the state after one stroke of winding operation when the winding shaft is unlocked by the stopper. [Figure 2] This is a conceptual diagram of a lashing belt fixing device that is an embodiment of the present invention, viewed from the axial direction of the winding shaft, showing the state after one stroke of winding operation with the winding shaft unlocked by the stopper. [Figure 3] 1 is a conceptual diagram of a lashing belt fixing device according to an embodiment of the present invention, viewed from the axial direction of the winding shaft, showing the state in which the winding shaft is locked by a stopper. [Figure 4] 1 is a conceptual diagram of a lashing belt fixing device according to an embodiment of the present invention, viewed from the axial direction of the winding shaft, showing the locations of the stoppers when the winding shaft is locked and when it is released. [Figure 5] FIG. 1 is a conceptual diagram of a conventional lashing belt fastening device, viewed from the axial direction of the winding shaft, showing the state before one stroke of winding operation with the winding shaft unlocked by the stopper. [Figure 6] FIG. 1 is a conceptual diagram of a conventional lashing belt fastening device, viewed from the axial direction of the winding shaft, showing the state after one stroke of winding operation with the winding shaft unlocked by the stopper. [Figure 7]1 is a conceptual diagram of a conventional lashing belt fixing device, viewed from the axial direction of the winding shaft, showing the state in which the winding shaft is locked by a stopper. [Figure 8] 1 is a conceptual diagram of a conventional lashing belt fixing device, viewed from the axial direction of the winding shaft, showing the location of the stopper when the winding shaft is locked and when it is released. DETAILED DESCRIPTION OF THE INVENTION

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

[0023] As shown in FIG. 1A, the lashing belt fixing device 1 of this embodiment includes a lashing belt 11, a take-up shaft 12, multiple 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) serving as a suspension portion at one end, and the opposite end is fixed to the take-up shaft 12. A take-up lever 14 is attached to the take-up shaft 12 and is rotatable relative to the take-up shaft 12 so that its center of rotation is concentric with the center of rotation of the take-up shaft 12. The take-up shaft 12 rotates due to the rotation of the take-up lever 14. The take-up shaft 12 rotates due to the take-up lever 14, and the lashing belt 11 is wound onto the take-up shaft 12. The multiple gear teeth 131 are arranged around the center of rotation of the take-up shaft 12. Specifically, the plurality of gear teeth 131 are arranged on the periphery of a disk attached to the winding shaft 12 concentrically with the center of rotation of the winding shaft 12 , and are configured as a feed gear 13 having a plurality of gear teeth 131 .

[0024] A feed gear 13 having gear teeth 131 formed on its periphery is attached to the take-up shaft 12. The take-up shaft 12 and the feed gear 13 are typically each a perfect circle and are arranged so that their centers are concentric. In this specification, the winding direction of the lashing belt 11 on the take-up shaft 12 (clockwise direction in FIG. 1A) is defined as the leading end side of the gear teeth 131, and the opposite direction to the winding direction of the lashing belt 11 on the take-up shaft 12 (counterclockwise direction in FIG. 1A) is defined as the trailing end side of the gear teeth 131. As will be described later, typically, each of the gear teeth 131 has a slope with a gentle angle on the leading end side and a steep angle on the trailing end side along the radial direction of the rotation center of the take-up shaft 12. Here, the gentle angle on the leading end side is a shallow angle (at least less than 45 degrees) with respect to a tangent to the periphery of the take-up shaft 12. A typical example of a steep angle on the rear end side is perpendicular to the tangent to the periphery of the winding shaft 12. The details are as follows.

[0025] Each of the gear teeth 131 of the feed gear 13 includes a gear inclined surface 13a and a gear inclined surface 13b. The gear inclined surface 13a (second inclined surface) is shaped so that the distance from the rotation center of the feed gear 13 to the gear inclined surface 13a (second inclined surface) decreases toward the rotation direction W of the take-up shaft 12, which is the direction in which the lashing belt 11 is taken up around the rotation center of the feed gear 13 (clockwise in FIG. 1A). In other words, the angle formed by the tangent to the feed gear 13 and the gear inclined surface 13a (second inclined surface) narrows toward the rotation direction W of the take-up shaft 12, which is the direction in which the lashing belt 11 is taken up. The angle formed by the tangent to the feed gear 13 and the gear inclined surface 13a (second inclined surface) is typically 45 degrees or less. That is, each of the multiple gear teeth 131 has a gear inclined surface 13a (second inclined surface) shaped such that the distance from the center of rotation of the winding shaft 12 gradually decreases in the winding direction of the lashing belt 11 on the winding shaft 12 from the position of the gear inclined surface 13b (first inclined surface) which is farthest 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 in the adjacent gear teeth 131. An extension line of the gear inclined surface 13b (first inclined surface) passes through the center of rotation of the take-up shaft 12. In other words, the gear inclined surface 13b (first inclined surface) is an inclined surface that connects, in the adjacent gear teeth 131, a 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 the longest, with a 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 the shortest. The angle formed by the tangent to the feed gear 13 and the gear inclined surface 13b (first inclined surface) is typically a nearly right angle, and is a plane perpendicular to the periphery of the feed gear 13 that passes through the center of the feed gear 13.

[0027] A feed latch mechanism 142 that expands and contracts along the radial direction of the winding shaft 12 is attached to the winding lever 14. A 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 engageable 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 together and transmitting the rotational force of the winding lever 14 to the winding shaft 12. That is, when the feed latch mechanism 142 engages with the gear inclined surface 13b (first inclined surface), the winding lever 14 can rotate together with the winding shaft 12 in the winding direction of the lashing belt 11 on the winding shaft 12. On the other hand, when the winding lever 14 is rotated in the direction opposite 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 no longer fixed to the winding shaft 12, so that the winding lever 14 can rotate in the direction opposite to the winding direction of the lashing belt 11 without rotating the winding shaft 12. This is a 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 feed latch mechanism 142 can rotate without rotating the winding shaft 12 while moving on the gear inclined surface 13a (second inclined surface).

[0028] To wind the lashing belt 11, one stroke of the lashing belt winding operation (from the state in FIG. 1A to the state in FIG. 2) is repeated multiple times. One stroke of the lashing belt winding operation is defined as the amount of rotation of the winding shaft 12 caused by the rotation of the winding lever 14, which corresponds to the movement of the cylinder rod 141 from its contracted state to its extended state. That is, in one stroke of winding the lashing belt 11, first, when the cylinder rod 141 is in its contracted 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 (FIG. 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 wind the lashing belt 11 onto the winding shaft 12 (FIG. 2). This is repeated multiple times until the required amount of lashing belt is wound.

[0029] When the lashing belt 11 is wound up, in one stroke of winding 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 in a contracted state (FIG. 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 wind the lashing belt 11 onto the winding shaft 12 (FIG. 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 in the winding shaft 12 that tends to rotate in the winding release direction R, which is opposite to the rotation direction W for winding 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 maintain the position of the winding shaft 12, thereby restricting the rotation of the winding shaft 12 and stopping the rotation.

[0031] Stopper 18 is typically a long, thin plate-shaped member having stopper leading end 18a and stopper trailing end 18b so as to protrude and engage with gear teeth 131 of feed gear 13. The extension line of the contact surface between stopper 18 and gear inclined surface 13b (first inclined surface) passes through the center of rotation of winding shaft 12.

[0032] The gear inclined surface 13b (first inclined surface) is configured so that an extension line of the gear inclined surface 13b (first inclined surface) passes through the rotation center of the winding shaft 12. The stopper 18 is held movably 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 rotation axis, and is movable along the gear inclined surface 13b (first inclined surface) between a first position where the stopper 18 abuts against the gear inclined surface 13b (first inclined surface) and engages with the gear inclined surface 13b (first inclined surface) to stop the winding shaft 12, and a second position where the stopper 18 does not abut against 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 where it abuts against the gear inclined surface 13b (first inclined surface) and engages with the gear inclined surface 13b (first inclined surface), stopping the feed gear 13 and the winding shaft 12, and a second position where it does not abut against 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 line of the gear inclined surface 13b (first inclined surface) passing through the center of rotation of the winding shaft 12 so that the extension line of the contact surface between the stopper 18 and the gear inclined surface 13b (first inclined surface) passes through the center of rotation of the winding shaft 12. Therefore, the movement of the stopper 18 between the first position and the second position is typically an up and down movement in the vertical direction (the longitudinal direction of the stopper 18) passing through the center of rotation of the winding shaft 12.

[0034] The movement of the stopper 18 between the first position and the second position can be achieved by various methods. For example, the stopper 18 can be configured to bias the stopper 18 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 stimulate the movement of the stopper 18 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 has a pivot shaft 171 between the lever tip 17a (one end) and the lever rear end 17b (the other end), and is rotatably fixed by the pivot shaft 171. The lashing belt fastening device 1 has a drive cylinder 16 as a drive unit. The drive cylinder 16 can be, for example, an air-driven pneumatic cylinder. The drive cylinder 16 has an extendable control shaft 161. When the control shaft 161 extends, the lever rear end 17b is pushed down and the lever tip 17a rotates around the pivot shaft 171 and rises, and the stopper 18 moves up to the second position. Conversely, when the control shaft 161 is retracted (contracted), the lever rear end 17b rises accordingly and the lever tip 17a drops down, and the stopper 18 moves down to the first position due to the biasing force. The biasing of the stopper 18 toward the multiple gear teeth 131 can be achieved by biasing the stopper 18 itself, for example by attaching a spring to the stopper 18, or by applying a biasing force to the stopper lever 17 such that the lever tip 17a (one end) descends, thereby biasing the stopper 18 toward the multiple gear teeth 131.

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

[0037] That is, in the lashing belt fastening device 1, when the stopper 18 abuts against the gear inclined surface 13b (first inclined surface) and engages with the gear inclined surface 13b (first inclined surface), the take-up shaft 12 does not rotate even due to the tension of the lashing belt 11 (fixed state of the lashing belt 11). On the other hand, when the engagement between the stopper 18 and the gear inclined surface 13b (first inclined surface) is released, the take-up shaft 12 becomes rotatable (movable state of the lashing belt 11).

[0038] Furthermore, in the lashing belt fastening device 1, when the feed latch mechanism 142 of the winding lever 14 abuts against 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 rotation of the winding lever 14 can rotate the winding shaft 12. 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 can rotate without rotating the winding shaft 12.

[0039] Therefore, in one-stroke winding operation of the lashing belt fastening device 1, when the stopper 18 is disengaged from the gear inclined surface 13b (first inclined surface) while the feed latch mechanism 142 of the winding lever 14 abuts against 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 shaft 12 is made rotatable, and the winding lever 14 is rotated a predetermined amount in the winding direction of the lashing belt 11 to wind the lashing belt 11 around the winding shaft 12. Then, the stopper 18 is engaged with the gear inclined surface 13b (first inclined surface) to restrict the rotation of the winding shaft 12, and the winding lever 14 is rotated a predetermined amount in the direction opposite to the winding direction of the lashing belt 11, thereby returning the lashing belt 11 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) face each other and come into contact. A force P in the unwinding direction R, which is opposite to the rotation direction W for winding the lashing belt 11, is applied to the side surface of the stopper tip 18a via the gear inclined surface 13b (first inclined surface). The force P is a force generated on the gear inclined surface 13b (first inclined surface) in response to a rotation moment about the center of rotation of the winding shaft 12, which corresponds to the tension of the lashing belt 11. The 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 the force P.

[0041] The stopper 18 itself does not have a rotation axis, and the side of the stopper 18 can simply move in a direction passing through the center of rotation of the winding shaft 12. Therefore, even if a force P is applied to the side of the stopper 18 from the gear inclined surface 13b (first inclined surface), excluding this frictional force, the stopper 18 can be moved between the first position and the second position with a light 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 Winding lever 142,942 Latch mechanism 141,941 Cylinder rod 15,95 Guide roller 16,96 Drive mechanism (drive cylinder) 161,961 control shaft 17 Stopper lever 18,97 Stopper 171,971 Rotating shaft

Claims

1. Lashing belts and a winding shaft that fixes one end of the lashing belt and winds up the lashing belt; a plurality of gear teeth arranged around a center of rotation of the winding shaft; A lashing belt fixing device comprising: a stopper that engages with the gear teeth to stop the rotation of the winding shaft due to the tension of the lashing belt; Each of the plurality of gear teeth includes a first inclined surface; the first inclined surface has an extension line passing through the rotation center of the winding shaft, The stopper is movable along the first inclined surface between a first position where it abuts against the first inclined surface and engages with the first inclined surface to stop the lashing belt, and a second position where it does not abut against the first inclined surface and allows the winding shaft to rotate.

2. 2. The lashing belt fixing device according to claim 1, a disk 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. 3. The lashing belt fixing device according to claim 2, A lashing belt fixing device in which each of the plurality of gear teeth has a second inclined surface shaped such that the distance from the center of rotation of the winding shaft gradually decreases from the position of the first inclined surface that is farthest from the center of rotation of the winding shaft in the winding direction of the lashing belt on the winding shaft.

4. 4. The lashing belt fixing device according to claim 3, The winding shaft is provided with a winding lever that is concentric with the rotation center of the winding shaft and rotates relative to the winding shaft, the winding lever includes a latch mechanism that is capable of abutting against and engaging with the first inclined surface, A lashing belt fixing device, wherein the winding lever is rotatable in the winding direction of the lashing belt on the winding shaft when the latch mechanism is engaged 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. 5. The lashing belt fixing device according to claim 4, When the winding lever is released from the engagement with the first inclined surface of the latch mechanism, The stopper abuts against the first inclined surface and engages with the first inclined surface.

6. 6. The lashing belt fixing device according to claim 5, A stopper lever is provided which rotates around a rotation axis, When the other end of the stopper lever is lowered, one end of the stopper lever is raised, and the stopper is accordingly moved to the second position; When the other end of the stopper lever rises, the one end of the stopper lever lowers, and the stopper moves to the first position accordingly.

7. 7. The lashing belt fixing device according to claim 6, A lashing belt fixing device, wherein the stopper is biased toward the plurality of gear teeth.

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