A new type of strap tightener

Abstract

This invention provides a novel strap tightener, relating to the field of cargo strapping technology. It includes a support, a first winding shaft for winding a first section of securing rope, a second winding shaft for winding a second section of securing rope, a first-axis clamping plate, a second-axis clamping plate, and a handle. The first and second winding shafts are pivotally connected to the support. Ratchets are coaxially mounted on the first and second winding shafts, respectively. The first-axis clamping plate is movably mounted on the support along the radial direction of the first winding shaft and corresponds to the pawl of the first ratchet. By using two winding shafts, the securing ropes wound on both winding shafts can initially extend freely to secure the cargo. The position of the support can be adjusted by winding and unwinding the two securing ropes according to the actual situation, placing the support in the optimal position and avoiding limitations imposed by the actual scenario. Positioning the support in the center of the securing ropes on both sides also balances the pressure exerted on the cargo by the securing ropes on both sides.

Description

Technical Field

[0001] This invention relates to the field of cargo bundling technology, specifically a novel bundling strap tightener. Background Technology

[0002] During freight transport, goods often need to be secured to prevent them from falling off or colliding. Traditionally, goods are secured directly with ropes. While this method is versatile, it is time-consuming, labor-intensive, and makes it difficult to secure the goods tightly.

[0003] To address the shortcomings of traditional cargo securing methods, cargo tightening devices are commonly used to secure goods. Commonly available cargo tightening devices include an adjustable strap tightening and locking mechanism (Chinese Patent Publication No. CN117819056A) and a pre-tension ratchet-type cargo tightening device (Publication No. CN 213832237 U). Both operate on similar principles: one end of the rope is fixed to the carrier, and the other end is wound around a rotating shaft with a ratchet. After securing both ends of the rope, turning the ratchet on the rotating shaft with a handle causes the movable end of the rope to continuously wind up, achieving the tightening effect.

[0004] However, existing tie-down tighteners as described above have the following shortcomings: First, since one section of the rope is fixed, when the two sections are tied together, the tightener is positioned at a fixed point. The fixed section of the rope is often shorter, meaning the main body of the tightener is frequently located near the fixed section, which is also the side of the cargo. Since the tightener is fixed near the cargo's point on the fixed section and cannot move, it often comes into contact with other cargo or carriers due to limitations in the setup. Second, when the tightener is near the fixed section, the length of the fixed section is much shorter than the length of the movable section. This results in uneven tightening force on both sides, easily leading to greater pressure on the movable side of the rope.

[0005] This case arose because of the aforementioned defects in existing tighteners. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a novel strap tightener capable of adjusting the position of the tightener body, thus solving the problems mentioned in the background section.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a novel binding strap tightener, comprising a support, a first winding shaft for winding a first section of fixing rope, a second winding shaft for winding a second section of fixing rope, a first shaft clamping plate, a second shaft clamping plate, and a handle. The first and second winding shafts are pivotally connected to the support. A ratchet wheel is coaxially mounted on the first and second winding shafts, respectively. The first shaft clamping plate is movably mounted on the support along the radial direction of the first winding shaft and corresponds to the first pawl of the first ratchet wheel. The second shaft clamping plate is movably mounted on the support along the radial direction of the second winding shaft and corresponds to the second pawl of the second ratchet wheel. The handle is rotatably mounted on the support and coaxially arranged with the winding shafts. The handle is equipped with a locking mechanism for locking the first ratchet wheel.

[0010] Preferably, the locking mechanism includes a lever and a guide plate. The tail of the lever is provided with a sliding post. The handle is provided with a sliding cavity for the sliding post to slide. A spring is sleeved on the sliding post. A limiting groove for the lever to be inserted is provided between two adjacent pawls. The guide plate is located on the support outside the ratchet. The outer edge of the guide plate is provided with an initial positioning groove, an adjusting arc segment, and a locking positioning groove in a clockwise direction. The side of the lever is provided with a guide block that can slide along the length of the outer edge of the guide plate. When the guide block is in the initial positioning groove, the lever is not in contact with the ratchet. When the guide block is in the adjusting arc segment or the locking positioning groove, the lever can be inserted into the limiting groove.

[0011] Preferably, the handle is also provided with a linkage mechanism. When the guide block is located in the adjustment arc or locking positioning groove, the linkage mechanism can simultaneously push the two-axis clamping plate to clamp the ratchet pawl of the ratchet wheel.

[0012] Preferably, the linkage mechanism includes a second guide plate, which is disposed on the handle and coaxially arranged with the take-up shaft. The outer ring of the second guide plate has a protruding section and a recessed section arranged sequentially in a clockwise direction. When the guide block is located in the initial positioning groove, the recessed section contacts the second-axis locking plate, and at this time the second-axis locking plate does not contact the second pawl. When the guide block is located in the adjusting arc section or the locking positioning groove, the protruding section contacts the second-axis locking plate, and at this time the second-axis locking plate is engaged between two adjacent second pawls.

[0013] Preferably, a connecting rod is provided at the tail of the one-axis clamping plate, a slide rail is provided on the support for the connecting rod to slide, and a spring is sleeved on the connecting rod.

[0014] Preferably, a column is vertically provided on the support, a torsion spring is sleeved on the column, a fixing hole is provided on the two-axis clamping plate, and the two ends of the torsion spring abut against the support and the fixing hole respectively.

[0015] Preferably, both the first and second winding shafts are hollow and have openings. Both the first and second winding shafts have an inner shaft coaxially arranged inside, and the end of the inner shaft is used to fit the fixing rope.

[0016] (III) Beneficial Effects

[0017] This invention provides a novel strap tightener. It has the following advantages:

[0018] 1. This new type of strap tightener has two winding shafts. In the initial state, the fixing ropes wound on winding shaft one and winding shaft two can be extended freely to fix the goods. The position of the support can be adjusted by winding and unwinding the two fixing ropes according to the actual situation, so as to place the support in the optimal position and avoid the support being limited by the actual situation. At the same time, placing the support in the middle of the fixing ropes on both sides can also balance the pressure of the fixing ropes on the goods.

[0019] 2. This new type of strap tightener, through the cooperation between the locking mechanism and the linkage mechanism, only requires moving the handle to the designated area to complete the tightening of the fixed rope and simultaneously lock the first and second winding shafts. The operation is relatively simple and convenient. Attached Figure Description

[0020] Figure 1 This is an isometric view of the present invention;

[0021] Figure 2 This is a diagram showing the correspondence between the one-axis clamping plate and the ratchet of the present invention;

[0022] Figure 3 This is a schematic diagram of the winding shaft and inner shaft of the present invention;

[0023] Figure 4 This is a schematic diagram showing the position of the guide block in the initial state of the present invention;

[0024] Figure 5 This is a schematic diagram showing the positions of the dial plate and the two-axis clamping plate in the initial state of the present invention;

[0025] Figure 6 This is a schematic diagram showing the position of the guide block during the tightening operation of the present invention;

[0026] Figure 7 This is a schematic diagram showing the positions of the lever plate and the two-axis clamping plate in the tightening operation state of the present invention;

[0027] Figure 8 This is a schematic diagram showing the position of the guide block in the locked state according to the present invention;

[0028] Figure 9 This is a schematic diagram showing the positions of the lever plate and the two-axis clamping plate in the locked state of the present invention.

[0029] In the diagram: 1. Support, 2. Take-up shaft I, 21. Inner shaft, 3. Take-up shaft II, 4. Ratchet I, 41. Pawl I, 42. Limiting slot, 5. First axis retaining plate, 51. Connecting rod, 52. Slide rail, 53. Spring I, 6. Second axis retaining plate, 61. Column, 62. Torsion spring, 63. Fixing hole, 7. Handle, 8. Guide plate II, 81. Protruding section, 82. Recessed section, 9. Guide plate I, 91. Initial positioning slot, 92. Adjusting arc section, 93. Locking positioning slot, 10. Dial plate, 101. Sliding column, 102. Sliding cavity, 103. Spring II, 11. Guide block, 12. Ratchet II, 13. Pawl II, 14. Clockwork spring box. Detailed Implementation

[0030] This invention provides a novel strap tightener, such as... Figure 1-9 As shown, it includes a support 1, a first winding shaft 2 for winding the first section of the fixed rope, a second winding shaft 3 for winding the second section of the fixed rope, a first shaft clamping plate 5, a second shaft clamping plate 6, and a handle 7.

[0031] like Figure 3 As shown, take-up shaft 2 and take-up shaft 3 are pivotally connected to bracket 1. Take-up shafts 2 and 3 are arranged side-by-side. Both take-up shafts 2 and 3 are hollow and have openings. Each take-up shaft 2 and 3 has an inner shaft 21 coaxially arranged inside, on which the end of the fixing rope is fitted. The fixing rope extends out of the opening of the take-up shaft and is wound around it. The fixing rope on take-up shaft 2 is wound clockwise, and the fixing rope on take-up shaft 3 is wound counterclockwise.

[0032] like Figure 2 As shown, ratchet 1 4 and ratchet 2 12 are coaxially mounted on take-up shaft 1 2 and take-up shaft 2 3, respectively. Ratchet 2 12 is a conventional ratchet with a ring of pawls 2 13 around its exterior. Ratchet 1 2 is an improvement on the conventional ratchet, with a ring of pawls 41 around its exterior and a recessed limiting groove 42 at the junction of two adjacent pawls 41.

[0033] like Figure 1 As shown, two spring boxes 14 are provided on the outer side of the support 1. The two spring boxes 14 correspond to the winding shaft 1 2 and the winding shaft 2 3 respectively. The winding shaft 1 2 and the winding shaft 2 3 are coaxially connected to the spring shaft at the center of the spring box 14. A spring is wound on the spring shaft. The inner end of the spring is fixed to the spring shaft, and the outer end is fixed to the inner wall of the spring box 14.

[0034] When the fixed rope is pulled out from the winding shaft 1 (2) and winding shaft 2 (3), it can be linked to the mainspring to wind. The mainspring provides a certain preload when the fixed rope is wound up, which facilitates the winding of the fixed rope.

[0035] like Figure 2As shown, a primary clamping plate 5 is movably mounted on a support 1 along the radial direction of the take-up shaft 2, and corresponds to the pawl 41 of the ratchet 4. A connecting rod 51 is provided at the tail of the primary clamping plate 5, and a slide rail 52 is provided on the support 1 for the connecting rod 51 to slide. A spring 53 is sleeved on the connecting rod 51. The spring 53 supports the primary clamping plate 5. When no external force is applied, the distance between the end of the primary clamping plate 5 and the axis of the take-up shaft 2 is less than the outer diameter of the pawl 41 and greater than the inner diameter of the pawl 41. The primary clamping plate 5 will not enter the limiting groove 42.

[0036] like Figure 1 As shown, the two-axis clamping plate 6 is movably mounted on the support 1 along the radial direction of the take-up shaft 3, and corresponds to the pawl 13 of the ratchet 12. The two-axis clamping plate 6 is horizontally positioned, and a horizontal groove is provided on the support 1. A slider that slides within the groove is provided at the end of the two-axis clamping plate 6. A receiving groove is provided on the support 1, and a column 61 is vertically positioned within the receiving groove. A torsion spring 62 is fitted on the column 61. A fixing hole 63 is provided on the two-axis clamping plate 6, and the two ends of the torsion spring 62 abut against the support 1 and the fixing hole 63, respectively. The torsion spring 62 is used to support the two-axis clamping plate 6. When no external force is applied, the end of the two-axis clamping plate 6 is not in contact with the pawl 13 of the ratchet 12.

[0037] The handle 7 is rotatably mounted on the support 1 and is arranged coaxially with the take-up shaft 2, but the handle 7 and the take-up shaft 2 are independent of each other and do not interfere with each other when rotating. The handle 7 is provided with a locking mechanism for locking the ratchet 4.

[0038] like Figure 1 As shown, the locking mechanism includes a lever plate 10 and a guide plate 9. The tail of the lever plate 10 is provided with a sliding post 101. The handle 7 is provided with a sliding cavity 102 for the sliding post 101 to slide. The sliding cavity 102 is arranged radially along the winding shaft 2. A spring 103 is sleeved on the sliding post 101. The spring 103 is used to provide tension to the lever plate 10. The lever 10 can be inserted into the limiting slot 42 under the action of the spring 103. The guide plate 9 is set on the support 1 and located outside the ratchet 4. The outer edge of the guide plate 9 is provided with an initial positioning slot 91, an adjusting arc segment 92, and a locking positioning slot 93 in a clockwise direction. The adjusting arc segment 92 is arc-shaped and has the same center as the take-up shaft 2. The initial positioning slot 91 and the locking positioning slot 93 are recessed slots. The side of the lever 10 is provided with a guide block 11 that can slide along the length of the outer edge of the guide plate 9. When the guide block 11 is located in the initial positioning slot 91, the lever 10 is not in contact with the ratchet 4. When the guide block 11 is located in the adjusting arc segment 92 or the locking positioning slot 93, the lever 10 can be inserted into the limiting slot 42.

[0039] like Figure 5As shown, a linkage mechanism is also provided on the handle 7. When the guide block 11 is located in the adjustment arc 92 or the locking positioning groove 93, the linkage mechanism can simultaneously push the two-axis clamping plate 6 to clamp the ratchet pawl 13 of the ratchet 12.

[0040] like Figure 5 As shown, the linkage mechanism includes a second guide plate 8, which is mounted on the handle 7 and coaxially arranged with the first take-up shaft 2. The outer ring of the second guide plate 8 has a protruding section 81 and a recessed section 82 arranged sequentially in a clockwise direction. The protruding section 81 is a regular arc shape and is coaxially arranged with the first take-up shaft 2. The recessed section 82 can be an arc shape with a diameter smaller than that of the protruding section 81 or a flat surface; the specific design is not limited. The distance from its outer edge to the axis of the first take-up shaft 2 is less than the distance from the outer edge of the protruding section 81 to the axis. When the guide block 11 is located in the initial positioning groove 91, the recessed section 82 contacts the second-axis locking plate 6, at which time the second-axis locking plate 6 does not contact the second pawl 13. When the guide block 11 is located in the adjusting arc section 92 or the locking positioning groove 93, the protruding section 81 contacts the second-axis locking plate 6, at which time the second-axis locking plate 6 engages between two adjacent second pawls 13.

[0041] The working principle consists of three states:

[0042] State 1 is the initial state. At this time, turn handle 7 to the position shown. Figure 4 At the indicated position, guide block 11 is simultaneously moved into the initial positioning slot 9 with the operator's assistance. At this time, as shown... Figure 5 As shown, the lever 10 is not in contact with ratchet 4, and the two-axis clamping plate 6 is not in contact with ratchet 12. In this state, the fixing ropes wound on the winding shaft 2 and winding shaft 3 can be freely extended to fix the goods, and the position of the support 1 can be adjusted by winding and unwinding the two fixing ropes according to the actual scenario, so as to place the support 1 in the optimal position.

[0043] State two is the tightening operation state. After the fixing rope has initially tied the goods, the operator moves the guide block 11 out of the initial positioning slot 91. At this time, the handle 7 is turned to the position as shown. Figure 6 As shown in the diagram, guide block 11 enters adjustment arc 92. At this point, as... Figure 7 As shown, the lever 10 engages with the limiting slot 42, and the two-axis locking plate 6 engages with the ratchet pawl 13 under the pressure of the protruding section 81, causing the winding shaft 3 to be limited counterclockwise. At this time, the handle 7 can repeatedly drive the winding shaft 2 to rotate counterclockwise in a counterclockwise direction to wind up the excess loose fixing rope onto the winding shaft 2, thereby tightening the binding fixing rope. The first-axis locking plate 5 provides a one-way lock for the ratchet 4 during the tightening operation. When the handle 7 rotates clockwise, the first-axis locking plate 5 locks the clockwise rotation of the ratchet 4, allowing the handle 7 to reciprocate to drive the winding shaft 2 to rotate counterclockwise.

[0044] State three is the locked state. After the tightening operation of the fixing rope is completed, turn handle 7 to the position shown. Figure 8 At the position shown, the guide block 11 enters the locking positioning groove 93. Figure 9 As shown, the lever 10, under the action of the spring 103, engages in the limiting slot 42 of the ratchet 4, thus completely locking the ratchet 4. The two-axis locking plate 6, under the pressure of the protruding section 81, remains pressed against the deepest part between the two pawls 13, completely locking the winding shaft 3 in a counterclockwise direction.

[0045] To untie the securing rope, simply return handle 7 to its original position. Figure 4 The location shown is correct.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel strap tightener, characterized in that: The system includes a support (1), a first winding shaft (2) for winding the first section of the fixed rope, a second winding shaft (3) for winding the second section of the fixed rope, a first shaft clamping plate (5), a second shaft clamping plate (6), and a handle (7). The first winding shaft (2) and the second winding shaft (3) are pivotally connected to the support (1). The first winding shaft (2) and the second winding shaft (3) are respectively coaxially provided with a ratchet wheel (4) and a ratchet wheel (12). The first shaft clamping plate (5) is movably disposed on the support (1) along the radial direction of the first winding shaft (2) and corresponds to the first pawl (41) of the first ratchet wheel (4). The second shaft clamping plate (6) is movably disposed on the support (1) along the radial direction of the second winding shaft (3) and corresponds to the second pawl (13) of the second ratchet wheel (12). Correspondingly, the handle (7) is rotatably mounted on the support (1) and coaxially arranged with the take-up shaft (2). The handle (7) is provided with a locking mechanism for locking the ratchet (4). The locking mechanism includes a lever (10) and a guide plate (9). The tail of the lever (10) is provided with a sliding column (101). The handle (7) is provided with a sliding cavity (102) for the sliding column (101) to slide. A spring (103) is sleeved on the sliding column (101). A limiting slot (42) for the lever (10) to be inserted is provided between two adjacent pawls (41). The guide plate (9) is located on the support (1) on the outside of the ratchet (4). The outer edge of the guide plate (9) The upper part is provided with an initial positioning groove (91), an adjustment arc (92), and a locking positioning groove (93) arranged in a clockwise direction. The side of the dial plate (10) is provided with a guide block (11) that can slide along the outer length of the guide plate (9). When the guide block (11) is in the initial positioning groove (91), the dial plate (10) is not in contact with the ratchet (4). When the guide block (11) is in the adjustment arc (92) or the locking positioning groove (93), the dial plate (10) can be locked into the limiting slot (42). The handle (7) is also provided with a linkage mechanism. When the guide block (11) is in the adjustment arc (92) or the locking positioning groove (93), the linkage mechanism can simultaneously push the two-axis locking plate (6) to lock the ratchet. The second (13) of the second (12) pawl; the linkage mechanism includes the second guide plate (8), which is set on the handle (7) and is arranged coaxially with the first (2) winding shaft. The outer ring of the second guide plate (8) is provided with a protruding section (81) and a recessed section (82) in a clockwise direction. When the guide block (11) is located in the initial positioning groove (91), the recessed section (82) contacts the second shaft clamping plate (6), and at this time the second shaft clamping plate (6) does not contact the second pawl (13). When the guide block (11) is located in the adjusting arc section (92) or the locking positioning groove (93), the protruding section (81) contacts the second shaft clamping plate (6), and at this time the second shaft clamping plate (6) is engaged between two adjacent second pawls (13).

2. The novel strap tightener according to claim 1, characterized in that: The tail of the axial clamping plate (5) is provided with a connecting rod (51), the support (1) is provided with a slide (52) for the connecting rod (51) to slide, and a spring (53) is sleeved on the connecting rod (51).

3. The novel binding strap tightener according to claim 1, characterized in that: A column (61) is vertically arranged on the support (1), and a torsion spring (62) is sleeved on the column (61). A fixing hole (63) is opened on the two-axis clamping plate (6), and the two ends of the torsion spring (62) abut against the support (1) and the fixing hole (63) respectively.

4. The novel strap tightener according to claim 1, characterized in that: Both the first winding shaft (2) and the second winding shaft (3) are hollow and have openings. Both the first winding shaft (2) and the second winding shaft (3) have an inner shaft (21) coaxially arranged inside. The end of the inner shaft (21) is used to attach the fixing rope.

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