CN212797464U

CN212797464U - Tensioner capable of automatically adjusting tension of binding belt

Info

Publication number: CN212797464U
Application number: CN202021254248.8U
Authority: CN
Inventors: 郑小忠
Original assignee: Shenzhen Bohang Industrial Development Co ltd
Current assignee: Shenzhen Bohang Industrial Development Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-03-26
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a but tension strainer of automatically regulated binding area mainly solves current freight, and the goods is binded inconveniently, is difficult for adjusting the problem of elasticity after binding. The tensioner comprises a pin shaft, a ratchet wheel, a spiral adjusting spring, a circular plate, a handle frame, a main latch and other mechanisms. Rotation of the ratchet wheel tightens the cinching strap, preloading the helical adjustment spring to the same tension applied to the strap. If the strap loses tension below the pre-tensioned spring rate of the coil spring, the spring will force the drum pin to rotate and increase the tension on the strap until the pre-tensioning force of the spring and the strap tension are balanced or until the spring has lost all of the pre-tensioning force. Its taut degree safe and reliable, moreover the utility model discloses take place to adjust at any time after becoming flexible at the bandage, adjustment process is simple and easy, labour saving and time saving. Therefore, the method is suitable for popularization and application.

Description

Tensioner capable of automatically adjusting tension of binding belt

Technical Field

The utility model relates to a strainer, specifically speaking relates to a but strainer of automatically regulated tie tension.

Background

In transportation and life, often need tie up tightly various article, especially when large truck or trailer carry out freight, the size and the weight of goods vary, the driver need fix the goods with loading personnel shipment back, generally all bind through banded or strip, currently bind through the manpower usually, however, speed is very fast in the transportation, produce certain jolting, this kind of binding is difficult to take place in jolting, lead to binding untight, it drops to take place the goods easily, lead to property loss and the potential safety hazard on the road.

To avoid this, the driver or the person pressing the goods needs to check whether the strap is tight or not frequently, and once the strap is found to be loose, the tightening of the binding needs to be performed again, which is time-consuming, labor-consuming and needs to be checked frequently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a but tension strainer of automatically regulated binding area mainly solves current freight, and the goods is binded inconveniently, is difficult for adjusting the problem of elasticity after binding.

In order to achieve the above object, the utility model adopts the following technical scheme:

a tensioner capable of automatically adjusting tension of a tying band, comprising:

the binding belt comprises a pin shaft, wherein the pin shaft comprises a first drum pin and a second drum pin which are separated by a space, the space is used for accommodating the binding belt, a first ratchet wheel and a second ratchet wheel are mounted at two ends of the pin shaft, and the first ratchet wheel and the second ratchet wheel can rotate; each ratchet wheel comprises a plurality of ratchet teeth;

first and second helical adjustment springs, each mounted adjacent one of the first and second ratchets, each having a central leg at an outer end thereof and a projection, each projection having an outer end and an inner end;

first and second plates mounted in the first and second helical adjustment springs, respectively, the first and second plates having first and second openings therein for receiving the first and second drum pins, the first and second plates further having arcuate slots formed therein; wherein the center leg of each of the coil adjusting springs is inserted into a space between the first drum pin and the second drum pin, an outer end of the projection of each of the coil adjusting springs is fixedly connected to the corresponding first ratchet wheel and the second ratchet wheel, and an inner end of the projection of each of the coil adjusting springs is located in the corresponding arcuate groove of the first and second plates, respectively.

Further, still include: a base frame having first and second flanges on respective inner sides of the first and second ratchet wheels, the flanges rotatably mounted on the pin, the base frame having slide grooves on both sides;

a handle frame having first and second side surfaces and first and second slots correspondingly disposed on the first and second side surfaces, the first and second side surfaces having ends connected to both ends of a pin shaft and rotating with respect to the pin shaft;

a main latch installed in the slide groove of the base frame and slidable in the slide groove for engaging and disengaging each ratchet of the first and second ratchet wheels; wherein when the ratchet teeth are rotated by rotating the handle frame, the primary latch is moved away from the ratchet teeth by engaging the curved rear surface of the ratchet teeth, engaging the front surface of the next ratchet tooth, holding the ratchet in the forward position for the next ratchet tooth; simultaneously rotating the handle frame loads each of the helical adjustment springs to a limit determined by the length of the arc of each of the arcuate slots, the loaded helical adjustment springs applying a force to the pin such that the pin is slack in the strap.

Further, the first ratchet wheel and the second ratchet wheel are provided with clamping grooves, and the clamping grooves are used for containing the inner ends of the protruding portions of the spiral adjusting springs.

Further, the first plate and the second plate are both circular plates.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a strainer is arranged in the goods to bind when the fag end is tight, and the packing is binded personnel and can be very convenient, strains the bandage with this strainer, and after taut because it realizes fixedly through mechanical means, its taut degree safe and reliable, moreover the utility model discloses can adjust at any time after the bandage takes place not hard up, adjustment process is simple and easy, labour saving and time saving.

Drawings

Fig. 1 is a front side view of a first position of an embodiment of the invention.

Fig. 2 is a rear side view of fig. 1.

Fig. 3 is a schematic diagram of an explosion structure according to an embodiment of the present invention.

Fig. 4 is a perspective view of a tension adjusting apparatus according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of the exploded structure of fig. 4.

Fig. 6 is a perspective view of an embodiment of the invention in a second position.

Fig. 7 is a rear side view of fig. 6.

Figure 8 is a perspective view of the embodiment of the utility model in a third position.

Fig. 9 is a rear side view of fig. 8.

Fig. 10 is a front view of a circular plate of a tension adjusting apparatus according to an embodiment of the present invention.

Wherein, the names corresponding to the reference numbers are:

12-strap, 13-base, 19, 21-drum pin, 29, 31-base end, 23-center leg, 25-helical adjustment spring, 32-through slot, 33-projection, 34-projection outer end, 34' -pretension position, 35-ratchet, 36-projection inner end, 37-sliding slot, 39-primary latch, 40-primary latch locking wing, 41-ratchet tooth, 42-snap slot, 43-primary latch spring, 44-pin slot, 45-handle frame, 47-latch, 49-handle, 50-circular opening, 51-slot, 53-handle latch, 54-handle latch locking wing, 55-handle spring, 56-snap slot, 58-straight end, 59-frame notch, 60-helical end, 61-step, 62-fixed pin, 72-protrusion, 74-extended surface, 76-rear profile, 101-ramp, 146-pin, 150-circular opening, 160-recess rear surface.

Detailed Description

The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.

Examples

As shown in fig. 1 to 10, the present invention discloses a tensioner capable of automatically adjusting tension of a binding band, which comprises a base frame 13 for fixing the binding band 12, a pin shaft 18 composed of two

drum pins

19, 21, wherein the pin shaft 18 rotates in corresponding circular openings 50 in both end portions of the base frame 13. The two ends of the pin shaft 18 are both provided with a spiral adjusting spring 25 and are positioned at the outer sides of the first ratchet wheel 35 and the second ratchet wheel 35 corresponding to the two ends of the pin shaft 18. The pin 18 is rotated about the respective center legs 23 of the coil adjusting springs 25 at both ends, and the inner ends 36 of the protrusions 33 on the outer ends of the coil adjusting springs 25 are inserted into the catching grooves 42 of the ratchet gears 35 and fixedly coupled to the respective ratchet gears 35 by welding.

In the present embodiment, each of the coil adjusting springs 25 is a coil wound spring. The outer end 34 of the projection 33 of each helical adjustment spring 25 snaps into an arcuate groove 46 in a circular plate 48 on the corresponding side. Each circular plate 48 has a pair of through

slots

32, 134 in the middle, which through

slots

32, 134 are used to snap the

ends

20, 22 of the

drum pins

19, 21 so that the circular plate 48 rotates with the

drum pins

19, 21.

Each side of the base frame 13 has an angled slide slot 37, into which slide slot 37 two corresponding main latch wings 40 of a main latch 39 fit. The primary latch 39 is slidable in the slide slot 37 to effect engagement and disengagement with the ratchet teeth. Each ratchet 35 is spring compressed by the main latch spring 43 toward each ratchet 35. The primary latch spring 43 is mounted on a pin 146 projecting from the rear side of the primary latch 39 and is held in place by an upstanding projection on the base 13 having a pin slot 44 through which the pin 146 engages.

The handle frame 45 has circular openings 150 at both ends, the

ends

20, 22 of the

drum pins

19, 21 are inserted into the corresponding circular openings 150, and the

drum pins

19, 21 are fixed with the handle frame 45 by two bolts 47 inserted into the

drum pins

19, 21 at both sides, respectively.

The handle frame 45 has an easy to grasp handle 49 at one end and a pair of slots 51 with handle latch lock wings 54 in the slots 51. The handle latch 53 slides in the slot 51 and engages a corresponding one of the ratchet teeth. The handle latch 53 is spring loaded to the ratchet 35 by the handle. The handle latch 53 has a catch slot 56, the straight end 58 of the handle spring 55 fits into the catch slot 56, and the helical end 60 of the handle spring 55 fits over a fixed pin 62 in the slot 51 of the handle frame 45.

By inserting the strap 12 into the pin through the gap 57 between the two

drum pins

19, 21 as shown in figure 1, in the first position, the primary latch 39 engages each ratchet wheel 35 by engaging the front surface of the ratchet wheel teeth, as shown in figure 2, with the handle frame 45 at its lowest point of rotation, substantially parallel to the base frame 13. In this position, the rear surface 160 of each frame notch 59 of the handle frame 45 engages each locking wing 40 of the primary latch 39 and prevents the primary latch 39 from disengaging the ratchet teeth.

In the first position shown in fig. 1 and 2, the extended surface 74 of the spring-loaded handle latch 53 engages each ratchet wheel 35 by engaging the front surface of a pair of ratchet teeth disposed opposite one another. In this position, each projection 72 on the handle latch 53 also locks behind a corresponding step 61 formed on the circumference of the base frame 13, preventing the handle latch 53 from rotating about the drum 18.

As shown in fig. 6, the projection 72 on the handle latch 53 is disengaged from the step 61 in the base frame 13 by pulling the handle 68 of the handle latch 53 away from the base frame 13 in the direction of the arrow against the spring force, and then the handle frame 45 can be rotated to the state shown in fig. 1 and 2. This action also engages the locking wings 40 of the primary load latch 39 with the recess rear surface 160 of the frame recess 59 so that the primary load latch 39 is free to slide back and forth in its respective slide slot 37 when engaged with the ratchet teeth.

The arc is formed by rotating the handle frame 45 from the second position shown in fig. 2 to the third position. As shown in fig. 8, it rotates from the third position back to the second position and each ratchet wheel 35 will rotate through the same arc. In this embodiment, the arc is equal to three ratchet teeth in a total of eleven arcs, equal to about 98 degrees. This rotation rotates the

drum pins

19, 21 by the same angle with each main load spring 25 as long as there is no tension load on the strap 12. At the same time, the primary latch 39 reciprocates back and forth along the rear cam or profile 76 of three consecutive ratchet teeth 41 of each ratchet 35, thereby "ratcheting" 3 times in the ratchet 35. At the end of this ratcheting action, the primary load latch 39 again engages behind the flat surface of the next successive ratchet tooth of each ratchet 35, as shown in FIG. 3.

After the handle frame 45 reaches the condition of fig. 3, it is rotated from that condition back to the condition of fig. 2, as shown in fig. 8, with the handle latch 53 sliding back and forth following the rear profile 76 of each ratchet tooth, again "ratcheting" three times and engaging the flat of the other pair of ratchet teeth at the end of the stroke. During return from the third position to the second position, the

drum pins

19, 21 do not rotate and the tension on the straps is maintained by the primary load latch 39.

This process of rotating the handle frame 45 between the second and third positions will continue and will apply additional load to the strap 12, and therefore each primary load spring 25 will also be preloaded to the same tension level. When each coil adjustment spring 25 is preloaded, each outer end 34 of each projection 33 of each coil adjustment spring 25 will begin to move in an arc in its respective arcuate slot 46, the arc being limited by the included angle a in the arcuate slot 46 in each circular plate 48. In this embodiment, when the coil adjusting spring 25 is wound to full pretension, the outer end 34 of the projection 33 slides through the arcuate slot 46 until it reaches the full pretension position 34' at the opposite end of the arc, as shown in fig. 3. In the present embodiment, angle a is 110 degrees, but in other embodiments, angle a may range from 90 degrees to 180 degrees, depending on the spring force selected. In this embodiment, the center of the arc of the arcuate slot 46 is also the center of the circular plate 48.

Once each of the coil adjustment springs 25 has passed the preload angle of approximately 110 degrees, the engagement of the outer end 34 of the projection 33 of each of the primary load springs 25 with the arcuate slot 46 in the circular plate 48 prevents further preload of the primary load. The coil adjustment spring 25 is prevented from overloading and any further tension generated by rotating the handle frame 45 from the second position to the third position will now in turn directly rotate the drum pins 19, 21 and apply additional load tension to the strap 12. When the cinching operation is complete, the tensioner is in the locked position shown in fig. 1 and 2.

If the strap 12 loses tension below the pre-tensioned spring rate of the helical adjustment spring 25, the helical adjustment spring 25 will force the drum pins 19, 21 to rotate and increase the tension on the strap 12 until pre-tensioned. The tension of the coil adjusting spring 25 and the tension of the strap are in equilibrium until the coil adjusting spring 25 loses all pre-tension.

As shown in fig. 9, when the tensioner is in the position shown in fig. 9. As shown in FIG. 8, further pulling of the handle latch handle 68 in the direction of arrow 70 against its spring bias moves the handle frame 45 to the state shown in FIG. 4. This action completely disengages the handle latch 53 from the ratchet teeth. At the same time, the ramp 101 on the exterior of the handle frame 45 also pushes the primary load latch 39 away from the ratchet teeth 41. This effectively allows the drum pins 19, 21 to rotate completely freely, relieving tension on the strap 12 and releasing any remaining tension on the helical adjustment spring 25.

Through the above design, the utility model discloses a strainer is arranged in the goods to bind when the fag end is tight, and the packing is binded personnel and can be very convenient, strains the bandage with this strainer, and taut back because it realizes fixedly through mechanical means, its taut degree safe and reliable, moreover the utility model discloses take place to adjust at any time after becoming flexible at the bandage, adjustment process is simple and easy, labour saving and time saving. Thus, there are substantial features and advances over the prior art.

The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.

Claims

1. A tensioner capable of automatically adjusting tension of a tying band, comprising:

2. The tensioner as claimed in claim 1, further comprising:

a base frame having first and second flanges on respective inner sides of the first and second ratchet wheels, the flanges rotatably mounted on the pin, the base frame having slide grooves on both sides;

3. The tensioner as claimed in claim 1, wherein the first ratchet wheel and the second ratchet wheel are each provided with a catch for receiving an inner end of the projection of the helical adjustment spring.

4. The tensioner as claimed in claim 1, wherein the first plate and the second plate are circular plates.