Tire securing jig and tire securing device

Abstract

To provide a tire securing jig which can reduce a load when a tire overcomes, and a tire securing device.SOLUTION: A torsion spring 16 is fitted to a swing shaft 15. One end of the torsion spring 16 contacts so as to press a top face inner side of a position holding part 13, and the other end thereof contacts so as to press a groove 17 formed at a position overlapping the swing shaft 15 in a vertical direction on the top face. Therefore, the position holding part 13 is energized by the torsion spring 16 so that a tip thereof swings to a side of a floor plate. Further, the position holding part 13 is so configured that the whole of itself is positioned inside a ridge line of a jig body part 11 when viewed from a width direction of a tire T in the state of being fixed to the floor plate 30.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a tire securing jig for securing a tire to be secured to a floor plate of a vehicle, and a tire securing device equipped with the tire securing jig. [Background technology]

[0002] Conventionally, when vehicles are loaded onto a vehicle transporter or the like for transport, a method of securing the tires using securing belts fixed to the floor board on which the vehicle is placed has been used, and a tire securing device such as that disclosed in Patent Document 1 has been used to secure the tires in this manner.

[0003] The tire lashing device disclosed in Patent Document 1 is configured by attaching hooks (reference numerals 25 and 26 in Figure 8 of Patent Document 1) to which lashing belts are hung, to a lashing jig (reference numeral 60f in Figure 8 of Patent Document 1) fixed to a floor plate. The lashing jig has its jig hook portions (reference numerals 62a to 62d in Figure 8 of Patent Document 1) inserted into fixing holes drilled in the floor of the loading platform and moved in the width direction of the tire, and then its rod portion (reference numeral 68 in Figure 8 of Patent Document 1) is fitted into the fixing hole to be fixed to the floor plate.

[0004] When securing a vehicle using such a tire lashing device, first, lashing jigs are secured to the front and rear of each tire. Next, a hook connected to one end of a lashing belt is attached to one lashing jig, and a hook around which a lashing belt is looped is attached to the other lashing jig, and the other end of the lashing belt is secured to a floor board or the like. The lashing belt is then placed over the top of the tire and tightened. Once all the tires are secured by the lashing belts, the vehicle is secured to the floor board. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2022-180147 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the tire securing device disclosed in Patent Document 1 has a structure in which the rod portion of the securing jig protrudes above the floor plate beyond other parts, and when fixed, the height including the rod portion is such that the tire can climb over it. Therefore, it is possible to move a vehicle with the lashing jig fixed to the floor panel, but in this case, a stronger force is required to move the vehicle in the direction of travel compared to when the tire is running on the floor surface. Also, because the upper surface of the rod portion is narrower than the other parts of the lashing jig, the ground contact pressure is likely to be greater compared to when the tire is running on other parts. For this reason, when the tire climbs over the securing jig, the contact area between the tire and the rod portion is likely to wear out.

[0007] When securing a vehicle using such a tire securing device, the ideal approach is to secure the securing jig to the floor plate just before securing the tire during loading, and then, when unloading, to release the tire from the securing jig and remove it from the floor plate so that the tire runs only on the floor plate, thereby avoiding stress on the tire.

[0008] However, if the operator is inexperienced, there is a possibility that the vehicle will be driven with the securing jig still in a fixed state, which may result in tire wear as described above. Since it is difficult to completely eliminate human error, a structure is required that can suppress tire wear even when the vehicle is moved while the securing jig remains fixed.

[0009] In view of the above circumstances, an object of the present invention is to provide a tire securing jig and a tire securing device that can reduce the load when a tire goes over an obstacle. [Means for solving the problem]

[0010] The first invention is a tire securing jig that forms part of a tire securing device for securing a tire to be secured to a floor plate using a fastener, and that is secured to the floor plate by inserting its lower part into a fixing hole formed in the floor plate and moving it in a predetermined direction along the width direction of the tire.The tire securing jig comprises: a main body portion that is positioned above the floor plate when in the fixed state; and a position holding portion that is supported by the main body portion and is positioned inside the fixing hole when in the fixed state, thereby preventing movement in the direction opposite to the predetermined direction, and the position holding portion is configured so that, at least when in the fixed state, the entire position holding portion is positioned at a height below the portion of the main body portion that is positioned highest from the floor plate.

[0011] The second invention is a tire securing jig characterized in that the position holding portion described in the first invention is configured so that, at least when in the fixed state, the entire portion is positioned inside the ridge line of the main body portion when viewed in the width direction of the tire.

[0012] The third invention is a tire securing jig characterized in that the position holding portion described in the first or second invention has a base end supported so as to be swingable around an axis that is aligned in the fore-and-aft direction of the tire when in the fixed state and that is positioned entirely above the floor plate when in the fixed state.

[0013] The fourth invention is a tire securing jig characterized in that the position-retaining portion described in the third invention is subjected to a biasing force that can be countered by human force in a direction in which the tip portion is pressed against the floor plate from above.

[0014] A fifth invention is a tire tying device equipped with the tire tying jig according to any one of the first to fourth inventions. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a tire securing jig and a tire securing device that can reduce the load when a tire goes over a barrier. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a diagram showing the structure of a tire securing device according to a first embodiment of the present invention. FIG. [Figure 2] 1A is a diagram showing the structure of a tire fastening jig according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along the line AA. [Figure 3] 5A to 5C are diagrams illustrating an operation when fixing the tire fastening jig according to the first embodiment of the present invention to a floor plate. [Figure 4] FIG. 2 is a diagram showing a state in which a tire is fastened using the tire fastening device according to the first embodiment of the present invention. [Figure 5] 1A is a diagram showing the positional relationship between a tire securing jig and a tire according to a first embodiment of the present invention, and FIG. 1B is a diagram showing the contact portion when the tire passes over the securing jig. [Figure 6] 10(a) is a diagram showing the structure of a tire fastening jig according to a second embodiment of the present invention, and FIG. 10(b) is a view taken along line B. [Figure 7] FIG. 10 is a diagram showing the positional relationship between a tire and a tire fastening jig according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] First Embodiment A tire tying jig according to a first embodiment of the present invention will be described below with reference to the drawings as appropriate. Note that the drawings are schematic. Therefore, it should be noted that the relationship and ratio between thickness and planar dimensions may differ from the actual relationship and ratio between the drawings. Furthermore, the embodiments shown below are merely examples of devices and methods for embodying the technical concept of the present invention, and the technical concept of the present invention does not limit the materials, shapes, structures, arrangements, etc. of the components to the following embodiments.

[0018] <Structure of tire securing jig> The structure will be described mainly with reference to FIGS. The tire securing jig 10 comprises a jig main body 11, jig fixing portions 12a, 12b, 12c, and 12d (hereinafter, the representative symbol 12 will be used when there is no need to distinguish between them) formed at four locations on the jig main body 11, and a position holding portion 13.

[0019] The jig body 11 is formed in a roughly inverted U-shape when viewed from the longitudinal direction, and has a top surface 11a, which is a flat surface parallel to the floor board, at the part located highest from the floor board when fixed to the floor board. In addition, hook insertion holes 14a, 14b, and 14c (hereinafter, the representative reference number 14 will be used when there is no need to distinguish between them) are formed in three places on the top surface 11a, lined up in the longitudinal direction. The jig fixing portion 12 is formed integrally with the jig main body portion 11 and extends in an approximately L-shape from the longitudinal end of the jig main body portion 11 and from a position approximately two-thirds of the way from that end to the opposite end.

[0020] A jig hook 20 is fixed to the tire securing jig 10. The jig hook 20 includes a belt fixing portion 21 formed in a substantially U-shape to which a fastening belt B, which is a fastening tool, is fixed, and a retaining portion 22 to be inserted into the hook insertion hole 14 . A cylindrical connecting portion 23 is attached to the belt fixing portion 21. The connecting portion 23 is a component used to connect the lashing belt and the jig hook 20. Specifically, the connection is achieved by passing the connecting portion 23 through the annular portion BR provided at the end of the lashing belt B shown in FIG. 4, and then passing a support shaft through a shaft support hole 24 formed in the belt fixing portion 21.

[0021] The jig hook 20 is fixed to the tire securing jig 10 by aligning the longitudinal direction of the anti-slip portion 22 with the longitudinal direction of the main body portion and inserting it into the hook insertion hole 14, and then rotating the jig hook 20 90 degrees at a position where the underside of the belt fixing portion 21 abuts against the upper surface 11a of the jig main body portion 11.

[0022] As shown in Fig. 2(a), the position-maintaining part 13 is formed in a substantially inverted U-shape when viewed in the longitudinal direction, and has a hook hole 13a formed in its upper surface. The hook hole 13a is formed for the purpose of enabling an operator to easily operate the position-maintaining part 13 by hooking their finger therein when changing the state of the tire securing jig 10 from a state in which it is fixed to a floor plate 30 (described later) to a state in which it can be removed from the floor plate 30. In addition, as shown in Fig. 2(b), the base end of the position-maintaining part 13 is swingably supported on a swing shaft 15 oriented along the short-side direction of the jig main body 11. As shown in FIG. 3, the swing shaft 15 is an axis that extends along the front-rear direction of the tire and is entirely located above the floor plate when the tire securing jig 10 is fixed to the floor plate. A torsion spring 16 is fitted into the oscillation shaft 15. One end of the torsion spring 16 abuts against the inside of the upper surface of the position holding part 13 so as to press against it, and the other end abuts against a groove 17 formed on the upper surface at a position overlapping with the oscillation shaft 15 in the vertical direction so as to press against it. Therefore, the position maintaining portion 13 is biased by the torsion spring 16 so that the tip end thereof is pressed against the floor surface.

[0023] Also, as shown in Figure 2(a), when the position holding portion 13 is fixed to the floor board 30 described later, it is configured so that its entirety is positioned inside the ridge line of the jig main body portion 11 when viewed from the width direction of the tire T. In other words, the position maintaining portion 13 is configured so as not to protrude from the main body portion when viewed in the width direction of the tire T.

[0024] <Fixing to floorboards> Next, a method for fixing the tire fastening jig 10 to the floor plate will be described with reference to FIG. First, as shown in FIG. 3(a), the jig fixing portion 12 is inserted into a fixing hole formed in the floor board. 3(b), the tire securing jig 10 is moved in a predetermined direction so that the front jig fixing portions 12a and 12b abut against the reinforcing rib 33 of the floor board 30 and the rear jig fixing portions 12c and 12d abut against the reinforcing bar 34. The predetermined direction is the direction along the width direction of the tire when securing the tire, which will be described later.

[0025] In the state shown in Figure 3(a), the position-maintaining part 13 abuts against the upper surface of the floorboard 30 and assumes a position such that its tip faces upward. When the tire lashing jig is moved to the state shown in Figure 3(b), the fixing hole 31a that was occupied by the rear jig fixing parts 12c and 12d becomes positioned below the position-maintaining part 13. Therefore, gravity and the biasing force of the torsion spring 16 cause the position-maintaining part 13 to swing so that its tip faces downward, and part of the tip moves into the fixing hole 31a.

[0026] The position-maintaining part 13, which has moved into the fixing hole 31a in this way, acts as a stop bar that prevents the tire lashing jig 10 from moving when the tire lashing jig 10 tries to move in the opposite direction, with its tip hitting the wall of the fixing hole 31a. Therefore, while the tip of the position-maintaining part 13 is positioned inside the fixing hole 31a, the tire lashing jig 10, which is fixed to the floor plate, cannot move to a position where it can be detached from the floor plate due to external force, vibration, etc. In the following description, the state in which the tire securing jig 10 has the jig fixing portion 12 inserted into the fixing hole and cannot be moved to a position where it can be removed from the floor board 30 by the position holding portion 13 will be referred to as the "fixed state."

[0027] To release the tire securing jig 10 from the fixed state, the worker manually swings the position holding part 13 against the biasing force of the torsion spring 16, and moves it in the opposite direction to when it was fixed with its tip pointing upward. Then, after moving the jig fixing part 12 to a position where the entire jig fixing part 12 overlaps with the fixing hole 31, the tire securing jig 10 is released by pulling the jig fixing part 12 out of the fixing hole 31.

[0028] <How to secure tires> A method for fastening a tire using the tire fastening device according to this embodiment will be described with reference to Figures 3 and 4. Note that the following description will be given taking the left front tire T of a four-wheeled passenger vehicle as an example, and a description of the fastening method for other tires will be omitted. First, the tire stop block TS is installed on the floor plate 30 in accordance with the stopping position of the vehicle. Then, the vehicle is moved until the tire T comes into contact with the tire stop block TS.

[0029] Next, the two tire lashing jigs 10 are fixed to the floor plate. At this time, the lashing belt B is looped around the upper side of the outer circumferential surface of the tire, and the tire lashing jig 10 is fixed in a position where both ends of the lashing belt B are perpendicular to the floor plate 30. To do this, the two tire lashing jigs 10 are placed in fixing holes 31 formed in locations where the lashing jigs can be placed in those positions. The method of fixing the tire lashing jigs 10 to the floor plate is as described above.

[0030] After the tire fastening jig 10 is fixed to the floor board 30, the retaining portion 22 of the jig hook 20 is inserted into one of the hook insertion holes 14 and rotated around an axis along the vertical direction, thereby fixing the jig hook 20 to the tire fastening jig 10. In addition, the jig hook 20 is in a state in which the annular portion BR provided at one end of the lashing belt B is connected to one connecting portion 23, and the lashing belt B is passed between the other connecting portion 23 and the belt fixing portion 21. Then, the end of the lashing belt B that is not connected to the jig hook 20 is connected to a connecting portion provided on the floor board 30 or the like, and the lashing belt B is tightened. In this way, all the tires of the vehicle are fastened and fixed, thereby fixing the vehicle to the floor panel 30.

[0031] <Movement and effect when climbing over> Next, the operation and function of each part when the tire T climbs over the tire securing jig 10 will be described with reference to Fig. 5. In the following description, the case where the vehicle is moved from the floor plate 30 will be described as an example. The initial state is when the tire T is released, the jig hook 20 is removed from the fastening jig, and the tire stop block is removed from the floor board.

[0032] As shown in Fig. 5(a), the tire tying jig 10 is placed in the path of the tire T. This is an unavoidable arrangement in order to fasten the tire T in the above-described manner. Therefore, when the vehicle is moved from the position where the tire T is fastened with the tire fastening jig 10 fixed to the floor plate 30, the vehicle will necessarily move over the tire fastening jig 10. As shown in the figure, the fixing holes 31 are formed in multiple locations so that the fixing position of the tire securing jig 10 on the floor plate 30 can be adjusted. However, since the securing belt B needs to be wound around the outer periphery of the tire T, a part of the tire securing jig 10 will always be positioned on the path of the tire T regardless of which fixing hole 31 is selected.

[0033] 2(a), the position-holding portion 13 is configured so that, when the tire fastening jig 10 is in a fixed state, the entire position-holding portion 13 is located inside the ridge line of the jig main body 11 as viewed in the width direction of the tire T. Naturally, the position-holding portion 13 is located at a height lower than the upper surface 11a, which is the part of the jig main body 11 that is located highest from the floor board.

[0034] With this configuration, when the tire T climbs over the tire securing jig 10, it climbs over only the upper surface 11a of the jig main body 11, as shown in FIG. 5(b). The jig body 11 has a flat upper surface 11a when the jig hook 20 is removed. In addition, the tire securing jig 10 according to this embodiment has a rounded portion between the upper surface 11a and the side surface, which prevents the load from concentrating on only one portion of the tire T during the climbing over process.

[0035] <Effects of the First Embodiment> When climbing over the tire fastening jig 10, the load is prevented from being applied to only a portion of the tire T, so that wear on the tire T can be suppressed when the vehicle is moved with the tire fastening jig 10 fixed to the floor board.

[0036] In addition, the entire position holding portion 13 is configured to be positioned inside the ridge line of the jig main body portion 11 when viewed from the width direction of the tire T, thereby making it possible to avoid contact between the tire T and the position holding portion 13. Therefore, the structure of the position-maintaining portion 13 can be simplified, and the tire securing jig 10 can be easily made lighter and less expensive.

[0037] Since the position holding part 13 is swingably provided on the swing shaft 15 of the jig body 11, the position holding part 13 can be arranged with a simple structure at a height equal to or lower than the upper surface 11a of the jig body 11. Therefore, it is easy to simplify the structure of not only the position holding part 13 but also the support part of the jig body 11 for the position holding part 13.

[0038] Further, a biasing force that can be countered by human power is applied to the position holding portion 13 by a torsion spring 16 . This biasing force makes it easier for the tip of the position-maintaining part 13 to move into the fixing hole 31 simply by moving the jig body 11, and prevents the position-maintaining part 13 from coming off the fixing hole 31 due to vibration. In addition, because this biasing force is strong enough to be resisted by human force, it is also possible to suppress an increase in the amount of effort required when changing the tire securing jig 10 from a fixed state to a releasable state.

[0039] Second Embodiment <Structure of the fastening jig> A fastening jig and a tire fastening device according to a second embodiment will be described with reference to FIGS. As shown in Figure 6(a), the tire binding jig 40 of the second embodiment comprises a jig main body 41, jig fixing portions 42a, 42b, 42c, and 42d (hereinafter, the representative symbol 42 will be used when there is no need to distinguish between them) formed at four locations on the jig main body 41, and a position holding portion 43.

[0040] Specifically, the second embodiment differs from the first embodiment in the structure of the position holders 13 and 43. The jig main body 41 of the second embodiment shown in Fig. 6 is configured by fixing a pair of plate-like members, each having a jig fixing portion 42 formed thereon, with their surfaces facing each other to the underside of a holding plate 44 for holding the position of the jig hook 20. A reinforcing plate 45 is fixed across the jig fixing portions 42, whose surfaces face each other. These portions do not affect the tire T when it climbs over the tire securing jig 40, and therefore their description will be omitted. The differences shown in the other figures are also due to differences in the thickness of the members and the manufacturing method between the first and second embodiments, and are not substantial differences, so their description will be omitted.

[0041] The position-retaining unit 43 according to the second embodiment is configured by two position-retaining plates 48 arranged side by side in the short-side direction of the jig body 41 with their surfaces facing each other, and a handle 49 that is wider than the jig body 41 and is fixed to hang across the tip of the position-retaining plate 48. The handle 49 is formed in an inverted L-shape when viewed from the short-side direction of the jig body 41. Similar to the hook hole 13a in the first embodiment, the handle 49 is provided so that an operator can hook his or her fingers around it to easily operate the position-retaining unit 43. Furthermore, similar to the position holding part 13 of the first embodiment, the position holding part 43 is supported so as to be swingable on a swing axis 46 oriented along the short side direction of the jig main body part 41, and the tip part is biased by a torsion spring 47 so as to swing toward the floorboard.

[0042] As shown in Figure 6(b), when the tire securing jig 40 is in a fixed state, the position retaining plate 48 extends in the width direction of the tire T so that its tip exceeds the fixing hole 31, and is configured so that its entirety is positioned at a height below the highest part of the jig main body 41. As shown in FIG. 7, the lower part of the position-retaining plate 48 is formed with a blocking protrusion 48a that abuts against the wall surface of the fixing hole 31 when the tire fixing jig 40 is in a fixed state and prevents the tire fixing jig 40 from moving. With this structure, when the tire securing jig 40 is in a fixed state, the part of the position holding portion 43 other than the blocking protrusion 48a is positioned on the floor plate 30, and the upper part of the handle portion 49 is approximately flush with the upper surface 44a of the holding plate portion 44.

[0043] <Movement and effect when climbing over> The operation of the tire T when climbing over the tire securing jig 40 according to the second embodiment is also substantially the same as that of the first embodiment. However, when the tire T protrudes from the jig main body 41, as in the tire securing jig 40 on the right side of Figure 7, the tire T also comes into contact with the upper part of the position holding portion 43 and performs the climbing operation.

[0044] <Effects of the second embodiment> When the tire securing jig 40 is in a fixed state, the upper part of the position holding portion 43 is positioned at approximately the same height as the upper surface 44a of the holding plate portion 44, which makes it possible to easily increase the contact area when the tire T passes over it. For example, if the tire T and the tire securing jig 40 are positioned in a positional relationship similar to that of the tire securing jig 40 on the right side of Figure 7, a portion of the tire T will protrude from the jig main body 41 when climbing over it. However, because the protruding tire T touches the position holding portion 43, it is possible to prevent the load from concentrating only on the portion that touches the upper surface 44a. Therefore, when securing vehicles with different vehicle widths or tire T widths, it is not necessary to use tire securing jigs 40 of different sizes, which reduces the equipment costs for businesses and the effort required during work.

[0045] <Modifications that the present invention can adopt> Possible modifications of the present invention will be described below. The shapes and structures that the tire tying jig according to the present invention can take are not limited to those shown in the first and second embodiments. For example, in the embodiments, the position-holding portions 13, 43 are biased by torsion springs in a direction that presses their tip portions against the floor plate 30, but other mechanisms such as a locking mechanism may be used to prevent the tip portions of the position-holding portions 13, 43 from moving above the floor plate 30 when the tire tying jig 10, 40 is fixed to the floor plate.

[0046] Furthermore, the position-holding portion does not necessarily have to be configured to be swingable by a swing shaft supported by the jig main body portion 11, 41. For example, a stop bar or the like that is detachable from the jig main body portion 11, 41 may be used as the position-holding portion. [Explanation of symbols]

[0047] 10, 40... Tire securing jig, 11, 41... Jig main body, 11a, 44a... Upper surface, 12, 42... Jig fixing portion, 13, 43... Position holding portion, 48a... Blocking protrusion, 20... Jig hook, 30... Floor plate, 31... Fixing hole, T... Tire, B... Securing belt, BR... Ring portion

Claims

1. A tire securing jig that constitutes part of a tire securing device for securing a tire to a floor plate using a fastener, and that is secured to the floor plate by inserting its lower part into a fixing hole formed in the floor plate and moving it in a predetermined direction along the width direction of the tire, a main body portion positioned on the floor board when in the fixed state; a position retaining portion that is supported by the main body portion and is disposed inside the fixing hole in the fixed state, thereby preventing movement in a direction opposite to the predetermined direction, A tire securing jig characterized in that the position holding portion is configured so that, at least when in the fixed state, its entirety is positioned at a height lower than the part of the main body that is located highest from the floor plate.

2. The tire securing jig according to claim 1, characterized in that the position maintaining portion is configured so that, at least when in the fixed state, the entire portion is positioned inside the ridge line of the main body portion when viewed in the width direction of the tire.

3. The tire securing jig according to claim 1, characterized in that the base end of the position retaining portion is supported so as to be swingable around an axis that is aligned in the fore-and-aft direction of the tire when in the fixed state and that is positioned entirely above the floor plate when in the fixed state.

4. 4. The tire securing jig according to claim 3, wherein a biasing force that can be manually resisted is applied to the position-retaining portion in a direction that presses the tip portion against the floor plate from above.

5. A tire tying device comprising the tire tying jig according to any one of claims 1 to 4.

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