JP5569926B2 - Shock absorption base plate for snowboard - Google Patents

Description

  The present invention relates to a base plate that is a basic structure constituting a binding used for fixing a boot to a snowboard, and more specifically, when an excessive impact load (large load) is applied to the snowboard. The present invention relates to a shock absorbing base plate for a snowboard that can effectively avoid damage to the snowboard by absorbing the impact energy.

  Furthermore, the present invention is a shock absorption base plate for a snowboard that can effectively avoid damage to the snowboard when an excessive impact load is applied to the snowboard, and prevents a decrease in impact energy absorption performance. The present invention relates to a shock-absorbing base plate for a snowboard that can easily change its strength.

  Conventionally, as a shock absorbing structure between a snowboard and a boot, a buffer material is attached to the upper surface of the base plate (see Patent Document 1), or a buffer material is disposed in a through hole extending from the upper surface to the lower surface of the base plate. And a structure that absorbs the shock between the base plate and the snowboard by arranging a cushioning material on the lower surface of the base plate (see Patent Document 3). Yes.

  However, this conventional shock absorbing structure is used to absorb vibrations and relatively light impact energy in order to improve the snowboard's control performance (responsiveness) and riding performance such as ride comfort. The main cushioning material used is elastomer resin or rubber with high elasticity, and the load that can be handled is the static load applied from above by the weight of the snowboarder on the snowboard placed along the horizontal running surface. It is the center.

  Therefore, the conventional shock absorbing structure repeats harsh use such as jumping high by an advanced person, and in the case of landing to fall diagonally on a hard frozen running surface (see FIG. 8), the snowboard is instantaneously moved. It is not possible to cope with a large impact load applied to the snowboard from the base plate's buttocks so that it is bent strongly, and by repeatedly receiving such a large impact load, the snowboard near the base plate's buttocks cracks and breaks (Damage occurred mainly at positions A and B in FIG. 9).

  Therefore, measures to increase the strength of the snowboard itself are also considered in order to avoid the damage of the snowboard due to the large impact load as described above, but the large impact load that occurs only instantaneously when used severely. Increasing the strength of the snowboard so that it can withstand receiving has the problem of reducing the snowboard's sliding performance.

  It is also conceivable to use a material having a relatively low hardness that can absorb a large impact that may lead to damage to the snowboard as the material of the base plate. However, the base plate used to secure the boot to the snowboard is made of metal or metal so that it can withstand the heavy loads received from the boot and the snowboard during the run and can reliably transfer the energy received from the boot to the snowboard. It is necessary to compose from a high-strength material such as glass fiber reinforced resin. Therefore, no suitable material or structure has been proposed that can avoid the breakage of the snowboard while maintaining the strength and performance required for the base plate.

  As described above, depending on the conventional shock absorption method, 1) to absorb vibrations and relatively light shocks in order to improve the sliding performance such as the controllability and riding comfort of the snowboard, and 2) a large amount applied from the base plate It is not possible to satisfy all of the following: avoiding damage to the snowboard due to impact load, and 3) not changing the strength of the snowboard or base plate or changing the material that would cause the sliding performance to deteriorate. No effective measures against snowboard breakage have been realized by prioritizing performance.

JP-T-2006-513000 US Patent No. 5,990,984 JP 2002-85622 A

  Accordingly, the problem to be solved by the present invention is that a snowboard that causes a decrease in the snowboard's sliding performance when trying to prevent the snowboard from being damaged by a large impact load applied from the base plate of the snowboard baseplate of the conventional structure. Alternatively, it is necessary to change the strength of the base plate or the material, and an object of the present invention is to provide a shock absorbing base plate for snowboard that solves these problems.

  Furthermore, an object of the present invention is to provide a shock absorbing base plate for a snowboard that solves the above-mentioned problems, and prevents a decrease in impact energy absorbing performance, and can easily change the strength of the base plate. There is to do.

According to the present invention, a slit is formed between the lower surface portion corresponding to the snowboard side and the upper surface portion corresponding to the boot side at the edge of the heel portion of the base plate . The most important feature is the shock-absorbing base plate for snowboards, characterized by the fact that the plate spring effect obtained by setting the thickness to about 15 mm can absorb excessive impact energy and avoid damage to the snowboard. It is.

  In the shock absorbing base plate for a snowboard of the present invention, the slit may be formed from both sides of the rear end portion of the base plate to the side surface of the base plate except for the toe portion of the base plate.

  In the shock absorbing base plate for snowboard of the present invention, a filler may be disposed in the slit.

  Furthermore, in the shock absorbing base plate for a snowboard of the present invention, the lower surface portion or the upper surface portion may be formed in an oblique shape so that an outer edge thereof gradually widens the opening end of the slit.

  The shock-absorbing base plate for snowboards of the present invention bends the snowboard instantaneously and strongly, for example, when it is landed so as to fall obliquely on a hard and frozen running surface after repeated severe use such that a senior jumps high. In this way, when a large impact load is applied to the base plate flange, the impact energy due to the impact load is absorbed by the leaf spring effect of the flange edge obtained by forming a slit in the base plate edge. . Therefore, this invention can provide the shock-absorbing base plate for snowboard which can avoid damage to a snowboard.

  According to the shock absorbing base plate for snowboard of the present invention, by using a conventional cushioning material together, 1) absorbing vibration and relatively light shock in order to improve the sliding performance such as controllability and riding comfort of the snowboard, 2) To avoid damage to the snowboard due to a large impact load applied from the butt of the base plate, and 3) Do not change the strength of the snowboard or the base plate or change the material so as to reduce the sliding performance. Can be satisfied.

  Furthermore, in the shock absorbing base plate for a snowboard according to the present invention, the slit is formed from both sides of the rear end of the base plate to the side of the base plate except for the toe portion of the base plate. ) Can be avoided in a wide range of snowboards.

  The shock absorbing base plate for snowboards of the present invention has a filler disposed in the slit to prevent a decrease in shock absorbing performance due to foreign particles such as sand particles and dust entering the slit, and the strength of the base plate (and hence the impact). The energy absorption performance) can be changed as appropriate.

  Furthermore, in the shock absorbing base plate for a snowboard according to the present invention, the shape of the outer edge of the lower surface portion or the upper surface portion of the collar end edge is formed in an oblique shape so as to gradually widen the opening end of the slit. Further, it becomes possible to relieve the shear stress generated between the edge of the buttock of the base plate and the snowboard, and the breakage of the snowboard can be more effectively avoided.

FIG. 1 is a perspective view showing an impact absorbing base plate for a snowboard embodying the present invention. FIG. 2 is a side view showing a state where a snowboard shock absorbing base plate embodying the present invention is mounted on a snowboard. FIG. 3 is a horizontal sectional view of the rear end edge of the buttocks showing the inside of the slit of the shock absorbing base plate for snowboard embodying the present invention. FIG. 4 is an enlarged side view showing a slit of a shock absorbing base plate for a snowboard embodying the present invention. FIG. 5 is an enlarged side view showing a slit of a shock absorbing base plate for a snowboard embodying the present invention without arranging a filler in the slit. FIG. 6 is a graph showing the amount of displacement (the stroke of the actuator of the compression tester) of the upper surface of the base plate when a load is applied to the flange edge of the base plate from above. FIG. 7 is a plan view of a shock absorbing base plate for a snowboard showing a portion where a slit may be formed when the present invention is embodied. FIG. 8 is a perspective view showing a state in which an advanced player jumps high and falls to a hard and frozen running surface that has conventionally caused damage to the snowboard. FIG. 9 is a plan view showing a main breakage site of a snowboard that has occurred by using a conventional base plate.

The present invention forms a slit between the lower surface portion corresponding to the snowboard side and the upper surface portion corresponding to the boot side at the periphery of the base plate, particularly at the edge of the heel portion, and the depth of the slit in the substantially horizontal direction. The structure of the base plate so that the snowboard can be bent strongly and momentarily by absorbing the impact energy and avoiding damage to the snowboard by the leaf spring effect obtained by setting the dimensions to about 4 to 15 mm. A shock-absorbing base plate for snowboards has been realized that can absorb the impact energy due to the large impact load applied to the snowboard from the section, and can effectively avoid damage to the snowboard.

  The slit may be formed from both sides of the rear end of the base plate to the side surface of the base plate except for the toe portion of the base plate, and according to such an embodiment, the snowboard can be prevented from being damaged in a wide range. .

  Further, according to the embodiment in which the filler is disposed in the slit, it is possible to prevent foreign matters such as sand particles and dust from entering the slit, and it is possible to prevent the impact energy absorption performance from being deteriorated by the base plate, and the base plate The strength can be changed easily and quickly as appropriate.

  According to the embodiment in which the shape of the outer edge of the lower surface portion or the upper surface portion of the base plate is formed in an oblique shape so as to gradually widen the opening end of the slit, the shock absorbing performance by the base plate is further improved. be able to.

  FIG. 1 is a perspective view showing an embodiment of a shock absorbing base plate 1 for a snowboard that embodies the present invention. The base plate 1 is a basic that constitutes a binding used for fixing a boot 20 to a snow board 10. It is a structure, and is firmly screwed to the snowboard 10 using a disk plate (not shown) that covers the circular opening 2 provided in the substantially central portion.

  Reference numeral 3 denotes a toe portion of the base plate 1 formed in front of the opening 2, which is a portion corresponding to the toe 21 of the boot 20 (see FIG. 2), and forms bindings at both side end portions thereof. A toe side mounting portion 4 is fixed to fix the toe strap so that the position of the toe strap can be adjusted.

  Reference numeral 5 denotes a flange portion of the base plate 1 formed at the rear of the opening 2, which is a portion to which the flange 22 of the boot 20 corresponds (see FIG. 2). A heel side attachment portion 6 is erected to fix the ankle strap and the high back (not shown) so that the position can be adjusted.

  The base plate 1 is made of glass fiber so that it can withstand a large load received from the boot 20, both the straps, the highback and the snowboard 10 during sliding, and correctly transmit the energy received from the boot 20 to the snowboard. It is integrally molded from a high-strength nylon resin containing about 30%.

  Reference numeral 7 denotes a slit formed between the lower surface portion 5a corresponding to the snowboard 10 side and the upper surface portion 5b corresponding to the boot 20 side at the edge of the flange portion 5 of the base plate 1. The leaf spring effect obtained at the edge of the flange portion 5 is provided, that is, the upper surface portion 5b of the base plate 1 is mainly elastically deformed to absorb impact energy due to a large impact load and damage the snowboard 10. You can avoid it.

  The slit 7 of the present embodiment is formed in a substantially horizontal direction from the rear end edge of the flange portion 5 of the base plate 1 to a position extending 5 to 10 mm inside (the vertical dimension in FIG. 3, that is, the depth dimension). ), Such a depth dimension suitable for exhibiting the effects of the present invention should be changed according to the material of the rear edge of the flange portion of the base plate 1 and the thickness of the lower surface portion 5a and the upper surface portion 5b. However, it is about 4 to 15 mm.

  Furthermore, since the vertical dimension of the slit 7, that is, the size of the gap of the slit 7 is preferably about 2 to 3 mm, it is formed to be about 2.5 mm in this embodiment. Since the thickness of the lower surface portion 5a and the upper surface portion 5b at the rear end edge of the flange portion 5 of the base plate 1 constituting the upper and lower portions of the slit 7 is preferably about 3 to 5 mm, in this embodiment, about 5 mm each. And about 3 mm.

That is, in the base plate 1 of the present embodiment, the thickness of the upper surface portion 5b is set to be thinner than the lower surface portion 5a of the portion corresponding to the slit 7 of the base plate 1, and the boot 20 is more flexible than the flexibility of the collar portion 5 on the snowboard 10 side. The flexibility of the side collar 5 is enhanced.
The thickness of the lower surface portion 5a and the upper surface portion 5b can be changed as appropriate. For example, the thickness of the both is about 4 mm, and the flexibility of the flange portion 5 on the snowboard 10 side corresponding to the slit 7 of the base plate 1 and the boot 20 You may make the flexibility of the side collar part 5 equal.

  In this embodiment, as shown in FIGS. 1 to 3, the slit 7 is formed independently at two positions on the left and right sides of the base plate 1 excluding the rear end central portion of the base plate 1. In each of the projections 7a, a flexible filler 8 made of a thermoplastic elastomer resin (TPU: thermoplastic polyurethane, EVA: ethylene / vinyl acetate copolymer, etc.) or rubber having a high elasticity is formed in the slit 7; It is fitted so as to be in a retaining state by engaging.

  In the present embodiment, the reason why the slit 7 is not formed in the central part of the rear edge of the buttock edge of the base plate 1 is that the snowboard 10 is broken as shown in FIG. This is because the load concentration at the corner portion of the flange portion 5 of the base plate 1 can be particularly alleviated because it is often seen on the left and right side portions.

  However, the slit 7 may be provided also in the rear end central portion of the flange edge of the base plate 1, and in this case, the thickness of the lower surface portion 5 a or the upper surface portion 5 b is increased so that the size of the gap of the slit 7 is increased. You may implement so that it may become small gradually in the rear-end center part of an edge.

  In the case where the size of the gap of the slit 7 is gradually reduced at the rear center of the heel edge, the lower surface 5a or the upper surface 5b at the heel rear edge of the snowboard 1 is slit. 7, the range in which elastic deformation can be performed is gradually reduced. Therefore, at the rear end edge of the base portion of the base plate 1, it is possible to obtain a characteristic that the impact energy absorption performance gradually increases from the central portion to both side portions. .

In the rear end edge of the flange portion 5 of the base plate 1 of this embodiment, the lower surface portion 5a and the upper surface portion 5b are formed in an oblique shape so that the outer edge 7b gradually widens the opening end of the slit 7. Has been.
Therefore, the shape of the outer edge 7b can relieve the shear stress generated between the edge of the base plate 1 and the snowboard 10, and the damage to the snowboard 10 can be more effectively avoided.

  In the base plate 1 of this embodiment, as shown in FIGS. 2 and 4, when the base plate 1 is fixed on the snowboard 10, the base plate 1 and the snowboard 10 exclude the lower surface portion of the periphery of the opening 2 of the base plate 1. A gap of about 1 to 2 mm is generated, and a flexible cushioning material 9 made of the same material as the filler 8 is arranged in the gap, and the sliding performance such as controllability and riding comfort of the snowboard 10 is provided. In order to improve it, vibrations and relatively light impacts are absorbed (a conventionally known shock absorbing structure).

When the shock absorbing performance by the base plate 1 (with the filler 8 removed) and the buffer material 9 configured as described above and the shock absorbing material 9 was tested with a compression tester having an actuator with a diameter of 20 mm from above as shown in FIG. The result is as shown in FIG. 6, and by providing the slit 7 of the present invention, it is possible to greatly absorb impact energy due to a test force of about 1000 N to 3000 N (corresponding to an impact load of about 100 kg to 300 kg during sliding). confirmed.
That is, when a test force of 3000 N is applied from above to the base plate 1 provided with the slits 7 of the present invention, energy of about 4.5 J can be absorbed by the leaf spring effect of the edge of the buttock.

  The above shock load is a highly elastic cushioning material that is used to absorb vibrations and relatively light shocks to improve the sliding performance such as snowboard control and ride comfort by the conventional shock absorbing structure. Greatly exceeds the load of about 60 to 70 kg, which is a load that can be applied from above (by the weight of the snowboarder on the snowboard placed along the horizontal running surface).

On the other hand, a base plate without slits shown as a comparative example in FIG. 6 (the same cushioning material as the cushioning material 9 of this embodiment is disposed under the conventional base plate made of the same material as the base plate 1 of this embodiment). The thickness of the edge of the buttocks was 9 mm, and when a test force of 3000 N was applied to the buttocks from above, only about 2.1 J of energy could be absorbed by the base plate.
Therefore, it has been confirmed that in the base plate having the conventional structure (without the slit), the impact energy due to the excessive impact load cannot be sufficiently absorbed, and damage to the snowboard 10 cannot be avoided.

  Furthermore, as a result of a sliding test in a severe usage mode, the snowboard breakage that occurred in continuous use for about 2 weeks in the base plate of the conventional structure is 4 weeks when the base plate 1 embodying the present invention is used. Even during continuous use, the snowboard was not damaged.

  Therefore, by arranging the cushioning material 9 conventionally used between the snowboard shock absorbing base plate 1 of the present embodiment and the snowboard 10, vibration or vibration is improved in order to improve the sliding performance such as controllability and riding comfort of the snowboard. In the case of absorbing a relatively light impact and repeating severe use such as jumping high by an advanced person, when landing on a hard frozen running surface diagonally (see Fig. 8), instantly snowboard Therefore, it is possible to cope with a large impact load applied to the snowboard from the base plate ridge so as to be bent strongly.

  That is, the shock absorbing base plate 1 for snowboard of the first embodiment does not deteriorate the sliding performance due to the provision of the slit 7, and the slit 7 is used as the base plate 1 even if severe use is repeated by advanced users. Due to the leaf spring effect obtained by providing it at the edge of the buttocks, excessive impact energy can be absorbed and damage to the snowboard 10 can be effectively avoided.

  In the first embodiment, the filler 8 is disposed in the slit 7. However, the edge of the flange 5 of the base plate 1 can be reduced by omitting the filler 8 or changing the elasticity of the filler 8. The impact energy absorption effect by the slit 7 can be changed easily and quickly as appropriate, and the situation of the running surface and the running style can be handled without replacing the base plate 1.

  Further, in the embodiment, the slits 7 are independently provided at two right and left portions of the base plate 1 except for the rear end central portion of the base plate 1 so as to correspond to a place where the snowboard 10 is frequently damaged. However, as shown in FIG. 7, the slits 7 may be formed from both sides of the rear end portion of the base plate to the side surfaces of the base plate except for the toe portion 3 of the base plate 1.

That is, the slits 7 may be provided at appropriate positions in the hatched portion S in FIG. 7, and the slits 7 do not necessarily have to be provided at symmetrical positions.
Therefore, according to the damage situation of the snowboard due to the use of the conventional base plate, for example, the slit provided in the left rear portion for providing the slit 7 of the right rear portion (position near the rear end of the snowboard during sliding) of the buttock edge It may be carried out by making it larger than 7, or increasing the gap, width and depth of the slit 7.

  The reason for excluding the toe portion 3 of the base plate 1 as a position where the slit 7 is formed is that the toe portion 3 has an excessive impact load that causes damage to the snowboard 10 even under severe use conditions where an advanced person jumps high. Because is not added. However, it is possible to provide a slit in the toe portion 3 as a design reason or a method of reducing the weight.

The present invention is not limited to the above embodiment, and the material, dimensions, strength, etc. of the snowboard shock absorbing base plate 10 can be changed as appropriate without departing from the spirit of the present invention, and the shape, position, You may carry out by changing suitably a magnitude | size, a number, etc.
For example, the distance may be reduced as the depth of the slit 7 decreases and the distance increases toward the opening end, or the clearance may increase toward the opening end and decrease toward the opening end.

  Furthermore, the lower surface portion 5a or the upper surface portion 5b of the base plate 1 constituting the slit 7 is constituted by another member without integrally forming the flange edge of the base plate 1, and the base plate 1 is bonded or assembled to the base plate 1. Thus, the slit of the present invention may be embodied. In this case, although the manufacturing process of the base plate 1 is complicated, variations in which the shock absorbing performance can be controlled can be increased, and expression forms on the external design can be diversified.

  The present invention can be suitably used in the manufacture of a shock absorbing base plate for a snowboard.

DESCRIPTION OF SYMBOLS 1 Base plate 2 Opening part 3 Toe part 4 Toe side attaching part 5 Toe part 5a Lower surface part 5b Upper surface part 6 Toe side attaching part 7 Slit 7a Protrusion 7b Outer edge 8 Filling material 9 Buffer material 10 Snowboard 20 Boot 21 Toe 22 Toe 22 , B Snowboard position corresponding to the base plate vicinity

Claims (4)

At the edge of the buttock of the base plate,
A shock absorbing base plate for a snowboard in which a slit is formed between a lower surface portion corresponding to the snowboard side and an upper surface portion corresponding to the boot side ,
For a snowboard characterized by absorbing the impact energy and avoiding damage to the snowboard by the leaf spring effect obtained by setting the depth of the slit in the substantially horizontal direction to about 4 to 15 mm . Shock absorbing base plate.   2. The shock absorbing base plate for a snowboard according to claim 1, wherein the slit is formed from both sides of a rear end portion of the base plate to a side surface of the base plate except for a toe portion of the base plate.   The shock absorbing base plate for a snowboard according to claim 1 or 2, wherein a filler is disposed in the slit.   4. The lower surface portion or the upper surface portion is formed in an oblique shape so that an outer edge thereof gradually widens the opening end of the slit. Shock-absorbing base plate for snowboards as described in.

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