CN102271769A

CN102271769A - Sporting device made of thermally modified wood

Info

Publication number: CN102271769A
Application number: CN2010800042343A
Authority: CN
Inventors: 迈克尔·谢奈德
Original assignee: TT TUNING CT GmbH
Current assignee: TT TUNING CT GmbH
Priority date: 2009-01-08
Filing date: 2010-01-07
Publication date: 2011-12-07
Also published as: DE102009042695A1; WO2010079191A1; DE202009000321U1; JP2012514508A; KR20110110148A

Abstract

The invention relates to a sporting device (1), in particular a table tennis racket or a golf club, comprising a handle area and an impact area (100) connected to the handle area (200), wherein the impact area (100) is composed at least partially of wood that has been thermally modified.

Description

Sports apparatus by the wooden one-tenth of heat modification

Technical field

The present invention relates to a kind of sports apparatus as described in the preamble according to claim 1.

Background technology

Many have handle area and connect handle area impact or the sports apparatus of impingement region in, particularly in table tennis or the golf, the pith of hitting region is made by wood.This part ascribe the standard schedule of Physical Culture and Sports Association to, but prior reason is wooden inherent characteristic, particularly weight, surface quality, elasticity and intensity.

The sensation of sports apparatus in its probable life determined by the material of its use to a great extent, particularly by the material decision that is used to design hitting region.This is applied to wood especially, the result, and the trial of wood of irrespectively replacing the hitting region of sports apparatus with standard schedule before is accepted hardly.

In addition, sports apparatus cooperates with user's preference and demand usually, and therefore, the independent adjustment of sports apparatus can improve the sensation of specific user to sports apparatus in its probable life.But wood is easy to generate the limitation that the material of the weight that for example relates to design and intensity causes.In addition, wooden natural characteristic means the robustness that is difficult to reach hitting region during the design, and its robustness is also relevant with resistance to weathering (weather-resistance), if particularly this motion is the situation of preferably carrying out out of doors.In addition, wooden as a kind of natural material, it also needs to keep special boundary condition in process, particularly relate to temperature and humidity.In addition, use senior wooden formation one cost factor of can not ignore that for example is called the tropical wood form.

Summary of the invention

Therefore, a target of the present invention is to improve the sports apparatus according to the preamble of claim 1, gives its firm design, so that it can be produced in low-cost and simple mode.

This purpose realizes by the feature of claim 1.Its favourable improvement has formed the theme of dependent claims.

According to the present invention, sports apparatus particularly is designed to table tennis bat or golf club, the hitting region that has handle area and be connected to handle area.Hitting region is at least in part by being constituted by thermally-denatured wood.

Heat modification is generally considered to be for good and all and changes wooden characteristic, mainly is under the anoxic environment and does not add the chemicals quality and realize by wood is placed in temperature increase.In addition, the change of material behavior is determined by the selection of temperature range fatefully.Here, temperature surpasses 140 ° usually, because from this temperature range, hemicellulose begins degraded.Yet 170 °-230 ° is thermally-denatured preferred range.In addition, the wood according to above-described boundary condition modification is commonly referred to carbonized wood (Thermowood).

The material behavior of this wood is changed by this way: compare with the wood of untreated same type, its bending strength has increased 45%, weight saving simultaneously 10%.In addition, improved the ability of opposing ambient influnence, this allows favourable processing and uses this wood.Especially, the expansion of heat modification wood and the scope of contraction are littler, and its equilibrium humidity value has reduced by 70%.Its processing procedure is favourable equally, because reduced wooden internal stress in heat treatment process, and has realized good dimensional stability,

Therefore, use makes and can compare higher robustness with acquisition with the design of being made by conventional wood, and reduce production costs according to the sensation of independent demand adjustment sports apparatus in the service life of sports apparatus according to heat modification wood of the present invention.

In a favourable improvement, heat modification wood is arranged on the exterior visual border surface of hitting region.This has produced the stable especially and firm outer surface of size, and has improved dimensional stability especially.In addition, carbonized wood can also be expanded to use in handle area, thus therefore, this be not unessential mode influence the zone of operation also can be from benefiting from the dimensional stability of heat modification wood.

In addition, sports apparatus preferably has weather proof structure (weatherproof configuration).The above-mentioned basic weather proof of carbonized wood provides cost low selection by the moisture absorption that reduces and low-level expansion and contraction, it has low design cost, thereby has the measure that changes the sports apparatus sensation hardly, to be used to provide the weather proof of sports apparatus.

In an improvement, sports apparatus can have the nucleus that is wrapped up by plastic sheeting fully.In the space at least two orthogonal directions, the ratio of the thickness of this film and the thickness of nucleus was less than 1: 9.On the one hand, this makes it may provide and improve weather proof.But simultaneously, this also may produce the special surface quality of durability connection of other elements that for example are used for hitting region.Because properties of materials, with heat modification wood relatively, especially simply and advantageously obtain this shell.In addition, the characteristic changing of the hitting region of the sports apparatus that is caused by this shell is discovered hardly.But further improvement also is thinkable.

Especially, can provide a series of further measure to adjust the characteristic of hitting region.For example, hitting region can be made of conventional wood at least in part.In addition, do not get rid of according to an embodiment of this aspect conventional wooden use is extended to handle area, this may cause the improvement of distribution of weight under some environment.

In an improvement, hitting region comprises a plurality of layers.Can expect that similarly this is equally applicable to handle area.When using this sports apparatus square stance, two kinds of schemes all can improve the adjustment and the harmony of the damping performance of sports apparatus, in addition, this designs simplification the special change of characteristic of hitting region.

Select in order to produce further special adjustment, and further reduce the relevant adjustment expense of design, in this case, the border surface of layer can be in the space along at least one direction with parallel plane mode orientation.The plane parallel orientation of layer is preferably perpendicular to the preferred bounce-back direction of hitting region.

Under the situation of layer structure, specific coordination measure has been proved to be simple especially, and an example of this measure is a rebounding characteristic of selecting to adjust hitting region by the material of layer system.Especially, can expect providing the material of the elasticity of flexure here with varying level.In addition, for example, also can expect selecting to adjust the weight of layer system by material.

In a favourable improvement, hitting region comprises at least three layers.For example, it can comprise carrier layer, and carrier layer is than other bed thickness and mainly determined the weight and the intensity of this design.In addition, advantageously at least two other layers combine with this carrier layer, selecting specifically to adjust damping performance by material.

In addition, hitting region can have composite layer, and these composites are because its tensile strength and low weight and well-known especially.Particularly carbon, aramid fiber or glass fibre, but for example the metal material of titanium also is proved to be suitable.Composite allows harder design under the situation that keeps the identical overall weight of cardinal principle, therefore obviously help the independent adjustment of the rebounding characteristic of sports apparatus.Especially, the use of these materials is not limited to hitting region.For example, can expect it also being that the grip areas of non-stratiform form also adopts these materials.

Another aspect of the present invention has illustrated a kind of method that alleviates the weight of sports apparatus, and this sports apparatus has handle area and has the hitting region of the handle area of being connected to, and wherein this sports apparatus is made of wood at least in part.

This is limited by the method according to claim 12 on the one hand, make that constituting the zone, ground by wood is substantially replaced by the part by the wooden one-tenth of heat modification with identical or lower level elasticity of flexure, thereby in remarkable weight reduction, cause the design of identical or higher bending strength.

In addition, conception institute of the present invention based on another purpose be to illustrate a kind of method that improves the bending strength of sports apparatus, this sports apparatus has handle area and is connected to the hitting region of handle area, this sports apparatus is made of wood at least in part.

According to the present invention, this realizes by the method according to claim 13, and the zone that is made of wood substantially of sports apparatus is replaced by the part by the wooden one-tenth of heat modification of same type.

Another object of the present invention is to provide a kind of method, its material of advantageously guaranteeing hitting region connects in durable mode, thus the influence of their opposing environment.

This realizes by claim 14 of the present invention.Favourable improvement has formed the theme of dependent claims.

A kind of method of making sports apparatus, this sports apparatus has handle area and has the hitting region of the handle area of being connected to, at hitting region is that layer structure and hitting region use under the situation of heat modification wood to small part, described layer connects by heat lamination at least in part, that is to say that temperature is higher than 100 ℃ sometimes.

This method can produce resistance, durable and weather-proof especially connection between the layer of sports apparatus, wherein, this method removed possible heating steps by use in addition or reduce possible heating steps duration carbonized wood and simplified significantly.

A kind of favourable improvement is that the uppermost cover layer of hitting region is stacked by heat lamination.Especially, this has produced durable connection, with the requirement of the resistance to weathering that can satisfy reinforcement.

Description of drawings

Explain the present invention in more detail hereinafter with reference to accompanying drawing, wherein:

Fig. 1 shows the exemplary embodiment according to sports apparatus of the present invention of table tennis bat or golf club form,

Fig. 2 schematically shows a kind of possible layer structure of hitting region,

Fig. 3 shows the another kind of exemplary embodiment of hitting region,

Fig. 4 shows another distortion of hitting region.

Fig. 5 shows the schematic structure of table tennis bat.

Fig. 6 shows another exemplary embodiment of layer structure of the hitting region of table tennis bat.

The specific embodiment

Fig. 1 show table tennis bat for example or golf club form according to sports apparatus 1 of the present invention.The hitting region 100 that it has handle area 200 and is connected to handle area.According to the present invention, hitting region 100 uses heat modification wood to constitute at least in part.For instance, Fig. 5 shows the structure of table tennis bat, and its handle area 200 has two handle casings 201,202, and its hitting region 100 is the form with base plate of handle transitional region 220,230.This base plate is the part of handle area 200 equally.

According to the present invention, the above-mentioned characteristic of carbonized wood has improved the advantage aspect use, design and production of sports apparatus 1.

Particularly, compare with conventional wood, it can realize harder design in weight saving, and this also causes advantage relevant with cost in the production process usually.This particularly for the acceleration of attainable hitting region 100 and impacted or the acceleration of the object that clashes between recently say so important.The variation of sports apparatus sensation is limited by the target modification mode substantially, should be emphasized that especially, if use by heat modification wood, the noise that impacts generation remains basic identical.

In a favourable design, heat modification wood is provided on the exterior visual border surface of hitting region.In the scheme of table tennis bat, particularly advantageously comprise the zone that covers by the rubber-like coating that produces foam on it usually.It is highly stable that such outer surface is proved to be size, and with regard to the internal structure of hitting region 100, this has provided certain design freedom.In addition, the low absorption of low-level expansion and contraction and equilibrium humidity causes the characteristic of hitting region 100 to keep constant under all environmental conditions, so operating characteristic changes hardly.Especially, this also acts on the time corresponding cycle in service life approximate and sports apparatus 1, because yielding composition and resin are removed in the heat modification process of wood substantially.The fire resistance characteristic of the equilibrium moisture content form of heat modification wood is reduced to 70%, and resistance to weathering is brought up to sizable degree.Therefore, carbonized wood is arranged on the outer surface of hitting region 100 the weather buffer is provided, also improved basic resistance to weathering.

In addition, can provide a favourable structure, be used for weather proof (weatherproofing) is extended to as a whole sports apparatus.Especially, heat modification wood also can be used in the handle area 200.

In addition, mean can be owing to rotting to produce the new zone for the weather sensitivity for whole weather-proof structures.On the whole, this helps this sports apparatus to have long service life.

The weather proof structure of use heat modification wood is not got rid of the other method of use and is obtained weather proof.Yet carbonized wood has been exempted the use of secondary anticorrisive agent in wooden zone to greatest extent.Especially, heat modification wood can be arranged on the center of nucleus or hitting region 100, preferably, as mentioned above, hitting region 100 also is wrapped in the carbonized wood.The antifungal activity of heat modification wood makes does not need to inject fungicide.In addition, weathering resistance coating can be coated in the zone of heat modification wood for example.The basic weather proof of heat modification wood means that coating layer thickness is compared with conventional structure can be quite thin.Therefore, the change in the distribution of the negative characteristic of this protective coating, for example hardness and weight is avoided considerably, thereby its operating characteristic is improved.

In addition, use heat modification wood has reduced the dependence to weatherproof additional measure.Particularly under the situation of the less relatively mechanical damage in the zone of for example protective coating, still guaranteed weather proof.Be used to realize that the additive of weather proof has certain volatility usually, it has tangible infringement to environment on the one hand, and the durability to sports apparatus 1 also has harm on the other hand.On the outer surface of for example sports apparatus 1, use heat modification wood, it adheres to bonding and coating material with weather-proof, under the identical situation of other weathering resistance measure, the endurance quality that improves is provided, it need not repaired under damage particularly less relatively under any degree.Therefore, in addition employed adheres to bonding and coating material also is the weather proof structure.

As the exemplary embodiment that Fig. 4 provided, further can realize resistance to weathering by film 115, film 115 is for example made by PU (polyurethane), PVC (polyvinyl chloride) or PE (polyethylene), and it wraps up the zone of hitting region 100 fully.

With respect to the thickness in the zone that is wrapped, the thickness of film 115 can be ignored here.Preferably, between 1 μ m and 1mm, particularly preferably between 20 μ m to 500 μ m.This has formed weather-proof core, and the outside of core preferably is stacked with heat modification wood 141,142, and therefore, it has formed the complete weather-proof enclosure of hitting region.Here, because in the space at least two orthogonal directions, the ratio of the thickness of this film and the thickness of core 150 is less than 1: 9, so the change of the operating characteristic that the film 115 very thin with respect to core 150 caused almost can not be discovered.In addition, these characteristics can be adjusted by the structure of core 150.The result is, it has extraordinary weather proof, and impacts characteristic and conventional design much at one.

In addition, this film can be used to form the long-lived coating of hitting region 100, thereby can be formed for further adjusting separately the fastening substrate of hitting region 100.In the situation of as shown in Figure 1 table tennis bat, film is used in particular for the fastening substrate of foamed material.

Can expect that preferably as the adjustment measure of hitting region 100, hitting region 100 comprises conventional wooden at least in part.Especially, heat modification wood has the material behavior that changes considerably, therefore, and with the diversity that has also improved material behavior significantly that combines of conventional wood.Thereby guaranteed accurate adjustment.Specifically, this makes can regulate the bounce-back feature, and distribution of weight.Therefore, be not limited only to hitting region, conventional wood also can recommend to be used for for example handle area.

As shown in Fig. 4 and Fig. 6, the exemplary embodiment shown in Fig. 2 provides the hitting region 100 that is formed by a plurality of layers of 110-114 as.Limit a preferred orientations and be proved to be favourable, power is directed away from along this preferred orientations by layer system.Especially, show the layer structure that limits two

preferred orientations

131 and 132 among Fig. 2 again, it shows along the power of different directions deflection.Especially, the deflection of power is limited by the elasticity of flexure of layer material, and therefore, in these layers one uses the heat modification wood can be so that for example the deflection of power is optionally adjusted, and has preferably improved along the power that is impacted the direction of object.In the situation of table tennis bat shown in Figure 6, corresponding layer is preferably outer 112 and 114.

Particularly advantageous is that if the border surface of layer 112-114 has the plane parallel orientation along at least one direction in the space 120, wherein, the direction of plane parallel orientation 120 is perpendicular to the preferred bounce-back direction 130 of hitting region 100.With because the power of the guiding of handle area 200 and the fastening hitting region that causes 100 absorbs compares, extremely important towards mode away from the power of the object that is impacted or clash into.Down auxiliary at the thickness of layer, directed the making of plane parallel can produce differently curved flexible zone, because combining, the natural frequency scope of the change of system as a whole, these zones promoted the elasticity of flexure and the surrender power (bending dynamics) that changes.Therefore, can adjust along the rebounding characteristic of preferred bounce-back direction by the layer thickness that changes heat modification wood.

In a favourable improvement, the rebounding characteristic of layer system 110-114 is by adjusting for the selected material of this system.Especially, under the situation that limits layer thickness, use the heat modification akebi often to cause being called other lifting of resilience level.

In the situation of table tennis bat shown in Figure 1, for example wood can be replaced with the heat modification wood of same type.The lifting that this causes impacting power impacts the resilience rank that power can strengthen and measures.For example the wood with relatively low relative density of Ba Sha wood (balsa) has the significant elasticity of flexure usually.But be not clearly usually for the heat modification wood of same type, the object that therefore uses heat modification wood to replace lightweight wood to mean to be clashed into or impact obtains momentum better, and this causes stronger, stronger impacting continuously.Therefore can replace wood with the heat modification wood of same type, conversely, because will alleviate 10% weight in the heat modification process, this also causes alleviating of weight.This can be used for for example selecting to adjust rebounding characteristic by suitable material.

In addition, can also be 600-1200kg/m for example with bulk density ³The wood of high relative density, for example for example use oak, chicken wings log (wenge), Brazilian rosewood or according to strange log (ekki), replacing with bulk density is 100-500kg/m ³Light-dutyer heat modification wood, for example Ba Sha wood, A Yousi (ayous) or fir.Therefore, the use of heat modification wood causes the design of weight reduction.The elasticity of flexure of heat modification wood is comparable to the wood of the type with quite high relative density.Therefore can be for example when keeping approximately identical design and changing characteristic never in any form, with the wooden heavier wood relatively that replaces of the heat modification of more lightweight with identical or higher bending strength.This can be used for for example selecting to adjust distribution of weight by suitable material.

These measures can so that the weight of table tennis bat under the situation of hardwood, the scope from common 90-140g is reduced to 70-110g under the situation of cork, is reduced to the scope of 45-75g from common 60-85g.

Above-described selection is to be applied to as shown in Figure 1 golf club with the similar mode of table tennis bat.Yet, should be noted in the discussion above that the interest emphasis that improves golf club does not lie in weight reduction.Instead be to make with heat treatment timber construction hitting region 100 can be for example to change the centers of gravity of mallet by other weight is installed.This can enlarge optimum bounce-back surface area under many circumstances, and this can help the improved or easier control that impacts.This also can expect under the situation of table tennis bat in a similar fashion.

In a further exemplary embodiment, layer system 110-114 as shown in Figure 3 comprises at least three layers.Especially, it advantageously limits carrier layer 110.Be typically designed to the weight that the carrier layer thicker than other layers 111-114 defines hitting region (100) basically.In table tennis, target is the weight that as far as possible alleviates this layer, and in golf, what play the part of pivotal player is the aggregated momentum that can realize, therefore, it is contemplated that the special weight adjustment separately to carrier layer.Advantageously, layer is in addition arranged with respect to carrier layer symmetrically in parallel plane mode.Especially, impacted or the object that clashes into extremely important with the cycle that contacts between the sports apparatus 1 for the possibility that influences object.Therefore it is desirable providing

layer

111 or 112, and it is designed to increase the foregoing contact cycle and therefore has the high-caliber elasticity of flexure.In addition, by providing

layer

111 or 112 to promote stability of foundation with higher levels of crooked stability.This layer advantageously comprises heat modification wood.

In addition, exemplary embodiment shown in Figure 3 shows with respect to

layer

111 and 112 symmetrically arranged

layers

113 and 114, thereby shows the integral body of five layers.It is particularly advantageous when impacting characteristic that these two sides at hitting region 100 have identical.

In a favourable improvement, hitting region 100 or handle area 200 can comprise composite, for example carbon, aramid fiber, glass fibre or titanium.Special because its tensile strength of these composites and well-known.Combine with heat modification wood, the layer of realizing the elasticity of flexure can be combined with the wood with high relative density.Yet the weight of carbonized wood layer/composite layer only is the sub-fraction of the weight of superseded wood, and has therefore produced the very big potentiality of weight reduction.

Because the wood of high relative density can not bear suprabasil so-called tropical wood for very expensive not being arranged on usually usually, replace this wood to produce the advantage on the cost and help maintenance resources in addition by heat modification wood.Even when the tropical wood layer has been replenished the carbonized wood replacement of composite, also can realize the advantage on the cost.

According to the present invention, the layer bump that the above-described adjustment that is used to improve bending strength or weight reduction is selected to be not limited to sports apparatus 1 beats regional 100.Therefore, for example roughly can expect, in the method for weight reduction, replace the basic zone that constitutes by wood with forming by heat modification wood substantially and having part identical or more high bending strength.This improves the similar stability of design usually, but has alleviated weight.

In addition, according to the present invention, in the method that improves bending strength, can be with the zone that constitutes by wood substantially by the wooden part replacement that forms of the heat modification of same type substantially in sports apparatus.This makes can improve intensity in simple and cost-effective mode, and realizes the firmer structure of this design especially.Especially, owing to need not any other design measure, the part of thickening for example is provided or is sports apparatus 1 assembling support component, design cost also can reduce to a large extent.

In addition, using heat modification wood to make is very easy to by heat lamination connection layer structure.Heat lamination is understood to be in usually under the temperature that is higher than 100 ℃ and melts adhesives, and applies certain pressure comprises the laminate of at least two layers with connection building block.

The heat modification of employed wood causes low-down moisture, and the almost completely forfeiture of volatile substance and resin.In addition, the size of this wood is highly stable, because in the heat modification process, wooden internal stress has also reduced.Therefore, reaching when being higher than 100 ℃ temperature, the trend that getter action takes place reduces greatly, thereby sets up the simple heat lamination of the laminate with high-caliber dimensional stability.

Especially, therefore also can make weather-proof lamination and connect, for example by using corresponding plastic sheeting or weather proof resin as adhesives.Particularly advantageous is that nucleus can be laminated in the plastic sheeting by this way, so this nucleus obtains resistance to weathering in simple mode.

Yet uppermost tectal heat lamination is not got rid of the use plastic sheeting.

In the situation of table tennis bat, thereby can also expect using the bonding connection of unexpansive weather proof, therefore realize the weather proof of the bonding connection of coating material with foam rubber shape material.

Therefore, according to the present invention, sports apparatus impact the demand that characteristic can be adjusted to the user especially, thereby weight reduction and sports apparatus is improved to firm structure so that to be provided longer service life, and keeps low production cost.

Claims

1. a sports apparatus (1), particularly table tennis bat or golf club, have handle area (200) and have the hitting region (100) that is connected to described handle area (200), wherein, described hitting region (100) is at least in part by being constituted by thermally-denatured wood.

2. sports apparatus according to claim 1 is characterized in that, the exterior visual border surface of described at least hitting region (100) and/or handle area (200) is made of heat modification wood.

3. according to each described sports apparatus in the aforementioned claim, it is characterized in that this sports apparatus (1) is the weather proof structure.

4. according to each described sports apparatus in the aforementioned claim, it is characterized in that, this sports apparatus has the nucleus that is wrapped up by plastic sheeting fully, wherein, in the space at least two orthogonal directions, the ratio of the thickness of described film and the thickness of described nucleus was less than 1: 9.

5. according to each described sports apparatus in the aforementioned claim, it is characterized in that described hitting region (100) and/or handle area (200) to small part are made of conventional wood.

6. according to each described sports apparatus in the aforementioned claim, it is characterized in that described hitting region (100) and/or handle area (200) comprise a plurality of layers.

7. sports apparatus according to claim 6 is characterized in that, described layer (110,111,112,113,114) on border surface at least one direction in the space with parallel plane mode orientation, wherein, described layer (110,111,112,113,114) described parallel plane orientation (120) is preferably perpendicular to the preferred bounce-back direction (130) of described hitting region.

8. according to claim 6 or 7 described sports apparatus, it is characterized in that rebounding characteristic is selected to adjust by the material of described layer system (110,111,112,113,114).

9. according to each described sports apparatus in the claim 6 to 8, it is characterized in that distribution of weight is selected to adjust by the material of described layer system (110,111,112,113,114).

10. according to each described sports apparatus in the claim 6 to 9, it is characterized in that described hitting region (100) and/or handle area (200) comprise at least three layers.

11., it is characterized in that described hitting region (100) and/or handle area (200) have composite, particularly carbon, aramid fiber, glass fibre or titanium according to each described sports apparatus in the aforementioned claim.

12. method that alleviates the weight of sports apparatus, described sports apparatus has handle area (200) and has the hitting region (100) that is connected to described handle area, wherein, described sports apparatus (1) is made of wood at least in part, it is characterized in that the part that is made of wood is replaced by the part by the wooden one-tenth of heat modification with identical or lower level elasticity of flexure substantially.

13. method that improves the bending strength of sports apparatus, described sports apparatus has handle area (200) and has the hitting region (100) that is connected to described handle area, wherein, described sports apparatus (1) is made of wood at least in part, it is characterized in that substantially the zone that is made of wood is replaced by the part by the wooden one-tenth of heat modification of same type.

14. the method for each described sports apparatus is characterized in that in manufacturing such as the claim 6 to 11, described layer (110,111,112,113,114) connects by heat lamination at least in part.

15. method according to claim 14 is characterized in that, the uppermost cover layer of described hitting region (100) is stacked by heat lamination.