JPH09207501A - Tire for rescue vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain stable running performance even in an accident generating field under a high temperature condition or the like. SOLUTION: A tire 10 for a rescue vehicle is constituted by a part such as a reinforced member 16, metal net 28, compression coil spring 30, traction plate, 32, weld bolt 34 and 8 nut 36, all of these parts are made of metal. Accordingly, even in an accident occurring field with the ground surface at a high temperature and chemicals flowing out in the ground surface, the tire 10 is prevented from melting by heat and chemicals. Accordingly, even in the accident occurring field under 8 high temperature condition or the like, stable running can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rescue vehicle tire suitable for a rescue vehicle used when a disaster occurs.

[0002]

2. Description of the Related Art At a natural disaster occurrence site such as a volcanic eruption or an earthquake or an artificial disaster occurrence site such as a chemical factory explosion accident, the ground is heated to a high temperature due to pyroclastic flow or fire. Or, chemicals may have spilled to the ground. In such a case, when a normal rescue vehicle 100 as shown in FIG. 6 is run, since the tire 102 is made of rubber, the tread 102A of the tire 102 is melted due to heat or chemicals, which makes it impossible to run. May fall into a state. Therefore, in the past,
In such a case, it seems that a vehicle with a track is used, but the vehicle with a track has a disadvantage of low speed and lack of mobility.

Therefore, there is a demand for the development of a rescue vehicle capable of maintaining stable running performance even at such a disaster occurrence site. When attempting to develop a rescue vehicle to meet this demand, it is appropriate to approach from the viewpoint of improving the tires from the above-mentioned problems. From this point of view, it may be considered to improve the composition of the tire to make it flame-retardant or to have excellent chemical resistance, etc., but in any case, the main component of the tire is composed of an organic substance. However, under the above special circumstances, sufficient results cannot be obtained.

Although no prior art of a rescue vehicle approached from the viewpoint of tire improvement has been found, a reference prior art is the construction disclosed in Japanese Utility Model Laid-Open No. 5-91902. A brief description will be given below.

As shown in FIG. 7, according to the configuration disclosed in this publication, a large number of compression coil springs 108 are radially arranged between the rim 104A of the wheel 104 and the tread 106A of the tire 106. ing. That is, the vehicle body is not supported by the air pressure but is supported by the compression coil spring 108.
According to the above configuration, as described as the purpose, it may be effective for damage to a minute portion of the tread 106A such as a flat tire, but using the rubber tire 106 as before. Therefore, it is not possible to meet the above-mentioned demand.

In view of the above facts, an object of the present invention is to obtain a rescue vehicle tire which can be stably driven even at a disaster occurrence site under high temperature conditions.

[0007]

A rescue vehicle tire according to a first aspect of the present invention is arranged so as to cover the outer periphery of a rim portion of a metal wheel of a rescue vehicle and is fixedly supported by the wheel. And a plurality of metal biasing means disposed between the grounding member and the outer peripheral portion of the rim portion, the metal grounding member constituting the grounding surface, and biasing the grounding member radially outward. Is characterized by having.

A tire for a rescue vehicle according to a second aspect of the present invention is fixed to a metal wheel of a rescue vehicle and has a plurality of extending portions whose surface direction is the wheel radial direction, and these extending portions. A metallic reinforcing member including an annular portion arranged on the outer peripheral portion of the annular portion having the wheel circumferential direction as a surface direction, and arranged to cover the outer periphery of the annular portion of the reinforcing member and fixed to the reinforcing member. A metal grounding member that is supported by the grounding member and that forms a grounding surface; and a plurality of metal biasing means that is disposed between the reinforcing member and the grounding member and that biases the grounding member radially outward. It is characterized by having.

A rescue vehicle tire according to a third aspect of the present invention is the tire according to the first or second aspect of the present invention, further comprising a metallic adjustment means for adjusting the urging force of the urging means. It is characterized by

According to a fourth aspect of the present invention, in the tire for a rescue vehicle according to the third aspect of the invention, the tire is arranged with the radial direction of the wheel as an axial direction, and the tightening torque is adjusted to adjust the biasing means. It is characterized in that the adjusting means is constituted by a metal fastening means for adjusting the biasing force.

A tire for a rescue vehicle according to a fifth aspect of the present invention is the tire according to any one of the first to fourth aspects, further comprising a metal functioning as a slip stopper on the outer peripheral surface of the ground contact member. The non-slip members made of steel are arranged at a predetermined interval.

A rescue vehicle tire according to a sixth aspect of the present invention is characterized in that, in the fifth aspect of the invention, the anti-slip member is provided integrally with the fastening means.

According to the present invention as set forth in claim 1, a rescue vehicle tire has a ground member fixedly supported by a metal wheel to form a ground surface, and the ground member and the outer peripheral portion of the rim portion. And a plurality of biasing means disposed between the two, and since all of these constituent elements are made of metal, the ground may be hot or chemicals may leak to the ground. Tires will not be melted by heat or chemicals even in the event of a major disaster.

According to the present invention as set forth in claim 2, a rescue vehicle tire has a reinforcing member fixed to a metal wheel and including a plurality of extending portions and an annular portion, and an outer periphery of the annular portion of the reinforcing member. It is configured to include a grounding member arranged so as to cover it and a plurality of biasing means arranged between the reinforcing member and the grounding member, and since these constituent elements are all made of metal, Even in a disaster occurrence site where the ground is hot or chemicals are leaking to the ground, the tires are not melted by heat or chemicals.

Further, according to the present invention, since the reinforcing member, which is a separate component from the wheel, is fixed to the wheel, the reinforcing member can set the strength according to the required strength.

Further, according to the present invention, the tire size can be arbitrarily changed by changing the extension length of the extension portion of the reinforcing member.

According to the present invention of claim 3, claim 1
Alternatively, in the invention described in claim 2, since the adjusting means is further provided, the urging force of the urging means (the set load of the urging means) can be arbitrarily adjusted.

According to the present invention of claim 4, claim 3
In the invention described in (1), since the adjusting means is constituted by the metal fastening means, the biasing force of the biasing means can be arbitrarily adjusted by adjusting the fastening torque of the fastening means.

Further, according to the present invention, since the fastening means is arranged with the radial direction of the wheel as the axial direction, the rigidity against the lateral force during cornering can be enhanced as compared with the case where there is no fastening means.

According to the present invention of claim 5, claim 1
In the invention according to any one of claims 4 to 4, further, since the metal anti-slip members functioning as anti-slip are provided at a predetermined interval on the outer peripheral surface of the ground contact member, the tire is less likely to slip during traveling. That is, if the grounding member forming the grounding surface is made of metal, the tire is likely to slip, but according to the present invention, the anti-slip member is provided, so the tire is less likely to slip.

According to the present invention of claim 6, claim 5 is provided.
In the invention described in (1), since the anti-slip member is provided integrally with the fastening means, when the anti-slip member is worn and needs to be replaced, the anti-slip member can be replaced by simply removing the fastening means.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 4 shows a rescue vehicle 12 provided with a tire 10 according to this embodiment, and FIGS. 1 to 3 show a side view, a perspective view and a structural view of the tire 10, respectively. ing.

As shown in these figures, the tire 10
Includes a metal reinforcing member 16 fixed to the wheel 14 of the rescue vehicle 12 as a tire shell component member. The wheel 14 is naturally made of metal. The reinforcing member 16 includes a pair of ring plate-shaped reinforcing plates 18 fixed to the outer peripheral edge of the rim portion 14A of the wheel 14 by welding or a fastener such as a bolt or nut, and between the outer peripheral edges of these reinforcing plates 18. And an annular plate 20 arranged so as to be spanned and fixed by welding, fasteners such as bolts and nuts, and the like. The reinforcing plate 18 corresponds to the "extending portion" and the plate 20 corresponds to the "annular portion".

A plurality of working holes 22, which are elongated holes, are formed at predetermined intervals in the circumferential direction at the radial middle portion (widthwise middle portion) of the reinforcing plate 18. Further, a plurality of bolt insertion holes 24 are formed on the peripheral surface of the plate 20.
Further, on the surface side of the bolt insertion hole 24 in the plate 20, a cylindrical metal collar 26 is attached by welding or the like. The collar 26 is used from the viewpoints of preventing the compression coil spring 30 from bending (ensuring independence), guiding when expanding and contracting (ensuring vertical movability), and improving assembling, which will be described later.

On the outer peripheral surface of the plate 20 of the reinforcing member 16 described above, a metal wire net 28 as a grounding member assembled so that the mesh has a diamond shape is arranged. Wire net 28
Both side portions are bent toward both peripheral edge portions of the plate 20 and fixed to both peripheral edge portions of the plate 20 by welding or the like.
The wire netting 28 is used from the viewpoint of preventing the compression coil spring 30 from popping out, which will be described later, and improving the grounding property by increasing the grounding area.

Between the wire net 28 and the plate 20,
A plurality of metal compression coil springs 30 as an urging means are interposed. One end of the compression coil spring 30 is locked to the above-mentioned collar 26 in a press-fitted state,
The other end of the compression coil spring 30 is locked in contact with the back surface of the wire net 28. For this reason, the compression coil spring 30 urges the wire netting 28 outward in the radial direction. The compression coil spring 30 has a spring constant such that the compression coil spring 30 does not contract even if a compression force is applied manually. Further, these compression coil springs 30 are used from the viewpoint of securing a force equivalent to the air pressure in a pneumatic tire and improving riding comfort.

Further, on the outer surface of the above-mentioned wire mesh 28,
Metal traction plates 32, which serve as anti-slip members and are bent in a V shape in plan view, are arranged at predetermined intervals in the circumferential direction. This traction plate 32 has
A plurality of metal weld bolts 34 are fixed in advance at predetermined intervals by welding or fasteners such as screws. Then, these weld bolts 34 are inserted into the bolt insertion holes 24 of the plate 20 from the outside of the wire net 28, and the metal nut 36 is screwed from the inside (back surface side) of the plate 20, whereby the traction plate 32 is formed. The reinforcing member 16 is fixed to the plate 20 in a state of being lifted from the plate 20. The weld bolt 34 and the nut 36 are the "adjusting means" according to claim 3.
And corresponds to the "fastening means" in claim 4.

The traction plate 32 is a wire mesh 28.
As a result, the wire mesh 28
The traction plate 32 with a predetermined tension applied by the urging force of the compression coil spring 30.
It is strongly pressed and retained (shape retention).

Further, the above-mentioned traction plate 32
In the state in which is fixed, the weld bolt 34 erected from the traction plate 32 is inserted so as to pass through the axis of the compression coil spring 30. In other words, the bending angle of the traction plate 32 is set so that the weld bolt 34 passes through the axis of the compression coil spring 30. Since the weld bolt 34 is attached only to the traction plate 32,
The weld bolts 34 are not arranged in the inserted state at the axial centers of all the compression coil springs 30.

Next, the procedure for assembling the tire 10 will be described, and the operation and effect of this embodiment will be described through the explanation.

First, the pair of reinforcing plates 18 forming a part of the reinforcing member 16 are fixed to the outer peripheral edge of the rim portion 14A of the wheel 14 by welding, fasteners or the like. Next, the plate 20 constituting the remaining portion of the reinforcing member 16 is fixed by welding, fasteners or the like while being bent in the circumferential direction along the outer peripheral edges of the pair of reinforcing plates 18. Then, the collar 26 is fixed to a predetermined position of the plate 20 by welding or the like. The reinforcing member 16 may be sub-assembled in advance to the extent possible. That is, the plate 20 is fixed to the outer peripheral edges of the pair of reinforcing plates 18 by welding, fasteners, or the like to integrally integrate the two in advance to form the reinforcing member 16, and further, the collar 26 is provided at a predetermined position of the plate 20. It may be fixed by welding or the like.

Next, one end of the compression coil spring 30 is pressed into the collar 26. Next, the wire net 28 is put on the other end side of the compression coil spring 30. Next, the weld bolt 34 of the traction plate 32 is attached to the wire mesh 28.
Is inserted from the outside and is inserted into the bolt insertion hole 24. At this time, the weld bolt 34 is inserted so as to pass through the axis of the compression coil spring 30. Then, the nut 36 is screwed into the weld bolt 34 from the back surface side of the plate 20. At this time, the nut 36 is inserted from the work hole 22 provided in the reinforcing plate 18 and the fastening work is performed. As a result, the traction plate 32 is fixed to the plate 20 in a state where the wire netting 28 is sandwiched between the other end of the compression coil spring 30 and the traction plate 32.

After that, both side edges of the wire net 28 are reinforced by the reinforcing member 16.
The wire mesh 28 is fixed to the outer peripheral edge of the wire mesh by welding or the like, and the wire mesh 28 is end-treated.

According to the tire 10 of the present embodiment constructed by the above-mentioned assembling procedure, the reinforcing member 16, the wire netting 28, the compression coil spring 30, the traction plate 32, the weld bolt 34, and the nut 36 which constitute the tire 10 are provided. Since all the parts are made of metal, the tire 10 is not melted by heat or chemicals even at a disaster occurrence site where the ground is hot or chemicals are leaking to the ground. Therefore, stable driving becomes possible even at a disaster occurrence site under high temperature conditions. In addition, in the actual vehicle traveling (off-road) of the rescue vehicle 12 according to the present embodiment, good results regarding traveling performance are obtained.

According to this embodiment, the wheel 14
Since the reinforcing member 16 which is a separate component from the above is fixed to the wheel 14, the reinforcing member 16 can set the strength according to the required strength. In other words, the pair of reinforcing plates 18 is intended to increase the strength against a load acting in the vehicle vertical direction and the vehicle left-right direction, and the plate 20 is increased in strength from the viewpoint of improving the assembling property and the load resistance of the tire 10. Although there is an intention to try, since these required strengths are different from the required strengths required for the wheel 14 itself,
If the reinforcing member 16 that is a separate component from the wheel 14 is used, the strength can be easily tuned.

Further, according to this embodiment, the reinforcing member 1
Since 6 is composed of the pair of reinforcing plates 18 and the plate 20, the size of the tire 10 can be arbitrarily changed by changing the radial dimension (extending length) of the reinforcing plate 18. Therefore, the present invention can be applied to rescue vehicles 12 of various sizes.

Further, according to the present embodiment, by adjusting the fastening torque of the nut 36 with respect to the weld bolt 34 protruding from the traction plate 32, the biasing force of the compression coil spring 30 (set load of the biasing means).
Can be adjusted arbitrarily. Therefore, the ride comfort performance can be easily tuned. In addition,
Weld bolt 34 is used for all compression coil springs 3.
Since the urging force of all the compression coil springs 30 cannot be directly tuned because they are not inserted through 0, the compression coil springs 30 in which the weld bolts 34 are not inserted are connected via the wire net 28. The same tuning is indirectly performed.

Further, according to this embodiment, since the weld bolt 34 protruding from the traction plate 32 is arranged so as to pass through the axis of the compression coil spring 30, the weld bolt 34 is put in another way.
Since the radial direction is arranged as the axial direction, the rigidity against the lateral force at the time of cornering can be increased as compared with the case where the weld bolt 34 does not exist. Therefore, the steering stability during cornering can be improved.

Further, according to this embodiment, since the traction plates 32 are arranged on the outer peripheral surface of the wire net 28 at a predetermined interval, the tire 10 is less likely to slip during traveling. That is, since the metal net 28 forming the ground contact surface is made of metal, the tire 10 is likely to slip on the road surface. However, if the traction plate 32 is arranged on the outer peripheral surface of the metal net 28 as in the present embodiment, the tire 10 can be easily slipped. 10 becomes difficult to slip. Therefore, it is possible to improve the driving force and also improve the steering stability during traveling such as during cornering.

Further, according to this embodiment, since the traction plate 32 and the weld bolt 34 are integrated by welding, when the traction plate 32 is worn, the traction plate 32 can be easily removed by removing the nut 36. Can be exchanged. Therefore, the workability of exchanging the traction plate 32 can be improved.

In the present embodiment, the reinforcing member 16 is formed separately from the wheel 14, but the present invention is not limited to this, and the reinforcing member 16 may be formed integrally with the wheel 14.

Further, in the present embodiment, both side edges of the wire netting 28 are fixed to the outer peripheral edge of the reinforcing member 16 by welding or the like, but the invention is not limited to this, and locking pins are provided near the outer peripheral edge of the reinforcing plate 18 of the reinforcing member 16. Alternatively, both side edges of the wire netting 28 may be locked while standing upright. In that sense, "fixedly supported" in the grounding member according to claim 1 and "fixedly supported" in the grounding member according to claim 2 mean that both side edges of the wire netting 28 are formed by welding or the like. It includes both the case of completely fixing and the case of engaging with a locking means such as a locking pin.

Furthermore, in the present embodiment, the reinforcing plate 18 of the reinforcing member 16 is a pair, but the number is not limited to this, and a plurality of reinforcing plates may be used. For example, a reinforcing plate may be added to the middle portion of the pair of reinforcing plates 18. You may take the structure of these.

Further, according to the present embodiment, the adjusting means for adjusting the urging force of the compression coil spring 30 is constituted by using the fastening means such as the weld bolt 34 and the nut 36, but the present invention is not limited to this, and other than the fastening means. The adjusting means may be configured according to the configuration.

Further, according to the present embodiment, the weld bolt 34 is integrally provided on the traction plate 32 by welding or the like, but the present invention is not limited to this, and both may be constructed separately. In this case, for example, a wire mesh having a mesh shape is used, and the traction plate 3 is provided on the outer peripheral surface of the wire mesh.
With respect to No. 2, it is possible to attach them individually by welding or the like, and to integrally form a portion corresponding to a washer in a mesh having appropriate intervals, and to weld a bolt to this portion.

Further, in the present embodiment, the compression coil spring 30 is used as the urging means, but the present invention is not limited to this, and any metal spring may be used, such as a bamboo shoot spring,
Various springs such as a disc spring and a leaf spring can be used. Even if the compression coil spring 30 is used as in this embodiment, springs A to C having various spring constants can be selected as shown in the graph of FIG.

Further, in this embodiment, the weld bolt 34 is pre-welded to the traction plate 32, but the nut 36 may be pre-welded to the plate 20.

Further, in the present embodiment, the metal net 28 is used as the grounding member, but the present invention is not limited to this, and any metal member forming the grounding surface may be used.

In the above-mentioned embodiment, the tire 1
As the material of components such as the reinforcing member 16, the wire net 28, the compression coil spring 30, the traction plate 32, the weld bolt 34, and the nut 36, which constitute 0,
Metals such as iron, stainless steel and titanium can be mentioned.

[0051]

As described above, the rescue vehicle tire according to the present invention as set forth in claim 1 is arranged so as to cover the outer periphery of the rim portion of the metal wheel of the rescue vehicle and is fixed to the wheel. And a plurality of metal biasing members that are arranged between the grounding member and the outer peripheral portion of the rim and that are biased outward in the radial direction and that are supported by the Since all the constituent elements are made of metal, it has an excellent effect that stable traveling is possible even at a disaster occurrence site under high temperature conditions.

A rescue vehicle tire according to a second aspect of the present invention is fixed to a metal wheel of a rescue vehicle, and has a plurality of extending portions whose surface direction is the wheel radial direction, and these extending portions. A metallic reinforcing member including an annular portion arranged on the outer peripheral portion of the annular portion having the wheel circumferential direction as a surface direction, and arranged to cover the outer periphery of the annular portion of the reinforcing member and fixed to the reinforcing member. A metal grounding member that is supported by the grounding member and that forms a grounding surface; and a plurality of metal biasing means that is disposed between the reinforcing member and the grounding member and that biases the grounding member radially outward. Since it is configured to include and all the constituent elements are made of metal, it has an excellent effect that stable driving is possible even at a disaster occurrence site under high temperature conditions.

Further, according to the present invention, since the reinforcing member, which is a separate component from the wheel, is fixed to the wheel, the strength setting according to the required strength can be performed by the reinforcing member. It has an excellent effect that the tuning can be facilitated.

Further, according to the present invention, the tire size can be arbitrarily changed by changing the extension length of the extension portion of the reinforcing member, so that the invention can be applied to rescue vehicles of various sizes. It has an excellent effect of being able to.

A rescue vehicle tire according to a third aspect of the present invention is the tire for a rescue vehicle according to the first or second aspect of the present invention, further comprising a metal adjusting means for adjusting the urging force of the urging means. Therefore, the urging force of the urging means (the set load of the urging means) can be arbitrarily adjusted, which has an excellent effect that the ride comfort performance can be easily tuned.

A rescue vehicle tire according to a fourth aspect of the present invention is the tire for a rescue vehicle according to the third aspect of the invention, wherein the wheel radial direction is arranged as an axial direction and the biasing means is provided by adjusting the fastening torque. Since the adjusting means is composed of the metal fastening means that adjusts the power, the rigidity against lateral force during cornering can be increased compared to the case where there is no fastening means, which improves the steering stability during cornering. It has an excellent effect that it can be made.

A rescue vehicle tire according to a fifth aspect of the present invention is the tire according to any one of the first to fourth aspects, wherein the tire is made of metal and functions as a slip stopper on the outer peripheral surface of the ground contact member. Since the anti-slip members are arranged at a predetermined interval, it is possible to reduce the slip occurrence rate of the tire during traveling, which can improve the driving force and the steering stability during cornering. It has an excellent effect that it can be done.

In the rescue vehicle tire according to the present invention as defined in claim 6, in the invention as defined in claim 5, since the anti-slip member is provided integrally with the fastening means, the anti-slip member can be provided simply by removing the fastening means. It has an excellent effect that it can be replaced, and thus the workability of replacing the anti-slip member can be improved.

[Brief description of drawings]

FIG. 1 is a side view showing a tire for a rescue vehicle according to the present embodiment.

2 is a perspective view of the tire shown in FIG. 1. FIG.

FIG. 3 is a schematic configuration diagram of the tire shown in FIG.

4 is a perspective view showing a rescue vehicle including the tire shown in FIG. 1. FIG.

FIG. 5 is a graph showing spring characteristics of springs.

FIG. 6 is a perspective view of a rescue vehicle according to a conventional example.

FIG. 7 is a cross-sectional view showing a tire according to another conventional example.

[Explanation of symbols]

 10 Tire 12 Rescue Vehicle 14 Wheel 14A Rim Part 16 Reinforcement Member 18 Reinforcement Plate (Extended Part) 20 Plate (Ring) 28 Wire Mesh (Grounding Member) 30 Compression Coil Spring (Biasing Means) 32 Traction Plate (Anti-slip Member) 34 Weld bolt (fastening means, adjusting means) 36 Nut (fastening means, adjusting means)

Claims (6)

[Claims] 1. A metal grounding member which is arranged to cover the outer periphery of a rim portion of a metal wheel of a rescue vehicle and which is fixedly supported by the wheel and constitutes a grounding surface, and the grounding member and the rim. A plurality of biasing members made of metal, which are disposed between the outer peripheral portion of the portion and bias the ground member outward in the radial direction, and a rescue vehicle tire. 2. A plurality of extending portions fixed to a metal wheel of a rescue vehicle and having a wheel radial direction as a surface direction, and arranged on outer peripheral portions of these extending portions and having a wheel circumferential direction as a surface. A reinforcing member made of metal including an annular portion that is oriented in the direction, and a metal grounding member that is disposed so as to cover the outer periphery of the annular portion of the reinforcing member and is fixedly supported by the reinforcing member and that constitutes a ground plane. A rescue vehicle tire, comprising: a member; and a plurality of metal biasing members that are disposed between the reinforcing member and the ground member and that bias the ground member outward in the radial direction. 3. The rescue vehicle tire according to claim 1, further comprising a metal adjusting means for adjusting the biasing force of the biasing means. 4. The adjusting means is constituted by a metal fastening means which is arranged with a radial direction of a wheel as an axial direction, and which adjusts a biasing force of the biasing means by adjusting a fastening torque. The rescue vehicle tire according to claim 3. 5. The anti-slip member made of metal, which functions as an anti-slip, is arranged on the outer peripheral surface of the ground member at a predetermined interval, and the anti-slip member is arranged at a predetermined interval. Tires for rescue vehicles. 6. The rescue vehicle tire according to claim 5, wherein the anti-slip member is provided integrally with the fastening means.