JP2010175001A - Fixing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size and the weight of a bolt used for fixing a cylindrical fixed object such as a high pressure tank by a band laid around an outer periphery of the cylindrical fixed object. <P>SOLUTION: When fixing a high pressure tank T by a tank band 140, a first fixing end 141 of the tank band 140 is fixed to a platform F, and a band holding mechanism 200 is used for a second fixing end 142. In the band holding mechanism 200, a nut 203 is screwed with the bolt 202 inserted into a through hole 212 of a cylindrical body 210, a through hole 142a of the second fixing end 142 and a through hole FH of a band fixing part 116, and a bottom part 211 of the cylindrical body 210 is pulled to the surface of the band, and a coil spring 204 is in a compressed state between the surface of the band and an opening outer edge 214 of the cylindrical body 210. The compressed coil spring 204 presses the second fixing end 142 of the tank band 140 to the platform F while applying tension to the tank band 140 so as to hold it. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fixing structure for fixing a cylindrical object to be fixed such as a high-pressure tank, and more specifically, by holding a fixed end of a band-shaped band spanned on the outer periphery of the object to be fixed to a band holding part. It is related with the fixed structure which fixes.

  In recent years, opportunities for mounting high-pressure tanks on vehicles have increased. For example, in a vehicle equipped with a fuel cell, hydrogen gas that is fuel gas of the fuel cell is stored in a high-pressure tank, and the high-pressure tank is mounted on the vehicle. The high-pressure tank is affected by the outside air temperature, the amount of stored gas consumed, and the like, causing the outer diameter of the tank to expand. Therefore, when a high-pressure tank is mounted on the vehicle after absorbing such expansion, various methods have been proposed in which a belt-like band stretched around the outer periphery of the tank is tensioned by a coil spring (for example, Patent Document 1).

JP-A-10-278601 JP 2004-169767 A

  In the method proposed in the above-mentioned patent document, the coil spring is in a compressed state in which a compression allowance and an extension allowance are left for the purpose of applying a tension according to the degree of expansion / contraction of the tank to the band by the compression / extension of the spring. There is a need. Therefore, it is required for the bolt that holds the coil spring to hold the coil spring with a certain length, and a long bolt having a shaft portion having a length corresponding to the spring length is used for holding the coil spring. .

  By the way, the bolt that holds the coil spring with the bolt head is not only subjected to a force accompanying the expansion of the tank, but also an external force is applied to the vibration of the tank, a sudden acceleration or a sudden braking of the tank-equipped vehicle, and a vehicle collision. Although these external forces may be significantly greater than the forces associated with the expansion of the tank, these external forces are received by a long bolt. In such a case, since the bolt becomes longer as the bolt becomes longer, a long and large-diameter bolt is used for holding the coil spring and the band. As a result, the bolt is increased in size and weight. It is desirable to solve such a problem not only in a vehicle equipped with a high-pressure tank, but also in stationary equipment that holds the high-pressure tank with a band.

  In view of the above-described problems, an object of the present invention is to reduce the size and weight of a bolt that is used when a cylindrical fixed object such as a high-pressure tank is fixed with a band that extends around the outer periphery thereof.

  In order to achieve at least a part of the above object, the present invention adopts the following configuration.

[Application 1: Fixed structure]
A fixing structure for fixing the fixed object by holding a fixed end of a band-shaped band spanned on the outer periphery of the cylindrical fixed object on a band holding part,
A bolt inserted into a band side through hole at the fixed end of the band and a holding part side through hole of the band holding part;
A nut screwed into the male thread of the bolt;
A coil spring;
A bottomed tubular body having an outer diameter smaller than the coil diameter of the coil spring, the tubular body having an opening outer edge extending outward on the opening side;
The coil spring overlaps with the band through hole and is arranged in contact with one end side of the spring on the surface of the band,
The cylindrical body is inserted into the coil spring, and the other end side of the coil spring is received at the outer edge of the opening in a state where the bottom portion of the cylindrical body is separated from the surface of the band.
The bolt and the nut inserted into the band side through hole and the holding part side through hole pull the bottom portion of the cylindrical body toward the band surface side by screwing the male screw and the nut. The gist is that the coil spring is compressed between the surface of the band and the outer edge of the opening, and the band is held under tension by the compressed coil spring.

  In the fixing structure having the above configuration, the coil spring is received by the band surface, the other end of the coil spring is received by the outer edge of the opening of the cylindrical body, the coil spring is compressed, and the band is tensioned by the compressed coil spring. Hold. With such a band holding, the object to be fixed is fixed by a band-shaped band that extends around the outer periphery of the cylindrical object to be fixed. Since the bottom of the cylindrical body already inserted into the coil spring in the compressed state is separated from the band surface, this separation distance is ensured as a compression allowance or expansion allowance of the coil spring. Therefore, even if the fixed object to be fixed is expanded / contracted, the expansion / contraction is absorbed by the compression / extension of the coil spring.

  The compression of the coil spring that applies tension to the band in the fixing structure having the above configuration is achieved by screwing the male screw of the bolt inserted into the band side through hole of the band and the holding unit side through hole of the band holding part and the nut into a cylindrical body. This is done by pulling the bottom of the band toward the band surface. That is, the bolt and the nut only have to exert a pulling force toward the band surface at the bottom of the cylindrical body in the screwed state. And since the bottom part of the cylindrical body on which the bolt and nut in the screwed state exert force, the spring length of the coil spring in the compressed state approaches the band surface side by the opening outer edge of the cylindrical body that defines the other end side of the spring. The bolt can be shortened accordingly. Therefore, the bolts can be reduced in size and weight by shortening the bolts. Further, since the bolt strength is increased by shortening the bolt, it is possible to hold an object to be fixed such as a large and heavy tank. In addition, since the external force acting for some reason can be received with a short bolt, the effectiveness of avoiding the damage of the bolt is enhanced, and the cylindrical object is fixed with a band extending around the outer periphery. Reliability can be improved.

  Moreover, in the fixed structure of the said structure, since the cylindrical part is inserted in the coil spring, a cylindrical part outer wall can be used as a guide of a coil spring. Therefore, the spring is compressed and extended without inadvertently moving the coil spring in and out of the coil diameter, so that the spring operation can be stabilized. In addition, since the assembly work can be performed in a state where the spring is guided by the outer wall of the cylindrical portion, workability is also improved.

  The above-described fixing structure can be in the following mode. For example, the cylindrical body is provided with a bottom through-hole at the bottom, the bolt is inserted into the bottom through-hole, and a bolt head or nut is provided on the upper surface side of the bottom that contacts the inside of the cylindrical body. It can be arranged. In this way, in a state where the nut is screwed onto the bolt, the cylindrical body can be drawn from the upper surface side of the bottom portion to the belt surface side on the lower surface of the bolt head or the lower surface of the nut.

  In this case, when the bolt head of the bolt is disposed on the upper surface side of the bottom portion, the bolt head is disposed on the upper surface side of the bottom portion with a washer disposed so as to overlap the bottom through hole. You can In this way, the washer interposed between the bottom of the tubular body and the bolt head pulls the tubular body from the upper surface side of the bottom portion to the belt surface side. Can be big. Therefore, the bolt insertion operation into the through hole is facilitated. Moreover, the bolt need not have a shape having a flange or a large-diameter portion for spring guidance on the bottom surface of the bolt head. For this reason, it is not necessary to cut and manufacture a bolt having a bolt head, a flange, a large diameter portion, and a male screw shaft from the shaft material, and an existing bolt can be used. Therefore, cost reduction and weight reduction can be achieved.

  Further, when the nut is disposed on the upper surface side of the bottom portion, a female screw hole is overlapped on the bottom through hole, and the nut can be welded to the upper surface side of the bottom portion. By doing so, the nut does not move inside the cylindrical body, and the screwing operation between the male screw of the bolt and the nut becomes easy.

  Further, the bottom portion of the cylindrical body is welded to the top surface of the bolt head of the bolt so that the cylindrical body and the bolt are integrated, or a bottom through hole provided in the bottom portion of the cylindrical body is provided with the nut. The cylindrical body can be integrated with the nut by overlapping the female screw hole and welding the bottom to the top surface of the nut. By doing so, the cylindrical body can be handled together with the bolts or nuts, so that the assembling work is simplified.

  The tubular body thus welded may be detached from the welding location on the top surface of the bolt head or the top surface of the nut when an external force is applied. However, even if the cylindrical body is detached, the screw and the nut are maintained in the screwed state, so that the band is not detached from the band holding portion. On the other hand, in the existing structure, if a long bolt is damaged by an external force, the band comes off from the band holding portion. Therefore, in the fixing structure of the above aspect, even when a large external force is applied, it is possible to avoid releasing the object to be fixed from the band by holding the band on the band holding portion. It should be noted that the above-described shortening of the bolt can realize such band holding and avoiding the release of the object to be fixed from the band with high effectiveness.

  Further, the band holding portion can be formed at the fixed end of another band-shaped band that is stretched over the fixed object. If it carries out like this, the band spanned to the to-be-fixed object will be fastened, trying to avoid the damage of a bolt with high effectiveness, and the to-be-fixed object can be fixed with high reliability by the band thus fastened.

[Application 2: Fixed structure]
A fixing structure for fixing the object to be fixed with a band-shaped band that extends around the outer periphery of the cylindrical object to be fixed,
A band holding part that includes a female screw and holds the fixed end of the band;
A bolt having a male screw inserted into a band-side through hole at the fixed end of the band and screwed into the female screw of the band holding portion;
A coil spring;
A bottomed tubular body having an outer diameter smaller than the coil diameter of the coil spring, the tubular body having an opening outer edge extending outward on the opening side;
The coil spring is disposed in contact with one end side of the spring on the surface of the band surrounding the band through-hole,
The cylindrical body is inserted into the coil spring and receives the other end side of the coil spring at the opening outer edge while separating the bottom of the cylindrical body from the band surface,
The bolt inserted into the band side through-hole pulls the bottom portion of the cylindrical body toward the band surface side by screwing the band holding portion to the female screw, and the band surface and the opening outer edge. The gist of the present invention is to fix the object to be fixed by setting the coil spring in a compressed state and holding the band with tension by the compressed coil spring.

  In the fixing structure having the above-described configuration, a bolt is screwed into the female screw included in the band holding portion, so that a force that draws toward the band surface side is exerted on the bottom of the cylindrical body, similarly to the fixing structure having the above-described configuration. Therefore, it is possible to shorten the bolt, improve the effectiveness of avoiding breakage of the bolt by this, and improve the reliability of fixing the fixed object by the band.

  If the fixed part fixed with the band as described above is a high-pressure tank, in the equipment equipped with the high-pressure tank and the high-pressure tank, the effectiveness of avoiding the damage of the bolt due to the shortening of the bolt is effective. It is possible to improve the reliability of fixing the object to be fixed by the band.

  Hereinafter, embodiments of the present invention will be described based on examples. FIG. 1 is an explanatory view showing an in-vehicle state of a high-pressure tank T when a fixing structure as an embodiment of the present invention is applied to a vehicle equipped with a high-pressure tank, and FIG. FIG. 3 is an explanatory view showing the state of holding the high-pressure tank T mounted on the vehicle, with the main part broken away.

  As shown in FIG. 1, the vehicle 10 mounts the high-pressure tank T horizontally below the platform F so that the tank longitudinal direction is the vehicle width direction. The high-pressure tank T stores hydrogen gas at a high pressure. Hydrogen gas stored in the tank is supplied from a high-pressure tank T to a fuel cell (not shown) mounted on the vehicle 10 via a gas pipe (not shown), and is decompressed by a pressure reducing valve (not shown) when the gas is supplied. The high-pressure tank T is mounted horizontally in the vehicle width direction on the rear side of the axle of the rear wheel RT, and can be mounted side-by-side on the back side of the paper or mounted side-by-side on the rear side of the tank position shown in the figure. Is possible.

  The high-pressure tank T is made of resin, and as shown in FIG. 2, has a long and cylindrical shape, and has a metal valve base TVB on one end side of the tank. The valve base TVB has a tank-filled gas flow path and is attached to one end of the tank to be connected to a gas pipe.

  The vehicle 10 according to the present embodiment includes a tank housing recess 110 formed in the lower surface of the vehicle platform F so as to be recessed in the vehicle width direction, and a tank band 140 that is stretched over the lower end side half circumference of the high-pressure tank T. Then, it is held on the platform F by using the band holding mechanism 200. The tank housing recess 110 includes a front inclined surface 112F and a rear inclined surface 112R that extend in the vehicle width direction and are opposed to each other at the front and rear of the vehicle, and a recessed groove 114 that extends in the vehicle width direction between both the inclined surfaces. Both the inclined surfaces facing each other across the recessed groove 114 abut on the tank cylinder side surface at different positions on the outer periphery of the high-pressure tank T. That is, when the high-pressure tank T is brought into contact with the front inclined surface 112F and the rear inclined surface 112R, the horizontally placed high-pressure tank T is supported by both inclined surfaces, so that the tank is positioned in the tank radial direction. Is done. In this case, since both the inclined surfaces are located above the mounted high-pressure tank T, the high-pressure tank T is brought into contact with the inclined surfaces in the vertical direction and the left-right direction (that is, the vehicle vertical direction). And the vehicle longitudinal direction). Positioning in the rotational direction of the high-pressure tank T is performed by a technique such as using a valve base TVB, but the description thereof is omitted because it is not directly related to the gist of the present invention.

  The tank band 140 is made of steel, and both ends thereof are a first fixed end 141 and a second fixed end 142. Both fixed ends are provided with through holes 141a and 142a. The through hole 141a is a circular through hole larger than the bolt diameter, and the through hole 142a is an oblong long hole. The tank band 140 is fixed to the band fixing portion 116 at the first fixing end 141 by screwing the bolt 143 into the female screw FS of the band fixing portion 116 of the platform F. At this time, a plain washer 144 is used, and a split washer can be used together. In addition, the bolt 143 is screwed using a nut in the same manner as the holding of the second fixed end 142, which will be described later. It may be tightened. In this embodiment, the bolt 143 is a hexagon socket head bolt, but it may be a hexagon bolt. The tank band 140 is held by the band fixing portion 116 of the platform F using the band holding mechanism 200 on the second fixed end 142 side. Due to such band holding, the tank band 140 extends the high-pressure tank T in contact with the front inclined surface 112F and the rear inclined surface 112R facing each other in the tank storage recess 110 in a state of being stretched over the lower half of the outer periphery of the tank. Tighten and fix toward both sides.

  In order to mount the high-pressure tank T, the second fixed end 142 of the tank band 140 is removed from the platform F, and a tank lifter (not shown) that raises and lowers the horizontally placed high-pressure tank T is directed toward the tank housing recess 110. Lift the high-pressure tank T. This tank lifting is performed until the side surface of the high-pressure tank T comes into contact with the front inclined surface 112F and the rear inclined surface 112R facing each other in the tank housing recess 110. Positioning in the rotational direction of the tank is also performed before and after the tank lift and the slope contact.

  Next, the tank band 140 is held on the platform F using the band holding mechanism 200. The band holding mechanism 200 includes a bolt 202, a nut 203, a coil spring 204, and a cylindrical body 210. The cylindrical body 210 is cup-shaped through a deep drawing of a thin steel plate such as stainless steel, has a through hole 212 in the bottom portion 211, and has an opening outer edge 214 extending outward on the opening side of the cylindrical peripheral wall portion 213, and the outer edge Is provided with an outer edge portion 215 extending toward the cylindrical peripheral wall portion 213. In this case, the cylindrical body 210 has a cylindrical peripheral wall portion 213 having an outer diameter smaller than the coil diameter of the coil spring 204.

  The coil spring 204 is disposed in contact with one end side of the spring on the surface of the band in a state where the coil spring 204 is overlapped with the long hole-shaped through hole 142 a of the second fixed end 142, and the cylindrical body 210 has a cylindrical peripheral wall portion 213 attached to the coil spring 204. Inserted from the bottom 211 side, the other end of the coil spring 204 is received by the opening outer edge 214 in a state where the bottom 211 is separated from the band surface. The bolt 202 is a hexagon socket head cap screw, and is inserted into the through hole 212 of the cylindrical body 210 with the plain washer 205 interposed, and the through hole 142 a of the second fixed end 142 and the second fixed end 142 of the tank band 140. The nut 203 is screwed in a state where the nut 203 is also inserted into the through hole FH in the band fixing portion 116 of the platform F to be held. The nut screwing is preferably a so-called double nut in order to prevent loosening. By screwing the nut 203 and the bolt 202, the bolt 202 presses the bottom portion 211 of the cylindrical body 210 from the upper surface side to the band fixing portion 116 via the flat washer 205, and the bottom portion 211 of the cylindrical body 210 is pressed. The coil spring 204 is pulled toward the band surface side, and the coil spring 204 is compressed between the band surface and the opening outer edge 214 of the cylindrical body 210. Therefore, the coil spring 204 compressed in this manner presses and holds the second fixed end 142 of the tank band 140 against the platform F while applying tension to the tank band 140. The high-pressure tank T is fixed to the platform F by the tank band 140 thus held. The second fixed end 142 has a multilayer structure or is reinforced with a rib (not shown) to ensure strength.

  The vehicle 10 of the present embodiment described above holds the tank band 140 that is stretched over the lower half of the tank lower end side by the band holding mechanism 200 with tension applied by the coil spring 204, and the second fixed end 142 of the tank band 140 is held. The space | interval of the band surface and the bottom part 211 of the cylindrical body 210 is ensured. Then, the compression of the coil spring 204 for applying tension to the tank band 140 and the securing of the above-described interval are performed in accordance with the through hole 212 of the cylindrical body 210, the through hole 142a of the second fixed end 142, and the through hole FH of the band fixing portion 116. The nut 203 is screwed into the male screw of the bolt 202 inserted into the upper part of the bolt 202, and the bottom of the cylindrical body is drawn toward the band surface. That is, the bolt 202 and the nut 203 only have to exert a force that draws the bottom surface 211 of the cylindrical body 210 toward the band surface in the screwed state. And the bottom part 211 of the cylindrical body 210 to which the bolt 202 and the nut 203 in the screwed state exert a force is from the opening outer edge 214 of the cylindrical body 210 that defines the spring length of the coil spring 204 in the compressed state on the other end side of the spring. Since it is close to the band surface side, the bolt 202 can be shortened accordingly. As a result, according to the band holding mechanism 200 of the present embodiment, the external force applied for some reason can be received by the short bolt 202, so that the effectiveness of avoiding damage to the bolt 202 is enhanced, and the high-pressure tank T is installed. The reliability at the time of fixing with the band over the outer periphery can be improved. In addition, there are the following advantages as the bolts become shorter.

  Since a shaft material such as a bolt decreases in bending strength as it becomes longer, when an external force is applied due to vehicle sudden braking or the like, a longer bolt is likely to bend. However, in this embodiment, since it is a short bolt as described above, the bending strength is increased, the strength against external force is increased accordingly, and the reliability of tank fixing is increased. In addition, in order to increase the bending strength with a long bolt, it is necessary to increase the bolt diameter, which causes an increase in weight. However, since the bolt 202 of this embodiment is short, the large diameter long bolt Compared with the case where the same strength is ensured, the size and weight can be reduced. In addition, since the bolt 202 is shortened to increase the strength of the bolt, even the large and heavy high-pressure tank T can hold the tank with high reliability.

  Further, in the band holding mechanism 200 of this embodiment, since the cylindrical body 210 is inserted into the coil spring 204, the outer wall of the cylindrical portion can be used as a guide for the coil spring. Therefore, stable spring compression and expansion can be achieved without inadvertently moving the coil spring 204 in and out of the coil diameter, so that the spring operation can be stabilized. Moreover, since the coil spring 204 is guided by the outer wall of the cylindrical portion, assembly work such as insertion of the bolt 202 into each through hole and screwing of the bolt and nut after the insertion can be performed.

  In addition, in the existing structure in which the coil spring 204 is held only by the bolt without using the cylindrical body 210, a flange for receiving the upper end of the spring is provided on the lower surface of the bolt head, and a large-diameter portion for spring guidance is continued from the flange. Therefore, it is necessary to make the bolt shape unique. Therefore, the existing holding mechanism requires a cutting process of a bolt having a bolt head, a flange, a large diameter portion, and a male screw shaft from the shaft material. However, the band holding mechanism 200 according to the present embodiment uses the cylindrical body 210 and the bolt head is interposed in the bottom portion 211 with the flat washer 205, so that the above-described cutting process from the shaft material becomes unnecessary. The existing bolt can be used. Therefore, cost reduction and weight reduction can be achieved. Further, since the cylindrical body 210 is drawn from the upper surface side of the bottom portion 211 to the belt surface side via the plain washer 205, the through hole 212 can be made larger than the shaft diameter of the bolt 202, so that the bolt is inserted into the through hole 212. Work becomes easy.

  Further, in the band holding mechanism 200 of the present embodiment, the cylindrical body 210 has an outer edge portion 215 following the opening outer edge 214 on the upper end opening side of the cylindrical peripheral wall portion 213, and this outer edge edge portion 215 is connected to the cylindrical peripheral wall portion. It is assumed that it extends to the side of 213. Therefore, since the outer edge edge portion 215 can guide the spring on the outer diameter side of the coil spring 204, it is useful for ensuring stable spring operation and simplifying assembly workability.

  In addition, since this cylindrical body 210 is a deep-drawn molded product of a thin steel plate, when an excessive external force is applied for some reason, it breaks before the coil spring 204, reducing the impact when an external force is applied. it can. By the way, even if the cylindrical body 210 is broken in this way, the tank band 140 remains held on the platform F by the bolt 202 and the coil spring 204, so that it is preferable that the high-pressure tank T can be prevented from falling off.

  Next, another embodiment will be described. 4 is an explanatory view showing the band holding mechanism 200 in which the arrangement of the bolt and the nut is reversed, and FIG. 5 is an equivalent view of FIG. 3 and shows the band holding mechanism 200 in which the bolt is directly screwed to the platform F. It is explanatory drawing shown.

  As shown in FIG. 4, in the band holding mechanism 200, the bolt 202 is inserted from the platform F side with a plain washer 205, the through hole FH, the through hole 142 a of the second fixed end 142, and the through hole of the cylindrical body 210. The nut 203 is screwed inside the cylindrical body 210. The nut 203 is welded to the upper surface side of the bottom portion 211 with a female screw hole overlapped with the through hole 212 in the bottom portion 211 of the cylindrical body 210. In the band holding mechanism 200, the nut 203 does not move inside the cylindrical body 210, so that the screwing operation between the male screw of the bolt 202 and the nut 203 can be facilitated. In this case, the band holding mechanism 200 shown in FIG. 4 can also achieve the shortening of the bolt 202 and the effects described above. In FIG. 4, the nut 203 can be welded to the lower surface side of the bottom portion 211 of the cylindrical body 210, that is, the band surface side.

  In the band holding mechanism 200 shown in FIG. 5, the bolt 202 may be directly screwed into the female screw FS of the platform F. In this case, the band holding mechanism 200 of FIG. 5 can also achieve the shortening of the bolt 202 and the effects described above.

  FIG. 6 is a view corresponding to FIG. 1, and is an explanatory view showing a state in which the high-pressure tank T is mounted in the vehicle 10 </ b> A using the band holding mechanism 200. As shown in the drawing, in this embodiment, when the tank storage recess 110 is formed to be recessed in the platform F, the tank storage recess 110 is formed upward. In this way, after the high-pressure tank T is lowered from the vehicle trunk room side into the tank storage recess 110 of the platform F, it is passed over the tank upper half by the tank band 140, and the band is held from above the tank by the band holding mechanism 200. What is necessary is just to hold. For this reason, since the worker engaged in mounting and fixing the tank can work from the side of the vehicle trunk room, the worker is not forced to take an unreasonable posture, which can contribute to reduction of work load and improvement of workability.

  Next, an embodiment in the form of a so-called sub-assembly product in which a tank is mounted in advance will be described. FIG. 7 is a view corresponding to FIG. 1 and is an explanatory view showing a state in which the high-pressure tank T is mounted in the vehicle 10B using the band holding mechanism 200. FIG. 8 is a view corresponding to FIG. FIG. 9 is a view corresponding to FIG. 3 and is an explanatory view showing the state of holding the high-pressure tank T mounted on the vehicle, with the main part broken away. In this embodiment, the tank housing recess 110 is formed in a recessed manner in a tank subframe TSF fixed to the platform F, the high pressure tank T is fixed to the tank subframe TSF, and then the frame is fixed to the platform F.

  As shown in FIG. 7, the vehicle 10B of this embodiment includes a platform F as a front platform FL and a rear platform FR on the rear wheel RT side, and tank subframes TSF are fixed to the front and rear platforms. The tank sub-frame TSF is provided with a tank housing recess 110 as in the platform F of the embodiment described above, and the left and right band fixing portions 116 on the opening side of the recess have a female screw FS for fixing the tank band 140. And a through-hole 117 for fixing to the platform F. The high-pressure tank T is mounted and mounted on the vehicle as follows.

  First, the high-pressure tank T is placed in the tank housing recess 110 of the tank subframe TSF, and as described above, the first fixed end 141 of the tank band 140 is connected to the female screw FS of the tank subframe TSF with the bolt 143. By screwing, it is fixed to the tank subframe TSF. On the second fixed end 142 side, the tank band 140 is held as described above by screwing the bolt 202 of the band holding mechanism 200 into the female screw FS of the tank subframe TSF. As a result, a tank sub-assembly product is obtained in which the high-pressure tank T is fixed to the tank sub-frame TSF with the tank band 140 under tension.

  Next, the tank sub-assembly product is placed from the vehicle trunk room side between the front platform FL and the rear platform FR of the vehicle 10B. Then, the tank subframe TSF is fixed to the front and rear platforms by screwing the bolts 143 arranged with the plain washers 144 interposed in the through holes 117 of the band fixing portion 116 to the female screws FS of the front and rear platforms. According to this embodiment, the above-described effects such as shortening of bolts can be achieved, and the tank can be fixed in a separate process before the tank is mounted on the vehicle, thereby reducing work load and improving workability. Effectiveness can be increased.

  FIG. 10 is a view corresponding to FIG. 1, and is an explanatory view showing an on-vehicle state of the high-pressure tank T in the vehicle 10 </ b> C using the band holding mechanism 200. In this embodiment, the tank subframe TSF with the tank already described is installed under the floor in the center of the vehicle, and the tank subframe TSF is fixed to the front platform FL and the central part platform FM from the vehicle lower side. Yes. Even in this embodiment, the above-described effects such as shortening the bolt can be obtained.

  Next, an embodiment of a mode in which the high-pressure tank T is fixed by a plurality of belts that are stretched around the tank will be described. FIG. 11 is a view corresponding to FIG. 1, and is an explanatory view showing the state of mounting the high-pressure tank T in the vehicle 10D when the band holding mechanism 200 is provided at the end of the band. FIG. 12 is a view corresponding to FIG. FIG. 4 is an explanatory diagram showing how a tank T is held. In this embodiment, for example, the sub-frame SM is disposed on the front and rear of the vehicle on the steering frame SF on the rear wheel RT side, and the high-pressure tank T is held and fixed between the front and rear sub-frames.

  In this embodiment, as shown in FIG. 12, when the high-pressure tank T is fixed between the front and rear subframes, the lower end tank band 160 spanned across the lower end side of the tank and the tank band on the upper end side of the tank. 165 and a tank band 140. The lower end tank band 160 has thick fixed ends 161 and 162 which are fixed by placing both ends of the tank on the band fixing base SMD on the upper surface of the subframe SM, and each fixed end has a through-hole into which a bolt 143 is inserted. . The tank band 165 has a band length that spans about a quarter of the circumference of the upper end side of the high-pressure tank T. One end of the band is a thick fixed end 166 that overlaps the fixed end 162 of the lower end tank band 160. A through hole into which the bolt 143 is inserted is provided at the fixed end. The tank band 165 has the other end side of the band as a thick band holding end 167 for holding the tank band 140, and has a through hole into which the bolt 202 of the band holding mechanism 200 is inserted. The tank band 140 has the above-described configuration except that the tank band 140 has a band length spanning about a quarter of the circumference at the upper end side of the high-pressure tank T. The first fixed end 141 has the above-described configuration. The bolt 202 is fixed to the sub-frame SM by being screwed onto the female screw of the band fixing base SMD. The band holding mechanism 200 described above is assembled to the second fixed end 142 of the tank band 140.

  With respect to the tank band 165 and the tank band 140 that are hung on the upper side of the high-pressure tank T, it is desirable to provide reinforcing ribs 168 at both ends of the band in order to fix the high-pressure tank T with the band hung around the periphery. Further, when the tank band 140 is held with respect to the subframe SM, the bolt 202 is screwed into the female screw of the subframe SM, but the bolt is inserted into the through hole provided in the band fixing base SMD of the subframe SM. It is also possible to insert 202 and screw the nut 203 into the bolt 202. When the nut 203 is used, the nut 203 can be welded to the band fixing base SMD so that the female screw hole of the nut 203 overlaps the through hole of the band fixing base SMD.

  In this embodiment, a nut 203 is screwed at a band holding end 167 of a tank band 165 to a bolt 202 inserted into the tubular body 210 or the second fixed end 142 of the band holding mechanism 200. By doing so, the high-pressure tank T can be fixed by applying a tension to the tank band 140 by the band holding mechanism 200 and holding the same as in the embodiment described above. And effects, such as bolt shortening, can be produced.

  The band holding mechanism 200, the tank band 140, and the tank band 165 shown in FIG. 12 can be combined with the tank storage recess 110 in the embodiment described above. That is, instead of the lower end tank band 160 and the front and rear subframes SM shown in FIG. 12, the platform F having the tank storage recess 110 and the tank subframe TSF are used, and the tank storage recess 110 shown in FIGS. It is also possible to fix the fixed end 166 of the tank band 165 and the first fixed end 141 of the tank band 140 to the band fixing portions 116 on both sides thereof by the first fixed end 141.

  As mentioned above, although the Example of this invention was described, this invention is not restricted to above-described embodiment, In the range which does not deviate from the summary, it is possible to implement in various aspects. For example, in the embodiment described above with reference to FIG. 12, two bands on the upper end side of the tank and a tank band 165 on the lower end side of the tank are used. However, one band can also be formed on the upper end side of the tank. FIG. 13 is an explanatory view showing a modified example in which the high-pressure tank T is held by a band extending from the lower end side to the upper end side of the tank. As shown in the figure, in this modification, the tank band 140 is set to a band length that extends over the upper half of the tank, and the second fixed end 142 of the tank band 140 is connected to the fixed end 162 of the lower tank band 160. The tank band 140 is tensioned and held in the subframe SM by the band holding mechanism 200. When the tank band 140 is held with respect to the subframe SM in this way, as described above, the bolt 202 is screwed into the female screw of the subframe SM or is inserted into the through hole of the band fixing base SMD of the subframe SM. A nut 203 is screwed into the inserted bolt 202.

  Moreover, although the nut 203 was welded to the upper surface side of the bottom part 211 in FIG. 4 and the aspect of the cylindrical body 210 integral with a nut was shown, it can also be as follows. FIG. 14 is a perspective view schematically showing a modified cylindrical body 210A. As shown in the figure, this cylindrical body 210A is provided with a bolt head of a hexagon bolt 202A welded to the lower surface side of the bottom portion 211, that is, the band surface side, on the top surface of the head. According to the cylindrical body 210A of this modification, since the hexagon bolt 202A can be handled together with the cylindrical body, assembly work such as bolt insertion into the through hole after the coil spring 204 is disposed becomes simple.

  The cylindrical body 210 </ b> A shown in FIG. 14 may come off from the welding location on the top surface of the bolt head when an external force is applied. However, even when the hexagon bolt 202A is detached from the cylindrical peripheral wall portion 213 in the cylindrical body 210A, the hexagon bolt 202A and the nut 203 are screwed (see FIG. 3) or the female screw FS of the band fixing portion 116 is screwed (see FIG. 3). Is maintained). For this reason, the tank band 140 does not come off from the band fixing part 116. On the other hand, in an existing structure in which the coil spring 204 is held only by a bolt without using a cylindrical body, if a long bolt is damaged by an external force, the band is detached from the tank. Therefore, according to the cylindrical body 210A shown in FIG. 14, it is possible to avoid releasing the high-pressure tank T by holding the tank band 140 even when a large external force is applied.

  Further, in the above-described embodiment, the cylindrical body 210 has the simple cylindrical peripheral wall portion 213, but can be modified as follows. FIG. 15 is a perspective view showing a tubular body 210B of another modification.

  As shown in the figure, the cylindrical body 210B includes a bottom portion 211, a through hole 212, an opening outer edge 214, and an outer edge edge portion 215, like the cylindrical body 210 described above, but the cylindrical peripheral wall portion 213 includes a window. 216. Even in this cylindrical body 210B, it is inserted into the coil spring 204 in the same manner as the cylindrical body 210 and the other end side of the coil spring 204 is received by the opening outer edge 214, but the strength of the cylindrical peripheral wall portion 213 is increased by the amount of the window 216. It is low. Therefore, when the band is held by the band holding mechanism 200 using the cylindrical body 210B of this modification, the cylindrical body 210B is easily broken at the cylindrical peripheral wall portion 213 due to an external force applied for some reason. And the fracture | rupture condition with respect to external force can also be adjusted by adjusting the magnitude | size of the window 216. FIG. In other words, if the size of the window 216 is adjusted to an external force that is expected to be applied due to sudden braking of the vehicle, the cylindrical body 210B can be used only when an external force that exceeds this expectation is applied. It can be made to break. Even if the tubular body 210B is broken in this way, the tank band 140 is held on the platform F or the like by the bolt 202 as described above, so that the high-pressure tank T can be prevented from falling off. In addition, the cylindrical body 210 can be reduced in weight by the amount of the window 216 provided. Instead of adjusting the size of the window 216, the thickness of the cylindrical peripheral wall portion 213 that does not have the window 216 can be adjusted to adjust the breaking state of the cylindrical peripheral wall portion 213 with respect to external force.

  In addition, although any of the above-described cylindrical bodies is connected to the opening outer edge 214 and has the outer edge edge portion 215, it can be a cylindrical body having the opening outer edge 214 without the outer edge edge portion 215. The object to be fixed by the band is not limited to the tank.

It is explanatory drawing which shows typically the vehicle-mounted aspect of the high-pressure tank T at the time of applying the fixing structure as an Example of this invention to the vehicle equipped with a high-pressure tank. It is explanatory drawing which shows the vehicle-mounted aspect of the high pressure tank T with the structure of a tank periphery. It is explanatory drawing which cut | disconnects the principal part and shows the mode of holding | maintenance of the vehicle-mounted high-pressure tank T. FIG. FIG. 4 is an explanatory view showing a band holding mechanism 200 in which the arrangement of bolts 202 and nuts 203 is reversed, corresponding to FIG. 3. FIG. 4 is an explanatory view showing a band holding mechanism 200 corresponding to FIG. 3 and in which a bolt 202 is screwed directly to a platform F. FIG. 2 is an explanatory view schematically showing the state of mounting the high-pressure tank T in the vehicle 10 </ b> A using the band holding mechanism 200, corresponding to FIG. 1. FIG. 2 is an explanatory diagram schematically showing the on-vehicle state of the high-pressure tank T in the vehicle 10 </ b> B using the band holding mechanism 200, corresponding to FIG. 1. FIG. 3 is a view corresponding to FIG. 2, and is an explanatory view showing the state of the high-pressure tank T mounted on the vehicle together with the configuration around the tank. FIG. 4 is an explanatory view corresponding to FIG. 3 and showing a state in which a high-pressure tank T mounted on a vehicle is held with a main part broken. FIG. 2 is an explanatory view schematically showing the on-vehicle state of the high-pressure tank T in the vehicle 10 </ b> C using the band holding mechanism 200, corresponding to FIG. 1. FIG. 2 is an explanatory view schematically showing the on-vehicle state of the high-pressure tank T in the vehicle 10 </ b> D when the band holding mechanism 200 is provided at the end of the band, corresponding to FIG. 1. FIG. 4 is an explanatory view showing a state of holding the high-pressure tank T mounted on the vehicle, corresponding to FIG. 3. It is explanatory drawing which shows the modification which hold | maintains the high pressure tank T with the band spanned between the tank lower end side and the upper end side. It is a perspective view which shows roughly the cylindrical body 210A of a modification. It is a perspective view which shows the cylindrical body 210B of another modification.

DESCRIPTION OF SYMBOLS 10, 10A-10D ... Vehicle 110 ... Tank storage recess 112F ... Front inclined surface 112R ... Back inclined surface 114 ... Recessed groove 116 ... Band fixing | fixed part 117 ... Through-hole 140 ... Tank band 141 ... 1st fixed end 141a ... Through-hole 142 ... second fixed end 142a ... through hole 143 ... bolt 144 ... flat washer 160 ... lower end tank band 161 ... fixed end 162 ... fixed end 165 ... tank band 166 ... fixed end 167 ... band holding end 168 ... reinforcing rib 200 ... band Holding mechanism 202 ... Bolt 202A ... Hex bolt 203 ... Nut 204 ... Coil spring 205 ... Flat washer 210 ... Cylindrical body 210A ... Cylindrical body 210B ... Cylindrical body 211 ... Bottom part 212 ... Through-hole 213 ... Cylindrical wall part 214 ... Opening edge 215 ... outer edge 216 ... window T ... high pressure tank F ... platform SF ... steering frame FL ... front platform FM ... center part platform FR ... rear platform SM ... subframe FS ... female screw FH ... through hole RT ... rear wheel SMD ... band fixing base TVB ... valve base TSF ... tank subframe

Claims (9)

A fixing structure for fixing the fixed object by holding a fixed end of a band-shaped band spanned on the outer periphery of the cylindrical fixed object on a band holding part,
A bolt inserted into a band side through hole at the fixed end of the band and a holding part side through hole of the band holding part;
A nut screwed into the male thread of the bolt;
A coil spring;
A bottomed tubular body having an outer diameter smaller than the coil diameter of the coil spring, the tubular body having an opening outer edge extending outward on the opening side;
The coil spring overlaps with the band through hole and is arranged in contact with one end side of the spring on the surface of the band,
The cylindrical body is inserted into the coil spring, and the other end side of the coil spring is received at the outer edge of the opening in a state where the bottom portion of the cylindrical body is separated from the surface of the band.
The bolt and the nut inserted into the band side through hole and the holding part side through hole pull the bottom portion of the cylindrical body toward the band surface side by screwing the male screw and the nut. A fixing structure in which the coil spring is compressed between the surface of the band and the outer edge of the opening, and the band is held under tension by the compressed coil spring.   The cylindrical body includes a bottom through hole at the bottom, the bolt is also inserted into the bottom through hole, and a bolt head or a nut is disposed on the upper surface side of the bottom that contacts the inside of the cylindrical body. The fixing structure according to claim 1.   3. The bolt in which the bolt head is disposed on the upper surface side of the bottom portion, and the bolt head is disposed on the upper surface side of the bottom portion with a washer disposed to overlap the bottom through hole. Fixed structure as described.   The fixing structure according to claim 2, wherein the nut disposed on the upper surface side of the bottom portion is welded to the upper surface side of the bottom portion with a female screw hole superimposed on the bottom through hole.   The fixing structure according to claim 1, wherein the cylindrical body is integrated with the bolt by welding the bottom portion to a top surface of a bolt head of the bolt.   2. The cylindrical body according to claim 1, wherein a bottom through-hole provided in the bottom portion is overlapped with a female screw hole of the nut and the bottom portion is welded to a top surface of the nut to be integrated with the nut. Fixed structure.   The fixing structure according to any one of claims 1 to 6, wherein the band holding portion is formed at a fixed end of another band-shaped band spanned over the fixed object. A fixing structure for fixing the object to be fixed with a band-shaped band that extends around the outer periphery of the cylindrical object to be fixed,
A band holding part that includes a female screw and holds the fixed end of the band;
A bolt having a male screw inserted into a band-side through hole at the fixed end of the band and screwed into the female screw of the band holding portion;
A coil spring;
A bottomed tubular body having an outer diameter smaller than the coil diameter of the coil spring, the tubular body having an opening outer edge extending outward on the opening side;
The coil spring overlaps with the band through hole and is arranged in contact with one end side of the spring on the surface of the band,
The cylindrical body is inserted into the coil spring, and the other end side of the coil spring is received at the outer edge of the opening in a state where the bottom portion of the cylindrical body is separated from the surface of the band.
The bolt inserted into the band side through-hole pulls the bottom portion of the cylindrical body toward the band surface side by screwing the band holding portion to the female screw, and the band surface and the opening outer edge. A fixing structure for fixing the object to be fixed by putting the coil spring in a compressed state between the coil spring and holding the band under tension by the compressed coil spring.   The fixing structure according to claim 1, wherein the fixed part is a high-pressure tank.

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