Can holding structure

Abstract

Provided is a can holding structure capable of preventing a buffer member from falling out of a frame member. The can holding structure (1) includes: a frame member (10) having a recess portion that supports a cylindrical can (2) and provided with engagement holes (16, 17) in side walls (12, 13) of the recess portion; a can band (20) disposed opposite the frame member (10) and configured to press the can (2) toward the frame member (10); a force applying member (30) that imparts a pressing force on the can band (20) toward the can (2); and a buffer member (40) disposed between the can (2) and the frame member (10) and engaged with the engagement holes (16, 17). A sliding member (50) is interposed between the can (2) and the buffer member (40).

Description

TECHNICAL FIELD

[0001] The present application relates to a tank holding structure. BACKGROUND

[0002] In the case of installing a gas tank to a vehicle or the like, from the viewpoint of firmness and quietness, a holding member and a buffer are used to hold the tank. For example, a tank holding structure is disclosed in Patent Literature 1, which has a holding member composed of two fixing plates that sandwich both end portions of the tank and a linking member that links the fixing plates, and a buffer that is sandwiched between the holding member and the end portions of the tank.

[0003] Patent Literature 1: Japanese Patent Application Laid-Open No. 2005-225477

[0004] Recently, in order to cope with the elongation of the tank accompanying the increase in the gas storage amount, a structure is employed in which the end portion of the tank on which a main stop valve is mounted is held in a neck mounting manner using a frame member and a tank strap. Moreover, in order to prevent abnormal noise and vibration that occur when the main stop valve is opened, a buffer is disposed between the frame member and the tank. The buffer has an engagement claw that engages with an engagement hole provided in the frame member, and is fixed to the frame member by engaging the engagement claw with the engagement hole.

[0005] However, since the tank expands and elongates in its axial direction due to gas filling, positional displacement of the buffer with respect to the frame member occurs. If the positional displacement becomes large, there is a possibility that the buffer is pressed and bent to fall out of the engagement hole of the frame member. SUMMARY

[0006] The present application has been achieved in order to solve such a technical problem, and has an object to provide a tank holding structure capable of preventing a buffer from falling out of an engagement hole of a frame member.

[0007] The tank holding structure according to the present application is a tank holding structure for holding a tank that is a circular cylinder, characterized by comprising: a frame member having a recess portion that supports the tank, and an engagement hole provided in a side wall of the recess portion; a tank strap disposed opposite to the frame member and formed so as to be able to press the tank toward the frame member; an urging member that imparts a pressing force of the tank to the tank strap; and a buffer disposed between the tank and the frame member and engaged with the engagement hole, a sliding member being sandwiched between the tank and the buffer.

[0008] In the tank holding structure according to the present application, since the sliding member is sandwiched between the tank and the buffer, the sliding member can be used to reduce the frictional force that occurs between the tank and the buffer. As a result, it is possible to prevent the buffer from falling out of the engagement hole of the frame member.

[0009] In the can holding structure according to the present invention, it is preferable that the buffer member has a block-shaped buffer member body and a pair of engaging claws protruding from the buffer member body and capable of engaging with the engaging hole. When the axial direction of the can is defined as the length direction of the buffer member, the circumferential direction of the can is defined as the width direction of the buffer member, and the radial direction of the can is defined as the thickness direction of the buffer member, and the thickness of the portion of the engaging claws in the buffer member body between each other is defined as h, the width of the portion of the engaging claws in the buffer member body between each other is defined as b, the length of the portion of the engaging claws in the buffer member between each other is defined as l, the longitudinal elastic coefficient of the buffer member is defined as E, the coefficient of friction between the can and the buffer member is defined as μ, pi is defined as π, and the maximum compressive force acting on the buffer member from the can when the can is full is defined as N. max And through F fmax =μN max To determine the maximum frictional force F generated between the aforementioned tank and the aforementioned buffer component. fmax At that time, the aforementioned slippery component is set to satisfy F fmax <(h) 3 bEπ 2 / 6l 2 This reduces the friction between the tank and the buffer, thus preventing the buffer from falling out of the locking holes in the frame components.

[0010] In the can holding device according to the present invention, the aforementioned slippery component is preferably a sheet formed of polytetrafluoroethylene (PTFE) or polyethylene terephthalate (PET). Since PTFE or PET has a relatively low coefficient of friction, the frictional force generated between the can and the buffer component can be reduced. Therefore, it is possible to prevent the buffer component from falling out of the locking hole of the frame component.

[0011] Furthermore, in the can-holding structure according to the present invention, it is preferable that the aforementioned slippery component is a rubber layer formed on the surface of the aforementioned cushioning member and comprising resin particles or fibers with a low coefficient of friction. This reduces the frictional force generated between the can and the cushioning member, thus preventing the cushioning member from detaching from the locking hole of the frame member.

[0012] Furthermore, in the can holding structure according to the present invention, it is preferable that the aforementioned slip member is a layer formed by performing a high-density treatment or a high-hardness treatment on the surface of the aforementioned buffer member. In this way, since the frictional force generated between the can and the buffer member can be reduced, it is possible to prevent the buffer member from falling off the locking hole of the frame member.

[0013] Further, in the can holding structure according to the present application, it is preferable that the sliding member be a fiber reinforced resin layer formed by winding a resin fiber having a low coefficient of friction impregnated with a base resin around the outer circumferential surface of the can. In this way, since the frictional force generated between the can and the cushion member can be reduced, the cushion member can be prevented from falling out of the engagement hole of the frame member.

[0014] Further, in the can holding structure according to the present application, it is preferable that the sliding member be a fiber reinforced resin layer formed by winding a resin fiber having a low coefficient of friction impregnated with a base resin around the outer circumferential surface of the can. In this way, since the frictional force generated between the can and the cushion member can be reduced, the cushion member can be prevented from falling out of the engagement hole of the frame member.

[0015] According to the present application, the cushion member can be prevented from falling out of the engagement hole of the frame member. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a front view showing the can holding structure according to the first embodiment.

[0017] Figure 2 is a sectional view taken along the line A-A of Figure 1 .

[0018] Figure 3 is a sectional view taken along the line B-B of Figure 2 .

[0019] Figure 4 is a sectional view for explaining a problem point of the conventional can holding structure.

[0020] Figure 5 is a sectional view showing the cushion member.

[0021] Figure 6 is a sectional view showing the cushion member.

[0022] Figure 7 is a partial sectional view showing the can holding structure according to the second embodiment.

[0023] Figure 8 is a partial sectional view showing the can holding structure according to the third embodiment.

[0024] Figure 9 is a partial sectional view showing the can holding structure according to the fourth embodiment.

[0025] Figure 10 is a front view showing the can holding structure according to the fifth embodiment.

[0026] Figure 11 is a sectional view taken along the line A-A of Figure 10A cross-sectional view of the D-D line.

[0027] Figure 12 This is a partial cross-sectional view showing the tank holding structure according to the sixth embodiment.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1…Can holding structure; 2…Can; 3…Liner; 4…Reinforcing layer; 5…Metal port; 6…Main check valve; 7…Neck-mounted holding structure; 8…Bolt; 10…Frame component; 11…Base plate; 12, 13…Side walls; 14, 15…Flanges; 16, 17…Engaging holes; 20…Can belt; 21…Base end; 22…Bend; 23…Force-applying component connection; 24…Through hole; 30…Force-applying component; 31…Bolt; 32…Receiving component; 33…Helical spring; 34…Nut; 35…Head; 40…Buffer; 41…Buffer body; 42…Engaging claw; 43…Central part; 44…Protrusion; 50-55…Slippery component. Detailed Implementation

[0030] Hereinafter, embodiments of the can holding structure according to the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are used to label the same elements, and repeated descriptions are omitted. In addition, in the following description, the up-down and left-right directions are convenient directions corresponding to the states shown in the drawings, and do not limit the posture or configuration of the can holding structure.

[0031] [First Implementation]

[0032] Figure 1 This is a front view showing the tank holding structure according to the first embodiment. Figure 2 It is along Figure 1 A sectional view of line A-A. Figure 3 It is along Figure 2 A cross-sectional view along line B-B. The tank holding structure 1 of this embodiment is used, for example, to hold a tank 2 mounted on a fuel cell vehicle (not shown) and to fix the tank 2 to the body of the fuel cell vehicle.

[0033] Tank 2 is, for example, a hydrogen tank for storing high-pressure hydrogen, which is a cylindrical container with dome-shaped rounded corners at both ends. Tank 2 includes: a liner 3 having a storage space for storing hydrogen gas; a reinforcing layer 4 configured to be in close contact with the outer peripheral surface of the liner 3; and metal openings 5 ​​installed at both ends of the liner 3.

[0034] The lining 3 is formed, for example, of a resin material that provides a gas barrier against hydrogen. Examples of resin materials include polyamide, polyethylene, ethylene-vinyl alcohol copolymer (EVOH), thermoplastic resins such as polyester, and thermosetting resins such as epoxy resins. For example, the reinforcing layer 4 is formed by winding fibers impregnated with a thermosetting resin multiple times around the outer periphery of the lining 3. The fibers are, for example, formed of a composite material whose strength is increased by incorporating carbon fiber, glass fiber, aramid fiber, etc., into the plastic.

[0035] Metal opening 5 is formed, for example, from a metallic material such as aluminum. Figure 1 As shown, a main check valve 6 is installed on one of the metal ports 5 located at the left and right ends of the liner 3. If the main check valve 6 is opened, the high-pressure hydrogen stored in the tank 2 is depressurized by a pressure reducing valve (not shown) and supplied to the fuel cell stack (not shown).

[0036] The tank 2 with such a structure is held by a neck-mounted holding structure 7 at the metal port 5 where the main check valve 6 is installed, and is held by a tank holding structure 1 near the metal port 5 where the main check valve 6 is not installed.

[0037] The can holding structure 1 includes: a frame member 10 supporting the can 2; a can belt 20 disposed opposite to the frame member 10 and pressing the can 2 toward the frame member 10; a force-applying member 30 applying pressure to the can belt 20 toward the can 2; and a buffer member 40 disposed between the can 2 and the frame member 10.

[0038] Frame component 10, for example, is a component that forms part of the body of a fuel cell vehicle and is made of a metallic material. Figure 2 As shown, the frame component 10 is disposed at the lower part of the tank 2, for example, in a manner that supports the tank 2 from below, and is in the shape of a cap that opens upwards.

[0039] Specifically, the frame component 10 has a base plate 11, a pair of sidewalls 12 and 13 extending obliquely upward from both ends of the base plate 11, and a pair of flanges 14 and 15 bent from the upper ends of the sidewalls 12 and 13 to be parallel to the base plate 11. Engaging holes 16 are provided in the sidewalls 12 and 17 are provided in the sidewalls 13. Furthermore, the sidewalls 12, the base plate 11, and the sidewalls 13 form a recess for supporting the tank 2. For example, the frame component 10 with this structure is formed by punching holes in a metal plate at predetermined positions.

[0040] The can strap 20 is formed into a strip shape, for example, from stainless steel, which has excellent strength and elastic deformation, and is disposed on the opposite side of the frame member 10 in a manner that presses against the upper side of the can 2. The can strap 20 has: a base end 21, fixed to the flange 14 of the frame member 10; a bent portion 22, extending from the base end 21 and bent in accordance with the outer peripheral shape of the can 2; and a force-applying member connecting portion 23, one end of which is fixed to the bent portion 22, and the other end of which is connected to the force-applying member 30, and has an L-shaped cross-section. The base end 21 of the can strap 20 is fixed to the flange 14 of the frame member 10 by bolts 8. A through hole 24 is formed in the force-applying member connecting portion 23. Furthermore, the material used for the can strap 20, besides stainless steel, can also be other metal materials with excellent strength and elastic deformation.

[0041] The force-applying component 30 includes a bolt 31, a receiving component 32, a coil spring 33, and a nut 34. The bolt 31 is inserted through a through hole 24 formed in the force-applying component connecting portion 23 of the can belt 20, screwed into a threaded hole formed in the flange portion 15 of the frame component 10, and then screwed into the nut 34. The receiving component 32 is disposed between the head 35 of the bolt 31 and the force-applying component connecting portion 23. The inner diameter of the receiving component 32 is smaller than the outer diameter of the head 35 of the bolt 31. This prevents the receiving component 32 from falling off the bolt 31. The diameter of the through hole 24 formed in the force-applying component connecting portion 23 of the can belt 20 is such that the force-applying component connecting portion 23 can slide axially along the bolt 31.

[0042] A coil spring 33 is positioned between the receiving member 32 and the force-applying member connection 23 of the can belt 20 with a bolt 31 inserted inside it. The coil spring 33 applies force to the force-applying member connection 23 towards the frame member 10. As a result, the can belt 20 generates a pressing force that presses the can 2 towards the frame member 10.

[0043] The buffer 40 is a component used to prevent abnormal noise, suppress vibration, and absorb impact. More specifically, when the main check valve 6 opens, the high-pressure hydrogen in the tank 2 flows suddenly through the flow path of the main check valve 6, generating abnormal noise and vibration accompanied by shock waves. If this abnormal noise and vibration are transmitted to the vehicle body via the tank 2 and the frame component 10, it can sometimes produce loud noise. To prevent abnormal noise and suppress vibration, a buffer 40 needs to be installed between the tank 2 and the frame component 10. In addition, when the fuel cell vehicle is driving on a rough road, there are situations where the tank 2 experiences a large impact. To protect the tank 2 from such impacts, a buffer 40 is also required between the tank 2 and the frame component 10.

[0044] The buffer member 40 has a block-shaped buffer member body 41 and a pair of engaging claws 42 protruding from the buffer member body 41 and capable of engaging with engaging holes 16, 17 of the frame member 10. The buffer member 40 is fixed to the frame member 10 by engaging the engaging claws 42 with the engaging holes 16, 17. Preferably, the buffer member 40 is formed of a vibration-damping material such as rubber or an elastomer. In this embodiment, the buffer member 40 is formed of rubber.

[0045] Here, the background of the present invention will be explained.

[0046] If hydrogen is filled into the container, it will expand both axially and radially. The axial expansion is the largest. Figure 4 As shown, tank 2 elongates axially due to this axial expansion (in Figure 4 (Extending to the left from the center). Furthermore, in the case of fuel cell vehicles, it is required that their driving range be ensured to be at least 800km, equivalent to that of internal combustion engine vehicles. To increase the hydrogen storage capacity, methods such as lengthening the tank 2 are employed. However, with the lengthening of tank 2, the expansion of tank 2 due to gas filling also increases, and the elongation of tank 2 also increases. For example, if a 1.5m long tank 2 is filled with hydrogen, tank 2 will elongate by approximately 5mm.

[0047] Furthermore, due to the elongation of tank 2, a positional shift occurs between tank 2 and buffer member 40, resulting in a frictional force F between them. f Frictional force F f It is calculated using the following formula (1).

[0048] F f =μN (1)

[0049] In equation (1), μ is the coefficient of friction between the tank 2 and the buffer 40, and N is the compressive force exerted by the tank 2 on the buffer 40. The compressive force N exerted by the tank 2 on the buffer 40 mainly depends on the pressing force from the tank belt 20 to the tank 2, the weight of the tank 2, the weight of the hydrogen being filled, and the radial expansion of the tank 2. Among these, the compressive force N exerted by the tank on the buffer is the largest when the tank 2 is full (i.e., when the tank 2 is at its most extended). max At this time, the frictional force F between tank 2 and buffer 40 is... f It is also the maximum (becoming the maximum frictional force F) fmax ).

[0050] Furthermore, along with the positional shift between the tank 2 and the buffer 40, a positional shift will also occur between the frame component 10 and the buffer 40. Moreover, if the frictional force F... f If it becomes larger, then it is like Figure 4As shown, there is a possibility that the buffer body 41 may be bent and the locking claw 42 may fall off from the locking holes 16 and 17 provided on the frame component 10.

[0051] In view of this, the inventors of this application have conducted in-depth research and discovered that by clamping a sliding component 50 between the can 2 and the buffer 40, the sliding properties between the can 2 and the buffer 40 are improved, and the frictional force F generated between the can 2 and the buffer 40 is reduced. f This prevents the buffer 40 from falling out of the engagement holes 16 and 17 of the frame component 10, thereby realizing the present invention.

[0052] Therefore, in this embodiment, a sliding member 50 is sandwiched between the tank 2 and the buffer member 40. Moreover, the sliding member 50 is configured to satisfy the following relationship.

[0053] That is, when the direction along the axial direction of the tank 2 is defined as the length direction of the buffer member 40, the direction along the circumference of the tank 2 is defined as the width direction of the buffer member 40, and the direction along the radial direction of the tank 2 is defined as the thickness direction of the buffer member 40, such as Figure 5 As shown, when the thickness of the central portion 43 between the engaging claws 42 and 2 in the buffer body 41 is set as h, the width of the central portion 43 is set as b, the length of the central portion 43 is set as l, the longitudinal elastic coefficient of the buffer 40 is set as E, the coefficient of friction between the can 2 and the buffer 40 is set as μ, pi is set as π, and the maximum compressive force exerted by the can 2 on the buffer 40 when the can 2 is full is set as N. max And through F fmax =μN max The maximum frictional force F generated between tank 2 and buffer 40 was determined. fmax At that time, the sliding component 50 is set to satisfy the relationship of the following equation (2). Wherein, in Figure 5 In the middle, the sectional view on the left is along... Figure 2 The right-hand sectional view is a cross-sectional view along line B-B, and the right-hand sectional view is a cross-sectional view along line C-C in the left-hand sectional view.

[0054] F fmax <(h) 3 bEπ 2 / 6l 2 (2)

[0055] Therefore, for example, by means of the selection of the material or adjustment of the structure of the sliding member 50 clamped between the tank 2 and the buffer member 40, the frictional force F generated between the tank 2 and the buffer member 40 can be reduced. f The reduction is to satisfy the relationship of equation (2), which can prevent the buffer 40 from falling off from the engagement holes 16, 17 of the frame component 10.

[0056] Therefore, the slippery component 50 in this embodiment is composed of a component having a friction force F. f The material has a low coefficient of friction. More specifically, the slippery part 50 is formed of polytetrafluoroethylene (PTFE) or polyethylene terephthalate (PET) with a relatively low coefficient of friction, for example, formed as a sheet with the same size as the contact area between the buffer 40 and the can 2.

[0057] In this can holding structure 1, since a sliding component 50 is sandwiched between the can 2 and the buffer 40, the sliding component 50 can be used to reduce the frictional force F generated between the can 2 and the buffer 40 when the can 2 extends. f As a result, the bending of the buffer body 41 is suppressed, and the buffer 40 is prevented from falling out of the engagement holes 16, 17 of the frame component 10.

[0058] Furthermore, the slippery component 50 of this embodiment is not limited to being formed of the aforementioned polytetrafluoroethylene (PTFE) or polyethylene terephthalate (PET), but may also be formed of other materials with a low coefficient of friction.

[0059] Furthermore, by selecting the friction force F between the tank 2 and the buffer 40 based on the above formula (2), f The material has a low coefficient of friction, and the thickness h of the central portion 43 is increased (refer to...). Figure 6 Alternatively, the width b of the central portion 43 can be increased, or the length l of the central portion 43 can be reduced, to prevent the buffer 40 from falling off the locking holes 16 and 17 of the frame component 10.

[0060] [Second Implementation]

[0061] The can holding structure 1 of the second embodiment differs from that of the first embodiment described above in the composition of the lubricating component. Hereinafter, only this difference will be described.

[0062] Specifically, such as Figure 7 As shown, the slippery component 51 is part of the buffer 40 and is a rubber layer formed on the surface of the buffer 40, comprising resin particles or fibers with a low coefficient of friction. Examples of resin particles with a low coefficient of friction include high-density polyethylene (HDPE) resin particles. Examples of fibers with a low coefficient of friction include polyester, polyamide, and polyolefin fibers.

[0063] According to the can holding structure 1 equipped with such a slippery component 51, similar to the first embodiment described above, the frictional force generated between the can 2 and the buffer 40 can be reduced, and the buffer 40 can be prevented from falling off from the engagement holes 16, 17 of the frame component 10. Furthermore, in this embodiment, the buffer 40 can also be formed entirely of high-density polyethylene (HDPE) resin or the like.

[0064] [Third Implementation]

[0065] The can holding structure 1 of the third embodiment differs from that of the first embodiment described above in the composition of the lubricating component. Hereinafter, only this difference will be described.

[0066] Specifically, such as Figure 8 As shown, the slippery component 52 is part of the buffer 40 and is a layer formed by performing a high-density treatment on the surface of the buffer 40. That is, the slippery component 52 is the surface of the buffer 40 that contacts the can 2, and becomes a high-density layer. The high-density treatment increases the surface density of the buffer 40, for example, by increasing the carbon ratio and the ratio of inorganic fillers such as silica.

[0067] According to the can holding structure 1 with such a slippery component 52, similar to the first embodiment described above, the frictional force generated between the can 2 and the buffer 40 can be reduced, and the buffer 40 can be prevented from falling off from the engagement holes 16, 17 of the frame component 10.

[0068] [Fourth Implementation]

[0069] The can holding structure 1 of the fourth embodiment differs from that of the first embodiment described above in the construction of the lubricating component. Hereinafter, only this difference will be described.

[0070] Specifically, such as Figure 9 As shown, the slippery component 53 is part of the buffer 40 and is a layer formed by subjecting the surface of the buffer 40 to a high-hardness treatment. That is, the slippery component 53 is the surface of the buffer 40 that contacts the can 2, and becomes a high-hardness layer. The high-hardness treatment is performed, for example, by increasing the crosslinking density, adding polyolefin resin, or phenolic resin to increase the surface hardness of the buffer 40.

[0071] According to the can holding structure 1 with such a slippery component 53, similar to the first embodiment described above, the frictional force generated between the can 2 and the buffer 40 can be reduced, and the buffer 40 can be prevented from falling off from the engagement holes 16, 17 of the frame component 10.

[0072] [Fifth Implementation]

[0073] The can holding structure 1 of the fifth embodiment differs from that of the first embodiment described above in the construction of the lubricating component. Hereinafter, only this difference will be described.

[0074] Specifically, such as Figure 10 as well as Figure 11 As shown, the slippery component 54 is a fiber-reinforced resin layer formed by winding low-friction resin fibers impregnated with a matrix resin around the outer peripheral surface of the can 2. Specifically, for example, it is formed by winding low-friction resin fibers such as high-strength polyethylene impregnated with a matrix resin such as epoxy resin only around the outer peripheral surface of the can 2 corresponding to the portion that contacts the can 2 and the buffer member 40.

[0075] According to the can holding structure 1 with such a slippery component 54, similar to the first embodiment described above, the frictional force generated between the can 2 and the buffer 40 can be reduced, and the buffer 40 can be prevented from falling off from the engagement holes 16, 17 of the frame component 10.

[0076] [Sixth Implementation]

[0077] The can holding structure 1 of the sixth embodiment differs from that of the first embodiment described above in the configuration of the lubricating component. Hereinafter, only this difference will be described.

[0078] Specifically, such as Figure 12 As shown, the slip member 55 is a roller disposed between the tank 2 and the buffer member 40, capable of rotating along the axial direction of the tank 2. The material of the slip member 55 is, for example, rubber or resin. In this case, protrusions 44 for preventing the slip member 55 from disengaging are formed at both ends of the upper surface of the buffer member body 41.

[0079] According to the can holding structure 1 with such a sliding member 55, the friction between the can 2 and the buffer member 40 can be reduced by the sliding member 55 rotating in accordance with the elongation of the can 2, thereby preventing the buffer member 40 from falling off from the engagement holes 16, 17 of the frame member 10.

[0080] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the above embodiments. Various design changes can be made without departing from the spirit and scope of the present invention as described in the technical solution.

Claims

1. A can holding structure for holding a cylindrical can, characterized in that, have: The frame component has a recess for supporting the tank, and a locking hole is provided on the side wall of the recess; The can strap is disposed opposite to the frame component and is configured to press the can toward the frame component; The force-applying component applies a pressing force to the can belt towards the can; and A buffer element is disposed between the tank and the frame component and engages with the engaging hole. A sliding component is sandwiched between the can and the buffer component. The buffer has a block-shaped buffer body and a pair of engaging claws protruding from the buffer body and capable of engaging with the engaging hole. When the direction along the axial direction of the can is defined as the length direction of the buffer, the direction along the circumference of the can is defined as the width direction of the buffer, and the direction along the radial direction of the can is defined as the thickness direction of the buffer, When the thickness of the portion of the engaging claws in the buffer body is set to h, the width of the portion of the engaging claws in the buffer body is set to b, the length of the portion of the engaging claws in the buffer is set to l, the longitudinal elastic coefficient of the buffer is set to E, the coefficient of friction between the can and the buffer is set to μ, pi is set to π, and the maximum compressive force exerted by the can on the buffer when the can is full is set to N. max And through F fmax =μN max To determine the maximum frictional force F generated between the can and the buffer component. fmax hour, The slip component is configured to satisfy F fmax <(h) 3 bEπ 2 / 6l 2 ) relationship.

2. The can holding structure according to claim 1, characterized in that, The slippery component is a sheet made of polytetrafluoroethylene or polyethylene terephthalate.

3. The can holding structure according to claim 1, characterized in that, The slippery component is formed on the surface of the buffer and includes a rubber layer of resin particles or fibers with a low coefficient of friction.

4. The can holding structure according to claim 1, characterized in that, The slippery component is a layer formed by subjecting the surface of the buffer to high-density or high-hardness treatment.

5. The can holding structure according to claim 1, characterized in that, The lubricating component is a fiber-reinforced resin layer formed by winding resin fibers with a low coefficient of friction, impregnated with a matrix resin, around the outer peripheral surface of the can.

6. The can holding structure according to claim 1, characterized in that, The slip member is a roller disposed between the can and the buffer and capable of rotating along the axial direction of the can.

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