JP2019108081A - Hose clamp and fuel tank - Google Patents

Abstract

To enhance reliability of a hose holding function by use of a hose clamp.SOLUTION: A hose clamp 33 includes: a holding part 44 for elastically engaging a hose H to hold it; a rotation restriction part 37 for restricting a lock member 25 from displacing to an attachment/detachment allowed position by engaging with a support member 15 and the lock member 25 in a state in which the lock member 25 is in a stop position; and a fragile part 50 formed between the holding part 44 and the rotation restriction part 37, and having a strength lower than the holding part 44 and the rotation restriction part 37. The holding part 44, the fragile part 50, and the rotation restriction part 37 are aligned almost in a straight line with regard to the engaging direction of the hose H with the holding part 44.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hose clamp and a fuel tank.

  In Patent Document 1, a tank main body having an opening, a lid member detachable from the opening, a support member having a plurality of locking portions and fixed to the opening edge of the opening, and locking A fuel tank is disclosed that includes an annular lock member that holds the lid member attached to the opening by being locked to the portion. The lock member is detachably mounted to the tank body in a state of being arranged concentrically with the opening, and a retaining position in which detachment from the tank body is restricted by locking the lock portion. It can rotate in the circumferential direction between the

  In this type of fuel tank, a rotation restricting member locked to both the lock member and the support member can be attached as means for restricting the lock member from inadvertently rotating from the retaining position to the dismounting / dismounting position. . By mounting such a rotation restricting member, it is possible to restrict the relative displacement of the support member in the circumferential direction of the lock member. In addition, a flexible hose for adjusting the pressure in the tank body and the like is arranged near the fuel tank. However, a holding portion is formed on the rotation restricting member to make the rotation restricting member a hose. By causing the hose to function as a clamp and fitting the hose to the holding portion, vibration of the hose during traveling can be suppressed.

JP, 2010-076746, A

  As described above, when the hose clamp is held by the hose clamp, when the vehicle receives an impact, the hose clamp (rotation regulating member) may be separated from the lock member and the support member by the inertia force of the hose. When the hose clamp is disengaged from the lock member and the support member, there is a concern that the lock member may be moved from the disengaging position to the dismounting / dismounting position, thereby disengaging from the tank body. As a countermeasure, a fragile portion having a strength lower than that of the rotation restricting portion and the holding portion is formed between the rotation restricting portion which is locked to the lock member and the support member in the hose clamp and the holding portion which holds the hose. It is possible to do. If the fragile portion is formed, when the hose and the holding portion receive an impact, the fragile portion is broken and the holding portion and the hose are separated from the rotation restricting portion, so that the rotation restricting portion is locked to the lock member and the fixing portion It is possible to keep the condition.

  However, when the weak portion is formed in the hose clamp, when the hose is fitted into the holding portion, the fragile portion may be broken by the fitting force acting on the holding portion. If this happens, measures are required because the rotation restricting member loses the function of holding the hose.

  The present invention has been completed based on the above circumstances, and it is an object of the present invention to improve the reliability of a hose holding function by a hose clamp.

The hose clamp of the first invention is
An opening for attaching and detaching the lid member is formed in the tank body, a support member having an engagement portion is fixed to the opening edge of the opening, and an engagement position where the annular lock member engages with the engagement portion In the state in which the cover member is restricted from being separated from the opening, and in the state in which the lock member is circumferentially displaced from the locking position and is in the mounting / dismounting permission position separated from the locking portion, the lid Constituting a fuel tank adapted to allow the member to be released from the opening;
A holding portion that elastically fits and holds the hose;
A rotation restricting portion that restricts the displacement of the lock member to the attachment / detachment permitted position by fitting the support member and the lock member while the lock member is in the locking position;
It is formed between the holding portion and the rotation restricting portion, and is provided with a fragile portion whose strength is lower than that of the holding portion and the rotation restricting portion,
In the fitting direction of the hose with respect to the holding portion, the holding portion, the weak portion, and the rotation restricting portion are arranged in a substantially straight line.

The fuel tank of the second invention is
A tank body having an opening to which a lid member is attached;
A support member having a locking portion and fixed to the opening edge of the opening;
A locking position that restricts the lid member from being separated from the opening by locking to the locking portion, and allowing the lid member to separate from the opening by disengaging from the locking portion An annular lock member rotatable between the mounting position and the release position,
Equipped with a hose clamp,
The hose clamp is
A holding portion that elastically fits and holds the hose;
A rotation restricting portion that restricts the displacement of the lock member to the attachment / detachment permitted position by fitting the support member and the lock member while the lock member is in the locking position;
It is formed between the holding portion and the rotation restricting portion, and is provided with a fragile portion whose strength is lower than that of the holding portion and the rotation restricting portion,
In the fitting direction of the hose with respect to the holding portion, the holding portion, the weak portion, and the rotation restricting portion are arranged in a substantially straight line.

  When impact is applied to the hose and the holding portion in a state where the rotation restricting portion is locked to the lock member and the support member, the fragile portion is broken and the hose and the holding portion are separated from the rotation restricting portion. Keep locked to member and support member. Since the holding portion, the weak portion and the rotation restricting portion are aligned in a substantially straight line with respect to the fitting direction of the hose with respect to the holding portion, the pressing force when fitting the hose to the holding portion is through the holding portion to the weak portion Even if it acts, no shear stress is generated in the fragile portion, and the pressing force is received by the rotation control portion. Therefore, there is no possibility that the fragile portion may break when fitting the hose into the holding portion.

The perspective view of the hose clamp of Example 1 Front view of the hose clamp with the hose held Partial cutaway side view of hose clamp Partially enlarged sectional view showing the hose clamp attached to the tank body Partially enlarged sectional view showing a state where the fragile portion of the hose clamp attached to the tank body is broken and the holding portion is separated from the rotation restricting portion The top view showing the state which fixed the cover member to the support member using the lock member Perspective view of support member Perspective view of the locking member Perspective view of the lid member

  In the first and second inventions, the outer surface of the fragile portion may be formed with a groove portion for locally narrowing the width dimension of the fragile portion. According to this configuration, the strength of the fragile portion can be reduced without complicating the shape of the fragile portion.

  In the first and second inventions, the dimension of the fragile portion may be set to be smaller than the dimension of a base connected to the fragile portion of the holding portion in the axial direction of the hose. According to this configuration, the strength of the fragile portion can be reduced without complicating the shape of the fragile portion.

  In the first and second inventions, the dimension of the fragile portion is continuous with the fragile portion of the holding portion in the direction intersecting with both the axial direction of the hose and the direction in which the holding portion and the weak portion are arranged. It may be set smaller than the size of. According to this configuration, the strength of the fragile portion can be reduced without complicating the shape of the fragile portion.

  In the first and second inventions, the fragile portion may be configured to include a plurality of plate-like portions. According to this configuration, the strength of the fragile portion can be reduced without complicating the shape of the fragile portion.

Example 1
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In the following description, the right side in FIGS. 1 and 3 is defined as the front in the front-back direction. With regard to the upper and lower directions, the directions appearing in FIGS. 1 to 5 are defined as upper and lower as they are. For the left and right directions, the directions appearing in FIGS. 2, 4 and 5 are defined as left and right as they are.

  The fuel tank 10 according to the first embodiment includes a tank body 11, a support member 15, a lock member 25, a lid member 29, and a hose clamp 33. The tank body 11 is made of synthetic resin, and the inside of the tank body 11 is a storage space 12 for storing fuel. A circular opening portion 14 in a plan view shape is formed in the upper wall portion 13 substantially horizontally in the tank main body 11 to communicate the outside of the tank main body 11 with the inside of the storage space 12. The opening portion 14 is a portion for attaching and detaching the lid member 29 to the tank body 11.

<Support member 15>
The support member 15 is made of a plate material made of metal or synthetic resin. The plan view shape of the support member 15 has an annular shape. The support member 15 is disposed along the opening edge of the opening 14 in the upper wall 13 and concentric with the opening 14. The support member 15 includes a plate-like support portion 16 having an annular shape in plan view, a step portion 21 having an annular shape concentric with the plate-like support portion 16, and a circle concentric with the plate-like support portion 16 and the step portion 21. And an annular buried portion 24.

  As shown in FIG. 7, the plate-like support 16 is provided with a plurality of (eight in the first embodiment) engagement holes 17 (claims according to the present invention) in a form penetrating the plate-like support 16 in the vertical direction. Stops are formed at intervals in the circumferential direction. The locking hole 17 has a form in which a wide portion 18 having a relatively large width in the radial direction and a narrow portion 19 having a smaller width than the wide portion 18 are arranged in the circumferential direction and communicated with each other. A plurality of (two in the first embodiment) positioning holes 20 are formed in the plate-like support portion 16.

  As shown in FIGS. 4 and 5, the stepped portion 21 has a peripheral wall 22 projecting downward from the inner peripheral edge of the plate-like support 16 and a receiver projecting radially inward from a lower end edge of the peripheral wall 22. It consists of 23 and. The buried portion 24 protrudes downward from the inner peripheral edge of the receiving portion 23. The inner diameter of the embedded portion 24 is larger than the diameter (diameter) of the opening 14.

  The embedded portion 24 is embedded in the opening edge of the opening 14 by insert molding. Thus, the support member 15 is fixed to the upper wall portion 13 (tank main body 11) in a state in which relative displacement is restricted. As shown in FIGS. 4 and 5, in the state where the support member 15 is fixed to the tank main body 11, the plate-like support portion 16 concentrically surrounds the opening portion 14 and the upper surface (outer surface) of the upper wall portion 13. And an installation space between the two.

<Lock member 25>
The lock member 25 is made of a metal or synthetic resin plate material. The plan view shape of the lock member 25 has an annular shape. The lock member 25 is attached to the support member 15 so as to concentrically cover the upper surface thereof. The lock member 25 has a plate-like main portion 26 which has an annular shape having a larger diameter in plan view than the diameter of the opening 14.

  In the plate-like main body portion 26, a plurality of (eight in the first embodiment) locking claws 27 extending downward from the outer peripheral edge thereof are formed at intervals in the circumferential direction. The number of locking claws 27 is the same as the number of locking holes 17. The locking claw 27 has a shape bent in a substantially L shape. A plurality of (two in the first embodiment) lock holes 28 are formed in the plate-like main body 26 at intervals in the circumferential direction.

<Lid member 29>
The lid member 29 is made of a synthetic resin material and has a disk shape as a whole. A plurality of (two in the first embodiment) positioning projections 30 are formed on the outer periphery of the lid member 29. A connector 31 and a hose connection portion 32 are provided on the top surface of the lid member 29. The lid member 29 is attached to the tank main body 11 by the support member 15 and the lock member 25 so as to close the opening 14.

  When attaching the lid member 29 to the tank body 11, the positioning projection 30 of the lid member 29 is fitted into the positioning hole 20 of the support member 15 in a state where the lock member 25 is removed from the tank body 11. The outer peripheral edge portion of the carrier is placed on the receiving portion 23 of the support member 15. As a result, the lid member 29 closes the opening 14 and is positioned in a state where relative displacement in the horizontal direction with respect to the tank main body 11 is restricted.

  Thereafter, the plurality of locking claws 27 of the locking member 25 are inserted into the wide portions 18 of the corresponding locking holes 17, respectively, and the plate-like main body 26 is placed on the upper surface of the plate-like support 16 to overlap. The position of the lock member 25 at this time is defined as the removable position. When the lock member 25 at the removable position is rotated, the plurality of locking claws 27 move to the narrow portion 19 of the locking hole 17, and the lower end portion of the locking claw 27 is below the opening edge of the narrow portion 19. It will be in the state to lock from. The position of the lock member 25 at this time is defined as a locking position. By moving the lock member 25 to the locking position, the relative displacement of the lock member 25 in the horizontal direction (two-dimensional direction perpendicular to the vertical direction) with respect to the support member 15 and the tank main body 11 is restricted. It will be in the state where the withdrawal from was controlled.

  When the lock member 25 is attached to the support member 15 in this manner, the outer peripheral edge portion of the lid member 29 is clamped vertically between the receiving portion 23 of the support member 15 and the plate-like main body portion 26 of the lock member 25. Be Thus, the lid member 29 is restricted from being separated upward with respect to the support member 15 and the tank body 11. As described above, the lid member 29 is attached to the tank main body 11 in the state of closing the opening 14.

<Hose clamp 33>
The hose clamp 33 is made of a synthetic resin material, and is a single part including the base portion 34, the rotation restricting portion 37, the elastic locking portion 38, the holding portion 44, and the fragile portion 50. The base portion 34 has a block shape elongated in the front-rear direction (the circumferential direction concentric with the support member 15 and the lock member 25) as a whole. The plan view shape of the base portion 34 has an arc shape. The front end of the base portion 34 is a front stopper 35. The left side surface of the base portion 34 is formed with a side stopper 36 that protrudes like a rib along the lower end edge thereof and extends in the front-rear direction.

  The rotation restricting portion 37 protrudes from the lower surface of the base portion 34. The bottom view shape of the rotation restricting portion 37 is an arc shape along the circumferential direction concentric with the support member 15 and the lock member 25. The right side surface of the rotation restricting portion 37 continues flush with the right side surface of the base portion 34. The side stopper 36 protrudes leftward more than the left side surface of the rotation restricting portion 37. The front stopper 35 projects more forward than the front end of the rotation restricting portion 37.

  The elastic locking portion 38 includes a pair of front and rear legs 39, a connecting portion 40, an arm portion 41, and a retaining projection 42. The pair of front and rear legs 39 extend downward from the lower end of the left side of the base 34 along the left side of the rotation restricting portion 37 and at a distance from the left side of the rotation restricting portion 37. . The connection part 40 is a form which connected lower end parts of a pair of leg parts 39. As shown in FIG. The arm portion 41 is in the form of being cantilevered upward from the connecting portion 40. The retaining projection 42 protrudes from the lower end portion of the arm portion 41 toward the left side surface of the rotation restricting portion 37. An upper end portion of the arm portion 41 is a release operation portion 43.

  The holding portion 44 elastically holds the hose arranged in the vicinity of the opening portion 14, and the base 45 and a pair of left and right elastic holding pieces extending in a cantilever shape from the base 45. It consists of 46 and. The pair of elastic holding pieces 46 has a substantially arc shape disposed along one virtual circle (not shown), and the space between the elastic holding pieces 46 is a housing space 47 opened to both the front and rear. ing.

  Between the upper end portions of the two elastic holding pieces 46, a fitting notch portion 48 which allows the space above the holding portion 44 to communicate with the accommodation space 47 is formed. When the pair of elastic holding pieces 46 are elastically deformed so as to move away from each other, the width dimension (the dimension in the left-right direction) of the fitting notch portion 48 is expanded. Thus, the fitting notch 48 is a passage for accommodating the accommodation space 47 between the elastic holding pieces 46 while displacing the hose in the radial direction.

  The fragile portion 50 has a form in which the rotation restricting portion 37 and the holding portion 44 are connected via the base portion 34, and is a portion functioning as a means for separating the holding portion 44 from the rotation restricting portion 37. The lower end portion of the fragile portion 50 is continuous with the upper end portion of the upper surface of the base portion 34, and the lower end portion of the base 45 is continuous with the upper end of the fragile portion 50. As shown in FIG. 2, when the hose clamp 33 is viewed from the front, the fitting notch 48, the accommodation space 47, the base 45, the fragile portion 50, the base 34, and the rotation restricting portion 37 are in order from top to bottom. It is arranged to line up in a substantially straight line.

  The fragile portion 50 includes a front plate portion 51 (a plate portion described in the claims), and a pair of left and right side plate portions 52 extending substantially at a right angle from the left and right side edges of the front plate portion 51 (claims) And the side plate portion 52). The front plate portion 51 is configured to rise at a right angle from the front end edge of the upper surface of the base portion 34. The left and right side plate portions 52 are configured to rise perpendicularly from the left and right side edges of the upper surface front end portion (front stopper 35) of the base portion 34.

  The upper end edge of the front plate portion 51 and the upper end edges of the left and right side plate portions 52 are continuous with the lower surface of the base 45 substantially at right angles. Grooves 53 extending in the front-rear direction are formed on the outer side surfaces of the left and right side plates 52. Since the thickness of the side plate portion 52 becomes thinner in the groove portion 53 as a straight part, the portion of the side plate portion 52 where the groove portion 53 is formed is the weakest in strength.

  As shown in FIG. 3, the front-rear dimension of the fragile portion 50 is set smaller than the front-rear dimension of the base 45, and the fragile portion 50 is disposed in the rear end region of the base 45 in the front-rear direction. Further, the fragile portion 50 is disposed in front of the front end of the rotation restricting portion 37. Therefore, the holding portion 44 is also disposed forward of the rotation restricting portion 37. The left and right dimensions of the fragile portion 50 are set smaller than the left and right dimensions of the base 45, and the fragile portion 50 is disposed at a position closer to the right than the center of the base 45 in the left and right direction.

  Inside the fragile portion 50, a lightening space 54 partitioned by the front plate portion 51, the left and right side plate portions 52, and the lower surface of the base 45 is formed. The lightening space 54 is open to the rear surface of the fragile portion 50 and is also open to the lower surface of the base portion 34 through the lightening portion 55 formed in the front stopper 35. The upper end of the lightening portion 55 opens in the upper surface of the base portion 34 in a region adjacent to the rear of the fragile portion 50 (lightening space 54).

<Operation and Effect of Example 1>
When attaching the hose H to the holding portion 44, the hose H is pushed radially from above the holding portion 44. Since the pair of elastic holding pieces 46 elastically deform as the hose H is pushed in, a downward pushing force exceeding the elastic restoring force is applied to the hose H. The downward pressing force applied to the hose H is transmitted to the fragile portion 50 through the elastic holding piece 46 and the base 45, and is further transmitted from the fragile portion 50 to the base 34 and the rotation restricting portion 37.

  At this time, since the hose H (fitting notch 48), the base 45, the fragile portion 50, the base 34, and the rotation restricting portion 37 are in a straight line in parallel with the pressing force applied to the hose H, the hose H The pressing force applied to the fragile portion 50 is received by the base portion 34 or the rotation restricting portion 37. Therefore, the shearing force does not act to cause the fragile portion 50 to break.

  The hose clamp 33 configured as described above is attached to the lock member 25 and the support member 15 after the lock member 25 is assembled to the support member 15 and the lid member 29 is locked in the attached state. When the locking member 25 is rotated to the locking position, as shown in FIG. 6, the two locking holes 28 and the wide portions 18 of the two locking holes 17 have such a positional relationship that the two opening regions overlap each other.

  In the space where the lock hole 28 and the wide portion 18 overlap, the rotation restricting portion 37 is fitted so as to be dropped from above. Then, a portion of the opening edge of the lock hole 28 and a portion of the opening edge of the wide portion 18 are engaged with the rotation restricting portion 37 in a circumferential direction (rotational direction of the lock member 25). As a result, the lock member 25 is restricted from rotating from the locking position to the mounting / demounting permitting position.

  In the state where the hose clamp 33 is attached to the lock member 25 and the support member 15, the side stopper 36 and the front stopper 35 abut against the upper surface of the plate-like main body 26 of the lock member 25 from above and Lock onto the outer peripheral edge of the plate-like support 16 of the support member 15 from below. Thus, the hose clamp 33 is held attached to the lock member 25 and the support member 15. When the hose clamp 33 is removed, the retaining projection 42 is formed by pressing the release operation portion 43 radially inward (rightward in FIGS. 2, 4 and 5) to bend the connecting portion 40 radially outward. It may be removed from the plate-like support 16.

  The fuel tank 10 according to the first embodiment has a tank body 11 having an opening 14 to which a lid member 29 is attached, a support member 15 having a locking hole 17 and fixed to the opening edge of the opening 14; It has a lock member 25 and a hose clamp 33. The lock member 25 locks the lock member 17 from the opening 14 by locking the lock member 17 in the lock hole 17, and the lock member 25 separates from the lock hole 17 from the opening 14. It is rotatable between a release permitting position which allows release.

  The hose clamp 33 has a holding portion 44, a rotation restricting portion 37, and a fragile portion 50. The holding portion 44 elastically fits and holds the hose. The rotation restricting portion 37 restricts the displacement of the lock member 25 to the attachment / detachment permitted position by fitting the support member 15 and the lock member 25 in a state where the lock member 25 is in the locking position.

  The fragile portion 50 is formed to be located between the holding portion 44 and the rotation restricting portion 37 (base portion 34). The fragile portion 50 has a lower strength than the base portion 34, the rotation restricting portion 37, and the holding portion 44. In the front view of the hose clamp 33, the holding portion 44, the fragile portion 50, the base portion 34 and the rotation restricting portion 37 are arranged substantially in a straight line in the fitting direction of the hose H with respect to the holding portion 44.

  According to the above configuration, when an impact is applied to the hose H and the holding portion 44 in a state in which the rotation restricting portion 37 is locked to the lock member 25 and the support member 15, the fragile portion 50 is broken as shown in FIG. Thus, the hose H and the holding portion 44 are separated from the base portion 34 and the rotation restricting portion 37. As a result, the rotation restricting portion 37 maintains the locked state between the lock member 25 and the support member 15.

  Since the holding portion 44, the weak portion 50, the base portion 34, and the rotation restricting portion 37 are substantially aligned in a straight line with respect to the fitting direction of the hose H with respect to the holding portion 44, the hose H is fitted to the holding portion 44. Even if the pressing force acts on the fragile portion 50 via the holding portion 44, no shear stress is generated in the fragile portion 50, and the pressing force is received by the base portion 34 or the rotation regulating portion 37. Therefore, when fitting the hose H to the holding portion 44, there is no possibility that the fragile portion 50 is broken.

  Further, since the groove 53 for locally narrowing the width dimension of the fragile portion 50 is formed on the outer surface of the fragile portion 50, the strength of the fragile portion 50 is reduced without complicating the shape of the fragile portion 50. be able to. Further, with respect to the axial direction (front-rear direction) of the hose H, since the dimension of the fragile portion 50 is set smaller than the dimension of the base 45 connected to the fragile portion 50 in the holding portion 44, the shape of the fragile portion 50 is complicated. Even if not, the strength of the fragile portion 50 can be reduced.

  Further, the dimension of the fragile portion 50 in the axial direction (front-rear direction) of the hose H and the direction (left-right direction) intersecting with both directions of the direction in which the holding portion 44 and the fragile portion 50 line up (vertical direction) Among them, the dimension is set smaller than the dimension of the base 45 connected to the fragile portion 50. According to this configuration, the strength of the fragile portion 50 can be reduced without making the shape of the fragile portion 50 complicated. In addition, since the fragile portion 50 is configured to include a plurality of plate-like portions (the front plate portion 51 and the left and right side plate portions 52), the strength of the fragile portion 50 can be increased even if the shape of the fragile portion 50 is not complicated. It can be lowered.

Other Embodiments
The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Although the groove is formed on the outer surface of the fragile portion as a means for reducing the strength of the fragile portion in the above embodiment, the groove may not be formed on the outer surface of the fragile portion.
(2) In the above embodiment, as a means for reducing the strength of the fragile portion, the dimension of the fragile portion in the axial direction of the hose is set smaller than the dimension of the base connected to the fragile portion in the holding portion. The dimensions may be the same as or larger than the dimensions of the base of the holder.
(3) In the above embodiment, as a means for reducing the strength of the fragile portion, the dimensions of the fragile portion in the axial direction of the hose and in the direction intersecting with both the holding portion and the weak portion are Although set smaller than the dimension, the dimension of the fragile portion may be the same as or larger than the dimension of the base of the holder.
(4) In the above embodiment, the weak portion is formed of a plurality of plate-like portions as means for reducing the strength of the weak portion. However, the weak portion may have no plate-like portion.

DESCRIPTION OF SYMBOLS 10 ... Fuel tank 11 ... Tank main body 14 ... Opening part 15 ... Support member 17 ... Locking hole (locking part)
Reference Signs List 25 lock member 29 lid member 33 hose clamp 37 rotation restricting portion 44 holding portion 45 base portion 50 fragile portion 51 front plate portion (plate-like portion)
52 Side plate (plate-like portion)
53 ... groove section H ... hose

Claims (6)

An opening for attaching and detaching the lid member is formed in the tank body, a support member having an engagement portion is fixed to the opening edge of the opening, and an engagement position where the annular lock member engages with the engagement portion In the state in which the cover member is restricted from being separated from the opening, and in the state in which the lock member is circumferentially displaced from the locking position and is in the mounting / dismounting permission position separated from the locking portion, the lid Constituting a fuel tank adapted to allow the member to be released from the opening;
A holding portion that elastically fits and holds the hose;
A rotation restricting portion that restricts the displacement of the lock member to the attachment / detachment permitted position by fitting the support member and the lock member while the lock member is in the locking position;
It is formed between the holding portion and the rotation restricting portion, and is provided with a fragile portion whose strength is lower than that of the holding portion and the rotation restricting portion,
A hose clamp characterized in that the holding portion, the weak portion, and the rotation restricting portion are arranged substantially in a straight line in the fitting direction of the hose with respect to the holding portion.   The hose clamp according to claim 1, wherein a groove portion for locally narrowing the width dimension of the fragile portion is formed on the outer surface of the fragile portion.   The hose clamp according to claim 1 or 2, wherein the dimension of the fragile portion in the axial direction of the hose is set smaller than the dimension of the base portion connected to the fragile portion of the holding portion.   The dimension of the fragile portion is set to be smaller than the dimension of the base portion connected to the fragile portion of the holding portion in a direction intersecting with both the axial direction of the hose and the direction in which the holding portion and the fragile portion are aligned. The hose clamp according to any one of claims 1 to 3, characterized in that   The hose clamp according to any one of claims 1 to 4, wherein the fragile portion includes a plurality of plate-like portions. A tank body having an opening to which a lid member is attached;
A support member having a locking portion and fixed to the opening edge of the opening;
A locking position that restricts the lid member from being separated from the opening by locking to the locking portion, and allowing the lid member to separate from the opening by disengaging from the locking portion An annular lock member rotatable between the mounting position and the release position,
Equipped with a hose clamp,
The hose clamp is
A holding portion that elastically fits and holds the hose;
A rotation restricting portion that restricts the displacement of the lock member to the attachment / detachment permitted position by fitting the support member and the lock member while the lock member is in the locking position;
It is formed between the holding portion and the rotation restricting portion, and is provided with a fragile portion whose strength is lower than that of the holding portion and the rotation restricting portion,
A fuel tank, wherein the holding portion, the fragile portion, and the rotation restricting portion are arranged substantially in a straight line with respect to a fitting direction of the hose with respect to the holding portion.

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