JP6368556B2 - Hose clamp - Google Patents

Description

  The present invention relates to, for example, a hose clamp used when connecting pipes of an automobile using a hose.

  Conventionally, when connecting automobile pipes using a hose, a flexible hose is placed on the outer periphery of the pipe-shaped pipe, and the outer periphery of the hose is further tightened with a hose clamp to connect the pipe. A method of fixing the hose is widely used.

  For example, in the following Patent Document 1, an annular leaf spring body is provided, and a slit along the circumferential direction and an arch-shaped first tab piece projecting in the outer diameter direction are formed at one end thereof, and the other end is formed at the other end. An insertion piece that slides in the slit is formed, and the second knob piece projects from the end in the outer diameter direction. From the inside of the arch-shaped first knob piece, a hook-like engagement is formed toward the second knob piece. A stop piece extends, and an operation piece extends a predetermined length in the width direction of the leaf spring body so that the second tab piece is positioned above the lock piece. The hose clamp which provided the stopper part which hold | maintains the engagement state when is engaged is described. Further, the stopper portion has a concave shape with a predetermined depth in the thickness direction of the second tab piece on the surface opposite to the surface facing the first tab piece of the second tab piece, and its peripheral edge is a wall. It is a ditch surrounded by.

  Then, both knob pieces are gripped with a tool such as a plier and are brought close to each other in the circumferential direction, and the latching claw at the tip of the latching piece of the first knob piece is engaged with the second knob piece. As a result, the leaf spring body is maintained in an expanded state. After the hose clamp in this state is arranged on the outer periphery of the hose, a pair of knob pieces are sandwiched between pliers and the like, or the tip of a tool such as a flathead screwdriver is placed on the upper surface of the locking piece and the operation piece. The operation piece is pushed up or the locking piece is pushed down. As a result, the latching claw of the latching piece comes off from the concave groove of the second knob piece, the leaf spring body is elastically restored, and the hose is fastened and fixed.

Republished patent WO2007 / 108155

  However, in the hose clamp of Patent Document 1, the concave groove that is the stopper portion has a concave shape surrounded by a wall, and the latching claw of the locking piece enters and is held in the concave groove. When using a tool such as a flat-blade screwdriver to release the engagement between the locking piece and the second knob piece, the operating piece must be pushed up or pushed down to the extent that the locking claw gets over the groove. In some cases, it is difficult to disengage the locking piece and the second tab piece.

  Therefore, an object of the present invention is to reduce the diameter of the leaf spring body held in the expanded state by releasing the engagement between the locking piece and the second knob piece with a release tool such as a flathead screwdriver. It is an object of the present invention to provide a hose clamp that can easily perform the operation.

  In order to achieve the above object, the present invention has a leaf spring body formed in an annular shape, and a slit formed along the circumferential direction at one end portion of the leaf spring body, and a radially outward direction. A first tab piece that is bent toward the end, and is inserted into the slit at the other end of the leaf spring main body, and is inserted into the slit and slidable in the circumferential direction. From the free state where the leaf spring main body is reduced in diameter by bending from the end of the insert piece outward in the radial direction to form a second knob piece disposed opposite the first knob piece. When the first tab piece and the second tab piece are brought close to each other, the leaf spring body is a hose clamp hose clamp configured to expand its diameter against its elastic force, and the first tab piece includes , Extending toward the second tab piece and the leaf spring book A locking piece provided with an engaging claw that is engageable on a surface of the second tab piece opposite to the surface facing the first tab piece, and the locking piece, There is provided a release tool locking portion for releasing the engagement with the second knob piece, and the tip of the release tool is locked, and the second knob piece includes the first knob piece. When the engaging claw of the locking piece is engaged with the surface opposite to the opposing surface, a stopper portion is formed to hold the state, and the leaf spring body has a reduced diameter. In the free state, it is formed at a position that is shifted in the width direction with respect to the stopper portion and does not overlap in the circumferential direction, the stopper portion is formed of a recess, and the tip end side of the second knob piece of the recess is An opening is formed to escape to the side of the second knob piece, and the engaging claw passes through the opening and exits from the recess. And in, characterized in that the engagement between the locking piece and the second grip piece is configured to be released.

  In the hose clamp of the present invention, a guide portion for guiding the engaging claw of the locking piece to the opening portion side is provided on the inner surface of the concave portion of the stopper portion at a position facing the opening portion. It is preferable that

  In the hose clamp of the present invention, the second tab piece is bent at an angle inclined with respect to a direction perpendicular to the center line in the width direction of the leaf spring body, and is separated from the locking piece of the first tab piece. Thus, it is preferable to extend outward in the width direction.

  In the hose clamp of this invention, it is preferable that the bottom face of the recessed part of the said stopper part has a part which inclines so that it may become deep gradually toward the said opening part side.

  In the hose clamp of the present invention, the locking part for the release tool is a slit-like hole extending in the width direction of the first tab piece, and the second tab piece is engaged with the locking piece. Thus, it is preferable that at least a part of the release member locking portion overlaps in the width direction of the leaf spring body.

  According to the hose clamp of the present invention, the first tab piece and the second tab piece are brought close to each other against the elastic force from the free state in which the leaf spring body is reduced in diameter, and the locking piece is moved in the width direction. The engagement state is maintained by engaging the claw with a stopper portion formed of a recess formed on the surface of the second tab piece opposite to the surface facing the first tab piece. It can be maintained in a state where the diameter has been expanded in a state in which both end portions are bent in the width direction.

  In this state, a hose clamp is arranged on the outer periphery of the hose, and the tip of the release tool such as a flathead screwdriver is locked to the release lock part of the first knob piece, and the release tool is brought into contact with the second knob piece. Then, by pressing the second knob piece against the first knob piece to the hose side, the engaging claw formed on the locking piece of the first knob piece moves to the opening side of the concave portion forming the stopper portion. Then, both ends of the leaf spring body bent in the width direction are elastically restored, so that the engaging claw passes through the opening and comes out of the recess, so that the engagement between the locking piece and the second knob piece is released. The insertion piece can slide in the slit and the leaf spring body can be reduced in diameter, and the hose can be fastened and fixed to a pipe or the like.

  And in this hose clamp, when reducing the diameter of the expanded leaf spring main body, the distal end portion of the release tool is locked to the release locking portion, and the release tool is brought into contact with the second knob piece, Since the engagement between the locking piece and the second knob piece can be released by a simple operation of simply pressing the second knob piece against the first knob piece toward the hose side, the diameter reducing operation of the leaf spring body Can be carried out smoothly and reliably.

1 shows an embodiment of a hose clamp according to the present invention and is a perspective view in an expanded state. It is a perspective view of the diameter reduction state of the hose clamp. It is a principal part expansion perspective view in the diameter expansion state of the hose clamp. It is a top view in the diameter expansion state of the hose clamp. It is a top view in the diameter reduction state of the hose clamp. It is sectional drawing in the AA arrow line of FIG. It is explanatory drawing at the time of releasing engagement with a locking piece and a 2nd knob piece using a releasing tool in the diameter expansion state of the hose clamp. In the same hose clamp, the operation of the engaging claw in the recess when releasing the engagement between the locking piece and the second knob piece is shown, (a) is an explanatory view in the first state, (b) Is an explanatory diagram in the second state, and (c) is an explanatory diagram in the third state. It is explanatory drawing at the time of releasing engagement with a locking piece and a 2nd knob piece using a tool in the diameter expansion state of the hose clamp. The other embodiment of the hose clamp which concerns on this invention is shown, and it is sectional explanatory drawing in a diameter-expanded state. The other embodiment of the hose clamp which concerns on this invention is shown, and it is a perspective view of a diameter-expanded state. It is a top view in the diameter expansion state of the hose clamp. It is sectional drawing in the BB arrow line of FIG. It is a top view in the diameter reduction state of the hose clamp.

  Hereinafter, with reference to FIGS. 1-9, one Embodiment of the hose clamp which concerns on this invention is described.

  As shown in FIGS. 1 and 2, the hose clamp 10 of the present invention (hereinafter referred to as “clamp 10”) tightens the outer periphery of a hose H that is put on one end of a pipe P having a pipe shape. It is used for fixing the hose H.

  The clamp 10 in this embodiment is formed by punching a band-shaped metal plate into a predetermined shape and bending it, and has a leaf spring main body 15 that is formed in an annular shape.

  A slit 19 is formed at one end of the leaf spring body 15 with a predetermined length along the circumferential direction. At the distal end side in the circumferential direction of the slit 19, one end portion of the leaf spring body 15 is bent, thereby forming a first knob piece 20 that protrudes outward in the radial direction and has an arch shape. The first knob piece 20 has a surface opposite to the surface facing the first knob piece 20 of the second knob piece 40 (see FIG. 1) (hereinafter referred to as “the outer surface of the second knob piece 40”). It has the latching piece 25 engaged with.

  On the other hand, the other end of the leaf spring body 15 is inserted into the slit 19 and an insertion piece 35 that slides in the circumferential direction in the slit 19 when the leaf spring body 15 is expanded or contracted. Is formed. A distal end portion of the insertion piece 35 is bent outward in the radial direction of the leaf spring body 15 to form a second knob piece 40 disposed to face the first knob piece 20.

  As shown in FIGS. 2 and 5, in the spring body 15, in the free state, the first tab piece 20 and the second tab piece 40 are reduced in diameter in the circumferential direction, and the elastic force of the leaf spring body 15 is reduced. In contrast, when the first tab piece 20 and the second tab piece 40 are brought close to each other in the circumferential direction, the diameter is increased (see FIGS. 1 and 4). A plurality of long holes 17 are formed in the middle portion in the circumferential direction of the leaf spring main body 15 so that the stress distribution is made uniform.

  Further, on the upper wall portion 21 extending along the width direction of the leaf spring main body 15 of the first tab piece 20, a locking screwdriver 25 or the like that releases the engagement between the locking piece 25 and the second tab piece 40 is used. A release tool locking portion 22 (hereinafter, referred to as “locking portion 22”) in which the distal end portion of the release tool R (see FIG. 7) is locked is formed.

  The locking portion 22 in this embodiment forms a slit-like through hole extending in the width direction of the first tab piece 20 (see FIG. 3). In addition, as a release tool prevention part, for example, it may have a concave groove shape that does not penetrate, or a part of the first tab piece 20 may be bent, and the tip of the release tool can be locked. Any shape is acceptable.

  As shown in FIGS. 3 and 4, the distal end portion 41 of the second tab piece 40 extends toward one side in the width direction of the leaf spring main body 15 (direction approaching the locking piece 25). The piece 40 is formed with a width that at least partially overlaps with the locking portion 22 in the width direction of the leaf spring body 15 in a state of being engaged with the locking piece 25. The shaft portion of the release tool R locked to the locking portion 22 is placed on the tip portion 41 of the second knob piece 40.

  As shown in FIGS. 2, 3, and 5, the locking piece 25 that engages with the second tab piece 40 has a predetermined width from the lower surface side of the upper wall portion 21 of the first tab piece 20 in this embodiment. The base 27 extends from one side in the width direction of the base 27 (the side away from the second tab piece 40) toward the second tab piece 40 in the circumferential direction. The leading end 29 of the locking piece 25 in the extending direction is bent toward the radially inner side of the leaf spring body 15 (see FIG. 3). Is prevented from being accidentally picked by a tool T (see FIG. 9) such as a pliers or pliers.

  As shown in FIGS. 2 and 5, a taper portion 27 a spreading in the width direction toward the first knob piece 20 side is formed on the side edge of the base portion 27 of the locking piece 25 on the center side in the width direction of the leaf spring body 15. Is formed. The tapered portion 27a comes into contact with the second tab piece 40 when the first tab piece 20 and the second tab piece 40 are brought close to each other from the state in which the leaf spring main body 15 is expanded in diameter (see FIG. 10). The second knob piece 40 is a portion that moves in the width direction away from the locking piece 25. The base 27 of the locking piece 25 is formed with a hole 27b so that the locking piece 25 can be easily bent.

  The distal end portion 29 of the locking piece 25 has a wide shape protruding with a predetermined width in the width direction of the leaf spring main body 15, and the second portion from the end portion on the first knob piece 20 side of the wide portion An engaging claw 31 that can engage with a surface of the tab piece 40 opposite to the surface facing the first tab piece 20 is projected (see FIGS. 3 and 5). Note that the outer periphery of the tip of the engaging claw 31 has a rounded curved surface. Further, the side edge 32 of the distal end portion 29 of the locking piece 25 on the second knob piece 40 side has a tapered shape that gradually becomes narrower toward the forefront of the locking piece 25.

  And the stopper part which hold | maintains the state when the engaging claw 31 of the latching piece 25 engages is provided in the outer surface of the 2nd knob piece 40. As shown in FIG. As shown in FIGS. 3 and 8, the stopper portion is formed by a concave portion 43 formed on the outer surface of the second tab piece 40 and on the side portion adjacent to the locking piece 25.

  The concave portion 43 of this embodiment is formed at a predetermined depth in the thickness direction of the second tab piece 40, and a portion near the base of the second tab piece 40 holds the engaging claw 31 of the locking piece 25. In addition to the portion 45, the tip portion 41 side of the second tab piece 40 forms an opening 47 that extends to the side of the second tab piece 40. Then, when the engaging claw 31 of the locking piece 25 passes through the opening 47 of the recess 43 and comes out, the engagement between the locking piece 25 and the second knob piece 40 is released. .

  In addition, a guide portion 49 that guides the engaging claw 31 of the locking piece 25 toward the opening 47 is provided on the inner surface of the recess 43 at a position facing the opening 47. As shown in FIG. 8, the guide portion 49 of this embodiment extends from the end portion of the inner surface of the holding portion 45 of the concave portion 43 opposite to the locking piece 25 and is formed with a predetermined radius of curvature. And a linear portion 49b having an inclined surface linearly extending obliquely outward from the terminal end of the R-shaped portion 49a toward the side of the second knob piece 40.

  Further, as shown in FIG. 8, a curved R-shaped portion 51 is formed between the inner surface end of the holding portion 45 of the concave portion 43 on the locking piece 25 side and the opening portion 47. Therefore, when the engaging claw 31 of the locking piece 25 comes out of the opening 47 of the recess 43, it is difficult to get caught.

  Furthermore, as shown in FIG. 6, both side corners 53 of the bottom surface 44 of the concave portion 43 are formed in a curved shape up to the opening 47. The radius of curvature of the corner 53 is formed smaller than the radius of curvature of the outer periphery of the distal end of the engaging claw 31 of the locking piece 25 (see FIG. 6).

  In addition, as a guide part, it has comprised the taper shape extended diagonally outward toward the side of the 2nd knob piece 40 from the inner surface edge part of the holding part 45 of the recessed part 43, or the holding part of the recessed part 43 From the inner surface end of 45 to the side of the second knob piece 40, it may have an R shape with the same radius of curvature, and the engaging claw 31 of the locking piece 25 is connected to the opening 47 side. It only needs to be able to be guided to.

  Further, as shown in FIG. 5, the inner surface of the portion of the second tab piece 40 where the concave portion 43 serving as the stopper portion is located is in a free state in which the leaf spring main body 15 has a reduced diameter, and the engagement of the first tab piece 20. It is shifted in the width direction with respect to the engaging claw 31 of the stop piece 25 and is formed at a position where it does not overlap when viewed along the circumferential direction.

  Then, both the tab pieces 20 and 40 are brought close to each other in the circumferential direction, and the leaf spring body 15 is bent in the width direction so that the engaging claw 31 is aligned with the concave portion 43, and is engaged with the holding portion 45 of the concave portion 43. By inserting and engaging the claw 31, the leaf spring body 15 is held in an expanded state (see FIGS. 1 and 4). At this time, since the engaging claws 31 and the recesses 43 that are displaced in the width direction are bent and deformed in the width direction of the leaf spring main body 15, the locking pieces 25 and the second tab pieces 40 are engaged. The elastic restoring force acts in a direction away from each other (see the arrow in FIG. 6), and the engagement claw 31 is engaged with the inner surface of the recess 43 on the locking piece 25 side.

  In this embodiment, as described above, the radius of curvature of the side corners 53 of the recess 43 is smaller than the radius of curvature of the outer periphery of the tip of the engaging claw 31, so as shown in FIG. The engaging claw 31 has its tip abutted against the bottom surface 44 of the recess 43 and one side surface engaged with the inner surface of the recess 43 on the locking piece 25 side through a predetermined gap.

  On the other hand, in the state where the leaf spring main body 15 is expanded in diameter, the distal end portion of the release tool R is inserted into the lock portion 22 to be locked, and the shaft portion of the release tool R is fixed to the second knob piece 40. By placing the second tab piece 40 against the first tab piece 20 against the hose H side (see FIG. 7), the engaging claw 31 of the locking piece 25 is moved to the concave portion 43. It moves from the holding part 45 side to the opening part 47 side (see FIG. 8A). At this time, since the guide portion 49 is provided in the concave portion 43, when the engaging claw 31 comes into contact with the guide portion 49, the reaction force is oblique to the R-shaped curved surface of the R-shaped portion 49 a or the linear portion 49 b. The inclined surface extending outward provides a force for moving the engaging claw 31 toward the opening 47 of the recess 43, and guides the engaging claw 31 along the guide portion 49 (see FIG. 8B). ) Further, both ends of the leaf spring body 15 bent in the width direction are elastically restored, so that the engaging claw 31 passes through the opening 47 and comes out of the recess 43 (see FIG. 8C). At the same time, the second knob piece 40 passes through the side of the locking piece 25, the insertion piece 35 slides in the slit 19, and the leaf spring main body 15 is reduced in diameter.

  Next, a procedure for fastening and fixing a flexible hose H made of a material such as rubber to a pipe P such as a pipe using the clamp 10 having the above-described configuration will be described.

As shown in FIG. 2, the first tab piece 20 and the second tab piece are separated from the first tab piece 20 and the second tab piece 40 and the leaf spring main body 15 is in a free state and has a reduced diameter. 40 is picked by a tool T (see FIG. 9) such as a pliers or pliers, and is sandwiched in the circumferential direction against the elastic restoring force of the leaf spring body 15. And the front-end | tip part 29 of the latching piece 25 is protruded to the outer surface side of the 2nd knob piece 40, and the leaf | plate spring main body 15 is bent in the width direction, and the engagement nail | claw 31 is provided.
Is inserted into and engaged with the holding portion 45 of the concave portion 43 which is a stopper portion (see FIGS. 3 and 6). As a result, the engagement state between the engagement claw 31 of the locking piece 25 and the second tab piece 40 is held by the recess 43, and both ends of the leaf spring body 15 are bent in the width direction. The leaf spring body 15 can be maintained in an expanded state (see FIG. 6).

  In this state, the clamp 10 is disposed on the outer periphery of the hose H attached to the outer periphery of one end of the pipe P. And the front-end | tip part of the releasing tool R is inserted and locked in the slit-hole-shaped latching | locking part 22, and the axial part of the same releasing tool R is mounted in the front-end | tip part 41 of the 2nd knob piece 40, and is 2nd. The tab 40 is pressed against the first tab 20 toward the hose H (see FIG. 7). Then, the engaging claw 31 of the locking piece 25 moves from the holding portion 45 side of the concave portion 43 to the opening portion 47 side (see FIG. 8A), and the guide portion 49 provided in the middle of the concave portion 43. The engaging claws 31 are gradually guided toward the opening 47 by the R-shaped portion 49a and the linear portion 49b (see FIG. 8B), and both end portions of the leaf spring body 15 further bent in the width direction. When the elastic claw is restored, the engaging claw 31 passes through the opening 47 and comes out of the recess 43 (see FIG. 8C), and the engagement claw 31 of the locking piece 25 and the second tab piece 40 The engagement can be released. At the same time, the second knob piece 40 passes by the side of the locking piece 25, the insertion piece 35 slides in the slit 19, and the leaf spring body 15 is reduced in diameter. Can be fixed to.

  Thus, in the hose clamp 10, when the diameter of the expanded leaf spring body 15 is reduced, the distal end portion of the release tool R is locked to the locking portion 22, and the release tool R is connected to the second knob piece. The engagement between the locking piece 25 and the second knob piece 40 is released by a simple operation of pressing the second knob piece 40 against the first knob piece 20 toward the hose H side. Therefore, the diameter reduction operation of the leaf spring main body 15 can be performed smoothly and reliably.

  In this embodiment, as shown in FIGS. 3 and 8, the engaging claw 31 of the locking piece 25 is provided on the inner surface of the concave portion 43 forming the stopper portion at a position facing the opening 47. A guide portion 49 including an R-shaped portion 49a and a linear portion 49b that guides to the opening 47 side is provided. Therefore, as described above, in order to reduce the diameter of the expanded leaf spring main body 15, the distal end portion of the release tool R is locked to the locking portion 22, and the release tool R is brought into contact with the second knob piece 40. When the second tab piece 40 is pressed against the first tab piece 20 toward the hose H, the engaging claw 31 moves toward the tip 41 side of the second tab piece 40 in the recess 43 and moves to the guide portion 49. The leaf spring main body which abuts and is guided to the opening 47 side along the R-shaped portion 49a and the linear portion 49b of the guide portion 49, and the engaging claw 31 is bent in the width direction by the frictional force. 15, even if it is difficult to move to the opening 47 side of the recess 43 only by the elastic restoring force at both ends, the engaging claw 31 can be moved to the opening 47 and reliably extracted from the recess 43. The diameter reducing operation of the leaf spring body 15 can be performed stably.

  Furthermore, in this embodiment, the locking part 22 is a slit-shaped hole, and the second knob piece 40 is in a state where a part of the locking part 22 overlaps the locking part 22 in a state of being engaged with the locking piece 25. Therefore, the distal end portion of the release tool R can be inserted into the locking portion 22 to be reliably locked, and the release tool R can be reliably brought into contact with the second knob piece 40. The workability at the time of releasing the engagement between the engagement claw 31 and the recess 43 by pressing the second knob piece 40 against the first knob piece 20 toward the hose H can be improved.

  Further, in this embodiment, as shown in FIG. 6, both side corners 53 of the bottom surface 44 of the recess 43 serving as a stopper are formed in a curved shape up to the opening 47 and the locking piece 25. Since the outer periphery of the front end of the engaging claw 31 is rounded, the engaging claw 31 is moved when the diameter of the leaf spring main body 15 is reduced and the engaging claw 31 moves in the recess 43. Is difficult to be caught by the corner 53 of the recess 43, and can be smoothly moved to the opening 47 side.

  In the clamp 10, the engagement between the locking piece 25 and the second knob piece 40 may be released with a tool T such as a pliers or pliers. That is, as shown in FIG. 9, the first knob piece 20 and the second knob piece 40 are picked with a tool T such as a pliers, the two knob pieces 20 and 40 are brought close to each other in the circumferential direction, and are engaged from the recess 43. After removing the engaging claw 31 of the stopper piece 25, the two knob pieces 20 and 40 are further brought close to each other, the second knob piece 40 is slidably contacted with the tapered portion 27a of the locking piece 25, and the concave portion 43 is engaged. The second knob piece 40 is moved in the width direction of the leaf spring main body 15 so as to be separated from the engaging claw 31 of the stop piece 25, and then the tool T is gradually opened, and the first knob piece 20 and the second knob piece. When 40 is expanded and separated, the insertion piece 35 slides in the slit 19 due to the elastic restoring force of the leaf spring body 15, the leaf spring body 15 is reduced in diameter, and the hose H is tightened and fixed to the pipe P. can do.

  FIG. 10 shows another embodiment of the hose clamp according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The hose clamp 10a (hereinafter referred to as “clamp 10a”) of this embodiment has a shape in which the bottom surface 44a of the recess 43 is inclined so as to gradually become deeper toward the opening 47 side (see FIG. 10). In this embodiment, the bottom surface 44a of the recess 43 has an inclined shape as described above over the entire area from the holding portion 45 side (not shown) to the opening portion 47. However, the inclined shape of the bottom surface 44a of the concave portion 43 may be partially provided in a part of the bottom surface 44a, and is at least the peripheral region of the opening portion 47 and is formed in the opening portion 47 toward the opening portion 47 side. It is preferable to form so that it may reach.

  According to this, when the engaging claw 31 of the locking piece 25 is moved to the distal end side of the second knob piece 40 by the release tool R in order to reduce the diameter of the expanded leaf spring main body 15, the bottom surface of the recess 43. By the inclination of 44a, the engaging claw 31 can be easily moved to the opening 47 side, and the engaging claw 31 can be more smoothly extracted from the recess 43, and the diameter of the clamp 10a can be reduced.

  11 to 14 show still another embodiment of the hose clamp according to the present invention. Note that substantially the same parts as those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  As shown in FIG. 12, the hose clamp 10 b (hereinafter referred to as “clamp 10 b”) of this embodiment has a second knob piece 40 with respect to a direction L perpendicular to the center line C in the width direction of the leaf spring body 15. The bent portion is bent at a predetermined inclination angle θ and extends outward in the width direction so as to be separated from the locking piece 25 of the first tab piece 20.

  According to this, as shown in FIG. 13, the surface having the concave portion 43 of the second tab piece 40 is inclined so as to approach the first tab piece 20 as it approaches the locking piece 25, and thus the locking piece 25. When the engaging claw 31 is moved to the distal end side of the second knob piece 40 by the release tool R in a state where the engaging claw 31 of the second knob piece 40 is engaged and held in the concave portion 43, the inclination of the second knob piece 40 causes the engagement. The joint claw 31 can be easily moved to the opening 47 side, the engagement claw 31 can be more smoothly extracted from the recess 43, and the clamp 10b can be reduced in diameter.

  Further, the second knob piece 40 is bent at an inclination angle θ with respect to the direction L perpendicular to the width direction center line C of the leaf spring main body 15, and the second knob piece 40 is separated from the locking piece 25. Since the leaf spring main body 15 is reduced in width so that the width of the slit 19 through which the insertion piece 35 slides is reduced, the second knob piece 40 and the locking piece are extended. While securing the clearance S with 25, the width of the locking piece 25 can be secured to obtain sufficient rigidity, and as a result, the clamp 10 can be made compact (see FIG. 14).

10, 10a, 10b Hose clamp (clamp)
15 Leaf Spring Body 20 First Knob Piece 22 Release Tool Locking Section (Locking Section)
25 Locking piece 29 Tip part 31 Engagement claw 35 Insertion piece 40 Second knob piece 43 Recess 44, 44a Bottom face 47 Opening part 49 Guide part

Claims (4)

It has a leaf spring body formed by being curved in an annular shape,
A slit formed along the circumferential direction and a first tab piece bent radially outward are formed at one end of the leaf spring body,
The other end of the leaf spring body is inserted into the slit and is slidable in the circumferential direction within the slit, and is bent radially outward from the end of the insertion piece. And a second knob piece disposed to face the first knob piece,
In a hose clamp configured such that when the first tab piece and the second tab piece are brought close to each other from a free state in which the leaf spring body is reduced in diameter, the leaf spring body expands against its elastic force. ,
The first tab piece extends toward the second tab piece, protrudes in the width direction of the leaf spring body, and is opposite to the surface of the second tab portion that faces the first tab piece. A locking member provided with an engaging claw that can be engaged on the surface, and a locking member for the locking member, which releases the engagement between the locking piece and the second knob piece, and the tip of the locking member is locked. A stop is provided,
The second knob piece is formed with a stopper portion for holding the state when the engaging claw of the locking piece is engaged with the surface opposite to the surface facing the first knob piece. ,
In the free state where the leaf spring body is reduced in diameter, the locking piece is formed at a position that is shifted in the width direction with respect to the stopper portion and does not overlap in the circumferential direction.
The stopper portion is formed of a concave portion, and a distal end portion side of the second tab piece of the concave portion forms an opening that extends out to the side of the second tab piece, and the engaging claw passes through the opening portion to form the concave portion. It is configured so that the engagement between the locking piece and the second knob piece is released by exiting from
A guide portion for guiding the engaging claw of the locking piece to the opening portion side is provided on an inner surface of the concave portion of the stopper portion at a position facing the opening portion. Hose clamp. It has a leaf spring body formed by being curved in an annular shape,
A slit formed along the circumferential direction and a first tab piece bent radially outward are formed at one end of the leaf spring body,
The other end of the leaf spring body is inserted into the slit and is slidable in the circumferential direction within the slit, and is bent radially outward from the end of the insertion piece. And a second knob piece disposed to face the first knob piece,
In a hose clamp configured such that when the first tab piece and the second tab piece are brought close to each other from a free state in which the leaf spring body is reduced in diameter, the leaf spring body expands against its elastic force. ,
The first tab piece extends toward the second tab piece, protrudes in the width direction of the leaf spring body, and is opposite to the surface of the second tab portion that faces the first tab piece. A locking member provided with an engaging claw that can be engaged on the surface, and a locking member for the locking member, which releases the engagement between the locking piece and the second knob piece, and the tip of the locking member is locked. A stop is provided,
The second knob piece is formed with a stopper portion for holding the state when the engaging claw of the locking piece is engaged with the surface opposite to the surface facing the first knob piece. ,
In the free state where the leaf spring body is reduced in diameter, the locking piece is formed at a position that is shifted in the width direction with respect to the stopper portion and does not overlap in the circumferential direction.
The stopper portion is formed of a concave portion, and a distal end portion side of the second tab piece of the concave portion forms an opening that extends out to the side of the second tab piece, and the engaging claw passes through the opening portion to form the concave portion. It is configured so that the engagement between the locking piece and the second knob piece is released by exiting from
The hose clamp characterized in that the bottom surface of the concave portion of the stopper portion has a portion that is inclined so as to become gradually deeper toward the opening side.   The second tab piece is bent at an angle inclined with respect to a direction perpendicular to the center line in the width direction of the leaf spring body, and outward in the width direction so as to be separated from the locking piece of the first tab piece. The hose clamp according to claim 1 or 2, wherein the hose clamp is extended. The release tool locking portion is a slit-like hole extending in the width direction of the first tab piece,
The second knob piece is formed with a width that at least partially overlaps with the release member locking portion in the width direction of the leaf spring body in a state of being engaged with the locking piece. The hose clamp according to any one of 1 to 3.