JPS63120907A - Annular clamping member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an annular clamp member, and in particular to improving ease of assembly thereof.

A conventional annular clamp member is used to clamp two members fitted together, such as a rubber boot or a hose fitted to a metal cylindrical member, at the fitting portion thereof. For example, as shown in FIG. The embodiments shown are known. This clamp member 200 includes an annular portion 202 formed by a band-shaped metal plate curved into a circular shape, with both ends of the longitudinal direction overlapped and fixed to each other at their inner surfaces. A stopper 204 is attached to this annular portion 202 . The stopper 204 has a U-shape, and is attached to the annular portion 202 at an appropriate distance from the overlapping portion 206 where the two ends are overlapped, and the opposite side walls of the U-shape form a radius with the annular portion 202 in between. It is fixed in a position that projects outward. In addition, the stopper 20 of the overlapping portion 206
A metal lever 208 having a length that reaches the stop 204 is fixed to the outer surface of the side closer to 4.

When clamping an object with this clamp member 200, after fitting the annular portion 202 onto the object, the lever 208 is rotated while reducing the diameter of the annular portion 202, as shown in FIG. The tip is inserted between the side walls of the stopper 204 and overlapped with the outer surface of the annular portion 202 . Then, while maintaining the overlapped state like this, the stopper 20
4 is crimped to fix the lever 20B to the annular portion 202, thereby keeping the annular portion 202 in a reduced diameter state for clamping the object.

Problems to be Solved by the Invention However, the clamp member 200 described above has a complicated structure, is troublesome to manufacture, and is not easy to assemble. In order to overlay the lever 208 on the annular portion 202 and maintain that state, it is necessary to hold the lever 208 against the elastic force of the annular portion 202 and the object tightened by it, which requires a lot of force. , it is necessary to caulk the stopper 204 while applying that force, and assembly is not easy.

If the tightening force of the annular portion 202 is reduced, the force for pressing the lever 208 will be reduced, making assembly easier.
In that case, a problem arises in which the clamping force is insufficient.

Means for Solving the Problems In order to solve the above-mentioned problems, the annular clamp member according to the present invention has an annular clamp member attached to either one of the longitudinal ends of the strip-like plate material, and the other end overlapped with the end of the belt-shaped plate material. A holding portion is provided that holds the end portions immovably in the radial direction of the ring formed by overlapping the end portions, and a holding portion is provided on one of the two end portions, in the direction in which the end portion expands, and on the other side. An engaging pawl extending toward the end is provided, and at least one engaging recess is provided on the other side to engage with the engaging pawl to prevent the ring from expanding.

In the annular clamp member configured as described above,
While both ends of the strip-shaped plate are kept overlapped by the holding part, the clamp member is reduced in diameter by moving the ends away from each other, and the engaging claw and the engaging recess are moved. The object can be clamped by engaging.

The engaging claw is extended in the expanding direction of the end on which the engaging claw is provided, and extends in the direction opposite to the expanding direction with respect to the end opposite to that end. As a result, until it moves to a position corresponding to the engagement recess, it is elastically deformed and the amount of protrusion toward the opposite end becomes smaller, but it does not reach the state corresponding to the engagement recess. When the elastic deformation is restored, the tip of the engaging claw fits into the retaining recess. If the force in the diameter reduction direction is released in this state, the tip end surface of the engagement claw will engage with the stepped portion of the engagement recess that moves in the expansion direction, thereby preventing the clamp member from expanding. .

Effects of the Invention As described above, according to the annular clamp member according to the present invention, an object can be clamped by engaging the engaging claw and the engaging recess while both ends of the plate are held by the holding portion. The clamp member 200
As shown in the figure, the lever 208 is rotated while reducing the diameter of the annular portion 202, and the assembly to the object can be performed more easily than in the case where the lever 208 is fixed with the stopper 204.

Further, the present clamp member has a holding portion, an engaging claw, and at least one engaging recess, and has a simpler structure than the clamp member 200, and can be manufactured at low cost.

Furthermore, since the clamp member 200 has an annular shape from the beginning, it must be inserted into the object from one end before use, whereas the present clamp member requires that the two ends of the plate be separated from each other. It can also be attached to the object from the radial direction, which requires less space and can be assembled more quickly.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows an annular clamp member 10 which is an embodiment of the present invention.
FIG. This clamp member 10 includes an annular member 12 formed by bending a band-shaped stainless steel spring plate (SUS 304) into a circular shape, and having one longitudinal end of the plate overlapped with the other end, and the one end and the other end. A fixing fitting 14 is provided to keep the parts overlapped with each other.

As shown in FIG. 3, near the end of the inner end portion 20 which becomes the inner side due to the overlapping, there is a long hole 22 and an isosceles triangular through hole 24 extending in the circumferential direction from the end side.
is formed. The through hole 24 is formed such that its apex is located on the elongate 22 side, and its base is perpendicular to the circumferential direction of the annular portion 12 .

On the other hand, as shown in FIG. 4, the outer end 26, which becomes the outer side due to the above-mentioned overlapping, has an elongated section 28 extending in the circumferential direction from the end. Isosceles triangular engagement hole 30. An oval-shaped tool engagement hole 32 is formed. The elongated hole 28 is formed to have the same dimensions as the elongated hole 22, and the retaining hole 30 is formed in the same attitude as the through hole 24, and functions as an engagement recess as described later. Further, the tool retaining hole 32 has a side wall on the retaining hole 30 side that bulges outward in the radial direction of the annular member 12 to form a hook portion 34 .

The fixing fitting 14 is formed by bending a material 38, which is made by punching a steel plate into the shape shown in FIG. As shown in FIG. 5, the main body portion 40 has a U-shaped cross section and is curved so that the clamp member 10 has a radius of curvature that is approximately equal to the radius of curvature of the object to be clamped. There is. A retaining portion 42 that is engaged with the inner end portion 20 is formed at one end in the longitudinal direction of the main body portion 40, while an inner end portion 20 and an outer end overlapped with each other are formed at the other end. A holding portion 44 is formed to hold the portion 26 in the overlapping state.

These engaging portions 42. Both of the holding parts 44 have a pair of ears 46 extending from both sides parallel to the longitudinal direction of a portion of the material 38 constituting the main body 40 .
It is bent towards the center of the

Each ear piece 46 extends from the side edge, and when bent toward the center of the main body 40, the ear piece 46 has a dimension slightly larger than the sum of the inner end 20 and the outer end 26 with respect to the main body 4o. The base end portions 48 are opposed to each other with a large distance between them, and the base end portions 48 extend toward the other end of the main body portion 40 in a direction parallel to the longitudinal direction of the main body portion 40 of the base end portions 48. The claw portion 50 has a right triangular shape and has an oblique side that is inclined with respect to the extending end surface. The end surfaces of each pair of ear pieces 46 are bent so as to face each other with a very small gap between them. Annular part 5 formed
2.54, and isosceles triangular engaging claws 56.58 formed by the pair of claw portions 50.

The tips of these engaging claws 56 and 58 are bent toward the main body 40 side so that they are in contact with the main body 40, with a pole smaller than the thickness of the plate material constituting the annular member 12 (separated by a slight gap, or in contact with the main body 40). The engaging claw 58 of the holding portion 44 is located at the edge (step) of the engaging hole 30 of the outer end portion 26, as will be described later.
and prevents the annular member 12 from expanding. In this embodiment, a holding portion that holds the inner end portion 20 and the outer end portion 26 in an overlapping state and an engaging pawl are provided integrally, and the engaging hole 30 is provided with an engaging claw. The annular member 12 is formed at a position where the annular member 12 can clamp the object with sufficient clamping force when engaged with the claws 58 .

Furthermore, caulking pieces 60 are formed on both sides of the longitudinally intermediate portion of the main body portion 40, respectively. This caulking piece 60 has an extending portion 6 extending perpendicularly to the main body portion 40.
2, and a retaining portion 64 bent from the extending portion 62 toward the center of the main body portion 40. These caulking pieces 6
0 means that the longitudinal dimension of the main body 40 is the same as the elongated hole 22.2.
It is slightly shorter than 8, and these caulking pieces 60
゜Engagement part 42. The holding part 44 has a caulking piece 60 and each part 42.
．． The distances from the tips of the engaging claws 56 and 58 of 44 are respectively,
The distance between the elongated hole 22 and the through hole 24 of the inner end portion 20 is approximately equal to the distance between the elongated hole 28 of the outer end portion 26 and the engagement hole 30.

Furthermore, each of the extending portions 62 of the pair of caulking pieces 60 is formed with a circular through hole 66 that determines the portion to be bent during caulking.

Further, three pairs of protrusions 68 are formed on the upper surface of the main body portion 40. These protrusions 68 are formed on both sides of the caulking piece 60 in the longitudinal direction and on a portion of the holding portion 44 facing the annular portion 54, respectively.

The fixing metal fitting 14 formed as described above is attached to the inner end portion 20 in advance as shown in FIG. 7 prior to clamping of the object by the present clamping member 10. That is, the inner end portion 20 is inserted into the annular portion 52 of the engaging portion 42 and the engaging claw 56 is fitted into the through hole 24, thereby attaching it to the fixture 14. Although the gap between the tip of the engaging claw 56 and the main body portion 40 is smaller than the thickness of the inner end portion 20, the movement of the inner end portion 20 from the engaging portion 42 side to the holding portion 44 side is caused by the engaging claw 56. The movement to the other side is allowed by the elastic deformation of the inner end 20.
This is prevented by engagement between the tip of the engaging claw 56 extending in the diameter reduction direction and the edge of the through hole 30.

By attaching the fixture 14 to the inner end portion 20 in this manner, the holding portion 44 provided on the fixture 14.
The retaining claw 58 is equivalent to being provided integrally with the inner end portion 20, and the engaging claw 58 is the same as being provided integrally with the inner end portion 20.
By being bent toward the 0 side and facing the engaging claw 56 extending in the diameter reduction direction of the inner end 20, the inner end 20
It will be made to extend in the direction of expansion. Furthermore, the engaging claw 56. Caulking piece 60 and through hole 24. Since the elongated holes 22 are formed so that their distances are approximately equal, when the fixing metal fitting 14 is engaged with the inner end portion 20, the elongated holes 22 are positioned exactly between the pair of caulking pieces 60. state.

Clamping of an object by the clamp member 10 configured as described above is performed in the following manner.

First, the annular member 12 to which the fixture 14 is attached is wrapped around the part of the object to be clamped, and the eighth
As shown in the figure, the engaging claw 5 is inserted into the annular part 54 of the holding part 44 so as to overlap the outer surface of the inner end part 20, and the engaging claw 5 is inserted into the elongated hole 28.
8 to form an annular shape. This insertion is done at the inner end 20
In the same manner as the insertion into the annular portion 52, this is allowed by the elastic deformation of the engaging claw 58, and the force applied to the outer end portion 26 when the engaging claw 58 is in a state where it can be inserted into the elongated hole 28. When released, the outer end 26 is kept overlapped with the inner end 20 by the holding part 44, and the annular member 12 is prevented from moving radially outward, and the engaging claw 58 and the elongated hole are The engagement with 28 prevents the annular member 12 from expanding. The engaging claw 58 extends in the direction in which the inner end portion 20 expands;
In other words, since it is formed in the direction of diameter reduction of the outer end 26, when the force applied to the outer end 26 is released,
The clamp member 10 prevents the annular member 12 from expanding by engaging with the distal end of the outer end of the elongated member 28 that moves in the expanding direction due to the elastic force of the annular member 12. This results in a temporary fixing state in which the diameter is larger than when clamping an object.

In this state, as shown in FIG.
0, the diameter of the annular member 12 is reduced and the object is clamped. The tool 70 includes a pair of arm portions 74 rotatably connected by a shaft 72, and an engaging protrusion 76 formed at the tip of each arm portion 74 is connected to the hook portion 34 of the tool retaining hole 32. After engaging with the tightening pieces 60, the arm portions 74 are rotated in a closing direction to reduce the diameter of the annular member 12. One of the arm portions 74 may be engaged with the annular portion 52 of the engagement portion 42, as shown by the two-dot chain line.

After the engagement claw 58 is fitted into the engagement hole 30, the tool 7
If 0 is removed, the elastic force of the annular member 12 causes the tip of the engaging claw 58 to engage with the edge of the retaining hole 30 as shown in FIG. 10, thereby preventing the annular member 12 from expanding. The object will be clamped. Also, at this time, Chodai 28
is located between the caulking pieces 60, exactly overlapping the elongated portion 22 formed on the inner end portion 20, and the caulking pieces 6
0 to fit the engaging portion 64 into the elongated hole 28.22 as shown in FIG. By doing this, in the unlikely event that
Even if the engagement claw 58 comes off the engagement hole 30, the annular member 1
The spread of No. 2 will be reliably prevented. Note that since the through hole 66 is formed in the caulking piece 60, the caulking piece 60 can be easily bent at a constant position (one position of the through hole 66). Further, the inner end portion 20 has a protrusion 6 formed on the main body portion 40 as shown in FIG.
8 lifts off the main body 40 and the outer end 26
Since it is pushed to the side, the caulking piece 60 that is fitted from the outer end 26 side can also reliably engage the inner end 20 located below the outer end 26.

In this way, the clamp member 10 of this embodiment has the outer end 2
6 is engaged with the engaging claw 58 of the fixing metal fitting 14 to temporarily secure the object, and then the tool 70 reduces the diameter of the annular member 12 to clamp the object. Since the diameter of the annular member 12 is larger than the state, almost no force is required to engage the elongated member 28 and the engaging claw 58, and the tool 70 is used to reduce the diameter of the annular member 12 from the temporarily fixed state. Therefore, the worker can easily perform the assembly work without hurting his/her hands.

・In addition, by making assembly easier in this way, efficient ramp work is possible, and the tightening force of the annular member 12 can be increased by using tools. is obtained.

Furthermore, in this embodiment, the holding part and the engaging claw are provided on the fixture 14 that is separate from the annular member 12, which has the effect of improving the material yield compared to the case where they are provided integrally. is obtained.

In the above embodiment, in order to increase the mass productivity of the fixing metal fitting 14, the engaging claw 58 was formed by fitting the claw portions 50 formed on the pair of ear pieces 46, respectively.
As shown in FIGS. 3 to 15, the fixture 80 may be provided with an integral engagement claw 82. This fixing fitting 80 is made of a material 8 made by punching a steel plate into the shape shown in FIG.
4 is bent along each line indicated by a two-dot chain line, and the seam of the material 84 is placed on the main body portion 86 side. By making the engaging claw 82 integral in this manner, the effect that the engagement with the engaging hole 30 becomes more reliable can be obtained. Note that in the fixture 80 of this embodiment, the 6th protrusion is omitted. The other parts are the same as those in the previous embodiment, and corresponding parts are given the same reference numerals and detailed explanations will be omitted.

Further, if the caulking piece 60 is provided, the inner end and the outer end can be more securely fixed, but it is not essential, and the caulking piece is omitted as in the fixing fitting 90 shown in FIG. You may.

Furthermore, in each of the above embodiments, the fixing fittings 14°80.9
0 and the inner end portion 20 were connected by engagement between the engaging claw and the through hole 24, but as shown in the fixing fitting 92 shown in FIGS. 18 to 20, the inner end portion 94 (the 23 and 24) by spot welding.

This fixture 92 has a pair of caulking pieces 96 formed at one end in the longitudinal direction, a holding part 100 having an engaging claw at the center thereof, and a main body part at the other end. 102 between the inner end 94 and the outer end 1
04 (see FIGS. 21 and 22) is provided with an annular portion 106 having a gap slightly larger than the combined thickness. Further, the inner end portion 94 is formed with an elongated hole 108 into which the caulking piece 96 is inserted, as shown in FIG. is bulged outward. Further, as shown in FIG. 21, the outer end portion 104 includes an isosceles triangular engagement hole 110 and a long hole 10 in order from the end.
A long hole 112 having the same dimensions as 8 is formed. Note that the end of the elongated hole 112 on the engagement hole 110 side is bent and raised to form a hook portion 114.

The inner end portion 94 is inserted into the fixing fitting 92 from the annular portion 106 side, and welded to the main body portion 102 with the elongated portion 108 positioned between the caulking pieces 96. In this state, the main body portion 102 of the fixture 92 is housed inside the outwardly bulged portion of the inner end portion 94 . The outer end portion 104 is inserted into the holding portion 100 from the caulking piece 96 side, and in this state, a jig is engaged with the hook portion 114 and the annular portion 106 to reduce the diameter of the clamp member and engage with the engagement hole 110. After engaging the mating claws 98, the caulking piece 96 is caulked and fitted into the long 108°112. The tip of the outer end portion 104 is inserted into the annular portion 106 to prevent it from floating up.

In addition, in the clamp member 10 explained based on the said FIGS. 1-12, instead of providing the protrusion 68 in the fixing metal fitting 14, the part in which the elongated hole 22 of the inner end part 20 was provided bulges outward. Further, such a protrusion 68 and a bulge are not essential and may be omitted.

Further, in each of the above embodiments, the holding portion and the engaging claw are provided on a fixture separate from the annular member, but they may be provided integrally with the annular member.

Further, in each of the above embodiments, the holding part and the engaging claw are provided integrally, but they may be provided separately.In short, the holding part is provided at either the inner end or the outer end. At the same time, it is sufficient to provide an engaging pawl on either one and an engaging recess on the other.

Further, in each of the above embodiments, only one retaining hole is provided with which the engaging claw is engaged, but a plurality of retaining holes are provided so that the diameter of the clamp member in the reduced diameter state can be changed in multiple stages. Further, the diameter reduction of the clamp member may be performed manually by an operator without using a tool.

Although not illustrated in detail, the present invention can be implemented in various modifications and improvements based on the knowledge of those skilled in the art.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an annular clamp member according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the inner end and the outer end of the clamp member are connected by a fixture. FIG. 3 is a front view showing the inner end, and FIG. 4 is a front view showing the outer end. FIG. 5 is a perspective view showing the fixing fitting. FIG. 6 is a plan view showing the material of the fixing fitting. FIG. 7 is a perspective view showing a state in which the fixing fitting is attached to the inner end. FIG. 8 is a perspective view showing a temporarily fixed state in which the engaging claw of the fixing member and the long outer end are engaged, and FIG. 9 is a view showing the diameter reduction operation using a tool. FIG. 10 is a perspective view showing a state in which the engaging claw of the fixture and the retaining hole at the outer end are engaged. FIG. 11 is a front cross-sectional view showing a state where the inner end and the outer end are joined by the fixing metal fitting, and FIG. 12 is a front sectional view showing the state in which the inner end and the outer end are joined together by the fixing metal fitting, and FIG. FIG. 3 is a front sectional view showing the inserted state. FIGS. 13 to 15 are a plan view, a side view, and a front view, respectively, showing another embodiment of the fixture. 16th
The figure is a plan view showing the material of the fixing fitting. FIG. 17 is a plan view showing still another embodiment of the fixture. 18th
20 through 20 are plan views showing still another embodiment of the fixture. They are a side view and a front view. FIGS. 21 and 22 are a plan view and a front view showing the outer end joined to the inner end by the fixing fitting, and FIGS. 23 and 24 are a plan view and front view showing the inner end. It is a diagram. FIG. 25 is a front view showing a conventional annular clamp member in an unclamped state, and FIG. 26 is a front view showing the conventional annular clamp member in a clamped state. 10: Annular clamp member 12: Annular member 14: Fixing fitting 20: Inner end 26: Outer end
30: Engagement hole 44: Holding part 58: Engagement claw 8
0: Fixing metal fitting 82: Engaging claw 90.92=Fixing metal fitting 94: Inner end 98: Engaging claw 10
0: Holding part 104: Outer end 110: Engagement hole Fig. 3 Fig. 4 Fig. 11 Fig. 12 Fig. 17 Fig. 20 Fig. 21 Fig. 23 Fig. UZ

Claims (1)

[Claims] A holding part is provided at either of the longitudinal ends of the strip-shaped plate material to hold the other end overlapped with that end so that it cannot move in the radial direction of the ring formed by the overlap. At the same time, one of the two ends is provided with an engaging claw that extends in the expansion direction of the end and toward the other end, while the other is provided with an engaging claw that engages with the engaging claw and extends toward the other end. An annular clamp member comprising at least one engagement recess that prevents the ring from expanding.