JP3329381B2 - Reusable clamps with pull-down operation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid supply hose, a dust-proof bellows, a shaft boot and other fixed objects made of an elastic material such as rubber or synthetic resin, and a corresponding joint pipe or opening / closing cock. The present invention relates to a draw-drawing-operation-type reusable clamp that is fastened and fixed to a connection circumferential surface of a rotating shaft and other devices.

[0002]

2. Description of the Related Art A clamp band made of stainless steel or other metal band material cut to a certain length is wound into a circular ring shape partially overlapping one end side and the other end side to form a three-dimensional shape. In addition, as a clamp member of a pull-drawing operation type for manually forcibly deforming and contracting the diameter of the clamp band by pulling-down operation such as a pliers or nippers, JP-A-4-210188, JP-B-5-63641, Patent No. 2758968, No. 2
No. 758969 has been proposed, each of which has a form in which there is no overhanging portion which is crushed by a special caulking tool, so that the weight distribution in the circumferential direction is largely non-uniform and does not interfere with surrounding members in use. In all respects, they are all in common.

[0003] Among them, in the case of Japanese Patent Application Laid-Open No. Hei 4-210188, in particular, the vicinity of the first end (13) in the outer overlapping portion (22) of the band body (11) and the intermediate portion (23) of the band body (11). ), The first and second tool hooking portions (40) and (45) are both formed to protrude outward, and furthermore, the temporary fixing projections (55) which protrude outward from the inner overlapping portion (21). ) And a receiving portion (58) of a projection receiving hole (57) that opens to the outer overlapping portion (22). The temporary fixing means (59) is provided on the band body (11). It is considered to be a known invention that most closely resembles the invention.

[0004]

However, according to the structure of the known invention, the provisional fixing projection (55) is also engaged in the provisional engagement with the receiving portion (58) of the projection receiving hole (57). The locking projections (35) and (35) separate from the first and second locking holes (30a) and (30b) enter and lock.

[0005] Therefore, the drawing operation is performed by drawing from the temporary fixing state shown in FIGS. 1 to 3 to a so-called final tightening state shown in FIGS. To the stop hole (30a), the locking projection (35) separate therefrom
In the transition process in which (35) enters the second and third locking holes (30b) (30c), these inner overlapping portions (2
Projection group (35) (35) projecting outward from 1)
(55) is strongly pushed inward by the outer overlapping portion (22), and the temporary fixing projection (5)
5) The back (55b) forms a smooth inclined surface,
The bulging portions (37) (3) of the locking projections (35) (35)
7), the projections (35), (35), and (55) may buckle improperly in combination with the smooth arch shape.

As shown in FIG. 10, the front walls (36) and (36) of the locking projections (35) and (35) have a protruding height greater than the plate thickness of the band body (11) and have an outer overlapping portion. It rises in a substantially vertical direction from the surface of (22), and in the final tightening state, it is overlapped with the front edges (31) and (31) of the second and third locking holes (30b) and (30c). In addition to the terminal overlapping portion (22), the first end (13) of the outer overlapping portion (22) does not rise, so that the terminal holding portion (50) projects outward from the inner overlapping portion (21) in the tunnel. It is also to be inserted into.

For this reason, it is impossible to manually release the final tightened state shown in FIGS. 6 to 10 and to use the clamp again, which limits its use. In other words, in the above-mentioned known invention, in the maintenance / inspection work of the equipment, if the hose or the boot needs to be replaced, the fastening state of the clamp is released and reuse is not considered at all.

[0008]

SUMMARY OF THE INVENTION The present invention is intended to improve such a problem. For this purpose, a clamp band made of a metal band plate material cut to a fixed length is provided on one end side of the bent band. The inner superposed portion becomes the same as the outer superposed portion which becomes the other end of the bend, and is rolled and bent into a circular ring shape partially overlapping by a certain amount,

The diameter of the clamp band is forcibly contracted and deformed, so that a fluid feeding hose made of an elastic material such as rubber or synthetic resin, a dustproof bellows, a boot for a shaft, and other fixed objects can be fixed. In the clamp fittings that are fastened and fixed to the connection circumference of various devices corresponding to this,

[0010] The cut end of the inner polymerized portion is cut out as a nose having a fixed width smaller than a fixed width of the metal strip material,

In the inner overlapping portion, in order from the nose toward the direction in which the intermediate portion of the clamp band does not overlap, the fixed claw receiving hole, the first tool receiving hole for clamping the clamp band, and the preliminary tool for releasing the clamp band are sequentially provided. Distribute the receiving holes in each opening,

An opening edge of the fixed claw receiving hole on the side adjacent to the nose is cut and raised obliquely outward at a predetermined angle as a fastening claw of a clamp band.

The opening edge of the first tool receiving hole adjacent to the fixed claw receiving hole is used as a first tool receiving claw, and the opening edge of the spare tool receiving hole adjacent to the first tool receiving hole is used as a spare. While cutting and raising obliquely outward at a certain angle as tool receiving claws,

In the outer overlapping portion, in order from the other end of the outer overlapping portion toward the direction in which the intermediate portion is present, the receiving hole for the fastening claw, the second tool receiving hole for clamping and releasing the clamp band, and the nose. Distribute the openings of the receiving slots,

The opening edge adjacent to the other end of the clamp band in the fastening claw receiving hole is adjacent to the other end of the clamp band as a fixed claw. An opening edge of the tool receiving hole on the side adjacent to the fastening claw receiving hole is formed as a second tool receiving hole for clamping and releasing the clamp band so as to be obliquely outward at a predetermined angle facing the first tool receiving claw. ,

[0016] By pulling down the action claw of the drawing operation tool engaged with both the first tool receiving claw of the inner overlapping portion and the second tool receiving claw of the outer overlapping portion, the outer overlapping portion is drawn. With the fixed claw of the inside overlapped with the fastening claw of the inner overlapping part, it was locked and locked in the fastening state of the clamp band,

The working claw of the operating tool engaged with both the second tool receiving claw of the outer overlapped portion and the spare tool receiving claw of the inner overlapped portion in the fastened state is drawn and drawn, whereby: It is characterized in that it has been determined that the above-mentioned fastening state can be intentionally released.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a clamp according to the present invention; FIG. Reference numeral 7 also shows a product which is wound and bent three-dimensionally, and a use state thereof. As a material of the clamp, a constant thickness (T) (for example, about 0.7 to 1.0 mm) and a constant width (W) ( For example, stainless steel (for example, SUS301 or SUS304) having a thickness of about 7 to 10 mm or another metal strip (M) is adopted. The fixed length (L) corresponding to the thickness of the fixed object (10) such as the bellows for the shaft and the boot for the shaft is appropriately cut.

(11) is obtained by winding and bending the metal strip material (M) cut into a fixed size into a circular ring shape as viewed from the front and the rear, thereby forming the fixed object (10). It is a clamp band that directly serves as a tightening action, and partially overlaps by a fixed amount (X) so that the other end side is also circumscribed on one end side of the bend. In other words, the clamp band (11) is in an overlapped state in which one end side of the bent portion forms an inner overlapping portion (11a), and the other end portion of the bent portion forms an outer overlapping portion (11b). (11c) shows an intermediate portion of the remaining non-overlapping clamp band (11).

Needless to say, the clamp band (11) has a constant width (W) of the metal band material (M) itself, but only one of the cut ends of the inner superposed portion (11a) is made of the metal band material (M). The notch (12) having a constant width (W1) (for example, about 2.5 to 3.0 mm) narrower than the constant width (W) of M) is notched and left. (L1) indicates the overhang length of the nose (12) extending on the longitudinal center line of the metal strip material (M), for example, about 7-1.
It is dimensioned to 0 mm.

In this case, the tip of the nose (12) is formed as a convexly curved pilot piece (12a), and is raised outward by at least a dimension substantially equal to the thickness (T) of the metal strip material (M). I have. Therefore, the pilot piece (12a) of the nose (12) is connected to an outer overlap portion (11
By receiving in the nose receiving slot of b), the inner overlapping portion (11a) and the outer overlapping portion (11b) of the clamp band (11) can be accurately aligned with each other without a risk of lateral displacement. Can be overlapped quickly.

The parts (13), (15), (16) and (17) are located on the inner overlapping portion (11a) of the clamp band (11), and are separated from the nose (12) on one side of the cutoff to the intermediate part (11c). A lock pin receiving hole for winding and bending forming, a fixed claw receiving hole, a first tool receiving hole for fastening a clamp band, and a spare tool receiving hole for releasing a clamp band, which are sequentially distributed in the opening direction in the presence direction, The entire opening width is constant (for example, about 3.5 to 5.0 m).
m) and is scattered on the longitudinal center line of the metal strip material (M).

First, the lock pin receiving hole (13) for winding and bending forms receives a locking pin planted from a circumferential surface of a core metal roll (not shown) for winding and bending, and engages with the locking pin. The clamp band (11) is used to form a three-dimensional shape by winding the clamp band (11) into a circular ring shape by rotating the cored bar roll in the stopped state, and the protruding base end of the nose (12). The opening is formed in a circular or elliptical shape in plan view while being located near the portion.

Next, the fixed claw receiving hole (15) is opened at a position relatively far from the locking pin receiving hole (13) as an elliptical shape in a plan view. The opening edge on the side adjacent to (13) is entirely cut and raised by the metal strip material (M) so that the opening edge is at least approximately the same as the thickness (T) of the metal strip material (M). Moreover, it is shaped as a fastening claw (19) bulging obliquely outward at a certain angle (β).

A fastening claw (19) which protrudes from the opening edge of the fixed claw receiving hole (15) as a high-strength transverse convex shape is engaged with a fixed claw (described later) of the outer overlapped portion (11b) with a bite. Clamp band (1
1) can be fixedly maintained as a final fastening state.

Further, the first tool receiving hole (16) for clamping the clamp band is open as a long hole in plan view, and the opening edge on the side adjacent to the fixing claw receiving hole (15) has high strength. Cut and raised into a convex shape with a transverse cross section, swells at least at a dimension substantially equal to the thickness (T) of the metal strip material (M), and at an oblique outward direction at a certain angle (γ). It is shaped as a first tool receiving claw (20).

In this case, the first tool receiving claw (20) and the fastening claw (19) are difficult to distinguish at a glance, and in order to prevent erroneous recognition, a spare tool receiving hole in the first tool receiving hole (16). The opening edge on the side adjacent to the hole (17) is cut out in a non-circular shape such as a V-shape or a straight line in plan view. Using the non-circular shape as a mark, an operation tool described later can be inserted into the first tool receiving hole (16) without error.

The spare tool receiving hole (17) for releasing the clamp band is open in an elongated, elliptical shape in plan view, and the opening edge on the side adjacent to the first tool receiving hole (16) also has high strength. By being cut and raised into a transversely convex shape, at least a dimension substantially equal to the thickness (T) of the metal strip material (M) and at a constant angle (δ)
Are formed as spare tool receiving claws (21) which bulge obliquely outward.

On the other hand, the receiving hole (22) of the fastening claw (19) is sequentially formed in the outer overlapped portion (11b) of the clamp band (11) from the other end of the clamp band (11) toward the direction in which the intermediate portion (11c) exists. ), A second tool receiving hole (23) for fastening and releasing the clamp band, and an elongated receiving hole (24) of the nose (12) are distributed. These are all constant opening widths (for example, about 3.5 to
5.0 mm), and of course it is scattered on the longitudinal center line of the metal strip material (M).

First, the receiving hole (2) of the fastening claw (19)
2) is open at the position closest to the cut-off other end of the outer superposed portion (11b) as an ellipse in a plan view, and in particular, the opening edge on the side adjacent to the cut-off other end has high strength crossing. Is cut and raised into the shape of a convex curve, so that the metal strip material (M) has at least a dimension substantially equal to the thickness (T) of the metal strip material and at the same time, swells obliquely inward at a certain angle (ε). It is shaped as a nail (25).

That is, the fixing claw (25) is protruded obliquely outward from the inner overlapping portion (11a).
Under a certain angle (ε) corresponding to 9), the clamp band (11) is depressed diagonally in the opposite direction (inward) from the outer overlapping portion (11b) of the clamp band (11), and the fixed claw (25) Engages with the fastening claw (19) and engages the clamp band (11) with the inner overlapping portion (11).
On the plane of overlap between a) and the outer overlapped portion (11b), it can be locked and locked in a final flat fastening state.

Next, the second tool receiving hole (23) for fastening and releasing the clamp band is provided in the fastening claw receiving hole (2).
2), an opening is formed as a long hole in plan view, and the opening edge on the side adjacent to the fastening claw receiving hole (22) is cut and raised into a high-strength transversely convex shape. As a result, the second tool receiving claw (26) bulging outward at an angle of at least substantially equal to the thickness (T) of the metal strip material (M) at a constant angle (θ). It is shaped.

The second tool receiving claw (26) is opposed to the first tool receiving claw (20) so as to face the first tool receiving claw (20) of the inner overlapping portion (11a). It is needless to say that the angle (θ) is maintained obliquely outward from the outer overlapping portion (11b) of the clamp band (11) while maintaining the angle (θ).

In that case, the second tool receiving hole (2
The opening edge on the side adjacent to the nose receiving slot (24) in 3) is cut out in a non-circular shape such as a V-shape or a straight line in a plan view, so that the second tool receiving claw (26) becomes the second tool receiving claw (26). It is preferable to correctly recognize that it corresponds to the first tool receiving claw (20) of the one tool receiving hole (16). The non-circular shape is also used as a mark so that an operation tool described later can be inserted into the second tool receiving hole (23) without error.

Further, the receiving slot (2) of the nose (12)
4) accepts the nose (12) in the process of shifting to the fastening state of the clamp band (11), so that no step is formed on the clamping action surface of the clamp band (11), and therefore, in plan view. The opening is large as a rather elongated oval.

At this time, the tip of the nose (12) serves as a pilot piece (12a), which acts as a pilot to enter the nose receiving slot (24) as soon as possible. (11a) and the outer overlapped portion (11b) do not relatively displace in the lateral direction, and as a result, they can be accurately matched to the overlap state.

Since the present invention is an open type clamp having the above-mentioned structure, it is used for a fluid supply hose and a dustproof bellows made of an elastic material such as rubber or synthetic resin.
When fastening the shaft boots and other objects to be fixed (10) to the corresponding connection pipes of the joint pipes, opening and closing cocks, rotating shafts and other various devices (31), the clamps described above are used. The band (11) is wrapped around the connection circumferential surface of the fixed object (10) from the diametrical direction, and a pair of left and right working claws (32) provided at the distal end of the drawing-type operating tool (P) as shown in FIG. ) With its clamp band (11)
The first and second tool receiving holes (16) and (23) are inserted into the first and second tool receiving claws (20) and (26).

Then, the pair of right and left handles (33) of the operating tool (P) is strongly squeezed and tightened, so that the two action claws (32) are turned around the assembly fulcrum shaft (34) as shown in FIGS. To the clamp band (1
The diameter of 1) is forcibly shrunk and deformed, and in the process, the nose (1) forming one end of the cut-off portion of the inner overlapping portion (11a) is formed.
The pilot piece (12a) of 2) is connected to the outer overlapping portion (11).
It travels along the nose receiving slot (24) of b).

On the other hand, as the drawing operation is continued,
A fixing claw (25) located at the other end of the cut off of the outer overlapped portion (11b) and a fastening claw (1
9) cross over each other so that the two overlapping portions (11a) and (11b) finally bite and lock on the overlapping plane, and the clamp band (11) is moved to the position shown in FIG. As a result, the object to be fixed (10) is locked in a flat fastening state as shown in FIG.
It is fixed to the connection circumferential surface of 1) in a tightened state.

After the fixed state is maintained in the above-mentioned fastening state, the both action claws (32) of the operating tool (P) are moved outward from the first and second tool receiving holes (16) (23) of the clamp band (11). Needless to say, extracting

Further, in the clamp according to the present invention, a spare tool receiving hole (17) for release is also formed in the overlapping portion (11a) inside the clamp band (11).
The opening edge serves as a spare tool receiving claw (21).
Since the second tool receiving claw (26) of the second tool receiving / closing hole (23) for fastening and releasing at the outer overlapped portion (11b) is installed in parallel with the second tool receiving claw (26) in an oppositely inclined state, the above fastening state is intentionally performed. And the clamp can be reused.

That is, in performing the releasing operation, as shown in FIG. 13, the spare tool receiving hole (17) of the inner overlapping portion (11a) and the second tool hole of the outer overlapping portion (11b) are used.
The double action claw (32) of the drawing-type operating tool (P) is also inserted into the tool receiving hole (23), and this is engaged with the spare tool receiving claw (21) and the second tool receiving claw (26). It is.

When the drawing operation is performed, the bite-locking state between the fixed claw (25) of the outer overlapped portion (11b) and the fastening claw (19) of the inner overlapped portion (11a) is changed as shown in FIG. Is forcibly released as shown in FIG.
0) can be removed and replaced, and the necessity of maintenance and inspection can be dealt with, and the use of the clamp fitting is expanded.

In the clamp fitting in which the clamp band (11) is wound and formed into a three-dimensional ring with a relatively small diameter as in the illustrated embodiment, the above-mentioned fastening claw (19) is caused by its small radius of curvature. ) And the fixed claw (25) are bitten and locked, and it is difficult to manually forcibly release the fastening state. Therefore, a release spare tool is provided on the inner overlapping portion (11a) of the clamp band (11). The need to install receiving holes (17) and spare tool receiving claws (21) bulging from the opening edges thereof increases.

In any case, in the present invention, the fixing claw (25) which is depressed obliquely inward from the other end position of the outer overlapping portion (11b) of the clamp band (11) is also separated from the inner overlapping portion (11a). The fastening claws (19) which protrude in the opposite obliquely outward direction are engaged with each other by biting, and the fastening state of the clamp band (11) is changed to the overlapping portion (11a).
Since the locking portion is fixed on the overlapping plane of (11b), there is no possibility that the fixing claw (25) of the outer overlapping portion (11b) is warped and floated by accident, and as a result, the characteristic described at the beginning is obtained. As in the invention of Japanese Patent Laid-Open No. 4-210188, the terminal holding portion (50) is formed so as to project from the inner overlapping portion (21) into a special tunnel shape, and the first end (13) of the outer overlapping portion (22) is formed therein. Need not be inserted, and it is possible to perform a precondition that intentional and forcible release from the above-mentioned fastening state is possible.

Moreover, in the present invention, the fastening claws (1
The part where the 9) and the fixed claw (25) are engaged with each other by biting
The first tool receiving claw (20) of the inner overlap portion (11a)
And the second tool receiving claw (2) of the outer overlapping portion (11b)
6), and is located inside the so-called inner side of the fixed overlap distance (D), so that the first tool receiving claw (20) of the inner overlapping portion (11a) is opposite to the fastening claw (19). An additional tool receiving claw (21) for releasing the clamp band is added to the adjacent side, so that the clamp band (11) is fastened using the drawing-type operating tool (P) for fastening the clamp band. Can be canceled intentionally.

In this regard, in the configuration of the above-mentioned Japanese Patent Application Laid-Open No. Hei 4-210188, the first and second tool hook portions (40) and (45) are provided.
At a position far away outward from the mutual spacing distance (w) of the band body (11), the inner overlapping portion (2) of the band body (11).
Projection group (35) (35) projecting outward from 1)
(55) are the first to third locking holes (30a), (30b), and (30c) also distributed in the outer overlapping portion (22).
And the first end (13) of the outer overlapping portion (22) is overlapped with the inner overlapping portion (2).
Since the terminal holding portion (50) raised from 1) is inserted into the tunnel, the arm tip portion (6) of the tool (60) is manually forcibly released from its fully tightened state shown in FIGS.
2a) and (63a) by the first and second tool hooks (40) (4)
In the case where the first end (13) is engaged with 5) and the drawing operation is performed, the first end (13) enters the tunnel of the terminal holding portion (50) further deeply, and the final tightening state is intentionally released. It is impossible.

More specifically, by disposing the first tool receiving claw (20) of the inner overlapping portion (11a) in the present invention at the position of the preliminary tool receiving claw (21) for releasing the clamp band, the separate tool receiving claw (21) is provided. Spare tool receiving claw (2
The installation of 1) is omitted, and the first and second tool receiving claws (20)
(26) Double acting claw (3
It is conceivable to intentionally release the clamped state of the clamp band (11) by engaging 2), but when locking the clamp band (11) to the clamped state, both of the operating tool (P) can be locked. The working claw (32) must be greatly expanded, and a large force is required for the drawing and drawing operation. As a result, a large amount of clamps cannot be fastened with light labor.

In the structure of the present invention, the clamp band (1)
The first overlapped tool receiving claw (20) and the separate preliminary tool catch claw (2) for release are provided on the inner overlapping portion (11a) of (1).
The provision of 1) has a special technical meaning in that such a problem can be improved.

[0050]

As described above, according to the structure of the present invention, the clamp band (11) made of the metal strip material (M) cut to a predetermined length (L) is turned into one side by bending and bending one side. The part (11a) is wound and bent into a circular ring shape in which the outer overlapping part (11b) which is the same as the other end side of the curving and bending partly overlaps by a certain amount (X), and becomes three-dimensional.

The diameter of the clamp band (11) is forcibly shrunk and deformed by hand, so that a fluid feeding hose made of an elastic material such as rubber or synthetic resin, a dustproof bellows, a shaft boot, and other fixed members are fixed. In a clamp fitting for fastening an object (10) to a connection circumferential surface of various devices (31) corresponding thereto,

The cut end of the inner superposed portion (11a) is cut out as a nose (12) having a fixed width (W1) smaller than a fixed width (W) of the metal strip material (M).

In the inner overlapping portion (11a), the fixed claw receiving hole (15) and the clamp are successively arranged from the nose (12) in the direction of the non-overlapping intermediate portion (11c) of the clamp band (11). The first tool receiving hole for band fastening (16) and the spare tool receiving hole for clamp band release (17) are respectively distributed in the openings,

An opening edge of the fixed claw receiving hole (15) adjacent to the nose (12) is cut and raised obliquely outward at a fixed angle (β) as a fastening claw (19) of the clamp band (11). Along with

The opening edge of the first tool receiving hole (16) on the side adjacent to the fixed claw receiving hole (15) is used as a first tool receiving claw (20), and the first edge of the spare tool receiving hole (17). Tool receiving hole (16)
With the opening edge on the side adjacent to the spare tool receiving claw (2
As 1), while cutting and raising obliquely outward at a certain angle (γ) (δ),

In the outer overlapped portion (11b), receiving holes (22), (22) of the fastening claws (19) are sequentially arranged from the other end of the cutout toward the direction in which the intermediate portion (11c) exists.
The second tool receiving hole (23) for fastening and releasing the clamp band and the slot (2) for receiving the nose (12).
4) Each of the apertures is distributed,

The fastening claw (19) is provided with an opening edge adjacent to the other end of the clamp band (11) in the fastening claw receiving hole (22) adjacent to the other end of the clamp band as a fixed claw (25).
And the opening edge of the second tool receiving hole (23) on the side adjacent to the fastening claw receiving hole (22) is used for clamping the clamp band. Second tool receiving claw for release (26)
And cut and raised obliquely outward at a certain angle (θ) facing the first tool receiving claw (20).

The drawing and drawing operation tool (P) engaged with both the first tool receiving claw (20) of the inner overlapping portion (11a) and the second tool receiving claw (26) of the outer overlapping portion (11b). By pulling and squeezing the action claw (32), the fixed claw (25) of the outer overlapped portion (11b) is engaged with the fastening claw (19) of the inner overlapped portion (11a) by biting and locking. While locking and fixing in the fastening state of (11),

The outer superposed portion (1) in the fastened state
The working claw (32) of the operating tool (P) engaged with both the second tool receiving claw (26) of 1b) and the spare tool receiving claw (21) of the inner overlapping portion (11a) is drawn and drawn. The operation is set so that the above-mentioned fastening state can be intentionally released, so that it can be mass-produced inexpensively as a reusable clamp, and the problem of the prior art described at the beginning is completely improved. You.

[Brief description of the drawings]

FIG. 1 is a plan view showing an expanded flat state of a clamp according to the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a perspective view of a product obtained by winding and bending a clamp fitting into a three-dimensional structure.

FIG. 4 is a perspective view of a state where the clamps of FIG. 3 are fastened.

FIG. 5 is a partially cutaway sectional view showing a state in which an object to be fixed is fastened and used by a clamp.

FIG. 6 is a partially enlarged plan view of FIG. 5;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;

FIG. 8 is a front view showing a drawing / drawing type operation tool.

FIG. 9 is a front view showing a process of drawing and drawing the clamp by the operating tool.

FIG. 10 is a front view showing a fastening state of the clamp fitting following FIG. 9;

FIG. 11 is a partially enlarged view of FIG. 10;

FIG. 12 is an enlarged sectional view taken along line 12-12 of FIG. 11;

FIG. 13 is a front view of the operation process of releasing the fastening state of the clamp.

FIG. 14 is a front view showing a released state of the clamp fitting following FIG. 13;

[Explanation of symbols]

 (10) ・ Fixed object (11) ・ Clamp band (11a) ・ Inner overlapping part (11b) ・ Outer overlapping part (11c) ・ Intermediate part (12) ・ Nose (15) ・ Fixed claw receiving hole (16) ・First tool receiving hole (17), spare tool receiving hole (19), fastening claw (20), first tool receiving claw (21), spare tool receiving claw (22), fastening claw receiving hole (23), second Tool receiving hole (24), nose receiving long hole (25), fixed claw (26), second tool receiving claw (31), various devices (32), operating tool working claw (M), metal strip material ( P) ・ Operation tool (L) ・ Constant length (T) ・ Constant thickness (X) ・ Overlap amount (W) (W1) ・ Constant width (β) (γ) (δ) (ε) (θ) ・Constant tilt angle

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16L 33/00 F16L 33/02-33/12 F16L 33/20 F16B 2/08

Claims (2)

(57) [Claims] 1. A clamp band (11) made of a metal strip material (M) cut to a predetermined length (L) is wound and bent at the other end similarly to an inner overlapped portion (11a) at one end of the wound band. By winding and bending into a circular ring shape in which the outer superposed portion (11b) on the side partially overlaps by a fixed amount (X), the diameter of the clamp band (11) is artificially forcibly contracted and deformed. , A fluid supply hose made of an elastic material such as rubber or synthetic resin, a dust-proof bellows, a boot for a shaft, and other fixed objects (10) to connection peripheral surfaces of various corresponding devices (31). In the clamp for fastening and fixing, a cut-off end of the inner overlapped portion (11a) is cut out as a nose (12) having a fixed width (W1) smaller than a fixed width (W) of the metal strip material (M). In the mating portion (11a), from the nose (12) to the direction in which the non-overlapping intermediate portion (11c) of the clamp band (11) is present, the fixing claw receiving hole (15) and the first clamp band fastening first are formed. The tool receiving hole (16) and the preliminary tool receiving hole (17) for releasing the clamp band are respectively distributed in the openings, and the nose (1) in the fixed claw receiving hole (15) is distributed.
2) Clamp band (1)
The fastening claw (1) of (1) is cut and raised obliquely outward at a certain angle (β), and the opening edge of the first tool receiving hole (16) on the side adjacent to the fixed claw receiving hole (15) is defined as a first. 1 As a tool receiving claw (20), and as the spare tool receiving hole (1)
The opening edge on the side adjacent to the first tool receiving hole (16) in (7) is used as a spare tool receiving claw (21), which is cut and raised obliquely outward at a certain angle (γ) (δ), respectively, while the outer overlapping portion is formed. In (11b), the receiving hole (22) of the above-mentioned fastening claw (19) and the second tool receiving for fastening and releasing the clamp band are sequentially arranged from the other end of the separation to the direction in which the intermediate portion (11c) exists. The holes (23) and the receiving long holes (24) of the nose (12) are respectively distributed in the openings, and the opening edges on the side adjacent to the other end of the clamp band (11) in the fastening claw receiving holes (22) are fixed. The nail (25) is cut and raised obliquely inward at a predetermined angle (ε) corresponding to the fastening nail (19).
The fastening claw receiving hole (2) in the tool receiving hole (23)
The opening edge on the side adjacent to 2) is used as a second tool receiving claw (26) for fastening and releasing the clamp band, and is obliquely outward at a constant angle (θ) facing the first tool receiving claw (20). Cut and raised, and the first tool receiving claw (2) of the inner overlapping portion (11a)
0) and the second drawing tool (P) engaged with both the second tool receiving claw (26) of the outer overlapped portion (11b).
The fixed claw (25) of the outer overlapped portion (11b) is engaged with the fastening claw (19) of the inner overlapped portion (11a) by pulling and squeezing the action claw (32).
The clamped band (11) is locked and fastened in the fastened state, and the second portion of the outer overlapping portion (11b) in the fastened state is locked.
The working claw (32) of the operating tool (P) engaged with both the tool receiving claw (26) and the spare tool receiving claw (21) of the inner overlap portion (11a) is drawn and drawn, A re-usable clamping fitting of a pull-drawing operation type, characterized in that the fastening state is determined so as to be able to be intentionally released. 2. The fastening claws (19) are cut obliquely outward from the inner overlapping portion (11a) of the clamp band (11) by a dimension substantially equal to the thickness (T) of the metal strip material (M). From the outer overlapping portion (11b) of the clamp band (11), the fixing claws (25) are cut obliquely inward by a dimension substantially equal to the thickness (T) of the metal strip material (M), and the fastening claws (19) are cut. ) And the fixed claw (25) are engaged with each other so that the clamp band (11) is fastened and locked on an overlapping plane of the inner overlapping portion (11a) and the outer overlapping portion (11b). 2. The re-usable clamp according to claim 1, wherein the clamp is operated by drawing.