JPS6222039B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal coupling band used mainly for tightening large products such as tightening hoses and dustproof covers of universal joints.

Figures 1 and 2 were created by the applicant in the 1970s.
This figure shows this type of metal coupling band already proposed as No. 14702. In the figure, 1 is a metal band member, such as a steel band, 2 is a lever made of a steel plate thicker than this steel band, 3 is a stopper, which is
The whole is bent into a U-shape, and the metal strip member 1 is
The ear plates on both sides are fitted into a part of the band-shaped member 1 at an appropriate position so as to protrude outward from the inside of the band-shaped member 1, and are fixed together by a suitable method such as spot welding. The metal band member 1 is made of a narrow and thin steel band plate, which is bent into a ring shape so that both ends 1' and 1'' of the metal band member 1 touch the palms, and a lever 2 is slightly attached to the outside of one of the palms. These 1', 1'', and 2 are fixed together by overlapping, spot welding, riveting, or other suitable methods. Then, the palm part is bent and tightened by the lever action of the lever 2, and after tightening, the vicinity of the outer end 2' of the lever 2 is fixed to the metal band-shaped member 1 with a fastener 3, and thereby tightened. It is configured to maintain the attached state.

However, since this is an endless ring,
When tightening a hose, etc., it is not possible to attach a metal binding band directly to the specified tightening point of the hose, etc., so it is necessary to fit it from one end of the hose, etc.
Extra operations were required to move this to the tightening point and then tighten it, which made the tightening work that much more time-consuming and poor workability.

In view of the above points, the present invention maintains the advantages of a simple structure, easy handling, and no exposed protrusions or obstructions on the outer periphery, while also being able to use arbitrary fasteners such as dust-proof covers of hoses or universal joints. It is an object of the present invention to provide a metal coupling band that can be attached directly to the attachment point and that can improve workability.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to embodiments shown in the drawings.

In FIGS. 3 to 6, reference numeral 11 denotes a metal band member, for example a steel band, 12 an arc-shaped lever made of plate steel that is thicker than the steel band, and 13 holds the metal band member 11 in a tightened state. This is a fastener for fastening the lever 12 to the band-shaped member 11. The band member 11 is made of a narrow and thin steel band, which is curved into a ring shape, and the convex side of the lever 12 is spot-welded, riveted, or other suitable material is attached to one end 11a bent outward into a U-shape. The lever 12 is attached to the other end 11b.
A protrusion 14 formed by cutting and raising a part of the inner end side of the
A through hole 15 is formed into which the screw is inserted and locked. Protrusion 14
is located between the end of the lever closer to the other end 11b of the strip member and the fixed portion between the lever 12 and the strip member 11, and faces toward the fixed portion. Further, the stopper 13 has a U-shape as a whole, and the belt-shaped member 11
Both side ear plates 13a, 13a are fitted into appropriate positions from the inside of the band member 11 so as to protrude outward, and are fixed together by a suitable method such as spot welding.

Therefore, when tightening, the belt-shaped member 11
Expand it a little and attach it to the tightening point of the hose, etc. Since both ends 11a and 11b are separated, it can be immediately applied to a desired position in the longitudinal direction of a hose, etc. (two-dot chain line in FIG. 7A). Then, as shown in FIG.
After fitting and locking into the through hole 15, the lever 12 is pushed down and rotated in the direction of the arrow shown in the figure. Then,
The inner edge surface 12a of the lever 12 comes into pressure contact with a predetermined portion P of the outer peripheral surface 11c of the band-shaped member 11, and from now on, this point P
The lever 12 rotates using the fulcrum as a fulcrum (Fig. 7B). As the lever 12 rotates, the fixed point Q between the one end 11a of the strip member 11 and the lever 12 is pulled toward the other end 11b of the strip member, and at the same time, the other end 11b is bent about the point P as a fulcrum.
As shown in FIGS. 5 and 6, both ends 11a and 11b are brought into close contact with each other along the outer peripheral surface 11c of the band-shaped member 11. As a result, the diameter of the ring of the band member 11 is reduced, and the object to be fastened, such as a hose, is tightened (solid line in FIG. 7A). That is, the lever 12 performs a lever action using the outer end 12b as the point of force, P as the fulcrum, and Q as the point of action.The longer the distance between P and Q, the greater the diameter reduction ratio and tightening force. The longer the distance from Q to the outer end 12b of the lever 12, the smaller the operating force will be. When the belt-like member 11 is tightened by the lever 12 in this manner, the outer end 12b of the lever 12
By bending the ear plates 13a, 13a inwardly, the outer end 1 of the lever
The portion 2b is held and fixed in close contact with the band-like member 11.

The length of the lever 12 may be appropriately set depending on the conditions of use, and it is preferable that the lever 12 be curved in an arc shape along the annular outer circumferential surface 11c of the band member 11 as shown in the drawing. Further, the stopper 13 is not limited to the above-mentioned one, and the lever 1
2 can be fixed along the strip member 11. Furthermore, the inner diameter of the metal coupling band of the present invention when tightened is made to be slightly smaller than the outer diameter of the object to be fastened at the tightening location. Further, in the above embodiment, a steel band is used as an example of the metal band member 11, but it goes without saying that the metal band member 11 may be made of other metal materials.

As explained above, the present invention consists of a metal band-shaped member curved into a ring shape, and an arc-shaped lever whose convex side is fixed to one end of the band-shaped member, the band-shaped member has a through hole near the other end, and the lever has a protrusion that is cut up on the convex side and faces the fixed part between the end of the lever that is closer to the other end of the strip member and the fixed part with the strip member, and the protrusion of the lever is shaped like a strip. With the lever inserted and locked into the through-hole of the member, the end of the lever in contact with the band-shaped member is used as a fulcrum and the lever is pushed down to the concave side, thereby reducing the diameter of the band-shaped member and tightening it around the object to be fastened. Since the outer end portion of the lever that overlaps the outer periphery of the member is fixed to the band-shaped member with a fastener, the following significant effects are achieved. That is, both ends of the band-like member are joined by fitting and locking the protrusions into the through-holes, and then the locking overlapping portion is approximately reversed and folded back, and as a result, the locking portion is covered with the band-like member. Even when tightening a high-speed rotating object such as the dustproof cover of a universal joint, it will not come off accidentally, and can guarantee stable and reliable tightening over a long period of time, which is the essential function of this type of coupling band. At the same time, the coupling band is thin over the entire circumference, fits snugly around the object to be fastened, and no protrusions or obstructions are exposed on the outer periphery, so it is particularly useful for fastening rotating objects such as the dustproof cover of a universal joint. This is extremely advantageous in terms of safety. Furthermore, when installing, simply hook the protrusion into the through hole, and the restoring force of the band-shaped member will elastically maintain the locked state, and then push down the lever and secure the end with the stopper. Tightening is completed just by putting it on, making it easier to handle and greatly improving work efficiency. Moreover, since the strip member is separated and opened between both ends, it can be attached directly to the tightening point without having to insert it through the end of the hose, universal joint dust cover, etc. as in the past. Installation is simple and easy, which also greatly contributes to improving work efficiency. Furthermore, since the structure is simple and the number of parts is small, the manufacturing cost is low, and since the parts are joined by ordinary fastening means such as spot welding and rivets, it is well suited for mass production.

[Brief explanation of the drawing]

1 and 2 are front views showing a conventional metal coupling band, with FIG. 1 showing the band before it is tightened, and FIG. 2 after it is tightened. 3 to 6 show a metal coupling band according to the present invention, FIG. 3 is a perspective view thereof, FIG. 4 is a front view thereof, FIG. The figure is a sectional view of the main part, Figure 7A,
B is a sectional view showing the state before and after tightening. 11...Metal band member, 12...Lever, 1
3... Fastener, 14... Protrusion, 15... Through hole.

Claims (1)

[Claims] 1 Consists of a circularly curved metal band member and an arcuate lever with the convex side fixed to one end of the band member, the band member has a through hole near the other end, and the lever is located near the other end of the band member. Between the end of the other lever and the fixed part of the band-like member, there is a protrusion that is cut up on the convex side and faces the fixed part, and the protrusion of the lever is inserted into the through-hole of the band-like member and locked. In this state, by pushing down the lever toward the concave side using the end of the lever in contact with the strip member as a fulcrum, the diameter of the strip member is reduced and tightened around the object to be fastened, and the lever overlapped with the outer periphery of the strip member is A metal coupling band characterized in that its outer end portion is fixed to a band-shaped member with a fastener.