JPH0842772A - Coupling structure - Google Patents

Abstract

PURPOSE:To provide a coupling which is capable of stopping the turning movement of fastening levers at an optional turning position, and improving the workability of an attaching and detaching work of an adaptor and a coupler. CONSTITUTION:In a coupling structure consisting of an adaptor fitted to one end of one pipe, a coupler 4 which is fitted to one end of the other pipe and in which the adaptor is pushed, and fastening levers 6 which are turnably pivoted on the coupler 4 through pivot shafts 5 and which have a cam part capable of being fitted in a recessed part of the adaptor inserted into the coupler 4, lever stopping tools 11 having tubular parts 14 for elastically restraining the turning movement of the fastening levers 6 are fitted to the pivot shafts 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupling structure for connecting and disconnecting pipes with one touch.

[0002]

2. Description of the Related Art A conventional coupling structure is shown in FIG.
And it demonstrates based on FIG. As shown in FIG. 8, a cylindrical adapter 2 is attached to one end of one pipe 1 by a method such as screwing or fitting, and another adapter is attached to one end of the other pipe 3 in the same manner, and the adapter 2 It is composed of a tubular coupler 4 into which is inserted.

The coupler 4 is provided with at least two fastening levers 6 which are pivotally mounted by a pivot shaft 5 so as to be rotatable. Each of the fastening levers 6 has a cam portion 7, and the cam portions 6 are operated by rotating the fastening lever 6 around the pivot shaft 5. Then, when the adapter 2 is inserted into the coupler 4 and fitted into the concave portion 8 on the peripheral surface of the adapter 2, the cam portion 7 has the adapter seal portion 9 of the adapter 2 which seals the packing 1 inside the coupler 4.
0 is compressed, and the adapter 2 and the coupler 4 are connected in a hermetically sealed state. In this state, as shown in FIG. 9, the fastening lever 6 is pivoted downward about the pivot 5 as a fulcrum, and its free end is brought close to the side wall of the coupler 4. Reference numeral 10a is a pulling ring provided on the free end of the fastening lever 6.

[0004]

However, in the coupling structure described above, the fastening lever 6 is rotatably supported on the pivot shaft 5 of the coupler 4. Therefore, when the pipe is piped in the vertical direction, the adapter 2 is in the upper position and the coupler 4 is in the lower position, and the axial center thereof is in the vertical direction. Therefore, the fastening lever 6 pivotally supported by the pivot shaft 5 pivots in the closing direction by its own weight. That is, the cam portion 7 of the fastening lever 6 projects from the inner peripheral wall of the coupler 4.

Therefore, when the coupler 4 is fitted into the adapter 2, the cam portion 7 of the fastening lever 6 comes into contact with the adapter seal portion 9 of the adapter 2 so that the coupler 4 cannot be fitted into the adapter 2. Then, the operator manually rotates the fastening lever 6 upward so that the cam portion 7 moves the coupler 4.
Adapter 2 while immersing it from the inner peripheral wall of
It is difficult to perform the work, and it is extremely difficult work especially in a high position or in a narrow place.

Further, when the pipe is piped in the horizontal direction, the fastening lever 6 located on the lower side of the coupler 4 rotates in the opening direction by its own weight, but the fastening lever 6 located on the upper side is closed by its own weight. Will rotate in the direction. That is, the cam portion 7 of one of the fastening levers 6 is in a state of protruding from the inner peripheral wall of the coupler 4, which has the same problem as described above and the workability is poor.

Further, in a state where the adapter 2 and the coupler 4 are connected, when the adapter 2 is lower and the coupler 4 is higher (opposite to FIG. 9), the load compressing the packing 10 is the adapter 2 and the coupler 4. 4, a gap is formed between the cam portion 7 of the fastening lever 6 and the concave portion 8 of the adapter 2, and even if the gap is instantaneous, the fastening lever 6 rotates in the opening direction by its own weight. Therefore, the connection between the adapter 2 and the coupler 4 is released, which may lead to an accident.

The present invention has been made in view of the above circumstances, and an object thereof is to stop the rotation of the fastening lever at an arbitrary rotation position, and to attach and detach the adapter and the coupler. An object of the present invention is to provide a coupling structure capable of improving workability and preventing the connection between the adapter and the coupler from being accidentally released, and improving reliability.

[0009]

In order to achieve the above object, the present invention provides an adapter attached to one end of one pipe, a coupler attached to one end of the other pipe and into which the adapter is inserted. A coupling comprising at least one fastening lever rotatably pivotally attached to the coupler via a pivot shaft and having a cam portion capable of fitting in the recess of the adapter inserted into the coupler. In the structure, a lever stopper for elastically restraining the rotation of the fastening lever is attached to the pivot shaft.

Preferably, the lever stopper is made of a plate-like body, and one end of the lever stopper has a fitting hole for fitting with the pivot shaft, and the other end of the lever stopper is in contact with the vicinity of the pivot lever of the fastening lever. It is characterized in that a tubular portion is provided in contact therewith. Further, preferably, the lever stopper is attachable to and detachable from the pivot shaft in a direction perpendicular to the axial direction thereof.

[0011]

According to the coupling structure of the above construction, the vicinity of the pivotal support portion of the fastening lever is elastically pressed by the lever stopper, and the rotation is elastically restrained. Therefore, the fastening lever can be stopped at any position regardless of the orientation of the coupler.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. However, the same components as those of the prior art will be designated by the same reference numerals and the description thereof will be omitted. 1 to 4 show an embodiment, and FIG. 1 shows a coupler 4 which constitutes a coupling and a lever stopper 1
It is a perspective view in the state where 1 was attached. Lever stop 11
As shown in FIG. 2, a substantially fan-shaped mounting plate 12a is formed at a base end portion of a stopper body 12 made of a plate-shaped body such as a steel plate, and a pivot shaft 5 of a coupler 4 is fitted in a central portion thereof. A fitting hole 13 for mating is formed.

A strip-shaped protruding piece 12b is integrally provided on the arc portion of the mounting plate 12a of the stopper body 12, and the protruding portion 12b is provided with a tubular portion 14 which is curved in a cylindrical shape. . Further, a tongue piece 15 is formed at the tip of the projecting piece 12b so as to be continuous with the tubular portion 14, and a gap g is formed between the tongue piece 15 and the plate surface of the mounting plate 12a. The tubular portion 14 is elastically deformed within the range of g.

When the lever stopper 11 having the above-mentioned structure is attached to the coupling, first of all, the projection 1 which is provided integrally with the coupler 4 and axially supports both ends of the pivot shaft 5.
The pivot shaft 5 is pulled out from the stopper 6, and the stopper body 12 is provided between the vicinity of the pivot portion 6a on one surface of the fastening lever 6 and the protrusion 16.
The mounting plate 12a is interposed. Then, the pivot shaft 5 is inserted into the fitting hole 13 of the mounting plate 12a, and the pivot shaft 5 is further inserted into the fastening lever 6, whereby the fastening lever 6 and the lever stopper 11 are attached to the pivot shaft 5. Mounted.

When the lever stopper 11 is attached to the coupler 4 in this way, as shown in FIGS. 3 and 4,
The mounting plate 12a and the tongue piece 15 are interposed between one surface of the fastening lever 6 and the protruding portion 16, and when the fastening lever 6 is closed (in a tilted state), as shown in FIG.
Protrudes outward from the fastening lever 6 and restrains the fastening lever 6 in a closed state. Further, when the fastening lever 6 is opened (raised state), as shown in FIG. 4, the tubular portion 14 elastically presses against one surface of the fastening lever 6 near the pivotally supporting portion 6a and restrains the open state. .

Since the tubular portion 14 of the lever stopper 11 has the gap g, it can be elastically deformed in the radial direction.
By rotating the fastening lever 6 against the elastic force of the tubular portion 14, the fastening lever 6 can be rotated.
Unless an external force is applied to the fastening lever 6, the fastening lever 6 does not rotate under its own weight or the like.

Therefore, when the pipe is piped in the vertical direction by the coupling, the adapter 2 is in the upper position and the coupler 4 is in the lower position, so that the pivot shaft 5 can rotate freely even if its axis is in the vertical direction. Since the fastening lever 6 pivotally supported is elastically restrained by the lever stopper 11, it does not rotate in the closing direction by its own weight.

For this reason, when the coupler 4 is fitted to the adapter 2, the operator does not press the fastening lever 6 by hand, after fitting the coupler 4 to the adapter 2, the fastening lever 6 is rotated in the closing direction. By moving, the cam portion 7 can be engaged with the concave portion 8. Therefore, it is possible to easily attach / detach the adapter 2 and the coupler 4 even in a high place or in a narrow place.

Also, when the pipe is piped horizontally, the fastening lever 6 located on the upper side of the coupler 4 does not rotate in the closing direction by its own weight, and the lever stopper 1
The fastening lever 6 can be restrained in the open state by the means 1, and the work of attaching and detaching the adapter 2 and the coupler 4 can be easily performed.

The lever stopper is not limited to the one embodiment described above, but may be constructed as follows. That is, the lever stopper shown in FIG.
A cutout hole 16 is provided in 2a, and a fixing plate 17 that is detachable from the mounting plate 12a is provided. The fixed plate 17 is provided with a cutout portion 17a facing the cutout hole 16, and projecting pieces 18 are provided at both end portions.

According to this structure, when the lever stopper is mounted on the pivot shaft 5 of the coupler 4, the mounting plate 12a is inserted into the pivot shaft 5 from above to form a notch hole 16 in the pivot shaft 5.
Is fitted, the fixing plate 17 is inserted from below, and the notch 17a is fitted to the pivot shaft 5. In this state, the tip end of the protruding piece 18 is bent and fixed to both shoulders 19 of the mounting plate 12a by caulking, so that the pivot shaft 5 can be mounted without pulling out from the coupler 4. .

The lever stopper shown in FIG. 6 has a mounting plate 12
A fitting hole 21 having a cutout opening 20 is provided in a, and a tapered portion 20a is formed in the cutout opening 20. According to this structure, when the lever stopper is attached to the pivot shaft 5 of the coupler 4, the notch opening 20 is positioned with respect to the pivot shaft 5 and pushed downward, so that the tapered portion 20a serves as a guide. The notch opening 20 is expanded by 5 and fitted into the fitting hole 21. Therefore, the pivot shaft 5 can be attached without removing it from the coupler 4.

The lever stopper shown in FIG. 7 has a triangular tubular portion 22 in place of the tubular portion 14 of the embodiment, and the same effect as that of the embodiment can be obtained. Further, the structure of the lever stopper is not limited to the above-described embodiment, but may be any structure as long as it can be attached to the pivot shaft 5 and elastically restrain the rotation of the fastening lever 6. Therefore, the material of the lever stopper is not limited to metal and may be a molded product of synthetic resin material.

[0024]

As described above, according to the present invention, by attaching the lever stopper for elastically restraining the rotation of the fastening lever to the pivot shaft of the coupling, the fastening lever can be rotated at any time. The rotation can be stopped at the moving position, and the workability of attaching and detaching the adapter and the coupler can be improved. Moreover, even if an external force is applied to the adapter and the coupler in the axial direction, the fastening lever is restrained, so that the connection is not accidentally released, and the reliability can be improved. .

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a coupling structure according to an embodiment of the present invention.

FIG. 2 is a perspective view, a side view, and a front view of the lever stopper according to the embodiment.

FIG. 3 is a plan view showing a state in which a lever stopper is attached to the coupling of the embodiment and the fastening lever is tilted.

FIG. 4 is a plan view showing a state in which a lever stopper is attached to the coupling of the embodiment and a fastening lever is raised.

FIG. 5 is a front view of a lever stopper according to another embodiment of the present invention.

FIG. 6 is a front view of a lever stopper according to another embodiment of the present invention.

FIG. 7 is a perspective view of a lever stopper according to another embodiment of the present invention.

FIG. 8 is a partially cutaway side view showing a conventional coupling, in which an adapter and a coupler are separated from each other.

FIG. 9 is a partially cutaway side view showing a conventional coupling, in which an adapter and a coupler are connected to each other.

[Explanation of symbols]

1 ... One tube, 2 ... Adapter, 3 ... Other tube, 4 ... Coupler, 5 ... Pivot shaft, 6 ... Fastening lever, 7 ... Cam part, 8
... recess, 11 ... lever stop.

Claims (3)

[Claims] 1. An adapter attached to one end of one pipe, a coupler attached to one end of the other pipe and into which the adapter is inserted, and pivotally attached to the coupler via a pivot shaft. And a coupling structure including at least one fastening lever having a cam portion that can be fitted into the recess of the adapter inserted into the coupler, wherein the pivot shaft supports the rotation of the fastening lever elastically. Coupling structure characterized by the attachment of a lever stop that constrains it mechanically. 2. The lever stopper comprises a plate-shaped body,
A fitting hole for fitting the pivot shaft is provided at one end thereof,
2. The coupling structure according to claim 1, wherein the other end is provided with a tubular portion that comes into contact with the vicinity of the pivotal support portion of the fastening lever. 3. The coupling structure according to claim 1, wherein the lever stopper is attachable / detachable to / from the pivot shaft in a direction perpendicular to an axial direction thereof.