JPS6023610A - Band joint device - 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] The present invention relates to pipes, pipes, valves, pumps,
The present invention relates to a band joint device suitable for use in connecting the main body of a pressure cooker, a stirrer, etc. and its lid, or any other cylindrical body.

Conventionally, the flange bolt tightening method and cransonondo method have been used to connect the cylinders, but these methods take time to attach and detach, and it is better to use a method that allows quick attachment and detachment. There are problems such as insufficient blood pressure required for crimping between the abutting end surfaces of the cylinders to be connected.

The present invention was developed in view of these problems, and its purpose is to enable quick and reliable attachment and detachment operations, to obtain sufficient surface pressure between the cylinders to be connected, and to facilitate mass production. An object of the present invention is to provide a band joint device that can be obtained at low cost.

In the knotted joint device according to the present invention, an annular bulge is formed on the outer surface of the cylinders along the abutting end surfaces of a pair of cylinders to be connected, each having an annular crimped butt end surface. The composite outer surface has a cross section that forms an arc having its center at the crimped butt end surface, and has an inner surface that is in close contact with the composite outer surface of the annular bulge and is almost entirely in contact with the annular bulge. A plurality of bondage band pieces are provided that touch the circumference and bind the bondage band, and at both ends of each bondage band piece there is a half-cone-shaped protrusion in the shape of a hollow truncated cone divided into two along a plane including the vertical axis. are fixedly installed, and the adjacent half-cone shaped protrusions are butted together to form a single hollow truncated cone, and the inner side of the butted adjacent half-cone shaped protrusions is Inserts a truncated cone integrally formed at the proximal end of the tightening port in a state of surface contact, and causes the tip of the tightening port to protrude from the truncated opening of the abutted half-conical protrusion, A tightening nut, which has a tightening part at its base that has a conical inner surface in surface contact with the outer surface of the adjacent half-conical protrusion, is screwed onto the tip of the tightening bolt and tightened, and the annular bulge is tightened with a tightening band piece. It is composed of

Hereinafter, the present invention will be described in detail with reference to the drawings. In FIG. 1, PI and P2 are l pairs of cylinders to be connected to each other. These are pipes, pipes and valves, pumps, pressure cookers, stirrers, and other machine bodies and their lids.13 In the illustrated example, the cylinders PI and P2 constitute the casing of the stirrer. It has a rotation axis λ of the sweeping blade inside. This rotating shaft is inserted into the bearings of the end plates 3 of one of the cylindrical bodies p and z.

The two cylindrical bodies P/; P, 2 are butted against each other at an abutting end surface j, and have annular bulges F/, F, 2'i on the outside along this abutting end surface j, respectively. Both annular bulges F
/, F2 form a synthetic outer surface 6 having an arcuate cross section in the abutted state. The arc of the composite outer surface B is a circular arc with a radius R/ centered at a point 0 on the butt end surface B. Both cylindrical bodies P/ and P have a monkey-shaped concave ('1q) facing the abutting end surfaces, and
Tsukin l is fitted.

A tightening band piece is provided almost all around the outer surface t of the annular bulge F/, F, 2.

As shown in FIG. 2, a plurality of tightening band pieces (three pieces in the illustrated case) are provided, and the inner surface 10 of the valley tightening pan dot is in close contact with the composite outer surface B of the annular bulges F/ and Fλ. Point 0
It has a cross-sectional shape formed by a circular arc with a radius of .

At both ends of each tightening piece 972, there is a half-cone shaped protrusion which is a hollow truncated cone divided into two by a plane including the vertical axis.
2, /J is fixed by welding or the like.

Adjacent half-cone shaped protrusions /2, /2 are as shown in Fig. 3 and Fig. 3 (showing a state in which both protrusions /, 2, /LZ are closer to each other than in Fig. 3). When the two are butted together, a single hollow truncated cone is formed, and by cutting the top of the cone, an opening 1 is formed.
As shown in FIG.
Inside the hollow cone formed by abutting 2, there is a truncated cone/A integrally formed at the base end of the tightening pole)/S.
is inserted. A truncated circle 6:1 (a concave groove 17 is formed on the bottom surface of the body/6 as shown in the figure).

This concave groove/7OUr surface shape is made up of a radius R, 2 (which constitutes the cross-sectional shape of the outer surface of the tightening piece 221), and is tenth of the circular arc that is equal to the circular arc in the figure. 7
The face is tight and non-extroverted! It has a shape that allows it to come into contact with the body. The tip of the tightening bolt 15 protrudes from the opening /3 of the half-conical projection 12, and a tightening nut /14 is engaged with the protruding end. The tightening nut I is mounted within the tightening part J, Of, which has a conical inner surface /9, as is clear from FIGS. 5 and 6. Conical inner surface/9
has a shape that is in close contact with the outer surface of the circle fjJD body formed by combining the adjacent half-cone shaped protrusions 12.

The joint device described above is in the state shown in FIG. 5 before being tightened. In this state, the pieces of the tightening band are attached to the annular bulges F/, ? of the cylinder to be connected. 2 without exerting a tightening action on both annular bulges F/.

F2 are separable from each other.

When a tightening piece is applied to the outer surface t of the two segment-shaped bulges F/, F, and 2 and the tightening nut/g is tightened, the inner surface 19 of the tightening portion U0 is attached to the adjacent half-cone-shaped protrusion. 12, and the state shown in FIG. 7 is obtained. In this state, the conical surface of the truncated cone/6 of the tightening bolt 15 is pressed against the inner surface /q, and the half cone-like protrusion 12 is between the inner surface of the tightening part 20 and the outer surface of the truncated cone/6. Therefore, the adjacent half-cone shaped protrusions /2 are drawn together,
The tightening band piece, which had a gap N as shown in Fig. 3 before tightening, is shaped into an annular bulge F/ so that it has a gap N' (for example, about jX1711) as shown in Fig.
, tightened against F2.

In this tightening state, the tightening force of one piece of the tightening band is applied evenly to the entire circumference of both the segment-shaped bulges F/, F, 2 due to the force acting in the radial direction by the tightening pole 15, and the tightening force is Since the inner surface of the band piece and the outer surface of both annular bulges have an arcuate cross-sectional shape, not only the binding force toward the inside of the cylindrical body P/, P but also the annular bulges F/, F ,2
A binding force is also applied in the direction of abutting them against each other and crimping them at the end surfaces j. Therefore, rotate as shown! , 2, the bearings also maintain accurate right angles to the rotating shaft, and the stirring blades supported by the rotation Q111 also take the correct position.

On the other hand, the concave groove/7 at the bottom of the truncated cone/6 of the tightening port 15
In the case where the groove 7 is in close contact with the outer surface of the tightening band piece having an arcuate cross section, it is impossible to turn the tightening band 15, and therefore the nut/
It never slackens. In this way, the concave groove 17 of the truncated cone/l closely contacts the joint portion of the adjacent tightening band piece and presses it radially inward, thereby causing the adjacent tightening band piece to radially close to the end of the band. Direction outward - ＼Compared to the conventional case where flanges are provided that extend out and the tightening that passes through these flanges is done by bolts, and force is applied when tightening the bolts, the tightening band can be tightened uniformly around the entire circumference. A good surface pressure can be obtained.

To release this joint device, simply loosen the nut. As a result, the state shown in FIG. 5 is obtained, and the tightening and tightening pieces can be removed from the monkey-shaped bulges F/ and F without completely removing the nuts/flanges.

As described above, the knotted joint device of the present invention is different in principle and construction from the conventional cranzono bolt type coupling device, and requires only 2 times the amount of materials compared to the conventional flange bolt tightening type coupling device. It is simple and inexpensive to construct, yet provides sufficient binding and sealing effects, and is quick and easy to attach and detach. In addition, the tightening force acts on the tightening band piece through radial force by the tightening port, so uniform surface pressure acts on the entire surface of the tightening node.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the main safety part of the joint device j7 of the present invention, and FIG. 2 is a plan view mainly showing the tightening and band pieces.
Fig. 3 is a top view of the tightening band piece, Fig. 3 is a side view showing the state in which the half-cone shaped protrusion of the tightening band piece is approached, and Fig. 5 is the state of the tightening port and the tightening nut before tightening. FIG. 7 is a perspective view of the tightening port and the tightening nut, and FIG. 7 is a sectional view showing the tightening port and the tightening nut in a tightened state. PI, F2...Cylinder to be connected, F/, F, 2...
Annular bulge,! ...Abutting end surface, t-...Synthetic outer surface of the annular bulge, Ri...Tightening band piece, 12...Half-split conical projection, /3...Opening, /j... Tightening port, /6...Truncated cone, 17...Concave groove, lza・
...Tightening nut, /q...Conical inner surface,...Tightening part. Applicant's agent Kiyoshi Inomata Figure 3 Figure 4 Figure 5 Figure 42-

Claims (1)

[Scope of Claims] A ring-shaped bulge is formed on the outer surface of the cylinders along the butt-end faces of a pair of cylinders having t/J annular crimped butt end faces, and the annular bulges of both cylinders are combined. The outer surface has a cross section that forms an arc having its center at the crimped butt end surface, and has an inner surface that is shaped to closely contact the synthetic outer surface of the annular bulge and is approximately the entire circumference of the annular bulge. A plurality of bondage band pieces are provided to touch and bind the bondage band pieces, and at both ends of each bondage band piece, a half-cone-shaped protrusion is provided in the shape of a hollow truncated cone divided into two along a plane including the vertical axis. The adjacent half-cone shaped protrusions are formed into a single hollow truncated cone by abutting against each other, and the inner sides of the butted adjacent half-cone shaped protrusions are A truncated cone integrally formed at the base end of the tightening bolt is inserted in surface contact, and the tip of the tightening port is protruded from the truncated opening of the abutted half-conical protrusion, and the adjacent A tightening nut whose base has a tightening part having a conical inner surface in surface contact with the outer surface of the half-conical protrusion is screwed onto the tip of the tightening port and tightened. Band joint device for bondage. (2) A concave groove with an arc-shaped cross section is formed on the bottom surface of the truncated cone of the tightening bolt, and is in close contact with the outer surface of the tightening joint piece, which has an arc-shaped cross-section. A joint device according to claim 1.