JP2009115167A - Clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp for visually confirming whether or not a gasket is uniformly fastened on the circumference by the actual thing, when fastening a sanitary pipe and an adjacent sanitary pipe by the clamp by interposing the gasket between ferrules. <P>SOLUTION: A clamp union joint for the sanitary pipe is assembled by being fastened by the clamp 1 by sandwiching the gasket 6 by the ferrules 2F and 3F. Observation ports 11H, 12H and 13H are respectively arranged on the circular arc part outer periphery of circular arcuate clamp bands 11, 12 and 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a clamp union joint used as a joint for sanitary piping such as beverages.

  Conventionally, various clamps have been proposed as clamps for piping joints that are less likely to cause mistakes in the clamping operation. (See Patent Documents 1 and 2)

  In Patent Document 1, there is a plurality of pressing rings (6) (indicated by symbols in the drawing of Patent Document 1 and indicated in parentheses in this paragraph) along the peripheral wall of the pressing ring (6) at the end thereof. Of the inner core when the plastic tube (9) is slid to a predetermined position along the outer peripheral surface of the inner core portion (3). The plastic pipe (9) that is forcibly enlarged by the outer peripheral surface of the part (3) is held, and at the time when the connection work is completed, it is made to function as a hole for visual observation of whether or not complete construction has been completed.

Further, in Patent Document 2, a through hole (15) is provided in a joint body 1 (indicated by a symbol in the drawing of Patent Document 2 and indicated in parentheses in this paragraph), and a connecting pipe (5). It is supposed that whether or not the insertion has been performed reliably is confirmed by the protrusion of the check pin (4) attached to the through hole (15).
Japanese Patent No. 3650209 (FIGS. 1 and 2) Japanese Utility Model Publication No. 5-42877 (FIGS. 1 and 2)

  In Patent Document 1, when such a peep hole is used to attach a plastic tube with a tool, the inside of the peep hole is not looked at, but simply a look at the mounted state after mounting, and whether or not complete construction has been completed. It is not a reliable method for confirming. In the configuration as disclosed in Patent Document 2, an extra part called a check pin is required, which increases the cost and takes time and effort to attach the check pin. Furthermore, the check with the check pin protruding is a very uncertain method of “maybe it will be fine”.

  The present invention has been proposed in view of such circumstances, and in a sanitary piping clamp union joint that is assembled by clamping a gasket with a ferrule and tightening with a clamp, the sanitary piping and the adjacent sanitary piping have a gasket between the ferrules. To provide a clamp that visually confirms whether the gasket is tightened evenly on the circumference and whether the gasket is tightened more than necessary when intervening and tightening with a clamp. With the goal.

With respect to the above problems, the present invention aims to solve the problems by the following means.
(1) The clamp of the first means is a clamp union joint for sanitary piping that is assembled by clamping a gasket with a ferrule and tightening with the clamp. The sanitary piping and the adjacent sanitary piping are clamped with a gasket between the ferrules interposed. When tightened, visually check that the gasket is securely fitted in the groove of the ferrule, and that the gasket is tightened evenly on the circumference, and that the gasket is not tightened excessively. In order to make it possible, a peep hole is provided at one or a plurality of locations on the outer periphery of the arc portion of the arc-shaped clamp band.

(2) The clamp of the second means is characterized in that, in the clamp of the first means, the clamp band is divided into two or more.

  The present invention according to the claims is a clamp union joint clamp of the above-mentioned means, and has a peephole provided at one or a plurality of locations on the outer periphery of the arc portion of the arc-shaped clamp band. When clamping the ferrule of the adjacent sanitary piping with a clamp, check that the gasket is securely fitted in the ferrule groove and that the gasket is tightened evenly on the circumference. Therefore, it is possible to perform the tightening work while visually confirming whether or not the tightening has been performed excessively. Therefore, there is an effect that the work can be performed efficiently and appropriately.

Hereinafter, the clamp of the present invention will be described in detail with reference to the drawings.
1 to 3 show an embodiment of a clamp union joint according to the present invention. This embodiment is applied to a sanitary pipe for beverages in a food factory.

(First embodiment)
FIG. 1 is a partial sectional view of a clamp union joint for sanitary piping. FIG. 2 shows the ferrule joint, gasket and clamp of the sanitary pipe in a perspective view.

  As shown in the figure, the sanitary pipe 2 and the sanitary pipe 3 are configured such that the ferrule 2F and the ferrule 3F of the joint portion are tightened by the clamp 1 via the gasket 6.

  As shown in FIG. 2, the clamp 1 is configured such that the clamp bands 11, 12, and 13 can rotate via pins 14 and 12 and 13 via pins 15. The clamp band 11 has a clamping part 16 on the side opposite to the pin 14, and the clamp band 13 has a shaft support part 17 on the side opposite to the pin 15, and a shaft body 19 having a screw part at the tip is attached to the shaft support part 17. The pin 18 is turned around a fulcrum and engaged with the clamping part 16 by a tightening nut 20 so as to be clamped as a clamp.

  The gasket 6 is sandwiched between the joints of the ferrule 2F and the ferrule 3F, and the arc-shaped protrusions of the gasket 6 are fitted into the arc-shaped grooves 22 and 32 of the ferrule 2F and the ferrule 3F, so that the ferrule 2F and the ferrule 3F are tightened. The inclined portions 21 and 31 are fastened by the corresponding inclined portions of the clamp bands 11, 12, and 13.

  The clamp bands 11, 12 and 13 are provided with peep holes 11H, 12H and 13H, respectively, on the outer circumference of the arc portion. Although an example in which one peep hole is provided in each of the clamp bands 11, 12, and 13 has been shown, two or more peep holes may be provided, and the number of peep holes suitable for the purpose of use may be set.

(Second Embodiment)
The clamp 110 in FIG. 3 is a second embodiment, and includes clamp bands 111 and 112. The clamp portions 111R and 112R are formed at both ends, respectively. By tightening the clamp portions with fastening bolts 118 and nuts 119, It is designed to be clamped as a clamp.

The clamp bands 111 and 112 in FIG. 3 are provided with peep holes 111H and 112H, respectively, on the outer circumference of the arc portion. The example in which one peep hole is provided in each of the clamp bands 111 and 112 is shown, but two or more peep holes may be provided in each. Further, the peep holes may be provided only in the clamp band 111 and not provided in the clamp band 112, and the number of peep holes suitable for the purpose of use may be set.
The clamp union joint for sanitary piping having the above-described configuration is used as follows. First, the first embodiment shown in FIGS. 1 and 2 will be described.

  The clamp union fitting is fitted so that the gasket 6 is fitted inside the ferrules 2F and 3F of the sanitary pipes 2 and 3 so that the arc-shaped protrusions fit the corresponding arc-shaped grooves 22 and 32 of the ferrules 2F and 3F. In addition, the clamp bands 11, 12, and 13 are fitted to the arcuate outer peripheral portions of the ferrule 2 </ b> F and the ferrule 3 </ b> F, and tightened with the tightening nut 20 so that the shaft body 19 engages with the holding portion 16.

  At this time, it is confirmed that the gasket 6 is securely fitted into the arc-shaped grooves 22 and 32 while looking through the peep holes 11H, 12H, and 13H, and that the gasket 6 is evenly tightened on the circumference. While checking, tighten the work while confirming that it is not overtightened.

  Similarly, in the second embodiment shown in FIG. 3, the gasket 6 is securely fitted in the groove while looking through the viewing holes 111H and 112H of the clamp bands 111 and 112. It is tightened with the fastening bolt 118 and the nut 119 while confirming that it is tightened evenly on the circumference and also confirming that it is not overtightened.

  As described above in detail based on each embodiment, the clamp union joint of the present invention is operated while looking at the tightening condition of the gasket from the viewing hole of the clamp band when the gasket is sandwiched with the ferrule and tightened with the clamp. 1 can prevent leakage of beverages due to improper fitting between the gasket and the ferrule, and the gasket is excessively tightened and protrudes from part D shown in FIG. There is an effect that it is possible to prevent the problem of becoming a foreign material.

It is a partial sectional view of a clamp union joint of sanitary piping concerning a 1st embodiment of the present invention. It is a perspective view of the ferrule joint, gasket, and clamp of the sanitary piping concerning the present invention. It is a perspective view of the clamp union joint of sanitary piping concerning a 2nd embodiment of the present invention.

Explanation of symbols

1,110 ... Clamp,
2F, 3F ... Ferrule,
6 ... gasket,
11, 12, 13, 11, 112 ... clamp band,
11H, 12H, 13H, 111H, 112H ... Peephole

Claims (2)

  A clamp union joint for sanitary piping that is assembled by clamping a gasket with a ferrule and tightening with a clamp, wherein a viewing window is provided at one or a plurality of locations on the outer periphery of the arc portion of the arc-shaped clamp band.   2. The clamp according to claim 1, wherein the clamp band is divided into two or more pieces.

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