JP3486306B2 - Wiring assembly clamping device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for fastening and fixing a tubular member and a wiring assembly inserted therein.
In particular, the present invention relates to a clamp device for fastening and fixing while maintaining a sealing property between the two. 2. Description of the Related Art When wiring is passed through a wall separating different atmospheres, a hermetic seal is often required. In this case, it is preferable to integrate the wiring into an appropriately shaped filler block and to provide a sealing member between the block and the through wall. For example, FIG. 3 and FIG. 4 show a connecting pipe 5 joined to a nozzle 3 by connecting a thermocouple withdrawal pipe supporting column 1 for guiding a thermocouple for detecting the temperature of each part inside the reactor vessel to the outside through a reactor vessel top cover. Is shown. In the drawing, a split ring 7 is fitted into a circumferential groove at the neck portion of the draw-out pipe support column 1, and a push-up ring 9 surrounding the split ring 7 is attached to the push-up bolt 1.
1 supported. This lifting bolt 11 is shown in FIG.
As shown in FIG. 6, six push-up rings 9 are inserted at equal circumferential intervals, and when this is turned in a predetermined direction, the amount of protrusion increases, and the push-up ring 9 is pulled away from the end of the connection pipe 5,
The lifting ring 9 is moved upward. Thereby, the shoulder 1a of the extraction pipe support column 1 approaches the inner shoulder 5a of the connection pipe 5,
A compressive force is applied to the gasket 13 placed therebetween. In this way, a sealing property is provided between the connection pipe 5 and the extraction pipe support column 1, and both are firmly fastened. FIGS. 5 to 8 show another type of clamp mechanism. In the figure, the upper end surface of the connection pipe 15 is formed in a truncated conical surface, and the lower surface of the push-up metal fitting 17 fitted in the circumferential groove of the neck of the drawing pipe support column 1 is formed in a truncated conical surface. As shown in FIG. 6, the push-up fitting 17 has an exploded assembly structure fixed by fixing bolts 19 and nuts 18, and is easily fitted to the neck. A link-type clamp 20 is provided between the truncated conical surface at the upper end of the connection pipe 15 and the truncated conical surface at the lower end of the push-up fitting 17. As shown in FIG. 7, the link-type clamp 20 includes three arc links 21 and a clamp 23 having substantially the same shape as the three joint plates 25 and 1.
The eyebolts 27 are sequentially connected to form an annular connection. The inner peripheral end 21a of the arc link 21 and the inner peripheral end 23a of the clamp 23 are formed in a wedge-shaped cross-section as shown in FIG. 5, while both peripheral ends are formed as clevis as shown in FIGS. The joint plate 25 is formed in the central groove 21b.
Are inserted and connected by a support pin 29 like a roller chain. In such a clamp mechanism, when the nut 31 screwed into the screw portion of the eyebolt 27 is tightened up, the three arc links 21 and the clamp fittings 23 are formed.
Is constricted, that is, displaced radially inward, and the inner peripheral ends 21a, 21a
The push-up fitting 17 is pushed up by the wedge action of 3a (FIG. 5). In this manner, the draw-out pipe support column 1 is displaced upward, the shoulder 1a of the draw-out tube support column 1 approaches the inner shoulder surface 15a of the connecting pipe 15, and applies a compressive force to the gasket 13 placed therebetween. It is joined while performing sealing. [0004] As described above, a large number of push-up bolts 11 are used in the clamp mechanism (FIGS. 3 and 4) using the push-up ring 9. In order to obtain proper sealing performance, it is necessary to apply uniform compressive force to the gasket, so it is necessary to use a torque wrench or the like to control the tightening torque of many push-up bolts to be equal,
There is a problem that the tightening work becomes complicated. Also, in the clamp device (FIGS. 5 to 8) using the circularly arranged arc links, the number of tightening points is greatly reduced and the mounting operation time is short, but the constituent members such as the arc links of the clamp device are supported. The inward displacement of the arc link is not uniform since it can rotate around the pin, making it difficult to achieve uniform tightening or uniform compression of the gasket. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a wiring assembly clamping apparatus which can perform a simple mounting and tightening operation in a short time and can obtain good sealing performance. According to the present invention, there is provided a guide tube having a deep shoulder surface on an inner surface of an end portion, and a gasket inserted into the guide tube. A clamp device for fixedly connecting a wiring assembly having an outwardly facing shoulder surface facing the rearward shoulder surface via an annular contact that comes into contact with the pipe end surface of the guide tube and penetrates the wiring assembly. A member, an annular holding member that penetrates the wiring assembly and coaxially faces the annular contact member, a gripping mechanism that fixes the wiring assembly to the annular holding member, the annular contact member, and the annular member. A push-spread mechanism disposed between the respective frusto-conical surfaces of the holding member, wherein the push-spread mechanism is fixed to the base plate having a hole in the center thereof through which the wiring assembly passes, and the base plate. Inserted between the frusto-conical surfaces Between a fixed cam having a wedge-shaped tip and the frusto-conical surface
It is eccentric so that it can move in and out and can rotate freely on the base plate.
A pair of eccentric cams disposed therein, and a handle for rotating the eccentric cam , wherein when the handle is rotated , the eccentric cam is rotated.
Is pushed between the frusto-conical surfaces,
The annular holding member is pushed up, thereby causing the wiring assembly
The body is pushed up . Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that the same portions are denoted by the same reference numerals throughout the drawings including the drawings used in the description of the above-mentioned conventional technology. Referring to FIGS. 1 and 2, a wiring assembly to be connected, that is, a drawing pipe support column 1 and a guide pipe, that is, a connecting pipe 5
Is shown in phantom to distinguish it from the clamping device 40 according to the invention, in which a gasket 13 is sandwiched between the shoulder 1a of the draw-out tube support column 1 and the inner shoulder 5a of the connecting tube 5. . Explaining the structure of the clamp device 40, an annular contact member, that is, a lower tapered sleeve 41 is mounted on the outer annular surface of the stepped upper end surface of the connection pipe 5, and the upper end surface is formed as a truncated conical surface 41a. Have been. The inner diameter of the lower tapered sleeve 41 is relatively large, and the small-diameter lower end of the annular holding member, that is, the upper tapered sleeve 43 is the lower tapered sleeve 4.
1 is slidably fitted. Upper taper sleeve 4
3, a downwardly-pointed frusto-conical surface 43a is formed coaxially opposite to the frusto-conical surface 41a, and a groove structure 45 having a wedge-shaped cross section is provided between the two opposing frusto-conical surfaces 41a, 43a. Is formed. As described above, a push-spread mechanism 50 described later is attached to the groove structure 45 formed by the upper and lower tapered sleeves 43, 41. That is, the fixed cam 51 whose front end is fitted into the groove structure 45 is fixed to the base plate 53 by the bolt 55. The central portion of the base plate 53 has an oval hole 57 whose minor axis is slightly larger than the outer diameters of the lower taper sleeve 41 and the upper taper sleeve 43, and receives them as shown in FIG. .
Symmetric fan-shaped eccentric cams 59 and 61 are disposed on the base plate 53 opposite to the fixed cam 51 with the drawer tube support column 1 to the upper tapered sleeve 43 interposed therebetween. Eccentric cams 59, 6
1 is rotatably supported on a base plate 53 via a rotating shaft 57, and a handle 63 is attached to an upper end of each rotating shaft 57. The outer peripheral tips of the eccentric cams 59 and 61 have a wedge-shaped cross section that fits into the groove structure 45 similarly to the fixed cam 51. Further, a holding mechanism including a lock claw 71 and a push bolt 73 is attached to a hollow portion above the upper tapered sleeve 43. And by adjusting the tightening of the push bolt 73,
The lock claw 71 is moved in the horizontal direction and fitted into the circumferential groove at the neck of the pull-out tube support column 1 to connect and fix the upper tapered sleeve 43 and the pull-out tube support column 1. The mounting and operation of the clamp device 40 having the above structure will be described. The handle 63 is held at a position shown by a solid line in FIG.
In addition, the clamp device 40 with the lock claw 71 of the gripping mechanism in the unlocked position is passed through the pull-out tube support column 1 and set on the upper end surface of the connection tube 5. And push bolt 7 as described above
Then, the lock pawl 71 is fitted into the circumferential groove at the neck of the draw-out tube support column 1, and the upper tapered sleeve 43 is connected to the draw-out tube support column 1 and fixed. Thereafter, the handle 63 is rotated toward the position indicated by the two-dot chain line, and the outer peripheral tips of the eccentric cams 59 and 61 are pushed into the groove structure 45. Then, the upper tapered sleeve 43 is pushed up by the wedge action of the outer peripheral tip portions of the eccentric cams 59 and 61 having the wedge-shaped cross section and the opposing frusto-conical surfaces 41a and 43a of the groove structure 45, whereby the draw-out tube support column 1 is moved. Pushed up. In this way, the shoulder 1a of the pull-out pipe support column 1 is connected to the inner shoulder 5a of the connecting pipe 5.
And the gasket 13 between them is compressed and comes into close contact with the shoulder 1a of the draw-out pipe support column 1 and the inner shoulder 5a of the connecting pipe 5. In this way, a seal between the draw-out tube support column 1 and the connecting tube 5 is achieved. As described above, according to the present invention,
By rotating the handle by a predetermined angle, the wiring assembly and the guide tube passing therethrough can be clamped while maintaining the sealing function, so that the tightening operation can be performed easily in a very short time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an embodiment of the present invention. FIG. 2 is a sectional view taken along the line II-II of FIG. FIG. 3 is a vertical sectional view showing a conventional clamp structure. FIG. 4 is a plan view corresponding to FIG. FIG. 5 is an elevational sectional view showing another conventional clamp structure. FIG. 6 is a plan view taken along the line VI-VI in FIG. 5; FIG. 7 is a plan view taken along the line VII-VII in FIG. 5; FIG. 8 is a side view corresponding to FIG. 7; DESCRIPTION OF SYMBOLS 1 Pull-out pipe support column 5 Connecting pipe 13 Gasket 40 Clamping device 41 Lower tapered sleeve 41a Truncated conical surface 43 Upper tapered sleeve 43a Truncated conical surface 51 Fixed cam 53 Base plate 55 Bolt 57 Oval hole 59, 61 Eccentric cam 63 Handle

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-62583 (JP, A) JP-A-10-47565 (JP, A) JP-A-10-47566 (JP, A) JP-A-10- 48383 (JP, A) JP-A-7-191181 (JP, A) JP-A-63-128292 (JP, A) JP-A-63-120906 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G21C 13/036 F16L 23/02 G21C 13/028 G21D 1/00 G21C 17/02 G21C 17/10

Claims (1)

(57) [Claims 1] A guide tube having a shoulder facing inward at an inner surface of an end portion, and an outside facing the shoulder facing through a gasket and inserted into the guide tube. In a clamp device for fixedly connecting a wiring aggregate having a facing shoulder surface, an annular contact member that is in contact with a pipe end surface of the guide tube and that penetrates the wiring aggregate, and that penetrates the wiring aggregate. An annular holding member coaxially opposed to the annular contact member, a gripping mechanism for fixing the wiring assembly to the annular holding member, and a truncated conical surface of each of the annular contact member and the annular holding member. A base plate having a hole at the center thereof through which the wiring assembly passes, and a wedge-shaped tip fixed to the base plate and inserted between the truncated conical surfaces. a fixed cam having a left between the frusto-conical surface
It is eccentric so that it can be submerged and is rotatably arranged on the base plate.
A pair of eccentric cams, and a handle for rotating the eccentric cam . When the handle is rotated, the eccentric cam
Is pushed between the frusto-conical surfaces, whereby the ring
The shape holding member is pushed up, whereby the wiring assembly
The wiring assembly is clamped.