JP2597134Y2 - Clamping device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device capable of quickly and reliably fastening a flange. In particular, the present invention relates to a clamp device that is advantageous for attaching and detaching adjacent flanges adjacent to each other, a flange provided in a small space where it is difficult to insert a tightening bolt, a flange provided at a high temperature, and the like.

[0002]

2. Description of the Related Art Flanges are generally fastened to opposing flanges using bolts and nuts, regardless of their planar shape. However, tap bolts, swing bolts, special clamps, and the like are used for special conditions, for example, for a flange provided in a small space that is difficult to insert a normal bolt and that is difficult to tighten. In the case of flanges used in high-temperature furnaces, the threaded surface of the bolt and nut is seized, making it difficult to tighten or loosen. It is aimed at prevention.

[0003]

[Problems to be solved by the invention] In order to use tap bolts, swing bolts and special clamps instead of ordinary bolts and nuts, it is necessary to individually design the thickness of the flange, the mounting of the bolts and the design of the clamps. is there. In addition, flanges such as high-temperature furnaces are often heated up to the bolts and nuts, which poses a problem in terms of work safety, and the necessity of applying graphite paste to the threaded surface every time the nut is loosened. was there. In addition, when the number of bolts and nuts is increased, including the case where ordinary bolts and nuts are used, it takes a long time to attach and detach the flange, and there are many cases where measures to solve the problem become problematic. The purpose of the present invention is that it is suitable for a flange around a flange or a flange of a high-temperature device such as a heating furnace, and can easily attach and detach a flange in a short time with a simple operation even when the number of fastening bolts is large. It is to provide a clamping device.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a clamping device for fastening a flange 1 and a flange 2, wherein the bearing members 3, 3 'arranged side by side on the flange 1 and the bearing members 3, 3 are provided.
, A handle member 5 rotatably mounted on the handle members 5 via the main shafts 4 and 4 ', a fastening bolt support member 8 rotatably mounted on the handle member 5 via the sub shafts 7 and 7', and a fastening bolt support Member 8
Bolt 10 movably inserted into a through hole 9 provided in
A bolt head or an engaging nut 11 at one end of the fastening bolt 10 to be engaged with the flange 2, an adjusting nut 12 screwed to the other end of the fastening bolt 10, a fastening bolt support member 8 and an adjusting nut 12. And a holding spring 13 inserted into the fastening bolt 10 between them, the fastening bolt 10 is moved, the bolt head or the engaging nut 11 is engaged with the flange 2, and the handle 6 is turned to Provided is a clamping device for fastening 1 and 2.

Further, it is preferable that the above-mentioned clamp device is provided with a stopper pin 17 which is inserted into the bearing members 3 and 3 'and engages with the handle member 5. Further, in these clamp devices, a pressing spring is provided. As 13, it is preferable to use a disc spring.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described with reference to the drawings showing embodiments. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a plan view of FIG. 1, FIG. It is the top view which cut out one part.

First, the structure and mounting method of the clamp device of the present invention will be described. Flanges 1 and 2 have
In order to insert and engage a fastening bolt 10 for fastening the two, usually U-shaped cutout holes 14 and 15 are provided. A third flange and other members can be inserted between the flanges 1 and 2. Reference numeral 18 denotes an O-ring, but a seal member having another shape may be used. A normal bolt hole may be provided instead of the notch hole 14 and / or 15, but as described in the operation method described later, the notch hole allows the fastening bolt 10 and the flange 2 to be easily separated from each other. Preferred. The planar shape of the notch hole 14 or 15 is
The shape is not limited to the U-shape, and any shape may be used as long as it can be engaged with the fastening bolt 10 while maintaining the required strength. Instead of providing a notch or the like, a special engagement member can be used to directly engage the edge of the flange 2. The bearing members 3 and 3 ′ are provided side by side on both sides of the notch hole 14 on the surface of the flange 1. Normally, a plate-shaped member having an appropriate thickness and shape is fixed to the flange 1 by welding, but the present invention is not limited to this. Good. Further, in this example, the bearing member is divided into two members. However, for example, the bearing member may be constituted by one member having a U-shape in plan view.

[0008] In order to rotatably mount a handle member 5 having an operation handle 6 to the bearing members 3 and 3 ', the handle member 5 is parallel to the joint surface between the flanges 1 and 2 and on the same central axis. Attach spindles 4 and 4 '. In this embodiment, the main shaft is divided into 4 and 4 ', but it is not always necessary to divide the main shaft. However, by splitting the spindle,
Since the central axis of the fastening bolt 10 and the central axis of the main shafts 4 and 4 'can cross or approach each other, there is an advantage that a tensile load acting on the fastening bolt 10 can be advantageously received. The main shafts 4 and 4 'are provided with bearing members 3 and 3
′ Or the handle member 5 and the other is rotated and slid. If the main shafts 4 and 4 'are fixed with set bolts, the handle member 5 and the like can be easily removed.
It is convenient for maintenance.

The handle member 5 includes a fastening bolt support member 8
Is rotatably mounted via sub-shafts 7 and 7 'which are parallel to the joint surface between the flanges 1 and 2 and are on the same central axis. The mounting position of the fastening bolt support member 8 is brought close to the main shafts 4 and 4 'so that the weighted portion of the handle 6 is leveraged. The method of dividing and attaching the sub shaft is the same as that of the main shaft.

[0010] The fastening bolt supporting member 8 includes a fastening bolt 10.
And a through hole 9 for inserting and holding the fastening bolt 10 so as to be movable in the axial direction. Usually, the central axis of the through hole 9 is
Are provided in a plane orthogonal to the central axis of One end of the fastening bolt 10 has a bolt head or an engaging nut 11 that is inserted into the cutout hole 15 and engages with the flange 2. Withstand the load required to fasten the flange 1 and the flange 2;
To facilitate engagement, a bar 16 may be inserted into the bolt head or engagement nut 11, or a flanged nut or washer may be used. Further, a recess may be provided in the flange 2 surface at a portion where the bolt head or the engagement nut 11 is joined so as to be in close contact with the flange 2 surface.

A holding spring 13 for fastening the flanges 1 and 2 is inserted into the other end of the fastening bolt 10, and an adjusting nut 12 for adjusting the fastening force is screwed on. That is, between the adjustment nut 12 and the fastening bolt support member 8,
The holding spring 13 which expands and contracts in the axial direction of the fastening bolt 10 and any necessary members such as washers are sandwiched together. A coil spring or the like may be used as the holding spring 13, but a disc spring is convenient. For example, when used face-to-face like an abacus ball, the amount of flexure increases and fine adjustment becomes easy, and when they are overlapped in the same direction, a large tightening force can be obtained. Therefore, it is possible to obtain a desired function by combining them in a compact manner according to the actual use. Although it is possible to attach the holding adjustment nut 12 and the holding spring 13 to the flange 2 side, it is preferable to attach the holding adjustment nut 12 and the holding spring 13 to the handle member 5 side. Usually, there is no space on the flange 2 side,
Further, when used in a high-temperature furnace or the like, the heat of the flange is not directly transmitted to the pressing spring 13, so that the pressing spring 13 is not heated and a stable tightening force is obtained.

Further, the handle member 5 in a state of fastening the flanges 1 and 2 is erroneously rotated and moved, and the fastening bolt 1
In order to ensure that 0 does not come off the flange 2,
It is desirable to provide a locking mechanism. For example, in this embodiment, the handle member 5 can be locked by inserting the stopper pin 17 into the bearing members 3 and 3 '. When removing the flange 1, it is convenient to attach a stopper to the handle 6 so that the fastening bolt 10 does not interfere.
FIG. 4 is a plan view showing a state where a plurality of clamping devices of the present invention are mounted on the flange.

Next, an operation method of the clamp device of the present invention will be described. When the handle 6 is tilted in the direction of arrow A in FIG. 1 during mounting, the handle member 5 pivotally moves about the main shafts 4 and 4 '. The fastening bolt 10 is slid in the direction of the flange 2 and pivotally moved about the countershafts 7 and 7 ′ so that the notch holes 14 and 15 are inserted so that the bolt head or the engaging nut 11 is sufficiently engaged with the flange 2. Insert After confirming the engagement, the handle 6 is tilted in the direction of arrow B in FIG. The bolt head or the engagement nut 11 is lifted upward in the drawing while being engaged with the flange 2, and the flange 1 and the flange 2 are tightened. The stopper pin 17 is inserted to fix the handle member 5, and the tightening of the clamp device of the present invention is completed. The clamping device attached to the flange 1 is sequentially tightened, and the fastening operation to the flange 1 and the flange 2 is completed. Removal is the reverse of this procedure.

[0014]

According to the present invention, a large number of flange fastening bolts can be quickly tightened by using the clamp device of the present invention. In addition, if the expansion and contraction force of the holding spring is adjusted to be constant by the adjustment nut in advance, the flange can be always fixed with a constant tightening force even if the operator changes. Even when the temperature of the flange becomes high, the work can be easily tightened and loosened without directly touching the bolts and nuts, so that the operation is safe. The adjustment nut is
Since there is no direct contact with the high-temperature flange, seizure does not occur, and even if seizure occurs, the fastening bolt can be easily loosened and the flange can be opened.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a clamp device according to the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 shows an example of a mounting mode of the clamp device of the present invention.
The top view which cut out some flanges.

[Explanation of symbols]

1: Flange 2: Flange 3, 3 ': Bearing member 4, 4': Main shaft 5: Handle member 6: Handle 7,
7 ': counter shaft 8: fastening bolt support member 9: through hole 10: fastening bolt 11: bolt head or engagement nut 12: adjusting nut 13: holding spring 14: notch hole 15: notch hole 16: bar 1
7: Stopper pin 18: O-ring

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroo Tsuruno 1515 Otsutsui, Matsumae-cho, Iyo-gun, Ehime Prefecture Inside the Ehime Plant of Toray Industries, Inc. Company Ehime Plant (72) Inventor Toshiki Kawamura 1515 Tsutsui, Matsumae-cho, Iyo-gun, Ehime Prefecture Toray Co., Ltd. Ehime Plant (56) References JP-A-64-65319 (JP, A) JP, A) JP-A 1-149900 (JP, U) JP-B 61-39524 (JP, B2) JP-B 56-13092 (JP, Y2) JP-B 62-30061 (JP, Y2) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) F16B 2/18 F16B 5/00

Claims (3)

(57) [Scope of request for utility model registration] 1. A clamping device for fastening a flange 1 and a flange 2, comprising a bearing member 3, 3 'juxtaposed on the surface of the flange 1, and a main shaft 4, 4' connected to the bearing member 3, 3 '. A handle member 5 rotatably mounted, a fastening bolt support member 8 rotatably mounted on the handle member 5 via sub shafts 7 and 7 ', and a through hole 9 provided in the fastening bolt support member 8. A fastening bolt 10 freely inserted, a bolt head or an engaging nut 11 at one end of the fastening bolt 10 to be engaged with the flange 2, an adjusting nut 12 screwed to the other end of the fastening bolt 10, a fastening bolt support A holding spring 13 inserted between the member 8 and the adjusting nut 12 to the fastening bolt 10, and by moving the fastening bolt 10 to engage the bolt head or the engaging nut 11 with the flange 2, 6 to rotate the flanges 1 and 2 A clamping device for fastening. 2. The clamping device according to claim 1, further comprising a stopper pin which is inserted through the bearing members and engages with the handle member. 3. The clamping device according to claim 1, wherein the spring is a disc spring.