JPH0318089Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a clamping device for a drilling machine that is devised so that the drilling machine can be quickly fixed to a gas pipe, etc. and can immediately start drilling operations. .

[Conventional technology] When a problem such as a gas leak occurs in a gas pipe, in order to quickly stop the gas, a drilling machine is used to make a hole upstream of the gas leak, and a hole called a gas bag is inserted through this hole. There is a well-known method of shutting off gas by inserting a shutoff device and inflating the shutoff device.

FIG. 1 shows an example of how to attach the perforator to the gas conduit in this known example. First, a clamp table 02 is fixed to the gas conduit 01 using, for example, a chain, and the lower end of the perforator 03 is placed in the clamp table 02. of the drilling machine 03, and press the collar protruding from the lower end of the drilling machine 03 with the fixing nut (cap nut) 04.
3 is fixed to the clamp stand 02, and then the drilling operation begins.

[Challenges Required for Prior Art] In gas pipeline construction, in order to minimize the amount of gas leakage, drilling work must be performed quickly. When setting the punching machine 03 and screwing in the fixing nut 04, it takes time to screw it in with the clamp base 02, and the fixing, or tightening, is not completed unless the fixing nut 04 is turned several times, so it cannot be completely tightened. There is a problem in that even an experienced person will spend an unexpected amount of time before tightening the hole and moving on to the next drilling operation. Therefore, the amount of gas leakage increases.

The object of the present invention is to provide a clamping device that allows a drilling machine to be quickly attached to a gas conduit and to immediately begin drilling operations.

[Means for Solving the Problems] The configuration of the present invention proposed to achieve the above object is as follows.

A clamp table having a fixing means for the pipe, a hole in the center of the upper surface through which a cutter passes, and a stopper pin protruding from the side of this hole, and a clamp table having three positions around the hole of the clamp table at equal intervals. a washer holder formed with a lower step on the inner side of the washer holder, the lower edge of which is engaged with the step of the washer holder, and an internal thread cut into the inner peripheral surface of the clamp ring. a washer pressed from above by a screw against the lower edge of the clamp ring in order to fix the lower edge of the clamp ring between the washer receiver; and a screw for fixing the washer;
A stopper that functions as a stopper because one of the screws protrudes higher than the other screws.
A screw and an external thread to be screwed into the internal thread of the clamp ring are cut on the outer peripheral surface, and an engaging flange is protruded from the upper surface at a symmetrical position on the inner diameter side, and the engaging flange is horizontally and radially A drilling machine comprising a movable ring having a handle protruding from the bottom thereof, and a fixed collar protruding horizontally from a lower end of the movable ring at a symmetrical position on the outer circumference of a mounting opening, which can be freely engaged from below with the engaging collar of the movable ring. Machine clamp device.

[Function] In the above-mentioned clamp device, the clamp ring is fixed in advance on the clamp table using washers, and the movable ring is screwed into the clamp ring to assemble it. At the site,
This assembled clamp stand is fixed to the gas conduit. Next, insert the lower end of the drilling machine into the clamp base so that the fixed flange on the drilling machine side does not touch the engaging flange on the movable ring side, and set it so that the stopper pin touches the fixed flange from the side. . In this state, if you hold the handle of the movable ring and turn it 90 degrees, the engaging flange of the clamp ring will come onto the fixed flange of the drilling machine, and the drilling machine will be fixed to the clamp stand.

When removing the drilling machine, reverse the handle.
When the movable ring is rotated 90 degrees and the engaging flange of the movable ring is released from the fixed flange, the drilling machine can be pulled upwards and removed.

[Example] Figs. 2 to 6 show a clamp device according to the present invention. Reference numeral 1 designates a clamp stand fixed to the gas conduit 2 using a chain 3, and has a flat top surface. Reference numeral 4 denotes a hole opening in the center of the clamp base 1, and 5, 5', and 5'' are the upper surface of the clamp base 1, and holes are formed at equal intervals on concentric circles around the hole 4. This washer receiver is formed with step portions 6, 6', 6'' that are lowered one step on the inner side of the washer holder. 7 is the washer receiver 5, 5',
A lower edge flange 8 rests on the stepped portions 6, 6', 6'' of 5'', and washers 10, 10', 1 are placed on the lower edge flange 8.
0'', screws 11, 11', 11'', and the inner circumferential surface has an internal thread 9.
is cut out. 12 is one screw 11''
This is a stopper member attached to the screw 11'' in order to project upward and function as a stopper.

13 has an external thread 14 cut into the outer circumferential surface to be screwed into the internal thread 9, and has engaging flanges 15, 15' projecting in symmetrical positions with a diameter slightly smaller than the inner diameter and at an angle slightly smaller than the 90° divergence angle. This engaging collar 15,
15' and extending horizontally behind the handles 16, 15' respectively.
16' is attached to the movable ring.

Reference numeral 17 denotes a perforator, and fixed flanges 18 and 18' having a width that fits between the engaging flanges 15 and 15' are horizontally protruded from the lower end of the perforator 17 at symmetrical positions.
19, 19' are stopper pins protruding from the outside of the hole 4 of the clamp base 1, and the fixing collar 1 of the drilling machine 17 is attached to the stopper pins 19, 19'.
8 and 18' hit, and the punch 17 does not turn.

When using the above clamp device, attach the lower end flange 8 of the clamp ring 7 to the clamp base 1 in advance.
The stepped portions 6, 6' of the washer receivers 5, 5', 5'',
6" and washers 10, 10', 10",
Fix it using screws 11, 11', and 11'', and screw the external thread 14 of the movable ring 13 into the internal thread 9 of this clamp ring 7, leaving enough force to loosen or tighten it within a 90° range. , this is connected to the gas conduit 2 using the chain 3 as shown in Figure 3.
Fixed to. In addition, when setting this, the stopper member 12 (screw 11'') is attached to the clamp ring 7.
It is set so that it is located on the side where it cannot be loosened (rotated) any further when it is loosened by 90 degrees. When a gas leak or the like occurs and it becomes necessary to drill a hole for inserting a gas bag, the clamp device thus set is brought to the site.

Then, at the site, the clamp device (clamp table 1) is fixed to the gas pipe 2 using the chain 3, and then the fixed flanges 18, 18' of the punching machine 17 are fixed to the fixed flanges 15, 15' of the movable ring 13. Insert it into the movable ring 13 and clamp ring 7 in time,
and the collar 18 fixed to the stopper pins 19, 19';
18', and the tip of the punch 17 is brought into contact with the periphery of the hole 4 of the clamp base 1. In this state (Fig. 5), the drilling machine 17 is stopped and the handle 1 is
Rotate 6 and 16' by 90 degrees in the direction of arrow a in FIG. As a result, the movable ring 13 is screwed in a little, and the engaging flanges 15, 15' of this movable ring 13 are attached to the drilling machine 1.
The fixed collar 18, 1 comes above the fixed collar 18, 18' of 7.
Hold 8'. This state is shown in FIG. 6, in which the punching machine 17 is fixed on the clamp table 1.

Next, when removing the punch 17, the handle (16') is rotated 90 DEG until it hits the stopper member 12, as shown by arrow b in FIG. 6, in the opposite direction. As a result, the movable ring 13 loosens and the engaging flanges 15, 15' escape from above the fixed flanges 18, 18'. As a result, the punch 17 becomes free and can be freely pulled up and removed.

[Effects of the present invention] As described above, in the present invention, the clamp ring is fixed in advance on the clamp table using a washer receiver and screws for fixing the clamp ring, and the movable ring is attached to the clamp ring in the tightening direction by 90 degrees. It was made so that it could be assembled by screwing it in, leaving a margin of rotation angle of °.

As a result, the entire device can be assembled in advance, and in case of an emergency, it can be immediately fixed to the gas pipe.
Simply insert the lower end of the drilling machine into the movable ring clamp ring and use the handle to rotate the movable ring 90 degrees.
In other words, since the drilling machine can be fixed to the clamping device with one touch, it does not require time or skill to set it up unlike in the past, and a lot of time is not wasted on installing the drilling machine. This has the effect of quickly shutting off the gas in the event of a gas leak.

In addition, since the clamp base, clamp ring, and movable ring of the present invention can be disassembled, it does not take up much space for storage and is convenient for transportation.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional clamp device;
Fig. 2 is an exploded perspective view of a clamp device showing an embodiment of the present invention, Fig. 3 is a perspective view of the parts shown in Fig. 2 assembled and fixed to a gas conduit, and Fig. 4 is a perspective view of a clamp device showing an embodiment of the present invention.
5 and 6 are explanatory views of the operation of the clamping device shown in the embodiment, FIG. 5 is an explanatory view of the state in which the perforator is inserted, and FIG. 6 is an explanatory view at the end of setting. 1... Clamp base, 5, 5', 5''... Washer receiver, 7... Clamp ring, 10, 10',
10″... Washer, 11, 11', 11″...
Screw, 12...Stopper member, 13...Movable ring, 15, 15'...Engaging collar, 17...Drilling machine,
18, 18'...Fixed tsuba.

Claims (1)

[Scope of Claim for Utility Model Registration] A clamping table having means for fixing the pipe, having a hole in the center of the upper surface through which a knife passes, and a stopper pin protruding from the side of the hole; A washer receiver is formed with stepped portions that are lowered on the inside, which are attached at three locations around the hole at equal intervals, and a lower edge engages with the stepped portions of the washer receiver, and an internal thread is formed on the inner circumferential surface. a washer which is pressed onto the lower edge of the clamp ring from above with a screw in order to fix the lower edge of the clamp ring between the washer receiver and the washer receiver;
and, among the screws for fixing the washer, one of the screws functions as a stopper by protruding upwardly than the other screws, and an external thread that is screwed into the internal thread of the clamp ring. A movable ring which is cut on the outer peripheral surface, has an engaging flange protruding from the upper surface at a symmetrical position on the inner diameter side, and has a handle protruding horizontally and radially from the engaging flange, and a mounting opening at the lower end. A clamping device for a drilling machine, comprising: a drilling machine having a fixed collar projecting horizontally at a symmetrical position on the outer circumference and capable of engaging with the engaging collar of the movable ring from below;