JPH11267878A - Protective shutter device of welding checking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the adhesion of a welding fume, spatter, and the like, and protect a welding checking apparatus by providing an opening/closing shutter mechanism at a monitoring /checking portion of the welding checking apparatus. SOLUTION: When a compressed air is supplied to a cylinder 14 via a supply pipe 17, a connecting member 16 is moved forward by the forward movement of a piston 15. A pin member 12 of a long hole 16a of the connecting member 16 is floating in the long hole 16a, and this floating causes a rotation of a link plate 11 with a shaft supporting member 13 as a supporting shaft. Therefore, if the piston 15 of the cylinder 14 moves forward, a shutter plate 10 adhered to an end part of the shaft supporting member 13 is rotated in an arrow direction to be in an opening condition. When the compressed air supply to the cylinder 14 is stopped, an energizing spring is acted against a forward direction of the built-in piston 15, and the piston 15 is moved backward by the actuation to the closing direction of the shutter plate 10, namely the actuation to the opposite direction to the arrow. Thereby, the opening/closing mechanism of the shutter plate 10 is wall as a link mechanism of the cylinder 14, so as to miniaturize a protective shutter device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection shutter device for a welding inspection tool for protecting a monitoring / detection portion of a welding inspection tool provided in a welding work cart for performing a welding operation inside an existing pipe.

[0002]

2. Description of the Related Art Conventionally, existing pipes P for gas, oil, water, etc.
In general, the joints of single pipes are welded by abutting the joints, but if the penetration at the time of initial welding is insufficient, a poorly welded portion is formed on the inner peripheral surface of the joint of the pipe. Certain recesses may be formed. Moisture or the like, which is a component contained in a gas or the like, accumulates in the recess at such a poor welding location, and may cause corrosion or rust over a long period of time.

[0003] Such pipes are buried in places where there is a lot of traffic, and if an external load is applied to the pipes, the pipes may be distorted or damaged. A series of work carts A shown in FIG.

[0006] A series of work carts A is connected to a welding work cart A 1 for performing repair welding of a defective welding location WP found by inspection. As shown in FIG. 4, the welding work cart A1 is provided with a camera for guiding the welding torch 40 to a defective welding point WP and for monitoring the welding work as well as the welding torch 40 for repair welding as shown in FIG. A surveillance camera 21 and a lighting device 30 provided inside the bracket 20, and a so-called welding inspection tool of a laser light emitting device 31 for accurately grasping the state of the concave portion are also provided.

[0005]

The existing piping P
In the repair welding performed inside the welding machine, spatter and welding fume generated during welding adhere to the monitoring / detection site of the welding inspection tool.For example, in a surveillance camera, the field of view is The problem that the original function cannot be exerted due to the situation of being inhibited has occurred.

Accordingly, the present invention is directed to a welding inspection tool capable of preventing a monitoring / detection portion of a welding inspection tool such as a monitoring camera from adhering spatter or welding fume generated during repair welding work of an existing pipe. It is an object of the present invention to provide a protective shutter device.

[0007]

SUMMARY OF THE INVENTION In order to solve such a problem, a protective shutter device for a welding inspection instrument according to the present invention is used for monitoring or inspecting a welding operation on an inner peripheral surface of an existing pipe inside the existing pipe. It is an object of the present invention to provide a welding inspection tool provided with a shutter mechanism that is disposed at a monitoring / detection site of the welding inspection tool and that opens and closes the monitoring / detection site to prevent adhesion of welding fumes and spatters. This is a means for solving the problem.

[0008] Preferably, the shutter mechanism comprises:
A shutter plate rotatably supported by a shaft support member on a mount member on which the welding inspection tool is arranged, and a shutter plate connected to the shutter plate via a link plate and a connecting member to rotate the shutter plate; It may be configured as a link mechanism incorporating a cylinder as a source.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a welding inspection tool according to an embodiment of the present invention;

FIG. 1 is an explanatory view of a series of work carts A traveling to inspect the inside of an existing pipe P, and FIG. 2 is a perspective view showing a main part of a protective shutter device of the present invention. FIG. 3A is a plan view of the protective shutter device,
FIG. 2B is a sectional view taken along line AA in FIG.

[Structure of Protective Shutter Device] The protective shutter device 1 of the welding inspection tool according to the present invention is used for monitoring or inspecting the welding operation on the inner peripheral surface of the existing pipe P inside the existing pipe P. Device, a laser light emitting device, a monitoring camera, or other such welding inspection tool, which is disposed near a lens or the like that is a monitoring site / detection site of the welding inspection tool. The shutter is provided with a shutter mechanism for preventing adhesion of deposits such as welding fumes.

The above-described shutter mechanism in the present embodiment is arranged in parallel with the welding inspection tool fixed on the mount member 19, and houses the cylinder 14, the connecting member 16, the link plate 11, and the pin member 12. Case member 18
And a shutter plate 10. The link mechanism is housed inside the case member 18 shown in FIGS. 2 and 3 to keep the internal mechanism in a sealed state, thereby protecting against spatter and welding fume generated during welding work.

[Operation of Protective Shutter Device] As shown in FIG. 3, a link mechanism, which is an operating mechanism of the protective shutter device 1, has a cylinder 14 connected to the link plate 11 via a connecting member 16 as described above. The case 18 is provided inside.

In the present embodiment, the driving source of the cylinder 14 for expanding and contracting the link mechanism is compressed air, and the cylinder 14 is compressed by a supply pipe 17 connected to one side of a case member 18. Operates by taking in air. The connecting member 16 of the link mechanism has an elongated hole 16a.
Is formed and is fixed to one end of a piston 15 of the cylinder 14. Further, a pin member 12 and a shaft support member 13 are protruded from the link plate 11, and the pin member 1 is provided.
Numeral 2 is inserted in the long hole 16a so as to freely move. On the other hand, the shaft support member 13 is mounted on a case member 18 and a shutter plate 10 is fixed to an end portion thereof.

With this configuration, the cylinder 1
4 is supplied with compressed air through the supply pipe 17,
The piston 15 moves forward, and as the piston 15 moves forward, the connecting member 16 also moves forward. On the other hand, the long hole 1 of the connecting member 16
When the connecting member 16 moves forward, the pin member 12 of 6a moves in the elongated hole 16a, and this movement changes into rotation of the link plate 11 with the shaft support member 13 as a support shaft. Accordingly, when the piston 15 of the cylinder 14 moves forward, the shutter plate 10 fixed to the end of the shaft support member 13 rotates in the direction indicated by the arrow in FIG.

The operation of the shutter plate 10 in the closing direction,
That is, when the supply of the compressed air to the cylinder 14 is stopped, the operation in the rotation direction opposite to the direction indicated by the arrow in FIG. This is performed by the action of an urging spring (not shown) for applying an urging force to retract the piston 15.

In the description of the present embodiment, the shutter plate 10 of the protective shutter device 1 has been described as a link mechanism that opens and closes with the pivot member 13 as a rotation axis. However, the present invention is not limited to this, and any mechanism may be used as long as the mechanism can block the detection site of the welding inspection instrument. Also, in this embodiment, the drive source of the link mechanism has been described as using compressed air. However, the drive source is not particularly limited to compressed air, and is not limited to compressed air. The piston 15 may be moved in the forward and backward directions by changing the inflow direction of the compressed air, and the same effect can be obtained. Of course.

[0018]

According to the protective shutter device for a welding inspection tool according to the present invention described above, the following effects can be obtained.

(1) By equipping a welding inspection tool with a protective shutter device in which a shutter mechanism is housed in a container having a closed structure, it can operate reliably even in a poor environment with many spatters and welding fumes generated during welding work. In addition, it becomes possible to monitor the welding inspection tool and protect the detection site. (2) The protection shutter device can be downsized by using a link mechanism using an air cylinder as the shutter opening / closing mechanism of the protection shutter device.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a series of work carts A that travels to check the inside of an existing pipe P.

FIG. 2 is a perspective view showing a main part of the protective shutter device of the present invention.

FIG. 3A is a plan view of a protective shutter device,
FIG. 2B is a sectional view taken along line AA in FIG.

FIG. 4 is a perspective view showing an arrangement of a conventional welding inspection tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Protective shutter device 10 ... Shutter plate 11 ... Link plate 12 ... Pin member 13 ... Shaft support member 14 ... Cylinder 15 ... Piston 16 ... Connecting member 17 ... Supply pipe 18 ... Case member 19 ... Mount member 20 ... Camera bracket 21 ... Monitoring camera 30 ... Illuminating device 31 ... Laser light emitting device 40 ... Welding torch A・ ・ Working truck group A1 ・ ・ Welding working truck P ・ ・ ・ Existing piping S ・ ・ ・ Command room WP ・ ・ Poor welding location

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI B23K 9/32 B23K 9/32 J 37/00 37/00 A 37/02 301 37/02 301B G01D 3/08 G01D 3/08 G01N 21 / 88 G01N 21/88 Z (72) Inventor Yuji Hara 2-58, Kashiwamuracho, Yao-shi, Osaka (72) Inventor Takahiko Ohashi 1-2-19 Nakashu, Takarazuka-shi, Hyogo Pref. Ryuichi 1-5-9 Kofudai, Toyono-cho, Toyono-gun, Osaka (72) Inventor Yoichiro Fukushima 6-198, Teramoto, Itami-shi, Hyogo (72) Inventor Ryuji Kuroda 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Steel Tube (72) Inventor Kiyoshi Kanayama 88, Onocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside Japan Pipe Works Co., Ltd. (72) Inventor Isamu 88 Onocho, Tsurumi-ku, Yokohama-shi, Kanagawa Japan Japan Pipe Works Co., Ltd. 72) Inventor Naoki Kawasoe 88, Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Japan Inside Steel Pipe Works Co., Ltd. (72) Inventor Hiroshi Tamaki 88, Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Japan Steel Pipe Works Co., Ltd. (72) Inventor Osamu Tobio 88, Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Japan Steel Pipe Works Co., Ltd. 2-8-65 Yoshinodai-shi, Denyo Co., Ltd. Saitama factory (72) Inventor Kazuyuki Saito 2-8-65 Yoshinodai, Kawagoe-shi, Saitama pref. Saitama factory (72) Inventor Takashi Chino Yoshino, Kawagoe-shi, Saitama 2-8-65 Denyo Co., Ltd. Saitama Factory

Claims (2)

[Claims] 1. A welding inspection tool for monitoring or inspecting a welding operation on an inner peripheral surface of an existing pipe inside an existing pipe, wherein the welding inspection tool is disposed at a monitoring / detection site of the welding inspection tool. A protection shutter device for a welding inspection instrument, comprising a shutter mechanism for opening and closing a detection site to prevent adhesion of welding fumes, spatters, and the like from a welding torch. 2. The shutter mechanism comprises: a shutter plate rotatably supported by a shaft support member on a mount member on which the welding inspection tool is disposed; and a shutter plate via a link plate and a connecting member. Concatenate,
The protection shutter device for a welding inspection tool according to claim 1, further comprising a link mechanism that incorporates a cylinder that is a rotation drive source of the shutter plate.