JPH0954193A - Wiper device for radiation shield window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a wiper device for radiation shield window which can efficiently wipe the hot side cover glass of radiation shield window without damaging and is superior in durability. SOLUTION: While a drive motor 8 is stopped, a wiper arm 2 is positioned at one end of the reciprocal motion range with a balance weight 9, a wiper blade 3 is put apart from the surface of the hot side cover glass 1 with a remote cam 5 and a cam guide 6. For wiping, the wiper blade 3 is reciprocally moved in arc in parallel state by the driving motor 8 by way of the wiper arm 2 and a press support mechanism 4 to clean the effective view range of the hot side cover glass 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot side cover glass installed inside a radiation shielding window (hot side) for directly monitoring the inside of a closed chamber accommodating a nuclear facility, a facility for handling radioactive materials, etc. The present invention relates to a wiper device for a radiation shielding window, which wipes and cleans the dirt.

[0002]

2. Description of the Related Art A radiation shielding window is a part of a shielding wall made of concrete or the like that surrounds a closed room that houses a facility that handles radioactive substances, and is used for remote observation by handling means such as observation of the inside and robot hands and overhead traveling cranes. It is installed for. What is necessary for this radiation shielding window is that it has the same radiation shielding ability as a shielding wall such as concrete,
Also, the inside (hot side) is clearly visible.
Therefore, the radiation shielding window includes a shielding glass containing lead oxide and a window frame for incorporating the shielding glass.
The window frame is composed of an outer metal frame that is airtightly fitted and fixed to the opening of the shielding wall, and an inner metal frame that is fitted and mounted to the outer metal frame, and the shielding glass is fitted to the inner metal frame. It is installed. Further, cover glasses are attached to both the inside and outside to protect the shielding glass. Gaskets are attached to both the inside and outside of these fitting parts to hermetically seal them.

[0003]

The hot side cover glass of the radiation shielding window may become dirty due to various operations performed in the hot side room and the field of view may be narrowed or clouded. Will be needed.

However, the conventional hot side cover glass is not provided with a dedicated wiping / cleaning means, and a manipulator installed for performing various operations is held and wiped by a wiping / cleaning tool. It was

However, in this case, it takes time to wipe and clean, and the hot side cover glass may be damaged.

It is an object of the present invention to provide a wiper device for a radiation shielding window which can be wiped and cleaned efficiently without damaging the hot side cover glass of the radiation shielding window and which is excellent in durability.

[0007]

In order to achieve the above object, the present invention uses a base end as a fulcrum, and a distal end about the fulcrum as a center to reciprocate the effective visual field range of the hot side cover glass of the radiation shielding window in an arc shape. A wiper arm having a parallel link, the base end side of which is pivotally attached to a substantially central portion of one side of the radiation shielding window so as to operate, and which is always positioned by a balance weight to one end side of the reciprocating operation range; A wiper blade that is attached to the tip of the wiper arm via a press contact support mechanism described later, and wipes and cleans the effective field range of the hot side cover glass surface in an arc shape in a parallel state; and the wiper blade and the wiper arm. The wiper blade is installed between the tip and elastically presses the wiper blade against the hot side cover glass surface, and the wiper blade is attached to the hot side. A pressure contact support mechanism that supports the wiper arm so that it can be separated from the bar glass surface, and a wiper blade installed on the edge frame of the hot side cover glass and the pressure contact support mechanism corresponding to a positioning position at one end side of the reciprocating range of the wiper arm. The separating cam and the cam guide, and a drive motor for imparting reciprocating motion to the wiper arm via a transmission mechanism including a crank and a link are provided on the base end side of the wiper arm.

The wiper arm is positioned to one end of the reciprocating range by the balance weight while the drive motor is stopped, and the wiper blade is held away from the hot side cover glass surface by the separating cam and the cam guide. . Further, at the time of wiping and cleaning, the drive motor reciprocates the wiper blade in an arc in a parallel state via the wiper arm and the pressure contact support mechanism to wipe and clean the hot side cover glass surface.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view seen from the hot side of a radiation shielding window equipped with a wiper device of the present invention, FIG. 2 is a vertical sectional side view of FIG. 1, and FIG. 3 is a pressure contact support mechanism and a cam for separation. 2 is a schematic perspective view of a cam guide, 1 is a cover glass on a hot side of a radiation shielding window, 2 is a wiper arm, 3 is a wiper blade, 4 is a pressure contact support mechanism, 5 is a separating cam, 6 is a cam guide, and 7 is a cam guide. Is a transmission mechanism, 8 is a drive motor,
9 is a balance weight, 10 is a shielding glass, 11 is an inner metal frame, and 12 is an outer metal frame.

The radiation shielding window is airtightly fitted and attached to the inner metal frame 11 by combining a plurality of shielding glasses 10, and is airtightly fitted and attached to the outer metal frame 12 through the inner metal frame 11.

The wiper arm 2 forms a parallelogram with two parallel links 2a and 2b and connecting rods 2c and 2d connecting the base ends and tips of the links 2a and 2b, and at the apex position thereof. A parallel link mechanism is configured by pivotally pivoting with a pin. The connecting rod 2c on the base end side is
It is attached to the outer metal frame 12 by the attachment substrate 13. As a result, the wiper arm 2 uses the base end as a fulcrum, and the base end is radiation shielded so that the tip reciprocates around the fulcrum in an arc shape in the effective visual field range of the hot side cover glass 1 of the radiation shield window. The window is pivotally attached to the outer metal frame 12 at approximately the center of one side of the window (in the drawing, the upper side is shown, but the other side may be used). A balance weight 9 is attached to the base end extension 2a 'of one of the links 2a, and the balance weight 9 always positions the wiper arm 2 to one end of the reciprocating range.

The wiper blade 3 is attached to the tip of the wiper arm 2 via a pressure contact support mechanism 4, and is used for wiping and cleaning the effective field range of the surface of the hot side cover glass 1 in an arc shape in a parallel state. , A natural rubber, a synthetic rubber, a plastic, or the like is formed into a rod shape having a modified cross-section formed on both sides with a target lip shape, and its base is fitted and fixed to the holding plate 3a.

In the pressure contact support mechanism 4, a first plate member 4a is connected to a holding plate 3a of the wiper blade 3 via an elastic member 4b such as a leaf spring, and a second plate member 4c is attached to the wiper arm 2. These are fixed to the connecting rod 2d at the tip,
The plate member 4a and the second plate member 4c of the connecting member 4d, 4
A coil which is connected to the surface of the hot side cover glass 1 via e so as to be parallel to and away from each other while maintaining a parallel state, and which is arranged between the plate members 4a and 4c. The wiper blade 3 is elastically pressed against the surface of the hot side cover glass 1 by elastic members 4f, 4g such as springs, and the wiper blade 3 is supported so as to be separated from the surface of the hot side cover glass 1. It was done.

The separating cam 5 and the cam guide 6 correspond to a positioning position on one end side of the reciprocating range of the wiper arm 2 and a part of the first plate member 4a of the press contact support mechanism 4 and the hot side. The wiper blade 3 is installed on a part of the edge frame 1a of the cover glass 1, and when the wiper device is not in use, the balance weight 9 causes the wiper blade 3 to be hot when the wiper arm 2 is positioned at one end side of the reciprocating range. This is for keeping it apart from the surface of the side cover glass 1. In the embodiment shown in the drawings, the separating cam 5 is attached to a part of the first plate member 4a of the press contact support mechanism 4, and the cam guide 6 is hot. The case where it installs in a part of edge frame 1a of the side cover glass 1 is illustrated. These may be installed opposite to each other. The surface of the separating cam 5 that contacts the cam guide 6 is an inclined surface 5a, which allows the separating cam 5 to ride on the cam guide 6 and separate the wiper blade 3 from the surface of the hot side cover glass 1. It is possible to leave. When the separating cam 5 rides on the cam guide 6, the first plate member 4a is moved to the elastic member 4.
This is made possible by moving the second plate member 4c side against f and 4g.

The transmission mechanism 7 includes a crank 7a and a link 7b.
And the crank 7a is the output shaft 8a of the drive motor 8.
The crank 7a and the base end extension 2a 'of one of the links 2a of the wiper arm 2 are connected by a link 7b.

The drive motor 8 is attached to the attachment substrate 13, and when the hot side cover glass 1 is wiped and cleaned,
Driven by commands from the cold side, crank 7
The wiper arm 2 is reciprocated through a transmission mechanism 7 including a and a link 7b.

The wiper device of the present invention has the above-mentioned structure, and its operation will be described below. First, in a normal state,
The wiper device is kept unused. In this state, the drive motor 8 is stopped and the wiper arm 2
Is positioned to one end side of the reciprocating range by the balance weight 9, and the separating cam 5 and the cam guide 6
Thus, the wiper blade 3 is held away from the surface of the hot side cover glass 1.

When the hot side cover glass 1 becomes dirty,
The drive motor 8 is driven to give a reciprocating motion to the wiper arm 2 via the transmission mechanism 7 including the crank 7a and the link 7b. Since the wiper blade 3 is attached to the tip of the wiper arm 2 via the pressure contact support mechanism 4,
The wiper blade 3 is reciprocally moved in a parallel state in an arc by the reciprocating movement of the wiper arm 2 while being elastically pressed against the hot side cover glass 1.

Since the wiper arm 2 employs a parallel link structure, the wiper blade 3 can be moved in parallel even if the wiper arm 2 reciprocates in the same reciprocal angle range. Therefore, the wiper arm 2 simply reciprocates in a fan-shaped range. The wiping and cleaning range can be increased more than when exercising. Of course, it is also possible to equip a cleaning liquid supply means to improve the cleaning effect.

[0020]

According to the present invention, the wiper arm is positioned to one end of the reciprocating range by the balance weight while the drive motor is stopped, and the wiper blade is moved to the hot side cover glass surface by the separating cam and the cam guide. Since it is possible to keep the wiper blade away from, it is possible to avoid the wiper blade from being continuously pressed against the hot side cover glass surface by the pressing contact support mechanism when not in use, thereby preventing deterioration of the wiper blade, and It is possible to prevent the problem of adhesion to the surface of the cover glass on the hot side, improve the durability, and prevent the view of the radiation shielding window from being obstructed. Then, at the time of wiping and cleaning, the drive motor can reciprocate the wiper blade in an arc shape in a parallel state via the wiper arm and the pressure contact support mechanism to efficiently wipe and clean the effective visual field range of the hot side cover glass. It does not damage the side cover glass.

[Brief description of drawings]

FIG. 1 is a front view of a radiation shielding window equipped with a wiper device of the present invention as viewed from the hot side.

FIG. 2 is a longitudinal sectional side view of FIG.

FIG. 3 is a schematic perspective view of a pressure contact support mechanism, a separating cam, and a cam guide.

[Explanation of symbols]

 1 Hot Side Cover Glass 2 Wiper Arm 3 Wiper Blade 4 Pressure Contact Support Mechanism 5 Separation Cam 6 Cam Guide 7 Transmission Mechanism 8 Drive Motor 9 Balance Weight 10 Shielding Glass 11 Inner Metal Frame 12 Outer Metal Frame 13 Mounting Board

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masayoshi Yoshio 2-7-1 Harusan, Otsu-shi, Shiga Nihondenki Glass Co., Ltd. (72) Inventor Takahiro Nakayama 2-7-1 Harashi, Otsu, Shiga No. within Nippon Electric Glass Co., Ltd.

Claims (1)

[Claims] 1. The base end is one of the radiation shield windows so that the base end serves as a fulcrum and the tip reciprocates around the fulcrum in an arc shape in the effective visual field range of the hot side cover glass of the radiation shield window. A wiper arm consisting of a parallel link that is pivotally attached to the substantially central portion of the side and is always positioned by the balance weight to one end side of the reciprocating motion range, and attached to the tip of the wiper arm via a press contact support mechanism described later. And a wiper blade for wiping and cleaning the hot side cover glass surface in an arc shape in a parallel state in an effective visual field range, and the wiper blade is installed between the wiper blade and the tip of the wiper arm. A pressure contact support mechanism that elastically presses against the cover glass surface and supports the wiper blade so as to be separable from the hot side cover glass surface. A wiper blade separation cam and a cam guide installed on the edge frame of the pressure side support glass and the hot side cover glass corresponding to a positioning position on one end side of the reciprocating range of the wiper arm; A wiper device for a radiation shielding window, comprising: a drive motor for providing a reciprocating motion to the wiper arm via a transmission mechanism including a crank and a link on a base end side.