KR960005751Y1 - Helmet mask for melting - Google Patents

Abstract

None.

Description

Welding mask

1 is an external perspective view of the present invention.

Figure 2 is a perspective view of the main portion of the shading glass opening and closing device of the present invention.

3 is a plan sectional view showing the detached state of the safety device of the present invention.

Figure 4 (a) (b) is a state diagram showing the detachable state of the safety device of the present invention.

* Explanation of symbols for main parts of the drawings

20: mask body 30: see through

32: guide groove 33: hook portion

34: between guides 35: shading glass plate

36: Rope 37: Operation lever

38: hinge axis

The present design makes it easy to open and close the welding mask shading glass plate to be worn on the face by the upper and lower movements of the jaw, and the shading glass opening and closing device that can increase work efficiency and prevents the shaking of the mask when switching the welding position and firmly adheres to the face. The present invention relates to a welding mask adapted to prevent the protective surface from slipping back and forth, even on the head with the face exposed.

Conventionally, in the welding mask with a fixing band for seating on the head, the opening and closing of the shading glass as a see-through part is made manually, and when the temporary welding or visual confirmation of the welding state of the base material directly, the mask is completely over the head. There was a hassle to check the welding state by raising or lifting by hand. In particular, when one hand is holding the electrode holder or torch and the base material is removed by one hand, the shading glass cannot be opened and closed manually. there was.

In addition, the conventional fixing band has a hinge coupling structure of the upper and left sides of the mask body and only bolts, but the welding mask itself has a relatively large weight, so that the fixing band cannot be held in place, and it is inconvenient to flow back and forth when seated on the head. In particular, there is a problem in that the shading glass is difficult to weld out of the field of view because it flows down by the weight of the mask in the welding position of the bottom view.

In order to solve the above problems, the present invention provides a light shielding opening / closing device on the face of the mask, and an object of the present invention is to provide a safety device easily detachable from the mask.

In order to achieve the above object, the shading glass opening and closing device has one side coupled to a hinge inside the lower portion of the mask body, the other side having an operating lever having a free end, and a hook portion formed at the front end behind the hinge axis of the upper viewing portion. It has a guide rod, and a circular guide groove from the upper side to the lower side is formed on the inner side of the see-through portion of the radius of rotation between the guides, and at the bottom thereof, the groove communicates in the shape of a heart cam, Both sides of the mask fixing band installed on the upper side of the mask features a removable safety device consisting of a link, bolt and spring.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the present invention.

In FIG. 1 and FIG. 2, an operating lever 37 is hingedly coupled to one side surface of the lower inner mask body 20 of the mask body 20 by a hinge, and the other side of the lever 37 is free. At the end, a linear motion rope 36 which transmits the up and down pivoting motion of the operation lever 37 by the jaw to the upper part is connected to the guide section 34 in the see-through part 30. A torsion spring 31 is fitted to the upper hinge shaft 38 of the see-through part 30 so that the shading glass plate 35 connected to the hinge shaft 38 is installed to give a restoring force when rotating and opening, and behind the shading glass plate 35. A hook portion 33 is formed at the tip of the fixed guide section 34 to pivot along the guide groove 32 formed on one side of the see-through portion 30 so that the light shielding glass plate 35 is opened. The lower end of the guide groove 32 is composed of a heart cam so that the light shielding glass plate 35 is closed while the hook portion 33 is raised in accordance with the communication of the guide groove 32 by the elastic force of the material of the hook portion 33 itself upon restoration. .

Meanwhile, the removable safety device 50 will be described. As shown in FIGS. 1 and 3, the fixing band 40 of the mask 10 penetrates the side of the mask body 20. The bolt 53 is configured to be connected to the point of the center portion of the fixing band 40 and the tension spring 51 of the mask 10, and is connected to the link 52 in front of the center point of the band 40 The hinge point is configured, and the hinge point and the bolt 53 are connected by a link 52. When the tension spring 51 pulls the bolt 53, the link 52 is rotated and the mask body 20 is rotated. ) To work. At this time, if the bolt 53 is on the upper portion of the band 40 of the mask 10, the bolt 53 is rotated counterclockwise so that the mask body 20 is seated on the head (see Fig. 4 (a)).

In addition, when the bolt 53 is located below the fixing band 40 of the mask 10, the bolt 53 is rotated clockwise so that the mask body 20 is tightly fixed to the face (refer to FIG. 4 (b)). .

The present invention can reduce the hassle of opening and closing the mask by hand when checking the welding state from time to time during the welding operation, and can quickly and easily open and close the shading glass plate with the face chin, thereby improving the efficiency of the welding operation, and the mask body in the correct position. Since it is fixed seated, it is a practical design that can work safely in any welding position.

Claims (1)

In constructing the light shielding glass opening and closing device of the welding mask, the lower side of the mask body 20 has an operating lever 37 having a free end coupled to one side by a hinge, and the projection 30 of the upper part hinge shaft ( 38) In the rear, the guide section 34 having a hook portion 33 formed at the tip thereof, and on the inner surface of the see-through section 30 of the rotation radius of the guide section 34, a circular guide groove 32 from top to bottom. It has a welding guide, characterized in that the bottom of the circular guide groove 32 is connected to the rope 36 and at the same time to communicate with the heart cam type.