JP3034365U - A felt-tip pen for scoring with a mounting hole insertion shaft - Google Patents

Abstract

(57) [Abstract] An object of the present invention is to insert into a mounting hole of a device for electrical wiring, which is formed in a thin cylindrical shape or an elliptical shape, and to draw a score. SOLUTION: A shaft portion from which a felt core 4 protrudes is
A mounting hole insertion shaft portion 1 is formed by forming a cylindrical shape having a diameter D = 3 to 4 mm and a length L = 25 to 30 mm.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a scoring felt-tip pen, and more particularly to a scoring felt-tip pen mainly required for positioning wiring and devices in electrical work.

[0002]

[Prior art]

 Conventionally, felt-tip pens for scoring have been used to position wiring and equipment in electrical work. (One example, manufactured by Mirai Kogyo Co., Ltd., product name, marking pen)

[0003]

[Problems to be solved by the device]

 As shown in Fig. 2, for example, a conventional felt-tip pen for scoring has a large shaft diameter at the mounting shaft port from which the felt core a is projected (for example, about 6 mm), and most of them have a grip shaft. The taper is formed to have a large diameter (for example, a diameter of about 12 mm) toward the part side. However, among the commonly used electrical wiring devices, for example, the integrated wattmeter shown in Fig. 3, the instrument box mounting plate (manufactured by Mirai Kogyo Co., Ltd.), and the earth leakage breaker shown in Fig. 4 (Tempar Kogyo) Etc. are usually fixed to the wall surface with a tapping screw with a diameter of 4 mm and a long screw thread under the neck (about 35 mm), but as shown in FIG. 3 or FIG. Since the mounting hole H for inserting is formed into a cylindrical shape with a diameter of 5 mm and a length of 20 to 25 mm so that the spiral screw part of the tapping screw can be inserted, the tip of the conventional scoring felt pen is 6 m in diameter. A taper with a large diameter part of 12 mm cannot be inserted into the mounting hole H for marking, and a wiring cover (Fig. Famous slim duct SD The mounting hole H of Inaba Denki Sangyo Co., Ltd. is also formed so as to be pierced into an elliptical shape with a short diameter side of 4 mm, and the scoring felt-tip pen does not have the tip of the shaft portion for scoring. It had a problem that it could not be used.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a mounting hole formed in a cylindrical shape having a diameter of 5 mm for receiving a tapping screw. It is intended to provide a scoring felt pen that is suitable for electrical work that can be used for scoring the attachment holes of the above-mentioned electric equipment having H, or the wire cover on the minor axis side of 4 mm, and is convenient. is there.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, a felt-tip pen for scoring according to the present invention is configured such that a protruding shaft portion of a felt core is formed into a cylindrical shape having a diameter of 3 to 4 mm and a length of 25 to 30 mm. A shaft is provided.

[0006]

[Action]

 Since the mounting hole insertion shaft is inserted deep into the mounting hole of electrical equipment and there is only a gap of about 0.5 mm between the inner surface of the mounting hole and the outer periphery of the mounting hole insertion shaft. The felt core can mark the center position of the mounting hole accurately.

[0007]

[Embodiment of the invention]

 In FIG. 1, a mounting hole loosely fitting shaft 1 is provided at the center of one end face 3 of the gripping shaft 2 so as to project in a cylindrical shape parallel to the longitudinal direction of the gripping shaft 2. 1 has a length L = 25 to 30 mm and a diameter D = 3 to 4 mm. Reference numeral 4 denotes a felt core which is inserted into the mounting hole insertion shaft 1 and the tip of which is projected to the center of the tip surface 5 of the mounting hole insertion shaft 1.

[0008]

[Effect of the invention]

 The mounting hole insertion shaft has a cylindrical or elliptical mounting hole for inserting tapping screws for electrical wiring equipment, and has a clearance of about 0.5 mm. Since the felt core protruding from the center of the tip surface of the mounting hole insertion shaft can be used for marking, the felt core can accurately mark the center of the mounting hole.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of a scoring felt pen provided with a mounting hole inserting shaft.

FIG. 2 is a front view of a tip portion of a conventional scoring felt-tip pen.

FIG. 3 is a perspective view of a partially cut off wattmeter mounting plate showing a usage mode of the present invention.

FIG. 4 is a perspective view of an earth leakage breaker showing a usage mode of the present invention.

FIG. 5 is a perspective view of a wiring cover showing a usage mode of the present invention.

[Explanation of symbols]

 1 Mounting hole insertion shaft 2 Grip shaft 3 One end surface 4 Felt core 5 Tip surface

[Procedure amendment]

[Submission date] September 10, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

Claims (2)

[Utility model registration claims] 1. A shaft portion from which a felt core 4 projects,
A scoring felt pen provided with a mounting hole insertion shaft portion formed by forming a mounting hole insertion shaft portion 1 into a cylindrical shape that can be inserted into a mounting hole of a device for electrical wiring. 2. The mounting hole insertion fitting shaft portion 1 according to claim 1 has a diameter D.
= 3 to 4 mm, length L = 25 to 30 mm, a scoring felt pen provided with a mounting hole inserting shaft portion formed in a cylindrical shape.