JPH0347141Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an improvement in the through-hole of a half-blank structure through which piping and wiring of an air conditioner or the like passes.

"Prior Art" Examples of the structure of half-blank holes in conventional air conditioners are shown in FIGS. 5 to 8.

Figure 5 shows an example of a generally used half blank hole, with three connecting parts 21, 22, 23.
is locally provided with a blind plate 27 formed by cuts 24, 25, 26.

Several such holes are provided in an air conditioner or the like, and the connecting portions 21, 22, and 23 are torn off and used as holes for piping and wiring to pass through.

FIG. 6 shows a state in which the connecting portions 21, 22, 23 are torn off and a through hole 31 is formed. Shape edges 28, 29, and 30 are formed toward the surface.

The sharp edges 28, 29, and 30 are dangerous because they may injure the piping, wiring, or the hands of the construction worker during construction or service.

Fig. 7 also shows the conventional half-blank hole structure (numerals are the same as in Fig. 5, and a has been added to the same numbers as Fig. 5), but the difference from Fig. 5 is 3.
The cut portions 24a, 25a, and 26a at the locations have a required width.

This structure has three connecting parts 21a, 22a, 23
A is cut with a nipper or a hacksaw, but in the same way as above, the through hole 31a is cut as shown in FIG.
After forming, the sharp edges 28a, 29
a, 30a remained inside the through hole 31a, resulting in the same problem.

``Problems to be Solved by the Invention'' During construction or service, the joints formed inside the through-holes of half-blank structures can damage piping, wiring, or the workers' hands.

"Means for solving the problems" This invention solves the above conventional problems.
In a half-blank structure through-hole provided for piping, wiring, or duct connection, a through-hole for piping, etc., is provided so that the shape of a plurality of connecting parts is locally set outside of the required through-hole outline.

``Operation'' The above structure prevents the sharp edge from protruding inward from the outer circumference of the through hole.

"Embodiment" FIGS. 1 and 2 show a first embodiment of the present invention.

As shown in FIG. 1, the connecting portions 1, 2, and 3 are provided outside the through-hole outer shell 8 locally formed by the cut portions 4, 5, and 6. FIG. 2 shows the state in which the blind plate 7 is punched out.

The sharp edge parts 9, 10, 11 formed by tearing off the connecting parts 1, 2, 3 do not protrude inward from the through-hole outer shell 8, as shown in FIG.

3 and 4 show a second embodiment of the present invention. (The same reference numerals as in Fig. 1 have been given the same reference numerals as in Fig. 1, with a suffix a added.) The differences from the first embodiment are the cutting parts 4a and 5.
The functions and effects are exactly the same, except that a and 6a are punched out with the required minimum width.

``Effects of the invention'' Due to the structure and operation described above, the shear edge formed at the connecting part is located at a lower position than the outer circumference of the through-hole, so it is easy to prevent piping and wiring from penetrating it, or workers during construction and service. It has an excellent effect of preventing injury to hands, etc.

[Brief explanation of drawings]

1 and 2 show the first embodiment of the present invention,
Figure 1 is before cutting the joint, Figure 2 is after cutting, Figures 3 and 4 are the second embodiment of the present invention, Figure 3 is before cutting the joint, and Figure 4 is after cutting. , FIG. 5 and FIG. 6 show a first example of a conventional through hole. FIG. 5 shows the connection before cutting, FIG. 6 shows after cutting, and FIGS. In two examples, FIG. 7 shows the joint before cutting, and FIG. 8 shows after cutting. 1, 2, 3, 1a, 2a, 3a... joint part,
4, 5, 6, 4a, 5a, 6a... cutting section, 7,
7a...Blind plate, 8,8a...Through hole outline, 9,1
0, 11, 9a, 10a, 11a...sharp edge.

Claims (1)

[Scope of utility model registration request] In a half-blank structure through-hole provided for piping, wiring penetration, duct connection, etc., the shape of the plurality of connecting portions is provided locally and outwardly from the required through-hole outline. Through holes for piping, etc.