JP2992315B2 - Switch device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch device including an embedded wiring device and a mounting frame used when the wiring device is embedded on a construction surface. is there.

[Prior Art] When mounting a wiring device or the like embedded in a wall or the like, a metal mounting frame or the like has been used. This mounting frame
It has a rectangular frame shape made of annealed SPCC (cold rolled copper), and has a structure in which wiring equipment with standardized module dimensions can be detachably attached.

[Problems to be Solved by the Invention] However, when a wiring device having a wide operation handle such as a piano handle switch is mounted using this type of mounting frame, the mounting frame is embedded in a wall surface by an electric screwdriver or the like. When the screw is fixed to the mounting box, the mounting frame is deformed, which causes a problem that the movement of the handle is deteriorated and the operability of the handle is deteriorated.

The present invention has been made in view of the above points, and an object of the present invention is to construct a wiring device using a mounting frame that is not easily deformed even when screwed into an embedding box with an electric screwdriver or the like. And a switch device that can be embedded in the switch.

Means for Solving the Problems In order to achieve the above object, the present invention provides a standardized embedded wiring device and a rectangular frame-shaped mounting frame used when the wiring device is embedded on a construction surface. And a switch device, the mounting frame includes both side pieces, and both end pieces bridging between both ends of both side pieces, and an insertion hole into which a mounting member for mounting the mounting frame to the construction surface is inserted. Screw holes for screwing plate screws for attaching the plate frame to the front surface of the mounting frame are formed on both end pieces, respectively, and the connecting portions with both end pieces of the both side pieces project diagonally forward and to the case of wiring equipment. The hanging pieces formed with insertion holes for inserting the formed locking projections are made to protrude from the outer edges of both side pieces to the back side, respectively.Furthermore, this mounting frame is made of metal with high bending limit material. is there.

[Operation] The present invention has a structure in which the connecting portions of the both sides of the mounting frame and the both ends thereof project obliquely forward as described above, and the hanging pieces project from the outer edges to the rear side, respectively. An insertion hole into which a mounting member for mounting the mounting frame to the construction surface is inserted in both end pieces by increasing the strength against a two-dimensional moment applied by an electric screwdriver or the like so as to prevent deformation. And a screw hole for screwing a plate screw for mounting the plate frame on the front surface of the mounting frame, respectively, so that the mounting frame can be mounted on the construction surface using the mounting member, and A plate frame can be attached to the front.

Further, by forming the mounting frame from a metal having a high bending limit, deformation of the mounting frame can be further reduced.

Embodiment An embodiment of the present invention is shown in FIGS. As shown in FIG. 1, the mounting frame 1 of this embodiment has a rectangular frame shape, and has a horizontally long insertion hole 11 formed at the center of both end pieces 1a.
As shown in FIG.
Is screwed into the embedding box 5 to attach the mounting frame 1 to the embedding box. A screw hole 12 is formed outside each of the insertion holes 11, and a plate screw is screwed into the screw hole 12 to attach the plate frame to the mounting frame 1. The connecting portions of both side pieces 1b of the mounting frame 1 and both end pieces 1a are projected obliquely forward, and a hanging piece 13 is projected from the outer edge of each side piece 1b to the back side. Three pairs of insertion holes 14 are formed individually. In other words, this mounting frame 1 can vertically mount three prefabricated one-module embedded wiring devices 2.

A wiring device 2 buried in a wall or the like using a metal mounting frame 1 of this type has a pair of locking projections on both side surfaces of the case.
The projection 21 is provided, and the hanging piece 13 is flexed outward by utilizing the flexibility of the hanging piece 13 of the mounting frame 1, and the locking projection 21 is inserted into the insertion hole 14 to be attached to the mounting frame 1. It is attached. At this time, the locking projection 21 is locked in the insertion hole 14 so that the mounting frame 1 is
Is fixed to the wiring device 2. When the wiring device 2 is to be removed, the hanging piece 13 may be bent outward to remove the locking projection 21 from the insertion hole 14.

By the way, as the above-mentioned ready-made embedded wiring device 2, a ready-made wiring device 2 such as a piano handle switch is used.
Are attached to a piano handle 22 having a size in which three are arranged vertically. Here, this piano handle 22
One side is pivotally attached to a pivot 23 formed on one side of the upper surface of the case, and when the other end is pressed, the push button 24 that rotates and vertically moves is pressed. In this case, when the mounting frame 1 is screwed to the mounting box with an electric screwdriver or the like,
When the mounting frame 1 is deformed, the movement of the piano handle 22 is deteriorated, and the operability is deteriorated.

Therefore, in this embodiment, as described above, both side pieces 1b of the mounting frame 1 are provided.
The connecting portion with the both end pieces 1a is raised obliquely upward, and the hanging pieces 13 are hung downward from the outer edges of the respective side pieces 1b to increase the strength against a two-dimensional moment applied by an electric screwdriver or the like. , So as not to cause deformation.

However, it is difficult to say that such a shape alone can sufficiently prevent deformation. Therefore, in the case of this embodiment, the mounting frame 1 is made of a metal having a high bending limit value, for example, SP.
Made of CC1 / 4H or SUS430. In general, there is no significant difference in the flexural modulus of a steel plate, and when there is a condition that the plate thickness does not change much in the configuration of the device, it should be formed of a material having a high bending limit value as described above. Is preferred.

The amount of deformation of the mounting frame 1 with respect to the screw tightening torque of the mounting frame 1 formed of the above-mentioned metal and the mounting frame 1 conventionally formed of SPCC was set. The measurement was performed in the state shown in FIG. Here, the processing dimension 1 of the embedding hole was set to 100 mm, and the amount of sinking at the center when the mounting frame 1 was deformed as shown by the broken line in the figure was measured as the amount of deformation. The results shown in FIG. 2 were obtained by the above measurement. As is clear from the measurement results, the amount of deformation of each mounting frame 1 is the same up to the tightening torque of about 8 kg · cm. However, the SPCC
Exceeds the elastic limit at 8 kgcm, causes plastic deformation, and does not return to its original shape even when the load is removed. On the other hand, SPCC1 / 4H and SUS430 have high bending limits, and almost return to their original shape up to the measured 10 kg · cm. It is to be noted that the tightening torque when a normal person performs tightening has a margin. Here, SPCC1 /
Although only 4H and SUS430 have been exemplified, the same effect can be expected even if the mounting frame 1 is formed using other metal having a high bending limit value.

By the way, in the above description, a case where a metal having a high bending limit value is used has been described. However, the mounting frame 1 formed by processing the SPCC is chemically treated to increase the surface strength, The limit value may be increased. Here, as such a processing method, there are an oxynitriding treatment and a tactride treatment.

For example, when the bending limit values of the untreated SPCC mounting frame 1 and those subjected to gas oxynitriding and liquid oxynitriding are measured, the results shown in FIG. 3 are obtained. As is clear, even those that have been oxynitrided are 8 kgcm
No significant deformation from Examining the cross-sectional structure in this case, as shown in FIG. 4, a compound (iron nitride) layer of about 62 μm was formed, and a part of the surface side was a porous layer B. The structure was such that a diffusion layer c was formed at the back of b. Here, the following table shows the results of measuring the distance (mm) from the surface and the height Hv at that location with a measurement load of 100 g.

FIG. 5 shows the results of this table as a graph. Similarly, in the case of the liquid oxynitriding treatment, a table in which the distance (mm) from the surface and the altitude Hv at that position were measured at a measurement load of 100 g and the altitude Hv at that location is shown below, and the graph is shown in FIG.

[Effect of the Invention] As described above, the present invention configures a switch device with a standardized embedded wiring device and a rectangular mounting frame used when the wiring device is embedded on a construction surface, The mounting frame includes both side pieces and both end pieces that bridge between both ends of the both side pieces, respectively, and an insertion hole into which a mounting member for mounting the mounting frame to the construction surface is inserted, and a plate frame in front of the mounting frame. Screw holes into which the plate screws for attachment are screwed are formed on both end pieces, respectively, and the connecting portions of the both side pieces with the both end pieces are projected obliquely forward, and locking projections formed on the case of a ready-made wiring device. Since the hanging piece with the insertion hole for inserting is projected from the outer edges of both side pieces to the back side respectively,
There is an advantage that the strength with respect to the two-dimensional moment applied by the electric screwdriver or the like can be increased, and the mounting frame can be hardly deformed. Moreover, an insertion hole into which a mounting member for mounting the mounting frame to the construction surface and a screw hole into which a plate screw for mounting the plate frame is screwed on the front surface of the mounting frame are formed in both end pieces. Therefore, the mounting frame can be mounted on the construction surface using the mounting member, and the plate frame can be mounted on the front surface of the mounting frame.

Further, by forming the mounting frame from a metal having a high bending limit, there is an advantage that the deformation of the mounting frame can be made more difficult to occur in combination with the structural change of the mounting frame.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, FIGS. 2 and 3 are graphs showing deformation amounts with respect to tightening torque, respectively.
FIG. 4 is an explanatory view showing a cross-sectional structure of the metal subjected to the chemical treatment, FIGS. 5 and 6 are graphs showing an improved state of the hardness of the metal subjected to the chemical treatment, and FIG. 7 is an explanatory view of a measuring method. It is. 1 is a mounting frame, 1a is an end piece, 1b is a side piece, 13 is a hanging piece, 14 is an insertion hole, 15 is a connecting portion, 2 is a wiring device, and 21 is a locking projection.

Claims (2)

(57) [Claims] The present invention comprises a standardized embedded wiring device and a rectangular frame-shaped mounting frame used when the wiring device is embedded on a construction surface. Screws having both end pieces bridging between both end portions, wherein a mounting screw for mounting the mounting frame to the construction surface is inserted and a plate screw for mounting the plate frame on the front surface of the mounting frame is screwed. Holes are formed in both end pieces, respectively, and the connecting parts of both side pieces with the both end pieces are projected diagonally forward, and the hanging pieces formed with insertion holes for inserting the locking projections formed in the case of the wiring device are formed on both sides. A switch device characterized by projecting from the outer edge of each piece to the rear side. 2. The switch device according to claim 1, wherein said mounting frame is made of a metal having a high bending limit.