JPH0317547Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a device for attaching a switchbox to a bar by using knock-out holes on a bar stretched between lightweight steel sections. It is.

(Prior Art) Conventionally, in order to attach a switchbox to a bar stretched between lightweight steel bars, for example, a square bar, as shown in FIG. 6, the bottom plate 21 of the switchbox S is positioned almost vertically. Screw 22 in the center of
The mounting bracket 23 is fixed through the mounting bracket 23, and the switch box S is attached to the corner bar 24 via the mounting bracket 23.
was installed.

Further, as a device for attaching a switchbox to a bar of this type, there was a hanging rod device for an outlet box described in Japanese Patent Publication No. 5135/1983.

This example includes a tube that has a hole for inserting a hanger rod and is attached to a punching hole of an outlet box, a head that is smaller in diameter than the tube and has a bottom wall with a screw hole, and this head and the A yoke consisting of an inclined wall that connects the tube, and a screw threaded tube having a bottom wall with a hole in line with the screw hole, and a wall surrounding the punching opening of the outlet box. a screw inserted into a hole in the bottom wall of the tube having the thread and a thread in the hole in the bottom wall of the head; The outer diameter of the head is made approximately equal to the inner diameter of the cylinder provided with the thread, and the head is placed into the cylinder provided with the thread, so that the holes through which the screw passes are brought close to each other, After inserting the yoke into the suspension rod, the fixing hole of the outlet box is brought into contact with the yoke, the stud is fitted into the yoke from inside the outlet box, and both are fixed with a screw. The outlet box is fixed by pressing it against the hanging rod.

(Problem to be solved by the invention) Since the conventional method is as described above, in the former case, the attachment strength of the switchbox S to the square bar 24 is small, and even after installation, the switchbox S does not move in the longitudinal direction of the square bar 24. In addition, since the switchbox S is located on one side of the square bar 24 in the installed state, the weight of the switchbox S acts on itself as a rotational moment, causing the switchbox to move. The problem was that the fixation was easy to loosen.

In addition, in the latter case, it is necessary to insert a yoke into the hanging rod in advance, which is troublesome if the hanging rod is long. It is impossible to adjust the position in the direction, and since the switchbox is fixed by pressing against the hanging rod, there is a problem that the mounting strength is not strong.

In view of these drawbacks, the present invention utilizes the knock-out holes of the switchbox to easily and firmly adjust the position of the switchbox on the bar in a direction perpendicular to the longitudinal direction of the bar, regardless of the form of the switchbox. The object of the present invention is to provide a device for attaching a switchbox to a bar, which can be fixed to a bar.

(Means for Solving the Problems) The present invention has a fitting part projecting from the main body that is rotatably fitted into the knock-out hole of the switch box, and when the fitting part is fitted into the knock-out hole of the switch box. A first fixture is provided with a bolt insertion hole for inserting a fixing bolt whose center is offset from the center of the knockout hole, and a holding part for holding the bar on the main body. and a second fixture having a bolt insertion hole through which the fixing bolt is inserted;
A female thread is provided in either the bolt insertion hole of the first fixture or the bolt insertion hole of the second fixture, and the fitting part of the first fixture is inserted into the knockout hole of the switch box. In the fitted state, the first fixture is brought into contact with the inner surface of the switchbox, and while the bar is held by the holding part of the second fixture, the second fixture is brought into contact with the outside surface of the switchbox. The first and second fixtures are brought into contact with each other and connected by screwing the fixing bolt into the female thread, and the first and second fixtures are brought into contact with each other. The side plate or bottom plate of the switchbox is sandwiched between the bar and the switchbox is attached to the bar so that its position can be adjusted in a direction perpendicular to the longitudinal direction of the bar.

(Example) Embodiments of the present invention will be described based on the drawings.

Embodiments of the present invention are shown in FIGS. 1 to 5, and first the first fixture A ₁ and the second fixture A ₂ will be described.

As shown in FIGS. 2 and 4, the first fixture A ₁ has a fitting portion 3 that is rotatably fitted into the knockout hole 2 of the switch box S on the bottom surface of the disc-shaped main body 1. A nut (female threaded part) having a center C 2 at a position offset from the center C ₁ of the knock-out hole 2 by an amount of deviation e when the nut is fitted into the knock-out hole ₂ of the switch box S.
4 is embedded in the main body 1. Further, the main body 1 is provided with a bolt insertion hole 5 through which a fixing bolt 10 is inserted concentrically with the center of the buried nut 4.

As shown in FIG. 2, the second fixture _A2 has a rectangular parallelepiped-shaped main body 6 whose upper surface forms a contact surface 7 that abuts against the outer surface of the switch box S, and one end of the main body 6. A square groove-shaped holding part 9 for holding the square bar 8 is provided open on the top surface, and a bolt insertion hole 11 for inserting a fixing bolt 10 through the center part of the main body 6 is provided in the upper and lower surfaces. It is something.

To attach the switchbox S to the square bar 8 using the first and second fixtures A ₁ and A ₂ , insert the first fixture A ₁ into the interior of the switchbox S, and then insert the first fixture A 1 into the switchbox S. With the fitting part 3 fitted into the knockout hole 2, the first fixture _A1 is brought into contact with the inner surface 12 of the switchbox S, and with the square bar 8 held by the holding part 9, the second fixture A1 is brought into contact with the inner surface 12 of the switchbox S.
Attachment A ₂ to the outside surface 1 of the switch box S
3. In this state, when the fixing bolt 10 inserted into the bolt insertion hole 11 of the second fixture A ₂ and the nut 4 embedded in the first fixture A ₁ are screwed together, the result shown in FIG. like,
The switchbox S is attached to the square bar 8 with the side plate 14 of the switchbox _S and the square bar 8 being sandwiched between the first fixture A1 and the second fixture _A2 .

Therefore, the switch box S for the square bar 8
The mounting strength of the switch box S is increased, and the knockout hole 2 provided in the side plate 14 of the switch box S is increased.
When using the switch box S, the switch box S is mounted on the square bar 8, so the weight of the switch box S hardly acts on itself as a rotational moment, and this Therefore, the attachment part will not come loose over a long period of time.

Furthermore, the center C2 of the nut ₄ embedded in the main body 1 of the first fixture _A1 is offset from the center _C1 of the knockout hole 2 by an amount e when the nut 4 is fitted into the knockout hole 2 of the switch box S. Because I am doing
If the distance in the direction orthogonal to the longitudinal direction of the corner bar 8 between the corner bar 8 and the opening surface of the switch box S in the state shown in FIG. 5B is L, then in the state shown in FIG. The distances between the square bar 8 and the opening surface of the switch box S in the direction orthogonal to the longitudinal direction of the square bar 8 are L+e and L, respectively.
-e.

Therefore, when the first fixture A ₁ is brought into contact with the inner surface 12 of the switchbox S, the main body 1 is rotated and the nut 4 embedded therein is moved in the longitudinal direction of the square bar 8 with respect to the switchbox S. By adjusting the position in the direction orthogonal to the square bar 8, the distance between the corner bar 8 and the opening surface of the switch box S in the direction orthogonal to the longitudinal direction of the square bar 8 can be set within a certain range (twice the amount of deviation e). It becomes possible to freely adjust it within. Therefore, even if the switch boxes S have different heights, the switch box S can be moved from the square bar 8.
The distance in the direction orthogonal to the longitudinal direction of the square bar 8 to the opening surface of the square bar 8 can be made constant, and the switchbox S can be mounted close to the wall surface.

Furthermore, although the nut 4, which is a female thread, is provided in the bolt insertion hole 5 of the first fixture _A1 , it can be freely provided in the bolt insertion hole ₁₁ of the second fixture A2.

Further, the holding portion 9 provided on the second fixture _A2 may have a semicircular cross-sectional shape to hold a round bar having a circular cross section, and a switchbox may be attached to the round bar. Furthermore, the fixing bolt integrally protruding from the first fixture and the female thread provided on the second first fixture are connected by screwing together, and the switchbox is attached to the bar. Alternatively, the switchbox S may be attached to a bar using the knockout hole 2 provided in the bottom plate 15 of the switchbox S.

In addition, the knockout hole 2 of the switch box S
is circular in shape, but when using a switch box with a square knock-out hole,
The shape of the fitting part 3 of the first fixture _A1 is made into a square shape, and each side of the square knock-out hole is adjusted as appropriate.
It is free to provide it so that it can rotate in 90° increments.

(Effects of the invention) Since the invention has the above-mentioned configuration, it has the following effects.

(1) The center of the bolt insertion hole of the first fixture is offset from the center of the knockout hole when the switchbox is fitted into the knockout hole, so the bolt of the first fixture is By adjusting the position of the insertion hole relative to the switchbox, the distance between the bar and the opening surface of the switchbox in the direction orthogonal to the longitudinal direction of the bar can be freely adjusted within a certain range. Even switchboxes of different sizes can be installed with a constant distance between the bar and the opening surface of the switchbox in the direction orthogonal to the longitudinal direction of the bar, which allows the switchbox to be installed close to the wall surface. be able to.

(2) Fit the fitting part provided on the first fixture into the knockout hole of the switchbox, and connect the side plate or bottom plate of the switchbox and the bar between the first fixture and the second fixture. Since the switchbox is attached to the bar with the two parts sandwiched between the two, the switchbox can be easily attached to the bar from both sides of the bar, and the switchbox can be attached to the bar with great mounting strength. There is no possibility that the switchbox will move along the length of the bar.

(3) When using the knockout hole provided on the side plate of the switchbox, the switchbox is attached to the bar with the switchbox placed on top of the bar, so the weight of the switchbox is reduced against itself. This causes almost no rotational moment, and therefore the mounting portion will not loosen over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a switchbox attached to a square bar using the attachment device according to the present invention;
Figure 2 is an exploded perspective view of the same, Figure 3 is a partially cutaway side view of the same, Figure 4 A is a bottom view of the first fixture, and Figure 4 is a sectional view taken along line X-X of the same A. , FIGS. 5A to 5C show the direction perpendicular to the longitudinal direction of the corner bar between the corner bar and the opening surface of the switchbox by adjusting the position of the nut embedded in the main body of the first fixture with respect to the switchbox. FIG. 6 is a perspective view of a conventional example. Explanation of the symbols of the main parts, A ₁ ...First mounting fixture, _A2 ...Second mounting fixture, S...Switchbox, 1...Main body of first mounting, 2...Knockout hole, 3 ... Fitting part, 4 ... Nut (female thread), 5 ... Bolt insertion hole, 6 ... Main body of second fixture, 8 ... Square bar (bar), 9 ... Holding part, 10 ... Fixing bolt, 11 ... Bolt insertion hole, 12 ... Inner surface of switch box, 13 ...
...outer surface of the switch box, 14... side plate of the switch box, 15... bottom plate of the switch box.

Claims (1)

[Claims for Utility Model Registration] The main body 1 is provided with a protruding fitting portion 3 that is rotatably fitted into the knock-out hole 2 of the switch box S, and the fitting portion 3 is rotatably fitted into the knock-out hole 2 of the switch box S.
The fixing bolt 1 has a center C 2 at a position offset from the center C ₁ of the knockout hole ₂ when fitted into the fixing bolt 1.
A first fixture A1 is provided with a bolt insertion hole ₅ for inserting the bar 8, and a holding part 9 for holding the bar 8 is provided in the main body 6, and a fixing bolt 10 is inserted therein. a second fixture A ₂ having a bolt insertion hole 11 therethrough, and a bolt insertion hole 5 of the first fixture A ₁ or a bolt insertion hole ₁₁ of the second fixture A 2 . A female screw portion 4 is provided on either side, and with the fitting portion 3 of the first fixture A ₁ fitted into the knockout hole 2 of the switchbox S, the first fixture A ₁ is attached to the switchbox S. and the second fixture A 2 is brought into contact with the outside surface 13 of the switch box S while the bar ₈ is held by the holding part 9 of the second fixture A ₂ . The first and second fixtures A ₁ , A ₂ ,
By screwing the fixing bolt 10 into the female screw part 4, they are drawn together and connected, and the side plate 14 or the bottom plate 15 of the switchbox S is connected between the first fixture _A1 and the second fixture _A2 . and a bar 8, and the switchbox S is attached to the bar 8 so that its position can be freely adjusted in a direction perpendicular to the longitudinal direction of the bar 8.