JPH085537Y2 - Winding core transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a wound-core transformer that is particularly suitable for stacking a plurality of devices.

(Prior Art) As a transformer installed in a building, its capacity tends to increase due to automation of air-conditioning equipment, lighting equipment, other equipment, and installation of various office equipment. High-pressure and large-capacity ones have been used. On the other hand, it is desired to reduce the installation area in order to facilitate the loading of transformers and effectively utilize the floor space of the building. For this reason, conventionally, it is considered that a plurality of small-capacity wound core type transformers are stacked and used instead of installing one large-capacity transformer. This is shown in FIGS. 8 to 11. That is, the wound iron core type transformer 1 is composed of a transformer main body 2 including a wound iron core 2a and a coil 2b, and a support frame 3 supporting the transformer main body 2. The support frame 3 includes a lower frame 4 having a U-shaped cross section, side frames 5 and 5 extending upward from both ends of the lower frame 4, and side frames 5 and 5 thereof.
The upper frame 6 is hung between the upper ends of the upper frame 6 and the nut 8 is screwed between the side frames 5 and 5 and the upper frame 6 to the bolt 7 penetrating the insertion holes 5a and 6a. Are linked together. Fixing seats 9, 9 are attached to both ends of the bottom of the support frame 3.

Therefore, when stacking an upper-stage transformer having a smaller capacity than this transformer 1 on the upper part of this transformer 1, the left and right length dimensions of the upper-stage transformer support frame are the same as those of the transformer 1. Since it is sufficiently smaller than the length of the upper frame 6, the upper transformer can be mounted and fixed on the upper surface of the upper frame 6 as it is.

However, when stacking an upper-stage transformer having the same capacity and the same structure as the transformer 1 on the upper part of the transformer 1, the left and right length dimensions of the support frame of the upper-stage transformer are the same as those of the transformer 1.
Since it is equivalent to that of the above, the fixing seat (corresponding to the fixing seat 9, 9) cannot be placed on the upper surface portion of the upper frame 6 as it is. Therefore, in such a case, as shown in FIG. 11, the connecting members 10 and 10 composed of the horizontal mounting portion 10a and the vertical piece portion 10b attached to the lower surface portion of the mounting portion 10a are attached to the support frame 3 The side frames 5, 5 of the
The fixing seats (corresponding to the fixing seats 9 and 9) of the upper transformer are fixed to 0a and 10a.

(Problems to be Solved by the Invention) In the above-mentioned configuration, when a transformer having the same capacity as the lower transformer 1 is stacked, the side frame of the support frame 3 is used.
Since the connecting members 10, 10 must be fitted and fixed to the upper ends of the 5, 5, respectively, the number of parts increases and the number of assembling steps also increases. Also, when stacking transformers having a smaller capacity than the lower transformer 1, the weight of the upper transformer will be applied to the upper frame 6, and as shown in FIG. Since a remarkably large concentrated stress σ1 is generated at the contact point of the insertion hole 6a with the bolt 7, it is necessary to increase the wall thickness of the upper frame 6 or increase the number of bolts 7, resulting in high cost. There is a problem.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to prevent an increase in cost without increasing the number of parts and the number of assembling steps particularly when stacking a plurality of cores. To provide a transformer.

[Means for Solving the Problem] (Means for Solving the Problems) A wound-core transformer according to the present invention includes a lower frame member fitted to a lower yoke portion of a wound core of a transformer main body, and a lower frame member on both sides of the wound core. A pair of side frame members whose lower end portions are fitted to the leg portions and are connected to both end portions of the lower frame member respectively, and an upper end portion of the pair of side frame members are arranged so as to be arranged from the outside. A rectangular fitting hole that is provided in one of the upper frame member and the side frame member and that fits in the fitting hole in the other. The feature is that the protrusion is provided.

(Operation) According to the wound core type transformer of the present invention, the upper frame member is coupled to the upper ends of the pair of side frame members so as to be addressed from the outside. The length dimension can be arbitrarily set without being restricted by the left and right length dimensions of the bottom frame member, that is, the left and right spacing dimensions of the pair of side frame members, and therefore, another transformer is stacked in particular. In this case, since it can be placed on the upper frame member that is addressed from the outside between the upper ends of the pair of side frame members, no dedicated parts such as a connecting member are required. Further, since the weight of the upper transformer is received by the rectangular fitting hole formed in one of the upper frame member and the side frame member and the rectangular fitting protrusion provided in the other, , The concentrated stress can be reduced.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

In FIG. 1, the transformer main body 11 is constructed by winding windings 11b around the legs of a winding iron core 11a. The frame 12 is the second
A plate material 12b having a cutout 12a as shown in the figure
As shown in FIG. 3, the lower frame member 13 and the pair of side frame members 1 are formed by bending
A plurality of, for example, two fixing seats 15 each having a hole 15a are integrally provided on the lower ends of the side frame members 14, 14 by welding. And the lower frame member
The concave portion of 13 is a fitting portion 13a, the concave portion of the pair of side frame members 14, 14 is a fitting portion 14a, 14a, these fitting portions 13a and 14a,
Winding iron core 1 of transformer main body 11 via an insulating material (not shown) on 14a
The lower yoke of 1a and the left and right legs are fitted together.

Next, referring to FIG. 4 and FIG. 5, a pair of upper frame members
16 and 16 are L-shaped and have a pair of side frame members 14 and 14.
It is arranged so that it is addressed from the outside between the upper ends of
The studs 17, which are inserted into the holes 16a, 16a formed on the side surface,
They are connected to each other by screwing nuts 18, 18 onto 17. The left and right length dimensions of each upper frame member 16 are the left and right length dimensions of the bottom frame member 13, that is, the pair of side frame members 14, 14.
Is set to be larger than the left and right spacing dimension, and both left and right ends of the upper frame member 16 project leftward and rightward from the pair of side frame members 14, 14, respectively. Then, each upper frame member 16
The semicircular rope guides 19 and 19 are formed on the lower edge of the side surface, and a plurality of fixing holes 20 are formed on the upper surface.

Now, the rectangular fitting protrusions 21, 21 are attached to the side surface of each upper frame member 16 by welding, and the upper frame member 16 is applied from the outside between the upper ends of the side frame members 14, 14. At this time, it is fitted into the rectangular fitting hole 22 formed in the upper end of the side frame member 14. A wound core transformer 23 is composed of the transformer main body 11, the lower frame member 13, the pair of side frame members 14, 14 and the pair of upper frame members 16, 16.

Next, when stacking the two transformers 23, 23, as shown in FIG. 7, a pair of upper frame members of the lower transformer 23 are arranged.
Two fixing seats 15 for each of the upper transformers 23 on the upper surface of the 16, 16
Then, a nut (not shown) is screwed onto the fixing bolt 24 inserted through the hole 15a and the outer hole 20.

When stacking a transformer having a smaller capacity than that on the transformer 23, the transformer having a smaller capacity is placed on the upper surface portions of the upper frame members 16 and 16 and the inner hole 20 is provided. Secure with bolts and nuts.

According to the above-mentioned example, the following effects are produced. That is, since the pair of upper frame members 16, 16 are arranged so as to be addressed from the outside between the upper ends of the pair of side frame members 14, 14, the left and right length dimensions of each upper frame member 16 are the bottom. It can be arbitrarily set without being restricted by the left and right length dimensions of the frame member 13, that is, the left and right spacing dimensions of the pair of side frame members 14, 14. Therefore, it is possible to stack the upper transformers 23 on the upper surface portions of the upper frame members 16 and 16, and it is possible to prevent an increase in the number of parts and the number of assembling steps unlike the conventional case in which the dedicated connecting member 10 is required. In this case, the weight of the upper transformer 23 is received at the lower contact portion between the fitting protrusion 21 of the upper frame member 16 and the fitting hole 22 of the side frame member 14 (see FIG. 6). ), Since these are rectangular, the lower contact portion becomes linear and the concentrated stress σ2 becomes extremely small, so the thickness of the side frame member 14 and the upper frame member 16 is increased. No need, and the mating protrusion 21
Also, it is not necessary to increase the number of fitting holes 22, and it is possible to prevent the cost from increasing.

By the way, in the case where the two transformers 23, 23 are hoisted in a stacked state, the total weight is, contrary to FIG. 6, the fitting projection 21 of the upper frame member 16 and the side frame. The upper contact portion of the member 14 with the fitting hole 22 receives the upper contact portion. However, since they are also not rectangular, there is an advantage that the upper contact portion is linear and the concentrated stress is small.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, the upper frame member 16 is provided with the fitting protrusion 21 and the side frame member 14 is formed with the fitting hole 22. However, the side frame member 14 may be provided with a fitting protrusion to form the fitting hole in the upper frame member 16, and the pair of upper frame members 1 may be provided.
6, 16 are arranged between the upper end portions of the pair of side frame members 14, 14, but instead of this, the upper frame member having a U-shaped cross section may be straddled from above the pair of side frame members 14, 14. May be installed in the
Various modifications are possible without departing from the gist.

[Advantages of the Invention] In the wound core type transformer of the present invention, the upper frame member is arranged so as to extend from the outside between the upper ends of the pair of side frame members fitted with the wound core of the transformer body. However, since a rectangular fitting hole is formed in one of the upper frame member and the side frame member and a rectangular fitting protrusion that fits in the fitting hole is provided in the other, It is not necessary to increase the number of parts and the number of assembling steps when stacking a plurality of them, and it is not necessary to increase the thickness of the side frame member and the upper frame member, and it is possible to prevent an increase in cost. Has the effect.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is an overall perspective view, FIG. 2 is a developed view of a frame body, FIG. 3 is a perspective view of the same appearance, and FIG. The figure is a perspective view of the upper frame member, FIG. 5 is a cross-sectional view of the main part, and FIG. 6 is a view of FIG.
FIG. 7 is a front view in a stacked state. Then, FIGS. 8 to 11 show a conventional example, and FIGS.
FIG. 10 is a view corresponding to FIG. 1, FIG. 5 and FIG. 6, respectively, and FIG. 11 is a view corresponding to FIG. In the drawing, 11 is a transformer body, 11a is a winding core, 13 is a lower frame member, 13a is a fitting portion, 14 is a side frame member, 14a is a fitting portion, 16 is an upper frame member, and 21 is a fitting protrusion. Reference numeral 22 denotes a fitting hole.

Claims (1)

[Scope of utility model registration request] 1. A transformer main body, a lower frame member fitted to a lower iron portion of a winding core of the transformer main body, and lower ends of the lower frame member fitted to legs on both sides of the winding iron core. A pair of side frame members respectively coupled to both ends of the pair of side frame members, and an upper frame member arranged between the upper end portions of the pair of side frame members so as to extend from the outside. A winding iron core characterized in that a rectangular fitting hole is formed in one of the member and the side frame member, and a rectangular fitting protrusion that fits in the fitting hole is provided in the other. Transformer.