JPS6316245Y2

JPS6316245Y2 -

Info

Publication number: JPS6316245Y2
Application number: JP6138382U
Authority: JP
Priority date: 1982-04-26
Filing date: 1982-04-26
Publication date: 1988-05-10
Also published as: JPS58162705U

Description

[Detailed explanation of the idea]

この考案は騒音を抑制した閉鎖配電盤に関す
る。しや断器、変圧器等振動を発する電気機器を収
納した閉鎖配電盤にあつては、前記電気機器の振
動が閉鎖配電盤の底板、側面板、天井板、扉等に
伝わつて騒音を発生するため好ましいものではな
い。この考案は以上の点に留意し閉鎖配電盤の底
板、側面板、天井板、扉等にアクリル系高分子材
料から成る粘弾性体を貼着したことを特徴とす
る。以下この考案の一実施例を第１図乃至第５図に
ついて説明する。第１図において１は閉鎖配電
盤、２は内部に収納した振動を発する電気機器、
３は扉である。第２図、第３図はそれぞれ第１図のＡ−A′線、
Ｂ−B′線で切断した図であり、４は底板、５は
両側面板、６は天井板である。而して本考案は前記底板４、両側面板５、天井
板６等の内面に粘弾性体を貼着したものである。
具体的には第４図で示すように底板４等の内面に
アクリル系高分子材料からなる粘弾性体７を貼り
更にその上にアルミニユーム板等の拘束板８を貼
り合せる。而して上記構成によれば静止状態での粘弾性体
７は長い鎖状の分子同志が不規則にからみあつて
いるが、底板４の振動に伴なう変形によつて長い
鎖状の分子が延ばされたり滑つたりするようにな
る。つまり粘弾性体７が変形を受け内部抵抗を生
じ、これが熱エネルギーに変換せしめられること
によつて振動を減衰する作用をなすものである。従つて振動を熱エネルギーにして吸収するた
め、振動や固体音がなくなり、騒音を抑制するこ
とができるようになる。本考案の作用効果を具体的数値に基いて説明す
る。すなわち第５図に示す如き盤巾が800mmで、奥
行800mm、1400mm、800mmの各閉鎖配電盤１を６基
列盤構成し、中央の盤内部に400KVAの変圧器２
を収納し、各変圧器１の直下（底板内面上）に粘
弾性体７と拘束板８を貼り合せたものを貼着しな
いときの、各測定点Ａ〜Ｆにおける騒音は次の通
りであつた。なお、各測定点Ａ〜Ｆは側面板５より1000mm及
び地上より1000mmの高さである。 This invention relates to a closed switchboard that suppresses noise. In the case of closed switchboards that house electrical equipment that generates vibrations, such as disconnectors, transformers, etc., the vibrations of the electrical equipment are transmitted to the bottom plate, side panels, ceiling panels, doors, etc. of the closed switchboard, generating noise. Not desirable. Taking the above points into consideration, this invention is characterized in that a viscoelastic body made of acrylic polymer material is attached to the bottom plate, side plate, ceiling plate, door, etc. of the closed switchboard. An embodiment of this invention will be described below with reference to FIGS. 1 to 5. In Figure 1, 1 is a closed switchboard, 2 is an electrical device that generates vibrations housed inside,
3 is the door. Figures 2 and 3 are line A-A' in Figure 1, respectively.
It is a diagram cut along the line B-B', and 4 is a bottom plate, 5 is both side plates, and 6 is a ceiling plate. Accordingly, in the present invention, a viscoelastic material is attached to the inner surfaces of the bottom plate 4, both side plates 5, ceiling plate 6, etc.
Specifically, as shown in FIG. 4, a viscoelastic body 7 made of an acrylic polymer material is attached to the inner surface of the bottom plate 4, etc., and a restraint plate 8, such as an aluminum plate, is bonded thereon. According to the above configuration, the viscoelastic body 7 in a stationary state consists of long chain molecules that are irregularly entangled with each other, but due to the deformation caused by the vibration of the bottom plate 4, the long chain molecules becomes elongated or slips. In other words, the viscoelastic body 7 is deformed and generates internal resistance, which is converted into thermal energy, thereby acting to damp vibrations. Therefore, since vibrations are converted into thermal energy and absorbed, vibrations and solid sounds are eliminated, making it possible to suppress noise. The effects of the present invention will be explained based on specific numerical values. In other words, as shown in Fig. 5, the panel width is 800 mm, and the depth is 800 mm, 1400 mm, and 800 mm, each consisting of 6 closed switchboards 1, with a 400 KVA transformer 2 installed inside the central panel.
The noise at each measurement point A to F when the viscoelastic body 7 and restraining plate 8 are not attached directly below each transformer 1 (on the inner surface of the bottom plate) is as follows. Ta. Note that each measurement point A to F is at a height of 1000 mm from the side plate 5 and 1000 mm from the ground.

【表】しかし粘弾性体７と拘束板８を貼り合せたもの
（400mm×600mm）を貼着した場合には前記各値は
次の通りとなつた。[Table] However, when a combination of the viscoelastic body 7 and the restraining plate 8 (400 mm x 600 mm) was attached, the above values were as follows.

【表】これらの結果からすれば本考案によるときは平
均で７ホン騒音を低減できることが判明する。なお、図では粘弾性体を底板、側面板等の内面
に貼着した場合を説明したが、内面に限らず外面
に貼着しても同等の効果が得られる。以上のように本考案によるときは単に粘弾性体
と拘束板を底板、側面板等に貼着することにより
振動に伴なう騒音を抑制できる効果を奏する。[Table] From these results, it is clear that the present invention can reduce the noise by 7 phons on average. In addition, although the case where the viscoelastic body is attached to the inner surface of the bottom plate, side plate, etc. is explained in the figure, the same effect can be obtained not only by attaching it to the inner surface but also to the outer surface. As described above, the present invention has the effect of suppressing noise caused by vibration simply by attaching the viscoelastic body and the restraining plate to the bottom plate, side plate, etc.

[Brief explanation of the drawing]

図は本考案の一実施例を示し、第１図は閉鎖配
電盤の側面図、第２図、第３図はそれぞれ第１図
のＡ−A′線、Ｂ−B′線で切断した断面図、第４
図は本考案の要部を示す断面図、第５図は実験結
果を説明するための平面図である。１……閉鎖配電盤、２……電気機器、４……底
板、５……側面板、７……粘弾性体、８……拘束
板。 The figures show one embodiment of the present invention, in which Figure 1 is a side view of a closed switchboard, and Figures 2 and 3 are cross-sectional views taken along line A-A' and line B-B' in Figure 1, respectively. , 4th
The figure is a sectional view showing the main part of the present invention, and FIG. 5 is a plan view for explaining the experimental results. 1... Closed switchboard, 2... Electric equipment, 4... Bottom plate, 5... Side plate, 7... Viscoelastic body, 8... Restraint plate.

Claims

[Scope of utility model registration request]

In a closed power distribution board that houses vibration-generating electrical equipment such as a breaker, a transformer, etc., a viscoelastic body made of an acrylic polymer material is pasted on the bottom plate, side plate, etc. of the closed power distribution board, and the viscoelastic body is A closed power distribution board constructed by pasting a restraining plate made of aluminum or other material on top.