JP2016105445A - Waterproof structure for control panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a control panel from a water droplet adhering to cable in a structure where the cable is passed to a side part of a housing.SOLUTION: A waterproof structure of a control panel includes: a housing 24 for housing a control apparatus 30; and a first grommet 31 and a second grommet 32 (gradient provision means) for giving rising gradient within an interval from a side part 25 of the housing 24 to the control apparatus 30 with respect to cable 40 to be connected to the control apparatus 30 after being passed to the side part 25 of the housing 24.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a waterproof structure for a control panel.

  In a control terminal, a structure is disclosed in which a feeder line connected to a terminal block is passed through a casing using a grommet (see Patent Document 1).

JP 2001-35670 A

  As disclosed in Patent Document 1 described above, conventionally, a grommet is used to pass a cable through a casing of a control panel. If the grommet is provided on the bottom surface of the housing and the cable is passed through the bottom surface, the water droplet will not enter the housing through the cable even in an environment where water droplets adhere to the cable outside the housing. .

  However, when a structure is adopted in which the cable is passed through the side of the casing of the control panel, water droplets attached to the cable may enter the casing through the cable, and it is difficult to prevent this. Met.

  In view of the above fact, an object of the present invention is to protect a control panel from water droplets adhering to a cable in a structure in which a cable is passed through a side portion of a housing.

  The waterproof structure of the control panel according to claim 1 is configured such that a housing for housing a control device and a cable that is passed through a side portion of the housing and connected to the control device are connected from the side portion to the control device. And a gradient imparting means for imparting an ascending gradient.

  In this waterproof structure of the control panel, the gradient imparting means imparts an ascending slope between the side of the housing and the control device with respect to the cable passed through the side of the housing and connected to the control device. Therefore, even if water droplets adhere to the cable outside the housing, the water droplet can be prevented from entering the control device inside the housing through the cable. For this reason, in a structure in which the cable is passed through the side of the housing, the control panel can be protected from water droplets adhering to the cable.

  According to a second aspect of the present invention, in the waterproof structure of the control panel according to the first aspect, as the gradient imparting means, a side wall portion provided on the side portion and having a first through hole formed therein, and the inside of the casing. A partition wall provided between the side wall portion and the control device, wherein the second through hole is formed to be offset above the first through hole in the vertical direction of the casing, and the partition wall is attached to the first through hole. A first grommet through which the cable is passed; and a second grommet attached to the second through hole and through which the cable is passed.

  In the waterproof structure of the control panel, the second grommet attached to the second through hole of the partition wall in the housing is offset upward in the vertical direction of the housing from the first grommet attached to the first through hole of the side wall. Has been. Therefore, when a cable is passed through the first grommet and the second grommet, an upward gradient is imparted to the cable between the first grommet and the second grommet, in other words, between the side wall portion and the partition wall. For this reason, it is possible to easily prevent water droplets attached to the cable outside the housing from entering the control device inside the housing through the cable. In the waterproof structure of the control panel, the first grommet and the second grommet can have the same configuration.

  According to a third aspect of the present invention, in the waterproof structure of the control panel according to the first aspect, as the gradient imparting means, a side wall portion provided in the side portion and having a first through hole formed therein, and the inside of the casing. A partition wall provided between the side wall portion and the control device, the second through hole being formed at the same height as the first through hole in the vertical direction of the housing, and the cable attached to the first through hole A first grommet through which the cable passes, and a second grommet that is attached to the second through-hole, the opening is formed to be offset above the opening of the first grommet in the vertical direction of the casing, and the second cable through which the cable passes. And a grommet.

  In the waterproof structure of the control panel, the first grommet attached to the first through hole in the side wall portion and the second grommet attached to the second through hole of the partition wall in the casing are at the same height in the vertical direction of the casing. It is attached to the position. On the other hand, the opening of the second grommet is offset upward from the opening of the first grommet. Therefore, when a cable is passed through the first grommet and the second grommet, the cable is supported by the opening of the first grommet and the opening of the second grommet, respectively. Thereby, an ascending slope is given to the cable between the first grommet and the second grommet, in other words, between the side wall portion and the partition wall. For this reason, even when the first through hole in the side wall portion and the second through hole in the partition wall are formed at the same height in the vertical direction of the casing, the first grommet and the second grommet can Water droplets attached to the cable can easily be prevented from entering the control device inside the housing through the cable.

  According to a fourth aspect of the present invention, in the waterproof structure of the control panel according to any one of the first to third aspects, water is drained below the casing in a vertical direction of the casing of the gradient applying means. A bottom having a hole is provided.

  In this waterproof structure of the control panel, a bottom portion having a drain hole is provided below the gradient imparting means in the casing, so that water that has fallen from the cable to the bottom portion is discharged from the drain hole. For this reason, it is possible to prevent water from remaining in the housing.

  As described above, according to the waterproof structure of the control panel according to the present invention, it is possible to protect the control panel from water droplets adhering to the cable in the structure in which the cable is passed through the side portion of the housing. Effect.

  According to the waterproof structure of the control panel according to claim 2, it is possible to easily prevent water droplets attached to a cable outside the casing from entering the control device inside the casing through the cable. An effect is obtained.

  According to the waterproof structure of the control panel according to claim 3, even when the first through hole of the side wall and the second through hole of the partition wall are formed at the same height position in the vertical direction of the housing, By the 1 grommet and the 2nd grommet, the outstanding effect that the water droplet adhering to the cable outside a housing | casing can prevent easily entering a control apparatus inside a housing | casing along a cable is acquired.

  According to the waterproof structure of the control panel according to the fourth aspect, an excellent effect is obtained that water can be prevented from staying in the casing.

It is a perspective view which shows the attachment state of the control panel in an opening / closing apparatus. It is an exploded view which shows a control panel. It is a principal part expansion disassembled perspective view which shows the control panel arrange | positioned so that a 1st grommet and a 2nd grommet may be located in a line with a perpendicular direction. (A) is a 4A-4A arrow sectional view in Drawing 4 showing typically the state where the cable was passed through the 1st grommet and the 2nd grommet offset above the 1st grommet in the up-and-down direction of the case It is. (B) is a state in which a cable is passed through a first grommet and a second grommet provided at the same height, and the cable is convexly curved downward between the first grommet and the second grommet. It is sectional drawing which shows this typically. (C) is provided at the same height, and the cable passes through the first grommet and the second grommet formed by offsetting the opening upward from the opening of the first grommet in the vertical direction of the housing. It is sectional drawing which shows typically the state performed. (A) It is an enlarged front view which shows the 1st grommet in which the opening part was arrange | positioned in the center. (B) It is an enlarged front view which shows the 1st grommet in which the opening part was offset from the center. It is a principal part expansion disassembled perspective view which shows the control panel arrange | positioned so that a 1st grommet and a 2nd grommet may be located in a line with a horizontal direction. (A) is a 7A-7A arrow section in Drawing 6 showing the state where the cable was passed through the 1st grommet and the 2nd grommet offset above the 1st grommet in the up-and-down direction of the case. FIG. (B) is a state in which a cable is passed through a first grommet and a second grommet provided at the same height, and the cable is convexly curved downward between the first grommet and the second grommet. It is sectional drawing which shows this typically. (C) is provided at the same height, and the cable passes through the first grommet and the second grommet formed by offsetting the opening upward from the opening of the first grommet in the vertical direction of the housing. It is sectional drawing which shows typically the state performed.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  In FIG. 1, a waterproof structure S for a control panel according to the present embodiment is used for, for example, an electric switchgear 10. The opening / closing device 10 includes a shutter curtain 14, a winding shaft (not shown) that winds up the shutter curtain 14, and a motor (not shown) that rotationally drives the winding shaft. The winding shaft is supported at both ends by a pair of brackets 16 and 18. The control panel 12 is fixed to a side cover 20 provided to overlap the bracket 18 by using, for example, an L-shaped attachment plate 22.

  Here, assuming that the axial direction of the winding shaft is the arrow X direction, the horizontal direction orthogonal to the arrow X direction is the arrow Y direction, and the vertical direction is the arrow Z direction, the control panel 12 has the shutter curtain 14 in the arrow Y direction. And are arranged so that the longitudinal direction is parallel to the arrow X direction. The winding shaft, the control panel 12 and the like are usually covered with a cover (not shown).

  The waterproof structure S of the control panel includes a casing 24 and gradient imparting means (side wall part 26, partition wall 28, first grommet 31 and second grommet 32).

  In FIG. 2, the casing 24 is a member that accommodates a control device 30 such as an electronic circuit board, and includes a main body 34 and a cover 36. A pair of side walls 26 and partition walls 28 are provided at both ends in the longitudinal direction of the main body 34. The control device 30 is attached between both the partition walls 28 in the main body 34. The height dimension (arrow Z direction) of the housing 24 is set larger than the width dimension (arrow Y direction). In other words, the control panel 12 is arranged vertically (FIG. 1).

  The gradient imparting means imparts an upward gradient from the side portion 25 to the control device 30 with respect to the cable that is passed through the side portion 25 of the housing 24 and connected to the control device. The present embodiment includes a side wall portion 26, a partition wall 28, a first grommet 31, and a second grommet 32 as gradient applying means. In FIG. 3, the side wall part 26 is provided in the side part 25 of the housing | casing 24, for example, the two 1st through-holes 41 and 51 are formed in two places along with the perpendicular direction (arrow Z direction).

  The partition wall 28 is provided between the side wall portion 26 and the control device 30 in the housing 24. For example, two second through holes 42 and 52 are formed in the partition wall 28 so as to be offset above the first through holes 41 and 51 in the vertical direction of the housing (FIG. 4A). The vertical direction of the housing is, for example, the vertical direction (arrow Z direction). The 2nd through-holes 42 and 52 are formed in two places along with the perpendicular direction (arrow Z direction) like the 1st through-holes 41 and 51. FIG. The center distance L1 between the first through holes 41 and 51 is equal to the center distance L2 between the second through holes 42 and 52. The offset is set between the upper first through hole 41 and the upper second through hole 42, and is set between the lower first through hole 51 and the lower second through hole 52. Has been. Further, the offset amount is appropriately set in consideration of the flexibility of the cable 40 and the degree of the upward gradient applied to the cable 40.

  Bending portions 28A and 28C are provided at both ends of the partition wall 28 in the arrow Z direction, and bending portions 28B and 28D are provided at both ends of the partition wall 28 in the arrow Y direction. The partition wall 28 is fixed to the side wall portion 44 of the main body 34 at the bent portion 28 </ b> D using, for example, two screws 38. A notch 28E for avoiding interference with a tool (not shown) when the screw 38 is fastened is formed in the bent portion 28B facing the bent portion 28D.

  The first grommet 31 is attached to the first through holes 41 and 51. The second grommet 32 is attached to the second through holes 42 and 52. A cable 40 is passed through the first grommet 31 and the second grommet 32. As shown in FIG. 5A, the first grommet 31 is a member in which an elastic film portion 47 such as rubber is provided inside the annular portion 46. The annular portion 46 is a portion that is fitted into the first through holes 41 and 51. An opening 48 is formed at the center of the elastic film portion 47. A plurality of slits 49 are formed in the elastic film portion 47 radially from the opening 48. The opening 48 is a part where the slits 49 gather and may be closed in a natural state. When the cable 40 is passed through the first grommet 31, the elastic film portion 47 divided by the slit 49 is elastically deformed. This also allows the cable 40 to be elastically supported by the elastic membrane portion 47 while reducing the gap between the cable 40 and the first grommet 31. The configuration of the second grommet 32 is the same as that of the first grommet 31.

  The gradient applying means is not limited to the above. For example, as shown in FIGS. 4B and 4C, the second through holes 42 and 52 of the partition wall 28 are located at the same height as the first through holes 41 and 51 in the housing vertical direction (arrow Z direction). It may be formed. In the example shown in FIG. 4B, the cable 40 is passed through the first grommet 31 and the second grommet 32 provided at the same height, and the cable 40 is connected to the first grommet 31 and the second grommet 32. Is curved convexly downward. Due to this curvature, the cable 40 is given an upward slope.

  In the example shown in FIG. 4C, the opening 48 of the second grommet 32 is formed so as to be offset above the opening 48 of the first grommet 31 in the vertical direction of the casing (in the arrow Z direction). . Since the first grommet 31 and the second grommet 32 have the same configuration, the first grommet 31 will be described as an example in FIG. 5B. In the first grommet 31, the opening 48 is offset from the center of the annular portion 46 and is eccentric. In the first grommet 31, the opening 48 is disposed below the vertical direction (arrow Z direction), and in the second grommet 32, the opening 48 is also disposed on the upper side, whereby the first grommet 31 and the second grommet 31. An upward slope can be given to the cable 40 passed through the grommet 32.

  In addition, even if the grommet having the configuration shown in FIG. 5A and the grommet having the configuration shown in FIG. An ascending slope can be given. The offset direction of the first grommet 31 and the second grommet 32 is not limited to the vertical direction (arrow Z direction), and may be a direction inclined with respect to the vertical direction. Any configuration can be used as long as the cable 40 can be given an upward slope.

  In FIG. 2, a bottom 50 having a drain hole 54 is provided below the casing 24 in the casing vertical direction (arrow Z direction) of the gradient applying means. Specifically, the bottom 50 is provided on the cover 36 of the housing 24, for example. In the longitudinal direction of the housing 24 (the direction of the arrow X), the water drain hole 54 is located between the side wall portion 26 and the partition wall 28. The number and size of the drain holes 54 are arbitrary. In order to make it easy for water to collect in the drain hole 54, an inclination may be provided around the drain hole 54 in the bottom 50.

  In addition, as shown in FIG. 6, the control panel 12 may be arranged horizontally. At this time, the height dimension (arrow Z direction) of the housing 24 is smaller than the width dimension (arrow Y direction). The first grommets 31 are arranged side by side in the horizontal direction (arrow Y direction) on the side wall portion 26. The second grommets 32 are arranged in the horizontal direction (arrow Y direction) in the partition wall 28. A bottom 50 having a drain hole 54 is provided in the main body 34 of the housing 24. The partition wall 28 is fixed to the bottom portion 50 using screws 38.

  7A to 7C are the same as the examples shown in FIGS. 4A to 4C, and the same parts are not shown in the drawings. The same reference numerals are given and description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 4 (A) to 4 (C), in the waterproof structure S of the control panel according to the present embodiment, the cable 40 that is passed through the side portion 25 of the housing 24 and connected to the control device 30 by the gradient applying means. On the other hand, an upward gradient is given from the side 25 of the housing 24 to the control device 30.

  Specifically, in the example shown in FIG. 4A, the second grommet 32 attached to the second through holes 42 and 52 of the partition wall 28 in the housing 24 is the first through hole 41 of the side wall portion 26. , 51 is offset upward in the vertical direction of the casing (in the direction of arrow Z) from the first grommet 31 attached to. Therefore, when the cable 40 is passed through the first grommet 31 and the second grommet 32, the cable 40 is connected between the first grommet 31 and the second grommet 32, in other words, between the side wall portion 26 and the partition wall 28. An ascending slope is given. Therefore, even if water droplets (not shown) adhere to the cable 40 outside the housing 24, the water droplets can be prevented from entering the control device 30 inside the housing 24 through the cable 40.

  In the example shown in FIG. 4B, the first grommet 31 attached to the first through holes 41 and 51 of the side wall portion 26 and the second through holes 42 and 52 of the partition wall 28 in the housing 24 are attached. The second grommets 32 are attached to the same height in the vertical direction of the casing (in the direction of arrow Z). A cable 40 is passed through the first grommet 31 and the second grommet 32, and the cable 40 is curved downward and convex between the first grommet 31 and the second grommet 32. Due to this bending, an upward slope is given to the cable 40.

  In the example shown in FIG. 4C, the first grommet 31 and the second grommet 32 are attached at the same height in the vertical direction of the casing (the arrow Z direction), as in the example of FIG. 4B. It has been. On the other hand, the opening 48 of the second grommet 32 is offset above the opening 48 of the first grommet 31. Accordingly, when the cable 40 is passed through the first grommet 31 and the second grommet 32, the cable 40 is supported by the opening 48 of the first grommet 31 and the opening 48 of the second grommet 32, respectively. As a result, an upward slope is imparted to the cable 40 between the first grommet 31 and the second grommet 32, in other words, between the side wall portion 26 and the partition wall 28.

  In the example shown in FIG. 4B and FIG. 4C, the first through holes 41 and 51 of the side wall portion 26 and the second through holes 42 and 52 of the partition wall 28 are in the vertical direction of the casing (the direction of the arrow Z). Even when they are formed at the same height, the water droplets attached to the cable 40 outside the housing 24 can be easily prevented from entering the control device 30 inside the housing 24 through the cable 40. .

  As described above, according to the present embodiment, the control panel 12 can be protected from water droplets adhering to the cable 40 in the structure in which the cable 40 is passed through the side portion 25 of the housing 24. In addition, since the bottom 50 having the drain hole 54 is provided below the gradient imparting means in the casing 24, the water that has fallen from the cable 40 to the bottom is discharged from the drain hole 54. For this reason, it is possible to prevent water from remaining in the housing 24.

  Further, as shown in FIGS. 5 (A) and 5 (B), since the first grommet 31 and the second grommet 32 have the elastic film portion 47, it is only necessary to pass one cable 40. And a plurality of cables 40 can be passed.

  In addition, in the examples shown in FIGS. 6, 7 </ b> A to 7 </ b> C, water droplets attached to the cable 40 outside the housing 24 are similar to the examples shown in FIGS. The cable 40 can be prevented from entering the control device 30 inside the housing 24.

24 Case 25 Side part 26 Side wall part (gradient imparting means)
28 Bulkhead (gradient imparting means)
30 control device 31 first grommet (gradient imparting means)
32 Second grommet (gradient imparting means)
40 Cable 41 First through-hole 42 Second through-hole 48 Opening 50 Bottom 51 First through-hole 52 Second through-hole 54 Water drainage hole S Control panel waterproof structure Z Arrow (up-down direction of housing)

Claims (4)

A housing that houses the control device;
Gradient imparting means for imparting an ascending slope from the side part to the control device with respect to the cable that is passed through the side portion of the housing and connected to the control device;
Control panel waterproof structure. As the gradient applying means,
A side wall provided on the side and formed with a first through hole;
A partition wall provided between the side wall portion and the control device in the housing, wherein the second through hole is formed by being offset above the first through hole in the vertical direction of the housing;
A first grommet attached to the first through hole and through which the cable is passed;
A second grommet attached to the second through hole and through which the cable is passed;
The waterproof structure of the control panel according to claim 1. As the gradient applying means,
A side wall provided on the side and formed with a first through hole;
A partition wall provided between the side wall portion in the housing and the control device, and a second through hole formed at the same height as the first through hole in the vertical direction of the housing;
A first grommet attached to the first through hole and through which the cable is passed;
A second grommet that is attached to the second through-hole and has an opening that is offset above the opening of the first grommet in the vertical direction of the housing and through which the cable passes;
The waterproof structure of the control panel according to claim 1.   The waterproof structure of the control panel according to any one of claims 1 to 3, wherein a bottom portion having a drain hole is provided below the casing in the vertical direction of the casing. .

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