JP3022158B2 - Wiring mounting equipment for low-temperature storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring mounting device for a low-temperature warehouse such as a low-temperature showcase.

[0002]

2. Description of the Related Art Conventionally, in a low-temperature showcase of this kind, for example, Japanese Patent Publication No. 2-28782 (F25D)
As shown in 11/00), the cool air exchanged with the cooler is circulated in the refrigerator by a blower to cool the refrigerator to a predetermined temperature, and a fluorescent light for illuminating the refrigerator. Various electric components such as a lamp and a heater for preventing dew condensation on the wall surface are also attached.

[0003]

By the way, a coupler is conventionally provided in the middle of an electric circuit to the above-mentioned electric components, for example, a fluorescent lamp, and a wiring is provided by electrically connecting one of the couplers to the other. Although the work is being performed, since the inside of the refrigerator is cooled to a low temperature as described above, dew condensation occurs on the lead wire surface of the electric circuit and on the fixed surface on which these lead wires and the like are installed.

If such dew flows along the lead wire into the coupler, or if the coupler itself sinks into the dew water on the fixed surface, the terminals in the coupler are short-circuited, And the fixed surface, which is a non-charged portion, is short-circuited, and a ground fault occurs. Therefore, conventionally, the entire coupler is inserted into a plastic bag, and the lead wire inlet to the bag is disposed below to prevent the dew condensation water from flowing into the coupler, and the wiring work is extremely complicated. Had become.

When an iron core type ballast is used as the ballast of the fluorescent lamp, the frequency of the power source (50 Hz / 60 Hz) is used.
It is necessary to switch the power supply circuit to the ballast according to Z), but in the past, this switching part was installed near the electrical box in the machine room of the low-temperature showcase. Therefore, the switching operation has to be performed in a machine room where equipment and wiring are complicated, and the switching operation has to be performed using a tool, so that the workability is extremely complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem, and it is possible to prevent the occurrence of a failure due to dew condensation water and improve the wiring workability. An object of the present invention is to provide a wiring mounting device for a warehouse.

[0007]

According to a first aspect of the present invention, there is provided a low-temperature wiring installation device for a fluorescent lamp mounted on a lower surface of a reflector for illuminating a storage room and a fluorescent lamp mounted on an upper surface of the reflector. A ballast, a coupler provided in the middle of an electric circuit composed of a fluorescent lamp and a ballast, a mounting plate provided upright on the upper surface of the reflector, and a mounting at a position spaced above the reflector. And an engagement hole formed in the plate, an engagement arm is formed in one of the couplers, and this engagement arm is engaged with the engagement hole to attach one of the couplers to a mounting plate. is there.

According to a second aspect of the present invention, there is provided a low-temperature warehouse wiring mounting apparatus, comprising: a fluorescent lamp mounted on a lower surface of a reflector for illuminating a storage room; and an iron core type ballast mounted on an upper surface of the reflector. And a power frequency switching coupler provided in the middle of the power supply circuit for the ballast, a through hole formed in the reflector, and a detachably attached to the reflector so as to close the through hole from below. And a mounting wall that rises from the upper surface of the closing plate and extends above the reflecting plate from the through hole, and a position where the closing plate is attached to the reflecting plate and separated from above the reflecting plate. An engaging portion formed on a mounting wall, wherein an engaging arm is formed on one of the couplers, and the engaging arm is engaged with the engaging portion to attach one of the couplers to the mounting wall. It is.

According to the present invention, one of the couplers is a reflector.
Attach to the mounting plate at a position separated upwards, and
And ballast electrical circuit leads hang down from coupler
Will go down. Therefore, dew condensation on the coupler itself is difficult.
As well as dew condensation adhering to the surface of the lead wires and the top of the reflector
Flows into the coupler along the lead wire, or
It is no longer immersed in dew condensation on the firing plate,
Without wrapping the coupler in a neal bag,
Generation can be avoided beforehand.

In particular, one of the couplers has an engagement arm.
This engagement arm is engaged with the engagement hole of the mounting plate to
Since one of them was attached, the work of attaching the coupler
And significantly improve wiring workability of low-temperature storage
be able to.

Further , a mounting plate is provided on the upper surface of the reflecting plate.
Therefore, perform coupler connection work near fluorescent lights and ballasts.
And the wiring workability is further improved.
In addition, each coupler and mounting plate
Will be heated, so the formation of condensation on them
It is better prevented or suppressed.

In addition, according to the second aspect of the present invention , in addition to the above, the connection of the coupler is switched while the closing plate is removed from the reflector and the mounting wall is pulled out below the reflector, so that the power of the ballast can be changed. Since the frequency can be switched, the switching workability can be significantly improved as compared with the related art.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a low-temperature showcase 1 as an embodiment of a low-temperature cabinet to which the present invention is applied, FIG. 2 is a vertical side view of the low-temperature showcase 1, and FIG. . In each of the drawings, a low-temperature showcase 1 is used for displaying and preserving ice cream and the like in a convenience store or the like, and is constituted by a horizontally long rectangular heat-insulating box 2 opened upward. The heat-insulating box 2 includes a metal outer box 3 and a metal inner box 6 incorporated in the outer box 3 at intervals.
And a foam insulation material 7 such as polyurethane foam filled between the boxes 3 and 6 by an in-situ foaming method.

Duct plates 8 and 9 are attached to the inside of the front and rear surfaces of the inner box 6 at intervals.
A bottom plate 11 is detachably installed between the lower ends of the inner box 6, thereby forming a series of ducts 12 rising up and down from the bottom inside the inner box 6.
A storage room 22 is defined inside the bottom plate 9 and 9. on the other hand,
The bottom wall 13 of the heat insulating box 2 has a stepped shape having a lower portion 13A at a front portion and a higher portion 13B at a rear portion, and the bottom plate 11 is located above the higher portion 13B.

A drain pan 14 is provided on the upper surface of the lower portion 13A, and a drain hole 16 is formed at the lowest position of the drain pan 14 and communicates with the outside of the heat insulating box 2 and below. On the drain pan 14, the duct 12
A horizontally long plate-fin type cooler 17 is disposed inside the fan case 18 and a fan case 18 provided on the front side of the cooler 17.
Inside, a blower 19 composed of a suction type propeller fan is mounted.

Higher portion 13B on the rear side of the cooler 17
The stepped portion of the lower portion 13A has an inclined surface 13C such that the upper portion is separated from the cooler 17. The upper end of the duct plate 9 is a discharge port 9A, the upper end of the duct plate 8 is a suction port 8A, and wind direction plates 21, 21 which are curved inward are attached to the discharge port 9A at predetermined intervals.

On the other hand, on both sides of the opening of the heat insulating box 2, side plates 41, 41 made of a thick plate of transparent acrylic resin are provided upright. The side plates 41, 41 have a substantially mountain shape that is inclined such that the upper portions of the front and rear sides 41A, 41B are close to each other, and a stainless steel top plate 42 is also provided between the upper end portions thereof. It is screwed from the side via 43.

The top plate 42 has a mountain-shaped cross section along the shape of the upper portions of the side plates 41, 41, and the lower surface thereof also serves as a fixing surface via front and rear stainless steel upper support plates 44, 44. A reflection plate 46 made of stainless steel is attached. The upper support plates 44, 44 have a predetermined distance from the lower surface of the top plate 42, and the front ends thereof are located on the front and rear sides 4 of the side plate 41.
It is inclined downward and downward substantially along the inclination of 1A and 41B. On the lower surface of the reflection plate 46, horizontally long fluorescent lamps 51, 51 and glow starters 50, 50 are housed and arranged, and on the upper surface, iron core type stabilizers 52, 52 are arranged. In FIG. 3, reference numerals 55 and 55 denote holes for passing lead wires 93 described later.

On the other hand, rails 63, 63 are attached to the front and rear opening edges of the heat-insulating box 2 across the left and right. Between the rails 63, 63 and the top plate 42, the storage room 22 of the low-temperature showcase 1 is Open in the front-rear direction (opening 64, 6
4) Yes. With this configuration, the upper edges of the front and rear openings 64, 64 of the storage room 22 of the low-temperature showcase 1 are located deeper than the lower edge and open diagonally upward, and the rails 63, 63 are located below these openings 64, 64. The front and rear side surfaces of the upper support plates 44, 44 and the reflection plate 46 are located at the edges.
Will be located at the upper edge.

On the rail 63, a plurality of sliding doors 73 made of, for example, a transparent acrylic resin plate or a transparent glass are slidably mounted and supported. In this case, in the embodiment, eight doors 7 are arranged in front and rear of each of the two doors.
3 is supported, the upper part of the door 73 supported inside is supported by the front and rear side surfaces of the reflection plate 46, and the upper part of the door 73 supported outside is supported by the upper support plate 44.

At the front and rear ends of the heat insulating box 2, kick plates 26, 26 having a large number of through holes 24 are attached. The kick plates 26, 26 are located between the kick plates 26, 26. A machine room 27 is formed below. A compressor (not shown), which constitutes a known refrigeration cycle together with the cooler 17, a condenser 29, a blower 31 for the condenser, and an electric box (see FIG. (Not shown) and the like, and the rear surface of the machine room 27 is closed and opened by a plurality of panels 36 to 38 so that the compressor is located on the panel 38 and the condenser 29 is located on the rear side of the panel 37. are doing. The panel 3
7 and 38 are formed with a plurality of slits 39.

When the compressor and the blowers 19 and 31 are operated, the cool air cooled by the cooler 17 is cooled by the inclined surface 13C.
Then, the air is blown backward in the duct 12, and is discharged from the discharge port 9 </ b> A at the upper end of the duct plate 9 toward the upper part of the storage room 22. Then, the cool air circulated in the storage room 22 is sucked into the duct 12 from the suction port 8A at the upper end of the duct plate 8, and circulates back to the blower 19 (indicated by a broken arrow in FIG. 2). Thereby, the inside of the storage room 22 is cooled to a freezing temperature such as -20 ° C.

Next, FIG. 4 shows an electric circuit of the low-temperature showcase 1 related to the fluorescent lamps 51, 51. Single-phase AC 10
The 0 V power supply AC is connected to a terminal plate 91, and a second contact (common) of a fluorescent lamp switch 94 is connected to the terminal plate 91 via a lead wire 93 via a coupler 92. The third contact of the fluorescent lamp switch 94 is connected to the male side 97A of a two-pin coupler 97 for switching power supply frequency by a lead wire 93, and the male side 97A is a female side 97B for 50 Hz or a 60HZ for the coupler 97. Is selectively connected to any one of the female sides 97C. Here, it is assumed that it is connected to the female side 97B.

The female sides 97B and 97C of the coupler 97 are connected to the male sides 98A and 99A of the four-pin couplers 98 and 99 by lead wires 93, respectively.
Female sides 98B, 99B of 8, 99 are connected to respective stabilizers 52, 52 by lead wires 93, respectively.

The male sides 98A and 99A of the couplers 98 and 99 are also connected to the two-pin couplers 101 and 102 by lead wires 93.
Are connected to the male sides 101A and 102A, respectively.
The female sides 101B and 102B of the couplers 101 and 102 are connected to the respective glow starters 50 and 50 by lead wires 93, respectively.
51 are respectively connected. Couplers 101, 102
The male sides 101A, 102A of the couplers 98, 99 are also connected to the male sides 98A, 99A and
Connected to.

Reference numerals 104, 104 denote heaters for heating the fluorescent lamp covers (not shown) in which the fluorescent lamps 51, 51 are housed, and male sides 106A, 107 of the couplers 106, 107.
The first contact point of the fluorescent light switch 94 and the coupler 92 are connected via the A and female sides 106B and 107B.

In the above configuration (here, the frequency of the power supply AC is assumed to be 50 Hz), the fluorescent lamp switch 94 is
When closed at the contact point, power is supplied to each of the ballasts 52 (thereby generating heat).
The fluorescent lamps 51, 51 are turned on by the glow starters 50, 50. In a region where the frequency of the power supply AC is 60 Hz, the male side 97A of the coupler 97 may be removed from the female side 97B and connected to the female side 97C. On the other hand, the fluorescent light switch 94
Is closed by the first contact, the power supply to the ballasts 52, 52 is cut off, whereby the fluorescent lamps 51, 51 are turned off. On the other hand, the heaters 104, 104 are energized this time,
The covers of the fluorescent lamps 51, 51 are heated to prevent dew condensation, and the temperature around the fluorescent lamps 51, 51 is kept high.

Here, each ballast 5 is provided on the upper surface of the reflection plate 46.
A mounting plate 11 as a mounting wall located near 2, 52
1, 111 are attached as shown in FIGS.
The mounting plate 111 is made of a stainless steel plate bent at a right angle as shown in FIG.
Is fixed by spot welding to the upper surface. Mounting plate 11
As shown in FIG. 6, the first vertical wall 111B is provided with engagement holes 112 and 113 as narrow engagement portions at an upper end portion, and an engagement hole 114 as a wide engagement portion is provided below the engagement holes 112 and 113. Has been drilled.

Each of the engaging holes 112 to 114 has a rectangular shape, and the left and right central portions are expanded outward. Each of the engagement holes 112 to 114 is separated upward from the bottom wall 111A.

A rectangular through hole 116 is formed in the reflector 46 at a position aligned with the ballast 52, and a screw hole 117 is formed on one side of the through hole 116. 1
A cosmetic screw 118 is screwed into 17 from below (from the storage room 22 side). 7 to 10, reference numeral 121 denotes a closing plate made of a rectangular stainless steel plate. The closing plate 121 substantially coincides with the through hole 116, and has a vertical width that can be inserted into the through hole 116. Also have a large lateral width. A cut 121A is formed at the center of one side of the closing plate 121, and the other side is bent upward in a stepwise manner to form a step 121B.
Are formed.

The mounting plate 111 is also mounted on the upper surface of the closing plate 121 as shown in FIGS.
Here, the mounting plate 111 has a smaller vertical width than the through hole 116, and in this case, the bottom wall 111 </ b> A is fixed to the upper surface of the closing plate 121 by spot welding.

The closing plate 121 is provided with a step portion 121B on the other side.
And the mounting plate 111 is inserted into the through hole 116 so that the step 12
1B is brought into contact with the upper surface of the reflecting plate 46, and the notch 1
A cosmetic screw 118 is passed through 21A, and this cosmetic screw 118 is inserted.
By being tightened, it is detachably attached to the reflection plate 46 as shown in FIG. In this state, the closing plate 121 closes the through hole 116 from below, and the mounting plate 111 stands up above the reflecting plate 46.

One of the mounting plates 111, 111 provided in the vicinity of the stabilizers 52, 52 has female holes 101B, 106B of the couplers 101, 106 and 98 in the respective engaging holes 112-114. 98B (the other mounting plate 111)
Each female side 102B of couplers 102, 107 and 99,
107B and 99B) are respectively attached. The mounting plate 111 on the upper surface of the closing plate 121 is provided with each of the engaging holes 11.
The female sides 97B, 97C of the coupler 97 are attached to 2, 113, respectively.

At this time, each female side 101B, 106B, 9
Panel locks (elastic claws) 131, 131 as engaging arms are formed on both side surfaces of 8B, 97B, and 97C (the same applies to the female sides 102B, 107B, and 99B), and the female sides 101B, 106B, and 98B are formed. , 97B and 97C in the respective engaging holes 112 to 114, 112 and 113 in FIGS.
By inserting the panel locks 131, 131 on both sides of each of the engagement holes 112 to 114, 112, 113 from the middle left side, each of the female sides 101B, 106B,
98B, 97B and 97C (102B, 107B, 99
B) can be attached to the attachment plates 111, 111.

Then, each male side 101A, 106A, 98
A (similarly for male side 102A, 107A, 99A) is connected to each female side thus fixed. The male side 97A of the coupler 97 is alternatively connected to the female side 97B or 97C as described above. In this state, each of the couplers 101, 106, 9
8 and 97 (similarly to 102, 107 and 99) are all separated upward from the reflection plate 46, and each lead wire 93
Will hang down from them.

Accordingly, each of the couplers 101, 106, 98,
97, 102, 107 and 99 float above the reflection plate 46, making it difficult for dew condensation on the surface of the reflection plate 46 itself. 101, 106, 9
8, 97, 102, 107 and 99, and the couplers 101, 106, 98, 97, 102, 107 and 99 are not immersed in the dew condensation on the reflection plate 46,
It is possible to avoid short-circuits and leakage faults without wrapping the coupler in a plastic bag as in the prior art.

In particular, the couplers 101, 106, 98, 97, 102, 10
Since 7, 99 and the mounting plate 111 are heated, the occurrence of dew condensation on them is more effectively prevented or suppressed.
Further, each of the couplers 101, 106, 98, 97, 102,
Since the connections 107 and 99 can be made collectively on the reflector 46 near the fluorescent lamp 51 and the ballast 52, the wiring workability is further improved.

When switching the power frequency of the ballast 52, the decorative screw 118 is loosened, the closing plate 121 is removed from the reflecting plate 46, and the mounting plate 111 is connected to the reflecting plate 4.
6 with the coupler 9 pulled out from the storage room 22 side.
7 can be switched. Therefore, the switching workability can be remarkably improved as compared with the related art.

In the embodiment, the present invention is applied to an electric circuit for a fluorescent lamp in a low-temperature showcase. However, the present invention is not limited to this, and is applicable to electric circuits of various electric components of a refrigerator and other various low-temperature cabinets. It is.

[0040]

As described in detail above , according to the present invention, a cap is provided.
One side of the bracket is attached to the mounting plate at a position
The fluorescent and ballast electrical circuit leads are
It will hang down from the plastic. Therefore, the coupler
Dew condensation hardly occurs on the surface of the lead wire and on the reflector.
Condensation water adhering to the surface flows into the coupler along the lead wire
And the coupler does not submerge in the condensation on the reflector
No need to wrap the coupler in a plastic bag as before
Short-circuits and short circuit faults can be avoided.
Become so.

In particular, one of the couplers is provided with an engagement arm.
This engagement arm is engaged with the engagement hole of the mounting plate to
Since one of them was attached, the work of attaching the coupler
And significantly improve wiring workability of low-temperature storage
be able to.

Also, a mounting plate is provided on the upper surface of the reflection plate.
Therefore, perform coupler connection work near fluorescent lights and ballasts.
And the wiring workability is further improved.
In addition, each coupler and mounting plate
Will be heated, so the formation of condensation on them
It is better prevented or suppressed.

According to the second aspect of the present invention , in addition to the above, the connection of the coupler is switched while the closing plate is removed from the reflector and the mounting wall is pulled out below the reflector, so that the power supply of the ballast can be changed. Since the frequency can be switched, the switching workability can be remarkably improved as compared with the prior art.

[Brief description of the drawings]

FIG. 1 is a perspective view of a low-temperature showcase to which the present invention is applied.

FIG. 2 is a vertical side view of a low-temperature showcase to which the present invention is applied.

FIG. 3 is a plan view of a reflector portion of a low-temperature showcase to which the present invention is applied.

FIG. 4 is an electric circuit diagram related to a fluorescent lamp of a low-temperature showcase to which the present invention is applied.

FIG. 5 is a vertical cross-sectional front view of a reflection plate in a mounting plate portion.

FIG. 6 is a front view of a mounting plate.

FIG. 7 is a vertical sectional front view of a reflection plate in a through-hole portion.

FIG. 8 is a plan view of a reflection plate in a through-hole portion.

FIG. 9 is a front view of a closing plate and a mounting plate attached to the closing plate.

FIG. 10 is a plan view of a closing plate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Low-temperature showcase 2 Heat insulation box 17 Cooler 46 Reflector 51 Fluorescent lamp 52 Ballast 93 Lead wire 97-99 Coupler 101, 102 Coupler 106, 107 Coupler 111 Mounting plate 112-114 Engagement hole 116 Through- hole 118 Make-up screw 121 closing plate 131 panel lock (engagement arm)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 3-575 (JP, U) JP-A 4-110380 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) F25D 23/00 305 F25D 27/00-29/00 A47F 3/04 A47F 11/06-11/10

Claims (2)

(57) [Claims] 1. A lower surface of a reflector for illuminating a storage room.
And a fluorescent lamp attached to the top of the reflector
Ballast, and the fluorescent lamp and ballast
A coupler provided in the middle of the electric circuit,
A mounting plate provided upright on the upper surface, and above the reflector
And an engagement hole formed in the mounting plate at a position separated from the mounting plate.
An engagement arm is formed on one of the couplers, and this engagement arm is
One of the couplers is engaged with the engagement hole so that the mounting plate
A wire mounting device for a low-temperature storage, wherein the device is mounted on a cold storage. 2. A lower surface of a reflector for illuminating a storage room.
And a fluorescent lamp attached to the top of the reflector
Of a ballasted iron core ballast and a feeder circuit to this ballast
A power frequency switching coupler provided on the way;
A through hole formed in the shot plate, and the through hole is closed from below.
A closing plate detachably attached to the reflection plate,
Standing up from the upper surface of the closing plate,
A mounting wall extending in the direction of
In the attached state, the above-mentioned position of the position separated above the reflection plate
An engaging portion formed on a mounting wall, and one of the couplers
To form an engaging arm, and engage this engaging arm with the engaging portion.
That one of the couplers is attached to the mounting wall.
Wiring installation equipment for low temperature storage.