JP3640413B2 - Insulated box with electrical wiring and method for manufacturing the same - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a heat insulating box provided with electrical wiring such as a refrigerator and a method for manufacturing the same.
[0002]
[Prior art]
For example, in a refrigerator under a table used in a kitchen such as a restaurant, a main body is provided with a heat insulating box formed by filling a box-shaped hollow outer shell with a heat insulating material such as urethane foam resin. Yes. In detail, the outer shell is fitted into an outer box having an opening at the center of the front face, and an inner box having an opening at the center of the front face is fitted, and the opening edge of both boxes is closed with a joiner to form a hollow shape. The heat insulation box which provided the entrance / exit in the center part of the front surface is formed by assembling and filling the heat insulating material in the hollow as mentioned above. And the entrance / exit is divided into right and left by attaching a center frame, and a double-spread type heat insulation door is provided to cover the entrance / exit.
[0003]
By the way, in such a refrigerator, a code heater is attached to the inner surface of the center frame in order to prevent condensation on the outer surface of the center frame as the inside of the heat insulating box that is the main body is cooled. Yes. In order to connect this cord heater to a power supply device or the like, it is necessary to wire the lead wire drawn from the upper end portion thereof toward the machine room provided adjacent to the heat insulation box, in which case the lead wire is connected to the cord heater. It is easiest to pull it out to the top side of the heat insulation box. However, in the case of a refrigerator underneath, a top plate serving as a cooking table is stretched over the upper surfaces of the heat insulation box and the machine room, and therefore there is a situation in which the lead wire cannot be drawn out to the upper surface side of the heat insulation box. Therefore, in the case of the lead wire of the code heater, it is bent through the heat insulating material from the joiner part above the center frame and pulled out to the upper arm of the front of the heat insulating box, and along the upper arm to the machine room It is common to wire.
[0004]
As described above, as described in Japanese Patent Application Laid-Open No. 4-22576, as a means for drawing out the lead wire by turning around the heat insulating material, each of the lead wires is opened on the ceiling surface of the inner box and the front surface of the outer box, respectively. It is known that an L-shaped pipe is attached between both openings, and then the pipe is embedded in the heat insulating material by filling the heat insulating material, thereby forming a lead wire drawing passage.
[0005]
[Problems to be solved by the invention]
However, since the conventional type requires an L-shaped pipe separately, the manufacturing cost increases, and the lead wire passes through the L-shaped curved path, so the lead wire hits the pipe halfway. There was a drawback that the insertion work was troublesome because it could not be easily derived.
[0006]
Therefore, an object of the present invention is to provide a heat insulating box body and a method for manufacturing the same, which do not require a special member for inserting a lead wire and can easily perform a lead wire inserting operation.
[0007]
[Means for Solving the Problems]
As a means for achieving the above-mentioned object, the invention of claim 1 is formed by filling a hollow outer shell body having a box shape with a heat insulating material and mounted inside the box of the outer shell body. Insulating box with electrical wiring introduced into the heat insulating material from the inside of the box into the heat insulating material and led to the outside of the box in a direction crossing the introduction direction, and inside the box of the outer shell An introduction port formed on the surface, a lead-out port formed on the surface outside the box of the outer shell, a relay port formed on the surface outside the box opposite to the surface inside the box where the introduction port is formed, A first passage that is drilled so as to allow the introduction port and the relay port to communicate with each other through the heat insulating material, and a first passage that is perforated so as to allow the lead-out port and the relay port to communicate with each other through the heat insulating material. It is characterized by comprising two passages.
[0008]
According to a second aspect of the present invention, a lead wire of an electrical component mounted inside a box of the outer shell body is filled with a heat insulating material in the hollow of the box-shaped hollow outer shell body. Is a method of manufacturing a heat insulating box with electrical wiring introduced into the heat insulating material and led to the outside of the box in a direction intersecting the direction of introduction, and the inlet is provided on the surface inside the box of the outer shell, A step of forming a lead-out port on the surface outside the box, a step of forming a relay port on the surface outside the box opposite to the surface inside the box where the introduction port is formed, and a heat insulating material in the hollow of the outer shell body A step of filling, a step of forming a first passage through which the introduction port and the relay port are communicated with each other through the heat insulating material with a drilling tool, and a lead-out port and a relay port through the heat insulating material with the drilling tool. A step of forming a second passage for communication, and lead wires of electrical components from the introduction port to the outside of the relay port through the first passage A step out can is characterized by sequentially performing the step of pulling out the drawn lead wire to the outside of the outlet through the second passageway from the relay port.
[0009]
[Action]
The operation of the invention of claim 1 is as follows. The lead wire of the electrical component mounted inside the box of the heat insulation box is once drawn out of the relay port while being straightly passed through the first passage from the introduction port inside the box, and then secondly from the relay port. It is passed straight through the passage and pulled out of the outlet. As a result, the lead wire is led from the inside of the box to the outside of the box in a direction that passes through the heat insulating material and intersects the introduction direction.
[0010]
The operation of the invention of claim 2 is as follows. First, an introduction port for introducing a lead wire is formed on the surface inside the box of the outer shell body, and a lead-out port is formed on a surface intersecting the lead wire introduction direction outside the box. At the same time, a relay port is formed on the surface outside the box opposite to the surface on which the introduction port is formed. Thereafter, a heat insulating material is filled in the hollow of the outer shell. Next, a straight first passage that penetrates the heat insulating material and communicates the introduction port and the relay port is formed by a drilling tool such as a drill, and then the heat insulating material is guided by the same drilling tool. A straight second passage that connects the outlet and the relay port is formed. Then, the lead wire of the electrical component mounted inside the box is once pulled out of the relay port while being passed through the first passage from the introduction port, and then the lead wire pulled out is connected to the second passage from the relay port. Is pulled out of the outlet.
[0011]
【The invention's effect】
In other words, according to the first aspect of the present invention, the insertion passage through which the lead wire is bent and inserted in the heat insulating material is formed by the two passages drilled using the relay port. Separate parts for forming the passage are unnecessary and can be manufactured at low cost. Further, when passing the lead wire, it is only necessary to sequentially pass through the two straight passages, so that there is no risk of the lead wire hitting in the middle, and the lead wire insertion work can be performed easily and efficiently. effective.
Moreover, according to invention of Claim 2, there exists an effect which can manufacture reliably the heat insulation box provided with the electrical wiring from which the said effect is acquired.
[0012]
【Example】
An embodiment of the present invention will be described below with reference to FIGS. A present Example illustrates the case where a lead wire is withdraw | derived from the heat insulation box body of a base refrigerator.
As shown in FIG. 1, the undercounter refrigerator of the present embodiment includes a heat insulating box 1 that is a main body, a machine room 2 that is attached to the side of the heat insulating box 1, and a machine from the heat insulating box 1. The top plate 3 is stretched over the upper surface of the chamber 2 and serves as a cooking table.
[0013]
As shown in FIGS. 2 and 3, the heat insulation box 1 includes an outer box 5 and an inner box 6 that is fitted inside the outer box 5 with a space therebetween, and the outer box 5 and the center of the front surface of the inner box 6. Openings 7 and 8 that are aligned with each other are formed in each part. The four open surfaces between the upper and lower and left and right corresponding opening edges 7a and 8a of the outer box 5 and the inner box 6 are connected while being closed by a joiner 9, respectively.
[0014]
The structure of a portion where the outer edges 5a and 8a of the outer box 5 and the inner box 6 are connected by a joiner 9 will be described with reference to FIG. The opening edge 7a of the outer box 5 is formed with a mounting portion 11 that protrudes inward and horizontally, and a rising portion 12 is formed at the tip thereof. A mounting portion 13 is formed on the opening edge 8a of the inner box 6 so as to protrude outward and horizontally.
[0015]
One joiner 9 includes a substrate 15 having a length that extends over the entire length of the opening edges 7a and 8a of both boxes 5 and 6 and that has a width comparable to the distance between the opening edges 7a and 8a of both boxes 5 and 6. Have. A locking portion 16 is formed to rise on the inner side edge of the substrate 15, and a rising portion 17 having a lower height than the locking portion 16 is located slightly outside the center in the width direction. Is formed. In addition, a connecting portion 18 is formed at a position slightly inward from the center in the width direction of the substrate 15, and a holding portion 19 that is bent in a square shape with its apex downward is formed inside the upper end. . On the outer side of the upper end of the connecting portion 18, a horizontal portion 20 whose tip protrudes to a position outside the above-described rising portion 17 is formed, and a collar portion 21 is formed on the tip.
[0016]
The engaging portion 16 at the inner edge of the joiner 9 is locked inside the opening edge 8 a of the inner box 6, and the mounting portion 13 of the inner box 6 is held between the holding portion 19 and the substrate 15. In addition, when the rising portion 12 of the mounting portion 11 of the outer box 5 is inserted between the flange portion 21 of the horizontal portion 20 and the rising portion 17 of the joiner 9, the opening edge of the outer box 5 and the inner box 6. The upper sides of 7a and 8a are connected while being closed by a joiner 9. Similarly, the other three sides of the lower side and the left and right sides are connected by the joiner 9 in the same manner, thereby forming a hollow box shape in which an opening serving as an entrance / exit 24 is provided at the center of the front surface. The outer shell body 23 is assembled.
[0017]
An introduction for introducing a lead wire 43 to be described later between the rising portion 17 and the connecting portion 18 at the center in the length direction on the substrate 15 of the joiner 9 constituting the upper surface portion of the entrance / exit 24 of the outer shell 23. The opening 26 is opened, and an insertion port 27 is formed at a position directly above the introduction port 26 in the horizontal portion 20 of the joiner 9. Further, a lead-out port 28 for the lead wire 43 is formed at the center in the length direction of the upper collar 5 a of the front surface of the outer box 5. Further, on the upper surface of the outer box 5, a front end side is directly above the introduction port 26 and the insertion port 27 of the joiner 9, and a long hole-like relay port 29 extending rearward therefrom is formed. That is, the introduction port 26, the insertion port 27, the outlet port 28, and the relay port 29 are formed on the same vertical plane. An attachment hole 31 is formed at a position outside the introduction port 26 of the substrate 15 of the joiner 9, and a screw hole 32 is formed at a position corresponding to the attachment hole 31 of the attachment portion 11 of the outer box 5. ing.
[0018]
As shown in FIG. 2, a center frame 34 is attached to the central portion in the width direction of the entrance / exit 24 of the outer shell 23 described above. The center frame 34 is formed on both sides of the main body plate 35 in a U-shaped cross-section in which side plates 36 having a depth substantially equal to the depth of the entrance / exit 24 are formed at right angles, and as shown in FIG. The attachment part 37 is formed by extending both ends and bending at right angles. The mounting portion 37 of the center frame 34 has a leading edge before the introduction port 26 of the substrate 15 of the joiner 9 when the main body plate 35 of the center frame 34 is fitted in the entrance / exit 24 flush with the front surface of the outer box 5. In the state where it stays on the side, it overlaps with the inner surface of the substrate 15 of the joiner 9, and an insertion hole 40 of a screw 39 is formed in the mounting portion 37. A code heater 42 is attached and attached to the back side of the main body plate 35 of the center frame 34, and a lead wire 43 is drawn from the upper end side of the code heater 42.
Further, the outer shell body 23 is provided with a double door heat insulation door 45 that covers the left and right entrances 24 partitioned by the center frame 34 so as to be opened and closed.
[0019]
Then, the procedure of manufacture of the heat insulation box of a present Example is demonstrated. First, an outer box 5 and an inner box 6 each having an opening 7 and 8 formed in the center of the front surface are prepared, and the upper and lower and left and right opening edges 7a and 8a of both boxes 5 and 6 are connected. Four joiners 9 are prepared. Here, as described above, the joiner 9 for connecting the opening edges 7a and 8a on the upper sides of the boxes 5 and 6 of the four joiners 9 has the lead wire 43 at the center in the length direction. An introduction port 26 and an insertion port 27 are formed, and a lead-out port 28 for the lead wire 43 is formed in advance at the center of the upper collar 5a of the front surface of the outer box 5. A long hole-like relay port 29 extending in the front-rear direction is formed in advance on the upper surface of the outer box 5.
[0020]
Then, the inner box 6 is fitted into the outer box 5 with a certain interval, and the upper and lower and left and right opening edges 7a and 8a of both the boxes 5 and 6 are connected while being closed by the joiner 9, respectively. As a result, the outer shell body 23 having a hollow box shape in which the entrance / exit 24 is provided at the center of the front surface is assembled. At this time, the long hole-like relay port 29 on the upper surface of the outer box 5 has a front end located immediately above the introduction port 26 and the insertion port 27 of the joiner 9 and extends rearward therefrom.
[0021]
Subsequently, the introduction port 26 of the joiner 9 and the outlet port 28 and the relay port 29 of the outer box 5 are respectively closed by sticking a seal tape. In this state, the outer shell body 23 is mounted on a heat insulating material filling jig (not shown), and is a heat insulating material in the hollow of the outer shell body 23 from an inlet (not shown) opened at a predetermined position of the outer box 5. A foamed urethane resin 47 is injected and filled. When the foamed urethane resin 47 is foamed and solidified, the sealing tape attached to the inlet port 26, outlet port 28 and relay port 29 is peeled off. Thereby, the heat insulation box 1 in which the entrance / exit 24 was opened in the center part of the front surface is formed.
[0022]
Next, the center frame 34 with the code heater 42 attached to the back surface is fitted into the central portion of the entrance / exit 24 of the heat insulating box 1, and as shown in FIG. 4, the screw 39 is inserted into the mounting portion 37 of the center frame 34. From the hole 40, the upper or lower joiner 9 is fixed by being screwed into the screw hole 32 of the mounting portion 11 of the outer box 5 through the mounting hole 31 of the substrate 15 of the upper case 9 and tightening.
[0023]
Subsequently, as shown in FIG. 4A, a drilling hole 49 is inserted upward from the introduction port 26 of the joiner 9 through the insertion port 27 toward the front end of the relay port 29 on the upper surface of the outer box 5. Thus, the vertical first passage 51 is formed through the heat insulating material 47. Next, as shown in FIG. 5B, the drill 49 is inserted from the outlet 28 on the front surface of the outer box 5 toward the relay port 29, thereby penetrating the heat insulating material 47, and An oblique second passage 52 is formed so as to communicate with the end portion of the one passage 51 on the relay port 29 side.
[0024]
Then, as shown in FIG. 5A, the lead wire 43 drawn from the upper end of the cord heater 42 affixed to the center frame 34 is straightly introduced into the first passage 51 from the introduction port 26 of the joiner 9. Then, it is pulled out from the relay port 29 once. Subsequently, the drawn lead wire 43 is bent outside the outer box 5 as shown in FIG. 4B, and as shown in FIG. When passing straight through 52, the lead wire 43 is led out from the outlet 28 to the front surface of the heat insulating box 1. When the lead wire 43 is led out in this way, a tape or the like is attached to the relay port 29 to keep the lead wire 43 from protruding from the relay port 29.
[0025]
The heat insulating box 1 thus wired is provided with a heat insulating door 45 at the entrance / exit 24 thereof, and the machine room 2 is installed on one side of the heat insulating box 1, and from the heat insulating box 1 A top plate 3 is stretched over the upper surface of the machine room 2. Then, as shown in FIG. 2, the lead wire 43 led out from the lead-out port 28 of the heat insulation box 1 is wired to the machine room 2 along the upper collar 5a of the front face of the heat insulation box 1, and the machine room 2 It is connected to a power supply device provided inside.
[0026]
That is, in this embodiment, the lead wire 43 of the cord heater 42 affixed to the center frame 34 is introduced into the heat insulating material 47 from the introduction port 26 provided in the joiner 9 and is a surface that intersects the introduction direction. The lead-out port 28 on the front surface of the body 1 is led out, and for that purpose, an insertion passage through which the lead wire 43 is bent and inserted in the heat insulating material 47 is necessary. In this embodiment, Since the insertion passage is formed by the two passages 51 and 52 which are drilled using the relay port 29 formed on the upper surface of the outer box 5, no separate parts for forming the insertion passage are necessary and inexpensive. Can be manufactured. Further, when the lead wire 43 is passed, it is only necessary to sequentially pass through the straight first passage 51 and the second passage 52, respectively, there is no possibility that the lead wire 43 hits the passage in the middle. Can be easily and efficiently performed.
[0027]
Further, since the relay port 29 has a long hole shape, not only the vertical first passage 51 from the introduction port 26 to the relay port 29 but also the first passage 51 intersecting with the first passage 51 from the outlet port 28 to the relay port 29. The second passage 52 that extends obliquely upward can also be easily opened by the drill 49. Further, since the relay port 29 is formed in a long hole shape so as to stop a minimum area necessary for drilling, the strength reduction of the upper surface of the outer box 5 on which the relay port 29 is formed can be minimized. .
[0028]
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and are within the scope not departing from the gist of the present invention other than the following. Various modifications can be made.
(1) Although the case where the lead wire 43 of the cord heater 42 is pulled out is illustrated in the above embodiment, the present invention is similarly applied to the case where the lead wire of other electrical components such as a room light and a sensor is pulled out. it can.
[0029]
(2) In addition, the lead wire 43 is not limited to the location illustrated in the above embodiment. For example, when the lead wire 43 is drawn from the ceiling surface of the inner box 6 to the front surface of the outer box 5, the lead wire is arranged inside the box. Therefore, the present invention can be applied in general to the case where the material is introduced into the heat insulating material and led out to the outside of the box in the direction intersecting with the direction of introduction.
[Brief description of the drawings]
FIG. 1 is an exploded external perspective view of a refrigerator according to an embodiment of the present invention.
FIG. 2 is an external perspective view of a heat insulation box of the present embodiment.
FIG. 3 is a cross-sectional view of the heat insulation box.
FIG. 4 is a partial cross-sectional view for explaining a drilling process.
FIG. 5 is a partial cross-sectional view illustrating a lead wire insertion process.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Thermal insulation box 5 ... Outer box 6 ... Inner box 9 ... Joiner 23 ... Outer shell body 26 ... Inlet 28 ... Outlet 29 ... Relay port 34 ... Center frame 42 ... Code heater (electrical equipment) 43 ... Lead wire 47 ... Insulation 49 ... Drill (drilling tool)
51 ... first passage 52 ... second passage

Claims (2)

A heat insulating material is filled in the hollow of the box-shaped hollow outer shell body, and lead wires of the electrical components mounted inside the box of the outer shell body are introduced into the heat insulating material from the inside of the box. A heat insulation box provided with electrical wiring led out in a direction crossing the introduction direction outside the box,
An inlet formed on a surface inside the box of the outer shell, a lead-out port formed on a surface outside the box of the outer shell, and an outside of the box facing a surface inside the box where the inlet is formed A relay port formed on the surface of the sheet, a first passage that is perforated so as to communicate with the introduction port and the relay port through the heat insulating material, and the outlet port through the heat insulating material. And a heat insulating box having an electrical wiring comprising a second passage drilled so as to communicate with the relay port. A heat insulating material is filled in the hollow of the box-shaped hollow outer shell body, and lead wires of the electrical components mounted inside the box of the outer shell body are introduced into the heat insulating material from the inside of the box. A method of manufacturing a heat insulation box provided with electrical wiring led out in a direction crossing the introduction direction outside the box,
Forming an inlet on the inner surface of the outer shell body and an outlet on the outer surface of the box;
Forming a relay port on a surface outside the box opposite to a surface inside the box where the introduction port is formed;
Filling a heat insulating material in the hollow of the outer shell,
Forming a first passage through the heat insulating material with a drilling tool to communicate the introduction port and the relay port;
Forming a second passage through the heat insulating material with a drilling tool and communicating the outlet and the relay port;
A step of drawing the lead wire of the electrical component from the introduction port to the outside of the relay port through the first passage;
A method for manufacturing a heat insulating box having electrical wiring for sequentially performing a step of drawing the drawn lead wire out of the outlet through the second passage from the relay port.

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