JP3206352B2 - Digging - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digging device in which a sheet heater is provided along an inner surface of a digging device which is buried in a floor.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, a box-shaped digging trowel having an open top and a planar heater (b) provided along the inner bottom surface of a main body (a). Are known. In the digging trowel, a frame body (e) is installed and fixed on the periphery of the mounting opening (d) formed in the floor (c), and the digging trowel body (a) is mounted on the frame (e). ) Is fixedly connected to the upper opening edge. In addition, a tower body (h) is installed above the mounting opening (d), and in this case, a leg body (g) vertically hanging on a square of a top plate (f) of the roof body (h) is provided. It is erected and fixed on the frame (e). Therefore, in the digging trotting, the inside of the digging trotting main body (a) is heated by the planar heater (b), and the toes are directly placed on the planar heating (b), The lower body is heated.

[0003]

However, in the above-mentioned prior art, in order to prevent low-temperature burns on the toes placed on the planar heater (b), the planar heater (b) is used.
Is set low, so that the entire inside of the squid main body (a) cannot be sufficiently heated. In addition, although the toe is warmed by the planar heater (b), the entire lower body is not effectively warmed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art, that is, the problem is that the entire inside of the squid body is sufficiently warmed and not only the toes but also the lower body The purpose is to provide a sculpture that is effectively warmed throughout, especially the calf, and is free from burns.

[0005]

According to a first aspect of the present invention, there is provided a digging trowel according to the first aspect of the present invention, in which a box-shaped digging trowel main body having an open top is provided with a bottom planar heater along an inner bottom surface thereof. and沿設side surfaces shaped heater on the inside surface of the moat Rigotatsu body, and characterized by being set higher than the temperature of the bottom surfaces shaped heater temperature side surfaces shaped heater.

Further, the digging trowel according to claim 1 is for side use.
The lower end of the planar heater is used as a heel contact portion, and the temperature of the heel contact portion is determined.
The temperature is set to be as low as that of the bottom heater.
And

[0007] The digging trowel according to the second aspect of the present invention,
2. The squid as claimed in claim 1, wherein the bottom heater is a sheet heater.
And the side sheet heater are integrally formed as a single sheet heater.
The boundary between the bottom sheet heater and the side sheet heater
Is formed as a bendable part, and the same surface heater is formed so as to be freely deployable.
It is characterized by having.

[0008] The digging trowel according to claim 3 of the present invention,
3. The squid as set forth in claim 2, wherein the side sheet heater is provided.
The wiring density of the heater wires of
It is characterized by being formed higher than the linear density.

[0009]

In the digging device according to the first aspect of the present invention, a box-shaped digging device with a bottom is provided along the inner bottom surface of the box-shaped rigging device, and the digging device has a bottom heater. Since the side surface heater is provided along the inner surface of the main body, the entire inside of the digging main body can be sufficiently warmed by the bottom surface heater and the side surface heater. Since the temperature of the side surface heater is set higher than that of the bottom surface heater, not only the toes but also the entire lower body, particularly the calf portion, are effectively warmed and there is no fear of low-temperature burns. .

[0010] Further, in the digging trowel according to claim 1
The lower end of the side sheet heater serves as a heel contact portion.
The temperature of the contact is set to be as low as the bottom surface heater.
Therefore, the lower end of the side sheet heater
Low temperature heel abutment for low temperature burn safety
Is further improved.

[0011] The dugout odor according to claim 2 of the present invention.
In particular, the bottom sheet heater and the side sheet heater
Is formed integrally as a planar heater, and the bottom planar heater
The border line with the side sheet heater becomes a bendable
Since the planar heater is formed to be freely deployable,
Heater and side heater are combined as a sheet heater
Easy and accurate installation along the inner surface of the body
In-out, moreover, when not in use storage of the planar heater, when PACKING
For example, the sheet heater is folded at the bendable
Or flatten the heater by deploying the same heater.
I can put it.

The sculpture according to claim 3 of the present invention.
In particular, the wiring density of the heater wire of
Formed higher than the wiring density of the heater wire
The side surface heater and the bottom surface heater are separate
There is no need to control the temperature, and the side surface heater and bottom surface
The heater wire to the heater can be wired as a series circuit.
Comes easy to manufacture as a single planar heater
Can be.

[0013]

EXAMPLES 1, 2, 3, digging associated with the present invention
The digging trowel shown in each figure is a box-shaped digging trowel with an open bottom and a bottom sheet heater 2 provided along the inner bottom surface of a box-shaped digging trowel main body 1 opened upward. A side surface heater 3 is provided along the inner surface of the main body 1, and the temperature of the side surface heater 3 is set higher than the temperature of the bottom surface heater 2.

In the digging trowel , the bottom planar heater 2 and the side planar heater 3 are integrally formed as a single planar heater 4, and the bottom planar heater 2 and the side planar heater 4 are integrally formed. The border line with the heater 3 forms a bendable portion 5, and the same-surface heater 4 is formed to be freely deployable. Further, the wiring density of the heater wire 6 of the side sheet heater 3 is formed higher than the wiring density of the heater wire 6 of the bottom sheet heater 2.

A frame 9 is installed and fixed to the periphery of the mounting opening 8 formed on the floor 7, and the upper opening edge of the sculpture main body 1 is fixedly connected to the frame 9. In addition, a tower body 12 is installed above the mounting opening 8, and in this case, a leg 11 vertically hanging on a square of the top plate 10 of the tower 12 is fixed upright on the frame 9. ing. An outlet 13 is attached to the upper part of the inner surface of the squib main body 1, and a plug 14 provided at the tip of a power cord led out from the sheet heater 4 is connected to the outlet 13. Planar heater 4
, So that the power cord does not interfere with the floor 7. Similarly, an operation code is led out from the sheet heater 4, and the operation code extends from the mounting opening 8 to the outside of the squid main body 1, and a controller 15 provided at the tip of the operation code. Thereby, the temperature of the heater 4 is adjusted.

Also, the digging main body 1 comprises a bottom plate 16 and the bottom plate.
It is assembled in a box shape opened upward by a side plate 17 standing upright on the periphery of 16. As shown in FIG. 2, the bottom plate 16 and the side plate 17 are filled with a heat insulating material 19 made of a synthetic resin foam between both surface plates 18 made of plywood, and a core material made of plywood is provided around the periphery of the heat insulating material 19. 20 is formed so as to prevent heat from escaping to the outside from the dugout main body 1. In addition, a female part 21 carved to the core material 20 on the inner surface near the lower end of the side plate 17 is fitted with a male part 22 projecting outward from the core material 20 on the peripheral edge of the bottom plate 16. The bottom plate 16 and the side plate 17
Are bonded and fixed, and the digging main body 1 is assembled in a box shape.

Further, the side sheet heaters 3 are extended from all four sides of the bottom sheet heater 2 to form the sheet heater 4 integrally. In this case, the bottom sheet heater 2 is required. The side sheet heaters 3 may be extended only on the sides and the sheet heaters 4 may be integrally formed. The sheet heater 4 is formed in substantially the same manner as a known electric carpet, and the temperature is adjusted by a stepless switch 24 provided in the controller 15. In the sheet heater 4, the heater wire of the side sheet heater 3 is used. 6, the wiring density of the bottom surface heater 2 is higher than the wiring density of the heater wire 6 of the bottom surface heater 2, and the temperature of the side surface heater 3 is always higher than the temperature of the bottom surface heater 2. Become.
A concave portion 23 is formed at the outer edge of one side planar heater 3 of the planar heater 4, and the power cord and the operation code are led out from the concave portion 23, and the concave portion 23 is formed. Therefore, the outlet 13 is accommodated in the portion 23. Therefore, in the digging trowel of this embodiment, the inside of the digging trowel main body 1 is formed from the bottom and the front circumference by the bottom surface heater 2 and the side surface heater 3. The whole can be sufficiently warmed, and in this case, the temperature of the side surface heater 3 becomes higher than the temperature of the bottom surface heater 2, so that not only the toes but also the entire lower body, particularly the calf portion, is effective. Since the temperature of the bottom heater 2 on which the toes are placed is lowered, there is no fear of low-temperature burns.

Further, in the digging trowel , in particular, the bottom planar heater 2 and the side planar heater 3 are collectively housed as a single planar heater 4 inside the digging main body 1. And a bottom surface heater 2 and a side surface heater 3
Can be accurately and easily provided along the inner bottom surface and the inner side surface of the digging main body 1, respectively. In addition, since the sheet heater 4 is thinly accommodated inside the squid main body 1, a large internal space of the squid main body 1 is ensured. At times, the planar heater 4 can be folded down by the bendable portion 5 to be compact, or the planar heater 4 can be developed to be flat and thin. Further, since the temperature difference between the side planar heater 3 and the bottom planar heater 2 is obtained by the difference in the wiring density of the heater wires 6, the side planar heater 3 and the bottom planar heater 2 are used.
It is not necessary to separately control the temperature of the side surface heater 3.
The heater wire 6 of the sheet heater 2 and the bottom sheet heater 2 can be wired as a series circuit, and can be easily manufactured as a single sheet heater 4.

The planar heater 4 shown in FIG. 4 relates to the present invention.
Another example of a digging trowel , the surface heat in this example
In the heater 4 , the heater wire 6 of the side sheet heater 3 and the heater wire 6 of the bottom sheet heater 2 are wired at the same density. The heater wire 6 of the sheet heater 2 is wired as a separate parallel circuit. Therefore, in this case, the wattage of the heater wire 6 of the side surface heater 3 is set to be higher than the wattage of the bottom surface heater 2 or the power supply of the heater wire 6 of the side surface heater 3 is performed. The temperature of the side sheet heater 3 is made higher than the temperature of the bottom sheet heater 2 by microcomputer control by the controller 15 so that the rate becomes higher than the energization rate of the bottom sheet heater 2. Can be set. Other than that
The configuration is the same as that of the above example, and the same operation and effect as the above example can be obtained.

The planar heater 4 shown in FIG. 5 relates to the present invention.
This is still another example of a digging pit, and in the planar heater 4 of this example , the heater wire 6 of the side planar heater 3 and the heater wire 6 of the bottom planar heater 2 are wired with the same density. In this case, the controller 15 controls the side stepless switch 25 for adjusting the temperature of the side sheet heater 3 and the temperature adjustment of the bottom sheet heater 2. A stepless switch 26 for bottom is provided, and the stepless switch 25 for side and the stepless switch 26 for bottom control the on / off operation of the side sheet heater 3 and the bottom sheet heater 2 and temperature adjustment. It can be done separately. However, even in this case, the controller 15 controls the temperature of the side planar heater 3 to be higher than the temperature of the bottom planar heater 2. Otherwise be configured similarly to the above example <br/>, the same effect as the above example are achieved.

Here, the digging trowel shown in FIG.
In this embodiment, the lower end portion of the side heater 3 is used as a heel contact portion 27, and the temperature of the heel contact portion 27 is the same as that of the bottom surface heater 2. It is set to a low level. In this case, as shown in FIG.
The heel contact portion 27 is formed by omitting the wiring pattern of the heater wire 6 in the portion close to the bottom planar heater 2 of FIG. Therefore, in the digging trowel of this embodiment, the lower end portion of the side surface heater 3 to which the heel easily contacts is the heel contact portion 27 having a low temperature, so that the safety against low-temperature burn is further improved. Is done. Otherwise, the configuration is the same as in the above embodiment, and the same operation and effect as in the above embodiment are achieved.

FIG. 8 shows still another embodiment of the present invention. In the embodiment of the present invention, the lower end portions of the bottom surface heater 2 and the side surface heater 3 are different from each other. Carpet 28 is laid inside the body 1
The entire surface of the planar heater 4 has the same temperature, but the temperature of the portion where the carpet 28 is laid is low. Therefore, also in the digging trowel of this embodiment, the temperature of the exposed portion of the side sheet heater 3 becomes higher than the temperature of the bottom sheet heater 3 covered with the carpet 28, and The lower end portion of the planar heater 3 covered with the carpet 28 is a heel contact portion 27, and the temperature of the heel contact portion 27 is reduced to substantially the same level as that of the bottom planar heater 3. The same operation and effect as in the embodiment can be obtained.

[0023]

As described above, in the digging device according to the first aspect of the present invention, the entire inside of the digging device is sufficiently heated by the bottom surface heater and the side surface heater. In this case, since the temperature of the side surface heater is set higher than the temperature of the bottom surface heater, not only the toes but also the entire lower body, particularly the calf portion, are effectively warmed, No burns.

Furthermore, in the moat Rigotatsu according to the first aspect of the present invention, since the heel lower end portion of the abutting easy side surfaces shaped heater has a low heel abutment temperature, for low-temperature burn Safety is further improved.

[0025] Also, in the digging trowel according to claim 2 of the present invention.
In particular, the bottom surface heater and the side surface heater
The inner surface of the main body of the digging device as a single sheet heater
Can be easily and accurately installed alongside
When storing the heater when not in use, packing and transporting, etc.
Foldable at the bendable part to make it compact or
The flat heater can be unfolded and stored thin and flat.

[0026] Further, in the digging trowel according to claim 3 of the present invention.
In particular, the side surface heater and the bottom surface heater
The temperature difference is obtained by the difference in the wiring density of the heater wires.
Therefore, the side sheet heater and the bottom sheet heater are separately heated.
There is no need to control the temperature, and the side surface heater and bottom surface heater
The heater wire with the heater can be wired as a series circuit.
Therefore, it can be easily manufactured as the single planar heater.
it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a digging trowel related to the present invention.

FIG. 2 is a sectional view of a main part of the digging iron.

FIG. 3 is a schematic development view of a planar heater in the dugout.

FIG. 4 is a schematic development view of another planar heater in a digging trowel related to the present invention .

FIG. 5 is a schematic development view of still another planar heater in a digging trowel related to the present invention .

FIG. 6 is a schematic sectional view of a digging trowel according to an embodiment of the present invention .

FIG. 7 is a schematic development view of a planar heater in the dugout.

FIG. 8 is a schematic cross-sectional view of a digging tub which is still another embodiment.

FIG. 9 is a schematic sectional view of a digging trowel according to a conventional example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 digging main body 2 sheet heater for bottom 3 sheet heater for side 4 sheet heater 5 bendable section 6 heater wire 27 heel contact section

Continuation of the front page (56) References JP-A-63-148026 (JP, A) Jikken Sho 53-23945 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24C 7 / 06 F24C 1/00

Claims (3)

(57) [Claims] 1. A bottom sheet heater is provided along an inner bottom surface of a box-shaped digging trowel body opened upward, and a side sheet heater is provided along an inner surface of the digging trotting body. was set higher than the temperature of the bottom surfaces shaped heater temperature side surfaces shaped heater
Near the bottom surface heater of the side surface heater
A heel contact portion is formed at the portion where the heel abuts.
<br/> A digging trowel characterized by being set to be as low as a surface heater . 2. A bottom sheet heater and a side sheet heater are integrally formed as a single sheet heater, and a boundary portion between the bottom sheet heater and the side sheet heater is freely bendable. 2. The digging iron according to claim 1, wherein the heater is formed as a part so as to be freely deployable. 3. The digging trowel according to claim 2, wherein the wiring density of the heater wire of the side sheet heater is formed higher than the wiring density of the heater wire of the bottom sheet heater.