JP7037775B2 - Plate heater - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is used for defrosting, heating, heat retention, antifreezing and dew condensation prevention in biotesting equipment, printing equipment, and medical equipment, and further, automatic sales of warmers such as drinks, such as coffee. It relates to a planar heating element, that is, a plate heater, which is widely used for defrosting machines and refrigerators.

The plate heater is arranged and fixed to an aluminum foil of a predetermined size in a serpentine manner based on a predetermined specification, and both terminal portions of the heater wire are connected to a lead wire via a connecting portion. Further, another aluminum foil is arranged and sandwiched in a sandwich shape on the opposite side of the aluminum foil, and this is attached and fixed to a predetermined part of the other device with an adhesive or an adhesive. It was done.

As described above, both terminal portions of the heater wire in the plate heater are connected to the lead wire via the connecting portion, but will be described in a little more detail. The heater wire is connected to a lead wire by a connection terminal, and functions as a plate heater by connecting the lead wire to a power source (not shown). The connection portion is formed as a connection portion covered with a resin material such as silicon or vinyl chloride which is an insulating material. The resin material of the connecting portion is generally the same as that of the covering portion material of the heater wire or the lead wire.

Then, here, a general method for manufacturing a plate heater will be briefly described with reference to FIG. 1 with reference to FIG.

In the manufacture of the plate heater, the heater wire connected to the lead wire at the connection portion should be routed and arranged on the jig J in which the heater wire is previously set to be routed in a pattern corresponding to the specifications. Start from. After that, when the aluminum foil is placed and a switch (not shown) is turned on, the slide PL1 set to an appropriate temperature is lowered and pressed by the urging force F via the sponge-like elastic body PL2. As a result, the aluminum foil is attached and fixed to the heater wire so as to be wrapped, that is, in the drawn state. At this time, the connection portion is considered to be arranged at an appropriate position in the jig J. Further, the plate heater production is completed by adhesively fixing the aluminum foil to the other side so as to sandwich the heater wire in cooperation with the aluminum foil.

Although FIGS. 6 and 7 show a conventional connection portion, both figures will be used to explain the structure. Reference numeral 3 is a heater wire, which is connected to the lead wire 4 by the connection terminal 16. Then, the connection portion includes a part of the end portion of the heater wire 3 and the lead wire 4, and is wrapped with a plate-shaped resin material such as silicon or vinyl chloride which is an insulating material, and then covered with a high-frequency welder device. It is molded and formed as a connecting portion 20.

The connection portion 20 is formed of a main body portion 150 having a circular cross section and a compressed portion 110 in the vicinity of both ends of the main body portion 150 in a certain range, and further, the compressed portion 110 has a wing shape. Two wing-shaped portions 120 are formed radially and in the target direction with a constant width parallel to the longitudinal direction of the portion main body 130 and the wing-shaped portion main body 130. Needless to say, the wing-shaped portions 120 and 120 in the two compressed portions 110 have the same planar shape.

The wing-shaped portion 120 is generated by deviating from a predetermined position on the jig J due to rolling of the connection portion itself on the jig (when the cross section is circular or elliptical) or the like during the manufacture of the plate heater. It prevents the harmful effect of the shape deformation of the connection portion 20, for example, the shape of the insulating material portion wrapped around the connection terminal 16 is deformed, and the connection terminal 16 itself is exposed or close to it. Similarly, the heater wire Even in the portion 3 and the lead wire 4, it is prevented that the heater wire 3 and the lead wire 4 themselves are exposed or close to the exposed state, thereby improving the insulation performance and thereby preventing the occurrence of electric leakage. It has the function of.

However, since the material of the connecting portion main body 150 is taken by molding the wing-shaped portion 120, the wall thickness of the wing-shaped portion main body 130 becomes thin, and the crimping force to the heater wire 3 and the lead wire 4 is weak. When some kind of load is applied, such as during transportation, a slight gap is generated between the heater wire 3 or the lead wire 4, and in some cases moisture infiltrates, causing rust on the connection terminal 16, and further. Will also have an adverse effect on insulation. Of course, it is possible to increase the size of the connection portion 20, increase the wall thickness of the wing-shaped portion main body 130, and increase the crimping force. There is a concern that workability during plate heater manufacturing will also be adversely affected, and in particular, in products with specifications in which two connections are arranged close to each other, a fairly wide space is required, and the heater wires are arranged accordingly. There is also a problem that the interval, that is, the pitch becomes wide, and the degree of freedom in setting the temperature of the plate heater in the corresponding range becomes narrow.

In view of such a problem of the prior art, the present invention prevents the connecting portion from rolling by the effect of the wing-shaped portion in the prior art, that is, the wing-shaped portion abuts on the jig surface during the production of the plate heater. The connection part can be held in a predetermined position on the jig, and there are major adverse effects due to the shape deformation of the connection part, for example, the exposure of the connection terminal or a state close to it, and the exposure of the heater wire or the lead wire or a state close to it. With the connection, heater and lead wires, without increasing the size of the connection, while retaining the great advantage of preventing problems, thereby improving insulation performance and preventing power leakage. It is an object of the present invention to provide a plate heater which improves the crimping performance between the spaces, prevents the infiltration of moisture and moisture, and solves the problem of rust generation of the connection terminal.

In order to achieve the above object, in the invention according to claim 1, the heater wire is arranged and fixed in a meandering shape based on a predetermined specification on an aluminum foil having a predetermined size, and both terminal portions of the heater wire are attached and fixed. It is configured to be connected to a lead wire via a connecting portion, and the connecting portion includes a main body portion having a circular cross section and a compression-shaped portion in the vicinity of both ends of the main body portion within a certain range. In addition, two wing-shaped portions are formed in the compressed portion in a radial manner with a constant width parallel to the longitudinal direction of the wing-shaped portion main body and the wing-shaped portion main body, and in the wing -shaped portion. Therefore, in addition to preventing the connection portion from rolling during the manufacture of the plate heater, a convex portion is formed on the circumferential side of the central portion in the longitudinal direction of the wing-shaped portion body so as to be continuous with the two wing-shaped portions. Therefore, the crimping force to the heater wire and the lead wire of the wing-shaped portion body is increased to prevent the ingress of moisture and moisture generated when a load is applied during transportation or the like . With such a configuration, the shape of the connection portion is not deformed, it is possible to prevent the connection terminal, the heater wire, and the lead wire from being exposed or close to each other, and the insulation performance can be improved. Not only can this prevent electric leakage, but the convex portion also makes it possible to prevent the ingress of moisture and moisture that occurs when some kind of load is applied, such as during transportation, and rusting of the connection terminals occurs. Can be prevented.

According to the second aspect of the present invention, the cross-sectional shape of the convex portion formed so as to be continuous with the two wing-shaped portions is circular, which is the central portion in the longitudinal direction of the wing-shaped portion main body and is formed on the circumferential side . With this configuration, when a small convex part is formed in the dwarf part of the wing-shaped part main body, it is easier to secure the shape with a circular cross section than with other shapes, so quality is stabilized. Since the cross-sectional area can be made large, the crimping force to the heater wire and the lead wire is increased, and the infiltration of moisture and moisture can be prevented more reliably.

Since the present invention is configured as described above, the present invention has the effects as described below.

In the plate heater according to the present invention, the heater wire is arranged and fixed in a serpentine manner on an aluminum foil of a predetermined size based on a predetermined specification, and both terminal portions of the heater wire are connected to the lead wire via a connecting portion. The connection portion is configured to be connected, and a compression-shaped portion is formed in a certain range in the vicinity of a main body portion having a circular cross section and both ends of the main body portion, and further, the compression-shaped portion is formed. In the In addition to preventing the portion from rolling, a convex portion is formed at the central portion in the longitudinal direction of the wing-shaped portion main body and on the circumferential side so as to be continuous with the two wing-shaped portions, so that the heater wire of the wing-shaped portion main body and the heater wire of the wing-shaped portion main body are formed. The crimping force to the lead wire is increased to prevent the ingress of moisture and moisture generated when a load is applied during transportation, so the shape of the connection part should be deformed by preventing the connection part from rolling. It is possible to prevent the connection terminal, heater wire and lead wire from being exposed or close to it, and the insulation performance can be improved, thereby not only preventing electric leakage but also convexity. Due to the shape part , the crimping force to the heater wire and lead wire of the wing-shaped part body is increased without increasing the size of the connection part, and the heater wire, lead wire and wing-shaped part body when some load is applied such as during transportation. It is possible to prevent the generation of a gap between the two, it is possible to prevent the infiltration of moisture and moisture, and it is possible to prevent the generation of rust on the connection terminal.

Further, in the plate heater according to the present invention, since the cross-sectional shape of the convex portion formed in the central portion in the longitudinal direction of the wing-shaped portion main body and on the circumferential side so as to be continuous with the two wing -shaped portions is circular, the wing-shaped portion is formed. When forming a small convex part in the dwarf part of the main body, it is easier to secure the shape with a circular cross section than with other shapes, so quality can be stabilized and the cross-sectional area can be large. The crimping force to the heater wire and the lead wire is further increased, and the infiltration of moisture and moisture can be prevented more reliably.

Hereinafter, embodiments of the plate heater according to the present invention will be described in detail with reference to FIGS. 1 to 5 and with reference to FIGS. 8 to 11. FIG. 1 is a plan view showing an embodiment of a plate heater according to the present invention, and FIG. 2 is a detailed explanatory view showing an embodiment of a connection portion used for the plate heater according to the present invention. 3 is a sectional view taken along the line BB in FIG. 2, FIG. 4 is a sectional view taken along the line CC in FIG. 2, and FIG. 5 is a sectional view taken along the line AA in FIG. .. 8 is a simplified plan view for explaining the connection terminals, FIG. 9 is a sectional view taken along the line EE in FIG. 8, FIG. 10 is a sectional view taken along the line FF in FIG. FIG. 8 is a cross-sectional view taken along the line GG in FIG.

In the plate heater according to the present invention, the heater wire is arranged and fixed in a serpentine manner on an aluminum foil of a predetermined size based on a predetermined specification, and both terminal portions of the heater wire are connected to the lead wire via a connecting portion. Other aluminum foils are arranged and sandwiched in a sandwich shape on the side opposite to the aluminum foil so as to be connected, and the main body portion 15 having a circular cross section and the main body portion are connected to the connecting portion. A compressed portion 11 is formed in a certain range in the vicinity of both ends of the fifteen, and the compressed portion 11 has a wing-shaped portion main body 13 and a constant width parallel to the longitudinal direction of the wing-shaped portion main body 13. , Two wing-shaped portions 12 are formed radially and in the target direction, and a convex portion 14 is provided on the circumferential side of the wing-shaped portion main body 13 in the longitudinal direction so as to be continuous with the two wing-shaped portions 12. The basic structure is what was formed. It should be noted that the type of the aluminum foil arranged state includes not only the one in which the heater wire is sandwiched from both sides but also the one in which the heater wire is held only on one side. Hereinafter, detailed explanations will be given in order.

Then, the structure of the plate heater according to the present invention will be described with reference to FIGS. 1 to 5. Reference numeral 3 is a heater wire, which is formed of a covering portion 10 in which a resistance wire 8 is wound around a core wire 9 and the surface thereof is covered with an insulating material such as silicon or vinyl chloride. The heater wire 3 is arranged in a meandering manner with a predetermined pitch P based on a predetermined specification, and both terminal portions thereof are connected to a lead wire 4 by a connection terminal 16. The connection portion is formed as a connection portion 2 covered with an insulating material such as silicon or vinyl chloride. It is desirable that the insulating material covering the covering part of the heater wire, the covering part of the lead wire, and the covering part, that is, the connection terminal is the same material, so it is added just in case. I will decide.

As described above, the heater wire 3 connected to the lead wire 4 by the connecting portion 2 is arranged and sandwiched in a sandwich shape with the aluminum foils 5 and 6 as shown in FIG. 5, and further, an adhesive is applied to the back surface. By arranging the release paper 7 via the plate heater 1, the plate heater 1 is configured. Attachment to a predetermined portion of the mating device is performed by peeling off the release paper 7.

Subsequently, the connection portion 2, which is the greatest gist of the plate heater according to the present invention, will be described in detail with reference to FIGS. 8 to 11 with reference to FIGS. 2, 3 and 4.

In explaining the connection portion 2, a method of connecting the heater wire 3 and the lead wire 4 will be described just in case. Needless to say, the connection is made by the connection terminal 16, and the connection terminal 16 is made of a plate-shaped conductive material and has a lead wire grip portion 17, a heater wire grip portion 19, and a core wire grip portion 18 of the heater wire 3. It is integrally formed, and at a constant length of the lead wire 4 terminal portion, the lead wire grip portion 17 is gripped in a state where the covering portion is peeled off, and the terminal portion is constant even in the heater wire 3. With the covering portion 10 peeled off, it extends to the lead wire gripping portion 17 including the heater wire gripping portion 19 and the core wire gripping portion 18 of the heater wire, and is connected to the lead wire 4 here. It is designed to be gripped after being made to grip. Each grip portion is securely gripped in a caulked state, with 171 being a lead wire accommodating portion, 181 being a core wire accommodating portion, and 191 being a heater wire accommodating portion. In addition, since the heater wire 3 grips the heater wire grip portion 19 including the covering portion 10, it is added as a precaution.

After the wiring is made in this way, the connection portion 2 is formed by covering the range including the part of the end portions of the heater wire 3 and the lead wire 4 with the connection terminal 16 as the center with silicon or vinyl chloride which is an insulating material. Although it is formed, the molding method starts by wrapping a plate material of an insulating material in the required range of the connection portion. After that, the connection portion 2 is formed by setting it in the mold of the high frequency welder device set based on the specifications and activating the high frequency welder device.

Subsequently, the connection portion 2 will be described with reference to FIGS. 2 and 3. The connection portion 2 has a main body portion 15 having a circular cross section and a compressed portion 11 formed in a certain range in the vicinity of both ends of the main body portion 15, and further, the compressed portion 11 has a wing shape. Two wing-shaped portions 12 are formed radially and in the target direction with a constant width parallel to the longitudinal direction of the wing-shaped portion main body 13 and the wing-shaped portion main body 13, and are the central portion in the longitudinal direction of the wing-shaped portion main body 13. A convex portion 14 is formed on the circumferential side so as to be continuous with the two wing-shaped portions 12. The convex portion 14 has a function of increasing the crimping force to the heater wire 3 and the lead wire 4 in the wing-shaped portion main body 13 without increasing the shape of the connecting portion. Needless to say, the wing-shaped portions 12 and 12 in the two compressed portions 11 have the same planar shape.

FIG. 4 shows the details of the convex portion 14, and will be described in detail below with reference to this figure. In this figure, reference numeral 9 is a core wire of the heater wire 3, and a resistance wire 8 is wound around the core wire 9 and its surface is covered with an insulating material such as silicon or vinyl chloride. It is understood that the portion 10 is formed. Further, it can be understood that the convex portion 14 is formed on the wing-shaped portion main body 13.

Here, the convex portion 14 will be further described. It has been explained that the convex portion 14 is formed so as to be continuous with the two wing-shaped portions 12 at the central portion in the longitudinal direction of the wing-shaped portion main body 13 and on the circumferential side. Is not limited to the central portion in the longitudinal direction of the wing-shaped portion main body 13, and it is natural that the wing-shaped portion main body 13 is formed at an appropriate position in the longitudinal direction in the wing-shaped portion main body 13 as needed. Further, the shape is not limited to the circular cross section shown in FIG. 4, and any shape may be used, and the size thereof is also set as necessary. The point is that the entire connection portion 2 is the basis, and the specifications of the wing-shaped portion main body 13 and the wing-shaped portion 12 and the convex portion 14 accompanying the compressed portion 11 are the moisture or moisture from the connecting portion 2. By preventing entry, it is the most important matter to prevent the problem of rusting of the connection terminal 16 and to improve the insulation performance accordingly, so it is necessary to carefully consider and set it. Needless to say,

It is a top view which shows one Embodiment of the plate heater by this invention. It is a detailed explanatory drawing which shows one Embodiment of the connection part used for the plate heater by this invention. FIG. 2 is a cross-sectional view taken along the line BB in FIG. FIG. 2 is a cross-sectional view taken along the line CC in FIG. FIG. 3 is a sectional view taken along the line AA in FIG. It is a detailed explanatory drawing which shows the conventional connection part. FIG. 6 is a cross-sectional view taken along the line DD in FIG. It is a simplified plan view for explanation of a connection terminal. FIG. 8 is a cross-sectional view taken along the line EE in FIG. FIG. 8 is a cross-sectional view taken along the line FF in FIG. FIG. 8 is a cross-sectional view taken along the line GG in FIG. It is a simplified drawing of the press apparatus for manufacturing a plate heater.

1 Plate heater 2, 20 Connection part 3 Heater wire 4 Lead wire 5, 6 Aluminum foil 7 Release paper 8 Resistance wire 9 Core wire 10 Covered part 11,110 Compressed part 12,120 Wing part 13,130 Wing part body 14 Convex Part 15,150 Main body part 5,6
16 Connection terminal 17 Lead wire grip 171 Lead wire grip 18 Core wire grip 181 Core wire storage 19 Heater wire grip 191 Heater wire grip PL Press device PL1 Slide PL2 Elastic body PL3 Bet J Jig P pitch

Claims (2)

The heater wire is arranged and fixed in a serpentine shape on an aluminum foil of a predetermined size based on a predetermined specification, and both terminal portions of the heater wire are connected to the lead wire via a connecting portion. In the connection portion, a compression-shaped portion is formed in a certain range in the vicinity of the main body portion having a circular cross section and both ends of the main body portion, and further, the compression-shaped portion has a wing-shaped portion main body. Two wing-shaped portions are formed radially with a certain width parallel to the longitudinal direction of the wing-shaped portion main body and in the target direction, and the wing -shaped portions prevent rolling of the connecting portion during plate heater manufacturing. , A convex portion is formed on the circumferential side of the wing-shaped portion main body in the longitudinal direction so as to be continuous with the two wing-shaped portions, and a crimping force is applied to the heater wire and the lead wire of the wing-shaped portion main body. A plate heater characterized by being made large to prevent the ingress of moisture and moisture generated when a load is applied during transportation . The plate heater according to claim 1, wherein the convex portion formed to be continuous with the two wing-shaped portions has a circular cross-sectional shape at the central portion in the longitudinal direction of the wing-shaped portion main body and on the circumferential side .

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