JP7211615B2 - Heater and suitable cable retention structure - Google Patents

Description

The present invention relates to a heater used, for example, in a sealing device of a bag making apparatus, particularly a heater provided in a semi-fixed portion of a sealing device which is fixed in a normal state of use but retracts to a predetermined position in a non-use state. and a holding structure for a cable for supplying power to the heater.

For example, for supplying power to electric parts such as heaters installed in structures that move up and down intermittently during normal use, such as the moving part of a sealing device with a built-in heater in a bag making machine. In order to prevent excessive force from acting on the connection terminals of electrical components and the connection at the tip of the core wire of the cable, and to prevent breakage of the core wire itself due to metal fatigue, the movable part and fixed part of the cable should be separated from each other. Measures such as securing a sufficient amount of deflection between On the other hand, like the semi-fixed part of the sealing device, although it is fixed in normal use, it is configured to descend to a predetermined retracted position in order to avoid contact with the resin film when the device is not in use. With regard to the cable for supplying power to the electrical parts provided in the structure, the amount of deflection is secured only to the extent that it does not hinder the vertical movement, and the connection terminals and core wires of the electrical parts are not There is a problem that excessive force acts on the connection portion at the tip of the wire, and the core wire is detached from the connection terminal of the electrical component of the semi-fixed portion due to repeated up-and-down movements. A similar problem also occurs when the semi-fixed portion of the sealing device is removed from the bag making device for maintenance.

FIG. 8 shows the structure of the semi-stationary portion of the sealing device and the conventional heater incorporated therein. In FIG. 8, the upper position drawn with a solid line indicates the position of the semi-fixed portion of the sealing device in the normal operating state of the bag making apparatus, and the lower position drawn with a dashed line indicates the position of the bag making apparatus when it is not in use. 4 shows the position of the semi-stationary portion of the sealing device in use. As shown in the figure, in the semi-fixed portion 1 of the sealing device, a heater 20 is fitted in a cylindrical fitting hole 11 formed in the center of the mold 10, and power is supplied to the heater 20. The tip of the core wire 31 of the cable 30 is connected to a connection terminal 24 projecting horizontally from the heating element 22 by welding or the like. The core wire 31 of the cable 30 and the connection portion P1 of the connection terminal 24 of the heater 20 are filled with a heat-insulating adhesive 26 such as cement or epoxy resin, and a portion of the cable 30 is attached to the housing 21 of the heater 20 by the resin. Fixed. However, the housing 21 is not particularly provided with a cable holding structure for holding the cable 30 .

In the case of the sealing device, a cable 30 having a thick core wire 31 of 0.75 sq to 3.5 sq, for example, is used in order to supply a large amount of power to the heater 20 . In addition, since the cable 30 is fixed to the frame of the bag making apparatus, etc., and the amount of bending of the cable 30 is small as described above, when the semi-fixed part 1 is moved up and down, as indicated by the solid line and the dashed line in the figure, , the cable 30 cannot be smoothly bent between the connection terminal 24, the connection part P1, and the fixing part P2 of the frame, and the force applied to the core wire 31 of the cable 30 is almost unchanged, and the heater 20 is connected. It is transmitted to the connecting portion between the terminal 24 and the core wire 31 , and the core wire 31 becomes easily detached from the connection terminal 24 . Empirically, since the core wire 31 is detached from the connection terminal 24 by removing or moving up and down several times, spare parts for replacement must always be prepared.

On the other hand, conventionally, various devices have been devised to prevent excessive force from acting on the core wire of the cable. In Japanese Patent Laid-Open No. 2002-100000, a cylindrical housing made of resin for storing electrical components such as a sensor is provided with a columnar holding member that protrudes from the rear end of the housing in the direction in which a cable is drawn out. It is disclosed to secure the cable to the As a result, even if a large tensile force is applied to the cable, the binding band absorbs the tensile force applied to the connecting portion between the electric component and the core wire of the cable, preventing the core wire from coming off from the electric component.

In addition, in Patent Document 2, one end of a strip-shaped metal plate having plasticity is bent 90 degrees, and a base end portion for attaching an electric component such as a sensor and outward facing at regular intervals on both longitudinal side surfaces are disclosed. A cable tie protector is disclosed that has a tie tab that protrudes into the . After fixing the electrical parts attached to the base end to another frame with screws, etc., the cable binding protector that holds the cable with the binding piece can be bent in any direction to prevent interference between the cable and other members. can be prevented.

By the way, a cable for supplying electric power to a heater used for welding a resin film, such as a sealing device of a bag making device, is described in Patent Document 1 because it is used in a high-temperature environment. It is practically impossible to use such a simple method of integrating the housing and the holding member using resin molding. Further, as described in Patent Document 2, when the cable bundling protector is bent after the cable is held by the cable bundling protector, the movement of the cable due to the difference in bending radius between the cable and the cable bundling protector is reduced. Because of the absorption, the cable cannot be held firmly by the cable tie protector. Then, when a large tensile force is applied to the cable, the force is applied directly to the connection terminal of the electric component and the connection portion at the tip of the core wire of the cable, and the core wire may come off from the connection terminal of the electric component. Furthermore, since the cable binding protector of Patent Document 2 is manufactured by punching a metal plate by press working, the punched sheared surface is not smooth, and burrs are generated on the edges. When this cable tie protector is used for a cable routed between the semi-stationary part of the sealing device and the frame of the bag making machine, the vertical movement of the semi-stationary part shears the insulation coating of the cable and the cable tie protector. There is a risk that the surfaces will rub against each other and the insulating coating will be destroyed.

JP 2008-193826 A JP-A-11-098651

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and a sealing device of a bag-making machine, for example, which is fixed in a state of normal use but retracts to a predetermined position in a state of non-use. It is a heater used for semi-fixed part of a cable, and even when a large tensile force or bending force is applied to the cable, it can attenuate the force applied to the connection part of the electric parts such as the heater and the connection part of the core wire. To provide a heater capable of preventing a core wire from coming off a connection terminal, and a cable holding structure suitable for the same.

To achieve the above object, a heater according to the present invention includes a heating element, a connection terminal connected to the heating element, and a tip of a core wire connected to the connection terminal for supplying power to the heating element. a cable, a housing for accommodating a part of the heating element and the cable inside, and a cable holding structure fixed to one end of the housing and holding the other part of the cable,
The cable holding structure comprises a cable holding plate for holding the cable and a restraint for fixing the cable to the cable holding plate,
The cable holding plate forms a substantially right angle, a predetermined angle smaller than the right angle, or substantially parallel to the direction in which the base portion fixed to the housing and the connection portion of the connection terminal and the tip of the core wire are pulled out, and the A cable holding portion for holding another portion of the cable by a restraint, and a curved portion formed at a tip opposite to the base portion, wherein at least the cable holding portion and the curved portion are continuous. It is characterized by

The cable holding portion is formed between the base portion and the curved portion so as to form a substantially right angle with respect to a drawing direction of the connection terminal of the heater and the connection portion of the tip of the core wire of the cable. A folded portion may be formed so as to be curved outward in a semicircular shape on the side opposite to the connecting portion, and to be continuous with the curved portion and substantially parallel to the cable holding portion.

Alternatively, the curved portion is curved inward in a semicircular shape from one end of the base portion toward the connecting portion side of the connecting terminal of the heater and the tip of the core wire of the cable, and continues to the curved portion. The cable holding portion may be formed so as to be substantially perpendicular to the direction in which the connecting terminal of the heater and the connecting portion at the tip of the core wire of the cable are pulled out.

Alternatively, the curved portion may be curved inwardly from one end of the base portion toward the connection portion side of the connecting terminal of the heater and the tip of the core wire of the cable, and the cable holding portion may continue to the curved portion. , and may form a predetermined angle smaller than a right angle with respect to the drawing direction of the connection terminal of the heater and the connection portion at the tip of the core wire of the cable.

Alternatively, the cable holding portion may be provided between the base portion and the curved portion so as to form a predetermined angle smaller than a right angle with respect to the drawing direction of the connection terminal of the heater and the connection portion of the tip of the core wire of the cable. and the curved portion is curved outward in a semicircular shape on the side opposite to the connection portion, and a folded portion is formed so as to be continuous with the curved portion and substantially parallel to the base portion. good.

Alternatively, the curved portion is continuous with the base portion and curved outward in a semicircular shape on the side opposite to the connecting portion of the connecting terminal of the heater and the tip of the core wire of the cable, and continuously with the curved portion. The cable holding portion is formed so as to be continuous with the curved portion and substantially perpendicular to a drawing direction of the connecting portion of the connection terminal of the heater and the connection portion of the tip of the core wire of the cable. The folded portion may be continuously formed facing inward.

Alternatively, the curved portion is continuous with the base portion and is curved outward in a quarter circle on the side opposite to the connecting portion of the connecting terminal of the heater and the tip of the core wire of the cable, and continuously with the curved portion. The cable holding portion is formed so as to be continuous with the curved portion and substantially parallel to the drawing direction of the connecting portion of the connection terminal of the heater and the connection portion of the tip of the core wire of the cable. The folded portion may be continuously formed facing inward.

The housing of the heater is made of metal and has a cylindrical shape with a part of the side wall near one end notched, and the base of the cable holding plate of the cable holding structure is the side wall of the housing. may be welded to the housing so as to close the notched end.

The heat generating element is formed by folding a long, thin rod-like object into a substantially U shape at its center, and two long, thin plate-like connecting terminals are connected to the two ends thereof so as to be substantially parallel, and the cable includes a core wire. are covered with an insulating resin, and two cables may be bundled substantially in parallel.

Further, the cable holding structure according to the present invention includes a cable holding plate fixed to a housing that accommodates an electric component to which electric power is supplied and holding a cable; with restraints of
The restraint is a binding band,
The cable holding plate is substantially perpendicular, or at a predetermined angle smaller than a right angle, to the direction in which the base portion fixed to the housing by welding and the connection portion of the connection terminal of the electric component and the tip of the core wire of the cable are pulled out. a substantially parallel cable holding portion for holding another portion of the cable by the restraint; and the curved portion are continuous.

According to the above configuration, the portion of the cable facing the cable holding portion of the cable holding plate is fixed and held by the cable holding portion with the tip of the core wire connected to the heater or the connection terminal of the heater. Therefore, even when a large tensile force or bending force is applied to the cable, most of the force applied to the cable is concentrated at the point where it is restrained by the restraint, and the force applied to the core wire of the cable is transferred through the restraint. It acts on the cable retaining plate and, via the cable retaining plate, on the housing. Therefore, the force acting on the connecting portion between the connection terminal of the heater (electric component) and the core wire of the cable is reduced, and the core wire is less likely to come off from the connection terminal.

The figure which shows the structure of the semi-fixed part of the sealing device which incorporated the heater which concerns on one Embodiment of this invention. 1 is a cross-sectional view showing a first configuration example of a cable holding structure according to one embodiment of the present invention; FIG. Sectional drawing which shows the 2nd structural example of the cable holding structure which concerns on one Embodiment of this invention. FIG. 5 is a cross-sectional view showing a third configuration example of the cable holding structure according to one embodiment of the present invention; FIG. 5 is a cross-sectional view showing a fourth configuration example of the cable holding structure according to one embodiment of the present invention; FIG. 11 is a cross-sectional view showing a fifth configuration example of the cable holding structure according to one embodiment of the present invention; FIG. 11 is a cross-sectional view showing a sixth configuration example of the cable holding structure according to one embodiment of the present invention; The figure which shows the structure of the semi-fixed part of the sealing device which has the heater which is not provided with the conventional cable holding structure.

A heater according to an embodiment of the present invention and a cable holding structure suitable therefor will be described. FIG. 1 shows the structure of the semi-fixed portion of the sealing device provided with a heater according to this embodiment. In FIG. 1, the upper position drawn with a solid line indicates the position of the semi-fixed portion of the sealing device in the normal operating state of the bag making machine, and the lower position drawn with a dashed line indicates the position of the bag making machine when it is not in use. 4 shows the position of the semi-stationary portion of the sealing device in use. The semi-fixed part 1 of the sealing device includes a substantially rectangular parallelepiped mold 10 made of, for example, aluminum, a heater 20 fitted into a cylindrical hole 11 formed in the center of the mold 10, and a heater 20. , and includes a cable 30 and the like for supplying power. In normal use, the mold 10 and the heater 20 are attached to the bag making apparatus so that their longitudinal directions are horizontal. The heater 20 includes a cylindrical housing 21 made of metal such as stainless steel, a heating element 22 such as a nichrome wire provided in the housing 21, and the housing 21 filled to hold the heating element 22. and a connection terminal 24 connected to the heating element 22 and extending horizontally from the end of the insulator 23 .

The heating element 22 is formed, for example, by folding an elongated rod-like member into a substantially U shape at its central portion, and two elongated plate-like connection terminals 24 are connected to the two ends thereof so as to be substantially parallel to each other. Two cables 30 whose core wires are covered with an insulating resin are bundled substantially parallel so as to be connected to these two connection terminals 24 respectively. A portion of the housing 21 that protrudes outward from the mold 22 (for example, an upper portion) is notched. are connected to the connection terminals 24 of the heating element 22 by welding or the like. A heat-insulating adhesive 26 such as cement or epoxy resin is filled around the connection portion P1 between the core wire 31 of the cable 30 and the connection terminal 24 of the heater 20, and the cable 30 is partly attached to the heater 20 by the heat-insulating adhesive 26. is fixed to the housing 21 of the A cable holding structure 40 for holding the cable 30 is provided at the end of the housing 21 of the heater 20 protruding from the mold 10 , that is, at the notch 25 side.

FIG. 2 shows an enlarged view of a first configuration example of the cable holding structure 40 according to the present embodiment (the same part of the heater 20 in FIG. 1 that protrudes from the mold 10). The cable holding structure 40 includes a cable holding plate 41 made of metal such as stainless steel, a binding band 42 for fixing the cable 30 to the cable holding plate 41, and the like. In the first configuration example, the cable holding plate 41 has an inverted "J"-shaped cross-sectional shape when viewed from the side. A curved portion 41c is provided near the upper end, and a cable holding portion 41b is provided between the base portion 41a and the curved portion 41c. The base portion 41a of the cable holding plate 41 is arranged in a substantially perpendicular direction (vertical direction in normal use) with respect to the drawing direction (horizontal direction in normal use) of the connecting portion of the connection terminal 24 of the heater 20 and the core wire 31 of the cable 30. ) is fixed to the end of the housing 21 by welding or the like. The cable holding portion 41b is also formed substantially perpendicular to the direction in which the connection terminal 24 of the heater 20 and the core wire 31 of the cable 30 are pulled out. A curved portion 41c at the tip (upper end in normal use) of the cable holding plate 41 is curved outward in a semicircular shape on the side opposite to the connection portion between the connection terminal 24 and the core wire 31. A folded portion 41d is formed so as to be continuous and substantially parallel to the cable holding portion 41b. A plurality of, for example, two binding bands 42 are firmly wound around the cable holding portion 41b with the cable 30 sandwiched therebetween. It is fixed to the holding portion 41b.

Since the cable 30 is firmly fixed to the cable holding portion 41b of the cable holding plate 41 by the two binding bands 42 in the cable holding structure 40, the semi-fixed portion of the sealing device is shown by the solid line and the dashed line in FIG. 1 is displaced from the normal use position to the retracted position, the cable 30 is not between the connection terminal 24, the connection part P1 and the fixed part P2 of the frame, but between the cable holding structure 40 and the frame of the bag making apparatus. It bends between it and the fixed part P2. Then, the bending or deformation of the cable is restricted to an inverted "U" shape, and most of the force applied to the cable 30 when the cable 30 is moved is concentrated on the location where it is restrained by the binding band 42, and the core wire of the cable 30 is 31 acts on the cable retaining plate 41 via the binding band 42 and further acts on the housing 21 of the heater 20 via the cable retaining plate 41 . In particular, since the tip of the core wire 31 of the cable 30 and the core wire 31 of the portion held by the cable holding portion 41b form a substantially right angle, if the state where the cable 30 is held by the cable holding plate 41 is regarded as a rigid body, It is considered that the force acting on the portion of the core wire 31 held by the cable holding portion 41 b hardly acts on the tip of the core wire 31 connected to the connection terminal 24 . As a result, a large amount of force does not act on the connecting portion between the connecting terminal 24 of the heater 20 and the core wire 31 of the cable 30, and the core wire 31 is less likely to come off from the connecting terminal 24, and the semi-fixed portion of the sealing device can be moved up and down the number of times. increases. In addition, since the folded portion 41d exists on the outer side of the binding band 42, the possibility that other parts, tools, etc. come into direct contact with the binding band 42 during transportation or assembly work of the heater 20 is reduced. The cable 30 is prevented from being carelessly detached from the cable holding plate 41.例文帳に追加

In general, the cable holding plate 41 is formed by stamping a metal plate by press working and bending the metal plate so that the cross-sectional shape is an inverted "J" shape as described above. However, burrs are formed on the edge portions of the punched sheared surfaces 41e. Further, even if the cable holding plate 41 is deburred, the sheared surface 41e is not uniform and has irregularities. However, by bending the tip of the cable holding plate 41 to form the bent bent portion 41c, the insulating coating 32 of the cable 30 does not come into direct contact with the sheared surface 41e of the cable holding plate 41, thereby semi-fixing the sealing device. Even if the cable 30 bends when the portion 1 is repeatedly moved up and down, the insulating coating 32 of the cable 30 is not damaged by burrs or unevenness of the sheared surface 41 e of the cable holding plate 41 .

FIG. 3 shows a second configuration example of the cable holding structure 40 according to this embodiment. The second configuration example is the same as the first configuration example in that the cable holding plate 41 has an inverted "J" cross-sectional shape when viewed from the side, but the base portion 41a of the cable holding plate 41 is the first configuration. The length of the base portion 41a and the cable holding portion 41b are combined, and the curved portion 41c at the tip of the cable holding plate 41 is curved inward in a semicircular shape toward the connection portion between the connection terminal 24 and the core wire 31. A cable holding portion 41b is formed continuously from the curved portion 41c so as to form a substantially right angle with respect to the direction in which the connection terminal 24 of the heater 20 and the connection portion of the tip of the core wire 31 of the cable 30 are pulled out. In other words, the cable holding plate 41 of the first structural example is turned upside down and welded to the housing 21 of the heater 20, and the portion corresponding to the folded portion 41d is used as the cable holding portion 41b. According to the second configuration example, when the heater 20 is attached to the mold 10, the projection amount of the cable holding structure 40 in the longitudinal direction of the mold 10 and the heater 20 can be reduced. 24, the connection portion of the core wire 31 of the cable 30, and the cable holding portion 41b of the cable holding plate 41 is shortened, and the bending radius when bending the cable 30 at a substantially right angle becomes small. In addition, although the sheared surface 41e at the lower end of the cable holding portion 41b of the cable holding plate 41 directly contacts the insulating coating 32 of the cable 30, the cable 30 is firmly secured by the binding band 42 to the cable holding portion of the cable holding plate 41. As long as it is fixed to 41b, the portion of the cable 30 that is restrained by the cable holding portion 41b does not move, so the insulating coating 32 is not damaged. In addition, since the base portion 41a exists outside the binding band 42, the possibility of other parts or tools coming into direct contact with the binding band 42 during transportation or assembly work of the heater 20 is reduced. As in the first configuration example, the cable 30 is prevented from being easily detached from the cable holding plate 41 .

FIG. 4 shows a third configuration example of the cable holding structure 40 according to this embodiment. The third configuration example is different from the second configuration example in that the cable holding plate 41 has a cross section shaped like an inverted square when viewed from the side. The cable holding portion 41b is curved inward in a V-shape, and forms a predetermined angle (for example, 60 degrees) smaller than a right angle with respect to the direction in which the connecting portion of the connecting terminal 24 of the heater 20 and the core wire 31 of the cable 30 is pulled out. is formed as According to the third configuration example, when the heater 20 is attached to the mold 10, the protrusion amount of the cable holding structure 40 in the longitudinal direction of the mold 10 and the heater 20 can be reduced. Since it is only necessary to bend the cable to a predetermined angle smaller than , the bending radius when bending the cable can be increased. Other configurations and actions are the same as those of the second configuration example.

FIG. 5 shows a fourth configuration example of the cable holding structure 40 according to this embodiment. In the fourth configuration example, the cable holding plate 41 has a shape further modified from the inverted "J"-shaped cross-sectional shape in the side view of the first configuration example, and is formed between the base portion 41a and the curved portion 41c. The cable holding portion 41b is formed so as to form a predetermined angle (for example, 60 degrees) smaller than a right angle with respect to the drawing direction of the connection portion of the connection terminal 24 of the heater 20 and the core wire 31 of the cable 30. , different from the first configuration example. Therefore, as in the third configuration example, it is only necessary to bend the cable 30 at a predetermined angle smaller than a right angle, so that the bending radius when bending the cable can be increased. On the other hand, the curved portion 41c at the tip (upper end in normal use) of the cable holding plate 41 is curved outward in a semicircular shape on the side opposite to the connection portion between the connection terminal 24 and the core wire 31, and furthermore, the curved portion 41c The folded portion 41d is formed so as to be continuous with the base portion 41a and substantially parallel to the base portion 41a, which is the same as the first configuration example. The possibility of direct contact with the binding band 42 by other parts or tools during transportation or assembly of the cable 20 is reduced, and the cable 30 is prevented from being carelessly removed from the cable holding plate 41.例文帳に追加

FIG. 6 shows a fifth configuration example of the cable holding structure 40 according to this embodiment. In the fifth configuration example, the cable holding plate 41 has a substantially "n"-shaped cross-sectional shape in side view, and the curved portion 41c continues to the base portion 41a and is opposite to the connection portion between the connection terminal 24 and the core wire 31. The sides are curved outward in a semicircular shape. Furthermore, a cable holding portion 41b is formed continuously from the curved portion 41c so as to be substantially perpendicular to the direction in which the connection terminal 24 of the heater 20 and the core wire 31 of the cable 30 are pulled out. Further, a folded portion 41d is formed inwardly continuously to the cable holding portion 41b. In this fifth configuration example, since there is no folded portion or base outside the binding band 42, other parts, tools, etc. come into direct contact with the binding band 42 during transportation or assembly work of the heater 20. Potentially, the cable retention structure 40 itself can be made smaller and simpler. In addition, due to the presence of the folded portion 41d, the insulating coating 32 of the cable 30 does not come into direct contact with the sheared surface 41e of the cable holding plate 41, and the insulating coating 32 of the cable 30 does not cause burrs or burrs on the sheared surface 41e of the cable holding plate 41. Damage caused by unevenness or the like is prevented.

FIG. 7 shows a sixth configuration example of the cable holding structure 40 according to this embodiment. In the sixth configuration example, the cable holding plate 41 has a substantially "L"-shaped cross-sectional shape in side view, and the curved portion 41c continues to the base portion 41a and is opposite to the connection portion between the connection terminal 24 and the core wire 31. The sides are curved outward in a quarter circle. Further, a cable holding portion 41b is formed continuously with the curved portion 41c so as to be substantially parallel to the direction in which the connection terminal 24 of the heater 20 and the core wire 31 of the cable 30 are pulled out. Further, a folded portion 41d is formed downward continuously from the cable holding portion 41b. In this sixth configuration example, as in the fifth configuration example, there are no folded portions or base portions on the upper and lower sides of the binding band 42, so that other parts cannot be removed during transportation or assembly of the heater 20. However, the cable holding structure 40 itself can be downsized and simplified. In addition, due to the presence of the folded portion 41d, the insulating coating 32 of the cable 30 does not come into direct contact with the sheared surface 41e of the cable holding plate 41, and the insulating coating 32 of the cable 30 does not cause burrs or burrs on the sheared surface 41e of the cable holding plate 41. Damage caused by unevenness or the like is prevented.

As described above, according to the heater and the cable holding structure suitable for the heater according to the present invention, the cable holding portion of the cable 30 is held while the tip of the core wire 31 of the cable 30 is connected to the connection terminal 24 of the heater (electrical component) 20 . Since the portion of the plate 41 facing the cable holding portion 41b is firmly fixed to the cable holding portion 41b by the binding band 42, even when a large tensile force or bending force is applied to the cable 30, the force applied to the cable 30 is reduced. Most of the force is concentrated on the part bound by the binding band 42 , and the force applied to the core wire 31 of the cable 30 acts on the cable holding plate 41 through the binding band 42 and further to the housing 21 through the cable holding plate 41 . works. Therefore, a large force does not act on the connecting portion P1 between the connection terminal 24 of the heater 20 and the core wire 31 of the cable 30 , and the core wire 31 is less likely to come off from the connection terminal 31 .

The present invention is not limited to each configuration example of the above embodiment, and various modifications and applications are possible. First, the heater 20 according to the present invention is not limited to the heater incorporated in the semi-stationary portion of the sealing device of the bag making apparatus, and may be used in the movable portion of the sealing device or other devices. Further, the use of the cable holding structure 40 according to the present invention is not limited to the heater built into the semi-fixed part of the sealing device of the bag making apparatus, but it is used to supply electric power to various sensors, motors and other electric parts. It can also be used to hold cables that carry control signals. Moreover, the base portion 41 a of the cable holding plate 41 does not necessarily have to be substantially perpendicular to the drawing direction of the connecting portion between the connection terminal 24 of the heater 20 and the tip of the core wire 31 of the cable 30 . It may be an arbitrary angle including substantially parallel to the drawing direction of the connection portion with the tip of the. Furthermore, the number of cables 30 is not limited to two as described above, and may be one or three or more. Furthermore, a plurality of cables 30 may be bundled together with an insulator such as a glass tube.

REFERENCE SIGNS LIST 1 semi-fixed portion of sealing device 10 mold 11 fitting hole 20 heater 21 housing 22 heating element 23 insulator 24 connection terminal 25 notch 26 heat insulating adhesive 30 cable 31 core wire 32 insulation coating 40 cable holding structure 41 cable holding plate 41a base portion 41b cable holding portion 41c curved portion 41d folded portion 41e sheared surface 42 binding band (restraint)

Claims (9)

a heating element, a connection terminal connected to the heating element, a cable having a tip of a core wire connected to the connection terminal for supplying power to the heating element, and a part of the heating element and the cable inside. and a cable retention structure fixed to one end of the housing for retaining another portion of the cable, the heater comprising:
The cable holding structure comprises a cable holding plate for holding the cable and a restraint for fixing the cable to the cable holding plate,
The cable holding plate forms a substantially right angle, a predetermined angle smaller than the right angle, or substantially parallel to the direction in which the base portion fixed to the housing and the connection portion of the connection terminal and the tip of the core wire are pulled out, and the A cable holding portion for holding another portion of the cable by a restraint, and a curved portion formed at a tip opposite to the base portion, wherein at least the cable holding portion and the curved portion are continuous. A heater characterized by: The cable holding portion is formed between the base portion and the curved portion so as to form a substantially right angle with respect to a drawing direction of the connection terminal of the heater and the connection portion of the tip of the core wire of the cable. and a folded portion is formed so as to be curved outward in a semicircular shape on the side opposite to the connecting portion, and to be continuous with the curved portion and substantially parallel to the cable holding portion. Item 1. The heater according to item 1. The curved portion is curved inward in a semicircular shape from one end of the base portion toward the connection portion side of the connecting terminal of the heater and the tip of the core wire of the cable, and continues to the curved portion to hold the cable. 2. The heater according to claim 1, wherein the portion is formed so as to be substantially perpendicular to a direction in which the connecting terminal of the heater and the connecting portion at the end of the core wire of the cable are pulled out. The curved portion is curved inward from one end of the base portion toward the connecting portion side of the connecting terminal of the heater and the tip of the core wire of the cable, and the cable holding portion continues to the curved portion. 2. The heater according to claim 1, wherein the heater is formed so as to form a predetermined angle smaller than a right angle with respect to a direction in which the connection terminal of the heater and the connecting portion at the tip of the core wire of the cable are pulled out. The cable holding portion is formed between the base portion and the curved portion so as to form a predetermined angle smaller than a right angle with respect to a drawing direction of the connection terminal of the heater and the connection portion of the tip of the core wire of the cable. wherein the curved portion is curved outward in a semicircular shape on the side opposite to the connecting portion, and a folded portion is formed so as to be continuous with the curved portion and substantially parallel to the base portion. The heater according to claim 1, wherein The curved portion is continuous with the base portion and curved outward in a semicircular shape on the side opposite to the connecting portion of the connection terminal of the heater and the tip of the core wire of the cable, and is continuously curved with the curved portion. A holding portion is formed so as to be continuous with the curved portion and substantially perpendicular to a drawing direction of the connecting portion of the connection terminal of the heater and the connection portion of the tip of the core wire of the cable, and is continuous with the cable holding portion. 2. A heater according to claim 1, wherein said folded portion is formed inwardly. The curved portion continues to the base portion and is curved outward in a quarter circle on the side opposite to the connection portion of the connection terminal of the heater and the tip of the core wire of the cable. A holding portion is formed continuously with the curved portion so as to be substantially parallel to a drawing direction of the connecting portion of the connection terminal of the heater and the connection portion of the tip of the core wire of the cable, and is continuous with the cable holding portion. 2. A heater according to claim 1, wherein said folded portion is formed inwardly. The housing of the heater is made of metal and has a cylindrical shape with a part of the side wall near one end notched, and the base of the cable holding plate of the cable holding structure is the side wall of the housing. 8. The heater according to any one of claims 1 to 7, wherein a part of the is welded to the housing so as to close the notched end. The heat generating element is formed by folding a long, thin rod-like object into a substantially U shape at its center, and two long, thin plate-like connecting terminals are connected to the two ends thereof so as to be substantially parallel, and the cable includes a core wire. 9. The heater according to any one of claims 1 to 8, wherein two cables each covered with an insulating resin are bundled substantially parallel.

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