JP2018087795A - Manufacturing method of sheath thermocouple, sheath type temperature measuring resistor or sheath type heater, and heater used in the manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method capable of rapidly drying the inside of a sheath, easily downsizing and automizing a device without requiring a large space, and efficiently internally drying a plurality of sheaths, and also provide a heater.SOLUTION: A sheath thermocouple, sheath type temperature measuring resistor or sheath type heater includes two or more metal holding bodies 2A, 2B holding a sheath outer peripheral part 90a, and a current supply unit 3 configured to supply current to the respective metal holding bodies. A manufacturing method of the sheath thermocouple, sheath type temperature measuring resistor or sheath type heater comprises: in the respective holding bodies 2A, 2B, aligning a plurality of holding parts 20A, 20B formed by a concave surface contacting with the sheath outer peripheral, at intervals; between holding parts corresponding to each of the two or more metal holding bodies, holding an outer peripheral part of each sheath; simultaneously holding a plurality of sheaths 90 by the two or more metal holding bodies; supplying current to the respective metal holding bodies 2A, 2B through the current supply unit 3; generating heat by electric resistance of each metal holding body; transferring heat from the respective holding parts 20A, 20B of the respective metal holding bodies to the respective sheath outer peripheral parts 90a; and simultaneously heating and drying the inside of the plurality of sheaths 90.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a manufacturing method of a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater, and a heating device used in the manufacturing method.

  Conventionally, in the manufacture of sheathed thermocouples, sheathed resistance thermometers, and sheathed heaters in which the gap inside the sheath is filled with an insulator, the inside of the sheath is heated and dried, or injected into the proximal end of the sheath Heating and curing furnaces and infrared heaters that contain the entire product are used to heat and cure the sealing resin, and to heat and cure the filling resin in the sleeve that forms the connection between the sheath proximal end and the extension cable. Etc. are used.

  However, in such a heating / drying furnace or an infrared heater such as those that are heated / dried / heat-cured by radiant heat or radiant heat through air or other medium, drying inside the sheath, hardening of the sealing resin at the sheath base end, There is a problem that it takes time to cure the filling resin in the sleeve and the efficiency is low. In particular, the heating and drying furnace requires a space for the entire product, and the size of the apparatus cannot be increased, and automation is difficult.

  On the other hand, the applicant of the present invention first takes in a portion including a region having a predetermined length from the end portion of the sheath partially or partially by electromagnetic induction heating to be taken in between the insulators. A method and a heating / drying apparatus for processing the sheath end after dehumidifying the existing moisture from the open end of the sheath end to the outside have been proposed (see Patent Document 1). However, such a device can be reduced in size, but there is also a problem that a countermeasure against electromagnetic waves is required and the degree of freedom in design is limited.

JP 2014-106107 A

  Therefore, in view of the above-described situation, the present invention is able to more quickly dry the inside of the sheath, cure the sealing resin at the sheath base end, and cure the filling resin in the sleeve. In addition, it is easy to downsize and automate the device regardless of location, and manufacture a sheath thermocouple, sheathed resistance temperature detector, or sheathed heater that can efficiently dry or cure multiple sheaths and sleeves internally. It is in the point which provides the method and the heating apparatus used for this.

The present invention includes the following inventions.
(1) In the manufacture of a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator, a method for heating and drying the inside of the sheath, the outer periphery of the sheath 2 or more metal sandwiching bodies and a current supply portion for passing a current to each metal sandwiching body, and each metal sandwiching body is provided with a sandwiching portion made of a concave surface contacting the outer peripheral portion of the sheath at a predetermined interval. A plurality of the metal sheaths are arranged side by side, and the outer peripheral portion of the sheath is sandwiched between the corresponding sandwiching portions of the two or more metal sandwiching bodies, so that the plurality of sheaths are sandwiched simultaneously by the two or more metal sandwiching bodies. A current is supplied to the sandwiching body through the current supply unit, heat is generated by the electrical resistance of each metal sandwiching body, heat is transferred from each sandwiching portion of each metal sandwiching body to the outer periphery of each sheath, and heating and drying are simultaneously performed in a plurality of sheaths. It is characterized by letting A method for manufacturing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater.

(2) In manufacturing a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator, the sealing resin injected into the sheath base end is heated and cured. In this method, two or more metal sandwiching bodies sandwiching the outer peripheral portion of the sheath proximal end portion and a current supply portion for passing current to each metal sandwiching body are provided, and each metal sandwiching body is provided with a sheath proximal end portion. By arranging a plurality of holding parts made of concave surfaces in contact with the outer peripheral part at predetermined intervals, and holding the outer peripheral part of the sheath base end part between the corresponding holding parts of two or more metal holding bodies, respectively. A plurality of sheath base end portions are simultaneously sandwiched by two or more metal clamps, a current is supplied to each metal clamp through a current supply unit, and heat is generated by electric resistance of each metal clamp, and each metal clamp is sandwiched. Heat transfer from the sheath to the outer periphery of each sheath base end A method for manufacturing a sheath thermocouple, a sheathed resistance temperature detector, or a sheathed heater, wherein the sealing resin in the plurality of sheath base end portions is heated and cured simultaneously.
(3) Before sealing resin is injected into the sheath base end, the sheath base end is heated by sandwiching the plurality of sheath base ends with the two or more metal sandwiching bodies in advance. The method for producing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater according to (2), wherein the sealing resin is injected into each of the above.

(4) In the manufacture of a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator, in the sleeve constituting the connecting portion between the sheath proximal end and the extension cable In the method of heating and curing the filled resin, two or more metal sandwiching bodies sandwiching the outer peripheral portion of the sleeve, and a current supply portion for passing a current to each metal sandwiching body are provided, A plurality of sandwiching portions made of concave surfaces that come into contact with the outer peripheral portion of the sleeve are arranged in parallel at predetermined intervals, and the outer peripheral portion of the sleeve is sandwiched between the corresponding sandwiching portions of two or more metal sandwiching bodies, respectively. A plurality of sleeves are sandwiched simultaneously by two or more metal clamps, a current is supplied to each metal clamp through a current supply unit, and heat is generated by electric resistance of each metal clamp, and each sleeve from each clamp unit of each metal clamp of A method for manufacturing a sheath thermocouple, a sheathed resistance temperature detector, or a sheathed heater, wherein heat is transferred to the outer peripheral portion, and the filled resin in a plurality of sleeves is simultaneously heated and cured.
(5) Before the filling resin is filled in the sleeve, the outer peripheral portions of the plurality of sleeves are sandwiched and heated by the two or more metal sandwiching bodies in advance, and each of the heated sleeves is filled with the filling resin. The method for producing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater according to (4), which is filled with resin.

  (6) The method for manufacturing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater according to any one of (1) to (5), wherein an electrical insulating layer is provided on the concave surface of the sandwiching portion.

  (7) The electric supply path according to any one of (1) to (6), wherein the electric supply path is provided so as to flow a current from one end to the other end in the arrangement direction of the holding portions in each metal holding body. A method for manufacturing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater.

  (8) A heating device for heating and drying the inside of a sheath, which is used in the manufacture of a sheath thermocouple, a sheath type resistance temperature detector, or a sheath type heater in which a gap inside the sheath is filled with an insulator, 2 or more metal sandwiching bodies sandwiching the outer peripheral portion of each of the metal sandwiching body, and a current supply portion for passing a current to each metal sandwiching body, each metal sandwiching body is formed of a concave portion that contacts the outer peripheral portion of the sheath, Plurally arranged in parallel at predetermined intervals, the sheath outer peripheral portion is sandwiched between the corresponding sandwiching portions of two or more metal sandwiching bodies, and a current is supplied to each metal sandwiching body through the current supply unit. A heating device in which each metal sandwich body generates heat due to electric resistance and is transferred from each sandwich portion of each metal sandwich body to the outer peripheral portion of each sheath, and the plurality of sheaths are heated and dried simultaneously.

  (9) Used to manufacture a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator, heating and sealing resin injected into the sheath base end A heating device for curing, comprising: two or more metal sandwiching bodies sandwiching the outer peripheral portion of the sheath base end portion; and a current supply section for passing a current to each metal sandwiching body, and each metal sandwiching body includes a sheath base A plurality of holding portions made of concave surfaces that contact the outer peripheral portion of the end portion are arranged in parallel at predetermined intervals, and the outer peripheral portion of the sheath base end portion is respectively between the corresponding holding portions of the two or more metal holding bodies. In addition, each metal clamp generates heat due to electric resistance and is transmitted from each clamp of each metal clamp to the outer periphery of each sheath base end. Heated, the sealing resin in the sheath base end is heated simultaneously Cured by the heating device.

  (10) Used in the manufacture of a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator, and constitutes a connecting portion between the sheath proximal end and the extension cable A heating device that heats and cures a filling resin in a sleeve, and includes two or more metal sandwiching bodies that sandwich the outer periphery of the sleeve, and a current supply unit that supplies current to each metal sandwiching body. A plurality of holding parts made of concave surfaces that come into contact with the outer peripheral part of the sleeve are juxtaposed on the body at predetermined intervals, and the outer peripheral part of the sleeve is held between the corresponding holding parts of two or more metal holding bodies. In addition, by passing a current through the current supply unit to each metal sandwich body, each metal sandwich body generates heat due to electric resistance, and heat is transferred from each sandwich portion of each metal sandwich body to the outer peripheral portion of each sleeve. Filling tree in sleeve Heating device but which is heated and cured at the same time.

  According to the present invention as described above, since the self-heating metal sandwich body is in direct contact with the sheath or sleeve to heat it, radiant heat, radiant heat, etc. through air or other mediators as in a normal drying device or heating device. Compared to those that are heat-dried / cured by heating, the inside of the sheath can be dried more quickly, the sealing resin at the sheath base end can be cured, and the filling resin in the sleeve can be cured, and the device can be used anywhere. Therefore, it becomes easy to downsize and automate a plurality of sheaths and sleeves, and it is possible to efficiently dry or harden a plurality of sheaths and sleeves.

  In particular, when the sealing resin or the filling resin is cured, since the resin is directly heated, the resin curing temperature, the curing rate, and the like can be controlled more accurately, and a higher quality sealing or connection can be performed. Become. Further, when the sealing resin is injected into the sheath base end portion or filled with the filling resin into the sleeve, the sheath base end portion or the sleeve is sandwiched by the metal sandwiching body in advance and heated to be sealed. The injection / filling of the resin and the filling resin becomes smoother, and the heating at the time of filling / filling is not heated by radiant heat or radiant heat through the air or other media as described above, but from the metal sandwiched body. Since heat is transferred by direct contact with the sheath base end or sleeve, the resin injection / filling operation in the heated state can be easily performed without being affected by heat, and automation can be easily realized. It becomes.

  Further, the current flows along the arrangement direction of the plurality of sandwiching portions of each metal sandwiching body, so that each sandwiching portion generates heat uniformly, and the plurality of sheaths or sleeves sandwiched by these sandwiching portions are also heated uniformly. Dried and quality (degree of drying / curing of resin) variation is prevented. That is, the drying / curing treatment can be performed quickly and without variation.

The perspective view which shows the heating apparatus which concerns on 1st Embodiment of this invention. The perspective view which shows the state which spaced apart the metal clamping body of the heating apparatus similarly. (A) is a top view which similarly shows a heating apparatus, (b) is also a front view. The cross-sectional view which similarly shows a heating apparatus. Explanatory drawing which similarly shows the manufacturing method which heats and dries the inside of a sheath using a heating apparatus. Explanatory drawing which shows a mode that the sheath outer peripheral part is similarly clamped and heated with a heating apparatus. Explanatory drawing which shows the manufacturing method which heats and hardens sealing resin of a sheath base end part using the heating apparatus which concerns on 2nd Embodiment of this invention. Explanatory drawing which shows a mode that the sheath base end part is similarly clamped and heated with a heating apparatus. Explanatory drawing which similarly shows the modification of 2nd Embodiment. Explanatory drawing which shows the manufacturing method which heats and hardens the filling resin in the sleeve for a connection provided in the sheath base end side using the heating apparatus which concerns on 3rd Embodiment of this invention. Explanatory drawing which shows a mode that the sleeve is similarly clamped and heated with a heating apparatus. Explanatory drawing which similarly shows the modification of 3rd Embodiment.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, based on FIGS. 1-6, 1st Embodiment of this invention is described.

  The heating device 1 according to this embodiment heats and dries the inside of a sheath in the manufacturing process of a sheath thermocouple, a sheathed resistance temperature detector, or a sheathed heater in which a gap inside the sheath is filled with an insulator. It is a heating device. Specifically, as shown in FIGS. 1 to 4, two or more metal sandwiching bodies 2A and 2B sandwiching the outer periphery of the sheath, and a current supply unit 3 for passing a current to each of the metal sandwiching bodies 2A and 2B are provided. I have.

  Each of the metal sandwiching bodies 2A / 2B has a plurality of sandwiching portions 20A,... / 20B,. Has been. In the present embodiment, each sandwiched portion 20A, 20B is a substantially semicircular concave curved surface in plan view (seeing from the extending direction of the sandwiched portion, that is, the axial direction of the sheath to be gripped) in close contact with the sheath outer peripheral surface. Of course, the present invention is not limited to this, and it may of course be a triangle, a square, a polygon, an irregular shape, or a combination thereof in plan view.

  As shown in FIGS. 5 and 6, each metal sandwiching body 2 </ b> A in a state where the outer peripheral portion 90 a of the sheath 90 is sandwiched between the corresponding sandwiching portions 20 </ b> A and 20 </ b> B of the metal sandwiching bodies 2 </ b> A and 2 </ b> B. , 2B through the current supply part 3, each metal sandwiching body 2A, 2B generates heat due to electrical resistance, and the heat is transferred from each sandwiching part 20A, 20B to the outer peripheral part 90a of each sheath. The inside of the sheath 90 is simultaneously heated and dried. The amount of current is set so that the amount of heat generated is suitable for drying.

  According to the present embodiment, since the metal sandwiching bodies 2A and 2B that self-heat are heated directly in contact with the sheath 90, they are heated by radiant heat or radiant heat through air or other mediators as in a normal drying device. As compared with the above, the inside of the sheath can be dried more quickly, and the apparatus can be easily downsized and automated regardless of the location, and the plurality of sheaths 90 can be efficiently dried inside.

  In this embodiment, as shown in FIGS. 5 and 6, a known sheath thermocouple 9 in which thermocouple strands 91 and 91 are housed in a metal sheath 90 and an inorganic insulator 92 such as magnesium oxide is filled in a gap. In addition to such a sheath thermocouple, a sheath type resistance temperature detector or a sheath type heater (micro heater, sheathed heater, It can be used in the same manner for the drying process in the sheath of a cartridge heater or other known sheath type heater.

  Further, in this embodiment, as shown in FIGS. 5 and 6, the sheath tip is already sealed, and the base end side from which the thermocouple strand extends is opened, before the base end side processing. Although used in the process of heating and drying the inside of the sheath in a state, the present invention is not limited to such a use mode.

  That is, the sheath thermocouple, the sheathed resistance temperature detector, and the sheathed heater are usually used for sealing processing on the distal end side of the sheath, sealing processing on the proximal end side of the sheath, or processing of a connecting portion with other cables. The entire sheath is placed in a heating / drying oven for a long time in advance to perform the heating / drying process. The present invention can be suitably used for the prior heating / drying treatment of each processing step conventionally performed.

  The metal sandwiching bodies 2A and 2B are made of an appropriate metal such as aluminum or stainless steel, and are both plate-shaped in the present embodiment, but may have other shapes. Moreover, although comprised with two metal clamping bodies 2A and 2B, you may comprise by three or more, for example, it is set as a three-sheet structure, and it is 2nd on both surfaces of the plate-shaped metal clamping body located in the middle, respectively. The third metal sandwiching body may be disposed, and the opposing surfaces, particularly those located in the middle, may be provided with a plurality of sandwiching portions made of concave surfaces similar to the above on both surfaces. A plurality of metal sandwiching bodies may be provided in the longitudinal direction.

  The metal sandwiching bodies 2A and 2B of the present embodiment are obtained by drilling a plurality of parallel through holes with a circular cross section in a row on one metal flat plate by drilling or the like, and cutting along a plane passing through the central axis of each through hole. It is what was done. Recessed sandwiching portions 20A,... / 20B,... Of the sheaths of the respective metal sandwiching bodies 2A / 2B are formed by the inner peripheral surfaces of the respective through holes that are halved by this cutting. The metal sandwiching bodies 2A / 2B obtained in this way can easily have sufficient strength that will not be deformed by the force or heat when sandwiching the outer periphery of the sheath.

  In addition to this, it is of course possible to construct a concave surface formed by bending a flat plate into a corrugated plate shape, but the deformation can be avoided, a stable contact state with the outer peripheral surface of the sheath, and heat transfer efficiency. It is more preferable to obtain the half of the through hole as in this embodiment. The cross-sectional shapes and dimensions of the metal sandwiching bodies 2A and 2B are set so that sufficient heating is performed by electric resistance and the above-described sufficient strength can be obtained. The dimensions of the concave surfaces of the sandwiching portions 20A and 20B are as follows: It can be determined as appropriate according to the outer diameter of the sheath sandwiched so as to be surely in contact with the outer peripheral surface of the sheath.

  Further, it is not necessary for the metal sandwiching bodies 2A and 2B to be entirely made of a metal material except for an insulating layer 4 described later. For example, the holding surface side including the holding portions 20A and 20B may be formed of a non-metallic member made of a material such as a non-metallic and good heat conductive synthetic resin and combined with a metal main body member. . According to this, the insulating layer 4 can be omitted. In this case, the metal main body member generates heat, and this heat is transmitted to the non-metallic member and further transferred to the sheath or the like.

  Electrode portions 21A / 21B to which the terminals 30A / 30B of the current supply unit 3 are connected are provided at the ends of the metal sandwiching bodies 2A / 2B on one end side in the longitudinal direction facing each other. The electrode portions 21A and 21B are made of a plate-like metal member provided so as to protrude on the outer surface opposite to the facing surface of the metal sandwiching bodies 2A and 2B so as not to be electrically connected to each other. A screw hole 21a for fixing the terminals 30A / 30B is formed.

  In addition, electrical contact portions 22A and 22B that are in contact with each other in a closed state that sandwich the outer periphery of the sheath and are electrically connected to the ends of the metal sandwiching bodies 2A / 2B opposite to each other in the longitudinal direction. Are provided on opposite surfaces. In addition, the metal sandwiching bodies 2A and 2B are provided with the insulating layer 4 on the entire surface excluding the electrode portions 21A and 21B and the electrical contact portions 22A and 22B.

  Thus, in the closed state, the metal sandwiching bodies 2A and 2B of the present embodiment are connected in series through the electrical contact portions 22A and 22B between the electrode portions 21A and 21B, and the current supplied from the terminal 30A (30B). The metal sandwiching body 2A (2B) flows from one end side to the other end side, is folded back by the electrical contact portions 22A and 22B, and the metal sandwiching body 2B (2A) flows from the other end side to the one end side, so that the terminal 30B (30A A series circuit returning to) is configured.

  In addition, instead of providing the electrical contact portions 22A and 22B on the other end side, an electrode portion similar to the one end side may be provided to form a parallel circuit, or a combination of series and parallel may be used, or the metal sandwiching body 2A, 2B may be a separate circuit. Further, in the present embodiment, the electric contact portions of the metal sandwiching bodies 2A and 2B are abutting surfaces that abut against each other, but may be connected by wiring or other structures.

  The insulating layer 4 is preferably provided by baking and painting ceramic, for example. In the present embodiment, the gap s1 is set to be maintained so that only the electrical contact portions 22A and 22B are in direct contact with the sheath outer peripheral portion 90a being sandwiched.

  By providing the gap s1, the sheath outer peripheral portion 90a can be firmly held between the holding portions 20A and 20B even if there is a slight dimensional error or deviation of the forming position, and the metal can be held by other than the electrical contact portions 22A and 22B. The insulation between the bodies 2A and 2B is made more reliable. In the case where the gap s1 is set as described above, the insulating layer 4 can of course be only the sandwiching portions 20A and 20B that are in contact with the metal sheath.

  In the present embodiment, the metal sandwiching body 2B is fixed by the support member 50, and the other metal sandwiching body 2A is supported by a cylinder 51 such as hydraulic pressure so as to be movable in a direction of contacting / separating from the metal sandwiching body 2B. ing. Then, with the sheath holding member (not shown) positioned in the respective sandwiching portions 20B of the fixed-side metal sandwiching body 2B, the moving-side metal sandwiching body 2A is moved in a direction in contact with the metal sandwiching body 2B. Each sheath outer peripheral portion 90a is sandwiched by the corresponding sandwiching portions 20A, and the above-described series circuit is formed by bringing the electrical contact portions 22A and 22B into contact with each other.

  In the present embodiment, the metal sandwiching bodies 2A and 2B are divided and supported independently by the cylinder 51 and the support member 50, respectively, but are connected by a hinge on one end side or the other end side and integrated so as to be freely opened and closed. May be. Further, in this embodiment, the sheath is vertically held and held in the heating device 1, but may be held in a horizontal posture. Each sheath is positioned on the metal sandwiching body 2B by, for example, supporting a plurality of sheaths arranged at the same interval as the sandwiching portion 20B with a robot hand or other jig (not shown) and moving the sheath to the metal sandwiching body 2B as it is. Each sheath may be positioned at each sandwiching portion 20B of the metal sandwiching body 2B.

  The current supply unit 3 is a power source provided at the end of a conductor 32 provided with terminals 30A, 30B and mounting screws 31, terminals 30A, 30B connected to the electrode units 21A, 21B described above of the metal sandwiching bodies 2A, 2B. 33, a switch 34, a control unit (not shown) for controlling the amount of current, the switch 34, and the like. In the present embodiment, an example in which an AC power source that supplies an AC current is provided as the power source 33 is shown, but a DC power source that supplies a DC current may be used.

  As in the present embodiment, the current flows along the arrangement direction of the plurality of sandwiching portions 20A (20B) of the metal sandwiching bodies 2A and 2B, that is, the longitudinal direction in this example, so that each sandwiching portion 20A (20B) Heat is generated uniformly, and therefore the plurality of sheaths 90 sandwiched between the sandwiching portions 20A (20B) are also heated and dried uniformly to prevent variations in quality (the degree of drying). That is, the drying process can be performed quickly and without variation.

  The heating / drying process in the sheath using the heating device 1 may be performed only by the heating device 1 or in a state where a plurality of sheath thermocouples 9 are held by the heating device 1 in a conventional heating / drying furnace. After being put in and dried at a high temperature by a heating / drying furnace, the plurality of sheathed thermocouples 9 are taken out while being held by the heating device 1 and are dried by heating with the heating device 1 until the end portion is processed. A method of preventing intrusion is preferred. In this example, only one heating device 1 is heated while sandwiching the sheath proximal end side. However, two or more heating devices 1 may be prepared and a plurality of regions along the longitudinal direction of the sheath may be sandwiched. . If sandwiched between two or more, the amount of current flowing per one can be reduced, and safety can be further improved.

  As described above, in the “heating / drying” of the present invention, not only the moisture is discharged from the inside of the sheath, but also after the moisture is discharged in a conventional heating / drying furnace, it is taken out from the heating / drying furnace and the end portion or the like. This also includes preventing moisture from entering the sheath again before the processing is performed.

  Next, a second embodiment of the present invention will be described based on FIGS.

  In the manufacturing process of the sheath thermocouple, the sheathed resistance temperature detector, or the sheathed heater in which the gap inside the sheath is filled with the insulator, the heating device 1 according to the present embodiment is particularly suitable for the sheath base end 90b. It is a heating device for heating and curing the injected sealing resin r1. About the structure of the heating apparatus 1, its modification, etc., since it is the same as what was demonstrated in the above-mentioned 1st Embodiment, the same code | symbol is attached | subjected to the same structure and the description is abbreviate | omitted.

  In the present embodiment, as shown in FIGS. 7 and 8, the outer peripheral portion of the sheath base end portion 90b is sandwiched between the corresponding sandwiching portions 20A and 20B of the metal sandwiching bodies 2A and 2B of the heating device 1, respectively. Let Then, by passing a current through each of the metal sandwiching bodies 2A and 2B through the current supply unit 3, each of the metal sandwiching bodies 2A and 2B generates heat due to electric resistance, and the heat is transmitted from each of the sandwiching sections 20A and 20B to the sheath base end portion 90b. The sealing resin that is directly transferred to and injected into each sheath base end portion 90b is simultaneously heated and cured.

  As the sealing resin, a thermosetting resin such as an epoxy resin resistant to heat is used. The amount of current of the heating device 1 is set so as to be a calorific value suitable for curing the sealing resin r1. According to the present invention, the self-heating metal sandwiching bodies 2A and 2B directly heat the sheath base end portion 90b, so that it is heated by radiant heat, radiant heat or the like through air or other mediators as in a normal heating device. In comparison, the sealing resin r1 can be cured more quickly, and the apparatus can be easily downsized and automated regardless of the location, and the temperature and curing speed for curing the sealing resin because it is directly heated. Can be controlled more accurately, and sealing with better quality can be performed.

  Further, as in the first embodiment, the current flows along the arrangement direction of the plurality of sandwiching portions 20A (20B) of each metal sandwiching body 2A, 2B, so that each sandwiching portion 20A (20B) generates heat uniformly, Therefore, the sealing resins r1 of the plurality of sheath base end portions 90b sandwiched between the sandwiching portions 20A (20B) are also uniformly heated and cured with each other, and quality variations are prevented.

  In the present embodiment, an example used for manufacturing the sheath thermocouple 9 is given. However, in addition to this, a sheath-type resistance thermometer or a sheath-type heater (microheater) in which an insulating material is filled in a gap inside the sheath. , A sheath heater, a cartridge heater, and other known sheath type heaters) can be used in the same manner for a treatment using a sealing resin at the base end portion of the sheath.

  More specifically, as shown in FIG. 7, the inorganic insulator 92 is dug in a state where the base end portion 90b of each sheath is supported by the metal sandwiching bodies 2A and 2B of the heating device 1, and the sealing resin r1 is filled. It is preferable. That is, using the heating device 1 as a sheath supporting jig, the inorganic insulator 92 can be dug or filled with the sealing resin r1. In this example, as shown in FIG. 7 (b), before injecting the sealing resin r1 into the sheath base end portion 90b, a current is passed in advance to the metal sandwiching bodies 2A and 2B of the heating device 1 so that the sheath base end portion Although 90b is heated so that the sealing resin can be filled smoothly, it is of course possible to heat and cure after injection or during injection.

  In the example of FIG. 7, the heating is performed immediately before the sealing resin r <b> 1 is injected, but the heating is performed before the inorganic insulator at the sheath base end is dug until the sealing with the sealing resin is completed. In the meantime, it is also preferable to prevent moisture from entering. In that case, at the stage of resin injection shown in FIG. 7B, the amount of current is changed from a value that generates heat suitable for preventing moisture intrusion to a value suitable for injection and curing of the sealing resin. Change it. Of course, the inorganic insulator at the base end portion of each sheath can be sandwiched in the heating device 1 after being dug up first, or can be sandwiched in the heating device 1 after being filled with the sealing resin.

  Further, as shown in FIG. 9A, after the heating and drying process in the sheath described in the first embodiment is performed, only the amount of current is appropriately adjusted while being heated, and FIGS. It is also preferable to continuously dig up the inorganic insulator, fill the sealing resin, and cure as described above.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  The heating device 1C according to the present embodiment is particularly extended with the sheath proximal end in the manufacturing process of a sheath thermocouple, a sheathed resistance temperature detector, or a sheathed heater in which a gap inside the sheath is filled with an insulator. This is a heating device for heating and curing the filled resin r2 in the sleeve 60 that constitutes the connection portion with the cable 7. Since the configuration of the heating device 1C, its modification, and the like are basically the same as those of the heating device 1 described in the first embodiment, the same structure is denoted by the same reference numeral, and the description thereof is omitted.

  In the present embodiment, as shown in FIGS. 10 and 11, the outer peripheral portion of the sleeve 60 is sandwiched between the corresponding sandwiching portions 20A and 20B of the metal sandwiching bodies 2A and 2B of the heating device 1C. The size of the concave surface of each clamping part 20A, 20B can be appropriately determined according to the outer diameter of the sleeve to be clamped so as to contact the outer peripheral surface of the sleeve 60 with certainty.

  Then, by passing a current through each of the metal sandwiching bodies 2A and 2B through the current supply unit 3C, each of the metal sandwiching bodies 2A and 2B generates heat due to electrical resistance, and the heat is directly applied to each sleeve 60 from each of the sandwiching sections 20A and 20B. The filled resin r2 that has been transferred and filled in each sleeve 60 is simultaneously heated and cured. As the filling resin r2, a thermosetting resin such as an epoxy resin resistant to heat is used as in the sealing resin r1 of the second embodiment.

  The current amount of the heating device 1C is set so as to be a calorific value suitable for curing the filled resin r2. Similar to the second embodiment, according to the present invention, since the metal sandwiching bodies 2A and 2B that generate heat directly heat the sleeve 60, it is possible to radiate heat or radiant heat through air or other mediators as in a normal heating device. Compared to heating, the filling resin r2 can be cured more quickly, and it is easy to downsize and automate the device regardless of the location, and the temperature and curing to cure the filling resin because of direct heating. Speed and the like can be controlled more accurately, and a better quality sheath-extension cable connection can be made.

  Similarly to the first and second embodiments, the current flows along the arrangement direction of the plurality of sandwiching portions 20A (20B) of each of the metal sandwiching bodies 2A and 2B, so that each sandwiching portion 20A (20B) is made uniform. Therefore, the filling resins r2 of the plurality of sleeves 60 sandwiched between the sandwiching portions 20A (20B) are also heated and cured uniformly to prevent variation in quality.

  In the present embodiment, an example used for manufacturing the sheath thermocouple 9 is given. However, in addition to this, a sheath-type resistance thermometer or a sheath-type heater (microheater) in which an insulating material is filled in a gap inside the sheath. , Sheath heater, cartridge heater, and other known sheath type heaters) can be used in the same manner for connection processing with the extension cable on the sheath base end side.

  More specifically, first, the thermocouple element 91 on the sheath side and the lead wire 71 on the extension cable side are connected, the sleeve 60 is positioned so as to cover the connection portion, and one end side (sheath side) of the sleeve 60 is positioned. After the end portion is crimped to the outer peripheral portion of the sheath base end portion 90b, the outer peripheral portion of the sleeve 60 is supported by the metal sandwiching bodies 2A and 2B of the heating device 1C as shown in FIG. Then, the filling resin r <b> 2 is filled into the sleeve 60 from the gap on the other end side of the sleeve 60. That is, the filling resin r2 is filled using the heating device 1C as a sleeve supporting jig.

  In this example, as shown in FIG. 10 (a), before the filling resin r2 is filled into the sleeve 60, the sleeve 60 is heated by supplying an electric current to the metal sandwiching bodies 2A and 2B of the heating device 1C in advance. The filling resin can be filled smoothly, but it is of course possible to heat and cure after filling or during filling.

  Moreover, it is also preferable to perform the said crimping stop in the state which supported the sleeve 60 before crimping with the metal clamping bodies 2A and 2B. It is of course possible to heat the sleeve by sandwiching the sleeve in the heating device 1C after separately performing the above-described crimping and sealing resin filling.

  Further, as shown in FIGS. 12A to 12B, after the sheath base end portion 90 b is sealed by the heating device 1 described in the second embodiment, the position of the heating device 1 is changed to the connection sleeve 60. In this state, the heating device 1 is used as a sheath support jig, and the thermocouple element 91 on the sheath side and the lead wire 71 on the extension cable side are connected in this state. A form of connection processing can also be performed.

  Specifically, as shown in FIG. 12C, in the state where the sleeve 60 is sandwiched by using the heating device 1C of the present embodiment as a jig for supporting the sleeve 60, the sleeve 60 is connected to the wire 91 and the lead. As shown in FIGS. 12 (d) to 12 (f), the sleeve 60 is supported while being moved to a position covering the connecting portion of the wire 71, and as shown in FIGS. 12 (d) to 12 (f), filling with the filling resin r2, heating / curing. Processing can be performed.

  In this case, operations such as movement of the heating devices 1 and 1C may be performed manually or may be automated. Further, the caulking process of the sleeve 60 and the filling of the filling resin can also be performed manually or can be automated.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1,1C Heating device 2A, 2B Metal clamping body 3, 3C Current supply part 4 Insulation layer 7 Extension cable 9 Sheath thermocouple 20A, 20B Holding part 21A, 21B Electrode part 21a Screw hole 22A, 22B Electrical contact part 30A, 30B Terminal 31 Mounting screw 32 Conductor 33 Power supply 34 Switch 50 Support member 51 Cylinder 60 Sleeve 60a Outer peripheral part 71 Lead wire 90 Sheath 90a Outer peripheral part 90b Base end part 91 Thermocouple element 92 Inorganic insulator r1 Sealing resin r2 Filling resin s1 Crevice

Claims (10)

In the production of a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator, a method of heating and drying the inside of the sheath,
Two or more metal clamps sandwiching the outer periphery of the sheath;
A current supply section for supplying current to each metal sandwich body;
A plurality of sandwiched portions made of concave surfaces that contact the outer peripheral portion of the sheath are arranged in parallel at predetermined intervals on each metal sandwiched body,
By sandwiching the outer peripheral portion of the sheath between the corresponding sandwiching portions of the two or more metal sandwiching bodies, the plurality of sheaths are sandwiched simultaneously by the two or more metal sandwiching bodies,
A current is supplied to each metal sandwich through the current supply unit, and heat is generated by the electrical resistance of each metal sandwich,
Heat is transferred from each sandwiched portion of each metal sandwiched body to the outer periphery of each sheath,
A method for manufacturing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater, wherein a plurality of sheaths are simultaneously heated and dried. In the manufacture of a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator, the sealing resin injected into the sheath base end is heated and cured. And
Two or more metal clamps sandwiching the outer periphery of the sheath base end; and
A current supply section for supplying current to each metal sandwich body;
A plurality of sandwiching portions made of concave surfaces that contact the outer peripheral portion of the sheath base end portion are juxtaposed at predetermined intervals on each metal sandwiching body,
By sandwiching the outer peripheral portion of the sheath base end portion between the corresponding sandwiching portions of each of the two or more metal sandwich bodies, the plurality of sheath base end portions are sandwiched simultaneously by the two or more metal sandwich bodies,
A current is supplied to each metal sandwich through the current supply unit, and heat is generated by the electrical resistance of each metal sandwich,
Heat is transferred from each sandwiched portion of each metal sandwiched body to the outer periphery of each sheath base end,
A method for manufacturing a sheath thermocouple, a sheath type resistance temperature detector, or a sheath type heater, wherein sealing resin in a plurality of sheath base end portions is simultaneously heated and cured.   Before the sealing resin is injected into the sheath base end portion, the sheath base end portions are sandwiched and heated by the two or more metal sandwiching bodies in advance, and the heated sheath base end portion is The method for manufacturing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater according to claim 2, wherein each of the sealing resins is injected. Filling resin in the sleeve that forms the connecting portion between the sheath proximal end and the extension cable in the manufacture of a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator Is a method of heating and curing,
Two or more metal clamps sandwiching the outer periphery of the sleeve;
A current supply section for supplying current to each metal sandwich body;
A plurality of sandwiching portions made of concave surfaces that contact the outer peripheral portion of the sleeve are arranged in parallel at predetermined intervals on each metal sandwiching body,
By sandwiching the outer peripheral part of the sleeve between the corresponding clamping parts of each of the two or more metal clamping bodies, the plurality of sleeves are clamped simultaneously by the two or more metal clamping bodies,
A current is supplied to each metal sandwich through the current supply unit, and heat is generated by the electrical resistance of each metal sandwich,
Heat is transferred from each sandwiched portion of each metal sandwiched body to the outer periphery of each sleeve,
A method for manufacturing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater, wherein the filled resin in a plurality of sleeves is simultaneously heated and cured.   Before the filling resin is filled in the sleeve, the outer peripheral portions of the plurality of sleeves are sandwiched and heated by the two or more metal sandwiching bodies in advance, and the filling resin is filled in each of the heated sleeves. A method for manufacturing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater according to claim 4.   The method for manufacturing a sheath thermocouple, a sheathed resistance temperature detector, or a sheathed heater according to any one of claims 1 to 5, wherein an electrically insulating layer is provided on the concave surface of the sandwiching portion.   The sheath thermocouple according to any one of claims 1 to 6, wherein the electric supply path is provided so as to flow a current from one end to the other end in the arrangement direction of the holding portions in each metal holding body. , Sheath type resistance temperature detector, or sheath type heater manufacturing method. A heating device for heating and drying the inside of a sheath, which is used for manufacturing a sheathed thermocouple, a sheathed resistance temperature detector, or a sheathed heater in which a gap inside the sheath is filled with an insulator,
Two or more metal clamps sandwiching the outer periphery of the sheath;
A current supply section for supplying current to each metal sandwich body,
A plurality of sandwiching portions made of concave surfaces that come into contact with the outer peripheral portion of the sheath are arranged in parallel with each metal sandwiching body at a predetermined interval,
By sandwiching the outer periphery of the sheath between the corresponding sandwiching portions of each of the two or more metal sandwiches, and by causing a current to flow through each metal sandwicher through the current supply unit, each metal sandwicher generates heat due to electrical resistance, A heating device in which heat is transferred from each sandwiched portion of each metal sandwiched body to the outer peripheral portion of each sheath, and the plurality of sheaths are heated and dried simultaneously. Heating that heats and hardens the sealing resin injected into the sheath base end, used in the manufacture of sheathed thermocouples, sheathed resistance thermometers, or sheathed heaters, where the gap inside the sheath is filled with an insulator A device,
Two or more metal clamps sandwiching the outer periphery of the sheath base end; and
A current supply section for supplying current to each metal sandwich body,
A plurality of sandwiching portions made of concave surfaces that contact the outer peripheral portion of the sheath base end portion are arranged in parallel at predetermined intervals on each metal sandwiching body,
By sandwiching the outer peripheral portion of the sheath base end portion between the corresponding sandwiching portions of the two or more metal sandwiching bodies, and by causing a current to flow through each metal sandwiching body through the current supply unit, each metal sandwiching body has an electric resistance. The heat generating apparatus generates heat by heat and is transferred from each sandwiching portion of each metal sandwiching body to the outer peripheral portion of each sheath base end portion, and the sealing resin in the plurality of sheath base end portions is simultaneously heated and cured. Used in the manufacture of a sheathed thermocouple, sheathed resistance temperature detector, or sheathed heater in which a gap inside the sheath is filled with an insulator, and in the sleeve that forms the connection between the sheath proximal end and the extension cable A heating device for heating and curing a filled resin,
Two or more metal clamps sandwiching the outer periphery of the sleeve;
A current supply section for supplying current to each metal sandwich body,
A plurality of sandwiching portions made of concave surfaces that come into contact with the outer peripheral portion of the sleeve are arranged in parallel at predetermined intervals on each metal sandwiching body,
By sandwiching the outer periphery of the sleeve between the corresponding clamping parts of each of the two or more metal clamping bodies, and passing a current through the current supply part to each metal clamping body, each metal clamping body generates heat due to electrical resistance, A heating device in which heat is transferred from each sandwiched portion of each metal sandwiched body to the outer peripheral portion of each sleeve, and the filled resin in the plurality of sleeves is simultaneously heated and cured.

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