CN102410909A - Detecting Sensor And Method Of Making The Same - Google Patents
Detecting Sensor And Method Of Making The Same Download PDFInfo
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- CN102410909A CN102410909A CN2011102227035A CN201110222703A CN102410909A CN 102410909 A CN102410909 A CN 102410909A CN 2011102227035 A CN2011102227035 A CN 2011102227035A CN 201110222703 A CN201110222703 A CN 201110222703A CN 102410909 A CN102410909 A CN 102410909A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/38—Investigating fluid-tightness of structures by using light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
- G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
- G01M3/047—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means with photo-electrical detection means, e.g. using optical fibres
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a detecting sensor and a method of making the same. The invention can guarantee a cable export part to keep enough rigidity required by a cable and can welding the cable export part and the cable well with laser. The detecting sensor is provided with a shell made of fluoro resin; and the cable exported to the external of the shell from a front end part of the cable export part and provided with an outer sheath component made of the fluoro resin. The cable export part and the sheath component of the cable are welded with laser. Thus, the cable export part and the sheath component of the cable are sealed. The front end of the cable export part is in a tapering shape.
Description
Technical field
The present invention relates to the manufacturing approach of a kind of detecting sensor and detecting sensor.
Background technology
As detecting sensor in the past, known have such detecting sensor, and it possesses: the main portion of sensor that will be used to detect detected material is accommodated in inner housing; Be formed at the cable leading-out portion of the tubular on this housing; And export to outside cable (for example, referring to TOHKEMY 2005-285501 communique) from this cable leading-out portion.In this detecting sensor, in order to prevent to be corroded because of liquid such as medicine cause the lead in main portion of sensor and the cable, the shell components of housing and cable is formed by fluororesin.In order to prevent the corrosion of the main portion of sensor, also must guarantee the watertightness of enclosure interior, for this reason, need be with sealing positively between the cable leading-out portion of housing and the cable.As this method, that expects has the bonding agent of employing with cable leading-out portion and the mutual bonding method of cable.But, because fluororesin is low to the compatibility of bonding agent, so be difficult to adopt the bonding agent will be bonding with the shell components of cable leading-out portion that forms by fluororesin and cable.In addition, as the method beyond bonding, also expected the method for heat welded.But fluororesin not only has resistance to chemical reagents, and thermotolerance is also excellent, and fusing point is high, so also be difficult to the cable leading-out portion that is formed by fluororesin and the shell components heat welded of cable.
So, expected adopting the method for laser again with cable leading-out portion and cable welding.In the method, through from the outside to inserting the cable leading-out portion irradiating laser be connected with cable, thereby give enough energy to the boundary member between cable leading-out portion and the cable.Thus, can be with cable leading-out portion and the mutual welding of cable.
But, in the detecting sensor of above-mentioned that kind, keep the required enough rigidity of cable in order to ensure the cable leading-out portion, need to increase the thickness (thickness from the inner peripheral surface to the outer peripheral face) of cable leading-out portion.But, if increase the thickness of cable leading-out portion, then can not give the energy of laser well to the boundary member of cable leading-out portion and cable, welding is insufficient.Its result might cause the watertightness of heat seal strength and housing between cable leading-out portion and the housing to descend.
Summary of the invention
The objective of the invention is to, the manufacturing approach of a kind of detecting sensor and detecting sensor is provided, can guarantee that the cable leading-out portion keeps the required enough rigidity of cable, and can carry out laser welding to cable leading-out portion and cable well.
In order to achieve the above object, according to a mode of the present invention, a kind of detecting sensor is provided, it possesses: by the housing that fluororesin forms, its main portion of sensor that will be used to detect detected material accommodates; The cable leading-out portion of tubular, it forms from housing is outstanding; And cable, its leading section from the cable leading-out portion exports to the outside of housing, and has the shell components that is formed by fluororesin.The shell components of cable leading-out portion and cable is by laser welding, thereby quilt is sealed between the shell components of cable leading-out portion and cable.The leading section of cable leading-out portion has the gradually thin shape of front end.
According to other type of the present invention, a kind of manufacturing approach of detecting sensor is provided.Detecting sensor possesses: by the housing that fluororesin forms, its main portion of sensor that will be used to detect detected material accommodates; The cable leading-out portion of tubular, it forms from housing is outstanding; And cable, its leading section from the cable leading-out portion exports to the outside of housing, and has the shell components that is formed by fluororesin.The shell components of cable leading-out portion and cable is by laser welding.Manufacturing approach comprises: the leading section of cable leading-out portion is formed the gradually operation of thin shape of front end; And in the operation of leading section with cable leading-out portion and cable laser welding.
Description of drawings
Fig. 1 is the synoptic diagram of an example that the purposes of the related leakage detecting sensor of the embodiment of this embodiment is shown.
Fig. 2 is the stereographic map that the leakage detecting sensor of Fig. 1 is shown.
Fig. 3 is the exploded perspective view that the leakage detecting sensor of Fig. 2 is shown.
Fig. 4 is the vertical view that the leakage detecting sensor of Fig. 2 is shown.
Fig. 5 is the upward view that the leakage detecting sensor of Fig. 2 is shown.
Fig. 6 is the cut-open view when the 6-6 line of Fig. 2 cuts.
Fig. 7 is along the 7-7 line of Fig. 4 cut-open view when cutting through the mode of test section.
Fig. 8 is the stereographic map that the lid of leakage detecting sensor is shown.
Fig. 9 is the synoptic diagram that is used to explain from the route of the light of light-projecting component.
Figure 10 is the stereographic map that is used to explain the laser welding method of cable leading-out portion and cable.
Figure 11 (a) and (b) be used to explain cable leading-out portion and cable laser welding stereographic map.
Embodiment
Below, according to accompanying drawing, the detecting sensor that an embodiment of the invention are related is described.
As shown in Figure 1, leakage detecting sensor 1 is installed on the face that the is provided with P of the manufacturing installation D below in the factory through bolt (omitting diagram), detects the leakage from manufacturing installation D.Like Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5; Leakage detecting sensor 1 has sensor main body portion 11, between the pedestal part 12 and the holding member 13 that are provided with between face P and the sensor main body portion 11; This holding member 13 is fixed to sensor main body portion 11 and is provided with on the face P, and pedestal part 12 is kept.
Sensor main body portion 11 has: the round-ended cylinder shape is roughly arranged, be the housing 14 of cap (cap) shape; Lid 15 with the top watertightness ground sealing of housing 14; And the cable 16 of deriving from housing 14.Housing 14 is accommodated main portion such as substrate 17 sensors such as grade.Perfluoroalkoxy resin) etc. (Perfluoroalkoxy alkane: fluororesin forms housing 14, has columnar peripheral part 21 and with the bottom 22 of the lower end closed of peripheral part 21 by the PFA with thermotolerance and resistance to chemical reagents.The opening 14a of peripheral part 21 (with the end of bottom 22 opposition sides) is by roughly discoid lid 15 (referring to Fig. 8) sealing.This lid 15 is also formed by the fluororesin such as PFA with thermotolerance and resistance to chemical reagents.
On the rearward end of the fore-and-aft direction X of the peripheral part 21 of housing 14, be formed with the outstanding base portion 24 of essentially rectangular shape.The end face 24a of the fore-and-aft direction X of base portion 24 has the plane orthogonal with fore-and-aft direction X.Said cable leading-out portion 23 forms along the outstanding mode of fore-and-aft direction X with the end face 24a from base portion 24.23 one-tenth of cable leading-out portions are cylindric, and perimembranous is formed with the inserting hole 25 (referring to Fig. 6) that is used for inserting energising cable 16 in it.
The leading section 23a of cable leading-out portion 23 has conical by its shape, is the gradually thin shape of front end.Specifically, the leading section 23a of cable leading-out portion 23 has truncated cone shape.The diameter of the inserting hole 25 of cable leading-out portion 23 (internal diameter of cable leading-out portion 23) form cable leading-out portion 23 whole axially on constant (referring to Fig. 6).In addition, cable leading-out portion 23 axially consistent with the perforation direction of inserting hole 25, in this embodiment, also consistent with the fore-and-aft direction X of leakage detecting sensor 1.On the other hand, constant till the axial center section of the external diameter of cable leading-out portion 23 from base end part 23b to cable leading-out portion 23, on the leading section 23a of cable leading-out portion 23, along with reducing gradually towards front end.In other words, till the axial center section of the outer peripheral face of cable leading-out portion 23 from base end part 23b to cable leading-out portion 23,, and form conical by its shape, become the dip plane at leading section 23a along the axially parallel ground extension of cable leading-out portion 23.That is, the thickness of the base end part 23b of cable leading-out portion 23 is bigger than the thickness of leading section 23a.Thus, can guarantee the rigidity of cable leading-out portion 23.
In addition, on the end face 24a of base portion 24, be formed with the embeded slot 26 that shape extends that is in line respectively in the both sides of the horizontal Y of cable leading-out portion 23 along vertical direction Z.And, on the two sides of the horizontal Y of base portion 24, be formed with the engaging protuberance 27 that shape extends that is in line respectively along vertical direction Z.
In addition, on the peripheral part 21 of housing 14, on the two side portions of horizontal Y, be formed with the handle part 21a (referring to Fig. 4) that constitutes by a plurality of projections.Mark and the antiskid part of handle part 21a when leakage detecting sensor 1 or sensor main body portion 11 monomers are controlled plays a role.In addition, on the peripheral part 21 of housing 14, than being formed with a pair of teat 21b on the position of handle part 21a near front side (side opposite) with base portion.Do not give illustrated stationary fixture through employing teat 21b is pushed downwards, thereby the leading section that can prevent housing 14 vibrates.In addition, this teat 21b is formed on the pars intermedia of vertical direction Z of housing 14.Therefore, when utilizing said stationary fixture to push teat 21b downwards, can prevent that this stationary fixture is more outstanding to the top than housing 14.
On holding member 13, be formed with fixed part 31, this fixed part 31 has the said bolt that is used to make fixing usefulness and inserts logical bolt insertion hole 31a.In addition, on holding member 13, be formed with encirclement portion 32, this encirclement portion 32 from fixed part 31 vertically Z extend, and with the around of the cable leading-out portion 23 of housing 14.Further, the holding member 13 is formed with a holding piece 33, the holding piece 33 wall portion 32 extends from the packet, and the base 24 of the housing 14 to maintain.In addition, the housing 14 from the outlet portion 23 derived cable 16 is inserted through the cable is formed in the bag wall portion 32 of the notch 32a.
As shown in Figure 3, on retention tab 33, be formed with a pair of fitting projection 34, this fitting projection 34 is extended also forwards outstanding along vertical direction Z.Each fitting projection 34 is fitted to respectively in the corresponding embeded slot 26 of base portion 24 of housing 14.Each fitting projection 34 has the shape that front end broadens.The embeded slot 26 of chimeric with it housing 14 also has and fitting projection 34 corresponding shape.Thus, can prevent that housing 14 from forwards squinting from holding member 13.
In addition, be formed with opposed a pair of slot 35 on horizontal Y on the retention tab 33.Each slot 35 engages protuberance 27 engagings respectively with the base portion 24 of housing 14 corresponding.On the central portion of vertical direction Z of each engaging protuberance 27, be formed with along the horizontal outstanding projection 27a of Y.This projection 27a is blocked only in the stop hole 35a that is formed at slot 35.Thus, can prevent that sensor main body portion 11 from squinting from holding member 13 on vertical direction Z.
Discoid for roughly between the bottom 22 of housing 14 and the pedestal part 12 that is provided with between the face P, when vertical direction Z watched, the housing 14 of the shape of pedestal part 12 and sensor main body portion 11 was roughly the same.In addition, identical with housing 14, pedestal part 12 is also formed by the fluororesin such as PFA with thermotolerance and resistance to chemical reagents.On the rear portion (end of fore-and-aft direction X) of pedestal part 12, be formed with respectively to two of horizontal Y side-prominent a pair of protuberance 12a.On the other hand, on the position corresponding of holding member 13, be formed with a pair of fastener 31b that forwards extends from fixed part 31 with protuberance 12a.Fastener 31b is ended to the corresponding protuberance 12a of pedestal part 12 by card respectively.Thus, can prevent that pedestal part 12 from forwards squinting from holding member 13.
And, on pedestal part 12, being formed with a pair of card and ending protuberance 12b, this a pair of card ends protuberance 12b, and the outer rim from pedestal part 12 is outstanding to the top respectively.A pair of card ends protuberance 12b and is ended to the card of the lower end of the peripheral part that is formed at housing 14 21 by card in a circumferential direction and ending among the recess 21c, thereby restriction pedestal part 12 is rotated with respect to housing 14 in a circumferential direction.
On the surface of lid 15, be formed with crooked convex surface 41, this bending convex surface 41 forms more towards the downward more curved surface of outer rim.On this bending convex surface 41, be formed with the cross recess 42 that extends along fore-and-aft direction X and horizontal Y.Crooked convex surface 41 and cross recess 42 will be attached to the liquid that covers on 15 the upper surface and be directed to and cover 15 outer rim.In addition, on crooked convex surface 41, be formed with 3 display parts 43 arranging along horizontal Y with the mode that overlaps with cross recess 42.In addition, the center of cross recess 42 is consistent with the center of lid 15, and the display part 43 of center overlaps with the center of cross recess 42.
Like Fig. 7 and shown in Figure 8, below each display part 43, be formed with light guide section 44, this light guide section 44 from rear side vertically Z extend to lid 15 enclosure interior side.The lower end of each light guide section 44 is near the upper surface of the LED20 of substrate 17.Light from each LED20 mainly passes through corresponding light guide section 44, penetrates from each display part 43.In addition, the detected state that shows the leakage of leakage detecting sensor 1 through the illuminating state of this display part 43.
In addition, be formed with locator protrusions 45 (referring to Fig. 4 and Fig. 8) at the back side of lid 15 rearward end, this locator protrusions 45 engages with recess (omit and illustrate) on being formed on housing 14.Cover 15 location through this locator protrusions 45 with respect to housing 14.In addition, be formed with stiffening rib 46 at the back side of lid 15.Cover 15 rigidity (referring to Fig. 8) through these stiffening rib 46 raisings.
This leakage detecting sensor 1 has 2 test sections 51, and this test section 51 is used to detect the liquid (referring to Fig. 5 and Fig. 7) that is provided with between face P and the pedestal part 12.2 test sections 51 are arranged along fore-and-aft direction X and are provided with.Test section 51 be formed on leakage detecting sensor 1 near on the position in front, another test section 51 is formed on the position near central authorities of leakage detecting sensor 1.
Each test section 51 has pair of shells side protrusion 52, a pair of pedestal part side protrusion 53, light-projecting component 18 and photo detector 19.Pair of shells side protrusion 52 is arranged along horizontal Y and is arranged on the bottom 22 of housing 14, forms respectively towards the below outstanding (referring to Fig. 7).A pair of pedestal part side protrusion 53 is arranged along horizontal Y similarly and is arranged on the pedestal part 12, forms outstanding towards the below respectively.Each case side protrusion 52 constitutes on vertical direction Z with each pedestal part side protrusion 53 and overlaps.The part of each pedestal part side protrusion 53 with face P butt is set.In addition, light-projecting component 18 and photo detector 19 are configured in the top of each case side protrusion 52 respectively.In this test section 51, the medial surface of each pedestal part side protrusion 53 is as being used for the detection faces 51a that the liquid that is provided with on the face P detects is played a role.
As shown in Figure 9, in this leakage detecting sensor 1, when on the detection faces 51a of test section 51, not having the liquid contact, the light that penetrates from light-projecting component 18 passes through (left side a Fig. 9) case side protrusion 52 and a pedestal part side protrusion 53.At this moment, this light that passes through reflects at detection faces 51a, through another case side protrusion 52 and another pedestal part side protrusion 53, is received light by photo detector 19.With respect to this, when the liquid contact was arranged on detection faces 51a, the refraction index changing of detection faces 51a was not so the light income of photo detector 19 changes from there is the liquid state of contact at detection faces 51a.That is, the light income of photo detector 19 is according to having or not attaching liq to change on the pedestal part side protrusion 53, and photo detector 19 will be corresponding with this light income outputed to by light signal not give illustrated control part.Control part has no liquid (leakage) according to the optical signal detecting that receives from photo detector 19, detecting under the situation of liquid, for example via cable 16 stop signal is sent to manufacturing installation D, and manufacturing installation D is stopped.
The manufacturing approach of leakage detecting sensor 1 then, is described.
At first, through opening 14a main portion such as installation base plate 17 sensors such as grade in housing 14.Then, insert cable 16 in the inserting hole 25 that leads to cable leading-out portion 23 after, the lead of cable 16 is connected with substrate 17.Then, through laser welding mounting cover 15 on the opening 14a of housing 14, with the opening 14a watertightness ground sealing on the top of housing 14.In addition, when carrying out this laser welding,, carry out welding through to covering 15 outer rim and the boundary member K irradiating laser between the housing 14.More particularly, when carrying out this laser welding, will cover 15 and push towards housing 14 to downside, and make and cover 15 and go up driving fit at vertical direction Z with the direction (radially) of vertical direction Z quadrature respectively, under this closed state, carry out laser welding with housing 14 from upside.Thus, the sealing between the opening 14a of housing 14 and the lid 15 increases.In addition; Housing 14 forms with lid 15 materials by same color, identical material (fluororesin); Housing 14 adopts the method to border Partial K direct irradiation laser with the laser welding of lid 15, rather than adopts from the method for lamination direction to two overlapping parts irradiating lasers.Therefore, even the laser welding between the fluororesin, also welding well.
Then, the cable leading-out portion 23 of housing 14 and cable 16 are each other by laser welding.At this moment, shown in Figure 10 and Figure 11 (a),, the leading section 23a of cable leading-out portion 23 do not give on the illustrated anchor clamps so that being set to sensor main body portion 11 towards the mode of vertical direction upside.Thus, the derivation direction of cable 16 is towards the vertical direction upside.Then, be the center with the axis C of cable leading-out portion 23, make sensor main body portion 11 and cable 16 rotations, utilize do not give illustrated laser aid from the direction of axis C quadrature leading section 23a irradiating laser L to cable leading-out portion 23.In addition, in Figure 11, the slit between inner peripheral surface of cable leading-out portion 23 (inserting hole 25) and the cable 16 is illustrated by exaggerative.
In addition, as the laser aid that in laser welding, uses, preferred use the wavelength that penetrates the material with the welding object and adapt, be the laser L of absorbable wavelength.To the fluororesin such as PFA of this embodiment, the laser aid of the laser (wavelength is approximately 10.64 μ m) of ejaculation far infrareds such as use carbonic acid gas laser.That is,, can directly use carbonic acid gas laser, in addition, also can adopt and use the YAG laser instrument its wavelength (1.064 μ m) to be amplified the laser aid of 10 times of ejaculations as laser aid.In addition; Though the wavelength of YAG laser instrument is not suitable for the welding of fluororesin; But shell components 16a and the middle material that a bit can absorb the wavelength of YAG laser instrument that adds of cable leading-out portion 23 (more particularly, interior all sides of cable leading-out portion 23 (inserting hole 25 sides)) as if at cable 16 improve and export energy; Even then adopt the laser of the wavelength period of YAG laser instrument, also can carry out welding.But,, might cause lead damaged if the laser that uses this high output then exerts an influence cable leading-out portion 23 and cable 16 mutual weldings to the lead in the cable 16.Therefore, consider this problem, preferred use wavelength is the laser L (carbonic acid gas laser) of 10.64 μ m in the laser welding of this embodiment.
In the laser welding of cable leading-out portion 23; In order easily the energy of laser L to be given to the boundary member between cable leading-out portion 23 and the cable 16, the position (position of vertical direction) of irradiating laser L is set on the position near the front end of the less cable leading-out portion 23 of thickness.Then, be made as constant in position and under the state that shines, make sensor main body portion 11 and cable 16 rotations tens circles the vertical direction of this laser L.Then, make ejaculation position (the base end part side of cable leading-out portion 23) displacement a little downwards on vertical direction of laser L, in the irradiating laser L of this position, make sensor main body portion 11 and cable 16 rotations tens circles once more.Carry out this several times ejaculation position operation that displacement is shone below vertical direction a little that makes laser L.Like this; On the leading section 23a of cable leading-out portion 23; The partial melting that absorbs energy and generate heat, the resin of this fusion be because of gravity flows downwards on vertical direction, enters into the slit (referring to Figure 11 (b)) between the shell components 16a of inserting hole 25 and cable 16.Thus, the shell components 16a of the inner peripheral surface of cable leading-out portion 23 and cable 16 is by welding each other, and quilt sealing positively between them.In addition, the opening portion that is formed on the housing 14 is merely opening 14a and cable leading-out portion 23 these 2 places that are used to install internal part, thus adopt aforesaid way this 2 place to be sealed through laser welding, thus can guarantee the watertightness of housing 14 inside.
Like this, from inserting the outer circumferential side irradiating laser L (carbonic acid gas laser) of the cable leading-out portion 23 be connected with cable 16, thereby make the cable 16 and the 23 mutual weldings of cable leading-out portion that comprises lead in the inside of shell components 16a and form.Thus, with through the heat welded beyond the laser welding with after cable leading-out portion 23 and the shell components 16a welding, lead inserted leads to the inner situation of shell components 16a and compare, can simplify manufacturing approach.In addition, in this embodiment, the leading section 23a of cable leading-out portion 23 forms the gradually thin shape of front end, to this leading section 23a irradiating laser L, carries out laser welding.Therefore, the boundary member between forward end 23a and the cable 16 is given the energy of laser L well, makes cable leading-out portion 23 and cable 16 laser welding positively.
The characteristic action effect of this embodiment then, is described.
(1) in the leakage detecting sensor 1 of this embodiment, the cable leading-out portion 23 that is formed by fluororesin and the shell components 16a of cable 16 are sealed between them by laser welding, and the leading section 23a of cable leading-out portion 23 has the gradually thin shape of front end.Therefore, even the thickness of the base end part 23b of cable leading-out portion 23 is bigger, also can make the thickness of leading section 23a of the gradually thin cable leading-out portion 23 of front end less.Therefore, in the leading section 23a of cable leading-out portion 23, can give the energy of laser L well to the boundary member between leading section 23a and the cable 16, can be positively with cable leading-out portion 23 and cable 16 laser weldings.Thus, can increase the thickness of the base end part 23b of cable leading-out portion 23, with enough rigidity of guaranteeing that supporting cable 16 is required, and can be at leading section 23a with cable leading-out portion 23 and cable 16 laser welding well.In addition, owing to can in the shell components 16a of cable 16, insert and led under the state of lead, with the mutual welding of shell components 16a of the inner peripheral surface and the cable 16 of cable leading-out portion 23, so can simplify the manufacturing of leakage detecting sensor 1.
(2) because the leading section 23a of cable leading-out portion 23 has conical by its shape, so the leading section 23a of the gradually thin cable leading-out portion 23 of front end that can easily be shaped.
(3) so that the leading section 23a of cable leading-out portion 23 disposes under the state of housing 14 towards the mode of vertical direction upside, the leading section 23a of cable leading-out portion 23 and cable 16 is by laser welding each other.Therefore, the fore-end of the cable leading-out portion 23 of the energy fusion through laser L trickles towards gravity direction, enters into the inner peripheral surface of cable leading-out portion 23 and the slit between the cable 16 easily.Then, through entering into the resin in this slit, can be with sealing positively between cable leading-out portion 23 and the cable 16.
(4) be when the center makes housing 14 and cable 16 rotations at axle, the leading section 23a and the cable 16 of cable leading-out portion 23 carried out laser welding with cable leading-out portion 23.Therefore, can be easily with leading section 23a and cable 16 laser weldings towards the cable leading-out portion 23 of vertical direction upside.
(5) because the laser L that adopts far infrared carries out laser welding to the leading section 23a and the cable 16 of cable leading-out portion 23, so can more positively carry out laser welding.
(6) from the direction of the axis quadrature of cable leading-out portion 23 leading section 23a irradiating laser L to cable leading-out portion 23, the leading section 23a and the cable 16 of cable leading-out portion 23 carried out laser welding.Therefore, can be well with the leading section 23a and cable 16 laser weldings of cable leading-out portion 23.
(7), the leading section 23a and the cable 16 of cable leading-out portion 23 carried out laser welding with after the opening 14a that is used to internal part is installed of housing 14 and lid 15 laser weldings with this opening 14a sealing.Because the aperture area than cable leading-out portion 23 is big usually for the aperture area of opening 14a, so the opening 14a of housing 14 is also big with the welding area of cable 16 than cable leading-out portion 23 with the welding area of lid 15.Therefore, the opening 14a by housing 14 is bigger than the thermal value that the welding by cable leading-out portion 23 and cable 16 produces with the thermal value of the laser welding generation of lid 15.Therefore, if before the laser welding of the opening 14a of housing 14 and lid 15, with leading section 23a and cable 16 laser weldings of cable leading-out portion 23, then cable leading-out portion 23 is because of laser welding is closed, and the heat radiation road that the heat of housing 14 inside are shed is cut off.Therefore, the opening 14a of housing 14 rises internal temperature with the heat that laser welding produced of lid 15, its result, and housing 14 too expands, and might cause opening 14a and lid 15 weldings well.For this point, in this embodiment, the opening 14a of housing 14 looses to the outside from being fused cable 16 cable leading-out portion 23 before with the internal heat of the housing that laser welding produced of lid 15.Therefore, can suppress the rising of the internal temperature of housing 14 less, its result can be through the opening 14a and lid 15 sealing positively of laser welding with housing 14.
In addition, embodiment of the present invention also can change to following mode.
In the above-described embodiment, the leading section 23a of cable leading-out portion 23 has conical by its shape, yet is not limited thereto, and leading section 23a for example also can form front end with stepped tapered shape.In addition, the leading section 23a of the cable leading-out portion 23 of above-mentioned embodiment has the conical by its shape of straight inclined when becoming side-looking, in addition, for example also can form and has to the inside or the conical by its shape of the inclination of outside curve.
In the above-described embodiment, the leading section 23a that makes cable leading-out portion 23 is towards the vertical direction upside, under this state, from the direction of axis C quadrature leading section 23a irradiating laser L to cable leading-out portion 23, carry out laser welding.But the welding process of leading section 23a is not limited thereto.
In the above-described embodiment, be the center with the axis C of cable leading-out portion 23, when making housing 14, the leading section 23a and the cable 16 of cable leading-out portion 23 carried out laser welding with cable 16 rotations.But the welding process between leading section 23a and the cable 16 is not limited thereto, also can be through housing 14 is fixing with cable 16, and making laser L is the center rotation with the axis C of cable leading-out portion 23, carries out welding.
In the above-described embodiment, with after the opening 14a of housing 14 and the lid 15 mutual laser weldings, the leading section 23a and the cable 16 of cable leading-out portion 23 carried out laser welding.But the order of carrying out welding is not limited thereto, also can be on the contrary, and with before the opening 14a of housing 14 and lid 15 laser weldings, with the leading section 23a and the cable 16 mutual laser weldings of cable leading-out portion 23.
In the above-described embodiment, cable 16 is used for being electrically connected between main portion of sensor and the outside.But cable 16 is not limited thereto, and also can be that optical fiber is used cable.
In the above-described embodiment, the present invention is applied to leakage detecting sensor 1, but is not limited thereto, and also can be applied to other detecting sensors.
Claims (8)
1. detecting sensor, it possesses:
By the housing that fluororesin forms, its main portion of sensor that will be used to detect detected material accommodates;
The cable leading-out portion of tubular, it forms from said housing is outstanding; And
Cable, its leading section from said cable leading-out portion exports to the outside of said housing, and has the shell components that is formed by fluororesin,
The shell components of said cable leading-out portion and said cable is by laser welding, thereby quilt is sealed between the shell components of said cable leading-out portion and said cable,
Said detecting sensor is characterised in that,
The leading section of said cable leading-out portion has the gradually thin shape of front end.
2. detecting sensor according to claim 1 is characterized in that,
The leading section of said cable leading-out portion has truncated cone shape.
3. the manufacturing approach of a detecting sensor,
Detecting sensor possesses:
By the housing that fluororesin forms, its main portion of sensor that will be used to detect detected material accommodates;
The cable leading-out portion of tubular, it forms from said housing is outstanding; And
Cable, its leading section from said cable leading-out portion exports to the outside of said housing, and has the shell components that is formed by fluororesin,
Sealed between said cable leading-out portion and the said cable,
Said manufacturing approach is characterised in that, comprising:
The leading section of said cable leading-out portion is formed the gradually operation of thin shape of front end; And
In the operation of said leading section with said cable leading-out portion and said cable laser welding.
4. the manufacturing approach of detecting sensor according to claim 3 is characterized in that,
Said laser welding operation disposes towards the mode above the vertical direction at the leading section with said cable leading-out portion under the state of said housing carries out.
5. according to the manufacturing approach of claim 3 or 4 described detecting sensors, it is characterized in that,
Said laser welding operation comprise from the direction of the axis quadrature of said cable leading-out portion operation towards the leading section irradiating laser of said cable leading-out portion.
6. according to the manufacturing approach of claim 3 or 4 described detecting sensors, it is characterized in that,
Said laser welding operation is that the center makes under the state of said housing and said cable rotation and carries out at the axle with said cable leading-out portion.
7. according to the manufacturing approach of claim 3 or 4 described detecting sensors, it is characterized in that,
Said laser welding operation comprises the laser that the adopts far infrared operation with the leading section and the said cable laser welding of said cable leading-out portion.
8. according to the manufacturing approach of claim 3 or 4 described detecting sensors, it is characterized in that,
Said housing possesses the opening that is used to install internal part and with the lid of closure of openings, said laser welding operation is carried out after the laser welding at the opening of said housing and said lid each other.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010171799 | 2010-07-30 | ||
| JP2010-171799 | 2010-07-30 | ||
| JP2010186401A JP5677786B2 (en) | 2010-08-23 | 2010-08-23 | Manufacturing method of detection sensor |
| JP2010-186401 | 2010-08-23 |
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| CN102410909A true CN102410909A (en) | 2012-04-11 |
| CN102410909B CN102410909B (en) | 2015-09-02 |
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| CN201110222703.5A Active CN102410909B (en) | 2010-07-30 | 2011-07-27 | The manufacture method of detecting sensor |
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| KR (1) | KR101756195B1 (en) |
| CN (1) | CN102410909B (en) |
Cited By (1)
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| CN114424031A (en) * | 2019-10-17 | 2022-04-29 | 株式会社华尔卡 | Method for manufacturing low heat resistance sensor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102040640B1 (en) * | 2018-10-22 | 2019-11-06 | (주)화이버 옵틱코리아 | Sensor for sensing leak |
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| GB2397045B (en) * | 2001-11-07 | 2005-06-22 | Kurosaki Yasuo | Welding method of thermoplastic resin castings |
| JP4354323B2 (en) * | 2004-03-29 | 2009-10-28 | 株式会社キーエンス | Photoelectric sensor, floodlighting device, and retroreflective mirror for photoelectric sensor |
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| JP3220440B2 (en) * | 1999-09-01 | 2001-10-22 | 株式会社ツーデン | Liquid leak sensor |
| JP3684336B2 (en) * | 2000-07-31 | 2005-08-17 | サンクス株式会社 | Leak sensor |
| JP2004045226A (en) * | 2002-07-11 | 2004-02-12 | Takenaka Doboku Co Ltd | Water leakage detector |
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| US12072349B2 (en) | 2019-10-17 | 2024-08-27 | Valqua, Ltd. | Method of manufacturing low heat-resistant sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101756195B1 (en) | 2017-07-10 |
| KR20120012412A (en) | 2012-02-09 |
| CN102410909B (en) | 2015-09-02 |
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