JP3852839B2 - Leak sensor - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a leak sensor that can be securely attached to a liquid receiving surface that is an attachment target.
[0002]
[Prior art]
Conventionally, a leak sensor is used to detect leakage of a chemical solution or a corrosive solution (hereinafter simply referred to as “chemical solution”) from an apparatus or piping. Such a liquid leakage sensor is attached to a liquid receiving surface of a pan (dish pan) disposed at a site where chemical liquid leakage is likely to occur. More specifically, a liquid leakage sensor main body having a standby fixing member fixed to the liquid receiving surface of the pan and a pair of cantilever beams slidably engageable with the standby fixing member along the liquid receiving surface is provided. is doing. The liquid leakage sensor main body includes a light projecting / receiving fiber and a prism that refracts detection light from the light projecting fiber and guides it to the light receiving fiber when there is no liquid leakage.
[0003]
On the other hand, there is a type in which an amplifier is built in the liquid leakage sensor body, the presence / absence of liquid leakage is detected by a combination of a light projecting / receiving element and a prism, and the detection result is transmitted to the outside through a signal line.
[Problems to be solved by the invention]
When such a leak sensor detects a leak, first repair the leak location, then remove the chemical that has accumulated in the pan, dry the pan, and remove the leak sensor from the pan to remove the leak sensor. It is necessary to wipe off the chemical solution adhering to the surface, attach a liquid leakage sensor to the pan, and return the liquid leakage to a detectable state again.
[0004]
For example, as shown in FIG. 3 of Japanese Patent Application Laid-Open No. 2002-116138, a presser plate that engages with the other cantilever end is elastically connected to one cantilever end of the leak sensor body. Are known. The presser plate is configured to fix the leak sensor main body to the standby fixing member in cooperation with the two cantilevers.
[0005]
However, the light projecting / receiving fiber and the lead wire extend from the leak sensor main body to the outside. For example, if a part of the optical fiber or the lead wire is caught on a hand or a tool by the operator, A large bending moment is generated between the sensor main body and the standby fixing portion, and the engagement between the presser plate and the end portion of the cantilever is easily released. Similarly, when the optical fiber or lead wire is pulled in the direction in which the leak sensor body is detached from the standby fixing member, the engagement between the presser plate and the end of the cantilever is released.
As described above, when the liquid leakage sensor main body is detached from the standby fixing member, the liquid leakage cannot be detected accurately and quickly.
[0006]
An object of the present invention is to provide a liquid leakage sensor that is detachable from an object and does not easily come off once attached to the object.
[0007]
[Means for Solving the Problems]
  In order to solve the above-described problems, a liquid leakage sensor according to the present invention includes a liquid leakage sensor main body that can detect the presence or absence of liquid leakage on the liquid receiving surface, and is attached to the liquid receiving surface, and the liquid leakage sensor main body is awaited and fixed The leak sensor includes a pair of cantilevers that can be engaged with the fix member in a non-rotatable state with respect to the fix member, and the fix member is engaged with the fix member. The first restriction means for preventing the pair of cantilever beams from separating from the liquid receiving surface, and the liquid leakage sensor has a width at each end of the pair of cantilever beams engaged with the fixing member. Having a second restricting means for simultaneously restricting expansion in the directionThe second restricting means has a substantially U-shaped shape, and both ends of the substantially U-shaped second restricting means are leaked with the base ends of the pair of cantilevers or the vicinity thereof as pivot points. The sensor body is pivotably attached, and the disengagement direction of the second restricting means and the expansion direction of the cantilever are in different planes, thereby preventing the expansion of each tip of the cantilever. Made possibleYes.
[0008]
  The second restricting means has a substantially U-shaped shape, and both ends of the substantially U-shaped second restricting means have the base end portions of the pair of cantilevers or the vicinity thereof as a pivotal fulcrum. It is pivotally attached to the main body, and the disengagement direction of the second restricting means and the expanding direction of the cantilever are in different planes.Since the front ends of the pair of cantilevers engaged with the fixing member are simultaneously restricted from expanding in the width direction, the end of the cantilever can be reliably prevented from expanding. For this reason, even if the optical fiber or the lead wire is caught, the leakage sensor main body does not rotate with respect to the standby fixing member, and the leakage sensor main body does not come off the standby fixing member.
  Further, since the second restricting means is rotatably connected to the leak sensor main body, the second restricting means is not lost and the mounting workability is not deteriorated.
[0009]
  A liquid leakage sensor according to claim 2 of the present invention includes a liquid leakage sensor main body capable of detecting the presence or absence of the liquid leakage sensor on the liquid receiving surface, and a fixing member attached to the liquid receiving surface for waiting and fixing the liquid leakage sensor. The liquid leakage sensor main body has a pair of cantilever beams that can engage the fixing member, and the fixing member receives the pair of cantilever beams engaged with the fixing member. And a liquid leakage sensor that restricts the pair of cantilevers from separating along the liquid receiving surface with respect to the fixing member. Having means,The third restricting means has a substantially U-shaped shape, and both ends of the substantially U-shaped third restricting means are at the base ends of a pair of cantilevers or in the vicinity thereof as a fulcrum. The cantilever is attached to the main body so that the disengagement direction of the third restricting means and the separation direction along the sensor attachment surface of the cantilever are in different planes, so that the cantilever is attached to the sensor attachment surface. It is possible to prevent separation from the fixing member along.
[0010]
  The third restricting means has a substantially U-shaped shape, and both ends of the substantially U-shaped third restricting means are at the base ends of a pair of cantilevers or in the vicinity thereof as a fulcrum. It is rotatably attached to the main body, and the disengagement direction of the third restricting means and the separation direction along the sensor attachment surface of the cantilever are in different planes.Since the pair of cantilever beams are separated from the fixing member along the liquid receiving surface, the leak sensor body is awaited and fixed even if the optical fiber or lead wire is pulled carelessly. It does not come off the member.
  Further, since the third restricting means is pivotably connected to the liquid leakage sensor main body, the third restricting means is not lost and attachment workability is not deteriorated.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a liquid leakage sensor according to a first embodiment of the present invention will be described with reference to the drawings.
[0016]
As shown in FIGS. 1 and 2, the leak sensor 1 according to the first embodiment of the present invention is capable of engaging with the leak sensor body 110 and the leak sensor body 110 and receiving the leak liquid. A standby fixing member 120 attached to the upper surface of a pan (not shown), which is a surface, and a lock member (second regulating means) 130 for locking the leak sensor main body 110 to the standby fixing member. .
[0017]
The liquid leakage sensor main body 110 in FIG. 1 is of a built-in amplifier type, and incorporates a light projecting element, a light receiving element, a prism for changing an optical path, an amplifier (not shown), and the like.
[0018]
Further, a power supply and signal line cord 140 is led out from a predetermined position around the leak sensor main body. The surface of the leak sensor body 110 is made of a fluororesin so that the leak sensor body is not adversely affected by chemicals, corrosive liquids or the like. As for the material, vinyl chloride, polyethylene, polypropylene or the like may be appropriately selected according to the physical properties of the liquid to be detected.
[0019]
The leak sensor main body 110 has a disc shape, and a pair of cantilevers 111 and 112 are formed so as to protrude in parallel with the upper surface 110 a of the leak sensor main body 110 from one side surface. The pair of cantilevers 111 and 112 are complementary in shape to a standby fixing member 120 described later.
[0020]
On the other hand, the standby fixing member 120 that engages with the liquid leakage sensor main body 110 is also made of fluororesin from the viewpoint of chemical resistance and corrosion resistance, and has a thin plate-like base 121 and a half-shaped rectangular shape in plan view formed on the base. A portion 122 and a remaining half portion 123 which is formed integrally with the half portion 122 on the base and has a substantially semicircular shape are provided.
[0021]
The half portion 122 having a rectangular shape in plan view is configured to complementarily match the pair of cantilever beams 111 and 112 of the leak sensor main body 110 in plan view. Hereinafter, this rectangular half in plan view is referred to as an engagement-side half 122, and the remaining half is referred to as a non-engagement-side half 123.
[0022]
Although not shown in the drawing, the engagement-side half 122 partially interferes with the pair of cantilever beams 111 and 112 of the leak sensor main body 110 in plan view, and the pair of cantilever beams 111 and 112 When engaged with the engagement-side half portion 122, the leakage sensor main body 110 is not separated from the upper surface of the standby fixing portion 120 in the vertical direction by the interference portion (first restricting means).
[0023]
On the other hand, when the non-engaging side half 123 of the standby fixing member 120 is engaged with the pair of cantilever beams 111 and 112 of the leak sensor main body 110, the outer side surface of the cantilever beams 111 and 112 and the non-engaging side The partial side surface of the half portion 123 is formed substantially continuously on a straight line. Further, a groove portion 124 is formed on both sides of the non-engaging side half portion 123 of the standby fixing member 120 so that a locking claw 133a, 133b of an anti-rotation member, which will be described later, can enter. A recess (not shown) that latches with the claws 133a and 133b is formed.
[0024]
Further, ring-shaped thin portions 120a and 120b are formed in the respective half portions of the standby fixing portion 120 (see dotted lines in FIG. 1). The thin-walled portions 120a and 120b can be punched out using a jig or the like, whereby this portion can be used as a bolt insertion hole if desired.
[0025]
This point will be described in more detail. When the standby fixing member 120 is attached to the liquid receiving surface of the pan, if the leakage is strong acid or strong alkali, the standby fixing member 120 is made of a metal such as a bolt from the viewpoint of corrosion resistance. It cannot be fixed with a fastener. Therefore, in this case, the standby fixing member 120 is firmly bonded to the bottom surface of the pan with an adhesive. At this time, since the ring-shaped thin portions 120a and 120b are not punched out, the adhesive can be bonded without overflowing from these portions. On the other hand, when the leaked liquid is not a corrosive liquid, the ring-shaped thin portions 120a and 120b can be punched out and the standby fixing member 120 can be firmly attached to the liquid receiving surface with bolts or the like.
[0026]
The rotation lock member 130 for preventing the leakage sensor main body 110 from rotating includes a plate-like upper surface plate 131 having a U-shaped notch 131a on the inner side in a plan view, and a lower portion of the outer peripheral edge of the upper surface plate 131 in the drawing. And a pair of cantilevers 111 and 112 of the leakage sensor main body 110 when the rotation lock member 130 is fitted into the standby fixing member 120 and the leakage sensor main body 110. Expansion in the width direction is regulated. Further, cantilever-like locking claws 133a and 133b are formed in the vicinity of the side wall portion of the upper surface plate 131, and once the rotation lock member 130 is fitted into the liquid leakage sensor main body 110 and the standby fixing member 120, the locking is performed. The claws 133a and 133b are latched in the locking recesses (not shown) of the standby fixing member 120 described above to prevent these parts from separating again.
[0027]
Further, the U-shaped notch 131a in the upper surface plate fits the rotation lock member 130 to the standby fixing member 120 when the standby fixing member 120 is fastened with a fastener such as a bolt by punching the ring-shaped punching portions 120a and 120b. This is a notch for preventing the fastener and the upper surface plate 131 from interfering with each other.
[0028]
Next, a method for attaching the liquid leakage sensor 1 having the above configuration to a liquid receiving surface such as a pan and the operation of the liquid leakage sensor 1 will be described.
[0029]
First, a method for mounting the leak sensor 1 will be described.
[0030]
First, a pan (not shown) as a liquid receiving container is fixed at a position where the liquid is easily leaked in the apparatus or equipment, and a waiting fixing member 120 is attached at an appropriate position on the liquid receiving surface. In this attachment, when the leaking liquid is a corrosive liquid such as strong acid or strong alkali, it is preferable to fix the standby fixing member 120 to the liquid receiving surface with an adhesive without using a fastener such as a bolt. In this case, the standby fixing member 120 can be fixed to the liquid receiving surface without punching out the ring-shaped thin portions 120a and 120b. On the other hand, for other liquids, the ring-shaped thin portions 120a and 120b are punched out and the standby fixing member is fixed to the pan with a fastener such as a bolt.
[0031]
Subsequently, the cantilever beams 111 and 112 of the leakage sensor main body 110 are engaged with the engagement half portion 122 of the standby fixing member 120. Then, the lock member 130 is pushed from the non-engaging half portion 123 of the standby fixing member 120. As a result, both side walls of the lock member 130 restrain the cantilevers 111 and 112 as shown in FIG. That is, the width between the end portions of the cantilever beams 111 and 112 is regulated to a certain amount by the lock member 130. Therefore, even if the derived cord is accidentally hooked and a large bending moment is applied to the leak sensor 1, the distance between the cantilever ends increases, and the leak sensor body deviates from the standby fixing member. Never do.
[0032]
Subsequently, a liquid leakage sensor according to a second embodiment of the present invention will be described.
[0033]
In the following description, the components equivalent to those of the liquid leakage sensor 1 according to the first embodiment described above are denoted by corresponding reference numerals and detailed description thereof is omitted.
[0034]
As shown in FIG. 3 and FIG. 4, the leak sensor 2 according to the second embodiment of the present invention can be engaged with the leak sensor body 210, the leak sensor body 210, and can receive the leak liquid. A standby fixing member 220 attached to the upper surface of the pan, which is a surface, and a transition lock member (third regulating means) 230 for preventing the liquid leakage sensor main body 210 from being separated from the standby fixing member 220 are provided.
[0035]
The liquid leakage sensor main body 210 in FIG. 3 is a type using an optical fiber, and includes an optical fiber, a light projecting / receiving end, a prism for changing an optical path, and the like inside a main body not shown.
[0036]
Further, an optical fiber 240 covered with a protective sheath is led out from a predetermined position around the leak sensor main body (see FIG. 4). Moreover, the leak sensor main body 210 is made of a fluororesin from the viewpoint of chemical resistance and corrosion resistance.
[0037]
The leak sensor main body 210 has an elongated outer shape with a substantially elliptical cross section, and a pair of cantilever beams 211 and 212 are formed to protrude laterally from one side surface thereof. The pair of cantilevers 211 and 212 are complementary in shape to a standby fixing member 220 described later. Further, locking projections 211a and 212a with the transition lock member are formed on the base end portions of the cantilever beams 211 and 212, respectively, so as to protrude outward.
[0038]
On the other hand, the standby fixing member 220 that engages with the leak sensor main body 210 is also made of a fluororesin from the viewpoint of chemical resistance and corrosion resistance, and has two rectangular cantilevers 211 and 212 in the leak sensor main body 210 in a plan view. It has a width dimension that can be sandwiched between.
[0039]
A step portion (first restricting means) (not shown) is formed at the engaging portion of the standby fixing member 220 with the cantilever beams 211 and 212, and the liquid leakage sensor main body 210 of the standby fixing member 220 is formed by this step portion. It is not spaced apart from the top surface in the vertical direction.
[0040]
In addition, a ring-shaped thin portion 220a is formed on the upper surface of the standby fixing member 220 as in the first embodiment (see dotted lines in FIGS. 3 and 4). The ring-shaped thin portion 220a can be made into a bolt insertion hole by punching when the standby fixing member 220 is attached to the liquid receiving surface of the pan with a fastener such as a bolt.
[0041]
The transition lock member 230 has a rectangular shape in a plan view and includes a top plate 231 provided with a bolt insertion hole 231a at a substantially central portion, a transition regulating pressing portion 232 suspended from a long side portion of the top plate 231, And a locking claw 233 hanging from both short sides of the face plate 231.
[0042]
The transition lock member 230 is also made of a fluororesin from the viewpoint of corrosion resistance and chemical resistance.
[0043]
Each locking claw 233 includes two locking pieces 233a and 233b, and latch portions 233c and 233d are formed at the ends of the locking pieces 233a and 233b so that the transition locking member does not deviate from the standby fixing member 220. ing.
[0044]
The locking claw 233 of the transition lock member and the transition restricting pressing portion 232 are the transition regulating press when the locking claw 233 of the transition locking member is locked to the locking projections 211a and 212a of the cantilever. The portion 232 has a positional relationship in contact with the side portion of the standby fixing member 220.
[0045]
Then, the attachment method and effect | action of this leak sensor 2 are demonstrated.
[0046]
Similar to the above-described embodiment, the pan is fixed at a position where the apparatus or equipment is liable to leak, and the standby fixing member 220 is attached on the liquid receiving surface.
[0047]
Subsequently, the cantilever beams 211 and 212 of the leakage sensor main body 210 are engaged with the standby fixing member 220. Then, the transition lock member 230 is attached to the standby fixing member 220 from above the standby fixing member 220. As a result, the locking claw 233 of the transition locking member 230 is locked to the cantilever locking projections 211a and 212a, respectively, and the transition restricting pressing portion 232 comes into contact with the side of the standby fixing member 220 and waits. The separation between the fixing member 220 and the leak sensor main body 210 is prevented. Thus, even if the optical fiber 240 of the leak sensor 2 is pulled for some reason, the leak sensor body 210 does not deviate from the standby fixing member 220.
[0048]
Subsequently, a liquid leakage sensor according to a third embodiment of the present invention will be described.
[0049]
As shown in FIG. 5, the leak sensor 3 according to the third embodiment of the present invention includes an amplifier built-in type leak sensor body 310 that is the same as the leak sensor body 110 according to the first embodiment. A lock lever (second restricting means and third restricting means) 330 that prevents the leakage sensor main body 310 from rotating and prevents the change to the standby fixing member 320 is rotated at the base end portions of the cantilever beams 311 and 312. It is attached freely. Further, the cantilever beams 311 and 312 are restricted from moving relative to the standby fixing member 320 in a direction perpendicular to the liquid receiving surface by an interference step (first restricting means) (not shown).
[0050]
The lock lever 330 is made of a fluororesin and has a substantially U shape in plan view. Further, a lock lever operating tongue 330a is formed to project at the free end of the lock lever 330, and the lock lever 330 can be easily locked to the standby fixing member 320 by pressing the tongue 330a downward. . The tongue piece 330a does not need to be formed at the free end portion of the lock lever 330, and may be provided at both side portions of the lock lever 330, for example, from the viewpoint of improving the mounting workability.
[0051]
Before the leak sensor body 310 is engaged with the standby fixing member 320, that is, in the leak sensor body 310 alone, the lock lever 330 is cantilevered by a frictional force acting between the lock lever 330 and the cantilever beams 311 and 312. The state is slightly inclined upward with respect to the beams 311 and 312. As a result, when the leak sensor main body 310 is engaged with the standby fixing member 320, the lock lever 330 does not hinder the engaging operation, and the attachment of the leak sensor 3 can be improved.
[0052]
Further, since the lock lever 330 is attached to the leak sensor body 310, the lock lever 330 itself is different from the leak sensor 1 according to the first embodiment and the leak sensor 2 according to the second embodiment. It is hard to lose and contributes to the improvement of installation workability.
[0053]
Since the leak sensor 3 having such a structure has a shape in which the inside of the lock lever 330 complementarily matches the outer shape of the standby fixing member 320, the leak sensor main body 310 is temporarily attached to the standby fixing member 320. If the lock lever 330 is engaged with the lock lever 330, the leak sensor body 310 may rotate or change relative to the standby fixing member 320 even if the cord 340 of the leak sensor 3 is pulled for some reason. Absent.
[0054]
Next, the liquid leakage sensor 4 according to the fourth embodiment shown in FIG. 6 will be described. In the liquid leakage sensor 4 according to the fourth embodiment, the liquid leakage sensor main body 410 and the standby fixing member 420 have substantially the same configuration as the liquid leakage sensor main body 210 and the standby fixing member 220 according to the second embodiment. Yes. The cantilever beams 411 and 412 are restricted from moving in the direction perpendicular to the liquid receiving surface by an interference step (first restricting means) (not shown) with respect to the standby member 420. Further, step portions 411b and 412b as stoppers in the rotation direction of the lock wire 430 described below are formed at the tip portions of the cantilever beams 411 and 412 of the leak sensor main body.
[0055]
Further, the leak sensor main body 410 is provided with a lock wire (second restricting means and third restricting means) 430 in order to prevent the leak sensor main body 410 from rotating or detached from the standby fixing member 420. The lock wire 430 is formed by bending a metal wire having a certain degree of rigidity into a square U shape, and hinges 430a, which engage with the cantilever protrusions 411a, 412a by bending both ends. 430b.
[0056]
Also in the leak sensor 4 having such a structure, once the leak sensor main body 410 is attached to the waiting fixing member 420 and both are locked by the lock wire 430, one side 431 of the lock wire 430 contacts the waiting fixing member 420. To come. Therefore, even if the optical fiber 440 of the liquid leakage sensor 4 is pulled, the liquid leakage sensor main body 410 does not change with respect to the standby fixing member 420.
[0057]
Like the lock lever 330 according to the third embodiment, the lock wire 430 is cantilevered with the lock wire 430 before the leak sensor body 410 is engaged with the standby fixing member 420, that is, the leak sensor body 410 alone. The lock wire 430 is kept slightly inclined upward with respect to the cantilever beams 411 and 412 against the gravity by the friction force acting between the beams 411 and 412, and as a result, the lock wire 430 is attached during the mounting operation. Is not necessary to be supported by hand, and the attachment of the leak sensor 4 can be improved particularly when mounting in a space where the vertical direction is narrow.
[0058]
Since the lock wire 430 can be manufactured using a commercially available wire, it is not necessary to mold the lock lever 330 having a special shape as shown in FIG. 5 as a dedicated product, and an inexpensive material can be used. Contributes to cost reduction. Moreover, as shown in FIG. 7, a wire shape can be selected as appropriate. In FIG. 7A, the lock wire 430 exerts a regulating force on the cantilever beams 411 and 412 in the direction of the symbol F in the figure, and the leak sensor main body 410 is in the direction of the drawing with respect to the waiting member 420. It becomes impossible to rotate. In FIG. 7B, the lock wire 430 exerts a regulating force on the waiting member 420 in the direction of the symbol F ′ in the drawing, so that the cantilever beams 411 and 412 and the waiting member 420 cannot be separated. Alternatively, both are possible (FIG. 7C).
[0059]
Various modifications can be made to the structure and material within the scope of the present invention, and the present invention is not limited to the above-described embodiments.
[0060]
【The invention's effect】
  As described above, the liquid leakage sensor according to the present invention isThe second restricting means has a substantially U-shaped shape, and both ends of the substantially U-shaped second restricting means have the base end portions of the pair of cantilevers or the vicinity thereof as a pivotal fulcrum. It is pivotally attached to the main body, and the disengagement direction of the second restricting means and the expanding direction of the cantilever are in different planes.Since the front ends of the pair of cantilevers engaged with the fixing member are simultaneously restricted from expanding in the width direction, the end of the cantilever can be reliably prevented from expanding. Therefore, even if the optical fiber or the lead wire is caught, the liquid leakage sensor main body does not rotate with respect to the standby fixing member. Therefore, the leak sensor main body does not come off from the standby fixing member.
  Further, since the second restricting means is rotatably connected to the leak sensor main body, the second restricting means is not lost and the mounting workability is not deteriorated.
[0061]
  Moreover, the liquid leakage sensor according to claim 2 of the present invention isThe third restricting means has a substantially U-shaped shape, and both ends of the substantially U-shaped third restricting means are at the base ends of a pair of cantilevers or in the vicinity thereof as a fulcrum. It is rotatably attached to the main body, and the disengagement direction of the third restricting means and the separation direction along the sensor attachment surface of the cantilever are in different planes.Since the pair of cantilever beams are separated from the fixing member along the liquid receiving surface, the leak sensor body is awaited and fixed even if the optical fiber or lead wire is pulled carelessly. It does not come off the member.
  Further, since the third restricting means is pivotably connected to the liquid leakage sensor main body, the third restricting means is not lost and attachment workability is not deteriorated.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a liquid leakage sensor according to a first embodiment of the present invention in a state immediately before attaching a locking member.
FIG. 2 is a perspective view showing the liquid leakage sensor according to the first embodiment of the present invention with a locking member attached.
FIG. 3 is a perspective view showing a liquid leakage sensor according to a second embodiment of the present invention in a state immediately before attaching a locking member.
FIG. 4 is a perspective view showing a liquid leakage sensor according to a second embodiment of the present invention with a locking member attached.
FIG. 5 is a perspective view showing a liquid leakage sensor according to a third embodiment of the present invention with a locking member attached.
FIG. 6 is a perspective view showing a liquid leakage sensor according to a fourth embodiment of the present invention with a locking member attached.
7 is a schematic plan view showing a modified example of the lock wire in FIG. 6. FIG.
[Explanation of symbols]
1-4 Liquid leakage sensor
110 Leak sensor body
110a top surface
111, 112 cantilever
120 Standby fixing member
120a, 120b Thin part
121 Base
122 engagement half
123 Non-engaging side half
124 Groove
130 Locking member
131 Top plate
131a Notch
132 Side wall
140 codes
210 Leak sensor body
211,212 Cantilever
211a, 212a Locking projection
220 Standby fixing member
220a Ring-shaped thin part
230 Transition lock member
231 Top plate
232 Control part for transition regulation
233 Locking claw
233a, 233b Locking piece
233c, 233d Latch part
310 Leak sensor body
311, 312 cantilever
320 Standby fixing member
330 Lock lever
330a tongue
410 Leak sensor body
420 Standby fixing member
421,422 cantilever
421b, 422b Stepped part
430 Lock wire
430a, 430b Hinge part

Claims (2)

A liquid leakage sensor main body capable of detecting the presence or absence of liquid leakage on the liquid receiving surface;
In a liquid leakage sensor that is attached to a liquid receiving surface and includes a fixing member that waits and fixes the liquid leakage sensor main body,
The leak sensor body has a pair of cantilevers that can be engaged with the fixing member in a non-rotatable state,
The fixing member has first regulating means for preventing the pair of cantilevers engaged with the fixing member from being separated from the liquid receiving surface,
And, wherein the leakage sensor is to have a second regulating means for the tip portions of the pair of cantilever engaged with the fixing member to regulate the expanding in the width direction at the same time,
The second restricting means has a substantially U-shaped shape, and both ends of the substantially U-shaped second restricting means have the proximal ends of the pair of cantilever beams or the vicinity thereof as pivot points. Attached to the leak sensor body so that it can rotate freely.
The disengagement direction of the second restricting means and the expansion direction of the cantilever are in different planes, thereby preventing the expansion of each tip of the cantilever. Leak sensor. A liquid leakage sensor main body capable of detecting the presence or absence of liquid leakage on the liquid receiving surface;
In a liquid leakage sensor that is attached to a liquid receiving surface and includes a fixing member that waits and fixes the liquid leakage sensor main body,
The liquid leakage sensor body has a pair of cantilevers engageable with the fixing member,
The fixing member has first regulating means for preventing the pair of cantilevers engaged with the fixing member from being separated from the liquid receiving surface,
And, wherein the leakage sensor is to have a third regulating means for regulating the relative said stationary member, the pair of the cantilever is spaced along the sensor mounting surface,
The third restricting means has a substantially U-shaped shape, and both ends of the substantially U-shaped third restricting means have the proximal end portions of the pair of cantilevers or the vicinity thereof as a rotation fulcrum. Attached to the leak sensor body so that it can rotate freely.
The disengagement direction of the third restricting means and the separation direction along the sensor attachment surface of the cantilever are in different planes, so that the cantilever is separated from the fixing member along the sensor attachment surface. A liquid leakage sensor characterized in that it can be prevented .

Images