Hochiki Corporation

Keisuke Washizu

Manabu Dohi

Tomohiko Shimadzu

Hiroki Masuzawa

Hideki Takano

Yasuharu Fujiwara

Tomohiko Shimazu

A detectorincludes an outer cover; and a light emitter that outputs information by causing at least a part of the detectorto emit light, wherein the light emitter causes at least a protective portionto emit the light, the protective portionaccommodating a thermistor that detects a physical quantity of a detection target, and protruding from the outer cover, the protective portionguides the light from the light emitter, and emits the light, the detectorfurther includes a light guide portionformed in at least a part of the outer cover, and the light emitter causes the light guide portionto emit the light, and a light emitting surface of the light guide portionextends from a front portion side of the outer coverto a side portion side of the outer cover, and the light emitting surface of the light guide portionhas a linear shape when viewed from the front portion side of the outer cover

Disaster prevention apparatus to detect fire outbreak or gas leakage

A sensoris a fire detection apparatus attached to a ceiling surface, and includes an inflow spaceprovided inside the sensor, a detection spacefor detecting a detection target, the detection spacebeing provided at a position on a ceiling surfaceside of the inflow spaceon the inside of the sensor, an inner coverfor housing the detection space, the inner coverbeing capable of allowing gas containing the detection target to flow into and out of the detection spacethrough the inflow space, an outer coverfor housing the inner cover, the outer coverbeing capable of allowing the gas to flow into and out of the inflow space, and a suppressorprovided in the inflow spaceand formed integrally with the outer cover, the suppressorbeing used to suppress inflow of moisture contained in the gas into the detection space

Fire detection apparatus

A detectorincludes: an outer cover; and an indicator that outputs at least information about a test of a disaster prevention apparatus by emitting light, and that is provided in the outer cover, wherein when at least a part of the outer coveris covered with a test apparatus in order to perform the test of the detector, at least a part of an indication surface of the indicator is exposed to an outside of the test apparatus and the indicator is formed in a side portion of the outer cover, the indicator is formed in an edge portion of a front portion of the outer cover, and the indicator is a part of a light guide portionthat is formed in the outer cover, and that guides light from a light emitter.

Disaster prevention apparatus

An occurrence spaceA which is provided in a light shielding spaceA shielded from light from an outside and into which a detection target flows, a first light emitting unitA and a second light emitting unit that emit detection light along a first light emitting-side optical axisA and a second light emitting-side optical axis toward an occurrence spaceA, a light receiving unit that receives scattered light generated when detection light emitted from the first light emitting unitA and the second light emitting unit is scattered by a detection target flowing into the occurrence spaceA along a light receiving-side optical axis intersecting the first light emitting-side optical axisA and the second light emitting-side optical axis, and a smoke detection unit cover-side inclined portionA that primarily reflects the detection light emitted from the first light emitting unitA and the second light emitting unit in a direction intersecting a plane defined by the first light emitting-side optical axisA, the second light emitting-side optical axis, and the light receiving-side optical axis are included.

Fire detection device

Provided is a sensorprovided with a detection elementfor detecting heat of a heat air current generated in association with a fire in a monitoring area, in which the detection elementis disposed so that a detector protrudes from a predetermined base portion of the sensor, the sensorincludes a control structure that has a stepped portion higher than the predetermined base portion, the control structure being configured to guide the heat air current to the detector of the detection elementalong an outer peripheral wall of the stepped portion, at least a part of the detector of the detection elementis located on a base portion side lower than the uppermost step of the stepped portion, a labyrinth portion guides the heat air current to the detector of the detection elementalong a side end portion corresponding to an outer peripheral side of the stepped portion of a plurality of partition walls, and the heat air current containing smoke introduced into the labyrinth portion is introduced to the smoke detector disposed in a lower part of the control structure via an opening penetrating the stepped portion of the control structure from an upper surface to a lower surface side.

Smoke detector cover for fire alarm

Smoke detector for fire alarm

A fire detection apparatusincludes a first light emitting unitthat irradiates a detection space located inside or outside the fire detection apparatuswith first detection light, a second light emitting unitthat irradiates the detection space with second detection light having a different wavelength from a wavelength of the first detection light, a light receiving unitthat receives scattered light of the first detection light irradiated from the first light emitting unitdue to smoke, outputs a first light receiving signal according to the received scattered light, receives scattered light of the second detection light irradiated from the second light emitting unitwith respect to smoke, and outputs a second light receiving signal according to the received scattered light, and an identification unitthat identifies a type of smoke present in the detection space on the basis of an output ratio of an output value of the first light receiving signal to an output value of the second light receiving signal output from the light receiving unitand a rising rate of the output value of the first light receiving signal or the second light receiving signal.

Provided is a detectorattached to an installation surfaceof a ceiling, the detectorhaving an attachment surfacefacing the installation surface, in which the detectorincludes a light shielding spaceinto which smoke flows, a light emitting unitand a light receiving unitthat detects smoke flowing into the light shielding space, an outer coverthat accommodates the light emitting unit, the light receiving unit, and the light shielding space, an outer cover-side inner side inflow/outflow openingand an outer cover-side outer side inflow/outflow openingthat allow gas containing smoke to flow into and flow out of the light shielding space, the outer cover-side inner side inflow/outflow openingand the outer cover-side outer side inflow/outflow openingbeing provided toward an opposite side from the attachment surfacein the outer coverwith reference to a direction substantially orthogonal to the attachment surface, and a main body-side inclination portionand a guide portion-side inclination portionthat guide gas so that gas flows into the light shielding spacethrough the outer cover-side inner side inflow/outflow openingand the outer cover-side outer side inflow/outflow opening

Growing community of inventors

Iwanuma, Japan

Keisuke Washizu