Hochiki Corporation

Hitachi Industrial Equipment Systems Co., Ltd.

Hochiki Kabushiki Kaisha

Manabu Dohi

Keisuke Washizu

Toshiki Shirahata

Ryosuke Mikoshiba

Tomohiko Shimadzu

Toshiaki Takahashi

Hiroshi Shima

Tetsuya Nagashima

Hideki Takano

Kenichi Souma

Yasuharu Fujiwara

Kazuyuki Fukui

Kenji Nakanoue

Hiroyuki Endou

Tooru Honma

Makoto Shinohara

Eisuke Maruyama

Yasuo Ohmori

Masanao Kuwabara

Hidemasa Yamaguchi

Tatsuhito Azegami

Yoshimi Kawabata

Yuuji Satou

Kouhei Satou

Hiroshi Honma

Naoya Matsuoka

Hidenari Matsukuma

Naoto Yamano

Kiyoaki Koyama

Masahiko Nemoto

Tomohiko Shimazu

Takayiki Kondo

Takayuki Kondo

Hiroyuki Kase

Hiroyuki Tatsuno

David Brown

Stephen Cox

Adrian Leyshon

Inderprett Singh Pal

Leonard Manning

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

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.

Fire detection apparatus

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

Sensor

To provide a detector capable of reliably inducing a gas containing a detection target to a detection space. A detector which is attached to an installation surface of an installation target and has an attachment surface facing the installation surface includes a detection space into which a detection target flows; a light-emitting portion and a light-receiving portion which detect the detection target flowing into the detection space; a casing which accommodates the light-emitting portion, the light-receiving portion and the detection space; and a rib, an inclined surface, a light shielding portion, a casing side inflow opening, a substrate side outflow opening, a casing side outflow opening, a back plate, and the like which induce gas outside the casing, which is gas containing the detection target, to flow into the detection space inside the casing from an opposite side of the attachment surface of the casing and to flow out from the side of the attachment surface of the casing in a direction substantially orthogonal to the attachment surface.

Detector

Smoke detector

A composite fire detector () which senses a heat temperature, smoke concentration, and gas concentration due to fire is connected to a transmission path () drawn from a fire receiver (). When a fire test operation is sensed by the fire receiver, a test mode is set to the fire detector. The fire detector performs display control over alarm indicating lights in a mutually varied manner corresponding to each alarm test when a test jig is used to conduct an alarm test by sensing of a heat temperature, an alarm test by sensing of a smoke concentration, and an alarm test by sensing of a gas concentration in a state where the test mode is set. For example, the fire detector repeats one-time blinking of the alarm indicating lights for heat sensing, two-time blinking for smoke sensing, and three-time blinking for gas sensing at intervals of a predetermined nonoperating period.

Fire notification system and test method using test jig therefor

Fire alarm

Transformer housing

Disclosed is a wound iron core () for a static apparatus in which magnetic paths in the inside of the wound iron core are subdivided to improve iron core characteristics. The iron core () is configured by using two or more kinds of magnetic materials (to) with different magnetic permeabilities to form laminated blocks with single plates or a plurality of laminated plates and by alternately arranging the laminated blocks with different magnetic permeabilities from the inner circumference. An iron core material () with large magnetic permeability out of iron core materials with different magnetic permeabilities is arranged on the inner circumference side. Further, when the iron core materials with different magnetic permeabilities are alternately arranged, the iron core materials () with the same magnetic permeability are configured to gradually change in thickness to ease an excessive magnetic flux density distribution in the iron core. A ring-shaped iron core is configured such that a plurality of block-like laminated members, which are each formed by laminating a plurality of strip-like amorphous material thin plates, are laminated and formed into a ring shape and a sheet-like non-magnetic insulation material is arranged between the n-th (n: an integer of two or more) layer of the ring-shaped block-like laminated members from the most inner circumference side and the (n+1)-th layer of the ring-shaped block-like laminated members from the most inner circumference side.

Wound iron core for static apparatus, amorphous transformer and coil winding frame for transformer

This smoke detector is provided with: a plurality of light emitting devices which emit light beams of mutually different wavelengths; and a plurality of scattered light receiving sections which receive, at a different scattering angle for each light beam of the respective wavelengths, scattered light generated due to the plurality of light beams emitted simultaneously from these light emitting devices impinging on smoke.

Fire detector

Growing community of inventors

Tokyo, Japan

Manabu Dohi