Abstract: The present invention relates to a system for preventing semitrailer collisions with a loading ramp (10). The system comprises a sensor (100) and guide block (200). The sensor (100) is configured for sensing when the rear end of a semitrailer (12) is approaching a loading ramp (10). The guide block (200) is adapted to be positioned on the ground, and is here shown positioned laterally to the opening of the loading ramp (10). The guide block (200) comprises wheel blocking means (210) configured for supporting the tread of a rear tire of the semitrailer (12). The wheel blocking means (210) is configured to move from a forwarded position relative to the loading ramp (10) to a retracted position relative to the loading ramp (10) as the semitrailer (12) is reversing towards said loading ramp (10).

Abstract: A sheet feeding apparatus includes a sheet supporting portion, a rotary feeding member, a rotary separation member, a support member configured to support a rotation shaft of the rotary separation member, a swing shaft configured to support the support member, a frame member including a first support portion configured to fix a first end portion of the swing shaft and a second support portion configured to movably support a second end portion of the swing shaft, and an adjustment mechanism including a long hole formed in the second support portion and a fixing member configured to fix the second end portion of the swing shaft to the frame member. The second end portion of the swing shaft can be fixed at a plurality of positions to the second support portion with the fixing member.

Abstract: A placement method using a placement device provided with a first process of pressing a transfer plate a topmost layer sheet member so as to pick up it when a restraint device is rendered a restraining state, a second process of rendering the restraint device a non-restraining state to render the transfer plate an inclined state while pressing down the plurality of sheet members from above in the stacking direction by a base end part side of the transfer plate rendered the inclined state, a third process of inserting the restraining blade into the space formed between the topmost layer sheet member and the sheet member of the layer below it and again render the restraint device the restraining state, and a fourth process of making the transfer plate retract upward while returning it to the horizontal state and transferring the topmost layer sheet member to the holder.

Abstract: An image forming apparatus includes an image forming unit, an apparatus main body, a conveyance unit, an opening/closing member, a discharge unit, and a stack tray. The conveyance unit conveys a sheet to the image forming unit. The opening/closing member opens and closes relative to the apparatus main body, and, where the opening/closing member is in an open state relative to the apparatus main body, allow making access to the conveyance unit. The discharge unit discharges the sheet on which the image is formed. The stack tray is turned between a first position for stacking sheets on the stack face, and a second position with an angle formed between an underside opposite to the stack face and a horizontal plane that is larger than an angle of the first position, and includes an engagement portion to engage with the apparatus main body in the second position.

Abstract: A sheet conveyance device includes a conveyance roller pair to convey a sheet, a skew correction roller pair to correct a skew of the sheet in a state in which the skew correction roller pair is being stopped, first and second conveyance guides, and a protrusion. The first conveyance guide includes a bend contact portion to come into contact with a portion forming a bend on the first surface of the sheet. The second conveyance guides the sheet. The protrusion is disposed between the skew correction roller pair and the bend contact portion to come into contact with the first surface of the sheet. The protrusion protrudes toward the second conveyance guide from the first conveyance guide in a manner as to intersect with a straight line connecting two nip portions and the bend contact portion in a cross section perpendicular to a width direction.

Abstract: Provided is a sheet supply device capable of reliably joining sheets by accurately transmitting force for joining the sheets. A joining mechanism includes a pressing roller that presses a sheet of a supply side roll against the outer peripheral surface of a standby side roll; and a moving unit that supports the pressing roller such that the pressing roller is configured to approach and move away from the standby side roll supported by a support shaft disposed at a splice position in the radial direction of the standby side roll. The moving unit supports the pressing roller such that the center of the pressing roller is movable on a straight line passing through the center of a rotation shaft and the center of the support shaft disposed at the splice position.

Abstract: A relay conveyance device includes a discharge unit which discharges a sheet toward a carry-in port, a decurling unit attached to the discharge unit, and a discharge adjustment mechanism capable of adjusting a height direction inclination of the discharge unit. The discharge adjustment mechanism is set to be capable of adjusting an inclination of the discharge unit such that the decurling unit maintains a predetermined reference position even when the discharge unit is supported by any of a plurality of unit supporting portions set according to a height position of the carry-in port.

Abstract: An apparatus for lifting, maneuvering, winding or unwinding reels comprising a pair of devices having an elongated retractable frame having a first end and a second end which are adjustable relative to one another; a first crossbar having two opposite ends, the first crossbar being mounted to a first end of the elongated retractable frame; a second crossbar having two opposite ends, the second crossbar being mounted to a second end of the elongated retractable frame; a first roller carrier mounted on the first crossbar; a second roller carrier mounted on the second crossbar, parallel to the first roller carrier, wherein the roller rotates axially about the roller carrier; and a means for adjusting the first and second end of the elongated retractable frame relative to one another so that the first and second ends of the elongated retractable frame are moved closer together and further apart.

Abstract: Holders for wound cables. The holders include retention features to control the rate at which cable windings are unwound during cable deployment. In some examples, the cable holder includes a pair of spaced apart spools and the cable is wound in windings configured as figure-8's. In some examples, the retention features include flexibly resilient fingers positioned to contact the windings at one or more retention points positioned at a deployment end of the holder.

Abstract: An electrical cord storage device is adapted to be affixed to an electrical appliance. The device includes a base having a first surface shaped to substantially conform to and adapted to be affixed to a surface of an electrical appliance and a second surface opposed to the first surface. The device also includes a post having a first end affixed to the base and extending from the second surface of the base to a second end to form a cord-wrapping structure adapted to receive an electrical cord of the electrical appliance wound thereon. The device further includes a dome affixed to the second end of the post, extending radially away from the post, and curving toward an imaginary plane substantially normal to the post located at the first end of the post. Other implementations are described.

Abstract: A strap feeding device includes first driving and driven rollers, second driving and driven rollers, an actuating unit, and a detecting unit. The actuating unit can move the second driving roller between a released position, where the second driven roller is spaced apart from the second driving roller, and a contact, where the second driven roller contacts the second driving roller and is co-rotatable with the second driving roller to clamp and move a strap. The control device controls rotation of the first and second driving rollers to feed and return the strap, detects rotation of the first driven roller, and controls the actuating unit to move the second driven roller to the contact and released positions.

Abstract: A hose-used hose-reeling apparatus includes a base, a reel, a conduit assembly and a communication element. The reel is supported on the base. The conduit assembly includes a conduit and a shackle. The conduit extends in the base and includes a horizontal tube and a vertical tube. The horizontal tube includes an insertion section and an abutment section. The insertion section includes at least one hook inserted in a slot in the base. The abutment section includes an end for abutment against a supporting element. The vertical tube extends in a peripheral aperture of the base from the insertion section. The shackle is movable between a releasing position disengaged from the insertion section and a locking position engaged with the insertion section. The communication element extends in the reel and covers a peripheral aperture in the insertion section as the reel is supported on the base.

Abstract: The electrical system between the battery and the tarp motor uses a significant amount of heavy cabling to deliver the power required. Disclosed are electrical systems to reduce the amount of wire necessary by employing the vehicle body for the electrical ground; momentarily configuring the battery bank to raise the voltage; and a control system to simplify the user interface.

Abstract: An elevator car 104 is provided which comprises an elevator control device 106 arranged to accept an elevator control command from a passenger in the elevator car 104. The elevator car is arranged to receive a query from a support provider 116; communicate said query to the passenger; and send a response to the support provider 116 based on passenger input provided via the elevator control device 106.

Abstract: A presence detection system includes a support layer operable to act as an underlying surface for supporting object(s), a sensor layer disposed beneath the support layer and operable to output readings indicating the presence of object(s) supported on the support layer and a controller for receiving the presence readings from the sensor layer and determining, based on the readings, an indicator of the occupancy status and/or an occupancy level of the support layer. The presence detection system can be used within an access gate system whereby the access gate is operated to a blocking position upon the presence detection system detecting more than one human supported on the support layer, this operation overriding a reading of an authenticated user token. The presence detection system can also be used within an elevator system wherein the elevator door subsystem and the elevator displacement subsystem are controlled based on an occupancy level detected by the detection system.

Abstract: In the modernization of a hall display device, the number of cables connected to operating equipment may increase since the shape and the number of pushbuttons, indicators and the like are changed. In this case, it is necessary to further process a hole at the worksite for passing the cables in accordance with the number of cables, which makes the work complicated. In the present invention, a frame having an opening in the center is fixed to a hall wall, and a front plate having operating equipment is fixed in a way as to cover the opening on the hall side of the frame. A back plate having a hole for passing cables is detachably fixed in a way as to cover the opening on the elevator hoistway side.

Abstract: An elevator car or counterweight, comprising a frame, the frame including an upright structure in which a safety brake is mounted so as to allow for lateral movement of the safety brake relative to the upright structure; at least a first vertically or obliquely extending cantilever spring; wherein a first end of the first cantilever spring is mounted to the upright structure; and wherein the first cantilever spring is arranged such that a point remote from the first end provides a biasing force to the safety brake when the safety brake moves away from a default position. As the safety brake is mounted to allow for lateral movement relative to the frame, the safety brake essentially floats relative to the car or counterweight.

Abstract: A stair lift device laid upon a staircase can support upward and downward movement of a platform of the device along stairs of the staircase. The device has two side supports in at least partial contact with the stairs of the staircase for supporting movement of the platform, and each side support can include a rail of the device along which the platform moves.

Abstract: The invention refers to a linear electric motor comprising at least one linear stator having stator teeth, which stator is designed to be located in a fixed correlation to an environment and extending over a movement path and, the linear electric motor further comprising at least one mover co-acting with and moving along the stator. According to the invention at least the top portion of the stator teeth facing the mover is inclined with respect to the normal of the stator beam.

Abstract: An elevator system includes an elevator car. A first drive assembly engages a first tension member. The first tension member is coupled to the elevator car and to a first counterweight. A second drive assembly engages a second tension member. The second tension member is coupled to the elevator car and to a second counterweight. The first tension member can be coupled to the elevator car at a first position and the second tension member can be coupled to the elevator car at a second position opposite the first position.

Abstract: Methods and system for tuning automatic doors are provided. Aspects includes receiving, by a controller, a request to open an automatic door, the request inputted to a first interface at a first location, determining an initial transfer time allowance (TTA), the initial TTA comprising an initial duration of time between a door open request time and a door closing start time, wherein the initial TTA is based on the first location, operating, by the controller, the automatic door to open and remain open until an expiration of the initial TTA, determining an occurrence of a transfer, wherein the transfer occurs at a first time point, determining whether the transfer is associated with the request, storing, in a memory, the first time point, and determining an adjusted TTA based on the first time point for the at least one transfer, wherein the adjusted TTA is associated with the first interface.

Abstract: An installation device used in an elevator shaft has a first carrier with first and second carrier ends, a support element pivotably arranged on the first carrier end, and a holding apparatus holding a displacement apparatus by which installation material can be displaced in the elevator shaft. When the installation device is in an installation position, the first carrier end is supported against a threshold of an elevator shaft door opening by the support element and the second carrier end is supported at least indirectly against a shaft wall that is opposite the door opening. The holding apparatus is arranged on an upper side of the installation device in the installation position such that the displacement apparatus is supported from above on the holding apparatus.

Abstract: A system for lifting shipping containers each having corner fittings provided with lifting/fastening apertures, the system including lifting means for lifting en masse a matrix of containers including two or more columns of vertically connected containers, each column being at least two containers high. The lifting means uses the lifting apertures provided on the top of the top container in each column, and connecting means are provided for connecting each column transversely to each adjacent column to hold the columns together and prevent toppling of the columns relative to each other. A method of lifting is also disclosed together with a lifting beam and trailer and for use in handling containers.

Abstract: A system for use on a load moving machine. A first sensor node having at least one sensor, a second sensor node having at least one sensor. The first and second sensor nodes are placed on first and second fixed locations with respect to the lifting machine such that the first and second sensor nodes utilize their respective sensors, to report current geometric data with respect to the load moving machine.

Abstract: According to some embodiments, a winch tightening apparatus comprises a mounting plate; a first moment arm coupled to the mounting plate and configured to provide leverage for rotating the mounting plate; and a pawl comprising a first end and a second end. The first end is pivotally coupled to the mounting plate such that the second end pivots to engage a ratchet gear when the mounting plate is rotated in a first direction and pivots to disengage the ratchet gear when the mounting plate is rotated in a second direction opposite the first direction. Some embodiments include a second moment arm coupled to the mounting plate and configured to provide leverage for rotating the mounting plate.

Abstract: A winch assembly including a mount attachable to a vehicle, and a guide attached to the mount; including a winch having a drum for winding and unwinding a line, and a motor for driving the drum about a winding axis, wherein the drum has a helical groove for receiving the line as it is wound. A frame connects to the first and second end of the drum and is adapted to move relative to the guide so as to synchronize movement of the drum along the winding axis so that the line is aligned with the helical groove during winding and unwinding. A rod is attached to the frame and generally parallel to the winding axis, and passes through a hole in the guide, allowing the movement of the drum along the winding axis but preventing the frame from rotating about the winding axis is disclosed.

Abstract: A rope guiding device for guiding a rope on a rope drum, the rope drum being adaptable to rotate about a drum axis to wind the rope around the rope drum or from the rope drum to hoist and lower a load adapted on the rope, includes at least guiding element, and an actuator for generating a rope guiding force, which force affects each guiding element in the direction of the drum axis so that the movement of each guiding element in the direction of the drum axis may be guided by the force.

Abstract: An apparatus for lowering a hitch onto a truck bed and raising the hitch off of a truck bed is disclosed. The apparatus includes: an upper carriage, a lower carriage, and a kingpin. The upper carriage is suspended from multiple lines, which lines are configured to lower and raise the upper carriage. The lower carriage is attachable to the upper carriage at various positions relative to the upper carriage to allow the load on the lines to be balanced in one direction. The kingpin is attached to the lower carriage, and kingpin is configured to be captured by the hitch. Allowing the hitch to be lowered onto the truck bed and raised off of the truck bed as the upper carriage and the lower carriage are lowered and raised by the lines. Another embodiment of the apparatus includes lifting devices attached to the lines for raising and lowering the hitch.

Abstract: An overhead storage device comprising a cable pulley; a constant torque spring unit attached to the cable pulley and adapted to apply an approximately constant torque to the cable pulley; a cable partially wound around the cable pulley and having an attachment mechanism at one end of the cable; and a locking mechanism; comprising a pawl, a release cord attached the pawl and a ratchet unit; adapted to permit the attachment mechanism and an attached load to be lowered and locked at any desired position within the range of the device. The device is particularly suited for storing items, such as bicycles, golf clubs and yard equipment that are commonly stored in garages.

Abstract: The present invention is directed to a motorcycle axle holder assembly device for use with a motorcycle stand. The assembly device includes a plate and a cylindrical section positioned on the plate. The cylindrical section has an opening configured to be attached to a cylindrical member extending from the motorcycle stand. The device has a generally C shaped longitudinal opening with a base adjacent to the cylindrical section and a pair of arcuate arms extending from the base. The C shaped longitudinal opening is configured to suspend an end of the motorcycle axle off the surface when inserted therethrough.

Abstract: To realize a fork lift device capable of contributing to space-saving for an aisle width at a warehouse. A fork lift device according to an embodiment of the present includes: a first fork and a second fork moveable in a lateral direction and a vertical direction with respect to a traveling direction; and an interchanging mechanism configured to interchange vertical positions of the first fork and the second fork.

Abstract: Disclosed herein are various forms of beverage tools. The beverage tools comprise a bottle cap remover portion to remove a bottle cap from a bottle and a solids remover portion for removing debris from the inside of a bottle. The solids removal portion comprises a post extending from the bottle cap remover portion. At a distal end of the post are one or more barbs extending from a lateral side of the post and swept toward the bottle cap remover portion. In one form, a rigid bottle opener is housed in a head housing from which the post extends. In another form the post and the rigid bottle opener are a single uniform part. A novel method for removing debris from a bottle using the beverage tools is disclosed.

Abstract: The present application provides a dispensing nozzle assembly for mixing a first fluid and a second fluid. The dispensing nozzle assembly may include a target assembly with a number of fins and a number of channels and a static mixer positioned about the fins.

Abstract: Apparatus for drawing beverages, particularly beer, contained in barrels with a limited capacity, having a washing device for a beverage dispensing circuit thereof. Such washing device includes a duct which can be connected to a water supply and is connected to a washing head arranged on the casing of the apparatus and that can be coupled to the connector of the dispensing circuit.

Abstract: A water dispensing apparatus includes: a filter; a hot water tank; a water discharge nozzle; a hot water pipe connecting the hot water tank to the water discharge nozzle; a hot water discharge valve; a drain pipe branched from the hot water pipe; a drain valve disposed at the drain pipe; a first temperature sensor disposed in the hot water tank and configured to detect a first temperature of the hot water tank or water in the hot water tank; a second temperature sensor disposed in the hot water discharge valve and configured to detect a second temperature of water that is in the hot water pipe or introduced into the hot water discharge valve; and a controller configured to control the hot water discharge valve and the drain valve based on temperature information including the first temperature and the second temperature.

Abstract: A gravity-fed fuel delivery system is provided. A central storage tank holds fuel to re-supply a number of pump trucks or other mechanized equipment, such as on a hydraulic fracturing location, and can be selectively raised or lowered. Hoses or other conduits extend from the central storage tank to individual fuel tanks of the equipment to be refueled. Adapters allow connection of the distal end of each hose or conduit to an inlet opening of a fuel tank. A float valve assembly senses when fuel inside an individual fuel tank is below a predetermined level, thereby mechanically opening a valve assembly to permit fluid to flow from the central storage tank, through a conduit, through the float valve assembly and into the fuel tank.

Abstract: A fluid dispensing nozzle including a nozzle body having a fluid path therein and a valve positioned in the fluid path and configured to selectively prevent or allow a flow of fluid through the fluid path. The nozzle further includes a manually operable actuator operatively connectable to the valve, a spout shell coupled to the nozzle body, and a fluid tube at least partially positioned in the spout shell and in fluid communication with or at least partially defining the fluid path. The nozzle further has a spacer at least partially positioned in the spout shell, a spout tip at least partially positioned in the spout shell, and a seal positioned between the spout tip and the spacer.

Abstract: A fluid dispensing nozzle including a nozzle body having a fluid path and a suction path therein. The nozzle has a valve positioned in the fluid path and configured to selectively prevent or allow a flow of fluid through the fluid path, and a manually operable actuator operatively connectable to the valve. The nozzle also includes a suction generator configured to apply a suction force in the suction path at a suction location. The suction path includes an expansion chamber located upstream of the suction location with respect to a direction of flow in the suction path. A bottom surface of the expansion chamber and a bottom surface of a portion of the suction path positioned immediately upstream of the expansion chamber are generally aligned.

Abstract: A packaged micro-electro-mechanical system (MEMS) device (100) comprises a circuitry chip (101) attached to the pad (110) of a substrate with leads (111), and a MEMS (150) vertically attached to the chip surface by a layer (140) of low modulus silicone compound. On the chip surface, the MEMS device is surrounded by a polyimide ring (130) with a surface phobic to silicone compounds. A dome-shaped glob (160) of cured low modulus silicone material covers the MEMS and the MEMS terminal bonding wire spans (180); the glob is restricted to the chip surface area inside the polyimide ring and has a surface non-adhesive to epoxy-based molding compounds. A package (190) of polymeric molding compound encapsulates the vertical assembly of the glob embedding the MEMS, the circuitry chip, and portions of the substrate; the molding compound is non-adhering to the glob surface yet adhering to all other surfaces.

Abstract: A sintered pelletized catalyst precursor comprising iron oxides, including haematite, and Cr2O3 and optionally one or more of Al2O3, ZnO, MnO2, MgO, and/or CuO, the pelletized catalyst precursor having an iron oxide content of 60 wt % to 95 wt %, when expressed as Fe2O3, and a Cr(VI) content of less than 0.1 wt %, is physically stable on ignition or when subjected to a reducing gas sufficient to reduce the haematite to magnetite.

Abstract: A synthesis gas plant for producing synthesis gas, said synthesis gas plant including an electrically heated reforming reactor system including a first catalyst active for catalyzing steam methane reforming reaction, said electrically heated reforming reactor system being arranged to receive a feed gas comprising hydrocarbons and outletting a first synthesis gas stream. The synthesis gas plant also includes a post converter downstream the electrically heated reforming reactor system, said post converter housing a second catalyst active for catalyzing steam methane reforming/methanation reactions and reverse water gas shift reaction, said post converter being arranged to receive at least part of said first synthesis gas stream and outletting a second synthesis gas stream. Furthermore, the synthesis gas plant includes means for adding a heated CO2 rich gas stream to the at least part of the first synthesis gas stream upstream the post converter and/or into the post converter.

Abstract: A method for producing a hydrogen chloride mixture containing hydrogen chloride and water, the method including: a first dehydration step of cooling a hydrogen chloride mixture in which a concentration of water is 1 mol ppm or more, to condense and separate water in the hydrogen chloride mixture; a second dehydration step of bringing a hydrogen chloride mixture obtained in the first dehydration step into contact with a water adsorbent to allow a concentration of water to be less than 0.5 mol ppm; and a filling step of filling a filling container with a hydrogen chloride mixture obtained in the second dehydration step so that at least a part of the hydrogen chloride mixture is liquid, and a concentration of water in a liquid phase at a time of completion of the filling is 0.01 mol ppm or more and less than 1 mol ppm.

Abstract: A stable aqueous composition of sodium chlorite and a hydrated borate donor having a pH of greater than 9.0 and the weight percent ratio of sodium chlorite (reported as NaClO2) to hydrated borate donor (reported as the sum of H2O+B2O3) is less than 1.5:1 respectfully. A method of remediating an aqueous system using the stable aqueous composition.

Abstract: A composition includes a few-layer phosphorene nanomaterial comprising at least one of mono-, bi-, and n-layer phosphorene nanosheets, where n is an integer selected from 3 to 6; deoxygenated water; and at least one amphiphilic surface active component.

Abstract: Composite material units (CMU) of the structure (SE1-ML-LinkerL-Ligand2-SE2), are provided, wherein ML is a Mechanical Ligand, LinkerL is a chemical bond or entity that covalently links ML and Ligand2, Ligand2 is a chemical entity that is covalently linked to the structural entity SE2, or forms a mechanical bond with the structural entity SE2, and SE1 and SE2 are structural entities.

Abstract: Disclosed are a graphene material production device and a system including the device. The device includes: a first reaction component, a second reaction component and a negative pressure generating component. The first reaction component includes a first reaction chamber and a first material outlet arranged at a bottom of the first reaction chamber. The second reaction component includes a second reaction chamber and a second material inlet. A connecting passage between the first material outlet and the second material inlet is provided with a valve. A suction hole of the negative pressure generating component is provided inside the second reaction chamber. The use of the device in the process of producing a graphene material by a redox method can overcome the problem that the viscous material is difficult to transfer, thereby reducing the production difficulty and effectively improving the production efficiency of graphene materials.

Abstract: In an embodiment, a process for producing a particulate silicon-carbon nanocomposite (SCN) material includes: providing primary graphite particles carrying nanoscale silicon particles on outer surfaces thereof; performing a high shear mixing procedure to produce primary graphite particles carrying a multiplicity of silicon nanostructures exhibiting plate-like morphologies; distributing a source of amorphous carbon over the primary graphite particles carrying such silicon nanostructures; and producing by way of a carbonization procedure an amorphous carbon layer at least partially surrounding the outer surface of each primary graphite particle, within which such silicon nanostructures are embedded.

Abstract: A method of a growing an embedded single crystal diamond structure, comprising: disposing a single crystal diamond on a non-diamond substrate, wherein the non-diamond substrate is larger than the single crystal diamond; masking a top portion of the single crystal diamond using a masking material; and using a chemical vapor deposition (CVD) growth chamber, growing polycrystalline diamond material surrounding the single crystal diamond in order to join the single crystal diamond to the polycrystalline diamond material.

Abstract: A process for producing nanoparticles of a substance, including in a first chamber, forming a dispersion of a substance in a fluid and bringing the fluid into a supercritical state; passing the dispersion from the first chamber through a cooling device or into a cooling zone in a second chamber, wherein the cooling device or cooling zone configured to reduce temperature of the dispersion below a temperature at which the fluid forms solid particles such that nanoparticles of the substance are formed, wherein the second chamber comprises a surface configured to receive the solid particles of the fluid and the nanoparticles of the substance; allowing pressure to decrease and/or temperature to increase in the second chamber to transform the solid particles into a gaseous state, removing the fluid in the gaseous state and with the nanoparticles remaining on the surface; and collecting the nanoparticles from the surface.

Abstract: Provided is a dispersion containing high-purity silica particles and a method for producing the same. A first solution containing a silane alkoxide and a second solution containing fine bubbles having an average bubble diameter of 40 nm to 10 ?m are mixed. Thus, the silane alkoxide is hydrolyzed without using an alkaline catalyst in a liquid phase containing the fine bubbles, so that uniform silica particles having an average particle size of 3 to 10 nm are produced. Further, hydrolysis is carried out by adding a hydrolyzable metal compound to the dispersion containing the silica particles in the presence of the fine bubbles and the alkaline catalyst. Thus, the silica particles are grown, so that a uniform silica-based particle dispersion containing particles having an average particle size of more than 10 nm and 300 nm or less is produced.