Abstract: A nailing machine includes a magazine for storing nails, an injection port, a drive mechanism, and a nail detecting lever. The nail detecting lever formed with a detecting end capable of advancing to inside of a nail containing portion is rotatably arranged between a downwardmost pusher and a pusher thereabove on one side of the magazine. An idle striking preventing arm has an upper end arranged at a vicinity of a starter, and a lower end arranged to be opposed to an end portion on a side opposed to a detecting end of the detecting lever and which is operated to start a nailing machine in cooperation with the starter. Further, the other side of the magazine is formed with a detecting end containing portion for containing the detecting end of the nail detecting lever.

Abstract: A nailing machine for striking a nail supplied into an injection port formed at a nose portion by a driver to strike out from inside of the injection port is provided with a nail guide member on a front side of the injection port. The nail guide member is provided with a guiding guide groove for guiding a front end portion of the nail struck out from inside of the injection port at an inner side face thereof, provided with a projected portion an outer diameter shape of which is formed in a half cut converging taper shape, and provided with a bulged portion brought into contact with a surface of a construction metal piece on an upper side of the projected portion. The nailing machine is positioned by inserting the projected portion into a nail hole formed at a construction metal piece. The bulged portion constitutes a fulcrum of rotation by which the nailing machine is inclined when the nailing machine is inclined to a front side.

Abstract: A method for producing an alkyl (3R,5S)-7-[2-cyclopropyl-4-(4-fluorophenyl)quinolin-3-yl]-3,5-dihydroxy-6-heptenoate of the formula (1) (wherein R is a C1-4 alkyl group), which is an intermediate for a cholesterol-reducing agent (a HMG-CoA reductase inhibitor), etc. A solution containing a compound of the formula (1) is subjected to liquid chromatography treatment using silica gel as the packing material, to separate its epimers contained therein.

Abstract: A nail detecting lever 36 formed with a detecting end 35 capable of advancing to inside of a nail containing portion 26 of a magazine 18 is rotatably arranged between a downwardmost pusher 27a and a pusher 27 thereabove on one side of the magazine 18 interposing the nail containing portion 26. There is provided an idle striking preventing arm 33 an upper end of which is arranged at a vicinity of starting means 22, a lower end of which is arranged to be opposed to an end portion on a side opposed to a detecting end 35 of the detecting lever 36 and which is operated to start a nailing machine 10 in cooperation with the starting means 22. Further, other side of the magazine 18 interposing the nail containing portion 26 is formed with a detecting end containing portion (39) for containing the detecting end 35 of the nail detecting lever 36.

Abstract: A combustion gas type nailing machine includes a lock-out bar 31 of which one end is coupled to a movable sleeve 12; a cam member 32 which is provided opposed to the other end of the lock-out bar 31 and cooperates with a trigger unit 27 rotatably; a cam surface 34 which is formed on the cam member 32, and comes into contact with the lower end of the lock-out bar 31 thereby to retain the movable sleeve 12 in a state where a combustion chamber 6 is closed; and a step portion 44 which is formed on the cam surface 34 and can engage with the lock-out bar 31. When the cam surface 34 retains the movable sleeve 12, the step portion 44 engages with the lock-out bar 31 to interrupt the rotational movement of the cam member 32, whereby it is prevented that the trigger unit 27 is operated to a position where the trigger 27 mechanism ignites the inflammable gas.

Abstract: A rotary joint is provided with: an end cap body having an opening formed therein; a hollow plug housing having an opening formed along the direction of the first-named opening and directed in a first axis direction; an intermediate sleeve held turnably in the plug housing on the first axis on its one end side and having an opening formed on its other end side and extending in a second axis direction inclined at a predetermined angle with respect to the first axis; and a plug portion held turnably in the intermediate sleeve on a second axis on its one end side and having a nipple portion formed on its other end side and inclined at a predetermined angle with respect to the second axis. The rotary joint is characterized in that its plug housing is housed/mounted in the opening of the end cap body.

Abstract: A method for producing an alkyl (3R,5S)-7-[2-cyclopropyl-4-(4-fluorophenyl)quinolin-3-yl]-3,5-dihydroxy-6-heptenoate of the formula (1) (wherein R is a C1-4 alkyl group), which is an intermediate for a cholesterol-reducing agent (a HMG-CoA reductase inhibitor), etc. A solution containing a compound of the formula (1) is subjected to liquid chromatography treatment using silica gel as the packing material, to separate its epimers contained therein.

Abstract: A ratchet member 23, which is provide with a slope 24 for guiding a tip end of a nail inclined to a rear side of an ejection opening 7 into the ejection openings 7 and 16, and a guide surface 25 for guiding the tip end of a nail to the center of each of the ejection openings 7 and 16, is provided on a rear side of ejection openings 7 and 16 and urged so that a guide surface 25 of the ratchet member 23 enters the ejection openings 7 and 16.

Abstract: A staple gun comprising a main body and a staple injection nozzle for injecting a staple into a target object, the staple injection nozzle including a nozzle body mounted on a staple striking body and a cover plate for removably closing an upper portion of a staple injection path of the nozzle body so as to guide the staple. The nozzle body has protrusions to receive an end portion of the cover plate and press this cover plate from upward, and an urging member is provided to urge the cover plate in a direction that the end portion of the cover plate intrudes into the protrusions.

Abstract: A magazine includes a nail guide surface and a movable guide wall. The nail guide surface is linear and continuous to a nail introducing opening and has a shoulder for supporting the nail heads of a connected nail assembly. The movable guide wall is confronted with the nail guide surface. In the magazine, a plurality of connected nail assemblies are loaded and placed in side-by-side relation, while being in contact with each other, between the nail guide surface and the movable guide wall. The plurality of connected nail assemblies are pressed against the guide surface of the magazine by pressing members provided on the movable guide wall. The movable guide wall is turned, for opening and closing, between a position being confronted with the nail guide surface of the magazine and a position at which the nail guide surface is opened.

Abstract: In the side portion of a nose portion disposed in the leading end portion of a nailing machine main body, a guide port is formed for guiding a nail supplied from a magazine. The opening end of a nail passage formed in the magazine is butted against the opening end of the guide port, and the nails in the nail passage can be sequentially pushed out by a pusher from the guide port to the nose portion. The inner wall of the guide port adjacent to the magazine is extended and inserted into the nail passage of the magazine, and the end portion of the extended inner wall is connected and continuous with the wall surface of the nail passage.

Abstract: A magazine includes a nail guide surface and a movable guide wall. The nail guide surface is linear and continuous to a nail introducing opening and has a shoulder for supporting the nail heads of a connected nail assembly. The movable guide wall is confronted with the nail guide surface. In the magazine, a plurality of connected nail assemblies are loaded and placed in side-by-side relation, while being in contact with each other, between the nail guide surface and the movable guide wall. The plurality of connected nail assemblies are pressed against the guide surface of the magazine by means of a pressing members provided on the movable guide wall. The movable guide wall is turned, for opening and closing, between a position being confronted with the nail guide surface of the magazine and a position at which the nail guide surface is opened.

Abstract: A staple gun comprising a main body and a staple injection nozzle for injecting a staple into a target object, the staple injection nozzle including a nozzle body mounted on a staple striking body and a cover plate for removably closing an upper portion of a staple injection path of the nozzle body so as to guide the staple.

Abstract: In the side portion of a nose portion disposed in the leading end portion of a nailing machine main body, a guide port is formed for guiding a nail supplied from a magazine. The opening end of a nail passage formed in the magazine is butted against the opening end of the guide port, and the nails in the nail passage can be sequentially pushed out by a pusher from the guide port to the nose portion. The inner wall of the guide port adjacent to the magazine is extended and inserted into the nail passage of the magazine, and the end portion of the extended inner wall is connected and continuous with the wall surface of the nail passage.

Abstract: Gas oils comprises one or more gas oil bases obtained by subjecting specific fractions from distilled petroleum fractions to hydrogenating treatment under specific conditions and optionally a small amount of a straight kerosene or gas oil. The gas oils have a sulfur concentration of 350 ppm or below.

Abstract: A manufacturing process of a diesel gas oil with a high cetane number and a low sulfur, where the cetane number thereof is at least 45, the sulfur content thereof is less than 350 ppm, and the storage stability is superior, from a petroleum distillate oil with a low cetane number and a high sulfur content is provided.

Abstract: A hydrocracking catalyst for hydrocarbon oil, comprising a complex oxide with at least 2 different elements selected from Group 3b, Group 4a, Group 4b and Group 5b of the Periodic Table, zeolite having a solid Al-NMR spectrum wherein the ratio A/B of the peak area A in a chemical shift of -30 to 18 ppm to the peak area B in a chemical shift of 20-100 ppm is 0.01-0.39 and whose surface area of pores of diameter 10 angstrom or smaller constitutes 10-85% of the total surface area, and at least one metal selected from Group 6a and Group 8 of the Periodic Table. Also, a hydrocracking method characterized by hydrocracking of petroleum distillates with a boiling point of 250-600.degree. C. using the hydrocracking catalyst in the presence of hydrogen, under conditions with a reaction temperature of 100-800.degree. C., a reaction pressure of 3-30 MPa, an LHSV of 0.01-10 h.sup.-1 and a hydrogen/oil ratio of 100-2500 Nm.sup.3 /m.sup.3.

Abstract: An object is to increase cracking rate of heavy fraction oils while producing a lessened amount of dry gases generated by the hydrogen transfer reaction and by the overcracking to obtain light fraction olefins in a high yield. A process for the fluid catalytic cracking of heavy fraction oils, which comprises steps of feeding the heavy fraction oils to a raw oil introducing portion provided at a reaction zone inlet; feeding a part of a regenerated catalyst taken out of a catalyst-regenerating zone to a catalyst introducing portion provided at a reaction zone inlet; and feeding another part of the regenerated catalyst taken out of the catalyst-regenerating zone to at least one catalyst introducing portion which is provided between the catalyst introducing portion provided at the reaction zone inlet and reaction zone outlet, the catalytic cracking in the reaction zone being carried out under conditions of a contact time of 0.1 to 3.0 sec. a reaction zone outlet temperature of 530 to 700.degree. C.

Abstract: An exhaust mechanism of a pneumatic nailing in which a striking cylinder is accommodated in a body and a striking piston in the striking cylinder is driven to drive a nail when compressed air is supplied to and exhausted from an upper portion of the striking cylinder, comprises: an inner cap arranged in the upper portion of the striking cylinder; a cylinder cap covering the inner cap; an exhaust chamber formed along inside the body between the inner cap and the cylinder cap; and a throttle hole formed in a lower portion of the exhaust chamber, wherein the exhaust air exhausted from the upper portion of the striking cylinder is discharged from the throttle hole via the exhaust chamber.

Abstract: A box nailing machine includes a piston within a cylinder to drive a nail. A main selector valve introduces compressed air into the cylinder and discharges the compressed air from the cylinder. A start operation valve operates the main selector valve. A trigger device for the box nailing machine comprises: a trigger switch operated by a trigger lever; a contact switch operated by the contact arm; an electromagnetic valve serving as the start operation valve; a logical circuit for applying a drive current to the electromagnetic valve when both the trigger switch and the contact switch are turned on; and a controller which includes a timer with a predetermined time limit. The timer is started in accordance with a trigger signal of the trigger switch and prohibits the drive current from the electromagnetic valve when the timer counts the predetermined time period. The timer is reset upon release of the trigger.