Mitsubishi Jukogyo Kabushiki Kaisha

Tadashi Hirakawa

Hiroaki Sasashige

Hiroyuki Takenaka

Keiichi Katayama

Yukuharu Seki

Kiyomitsu Yoshikawa

Toshiaki Kusubayashi

Makoto Ando

Tadashi Yano

Yukio Oku

Shigenari Yoshioka

Kouichi Tokiyasu

Hiroshi Sato

Toshihide Kato

Arifumi Okamoto

Noriyuki Hoshino

Masashi Waseda

Hideo Nobuhara

Isao Tokumaru

Haruo Okawa

Hiroshi Satou

A product order specification change system for a corrugation machine having a slitter-scorer device and a plurality of cutoff devices for producing corrugated board sheets having various widths and lengths, includes a cutting apparatus wherein at an order change where specifications for the sheet width are changed from one order to the next, a region is formed between the leading end of the new order sheets and the trailing end of the old order sheets, wherein a transitional slit groove is cut connecting a slit groove of the old order sheets with a slit groove of the new order sheets. As a result, the web can be stably transferred through stages of the machine, the cutting dimension accuracy can be maintained precisely, and faults such as jamming can be eliminated.

Method and system for changing product specifications in a corrugation

An anvil cylinder is severed along an axial direction of a shaft into a plurality of ring-shaped sections, and elastic bodies are fixedly secured to parts of outer circumferential surfaces of the severed anvil cylinder sections over the entire length of the cylinder. In addition, the respective anvil cylinder sections are adapted to be individually engaged with or disengaged from a knife with the aid of a rotary object. By adjusting the positions of the anvil cylinder sections, slitting slots can be formed by machining only at the portions where slitting slots are necessitated.

Rotary shear

Conveyor system for planar objects

Slitter scorer including a head exchanging device

An apparatus for preventing sheets conveyed successively on a conveyor from being stacked up at the end of the conveyor in a disordered state in alignment is improved so as to assure stable operation without deforming edge portions of the handled sheets. The improvements reside in that the apparatus comprises a pair of guide members disposed on a sheet passageway above an inlet of a sheet stack-up section respectively so as to be swingable in the direction of traveling of the sheets and adjustable in positions in the lateral directions, a drive for independently adjusting the positions of the guide members in the lateral directions, sensors for detecting opposite side edge portions of a sheet moving on a transporting conveyor, and a control responsive to results of detection by the sensors for actuating the drive to adjust the positions of the respective guide members in the lateral directions.

Apparatus for preventing disorder in sheet alignment

In a machine for working (or processing) a continuous sheet while the continuous sheet travels through the machine, an intermittent feeding apparatus for the continuous sheet is provided which has a suction roll disposed on the downstream side of the working (or processing) section for sucking and transporting the continuous sheet, adjusting means for adjusting a sheet sucking and transporting period of the suction roll, and a secution box disposed on the upstream side of the working (or processing) section for continuously exerting upon the continuous sheet a suction force that is weaker than the suction force exerted by the suction roll.

Intermittent feeding apparatus for a continuous sheet

A sheet stacker for a corrugation machine having a cutter to widthwisely cut off a continuously manufactured corrugated cardboard web into corrugated cardboard sheets, and then transfer, stack and eject the sheets. The sheet stacker comprises: a shingling conveyor arranged downstream of an outlet of the cutter for shingling the sheets; braking apparatus arranged above the shingling conveyor for braking the sheets transferred from the cutter; a first transfer conveyor arranged downstream of the shingling conveyor and which is vertically pivotable about its end portions on the upstream side thereof; a stopper disposed between the shingling conveyor and the first transfer conveyor for selectively stopping the sheets; at least one second transfer conveyor arranged in the downstream of the first transfer conveyor; a sheet stacking mechanism disposed downstream of the second transfer conveyor and which is vertically movable for receiving and stacking the sheets discharged from the second transfer conveyor; a drive mechanism for moving the sheet stacking mechanism up and down at a variable speed; and an adjustment mechanism for controlling the drive mechanism in response to the magnitude of a sheet stacking speed to thereby adjust a descent speed of the sheet stacking mechanism.

Sheet stacker

A sheet delivery device of the type in which each sheet delivered by a moving suction unit is received and delivered again by feed rolls. The sheet delivery device features a control unit which detects whether or not each sheet is delivered in synchronization with the operation timing of equipment positioned on the downstream side of delivery effected by the feed rolls and sends a signal obtained when no synchronized delivery takes place to a rotation driving unit of the feed rolls to change the revolution speed of the feed rolls thereby to realize the synchronized delivery of each sheet. Oblique delivery of the sheet is corrected by the use of divided, independently rotation controlled pairs of feed rolls.

Sheet delivery device

A lower roll apparatus for a single facer includes a nozzle-equipped scraper constituted by a scraper and a nozzle which are integrated with each other. The nozzle-equipped scraper is inerted into a circumferential groove formed on a lower roll and is disposed at the position closest to a suction bore formed in the lower roll. The apparatus is further provided with a steam or compressed air source for supplying the nozzle with steam or compressed air. The nozzle-equipped scraper is arranged such as to be pivotal so that the nozzle is separated from the circumferential groove.

Lower roll apparatus for single facer

A single facer of the type wherein a core paper sheet is corrugated by means of a pair of upper and lower corrugated rolls and has its crest portions applied with paste, and then a liner introduced from a different direction is pasted on the corrugated core sheet while passing between the lower corrugated roll and a pressure roll to form a single-faced corrugated sheet, is improved in that at least one pair of additional upper and lower corrugated rolls having a different shape of corrugation from first mentioned pair of upper and lower corrugated rolls are supported on a rotatable frame jointly with the first pair of upper and lower corrugated rolls, and structure for rotating the rotatable frame is provided.

Single facer

A single facer including a main frame installed on a base for supporting a paste application roll, a pressure roll and so on, a movable frame fixed on or removably supported on the main frame for rotatably supporting upper and lower corrugated rolls in meshing engagement with each other, and a transfer mechanism for moving the movable frame in a transverse direction substantially in the axial direction of the respective upper and lower rolls to transfer them out of or into the main frame.

There is provided a single facer consisting of an upper roll, a lower roll, a pasting device and a pressure member in parallel with the lower roll for manufacturing single-faced corrugated board. The single facer is characterized by the provision of a suction conveyor having belts for conveying single-faced corrugated board, the suction conveyor being disposed at the side of another sheet in the transport passage of the single-faced corrugated board in the proximity of the engaging point between the lower roll and pressure member, thereby preventing the strip-off or separation of a contact portion between the corrugated sheet and another sheet by means of the structure, which is extremely simple and compact in form.

Elongated hollow members or tubes frictionally engage the interior wall of a hollow corrugating roll or a hollow pressure roll of a single facer so as to minimize the elastic vibration thereof and thereby to minimize the noise developed and transmitted during the operation of the single facer. A plurality of such tubes of a given diameter are arranged circumferentially about the interior wall of the shell of a roll of a single facer in such manner that each of the tubes frictionally engages the interior wall and so that each of the tubes also engages the adjacent tubes on either side thereof, thereby providing an assembled structure in which the plurality of tubes resist the elastic deformation of the roll and the resultant elastic vibratiion and thereby reduce the noise level. In a modified form of the invention, a second plurality of tubes of smaller diameter are arranged in similar fashion along a concentric circle radially inward of the first plurality of tubes, each of the second group of tubes being positioned in contact with two adjacent ones of the first group of tubes. A single centrally disposed tube may be positioned for further assisting in holding the assembled tubes in position. In other modified forms of the invention tubes of different diameters and wall thicknesses may be randomly arranged within the roll rather than being positioned in concentric circles of tubes of progressively decreasing diameter from the interior wall to the radially inmost position. In a further modification, annular members fixed to the interior wall of the roll may be provided at the ends of the tubes for further assisting in holding the tubes in position. Sound-deadening materials in solid or liquid form may be provided in some or all of the tubes or in the spaces between adjacent tubes.

Rolls for single facer

A mill roll stand comprises a stationary frame fixed to the floor, a pair of movable frames so attached to the fixed frame as to move freely in the direction of width of the fixed frame, arms having one end thereof pivotally supported by the movable frames and the other end fitted with a member for engagement with a paper roll and a driving device attached to the movable frames respectively for swinging of the arms respectively.

Mill roll stand

A rotary plate-shape material cutting apparatus is disclosed. The apparatus comprises a pair of hollow knife cylinders, each provided with a knife on the circumferential surface and adapted to rotate in mutually opposite directions, shafts piercing the hollow portion of the knife cylinders and having both ends thereof supported by frames, bearings positioned at both ends of the knife cylinders and interposed between the shafts and knife cylinders and at least one roll provided at each of the knife cylinders, rotatably supported therein and having its rotary surface kept in contact with the external circumference of the shafts.

Growing community of inventors

Mihara, Japan

Tadashi Hirakawa