Patent GB-191014715-A (GB)
Title: Improvements in and relating to Nailing and similar Fastening Machines.
Inventor: MILLER DONALD JOHN GUNN
IPC: B27F7/13
Filed: 1910-06-18
Granted: 1911-08-18
Abstract: 14,715. Miller, D. J. G. June 18. Inserting wire and like metal nails.-In a box-nailing machine, nails are fed from a n intermittently rotating hopper through adjustable apertures on to a vibrating tray 20, Fig. 2, having a grooved bottom which arranges the nails for delivery to shoots 30. The cylindrical hopper is rotated by the movement of a flexible band 7, connected at one end to the work-feeding mechanism and at the other to a spring 17. A pawl 18 prevents backward movement of the hopper. The apertures in the hopper thorugh which the nails are delivered are diamond-shaped, and have slides with similar diamond - shaped apertures which can be adjusted to vary the size of the openings. The slides may be. periodically opened to free any nails sticking in the apertures. The tray 20 is mounted on spring arms 20x, and is vibrated by a pawl 26, Fig. 3. Each shoot 30 has at its upper end a portion 31, one side of which is pivoted and adapted to be opened at intervals to free any clogged nails. A hanging barrier 42, Fig. 2, acts as a check on the downward progress of the nails. The lower end of each shoot is closed by an adjustable spring. The sides of the shoots are mounted on box-like frames 46, 47, one of the frames being movable. The movable frame is provided with a projecting part 52 adapted to engage a projection on the reciprocating work frame and thus to be moved longitudinally of the shoots, carrying one side of each shoot with it. A side of each shoot can be moved laterally to adjust the width of the shoot by a wheel 60<Î>. Barriers, one of which may be magnetic, may be fitted in each shoot to prevent extra long or thick nails from moving past the part 31. The nails are drawn from the shoots past the closing springs, and are carried to tubes 66 leading to the hammer channels, by pincer devices. The pincer devices are supported on a bar 71 extending between the lower part of a lever 21 carrying the vibrating pawl 26 and a similar support 72 on the other side of the machine. Each pincer device 70, Fig. 7, is operated by a pin 75 projecting from a rod 76 supported loosely in the ends of the arms 21, 72. The rod 76 has secured to it an arm 77, which is retained in an horizontal position by a rest. The arm 77 has at its free end a pin 78 adapted to engage a diamond-shaped projection 79 on an adjustable arm 80. As the lever 21 is rocked about its pivot 22 by a connexion 29, 23 with the reciprocating work frame 50, the pin 78 rides up and down over the projection 79, thus rocking the shaft 76 and moving the pins 75. The pincers are thus caused to grip the end nails in the shoot, pull them clear, and drop them into funnels 65 on the tubes 66, through which they travel to adjustable nail hoods 85, which deliver them into grooves in front of the drivers 68. As the box is moved up on the reciprocating work frame 50, the nails are driven. The grooved nail support in front of the drivers is arranged to tilt on a pivot as the nails are driven, thus ensuring them being driven perpendicularly to the box. The pincers may be formed so that they can grip one nail only at each operation, and, when it is desired to suspend the operation of some of the nailing- devices, plugs may be inserted in the mouths of the pincers corresponding to such devices. As other methods of preventing the nails from being fed, rows of openings in the hopper may be covered, or the upper part 31 of the corresponding shoots may be hold open by a catch. The nail hopper is mounted on pivoted arms for convenience in filling. The ends of the tubes 66 are slotted when very long nails are used. Specifications 3555/80, 20,034 / 89, 460/91, 19,771/97, 28,382/03, 21,942/04, 9694/09, and 25,608/09 are referred to.