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780028

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780028

  1. 1. * GB780028 (A) Description: GB780028 (A) ? 1957-07-31 Improved nail packing machine Description of GB780028 (A) COMPLETE SPECIFICATION Improved Nail Packing Machine We, GUNNEBO BRUKS AKTIEBOLAG, of Gunnebobruk, Sweden, a Swedish Joint Stock Company, do hereby declare the invention for which we pray that a patent may be granted to us, and the method. by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to machines for packing nails into cases. The object of the invention is to provide a machine of this class, which may be used for packing nails of various shapes and sizes, also including spikes, independently of the kind or quality of the material from which the nails, or spikes, are manufactured. According to the invention the machine comprises. a series of feeder chutes including, at least, two vibrator controlled chutes, viz. a first one for receiving the nails to be packed and acting as a hopper therefor and a last one for delivering the nails to the cases, and an intermediate chute for transferring the nails received from said hopper chute to a subsequent chute, usually the delivery chute exclusively due to its inclined position without the use of vibrating means, said intermediate chute being arranged as a scale beam so as to weigh down and decrease its degree of inclination when receiving too large an amount of nails from the hopper chute, at the same time effecting an interruption of the supply of power to the hopper chute vibrator and maintaining said interruption until the intermediate chute is sufficiently unloaded for restoring its normal position. To allow the case or cases to perform a vibratory movement during the receipt of the nails with a view to causing the nails to collect into the cases without leaving any free spaces therein, the machine may be provided with a vibrator controlled table for supporting a single case
  2. 2. or a number of cases below the outlet end of the delivery chute. The feeder chutes may be arranged in a zigzag fashion below each other, thereby allowing a very compact machine structure. In the accompanying drawings a preferred embodiment of the invention is illustrated. Fig. 1 is a side elevation of the machine and Fig. 2 is a vertical cross section taken on the line 11-Il of Fig. 1. A framework, generally designated by the reference numeral 1, supports at its top a slightly inclined chute 2 closed at its upper end and open at its lower end to act as a hopper for the nails, or spikes, to be packed. Secured to the bottom of the hopper chute 2 by means of suitable braces 3 is a vibrator 4. In order to allow the chute 2 to respond to the function d the vibrator the upper ends of the standards of the framework 1 comprise separate members coupled to said standards by means of rubber buffers 5. Provided below the hopper chute 2 is a chute 6 inclined in the opposite direction to that of the hopper chute 2. The degree of inclination of hopper 6 is such as to allow the contents thereof to slide down therein without any vibration of the chute. The receiving end of chute 6 is cup-shaped and enlarged, as shown at 7, sufficiently for receiving the outlet end of chute 2. The chute 6 is pivoted near its lower end to suitable members of the framework, as shown at 8. Near its upper end the chute 6 rests on a helical spring device 9 provided at members of the frame structure. At a point between the ends of chute 6 a pin 10 laterally projecting from the chute engages a longitudinal slot of an ear 11 forming the upper end of the control lever of an electric switch for controlling the supply of current to the vibrator 4 of the hopper chute 2. Chute 6 forms a transition plane between the hopper chute 2 and a delivery chute 12 mounted on frame elements in such a way as to be capable of performing a vibratory movement created by a vibrator 13. The delivery chute 12 which is likewise enlarged at its upper end so as to form a sort of cup for receiving nails dropping from chute 6, has its lower open end situated over a packing case or cases 14 placed on a table 15. Said table is supported by links 16 pivoted at their lower ends to base elements of the frame structure. Provided on the table 15 are clamping devices 17 for locking the case or cases in position on the table. By means of said clamping devices bordered filler hoppers 18 placed at the open tops of the cases are also held in position. The table 15 is connected by means of a rod 19 to an eccentric 20 by the operation of which the table 15 may be reciprocated in a direction
  3. 3. parallel with the longitudinal direction of the feeder chutes. The operation of the machine is substantially as follows: The quantity of nails, or spikes, that the case or cases supported by the table 15 may hold, is dumped into the hopper chute 2. In a preferred embodiment, three cases may be placed upon the vibratory table 15. The vibrators 4 and 13 are started by means of electric switches provided on a common switchboard 21. Due to the vibration of the hopper chute 2 the nails, or spikes, therein are fed towards the outlet end of the chute end and successively transferred to the receiving end 7 of the intermediate chute 6 along the bottom of which the nails, or spikes, slide due to the comparatively high degree of inclination to then drop into the cup-shaped upper end of the delivery chute 12. For the sake of a better distribution effect the intermediate chute 6 may be provided with longitudinally extending guide walls 22, Fig. 2, positioned at suitable distances from each other as well as from the side walls of the chute. Should the intermediate chute 6 receive at a time a larger amount of nails, or spikes, than can be suitably received by the delivery chute 12, then the upper portion of chute 6 sinks while compressing spring 9 and, when the chute reaches a predetermined lower position the pin 10 operates the ear 11 and the associated switch lever, causing the switch inside the casing 23 to open the circuit of the vibrator 4 for the hopper chute 2. As a result, chute 2 will stop feeding nails to chute 6, and chute 6 due to its decreased degree of inclination will only allow the nails therein to move downwards at a decreased rate. According as nails are transferred from chute 6 to chute 12, chute 6 will gradually restore its original position and, after having again pass= the abode said predetermined position, the circuit uf the vibrator 4 is again closed and chute 2 is again set in operation. From the vibrating chute 12 the nails. or spikes, are delivered to the cases 14 at a rate determined by the vibration of chute 12. The effect of the delivery chute may be varied in well-known manner bx regulating the vibration. In the cases 14 the nails, or spikes, are subjected to a final vibratory action, causing them to completely fill the cases except for unavoidable free ,paces therein. What we claim is: 1. A machine for pucking nails, or spikes, into cases, charact.rTzed bv the provision of a series of feeder chutes including, at least, two vibrator control1.d chutes, viz. a first one for receiving the nails to be packed and acting as a hopper therefor and a last one for delivering the nails to tili: cases, and an intermediate chute for trinsferring the nails received from said hopper chute to a subsequent chute. usually the delivery chute, exclusively due to its inclined
  4. 4. position without the use of vibrating means, said interinediate chute bring arranged as a scale beam so as to weigh eloxvn and decrease its degree of inclination R en receiving too large an Amount of nails irom the hopper chute, at the same time effecting an interruption of the supply of power to the hopper chute vibrator and mal ntaa ing said interruption, until the intermediate chute is suffilciently unloaded for restoring its normal position. 2. A machine as claimed in Claim 1, characterized in that the chutes of the series of feeder chutes are arranged in zigzag relation below each other in order to allow a compact structure of the machine. 3. A machine as claimed in Claim 1 or 2, eharacterized in that the intermediate chute is provided with longitudinally extending guide walls positioned at suitable distances from each other as well as from the side walls of the chute. 4. A machine as claimed in Claim 1, characterized by the provision of a vibratory table for supporting one or more cases below the outlet end of the delivery chute. 5. A machine substantially as hereinbefore described and as illustrated in the accompanying drawings.

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