US2030604A - Safety guard for box ending machines - Google Patents

Description

Fb 111, 193$. J. 5 M

' SAFETY GUARD FOR BOX ENDING MACHINES 2 Shets-Sheet 2 Filed Sept. 20, 1934 INVENTOR.

iJNiTEfi STATEE PATENT @FFEQE SAFETY GUARD FGR BOX ENDING MACHINES Julius M. Minkow, New York, N. Y.

Application September 20, 1934, Serial No. 744,759

2 Claims.

This invention relates to improvements in safety guards for ending machines, commonly used in paper box factories, for attaching cardboard ends to box forming parts.

Ending machines are constructed so that a vertically reciprocating mechanism, carrying the incomplete box blank, is moved against an end aflixing head, which has horizontal mechanism for shifting a previously glued end in line position for attachment to the incomplete box blank, as it is shifted on a form into engagement with the prepared end. The vertically moving mechanism or box form operates so that it frequently happens that the marginal, infolded, attaching flaps of the incomplete box blank will open outwardly, and the end will not be fully attached to the box blank, when the supporting form reaches the limit of its upward travel. To avoid defective work the operator is tempted to place his fingers over the box form, and if his withdrawing movement is delayed the heavy metal box form will rise against the heavy end affixing head, and sever the fingers which project over the form.

The object of the present invention is to provide a guard, which completely excludes the fingers of the operator from entering between the vertically movable form and the end attaching head above it, which can be adjusted to fit standard machines, and varied to protect different sizes of box forms, or different adjustments of the box form, and which will move with the vertically operating form carrying mechanism.

With the above and other objects in view the invention consists in certain new and useful constructions, combinations, and arrangements of parts, clearly described in the following specification, and fully illustrated in the accompanying drawings, in which:

Fig. l is a front elevation of the safety guard, mounted in place.

Fig. 2 is a horizontal sectional view through the machine, showing the attachment in top plan, taken on line [-4 of Fig. 1.

Fig. 3 is a vertical sectional view, taken on line 2-2 of Fig. 1.

Fig. 4 is a detail sectional view of the bracket arm and its connection with the front guard bar.

Referring to the accompanying drawings, illustrating the practical construction of the invention 5 designates the form carrier, which is mounted to reciprocate vertically within the frame of the machine. On the form carrier the box form 6 is mounted. This form may be of the fixed or adjustable type, and in either case various sized boxes are made upon the form by the ending operation of the machine. The form is shifted vertically by the carrier to bring a box blank mounted on the form into line position with the end affixing head 1. The operation of the standard type of machine is such that the end holding edge flaps of box blanks, imposed on the form, frequently open up, with the result that the ends are imperfectly applied to the box blanks.

To restrain the flaps from opening up, or to restore them to approximately flap or but slightly angular position, the operator is tempted to insert his fingers over the form, while it is in upward motion, and if he is not quick enough the form is driven against the end handling head, and the fingers of the operator are out off, or completely crushed.

To avoid such accidents I provide a safety guard, which includes the rear supports or uprights 8 and 9, the lower end of which is formed with integral spaced jaws l 0 and Illa, one of which is equipped with a set screw l I, whereby the support may be clamped to a horizontal bar l2, mounted on or carried by the form carrier 5.

The upright support 8 is equipped with an integral horizontal bar I 3, and the upright support 9 is equipped with an integral bar l4, which are supporting in horizontal alignment with each other. The outer ends of the bars l3 and I4 are anchored to the form carrier.

On the bar 13 a horizontal bracket bar or arm I5 is mounted, by means of the clamp head I6, which includes the thumb nut or screw H, which is adapted to develop pressure against the upper edge of the bar l3. This bracket arm extends forwardly toward the loading side of the machine, and is formed with an upwardly offset portion l8, which carries a horizontal extension l9, terminating in an integral upright arm 20.

On the bar Ma horizontal bracket arm 2|, similar in construction to the bracket arm I5, is mounted in a similar manner, by means of an other clamping screw ll. On the forward end of the bracket arm 2| an upward arm 22 is formed. These two bracket arms are supported in similar horizontal planes for vertical movement with the form carrier, on opposite sides of the form, spaced a sufiicient distance to provide ample movement for the form.

On the uprights 20 and 22 the horizontal front guard bar 23 is adjustably mounted, and for this purpose is formed with longitudinal slots 24 and 25, which receive the screw bolts 26 and 21, carried by the short upright arms 20 and 22.

Winged nuts 28 and 29 are threaded on these screws against the horizontal bar 23. This guard bar is formed with an upwardly curved guard flange 30, which extends forwardly under the screws and thumb nuts, so as to protect the hands of the machine operator from injury.

The front guard bar is mounted so that it shifts in front of the end afiixing head of the machine, and thus provides a rising guarding element adapted to prevent the insertion of a human hand between the form carrying head and the end aflixing head. Insertion of a hand on either side of the form is prevented by the horizontal guard bracket arms, which support and move vertically in both directions with the front guard bar 23.

The relation of the side guard bars to the form, and the relation of the front guard bar to the form, may be adjusted horizontally so that the safety guard device will operate equally well with different adjustments, or different sized box forms, and will in every case positively prevent the operator from inserting his hands between the moving form and the affixing head of the machine.

The guard moves with a form and allows the operator to insert and extract a guard at any time. It allows the operator to clamp the box against the form in a higher position. In case the operator does not set the guard correctly, there will be no injuries effected.

Having described my invention I claim:

1. A safety guard for box ending machines, consisting of guard bars for guarding the sides of a moving form, a front guard bar adjustable on the side guard bars, and means for adjustably mounting the side guard bars on the form carrier of a standard box ending machine.

2. The combination with a box ending machine having a vertically movable part forming an operating element of the machine, a pair of brackets clamped in spaced relation to each other on said movable part and provided with horizontal supporting bars, horizontal guard arms adjustably clamped to the bars and extending forwardly thereof, and a front guard bar clamped to the forward ends of the arms and provided with a forwardly and upwardly curved member.

JULIUS M. MVINK'OW.

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