US1581396A - Box-strapping table - Google Patents

Description

April 20 1926.

H. DE HAVEN BOX STRAPPING TABLE Filed Nov. e, 1923 2 Shafts-Sheet 1' Y INVENTOR.

-4 H HUGH DE HHVEN- BY s xA huq- ATTORNEY A ril 20 ,1926. 1 v H. DE HAVEN BOX STRAPPING TABLE Filed Nov. 6, 1923 2 Sheets-Sheet 2 INVEN TOR. HUGH DE HHVEN A TTORNEY UNITED STATES PATENT OFFICE.

HUG-H DE I-I AVEN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOB COMPANY, OF SAN FRANCESCO, CALIFORNIA.

To TI-I'i MAcHiNE BOX-STRAPIING TABLE.

To (ZZZ whom it may concern:

Be it known that 1, HUGE: DE HAVEN,

a citizen of the United States of America,

, in is a specification.

his invention relates to improvements in box strapping tables, the principal object of which is to produce a table upon which a strapping machine is balanced so as rest upon the top of a box to be strapped when in one position and to be raised above the level of the box when the strapping machine is in another position. 7

Another object is to produce a deviceof this character which may be employed with any type of strapping machine without materially altering the construction of the machine.

Another object is to produce a device which is capable of being adjusted to accommodate for various sizes of boxes and methods of strapping boxes.

still further object is to construct a device of this character which is simple in construction, cheap to manufacture and well within the purchase price of the average user. 3

Other objects and advantages will be apparent during the course of the following description.

in the accompanying drawings forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same, I

Figure l is a side elevation of Figure 3,

Figure 2 is a fragmentary rear elevation of Figure 1,

Figure 3 is a top plan view of Figure 1,

Figure 4 is a diagrammatic illustration of the principle of operation, and

Figure 5 is a cross sectional view showing a modified means for shifting the balance of the supporting arm.

In the usual strapping of boxes, a strapping machine is placed upon one end of the box, a. wire placed about the box and connected to the machine in such a manner that the wire may be stretched, twisted and the ends cut off after which the machine is moved ofi of the box and another box placed in position for strapping. This necessitates the lifting and replacing of the machine upon the box with each strapping opera tion, resulting in the operator lifting many pounds each day, which is e-liminatedby'the use of my improved strapping table wherein the machine is secured to the end of a supporting arm, which supporting arm is pivotally mounted above the level of the top of the box to be operated upon.

In the accompanying drawings wherein for the purpose oi illustration is shown a preferred embodiment of my invention, the numerals 5 and 6 refer to parallel spaced angle iron members supported at a suitable point above the ground as by legs 7 and 8, which are braced as shown at 9, l1 and 12. These parallel members serve to support a plurality of rollers 13. It is of course understood that a fiat table top would serve equally as well as the rollers.

Secured at a suitable point on the table is an upright channel member 14 which has mounted within the channel a sliding plate 16 having a slot 17 therein, through which passes an adjusting bolt 18. This plate car'- ries upon its upper end a pivot pin 19 to which a plate 21 is pivotally secured. This plate is provided with upstanding bolts 22 and 28, which extend through slots 24 and 26 formed in a supporting arm 27. This supporting arm has slidably secured at one end a counterweight 28, which counterweight is adjustably locked to the bar as by a lock-bolt 29 A box-strapping machine 30 having a substantialiy rectangular base plate 31 is pivotally secured as by a pivot bolt 38 to the opposite end of this supporting arm. stop 39 is also formed upon this arm which is adapted to contact the wire-tying'machine base so as to prevent rotary movement in one direction;

By viewing Figure 3, it will be noted that the corners of the tying machine base are out upon an angle, which is common in most machines. In order to guide a box to be strappeo, to a correct position in the strapping machine, I have provided a guide member 41 having bent ends 42 and 43. This guide member is adjustably held by parallel rods 44 and 46, which extend 1 through brackets 47 and 48 which have thumb-nuts 49 therein.

The operation of my device is as follows Assuming that a box has been strapped Lil with a wire A (see Figs. 1 and 8), the machine will thenbe in the position shown in full lines in Figure 3. By now sliding the box to the dotted line position of this figure, the machine will be caused to move to the dotted line position of this figure, which will result in the supporting arm 27 moving to its dotted line position of Figure 1 as soon as the corner of the machine has moved from beneath the wire A. The reason for this supporting arm moving to the dotted line-position of Figure l'may be specifically explained by viewing Figure 4 where the point B represents the fulcrum point of the supporting arm, the arrow C the downward pressure of the counter-weight, the arrow D the downward pressure of the machine when in its full line position of Figure 3, and the arrow E the downward pressure exerted by the machine when in its dotted line position of Figure 3. This movement is also illustrated in the cross lines of Figure 4, wherein the line DF represents the supportin arm, the line GH the fulcrum, the point I the counter-weight, the line JK the position of the machine with respect to the fulcrum, when the machine is in operating position and the line LM the position of the machine when swung into inoperative position as noted by the dotted lines on this diagram. It will thus be seen that the weight of the machine moves from the point N to the point 0, thus resulting in an unbalanced condition and al lowing the counter-weight I to lift the supporting-arm and its attached machine.

In the modified form of Figure 5, the roller 51 is supported in a yoke 52 mounted upon the pivot 19 of the machine and this yoke carries a slideway 53 through which the arm 27 is adapted to slide. Pins 54-. and 56 are secured to the arm so as to prevent excessive movement thereof. With this modified construction the machine is moved directly backward in order to accomplish the over-balancing by the counter-weight and is pulled forward to cause the overbalancing by the machine so as to bring the machine into contact with the top of the box to be strapped.

It will thus be seen that I have devised a table having a supporting arm upon which a machine is attached, which supporting arm may be brought into and out of contact with the top of a box by moving the point of balance of the supporting arm toward or away from the fulcrum point.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example-of the same, and that various changes in theshape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, I claim 1. In a box strapping table, the combination with a work support, of'supporting means positioned above the work support, a plate pivoted to said supporting means, an arm adjustably secured to said plate, a coui'iter-weigh't positioned on said arm at a point outside the plane of said work support, a wire-tying machine positioned on the opposite end of said arm from said counter-weight, whereby movement of said machine out of operative position will cause a tipping of said'arm away from said work support.

2. In a box strapping table, the combination with a work support, of an arm pivot ally supported thereabove, a counter-weight secured to said arm on one side of the pivotal point of said arm, means on said arm on the opposite side of the pivotal point from said counter-weight for securing a. wire-tying machine whereby the wiretying machine is moved into and out of operative position for causing a tipping actuation of said arm, for the purpose specified.

3. In a package tying device, a support, a counter-balanced lever fulcrumed on said support and a wire-tying machine pivotally mounted on said lever, movement of tying machine about its pivotal support serving to unbalance the lever whereby the tying machine is gra-Vitally raised.

In testimony whereof I aiiix my signature.

HUGH DE HAVEN.

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