US2637352A - Glue blockmaking machine - Google Patents

Description

May 5, 1953 R. G. REI-:D ET AL 2,637,352

GLUE BLOCKMAKING MACHINE mici. @LCL-Rig. ficimx LOC@ 617i;

A'f-ronnevs May 5, 1953 R. G. REED E1' Al. 2,637,352

GLUE BLOCKMAKING MACHINE A.

Filed April 3, 1950 3 Sheecs-Sl'xeerI 2 l5 l; NWN-roms 'Q Rosen-v6.25@ K l* Famos CLMY B Y M H @W A11-omas May 5, 1953 R. G. REED ET AL GLUE BLOCKMAKING MACHINE Filed April 5, 1950 3 Sheets-Sheet 5 Nvsmons Ro'sswr G. Resv Fn/mcxs C. CnowLEY Patented May 5, 1953 GLUE BLOCKMAKING MACHINE Robert G. Reed and Francis C. Crowley, Grand Rapids, Mich., assignors to John Widdicomb Company, Grand Rapids, Mich., a corporation of Michigan Application April 3, 1950, Serial No. 153,554

2 Claims.

This invention relates to a novel, practical and eicient high quantity production machine for making glue blocks.

Glue blocks are short blocks in which at least two sides are at right angles to each other, used in large numbers in the manufacture of articles of furniture such as tables and the like, the blocks being glued at the underside of the table top and at the inner sides of an under frame upon which the top is placed, fitting the right angle corners between the under side of the top and the inner sides of the under frame and securely glued in place for increase of strength and reinforcement of the joints between the top and frame.

These glue blocks in practice are, in the main, made from waste material. In a furniture factory this is material which may be strips cut from the sides of boards, or otherwise, which are used to make tops, frames and other parts of the furniture and which, normally, would be useless and thrown away. They are cut in short lengths to provide the glue blocks which the machine of our present invention is designed to produce very rapidly and in large quantity.

An understanding of the invention for manu- I iacturing the glue blocks noted, and of the novel practical and efficient structure embodying such invention, may be had from the following description, taken in connection with the accompanying drawings, in which,

Fig. 1 is a plan view of the glue block making machine of our invention.

Fig. 2 is a front elevation thereof.

Fig. 3 is a longitudinal vertical section, substantially on the plane of line 3-3 of Fig. 1.

Fig. 4 is an end elevation looking at the machine from the right hand end of Fig. 1 andV Fig. 5 is a fragmentary transverse vertical section substantially on the plane of line 5 5 of Fig. 1.

Like reference characters refer to like parts in the different iigures of the drawing.`

The glue block manufacturing lmachine of our invention, as a unit, is adapted to be placed upon the upper side of the table of a band saw, which is a standard machine in furniture and other Woodworking plants. The table is indicated at I and the band saw at 2 the band saw running in a vertical direction through the table.

The machine attachment of our invention includes a rectangular horizontal table or base 3, which is adapted to be detachably bolted or otherwise secured over and at the upper side of the band saw table I. At its front edge a.

guide 4 for the material which is to be converted into glue blocks is lpermanently secured, lying lengthwise and at the front edge portions of the base 3. The guide 4, as shown in cross section in Fig. 5, has lower and side guide surfaces the former of which is inclined upwardly and outwardly at a small acute angle to the horizontal, and the side of which is at a like acute angle to the vertical. Of course the guides 4 may be made with any selected or desired arrangement of the guiding lsurfaces ragainst which the material to be processed is passed.

A yielding spring 5 (Fig. 1) is mounted on the guide for holding the `material snugly against such upwardly extending surface, and beyond the band saw 2, va guide bar 6 is located at the upper side of the guide4 and permanently secured so that after the elongated strip of material I has been sawed by the band saw 2 longitudinally, as indicated at 8, the severed parts of the work strip are also guided by the outer bar 6. At the outer end of the longitudinally divided strip, the parts are sawed transversely at spaced apart places, as later described, so that each material strip 1` is longitudinally sawed, doubling the number of glue blocks produced. and the blocks 9 of substantially equal lengths are completed by severing them by sawing across transversely at the completion of the processing of the material which is fed through the machine.

At the rear part of the base 3, an electric motor ID is mounted, having a shaft II extending to both sides of the motor. At the outer end of the shaft a pulley I2 is mounted which, through a belt I3, and a similar pulley on a shaft I4 drives such shaft. The shaft I4 through any suitable speed reducing gearing housed in the housing I5 drives the shaft I6, shown in Fig. 1, at a relatively low speed.

A sprocket chain II is driven by a suitable wheel on the shaft I6 and in turn drives a short shaft I8 which is mounted to extend forward over the material guide 4. At its outer end it is equipped with two notched or serrated discs I9 located so as to be directly above the material strip 1. Thus when the serrated feed wheels I9 are brought into contact with the upper side of the wood strip I their rotation feeds the strip longitudinally to and past the band saw 2.

The shaft I8 is mounted in a journal 20 at the inner free end of a bar 2| which is mounted 23, assembled with thebar as shownin Fig. 2,

3 is under compression and normally forces bar 2| and the feed disks I9 in a downward direction, so that the disks will press, under the force of the spring, against the material strip 'l which is fed to the band saw by such wheels.

From shaft I6 a second chain 24 is driven by means of suitable wheels one on a short shaft 25 being driven from the driven shaft I6. The shaft 25 is mounted on journals secured to the base 3. At its outer end it carries a cam 26 which inshape is substantially a half circle. It is located directly underneath an arm 2l' fixed to the' journal or bearing of shaft 8. When the cam is in lower position, as in Fig. 2, the feeding disks I9 are operative to move the length of material 1 and feed it to and past the saw 2. Upon the cam being turned with the shaft to upper position as in Fig. 3 the feeding disks I9 are lifted and the length of material 1 is stopped in movement. Accordingly, there is a periodic step by step feeding of theA material i with pauses between the steps of movement.

Shaft 25 drives an endless chain 23 which in turn drives a. short shaft 29, mounted on a journal support 3!) (Fig. 4) on the base 3. A second cam 3l is fixed on the shaft 29. It raises and lowers a cut-off saw. rhe locations of the cams 26 and 3l' on the shafts 25 and 3l are 180 degrees apart, so that when the feeding disks I9 are elevated (Fig. 3)"the cut-off is lowered to operative position, and'. when the disks are lowered to their operative feeding position as in Fig. 2,\the cut-off saw islifted.

Back of the shaft 29 and its journal support 3B two bearing brackets 32, spaced from each other, are fastened to and extend upward from the base 3, through which the elongated extensiony of the motor shaft It passes and is rotatably mounted. A belt drum or pulley 33 is fastened to the shaft I l between said brackets. gated arms 34 are mounted at their rear ends for rocking4 movement on the shaft I l, extending forwardly and upwardly to the front of the glue block making. unit. At the front ends of the arms a belt drumv or pulley 35 is mounted on an arbor shaft 36v which is rotatable at its ends in the bars 34. A cut-off saw 3l is secured at one end of the arbor shaft 36. An endless belt 38 passes around the driving drum 33 and the driven drum 35 so that the saw 3'! is directly driven at high speed by the motor It.

Below the saw 3,1 and in the same vertical plane therewith is a slot 39 in the bar 6 and adjacent material guide. 4, so that when the saw is lowered into said' slot, the elongated stick of material 'l which has been longitudinally sawed by the band saw 24, is out transversely to make the complete glueblock B. The raising and lowering of the saw is controlled by the cam 31l together with a U-shaped stirrup d@ adjustably mounted on and extendingbetween and underneath the bars 34. This stirrup is in Contact with the cam 3l and is4 raised and loweredalternately with the raising and lowering ofr the H feed disks I9.

From the construction described, it is apparent that the material ifed into the machine is periis lowered and cuts off two blocks after which the cycle ofl themachine is repeated. The operation is rapid and; the-igluablocks are produced Two elon-y in large quantities in a short time. The blocks made on the machine as disclosed are not rectangular in cross-section, but have two adjacent sides at right angles to each other so as to fit in the corners when glued in place, for example at the underside of a table top and at the inner side of a framey for the top below it. The machine will handle waste material which thus is recovered by being made into the glue blocks.

One valuable feature of the present invention is that the device, as a unit, is readily installed and` secured at the upper side of a band saw, at any time when the saw is not otherwise in use. All that is necessary is to equip the tables of band saws in furniture and other woodworking factories with the necessary threaded holes to receive the securing screws by means of which the' base 3 is detachably connected with the band saw table.

The novel structure described is very practical and useful, and efiici'ent for the purposes for which it has been made. The invention is defined in the appended claims and is to be considered comprehensive of all forms of structure coming within their scope.

We claim:

1. In a structure as described, a horizontal base plate, a material guide located lengthwise of the base plate at one longitudinal edge portion thereof, an arm pivotally mounted at one end on and above the base plate, a first shaft rotatably mounted' in the other end of the arm, disk means connected to said shaft, said disk means having material engaging edges for' engaging. with material guided by said guide, an electric motor having a motor shaft, a second shaft driven from said motor at low speed', belt connections between said shaft and the disk means carrying shaft for turning the latter shaft continuously, a member connected at the free end portion of said arm, a third shaft driven by said motor driven shaft, a cam on saidthird shaft extending under said member upon which said member bears, said cam having a contour for successively raising and y lowering the first mentioned shaft and the disk feeding means thereon on rotation of the cam, a cut-off saw located above and transversely of said guide, means for mounting saidsaw for lift- Y ing and lowering, means for driving saidl sawl from the motor, and means for lifting' the-cut-off saw when the disk feeding means is lowered and lowering said saw when the said feeding means is lifted.

2. A structure as defined in claim 1, said means for drivingthe-cut-off sawfrom the motor commotor` shaft, and endless belt around said pulleys,

RoBERTG. REEn. FRANCIS C.v CROWLEY;

(References on following parte) References Cited in the le of this patent UNITED STATES PATENTS Number Name Date Snedeker Nov. 22 1887 Foshee July 12, 1904 Meeks et al. Dec. 10, 1907 Pye Jan. 12, 1909 Fitzgerald Jan. 8, 1918 Fuller Jan. 1, 1924 Number Number Name Date Hrtz June 30, 1936 Kramer Nov. 24, 1942 MCF'all Jan. 30, 1951 Williams July 15, 1952 FOREIGN PATENTS Country Date France May 18, 1942

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