US2299176A - Roughing machine - Google Patents

Description

Oct. 20, 1942. E. QUINN Y 2,299,176

ROUGHING MACHINE Filed May 1, 1941 2 Sheets-Sheet l Oct. 20, 1942. E. QUINN nouenme MACHINE 2 Sheets-Sheet 2 Filed May 1', 1941 Patented Oct. 20, 1942 Edward Quinn,

Saugus, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application May 1, 1941, Serial No. 391,329

5 Claims.

This invention relates to roughing machines and will be described herein as embodied in a machine for roughening the over-lasted margin of the upper of a lasted shoe in order to prepare it for the reception of cement. The invention, however, is not limited in all of its aspects to embodiment in an upper roughing machine, certain features of the invention being equally adaptable to roughing machines used for other purposes such, for example, as roughening outsoles or other shoe parts.

When roughening the overlasted margin of a shoe upper it is desirable that a uniformly thin layer of material be removed from the surface of the work and experience has taught that this 1 operation is most satisfactorily performed by a rotary .tool such ,as a Wire brush. Inasmuch as thereare usually radial pleats and wrinkles in the I overlasted margin of the upper, it is necessary, in

order to insure treatment of all of the exposed surface, that the direction ofaction of the tool be transverse to said margin of the shoe upper, from the outer edge of the shoe bottom inward.

In order to avoid the formation of a substantial concavity or trough in the roughened band or stripe, when using a brush which rotates and cuts crosswise of the band, it is customary to use a brush of rather large diameter since the greater the diameter of the brush the less the amount of the convexityof its face in a segment of a given angular extent. Large brushes, however, are expensive and their accommodation in a machine sometimes imposes inconvenient limitations upon the machine design.

It is an object of the present invention to provide a compactly designed roughing machine in which is employed a rotary roughing tool of relatively small diameter which tool, nevertheless, operates in a path that approaches a straight line as closely as would the operative face of a circular tool of a diameter so great as to exceed practical limitations.

With the above stated object in View, a feature of the invention consists in a rotary roughing tool comprising two roughing elements, the

diameter of which need not be large, since the said elements are capable of relative movement in a direction transverse to the band upon the overlasted margin of a shoe upper which is roughened when the lasted shoe is placed in the field of operation of the tool.

In the illustrated machine, the tool consists of a pair of rather narrow faced, circular, wire brushes of the same diameter positioned close together, side by side, and continuously, sepa- 55 rately, driven. One of the brushes may rotate about a stationary axis but the other brush is journaled in a carrier Whichmay occupy a position in which the two brushes are coaxial or may be moved at the will of the operator to other positions where the axis of the second brush is spaced a greater or less distance from the axis of the first brush. By displacing the axis of the second brush from that of the first it is possible to obtain upon thework a result which is approximately equivalent to that secured with a single brush of large diameter.

The shifting of the position of the axis of the movable brush is preferably under instantaneous control, in order that the operator may be able to effect such shifting at the desired time while a shoe is being operated upon. For example, it is often desirable .to rough a fairly wide area around the forepart of a shoe bottom and a much narrower area in the shank .region. A tool adjusted to operate satisfactorily around the forepart may, ated upon, give trouble by catching the edge of the upper at the opposite side of the shoe, .because the two edges of the overlasted upper are often quite close together in the narrow shank portion of the shoe. With the machine of the present invention, however, this trouble is easily avoided, it being only necessary for the operator to shift the movable section of the roughing tool into coaxality with the other section when the roughing operation progresses from the forepart to the shank of the shoe, thus converting what was, in effect, a roughing tool of very large diameter into a tool of small diameter, with which the upper roughing operation can be performed easily in the shank area. In the illustrated machine, this shift may be effected instantly at the will of the operator who has merely to depress a treadle when he wishes the shift to occur.

These and other advantageous features of the invention will be better understood and appreciated from reading the following detailed description of a machine embodying the invention, in connection with the accompanying drawings, in which,

Fig. 1 is an angular view of the entire machine as seen from the right;

Fig. 2 is an angular view of a portion of the movable brush carrier and its mounting as seen from the left of the machine;

Fig. 3 is a view in side elevation of the roughing tool and its mounting; and

Fig. 4 is a vertical section taken on the line IVIV of Fig. 3.

when the shank portion is being oper- Referring to the drawings, indicates a column supporting a table [2 upon which the mechanism of the machine is mounted. At the rear of the table l2 are brackets l4 which carry bearings for a drive shaft [6. Afiixed to the shaft l6 are three pulleys l8, 20, and 22. The pulley 26 and, consequently, the shaft 16 are rotated by a belt 24 which is continuously driven by any suitable source of power.

Bolted to a standard 26 upon the table I2 is a bracket 28 i which are mounted ball bearings 36. Journaled in these bearings is the shaft 32 of a wire brush 34 and secured to the said shaft by a set screw 36 is a, pulley 38 driven by a belt 46 from the pulley 22.

J ournaled in bearings 42 opposite the bearings 36 is a wire brush 44 similar to, and having the same diameter as, that of the brush 34, the two brushes being as close to each other as it is possible for them to be without interfering with each other. 7 I

The bearings 42 aremounted in the forward end of a movable carriermember 46 in the rear portion of which is a T-slot 48. This slot fits a normally stationary T-shaped guide 50 which is secured to the upright 26 by bolts 52, 54 passing through arcuate slots 56, 58 in the upright and threaded into said guide, permitting adjustment of the guide upon the upright.

A treadle rod 60 (Fig. 2) is pivotally connected to the carrier 46 at 62 and a pull spring64, anchored to the table..l2 at 66, exerts sufficient upward pull upon the treadle rod to hold 'the carrier up against the end of an adjustable stop screw 68 which is threaded through a. stationary bracket 76 bolted to the top of the upright 26. When the treadle rod 60 is depressed the carrier 46 will move downward on the guide 50 until it is stopped by engagement of the head 12 of a bolt 14, screwed into the lower face of the carrier 46,.with the table. l2.

The wire brush 44 is mounted on a shaft 16 (Fig. 4) which is similar to the shaft 32 and to which is secured by a set screw 78 a pulley 80. The shaft 76 is journaled in the bearings 42 and the pulley 86 is driven .by a belt 82 from the pulley l8 upon the drive shaft 16.

As shown, the upper portion of the roughing tool is surrounded by a hood. 84 upon which is mounted a gauge 86 designed to control presentation of a shoe S to the action of the roughing ,tool.

Normally the stop screw 68 is so set that when the carrier 46 is in its uppermost position the axis of the shaft 16 will be in alignment with the axis of the shaft 32 and the brushes 34 and 44 will be in register with each other. Under these conditions the roughing tool will operate like a, single wire brush whose diameter is the same as that of the brushes 34, 44 and will be suitable for the roughing of a narrow band upon the bottom of a shoe held against the gauge 86, or for operation in the sharply curved portions between the shank and forepart of the shoe. When operating around the forepart of the shoe bottom where it is desired to roughen a wider band without producing any substantial transverse concavity, the operator will depress the treadle and move the brush 44 downward to the position shown in Figs. 3 and 4 with the result that the tool will present an effective roughing surface which is substantially equivalent to that presented by a circular tool of much greater diameter than that of the brushes 34, 44, the gauge 86 being so positioned that this part of the surface of the tool is used in the roughing operation.

Having described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is:

1. In a roughing machine, a rotary roughing tool comprising two separately driven roughing elements capable of relative movement in a direction transverse to a roughened band produced upon a work piece by the machine.

2. In a roughing machine, a roughing tool comprising two separately driven rotary roughing elements mounted in normally unyielding bearings one of which is movable by the operator to permit relative movement of said elements into and out of coaxality.

3. In a roughing machine, a roughing tool comprising two relatively movable rotary roughing elements positioned close together, separate means for continuously rotating each of said elements independently of the other, and operator actuated means for effecting relative movement of said elements into and out of coaxality while they are rotating.

4. In a roughing machine, a roughing tool comprising similar, separately driven, rotary, roughing elements, a stationary bearing in which one of said elements is journaled, a treadle-operated movable carrier, and a bearing in said carrier in which the other of said elements is journaled, said carrier being operable while the tool is rotating.

5. In a roughing machine, two similar, circular, wire brushes rotatably mounted side by side, separate driving means for said brushes, a shoe gage arranged to position a shoe across the fronts of the brushes approximately parallel to their axes, and means enabling the operator to move one of the brushes in a vertical direction, transverse to the shoe, to present a greater or less length of brush surface for action across the surface of the shoe.

EDWARD QUINN.

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