US1988534A

US1988534A - Apparatus for feeding forward strip or like material particularly for tensioning bale and other ties

Info

Publication number: US1988534A
Application number: US707364A
Authority: US
Inventors: Abbott Geoffrey Joseph
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-01-26
Filing date: 1934-01-19
Publication date: 1935-01-22
Anticipated expiration: 1952-01-22

Description

Jan. 22, 1935.

G. J. ABBOTT APPARATUS FOR FEEDING FORWARD STRIP OR LIKE MATERIAL PARTICULARLY FOR TENSIONING BALE AND OTHER TIES 2 Sheets-Sheet 1 Filed Jan. 19, 1934 Jan. 22, 1935. G. J. ABBOTT 1,988,534

APPARATUS FOR FEEDING FORWARD STRIP OR LIKE MATERIAL PARTICULARLY FOR TENSIONING BALE AND OTHER TIES Filed Jan. 19, 1934 2 Sheets-Sheet 2 Patented Jan. 22, 1935 APPARATUS FOR FEEDING FORWARD STRIP OR LIKE MATERIAL PARTICULARLY FOR TENSIONING BALE AND OTHER TIES Geoffrey Joseph Agbbott, Clapham, London,

and

Application January 19, 1934, Serial No. 101,364

In Great Britain January 26, 1933 16 Claims.

This invention relates to means for tensioning strip material such as a binding strap, wire or the like, and is particularly applicable to apparatus for tensioning a metalstrap such as is employed for binding barrels, bales, crates and the like bodies.

The means according to the present invention for tensioning a binding strap, wire or the like about a body comprises a support, a pair of gripping members adapted to grip the strap between them, mounted in said support so as to be movable independently of one another, and so that when one of the gripping members is moved in one direction, the gripping surfaces of the two members are brought into contact and the other gripping member is moved by and with the first.

The invention further comprises means for tensioning a binding strap, wire or the like about a body comprising a support, a pair of gripping members adapted to grip the strap between them, one of said gripping members being mounted to rotate about a fixed axis on said support while the other gripping member is mounted to rotate about an axis which is itself movable on the support, the arrangement being such that when the axis of rotation of the last mentioned gripping member is moved in one direction, the gripping surfaces of the two members are brought into contact and the first mentioned gripping member is moved by and with the second.

The tensioning means may be combined with a one-way gripping device adapted to allow the strap to freely pass through it in the direction of feed for tensioning but to hold the strap against movement in the reverse direction, and with an anchorage device for holding one end of the strap while the other end is propelled or drawn toward it by the tensioning device.

There is further provided according to the present invention means for. locking the tensioning device and the one-way gripping device in the inoperative, open positions, by the movement of a single lever, to facilitate engagement and disengagement of the strap with and from the apparatus.

Theinvention is illustrated by way of example in the accompanying drawings, in which Fig. 1 is a side elevation of the complete tool with the strap to be tensioned passed through it,

Figs. 2, 3 and 4 are views in side elevation similar to Fig. 1 but with certain parts unessential to an understanding of the present invention omitted and with the moving parts comprised in the present invention shown in various positions which they occupy at different stages in the operation of tensioning the strap.

Fig. 5 is a plan view of the tool, with the means for joining the ends of the strap omitted.

Fig. 6 is a. sectional side elevation on the line 6-6 of Fig. 5 and Fig. 7 is an end elevation looking from the right of Fig. 4.

Referring to the drawings the support comprises a baseplate 1,preferably a casting, provided with upwardly extending parallel brackets arranged in

pairs

2, 2 and 3, 3 at the ends of the baseplate. The

brackets

2, 2 support the parts of the one way gripping device and the tensioning device and the

brackets

3, 3 support the parts of the anchorage device for one end of the strap.

The one way gripping device comprises the following. In bearing apertures in the

brackets

2, 2 is mounted a rotatable spindle 5. On the outer side of one of the brackets 2 is fixedly mounted a plate '7 having an outward projection 8 at its lower end which lies in substantially the same plane as the baseplate 1. The upper surface of this projection 8 is preferably serrated. The end of spindle 5 passes freely through plate 7 and on its outer end is fixedly mounted a pawl or cam 9 (Figs. 1-4) the length of which is selected so that its extremity, preferably serrated, can engage but cannot pass projection 8 on plate '7 when spindle 5 is moved in a counterclockwise direction in Fig. 1. The spindle 5 is held against longitudinal movements in its hearings on the one hand by cam 9 fast on one end and on the other hand by a collar 10 fast on the other end. The spindle 5 at a. point between the

brackets

2, 2 bears a fixedly mounted collar 11 having a tangentially arranged projection 12 (Fig. 6) and bearing a pin 13 which serves as an anchorage for one end of a spring 14 surrounding the spindle and the other'end of which abuts against the baseplate 1 as shown at 15 in Fig. 6. The spring tends to maintain the end of cam 9 in engagement with projection-8 on fixed plate 7.

The means for tensioning the strap is as follows. In an aperture in one of the brackets 2 is rotatably mounted a bush 22 and a plate16 connected rigidly with this bush lies against the outer surface of one of the brackets 2. The plate 16 has at its lower end an outward projection 17 which when plate 16 is vertical, lies substantially in the plane of the baseplate. This projection 1'7 is formed with an arcuate and serrated upper surface'and forms one of the gripping members of the tensioning device. A spindle 4 arranged parallel to spindle 5, extends freely through the ner surface of which is stepped as indicated at in Fig. 6 in such a manner that the plate 16.

21, the step engaging with an edge of plate 18 in such a manner that a slight angular movement is permitted to pawl 20 about the stud 19 on plate 18. This pawl 20 forms the other gripping member of the tensioning device. The pawl 20 is retained on the stud by a washer 28 and. screw 29. The length of the pawl 20 is such that when.

spindle 4 is rotated in aclockwise direction in Fig. 1 the lower end of the pawl movesflrst alone about the axis of spindle 4 until its end contacts with projection 17 or a strap resting thereon and thereafter the pawland projection rock together about the axis of spindle 4. The movement of plate 16 carrying projection 17 is lim-' ited in one direction by a stop pin 23 and in the other direction by aprojection 24 on the baseplate 1. A spiral spring 25 surrounds the bush 22, one of its ends engaging a pin 26 on the bush and the other the baseplate 1 as clearly. shown carrying the projection is normally held in the position shown in Fig. 1 in contact with pin 23. A handle 27 is provided fast on the shaft 4 and on this handle at a point near the spindle 4 is formed a lug 30 which engages beneath the tangential projection 12 on spindle 5 so that when handle 27 is raised into the position shown in Fig. l to rock pawl 20 and projection 17 in a counterclockwise direction, spindle 5 and pawl 9 are also rocked but in a clockwise direction and against spring 14 to disengage cam 9 from projection 18.

Fast on the spindle 4 there is provided a handle- 27, whereby the spindle 4 may be rotated in its

bearings

2, 2. On the handle 27, and near the spindle 4, is formed a lug 30, so positioned that when the handle 27 is raised from the horizontal toward the position shown inFigure 1, the lug 30 strikes the underside of the tangential projection 12 on the spindle 5. Consequently, when the handle 27 is moved a given distance counterclockwise, the upper gripping-member 20'of the tensioning device is rotated counterclockwise into the raised position shown in Figure 1, and, through the action of lug 30 on projection 12, the

spindle 5 is rotated'clockwlse against the action of spring 14, and the cam 9 is moved away from g the projection. 8.

On the underside of projection 12 is a shallow recess 31. As the handle 27 is rotated further counterclockwise, the lug 30 slides along the underside of projection-12, until, on the handle 27 reaching the position shown in Figure 6, the lug 30snaps into the recess 31', the spindle 5 and projection 12 rotating slightly counterclockwise so shaped that, if pressure is sharply applied to handle 27, .to move it clockwise, the lug 30 will push the projection 12 upward or clockwise,

against the action of'the spring 14, so that the lug 30 is released from the recess 31, and as the arm 27 is moved fm'ther clockwise, the parts assume the positions indicated in Figure 2.

. The anchorage device for anchoring one end of the strap to be tensioned is provided at the end of the tool where are situated the lugs 3.

On the outer surface of one of the lugs .3 is fixedly mounted a plate 32 having at its lower end an outward projection 33 lying in substantially the plane of the baseplate and having a serrated upper surface. Through the lugs 3 and the plate 32 extendsa rotatable spindle 8, one end of which is bent up to form a handle 34 while the other end carries a fixedly mounted pawl or cam 35 having a serrated lower end. The length of cam 35 is such that when spindle 8 is rotated in a clockwise directionin the drawings, the cam engages the projection 33 or a strip resting thereon with a clamping action, but is unable to pass the projection. The upper rear portion of the cam 35 is cut away or recessed as shown at 36 in Fig. 5'. Movement of the cam 35 in a counterclockwisedirection is limited by engagement with the end of a bar 37 extending across the baseplate 1; being fixed on a shoulder 38 thereon (Fig. 6).

The parts indicated generally by 40 in Fig. 1 represent a-device of any convenient form for severing the fed end of the strap and joining the two ends together.

Use of the tool takes place in the following manner. The strap 41 to be tensioned is looped around the bale or case, part of the surface of which is indicated by A.

Handles

34 and 27 are moved into the positions shown in Fig. 1 to disengage cam 35 from projection 33 of the anchorage device, pawl 20 from projection 17 of the tensioning device and cam 9 from the projection 8 of the one way gripping device.

One end 42 of the strap is passed between projection 33 and cam 35 and the handle 34 moved into the position shown in Figs. 2, 3 and 4 whereby cam 35is rocked to clamp end 42 fixedly in position. The other end 43 of the strap is now passed between projection 8 and cam 9 of the oneway' gripping device and the pawl 20 and projection 17 of the tensioning device and over the end of bar 37 and over cam 35 to lie in the cutaway 36. Next the handle 27 is moved into the position shown in Fig. 4 with the result that the lug 30 on the handle 27 is disengaged from the tangential projection 12 on spindle 5 and the spindle and pawl 9 permitted to rock under the urge of spring 14 in a counterclockwise direction to clamp the strap between pawl 9 and projection 8. It will readily be seen that movement of the strap end 43 to the left between pawl 9 and projection 8 will be permitted by pawl 9 rocking slightly against spring 14 but that any movement of end 43 to the right would be prevented by the jamming of pawl 9.

It now movement of the handle 27 downwards is continued, spindle 4 is rocked clockwise inits bearing in one bracket 2 and bush 22 to move pawl 20 into the position shown in Fig. 2 where it engages the surface of the strap resting on projection 17. Thereafter, further downward movement of handle 27 into the position shown in Fig. 3 causes the pawl 20 and projection 17 to move in unison about the axis of spindle 4 and the end 43 of the strap gripped between them is drawn or propelled to the left, the pawl 9 of the one way gripping device being rocked slightly as a result of the pull on the strap, to permit the movement of the strap. If now the lever 27 is raised to the position shown in Fig. 4, that is to say to an extent which is insuflicient to rock one way rocking pawl 9, the pawl 20 is returned by the rotation of spindle 4 to the position shown in that figure and the projection 17 is returned by the spring 25, the strap end 43 being in the meantime released from the

tensioning device

20, 17 but maintained under tension by the one way gripping device 9, 8. A further depression of lever 27 results in a further feed movement being imparted to strap end 43 and it will readily be seen that by repeatedly rocking lever 27 the strap will be bound tightly around the bale.

When the downward (clockwise) movement of lever 27 is terminated by the edge of plate. 16 striking a stop 24 (Figure 4) on the baseplate and the lever is raised to prepare for a new ten? sioning stroke, the stud 19 rotates, or is at least free to rotate to a very small extent relatively to the pawl 20, the toe of which may be in jammed engagement with the metal strap, and this relative movement between pawl and stud helps to free the toe of the pawl. If this relative movement is of sufilcient extent, the step 21 of the pawl comes into engagement with the underside of plate 18 (at the left hand side of the stud 19 in Figure 2) and the pawl is then positively moved counterclockwise out of engagement with the strap.

The one way gripping device 9, 8 the

tensioning device

20, 17 and the

anchorage device

35, 33 being all arranged at the side of the tool atfords the advantage that the strap may be inserted in the tool in a direction at right angles to the length.

The strap tensioning operation having been completed, device 40 is rocked by handle 34 about spindle 4 and the end 43 severed, for example between a cutting edge 50 and the edge of bar 37 and thereafter the ends 42 and 43 joined in any convenient known manner as by the operation of tongue and slot forming dies forming part of mechanism 40 and operated by handle 51.

I claim:

1. Means for moving forward a strip of material comprising a one way gripping device, and a feeding device including a rotatable spindle, a projection carried freely on said spindle so as to be capable of rocking movement of limited extent, an eccentric on said spindle and a pawl mounted on said eccentric and means for rotating said spindle in one direction to grip the strip between the pawl and projection and to move the pawl, projection and strip bodily to effect the feed and in the other direction to free the strip from the pawl and projection.

2. Means for moving forward a strip oi. material comprising a one way gripping device, and a feeding device including a rotatable spindle, a projection carried freely on said spindle so as to be capable of rocking movement of limited extent, an eccentric on said spindle, a pawl mounted for rocking movements of limited extent on the eccentric and means for rotating said spindle in one direction to grip the strip between the pawl and projection and to move the pawl, projection and strip bodily to effect the feed and in the other direction to free the strip from the pawl and projection.

3. Means for tensioning a strip of material about a body, comprising a support, a pair of gripping members adapted to grip between them the strip to be tensioned, and mounted in said support so as to be each movable independently of the other within certain limits, and so mounted that when one of said gripping members is moved in one direction, the gripping surfaces, of the two gripping members are brought into. contact and thereafter the other gripping member is moved by and with the first. 1

4. Means for tensioning a strip of material about a body as claimed in claim 3, in which one of the gripping members is rotatably mounted.

5. Means for tensioning a strip of material about a body as claimed in claim 3, in which the two gripping members are rotatably mounted.

6. Means for tensioning a strip of material about a body as claimed in claim 3, in which the two, gripping members areso mounted that when one'gripping member is being moved by and with the other gripping member, they both rotate about the same axis.

7. Means for tensioning a strip of material about a body as claimed in claim 3, in which the two gripping members are so mounted that when one gripping member is being moved by and with the other gripping member both members rotate about a common axis above the point wherethe gripping members make gripping contact.

8. Means for tensioning a strip of material about a body, comprising a support, a gripping member mounted to rotate about a fixed axis on said support, a second gripping member, mounted into contact and thereafter the first gripping I member is moved by and with the second.

9. Means for tensioning a strip of material about a body as claimed in claim 3 and including a one-way gripping device adapted to allow a strip to pass freely through it in the direction of feed by the tensioning means and to hold the strip against movement in the reverse direction.

10. Means for tensioning a strip of material about a body as claimed in claim 3 and including an anchorage device adapted to hold one end of the strip while the other end is moved toward it by the tensioning means.

11. Means for tensioning a strip of material about a body as claimed in claim 3 and including a one-way gripping device adapted to allow a strip to pass freely through it in the direction of feed by the tensioning means and to hold the strip against movement in the reverse direction, and an anchorage device adapted to hold one end of the strip while the other end is moved toward it by the tensioning means.

12. Means for tensioning a strip of material about a body comprising a support, a plate pivoted on said support, a projection on said plate, a pawl adapted to cooperate with the projection to grip and tension the strip, a rotatable member, said pawl being carried on a pivot mounted on the rotatable member, and means for rotating said member and causing the pivot of said pawl to move through an arcuate path to bring the pawl into contact with the projection on the pivoted plate and thereafter move the plate and projection by and with the pawl.

13. Means for tensioning a strip of material about a body comprising a support, a plate pivoted on said support, a projection on said plate, a pawl adapted to cooperate with the projection to grip and -move the strip, a rotatable member, said pawl being carried on a pivot mounted on the rotatable member, means for rotating said member and causing the pivot 01' said pawl to move bearings in said support carrying said shafts so that they lie parallel to one another and transversely ot the support, a pair of gripping members mounted on one of said shafts so as to be mov-. able each independently of the other within certain limits and cooperating to'torm the strip ten-' sioning device, an arm or cam mounted on another of said shafts and cooperating with a iixed part ofthe support to form a one-way gripping device for'the strip and an armvmounted-on the third shaft and cooperating with a fixed part of the support to form anchoring means for one end of the strip.

15. Means for tensioning a strip 01' material about a body comprising a pair of cooperating gripping members adapted to grip the strip and tension it and a one-way gripping device adapted to allow a strip to pass freely through it in the directionin which the strip is drawn to be tensioned and to hold the strip against movement in the reverse direction, a lever and means operable by said lever for locking the cooperating gripping members and the one-way gripping device 'in the inoperative open position so as to facilitate engagement of the strip with and its disengagement from the apparatus.

18. Means for tensioning a strip of material about a body, comprising a'support, a pair of -one of the gripping members into and out or engagement with the other gripping member and means to open the one-way gripping device upon an extended movement of the lever in the reverse direction to that for effecting the tensioning movement 01 the gripping members.

GEOFFREY-JOSEPH ABBOTT;