GB1563372A

GB1563372A - Clipping apparatus

Info

Publication number: GB1563372A
Application number: GB1070277A
Authority: GB
Original assignee: Rheem Manufacturing Co
Current assignee: Rheem Manufacturing Co
Priority date: 1976-03-18
Filing date: 1977-03-14
Publication date: 1980-03-26
Also published as: JPS5610250B2; JPS52139766A; DK114077A; DE2710882A1; FR2344400B1; FR2344400A1; CH605256A5; IT1077489B; CA1060404A; AU508448B2; AU2322777A

Description

(54) CLIPPING APPARATUS (71) We, RHEEM MANUFACTUR- ING COMPANY, a corporation organised and existing under the laws of the State of Delaware, United States of America, of 767 Fifth Avenue, New York, New York, United States of America, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to clipping apparatus and more particularly to an improved single piston or single drive operated clip attachment device.

Use of a single drive mechanism to effect a clip attachment operation has been suggested in the prior art. For example, U.S. Patent No.

3,940,841 discloses a single piston operated clip attachment device wherein a punch is brought into cooperation with a die subsequent to formation of a clip channel by linkage arms attached to the punch drive. Such a mechanism has been found to be especially useful for attachment of clips about a rather large mass.

With the aforementioned device, however, material which is gathered must be inserted through a passage in a mounting plate prior to attachment of a clip. Thus, access to the clipper is partially limited.

According to the present invention, clipping apparatus for gathering material at a given position and securing such gathered material with a clip comprises a clip punch and means for guiding the punch towards said given position to secure a clip around material gathered thereat; gathering means having a pair of gate members each movable between a closed position for clip attachment at said given position, and an open position for release of clipped material and receipt of material to be clipped, one of the gate members including a die for cooperation with the punch in the closed position to secure a clip around material gathered at said given position; and drive means linked to the gathering means and punch to sequentially operate same in a single movement of said drive means such that the gathering step is complete before the clip is secured.A supplemental gathering linkage responsive to movement of the pivoting gates may be provided to assist gathering the material between the gates prior to attachment of a clip. Also, detent means can be employed to hold the gate member carrying the die in its closed position as the punch drives a clip thereagainst.

In preferred embodiments, each gate mem ber is pivotally mounted on a frame and the drive means comprises a unitary drive shaft carrying the punch and translatable between retracted and projected positions; and a pair of linkage arms linking the shaft to the gate members. In one such embodiment, the link- age arms are mutually parallel and attached to either side of the drive shaft, the drive means including cam means operative between each arm and a respective gate member to pivot a said gate member from its open position to its closed position as the shaft moves from its retracted position towards its projected position.

The invention will now be described by way of example and with reference to the accompanying drawings wherein: Figure 1 is a front perspective view of clipping apparatus constructed in accordance with the present invention; Figure 2 is a bottom perspective view of the apparatus shown in Figure 1; Figure 3 is a side perspective view of the apparatus shown in Figure 1; Figure 4 is a front elevation of the apparatus shown in Figure 1 partially sectioned; Figure 5 is a cross-sectional view of the apparatus shown in Figure 4 taken along the line 5--5; Figure 6 is a partial cross-section of the apparatus of Figure 4 taken along the line 66; Figure 7 is a front elevation of the ap- paratus of Figure 1 wherein the gates are partially closed; and Figure 8 is a front elevation of the apparatus of Figure 1 illustrating full closure of the gates.

Figures 1 to 3 of the drawing illustrate the general overall configuration of apparatus according to the invention. Figures 4 to 6 illustrate in greater detail the mechanical construction and Figures 7 and 8 illustrate the operative movement of the various parts of the apparatus.

Referring to the figures, a main housing or frame 10 is provided. This housing or frame 10 is maintained generally in a fixed position at a work station, for example, in a sausage making assembly line. The remaining components of the apparatus are fixed to the frame 10. Thus, a shoe 12 and cylinder assembly 14 are attached to the housing 10 by means of tie rods 16. Shoe 12 is attached to the lower side of housing 10. Assembly 14 is attached to the upper side.

Cylinder assembly 14 includes a pneumatically operated cylinder 18 having an attached cylinder cap 20. A piston 22 having an output shaft or rod 24 is retained within the pneumatic cylinder 18. Shaft or rod 24 provides the drive means for operation of the apparatus. Pneumatic controls for the cylinder assembly 14 are known to those skilled in the art. The piston 22 is shown in the retracted position in Figure 5.

The rod or shaft 24 is attached at the end opposite piston 22 to a platen 26. Platen 26 extends laterally from both sides of the shaft 24. This is illustrated in Figure 4. Drive rods 28 and 30 are fixed to each end of the platen 26. Drive rod 28 projects through bearing 32 in shoe 12. In a similar fashion, drive rod 30 projects through a bearing (not shown) in shoe 12. Thus, the drive rods 28 and 30 are slidable in the shoe 12 and move between a projected and retracted position in response to movement of platen 26 and piston 22.

First and second punches 34 and 36 are attached to a punch holder 38 which is in turn, affixed to the platen 26. Punches 34 and 36 project through guide slots 40 and 42 respectively in the shoe 12. The punches 34 and 36 have lower clip trim ends 44 and 46 respectively which have a rest or retracted position above rails 48 and 50 as shown in Figure 5. Thus, clips 52, which are arranged on rails 48 and 50, are fed through a window 54 and 56 respectively in shoe 12 so that punches 34 and 36 respectively will engage a clip 52 and drive it downwardly in slots 40 and 42 respectively.

As shown in Figure 4, one punch 34, is adjustable. That is, a set screw 35 may be loosened and a wedge block 37 adjusted by set screws 39 and 41 to fix the distance the punch 34 extends into slot 40.

Rails 48 and 50 are supported respectively on rail support members 58 and 60 attached to shoe 12. The rails 48 and 50 provide a guide for clips 52 which are fed into the apparatus.

The following description relates to the structure associated with punch 34. Similar structure is associated with punch 36.

Referring to Figure 4, a die gate 62 and a gathering gate 64 are pivotally attached to shoe 12 by means of wrist pins 67 and 69 and mounting bolts 66 and 68 respectively.

Gate 62 and gate 64 are attached to the shoe 12 on opposite sides of the path of travel for punch 34. A die block 70 is mounted in the die gate 62. Die gate 62 is comprised of a generally solid single plate number. Die gate 62 includes a projecting foot 63 which assists in the gathering of material positioned between the gates 62, 64 prior to clipping.

Gathering gate 64 is comprised of first and second parallel plate members 72 and 74 as shown in Figure 3. Plates 72 and 74 are held in spaced relation by spacing member 76 of gathering gate 64. Plates 72 and 74 are spaced to define a width sufficient for receipt of the plate defining die gate 62. Plates 72 and 74 each include a foot 65 to assist in gathering material between the gates 62, 64.

Thus, gate 62 and gate 64 may be rotated from the unengaged position shown in Figure 4 to the engaged or interlocked position illustrated by Figure 8. Interlocking of the gates 62 and 64 is effected by pivotal rotation of the gate 62 and 64 in opposite rotational senses about the mounting wrist pins 67 and 69 respectively.

Die gate 62 includes a channel edge portion 78 which includes a slot or channel 75 defining the path of travel of one leg or side of a clip 52 driven by punch 34. Spacing member of gathering gate 64 includes a similar slot or channel 77 for receipt of the leg of a clip 52. Thus, when the gates 62 and 64 are pivoted to the position illustrated in Figure 8, edges 78 and 80 define a channel 75, 77 for a clip 52 driven by punch 34. This channel terminates with die 70 which is provided to effect deformation and shaping of a clip 52 about material gathered between gates 62 and 64.

The gates 62 and 64 are driven in their path of pivotal travel in response to downward translational movement of drive rods 28 and 30. That is, each drive rod 28 and 30 includes a projecting roller cam 82 and 84 respectively. Roller cams 82 and 84 respectively ride in camways 86 and 88 respectively defined in gates 64 and 62 respectively. Note that the camways 86 and 88 include an arcuate initial portion 86A and 88A respectively connected with a straight run portion 86B and 88B respectively. Consequently, as the drive rods 28 and 30 are driven downwardly in a straight line path, the gates 64 and 62 are pivoted toward one another.

The amount of pivotal movement by the gates 64 and 62 is limited and controlled by the arcuate camways 86A and 88A. The amount of rotation effected is the amount necessary to interlock the gates 64 and 62 in the position illustrated in Figure 8, thereby defining a total channel for movement of a clip 52 into final engagement with die 70 in the path of punch 34.

The straight line segments 86B and 88B of the camways 86 and 88 are provided to permit continued translational movement of roller cams 82 and 84 subsequent to the pivotal motion by gates 64 and 62. In this manner, the platen and associated punch 34 continue the downward path of travel to effect clip 52 engagement with die 70. The roller cams 82 and 84 have the additional function of rigidly maintaining the gates 64 and 62 in a substantially interlocked, non-movable position during the final path of travel by the punch 34. The straight line segments or sections 86B and 88B of the camways 86 and 88 thus provide a lost motion function for the drive rods 28 and 30 during the actual clip attachment operation effected by punch 34.

It is noted that the camways 86 and 88 are closed camways having both sides available for cooperative action with roller cams 82 and 84. This ensures positive movement of the gates 64 and 62 when the drive rods 28 and 30 move in either translational direction, up or down.

While drive rods 28 and 30 slidably move through bearings in the shoe 12, beams 90 and 92 are fixed to shoe 12 and extend downwardly from the shoe 12 in the same direction as the path of travel effected by rods 28 and 30. The beams 90 and 92 are interconnected at their lower ends by a plate 94. Plate 94 includes keyed openings 96 and 98 which fit over beams 90 and 92 respectively. A threaded fastener 100 and 102 extends from each beam and cooperates with a threaded knob 104 and 106 to hold the plate 94 on the beams 90, 92.

Means are provided to guide and support the gate 62, 64 when in the closed position including a follower wheel 110 which engages a wedge block 108. Additional means for maintaining gate 62 as well as gate 64 in locked position when the punch 34 is in the extended or die engaging position includes a guide block as at 112 in Figure 7 which engages the shaft 30 or drive rod 30. This prevents the rod 30 from lateral bending due to the force imparted on the shaft by the punch 34 engaging the die 70. A guide or support block such as block 112 may be provided for cooperation with either drive shaft or drive rod 28 or 30.

The plate 94 also serves as the mounting bracket for a knife holder 114. That is, knife holder 114 constitutes an elongated member pivotally mounted by means of mounting bolt 116 to plate 94. Knife holder 114 includes a blade 118 at one end. The opposite end of holder 114 is pivotally connected with a rod 120 driven by a cylinder 122 which effects cutting movement of blade 118. For example, subsequent to attachment of a clip 52 to some material gathered between gates 62 and 64, cylinder 122 causes the knife holder 114 to pivot the blade 118 and cut the gathered material adjacent to attached clip 52.

In addition to gathering material by means of gates 62 and 64, a supplemental gathering bar 124 is provided. Gathering bar 124 is an elongated U-shaped bar member pivotally connected at its opposite ends to gates 62 and 64 respectively. The gathering bar 124 includes a horizontal slot 126 and 128 at each end through which a mounting bolt 130 and 132 respectively is slidably projected.

Bolts 130 and 132 are attached to gates 62 and 64 respectively. As gates 62 and 64 rotate toward one another, the bolts 130 and 132 are carried about the pivot axes defined by pivot bolts 66 and 68 to location indicated in Figure 8. Consequently, the bolts 130 and 132 carry the gathering bar 124 downwardly toward the die 70.

To accommodate the apparent movement of bolts 130 and 132 in a horizontal direction as they simultaneously move vertically downward with the rotation of gates 62 and 64, the slots 126 and 128 are provided. Consequently, the bolts 130 and 132 move from the outside edges of slots 126 and 128 as shown in Figure 4 to the inside edges of said slots 126 and 128 as shown in Figure 8 as the gates 62 and 64 move from the open to the closed position.

Thus, as the single piston 22 moves from the retracted projected position, the gates 62 and 64 simultaneously close thereby gathered ing material therebetween. Simultaneously, the gathering bar 124 moves downward and further gathers material prior to attachment of a clip 52. Gate 62, 64 pivoted movement as well as the movement of the gathering bar 124 is totally effected by drive rods 28, 30 cooperating with the arcuate cam paths 86A and 88A.

Subsequently, the continued operation of the single piston 22 towards the projected position causes the punch 34 to move a clip 52 down the channel 40 defined in the shoe 12, into channel 75, 77 defined by the gates 62 and 64 and into engagement with die 70.

The clip 52 is thus fastened about the gathered material. The knife blade 118 is then moved across the now-clipped end of the gathered material as shown in Figure 8.

The piston 22 is retraced thereby releasing the clipped end of the casing and making the device available for continued cycles.

It will be appreciated that a plurality of punches and associated pairs of gate members may be linked to the drive means in apparatus according to the invention. In the illustrated embodiment, two punches 34, 36 are simultaneously attached by the clipper device. Thus, two sets of gates as well as two gathering bars are simultaneously driven by the single piston 22. In this manner, the apparatus of the invention may be positioned adjacent the discharge nozzle of a sausage machine. As shirred material is fed from the discharge nozzle of the sausage machine and the sausage casing is thus filled, the filled casing passes between two pairs of adjacent, open gates 62 and 64 of the clipper device. Once a sufficient length of casing is filled, the clipper is actuated to gather the casing material and subsequently clip the end of the filled casing.

Simultaneously an adjacent clip is attached to the end of the casing yet to be filled. The knife blade 118 then operates to separate the filled casing from the unfilled casing. The operation can then be repeated.

Attachment of both clips and gathering of all the casing material is effected by a single piston. Sequencing of operations is provided by the mechanical interconnection between the gathering gates 62, 64 and the punches 34, 36 which drives the clips 52.

WHAT WE CLAIM IS: - 1. Clipping apparatus for gathering material at a given position and securing such gathered material with a clip, which apparatus comprises; a clip punch and means for guiding the punch towards said given position to secure a clip around material gathered thereat; gathering means having a pair of gate members each movable between a closed position for clip attachment at said given position, and an open position for release of clipped material and receipt of material to be clipped, one of the gate members including a die for cooperation with the punch in the closed position to secure a clip around material gathered at said given position; and drive means linked to the gathering means and punch to sequentially operate same in a single movement of said dnve means such that the gathering step is complete before the clip is secured.

2. Apparatus according to Claim 1 wherein each gate member is pivotally mounted on a frame and wherein the drive means comprises a unitary drive shaft carrying the punch and translatable between retracted and projected positions; and a pair of linkage arms linking the shaft to the gate members.

3. Apparatus according to Claim 2 including means for positioning a clip in the path of the punch between its retracted and projected positions.

4. Apparatus according to Claim 2 or Claim 3 wherein the linkage arms are mutually parallel and attached to either side of the drive shaft, the drive means including cam means operative between each arm and a respective gate member to pivot a said gate member from its open position to its closed position as the shaft moves from its retracted position towards its projected position.

5. Apparatus according to Claim 4 wherein said linkage arms are equidistantly spaced on opposite sides of the punch and retained thereby by a platen linked to and driven by the drive shaft.

6. Apparatus according to Claim 4 wherein the cam means comprises a separate camway in each gate cooperative with followers at tached to the respective linkage member, each camway and linkage member being coopera tive to initially pivot the gate members from the open to the closed position as the drive shaft moves towards its projected position to effect closing of the gate members prior to the drive shaft reaching its projected position, each said camway including a section which is parallel with the direction of travel of the linkage arm when the gates are in the closed position to retain the gate members in the closed position as the drive shaft proceeds to its projected position.

7. Apparatus according to any of Claims 2 to 6 including means engaging at least one of the linkage arms against lateral movement thereof when the drive shaft is in the pro jected position.

8. Apparatus according to any preceding Claim including a gathering bar pivotally attached at its opposite ends to each gate -member and tratlslatable in the direction of punch travel towards said given position upon the rotation of the gate members toward their closed position.

9. Apparatus according to Claim 8 wherein the gathering bar includes a camway at its opposite ends cooperative with a guide pin on each gate member, the guide pin being moved in the direction of punch travel upon closing of the gate members and imparting said movement in that direction to the gathering bar.

10. Apparatus according to any preceding Claim including detent means for holding the gate including the die in the closed position.

11. Apparatus according to any preceding Claim including means for adjusting the dis tance of travel of the punch.

12. Apparatus according to any preceding Claim wherein each gate member includes flanges for gathering material interposed there between prior to attachment of a clip about said material.

13. Apparatus according to any preceding Claim wherein the drive means comprise a pneumatically driven piston.

14. Apparatus according to any preceding Claim wherein the gate members include opposed slots defining at least part of a clip

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. 22. In this manner, the apparatus of the invention may be positioned adjacent the discharge nozzle of a sausage machine. As shirred material is fed from the discharge nozzle of the sausage machine and the sausage casing is thus filled, the filled casing passes between two pairs of adjacent, open gates 62 and 64 of the clipper device. Once a sufficient length of casing is filled, the clipper is actuated to gather the casing material and subsequently clip the end of the filled casing. Simultaneously an adjacent clip is attached to the end of the casing yet to be filled. The knife blade 118 then operates to separate the filled casing from the unfilled casing. The operation can then be repeated. Attachment of both clips and gathering of all the casing material is effected by a single piston. Sequencing of operations is provided by the mechanical interconnection between the gathering gates 62, 64 and the punches 34, 36 which drives the clips 52. WHAT WE CLAIM IS: -

1. Clipping apparatus for gathering material at a given position and securing such gathered material with a clip, which apparatus comprises; a clip punch and means for guiding the punch towards said given position to secure a clip around material gathered thereat; gathering means having a pair of gate members each movable between a closed position for clip attachment at said given position, and an open position for release of clipped material and receipt of material to be clipped, one of the gate members including a die for cooperation with the punch in the closed position to secure a clip around material gathered at said given position; and drive means linked to the gathering means and punch to sequentially operate same in a single movement of said dnve means such that the gathering step is complete before the clip is secured.

channel when the gate members are in their closed position.

15. Apparatus according to any preceding Claim including a plurality of punches linked to the drive means with a pair of said gate members associated with each separate punch, all driven by the same drive means.

16. Clipping apparatus substantially as dee cribed herein with reference to the accompanying drawings.