CN216660495U - A upset machine for baling line - Google Patents

Abstract

The embodiment of the application provides a upset machine for baling line includes: a frame assembly defining a support plane; the turnover assembly is rotatably arranged on the frame body assembly and comprises a first bearing frame and a second bearing frame which are vertically arranged; the overturning power assembly is used for driving the overturning assembly to overturn for 90 degrees so that the first bearing frame or the second bearing frame is selectively placed on the supporting plane; the discharging side conveying assembly is arranged on the first bearing frame and used for clamping the packaging tray and pressing the paper base plate; and the feeding side conveying assembly is arranged on the second bearing frame and is used for clamping the component tray for containing the to-be-packaged components. The turnover machine has the characteristics of simple and compact structure, capability of accurately positioning the package, accurate 90-degree turnover of the package and capability of fully meeting the requirements of a packaging process.

Description

A upset machine for baling line

Technical Field

The utility model belongs to the technical field of automatic production equipment, and particularly relates to a turnover machine for a packaging line.

Background

Taking the packaging of solar cells as an example, at present, enterprises producing solar cells have gradually applied automated packaging equipment to package and store finished products. In the process of packaging the solar cell, the finished product needs to be turned over, subjected to edge changing, conveyed and the like. In the prior art, a pure manual operation method or automatic turnover equipment is generally adopted, so that the pure manual operation efficiency is low. Among the automatic tipping arrangement who uses at present, the upset mode that adopts usually has: a lateral flip mode and a center flip mode. The two modes have the problems that the structure of the turnover equipment is complex, and the vertical 90-degree turnover cannot be realized, so that the requirements of the existing packaging process cannot be met. The vertical 90-degree turning of the package required by the existing packaging process can only be completed manually, and the problems of inconvenient operation, incapability of accurately positioning the package and the like exist.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present application desire to provide a flipping machine for a packaging line that is capable of 90 ° flipping of packages.

The embodiment of the application provides a upset machine for baling line, includes: a frame assembly defining a support plane; the turnover assembly is rotatably arranged on the frame body assembly and comprises a first bearing frame and a second bearing frame which are vertically arranged; the overturning power assembly is used for driving the overturning assembly to overturn for 90 degrees so that the first bearing frame or the second bearing frame is selectively placed on the supporting plane; the discharging side conveying assembly is arranged on the first bearing frame and used for clamping the packaging tray and pressing the paper base plate; and the feeding side conveying assembly is arranged on the second bearing frame and is used for clamping the component tray for containing the to-be-packaged components.

In some embodiments, the flipping machine includes a flip-proof compression assembly disposed on the flipping assembly for securing the item to be packaged during flipping of the flipping assembly.

In some embodiments, the anti-rollover compression assembly includes a mounting bracket fixed to the second carrier, an anti-rollover compression cylinder disposed on the mounting bracket for pressing a ready-to-package against the second carrier during rollover of the rollover assembly.

In some embodiments, the discharge side conveying assembly comprises a first mounting frame, and a discharge side motor, a discharge side transmission mechanism and a plurality of first rollers which are arranged on the first mounting frame, wherein the discharge side motor drives each first roller to rotate through the discharge side transmission mechanism so as to output the packages out of the packaging station.

In some embodiments, ejection of compact side conveying assembly is including compressing tightly cylinder, first clamping mechanism and being used for jack-up or the first climbing mechanism that resets the packing tray, compress tightly cylinder, first clamping mechanism and set up respectively on first climbing mechanism, compress tightly the cylinder and be used for compressing tightly the paper backing plate, first clamping mechanism is used for centre gripping packing tray, first climbing mechanism can jack-up to protrusion in each rolling surface that first roller was prescribed a limit to.

In some embodiments, the feeding-side conveying assembly comprises a second mounting frame, and a feeding-side motor, a feeding-side transmission mechanism and a plurality of second rollers which are arranged on the second mounting frame, wherein the feeding-side motor drives each second roller to rotate through the feeding-side transmission mechanism so as to convey the to-be-packaged parts to the packaging station.

In some embodiments, the feeding-side conveying assembly comprises an assembly tray for placing the to-be-packaged pieces, a second clamping mechanism and a second jacking mechanism for jacking or resetting the assembly tray, the second clamping mechanism and the assembly tray are respectively arranged on the second jacking mechanism, the second clamping mechanism is used for clamping the assembly tray, and the second jacking mechanism can be jacked to protrude out of a rolling surface defined by each second roller.

In some embodiments, the tilter includes a limit bump detection device disposed on the first carrier, the limit bump detection device configured to: when the component tray is transported in place, the component tray can trigger the limiting and collision block detection device.

In some embodiments, the upender includes first and second buffer struts disposed on the magazine assembly, the buffer struts configured to: the first bearing frame touches the first buffer strut, and the overturning assembly stops overturning; when the second bearing frame contact rack touches the second buffer support, the overturning assembly stops overturning.

In some embodiments, at least one side of the turning assembly in the axial direction is provided with the turning power assembly, the turning power assembly comprises a driven disc, a driving disc, a transmission part and a turning motor, the turning motor drives the driving disc to rotate, the driving disc and the driven disc transmit torque through the transmission part, and the driven disc is arranged on one side of the turning assembly in the axial direction and drives the turning assembly to turn.

In some embodiments, the tumble power assembly includes a counterweight disposed on the driven disk, the counterweight having an opposite gravitational moment about the driven disk axis of rotation than the second carrier.

The utility model provides a pair of upset machine for baling line, bear the rotatory 90 of upset subassembly that constitutes mutually perpendicularly through the drive first frame and the second and bear the frame for first frame or the second bears the frame mode of selectively placing on the supporting plane, solved artifical upset package inefficiency in the past, the problem of the vertical upset of automatic upset machine structure complicacy and unable realization package has simple structure compactness, can the accurate positioning package and accurately realize package 90 upsets, fully satisfy the characteristics of packaging technology requirement.

Drawings

FIG. 1 is a schematic view of a flipping machine for a packaging line according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the frame assembly of FIG. 1;

FIG. 3 is a schematic structural diagram of the turning assembly, the anti-turning hold-down assembly and the driven disc in FIG. 1;

FIG. 4 is a schematic view of the discharge side transport assembly of FIG. 1;

FIG. 5 is a schematic view of the feed side conveyor assembly of FIG. 1;

fig. 6 is a schematic structural view of the tumble power assembly of fig. 1.

Description of the reference numerals

A frame assembly 1; the overturning component 2; a discharge side conveying component 3; a feed-side conveying module 4; the anti-overturn compaction component 5; a turnover power assembly 6; a control device 7; adjusting the support 102; a first buffer strut 103; a second buffer strut 104; a bearing support 105; a rotating shaft 106; a first carrier 201; a second carrier 202; a limit bump detection device 203; a first adjustable motor mount 301; a discharge side motor 302; a first clamping mechanism 303; a first roller 304; a hold-down cylinder 305; a first jacking mechanism 306; a discharge side transmission mechanism 307; a second adjustable motor mount 401; a feed-side motor 402; a second clamping mechanism 403; a second roller 404; a component tray 405; a second jacking mechanism 406; a feed side transmission 407; an anti-overturn compaction cylinder 501; a mounting bracket 502; a turnover motor 601; a driving disk 602; a transmission member 603; a driven plate 604; a counterweight 605; a mounting support 606; a transmission shaft 607; bearing block 608

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

The embodiment of the application provides a turnover machine for a packaging line, please refer to fig. 1 to 6, and the turnover machine includes a frame body assembly 1, a turnover assembly 2, a discharging side conveying assembly 3, a feeding side conveying assembly 4 and a turnover power assembly 6. Support plane is injectd to support body subassembly 1, and upset subassembly 2 sets up on support body subassembly 1 rotatoryly. The tipping assembly 2 comprises a first carrier 201 and a second carrier 202 arranged perpendicular to each other. The discharging side conveying assembly 3 is arranged on the first bearing frame 201 and used for clamping the packaging tray and pressing the paper base plate. The feed-side conveyor assembly 4 is disposed on the second carriage 202 for holding the assembly tray 405. The turnover power assembly 6 is disposed on the magazine assembly 1 and is used for driving the turnover assembly 2 to turn over 90 ° so that the first carrier 201 or the second carrier 202 is selectively placed on the support plane.

The turnover machine for the packaging line provided by the embodiment of the application is characterized in that a first bearing frame and a second bearing frame are driven to vertically form a turnover assembly to rotate by 90 degrees, so that the first bearing frame or the second bearing frame is selectively placed on a supporting plane, the problems that the conventional manual turnover packaging machine is low in efficiency, the structure of the automatic turnover machine is complex and the packaging piece cannot be vertically turned over are solved, the turnover machine has a simple and compact structure, the packaging piece can be accurately positioned, the 90-degree turnover of the packaging piece is accurately realized, and the requirements of the packaging process are fully met.

Illustratively, referring to fig. 2, the inverting machine includes an anti-inversion compressing assembly 5, the anti-inversion compressing assembly 5 is disposed on the inverting assembly 2 for fixing the item to be packaged during the inverting process of the inverting assembly 2.

The specific structural form of the anti-overturning pressing component 5 is not limited.

Illustratively, the anti-rollover compression assembly 5 comprises a mounting bracket 502 fixed to the second carrier, an anti-rollover compression cylinder 501 provided on the mounting bracket 502, the anti-rollover compression cylinder 501 being used to press the ready-to-package against the second carrier during the rollover of the rollover assembly 2. The anti-overturn pressing component 5 can be switched between a clamping state and a releasing state of the to-be-packaged piece.

Illustratively, the anti-rollover pressure cylinder 501 may be bolted to the mounting bracket 502, and the mounting bracket 502 may be welded or bolted to the second carrier 202 of the rollover assembly. Before the overturning, the overturning-prevention pressing air cylinder is positioned above the second bearing frame. During the turning process, the piston rod of the anti-turning pressing cylinder 501 is controlled to extend downwards to enable the to-be-packaged piece to abut against the second bearing frame 202, namely, the to-be-packaged piece is clamped between the anti-turning pressing cylinder 501 and the second bearing frame 202, so that the to-be-packaged piece is clamped.

Illustratively, referring to fig. 4, the discharging-side conveying assembly 3 includes a first mounting frame, and a discharging-side motor 302, a discharging-side transmission mechanism 307 and a plurality of first rollers 304 disposed on the first mounting frame. The discharging side motor drives the first rollers to rotate through the discharging side transmission mechanism so as to output the packages to the packaging station. In this embodiment, the transport mode of a plurality of first rollers has advantages such as simple structure, operation stability, reliability height, use and maintain portably, is applicable to the transport of piece goods such as all kinds of boxes, package, tray.

The installation manner of the discharging side motor is not limited, for example, a first adjustable motor support 301 is arranged on one side of the first installation frame close to the first bearing frame, and the discharging side motor is installed on the first adjustable motor support 301. The first adjustable motor support 301 plays a role in mounting a motor on the discharging side; in addition, the first adjustable motor support can adjust the installation position in a kidney-shaped hole mode so as to adapt to the assembly position of the motor on the discharge side.

In some embodiments, the discharge-side transmission 307 may be a chain transmission, a toothed belt transmission, or a rack and pinion transmission.

Illustratively, referring to fig. 4, the discharge-side conveying assembly 3 includes a pressing cylinder 305, a first clamping mechanism 303, and a first jacking mechanism 306 for jacking up or resetting the packaging tray. The pressing cylinder 305 and the first clamping mechanism 303 are respectively arranged on the first jacking mechanism 306. The paper backing plate is placed on the packaging tray, and the clamping mechanism 303 is used for clamping the packaging tray to prevent the packaging tray from overturning. The hold-down cylinder 305 may be a rotary hold-down cylinder for effecting rotary hold-down action in a compact configuration to hold down the paper dunnage and prevent the paper dunnage from sliding off the packaging tray. When the first jacking mechanism 306 jacks up the packaging tray, the first jacking mechanism can protrude out of the rolling surface defined by the first rollers so that the paper base plate is in contact with the to-be-packaged piece. After the first jacking mechanism resets, the rolling surface parallel and level that first jacking mechanism and a plurality of first rollers were injectd do not hinder the package and export the packing station on a plurality of first rollers.

Illustratively, referring to fig. 5, the feeding-side conveying assembly 4 includes a second mounting frame, and a feeding-side motor 402, a feeding-side transmission mechanism 407, and a plurality of second rollers 404 disposed on the second mounting frame. And the feeding side motor drives the second rollers to rotate through the feeding side transmission mechanism so as to convey the to-be-packaged parts to the packaging station. In this embodiment, the conveying mode of a plurality of second rollers has advantages such as simple structure, operation stability, reliability height, use and maintain portably, is applicable to the transport of piece goods such as all kinds of boxes, package, trays.

The mounting manner of the feeding-side motor is not limited, for example, a second adjustable motor support 401 is arranged on one side of the second mounting frame close to the second bearing frame, and the feeding-side motor is mounted on the second adjustable motor support 401. The second adjustable motor support 401 plays a role in mounting a motor on the feeding side; in addition, the second adjustable motor support can adjust the installation position in a kidney-shaped hole mode so as to adapt to the assembly position of the motor on the feeding side.

In some embodiments, the feed-side transmission 407 may be a chain transmission, a toothed belt transmission, or a rack and pinion transmission.

Illustratively, referring to fig. 5, the feeding-side conveying assembly 4 includes an assembly tray 405 for placing the to-be-packaged items, a second clamping mechanism 403, and a second jacking mechanism 406 for jacking up or resetting the assembly tray, wherein the second clamping mechanism 403 and the assembly tray 405 are respectively disposed on the second jacking mechanism 406. The second clamping mechanism 403 is used for clamping the component tray to prevent the component tray from sliding along the plurality of second rollers during the overturning process. When the second jacking mechanism 406 jacks up the component tray, the second jacking mechanism can protrude out of the rolling surface defined by the plurality of second rollers. After the second jacking mechanism is reset, the second jacking mechanism is flush with the rolling surface limited by the second rollers, so that the assembly tray is not prevented from reversely flowing back to the initial station of the tilter according to the original route on the second rollers.

For example, referring to fig. 2, the flipping machine includes a limit bump detection device 203 disposed on the first carriage, when the component tray is transported in place, the limit bump detection device 203 is triggered, the limit bump detection device 203 transmits a signal to the control device, and then a series of actions of clamping the component tray by the second clamping mechanism 403, jacking the component tray by the second jacking mechanism 406, jacking the packaging tray by the first jacking mechanism 306, rotating the paper backing plate by the pressing cylinder 305, and flipping the component by 90 ° are started.

For example, referring to fig. 3, the turnover device includes a first buffer support 103 and a second buffer support 104 disposed on the frame assembly 1. The first buffer support post 103 and the second buffer support post 104 play roles of limiting and buffering the overturning of the overturning assembly 2, and when the second bearing frame 202 touches the second buffer support post 104, the overturning assembly overturns for 90 degrees to a certain position and stops overturning. When the first bearing frame 201 touches the first buffer support 103, the turnover assembly resets and stops turnover.

For example, the first buffer support 103 and the second buffer support 104 may be made of nylon or rubber material and wrapped by bolts, and are fixed on the frame body assembly 1 by the bolts.

Illustratively, referring to fig. 2 and 6, at least one side of the inversion assembly in the axial direction is provided with an inversion power assembly 6. For example, in some embodiments, only one axial side of the flipping unit is provided with the flipping power assembly 6, and in other embodiments, both axial sides of the flipping unit are provided with the flipping power assembly 6.

The specific structure of the tumble power assembly 6 is not limited.

Illustratively, the flipping power assembly includes a driven disk 604, a driving disk 602, a transmission 603, a transmission shaft 607, and a flipping motor 601. The overturning motor drives the driving disc to rotate, torque is transmitted between the driving disc and the driven disc through the transmission part, and the driven disc is arranged on one side of the overturning assembly in the axial direction and drives the overturning assembly to overturn.

For example, in the embodiment where the turning power assemblies 6 are disposed on both axial sides of the turning assembly, the same turning motor 601 may be shared by two turning power assemblies 6 to ensure the synchronism of the driving disks 602 on both sides.

For example, a transmission shaft 607 is provided between the two turning power assemblies 6, the turning motor is provided at one axial side of the turning assembly, the two driving discs are sleeved at the opposite ends of the transmission shaft, and the turning motor transmits the torque to the driving disc at the other axial side through the transmission shaft.

Illustratively, two bearing blocks 608 are provided below the flipping assembly, on which opposite ends of the drive shaft are rotatably supported.

In some embodiments, the transmission 603 between the driving disk and the driven disk may be a chain transmission, a toothed belt transmission, a rack and pinion transmission, or a worm and gear transmission.

In some embodiments, the driven disc transmits motion to the flipping module by way of pinning, bolting, bonding, welding, or keyed connection, driving the flipping module 2 to flip.

Referring to fig. 3, the tilter includes a rotating shaft 106, a bearing support 105, and an adjusting support 102. The rotating shaft 106 is connected to the frame body assembly through the bearing support 105, the driven disc is fixed on the rotating shaft 106 in a key connection mode, and the rotating shaft 106 provides a rotating fulcrum for the driven disc. The adjusting support 102 can adjust the height and levelness of the turnover machine by means of adjusting gaskets and bolts.

For example, referring to fig. 2, the tilting power assembly 6 includes a weight 605 disposed on the driven disc, and the gravity torque of the weight around the rotation axis of the driven disc is opposite to the gravity torque of the second bearing frame around the rotation axis of the driven disc. Since the moment arm formed between the ready-to-package item and the shaft 106 is relatively large, a weight 605 is added to the driven disk at a position outside the shaft 106 in order to facilitate the turning of the turning assembly 2.

A specific embodiment of the present application is described below.

The package packing process comprises the following steps: the initial state of the turnover machine is that the feeding side conveying assembly 4 is in a horizontal state, and the discharging side conveying assembly 3 is in a vertical 90-degree state. The packaging tray and the paper base plate are conveyed to the designated position on the discharging side conveying assembly 4 by the robot, the packaging tray is clamped by the first clamping mechanism 303, the paper base plate is pressed by the pressing cylinder 305 in a rotating mode, and the robot withdraws.

Referring to fig. 5, a to-be-packaged item is placed on the component tray 405, the feeding-side motor 402 drives the second rollers 404 to rotate through the feeding-side transmission mechanism 407, the component tray 405 is transported to a packaging station, and when the component tray 405 touches the limiting bump detection device 203, the limiting bump detection device 203 sends a signal to indicate that the component tray 405 is transported in place.

Referring to fig. 5, the second clamping mechanism 403 clamps the component tray 405, and the second lifting mechanism 406 lifts the component tray 405 upward.

Referring to fig. 4, the first jacking mechanism 306 jacks up the packing tray, and after the packing tray is pushed out to a proper position, the pressing cylinder 305 rotates to open, and the paper pad is released.

Referring to fig. 2, an anti-tipping hold down cylinder 501 holds down the assembly to prevent the assembly from tipping over during tipping.

Referring to fig. 6, the flipping motor 601 drives the transmission shaft 607 to rotate, the driving disk 602 mounted on the transmission shaft 607 rotates, and the driving disk drives the driven disk 604 to rotate through the transmission member 603. The driven plate transfers the torque to the overturning assembly 2, the overturning assembly overturns, when the second bearing frame 202 touches the second buffer strut 104, the overturning assembly overturns 90 degrees to the right, the feeding side conveying assembly is vertical 90 degrees, and the discharging side conveying assembly is in a horizontal state.

The anti-tip hold down cylinder 501 retracts, releasing the package. The second jacking mechanism 406 slowly retracts to the right position, the first jacking mechanism 306 slowly retracts to the right position, the first clamping mechanism 303 is opened, the discharging side motor 302 drives the first rollers 304 to rotate through the discharging side transmission mechanism 307, and the overturned packages are output out of the packaging station.

The turnover motor 601 drives the turnover assembly 2 to rotate reversely, and when the first bearing frame 201 touches the first buffer support post 103, the turnover assembly is turned over for 90 degrees and reset. At this time, the feeding side conveying assembly 4 is in a horizontal state, and the discharging side conveying assembly 3 is in a vertical 90-degree state.

The second clamping mechanism 403 is released and the feed side motor 402 drives the plurality of second rollers 404 via the feed side transmission 407 to rotate in reverse, thereby routing the component tray 405 back in preparation for the next work cycle.

The various embodiments/implementations provided herein may be combined with each other without contradiction. The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (11)

1. A tilter for packaging lines, comprising:

the rack body assembly (1), the rack body assembly (1) defines a support plane;

the turnover assembly (2) is rotatably arranged on the frame body assembly (1), and the turnover assembly (2) comprises a first bearing frame (201) and a second bearing frame (202) which are vertically arranged;

a turnover power assembly (6), wherein the turnover power assembly (6) is used for driving the turnover assembly (2) to turn over for 90 degrees, so that the first bearing frame or the second bearing frame is selectively placed on the supporting plane;

the discharging side conveying assembly (3) is arranged on the first bearing frame and used for clamping the packaging tray and pressing the paper base plate;

a feed-side conveyor assembly (4), the feed-side conveyor assembly (4) being arranged on the second carrier for gripping a module tray (405) containing packages to be packaged.

2. The upender machine according to claim 1, characterized in that it comprises an anti-tipping compacting assembly (5), said anti-tipping compacting assembly (5) being arranged on the upender assembly (2) for fixing the item to be packaged during the tipping of the upender assembly (2).

3. The upender of claim 2, characterized in that the tamperproof assembly (5) comprises a mounting bracket (502) fixed to the second carrier, a tamperproof air cylinder (501) provided on the mounting bracket (502), the tamperproof air cylinder (501) being configured to press the ready-to-package against the second carrier during upending of the upender assembly (2).

4. The upender of claim 1, wherein the discharge side conveyor assembly (3) comprises a first mounting frame, and a discharge side motor (302), a discharge side transmission mechanism (307) and a plurality of first rollers (304) arranged on the first mounting frame, wherein the discharge side motor drives each first roller to rotate through the discharge side transmission mechanism so as to output packaged pieces out of a packaging station.

5. The turnover machine according to claim 4, wherein the discharge side conveying assembly (3) comprises a pressing cylinder (305), a first clamping mechanism (303) and a first jacking mechanism (306) for jacking or resetting the packaging tray, the pressing cylinder (305) and the first clamping mechanism (303) are respectively arranged on the first jacking mechanism (306), the pressing cylinder (305) is used for pressing paper base plates, the first clamping mechanism (303) is used for clamping the packaging tray, and the first jacking mechanism can be jacked to protrude out of a rolling surface defined by each first roller.

6. The upender machine according to claim 1, characterized in that said feed-side conveyor assembly (4) comprises a second mounting frame, and a feed-side motor (402), a feed-side transmission (407) and a plurality of second rollers (404) arranged on said second mounting frame, said feed-side motor driving each of said second rollers in rotation by means of said feed-side transmission to feed the ready-packaged items into a packaging station.

7. The tilter according to claim 6, wherein the feed-side conveying assembly (4) comprises an assembly tray (405) for placing the to-be-packaged pieces, a second clamping mechanism (403), and a second jacking mechanism (406) for jacking up or resetting the assembly tray, wherein the second clamping mechanism (403) and the assembly tray (405) are respectively arranged on the second jacking mechanism (406), the second clamping mechanism (403) is used for clamping the assembly tray (405), and the second jacking mechanism can be jacked up to protrude out of a rolling surface defined by each second roller.

8. The tilter of claim 7, comprising a limit bump detection device (203) disposed on the first carrier, the limit bump detection device configured to: when the component tray (405) is transported in place, the component tray can trigger a limiting bump detection device.

9. The upender as claimed in claim 1, characterized in that it comprises a first (103) and a second (104) buffer support provided on said magazine assembly (1), the upender assembly (2) being stopped from being upended when said first carriage touches said first buffer support (103); when the second bearing frame contact rack contacts the second buffer support (104), the overturning assembly (2) stops overturning.

10. The upender of claim 1, characterized in that at least one axial side of the upender assembly is provided with the upender power assembly (6), and the upender power assembly comprises a driven disc (604), a driving disc (602), a transmission member (603) and an upender motor (601), wherein the upender motor drives the driving disc to rotate, the driving disc and the driven disc transmit torque through the transmission member, and the driven disc is arranged at one axial side of the upender assembly and drives the upender assembly to overturn.

11. The upender of claim 10 wherein the upender power assembly includes a counterweight (605) disposed on the driven disc with a gravitational moment about the driven disc axis of rotation opposite to that of the second carriage about the driven disc axis of rotation.

Images