KR19980073323A - Slip Sheet Handling Device for Pallet Jack - Google Patents

Abstract

Slim The seat handling device is characterized by a retrofit attachment specifically to the standard lift jack unit and by having a platen pivotally connected to the tines of the jack unit which tilts the movement, and the gripper assembly is Advances in engagement with the slip sheet and when carrying luggage from one place to another As the seat is pulled onto the platen, the gripper assembly may slide along the platen to automatically cause the platen to tilt up and down automatically.

Description

Slip Sheet Handling Device for Pallet Jack

The present invention allows the pallet jack to A new and improved accessory that facilitates loading and unloading of seat supported loads.

Pallet jacks or forklift trucks in the form of narrow tines or forks have been conventionally placed on pallets transported in containers for use in lifting and transporting and handling them differently. It was an example. Recently, plastic slip sheets are used in place of pallets but require the use of specific lifting and conveying devices.

It greatly simplifies the method of attachment unit and attachment handling for standard full jack or forklift trucks. It aims to greatly increase the utilization and efficiency when lifting, transporting and unloading a load supported by a sheet. As used herein, the term lift jack is understood to be referred to and included in the form of a standard full jack or forklift truck unit with spaced tines.

The object of the present invention is a novel improvement with a gripped assembly which can retrofit the unit to an existing lift jack unit and can be closely controlled in a forward direction along a flatbed support surface for the load being carried. Slender Provided for the sheet handling unit, in which the unit is held Once caught, the slab can move on the support surface in engagement with the ground relative to the seat Increased pressure can be automatically applied to the edge of the sheet.

An additional object of the present invention is a flat support that can be automatically inclined to facilitate engagement with the load so that the load can be transported from one place to another and can also be inclined upwardly from a position that engages the ground. A slip sheet handling accessory for a surface is provided.

In a preferred gripper assembly form, the upper and lower jaws can be moved downwards under the control of a linear actuator that cooperates with a spanner to equalize the pressure across the pad when driving the lower jaws and the pad downwardly. Defined by the pressure pad, the lower jaw is fixed to the pressure pad and The downward pressure of the pressure pad takes the form of a flange with an upper shelf portion adapted to receive the edges of the seat so that the pressure between the pad and the flange The edge of the sheet is firmly wedged. The gripped pressure is also increased by installing a pressure pad for suspension from the rotatable joint so that the pad is free to undergo limited rocking or axial motion along the shelf portion. In addition, the gripper assembly is fluidly installed against a carriage that is securely secured to the platen so that the assembly can ride along the top surface of the platen and beneath the platen when the gripper assembly advances onto the raised edge of the platen. Falls automatically.

1 is a slot illustrating a load that is assembled to a standard pallet jack unit and supported by an accessory. (slip) A front side view of a preferred form of a sheet handling apparatus.

2 is a top plan view of the preferred embodiment shown in FIG.

3 is the dew Front enlarged rear view of the gripper assembly forming part of the sheet handling accessory.

4 is an enlarged side view of the gripper assembly shown in FIG.

5 is an enlarged front cross-sectional view of the gripper assembly shown in FIGS. 3 and 4;

6 is the dew under the baggage Schematic side view of a handling accessory of the present invention assembled by engaging a seat.

7 is another schematic side view of the handling accessory shown with a load placed on a pallet.

FIG. 8 is another schematic side view illustrating the end of the unloading procedure on a lit.

* Explanation of symbols for the main parts of the drawings

DESCRIPTION OF REFERENCE NUMERALS 10: attachment, 13: lever supporting member, 25: raised edge, 39: support arm, 52: connecting rod, 64,66: floating wheel, 72: offset guide wheel

With reference to the drawings in more detail a slot installed on a conventional jack unit A preferred form of a slip sheet handling attachment 10 is shown to illustrate in FIGS. The unit J simply represents various types of pallet jacks and forklift trucks used for lifting and transporting loads and in particular large and container loads. Therefore, the unit J is properly fitted with the wheelbase B, the handle H, and the front roller R having the wheel W engaging with the ground, and is closely spaced and horizontally tine. (T), a pump (P) having a foot control lever (L), and a motor drive (M) for controlling the advance of the jack unit (J). The spacing between the tines (T) is such that the pallet and luggage can be opened on one side or end of the pallet in a conventional manner which allows the pallet and luggage to lean against and easily lift and carry. In addition, the unit J is conveniently located on or near the operator control handle H of the motor drive M and is typically provided as a control panel, not shown. One commercial variant described above is described by Warn Industries, Inc. of Milwaukee, Oregon. Is manufactured and sold by.

Slot of the present invention Seat handling accessories (10) are standard pallet jacks or slots It is characterized by the ability to retrofit a spherical device in the unit J to facilitate the use of the unit J interchangeably as a jack for handling the seat. Slot marked with an S The sheets are generally located under the load K loaded in the container directly on the layer surface or on the pallet Y, as illustrated for example in FIGS. 7 and 8. Common dew The sheet S is a rectangular, high strength plastic sheet that is large in size against the load K The edge E of the seat S may protrude beyond the range of the load and be held by the attachment 10 in the manner described. Accordingly, the attachment 10 is extensively provided with a flat support surface or platen 12 that is sized on the tin T and beyond the range of the tin T, and has a low support base 13. Can be tilted downward from the platen 12 to straddle the tin T and tilted of the platen 12 relative to the transverse horizontal axis arranged through the forward end of the tin T. It is connected by axis for movement. The gripper assembly 14 is horizontal between the forward or free end of the platen 12 beyond the reverse end of the platen 12 adjacent the wheel base B and the free end of the tin T. It is provided on the carriage 15 in the forward direction. The forward direction is controlled by the chain drive 16 which includes the power delivery drive 18 in the gripper assembly 14 and crosses the actual length between the reverse direction and the forward direction end.

As best seen from FIGS. 3 and 5, a pair of leveraged support members or stringers 13 flank opposite sides of each tin T, and the stringers 13 are advanced ends of the tin T. It is pivotally connected to each tin (T) by the axis pin 20 to traverse through. Each stringer 13 branches in the forward direction or increases its depth toward the lever support point 22 and then tapers in the forward direction from 24 to terminate at the forward or raised edge 25 of the platen 12. )do. In the case of a heavy load, the pivot pin may be inserted into an opening 20 'closer to the forward end of the tin T than to the pin 20 to better distribute the load onto the platen. In this method, the forward advancement of the gripper assembly 914 along the platen and beyond the lever support point 22 causes the rising edge 25 to advance to the ground engaging position, as illustrated, for example, in FIGS. 6 and 8. The platen is automatically tilted with respect to the axis pins 20.

Another important feature of the present invention is the structure and arrangement of the gripper assembly 4 and the upper and lower jaws 26 and 28 at the forward end of the gripper assembly. The upper jaw (26) is a strip of rubber or rubber composite that crosses all widths of the platen. It is in the form of an elongated pressure pad with metal bars 27 securing the strips 27 'and hung from a pair of upper swivel joints 29 below the vertical push plate or frame 30. The lower jaw 28 is in the form of a rigid flange that coexists with the pressure pad 26 and includes an upper horizontal support 32 attached to the lower end of the flame 30. The jaws 28 are downwardly from the support 32 behind the pressure pads 26 and bent forward in the forward direction to the lower inclined ends 34, which inclined to the upper horizontal shelf or gold for the purpose described. Has a portion 35. A pair of laterally spaced brackets 36 are secured to the rear vertical surface of the lower jaw 28 and vertically closed to receive the pins 38 on the spaced support arms 39 on the carriage 15. It is provided as a slot 37.

The carriage 15 is inclined upwardly and forwardly from the pivot connection to support the arm 43 pivotally connected at the rear end of the skid 40 and to the upper end of the frame 30. It includes a horizontal base or skid 40 together with the link arm 42 of. Therefore, all assemblies 14 are free to make vertical flow movements limited by the sliding movement of the support pins 38 with respect to the slots 37. For example, the weight of the lower jaw 28 is supported by the platen 12 to normal, but the lower jaw 28 along with the rest of the carriage assembly 14 has a rising edge 25 as shown in FIGS. 6 and 8. ) Are free to slide downwards as they are advanced onto the ground engaging arrangement.

The upper jaw or pressure pad 26 can move upward and downward with respect to the inclined end 34 of the lower jaw 28 under the control of a linear actuator 44 installed behind the frame 30. Actuator 44 is a motor-driven worm drive 46 having a lower end 47 pivotally connected at 48 to a midpoint of spanner arm 50 that is horizontally across the open mid-section of frame 30. ). The connecting rods 52 are downward from the pivotal connection to each of the opposite ends of the spanner 50 via guides 53 recessedly slotted on the frame 30, the lower end of each connecting rod 52. Is connected to one of the spaced rotary fitting joints 29 for the pressure pad 26. The pressure pad 26 is suspended spaced normally above the lower jaw 28 by means of a connecting rod 52 and when the preceding actuator 44 is activated to drive the spanner 50 downwards, While downwardly engaged in engagement with the lower end 34, the mounting of the spanner allows the pressure of the pressure pad 26 against the lower jaw 28 to distribute a constant pressure along the length of the lower jaw 28. Equals

In order to advance the gripper assembly 14 and its carriage 15 along the platen 12, the chain 16 is placed in an intermediate slot 60 that traverses the actual length of the platen 12 and the chain Is fixed to the opposite ends 61 and 62. The rear end of the chain 16 is advanced and trained against the idler 64, looped through a sprocket drive 65 on a motor-driven winch. It passes through the lower flow wheel sprocket 66 and into the slot 60. One suitable form of sprocket drive is a utility wedge manufactured by Warn Industries, Inc. of Milwaukee, Oregon, which can be used as a chain drive or cable drive. The sprocket drive 65 together with the floating wheels 64 and 66 forms a power transmission drive 18 for the chain and is mounted on the pedestal 68 on the base 40. The base 40 supports the battery 69 which serves as a power source for the sprocket drive 65.

In order to center the gripper assembly 14 relative to the platen 12, the base 40 advances along the guide track 73 on the underside of the platen 12 and slots (as shown in FIGS. 2 and 3). 60 is guided along the platen 12 by the center pin 70 downward through the slot 60 to a staggered or offset guide wheel 72 bearing against the lower drive pin. In cooperation with the guide track 73, the offset guide wheel 72 serves to guide or center the carriage 15 relative to the platen 12, as well as the gripper assembly 14. Engages the seat and prevents the carriage 15 from tipping or fish tailing when the load is guided to the platen. One commercial version of the described guide means is DUALVEE, manufactured and sold by Bishop-Wisecarver Corporation, Pittsburgh, California.

The frame 30 is a rectangular, rigid metal structure, provided with upper and lower frame members 74 and 75 crossing the platen width and between the horizontally spaced pairs of vertical braces 76 and intermediate braces 76. Tightly interconnected by intermediate reinforcement plates 77.

In use, FIGS. 1 and 6 to 8 show slugs as illustrated in FIGS. 1 and 6. When pulling the load (K), which is carried in the container, which is in the seat (S), to the platen (12) The operation of the seat handler attachment 10 is illustrated. 7 and 8 illustrate carrying loads aligned with pallets Y and removing loads K from pallets 12 with pallets Y. FIG. In particular, as shown in FIG. 6, the gripper assembly 14 is powered through a remote control indicated at 80 which is tightly wired via a line 82 electrically connected to a linear actuator 46 and a sprocket drive 65. Advance by 18. As illustrated, the remote control 80 includes two sets of buttons and a pair of buttons 83 and 84 engage the lower jaw 28 and control the vertical movement of the pressure pad 26 away from the lower jaw 28. To open and close buttons. Another set of push and pullbuttons 85 and 86 controls the forward and backward movement of the carriage 15 along the platen 12. The remote control described above allows the operator to be placed on the device side to view the loading and unloading operations in detail.

The pallet jack J is manually controlled to advance the platen 12 in the face of the load K being carried. The carriage 15 is advanced in the forward direction along the platen 12 by pressing the button 85 and the carriage 15 passing over the lever support 22 causes the platen 12 to be in the position shown in FIG. It is automatically tilted downward from the rising edge 25. As the gripper assembly 14 passes over the rising edge 25, it is free to slide downward to engage the floor surface. Lower jaw (28) dew The lower jaw 28 is advanced in the forward direction by pressing the button 85 or advancing the pallet jack until it slips under the edge of the seat 25. The operator will slide between the pressure pad (26) and the jaw (28). The pressure pad 26 is driven downward by the linear actuator 46 when the close button 84 is pressed to hold the seat S firmly. Pressing the pull button 86 causes the carriage 15 to be retracted by the sprocket drive 65 as shown in FIG. The load K is pulled upward with the sheet S to the platen. When the carriage is retracted, the swivel mounts 29 cause the pressure pad 26 to rotate or pivot slightly in the direction towards the upper crest of the shelf portion 35 and the jaws 26 and 28) to separate from Strain of the sheet S is suppressed.

Again, when the center of gravity of the carriage 15, the load K and the sprocket drive 65 advance past the lever support point 22, the platen 12 is hung on the roller R. And the tin T automatically return to the horizontal conveying position as shown in FIG. As can be clearly seen from FIGS. 7 and 8, the standard pallet jack J is controlled by the lifting lever L when the tines T align with, for example, the rising edge pallet Y of the platen 12. It generally comprises a linkage arm A for the roller which causes the operator to lower the roller R as it is lifted up by the pump P under it. The carriage 15 is once again advanced in the forward direction along the platen with the frame 30 which pushes the load K in the forward direction of the platen 12 and onto the pallet Y as shown in FIG. 8. . The pressure pad 26 is released by reversing the linear actuator 46 with the open button 83 and the reverse button 86 is depressed. It is pressed to cut off the lower jaw 28 from under the seat S.

The shaft pin 20 is removed from the tine T and the opening of the tine T is inserted in the stringer 13 for reinsertion of the spindle pin in order to install the accessory 10 into the jack unit J from the foregoing. The tine T passes through the stringer 13 until it is aligned with. The process is reversed when you want to use the jack for other loading and unloading operations.

It is understood that various modifications and changes can be made in the construction and arrangement of parts as well as in adaptability to use in the form of other lifting jacks without departing from the invention.

none.

Claims (12)

Slots used in combination with lifting jacks of the form tine spaced and leveled In the sheet handling apparatus, The platen may be placed on the tines with respect to the tiltable movement of the platen with respect to the transverse horizontal axis under the platen such that the forward end of the platen can be moved between a raised position and a position that engages the lower ground. A platen having means for releasable installation; The slab mounted for the horizontal forward direction on the platen between the reverse direction and the forward end of the platen; Open position and closed closed slot to hold the edge of the seat And a gripper assembly comprising upper and lower jaws and control means for advancing the jaws between positions engaged with the seat. Sheet handling device. The slab according to claim 1, wherein the installation means includes a support plate supporting member suspended downward from the platen and the shaft pin between the support member and the other person. Sheet handling device. The slab of claim 1, wherein the forward end of the platen is on the forward end of the tine. Sheet handling device. The slab according to claim 1, wherein an inclination control means is provided in association with said installation means for controlling the inclination motion of said platen. Sheet handling device. 2. The forward position of claim 1, wherein the jaw is at a lower fixed pick-up flange and a pressure pad spaced above the flange, and a forward end of the platen and a forward end of the platen. And a drive means for advancing the gripper assembly in the liver. Sheet handling device. The slab according to claim 5, wherein the flange is bent in the downward and forward directions under the pressure pad. Sheet handling device. The platen of claim 6, wherein the flange and the pressure pad traverse a substantial width of the platen, the means slidingly supporting the flange so that the flange of the platen when advanced over the forward end of the platen. A slab characterized by a free hook on the top surface and free of charge to the ground engaging position Sheet handling device. 7. The flange of claim 6, wherein the flange includes a forwardly curved surface provided as a raised portion that can engage the input pad, and the pressure pad is limited in rotation about a horizontal axis that is parallel to the length of the pressure pad. A means for installing said pressure pad for fitting movement Sheet handling device. The gripper assembly of claim 1, wherein the gripper assembly comprises: a vertical frame in which the jaws are installed; And a pressure equivalent means for balancing the downward pressure of the jaws relative to the seat. Sheet handling device. Slots used in combination with pallet jacks of the form spaced apart and leveled by others In the sheet handling attachment device, A platen having a pair of spaced stringers on the bottom surface; A carriage installed for horizontal advancement along the upper surface of the platen between the rearward end of the platen and the rising edge; And a gripper assembly including power transfer drive means on the carriage for advancing the gripper assembly between the rear end of the platen and the rising edge, Each of the stringer pairs is on the side of the opposite side of each of the tines, the stringer having a lower edge branching forward and downward from the rear end of the platen to the lever support portion spaced below the tines; A stringer is moved forward from the lever support portion to terminate at the lifting edge of the platen and at an axis member pivotally connecting each pair of stringers to one of the tines along a transverse horizontal axis spaced above the lever support portion. And the raised edge of the platen therein can be inclined relative to the lever portion irrespective of the others between the level position and the position engaged with the lower ground, and towards the raised edge on the lever portion. Advancement of the gripper assembly causes the platen to ground relative to the axis member. Dew characterized in that such a downward slope to the engaging position Seat handling accessory. The sling according to claim 10, wherein the rearward movement of the gripper assembly from the rising edge past the lever support portion causes the rising edge of the platen to incline upward with respect to the contraction member. Seat handling accessory. 11. A slide according to claim 10, wherein the gripper assembly is slidably supported in a vertical direction on the carriage for free flow movement. Seat handling accessory.