US1870067A - Industrial truck - Google Patents

Description

Aug 2, 1932.

E. H. REMDE INDUSTRIAL TRUCK Filed Nov. 26, 1928 5 Sheets-Sheet l INVENTOR ATTORNEY Aug. 2, 1932. E. H. REMDE INDUSTRIAL TRUCK Filed Nov. 1928 5 Sheets-Sheet 2 ATTDRNEY Aug. 2, 1932. E. H. REMDE 1,870,057

INDUSTRIAL TRUCK Filed Nov. 26, 1928 5 Sheets-Sheet 5 INVENTOR ATTORNEY Aug. 2, 1932. E. H. REMDE INDUSTRIAL TRUCK 5 Sheets-Shet 5 Filed N2v 26 1928 .v {AA/Mia ATTORNEY Fatented Aug. 2, 1932 UNITED STATES PATENT OFFICE EDWARD H. REMDE, F CLEVELAND, OHIO, ASSIGNOR TO THE BAKEB-RAULANG OOH- PANY, OF CLEVELAND, OHIO, .A CORPORATION OF OHIO INDUSTRIAL meta Application filed November 26, 1928. Serial No. 321,963.

' by loads may be elevated to relatively high positions or removed and lowered therefrom in a rapid and ready manner.

Another object of the invention is to provide a truck having an improved elevating mechanism capable of lifting loads to relatively high positions or removed and lowered therefrom without increasing the normal or standard height of the truck.

A further object of the invention is to 23 construct a truck of this character having an improved elevating mechanism comprising a plurality of relatively movable members. the inner one being mounted on the O truck frame and the outer one serving to a) carry the load, and the hoisting means for such mechanism being operatively connected to said members to effect their movement one relative to the other, whereby the outer or load carrying member is caused to traverse a the maximum distance, that is, from the lowest loading or unloading position to the highest loading or unloading position for which the mechanism is constructed, the result being that loads may be lifted to or lowered from great heights in a ready manner and by means of a relatively simple mechanism without increasing the normal height of the truck.

Other objects of the invention will be apparent to those skilled in the art to which my invention relates from the following description taken in connection with the accompanying drawings, wherein Fig. 1 is a side view of an industrial truck embodying my invention.

Fig. 2 is a fragmentary side view of parts shown in Fig. 1, but somewhat enlarged.

Fig. 3 is a section on the line 33 of Fig. 2.

Fig. 4 is a section on the line 4.4 of Fig. 3.

constructed to provide a main section 1a and v a relatively low section 15. In this arrangement, the wheels 2 serve as traction wheels driven by an electric motor (not shown), which is supplied with electric current from suitable batteries 4, and the wheels 3, which are relatively small, may serve as load supporting wheels. The wheels 3 are supported on the outer ends of an axle 5, the latter being supported intermediate its ends by the frame subsection 1?), as shown in Figs. 3 and 6, whereby ample room is'provided when and in the event it is found desirable to mount the wheels 3 on the axle 5 (as by means of knuckles) for swinging or steering movement. In this latter arrangement, the wheels 3 will be connected with the steering gear for the wheels 2. 6 indicates plates depending from the main frame section 1a and carrying outwardly extending brackets 7. 8 indicates a platform pivotally mounted on the brackets 7 and adapted to support. the operative.

9 indicates a foot pedal connected with the usual brake mechanism for the truck, preferably normally acted upon by a spring (not shown) to bias its braking elements, such as shoes, against a brake wheel driven by the traction motor, the pedal 9 serving as the operating device to release the brake when pushed downwardly from the position shown in dotted lines in Fig. 1. 10 indicates a guard or shield for the operative fixed to the frame section 111 and extending around the platform 8. Y

The batteries 4 which are mounted on the frame section 1a are preferably enclosed in a sheet metal-casing 4a, of which one. or more sides are removable.

11 indicates a pair of uprights (only one being shown in Fig. 1) mounted on the frame section 1 a adjacent its outer end and'rigidly supporting a casing 12 which forms a support for an electric motor 13; the purpose of the motor 13 will later appear. 14: indicates a suitable controller connected by a linkage 15 with an operating lever or device 16. 17 indicates the device, such as a lever, operating through a column 18 and connectlons 19 to steer the wheels 2.

one eing relatively stationary, so that the outermost one will move a distance substantially equal to the length of all the members less the length of the outermost member and the overlap between the remaining members.

In the illustrated construction embod 'ng the principle of my invention I provide t reemembers 21, 22, 23, the innermost one (21) being relatively stationary and preferably fixedly mounted on the sub-section 1b and the outermost one ('23) servin as the load carrying member; as will be un erstood, the member 23 is movable substantially from end toend of the member 22 and the latter is movable substantially from end to end of the member 21. As a result, the operation of the power means will efiect a compound movement of the load carrying member 23 from the frame sections 1a, 16, together.

the position shown in full lines in Fig. 1 to the position shown in dotted lines therein.

The member 21 may comprise a pair of spaced I-beams serving as guides for the intermediate member 22.-

The lower ends of the I-beams 21 are connected at their lower ends to the frame members 1b and also braced by the extended portions 10 of the side plates 101 which conr iect he beams 21 are connected at their upper ends by a cross member 24 and a rod 24a; the upper ends of the beams are braced by tie members 25 connected to the uprights 11. The rod 24a serves as a shaft for a plurality of sheaves 24b, 24b, to which reference will later be made. The intermediate member comprises a pair of I-beams connected in spaced relation at their upper ends by a cross plate 26a and a rod 26 mounted in hollow bosses or hangers 27. The rod 26 serves as a shaft for sheaves 28, the purpose of which will later appear. 29 indicates a plate riveted or otherwise secured to each I-beam 22 and extending inwardly beyond but on the outer side of the adjacent I-beam 21 and an ported in spaced relation to the adjacent p ate 29. Spacing sleeves are positioned on the rods 30, 30, between the plates 32 and between each plate 32 and the adjacent plate 29 so that when the nuts 34 on the ends of the rods are tightened against the plates 29, the latter plates and plates 32 are mounted in fixed, spaced relation. The inner free ends of the lates 32 are held against inward movement y cotter pins 32a. 35 indicates flanged rollers loosely mounted on the rod 31, one thereof between each pair of plates 29, 32, and engaging the inner flange of the adjacent I- beam 21. 36 indicates stud shafts extending inwardly from the lower portions of the plates 29 and supporting flanged rollers 37, each engaging the outer flange of one of the I-beams 21. s will be understood the rollers 35, 37, co-operate to movably support the intermediate member 22 on the inner member 21, whereby the member 22 ma traverse the member 21 upon operation 0 the hoisting means to be later described, from the position shown in full lines in Fig. 1 to the position shown in dotted lines therein.

38 indicates a shaft extending between and supported in any desired manner at its opposite ends by the plates 32. 39 indicates sheaves loosely mounted on the shaft 38 for a purpose to be later set forth.

The outer or load carrying member 23 comprises a pair of plates 40 disposed on the outer sides of the I-beams 22and connected in spaced relation by rods'41, 41, 42, and a pair of plates 43 disposed on the inner sides of the I-beams and in close relation thereto respectively. The plates 43 are preferably spaced from each other by sleeves on the rods 41, 41; and each plate 43 and the adjacent plate 40 are spaced by the upright sections of L-devices 45, the horizontal sections of which are arranged to be projected below a load to lift it and hold it while being elevated, lowered or transported; these parts being rigidly connected by the tightening of nuts 46 on the outer ends of the rods 41, 41. The inner end of each plate 43 is spaced from the adjacent plate 40 by a sleeve which surrounds the adjacent rod 42 and forms a bushing for a flanged roller 47. The rollers 47 have rolling engagement with the inner flanged sides of the beams 22 and co-operate with flanged rollers 48 engaging the outer flanged sides of the beams 22 to movably support the member 23 thereon. The rollers 48 are preferably mounted on shafts 49 one thereof being supported by each plate 40 and the adjacent plate 43. The load engaging element of the loadcarrying member 23 may be constructed in any desired manner dependingupon the character of the loads to be handled. The L-devices are shown to illustrate one suitable form of construction. In this form I oad engaging or horizontal sections a plate The hoisting mechanism comprises the motor 13 (already referred to), transmitting its power through a suitable driving mechanism oused in ,a portion of the casting 12to a drum 50, fora flexible hoisting member51, which winds'on and off the drum. I referably provide two. drums 50 and two exible members, such as wire cables. The flexible members maybe connected with all of the relatively movable members 21, 22, 23, inseries and by the proper arrangement of suitable r'eeving devices or sheaves thereoneffect their relative movement and thereby cause the outer member 23 to move to the extreme lowerposition and extreme upper position as already described. However, to .provide for adequate lifting power and long travel of the load carrying member due to the compounding of the elevating mechanism I prefer to operatively connect the flexible members 51 with the intermediate member 22 to raise and lower it relative to the relatively stationary member 21 and to provide preferably two thereof, connected at their inner ends to the frame 1 and running over the-sheaves 28 and connected at their outer ends to the load carrying member 23,- so that the movement of the member 22 in either direction will cause the member 23 to move twice as fast as or double the distance moved during any period of time relative to the floor or other fixed point, by the member 22. In the arrangement abovedescribed, the movement of 'the outer member 23 is proportional to and dependent upon the movement of the inter mediate member 22. As the members 21 and 22 are of the same height and the member 23 52 to the slack take-up mechanism 53; The

inner ends in a suitable manner to lugs 54 provided on plates.55 securedto the outer sides of frame bars or'members 1?). Fromthese lugs the flexible members extend to and around the sheaves 28, their outer ends depending from thesesheaves and being'connected to plates 56 mounted on the inner faces ofthe plates' 1 3. 4 The motor 13 receives current from the batteries 4, thecircuit for the motor to drive it in either direction being controlled by a controller .58. A switch mechanism 59 having pairs of switch contacts is interposed in the motor circuit so that in operating the elevating mechanism 20 in either direction the circuit through one of the airs of switches will be opened when onepf t e movable members of such mechanism approaches its limit *of movement. To operate such mechanism I preferably provide two' rods 60 slidable at their lower ends in openings formed in brackets 61 (see F ig. 3) carried by the top plate- 61a; the upper ends of the rods are pivoted .-to an equalizing bar 62,'which in turn is connected by a link 63 to one :arm of a bell crank 64 loosely mounted on the shaft 240. The other arm of the bell crank is connected by a link 65 to an arm 67 which is fixed to the operating element for 'the switch mechanism. Each rod 60 carries adjustable tappets 68 near its upper and lower ends and one of these is engaged and moved by 'a lateral element 69 carried by the l ods 30, 30, as the member 22 moves upwardly or downwardly, such movement being transmitted through the linkage to the arm 67' to effect opening of the motor circuit and stopping pf the motor 13. When the rods 60 are moved downward- 1y by the engagement of the element 69 with is at the lower end of the member 22 when the lower tappets, the latter compresses coiled the latter is in its lower position, as shown in Fig. 1, it will be seen that movement of the member 22 relative to the member 21 will efiect a like relative movement of the member 23relative to the member 22, or movement of the member 23 relative to the floortwice the distance moved by the member 22. Accordingly, raising of the member 22 along its guide 21, will move the member 23 to the extreme upper end of its guide 22, as shown the adjacent sheaves 24b. 24b and 39 in a similar manner to that as set forth with respect to the first mentioned flexible member, and its outer end is connected through the equalizer springs 70 interposed between them and the brackets 1: accordingly when the member 22 is again elevated the springs 70 return the rods 60 and linkage and the switch mecha-' nism to neutral position. By the provision of collars 71 on the rods 60 below the brackets 61 and springs 72 between these collars and brackets, the rods 60, linkage and switch mechanism are returned to neutral position following the raising of the rods 60;and lowering of the member 22. 4

The slack take-up mechanism 53 comprises a weight 53' slidable between guides 53a, 53a, and having, lateral extensions engaging the lower edges of the guides to limit upward movement of the weight 53'. If slack occurs in the flexible members 51 for any reason, for

example, by reason of the member 22 engaging an obstruction in its descending movement, the weight will gravitate and hence take-up such slack. By providing the weight 53' with arms 73 and interposing these arms between the springs 72 and the brackets 60,

flexible members 51a are connected at their it will be seen that the wei ht 53, when gravitating downwardly, w' act through the springs 72 and collars 71 to move the rods 60 downwardly and effect an opening of the motor circuit.

' The load engaging sections may be disposed relatively close to or substantially in engagement with the floor when the members 22, 23, are lowered to their extreme low position as shown in Figs. 1 and 2.

It will be noted that when the movable members 22, 23, are in lowered position neither one extends above the top of the member 21, but by reason of my improved construction the tiering or raising of loads to or'removing'them from positions above the mem ber 21 can be carried out in a ready and rapid manner. By arranging and connecting the flexible hoisting members in the manner set forth the members 22, 23, are moved progressively at a uniformly accelerated speed in either direction so that the load carrying member 23 is ated and may e stopped at any desired position between the ends of its travel. It will also be noted, particularly from Fig. 5, that the load engaging section is in full view of the operative at all times. 3 I

To those skilled in the art to which my invention relates many changes in construction and widely differing embodiments and applications of my invention will suggest themselves without departing from the spirit and scope thereof. My disclosures and the description herein are purely illustrative and are not intended to be in any sense limiting.

What I claim is:

. 1. In a power driven truck, the combinetion of a wheel mounted frame,'a pair of s aced guides on said frame, a member mova ly mounted on said guides, said member comprising a pair of plates and vertically disposed guides, said plates being connected in spaced relation and disposed at the sides of said first mentioned guides and carrying rollers engaging therewith, each said plate extending forwardly beyond said first mentioned guides and carrying said last mentioned guides on their outer portions in a plane disposed parallel to said first mentioned guides, a load carrying member movably mounted on said last mentioned guides and comprising plates extending forwardly thereof and supporting at their outer ends a load supportdisposed in front of the truck frame and arranged to be lowered into close relation to the floor, and means for moving said movable member and said load carrying member relative to each other and said first mentioned guides/ 2. In a power driven truck, the combination of a wheel mounted frame, a pair of spaced guides on said frame, a member movably mounted on said guides, said member comprising a .pair of plates and vertically positively controlled and operdisposed guides, said lates being connected in spaced'relation and disposed at the sides of said first mentioned guides and carrying rollers engaging therewith, each said plate extending forwardly beyond said first mentioned guides and carrying said last mentioned uides on their outer portions in a plane tioned guides, a load carrying member movbly mounted on said last mentioned guides an comprising plates extending forwardly thereof and supporting at their outer ends a load support disposed in front of the truck frame and arranged to be lowered into close relation to the fioor, a guide sheave at the upper ends of said last mentioned guides, a flexible member connected at its inner end directly to said truck frame and running over said sheave and connected at its outer end to said load carrying member, and means for moving said first namedmovable member upwardly and downwardly.

3. In a power driven truck, the combination of a wheel mounted frame, a pair of spaced guides on said frame, a member movably'mounted on said guides, saidmember comprising a pair of plates and vertically disposed guides, said (plates being connected in spaced relation an disposed at the sides of said first mentioned guides and carrying rollers engaging therewith, each said plate isposed parallel to said first menextending forwardly beyond said first men- I tioned guides and carryingsaid last mentioned guides on their outer portions in a plane disposed arallel to said first mentioned guldes, a oad carrying member comprising plates having rollers engaging said last mentioned guidesextending forwardly thereof and supporting at their outer ends a load support disposed in front of the truck frame and arranged to be lowered into close relation to the floor, and means for moving said movable member and said load carrying member relative to each other and said first mentioned guides.

4. In a power driven truck, the combination of a wheel mounted frame, a' pair of spaced guides on said frame, a member movably mounted on said guides, said member comprising a pair of plates and vertically disposed guides, said plates being connected in spaced relation and disposed at the outer sides of said first mentioned guides and car rying rollers on their inner sides engaging therewith, each said plate extending forwardly beyond said first mentioned guides and carryingsaid last mentioned guides on their outer portions in a plane disposed parallel to and outwardly of said first mentioned guides,a load carrying member movmentioned guides.

frame and arranged to be lowered into close relation to the floor, and means for moving said movable member and said load carrying member relative In testimony signed my name.

to each other and said first whereof, I v have hereunto EDWARD H. REMDE.

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