CA1051387A - Slider/roller side shifter for use on a forklift truck - Google Patents
Slider/roller side shifter for use on a forklift truckInfo
- Publication number
- CA1051387A CA1051387A CA265,115A CA265115A CA1051387A CA 1051387 A CA1051387 A CA 1051387A CA 265115 A CA265115 A CA 265115A CA 1051387 A CA1051387 A CA 1051387A
- Authority
- CA
- Canada
- Prior art keywords
- mounting means
- bearing
- carriage
- side shifter
- forwardly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
- B66F9/14—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements
- B66F9/147—Whole unit including fork support moves relative to mast
- B66F9/148—Whole unit including fork support moves sideways
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
SLIDER/ROLLER SIDE SHIFTER FOR USE ON A FORKLIFT TRUCK
ABSTRACT OF THE DISCLOSURE
A side shifter frame unit for mounting on a forklift carriage includes sliding bearing shoes disposed in notches formed on a lip of an upper bar of the carriage. The sliding bearing shoes have a rear surface inclined at an angle steeper with respect to the horizontal than a front upper bar carriage lip surface so that a side shifting unit will not tend to "climb"
when the unit is laterally displaced. A bottom plate of the side shifter utilizes a rolling disc rotatably mounted within a housing for rolling contact with a lower bar of the carriage.
The rotatably mounted disc has its axis of rotation directed inwardly and inclined to the face of the lower bar. In one embodiment of the invention, a side shifter actuator is secured to a bracket which is demountably suspended from the upper bar.
ABSTRACT OF THE DISCLOSURE
A side shifter frame unit for mounting on a forklift carriage includes sliding bearing shoes disposed in notches formed on a lip of an upper bar of the carriage. The sliding bearing shoes have a rear surface inclined at an angle steeper with respect to the horizontal than a front upper bar carriage lip surface so that a side shifting unit will not tend to "climb"
when the unit is laterally displaced. A bottom plate of the side shifter utilizes a rolling disc rotatably mounted within a housing for rolling contact with a lower bar of the carriage.
The rotatably mounted disc has its axis of rotation directed inwardly and inclined to the face of the lower bar. In one embodiment of the invention, a side shifter actuator is secured to a bracket which is demountably suspended from the upper bar.
Description
105~387 BACKGROUND AND SUMMARY OF THE INVENTION
This invention pertains to side shifters used on lift truck carriages, and more particularly to bearings employed to facilitate transverse movement of a side shifter on the carriage.
Fork lift trucks have found wide acceptance in industry, and a particularly popular form of fork lift truck utilizes the so-called side shifter.
Side shifters typically take the form of an upper longitudinal plate connected to a lower longitudinal plate wherein the upper plate utilizes a hook arranged to slidably engage bearing shoes detachably secured within notches in a lip portion of an upper carriage bar. The lower longi-tudinal plate includes transversely movable, rearwardly-facing sliding or rolling bearings which, under load, exert an extremely high compressive force against the face of the carriage. A hydraulic cylinder assembly interposed between the carriage and side shifter transversely displaces the side shifter frame with respect to the lift truck carriage upon actuation of the cylinder assembly. The forwardly-protruding forks or other carrying means are suspended by upper fork hooks arranged over the upper plate in order to hold a load.
One problem with existing forklift truck side shifter units resides in the fact that bearing wear is heavy and friction is relatively high. This problem is most notable in the area of the lower bearings because of the extremely high compressive contact stresses, accentuated by impact loading, at these points. This situation results in high maintenance costs, as well as in high energy usage in operating a side shifter.
_ ~ ,.
1051~'7 According to the pres~nt invention there is provided a side shifter adapted for mounting upon the front of a vertically movable lift truck carriage, of the ~ype having a transverse mounting member adjacent the top of the car-riage and a transverse forwardly-facing surface below said transverse mount-ing member, for mounting a load-handling attachment on the carriage with the side shifter interposed structurally between the carriage and attachment so that the atta~hment is transversely movable with respect to the carriage, said side shifter comprising: (a) forwardly-facing front mounting means for mounting the load-handling attachment thereon; (b) first rearwardly-facing mounting means connected to said front mounting means for movably engaging the transverse mounting member of said carriage so as to vertically support said front mounting means and permit said front mounting means to move trans-versely with respect to said carriage; (c) second rearwardly-facing mounting means connected to said front mounting means, at a location below said first rearwardly-facing mounting means, for movably engaging the forwardly-facing surface of said carriage, said second rearwardly-facing mounting means com-prising a substantially disc-shaped bearing having means defining a rear-wardly-facing, generally spherical convex bearing surface on one side thereof for rollingly contacting the forwardly-facing surface of said carriage and having means defining a forwardly-facing surface on the side thereof opposite said convex bearing surface; and (d) bearing mounting means on said front mounting means, for rotatably mounting said disc-shaped bearing upon said front mounting means, comprising rearwardly-facing surface means for rotat-ably engaging said forwardly-facing surface of said disc-shaped bearing.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a partial frontal view showing approximately one-half of a side shifter apparatus ~ 0~ '7 mounted on upper and lower carriage bars of a forklift truck, the forklift truck not being shown;
FIG. 2 is a view taken along lines 2-2 of FIG. l;
FIG. 3 is an enlarged view of the sliding bearing shoe contacting hook shown in FIG. 2;
FIG. 4 is a partial frontal view of a side shifter unit illustrating the demountable side shifter actuator hanger bracket of the present invention;
FIG. 5 is a view taken along lines 5-5 of FIG. 4; and FIG. 6 is a view similar to that illustrated in FIG. 3 and shows another hook embodiment.
DETAILED DESCRIPTION OF THE INVENTION
Turning now to the drawings, and initially referring more particularly to FIGS. 1, 2 and 3, indicated generally at 10 is a side shifter apparatus in accordance with the present invention. While a forklift truck is not illustrated, it is to be remembered that upper and lower carriage bars 12 and 14, respectively, are secured to a vertical raising and lowering device on a forklift truck. Upper and lower carriage bars 12 and 14 are connected together by appropriate joints (not shown).
Upper carriage bar 12 is formed with a lip 12a which has an upper surface 12_, an inclined rear face 12c and a rear ledge 12d. Rear face 12c is constructed so that forks of a forklift truck may be releasably attached thereto. Upper carriage bar 12 is also provided with a plurality of notches 13 formed in lip section 12a arranged to receive sliding bearing shoes, to be l(~S~ '7 hereinafter particularly described.
Side shifter apparatus 10 is constructed with an upper transversely extending plate 16 which is joined by appropriate cross pieces 18 (one of the cross pieces is not shown, in that FIG. 1 illustrates only approximately one-half of a side shifter frame) to a lower transversely extending plate 20. Upper plate 16 is welded or otherwise attached to a connecting plate 22 which is secured to a generally inverted U-shaped hook 24.
While not illustrated, it is to be understood that another connecting plate 22 would be arranged on the right of side shifter apparatus 10 similar to illustrated plate 22. Hook 24 is arranged to slidably engage bearing shoes 26. Sliding bearing shoes 26 provide bearing engagement for sliding contact with generally ~-shaped hook 24. Sliding bearing shoes 26 may conven-iently be constructed with a generally Z-shaped cross section and are removably mounted within notches 13.
As can be best seen from a consideration of FIG. 3, sliding bearing shoes 26 have a first face 26a arranged for contact with rear face L2c. Shoes 26 are provided with lugs 26b which engage notches 13. Surface 26a is formed with generally the same angle with respect to the vertical as in face 12c.
Such an angle, designated at A, may be approximately 20.
However, a second shoe face 26c is formed with a greater angle with respect to the horizontal than is face 26a. For instance, angle B may be arranged at approximately 15 with respect to the vertical. As a consequence, face 24a of hook 24 remains in contact with shoe face 26c without tending to climb or ride upwardly when side shifter 10 is displaced laterally. Further-more, it is to be noted that hook 24 has a bottom face 24b which slidably contacts leg segment 26d of sliding bearing shoe 26.
The sliding bearing shoes may be made of nylon filled with molydisulfide.
~ O~j~ 3(~7 Connected to lower shifter plate 20 is a housing 28 containing in a pocket formed therein a rotatable case hardened steel disc 30. Disc 30 has a convex curvilinear surface 30a for contacting lower bar carriage surface 14a and also has a concave inner surface 30b. Additionally, housing 28 is disposed against lower carriage bar surface 14a. Disc 30 is set at an angle, i.e., rotation axis C is set at an angle to face 14a. Thus, it can be seen that when shifter 10 is laterally displaced, disc 30 rotates within sprocket 28 and rollingly contacts lower carriage bar 14 in a region 14_ on bar surface 14a. Such contact is essentially point contact.
A housing seating cup 32 is welded or otherwise at-tached to a rear face of plate 20 and includes angled portions 32a, 32_. Housing 28 has abutments 28a, 28b which allow inser-tion of the housing into cup 32 as shown. Thus, replacement of a roller disc 30 may be readily effected by removal of housing 28 -and its contained disc, and inserting a new housing and disc into cup 32. Housing 28 may not inadvertently be placed upside down in cup 32 because of the aforementioned abutments 28a, 28b. A
further hook 34 is attached to a lower segment of cup 32 and is arranged to fit about carriage bar lip 14c to prevent substantial horizontal displacement.
A preferred embodiment of the present invention incorporates a plurality of replaceable wear shoes 26 and two housings 28 and discs 30. Also, depending from upper carriage bar 12 is a mounting bracket 36 which connects a hydraulic cylinder 38 to a rod 40 which is in turn connected to plate 18.
Hydraulic cylinder 38 is connected to mounting bracket 36 by means of a pivot connection 37. As hydraulic fluid under pres-sure is admitted through fitting 38a from a source (not shown) rod 40 is displaced to the left thereby laterally displacing side shifter unit 10 to the left. Correspondingly, when fluid lO ~ '7 under pressure is introduced through fitting 38b, rod 40 is displaced to the right thereby laterally displacing side shifter 10 to the right.
An additional feature of side shifter 10 of the present invention is also shown in FIGS. 4 and 5 and includes a readily demountable side shifter actuator hanger bracket 42. Hanger bracket 42 is provided with a leg 44 including a hook 46 having a catch or lug 46a arranged to be disposed within a cut-away central portion or notch 13. A top surface 44a of leg 44 is constructed to lie beneath the top surface of sliding bearing shoes 26. Thus, it can be appreciated that no contact between a lower surface of hook 24 will occur against top surface 44_.
Hanger bracket 42 is securely clamped to the bottom of upper carriage bar 12 by means of screw clamps 46. Connected to hanger bracket 42 is a mounting bracket 48 which is connected to cylinder 38. Cylinder 38 utilizes a rod 40 connected to joint 18 as previously described.
Removal of hanger bracket 42 may be accomplished as follows. Pin 50 is removed from bracket 52 to permit lateral displacement of side shifter 10 to the left for removal of same from carriage bars 12 and 14. Then, clamping bolts 46 may be loosened from contacting the lower face of upper carriage bar 12. Hanger bracket 42 may then be slightly pivoted and pulled upwardly out of notch contacting position for ready removal therefrom. Thus, it can be appreciated that the novel configura-tion of hanger bracket 42 and central leg 44 provide for ready mounting and demounting of a side shifter actuator 38, 40.
With reference now directed particularly to FIG. 6, there is illustrated a further embodiment of a hook connected to a side shifter. This hook is one that may be used in the setting of a side shifter like that shown in Figs. 1-3, inclusive.
Specifically, attached to upper bar 16 is a generally U-shaped lO.jit~
hook 25 having a surface 25a contacting a top leg 26e of sliding bearing shoe 26. Hook 25 includes an integrally formed leg 25b secured to upper plate 16. Hook 25 and leg 25_ extend substan-tially continuously the length of the carriage.
In the embodiment shown in Figs. 1, 2 and 3, hook 24 is continuous, and provides overhead protection for the tops of the wear shoes. This minimizes dust accumulation. A modifica-tion which could be made is to use one elongated connecting plate 22 with this hook, rather than two laterally spaced plates.
Such a modification would further minimize dust accumulation.
Further, it will be noted that discs 30 are substantially sealed against exposure to the environment.
In the em~odiment shown in Figs. 4 and 5, the hook still extends over a substantial portion of the wear shoes at all times, thus to provide protection.
While a preferred embodiment of the invention has been described herein, it should be apparent to those skilled in the art that variations and modifications are possible without departing from the spirit and scope of the present invention defined in the appended claims.
This invention pertains to side shifters used on lift truck carriages, and more particularly to bearings employed to facilitate transverse movement of a side shifter on the carriage.
Fork lift trucks have found wide acceptance in industry, and a particularly popular form of fork lift truck utilizes the so-called side shifter.
Side shifters typically take the form of an upper longitudinal plate connected to a lower longitudinal plate wherein the upper plate utilizes a hook arranged to slidably engage bearing shoes detachably secured within notches in a lip portion of an upper carriage bar. The lower longi-tudinal plate includes transversely movable, rearwardly-facing sliding or rolling bearings which, under load, exert an extremely high compressive force against the face of the carriage. A hydraulic cylinder assembly interposed between the carriage and side shifter transversely displaces the side shifter frame with respect to the lift truck carriage upon actuation of the cylinder assembly. The forwardly-protruding forks or other carrying means are suspended by upper fork hooks arranged over the upper plate in order to hold a load.
One problem with existing forklift truck side shifter units resides in the fact that bearing wear is heavy and friction is relatively high. This problem is most notable in the area of the lower bearings because of the extremely high compressive contact stresses, accentuated by impact loading, at these points. This situation results in high maintenance costs, as well as in high energy usage in operating a side shifter.
_ ~ ,.
1051~'7 According to the pres~nt invention there is provided a side shifter adapted for mounting upon the front of a vertically movable lift truck carriage, of the ~ype having a transverse mounting member adjacent the top of the car-riage and a transverse forwardly-facing surface below said transverse mount-ing member, for mounting a load-handling attachment on the carriage with the side shifter interposed structurally between the carriage and attachment so that the atta~hment is transversely movable with respect to the carriage, said side shifter comprising: (a) forwardly-facing front mounting means for mounting the load-handling attachment thereon; (b) first rearwardly-facing mounting means connected to said front mounting means for movably engaging the transverse mounting member of said carriage so as to vertically support said front mounting means and permit said front mounting means to move trans-versely with respect to said carriage; (c) second rearwardly-facing mounting means connected to said front mounting means, at a location below said first rearwardly-facing mounting means, for movably engaging the forwardly-facing surface of said carriage, said second rearwardly-facing mounting means com-prising a substantially disc-shaped bearing having means defining a rear-wardly-facing, generally spherical convex bearing surface on one side thereof for rollingly contacting the forwardly-facing surface of said carriage and having means defining a forwardly-facing surface on the side thereof opposite said convex bearing surface; and (d) bearing mounting means on said front mounting means, for rotatably mounting said disc-shaped bearing upon said front mounting means, comprising rearwardly-facing surface means for rotat-ably engaging said forwardly-facing surface of said disc-shaped bearing.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a partial frontal view showing approximately one-half of a side shifter apparatus ~ 0~ '7 mounted on upper and lower carriage bars of a forklift truck, the forklift truck not being shown;
FIG. 2 is a view taken along lines 2-2 of FIG. l;
FIG. 3 is an enlarged view of the sliding bearing shoe contacting hook shown in FIG. 2;
FIG. 4 is a partial frontal view of a side shifter unit illustrating the demountable side shifter actuator hanger bracket of the present invention;
FIG. 5 is a view taken along lines 5-5 of FIG. 4; and FIG. 6 is a view similar to that illustrated in FIG. 3 and shows another hook embodiment.
DETAILED DESCRIPTION OF THE INVENTION
Turning now to the drawings, and initially referring more particularly to FIGS. 1, 2 and 3, indicated generally at 10 is a side shifter apparatus in accordance with the present invention. While a forklift truck is not illustrated, it is to be remembered that upper and lower carriage bars 12 and 14, respectively, are secured to a vertical raising and lowering device on a forklift truck. Upper and lower carriage bars 12 and 14 are connected together by appropriate joints (not shown).
Upper carriage bar 12 is formed with a lip 12a which has an upper surface 12_, an inclined rear face 12c and a rear ledge 12d. Rear face 12c is constructed so that forks of a forklift truck may be releasably attached thereto. Upper carriage bar 12 is also provided with a plurality of notches 13 formed in lip section 12a arranged to receive sliding bearing shoes, to be l(~S~ '7 hereinafter particularly described.
Side shifter apparatus 10 is constructed with an upper transversely extending plate 16 which is joined by appropriate cross pieces 18 (one of the cross pieces is not shown, in that FIG. 1 illustrates only approximately one-half of a side shifter frame) to a lower transversely extending plate 20. Upper plate 16 is welded or otherwise attached to a connecting plate 22 which is secured to a generally inverted U-shaped hook 24.
While not illustrated, it is to be understood that another connecting plate 22 would be arranged on the right of side shifter apparatus 10 similar to illustrated plate 22. Hook 24 is arranged to slidably engage bearing shoes 26. Sliding bearing shoes 26 provide bearing engagement for sliding contact with generally ~-shaped hook 24. Sliding bearing shoes 26 may conven-iently be constructed with a generally Z-shaped cross section and are removably mounted within notches 13.
As can be best seen from a consideration of FIG. 3, sliding bearing shoes 26 have a first face 26a arranged for contact with rear face L2c. Shoes 26 are provided with lugs 26b which engage notches 13. Surface 26a is formed with generally the same angle with respect to the vertical as in face 12c.
Such an angle, designated at A, may be approximately 20.
However, a second shoe face 26c is formed with a greater angle with respect to the horizontal than is face 26a. For instance, angle B may be arranged at approximately 15 with respect to the vertical. As a consequence, face 24a of hook 24 remains in contact with shoe face 26c without tending to climb or ride upwardly when side shifter 10 is displaced laterally. Further-more, it is to be noted that hook 24 has a bottom face 24b which slidably contacts leg segment 26d of sliding bearing shoe 26.
The sliding bearing shoes may be made of nylon filled with molydisulfide.
~ O~j~ 3(~7 Connected to lower shifter plate 20 is a housing 28 containing in a pocket formed therein a rotatable case hardened steel disc 30. Disc 30 has a convex curvilinear surface 30a for contacting lower bar carriage surface 14a and also has a concave inner surface 30b. Additionally, housing 28 is disposed against lower carriage bar surface 14a. Disc 30 is set at an angle, i.e., rotation axis C is set at an angle to face 14a. Thus, it can be seen that when shifter 10 is laterally displaced, disc 30 rotates within sprocket 28 and rollingly contacts lower carriage bar 14 in a region 14_ on bar surface 14a. Such contact is essentially point contact.
A housing seating cup 32 is welded or otherwise at-tached to a rear face of plate 20 and includes angled portions 32a, 32_. Housing 28 has abutments 28a, 28b which allow inser-tion of the housing into cup 32 as shown. Thus, replacement of a roller disc 30 may be readily effected by removal of housing 28 -and its contained disc, and inserting a new housing and disc into cup 32. Housing 28 may not inadvertently be placed upside down in cup 32 because of the aforementioned abutments 28a, 28b. A
further hook 34 is attached to a lower segment of cup 32 and is arranged to fit about carriage bar lip 14c to prevent substantial horizontal displacement.
A preferred embodiment of the present invention incorporates a plurality of replaceable wear shoes 26 and two housings 28 and discs 30. Also, depending from upper carriage bar 12 is a mounting bracket 36 which connects a hydraulic cylinder 38 to a rod 40 which is in turn connected to plate 18.
Hydraulic cylinder 38 is connected to mounting bracket 36 by means of a pivot connection 37. As hydraulic fluid under pres-sure is admitted through fitting 38a from a source (not shown) rod 40 is displaced to the left thereby laterally displacing side shifter unit 10 to the left. Correspondingly, when fluid lO ~ '7 under pressure is introduced through fitting 38b, rod 40 is displaced to the right thereby laterally displacing side shifter 10 to the right.
An additional feature of side shifter 10 of the present invention is also shown in FIGS. 4 and 5 and includes a readily demountable side shifter actuator hanger bracket 42. Hanger bracket 42 is provided with a leg 44 including a hook 46 having a catch or lug 46a arranged to be disposed within a cut-away central portion or notch 13. A top surface 44a of leg 44 is constructed to lie beneath the top surface of sliding bearing shoes 26. Thus, it can be appreciated that no contact between a lower surface of hook 24 will occur against top surface 44_.
Hanger bracket 42 is securely clamped to the bottom of upper carriage bar 12 by means of screw clamps 46. Connected to hanger bracket 42 is a mounting bracket 48 which is connected to cylinder 38. Cylinder 38 utilizes a rod 40 connected to joint 18 as previously described.
Removal of hanger bracket 42 may be accomplished as follows. Pin 50 is removed from bracket 52 to permit lateral displacement of side shifter 10 to the left for removal of same from carriage bars 12 and 14. Then, clamping bolts 46 may be loosened from contacting the lower face of upper carriage bar 12. Hanger bracket 42 may then be slightly pivoted and pulled upwardly out of notch contacting position for ready removal therefrom. Thus, it can be appreciated that the novel configura-tion of hanger bracket 42 and central leg 44 provide for ready mounting and demounting of a side shifter actuator 38, 40.
With reference now directed particularly to FIG. 6, there is illustrated a further embodiment of a hook connected to a side shifter. This hook is one that may be used in the setting of a side shifter like that shown in Figs. 1-3, inclusive.
Specifically, attached to upper bar 16 is a generally U-shaped lO.jit~
hook 25 having a surface 25a contacting a top leg 26e of sliding bearing shoe 26. Hook 25 includes an integrally formed leg 25b secured to upper plate 16. Hook 25 and leg 25_ extend substan-tially continuously the length of the carriage.
In the embodiment shown in Figs. 1, 2 and 3, hook 24 is continuous, and provides overhead protection for the tops of the wear shoes. This minimizes dust accumulation. A modifica-tion which could be made is to use one elongated connecting plate 22 with this hook, rather than two laterally spaced plates.
Such a modification would further minimize dust accumulation.
Further, it will be noted that discs 30 are substantially sealed against exposure to the environment.
In the em~odiment shown in Figs. 4 and 5, the hook still extends over a substantial portion of the wear shoes at all times, thus to provide protection.
While a preferred embodiment of the invention has been described herein, it should be apparent to those skilled in the art that variations and modifications are possible without departing from the spirit and scope of the present invention defined in the appended claims.
Claims (6)
1. A side shifter adapted for mounting upon the front of a vertically movable lift truck carriage, of the type having a transverse mounting member adjacent the top of the carriage and a transverse forwardly-facing surface below said transverse mounting member, for mounting a load-handling attachment on the carriage with the side shifter interposed structurally between the carriage and attachment so that the attachment is transversely movable with respect to the carriage, said side shifter comprising:
(a) forwardly-facing front mounting means for mounting the load-handling attachment thereon;
(b) first rearwardly-facing mounting means con-nected to said front mounting means for movably engaging the transverse mounting member of said carriage so as to vertically support said front mounting means and permit said front mounting means to move transversely with respect to said carriage;
(c) second rearwardly-facing mounting means con-nected to said front mounting means, at a location below said first rearwardly-facing mounting means, for movably engaging the forwardly-facing surface of said carriage, said second rearwardly-facing mounting means comprising a substantially disc-shaped bearing having means defining a rearwardly-facing, generally spherical convex bearing surface on one side thereof for rollingly contacting the forwardly-facing surface of said carriage and having means defining a forwardly-facing surface on the side thereof opposite said convex bearing surface; and (d) bearing mounting means on said front mounting means, for rotatably mounting said disc-shaped bearing upon said front mounting means, com-prising rearwardly-facing surface means for rotatably engaging said forwardly-facing surface of said disc-shaped bearing.
(a) forwardly-facing front mounting means for mounting the load-handling attachment thereon;
(b) first rearwardly-facing mounting means con-nected to said front mounting means for movably engaging the transverse mounting member of said carriage so as to vertically support said front mounting means and permit said front mounting means to move transversely with respect to said carriage;
(c) second rearwardly-facing mounting means con-nected to said front mounting means, at a location below said first rearwardly-facing mounting means, for movably engaging the forwardly-facing surface of said carriage, said second rearwardly-facing mounting means comprising a substantially disc-shaped bearing having means defining a rearwardly-facing, generally spherical convex bearing surface on one side thereof for rollingly contacting the forwardly-facing surface of said carriage and having means defining a forwardly-facing surface on the side thereof opposite said convex bearing surface; and (d) bearing mounting means on said front mounting means, for rotatably mounting said disc-shaped bearing upon said front mounting means, com-prising rearwardly-facing surface means for rotatably engaging said forwardly-facing surface of said disc-shaped bearing.
2. The side shifter of claim 1 wherein said rearwardly-facing surface means of said bearing mounting means rotatably engages said forwardly-facing surface of said disc-shaped bearing over an area substantially coexten-sive with said convex surface of said bearing so as to transmit forces from said front mounting means through said area toward the forwardly-facing surface of said carriage.
3. The side shifter of claim 1 wherein said bearing mounting means includes means for requiring said bearing to rotate about an axis of rotation which is inclined upwardly in a direction from front to rear.
4. The side shifter of claim 3 including means for detachably operatively mounting said bearing mounting means upon said front mounting means in an orientation requiring said bearing to rotate about said inclined axis, and for preventing the mounting of said bearing mounting means in any other operative orientation.
5. The side shifter of claim 3 wherein said rearwardly-facing surface of said bearing mounting means is inclined forwardly so as to require said bearing to rotate about said inclined axis.
6. The side shifter of claim 5 wherein said front mounting means includes means defining a cup on said front mounting means for detachably accepting the insertion of said bearing mounting means therein, said cup and bearing mounting means having complementary-shaped means for permitting the insertion of said bearing mounting means into said cup only in a single operative orientation such that said rearwardly-facing surface of said bearing mounting means is in said forwardly inclined position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63807975A | 1975-12-05 | 1975-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1051387A true CA1051387A (en) | 1979-03-27 |
Family
ID=24558557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA265,115A Expired CA1051387A (en) | 1975-12-05 | 1976-11-08 | Slider/roller side shifter for use on a forklift truck |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS598640B2 (en) |
| AU (1) | AU498524B2 (en) |
| CA (1) | CA1051387A (en) |
| DE (2) | DE2654752A1 (en) |
| FR (1) | FR2333747A1 (en) |
| GB (1) | GB1561688A (en) |
| IT (1) | IT1074978B (en) |
| NL (1) | NL7613255A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57184896U (en) * | 1981-05-20 | 1982-11-24 | ||
| DE3301756A1 (en) * | 1983-01-20 | 1984-07-26 | Arnold Vetter Kg, 5900 Siegen | Fork prong for stackers |
| JPS59179896U (en) * | 1983-05-19 | 1984-12-01 | 小松フオ−クリフト株式会社 | Side shift device for cargo handling vehicles |
| JPS6072498U (en) * | 1983-10-25 | 1985-05-22 | 小松フオークリフト株式会社 | side shift device |
| JPS61140498A (en) * | 1984-12-13 | 1986-06-27 | 株式会社豊田自動織機製作所 | Manual fork shifter for forklift |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2822101A (en) * | 1955-04-21 | 1958-02-04 | Baker Raulang Co | Industrial truck with laterally adjustable fork member |
| US3512671A (en) * | 1968-01-12 | 1970-05-19 | Allis Chalmers Mfg Co | Side shifted lift truck carriage |
| GB1200675A (en) * | 1968-04-23 | 1970-07-29 | Lansing Bagnall Ltd | Improvements in or relating to industrial lift trucks |
| DE2165605A1 (en) * | 1971-12-30 | 1973-07-12 | Kilian Kaup Kg Ges Fuer Maschi | SIDE SHIFT ATTACHMENT FOR A LIFT LOADER |
| US3819078A (en) * | 1972-03-02 | 1974-06-25 | Erectoweld Co Ltd | Side shifter units for forklift trucks |
| FR2224397A1 (en) * | 1973-04-09 | 1974-10-31 | Linde Ag | Sideways sliding mechanism for lifting forks - has sliding support and fork carrier in common plane parallel to truck front |
-
1976
- 1976-11-08 GB GB4640476A patent/GB1561688A/en not_active Expired
- 1976-11-08 CA CA265,115A patent/CA1051387A/en not_active Expired
- 1976-11-19 AU AU19794/76A patent/AU498524B2/en not_active Expired
- 1976-11-19 IT IT5227676A patent/IT1074978B/en active
- 1976-11-29 NL NL7613255A patent/NL7613255A/en not_active Application Discontinuation
- 1976-12-03 JP JP51146044A patent/JPS598640B2/en not_active Expired
- 1976-12-03 DE DE19762654752 patent/DE2654752A1/en not_active Withdrawn
- 1976-12-03 FR FR7636617A patent/FR2333747A1/en active Pending
- 1976-12-03 DE DE19767637832 patent/DE7637832U1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT1074978B (en) | 1985-04-22 |
| FR2333747A1 (en) | 1977-07-01 |
| NL7613255A (en) | 1977-06-07 |
| DE2654752A1 (en) | 1977-06-08 |
| JPS5269150A (en) | 1977-06-08 |
| DE7637832U1 (en) | 1977-10-06 |
| AU498524B2 (en) | 1979-03-15 |
| GB1561688A (en) | 1980-02-27 |
| AU1979476A (en) | 1978-05-25 |
| JPS598640B2 (en) | 1984-02-25 |
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