GB1571377A - Underground mining machine having a conveyor - Google Patents
Underground mining machine having a conveyor Download PDFInfo
- Publication number
- GB1571377A GB1571377A GB7077/78A GB707778A GB1571377A GB 1571377 A GB1571377 A GB 1571377A GB 7077/78 A GB7077/78 A GB 7077/78A GB 707778 A GB707778 A GB 707778A GB 1571377 A GB1571377 A GB 1571377A
- Authority
- GB
- United Kingdom
- Prior art keywords
- end portion
- body portion
- stabilizing member
- conveyor assembly
- conveyor
- 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
- 238000005065 mining Methods 0.000 title claims description 40
- 230000000087 stabilizing effect Effects 0.000 claims description 84
- 230000001154 acute effect Effects 0.000 claims description 10
- 238000013459 approach Methods 0.000 claims description 4
- 230000000452 restraining effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 description 19
- 239000003381 stabilizer Substances 0.000 description 7
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G41/00—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames
- B65G41/001—Supporting frames or bases for conveyors as a whole, e.g. transportable conveyor frames with the conveyor adjustably mounted on the supporting frame or base
- B65G41/002—Pivotably mounted
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/20—General features of equipment for removal of chippings, e.g. for loading on conveyor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Framework For Endless Conveyors (AREA)
Description
(54) AN UNDERGROUND MINING MACHINE HAVING A CONVEYOR
(71) We NATIONAL MINE SERVICE
COMPANY, a corporation organized and existing under the laws of the State of West
Virginia, United States of America, of 4900/600 Grant Street, Pittsburgh, Pennsylvania 15219. United States of America, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates to an underground mining machine and more particularly to such a machine having a conveyor assembly.
In underground mining operations the cutting device of a mining machine is operable to dislodge solid mineral material from the mine face. The dislodged material is moved rearwardly of the cutting device by a gathering device onto the forward or receiving end portion of a conveyor assembly that extends longitudinally on the body portion of the mining machine. The conveyor assembly is pivotally connected at its forward end portion to the machine body portion and includes a discharge end portion that extends rearwardly of the machine body portion. A flexible continuous flight conveyor is supported by the frame of the conveyor assembly and extends rearwardly of the cutting device.
The continuous conveyor is operable to transport the dislodged material to the discharge end portion. The discharge end portion is vertically adjustable relative to the machine body portion by operation of elevation cylinder assemblies and also includes a pivotal section which permits the discharge end portion to swing laterally through an angle of 45" relative to the front end portion of the continuous conveyor. With this arrangement the discharge end portion of the continuous conveyor is maintained in material receiving relation with a material haulage vehicle or conveyor as the mining machine is maneuvered through the mine.
By maintaining the discharge end portion in material receiving relation with the haulage vehicle, a continuous mining operation is carried out by the conveyance of the loose material from the mine face.
The conveyor assembly is supported at a preselected height by the elevation cylinders with a substantial portion of the discharge end portion extending unsupported from the rearward end of the mining machine.
The elevation cylinders are pivotally connected at one end portion to the machine body portion and at the opposite end portion to the conveyor frame. Extension and retraction of the elevation cylinder assemblies pivots the conveyor assembly about its pivotal connection to the machine body portion to raise and lower the discharge end portion through a substantially vertical arc.
Once the discharge end portion has been raised to a preselected height, the cylinders maintain this position as the continuous conveyor mechanism is operated to transfer the mined material from the receiving end portion to the discharge end portion and therefrom into the haulage vehicle.
Consequently, with this arrangement, particularly during tramming of the machine, the overall stability of the conveyor is reduced to the extent that the conveyor is subject to undesirable swaying movement resulting in spillage of the mined material over the sideboards of the conveyor. Therefore, a problem is presented in restraining the conveyor assembly from swaying laterally above the machine body portion.
According to the present invention there is provided an underground mining machine that includes a body portion, a conveyor assembly having a forward end portion and a rearward end portion, said conveyor assembly extending longitudinally above the body portion with said forward end portion being pivotally connected to said body portion, a conveyor stabilizing member positioned between said conveyor assembly and said body portion, pivot means pivotally connecting one end portion of said stabilizing member to said conveyor assembly, and said stabilizing member having its opposite end portion positioned on said body portion to restrain said conveyor assembly from lateral swaying movement above said body portion.
Preferably an extensible means, such as a piston and cylinder assembly, is pivotally connected at one end portion to the machine body portion in underlying relation with the conveyor assembly. The piston rod of the piston and cylinder assembly is pref- erably connected by a universal joint to the lower surface of the conveyor frame. The pivotal connection of the piston rod to the conveyor assembly is adjacent the pivotal connection of the stabilizing member to the conveyor assembly.With the piston rod in a retracted position within the cylinder of the piston and cylinder assembly the conveyor assembly is maintained at a lowermost position on the body portion, The piston and cylinder assembly maintains the conveyor assembly at a preselected vertical height above the body portion; while the stabilizing member serves to rigidify the conveyor assembly on the body portion to restrain the conveyor assembly from swaying laterally, particularly during tramming of the mining machine.
Upon actuation of the piston and cylinder assembly the rod is extended therefrom to vertically raise the conveyor assembly about its pivotal connection at the forward end portion to the machine body portion. As the conveyor assembly pivots upwardly the discharge end portion is raised through a vertical arc. Also, the stabilizing member pivots at its upper end portion about the hinged connection to the conveyor assembly and the lower end portion of the stabilizing member slides longitudinally on the horizontal surface of the machine body portion.
The body portion preferably includes a pair of spaced parallel, vertically extending sidewalls. The stabilizing member is positioned between the sidewalls with the lateral edges of the stabilizing member closely adjacent to the sidewalls. With this arrangement, the sidewalls maintain longitudinal movement of the stabilizing member lower end portion on the machine body portion. This serves to confine the conveyor assembly to vertical pivotal movement when raised and lowered and to prevent undesirable lateral swaying movement of the conveyor assembly.
The upper end portion of the stabilizing member, which may include an elongated plate member, is hingedly connected to the lower surface of the conveyor assembly about a horizontal pivotal axis. A pin member extends through a bore of a rolled portion at the upper end portion of the plate member with the end portions of the pin member retained in brackets extending downwardly from the conveyor assembly.
The lower end portion of the plate member is slidable on the upper horizontal surface of the body portion frame.
When the piston rod of the piston and cylinder assembly is fully retracted, the conveyor assembly is positioned substantially horizontal on the body portion, and the stabilizing plate approaches a horizontal position. With the piston rod fully extended the conveyor assembly is pivoted upwardly, and the stabilizing plate approaches a vertical position. Thus, as the conveyor assembly is pivoted upwardly, the stabilizing plate prevents the conveyor assembly from swaying laterally above the body portion. As the conveyor assembly is raised and lowered the stabilizing plate serves to maintain movement of the rearward end portion through an arcuate vertical path.
In one embodiment the stabilizing member is slidably retained at the lower end portion in longitudinal slots in vertical sidewalls of the machine body portion. A pair of pin members or rollers extending laterally of the stabilizing member are positioned within the longitudinal slots. This arrangement maintains longitudinal movement of the stabilizing member on the body portion so that the conveyor assembly moves only vertically and is restrained from lateral swaying movement.
Some embodiments of the invention will now be described, by way of examples, with reference to the accompanying drawings, in which:
Figure 1 is a fragmentary view in side elevation of a conveyor assembly of a mining machine, illustrating a stabilizer assembly pivotally connected to the conveyor and supported for longitudinal movement on the mining machine body for supporting the end of the conveyor assembly at a preselected vertical height,
Figure 2 is a sectional end view of the conveyor assembly taken along the line 2-2 of Figure 1, illustrating the stabilizer assembly hingedly connected to the conveyor assembly and positioned for longitudinal movement on the mining machine frame,
Figure 3 is a view similar to that of Figure 2, illustrating another embodiment of the stabilizer assembly,
Figure 4 is a fragmentary view in side elevation of the conveyor assembly, illustrating the connection of the stabilizer assembly to the conveyor assembly and the mining machine frame for stabilizing the conveyor assembly in a tramming position on the min in machine, and
Figure 5 is a view similar to Figure 4, illustrating the stabilizer assembly in an elevated position.
Referring to the drawings, nnd particularly to Figure 1, there is illustrated a mining machine generally designated by the numeral 10 that has a body or frame portion 12 mounted on propelling devices 14, such as endless crawler tracks. Suitable motors are provided to propel the mining machine 10 on the endless crawler tracks 14 and advance the mining machine during the mining operation. A laterally flexible conveyor assembly, generally designated by the numeral 16 extends longitudinally on the body portion 12 and includes a frame portion 18 for supporting an endless conveyor mechanism. As illustrated in Figures 4 and 5 the support frame 18 includes a forward end portion 17 and a rearward end portion 19 with the forward end portion 17 having a pivot point 20 for connecting the frame 18 to the body portion 12 about a horizontal pivot.With this arrangement the rearward end portion 19 of the support frame 18 is raised and lowered through a pivotal arc about the pivot point 20.
The rearward end portion 19 of the conveyor support frame 18 is stabilized to prevent lateral swaying movement by a conveyor stabilizing mechanism generally designated by the numeral 22 that is hingedly connected at one end portion to the support frame 18 and is positioned for slidable longitudinal movement at the opposite end portion on the body portion 12. The conveyor support frame 18 has a U-shaped configuration and forms a longitudinal trough 24. A longitudinally extending plate 25 is positioned between the sidewalls of the frame 18 above the floor of the trough 24.
The plate 25 has upper and lower horizontal surfaces 27 and 29. An endless conveyor mechanism, such as a flight-type chain conveyor (not shown), surrounds the plate 25 with the upper conveyor reach positioned on upper surface 27 and the lower conveyor reach positioned on surface 29. The endless conveyor is driven in a direction from the forward end portion 17 to the rearward end portion 19 of the conveyor to convey dislodged material rearwardly on plate 25.
Material dislodging apparatus 26, such as a cutter drum, is rotatably mounted on the front of a boom member 28 that is pivotally connected to the mining machine body portion 12.
Solid material dislodged from the mine face by the cutting action of the cutter drum 26 is gathered from the mine floor by a gathering device 30 that extends forwardly from the body portion 12. The gathering device 30 gathers the dislodged material and feeds the material rearwardly into the conveyor trough 24 onto the upper surface 27 of plate 25 at the receiving end portion of the conveyor mechanism. The dislodged material is then conveyed rearwardly on the conveyor assembly 16 to a discharge end portion generally designated by the numeral 32. United States Patent 3,774,969 discloses in greater detail the operation of the mining machine 10 in dislodging solid material from a mine face.
The conveyor support frame 18 at the discharge end portion 32 includes a conveyor boom that is arranged to swing laterally in a preselected direction by operation of piston and cylinder assemblies (not shown). The conveyor boom rotatably supports the discharging end portion of the endless conveyor mechanism. The opposite end portion of the conveyor mechanism is rotatably supported at the forward end portion 17 of the conveyor support frame 18. A suitable conveyor drive motor is mounted on the machine body portion 12 and is drivingly connected to the discharge end portion of the conveyor mechanism to rotate the conveyor in a direction from the forward end portion 17 to the rearward end portion 19.
The dislodged material is fed by the gathering device 30 onto the receiving end portion of the conveyor mechanism and is advanced rearwardly within the trough 24 from the forward end portion 17 to the rearward end portion 19 on the conveyor support frame 18. The dislodged material is transferred from the discharge end portion 32 onto a conventional section belt or into a suitable haulage vehicle for removal of the dislodged material from the mine.
Not only is the conveyor assembly 16 pivotal laterally about a vertical axis, it is also movable through a vertical arc about a horizontal axis at the pivot point 20 by operation of an extensible device generally designated by the numeral 34 in Figures 4 and 5. The extensible device 34 includes a piston and cylinder assembly 36 that is pivotally connected by a pin 38 extending through a clevis connection 40 to the machine body portion 12. The piston cylinder assembly 36 includes an extensible rod 42 that is connected by a universal joint 44 to the conveyor support frame 18. With the assembly 36 pivotally connected to the machine body portion 12, actuation of the assembly 36 to extend the rod 42 raises the discharge end portion 32 of the conveyor assembly 16 upwardly through a vertical arc.As the rod 42 extends to its full length from the assembly 36, the assembly 36 also pivots upwardly about the clevis connection 40 as illustrated in Figure 5. With this arrangement the discharge end portion 32 is vertically adjustable above the body portion
12. A single piston and cylinder assembly 36, positioned between the conveyor assembly 16 and the body portion 12, is illustrated in the figures; however, more than one may be provided for adjusting the elevation of the discharge end portion 32 above the machine body portion.
Preferably, the assembly 36 and the rod 42 are connected to the body portion 12 and the conveyor support frame 18 on the longitudinal axis thereof to provide for upward and downward movement of the conveyor assembly 16 through a vertical arc. With this above described arrangement the conveyor discharge end portion 32 is raised to a preselected vertical height above the machine body portion 12 for discharging the dislodged material onto a section belt or into a suitable haulage vehicle. By pivotally connecting the conveyor support frame 18 to the body portion 12 and through operation of the piston and cylinder assembly 36, the discharge end portion 32 is maintained in overlying relation with the section belt or haulage vehicle to ensure uninterrupted transfer of the dislodged material from the mining machine 10 for haulage out of the mine.
Once the discharge end portion 32 of the conveyor assembly 16 is raised to a preselected height above the machine body portion 12 by the extension of the rod 42, the conveyor assembly 16 is restrained from undesirable lateral swaying movement by the conveyor stabilizer 22 that is positioned between the conveyor support frame 18 and the machine body portion 12. The conveyor stabilizer 22 includes a stabilizing member 46, such as a plate as illustrated in Figures 1-5 or the stabilizing member may include other configurations such as a prop, support, jack, or the like. The preferred embodiments of the stabilizing member 46 is illustrated in the Figures 2 and 3 and includes an elongated body portion having vertical sides and a rolled upper end portion 48 with a bore 50 extending transversely therethrough.A pair of brackets 52 having bores therethrough are secured to and extend downwardly in spaced relation from the lower surface of the conveyor support frame 18. The stabilizing member 46 is positioned beneath the support frame 18 so that the rolled end portion 48 is positioned between the brackets 52 with the bore 50 aligned with the respective bores of the brackets 52.
An elongated pin 54 extends through the aligned bores of the stabilizing member end portion 48 and the brackets 52. With this arrangement the stabilizing member 46 is hingedly connected to the lower surface of the conveyor support frame 18 to pivot about a horizontal axis 56.
The body portion of the stabilizing member 46 extends downwardly from the hinged connection to the conveyor support frame 18, and a lower end portion 58 of the member 46 is positioned on horizontal surface 60 of a frame 62 of the machine body portion 12. As illustrated in Figures 2 and 3, the stabilizing member 46 includes a pair of spaced leg portions 64 that are joined at their upper end portion by a transverse body portion 66. The frame 62 of the machine body portion 12 includes a pair of spaced parallel vertical sidewalls 68 that extend upwardly from the horizontal surface 60.
The member 46 is positioned between the sidewalls 68 on the surface 60 with the sides of the member 46 positioned parallel and closely adjacent to the sidewalls 68. With this arrangement the sidewalls 68 restrain the member 46 from moving laterally on the frame 62 as the member 46 moves longitudinally.
In the embodiment of Figure 2 each of the sidewalls 68 includes a guide means such as a longitudinally extending slot or recess 70 that extends for a suitable length on the frame 62. A retaining device such as a pin member 72 is secured to and extends outwardly from each leg portion 64 of the end portion 58. The pin members 72 extend into the longitudinal slots 70 and are longitudinally slidable therein. This arrangement maintains longitudinal movement of the stabilizing member 46 on surface 60 as the member 46 pivots about the upper end portion 48 upon extension and retraction of the rod 42.
As the conveyor assembly 16 is raised from the position illustrated in Figure 4 to the position illustrated in Figure 5 by actuation of the piston cylinder assembly 36, the lower end portion 58 of the stabilizing member 46 advances longitudinally on the frame 62. The adjacent sidewalls 68 of frame 62 prevent the stabilizing member 46 from moving laterally on the frame 62. This ensures movement of the conveyor discharge end portion 32 in an arcuate vertical path preventing lateral swaying movement of the conveyor assembly 16 as it is raised and lowered. Also, when the assembly 16 has been elevated to a preselected height, the member 46 stabilizes the assembly 16, preventing lateral swaying movement thereof.
Further in accordance with the present invention, as illustrated in Figure 3, the leg portions 64 of the stabilizing member 46 are positioned on the horizontal surface 60 of the frame 62 without the addition of the pins 72 and the longitudinal slots 70 in the frame sidewalls 68. As with the embodiment illustrated in Figure 2, the stabilizing member 46 is slidably positioned on the horizontal surface 60 and the sides of member 46 are positioned closely adjacent to the frame sidewalls 68. As the rod 42 extends and retracts, the stabilizing member leg portions 64 translate longitudinally on the horizontal surface 60 with the sidewalls 68 restraining the member 46 from lateral movement.
Once the conveyor discharge end portion 32 is raised to a preselected vertical height above the body portion 12, the piston cylinder assembly 34 maintains the conveyor assembly 16 in an elevated position, as illustrated in Figure 5. The stabilizing member 46 stabilizes the assembly 16 and prevents the assembly 16 from moving laterally. The member 46 also functions to stabilize the conveyor assembly 16 when positioned in a lowermost position, as illustrated in Figure 4, during tramming of the mining machine 10. Thus, the stabilizing member 46, as illustrated in Figures 2 and 3, serves to laterally support the conveyor assembly 16 when positioned at a preselected vertical height and thereby prevent the assembly from swaying laterally.This is accomplished when the assembly 16 is pivoted to the maximum height, as illustrated in Figure 5, or to a position on the mining machine 10 for tramming, as illustrated in Figure 4.
The leg portions 64 of the stabilizing member 46 are preferably spaced apart to form an opening 74 through which the piston cylinder assembly 36 and the piston rod 42 extend. The piston cylinder assembly 36 is secured to the machine body portion 12 to centrally position the assembly between the leg portions 64 within the opening 74. As illustrated in Figure 4, when the conveyor assembly 16 is maintained in a lowermost position, the rod 42 is fully retracted and the conveyor assembly is positioned in substantially a horizontal position on the body portion 12. In this position the lower end portion 58 is extended forwardly of the horizontal pivotal axis 56 about which the rolled end portion 48 pivots to form an acute angle with the horizontal surface 60 of frame 62.
Extension of the rod 42 from the assembly 36 urges the conveyor assembly 16 to pivot upwardly about pivot point 20 and move the conveyor discharge end portion 32 through an arcuate vertical path. As the rod 42 extends, the lower end portion 58 of the stabilizing member 46 advances on the horizontal surface 60 toward the horizontal pivotal axis 56. With the embodiment of the stabilizing member 46 illustrated in Figure 2, the lower end portion 58 is guided by the movement of the pins 72 within the longitudinal slots 70. The stabilizing member 46 laterally supports the conveyor support frame 18 as it is pivoted upwardly and thereby prevents undesirable lateral movement of the support frame 18.When the rod 42 is fully extended the stabilizing member 46 approaches a vertical position on the frame 62; however, the member 46 is positioned so that the lower end portion 58 remains forward of the horizontal pivotal axis 56. Thus, the stabilizing member 46 is positioned at an acute angle with the horizontal surface 60 of the frame 62. As the conveyor assembly 16 moves between the lowermost position illustrated in Figure 4 and the uppermost position illustrated in
Figure 5, the stabilizing member 46 moves through an acute angle relative to the surface 60 so at either position, illustrated in
Figures 4 and 5, the stabilizing member 46 is positioned at an acute angle with surface 60.
WHAT WE CLAIM IS:
1. An underground mining machine having a body portion, a conveyor assembly having a forward end portion and a rearward end portion, said conveyor assembly extending longitudinally above said body portion with said forward end portion being pivotally connected to said body portion, a conveyor stabilizing member positioned between said conveyor assembly and said body portion, pivot means pivotally connecting one end portion of said stabilizing member to said conveyor assembly, and said stabilizing member having its opposite end portion positioned on said body portion to restrain said conveyor assembly from lateral swaying movement above said body portion.
2. An underground mining machine as claimed in claim 1, in which said stabilizing member has an elongated body portion provided with an upper end portion having a transverse bore extending therethrough, pivot support means extending downwardly from said conveyor assembly, and said pivot means including an elongated pin member extending through said bore of said stabilizing member with the end portions of said pin member being supported by said pivot support means to hingedly connect said stabilizing member upper end portion to said conveyor assembly.
3. An underground mining machine as claimed in claim 1, in which said stabilizing member has an upper end portion connected to said conveyor assembly by said pivot means for pivotal movement about an axis extending transversely of said conveyor assembly, said body portion having a pair of spaced parallel sidewalls, and said stabilizing member having a lower end portion positioned closely adjacent to said sidewalls for longitudinal movement on said body portion between said sidewalls to prevent lateral movement of said conveyor assembly.
4. An underground mining machine as claimed in any preceding claim, which includes extensible means having one end portion connected to said body portion and the opposite end portion connected to said conveyor assembly, said extensible means being operable to raise and lower said conveyor assembly about the pivotal connection thereof to said body portion to position said
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
1. An underground mining machine having a body portion, a conveyor assembly having a forward end portion and a rearward end portion, said conveyor assembly extending longitudinally above said body portion with said forward end portion being pivotally connected to said body portion, a conveyor stabilizing member positioned between said conveyor assembly and said body portion, pivot means pivotally connecting one end portion of said stabilizing member to said conveyor assembly, and said stabilizing member having its opposite end portion positioned on said body portion to restrain said conveyor assembly from lateral swaying movement above said body portion.
2. An underground mining machine as claimed in claim 1, in which said stabilizing member has an elongated body portion provided with an upper end portion having a transverse bore extending therethrough, pivot support means extending downwardly from said conveyor assembly, and said pivot means including an elongated pin member extending through said bore of said stabilizing member with the end portions of said pin member being supported by said pivot support means to hingedly connect said stabilizing member upper end portion to said conveyor assembly.
3. An underground mining machine as claimed in claim 1, in which said stabilizing member has an upper end portion connected to said conveyor assembly by said pivot means for pivotal movement about an axis extending transversely of said conveyor assembly, said body portion having a pair of spaced parallel sidewalls, and said stabilizing member having a lower end portion positioned closely adjacent to said sidewalls for longitudinal movement on said body portion between said sidewalls to prevent lateral movement of said conveyor assembly.
4. An underground mining machine as claimed in any preceding claim, which includes extensible means having one end portion connected to said body portion and the opposite end portion connected to said conveyor assembly, said extensible means being operable to raise and lower said conveyor assembly about the pivotal connection thereof to said body portion to position said
conveyor assembly rearward end portion at a preselected height above said body portion, and said stabilizing member having a lower end portion positioned for longitudinal movement on said body portion to maintain movement of said conveyor assembly through an arcuate vertical path.
5. An underground mining machine as claimed in claim 4, in which said extensible means includes, a piston and cylinder assembly having a base portion pivotally connected to said body portion, a rod extending outwardly from the upper end portion of said piston and cylinder assembly, means for pivotally connecting said ;od to said conveyor assembly, and said piston and cylinder assembly being operable upon actuation to extend said rod to raise said conveyor rearward end portion to a preselected height above said body portion with said stabilizing member being operable to prevent lateral swaying movement of said conveyor assembly at said preselected height.
6. An underground mining machine as claimed in claim 1, in which said conveyor assembly is pivotally connected at said forward end portion to said body portion and positioned in overlying relation therewith, said stabilizing member positioned between said conveyor assembly and said body portion, said stabilizing. member having an upper end portion pivotally connected about a horizontal axis to said conveyor assembly, said stabilizing member having a lower end portion positioned for slidable movement on said body portion, said stabilizing member lower end portion being positioned on said body portion forward of the pivotal connection of said upper end portion to said conveyor assembly, said lower end portion being longitudinally movable on said body portion, and means associated with said body portion for limiting said stabilizing member lower end portion to longitudinal movement on said body portion.
7. An underground mining machine as claimed in claim 1, in which said stabilizing member has a lower end portion positioned on said body portion, said body portion having a pair of spaced parallel vertical sidewalls, guide means in said sidewalls for receiving said stabilizing member lower end portion to maintain movement of said lower end portion in a longitudinal direction on said body portion, and means provided on said lower end portion for retaining said lower end portion within said guide means.
8. An underground mining machine as claimed in claim 1, in which said stabilizing member extends downwardly from said conveyor assembly to abut said body portion such that said stabilizing member is positioned at an acute angle with said bodv portion, and said stabilizing member being slidably supported on said body portion to maintain said conveyor assembly rearward end portion movable in an arcuate vertical path above said body portion between a lowermost position and an uppermost position where said stabilizing member is maintained at an acute angular relation with said body portion.
9. An underground mining machine as set forth in claim 8, including adjustable means supported by said body portion and connected to said conveyor assembly for pivoting said conveyor assembly to position said rearward end portion thereof at a preselected height above said body portion, and said stabilizing member being operable to restrain said conveyor assembly from lateral swaying movement when positioned at a preselected pivotal position above said body portion.
10. An underground mining machine substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78218177A | 1977-03-28 | 1977-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1571377A true GB1571377A (en) | 1980-07-16 |
Family
ID=25125243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7077/78A Expired GB1571377A (en) | 1977-03-28 | 1978-02-22 | Underground mining machine having a conveyor |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU514399B2 (en) |
| GB (1) | GB1571377A (en) |
| ZA (1) | ZA781050B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3636823A1 (en) * | 2018-10-04 | 2020-04-15 | LG Electronics Inc. -1- | Fabric treating apparatus |
-
1978
- 1978-02-22 GB GB7077/78A patent/GB1571377A/en not_active Expired
- 1978-02-22 ZA ZA00781050A patent/ZA781050B/en unknown
- 1978-03-01 AU AU33717/78A patent/AU514399B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3636823A1 (en) * | 2018-10-04 | 2020-04-15 | LG Electronics Inc. -1- | Fabric treating apparatus |
| US11390984B2 (en) | 2018-10-04 | 2022-07-19 | Lg Electronics Inc. | Fabric treating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| AU3371778A (en) | 1979-09-06 |
| AU514399B2 (en) | 1981-02-05 |
| ZA781050B (en) | 1979-09-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |