JPH1035854A - Conveyor belt lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily lift a conveyor belt of a long and large belt conveyor device by engaging a jack stand with a main frame at a position close to a return roller to be changed, and stretching a suspension beam under the conveyor belt, and lowering the oil pressure of a jack means. SOLUTION: A jack stand 6 is engaged with one of main frames 4 at a position close to a return roller 2 to be changed, and the other jack stand 6 is engaged with the other main frame 4 at an opposite position. A suspension beam 8a is respectively stretched on a support rod positioned lower than a conveyor belt 3. Oil pressure inside of each jack means 7 is lowered by a hydraulic device, and each rod 31 is shrunken for retreatment. At this stage, since the rod 31 is evenly shrunken, the suspension beam 8a or the like rises in the nearly horizontal condition, and the belt conveyor 3 is lifted up in the horizontal condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conveyor belt lifting device for lifting a return-side conveyor belt stretched on a return roller when replacing a return roller of the belt conveyor.

[0002]

2. Description of the Related Art A return roller of a belt conveyor which is installed in a coal-fired power plant or the like and transports bulk materials such as coal must be appropriately replaced due to the life of an internal bearing and damage to the roller itself. Replacement of a worn return roller is performed while lifting a conveyor belt stretched on the return roller, and the conveyor belt is generally lifted using a chain block or the like. Conveyor belt lifting devices have also been devised to increase efficiency.

[0003] As shown in FIG. 7, a conveyor belt lifting device 40 spans a beam 43 between screw type jacks 42, 42 arranged on both left and right sides of a conveyor belt 41, and moves the screw type jacks 42, 42 upward. JP-A-58-41709 (Japanese Utility Model Application No. 56-136), in which the conveyor belt 41 is raised on the beam 43 by being raised.
JP-A-63-144914 (Japanese Utility Model Application No. 62-37890), in which a roller 45 is stretched over screw type jacks 44, 44 instead of the beam 43 as shown in FIG. ) Those described in the gazette are widely known.

[0004]

However, a belt conveyor installed in a coal-fired power plant or the like is a long one, and 1000 kg is required to lift the conveyor belt.
f may require more force,
No. 41709 (Japanese Utility Model Application No. 56-13663) and Japanese Utility Model Application Laid-Open No. 63-144914 (Japanese Utility Model Application No. 62-37890).
No.) When the conveyor belt 41 is lifted or lowered by the conveyor belt lifting device described in the official gazette, the right and left jacks 42 and 44 must be sent evenly.
Excessive bending force is generated in the jacks 42 and 44 and the jacks 42 and 44
May be damaged, and the jacks 42, 4
In order to prevent breakage of the jack 4, the left and right jacks 42, 44 must be sent evenly, and a plurality of persons must work simultaneously. For this reason, there was a problem that one worker could not carry out the lifting work of the conveyor belt, resulting in poor working efficiency.

[0005] Further, the conveyor belt is generally meandering slightly due to the unevenness of the load or the mounting position error of the conveyor roller. However, when the belt is lifted, the meandering portion tends to be restored, and as a result, the conveyor belt is held. A lateral force is applied to the upper device. This force is applied to jacks 42 and 44
Is transmitted as an excessive bending force to the jacks 42 and 44 so as to withstand the strength.
Weight increases and portability is significantly impaired.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a conveyor belt lifting device capable of easily and quickly lifting a conveyor belt of a long belt conveyor device.

[0007]

In order to achieve the above object, the present invention provides a return roller for supporting a conveyor belt on the return path side of a belt conveyor below a U-shaped main frame. A jack stand having a conveyor belt lifting device for lifting the conveyor belt and supporting the return roller thereof, the jack stand having a gripper engaging and disengaging from the main frame and having a stand arm standing upright from the main frame; A jack means swingably suspended via a universal joint on the left and right inner sides of the upper end of the stand arm portion of the stand. The jack means is connected to a rod end of the jack means via a universal joint and hangs below the conveyor belt. And a suspended beam to be passed.

[0008] The holding portion of the jack stand is
A hook member having a lower end engaged with an inner lower portion of the main frame and extending upward and outward from a lower surface of the main frame; and a holding plate hinged to an upper end of the hook member and seated on the upper surface of the main frame. It is preferable that the stand arm is provided integrally on the presser plate so as to stand up.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a conveyor belt lifting device 1 is a device for lifting a conveyor belt 3 on a return roller 2 to support the return roller 2, and has a U-shaped main belt. This is used for a belt conveyor 5 having a return roller 2 that supports a conveyor belt 3 on the return path below the frames 4.

The conveyor belt lifting device 1 comprises a pair of jack stands 6, 6 arranged and fixed on both left and right sides of the conveyor belt 3, and jack means 7, 7 suspended from each of the jack stands 6, 6. And a suspension beam 8 spanned at the lower ends of these jack means 7, 7
a, 8b.

The jack stands 6, 6 are stands that are fixed to the main frames 4, 4 so as to be detachable from each other and stand up from the main frames 4, 4; It is composed of stand arms 11, 11 standing up from the main frames 4, 4.

As shown in FIG. 3, the gripping portions 30 each have a hook member 9 whose lower end engages a lower portion of the inside of the main frame 4 and extends upward and outward from the lower surface of the main frame 4. And a holding plate 10 connected to the upper end of the main frame 9 via a hinge 32 and seated on the upper surface of the main frame 4.

The hook members 9, 9 extend to the outside of the main frame 4 at the lower ends of the claw portions 12 which are engaged with the lower inner surface of the main frame 4, respectively, and one end of a bottom portion 13 which is engaged with the bottom surface of the main frame 4. And an upright portion 14 that extends to the upper outside of the main frame 4 and is engaged with the outer surface of the main frame 4 at the other end of the bottom portion 13 located below the outer side of the main frame 4. It is provided.

Each of the holding plates 10, 10 is a rod-shaped member having one end connected to the upper ends of the upright portions 14, 14 so as to be tiltable inside the main frames 4, 4, respectively. By tilting, the upper surfaces of the main frames 4 and 4 are pressed down, and the hook members 9 and 9 are
4 fixed. Also, the holding plate 10,
When the tilt 10 is tilted in this way, the other ends of the holding plates 10, 10 project outside the main frames 4, 4.

The stand arms 11, 11 are rod-shaped members formed integrally with the holding plate 10 and protruding inside the main frame 4 to suspend the jack means 7 inside the main frame 4. In addition, the holding plate 10 is provided so as to be erected when the holding plate 10 is tilted inside the main frame 4 so as to be integrally perpendicular to the other end of the holding plate 10. In the vicinity of the upper end of the stand arm portion 11 in the upright state, the jack means 7 is swingably suspended in the front-rear and left-right directions (the left direction in FIG. 2 is forward, and the right direction in FIG. 1 is right). A hanging plate 15 extending inward of the main frame 4 is integrally provided.

The jack means 7, 7 are hydraulic jacks connected to the suspension plates 15, 15 via first universal joints 16, 16, and receive hydraulic pressure from a hydraulic pressure generating device (not shown) to simultaneously and uniformly expand and contract left and right. It is supposed to. As shown in FIG. 4, the jack means 7, 7 position the rod 31 downward, and the lower end of the rod 31 has a suspension beam 8.
Support rods 17 for bridging a and 8b are suspended via second universal joints 18 and 18 so as to be swingable in the front-rear and left-right directions. The support rods 17, 17 are round rods each having a smooth surface. The center of the support rods 17, 17 is second freely adjustable so as to be parallel to the main frames 4, 4 when vertically suspended by the jack means 7, 7. It is attached to joints 18,18. Pressing plates 19, 19 are provided at both front and rear ends of the support rods 17, 17 to prevent the suspension beams 8a, 8b from dropping in the axial direction of the support rods 17, 17. The holding plates 19, 19 are discs,
It is provided concentrically so as to extend in the radial direction of 7, 17. More specifically, the universal joints 16 and 18 and the hydraulic pressure generating device are described below. The universal joints 16 and 18 are sliding bearings having a spherical pair, and the hydraulic pressure generating device is a manual pump.

As shown in FIG. 4, the suspension beams 8a, 8b
Is made of a rectangular hollow material having a rectangular cross-section.
7 and 17, respectively, are wrapped around the front and rear portions. In the vicinity of both ends of these suspension beams 8a, 8b, support rods 17,
Receiving members 20 and 20 to be engaged with 17, respectively, are provided.

As shown in FIG. 5, the receiving members 20, 20
At the lower end, there are constrictions 21 and 21 having a diameter larger than the outer diameter of the support rods 17 and 17.
The suspension beam 8 can be
The ends of a and 8b are mounted on the support rods 17 and 17, respectively. As shown in FIG. 6, near one end of each of the suspension beams 8a and 8b,
Casters 22, 22 are provided to facilitate the work of bridging 8b. Casters 22, 22
Is directed forward with the suspension beams 8a extended over the front portions of the support rods 17, 17 and supported by the suspension beams 8b extended over the rear portions of the support rods 17, 17. It is provided so as to face rearward in a state of being hung over the rods 17. In addition, caster 22
Is small enough not to hit the conveyor belt 3 when the conveyor belt 3 is put on the suspension beams 8a and 8b and lifted.

Next, the operation will be described.

When the conveyor belt lifting device 1 is mounted on the belt conveyor 5, a jack stand 6 is first engaged with one of the main frames 4 at a position close to the return roller 2 to be replaced. The jack stand 6 is engaged with the other main frame 4 at a position facing the above. Jack stands 6,6 to main frames 4,4
When first engaging the hook 12 with the claw 12
To the lower inner surface of the main frame 4
The hook member 9 is applied to the outside of the
To the inside of the main frame 4 so that the holding plate 1
0 is seated on the main frame 4. As a result, a force is applied to the upper end of the stand arm portion 11 in a direction of falling inward, and a force is applied to the holding plate 10 in a direction of lifting the other end upward with the inner end of the main frame 4 as a center. For this reason, the hook member 9 is lifted up the upright portion 14 and inside the main frame 4, so that the bottom portion 13 is pressed against the bottom surface of the main frame 4 and the claw portion 12 is pressed against the lower portion of the inner side surface of the main frame 4. As a result, the main frame 4 is firmly engaged.

Then, the suspension beams 8a and 8b are respectively laid over the support rods 17 and 17 located below the conveyor belt 3 so that the constrictions 21 and 21 of the receiving members 20 and 20 are located. At this time, the suspension beams 8a, 8b are moved onto the floor immediately below the jack means 7, 7, and then the suspension beams 8a, 8b are extended over the upper support rods 17, 17, respectively. When moving the caster 22b, the caster 22 provided at one end is grounded and the other end is held. When one end is moved while the caster 22 is running, the suspension beams 8a, 8b
Will be easily moved.

Further, the conveyor belt lifting device 1 mounted on the belt conveyor 5 in this way uses the conveyor belt 3
When lifting the rods, the hydraulic pressure in the jack means 7, 7 is lowered by a hydraulic pressure generating device to reduce the respective rods 31, 31.
Degenerate. At this time, since the rods 31 and 31 are respectively contracted evenly, the suspension beams 8a and 8b are raised while maintaining a substantially horizontal state, and the conveyor belt 3 is lifted as it is.

If the rods 31, 31 of the jack means 7, 7 do not evenly retract for any reason, the suspension beams 8a, 8b will be inclined and rise, but the suspension beams 8a, 8b will be The jack means 7, 7 are only mounted on the support rods 17, via the receiving members 20, 20, and are suspended from the stand arms 11, 11 so as to be able to swing back and forth and left and right. Therefore, no force in the bending direction is applied to the suspension beams 8a, 8b and the jack means 7, 7, and no damage is caused.

Similarly, even when the conveyor belt 3 is meandering and a restoring force is generated in the belt 3 when the belt 3 is lifted, the jack means 7, 7 swing with respect to the stand arms 11, 11. Since it is movably hung, no force in the bending direction is applied to the suspension beams 8a, 8b and the jack means 7, 7, and no damage is caused.

As described above, the conveyor belt lifting device 1
A jack stand 6,6 having a gripper 30,30 engaging and disengaging from the main frame 4,4 and having a stand arm 11,11 standing up from the main frame 4,4;
The stand arms 11 of the jack stands 6, 6
Jack means 7, which are swingably suspended via the universal joints 16, 16 at the left and right inner sides of the upper end of the upper end 11, and the universal joint 1
And the suspension beams 8a, 8b connected below the conveyor belt 3, and the rods 31, 31 of the jack means 7, 7 are evenly retracted. Suspended beams 8a, 8 without
It is possible to prevent a force in the bending direction from being applied to the b and the jack means 7, 7, and to prevent the conveyor belt lifting device 1 from being damaged.

Also, the gripping portions 3 of the jack stands 6, 6
A hook member 9 whose lower end engages with the inner lower portion of the main frame 4 and extends upward and outward from the lower surface of the main frame 4. Plate 1 seated on the upper surface
0, and the stand arm 11 is
Since the jack stand 6 is provided integrally with the stand upright, the jack stand 6 can be fixed to the main frame 4 only by opening and closing the hinge 32, and a tool or a clamp operation can be eliminated, thereby improving work efficiency. Can be.

The hydraulic pressure generator is not limited to a manual one, but may be an automatic one such as an electric one. The universal joints 16 and 18 are not limited to sliding bearings forming a pair of spherical surfaces, but may be any other strong and lightweight joints capable of swinging the jack means 7 and the like back and forth and left and right. Is also good.

[0029]

In summary, according to the present invention, the following excellent effects can be obtained.

(1) According to the first aspect of the invention, it is possible to prevent a force in the bending direction from being applied to the suspension beam and the jack means.

(2) According to the second aspect of the invention, the jack stand can be fixed to the main frame simply by opening and closing the hinge.

[Brief description of the drawings]

FIG. 1 is a front view of a conveyor belt lifting device according to a preferred embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is a view taken along the line IV-IV in FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a view taken along line VI-VI of FIG. 3;

FIG. 7 is a front view showing a conventional conveyor belt lifting device.

FIG. 8 is a front view showing a conventional conveyor belt lifting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor belt lifting apparatus 2 Return roller 3 Conveyor belt 4 Main frame 5 Belt conveyor 6 Jack stand 7 Jack means 8a Suspended beam 8b Suspended beam 9 Hook member 10 Holding plate 11 Stand arm part 16 Universal joint 18 Universal joint 30 Grasping part 31 Rod 32 hinge

Claims (2)

[Claims] 1. A conveyor belt lifting device for lifting a conveyor belt on a return path of a return roller provided below between U-shaped main frames and exchanging the return roller. A jack stand having a grip portion and having a stand arm portion standing up from the main frame, and jack means suspended swingably via a universal joint respectively on the left and right inner sides of the upper end of the stand arm portion of each jack stand. And a suspension beam connected to the rod end of the jack means via a universal joint and suspended below the conveyor belt. 2. A holding portion of the jack stand, a lower end of which engages a lower portion of the inside of the main frame and extends upward and outward from a lower surface of the main frame, and is hinged to an upper end of the hook member. 2. The conveyor belt lifting device according to claim 1, further comprising a holding plate seated on an upper surface of the main frame, wherein the stand arm portion is provided integrally on the holding plate so as to stand on the holding plate.