JP3729925B2 - Lifting mechanism and construction machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevating mechanism and a construction machine having the same.
[0002]
[Prior art]
A construction machine such as a terha (teruha crane) has a structure in which a transport device, a suspension device, or the like is supported by one or more legs that are erected substantially perpendicular to the ground. Some construction machines can change the height according to the change in the height of the building structure.
[0003]
Conventionally, as a mechanism for increasing the height of such a construction machine, a configuration in which the leg is extended above the leg or the installation position with respect to the leg of the transport device or the suspension device is moved upward is used. There was a thing.
[0004]
[Problems to be solved by the invention]
However, in the conventional mechanism, it is necessary to always perform the work of increasing the height of the construction machine at a high place, which is dangerous and complicated, and takes a long time. Furthermore, in order to raise a heavy conveyance apparatus, a traction apparatus, etc. safely and reliably, a large-scale apparatus is required and there exists a fault that the height which can be raised has a restriction | limiting.
[0005]
The present invention eliminates the drawbacks of the prior art, and an object of the present invention is to provide an elevating mechanism capable of ascending and descending safely and reliably with a simple structure and a construction machine including the elevating mechanism.
[0006]
[Means for Solving the Problems]
Such an object is achieved by the present inventions (1) to (7) below.
[0007]
(1) A lifting mechanism that constitutes a part of a leg of a construction machine and lifts the construction machine,
An elevator comprising a first jack and a second jack;
A plurality of unit columns that are connectable to each other and engageable with the first jack;
The elevating mechanism, wherein the unit column has an engaging portion with which the movable portion of the second jack is engaged.
[0008]
(2) A lifting mechanism that constitutes part of the leg of the construction machine and lifts the construction machine,
An elevator comprising a main body, and a first jack and a second jack installed in the main body;
An elevating mechanism comprising a plurality of unit columns that are connectable to each other and engageable with the first jack.
[0009]
(3) The elevating mechanism according to (1), wherein the engaging portion is detachably installed on the unit column.
[0010]
(4) The elevating mechanism according to (1), wherein the elevator has a main body, and the first jack and the second jack are installed on the main body.
[0011]
(5) The first jack is configured by a first cylinder which is installed coaxially with the leg portion and has a telescopic piston,
The second jack is configured in parallel with the first cylinder, and includes at least one second cylinder having a retractable piston.
The elevating mechanism according to any one of (1) to (4), wherein a tip of a piston of the first cylinder is configured to be connectable to the unit column.
[0012]
(6) In the above (1) to (5), the elevator is installed in the middle of the leg portion and configured to raise the construction machine by adding the unit column to the lower portion of the first jack. The raising / lowering mechanism in any one.
[0013]
(7) A construction machine configured to support a transporting means for transported objects by at least one leg, wherein the leg includes the elevating mechanism according to any one of (1) to (6). Construction machinery.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a lifting mechanism and a construction machine having the same according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
[0016]
FIG. 1 is an overall side view showing an embodiment of a terha (construction machine) equipped with the lifting mechanism of the present invention, and FIGS. 2, 3 and 4 are a front view, a rear view and a plan view of the terha shown in FIG. 1, respectively. FIG. First, based on these drawings, the overall structure and operation of the Telha 10 that is the construction machine of the present invention will be described.
[0017]
The Telha 10 mainly includes a garter 11 installed horizontally, a club 12 moving along the longitudinal direction of the garter 11, a sheave 13 suspended from the club 12 via a wire 14, and a sheave 13 A bucket 15 suspended from a hook, a pair of front legs 16 and rear legs 17 that support these, a stay 18 that connects the upper end of the front legs 16 and each part of the garter 11, and the rear of the garter 11 The winch 19 is installed and pulleys 20, 21, 22, and 23 are included.
[0018]
Among these, the garter 11, the club 12, the sheave 13, the wire 14, the bucket 15, the winch 19, and the pulleys 20, 21, 22, and 23 constitute a conveyance means (conveyance mechanism) for a conveyance object to be described later.
[0019]
The wire 14 unwound from the winch 19 reaches the sheave 13 through a pulley 20 installed at the front end of the garter 11 and a pulley 21 installed in the club 12, and further through a pulley 22 installed in the club 12. 11 is returned to the rear end of 11 and reversed by pulley 23 and arranged so as to reciprocate twice.
[0020]
When the winch 19 is actuated and the wire 14 is wound up, the sheave 13 is raised, and when the wire 14 is wound out, the sheave 13 is lowered, and the bucket 15 is raised and lowered accordingly.
[0021]
The club 12 has four wheels and drive means (not shown) for rotationally driving them, and moves when the wheels roll (rotate drive) on a rail installed along the longitudinal direction of the garter 11. To do.
[0022]
The bucket 15 stores and conveys, for example, cement, concrete, earth and sand, etc., and is a bottom open bucket whose bottom can be opened and closed. When the bucket 15 comes to a predetermined position (conveyed material input position) between the front leg portion 16 and the rear leg portion 17, the bottom portion is automatically moved by the operation of an automatic opening / closing mechanism (not shown) installed there. To be opened.
[0023]
The front leg portion 16 and the rear leg portion 17 are each erected in a substantially vertical direction with respect to the ground GL. The front leg portion 16 and the rear leg portion 17 have the lifting mechanism 1A of the present invention.
[0024]
The elevator 2 in the lifting mechanism 1 </ b> A is located in the middle of each leg 16, 17. Thereby, it is not always necessary to perform the addition work of the unit pillar 6 and the like which will be described later at a high place, and the safety is high.
[0025]
Moreover, the part above the elevator 2 of each leg part 16 and 17 is comprised by the column member 65 which has the part which used the plate-shaped member (plate) as the box structure.
[0026]
Next, the operation of the Telha 10 will be described.
[0027]
Conveyed items such as cement, concrete, and earth and sand conveyed by the cart (trolley) 30 are transferred to the bucket 15 at the load receiving position (below the front end of the garter 11) on the ground GL and are lifted.
[0028]
The wire 14 is wound up by the operation of the winch 19 to raise the sheave 13 and raise the bucket 15 suspended by the sheave 13.
[0029]
Next, the driving means mounted on the club 12 is operated to move the club 12 rearward (self-feed), and the bucket 15 comes to a predetermined position between the front leg 16 and the rear leg 17. Stop at the place.
[0030]
In a state where the dump truck 35 is positioned below the bucket 15, the bottom of the bucket 15 is opened by the automatic opening / closing mechanism, and the conveyed item in the bucket 15 is dropped and transferred to the loading platform of the dump truck 35. The dump truck 35 conveys this conveyed product to a predetermined location.
[0031]
Thereafter, the bucket 15 is returned to the original receiving position, and the above series of operations is repeated thereafter.
[0032]
Next, the configuration of the lifting mechanism 1A will be described. In addition, since the raising / lowering mechanism 1A is installed in all the front leg parts 16 and the back leg parts 17, and those structures are the same, only one leg part is demonstrated hereafter.
[0033]
5 to 10 are side views showing the operating state of the lifting mechanism 1A, respectively. As shown in these drawings, the lifting mechanism 1 </ b> A includes a lift 2 and a plurality of unit columns 6.
[0034]
The elevator 2 includes a main body 3, a first jack (main jack) 4, and a second jack (auxiliary jack) 5. The first jack 4 is installed at the center of the main body 3, and second jacks (auxiliary jacks) 5 are installed on the left and right sides thereof.
[0035]
Both the first jack 4 and the second jack 5 in the present embodiment are constituted by hydraulic jacks. That is, the first jack 4 includes a first cylinder 41 having a piston (movable part) 42 that expands and contracts by hydraulic drive, and the second jack 5 includes a piston (movable part) that extends and contracts by hydraulic drive. ) 52 and a pair of second cylinders 51.
[0036]
In this case, the 1st cylinder 41 is installed coaxially with the leg part 16 or 17 which installs it. The first cylinder 41 and the second cylinders 51 are installed in parallel, and the expansion and contraction directions of the pistons 42 and 52 are the same.
[0037]
At the upper end of the first cylinder 41, a flange 43 that is connected to the flange 66 at the lower end of the column member 65 is formed. Further, a flange 44 connected to the flange 61 at the end of the unit column 6 is formed at the tip (lower end) of the piston 42.
[0038]
As shown in FIG. 3, a hydraulic unit 7 for operating the first jack 4 and the second jack 5 is installed between the elevators 2, 2 of the rear leg 17. The hydraulic unit 7 has a hydraulic oil supply source and a predetermined hydraulic circuit. Each of the first cylinder 41 and the second cylinder 51 operates by supplying hydraulic oil from a hydraulic oil supply source of the hydraulic unit 7 via a predetermined hydraulic circuit.
[0039]
On the other hand, the unit column 6 is formed of a hollow cylindrical member that can be connected to each other, and has sufficient strength to support the Telha 10. Flange 61 for connecting with the adjacent unit pillar 6 is formed in the both ends of the unit pillar 6.
[0040]
The total length of the unit column 6 is shorter than the maximum stroke of the piston 42 and the maximum stroke of the piston 52. Thereby, a new unit column 6 can be easily inserted between the uppermost unit column 6 and the first jack 4 and added.
[0041]
Each unit column 6 is connected and fixed by joining those flanges 61 and bolting or welding them at a plurality of locations. Similarly, the flange 61 and the flange 44 and the flange 66 and the flange 43 are connected and fixed by bolting or welding at a plurality of locations.
[0042]
Accordingly, the outer diameters of the flanges 43, 44, 61, 66 are set to substantially equal values. Each flange 43, 44, 61, 66 is formed with a plurality of bolt holes when bolted.
[0043]
Next, the operation of the lifting mechanism 1A will be described.
[0044]
[1-A] First, the piston 42 of the first cylinder 41 and the piston 52 of the second cylinder 51 are contracted, respectively (see FIG. 5).
[0045]
At this time, the flange 66 of the column member 65 and the flange 43 of the first cylinder 41 are connected and fixed above the elevator 2, and the flange 61 of the uppermost unit column 6 and the piston 42 are below the elevator 2. The flange 44 is connected and fixed.
[0046]
[2-A] Next, the first cylinder 41 is operated to extend the piston 42 (see FIG. 6). This operation is performed on all the legs 16 and 17 simultaneously. Thereby, the part above the elevator 2 of the leg parts 16 and 17 is lifted, and the Telha 10 rises. The extension length of the piston 42 is longer than the entire length of the unit column 6. For example, when the total length of the unit column 6 is 1000 mm, the extension length of the piston 42 can be 1100 mm.
[0047]
[3-A] Before and after the extension of the pistons 42 is completed, both the second cylinders 51 are operated to extend the pistons 52 (see FIG. 7). The tip of the piston 52 abuts on the engagement surface (reference surface) S. In the case of the present embodiment, the engagement surface S is at a position higher than the ground GL.
[0048]
[4-A] When the extension of the piston 42 and the extension of the piston 52 are completed, the connection between the flange 44 and the flange 61 connected thereto is released, and the piston 42 is contracted while the extension state of the piston 52 is maintained. (See FIG. 8).
[0049]
[5-A] A new unit column 6 is inserted between the tip of the piston 42 and the uppermost unit column 6, and the uppermost unit column 6 and the flange 61 of the new unit column 6 are connected and fixed together. (See FIG. 9).
[0050]
[6-A] The piston 52 is contracted and the elevator 2 is lowered until the tip of the piston 42 comes into contact with the upper end of the newly added unit column 6. Next, the flange 44 and the flange 61 of the new unit column 6 are connected and fixed.
[0051]
[7-A] The piston 52 is contracted and separated from the engagement surface S (see FIG. 10).
[0052]
Through the steps as described above, one unit column 6 is added to each leg portion 16 and 17 at a midway position thereof, and the Telha 10 is raised by a height corresponding to the entire length of one unit column 6.
[0053]
As a result of depositing concrete or the like on the engaging surface S, when the engaging surface S rises to S ′ (indicated by a one-dot chain line in FIG. 10), the above steps [1-A] to [7-A] are performed again. By repeating this, the Telha 10 can be set to a desired height. In addition, the connected unit pillar 6 is embed | buried under the engagement surface S, and becomes an aggregate (refer FIG. 1).
[0054]
In the above description, the ascending operation has been described. However, when the Telha 10 is lowered by the lifting mechanism 1A, the above steps may be performed in reverse.
[0055]
In the elevating mechanism 1A as described above, the above-described operations such as adding the unit columns 6 can be performed in the vicinity of the engagement surface S, not in the aerial operation at a high place, so that the operability and workability are excellent. At the same time, work safety is high. Moreover, even the heavy Telha 10 can be raised and lowered safely and reliably.
[0056]
Moreover, in the raising / lowering mechanism 1A, since the engaging surface S is raised, the above effect is exhibited at any height without being restricted by the raised height. Because of this, it is also suitable for the construction of high-rise buildings.
[0057]
11 to 17 are side views showing other embodiments of the lifting mechanism of the present invention, respectively, and FIG. 18 is a sectional view taken along line AA in FIG. Hereinafter, although this Example is described, the description is abbreviate | omitted about the matter similar to the Example shown in the said FIGS.
[0058]
The lifting mechanism 1 </ b> B shown in FIGS. 11 to 17 is composed of a lift 2 similar to the above and a plurality of unit columns 6.
[0059]
The unit column 6 is detachably installed with brackets 8 on both sides thereof as engaging portions with which the tip of the piston 52 of the second cylinder 51 is engaged. As shown in FIG. 18, the bracket 8 includes plate members 81 and 82 that are fixed or integrated in a T shape, and a mounting portion 83 having a bolt hole 84.
[0060]
On the other hand, bracket support portions 62 are formed on both sides of the unit column 6, and the bracket 8 is supported and fixed to the unit column 6 by bolting the mounting portion 83 of the bracket 8 to the bracket support portion 62. To do.
[0061]
Next, the operation of the lifting mechanism 1B will be described.
[0062]
[1-B] First, the piston 42 of the first cylinder 41 and the piston 52 of the second cylinder 51 are contracted, respectively (see FIG. 11).
[0063]
At this time, the flange 66 of the column member 65 and the flange 43 of the first cylinder 41 are connected and fixed above the elevator 2, and the flange 61 of the uppermost unit column 6 and the piston 42 are below the elevator 2. The flange 44 is connected and fixed. In addition, brackets 8 are fixed to both bracket support portions 62 of the uppermost unit column 6 by bolting.
[0064]
[2-B] Next, the first cylinder 41 is operated to extend the piston 42 (see FIG. 12). This operation is performed on all the legs 16 and 17 simultaneously. Thereby, the part above the elevator 2 of the leg parts 16 and 17 is lifted, and the Telha 10 rises. The extension length of the piston 42 is longer than the entire length of the unit column 6.
[0065]
[3-B] Before and after the extension of the pistons 42 is completed, both the second cylinders 51 are operated to extend the pistons 52 (see FIG. 13). The tip of the piston 52 abuts on the upper surface of the plate 81 of the bracket 8 installed on the uppermost unit column 6.
[0066]
[4-B] When the extension of the piston 42 and the extension of the piston 52 are completed, the connection between the flange 44 and the flange 61 connected thereto is released, and the piston 42 is contracted while the extension state of the piston 52 is maintained. (See FIG. 14).
[0067]
[5-B] A new unit column 6 is inserted between the tip of the piston 42 and the uppermost unit column 6, and the uppermost unit column 6 with bracket and the flange 61 of the new unit column 6 are connected to each other. And fix (see FIG. 15).
[0068]
[6-B] The piston 52 is contracted and the elevator 2 is lowered until the tip of the piston 42 comes into contact with the upper end of the newly added unit column 6. Next, the flange 4 and the flange 61 of the new unit column 6 are connected and fixed.
[0069]
[7-B] The piston 52 is contracted and separated from the bracket 8 (see FIG. 16).
[0070]
[8-B] The bracket 8 is removed from the unit column 6 and fixed to the newly added unit column 6 by bolting (see FIG. 17).
[0071]
Through the steps as described above, one unit column 6 is added to each leg portion 16 and 17 at a midway position thereof, and the Telha 10 is raised by a height corresponding to the entire length of one unit column 6.
[0072]
By repeating the steps [1-B] to [8-B] again, the Telha 10 can be set to a desired height.
[0073]
In the above, the ascending operation has been described. However, when the Telcha 10 is lowered by the elevating mechanism 1B, the above steps may be performed in reverse.
[0074]
In the elevating mechanism 1B as described above, by providing the unit column 6 with the bracket (engagement portion) 8 with which the piston 52 of the second jack 5 is engaged, the presence / absence and level of the engagement surface (reference surface) S Regardless of whether it is possible to move up and down. Moreover, since the bracket 8 is detachable with respect to the unit column 6, it contributes to the simplification and miniaturization of the structure of the elevator 2 and the unit column 6. It is also suitable for installation in places with poor scaffolding or narrow places.
[0075]
As mentioned above, although the raising / lowering mechanism of this invention and the Telha (construction machine) provided with this were demonstrated based on each Example of illustration, this invention is not limited to these.
[0076]
For example, each cylinder in the first and second jacks of the elevator may be operated by water pressure or air pressure. The first and second jacks are not limited to those driven by hydraulic pressure or the like, but may be screw jacks, rack drive jacks, or the like.
[0077]
Further, the shape of the unit column and the shape and structure of the bracket (engagement portion) are not limited to those shown in the drawing. Plural types of unit pillars having different lengths can be prepared and used by appropriately selecting from these.
[0078]
In addition, the lifting mechanism of the present invention is not limited to the one shown in the figure, but can be applied to all other construction machines such as jib cranes, construction lifts, elevators, dredging machines, civil engineering machines, and transport machines. be able to.
[0079]
Moreover, the raising / lowering mechanism of this invention should just be a thing which can raise a construction machine etc. at least, and may not make it fall.
[0080]
【The invention's effect】
As described above, according to the elevating mechanism and the construction machine of the present invention, the elevating mechanism and the construction machine can be raised and lowered safely and reliably with a simple structure. In particular, it is excellent in workability, can be easily moved up and down, and has high work safety.
[Brief description of the drawings]
FIG. 1 is an overall side view showing an embodiment of a Telha equipped with a lifting mechanism according to the present invention.
FIG. 2 is a front view of Teruha shown in FIG.
FIG. 3 is a rear view of the Telha shown in FIG. 1;
4 is a plan view of Teruha shown in FIG. 1. FIG.
FIG. 5 is a side view showing an operating state of the lifting mechanism of the present invention.
FIG. 6 is a side view showing the operating state of the lifting mechanism of the present invention.
FIG. 7 is a side view showing an operating state of the lifting mechanism of the present invention.
FIG. 8 is a side view showing an operating state of the lifting mechanism of the present invention.
FIG. 9 is a side view showing the operating state of the lifting mechanism of the present invention.
FIG. 10 is a side view showing the operating state of the lifting mechanism of the present invention.
FIG. 11 is a side view showing the operating state of the lifting mechanism of the present invention.
FIG. 12 is a side view showing the operating state of the lifting mechanism of the present invention.
FIG. 13 is a side view showing the operating state of the lifting mechanism of the present invention.
FIG. 14 is a side view showing the operating state of the lifting mechanism of the present invention.
FIG. 15 is a side view showing an operating state of the lifting mechanism of the present invention.
FIG. 16 is a side view showing the operating state of the lifting mechanism of the present invention.
FIG. 17 is a side view showing the operating state of the lifting mechanism of the present invention.
18 is a cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
1A, 1B Elevating mechanism 2 Elevator 3 Main body 4 First jack 41 First cylinder 42 Piston 43, 44 Flange 5 Second jack 51 Second cylinder 52 Piston 6 Unit column 61 Flange 62 Bracket support portion 65 Column member 66 Flange 7 Hydraulic unit 8 Bracket 81, 82 Plate 83 Mounting part 84 Bolt hole 10 Telha 11 Garter 12 Club 13 Sheave 14 Wire 15 Bucket 16, 17 Leg 18 Stay 19 Winch 20-23 Pulley 30 Car 35 Dump truck GL Ground S Joint surface (reference surface)

Claims (7)

A lifting mechanism that constitutes part of the leg of the construction machine and lifts the construction machine,
An elevator comprising a first jack and a second jack;
A plurality of unit columns that are connectable to each other and engageable with the first jack;
The elevating mechanism, wherein the unit column has an engaging portion with which the movable portion of the second jack is engaged. A lifting mechanism that constitutes part of the leg of the construction machine and lifts the construction machine,
An elevator comprising a main body, and a first jack and a second jack installed in the main body;
An elevating mechanism comprising a plurality of unit columns that are connectable to each other and engageable with the first jack.   The lifting mechanism according to claim 1, wherein the engaging portion is detachably installed on the unit column.   The elevating mechanism according to claim 1, wherein the elevator has a main body, and the first jack and the second jack are installed on the main body. The first jack is configured by a first cylinder that is installed coaxially with the leg portion and has a telescopic piston,
The second jack is configured in parallel with the first cylinder, and includes at least one second cylinder having a retractable piston.
The lifting mechanism according to any one of claims 1 to 4, wherein a tip end of a piston of the first cylinder is configured to be connectable to the unit column.   6. The elevator according to claim 1, wherein the elevator is installed in the middle of the leg portion, and is configured to raise the construction machine by adding the unit column to a lower portion of the first jack. mechanism.   7. A construction machine in which a conveying means for conveying a product is supported by at least one leg portion, wherein the leg portion has the lifting mechanism according to any one of claims 1 to 6.

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