KR20120122771A - Lifer using oil pressure cylinder and method thereof - Google Patents

Lifer using oil pressure cylinder and method thereof Download PDF

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Publication number
KR20120122771A
KR20120122771A KR1020110041123A KR20110041123A KR20120122771A KR 20120122771 A KR20120122771 A KR 20120122771A KR 1020110041123 A KR1020110041123 A KR 1020110041123A KR 20110041123 A KR20110041123 A KR 20110041123A KR 20120122771 A KR20120122771 A KR 20120122771A
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KR
South Korea
Prior art keywords
hydraulic cylinder
support block
lifting
piston rod
lifting device
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Application number
KR1020110041123A
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Korean (ko)
Inventor
고엄식
Original Assignee
(주)유경기술단
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Priority to KR1020110041123A priority Critical patent/KR20120122771A/en
Publication of KR20120122771A publication Critical patent/KR20120122771A/en

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    • 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/36—Load-engaging elements
    • 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
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
    • B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)

Abstract

PURPOSE: A lifting device using a hydraulic cylinder and a method thereof are provided to safely lift a lifted object without applying heavy load to hydraulic cylinders by having short withdrawal distance of piston rods. CONSTITUTION: A lifting device using a hydraulic cylinder comprises first hydraulic cylinders(110), second hydraulic cylinders(120), and support blocks(130). The first and second hydraulic cylinders are vertically installed on the floor to support the underside of a lifted object(A). The first hydraulic cylinders repeat a lifting motion at a predetermined height. The second hydraulic cylinders alternatively repeat the lifting motion same as the first hydraulic cylinders. The support blocks are fitted in empty spaces between the hydraulic cylinders and the underside of the lifted object to support the lifted object.

Description

Lifting device and method using hydraulic cylinder {Lifer using oil pressure cylinder and method

The present invention relates to a lifting device and method for lifting a heavy structure to a height by using a hydraulic cylinder, the configuration is simple, and the hydraulic cylinder that allows the structure to be safely lifted to the height without burdening the hydraulic cylinder It relates to a lifting device and method used.

In general, in the field of civil engineering and construction, the lifting of heavy structures to high places is frequently performed. Such lifting devices include hydraulic cranes, hydraulic hoists, and hydraulic elevators.

However, these lifting devices must be enlarged in proportion to the weight of the structure to be lifted and require a large work space. It is very difficult to use. Therefore, in such a case, a special lifting device is required.

As an example, there is a lifting device using a hydraulic jack and a jack rod. 1 and 2, in the case of constructing a tunnel or underground structure, the jack rod 1 is installed vertically at the bottom of the excavation part, and at the same time, the hydraulic jack 3 and the hydraulic jack 3 are provided on the elevating object 2. By installing a yoke member 4 for supporting the above, the hydraulic jack 3 and the jack rod 1 cooperate with each other to sue the heavy lifting objects 2 such as steel structures for the installation of a work temporary or formwork. It is to be elevated to.

However, the lifting device using the hydraulic jack 3 and the jack rod 1 has an advantage in that a large lifting device or a large work space is not required. However, the configuration of the device is complicated and these complicated devices are lifted. The yoke member 4 and the hydraulic jack 3 must be installed in advance.

Meanwhile, as shown in FIGS. 3 and 4, the hydraulic cylinders 10 are installed on the floor, the lifting object 20 is placed on the hydraulic cylinders 10, and the hydraulic cylinders 10 are operated at the same time. The method of pushing up and lifting the object 20 can also be considered.

However, the elevating method is capable of elevating only the withdrawal distance of the piston rod instead of the advantage that the configuration is simple and is not restricted by the installation location, and in particular, as the withdrawal distance of the piston rod increases, the durability of the piston rod is reduced, and thus the hydraulic cylinder (10) Since there is a risk of overturning, there is a problem that the safety is greatly reduced in raising the high-elevation object 20 to the height.

The present invention has been made to solve the above problems, a simple configuration and a lifting device and method using a hydraulic cylinder that can safely lift the lifting object to the height of the hydraulic cylinder without difficulty without requiring a large working space. The purpose is to provide.

In order to achieve the above object, the lifting device using the hydraulic cylinder of the present invention is installed perpendicular to the floor to support the bottom of the lifting object, a plurality of first hydraulic cylinder to repeat the ascending and descending operation to a certain height; A plurality of second hydraulic cylinders installed perpendicular to a floor to support the bottom of the elevating object and alternately repeating the same elevating operation as the first hydraulic cylinder; And a support block inserted into the empty space of the hydraulic cylinder in the lower surface and the lowering operation state of the elevating object to support the elevating object.

And the present invention comprises the steps of installing the first hydraulic cylinder and the second hydraulic cylinder on the floor alternately; Placing a lifting object on the first hydraulic cylinder and the second hydraulic cylinder; Lifting the lifting object while the piston rod of the first hydraulic cylinder is withdrawn; Fitting a support block into an empty space between the lifting object and the second hydraulic cylinder; Lowering the piston rod of the drawn first hydraulic cylinder; It characterized in that it comprises a step of fitting the support block into the empty space between the lifting object and the first hydraulic cylinder.

According to the present invention configured as described above, the first hydraulic cylinder and the second cylinder for supporting the elevating object are inserted into the empty space generated while alternately repeatedly performing the ascending and descending motions to a predetermined height. Since it does not require a large working space, the piston rod has a short withdrawal distance, so that the hydraulic cylinder does not follow the lifting force of the aerial lifting object.

1 and 2 is a state diagram showing an example of a conventional lifting device.
3 and 4 is a state diagram showing an example of the lifting device using a conventional hydraulic cylinder.
5 is a state of use of the lifting device using a hydraulic cylinder according to the present invention.
Figure 6 is an exploded view of the lifting device using a hydraulic cylinder according to the present invention.
Figure 7 is an exploded view according to another embodiment of the lifting device using a hydraulic cylinder according to the present invention.
8 and 9 are exploded views according to another embodiment of the lifting device using the hydraulic cylinder according to the present invention, respectively.
10 to 17 are diagrams each showing a method of using a lifting device using a hydraulic cylinder according to the present invention in order.

The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It must be interpreted in terms of meaning and concept.

As shown in FIGS. 5 to 7, the present invention includes a plurality of first hydraulic cylinders 110 installed vertically on the floor to support the bottom of the elevating object A and repeating the ascending and descending operations at a predetermined height. And a plurality of second hydraulic cylinders 120 alternately repeating the same lifting operation as the first hydraulic cylinder 110 and an empty space of a hydraulic cylinder in a lowering state and a lowering operation state of the lifting object A. It consists of a support block 130 for supporting the object (A).

The first hydraulic cylinder 110 should be installed in advance between the elevating object (A) and the floor, and must be firmly fixed to the floor so as not to flow. If the installation space cannot be secured, the groove may be dug into the bottom surface and placed in the groove, and then firmly fixed to the bottom of the groove.

In addition, if the floor is a concrete floor surface completed by placing concrete on the excavation bottom surface, put a separate support structure having a certain height on the excavation bottom surface and cast concrete on the excavation bottom surface to expose the top surface of the support structure By completing the concrete floor surface embedded with the supporting structure, the hydraulic cylinder may be fastened to the upper end of the supporting structure and installed.

The first hydraulic cylinder 110 is a conventional hydraulic cylinder for lifting, and has a cylinder housing 111 fixed to the bottom, and a piston rod 112 drawn out vertically from the upper end of the cylinder housing 111. The first hydraulic cylinder 110 configured as described above is operated such that the piston rod 112 is repeatedly raised and lowered at a predetermined height regardless of the lifting height of the lifting target A. FIG.

The second hydraulic cylinder 120 is a conventional hydraulic cylinder, made of the same configuration as the above-described first hydraulic cylinder 110 and disposed between the first hydraulic cylinder (110). In addition, the second hydraulic cylinder 120 is operated such that the piston rod 112 is repeatedly raised and lowered at a predetermined height regardless of the lifting height of the lifting target A in the same manner as the first hydraulic cylinder 110. However, the second hydraulic cylinder 120 differs only in that the lifting operation is alternately performed with the first hydraulic cylinder 110.

The support block 130 is inserted into an empty space formed between the lifting object A and the piston rod of the hydraulic cylinder in the lowering operation state to support the lifting object A. Therefore, the support block 130 is stacked stepwise as the lifting object A rises.

According to the present invention, the support block 130 may be stacked up and down through fitting, and the support block 130 may be stacked up and down through spiral fastening.

As shown in FIG. 6, when the support block 130 is stacked up and down through fitting, the support block 130 has a horizontal upper portion 131 having a protrusion 131a formed on an upper surface thereof, and a lower surface thereof. It may be made of a body having a horizontal lower portion 132 having a groove portion 132a corresponding to the protrusion 131a and a vertical portion 133 connecting the horizontal upper portion 131 and the horizontal lower portion 132. . In this case, fitting protrusions 113 for fitting engagement with the support block 130 are formed at the upper ends of the piston rods 112 of the first hydraulic cylinder 110 and the second hydraulic cylinder 120.

On the other hand, at the tip of the groove 132a of the horizontal lower portion 132, the protrusion formed on the fitting protrusion 113 of the first and second hydraulic cylinders 110 and 120 or the upper horizontal portion 131 of the support block 130 located below. It is preferable that the tapered portion 132c is formed to facilitate the coupling with the 131a.

Although not shown, the support member 130 may be more stably coupled by penetrating the pin member to the protrusion 131a and the groove 132a, which are the connection portions of the support block 130.

As shown in FIG. 7, when the support block 130 is stacked up and down through the spiral fastening, the support block 130 has a horizontal upper portion 131 having a screw portion 131b formed at an upper end thereof, and a lower end surface thereof. It may be composed of a body having a horizontal lower portion 132 is formed with a screw groove portion 132b corresponding to the screw portion 131b, and a vertical portion 133 connecting the horizontal upper portion 131 and the horizontal lower portion 132. have. In this case, the upper end of the piston rod 112 of the first hydraulic cylinder 110 and the second hydraulic cylinder 120 is formed with a thread portion 114 corresponding to the screw groove portion 132b of the support block 130.

On the other hand, the threaded portion (114) formed on the upper end of the piston rod 112 of the first and second hydraulic cylinders (110, 120) or the threaded portion of the other support block 130 at the front end of the screw groove (132b) of the horizontal lower portion (132) It is preferable that the tapered portion 132c is formed to facilitate coupling with the 132b.

In addition, the support blocks 130 may further include an outer shell 134 surrounding the side of the body in common. The envelope 134 facilitates handling of the support block 130. To this end, the outer shell 134 may be provided with a handle 135 or a traction ring. The handle 135 is useful when moving the support block or rotating the support block 130 for helical coupling.

In addition, it is preferable that the inner side of the outer shell 134 is further provided with a vertical rib for strength reinforcement. The vertical ribs 136 are formed so that both ends are in close contact with the bottom surface of the horizontal upper portion 131 and the upper surface of the horizontal lower portion 132, respectively, and the horizontal upper portion 131 of the body is bent due to the vertical load applied from the upper portion. 134 prevents deformation.

As shown in FIG. 8, as another embodiment of the present invention, the support block 130 is fitted to an upper end of the vertical pipe 137 and the vertical pipe 137 of another support block 130 stacked below. It may be composed of an expansion coupling portion 138 extending from the lower end of the vertical pipe 137. In this case, the fitting protrusion 113 corresponding to the expansion coupling part 138 is formed at the upper end of the piston rod 112 of the first hydraulic cylinder 110 and the second hydraulic cylinder 120.

Although not shown, the support block 130 is connected to the other support block 130 stacked on the bottom or the piston rod 112 of the first hydraulic cylinder 110 and the second hydraulic cylinder 120 through pin coupling. It is desirable to. In this case, the fitting protrusion 138 of the expansion coupling portion 138 of the support block 130, the upper end of the vertical pipe 137, and the piston rod of the first hydraulic cylinder 110 and the second hydraulic cylinder 120 ( Each through hole 113 is formed with a pin coupling.

In addition, as shown in Figure 9, when the support block 130 is stacked up and down through the spiral fastening, the support block 130 is a vertical tube 137 having a screw thread (137a) formed on the upper outer peripheral surface And an extension pipe 138 extending from a lower end of the vertical pipe 137 so as to fit on an upper end of the vertical pipe 137 of the other support block 130 stacked below, and an upper end of the vertical pipe 137. It may be made of a screw groove portion 138a formed inside the expansion pipe coupling portion 138 to correspond to the screw thread 137a formed on the outer circumferential surface. In this case, a screw portion 114 corresponding to the screw groove portion 138a is formed at an upper end of the piston rod 112 of the first hydraulic cylinder 110 and the second hydraulic cylinder 120.

On the other hand, a support protrusion 137b is formed on the outer peripheral surface of the upper end of the vertical pipe 137 to support the lower end of the expansion pipe coupling part 138.

The lifting device of the present invention configured as described above can be easily lifted and lifted to a high weight lifting object (A) by the following method.

As shown in FIG. 10, the first hydraulic cylinder 110 and the second hydraulic cylinder 120 are alternately installed on the bottom, and the piston rod of the first hydraulic cylinder 110 and the second hydraulic cylinder 120 is provided. (112) Put the lifting object (A) on the top.

As shown in FIG. 11, when the elevating object A is stably placed on the upper portions of the first and second hydraulic cylinders 110 and 120, only the first hydraulic cylinder 110 is lifted up. When the first hydraulic cylinder 110 is lifted up, the piston rod 112 of the first hydraulic cylinder 110 is pulled out vertically from the cylinder housing 111 by a predetermined length. In this process, the lifting object A is the piston rod ( 112 is raised by the length drawn.

As a result, an empty space is created between the elevating object A and the second hydraulic cylinder 120, and the support block 130 is fitted into the space. At this time, the support block 130 has a groove portion 132a formed at the bottom thereof is fitted to the fitting protrusion 113 formed on the top of the piston rod 112 of the second hydraulic cylinder 120 to be stably coupled. The first hydraulic cylinder 110 allows the piston rod 112 to be raised higher than the height of the support block 130 so that the support block 130 may be coupled to the piston rod 112 of the second hydraulic cylinder 120. It is desirable to ensure that a working space is secured.

As shown in FIG. 12, when both of the support blocks 130 are coupled to the upper ends of the piston rods 112 of the second hydraulic cylinder 120, the first hydraulic cylinder 110 performs a lowering operation. As a result, the piston rod 112 of the first hydraulic cylinder 110 that has been raised is returned to its original position.

As shown in FIG. 13, when the piston rod 112 of the first hydraulic cylinder 110 is completely lowered, an empty space is created between the lifting object A and the first hydraulic cylinder 110, and FIG. 14. As shown in the drawing, the support blocks 130 are fitted into the empty space. The support blocks 130 have a groove portion 132a formed at a lower end thereof and is fitted to the fitting protrusion 113 formed at an upper end of the piston rod 112 of the first hydraulic cylinder 110 to be stably coupled. At this time, the second hydraulic cylinder 120 slightly raises the piston rod 112 so that the working space can be secured when the support block 130 is coupled to the piston rod 112 of the first hydraulic cylinder 110. It is desirable to.

As shown in FIG. 15, when the support block 130 is coupled to the upper end of the piston rod 112 of the first hydraulic cylinder 110, the second hydraulic cylinder 120 performs an ascending operation. As a result, the elevating object (A) is raised one step further, and an empty space is created between the support block 130 and the elevating object (A) coupled to the upper end of the first hydraulic cylinder (110). As shown in the drawing, new support blocks 130 are fitted into the empty space. Each of the new support blocks 130 is stacked on top of the existing support block 130. In this process, the protrusion 131a formed at the horizontal upper portion 131 of the existing support block 130 is replaced by the new support block 130. It is fitted into the groove 132a formed in the horizontal lower portion 132 of the) is stably coupled. At this time, the second hydraulic cylinder 120 allows the piston rod 112 to be raised higher than the height of the new support block 130 so that the new support block 130 is coupled to the upper end of the first hydraulic cylinder 110. When combined with the support block 130 it is desirable to ensure a working space.

As such, when the installation of the new support block 130 is completed, as shown in FIG. 17, the second hydraulic cylinder 120 returns to its original position while performing the lowering operation. As a result, an empty space is formed between the support block 130 coupled to the upper end of the second hydraulic cylinder 120 and the lifting object A, and as shown in FIG. 130 are fitted and combined. In this case, the first hydraulic cylinder 110 is slightly raised by the piston rod 112 so that the working space is secured when the new support block 130 is coupled with the support block coupled to the upper end of the second hydraulic cylinder 120. It is desirable to be able to.

 It is possible to raise the lifting object (A) to the desired height while repeating this series of processes.

On the other hand, as shown in FIG. 7, the screw portion 131b is formed in the horizontal upper portion 131 of the support block 130 and the screw groove portion 132b is formed in the horizontal lower portion 132, as shown in FIG. 9. Likewise, when the screw portion 137a is formed on the upper outer peripheral surface of the vertical pipe 137 of the support block 130 and the screw groove portion 138a is formed on the expansion coupling portion 138, the support block 130 is more firmly formed through helical coupling. ) Can be stacked. At this time, the worker rotates the support block 130 located at the upper side by using the handle 135 so that the worker can be coupled to the support block 130 at the lower end of the spiral.

Although not shown, since the lifting device using the hydraulic cylinder of the present invention is installed and operated independently, when the first hydraulic cylinder 110 and the second hydraulic cylinder 120 are installed on the bottom of the movable means such as a vehicle. , The lifting object A can be lifted and moved at the same time. Therefore, in the case of a ceiling construction of a tunnel where the movement of the lifting object A is essentially required, the lifting object A can be used as a temporary workbench or a ceiling formwork so that construction work related to the ceiling can be performed very quickly and simply. .

In addition, in the present invention, the support block 130 is first coupled to each of the hydraulic cylinders 110 and 120 so that the empty space into which the support block 130 is fitted is always formed only on the upper portions of the first hydraulic cylinder 110 and the second hydraulic cylinder 120. 130 may be fixed to the lifting object A and a new support block 130 may be stacked below. At this time, it is obvious that the upper support block 130 and the new support block 130 at the bottom should be firmly fastened so as not to be separated. However, this method is the lifting object (A) and the first and second hydraulic cylinders (120, 130) side as the number of the lifting blocks (A) hanging on the lifting object (A) increases as the lifting height of the lifting object (A) increases This is not a preferable method given the enormous load on the.

As described above, preferred embodiments of the present invention are described above with reference to the drawings, but the present invention is not limited to the above-described embodiments, and those skilled in the art may modify the present invention without departing from the spirit of the present invention. Possible, such modifications will fall within the scope of the invention.

110 ... 1st hydraulic cylinder 120 ... 2nd hydraulic cylinder
112 Piston Road 113 ...
114.Thread 132b, 138a ... Thread groove
130 ... support block 131 ... horizontal top
131a ... dol 131b, 137a ... thread
132 ... horizontal bottom 132a ... groove
133 Vertical Section 134 Jacket
136 Vertical ribs 137 Vertical piping
Expansion joint A ... Elevation object

Claims (10)

A plurality of first hydraulic cylinders installed perpendicular to the floor to support the bottom of the elevating object and repeating the ascending and descending operations at a predetermined height;
A plurality of second hydraulic cylinders installed perpendicular to a floor to support the bottom of the elevating object and alternately repeating the same elevating operation as the first hydraulic cylinder; And
A lifting device using a hydraulic cylinder, characterized in that it comprises a support block for supporting the lifting object is inserted into the empty space of the hydraulic cylinder in the lower surface and the lowering operation state of the lifting object. The method of claim 1,
Lifting device using a hydraulic cylinder, characterized in that the support blocks are stacked up and down through the fitting coupling. The method of claim 2,
The support block
It consists of a body consisting of a horizontal upper portion formed with a protrusion on the upper surface, a horizontal lower portion formed with a groove corresponding to the protrusion on the lower surface, and a vertical portion connecting the horizontal upper portion and the horizontal lower portion,
Lifting device using a hydraulic cylinder, characterized in that the fitting projection corresponding to the screw groove portion is formed on the upper end of the piston rod of the first hydraulic cylinder and the second hydraulic cylinder. The method of claim 1,
Lifting device using a hydraulic cylinder, characterized in that the support blocks are stacked up and down through the screw fastening. The method of claim 4, wherein
The support block
It consists of a body consisting of a horizontal upper portion formed with a screw portion on the upper surface, a horizontal lower portion formed with a screw groove corresponding to the screw portion on the lower surface, and a vertical portion connecting the horizontal upper portion and the horizontal lower portion,
Lifting device using a hydraulic cylinder, characterized in that the threaded portion corresponding to the screw groove portion is formed on the upper end of the piston rod of the first hydraulic cylinder and the second hydraulic cylinder. The method according to claim 3 or 5,
The support block further includes an outer shell surrounding the side of the body,
Lifting device using a hydraulic cylinder, characterized in that the inner side of the outer shell is formed with a strength reinforcement vertical ribs in which both ends are in close contact with the lower surface and the upper horizontal lower surface of the horizontal upper portion, respectively. The method of claim 2,
The support block is composed of a vertical pipe and an expansion joint extending from a lower end of the vertical pipe so as to fit on the upper end of the vertical pipe of the other support block stacked below,
Lifting device using a hydraulic cylinder, characterized in that the fitting projection corresponding to the expansion coupling portion is formed on the upper end of the piston rod of the first hydraulic cylinder and the second hydraulic cylinder. The method of claim 4, wherein
The support block includes a vertical tube formed with a screw thread on the upper outer circumferential surface, an expansion coupling portion extending from a lower end of the vertical tube to fit on an upper end of the vertical tube of another supporting block stacked below, and formed on the upper outer circumferential surface of the vertical tube. It consists of a screw groove formed on the inside of the expansion pipe to correspond to the screw thread,
Lifting device using a hydraulic cylinder, characterized in that the threaded portion corresponding to the screw groove portion is formed on the upper end of the piston rod of the first hydraulic cylinder and the second hydraulic cylinder. Alternately installing a first hydraulic cylinder and a second hydraulic cylinder on the floor;
Placing a lifting object on the first hydraulic cylinder and the second hydraulic cylinder;
Lifting the lifting object while the piston rod of the first hydraulic cylinder is withdrawn;
Fitting a support block into an empty space between the lifting object and the second hydraulic cylinder;
Lowering the piston rod of the drawn first hydraulic cylinder;
Lifting method using a hydraulic cylinder, characterized in that it comprises a step of fitting the support block into the empty space between the lifting object and the first hydraulic cylinder. The method of claim 9,
After the step of inserting the support block into the empty space between the lifting object and the first hydraulic cylinder,
A step of elevating the elevating object which is raised as the piston rod of the second hydraulic cylinder is withdrawn;
Fitting a new support block into an empty space between a lifting object and a support block of the first hydraulic cylinder;
Lowering the piston rod of the extracted second hydraulic cylinder; And
And a new support block is fitted into an empty space between the lifting object and the support block of the second hydraulic cylinder.
KR1020110041123A 2011-04-29 2011-04-29 Lifer using oil pressure cylinder and method thereof KR20120122771A (en)

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Application Number Priority Date Filing Date Title
KR1020110041123A KR20120122771A (en) 2011-04-29 2011-04-29 Lifer using oil pressure cylinder and method thereof

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Application Number Priority Date Filing Date Title
KR1020110041123A KR20120122771A (en) 2011-04-29 2011-04-29 Lifer using oil pressure cylinder and method thereof

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KR20120122771A true KR20120122771A (en) 2012-11-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104249981A (en) * 2014-09-15 2014-12-31 太仓市金达机械厂 Beam levelness adjusting device
KR20170021146A (en) * 2015-08-17 2017-02-27 대우조선해양 주식회사 Jacking system and method for assembly upward adjustment
CN111660366A (en) * 2020-05-28 2020-09-15 许子涵 Agarose gel plate punching structure
CN112009346A (en) * 2020-09-10 2020-12-01 中海外交通建设有限公司 Beam guiding machine with liftable multifunctional trolley

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104249981A (en) * 2014-09-15 2014-12-31 太仓市金达机械厂 Beam levelness adjusting device
CN104249981B (en) * 2014-09-15 2016-12-07 太仓市金达机械厂 Crossbeam level(l)ing device
KR20170021146A (en) * 2015-08-17 2017-02-27 대우조선해양 주식회사 Jacking system and method for assembly upward adjustment
CN111660366A (en) * 2020-05-28 2020-09-15 许子涵 Agarose gel plate punching structure
CN111660366B (en) * 2020-05-28 2023-08-15 许子涵 Agarose gel plate punching structure
CN112009346A (en) * 2020-09-10 2020-12-01 中海外交通建设有限公司 Beam guiding machine with liftable multifunctional trolley
CN112009346B (en) * 2020-09-10 2021-11-02 中海外交通建设有限公司 Beam guiding machine with liftable multifunctional trolley

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