KR20090015222A - Apparatus for transferring high load structure - Google Patents

Abstract

A high-load structure transfer method is provided to improve efficiency remarkably when constructing a civil structure or a building structure or manufacturing an equipment structure by preventing a structure from not being transferred to the regular position by turning the direction of a structure while transferring a structure. A high-load structure transfer method comprises a rail arrangement process of arranging rails(30) in two or more rows to be parallel to each other on a conveying path of a structure(10), a transfer apparatus installation process of installing a transfer apparatus to each rail, a bogie installation process of installing a plurality of bogies(20) placing and supporting each structure on two or more rails, a first transfer process of moving a second clamp(150) forward and pushing a structure to move, a second transfer process of moving a first clamp(110) forward, and a repeated transfer process of repeating the first transfer process and the second transfer process to transfer the structure to the wanted location.

Description

Heavy Load Structure Transport Method {APPARATUS FOR TRANSFERRING HIGH LOAD STRUCTURE}

The present invention relates to a high load structure transfer method, and more particularly, a high load structure that can increase efficiency during construction or fabrication of the structure by preventing the structure from being transferred to the correct position due to the direction of the structure is shifted It relates to a conveying method.

When constructing construction structures such as bridges, port facilities, civil engineering structures and large buildings, or when manufacturing structural structures such as ships or machinery, the lower part of the structure is used to move the structures that make up all or part of the structure to the desired position. A heavy load structure transfer method is applied to apply a transfer force by pushing a structure in a state in which a trolley or a sliding pad is installed in the movable state.

The high load structure transfer method uses a transfer device having a structure in which clamps are provided on both sides of a hydraulic cylinder that is usually stretched according to the supply of hydraulic oil. That is, both clamps are installed in a transfer path such as a rail so as to be disposed in front and rear of the transfer direction. In this state of the transfer device, the front clamp is directly or indirectly connected to the structure. First, the rear clamp is fixed to serve as a support point for applying the transfer force to the structure. As the clamp moves forward, the structure is pushed and moved. After the structure is moved by a predetermined distance, the front clamp is fixed and the hydraulic cylinder is contracted so that the rear clamp is advanced. Then, the above process is repeated to move the structure intermittently by the stroke of the hydraulic cylinder. do.

However, in the related art, due to the hydraulic pressure difference between the hydraulic cylinders, the structure is displaced in the left direction or the right direction during the transfer. Thus, in order to refit the displaced structure during the transfer, it causes a serious problem that wastes considerable time, manpower, and cost. do. For example, if a structure is displaced in position during transport and is delivered to its destination so that the bolt holes in the structure do not match the bolt holes in the previously transported structure, significant manpower, time, and cost are required to bring the structure back into position. This is a wasteful problem. In other words, due to the nature of transporting and constructing heavy and heavy load structures, a considerable amount of manpower, time, and effort must be administered to return the misplaced heavy load structure to its original position. This is a significant loss in the process.

The present invention is to solve the problems as described above, the object of the present invention is to prevent the transfer of the structure to the correct position due to the direction of the structure is shifted during the construction, when constructing civil construction or building construction or device structure It is to provide a method for transporting a heavy load structure of a new structure that can significantly improve the efficiency.

According to the present invention for solving the above problems, the rail arrangement process (S100) for arranging the rails 30 in two or more rows parallel to each other in the structure 10 transport path and connected to both ends of the hydraulic cylinder 180 The transfer device 100 formed by connecting the first clamp 110 and the second clamp 150 is installed on the two or more rails 30 so that the second clamp 150 faces the structure 10 side, respectively. Transfer device installation process (S110), and the vehicle installation process (S120) for installing a plurality of trolleys 20 supporting the structure 10 on each of the two or more rails 30, and the hydraulic cylinder 180 ) And at the same time the first clamp 110 is clamped to the rail 30 and the second clamp 150 releases the clamping to push the structure 10 while moving the second clamp 150 forward The first transfer process (S130) and the hydraulic cylinder 180 while the shrinkage operation and at the same time The second clamp 150 clamps the rail 30 and the first clamp 110 releases the clamping so that the first clamp 110 is advanced, and the first transfer process ( S130) and a high load structure transfer method is provided, which includes repeating the transfer step (S150) for repeatedly transferring the structure 10 to a desired position by repeatedly performing the second transfer process (S130).

According to the high load structure transfer method of the present invention, since the structure direction is prevented from being transferred to the correct position during the transfer of the structure, there is an effect of significantly improving the efficiency in the construction of civil structures, building structures or device structures .

Since the direction of the structure is prevented from being transferred to the correct position when the structure is transported, there is an effect of significantly improving the efficiency in the construction of civil structures or building structures or device structures.

That is, when the hydraulic pressure of the hydraulic cylinder at one point is relatively larger or smaller than the hydraulic pressure of the hydraulic cylinder at the other point, the structure tends to be distorted.

However, in the present invention, the rails are installed in four or more lines in even rows on the structure transfer path, and a plurality of trucks are installed on each rail, so that the hydraulic pressure of the hydraulic cylinder at one point is different from that of the hydraulic cylinder at the other point. When the structure is twisted because it is relatively larger or smaller than the hydraulic pressure, the trolley slides along the rails to balance the hydraulic pressure of the hydraulic cylinders at all points, so the structure is displaced and moved to the right position during the transportation of the structure. Since it is prevented from being prevented, there is an effect to significantly improve the efficiency in the construction of civil structures or building structures or device structures.

In other words, since the frictional force between the bogie and the structure contact surface is relatively higher than the frictional force between the bogie and the rail, the hydraulic pressure of the hydraulic cylinder at one point is relatively larger or smaller than the hydraulic pressure of the hydraulic cylinder at the other point. As the trolley slides together along the rails, it is possible to balance the hydraulic pressure of the hydraulic cylinders at all points, thereby preventing the structure from being displaced and moving to the correct position when moving the structure.

In particular, if the structure is displaced in place during transfer and the bolt hole of the structure does not match the bolt hole of the previously transferred structure, considerable manpower, time and cost are required to bring the structure back into place. Although there is a problem of waste, the present invention prevents the structure from being twisted during transportation, so that the structure and the position of the transported structure are exactly matched, and thus, there is an effect of eradicating waste such as manpower and time in advance. Significant benefits can be expected in the process.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the installation state of the high-load structure transfer method according to the present invention, the high load used in the high-load structure transfer method according to the present invention as a plan view, a side view, a front view and a back view in Figs. The structure of the structure transport apparatus 100 is shown in more detail.

Heavy load structure transfer method of the present invention is to transfer heavy and large heavy load structure 10 along the rails 30, such as civil engineering structures such as bridges, building structures such as concrete cases, device structures such as ships or machinery In the embodiment illustrated in FIG. 1, the structure 10 to be transported is a structure 10 having a large area such as a top plate of a bridge.

In the rail arrangement process (S110), the rails 30 are arranged in two or more rows side by side in the transport path of the structure 10. Preferably, the rail 30 is constituted by a pair of rail groups (35) paired with each other side by side arranged in two or more rows, the rail group (35) paired with each other is the structure 10 It is arranged in two or more rows in the conveying path. In the embodiment of the present invention shows that the rail group 35 is installed in two rows, according to the size of the structure 10 to increase the rail 30 in even rows. For example, by stretching the rail group 35 paired with each other, the rail 30 is arranged in even rows in the structure 10 transfer path.

In the transport device installation process (S110), the transport device 100 for supporting and transporting the high load structure 10 is slidably installed on each rail 30. The transfer device 100 is formed by connecting the first clamp 110 and the second clamp 150 connected to both ends of the hydraulic cylinder 180.

The first clamp 110 and the second clamp 150 is a structure connected by the hydraulic cylinder 180, the first clamp 110, the second clamp 150 and the hydraulic cylinder 180 in even rows It is slidably arrange | positioned at each rail 30 arrange | positioned. In addition, an adapter 40 is installed between the second clamp 150 and the structure 10.

In addition, the first clamp 110 or the second clamp 150 is transferred along the rail 30 by the operation of the hydraulic cylinder 180 installed in the two or more rails 30, each of the hydraulic cylinder 180 ) Is connected to a single integrated power unit 60 through a plurality of separate hydraulic supply lines 65, to uniformly supply the hydraulic pressure supplied from the integrated power unit 60 to each hydraulic cylinder 180. It is configured to be.

The first clamp 110 has a body 111 having a guide 112 through which the rail 30 passes, and a pair of claws movably installed at both sides of the guide 112. 113, a position adjusting mechanism 120 for moving the claw 113 to adjust the distance to the rail 30, and a stopper for limiting the position of the claw 113 by the position adjusting mechanism 120. 130 and the spring 147 and the elastic adjustment bolt 148 to elastically support the claw 113.

On both sides of the guide port 112 of the body 111, a mounting groove 112a is formed to receive the claw 113 so as to be movable. A rail along the conveying direction of the structure 10 is installed in the mounting groove 112a. A guide surface 112c inclined toward the side 30 is formed, and an inclined surface 113a is formed on the claw 113 in contact with the guide surface 112c, so that the claw 113 is moved along the moving direction of the body 111. Automatically press close to the side of the rail 30 or the pressing force is released, the clamping and releasing operation is performed without a separate power source.

The claw 113 is formed with a concave-convex surface 113b having a wedge shape to improve the clamping strength with respect to the surface of the rail 30. The uneven surface 113b may be formed in an asymmetrical shape according to the direction in which the force is applied, as well as the symmetrical shape of each wedge-shaped protrusion.

The position adjusting mechanism 120 moves the claw 113 apart from the clamping operation of the claw 113 which is automatically performed by a mechanical relationship. Position in which the clamping operation for the transfer is possible) or the release position relatively far from the rail 30 (interference with the rail 30 so as to facilitate movement and transportation of the transfer device 100, 100) ).

The position adjusting mechanism 120 is coupled to the bottom surface of the claw 113 and passes through the guide hole 114 formed in the bottom of the body 111, the guide block 115 is installed to be movable along the guide hole 114 ), A guide lever 121 coupled to the guide block 115, a rotary lever 123 coupled to the outside of the guide lever 121, and a lower end coupled to the rotary lever 123, and the body The rotary shaft 124 rotatably installed in an upright position to the 111, the operating lever 125 coupled to the upper portion of the rotary shaft 124, and is installed between the two operating lever 125, according to the expansion and contraction It consists of an operation cylinder 126 for moving the claw 113 connected through the rotary lever 123, the guide lever 121 and the guide block 115 by rotating the rotary shaft 124 in both directions.

The guide lever 121, the rotary lever 123, the rotating shaft 124 and the operation cylinder 126 are illustrated as operating means for moving the guide block 115 along the guide hole 114, the present invention In the operating means is not limited by the illustrated embodiment, various mechanical devices that can be connected to the claw 113 through the guide block 115 to move the claw 113 along the guide surface 112c. Can be made by.

The rotary lever 123 is rotatably coupled to the guide lever 121 so that the guide lever 121 can be bidirectionally moved within a predetermined range according to the rotation of the rotary lever 123. To this end, in the present embodiment, a coupling hole 122 protruding from the guide lever 121 is provided, and a coupling hole 123a having a long hole shape in which the coupling hole 122 is movably coupled to the rotation lever 123. The structure in which) is formed is illustrated.

The stopper 130 is installed to be movable along the guide groove 115 formed on one side of the body 111. To this end, a guide hole 116 is formed at one side of the guide groove 115 of the body 111, and a guide protrusion 132 inserted into the guide hole 116 is provided at the stopper 130. In addition, the stopper 130 is provided with a stopper 131 for contacting and supporting the guide block 115, the stopper 131 is formed with an inclined surface 131a is a stopper along the guide groove 115 According to the position of 130 is configured to limit the movement range of the guide block 115 differently.

The adjusting bolt 117 is screwed to the stopper 130 through the body 111 as a means for fixing and positioning the stopper 130. The adjusting bolt 117 is coupled to the body 111 so that only rotation is possible at the same position is configured to move the stopper 130 along the guide groove 115 in accordance with its rotation.

The spring 147 is inserted into the installation hole 101 formed in communication with the body 111 and the claw 113, the elastic adjustment bolt 148 is screwed into the installation hole 101 inlet of the body 111. . Accordingly, the claw 113 is supported by the elastic force of the spring 147 to maintain the contact state on the side of the rail 30, the elastic support force is changed in accordance with the rotation of the elastic adjustment bolt 148 Have

The second clamp 150 may be formed in the same structure as the first clamp 110 described above, but the embodiment has been described as having a simpler structure.

Referring to FIG. 8 together, the second clamp 150 has a body 151 having a guide 152 through which the rail 30 passes, and both hydraulic cylinders 180 of the body 151. It consists of a chuck 160 installed between the connecting portion.

The chuck 160 has a support 162 fixed to the body 151, a support shaft 163 installed in the horizontal direction on the support 162, and a shio-soh so as to be rotatable on both sides of the support shaft 163. It consists of a jaw (165) coupled to the structure and the chuck cylinder 161 is installed between the upper portion of both jaws (165). A bite protrusion 165a is formed at the lower portion of the jaw 165 to be clamped to the rail 30, and a surface of the bite protrusion 165a is in a wedge shape so as to increase the clamping strength. Concave-convex surface 165b is formed. The uneven surface 165b may also be formed in various forms as well as the illustrated form.

On the other hand, the hydraulic cylinder 180 may be a one-way expansion cylinder provided with a cylinder rod only on one side, or may be a bidirectional expansion cylinder provided with a cylinder rod on both sides. In addition, to control the operation of the hydraulic cylinder 180 by detecting an extension limit or a contraction limit of the hydraulic cylinder 180 on at least one side of the hydraulic cylinder 180, the first clamp 110, and the second clamp 150. Limit switches can be installed. In the illustrated embodiment, lever type limit switches 181 and 182 for detecting the extension limit and the contraction limit are respectively installed in the cylinder body portion of both hydraulic cylinders 180, and both bars 103 and 104 are provided in parallel in the feed direction. ) Is provided with the sensing holes 105, 106 for the operation of each limit switch (181, 182).

In the trolley installation process (S120), a plurality of trolleys 20 are installed to support the structure 10 on two or more rows of rails 30, respectively. Since the present embodiment adopts a method of increasing a pair of rail groups 35 parallel to each other, the rails 30 are arranged in four or more rows, and the bogie 20 is placed on each of the four or more rails 30. Will be installed.

In the first transfer process (S130), the hydraulic cylinder 180 is extended and at the same time, the first clamp 110 is clamped to the rail 30, and the second clamp 150 releases the clamping to release the second clamp 150. ) Moves forward with the structure 10 moving forward.

In the second transfer process (S130), the hydraulic cylinder 180 is contracted and at the same time, the second clamp 150 is clamped to the rail 30 and the first clamp 110 is released to clamp the first clamp 110. ) To advance.

In addition, in the repeating transfer process S150, the structure 10 is intermittently transferred to a desired position by repeatedly performing the first transfer process S130 and the second transfer process S130.

The high load structure transfer method of the present invention configured as described above allows the rails 30 to pass through the guides 112 and 152 through the first clamps 110 and the second clamps 150, respectively. It is installed to be movable along, the adapter 40 is installed between the second clamp 150 and the structure 10 so that the force can be transmitted between the two sides of different heights. When no external force is applied in the installed initial state, the claw 113 of the first clamp 110 maintains a weak contact with the rail 30 by the spring 147, and the second clamp ( Jaw 165 of 150 is in a state spaced apart from the rail (30).

After the installation is completed, when the hydraulic cylinder 180 is extended by supplying hydraulic oil, the second clamp 150 moves forward and moves the structure 10. At this time, the stretching force of the hydraulic cylinder 180 is applied to both sides of the first clamp 110 and the second clamp 150, the first clamp 110 is the claw 113 receives the force through the guide surface (112c) Since it is strongly press-contacted to the rail 30, it is clamped on the rail 30 to maintain a fixed position, and the second clamp 150 has both jaws 165 of the chuck 160 spaced apart from the rail 30. Since it is not constrained, the structure 10 is pushed and moved while moving forward.

When the structure 10 is moved by a predetermined distance, the hydraulic cylinder 180 is contracted by the operation of the limit switches 181 and 182 according to the extension of the hydraulic cylinder 180 or by a user. The clamp 110 is advanced. At this time, the chuck cylinder 161 is extended so that both jaws 165 are press-contacted to the rail 30, and accordingly clamping of the second clamp 150 is made, the second clamp 150 is fixed in the corresponding position The first clamp 110 may move smoothly by the contracting force of the hydraulic cylinder 180 because the claw 113 moves relative to the direction in which the pressing force against the rail 30 is released on the guide surface 112c. do.

Through the repeated transfer process (S150) repeating the first transfer process (S130) and the second transfer process (S140) can be moved to the desired position by intermittently moving the structure 10, the structure of the structure (10) After the transfer is completed, by operating the position adjusting mechanism 120 of the first clamp 110 to make the claw 113 in the position spaced apart from the rail 30, to easily move to the original position or crane, etc. Can be transported by That is, when the operation cylinder 126 is operated, the rotation shaft 124 is rotated, and the rotational force of the rotation shaft 124 is transmitted to the guide block 115 through the rotation lever 123 and the guide lever 121 to close the claw. The 113 is moved to a position where there is no interference with the rail 30 along the direction in which the guide hole 114 is formed. Accordingly, even if the first clamp 110 is moved or lifted, the clamping by the claw 113 is prevented. It is a state that is not made.

As described above, the high load structure transfer method of the present invention, while the claw 113 relative to the guide surface 112c in accordance with the direction of the force applied by the hydraulic cylinder 180 is clamping on the rail 30 It has a structure that is automatically made or released, that is, a structure that does not require a separate operating means for the clamping operation and release.

Furthermore, when the structure 10 is moved, the stronger the force (proportional to the load of the structure 10) applied by the hydraulic cylinder 180, the stronger the pressing force of the claw 113 against the rail 30, In particular, more stable support is possible when the heavy structure 10 is moved.

In particular, according to the present invention, a plurality of trucks 20 are installed at regular intervals on the rails 30 arranged in even rows in the transport path of the structure 10 so that the hydraulic pressure of the hydraulic cylinder 180 at any one point is different. When the hydraulic cylinder 180 of the point is relatively larger or smaller than the hydraulic pressure of the hydraulic cylinder 180 of all points slides together along the rail 30 at the moment when the structure 10 is about to be twisted. Since the hydraulic pressure can be balanced, the structure 10 is prevented from being moved to the correct position due to the disorientation of the structure 10 during the transport of the structure 10. Thus, the construction or the device structure of the civil structure 10 or the building structure 10 ( 10) It has the effect of remarkably improving the efficiency during manufacturing.

That is, when the structure 10 is transferred to the destination in a state in which it is displaced in the correct position during transportation, and the bolt hole of the structure 10 does not match the bolt hole of the structure 10 previously transferred, the structure 10 is re-fixed. It should be adjusted according to the position, but the present invention prevents the structure 10 from twisting during the transfer, so that the position exactly matches the structure 10 already transferred, the effect of eradicating the waste of manpower and time in advance In addition, significant benefits can be expected in the overall work process.

On the other hand, after the transfer operation of the structure 10 is completed, the clamping of the first clamp 110 by moving the claw 113 to the release position without interference with the rail 30 by the position adjustment mechanism 120 By preventing the operation, by releasing the restraint of the second clamp 150 by operating the chuck 160, it can be easily moved along the rail 30 to the desired position, to be lifted and transported for reuse It may be. This structure allows the transfer device 100 of the present invention to be installed and dismantled more usefully on the rail 30 having various rectangular cross sections, as well as on various types of rails 30. For example, in the case of the I-beam or H-beam-shaped rail 30, such as a truck rail 30, since the side portion to be clamped is drawn inwardly, the transfer device 100, 100 to the rail (30) ) Can be easily made by moving the claw 113 to the outside when disposed in or lifted from the rail (30).

In some cases, the second clamp 150 may have the same structure as that of the first clamp 110 described above. The above-described embodiment is suitable for moving the structure 10 in the horizontal plane, the first clamp 110 acting as a support point for applying a transfer force to the structure 10 is to be clamped for a large load, The clamping of the second clamp 150 requiring only a small fixing force for conveying the first clamp 110 is made by the operation of the chuck 160 of a small capacity. This configuration is useful to simplify the structure of the second clamp 150 to reduce the manufacturing cost and increase the convenience of maintenance.

When the structure 10 is pushed upward on the inclined surface, not only a large clamping force is required on the first clamp 110 to support the load when the structure 10 is pushed up, but also the structure 10 is pushed up. Since a large clamping force is required in the second clamp 150 to support the load of), it is preferable to make the second clamp 150 have the same structure as the first clamp 110.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a plan view showing an embodiment of a high load structure transfer method employing a high load structure transfer apparatus according to the present invention in an installed state.

Figure 2 is a view of the high-load structure conveying apparatus of the present invention shown in Figure 1 in the A direction.

Figure 3 is a front view of the heavy load structure transport apparatus of the present invention shown in FIG.

Figure 4 is a side view of the heavy load structure transport apparatus of the present invention shown in FIG.

5 is a front view of the heavy load structure transport apparatus of the present invention shown in FIG.

Figure 6 is a rear view of the heavy load structure transport apparatus of the present invention shown in FIG.

7 is a cross-sectional view along the line AA ′ of FIG. 4.

Figure 8 is an exploded perspective view showing the main portion of the first clamp in the high load structure conveying apparatus according to the present invention.

Figure 9 is a detailed view in the direction B of Figure 3 showing the chuck of the second clamp in the heavy load structure conveying apparatus according to the present invention.

10 is a flow chart of the high load structure transfer method of the present invention.

Claims (6)

A rail arrangement process (S110) for arranging the rails 30 in two or more rows parallel to each other in the transport path of the structure 10, and the first clamp 110 and the second clamp 150 connected to both ends of the hydraulic cylinder 180. ) Is a transfer device installation process (S110) respectively installed on the two or more rails 30 so as to face the second clamp 150 to the structure 10 side is connected to the transfer device 100 is connected (S110) and the two A trolley installation process (S120) for installing a plurality of trolleys 20 supporting the structures 10 on the rails 30 or more, and extending the hydraulic cylinder 180 and extending the first clamps. 110 is the first clamping process (S130), the hydraulic cylinder (clamping on the rail 30 and the second clamp 150 to release the clamping to push the structure 10 while moving forward the second clamp 150, The second clamp 150 is clamped to the rail 30 and the first clamp 11 at the same time as the contraction operation 180. 0) is a structure 10 by repeatedly performing the second transfer process (S130) and the first transfer process (S130) and the second transfer process (S130) to release the clamping to advance the first clamp (110). ) Is a high load structure transfer method comprising a repeating transfer process (S150) for intermittently transferring to a desired position. According to claim 1, wherein the rail 30 is composed of a pair of rail group (35) paired with one another parallel to each other is arranged in two or more rows, the rail group (35) paired with each other High load structure transfer method, characterized in that arranged in two or more rows in the structure (10) transfer path. According to claim 1, At least one of the first clamp 110 and the second clamp 150 is the body 111 and the guide 112 is formed with a guide 112 through which the rail 30 is passed. In the mounting grooves 112a formed on both sides of the claw 113, the claw 113 is installed to be movable in a position close to both sides of the rail 30, respectively, the inside of the mounting grooves 112a in the transport direction of the structure 10 The guide surface 112c inclined toward the rail 30 side is formed, and the inclined surface 113a is formed on the claw 113 in contact with the guide surface 112c, according to the moving direction of the body 111. High load structure transfer method, characterized in that the claw 113 is clamped or released to the rail (30). According to claim 1, The clamp 150 is positioned to apply a transfer force to the structure 10 of the first clamp 110 and the second clamp 150 is a guide 152 through which the rail 30 is passed. ) Is formed on the body 151, the support 162 fixed to the body 151, the support shaft 163 installed in the horizontal direction on the support 162, and rotates on both sides of the support shaft 163 The jaw 165 and the jaw 165 coupled between the jaws 165 may be coupled to each other. The clamping of the rail 30 may be performed according to the expansion and contraction of the chuck cylinder 161. High load structure transfer method characterized in that. The method of claim 4, wherein the body 111 and the spring 147 is inserted into the installation hole 101 formed in communication with the claw 113 to elastically support the claw 113 toward the rail 30 side, and the body 111 It is coupled to the installation hole 101) inlet of the high load structure transfer method, characterized in that it further comprises an elastic adjustment bolt 148 to increase or decrease the elastic support force by the spring (147). The method according to any one of claims 1 to 5, wherein the first clamp 110 or the second clamp 150 by the operation of the hydraulic cylinder 180 installed in the two or more rails (30) Transported along the rail 30, the hydraulic cylinder 180 is connected to the power unit 60 through a plurality of separate hydraulic supply line 65, the hydraulic pressure supplied from the power unit 60 High load structure transfer method, characterized in that to be uniformly supplied to each hydraulic cylinder (180).

Images