WO2008126999A1

WO2008126999A1 - Vertical transferring device for heavy load

Info

Publication number: WO2008126999A1
Application number: PCT/KR2008/001869
Authority: WO
Inventors: Young-Kun Hong
Original assignee: Kumkang Industry Co., Ltd.
Priority date: 2007-04-11
Filing date: 2008-04-03
Publication date: 2008-10-23
Also published as: KR100841011B1

Abstract

Provided is a vertical transferring device for a heavy load capable of raising and lowering various heavy goods to desired heights in construction sites, loading docks, or the like. The vertical transferring device for a heavy load includes a vertical member having a height larger than a lift height of the heavy load and including locking members disposed at lift sections; a pair of upper and lower lift operation means, one of which is connected to the heavy load, installed at the vertical member to be alternately raised and lowered along the vertical member as a lift shaft to raise and lower the heavy load, and both of which are put on the locking members at a predetermined height and fixed thereto while raising and lowering without interference with the locking members; and a lift drive means coupled between the upper and lower lift operation means to provide a lift drive force to the lift operation means.

Description

VERTICAL TRANSFERRING DEVICE FOR HEAVY LOAD

Technical Field

[1] The present invention relates to a vertical transferring device for a heavy load, and more particularly, to a vertical transferring device for a heavy load capable of raising and lowering various heavy goods to desired heights in construction sites, loading docks, or the like. Background Art

[2] In raising and lowering heavy construction frames or construction materials to desired heights in construction sites or in transferring heavy goods to predetermined heights in loading docks, a vertical transferring device is necessarily used.

[3] For example, a formwork is installed at an outer wall of a building structure upon construction of the structure. At this time, in order to perform smooth operations on the outer wall of the structure, a construction frame functioning as a scaffold is installed at the outer wall of the structure. The construction frame is continuously and additionally mounted higher depending on increase in the number of stories. In the conventional art, a climbing type construction frame entirely lifted by a crane is used when a multistory building is constructed. However, use of the crane increases operation time and cost and causes delay of construction procedures. For this reason, the applicant has filed Korean Utility Model Registration No. 423750, entitled Device for Lifting Temporary Stand, which can perform a temporary stand lifting operation using a lift member for lifting a vertical beam in a stepped manner, without using a crane.

[4] In the above device, the lift member is locked by locking projections formed at the vertical beam of the temporary stand in a vertical direction at predetermined intervals to lift the vertical beam in a stepped manner. In particular, the lift member reciprocates through constitution of a hydraulic cylinder and a hook in a lift direction to be selectively locked by any one of the locking projections of the vertical beam. Therefore, it is possible to safely and conveniently lift the temporary stand to a desired height in a stepped manner.

[5] Meanwhile, following the above lift device of the Utility Model, the applicant provides the present invention capable of more safely and conveniently lifting heavy goods.

Disclosure of Invention

Technical Problem

[6] In order to solve the foregoing and/or other problems, it is an object of the present invention to provide a vertical transferring device for a heavy load capable of raising and lowering various heavy goods to desired heights in construction sites, loading docks, or the like. Technical Solution

[7] One aspect of the present invention provides a vertical transferring device for a heavy load including: a vertical member having a height larger than a lift height of the heavy load and including locking members disposed at lift sections; a pair of upper and lower lift operation means, one of which is connected to the heavy load, installed at the vertical member to be alternately raised and lowered along the vertical member as a lift shaft to raise and lower the heavy load, and both of which are put on the locking members at a predetermined height and fixed thereto while raising and lowering without interference with the locking members; and a lift drive means coupled between the upper and lower lift operation means to provide a lift drive force to the lift operation means, wherein the lift operation means includes an upper frame and a lower frame; a support frame for connecting the upper frame and the lower frame; an operation piece installed at the support frame by a rotary support pin and rotatable relative to the locking members such that one end of the operation piece is put on the locking member or supports a lower side of the locking member; an anti-rotation pin installed at the support frame to support the other end of the operation piece to prevent rotation of the operation piece when the one end of the operation piece is put on the locking member or supports a lower side of the locking member; and a resilient member installed at the rotation support pin to provide a resilient force to rotate the operation piece in a direction in which the other end of the operation piece is supported by the anti-rotation pin.

[8] In addition, another aspect of the present invention provides a vertical transferring device for a heavy load including: a vertical member including a plurality of locking members disposed in a longitudinal direction thereof; a pair of upper and lower lift operation means, one of which is connected to an external structure, and the other of which is raised and lowered without interference with the locking members to stop at a predetermined height and support a lower side of the locking member to raise and lower the vertical member; and a lift drive means coupled between the upper and lower lift operation means to provide a lift drive force to the lift operation means, which is raised and lowered, wherein the lift operation means includes an upper frame and a lower frame; a support frame for connecting the upper frame and the lower frame; an operation piece installed at the support frame by a rotary support pin and rotatable relative to the locking members such that one end of the operation piece is put on the locking member or supports a lower side of the locking member; an anti-rotation pin installed at the support frame to support the other end of the operation piece to prevent rotation of the operation piece when the one end of the operation piece is put on the locking member or supports a lower side of the locking member; and a resilient member installed at the rotation support pin to provide a resilient force to rotate the operation piece in a direction in which the other end of the operation piece is supported by the anti-rotation pin.

[9] Here, the vertical member may be formed of two channels, and the locking members may connect the channels to each other.

[10] In particular, seating grooves may be formed at corresponding portions of the operation piece such that the operation piece is stably put on the locking member or supports a lower side of the locking member. In addition, corresponding portions of the locking members, on which the seating grooves of the operation piece are mounted, may be curved, and the seating grooves of the operation piece may have a larger radius of curvature than that of the locking member.

[11] Further, the operation piece and the rotation support pin may not be rotated relative to each other in a state in which the rotation support pin is coupled to the operation piece. In particular, coupling surfaces of the rotation support pin and the operation piece may be engaged with each other to prevent relative rotation therebetween. In addition, the rotation support pin may include a lever for manually rotating the rotation support pin and the operation pin to a desired angle.

[12] Further, the anti-rotation pin having a rectangular cross-section may be installed at the support frame such that outer surfaces of the anti-rotation pin are sloped with respect to the operation piece, and corresponding portions of the operation piece, which are in contact with the sloped surfaces of the anti-rotation pin, may be sloped.

[13] In addition, the resilient member may be a pair of torsion springs installed at the rotation support frame and disposed at both sides of the operation piece, one end of which is fixed to the operation piece and the other end of which is fixed to the support frame.

[14] Further, the lift operation means may include guide arms partially surrounding the vertical member.

[15] Furthermore, the upper and lower frames of the lift operation means may include upper and lower through-holes, respectively, upper and lower ends of the support frame may have left and right through-holes, respectively, and a coupling pin may be inserted into the left and right through-holes to couple the lift operation means to the lift drive means in a state in which an end of the lift drive means is inserted into the upper and lower through-holes.

[16] In addition, the lift operation means may include a fixing hole and a fixing pin for rotating and fixing the operation piece such that the operation piece is not interfered with by the locking members of the vertical member when the lift operation means is initially installed at the vertical member. [17] Further, the lift drive means may be a hydraulic actuator.

Advantageous Effects

[18] As can be seen from the foregoing, a vertical transferring device for a heavy load in accordance with the present invention can provide a simple structure in which a pair of lift operation means are lifted on a vertical member by a lift drive means in a stepped manner. In addition, the lift operation means of the present invention are installed at an external fixture to be operated such that the vertical member is lifted.

[19] Further, the vertical transferring device in accordance with the present invention may be connected to a construction frame installed at an outer wall of a building structure to lift the construction frame, or may be connected to a cage to load heavy goods and lift them.

[20] Therefore, various heavy goods can be safely and conveniently lifted to a desired height at construction sites or loading docks to thereby smoothly perform lift operations. Brief Description of the Drawings

[21] The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[22] FIG. 1 is a perspective view of a vertical transferring device for a heavy load in accordance with an exemplary embodiment of the present invention, which is installed at a channel;

[23] FIG. 2 is a plan view of the vertical transferring device for a heavy load of FIG. 1 ;

[24] FIG. 3 is an exploded perspective view of a first lift operation means in accordance with an exemplary embodiment of the present invention;

[25] FIG. 4 is an assembled perspective view of the first lift operation means of FIG. 3;

[26] FIG. 5 is a front view of the first lift operation means of FIG. 4;

[27] FIG. 6 is a side view of the first lift operation means of FIG. 5;

[28] FIGS. 7 to 10 are side views of a vertical member and the lift operation means, showing a raising operation process of the vertical transferring device for a heavy load in accordance with an exemplary embodiment of the present invention;

[29] FIGS. 11 to 14 are side views of the vertical member and the lift operation means, showing a lowering operation process of the vertical transferring device for a heavy load in accordance with an exemplary embodiment of the present invention; and

[30] FIGS. 15 to 19 are side views of the vertical transferring device for a heavy load in accordance with an exemplary embodiment of the present invention, which is installed at an outer structure to raise the vertical member. Mode for the Invention

[31] An exemplary embodiment of the present invention will now be described in detail with reference to the accompanying drawings. However, it will be apparent to those skilled in the art that the following embodiment may be changed or modified in various shapes, and scope of the present invention will not be limited thereto.

[32] FIG. 1 is a perspective view of a vertical transferring device for a heavy load in accordance with an exemplary embodiment of the present invention, which is installed at a channel, and FIG. 2 is a plan view of the vertical transferring device for a heavy load of FIG. 1. As shown in FIGS. 1 and 2, the vertical transferring device for a heavy load in accordance with the present invention includes a vertical member 100, lift operation means 200 and 300, and a lift drive means 400.

[33] The vertical member 100 is a structural frame having a height higher than a predetermined lift position such that a heavy load (not shown) is raised to a desired height. In particular, in this embodiment, the vertical member 100 has a structure in which two channels 110 and 120 spaced a predetermined distance from each other at their rear surfaces are connected by puller bolts. The puller bolt is a bolt having a smooth outer surface, except for a fastening end, and thus may be replaced with a conventional bolt having a bushing coupled thereto. A member, in which a boss is coupled to the puller bolt or the conventional bolt, will be referred to as a locking member 130, since the member functions to lock operation pieces 260 and 360 of the lift operation members 200 and 300. The locking members 130 are installed between the channels at predetermined intervals corresponding to predetermined sections, at which a heavy load is raised. The above vertical member 100 is installed at a structure in a place, in which a lift operation of a heavy load is required (for example, an outer wall of a structure, at which a construction frame is installed).

[34] The lift operation means 200 and 300 are formed as a pair of upper and lower lift operation means. For the convenience of description, the lower means is referred to as a first lift operation means 200, and the upper means is referred to as a second lift operation member 300. The first lift operation means 200 and the second lift operation means 300 are installed at the vertical member 100 to alternately lift using the vertical member as a lift shaft. In particular, the lift operation means 200 and 300 climb the vertical member 100 without interference of the locking members 130 connecting the two channels 110 and 120 when the lift operation means 200 and 300 are raised, and are locked by the hooking members 130 at a predetermined height to be stopped on the hooking members 130, which will be described below.

[35] The lift drive means 400 is coupled between the first lift operation means 200 and the second lift operation means 300 to provide a drive force to lift the lift operation means 200 and 300. For example, the lift drive means 400 may be a hydraulic actuator providing a large force, and good shock absorption and control performance. FIG. 1 illustrates the hydraulic actuator including a hydraulic cylinder 410 for receiving operation fluid from a hydraulic source (not shown) to be operated, a piston rod 420, and so on.

[36] As described above, the first lift operation means 200, the second lift operation means 300, and the lift drive means 400 are assembled to each other and installed at the vertical member 100 as shown in FIG. 1.

[37] Next, a specific embodiment of the lift operation means 200 and 300 will be described in detail.

[38] FIGS. 3 and 4 are an exploded perspective view and an assembled perspective view of a first lift operation means in accordance with an exemplary embodiment of the present invention, and FIGS. 5 and 6 are a front view and a side view of the respective lift operation means. In this embodiment, the first lift operation means 200 and the second lift means 300 have the same constitution, except that coupling positions of the lift drive means 400 are different. Therefore, the lift operation means shown in FIGS. 3 to 6 is referred to as a first lift operation means, and constitution of the first lift operation means will be described.

[39] The first lift operation means 200 includes an upper frame 210 and a lower frame

220, and a pair of right and left support frames 230 and 230' for vertically connecting the upper frame 210 and the lower frame 220. The upper frame 210 has a vertical through-hole 211, into which a lower end of the lift drive means 400 is inserted, to be connected to the lift drive means 400. In addition, upper ends of the support frames 230 and 230' have right and left through-holes 231 and 231' such that a lower end of the lift drive means 400 inserted into the upper and lower through-holes 211 is fixed by a coupling pin 240. Therefore, as shown in FIG. 1, the first lift operation means 200 is coupled to the lift drive means 400 by inserting the coupling pin 240 into the left and right through-holes of the upper ends of the support frames 230 and 230' in a state in which a lower end of the lift drive means 400 is inserted into the vertical through-hole 211 of the upper frame 210. Meanwhile, since the lower frame 220 of the first lift operation means 200 also has a vertical through-hole 221, into which the upper end of the lift drive means 400 can be inserted, and lower ends of the support frames 230 and 230' also have left and right through-holes 232 and 232', into which the coupling pin is inserted, the first lift operation means 200 can be compatible with the second lift operation means 300. That is, as shown in FIG. 1, in a state in which the upper end of the lift drive means 400 is inserted into a vertical through-hole of a lower frame 320, the second lift operation means 300 is coupled to the lift drive means 400 by inserting the coupling pin 340 into left and right through-holes of lower ends of support frames 330 and 330'. In addition, while not shown, a structure for loading heavy goods can be installed at an upper frame 310 of the second lift operation means 300 to raise the heavy goods.

[40] Guide arms 250 are formed at the upper frame 210 and the lower frame 220 of the first lift operation means 200 to be coupled to the vertical member 100, respectively. In particular, the guide arms 250 partially surround the channels 110 and 120 of the vertical member 100 such that the first lift operation means 200 is smoothly raised or lowered along the vertical member 100. The second lift operation means 300 also has the same structure of the guide arms 250.

[41] Operation piece 260 having an oval shape with a major axis in a direction perpendicular to the pair of support frames 230 and 230' is installed between the pair of support frames 230 and 230'. The operation piece 260 is configured to be rotated between the support frames 230 and 230' by a rotary support pin 270 passing through the support frames 230 and 230'. That is, the operation piece 260 is rotated by the locking members 130 of the vertical member 100 upon lift of the first lift operation member 200, and is put on the locking members 130 upon stop of the lifting operation. In particular, a portion of the operation piece 260 put on the locking member 130 has a curved-shaped seating groove 261. In addition, while the locking member 130 has a cylindrical shape, but not limited thereto, the portion of the operation piece 260 may have only a circular cross-section. At this time, the seating groove 261 of the operation piece 260 may have a larger radius of curvature than that of the locking member 130 such that the operation piece 260 is stably put on the locking member 130.

[42] An anti-rotation pin 280 is installed at the support frames 230 and 230' through anti- rotation pin insertion holes 235 and 235' (see FIGS. 11 and 3) to stop rotation of the operation piece 260. As shown in FIG. 6, the anti-rotation pin 280 functions to prevent the operation piece 260 from being rotated clockwise to a predetermined angle or more. That is, in a state in which one end of the operation piece 260 is put on the locking member 130, the anti-rotation pin 280 supports the other end of the operation piece 260. In particular, the anti-rotation pin 280 has a rectangular cross-section, which is installed at the support frames 230 and 230' such that corners of the anti-rotation pin 280 are directed in upper, lower, left and right directions thereof and thus the outer surfaces of the anti-rotation pin 280 are sloped with respect to the operation piece 260. For this reason, portions of the operation piece 260 in contact with the left slope surfaces 280a and 280b of the anti-rotation pin 280 upon rotation of the operation piece 260 also have slope surfaces 260a and 260b. As shown in FIGS. 1 and 3, the anti- rotation pin 280 may have an eyebolt 281 acting as a handle. In addition, the support frame 230 disposed at an insertion side of the anti-rotation pin 280 may include a bracket 233 for spacing an insertion distance of the anti-rotation pin 280. [43] A resilient member 290 is installed around a rotation support pin 270. The resilient member 290 provides a resilient force to be recovered in a direction in which the slope surfaces 260a and 260b of the operation piece 260 are always in contact with the slope surfaces 280b and 280a of the anti-rotation pin 280 when the operation piece 260 is rotated by an external force. In particular, as shown in FIG. 6, in this embodiment, the resilient member 290 provides a resilient force such that the lower slope surface 260b of the operation piece 260 is rotated clockwise to be put on the left upper slope surface 280a of the anti-rotation pin 280. The resilient member 290 may be conventional torsion springs, which are stably installed at both sides of the operation piece 260. In addition, one end of each resilient member 290 is fixed to the operation piece 260, and the other end of the resilient member 290 is fixed to the support frames 230 and 230'.

[44] Meanwhile, in a state in which the rotation support pin 270 is coupled to the operation piece 260, the operation piece 260 and the rotation support pin 270 cannot be relatively rotated with each other. For example, as shown in FIG. 3, a groove 270a is concaved in an outer periphery of the rotation support pin 270, and a projection 260c is formed at a hole of the operation piece 260, through which the rotation support pin 270 passes, to be closely fitted into the groove 270a. Therefore, an engaging structure of the groove 270a and the projection 260c couples the rotation support pin 270 to the operation piece 260 to prevent relative movement therebetween. For this reason, if the rotation support pin 270 is arbitrarily rotated, the operation piece 260 is rotated together with the rotation support pin 270. In addition, a lever 271 is installed at the rotation support pin 270 to manually rotate the rotation support pin 270 to a desired angle. Adjusting the lever 271, the operation pin 260 is rotated with the rotation support pin 270.

[45] When the first lift operation means as described above is installed at the vertical member 100, since the operation piece 260 may be interfered with by the locking member 130 causing troublesomeness in an installation operation, it is preferable that the operation piece 260 is fixed after rotating the operation piece 260 by a predetermined angle. Therefore, in this embodiment, as shown in FIGS. 5 and 6, fixing holes 230a and 230'a are formed in the support frames 230 and 230', and a fixing pin 234 (see FIG. 1) inserted into the fixing holes 230a and 230a' is illustrated. That is, after rotating downward a front part of the operation piece 260 opposite to the vertical member 100 to a certain angle using the lever 271 such that the rear lower slope surface 260b of the operation piece 260 is located in front of the fixing holes 230a and 230'a, the fixing pin 234 is inserted into the fixing holes 230a and 230'a. In this state, when the first lift operation means 200 is installed from an upper or lower end of the vertical member 100, the operation piece 260 can be installed without any interference with the locking members 130 of the vertical member 100. After installation of the first lift operation means 200, the fixing pin 234 is removed such that the operation piece 260 can be properly operated.

[46] The second lift operation means 300 also has the same constitution as the first lift operation means 200, except for a coupling position of the lift drive means 400.

[47] Hereinafter, a lift operation of the vertical transferring device in accordance with the present invention will be described with reference to the constitution of the above embodiment.

[48] FIGS. 7 to 10 are side views of a vertical member and the lift operation means, showing a raising operation process of the vertical transferring device for a heavy load in accordance with an exemplary embodiment of the present invention. An operation sequence of the vertical transferring device performed when a heavy load is raised to a predetermined height will be described with reference to the drawings as follows.

[49] First, as shown in FIG. 7, the first lift operation means 200 is fixed on the vertical member 100 by putting both ends of the operation piece 260 on the locking member 131 and the anti-rotation pin 280, respectively. Similarly, the second lift operation means 300 is also fixed on the vertical member 100 by putting both ends of an operation piece 360 on a locking member 133 and an anti-rotation pin 380, respectively. In this state, the lift drive means 400 connecting the first lift operation means 200 and the second lift operation means 300 is operated. That is, in this embodiment, when operation fluid is supplied into the hydraulic cylinder 410 of the lift drive means 400, illustrated as a hydraulic actuator, from a hydraulic source (not shown), the piston rod 420 is elongated from the hydraulic cylinder 410 to raise the second lift operation means 300. At this time, the operation piece 360 maintains a state in which a right end of the operation piece 360 is put on the anti-rotation pin 380 by a resilient force of the resilient member 190' (see FIGS. 3 and 6). Then, when the operation piece 360 of the second lift operation means 300 is in contact with an upper locking member 134, as shown by an imaginary line, the operation piece 360 is rotated in an arrow direction. Next, as the second lift operation means 300 is continuously raised, the operation piece 360 is rotated to its original state by a recovering force of the resilient member. In addition, as shown in FIG. 8, both ends of the operation piece 360 are put on the locking member 134 and the anti-rotation pin 380 to fix the second lift operation means 300 at a raised height.

[50] Meanwhile, as shown in FIGS. 9 and 10, the first lift operation means 200 is raised on the vertical member 100 as the hydraulic cylinder 410 and the piston rod 420 are contracted by removing the hydraulic pressure of the lift drive means 400. At this time, the first lift operation means 200 has the same structure as the second lift operation means 300, in which the operation piece 260 of the first lift operation means 200 is rotated with respect to the locking members 131 and 132 and then put on the locking member 132 and the anti-rotation pin 280 to be fixed thereto.

[51] As described above, elongation and contraction of the lift drive means 400 alternately pass the operation pieces 260 and 360 of the first lift operation means 200 and the second lift operation means 300 through the locking members 131, 132, 133 and 124 of the vertical member 100 step by step, and then, fix the operation pieces 260 and 360 on the locking members 131, 132, 133 and 134 and the anti-rotation pins 280 and 380 to raise the lift operation means 200 and 300 to a predetermined height.

[52] Next, FIGS. 11 to 14 are side views of the vertical member and the lift operation means, showing a lowering operation process of the vertical transferring device for a heavy load in accordance with an exemplary embodiment of the present invention. An operation sequence of the vertical transferring device performed when a heavy load is lowered to a predetermined height will be described with reference to the drawings as follows.

[53] First, in order to lower the first lift operation means 200, the anti-rotation pin 280 fixing the operation piece 260 of the first lift operation means 200 in a state shown in FIG. 10 is removed. Then, as shown in FIG. 11, the operation piece 260 is rotated in an arrow direction of FIG. 11 to be separated from the locking member 132. At the same time, a hydraulic pressure is supplied into the lift drive means 400 to elongate the hydraulic cylinder 410 and the piston rod 420 to lower the first lift operation means 200 along the vertical member 100. Then, as shown in FIG. 12, when the first lift operation means 200 arrives at a desired lowering height, the operation piece 260 is rotated in the arrow direction of FIG. 11 using the lever 271 shown in FIGS. 3 to 6 to be turned upward over the anti-rotation pin insertion hole 235 and then coupled to the anti-rotation pin 280 again. As a result, both ends of the operation piece 260 are put on the locking member 131 and the anti-rotation pin 280 to fix the first lift operation means 200.

[54] Meanwhile, as shown in FIGS. 13 and 14, the second lift operation means 300 is lowered along the vertical member 100 as the hydraulic cylinder 410 and the piston rod 420 are contracted by removing a hydraulic pressure of the lift drive means 400. Similarly, after removing the anti-rotation pin 380 fixing the operation piece 360 of the second lift operation means 300, the lift drive means 400 is operated. As a result, the operation piece 360 of the second lift operation means 300 is separated from the locking member 134 to be freely rotated to lower the second lift operation means 300. When the second lift operation means 300 arrives at a target height, like the first lift operation means 200, the operation piece 360 is rotated using the lever, and then, the removed anti-rotation pin 380 is coupled thereto again. As a result, both ends of the operation piece 360 are locked by the lock member 133 and the anti-rotation pin 380 to fix the second lift operation means 300 to the vertical member 100. [55] As described above, in order to lower the first lift operation means 200 and the second lift operation means 300, in a state in which the anti-rotation pins 280 and 380 fixing the operation pieces 260 and 360 of the first lift operation means 200 and the second lift operation means 300 are temporarily removed such that the operation pieces 260 and 360 can be freely rotated, the lift drive means 400 can be elongated or contracted. In addition, when the anti-rotation pins 280 and 380 are coupled at an expected height to stop rotation of the operation pieces 260 and 360, the lift operation means 200 and 300 are fixed to the vertical member 100 to complete a lowering operation thereof.

[56] As described above, the lift operation means 200 and 300 installed at the vertical member 100 are alternately lifted and lowered along the vertical member 100 as a lift shaft to lift a heavy load. However, the lift operation means 200 and 300 in accordance with the present invention may be installed at an external structure such as a construction frame installed at an outer wall of a building to lift the vertical member 100. Hereinafter, like reference numerals designate like elements in the above embodiment, which will also be described in detail.

[57] The vertical member 100 is formed of a structural frame including a plurality of locking members 130, 131, 132, 133 and 134 longitudinally disposed in a vertical direction thereof. For example, like the aforementioned embodiment, the vertical member 100 is formed of two channels 110 and 120, which are connected to each other by the locking members 130, 131, 132, 133 and 134. A loading means for lifting a heavy load, and so on, may be separately coupled to the vertical member 100.

[58] The lift operation means 200 and 300 have the same constitution as the aforementioned embodiment. However, one of the first lift operation means 200 and the second lift operation means 300 is fixed to an external structure such as a construction frame installed at an outer wall of a building. FIGS. 15 to 19 illustrate the second lift operation means 300 fixed to an external structure 500, and the first lift operation means 200 configured to lift the vertical member 100. On the other hand, the first lift operation means 200 may be fixed to the external structure 500, and the second lift operation means 300 may be configured to raise and lower the vertical frame 100.

[59] Hereinafter, a process of raising the vertical member 100 will be described according to the sequence pictured in FIGS. 15 to 19.

[60] First, as shown in FIG. 15, an upper end of the second lift operation means 300 is fixed to the external structure 500 by the coupling pin 240, and both the first lift operation means 200 and the second lift operation means 300 are opposite to the vertical member 100. In addition, for example, it is provided that the vertical member 100 is located on the ground. At this time, the operation pieces 260 and 360 of the first lift operation means 200 and the second lift operation means 300 are put on the locking members 132 and 134 of the vertical member 100, respectively. In particular, similar to the aforementioned embodiment, the operation pieces 260 and 360 receive a force to be rotated clockwise by a resilient member 290 (see FIG. 6), but the operation pieces 260 and 360 are fixed by the anti-rotation pins 280 and 380, and not rotated.

[61] Then, when the anti-rotation pins 280 and 380 are removed as shown in FIG. 16, the operation pieces 260 and 360 of the first lift operation means 200 and the second lift operation means 300 are rotated clockwise by a resilient force of the resilient member to be separated from the locking members 132 and 134. In particular, the right upper slope surface 260a (see FIG. 6) of the operation piece 260 of the first lift operation means 200 is located under the anti-rotation pin insertion hole 235, and the operation piece 360 of the second lift operation means 300 is in a state similar to the operation piece 260.

[62] In this state, when the anti-rotation pins 280 and 380 are inserted into the anti- rotation pin insertion holes 235 and 335 of the lift operation means 200 and 300, as shown in FIG. 17, the operation pieces 260 and 360 cannot be rotated counterclockwise due to the anti-rotation pins 280 and 380. Then, when the lift drive means 400 is operated, the hydraulic cylinder 410 and the piston rod 420 are elongated to Io wer the first lift operation means 200.

[63] For example, in a state in which the first lift operation means 200 is lowered to a position of the locking member 131 of FIG. 18, when the hydraulic cylinder 410 and the piston rod 420 of the lift drive means 400 are contracted again, the first lift operation means 200 is raised. At this time, a left end of the operation piece 260 supports a lower side of the locking member 131 by a load of the vertical member 100, and a right end of the operation piece 260 is continuously locked by a lower side of the anti-rotation pin 280. Therefore, the first lift operation means 260 is raised as rotation of the operation piece 260 is stopped, and the vertical member 100, the locking member 131 of which is supported by the operation piece 260, is also raised together therewith. As a result, as shown in FIG. 19, the vertical member 100 is raised by a height to which the first lift operation means 260 is raised. Then, when the lift drive means 400 is repeatedly elongated and contracted to raise and lower the first lift operation means 200, the vertical member 100 can be raised to a desired height.

[64] Meanwhile, when the vertical member 100 is lowered, the operation piece 360 of the second lift operation means 300 is located as shown in FIG. 15 such that the locking members 133 and 134 of the vertical member 100 are not supported by the operation piece 360, and the operation piece 260 of the first lift operation means 200 is maintained in a state of FIGS. 17 to 19. Then, since a load of the vertical member 100 is applied to the first lift operation means 200 only, the first lift operation means 200 is lowered to lower the vertical member 100 upon operation of the lift drive means 400. [65] While few exemplary embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes may be made to these embodiments without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. Industrial Applicability

[66] As can be seen from the foregoing, a vertical transferring device for a heavy load is provided to raise and lower various heavy goods to desired heights in construction sites, loading docks, or the like.

[67]

[68]

Claims

[1] A vertical transferring device for a heavy load comprising: a vertical member having a height larger than a lift height of the heavy load and including locking members disposed at lift sections; a pair of upper and lower lift operation means, one of which is connected to the heavy load, installed at the vertical member to be alternately raised and lowered along the vertical member as a lift shaft to raise and lower the heavy load, and both of which are put on the locking members at a predetermined height and fixed thereto while raising and lowering without interference with the locking members; and a lift drive means coupled between the upper and lower lift operation means to provide a lift drive force to the lift operation means, wherein the lift operation means comprises an upper frame and a lower frame; a support frame for connecting the upper frame to the lower frame; an operation piece installed at the support frame by a rotary support pin and rotatable relative to the locking members such that one end of the operation piece is put on the locking member or supports a lower side of the locking member; an anti-rotation pin installed at the support frame to support the other end of the operation piece to prevent rotation of the operation piece when the one end of the operation piece is put on the locking member or supports a lower side of the locking member; and a resilient member installed at the rotation support pin to provide a resilient force to rotate the operation piece in a direction in which the other end of the operation piece is supported by the anti-rotation pin.

[2] A vertical transferring device for a heavy load comprising: a vertical member including a plurality of locking members disposed in a longitudinal direction thereof; a pair of upper and lower lift operation means, one of which is connected to an external structure, and the other of which is raised and lowered without interference with the locking members to stop at a predetermined height and support a lower side of the locking member to raise and lower the vertical member; and a lift drive means coupled between the upper and lower lift operation means to provide a lift drive force to the lift operation means, which is raised and lowered, wherein the lift operation means comprises an upper frame and a lower frame; a support frame for connecting the upper frame and the lower frame; an operation piece installed at the support frame by a rotary support pin and rotatable relative to the locking members such that one end of the operation piece is put on the locking member or supports a lower side of the locking member; an anti-rotation pin installed at the support frame to support the other end of the operation piece to prevent rotation of the operation piece when the one end of the operation piece is put on the locking member or supports a lower side of the locking member; and a resilient member installed at the rotation support pin to provide a resilient force to rotate the operation piece in a direction in which the other end of the operation piece is supported by the anti-rotation pin.

[3] The vertical transferring device for a heavy load according to claim 1 or 2, wherein the vertical member is formed of two channels, and the locking members connect the channels to each other.

[4] The vertical transferring device for a heavy load according to claim 1 or 2, wherein seating grooves are formed at corresponding portions of the operation piece such that the operation piece is stably put on the locking member or supports a lower side of the locking member.

[5] The vertical transferring device for a heavy load according to claim 4, wherein corresponding portions of the locking members, on which the seating grooves of the operation piece are mounted, are curved, and the seating grooves of the operation piece have a larger radius of curvature than that of the locking member.

[6] The vertical transferring device for a heavy load according to claim 1 or 2, wherein the operation piece and the rotation support pin cannot be rotated relative to each other in a state in which the rotation support pin is coupled to the operation piece.

[7] The vertical transferring device for a heavy load according to claim 6, wherein coupling surfaces of the rotation support pin and the operation piece are engaged with each other to prevent relative rotation therebetween.

[8] The vertical transferring device for a heavy load according to claim 6, wherein the rotation support pin includes a lever for manually rotating the rotation support pin and the operation pin to a desired angle.

[9] The vertical transferring device for a heavy load according to claim 1 or 2, wherein the anti-rotation pin having a rectangular cross-section is installed at the support frame such that outer surfaces of the anti-rotation pin are sloped with respect to the operation piece, and corresponding portions of the operation piece, which are in contact with the sloped surfaces of the anti-rotation pin, are sloped.

[10] The vertical transferring device for a heavy load according to claim 1 or 2, wherein the resilient member is a pair of torsion springs installed at the rotation support frame and disposed at both sides of the operation piece, one end of which is fixed to the operation piece and the other end of which is fixed to the support frame.

[11] The vertical transferring device for a heavy load according to claim 1 or 2, wherein the lift operation means includes guide arms partially surrounding the vertical member.

[12] The vertical transferring device for a heavy load according to claim 1 or 2, wherein the upper and lower frames of the lift operation means include upper and lower through-holes, respectively, upper and lower ends of the support frame have left and right through-holes, respectively, and a coupling pin is inserted into the left and right through-holes to couple the lift operation means to the lift drive means in a state in which an end of the lift drive means is inserted into the upper and lower through-holes.

[13] The vertical transferring device for a heavy load according to claim 1 or 2, wherein the lift operation means includes a fixing hole and a fixing pin for rotating and fixing the operation piece such that the operation piece is not interfered with by the locking members of the vertical member when the lift operation means is initially installed at the vertical member.

[14] The vertical transferring device for a heavy load according to claim 1 or 2, wherein the lift drive means is a hydraulic actuator.