Auxiliary device for lifting cargo

Abstract

To facilitate work when a long member is unloaded on a horizontal material.SOLUTION: An auxiliary device 30 for unloading which is applied when a folded plate 20 is unloaded on a tight frame 14 of a trestle 10 in the state where longitudinal sides cross the tight frame 14 includes: a device body 31 with both ends and a lower surface opened through a guide groove 34a, which is disposed on the upper part of the tight frame 14 in the state of being movable in a direction along the longitudinal sides of the tight frame 14 through the guide groove 34a; and a roller 32 which is placed on the upper part of the device body 31, and is rotatable around a shaft center along the longitudinal sides of the tight frame 14.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to an auxiliary device for unloading, which is suitable for unloading a long member onto a horizontal member of a gantry.

Background Art

[0002] [[ID=十二年]]In a roofed structure such as a carport or a terrace, a construction method is generally used in which structural members such as columns and beams are first assembled to form a gantry, and then roofing materials such as folded plates are sequentially attached between horizontal members such as a tight frame attached to the upper surface of the beam. Therefore, when assembling a carport or a terrace, it is necessary to perform an operation of unloading a roofing material onto the upper surface of a high horizontal member. Specifically explaining the operation of unloading a roofing material onto the upper surface of a horizontal member, as shown in FIG. 8, it is an operation by multiple people. First, as shown in FIG. 8(a), at the front side of the horizontal member 1, two workers 3A on the step ladder 2 and the worker 3B on the ground lift one end of the roofing material 4 so that it is above the horizontal member 1. From this state, as shown in FIGS. 8(b) to (c), the worker 3B on the ground climbs onto another step ladder near the back horizontal member 1 and supports the roofing material 4 with the two workers 3A and 3B at a position above the horizontal member 1. Then, as shown in FIG. 8(d), the two workers 3A and 3B cooperate to place the roofing material 4 on the horizontal member 1. As is also clear from FIG. 8(b), in order to arrange the substantially entire length of the roofing material 4 above the horizontal member 1, a situation may occur where the worker 3A supports it alone. The roofing material 4 is often configured to be long and is also a relatively heavy object, and thus is not necessarily preferable in terms of workability. In particular, when a metal folded plate is applied as the roofing material 4, the above problems become prominent.

[0003] As a device for lifting a long member to a high place, for example, there is one described in Patent Document 1. By applying this device, it is possible to facilitate the operation of arranging the roofing material 4 at a position higher than the horizontal member 1.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Publication number 4-44549 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] However, even when the above-described device is applied, the situation still arises where worker 3A has to support the roofing material 4, which is positioned higher than the horizontal member 1, by himself just before it is moved to the upper surface of the horizontal member 1, and thus the above-described problem is not solved.

[0006] In view of the above circumstances, the present invention aims to provide a lifting auxiliary device that can facilitate the work of lifting long members onto horizontal members. [Means for solving the problem]

[0007] To achieve the above objective, the lifting auxiliary device according to the present invention is a frame A horizontal member is provided on the upper surface of the beam that constitutes the structure, A lifting auxiliary device for use when lifting a long member above a horizontal member with its longitudinal side intersecting the horizontal member, comprising: a device body positioned on the upper part of the horizontal member, having both ends and the bottom surface open via guide grooves and movable in the direction along the longitudinal side of the horizontal member via the guide grooves; and a device body disposed on the upper part of the device body, via the shaft support plate The aforementioned horizontal member can be rotatable around an axis along its longitudinal direction. The device comprises a supported roller, and the main body of the device, including the shaft support plate, is configured to be narrower than the beam. It is characterized by the following: [Effects of the Invention]

[0008] According to the present invention, when a long member is placed on a roller and then moved inward while the roller is rolling, the long member can be positioned above the horizontal member, and the long member can be supported by both the roller and the worker, thereby simplifying the work. Moreover, since the position is changed by moving the main body of the device along the length of the horizontal member via the guide groove, the work of lifting multiple long members can be carried out efficiently. [Brief explanation of the drawing]

[0009] [Figure 1] This is an overhead perspective view of a carport, which is an example of an application for the cargo lifting auxiliary device, an embodiment of the present invention. [Figure 2] Figure 1 is a side view of the carport. [Figure 3] Figure 1 shows the main parts of the carport, with (a) being a cross-sectional view of the beam and tight frame, (b) being a side view of the beam and tight frame, and (c) being an end view of the corrugated sheet metal viewed from the short side. [Figure 4] This shows an auxiliary device for lifting cargo; (a) is a perspective view, (b) is a magnified view of the roller from the circumferential side, and (c) is a magnified view of the roller from the end face side. [Figure 5] Figure 4 shows the lifting auxiliary device positioned on the tight frame; (a) is a view from the circumferential side of the roller, (b) is a view from the end face side of the roller, and (c) is a close-up view of the main part of (b). [Figure 6] Figure 4 is a perspective view showing the lifting support device positioned on the tight frame. [Figure 7] This is a conceptual diagram illustrating the steps involved in placing a corrugated sheet metal onto the upper surface of a tight frame installed on a beam, using the lifting support device shown in Figure 4. [Figure 8] This is a conceptual diagram illustrating the steps involved in placing corrugated metal sheets onto the upper surface of a tight frame installed on a beam, performed solely by workers. [Modes for carrying out the invention]

[0010] Hereinafter, preferred embodiments of the lifting auxiliary device according to the present invention will be described in detail with reference to the attached drawings. Figures 1 and 2 show a carport that is an example of an application target for the cargo lifting auxiliary device, which is an embodiment of the present invention. The carport illustrated here is constructed by forming a frame 10 by erecting beams 12 and girders 13 on top of four columns 11, and further by attaching a folded plate (long member) 20 between the upper surfaces of two beams 12 via a tight frame (horizontal member) 14. As shown in Figures 3(a) and 3(b), the tight frame 14 has a plurality of trapezoidal protrusions provided at equal intervals along its length. More specifically, the tight frame 14 consists of a flat upper surface 14a, a first inclined surface 14b, a lower surface 14c, and a second inclined surface 14d as one unit, which are continuous along the length and are attached to the upper surface of the beam 12 via the lower surface 14c. Stud bolts 14e are provided to protrude upward from each upper surface 14a of the tight frame 14. As is clear from the figure, the tight frame 14 in this embodiment is formed to a constant width smaller than the beam 12 and is attached to each other at positions where their centers are approximately aligned. Although not explicitly shown in the figure, the tight frames 14 attached to the upper surfaces of the two beams 12 are arranged in an aligned state so that their upper surfaces 14a face each other. The corrugated sheet 20 is a long, thin sheet with a longitudinal dimension larger than the distance between the beams 12, and functions as the roof of a carport when multiple sheets are arranged in a row along the longitudinal direction of the beams 12. As is clear from the figure, the corrugated sheet 20 is provided with repeating trapezoidal protrusions and recesses to match the irregularities of the tight frame 14. The corrugated sheet 20 is placed on the upper surface of the tight frame 14 with its edges overlapping, and is attached to the beam 12 via the tight frame 14 by screwing nuts onto the stud bolts 14e that pass through it.

[0011] The lifting assist device 30 applied to the carport described above assists in the work of lifting corrugated sheets 20 onto a tight frame 14 attached to the upper part of the beam 12, and as shown in Figures 4 and 5, it comprises a device body 31 and rollers 32. The device body 31 has a guide cylinder portion 33, side plate portions 34 provided at both ends of the guide cylinder portion 33, and an axial support plate portion 35 provided on the upper part of the side plate portions 34.

[0012] The guide cylinder portion 33 has two lower side wall portions 33a, upper side wall portions 33b extending upward from the upper ends of each lower side wall portion 33a, and an upper wall portion 33c connecting the upper ends of the two upper side wall portions 33b, forming an irregularly shaped cylinder with openings on the bottom surface and both end surfaces. The two lower side wall portions 33a extend approximately parallel to each other, and the distance between them is set to a dimension slightly larger than the width of the tight frame 14. The two upper side wall portions 33b extend approximately parallel to each other, and the distance between them is set to a dimension that allows the stud bolts 14e protruding from the upper surface portion 14a of the tight frame 14 to be inserted. As is clear from the figure, a guide surface 33d facing downward is formed between the lower side wall portions 33a and the upper side wall portions 33b due to the difference in their width dimensions. The upper wall portion 33c extends upward from the upper end of the upper side wall portion 33b as it approaches the upper side wall portion 33b, and is configured to be convex upward. The distance from the guide surface 33d to the lower surface of the upper wall portion 33c is set to be slightly larger than the protruding dimension of the stud bolt 14e. The side plate portion 34 is a flat plate with a width greater than the lower side wall portion 33a and a height greater than the total height of the guide cylinder portion 33, and is provided at both ends of the guide cylinder portion 33 in a state that is approximately parallel to each other. A guide groove 34a is provided in each side plate portion 34. The guide groove 34a opens the end face of the guide cylinder portion 33 and is formed along the inner wall surfaces of the lower side wall portion 33a, the upper side wall portion 33b, and the upper wall portion 33c of the guide cylinder portion 33. The shaft support plate portion 35 is a flat plate provided so as to protrude upward from the upper end of the side plate portion 34. A shaft insertion hole 35a is formed in the central part of each of these shaft support plate portions 35 that face each other.

[0013] The roller 32 has a support shaft 32a and a cylindrical rolling portion 32b arranged on the outer circumference of the support shaft 32a. The support shaft 32a is provided so as to protrude from both ends of the rolling portion 32b, and each end is attached to the shaft support plate portion 35 with the shaft passing through the shaft insertion hole 35a. Although not explicitly shown in the figure, a one-way clutch is interposed between the support shaft 32a and the rolling portion 32b so that the rolling portion 32b can rotate in only one direction relative to the support shaft 32a.

[0014] In the lifting auxiliary device 30 configured as described above, as shown in Figures 5 and 6, if the tight frame 14 is positioned between the guide groove 34a and the lower side wall portion 33a, the roller 32 can be positioned above the stud bolts 14e of the tight frame 14, with the support shaft 32a aligned along the longitudinal direction of the tight frame 14. In this state, the guide surface 33d of the guide cylinder portion 33 abuts against the upper surface portion 14a of the tight frame 14, and the stud bolts 14e are positioned between the upper side wall portions 33b. Therefore, by moving the device body 31 along the longitudinal direction of the tight frame 14, it is possible to change the position of the roller 32 while maintaining the above state.

[0015] Figure 7 schematically shows the process of placing the corrugated sheet metal 20 onto the tight frame 14 attached to the upper surface of the beam 12 using the lifting auxiliary device 30. The following explanation of the lifting process for the corrugated sheet metal 20 will refer to this figure as appropriate.

[0016] First, before performing the work, for example, an operator 3A standing on the step ladder 2 places the auxiliary device 30 for unloading on the tight frame 14. When placing the auxiliary device 30 for unloading, in FIG. 7, the tight frame 14 may be inserted between the side plates of the device main body 31 with the roller 32 rotating only clockwise. From this state, as shown in FIG. 7(a), the end of the folding plate 20 is placed on the upper surface of the roller 32 by the operator 3B on the ground and the operator 3A standing on the step ladder 2, and the folding plate 20 is sequentially pushed up in this state. At this time, since the rotation of the roller 32 is permitted only in one direction, there is no risk that the folding plate 20 will fall down. Therefore, when pushing up the folding plate 20, only the operator 3B on the ground may perform the operation, and it is not always necessary for the operator 3A standing on the step ladder 2 to assist. After the folding plate 20 is pushed up to a certain extent, as shown in FIG. 7(b), if the operator 3A standing on the step ladder 2 passes the lower end of the folding plate 20, the folding plate 20 is arranged above the tight frame 14 at this point. At this time, since the folding plate 20 is supported by the operator 3A and the roller 32 of the auxiliary device 30 for unloading, no great burden is imposed on the operator 3A, and the folding plate 20 is also in a stable state. During this period, the operator 3B on the ground climbs onto another step ladder 2 near the rear tight frame 14, and as shown in FIG. 7(c), the folding plate 20 is supported by the two operators 3A and 3B at a position above the tight frame 14. From this state, if the operator 3A moves the auxiliary device 30 for unloading along the length of the tight frame 14, as shown in FIG. 7(d), the folding plate 20 can be placed on the tight frame 14. Thereafter, by repeating the above-described operation, the roof portion of the carport covered by the folding plate 20 at the upper part is completed.

[0017] As described above, according to the auxiliary device 30 for unloading, the situation where the operator 3 supports the folding plate 20 alone does not occur, and the folding plate 20 can be placed above the tight frame 14, which is advantageous in terms of workability. Moreover, since the position is changed by moving the device main body 31 along the length of the tight frame 14 through the guide groove 34a, the work when unloading a plurality of folding plates 20 can be efficiently carried out.

[0018] In the above-described embodiments, an auxiliary unloading device 30 for unloading the folding plate 20 onto the upper surface of the tight frame 14 in the carport is illustrated. However, the present invention is not limited to these. As long as it is for unloading a long member onto the horizontal member of the gantry, it can be applied to other things. In this case, the long member does not necessarily have to be plate-shaped, and it may be rod-shaped like building materials or pipes.

[0019] As described above, the auxiliary unloading device according to the present invention is an auxiliary unloading device applied when unloading a long member above the horizontal member in a state where the longitudinal direction intersects the horizontal member of the gantry. The device body is arranged above the horizontal member in a state where both ends and the lower surface are open through a guide groove and can move in a direction along the longitudinal direction of the horizontal member through the guide groove. It is characterized by including a roller arranged above the device body and rotatable around an axis along the longitudinal direction of the horizontal member. According to this invention, when placing the long member on the roller and moving it inward while rolling the roller as it is, so that the long member is arranged above the horizontal member, the long member can be supported by the roller and the operator, and the work can be facilitated. Moreover, since the position is changed by moving the device body along the longitudinal direction of the horizontal member through the guide groove, the work when unloading a plurality of long members can be efficiently carried out.

[0020] Further, the present invention is characterized in that, in the above-described auxiliary unloading device, the roller is only allowed to rotate in one direction. According to this invention, when moving the roller inward while rolling the roller with the long member placed on it, the reverse movement of the long member is restricted, so the workability when moving upward is improved.

[0021] Further, the present invention is characterized in that, in the above-described auxiliary unloading device, the device body has an upper wall portion covering the upper surface of the horizontal member and two side wall portions covering both side surfaces of the horizontal member, and the upper ends of the side wall portions are connected by the upper wall portion. According to this invention, the rigidity of the device body is improved, eliminating the risk of problems such as deformation of the side walls during handling. [Explanation of Symbols]

[0022] 10 Frame, 12 Beam, 14 Tight frame, 20 Corrugated plate, 30 Lifting auxiliary device, 31 Device body, 32 Roller, 33 Guide cylinder section, 33a Lower side wall section, 33b Upper side wall section, 33c Top wall section, 33d Guide surface, 34 Side plate section, 34a Guide groove

Claims

1. A lifting auxiliary device is used when lifting a long member above a horizontal member, with the horizontal member being provided on the upper surface of the beams constituting the frame, and the longitudinal side of the member intersects with the horizontal member. The device comprises a main body positioned on the upper part of the cross member, having openings at both ends and the bottom surface via guide grooves, and being movable in a direction along the longitudinal direction of the cross member via the guide grooves; and a roller positioned on the upper part of the main body and supported via a shaft support plate so as to be rotatable around an axis along the longitudinal direction of the cross member. A lifting auxiliary device characterized in that the main body of the device, including the shaft support plate portion, is configured to be narrower than the beam.

2. The lifting auxiliary device according to claim 1, characterized in that the roller is permitted to rotate only in one direction.

3. The lifting auxiliary device according to claim 1, wherein the main body of the device has an upper wall portion that covers the upper surface of the horizontal member and two side wall portions that cover both sides of the horizontal member, and the upper ends of the side wall portions are connected by the upper wall portion.

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