Lifting device

Abstract

To easily install a scaffold.SOLUTION: A lifting device (100) includes a frame (10), a lifting rail (30) into which a carriage (120) is capable of entering, a lifting body (20) elevated integrally with the lifting rail (30) and supported by a support unit (11) provided on the frame (10) in a lower position, and a scaffold (40) attached to the lifting body (20) in a detachable manner, and the scaffold (40) is mounted on the lifting body (20) in a state where one portion is engaged to one portion of the lifting body (20) so that movement in the horizontal direction is restricted.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lifting device for raising and lowering a carrier between rails arranged vertically.

Background Art

[0002] The rails for an overhead carrier may sometimes be laid out in two vertical tiers. In this case, a carrier lifter is used to move the overhead carrier back and forth between the upper rail and the lower rail. The rails for the overhead carrier are arranged near the ceiling even if they are the lower rails, and the maintenance of the carrier lifter is work at a high place.

[0003] Patent Document 1 describes a trolley lifting device in which a maintenance step is bridged over a support frame and placed thereon.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the technology described in Patent Document 1 has room for improvement in terms of easily placing the maintenance step while considering safety in the installation of the maintenance step.

[0006] One aspect of the present invention aims to realize a lifting device that can easily install a scaffold.

Means for Solving the Problems

[0007] To solve the above problems, a lifting device according to one aspect of the present invention comprises a frame, a liftable rail on which an overhead vehicle can enter, a lifting section that moves up and down integrally with the rail, and which, when in a lower position, is supported by a support section provided on the frame, and a scaffolding that is detachably placed on the lifting section, wherein the scaffolding is placed on the lifting section with a portion of it engaged with a portion of the lifting section so as to restrict its horizontal movement. [Effects of the Invention]

[0008] According to one aspect of the present invention, since the scaffolding is placed on the lifting section, it becomes possible to install the scaffolding in smaller sections, and even workers with little strength can easily install the scaffolding. [Brief explanation of the drawing]

[0009] [Figure 1] This is a front view of a lifting device according to an embodiment of the present invention. [Figure 2] This is a perspective view showing the configuration of the lifting device. [Figure 3] This diagram shows a worker standing on scaffolding installed on a lifting device. [Figure 4] This figure shows an example of the lifting mechanism of a lifting device. [Figure 5] This is a diagram showing an example of scaffolding. [Figure 6] This figure shows an example where scaffolding is placed on the lifting / lowering section. [Figure 7] This figure shows a cross-section when the line AA is cut, as shown in Figure 6. [Figure 8] This diagram shows the lifting body mounted on the frame of the lifting device. [Figure 9] This figure shows another example of scaffolding. [Figure 10] This figure shows a cross-section of a lifting platform with scaffolding placed on it. [Figure 11] This figure shows an example of a projection provided on scaffolding. [Figure 12] This figure shows yet another example of scaffolding. [Modes for carrying out the invention]

[0010] The following describes in detail one embodiment of the present invention. The lifting device 100 according to this embodiment is used to raise and lower the transport trolley 120 in the transport trolley system 1. The lifting device 100 has components such as a drive unit located in the upper part, and maintenance and other work is performed at a height. Therefore, a place where the worker S (see Figure 3) can work is required, and the lifting device 100 makes it easy to install a scaffolding 40 (see Figure 3) that serves as a workspace for the worker S.

[0011] First, the transport trolley system 1, including the lifting device 100, will be described with reference to Figure 1. Figure 1 is a diagram showing an overview of the lifting device 100, and is a front view of the lifting device 100 as seen from the front. As shown in Figure 1, the lifting device 100 is used in the transport trolley system 1, which transports goods P using a transport trolley (ceiling-mounted vehicle) 120 along a running rail 110 suspended from the ceiling or the like. More specifically, in the transport trolley system 1, the running rail 110 is arranged in two upper and lower levels, and the lifting device 100 is used to move the transport trolley 120 between these upper two levels of running rail 110.

[0012] The lifting device 100 lowers the transport trolley 120 so that it can travel along the lower rail 110B if it was traveling along the upper rail 110A, or raises the transport trolley 120 so that it can travel along the upper rail 110A if it was traveling along the lower rail 110B.

[0013] That is, the carrier cart 120 traveling on the traveling rail 110A enters the lifting rail 30 in the lifting device 100, and as the lifting body (lifting part) 20 integrated with the lifting rail 30 descends, it shifts from the traveling rail 110A to the traveling rail 110B. Also, the carrier cart 120 traveling on the traveling rail 110B enters the lifting rail 30 in the lifting device 100, and as the lifting body 20 integrated with the lifting rail 30 ascends, it shifts from the traveling rail 110B to the traveling rail 110A. The lifting rail 30 is a rail that ascends and descends integrally with the lifting body 20. In the present embodiment, the direction of the lifting rail 30 is the X direction, the direction perpendicular to the lifting rail 30 is the Y direction, and the vertical direction is the Z direction.

[0014] FIG. 2 shows the configuration of the lifting device 100. FIG. 2 is a perspective view showing an overview of the configuration of the lifting device 100. As shown in FIG. 2, as an example, in the lifting device 100, the lifting body 20 integrated with the lifting rail 30 ascends and descends within a space assembled into a substantially rectangular parallelepiped by the frame 10, thereby lifting and lowering the carrier cart 120.

[0015] FIG. 3 shows a state where a scaffold 40 is installed on the lifting body 20 and an operator S is working on the scaffold 40. Although details will be described later, in the lifting device 100 according to the present embodiment, the lifting body 20 is installed on the frame 10 of the lifting device 100, and the scaffold 40 can be placed on the lifting body 20. Then, the operator S can perform work such as maintenance of the lifting device 100 on the scaffold 40.

[0016] FIG. 4 shows the appearance of the lifting body 20. FIG. 4 is a perspective view of the lifting body 20. As shown in FIG. 4, the lifting body 20 includes two bottom portions 22 on which the lifting rails 30 are arranged, and a placement portion 23 arranged so as to straddle between the bottom portions 22 in a direction perpendicular to the extending direction of the lifting rails 30. A hole (hole portion) 21 is provided in the upper surface 231 of the placement portion 23. The hole 21 is a portion where the protrusion 41 of the scaffold 40 engages when the scaffold 40 is installed on the lifting body 20. Note that the shape does not have to penetrate the upper surface 231 of the placement portion 23 like the hole 21, and a recess may be provided in the upper surface 231. Even if it is a recess, it can engage with the protrusion 41.

[0017] Figure 5 shows the appearance of the scaffold 40. 501 in Figure 5 is a perspective view of the appearance of the scaffold 40 seen from above. As shown in 501 of Figure 5, as an example, the scaffold 40 has a plurality of substantially rectangular shelf boards 43 arranged in the short side direction (Y direction) and connected at the end portions 44 in the long side direction (X direction) to form a single plate shape. In the example shown in 501 of Figure 5, three shelf boards 43 are arranged in the short side direction to form a single scaffold 40. Further, protrusions 41 are provided on the bottom surface 42 of the end portion 44.

[0018] 502 in Figure 5 is a perspective view of the appearance of the scaffold 40 seen from below. As shown in 502 of Figure 5, protrusions 41 are provided on the bottom surface 42 of the end portion in the long side direction of the scaffold 40.

[0019] 503 in Figure 5 is a view showing an example of the protrusion 41 provided on the bottom surface of the scaffold 40. As shown in 503 of Figure 5, the protrusion 41 has a shape in which a rounded portion R is provided at the lower part, that is, at the corner on the side of the lifting body 20 when placed on the lifting body 20. The corner at the lower part of the protrusion 41 does not have a rounded portion R, but may have a tapered shape in which the area of the horizontal plane of the protrusion 41 becomes smaller as it goes lower, that is, a tapered shape in which the protrusion 41 becomes thinner as it goes to the tip. Thereby, the engagement between the protrusion 41 of the scaffold 40 and the hole 21 of the lifting body 20 can be facilitated.

[0020] Figure 6 is a perspective view showing the state where the scaffold 40 is placed on the lifting body 20. As shown in Figure 6, the scaffold 40 is placed on the upper surface of the placing portion 23 of the lifting body 20 such that the end portion 44 of the scaffold 40 is placed thereon. When the scaffold 40 is placed on the lifting body 20, the protrusion 41 provided on the end portion 44 of the scaffold 40 and the hole 21 provided on the upper surface of the placing portion 23 of the lifting body 20 are engaged. Thereby, when the scaffold 40 is placed, the scaffold 40 can be suppressed from moving in the horizontal direction with respect to the lifting body 20. The horizontal direction is a direction parallel to the horizontal plane, for example, the X direction or the Y direction.

[0021] Figure 7 shows a cross-section taken along line AA in Figure 6. As shown in Figure 7, when the scaffolding 40 is placed on the lifting body 20, the projection 41 and the hole 21 engage.

[0022] As described above, the scaffolding 40 has a projection 41 that protrudes vertically from its bottom surface 42, and the lifting body 20 has a hole 21 on its top surface 231. When the scaffolding 40 is placed on the lifting body 20, the projection 41 engages with the hole 21. This restricts the horizontal movement of the scaffolding 40. Alternatively, the upper surface 231 of the lifting body 20 may have an upwardly protruding projection, and the bottom surface 42 of the scaffolding 40 may have a hole or recess. Even with this configuration, the engagement between the projection and the hole or recess restricts the horizontal movement of the scaffolding 40 relative to the lifting body 20.

[0023] Figure 8 shows the state in which the lifting body 20 on which the scaffolding 40 is placed is installed on the lifting device 100. Figure 801 shows an example in which the lifting body 20 on which the scaffolding 40 is placed is positioned on the lifting device 100, and Figure 802 is an enlarged view of the X portion of 801.

[0024] As shown in Figure 8, 802, the lifting body 20 is positioned within the space formed by the frame 10 of the lifting device 100, with the end portion 232 of the mounting portion 23 being supported by support portions 11 provided on the frame 10 of the lifting device 100. The support portions 11 may be provided, for example, at the four corners of the lifting body 20 in the horizontal plane, or in addition to the four corners, they may also be provided in the approximate center portion in the longitudinal direction (X direction) of the lifting body 20.

[0025] The lifting body 20 cannot move below the position supported by the support part 11. Therefore, it can be said that the support part 11 positions the lifting body 20 at a lower position. In other words, the support part 11 is provided at a position that is below the lifting body 20.

[0026] The support sections 11 provided at the four corners may, for example, have wall surfaces 111 whose cross-section when cut in a horizontal plane is L-shaped (see 803 in Figure 8). The L-shaped portion restricts the horizontal movement of the end 232 of the mounting section 23, thereby stably supporting the lifting body 20.

[0027] Furthermore, the support portion 11 may be inclined such that the wall surface 111 is inclined inward towards the space formed by the frame 10 as it extends downward (in the -Z direction). By inclining the wall surface 111 inward, the support portion 11 can position the lower position of the lifting body 20 and also position the horizontal position of the lifting body 20.

[0028] As described above, the lifting device 100 according to this embodiment comprises a frame 10, a lifting rail 30 that can be raised and lowered and on which a transport trolley 120 can enter, a lifting body 20, and a scaffolding 40. The lifting body 20 moves up and down together with the lifting rail 30 and, when in the lower position, is supported by a support part 11 provided on the frame 10. The scaffolding 40 is detachably mounted on the lifting body 20. The scaffolding 40 is mounted on the lifting body 20 with a projection 41, which is part of the scaffolding 40, engaged with a hole 21, which is part of the lifting body 20, so that horizontal movement of the scaffolding 40 is restricted.

[0029] The scaffolding 40 can be installed simply by placing it on the lifting body 20, making installation easy. Furthermore, the scaffolding 40 can be divided into smaller sections, allowing even workers S with limited strength to install it easily. In addition, since the lifting body 20 on which the scaffolding 40 is placed is supported by the frame 10, the load from the worker S standing on the scaffolding 40 is not applied to the lifting rail 30, thus preventing deformation and damage to the lifting rail 30.

[0030] Furthermore, since the scaffolding 40 and the lifting body 20 are engaged and mounted on the frame 10 in such a way that the horizontal movement of the scaffolding 40 is restricted, it is possible to prevent the scaffolding 40 from moving horizontally. This enhances the safety of the scaffolding 40.

[0031] [Example 1 of scaffolding 40] Figure 9 shows a modified version of scaffolding 40, called scaffolding 40'. 901 in Figure 9 is a perspective view of scaffolding 40'. 902 in Figure 9 shows scaffolding 40' divided into scaffolding 40'A and scaffolding 40'B. As shown in 902, scaffolding 40' differs from the aforementioned scaffolding 40 in that it can be divided into two parts.

[0032] As an example, the scaffolding 40' is made up of multiple roughly rectangular shelves 43' arranged in the short direction (Y direction) and connected at the ends 44' in the long direction (X direction) to form a single plate shape. In the example shown at 901 in Figure 9, two shelves 43' are arranged in the short direction to form scaffolding 40'A and scaffolding 40'B, and scaffolding 40'A and scaffolding 40'B are combined to form scaffolding 40'. In addition, protrusions 41' are provided on the bottom surface 42' of the respective ends 44' of scaffolding 40'A and scaffolding 40'B.

[0033] By making the scaffolding 40' divisible into two parts, scaffolding 40'A and scaffolding 40'B, the weight can be reduced compared to a single scaffolding 40', thereby reducing the burden on worker S when placing the scaffolding 40' on it.

[0034] Figure 10 shows a longitudinal cross-section of the scaffolding 40', and 1002 shows a transverse cross-section in the transverse direction. The longitudinal cross-section is the same for both scaffolding 40'A and scaffolding 40'B. As shown in 1001 of Figure 10, both scaffolding 40'A and scaffolding 40'B have a projection 41' on the bottom surface 42' of the longitudinal end 44'.

[0035] Furthermore, as shown in 1002 of Figure 10, projections 41' are provided on both scaffolding 40'A and scaffolding 40'B.

[0036] Figure 11 shows an example of the projection 41'. As shown in Figure 11, the projection 41' has a roughly rectangular shape with the horizontal plane elongated in the X direction. In addition, the lower corners are rounded (R).

[0037] By providing holes in the lifting body 20 that correspond to the protrusions 41', the protrusions 41' of the scaffolding 40' and the holes in the lifting body 20 can be engaged, allowing the scaffolding 40' to be placed on the lifting body 20.

[0038] [Modification of scaffolding 40, part 2] Figure 12 shows a modified scaffolding 40X, which is a modified version of scaffolding 40. Figure 1201 is a perspective view of scaffolding 40X. Figure 1202 shows an example of a lifting body 20X on which scaffolding 40X is placed. As shown in Figure 1201, scaffolding 40X is divided into scaffolding 40Xa and scaffolding 40Xb in a direction perpendicular to the rail direction of the lifting rail 30 (Y direction).

[0039] By making scaffolding 40X divisible into two parts, scaffolding 40Xa and scaffolding 40Xb, the weight can be reduced compared to a single scaffolding 40X, thereby reducing the burden on worker S when placing scaffolding 40X on it.

[0040] Furthermore, the lifting body 20X has mounting sections 23 not only at its ends in the X direction but also approximately in the center. By providing mounting sections 23 approximately in the center of the lifting body 20X in the X direction, mounting sections 23 are also provided at the ends of the scaffolding 40X in the X direction, allowing the scaffolding 40X to be stably mounted.

[0041] In conventional technology, scaffolding is arranged to span across frames, and if the scaffolding is divided perpendicular to the rails, that is, if the dividing line is perpendicular to the rails, it becomes impossible to support the scaffolding. Therefore, in conventional technology, the idea of ​​dividing the scaffolding perpendicular to the rails could not even be conceived. In this embodiment, as described above, since the scaffolding 40 is mounted on the lifting body 20 rather than the frame 10, by providing a mounting section 23 on the lifting body 20, the scaffolding 40X can be divided into scaffolding 40Xa and scaffolding 40Xb in a direction perpendicular to the rail direction (Y direction) of the lifting rail 30.

[0042] [Regulatory Department] The configuration may include a restricting mechanism that restricts the raising and lowering of the lifting body 20 only when the scaffolding 40 is placed on the lifting body 20. Since the scaffolding 40 is used for maintenance of the lifting device 100, when the scaffolding 40 is placed on it, it is highly likely that the lifting device 100 is undergoing maintenance, or immediately before or after such maintenance. Therefore, it is dangerous if the lifting device 100 operates, i.e., the lifting body 20 rises or falls, when the scaffolding 40 is placed on it. Thus, the configuration may include a restricting mechanism that restricts the raising and lowering of the lifting body 20 when the scaffolding 40 is placed on it, and does not affect the raising and lowering of the lifting body 20 when the scaffolding 40 is not placed on it.

[0043] The restricting mechanism can be implemented in any way that restricts the raising and lowering of the lifting body 20 when the scaffolding 40 is placed, and does not affect the raising and lowering of the lifting body 20 when the scaffolding 40 is removed. For example, it may be a structure that locks the lifting body 20 and the frame 10 when the scaffolding 40 is placed.

[0044] 〔summary〕 A lifting device according to embodiment 1 of the present invention comprises a frame, a rail that can be raised and lowered and on which an overhead vehicle can enter, a lifting section that moves up and down integrally with the rail, and which, when in a lower position, is supported by a support section provided on the frame, and a scaffold that is detachably placed on the lifting section, wherein the scaffold is placed on the lifting section with a portion of it engaged with a portion of the lifting section so as to restrict its horizontal movement.

[0045] According to the above configuration, the scaffolding can be installed simply by placing it on the lifting body, making installation easy. Furthermore, the scaffolding can be divided into smaller sections, allowing even workers with less strength to install it easily. In addition, since the lifting body on which the scaffolding is placed is supported by a frame, the load from workers standing on the scaffolding does not apply to the rails, thus preventing deformation and damage to the rails.

[0046] Furthermore, since the scaffolding and the lifting mechanism are engaged and mounted on the frame in a manner that restricts the horizontal movement of the scaffolding, it is possible to prevent the scaffolding from moving horizontally. This enhances the safety of the scaffolding.

[0047] In the lifting device according to embodiment 2 of the present invention, in embodiment 1, the scaffolding is provided with a projection that protrudes vertically from its bottom surface, and the lifting unit is provided with a hole on its upper surface, and when the scaffolding is placed on the frame, the projection engages with the hole.

[0048] According to the above configuration, the horizontal movement of the scaffolding can be restricted by the engagement between the protrusions of the scaffolding and the holes in the lifting section.

[0049] In the lifting device according to embodiment 3 of the present invention, in embodiment 1 or 2, the tip of the projection has a shape in which the area of ​​the horizontal cross-section decreases as it approaches the lifting part.

[0050] According to the above configuration, engagement between the protrusions of the scaffolding and the holes in the lifting section becomes easier.

[0051] In any of the embodiments 1 to 3, the lifting device according to embodiment 4 of the present invention comprises a wall surface having an L-shaped horizontal cross-section.

[0052] According to the above configuration, horizontal displacement can be suppressed when the lifting mechanism is in the lower position.

[0053] In the lifting device according to embodiment 5 of the present invention, in embodiment 4, the wall surface is inclined toward the internal space formed by the frame as it extends downward.

[0054] According to the above configuration, the lifting mechanism can be supported at a predetermined position by the inclination of the wall surface, so the horizontal position of the lifting mechanism can be positioned at an appropriate location.

[0055] In the lifting device according to embodiment 6 of the present invention, in embodiment 4 or 5, the support portion is provided at a position below the lifting portion.

[0056] According to the above configuration, the lower position of the lifting mechanism can be appropriately positioned.

[0057] The lifting device according to embodiment 7 of the present invention includes a restricting unit that restricts the raising and lowering of the lifting unit only when the scaffolding is placed on the lifting unit, in any of embodiments 1 to 6.

[0058] According to the above configuration, it is possible to prevent the lifting mechanism from moving up or down while the scaffolding is in place.

[0059] In the lifting device according to embodiment 8 of the present invention, in any of embodiments 1 to 7, the scaffolding can be divided into multiple parts along the rail direction of the rail.

[0060] According to the above configuration, since the scaffolding can be divided into multiple sections, it is possible to easily install the scaffolding compared to when the scaffolding is formed as a single unit.

[0061] In the lifting device according to embodiment 9 of the present invention, in any of embodiments 1 to 7, the scaffolding can be divided into multiple parts along a direction perpendicular to the rail direction of the rail.

[0062] According to the above configuration, since the scaffolding can be divided into multiple sections, it is possible to easily install the scaffolding compared to when the scaffolding is formed as a single unit.

[0063] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of Symbols]

[0064] 1. Transport Cart System 10 frames 11 Support part 111 Wall surface 20, 20X Lifting mechanism (lifting section) 21 hole (hole) 22 Bottom 23 Mounting section 231 Top surface 232 End 30 Lifting rails (rails) 40, 40', 40X scaffolding 41, 41' protrusion (protrusion) 42, 42' bottom 43, 43' shelf board 44, 44' end 100 Lifting device 110, 110A, 110B running rails 120 Transport Cart

Claims

1. Frame and, A rail that can be raised and lowered, allowing overhead vehicles to enter, A lifting section that moves up and down integrally with the rail, and when in the lower position, the lifting section is supported by a support provided on the frame, The system includes a scaffold that is detachably mounted on the lifting section, The scaffolding is placed on the lifting section such that a portion of it is engaged with a portion of the lifting section, so that its horizontal movement is restricted. moreover, The scaffolding is provided with a projection on its bottom surface that protrudes vertically, The lifting mechanism has a hole on its upper surface, A lifting device in which the projection engages with the hole when the scaffolding is placed on the lifting section.

2. The lifting device according to claim 1, wherein the tip of the projection has a shape in which the area of ​​the horizontal cross-section decreases as it approaches the lifting section.

3. The lifting device according to claim 1, wherein the support portion comprises a wall surface having an L-shaped cross-section in the horizontal direction.

4. The lifting device according to claim 3, wherein the wall surface is inclined inward towards the space formed by the frame as it extends downward.

5. The lifting device according to claim 3, wherein the support portion is provided at a position below the lifting portion.

6. The lifting device according to claim 1, further comprising a restricting unit that restricts the lifting of the lifting unit only when the scaffolding is placed on the lifting unit.

7. The lifting device according to claim 1, wherein the scaffolding can be divided into multiple parts along the rail direction of the rail.

8. The lifting device according to claim 1, wherein the scaffolding can be divided into a plurality of parts along a direction perpendicular to the rail direction of the rail.

9. A frame and, A rail that can be raised and lowered, allowing overhead vehicles to enter, A lifting section that moves up and down integrally with the rail, and when in the lower position, the lifting section is supported by a support provided on the frame, The system includes a scaffold that is detachably mounted on the lifting section, The scaffolding is placed on the lifting section such that a portion of it is engaged with a portion of the lifting section, so that its horizontal movement is restricted. The support portion comprises a wall surface having an L-shaped cross-section in the horizontal direction. A lifting device in which the aforementioned wall surface is inclined inward towards the space formed by the frame as it extends downward.

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