Lifting device

Abstract

To provide a lifting device having a rack and pinion drive system which enables significant reduction of noise during operation.SOLUTION: A lifting device includes: a rack rail R laid along a vertical direction and formed with a rack gear; at least one drive part 20 which rotationally drives a pinion gear P which engages with the rack gear; a moving part 2 which is provided with a transport space and is driven by the drive part 20 to move up or down the rack rail R; and a cover part which is fixed to the moving part 2 and formed so as to cover the drive part 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lifting device that rises and falls by its own driving force. [Background technology]

[0002] Currently, many construction elevators (lifting devices) temporarily installed at construction sites employ a mechanism for raising and lowering using a rack and pinion drive system. Lifting devices equipped with this drive system include a cage that carries workers and equipment, and the cage is supported by a lifting frame having multiple drive units. A pinion gear is attached to each of the output shafts of the multiple drive units. Each pinion gear meshes with a rack rail on which a rack gear is formed. The multiple drive units rotate and drive each pinion gear to raise and lower the lifting frame on which the cage is supported.

[0003] This lifting device can be raised and lowered by its own driving force, and the lifting range can be extended by adding rack rails in the vertical direction according to the progress of the construction. Furthermore, when adding rack rails, this lifting device can stop the lifting frame at any position by operating the braking device of the driving device. As such, the above lifting device is becoming mainstream because it has a simple and inexpensive configuration and is highly reliable. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-284179 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the above lifting device, the driving device is configured by directly attaching the pinion gear to the output shaft of the reducer. The driving device is rigidly connected to the lower part of the lifting frame. A highly accurate positional relationship is required between the pinion gear and the rack rail to ensure reliable meshing. For this reason, an adjustment roller that cooperates with the pinion gear to clamp the rack rail is disposed on the back of the rack rail on the side opposite to the surface on which the rack gear is formed, and is adjusted so that a certain amount of backlash is ensured between the pinion gear and the rack rail.

[0006] In addition, it is necessary for the pinion gears of the multiple drive units to face the rack rail in the correct direction, and the guide roller assemblies installed above and below the lifting device adjust the position of the lifting frame to accommodate this. However, there are limits to ensuring the vertical accuracy of the rack rails that are stacked in accordance with the progress of the construction work, and the positional accuracy of the cage, and it is currently not possible to achieve the order of several hundred microns that is originally required for rack and pinions.

[0007] As a result, the rack and pinion generates a loud rolling noise and also becomes a vibration source, vibrating the components via the drive shaft. The elevator is directly connected to the boarding and disembarking cage, which transmits vibrations from the vibration source. The vibrations transmitted to the cage directly lead to a deterioration in ride comfort, and the cage also radiates the vibrations. The vibrations radiated from the cage generate a loud solid-borne sound because the cage has a large radiation area.

[0008] Due to the above factors, the issue with rack and pinion drive lifting equipment is that it generates very loud noise. In the case of large construction lifting equipment, the noise level can exceed 100 dB near the inside and outside of the cage, and there is a demand for reducing the noise. It is known that rack and pinion drive lifting equipment generates loud noise due to sound sources such as the rolling sound of the rack and pinion contact parts that propagate through the air, the harmonic sound of the inverter, the hum of the drive unit caused by the vibration of the rack and pinion, and the solid-borne sound of the cage, etc.

[0009] An object of the present invention is to provide a lifting device having a rack and pinion drive system that can significantly reduce noise during operation. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, the present invention provides a lifting device that rises and falls by its own driving force, characterized in that it comprises: a rack rail laid along a vertical direction and formed with a rack gear; at least one driving unit that rotates and drives a pinion gear that meshes with the rack gear; a moving unit that is provided with a transportation space and is driven by the driving unit to raise and lower the rack rail; and a cover unit that is fixed to the moving unit and formed to cover the driving unit.

[0011] According to the present invention, the cover portion is formed so as to cover the drive portion, so that it is possible to block out motor noise, which is considered to be the most dominant type of mechanical noise generated from the drive portion during operation.

[0012] The moving unit of the present invention may include a lifting frame that runs on the rack rail, a cage that is provided on the lifting frame and has the transportation space formed therein, and a drive frame that is provided on the lifting frame and supports the drive unit, and the cover unit may include a plurality of plate-shaped members that cover each opening of a frame body that forms the drive frame.

[0013] According to the present invention, since the multiple plate-like members of the cover portion are formed so as to cover the respective openings of the frame body, the installation process onto the frame body can be simplified.

[0014] The present invention may further comprise a box member formed into a box shape by a plurality of the plate members so as to cover a part of the drive unit.

[0015] According to the present invention, it is possible to simplify the manufacturing process and installation process of the box-shaped cover member that covers the equipment even if the equipment protrudes from the opening of the frame.

[0016] The plate-like member of the present invention may include a vibration-damping plate formed into a plate shape by an elastic member.

[0017] According to the present invention, it is possible to prevent acoustic radiation from propagating to the outside from the cover portion due to vibration caused by bending of the plate-shaped vibration-damping plate in the plate-shaped member and propagating to the frame body.

[0018] The plate-shaped member of the present invention may comprise a sound-absorbing material attached to one side of the vibration-damping plate facing the drive unit, and a sound-proofing material attached to the other side of the vibration-damping plate for blocking noise.

[0019] According to the present invention, the soundproofing effect can be improved by attaching a sound absorbing material and a sound insulating material to a plate-like member close to the sound source.

[0020] The cover portion of the present invention may include a gear cover member formed so as to cover the pinion gear and the rack rail in each opening of a frame body that forms the drive frame.

[0021] According to the present invention, the gear cover member is formed to cover the pinion gear and rack rail, which are the sound sources, so that the airborne propagation of rolling noise and contact noise generated at the pinion gear and rack rail can be suppressed.

[0022] The gear cover member of the present invention may be divided along the axial direction of the rack rail.

[0023] According to the present invention, the gear cover member is divided even for narrow areas where the members near the pinion gear and rack rail are intertwined, so that the gear cover member can be easily attached without impairing workability on site.

[0024] The present invention may further comprise a shielding member that shields a gap between the divided gear cover members.

[0025] According to the present invention, by shielding the gaps in the divided gear cover members with shielding members, air transmission through the gaps of rolling noise and contact noise generated between the pinion gear and the rack rail can be further suppressed.

[0026] The present invention may further comprise a fixing member capable of freely adjusting the distance between the gear cover member and the pinion gear.

[0027] According to the present invention, by adjusting the distance between the gear cover member and the pinion gear using a fixing member, the gear cover member can be easily attached without interference from the pinion gear even in narrow areas where the pinion gear and the members near the rack rail are intertwined.

[0028] In the present invention, a joint between the cover portion and the drive frame may be filled with an elastic filler.

[0029] According to the present invention, by filling the joint between the cover portion and the drive frame with an elastic filler, it is possible to improve the airtightness of the cover portion and also to enhance soundproofing performance. Effect of the Invention

[0030] According to the present invention, the noise generated during operation of a lifting device having a rack and pinion drive system can be significantly reduced. [Brief description of the drawings]

[0031] [Figure 1] 1 is a side cross-sectional view showing an outline of the configuration of a lifting device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a rear view showing the outline of the configuration of the lifting device. [Diagram 3] FIG. 2 is a perspective view showing a configuration of a rail frame. [Figure 4] FIG. 2 is a perspective view showing a configuration of a cover portion. [Diagram 5] FIG. 2 is a perspective view showing a configuration of a cover portion. [Figure 6]FIG. 2 is a perspective view showing a configuration of a cover portion. [Figure 7] FIG. 4 is a perspective view showing the configuration of a gear cover. [Figure 8] FIG. 2 is a cross-sectional view showing a configuration of a plate-shaped member. [Figure 9] 4 is a cross-sectional view showing the attachment state of the gear cover and the plate-shaped portion. FIG. [Figure 10] 4 is a cross-sectional view showing a mounting state of the cover portion and the drive frame 5. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lifting device according to an embodiment of the present invention will now be described with reference to the drawings. The lifting device according to the embodiment is raised and lowered by its own driving force.

[0033] As shown in FIGS. 1 and 2, the lifting device 1 includes a rack rail R laid along the vertical direction and a moving unit 2 that moves along the rack rail R.

[0034] The rack rail R is fixed to a rail frame B which is fixed to a wall W of a structure or the like. For convenience, the surface viewed from the direction directly facing the wall W (the -X direction in the drawing) will be referred to as the front hereinafter. The rail frame B is formed, for example, as a frame having a truss structure extending vertically. The rail frame B is configured as modules B1 within a range of a predetermined distance in the vertical direction, and can be extended upward by adding modules B1 to the upper part.

[0035] The rear side of the rail frame B is fixed to a wall W via a fixing member K. A rack rail R is fixed to the front side of the rail frame B. A pair of guide rails G extending vertically are fixed to both side surfaces of the rail frame B. The rack rail R and the pair of guide rails G are divided into units of the same length as the module B1. The rack rail R and the pair of guide rails G are fixed to the module B1, and are added and extended upward as the module B1 is added.

[0036] As shown in Fig. 3, a rack gear R1 with spur teeth is formed on one side of the rack rail R. A pinion gear meshes with the rack gear R1 as described below. The other side of the rack rail R is formed flat. An adjust roller runs on the other side of the rack rail R as described below. The pinion gear and adjust roller support the moving part 2 and run in the vertical direction while holding the rack rail R in between.

[0037] The guide rail G is provided parallel to the rack rail R. The guide rail G is sandwiched between a plurality of guide rollers D. The plurality of guide rollers D are provided on the moving part 2 as described below, and support the moving part 2 and guide its movement in the up and down directions.

[0038] The moving unit 2 is provided with a transportation space, and is driven by a drive unit described below to move up and down the rack rail R. The moving unit 2 includes a lifting frame 3 that runs along the rack rail R. The lifting frame 3 is formed into a rectangular frame body when viewed from the front. The four corners of the lifting frame 3 include four support parts 4 that are supported by guide rails G via multiple guide rollers D.

[0039] The support unit 4 includes, for example, one guide roller D that supports the front side of the guide rail G, two guide rollers D that support the back side of the guide rail G, and one guide roller D that supports the side side of the guide rail G. The support unit 4 supports the lifting frame 3 with the four guide rollers D, and guides the up and down movement of the lifting frame 3 while clamping the guide rail G.

[0040] A cage 10 having a transportation space formed therein is fixed to the lifting frame 3. The lifting frame 3 and the cage are connected by a plurality of first fixing members E1 made of an elastic member. This prevents vibrations generated in the lifting frame 3 from being transmitted to the cage 10. The configuration of the first fixing members E1 will be described later.

[0041] The cage 10 is formed into a box-shaped frame. The walls, floor, ceiling, and door of the cage 10 are formed of gratings to reduce weight. In the lift frame 3, the lower part of the cage 10 is supported by the upper part of the support frame 3A.

[0042] The support frame 3A is formed in a box-shaped frame body that protrudes in the front direction of the lift frame 3. The cage 10 and the support frame 3A are connected by a plurality of first fixing members E1, which will be described later. This prevents vibrations generated in the lift frame 3 from being transmitted to the cage 10. A drive frame 5 that supports a drive unit 20 that raises and lowers the lift frame 3 is provided below the support frame 3A.

[0043] The drive frame 5 is fixed inside the support frame 3A at the front of the lift frame 3. The drive frame 5 is formed into a box-shaped frame. The drive frame 5 and the lift frame 3 are supported by a plurality of connecting members C, which will be described later. The connecting members C support the drive frame 5 so as to be movable within a predetermined range in the vertical direction relative to the lift frame 3. The drive frame 5 and the support frame 3A are connected by a plurality of second fixing members E2 formed of an elastic member. An upper portion of the drive frame 5 and an upper portion of the support frame 3A are connected by a plurality of second fixing members E2. A lower portion of the drive frame 5 and a lower portion of the support frame 3A are connected by a plurality of second fixing members E2.

[0044] At least one drive unit 20 is fixed inside the drive frame 5. The drive unit 20 is fixed to a plate-shaped portion 6 provided on the drive frame 5. The plate-shaped portion 6 is attached parallel to a surface directly facing the lift frame 3. Three circular holes 6H are formed in the plate-shaped portion 6 along the vertical direction. The drive unit 20 is fixed to the plate-shaped portion 6 so that the output shaft protrudes from the holes 6H.

[0045] In the drive frame 5, for example, three drive units 20 are arranged along the vertical direction. The drive units 20 include, for example, a motor 21 as a drive source. A reducer 22 that reduces the rotation speed and increases the torque to output is connected to an output shaft (not shown) of the motor 21. A pinion gear P that meshes with the rack gear R1 of the rack rail R is connected to an output shaft 23 of the reducer 22. The output shaft of the reducer 22 and the pinion gear P are connected by a joint 30 formed of an elastic member. The joint 30 will be described later.

[0046] The pinion gear P meshes with a rack gear R1 on one side surface of the rack rail R. An adjust roller J is provided adjacent to the pinion gear P on the other side surface of the rack rail R opposite to the rack gear R1.

[0047] The adjust roller J is provided to ensure backlash when the pinion gear P and the rack gear R1 mesh. The adjust roller J and the pinion gear P hold the rack rail R. When the pinion gear P is rotationally driven by the drive unit 20 and meshes with the rack gear R1 of the rack rail R to travel along the rack rail R, the adjust roller J maintains a distance from the pinion gear P to prevent the pinion gear P from deviating from the rack gear R1.

[0048] The pinion gear P and the adjust roller J are also provided on the upper part of the lifting frame 3. The pinion gear P and the adjust roller J provided on the upper part of the lifting frame 3 are not driven by the drive unit 20, but are provided to rotate freely. The pinion gear P and the adjust roller J on the upper part of the lifting frame 3 regulate the rotation of the lifting frame 3 generated by the drive torque of the pinion gear P driven by the drive unit 20.

[0049] As a result, the rotation of the lifting frame 3 generated by the driving torque of the pinion gear P is not transmitted to the multiple guide rollers D running along the guide rail G, and the moving part 2 can be lifted and lowered smoothly. With the above configuration, the driving part 20 can lift and lower along the rack rail R by driving the pinion gear P to rotate.

[0050] Next, vibration and soundproofing measures for the lifting device 1 will be described.

[0051] 4 to 6, the drive unit 20, which is the main source of noise, is covered by the cover unit 40. The cover unit 40 is formed in a shape that covers the drive unit 20. By covering the drive unit 20 with the cover unit 40, motor noise, which is considered to be the most dominant mechanical noise generated from the drive unit 20 when the lifting device 1 is in operation, is blocked.

[0052] The cover portion 40 includes a plurality of plate-like members 41-46 that cover each opening of the frame body that forms the drive frame 5. The drive frame 5 is formed in a substantially rectangular frame shape by a frame member 5A having a cross-sectional shape such as an L cross section, an H cross section, or a rectangular cross section. The drive frame 5 has a plurality of rectangular openings surrounded by the frame member 5A. The plurality of plate-like members 41-46 are formed in a rectangular plate shape to match the shape of each opening. Each plate-like member 41-46 may be appropriately divided according to the shape and number of openings in the surface direction. The plate-like members 41, 42 are formed in a rectangular plate shape to cover the side openings of the drive frame 5.

[0053] Plate-shaped member 43 is formed in a rectangular plate shape so as to cover the upper opening of drive frame 5. Plate-shaped member 44 is formed in a rectangular plate shape so as to cover the front opening of drive frame 5. Plate-shaped member 45 is formed in a rectangular plate shape so as to cover the opening on the lower surface of drive frame 5. Plate-shaped member 46 is formed in a rectangular plate shape so as to cover the opening on the back surface of drive frame 5. Since multiple plate-shaped members 41-46 are formed so as to cover each opening of the frame body of drive frame 5, the installation process on the frame body can be simplified.

[0054] At the rear surface of the drive frame 5, a part of the rear of the drive unit 20 protrudes from an opening in the frame body of the drive frame 5. At the rear surface of the drive frame 5, the cover portion 40 includes a box member 46H formed in a box shape using a plurality of plate-like members so as to cover a part of the drive unit 20 protruding from the frame body of the drive frame 5. The box member 46H is formed, for example, using plate-like members formed into five rectangular plates. The box member 46H is formed, for example, in a box shape with an opening on the front side. The box member 46H accommodates a part of the drive unit 20 protruding from the frame body of the drive frame 5 in its internal space.

[0055] According to the box member 46H, it is possible to simplify the manufacturing process and installation process for forming the box member 46H into a box shape even if there is equipment protruding from the frame body of the drive frame 5. With the above-mentioned configuration, the drive frame 5 is soundproofed by the cover part 40. The space covered by the cover part 40 is set to a covering volume that takes into consideration the heat dissipation and maintainability of the drive part 20.

[0056] A plurality of pinion gears P, a portion of the rack rail R, and a plurality of adjust rollers J protrude from the plate-shaped portion 6 on the front side of the drive frame 5. On the front side of the drive frame 5, the cover portion 40 is provided with a gear cover member 47 formed to cover the plurality of pinion gears P, a portion of the rack rail R, and a plurality of adjust rollers J. The gear cover member 47 is divided, for example, along the axial direction of the rack rail R. The gear cover member 47 is provided with, for example, a pinion gear cover 48 formed to cover the plurality of pinion gears P, and an adjust roller cover 49 formed to cover the plurality of adjust rollers J.

[0057] The pinion gear cover 48 is formed, for example, in a box shape with two orthogonal faces, the back surface and one of both side surfaces, open so as to cover the multiple pinion gears P. The adjust roller cover 49 is formed, for example, in a box shape with two orthogonal faces, the back surface and one of both side surfaces, open so as to cover the multiple adjust rollers J. The pinion gear cover 48 and the adjust roller cover 49 are fixed to the drive frame 5 so that the openings face each other.

[0058] The gear cover member 47 is formed to cover the multiple pinion gears P, part of the rack rail R, and multiple adjust rollers J, which are sound sources, and therefore can suppress the airborne propagation of rolling noise and contact noise generated in the pinion gear P, part of the rack rail R, and multiple adjust rollers J.

[0059] The gear cover member 47 is divided into a pinion gear cover 48 and an adjust roller cover 49, and therefore can be attached to the drive frame 5 without making design changes to the positional relationship and sizes of the pinion gear P, which is the driving part, part of the rack rail R, and the multiple adjust rollers J. Since the gear cover member 47 is divided into the pinion gear cover 48 and the adjust roller cover 49, it can be attached to the drive frame 5 after the moving part 2 is installed on the rail frame B.

[0060] The gear cover member 47 is divided into a pinion gear cover 48 and an adjust roller cover 49, and therefore can be easily attached without impairing workability on site, even in narrow areas where the members near the pinion gear P and the rack rail R are intertwined (see Figure 1).

[0061] 7, the pinion gear cover 48 and the adjust roller cover 49 are fixed at a distance slightly wider than the width of the rack rail R. A gap is generated between the pinion gear cover 48 and the adjust roller cover 49. The gear cover member 47 includes a shielding member 50 that is divided and disposed between the pinion gear cover 48 and the adjust roller cover 49 to shield the gap generated. The shielding member 50 is formed of, for example, a tape, a brush, or the like.

[0062] When a tape is used for the shielding member 50, it is applied so as to shield the gap after the pinion gear cover 48 and the adjust roller cover 49 are fixed to the drive frame 5. When a brush is used for the shielding member 50, the brush is provided on one or both of a pair of opposing edges of the pinion gear cover 48 and the adjust roller cover 49, and the gap is shielded after the pinion gear cover 48 and the adjust roller cover 49 are fixed to the drive frame 5.

[0063] By using the shielding member 50 to shield the gaps in the divided gear cover member 47, it is possible to suppress air transmission through the gaps of the rolling noise and contact noise generated in the pinion gear P, which is the driving part, part of the rack rail R, and multiple adjustment rollers J.

[0064] The plate-like members 41-46, the plate-like members forming the box member 46H, and the plate-like members forming the gear cover member 47 are formed, for example, of vibration-damping plates. The vibration-damping plates are formed, for example, of a plate-shaped elastic material such as butyl rubber. According to the plate-like members 41-46 and the plate-like members forming the box member 46H, when vibration is propagated to the frame body of the drive frame 5, the plate-shaped vibration-damping plates bend to absorb the vibration energy, thereby preventing acoustic radiation propagating from the cover portion 40 to the outside.

[0065] 8, each of the plate-like members 41-46, each of the plate-like members forming the box member 46H, and each of the plate-like members forming the gear cover member 47 includes a sound-absorbing material Q attached to one surface of the vibration-damping plate facing the drive unit 20, and a sound-insulating material S attached to the other surface of the vibration-damping plate for insulating noise. On one surface of each plate-like member close to a sound source such as the drive unit 20, the sound-absorbing material Q attenuates sound by converting the vibration of sound waves propagating in the air into thermal energy. The sound-absorbing material Q is formed using a material such as urethane sponge, glass wool, felt, etc.

[0066] On the other side of each plate-like member, a sound-proofing material S blocks and reflects sound waves propagating through the air, blocking noise from passing through to the outside. The sound-proofing material S is made of a high-density material such as lead. By attaching a sound-absorbing material Q and a sound-proofing material S to each plate-like member, the sound-proofing effect can be further improved.

[0067] As shown in FIG. 9, the gear cover member 47 (pinion gear cover 48) is fixed to the plate-shaped portion 6 by a fixing member L. The fixing member L is formed so as to freely adjust the distance between it and the pinion gear P. The fixing member L is, for example, a rod-shaped member formed with an L-shaped cross section. The fixing member L is fixed to the plate-shaped portion 6 along the vertical direction by welding or with bolts and nuts (not shown). The fixing member L includes a band-shaped first plate-shaped portion L1 fixed along the plate-shaped portion 6 in a plan view, and a second plate-shaped portion L2 perpendicular to the first plate-shaped portion L1.

[0068] The second plate-shaped portion L2 has an elongated hole LH formed in the horizontal direction. The fixing member and the gear cover member 47 are fixed with a bolt X and a nut Y. The gear cover member 47 can adjust the distance between the pinion gear P in the horizontal direction by moving the bolt X along the elongated hole LH of the fixing member L and fastening the nut Y to fix the gear cover member 47.

[0069] The fixing member allows the gear cover member 47 to be easily attached to a narrow portion where the pinion gear P and the members near the rack rail R are intertwined by adjusting the distance between the gear cover member 47 and the pinion gear P, without interfering with the pinion gear P. The fixing member L is illustrated for the pinion gear cover 48. The fixing member L is also used to fix the pinion gear cover 49 to the plate-shaped portion 6 in the same way as the pinion gear cover 48.

[0070] As shown in FIG. 10, the plate-shaped members 41-46 and each plate-shaped member forming the box member 46H are fixed to the frame member 5A of the drive frame 5 by the fixing member Z. The fixing member Z is, for example, a rod-shaped member formed in an L-shaped cross section. The fixing member Z is fixed to the frame member 5A along the vertical direction by welding or bolts and nuts (not shown). The fixing member Z includes a belt-shaped first plate-shaped portion Z1 fixed along the frame member 5A and a second plate-shaped portion Z2 perpendicular to the first plate-shaped portion Z1. When the fixing member Z is fixed to the frame member 5A, the second plate-shaped portion Z2 becomes a joint portion of each plate-shaped member 41-46. An elastic filler T is filled between each plate-shaped member 41-46 and the second plate-shaped portion Z2. The filler T is, for example, a hardening type silicone filler. The liquid filler T before hardening is applied to the joining surface side of the second plate-shaped portion Z2, for example, before each of the plate-shaped members 41-46 is attached.

[0071] When each plate-shaped member 41-46 is attached to the second plate-shaped portion Z2, the filler T spreads without any gaps between the second plate-shaped portion Z2 and each plate-shaped member 41-46. The protruding filler T is wiped off. After a predetermined time has passed, the filler T hardens and becomes an elastic body. That is, by filling the joint between the cover portion 40 and the drive frame 5 with an elastic filler, there is no gap between the cover portion 40 and the drive frame 5, and the cover portion 40 is tightly attached to the drive frame 5, improving the airtightness of the cover portion 40 and absorbing vibrations to improve soundproofing performance.

[0072] As described above, the lifting device 1 can significantly reduce noise by using an inexpensive and simple method of fixing the cover unit 40. The lifting device 1 simplifies the configuration used for soundproofing, thereby reducing weight increase and significantly reducing noise without significantly affecting the load weight. The lifting device 1 has a covering volume that takes into consideration the heat dissipation and maintainability of the drive unit 20. The lifting device 1 has a predetermined volume for the space covered by the cover unit 40, thereby ensuring the heat dissipation of the drive unit 20 and also ensuring maintainability.

[0073] According to the lifting device 1, the cover section 40 can be attached without making design changes to the drive frame 5, drive section 20, pinion gear P, rack rail R, adjust roller J, etc., improving workability. According to the lifting device 1, the cover section 40 can be attached with the moving section 2 installed on the rail frame B, improving workability. According to the lifting device 1, the gear cover member 47 covers and protects the drive section 20, pinion gear P, rack rail R, and adjust roller J, preventing the intrusion of foreign matter and preventing problems.

[0074] With the lifting device 1, soundproofing measures can be taken to suppress airborne sound, which is the dominant type of noise generated, and significantly reduce the overall noise level. With the lifting device 1, operational restrictions due to noise generation are eliminated, and the efficiency of material lifting and worker movement can be significantly improved. With the lifting device 1, it can operate for long periods of time by linking it with a material transport robot.

[0075] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the present invention. For example, in this embodiment, a lifting device for construction is exemplified, but the present invention is not limited to this, and may be applied to lifting devices other than construction devices and lifting devices for transporting objects other than people. In addition, the above-mentioned configuration may be applied to a moving body that uses a rack and pinion that moves horizontally and diagonally. [Explanation of symbols]

[0076] 1...lifting device, 2...moving part, 3...lifting frame, 3A...support frame, 4...support part, 5...drive frame, 5A...frame member, 6...plate-shaped part, 6H...hole, 10...cage, 20...drive part, 21...motor, 22...reduction gear, 23...output shaft, 30...joint part, 40...cover part, 41...plate-shaped member, 41-45...plate-shaped member, 41-46...plate-shaped member, 42...plate-shaped member, 43...plate-shaped member, 44...plate-shaped member, 45...plate-shaped member, 46...plate-shaped member, 46H...box member, 47...gear cover member, 48...pinion gear cover, 49...adjustable Troller cover, 50... shielding member, B... rail frame, B1... module, C... connecting member, D... guide roller, E1... first fixing member, E2... second fixing member, G... guide rail, J... adjustment roller, K... fixing member, L... fixing member, L1... first plate-shaped portion, L2... second plate-shaped portion, LH... long hole, P... pinion gear, Q... sound absorbing material, R... rack rail, R1... rack gear, S... sound insulation material, T... filling material, W... wall surface, X... bolt, Y... nut, Z... fixing member, Z1... first plate-shaped portion, Z2... second plate-shaped portion

Claims

1. a rack rail laid along a vertical direction and having a rack gear formed thereon; At least one drive unit that rotates a pinion gear that meshes with the rack gear; A moving unit that is provided with a transportation space and is driven by the driving unit to raise and lower the rack rail; a cover portion fixed to the moving portion and formed to cover the driving portion, The moving unit is A lifting frame that travels on the rack rail; a cage provided on the lifting frame and having the transportation space formed therein; a drive frame that is provided on the lifting frame and supports the drive unit, A lifting device, characterized in that the cover portion has a plurality of plate-shaped members covering each opening of a frame body that forms the drive frame.

2. a box member formed in a box shape so as to cover a part of the drive unit by a plurality of the plate-like members; A lifting device according to claim 1.

3. The plate-shaped member includes a vibration damping plate formed into a plate shape by an elastic member. A lifting device according to claim 1 or 2.

4. The plate-like member is a sound absorbing material attached to one surface of the vibration damping plate facing the drive unit; and a sound-insulating material attached to the other side of the vibration-damping plate for insulating noise. A lifting device according to claim 3.

5. The cover portion includes a gear cover member formed to cover the pinion gear and the rack rail in each opening of a frame body that forms the drive frame. A lifting device according to any one of claims 1 to 4.

6. The gear cover member is divided along the axial direction of the rack rail. A lifting device according to claim 5.

7. A shielding member is provided to shield the gap in the divided gear cover member. A lifting device according to claim 6.

8. A fixing member is provided that can adjust the distance between the gear cover member and the pinion gear. A lifting device according to any one of claims 5 to 7.

9. A joint between the cover portion and the drive frame is filled with an elastic filler. A lifting device according to any one of claims 1 to 8.

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