Elevating / lowering device

Abstract

To provide an elevating / lowering device capable of securing stability in an earthquake regardless of being a simple facility and also achieving smooth elevating / lowering.SOLUTION: An elevating / lowering device 1 includes: a pair of opposing elevating / lowering guide parts; an elevating / lowering floor part 20 to be moved by elevating / lowering in an elevating / lowering direction DL along the elevating / lowering guide parts; and a pair of hoist parts 30, 30 connected to end parts of the elevating / lowering parts. The elevating / lowering guide parts are fixed to oppositely arranged walls 101a, 101b. The elevating / lowering floor part 20 includes a bed body 28 on which a person can lies. When the hoist parts 30 are operated, the elevating / lowering floor part 20 is guided by the elevating / lowering guide parts in a movement direction so as to be moved by elevating / lowering in the elevating / lowering direction DL.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lifting device capable of carrying luggage. [Background technology]

[0002] In urban homes and shelters, people are often forced to live in small spaces, and the demand for facilities that can use the space more efficiently is increasing. In other words, there is a strong need for more efficient use of space.

[0003] Patent Document 1 discloses a lift bed that includes a bed body with a pair of sliding rails offset from the center of gravity, rail guides for holding the sliding rails so that they can move up and down, load-bearing columns equipped with stoppers for determining the lower end position of the bed body, and weights connected via wires and pulleys to offset the load of the bed body, with the end of the wires being engaged at a position between the center of gravity and the sliding rails. The weight of the weight is set to 80% to 100% of the total weight of the bed body and the sliding rails. The lift bed disclosed in this patent document has a simple structure, a small number of parts, and can be provided at low cost, can be raised and lowered in a few seconds using only human power, and can be installed not only in concrete houses but also in wooden houses and rental houses that are subject to restrictions such as the inability to install screws.

[0004] Patent Document 2 discloses a lift bed that allows the bed base to be raised and lowered freely along multiple upright guide rails, and is equipped with a constant-force spring that incorporates a spirally wound steel strip and can always apply a constant spring force by changing the spring constant in proportion to the unwound length of the steel strip, with one end of the steel strip connected to the bed base so that the steel strip is wound and unwound as the bed base is raised and lowered. The lift bed disclosed in this patent document has a simple lifting device structure, can be manufactured inexpensively, and can make effective use of indoor space. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3188239 [Patent Document 2] Japanese Utility Model Application Publication No. 5-37165 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the inventions proposed in Patent Documents 1 and 2 are cantilever-type lift beds, so the deflection at the tip of the bed body is greater than that at the base of the support, which may hinder comfortable sleep. In addition, since a large force acts on the cantilever, there are concerns about its strength. In addition, since the bed body shakes significantly up and down and left and right during an earthquake, the possibility of a sleeper being thrown off the bed body cannot be denied.

[0007] Furthermore, the invention proposed in Patent Document 1 has the problem that the weight for balancing the weight occupies a certain amount of space, and no significant space saving can be expected. Also, the invention proposed in Patent Document 2 has the problem that it is difficult to synchronize the operation of the hoisting mechanisms provided separately on the left and right sides to raise and lower the vehicle.

[0008] The present invention has been made in consideration of these problems, and aims to provide an elevator that can ensure stability during an earthquake despite being a simple installation, and that allows smooth elevation and descent. [Means for solving the problem]

[0009] The invention for solving the above problem is a lifting device comprising a pair of opposing lifting guide sections, a lifting floor section that can be raised and lowered along the lifting guide sections with luggage loaded thereon, and a pair of hoist sections connected to each of the opposing ends of the lifting floor section to raise and lower the lifting floor section, wherein the lifting guide sections have at least two guide rails arranged at a predetermined interval in a first direction and extending in the lifting direction, the guide rails are fixed to a wall, and the lifting floor section has wheel sections that roll on the guide rails.

[0010] According to this configuration, the lifting device includes a pair of opposing lifting guides and a lifting floor that can move up and down along the lifting guides with a load on it, and the lifting guides have at least two guide rails that are arranged at a predetermined interval in the first direction and extend in the lifting direction, so that the lifting floor can move up and down in the lifting direction while maintaining its posture. In addition, the guide rails are fixed to the wall, so that they have excellent strength and can ensure durability and stability, especially during earthquakes.

[0011] Preferably, each of the wheel portions rolling on the at least two guide rails is connected to each other via a first frame extending in a first direction, and a pair of the first frames arranged opposite each other are connected to each other via a second frame extending in a second direction perpendicular to the short side direction.

[0012] According to this configuration, each of the wheel units rolling on at least two guide rails is connected to each other via a first frame extending in a first direction, and a pair of the opposing first frames are connected to each other via a second frame extending in a second direction that is perpendicular to the short side direction, so that the wheel units can be firmly connected via the first and second frames.

[0013] Preferably, the hoist unit has a pair of sheaves attached to the first frame at a predetermined interval, and a winch capable of winding and unwinding the wire while fixed to the ceiling, and an end of the wire is fixed to the ceiling and accommodated in the winch via the lower ends of the pair of sheaves.

[0014] According to this configuration, the hoist section constitutes a movable pulley, so that the load on the winch required for raising and lowering the lifting floor section can be reduced.

[0015] Preferably, the sheave is disposed between the wall and the first frame.

[0016] According to this configuration, the sheave is disposed in the gap between the wall and the first frame, thereby making it possible to reduce the space required for the facility.

[0017] According to this configuration, the guide rail has a pair of opposing flanges, and the wheel portion has a first wheel and a second wheel located below the first wheel and moving up and down in sync with the first wheel, and the first wheel rolls in contact with one of the flanges, and the second wheel rolls in contact with the other flange.

[0018] Preferably, the pair of flanges are opposed to each other along the first direction.

[0019] With this configuration, the first wheel rolls on one of the flanges along the first direction, and the second wheel rolls on one of the flanges along the first direction, making it possible to move up and down while maintaining a stable posture of the lifting floor section.

[0020] Preferably, the guide rail is fitted with a descent limiting section which limits the downward movement of the lifting floor section, and when the lifting floor section reaches the lowermost position, the lifting floor section and the descent limiting section are fitted into each other.

[0021] According to this configuration, the guide rail is fitted with a descent limiting section that limits the downward movement of the lifting floor section, and when the lifting floor section reaches the lowermost position, the lifting floor section and the descent limiting section are fitted into each other, so that displacement of the lifting floor section in the first and second directions is strongly restricted at the lowermost position.

[0022] Preferably, the guide rail is fitted with an ascent limiting section which limits the upward movement of the lifting floor section, and when the lifting floor section reaches its upper limit position, the lifting floor section and the ascent limiting section are fitted into each other.

[0023] According to this configuration, the guide rail is fitted with an ascent limiting section that limits the upward movement of the lifting floor section, and when the lifting floor section reaches the upper limit position, the lifting floor section and the ascent limiting section are fitted into each other, so that displacement of the lifting floor section in the first and second directions is strongly suppressed at the upper limit position.

[0024] Preferably, the liftable floor section has a bed body on which the user can lie down.

[0025] According to this configuration, the lifting floor section has a bed body on which the user can lie down, so the lifting device can be effectively used as a bed that can be installed in living spaces where space saving is required, or in the evacuation space of a shelter. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 is a front cross-sectional view of a lifting device installed in an underground shelter. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 4 is a partial cross-sectional side view illustrating the arrangement of a first wheel and a second wheel. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] This is a modified example of the hoist section. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, an embodiment of a lifting device 1 of the present invention will be described in detail with reference to Figs.

[0028] As shown in Figures 1 and 2, the lifting device 1 includes a pair of opposing lifting guides 10, a lifting floor 20 that can move up and down in the lifting direction DL along the lifting guides 10, and a pair of hoist units 30 connected to the ends of the lifting guides 10. The lifting guides 10 are fixed to opposing walls 101a, 101b. The lifting floor 20 has a bed body 28 on which the user can lie. When the hoist unit 30 is operated, the lifting floor 20 is guided in the moving direction by the lifting guides 10 and moves up and down in the lifting direction DL.

[0029] The lifting device 1 is installed in the indoor space of the shelter 100, but is not limited thereto. It may be installed in a residence. Also, the shelter 100 is a so-called underground shelter, which is provided partially or entirely underground 120, but it may be a shelter provided above ground.

[0030] The lift guide unit 10 is composed of two guide rails 50, 60 extending in the lift direction DL. The two guide rails 50, 60 are arranged at a predetermined interval in the first direction D1 and fixed to the wall 101a. The guide rails 50, 60 form a pair, one guide rail 50, 60 is fixed to the wall 101a, and the other guide rail 50, 60 is fixed to the wall 101b facing the wall 101a. In this embodiment, the number of guide rails is two, but is not limited to this. It is sufficient that there are more than one guide rail, and there may be three or more guide rails.

[0031] The wheel parts 70a, 70b that roll on the guide rails 50, 60 as described later are connected to each other via a first frame 21 extending in a first direction D1. The first frames 21 are paired and are provided opposite each other. The pair of first frames 21, 21 are connected via a second frame 22 extending in a second direction D2. The first frame 21 and the second frame 22 are rigidly connected to each other and form a ladder shape. Here, the first direction D1 is a direction along the wall 101a or the wall 101b, and the second direction D2 is a direction perpendicular to the first direction D1. The lifting direction DL is a direction perpendicular to the first direction D1 and the second direction D2.

[0032] The bed body 28 is fixed to the second frame 22 in a detachable state. The shape of the bed body 28 is preferably large enough to allow evacuees to lie down and sleep. It is also preferable that the bed body 28 is lightweight and foldable. In this embodiment, the shape is determined on the assumption that evacuees will lie down along the second direction D2, but this is not limited to this. The shape may also be determined on the assumption that evacuees will lie down along the first direction D1. In addition, if the distance between the opposing walls 101a, 101b is wide, the shape may be such that two or more people can lie down in a row.

[0033] It is preferable that the bed body 28 can maintain a horizontal position at the lowest position, so that a comfortable sleep can be ensured by lying down on the bed body 28.

[0034] A storage section 29 capable of storing luggage (not shown) to be loaded is provided below the bed body 28. The storage section 29 is preferably at a height such that it does not come into contact with the floor 103 when the lift-up floor section 20 reaches its lowest position, and at a height such that a person can walk directly below the lift-up floor section 20 when the lift-up floor section 20 reaches its highest position. The luggage may be loaded onto the bed body 28. In this case, it is preferable that the luggage has a shape such that it does not come into contact with the ceiling 102 when the lift-up floor section 20 reaches its highest position.

[0035] The hoist unit 30 has a pair of sheaves 31, 31, and a winch 32 that can wind and unwind a wire 33. The sheave 31 is a disk-shaped member that can rotate about an axis, and the axis is fixed to the second frame 22 at a predetermined interval. The sheave 31 is disposed in a gap generated between the wall 101a and the second frame 22.

[0036] The winch 32 is fixed to the ceiling 102. One end of the wire 33 is fixed to the ceiling 102 and is stored in the winch 32 via the lower ends of a pair of sheaves 31, 31. In other words, the sheave 31 and the winch 32 form a movable pulley. When the winch 32 is operated to wind up the wire 33, the sheave 31 moves upward while rotating. The lifting floor section 20 to which the sheave 31 is rotatably fixed moves upward and downward in synchronization with the sheave 31. The moving direction is limited to the lifting direction DL by the lifting guide section 10.

[0037] 3 and 4, the guide rails 50 and 60 are fixed to the walls 101a and 101b, and extend along the lifting direction DL. The guide rail 50 is a groove-shaped member in cross section, and has a first flange 51 and a second flange 52 that face each other. The first flange 51 and the second flange 52 are connected via a web 53. The second flange 52 is fixed to the wall 101a. The guide rail 60, and the first flange 61, the second flange 62, and the web 63 that constitute the guide rail 60, have substantially the same configuration as the guide rail 50, the first flange 51, the second flange 52, and the web 53, and therefore will not be described.

[0038] The wheel section 70a that rolls on the guide rail 50 has a first wheel 71a and a second wheel 72a. The first wheel 71a and the second wheel 72a are fixed to the first frame 21 and are structured to be rotatable around a rotation axis. The first wheel 71a rolls on the first flange 51, and the second wheel 72a located below the first wheel 71a rolls on the second flange 52.

[0039] The wheel section 70b that rolls on the guide rail 60 has a first wheel 71b and a second wheel 72b. The first wheel 71b and the second wheel 72b are fixed to the first frame 21 and are structured to be rotatable around their respective rotation axes. The first wheel 71b rolls on the first flange 61, and the second wheel 72b located below the first wheel 71b rolls on the second flange 62.

[0040] The first frame 21 connects the first wheels 71a, 71b and the second wheels 72a, 72b, and the opposing first frames 21, 21 are connected via the second frame 22, thereby stabilizing the posture of the lift floor section 20 when it moves up and down.

[0041] The mechanism by which the lift floor section 20 moves up and down in the lift direction DL while maintaining its posture will be described with reference to FIGS.

[0042] When the lift-and-lower floor section 20 attempts to displace from the wall 101a to the wall 101b, the first wheels 71a, 71b are pressed against the first flanges 51, 61, and the second wheels 72a, 72b are pressed against the second flanges 52, 62, so that a force acts on the lift-and-lower floor section 20 to displace it from the wall 101b to the wall 101a. This causes the lift-and-lower floor section 20 to return to its original position.

[0043] Similarly, when the lift-up floor section 20 tries to displace from the wall 101b to the wall 101a, a force that tries to displace the lift-up floor section 20 in the direction from the wall 101a to the wall 101b acts on the lift-up floor section 20. This causes the lift-up floor section 20 to return to its original position.

[0044] As shown in Fig. 5, a descent limiting portion 15a is attached to the lower end of the guide rail 50. Similarly, a descent limiting portion 15b is attached to the lower end of the guide rail 60. The descent limiting portion 15a protrudes from the first flange 51 of the guide rail 50 toward the opposing wall 101b. The descent limiting portion 15b protrudes from the first flange 61 of the guide rail 60 toward the opposing wall 101b. The descent limiting portions 15a and 15b are provided with convex portions 16a and 16b. The heights of the convex portions 16a and 16b from the floor 103 are set to be the same.

[0045] The lower end of the first frame 21 is fitted with abutment parts 76a, 76b, which are provided with recesses 77a, 77b corresponding to the protrusions 16a, 16b. The descent limiting parts 15a, 15b come into contact with the abutment parts 76a, 76b, restricting the descent movement of the lift floor part 20, and the lift movement part reaches the lowest position. At the same time, the protrusions 16a, 16b and the recesses 77a, 77b are loosely fitted together. This restricts the movement of the lift floor part 20 in the first direction D1 and the second direction D2.

[0046] For example, if evacuees take refuge in a shelter after an earthquake, there is a high possibility that aftershocks will occur, which may cause the lift floor unit 20 to shake or break, but this can be avoided by loosely fitting the protrusions 16a, 16b and the recesses 77a, 77b together. This allows evacuees to sleep in the bed body 28 in peace.

[0047] 6, an ascent limiter 17a is attached to the upper end of guide rail 50. Similarly, an ascent limiter 17b is attached to the upper end of guide rail 60. As the structure of ascent limiters 17a and 17b is almost the same as that of the descent limiter, a description thereof will be omitted.

[0048] The second frame 22 is provided at both ends with abutment parts 78a, 78b, which are provided with recesses 79a, 79b corresponding to the protrusions 18a, 18b. The abutment of the abutment parts 78a, 78b with the rise limiting parts 17a, 17b restricts the upward movement of the lift floor part 20, and the lift movement part reaches the upper limit position. At the same time, the protrusions 18a, 18b and the recesses 79a, 79b are loosely fitted together. This restricts the movement of the lift floor part 20 in the first direction D1 and the second direction D2.

[0049] This embodiment is merely an example, and may be modified without departing from the technical spirit of the present invention. For example, as shown in Fig. 7, the hoist unit 230 may be provided with a fixed sheave 231 fixed to the wall 201. In this case, the force required to raise and lower the lift floor unit 20 can be reduced by half compared to the hoist unit 30 of this embodiment. [Industrial Applicability]

[0050] As described above, the lifting device according to the present invention can be used as a lifting bed installed in a shelter, and can also be used for loading and unloading in factories and as equipment for raising and lowering floors in homes to change their height. In this way, the wide range of applications makes it highly applicable in industry. [Explanation of symbols]

[0051] 1: Lifting device 10: Lifting guide section 15a, 15b: Descent limiting section 16a, 16b: lift limiter 20: Lifting floor section 21: First frame 22: Second frame 28: Bed body 30: Guide rail part 30 31: Sheaves 32: Winch 33: Wire 50, 60: Guide rail 51,61: First flange 52,62: Second flange 70a, 70b: Wheel part 71a, 71b: 1st wheel 72a, 72b: 2nd wheel 101a, 101b: Wall 102: Ceiling 103:Floor D1: 1st direction D2 :Second direction DL: Lift / lower direction

Claims

1. A pair of opposing lift guide parts; a lifting floor section that can move up and down along the lifting guide section with luggage loaded thereon; A pair of hoist units connected to the opposing ends of the lifting floor unit to lift and move the lifting floor unit, A lifting device characterized in that the lifting guide section has at least two guide rails arranged at a predetermined interval in a first direction and extending in the lifting direction, the guide rails are fixed to a wall, and the lifting floor section has wheel sections that roll on the guide rails.

2. The lifting device described in claim 1, characterized in that each of the wheel portions rolling on at least two guide rails is connected to each other via a first frame extending in a first direction, and a pair of the first frames arranged opposite each other are connected to each other via a second frame extending in a second direction that is perpendicular to the first direction.

3. The lifting device described in claim 2, characterized in that the hoist section has a pair of sheaves attached to the first frame at a predetermined interval and a winch that can wind and rewind a wire while fixed to the ceiling, and an end of the wire is fixed to the ceiling and accommodated in the winch via the lower ends of the pair of sheaves.

4. The lifting device according to claim 3 , wherein the sheave is disposed between the wall and the first frame.

5. The guide rail has a pair of opposing flanges, the wheel unit includes a first wheel and a second wheel that is located below the first wheel and moves up and down in synchronization with the first wheel, 2. The lifting device according to claim 1, wherein the first wheel rolls in contact with one of the pair of flanges, and the second wheel rolls in contact with the other of the pair of flanges.

6. The lifting device according to claim 5 , wherein the pair of flanges face each other along the first direction.

7. The guide rail is provided with a descent limiting portion that limits the descent movement of the lift floor portion, 2. The lifting device according to claim 1, wherein when the lifting floor portion reaches the lower limit position, the lifting floor portion and the descent limiting portion are fitted into each other.

8. The guide rail is provided with an elevation limiting portion that limits the elevation movement of the lift floor portion, 2. The lifting device according to claim 1, wherein when the lifting floor portion reaches an upper limit position, the lifting floor portion and the rise limiting portion are fitted into each other.

9. 9. The lifting device according to claim 1, wherein the lifting floor portion has a bed body on which a user can lie down.

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