Lifting and lowering apparatus

Abstract

The present invention relates to a lifting and lowering device, and more specifically, to a lifting and lowering device that achieves stable lifting and lowering operation.

Description

Technology Field

[0001] The present invention relates to a lifting and lowering device, and more specifically, to a lifting and lowering device that achieves stable lifting and lowering operation. Background Technology

[0002] Medical beds may be equipped with lifting and lowering functions to vary the patient's posture and position. To prevent patient discomfort and pain during the lifting and lowering process, the lifting and lowering movements must be achieved stably. Prior art literature

[0003] Published Patent No. 10-2013-0023947 The problem to be solved

[0004] The present invention has been devised to solve the aforementioned problems, and the objective of the present invention is to provide a lifting and lowering device that achieves stable lifting and lowering operation. means of solving the problem

[0005] A lifting and lowering device according to one embodiment of the present invention comprises: a base frame having a mounting space; a lifting body disposed on the base frame; and a lifting module disposed within the mounting space; wherein the lifting module comprises a driving module that provides power and a carrier module operated by the driving module, the carrier module comprises a carrier block, and the carrier block varies in position along a first direction by the operation of the driving module, and the lifting body comprises a side body having a guide slope on its bottom surface, the guide slope is located on the carrier block and is displaced in an up-and-down direction by the displacement of the carrier block.

[0006] According to one embodiment, the carrier module includes a first carrier module and a second carrier module, and the side body includes a first side body located on the first carrier module and a second side body located on the second carrier module, and when the drive module is operated, the displacement amount of the first side body and the displacement amount of the second side body are the same.

[0007] According to one embodiment, when the driving module is operated, the displacement amount of the carrier block of the first carrier module and the displacement amount of the carrier block of the second carrier module are distributed equally.

[0008] According to one embodiment, the first carrier module and the second carrier module are each symmetrically arranged on both sides of the drive module in the first direction with respect to the drive module, and the first side body and the second side body are symmetrical to each other in the first direction with respect to the drive module.

[0009] According to one embodiment, the carrier module further includes a screw rod that extends along the first direction, has a male screw on its outer surface, and has one end connected to the drive module, and the carrier block includes a screw hole having a female screw portion, and the screw rod is screw-connected within the screw hole, and when the drive module operates, the screw rod rotates and the carrier block is displaced along the first direction.

[0010] According to one embodiment, the carrier module includes a first carrier module and a second carrier module, and the first carrier module and the second carrier module are symmetrically arranged on both sides of the drive module in the first direction with respect to the drive module, and the power provided by the drive module is equally distributed between the amount of rotation of the screw rod of the first carrier module and the amount of rotation of the screw rod of the second carrier module.

[0011] According to one embodiment, the drive module includes a power device that provides rotational force, and a gearbox connected to the power device and connected to the carrier module, wherein the gearbox distributes the rotational force of the power device such that the amount of rotation of the screw rod of the first carrier module and the amount of rotation of the screw rod of the second carrier module are equal.

[0012] According to one embodiment, the power device provides a first rotational force, wherein the first rotational force has a rotational center axis extending in a direction orthogonal to the first direction, and the gearbox converts the first rotational force provided by the power device into a second rotational force having a rotational center axis extending in the first direction and transmits it to the first carrier module and the second carrier module.

[0013] According to one embodiment, the carrier block includes a driving wheel provided at the bottom and supporting the carrier block.

[0014] According to one embodiment, the base frame includes a guide rail that extends in the first direction and guides the driving of the driving wheel.

[0015] According to one embodiment, the carrier block includes a lifting wheel provided on the upper part and supporting the guide slope.

[0016] According to one embodiment, the base frame includes a rotatable support link, the carrier block includes a side arm, the support link includes a first link arm and a second link arm, the first link arm is positioned on the movement path of the side arm, and when the side arm pushes the first link arm, the support link rotates so that the end of the second link arm supports the lower part of the lifting body.

[0017] According to one embodiment, the support link includes a pivot axis located between the first link arm and the second link arm, and the first link arm and the second link arm extend at a predetermined angle from each other.

[0018] According to one embodiment, the support link further includes a support wheel provided at the end of the second link arm.

[0019] According to one embodiment, the base frame includes a guide panel having a guide line formed thereon, and the support link further includes a guide portion, wherein the guide portion is located on the guide line and is guided along the guide line. Effects of the invention

[0020] The lifting and lowering device according to an embodiment of the present invention can achieve stable lifting and lowering operation.

[0021] The lifting and lowering device according to an embodiment of the present invention can stably support the lifting body in a lifted state. Brief explanation of the drawing

[0022] FIG. 1 is a drawing showing a lifting and lowering device according to one embodiment of the present invention. FIG. 2 is a diagram showing the disassembled structure of a lifting and lowering device according to one embodiment of the present invention. FIG. 3 is a drawing showing a base frame included in a lifting / lowering device according to one embodiment of the present invention. Figure 4 is an enlarged view of a part of the base frame of Figure 3. FIGS. 5 to 7 are drawings showing a lifting body included in a lifting and lowering device according to an embodiment of the present invention, each shown from a different direction. FIG. 8 is a drawing showing a lifting module included in a lifting device according to one embodiment of the present invention. FIG. 9 is an exploded view showing the structure of a carrier module included in a lifting / lowering device according to one embodiment of the present invention. FIG. 10 is a diagram showing the coupling structure of a lifting and lowering device according to one embodiment of the present invention. FIG. 11 is a drawing showing the first operating state of a lifting and lowering device according to one embodiment of the present invention. FIG. 12 is a cross-sectional view of a first operating state of a lifting / lowering device according to an embodiment of the present invention. FIG. 13 is an enlarged view of a part of the first operating state of a lifting / lowering device according to one embodiment of the present invention. FIG. 14 is a drawing showing the second operating state of a lifting / lowering device according to one embodiment of the present invention. FIG. 15 is an enlarged view of a part of the second operating state of a lifting / lowering device according to one embodiment of the present invention. Specific details for implementing the invention

[0023] Hereinafter, a preferred embodiment according to the present invention will be described with reference to the attached drawings.

[0025] Hereinafter, preferred embodiments according to the present invention will be described with reference to the attached drawings. In the following description, "first direction," "second direction," and "third direction" refer to the X-axis, Y-axis, and Z-axis directions of FIG. 1. According to one example, "first direction," "second direction," and "third direction" may each represent "left and right," "front and back," and "up and down" directions.

[0026] FIG. 1 is a drawing showing a lifting / lowering device (1) according to one embodiment of the present invention. FIG. 2 is a drawing showing the disassembled structure of a lifting / lowering device (1) according to one embodiment of the present invention.

[0027] A lifting / lowering device (1) according to one embodiment of the present invention may include a base frame (100), a lifting body (200), and a lifting module (300).

[0029] <Base Frame (100)>

[0030] FIG. 3 is a drawing showing a base frame (100) included in a lifting / lowering device (1) according to an embodiment of the present invention. FIG. 4 is an enlarged drawing showing a part of the base frame (100) of FIG. 3. CL of FIG. 3 is a central axis (CL) of the base frame (100) and may be a virtual axis passing through the center of the first direction and the second direction of the base frame (100).

[0031] The base frame (100) may include a frame body (110), a mounting space (120), a guide rail (130), a support link (140), and a guide panel (150).

[0032] The frame body (110) may be composed of a combination of a plurality of bars and panels. The frame body (110) may be composed of a frame having a mounting space (120) on the inside. The frame body (110) may have a cuboid shape having a predetermined width in the first direction, the second direction, and the third direction overall.

[0033] A mounting space (120) is formed within the frame body (110). The mounting space (120) may be a cuboid-shaped space having a predetermined width in a first direction, a second direction, and a third direction. The mounting space (120) may be open to at least one side of the third direction. A lifting module (300) may be mounted within the mounting space (120).

[0034] The guide rail (130) can be placed within the mounting space (120). The guide rail (130) can be extended in a first direction with a predetermined length. The guide rail (130) can guide the movement of the carrier block (340) included in the lifting module (300).

[0035] According to an embodiment, a plurality of guide rails (130) may be provided. The plurality of guide rails (130) may have a symmetrical arrangement in a first direction and a second direction with respect to a central axis (CL). Specifically, as shown in FIG. 3, the guide rail (130) may include a first guide rail (130-1) and a second guide rail (130-2). The first guide rail (130-1) and the second guide rail (130-2) may have a symmetrical arrangement in the first direction. Additionally, as shown in FIG. 4, the guide rail (130) may include a front guide rail (130a) and a rear guide rail (130b). The front guide rail (130a) and the rear guide rail (130b) may have a symmetrical arrangement with respect to each other in the second direction.

[0036] The support link (140) may include a first link arm (141) and a second link arm (142). The first link arm (141) and the second link arm (142) may each be composed of a bar having a predetermined length. The first link arm (141) and the second link arm (142) may be extended with a predetermined angle between them.

[0037] The support link (140) may be provided with a pivot axis (143). According to an embodiment, the pivot axis (143) may be provided at a position where the first link arm (141) and the second link arm (142) are connected to each other. The pivot axis (143) may be extended along a second direction.

[0038] The support link (140) may be provided with a guide portion (144). According to an embodiment, the guide portion (144) may be provided on one side of the second direction of the second link arm (142).

[0039] The support link (140) may be provided with a support wheel (145). According to an embodiment, the support wheel (145) may be provided at the end of the second link.

[0040] The support link (140) can be rotatably connected to the base frame (100). According to an embodiment, the pivot axis (143) can be rotatably connected to the base frame (100). The support link (140) can rotate around the pivot axis (143).

[0041] The self-weight of the second link arm (142) and the support wheel (145) may be greater than the self-weight of the first link arm (141). Therefore, in the absence of external force, the second link arm (142) of the support link (140) can be placed on the frame body (110) and maintained in a lying state. In addition, the first link arm (141) of the support link (140) can be maintained in a rising state with a predetermined angle with respect to the horizontal plane.

[0042] Support links (140) are provided in multiple numbers and may have a symmetrical arrangement in a first direction and a second direction with respect to a central axis (CL). Specifically, as shown in FIG. 3, the support links (140) may include a first support link (140-1) and a second support link (140-2). The first support link (140-1) and the second support link (140-2) may have a symmetrical arrangement in the first direction. Additionally, as shown in FIG. 4, the support links (140) may include a front support link (140a) and a rear support link (140b). The front support link (140a) and the rear support link (140b) may have a symmetrical arrangement with respect to each other in the second direction.

[0043] According to an embodiment, the base frame (100) may further include a guide panel (150). The guide panel (150) may be provided on a second directional side of the base frame (100). The guide panel (150) may have a guide line (152). The guide line (152) may have an arc shape having a central angle of a predetermined size. A guide portion (144) provided on the support link (140) may be located within the guide line (152). The displacement of the guide portion (144) may be guided along the guide line (152). When the support link (140) rotates around a rotation axis (143), the guide portion (144) may be guided within the guide line (152).

[0044] A plurality of guide panels (150) are provided and may have a symmetrical arrangement in a first direction and a second direction with respect to a central axis (CL). Specifically, the guide panels (150) may include a first guide panel (150-1) and a second guide panel (150-2). The first guide panel (150-1) and the second guide panel (150-2) may have a symmetrical arrangement in the first direction. Additionally, the guide panels (150) may include a front guide panel (150a) and a rear guide panel (150b). The front guide panel (150a) and the rear guide panel (150b) may have a symmetrical arrangement with respect to each other in the second direction.

[0046] Lifting Body (200)

[0047] FIGS. 5 to 7 are drawings showing a lifting body (200) included in a lifting / lowering device (1) according to an embodiment of the present invention, each from a different direction. CL in FIGS. 5 and 6 is the central axis (CL) of the lifting body (200) and may be a virtual axis passing through the center of the first direction and the center of the second direction of the base frame (100).

[0048] The lifting body (200) may include a top body (210) and a side body (220).

[0049] The top body (210) may be composed of a panel having a predetermined area. The top body (210) may have a panel shape having a predetermined width in a first direction and a second direction, and a predetermined thickness in a third direction. A predetermined member and structure may be positioned on the top body (210).

[0050] The side body (220) may be positioned below the top body (210). The side body (220) may have a panel shape having a predetermined width in the second direction and a predetermined thickness in the second direction.

[0051] The side body (220) may be provided with a guide slope (222) at its lower portion. The guide slope (222) may be composed of a surface having a predetermined angle of inclination. The guide slope (222) may be composed of a downwardly inclined surface in a direction spaced apart from the central axis (CL). According to one example, an embodiment is possible in which the lower portion of a panel constituting the side body (220) is bent to provide the guide slope (222), but is not limited thereto.

[0052] A plurality of side bodies (220) are provided and may have a symmetrical arrangement in a first direction and a second direction with respect to a central axis (CL). Specifically, the side body (220) may include a first side body (220-1) and a second side body (220-2). The first side body (220-1) and the second side body (220-2) may have a symmetrical arrangement in the first direction. Additionally, the side body (220) may include a front side body (220a) and a rear side body (220b). The front side body (220a) and the rear side body (220b) may have a symmetrical arrangement with respect to each other in the second direction.

[0053] The guide slopes (222) provided in the first side body (220-1) and the second side body (220-2), respectively, may be symmetrical to each other in a first direction with respect to the central axis (CL). Specifically, as shown in FIG. 7, the guide slopes (222) provided in the first side body (220-1) and the second side body (220-2), respectively, extend along virtual lines L1 and L2, and L1 and L2 may be symmetrical to each other in a first direction with respect to the central axis (CL). The angle (θ1) between the central axis (CL) and L1 and the angle (θ2) between the central axis (CL) and L2 may be the same.

[0054] By having the above configuration, the side body (220) may have a first end (224) and a second end (226) in a first direction. The first end (224) may be a part of the side body (220) with a narrow width in the third direction and may be a part close to the central axis (CL). The second end (226) may be a part of the side body (220) with a wide width in the third direction and may be a part spaced apart from the central axis (CL).

[0055] The guide slopes (222) provided in the front side body (220a) and the rear side body (220b), respectively, may be symmetrical to each other in a second direction with respect to the central axis (CL). Specifically, the guide slopes (222) provided in the front side body (220a) and the rear side body (220b), respectively, constituting the first side body (220-1), may extend along a virtual line L1. The guide slopes (222) provided in the front side body (220a) and the rear side body (220b), respectively, constituting the second side body (220-2), may extend along a virtual line L2.

[0057] <Lifting Module (300)>

[0058] FIG. 8 is a drawing showing a lifting module (300) included in a lifting / lowering device (1) according to an embodiment of the present invention. FIG. 9 is an exploded view showing the structure of a carrier module (304) included in a lifting / lowering device (1) according to an embodiment of the present invention. CL in FIG. 8 is the central axis (CL) of the lifting module (300) and may be a virtual axis passing through the center of the first direction of the lifting module (300).

[0059] The lifting module (300) may include a driving module (302) and a carrier module (304).

[0060] The drive module (302) may be a device that receives power from an external source and provides rotational force to the carrier module (304). Specifically, the drive module (302) may generate a first rotational force (R1) that rotates around an axis (CLA) extending along a second direction.

[0061] According to an embodiment, the drive module (302) may include a power device (310) and a gearbox (320).

[0062] The power device (310) is a device capable of generating power. For example, the power device (310) may be a servo motor. According to an embodiment, the power device (310) may provide a first rotational force (R1) that rotates around an axis extending along a second direction.

[0063] The gearbox (320) may be a component with a gear device built inside. The gearbox (320) may be a device that converts and distributes the direction of rotational force of the power device (310). The gearbox (320) may convert a first rotational force (R1) provided by the power device (310) into a second rotational force (R2) centered on an axis (CLB) extending along the first direction. The second rotational force may be provided to both sides of the gearbox (320) in the first direction.

[0064] According to an embodiment, the gearbox (320) can distribute the first rotational force (R1) equally. That is, when a first rotational force (R1) of a predetermined size is provided, the second-1 rotational force (R2-1), which is the rotational force provided to one side of the first direction, and the second-2 rotational force (R2-2), which is the rotational force provided to the other side of the first direction, can be the same.

[0065] The specific configuration of the above gearbox (320) is not limited. For example, it may include a bevel gear connected to the power device (310).

[0066] The carrier module (304) may include a first carrier module (304-1) and a second carrier module (304-2). The first carrier module (304-1) and the second carrier module (304-2) may have a symmetrical arrangement on both sides in a first direction centered on the central axis (CL). Alternatively, the first carrier module (304-1) and the second carrier module (304-2) may have a symmetrical arrangement on both sides in a first direction centered on the drive module (302). The first carrier module (304-1) and the second carrier module (304-2) may have the same configuration as each other. Therefore, in the following description, the description regarding the first carrier module (304-1) and the second carrier module (304-2) will be unified and described as the carrier module (304).

[0067] The carrier module (304) may include a screw rod (330) and a carrier block (340).

[0068] The screw rod (330) may be a rod that extends with a predetermined length in a first direction. One end of the screw rod (330) may be connected to the drive module (302). A male screw thread may be formed on the outer surface of the screw rod (330). One end of the screw rod (330) may be connected to the gear box (320). When the second rotational force is provided through the gear box (320), the screw rod (330) may rotate around a rotation axis (CLB) that extends in a direction parallel to the first direction.

[0069] The carrier block (340) may include a block body (341), a driving wheel (342), a lifting wheel (343), a side arm (344), and a screw connection hole (345).

[0070] The block body (341) can form the body of the carrier block (340).

[0071] The driving wheel (342) may be located at the bottom of the block body (341). The driving wheel (342) may be composed of a freely rotatable wheel. When an external force is applied to the block body (341), the block body (341) may be driven by the driving wheel (342) while supported on the driving wheel (342).

[0072] The lifting wheel (343) may be located on the upper part of the block body (341). The lifting wheel (343) may be composed of a freely rotatable wheel.

[0073] The side arm (344) is provided on the side of the block body (341) and may be a beam extending in a second direction.

[0074] The screw connection hole (345) is formed in the block body (341) and may be a hole penetrating in a first direction. A female screw thread may be formed on the inner surface of the screw connection hole (345).

[0075] The carrier block (340) can be connected to the screw rod (330). Specifically, the screw rod (330) is inserted into the screw connection hole (345), and the male threaded portion of the screw rod (330) and the female threaded portion within the screw connection hole (345) can be screw-connected to each other. When the screw rod (330) rotates around a rotation axis, the carrier block (340) can be displaced in a first direction.

[0076] According to an embodiment, when a first rotational force of a predetermined size is provided, the rotational force provided to one side of the first direction (second-1 rotational force (R2-1)) and the rotational force provided to the other side of the first direction (second-2 rotational force (R2-2)) may be the same. According to an embodiment, regarding the operation of the drive module (302), the amount of rotation of the screw rod (330) of the first carrier module (304-1) and the amount of rotation of the screw rod (330) of the second carrier module (304-2) may be the same. In addition, the amount of displacement (C1) in the first direction of the carrier block (340) of the first carrier module (304-1) and the amount of displacement (C2) in the first direction of the carrier block (340) of the second carrier module (304-2) may be the same and may be in opposite directions. That is, the displacement of the first carrier block (340) and the displacement of the second carrier block (340) caused by the operation of the drive module (302) may be symmetric to each other in the first direction with respect to the central axis (CL).

[0078] <Combination Relationship>

[0079] FIG. 10 is a diagram showing the combined structure of a lifting / lowering device (1) according to one embodiment of the present invention.

[0080] The lifting module (300) can be placed within the mounting space (120) of the base frame (100).

[0081] The guide rail (130) of the base frame (100) and the driving wheel (342) of the lifting module (300) may be located on the same straight line extending along a third direction. The driving of the driving wheel (342) may be guided by the guide rail (130). Thus, the carrier block (340) may drive in a first direction along the guide rail (130).

[0082] The lifting body (200) can be positioned on the lifting module (300).

[0083] The lifting body (200) can be supported by the lifting wheel (343) of the lifting module (300). Specifically, the lifting wheel (343) and the side body (220) of the lifting body (200) can be located on the same straight line extending along a third direction. Specifically, the bottom surface of the side body (220) can be located on the lifting wheel (343) of the lifting module (300). Accordingly, a guide slope (222) provided on the bottom surface of the side body (220) can be located on the lifting wheel (343). According to one example, depending on the position of the carrier block (340), the lifting wheel (343) may be positioned below the top body (210) and away from the position where the side body (220) is located.

[0084] The central axis (CL) of the base frame (100), the central axis (CL) of the lifting body (200), and the central axis (CL) of the lifting module (300) may be located on the same line as each other.

[0085] Meanwhile, although not shown, a certain sensor capable of detecting the operation of the lifting module (300) and controlling the operation may be provided within the base frame (100).

[0086] For example, a specific sensor (not shown) located on the movement path of the carrier block (340) may be provided at a position within the base frame (100). The sensor (not shown) may generate a specific electrical signal when the carrier block (340) is located at a specific position. The electrical signal may control the operation of the drive module (302). Thus, when the carrier block (340) reaches a specific position, operation control such as stopping the operation of the drive module (302) or reducing the operating speed may be performed. To this end, a specific control unit (not shown) that receives the electrical signal and generates an operation signal may be provided.

[0088] Operation of the lifting / lowering device (1)

[0089] FIG. 11 is a drawing showing a first operating state of a lifting / lowering device (1) according to an embodiment of the present invention. FIG. 12 is a drawing showing a cross-section of the first operating state of a lifting / lowering device (1) according to an embodiment of the present invention. FIG. 13 is a drawing showing an enlarged view of a part of the first operating state of a lifting / lowering device (1) according to an embodiment of the present invention. FIG. 14 is a drawing showing a second operating state of a lifting / lowering device (1) according to an embodiment of the present invention. FIG. 15 is a drawing showing an enlarged view of a part of the second operating state of a lifting / lowering device (1) according to an embodiment of the present invention.

[0090] The operation of the lifting and lowering device (1) will be explained below with reference to FIGS. 11 to 15.

[0091] The lifting / lowering device (1) according to the embodiment may have a first operating state and a second operating state. The first operating state is a state in which the lifting body (200) is lowered. The second operating state is a state in which the lifting body (200) is raised. The lifting body (200) may vary its position in a third direction between the first operating state and the second operating state.

[0092] The first operating state is described as follows.

[0093] In the first operating state, the carrier block (340) is positioned close to the drive module (302) in the first direction. That is, the distance between the carrier block (340) and the drive module (302) is relatively small. Accordingly, the lifting wheel (343) may be positioned at the first end (224) of the side body (220), or at a position close to the first end (224) of the side body (220), or at a position away from the side body (220).

[0094] Accordingly, the lifting body (200) is positioned in a lowered position in the third direction.

[0095] In the second operating state, the carrier block (340) is positioned spaced apart from the drive module (302) in the first direction. That is, the distance between the carrier block (340) and the drive module (302) is relatively large. Accordingly, the lifting wheel (343) may be located at the second end (226) of the side body (220) or at a position close to the second end (226) of the side body (220).

[0096] Accordingly, the lifting body (200) is positioned in a raised position in the third direction.

[0097] As described above, the third directional positional movement of the lifting body (200) between the first operating state and the second operating state can be achieved by the operation of the lifting module (300).

[0098] That is, as the carrier block (340) included in the lifting module (300) moves in a first direction, the position where the lifting wheel (343) included in the carrier block (340) supports the guide slope (222) can be varied in a third direction. Accordingly, the lifting body (200) supported on the lifting wheel (343) can move in a third direction.

[0099] Specifically, when the carrier block (340) moves from the first end (224) of the side body (220) toward the second end (226), the lifting block can rise in the third direction. That is, it can operate from the first operating state to the second operating state.

[0100] Conversely, if the carrier block (340) moves from the second end (226) of the side body (220) toward the first end (224), the lifting block can descend in the third direction. That is, it can operate from the second operating state to the first operating state.

[0101] According to an embodiment, the lifting module (300) includes a drive module (302) positioned at the center in a first direction, and a first carrier module (304-1) and a second carrier module (304-2) positioned symmetrically on both sides in a first direction with respect to the drive module (302). The first carrier module (304-1) and the second carrier module (304-2) each include a screw rod (330) and a carrier block (340) connected to the screw module. The drive module (302) can provide the same rotational force to the screw rod (330) included in the first carrier module (304-1) and the second carrier module (304-2).

[0102] Accordingly, the amount of rotation of the screw rod (330) included in the first carrier module (304-1) and the second carrier module (304-2) is the same, and the amount of displacement of the carrier block (340) of the first carrier module (304-1) and the amount of displacement of the carrier block (340) of the second carrier module (304-2) may be the same. The first carrier block (340) and the second carrier block (340) may operate symmetrically in the first direction with respect to the drive module (302). That is, when the drive module (302) operates, the amount of positional displacement of the first carrier block (340) and the amount of positional displacement of the second carrier block (340) are the same, and the direction of positional movement may be symmetrical with respect to the drive module (302). Accordingly, the displacement amount in the third direction of the first side body (220-1) located on the lifting wheel (343) of the first carrier block (340) and the second side body (220-2) located on the lifting wheel (343) of the second carrier block (340) may be equal to each other. Accordingly, during the operation process between the first operating state and the second operating state as described above, the lifting body (200) can stably move its position in the third direction. That is, the lifting and lowering of the lifting body (200) can be stably performed.

[0104] Operation of the support link (140)

[0105] Below, the operation of the support link (140) will be described with reference again to FIGS. 11 to 15. In the following description, the first operating state and the second operating state are the same as those defined in the above description.

[0106] According to an embodiment, the base frame (100) includes a support link (140), and in the second operating state, the lifting body (200) can be stably supported by the support link (140).

[0107] The specific operation of the support link (140) is described as follows.

[0108] As illustrated in FIGS. 11 to 13, in the first operating state, the side arm (344) provided on the carrier block (340) is spaced apart from the support link (140) and does not apply an external force to the support link (140). Accordingly, the second link arm (142) of the support link (140) remains lying on the frame body (110). In addition, the first link arm (141) of the support link (140) remains in a rising state with a predetermined angle with respect to the horizontal plane.

[0109] In the process of transitioning from the first operating state to the second operating state, the carrier block (340) moves in the first direction as indicated by arrow L. Specifically, it moves from a position close to the drive module (302) to a position separated from it. At this time, the side arm (344) provided on the carrier block (340) also moves simultaneously. During this process, the lifting body (200) also rises as indicated by arrow V.

[0110] The first link arm (141) in the upright state is located on the movement path of the side arm (344). When the side arm (344) pushes the first link arm (141) in the upright state in the first direction, the support link (140) rotates around the rotation axis (143) as shown by the arrow R. Accordingly, the first link arm (141) is switched to a lying state by the side arm (344), and the second link arm (142) is switched to a rising state.

[0111] As the second link arm (142) is in an upright state, the end of the second link arm (142) can come into contact with the bottom surface of the lifting body (200). According to an embodiment, a support wheel (145) provided at the end of the second link arm (142) can support the bottom surface of the lifting body (200).

[0112] When switching from the second operating state to the first operating state, the pushing of the support link (140) by the side arm (344) is released. Accordingly, the support link (140) is again switched to a lying state where the second link arm (142) is placed on the frame body (110), and the first link arm (141) is switched to a rising state with a predetermined angle with respect to the horizontal plane.

[0113] As described above, the support link (140) operates in conjunction with the operation of the lifting module (300) and can support the bottom surface of the lifting body (200) in the second operating state. Therefore, in the second operating state, the lifting body (200) can stably maintain its position and posture while in a raised state.

[0114] When switching from the second operating state to the first operating state, interference of the side arm (344) with respect to the support link (140) is eliminated. Accordingly, the first link arm (141) is restored to an upright state, and the second link arm (142) is restored to a lying state.

[0116] <Effects according to the example>

[0117] According to the embodiment, the lifting body (200) can be stably raised and lowered. In addition, when the lifting body (200) is in a raised state, it can be supported by the support link (140) to maintain a stable position.

[0118] Therefore, stable lifting and lowering and support can be achieved for a predetermined support located on the lifting body (200).

[0119] For example, when the lifting / lowering device (1) according to the embodiment is used in a hospital heater, bedding, etc., the change in posture and body support of a patient, etc. placed on the lifting / lowering device (1) can be stably achieved.

[0121] Although preferred embodiments have been illustrated and described above, the present invention is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the invention as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention. Explanation of the symbols

[0122] 1: Lifting and lowering device 100: Base Frame 110: Frame body 120: Mount space 130: Guide rail 130-1: First guide rail 130-2: Second guide rail 130a: Front guide rail 130b: Rear guide rail 140: Support Link 140-1: 1st Support Link 140-2: Second Support Link 140a: Front support link 140b: Rear support link 141: 1st Link Arm 142: 2nd Link Arm 143: Meeting Axis 144: Guide Section 145: Support Wheel 150: Guide Panel 152: Guidelines 200: Lifting Body 210: Top Body 220: Side body 220-1: 1st Side Body 220-2: Second Side Body 220a: Front side body 220b: Rear side body 222: Guide Slope 224: First section 226: Second part 300: Lifting Module 302: Drive Module 304: Carrier Module 304-1: 1st Carrier Module 304-2: Second Carrier Module 310: Power unit 320: Gearbox 330: Screw bar 340: Carrier Block 341: Block Body 342: Driving Wheel 343: Lifting Wheel 344: Side Arm 345: Screw connection hole

Claims

Claim 1 A lifting and lowering device comprising: a base frame having a mounting space; a lifting body disposed on the base frame; and a lifting module disposed within the mounting space; wherein the lifting module includes a drive module that provides power and a carrier module operated by the drive module; wherein the carrier module includes a carrier block, and the carrier block is positionally variable along a first direction by the operation of the drive module; wherein the lifting body includes a side body having a guide slope on its bottom surface, the guide slope is located on the carrier block and is displaced in an up-and-down direction by the displacement of the carrier block; wherein the carrier module includes a first carrier module and a second carrier module; wherein the side body includes a first side body located on the first carrier module and a second side body located on the second carrier module; and wherein, when the drive module is operated, the displacement amount of the first side body and the displacement amount of the second side body are the same. Claim 2 delete Claim 3 A lifting and lowering device according to claim 1, wherein when the driving module is operated, the displacement amount of the carrier block of the first carrier module and the displacement amount of the carrier block of the second carrier module are equally distributed. Claim 4 A lifting and lowering device according to claim 1, wherein the first carrier module and the second carrier module are each symmetrically arranged on both sides of the drive module in the first direction with respect to the drive module, and the first side body and the second side body are symmetrical to each other in the first direction with respect to the drive module. Claim 5 A lifting and lowering device according to claim 1, wherein the carrier module further comprises a screw rod that extends along the first direction, has a male screw on its outer surface, and has one end connected to the driving module, and the carrier block comprises a screw hole having a female screw portion, wherein the screw rod is screw-connected within the screw hole, and when the driving module is operated, the screw rod rotates and the carrier block is displaced along the first direction. Claim 6 In claim 5, the carrier module includes a first carrier module and a second carrier module, and the first carrier module and the second carrier module are each symmetrically arranged on both sides of the drive module in the first direction with the drive module as the center, and the power provided by the drive module is equally distributed between the amount of rotation of the screw rod of the first carrier module and the amount of rotation of the screw rod of the second carrier module. Claim 7 ◈Claim 7 was abandoned upon payment of the registration fee.◈ In claim 6, the drive module comprises a power device providing rotational force, and a gearbox connected to the power device and connected to the carrier module, wherein the gearbox is a lifting / lowering device that distributes the rotational force of the power device such that the amount of rotation of the screw rod of the first carrier module and the amount of rotation of the screw rod of the second carrier module are equal. Claim 8 ◈Claim 8 was abandoned upon payment of the registration fee.◈ In claim 7, the power device provides a first rotational force, wherein the first rotational force has a rotational center axis extending in a direction orthogonal to the first direction, and the gearbox is a lifting / lowering device that converts the first rotational force provided by the power device into a second rotational force having a rotational center axis extending in the first direction and transmits it to the first carrier module and the second carrier module. Claim 9 In claim 1, the carrier block is a lifting / lowering device comprising a driving wheel that is provided at the bottom and supports the carrier block. Claim 10 In claim 9, the base frame is a lifting / lowering device that includes a guide rail extending in the first direction and guiding the driving of the driving wheel. Claim 11 In claim 1, the carrier block is a lifting device comprising a lifting wheel provided on the upper part and supporting the guide slope. Claim 12 A lifting and lowering device according to claim 1, wherein the base frame includes a rotatable support link, the carrier block includes a side arm, the support link includes a first link arm and a second link arm, the first link arm is positioned on the movement path of the side arm, and when the side arm pushes the first link arm, the support link rotates so that the end of the second link arm supports the lower part of the lifting body. Claim 13 In claim 12, the support link comprises a pivot axis located between the first link arm and the second link arm, and the first link arm and the second link arm extend at a predetermined angle from each other, forming a lifting / lowering device. Claim 14 In claim 12, the support link further comprises a support wheel provided at the end of the second link arm. Claim 15 ◈Claim 15 was abandoned upon payment of the registration fee.◈ In claim 12, the base frame comprises a guide panel having a guide line formed therein, and the support link further comprises a guide portion, and the guide portion is located on the guide line and is a lifting / lowering device guided along the guide line.

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