JP7472370B2 - Bed Equipment - Google Patents

Description

The present invention relates to a bed device.

Conventionally, for example in hospitals and ordinary homes, bed devices with a bed that can be raised and lowered freely have been used for medical treatment, recuperation, and nursing care. For example, Patent Documents 1 and 2 disclose a bed device that includes a lifting frame that supports the bed, a base frame that is placed on the installation floor, and an X-link mechanism that connects the lifting frame and the base frame so that the lifting frame can be raised and lowered freely. The X-link mechanism has a structure that includes rod-shaped first and second link members, and a connecting pin that connects the first and second link members so that they can be rotated in an X shape.

JP 2009-207642 A JP 2009-207643 A

In the bed device as described above, for example, an abutment portion made of resin or the like is provided on the peripheral surface of the first link member, and when the bed is lowered to the lowest position, the abutment portion abuts against the second link member from below, thereby improving the stability of the bed at its lowest position. With this configuration, when the bed is at its lowest position, the abutment portion is sandwiched between the first link member and the second link member from above and below.

In recent years, however, there has been a demand for a lower bed with a lowered bed position. To achieve a lower bed position using an X-link mechanism, the first and second link members must be brought closer to a horizontal position than before. However, in a structure in which the contact portion is sandwiched between the first and second link members at the lowermost position as described above, the contact portion gets in the way, making it difficult to bring the first and second link members into a more horizontal position, and the bed cannot be lowered sufficiently. In a bed device in which the bed can be raised and lowered, the mechanism for connecting the lift frame and the base frame so that the bed can be raised and lowered is not limited to the X-link mechanism. However, any lift connection mechanism may be considered to be an obstacle to a lower bed position if the components of the lift connection mechanism come into contact with each other at the lowermost position of the bed.

Furthermore, to achieve a lower floor, it is necessary to make the components of the lifting and lowering linkage even smaller. This reduces the rigidity of the lifting and lowering linkage, and it is possible that it may become slightly more flexible than before. If the components of the X-linkage become more flexible in this way and the bed is made lower, depending on the usage conditions, the bed may come into contact with the installation floor, causing discomfort to the user.

In order to prevent the bed from coming into contact with the floor on which it is placed, it is also possible to provide a support frame that supports the lifting frame from below, and have the support frame abut against the base frame when the bed is at its lowest position. However, in this case, the bed would be placed higher by the height of the support frame, which would prevent the bed from being placed on a lower floor.

The present invention was made in consideration of the above-mentioned problems, and aims to achieve a low bed height and prevent contact between the bed and the installation floor in a bed device that allows the bed to be raised and lowered freely.

The present invention adopts the following configuration as a means for solving the above problems.

The first invention is a bed device comprising a bed, an upper frame that abuts against the bed and directly supports the bed, a lower frame that is placed on a mounting floor and positioned below the upper frame, and a lifting and lowering connection mechanism that connects the upper frame to the lower frame so that it can be raised and lowered freely, and the upper frame has a contact portion that abuts against the lower frame from above when in the lowest position.

According to the present invention, when the bed is at its lowest position, the upper frame that directly supports the bed directly abuts against the lower frame, and the upper frame is supported from below by the lower frame. This allows the upper frame to be stably supported at the lowest position without the components of the lifting and lowering linking mechanism abutting against each other. In other words, according to the present invention, even if the lifting and lowering linking mechanism has an X-link structure, for example, there is no need to install an abutment between rod-shaped link members that are connected rotatably in an X shape. This allows the link members to be closer to a horizontal position than before, making it possible to achieve an even lower floor.

In addition, according to the present invention, since the upper frame is supported by being in direct contact with the lower frame at the lowest position, even if a lifting connection mechanism is adopted in which the components are miniaturized and partially flexible, the bed can be prevented from coming into contact with the installation floor. Furthermore, the upper frame abuts against the lower frame, improving the rigidity of the bed at the lowest position. Therefore, even if components are installed in a narrow space or near the installation floor, interference with other components or the installation floor can be prevented. This makes it possible to install casters on the lower frame, install a back support mechanism, and place options such as fences close to the installation floor.

The second invention is the first invention, in which the upper frame includes a bed support member that contacts the bed, and a protrusion that protrudes horizontally from the bed support member and contacts the lower frame from above at the lowest position.

According to the present invention, which employs such a configuration, the upper frame is provided with a protrusion that protrudes horizontally from the bed support member, in addition to the bed support member. When the bed is in the lowest position, the protrusion of the upper frame abuts against the lower frame. If the bed support member that directly supports the bed were to abut against the lower frame, it would be necessary to arrange the bed support member so that it overlaps with the lower frame in a plan view, which would impose restrictions on the layout of the bed support member, etc., and could limit the bed support function, which is the main function of the upper frame. In contrast, if the protrusion, which is a separate part from the bed support member, abuts against the lower frame, as in the present invention, it is possible to prevent restrictions on the layout of the bed support member, etc.

The third invention is the second invention, in which the upper frame further includes an option receiver, and the protruding portion supports the option receiver so that it can move forward and backward along the protruding direction from the bed support member.

According to the present invention, the protruding portion, which is the abutment portion that abuts against the lower frame, functions as a support portion that supports the option receiver. Therefore, according to the present invention, there is no need to install a separate support portion for the option receiver, and the structure is simplified, and a smaller, lighter, and more rigid option receiver can be made while preventing the option receiver from contacting the floor when in the lowest position.

The fourth invention is any one of the first to third inventions, in which the upper frame is detachable from the lifting and lowering connecting mechanism and can be separated into a section corresponding to the user's head side and a section corresponding to the user's feet side.

According to the present invention, the upper frame can be detached from the lifting and lowering mechanism during transport, and can be further separated into a section corresponding to the head side and a section corresponding to the foot side. Therefore, according to the present invention, the chair can be separated into multiple sections, and has a structure that is easy to transport and can be easily taken in and out of an ordinary home.

The fifth invention is any one of the first to fourth inventions, in which the lifting and lowering link mechanism has an X-link structure.

The sixth invention is any one of the first to fifth inventions, in which when the position of the upper frame is higher than the lowest position, the entire load of the upper frame and the bed is received by the lifting connection mechanism, and when the position of the upper frame is higher than the lowest position, at least a part of the load received by the lifting connection mechanism is directly transmitted to the lower frame through the contact portion when the upper frame is in the lowest position.

According to the present invention, at least a portion of the load from the upper frame and bed supported by the lifting and lowering linkage mechanism is transmitted to the lower frame through the contact portion when in the lowest position. This reduces the load on the lifting and lowering linkage mechanism when in the lowest position.

According to the present invention, the lifting/lowering mechanism has an X-link structure, so the bed can be raised and lowered stably. Furthermore, even when a lifting/lowering mechanism with such an X-link structure is used, it is not necessary to abut the components of the lifting/lowering mechanism to stabilize the upper frame, so a low bed can be achieved.

According to the present invention, the upper frame has an abutment portion that abuts the lower frame from above when the bed is in the lowest position, making it possible to achieve a low bed height and prevent contact between the bed and the installation floor in a bed device that allows the bed to be raised and lowered freely.

1 is a plan view of a bed device according to an embodiment of the present invention; FIG. 2 is a side view of the bed apparatus shown in FIG. 1 . 2 is an exploded perspective view of a support pedestal constituting the bed apparatus shown in FIG. 1. FIG. 4 is a plan view of the support stand shown in FIG. 3 . FIG. 4 is a side view of the support cradle shown in FIG. 3 . 4 is a side view of the support base shown in FIG. 3, showing a state in which the main frame is raised by a lifting mechanism. FIG. 11 is an enlarged schematic diagram including a contact protrusion and a base frame, in which (a) shows a state in which the contact protrusion is separated from the base frame, and (b) shows a state in which the contact protrusion is in contact with the base frame. FIG.

One embodiment of the bed device according to the present invention will be described below with reference to the drawings. Note that in the following drawings, the scale of each component has been appropriately changed so that each component is of a recognizable size.

The bed device 10 can be used, for example, in a medical environment (including a nursing care environment). In Figures 1 to 9, arrow H indicates the direction that the head of the user will face when the user sleeps, and arrow F indicates the direction that the feet of the user will face when the user sleeps. In the following explanation, the horizontal direction perpendicular to the front-to-back direction of arrows H and F may be referred to as the left-to-right direction.

1 to 6, the bed device 10 includes a bed 11, a support base 12, a drive mechanism 13, a board 14, and a control unit 15. The bed device 10 is a so-called electric bed that uses electricity as a power source.
The bed 11 is longer in the front-to-rear direction than in the left-to-right direction when viewed from above. The bed 11 includes a back bottom 16, a waist bottom 17, and a leg bottom 18, which are arranged in this order from the head side H to the foot side F. The leg bottom 18 includes a knee bottom 19 and a foot bottom 20, which are arranged in this order from the head side H to the foot side F.

The upper surface of the back bottom 16, the upper surface of the waist bottom 17, and the upper surface of the leg bottom 18 (knee bottom 19 and foot bottom 20) each form a part of the bed surface 21. The back bottom 16 corresponds to the part that supports the back of the user on the bed surface 21, the waist bottom 17 corresponds to the part that supports the waist of the user on the bed surface 21, and the leg bottom 18 corresponds to the part that supports the legs of the user on the bed surface 21. The knee bottom 19 corresponds to the part that supports the knees to the waist of the user on the bed surface 21, and the foot bottom 20 corresponds to the part that supports the knees to the toes of the user on the bed surface 21. The waist bottom 17 is formed to be freely stretchable in the front-rear direction. The knee bottom 19 and the foot bottom 20 are connected to be freely rotatable around a bending axis 22 that extends in the left-right direction.

The bed surface 21 is an orthogonal plane perpendicular to the up-down direction in the standard state before the bed 11 is deformed (e.g., rotated with undulations) by the drive mechanism 13 to raise the back or knees. The bed surface 21 is formed in a rectangular shape that is longer in the front-to-back direction than in the left-to-right direction in a plan view. The long side of the bed surface 21 (bed 11) is the front-to-back direction, and the short side of the bed surface 21 is the left-to-right direction. A mattress (not shown) is placed on the bed surface 21.

The support cradle 12 supports the bed 11 and bears the weight of the bed 11 and the user on the bed 11. In this embodiment, the support cradle 12 supports the back bottom 16 and leg bottom 18 so that they can rotate freely around rotation axes 23 and 24 that extend in the left-right direction, and the bed device 10 is a so-called gatch bed. The support cradle 12 includes a base frame 25 (lower frame), a main frame 26 (upper frame), and a lifting and lowering connection mechanism 27.

The base frame 25 is placed on an installation floor S and has a rectangular shape in a plan view. As shown in Fig. 3, the base frame 25 includes a first vertical member 28 extending in the front-rear direction and a first horizontal member 29 extending in the left-right direction.
The first vertical members 28 are provided as a pair spaced apart in the left-right direction.
The first horizontal member 29 is installed between the pair of left and right first vertical members 28 and connects these first vertical members 28 in the left-right direction. The first horizontal members 29 are provided as a pair with a gap in the front-rear direction. The first horizontal member 29 is fixed to the first vertical members 28 so as not to move.

The front-rear end of the first vertical member 28 protrudes further outward in the front-rear direction than the first horizontal member 29, and a leg member 30 for installation is attached to each of these ends. In the illustrated example, a rubber cover is used as the leg member 30, but casters or adjusters can also be used instead of the rubber cover. Even if casters or adjusters are used, the height can be the same as when the leg member 30 is used.

The main frame 26 directly supports the bed 11. In other words, the main frame 26 is in direct contact with the bed 11 and supports the bed 11 from below. The main frame 26 includes a frame portion 31 that supports the bed 11 from below, and an option mounting portion 32 that protrudes in the left-right direction from the frame portion 31 and is disposed below the bed 11.
The frame portion 31 has a rectangular shape in a plan view and includes a second vertical member 33 (bed support member) extending in the front-rear direction and a second horizontal member 34 extending in the left-right direction.

The second vertical members 33 are provided as a pair spaced apart in the left-right direction, directly abut against the bed 11 and support the bed 11 from below.
The second horizontal member 34 is installed between a pair of left and right second vertical members 33 and connects these two second vertical members 33 in the left-right direction. A plurality of second horizontal members 34 (five in the illustrated example) are provided at intervals in the front-rear direction. The second horizontal members 34 are fixed to the second vertical members 33 so as not to move. The front-rear end of the second vertical member 33 protrudes in the front-rear direction further than the second horizontal member 34 that is located outermost in the front-rear direction among the plurality of second horizontal members 34.

A pair of option mounting parts 32 are provided on the left and right sides of the frame part 31, and a pair of left and right option mounting parts 32 are provided with a gap in the front-rear direction. That is, in this embodiment, four option mounting parts 32 are provided. These option mounting parts 32 are arranged at each of the four corners of the bed device 10 in a plan view. Each option mounting part 32 has a pair of front and rear protrusions 35 extending left and right from the second vertical member 33, and an option receiver 36 attached to both protrusions 35 so that they can move forward and backward in the left and right direction (the protrusion direction of the protrusions 35). The option receiver 36 protrudes in the left and right direction from the bed 11. A fall prevention fence (not shown) is attached and detached to the option receiver 36.

Of the two protrusions 35 provided on each option mounting section 32, the protrusion 35 closer to the center of the bed device 10 in the front-rear direction functions as an abutment that abuts against the first vertical member 28 of the base frame 25 when the bed 11 is in the most lowered position (lowest position). Hereinafter, the protrusions 35 that abut against the first vertical member 28 of the base frame 25 are referred to as abutment protrusions 35a. These abutment protrusions 35a have flat lower surfaces, and when the bed 11 is in the lowest position, they abut against the first vertical member 28 of the base frame 25 from above, transmitting the load that the main frame 26 receives from the bed 11 to the base frame 25. In other words, in the bed device 10 of this embodiment, when the bed 11 is in the lowest position (i.e., the lowest position of the main frame 26), the main frame 26 is directly supported by the base frame 25.

The main frame 26 is detachable from the lifting and lowering connecting mechanism 27, and is divided into two parts along the front-rear direction: a head side frame 37 (a part corresponding to the head side) and a foot side frame 38 (a part corresponding to the foot side). In other words, in this embodiment, the main frame 26 is freely separable into the head side H and foot side F of the user. More specifically, in this embodiment, the pair of second vertical members 33 is divided into two parts along the front-rear direction: a head side member 33a and a foot side member 33b. The head side frame 37 is formed by connecting the pair of left and right head side members 33a with two second horizontal members 34 located on the head side H among the multiple second horizontal members 34. The foot side frame 38 is formed by connecting the pair of left and right foot side members 33b with three second horizontal members 34 located on the foot side F among the multiple second horizontal members 34. The optional mounting parts 32 are arranged in pairs on the left and right of the head side frame 37 and the foot side frame 38.

The head-side frame 37 is provided with a retractable frame 39 to which the back bottom 16 is fixed, and a first rotating member 43 that rotates the retractable frame 39 (back bottom 16) around the first rotating shaft 23. Both the retractable frame 39 and the first rotating member 43 are formed in an inverted U-shape that opens toward the head side H in a plan view.
The retractable frame 39 includes a pair of bottom support parts 40 spaced apart in the left-right direction, and a connecting shaft 41 that connects the ends of the bottom support parts 40 on the foot side F in the front-rear direction. The left-right ends of the connecting shaft 41 protrude in the left-right direction from the bottom support parts 40.

As shown in Figures 3 and 4, the retractable frame 39 is connected to the main frame 26 via a retractable link 42. A pair of retractable links 42 are provided, sandwiching the retractable frame 39 in the left-right direction. The left-right end of the connecting shaft 41 is rotatably connected to the foot side F end of each retractable link 42. The head side H end of each retractable link 42 is rotatably connected to the main frame 26 via a first rotating shaft 23. The first rotating shaft 23 rotatably connects the retractable link 42 to the main frame 26.

As shown in Figs. 2 to 4, the first rotating member 43 includes a pair of first push-up arms 43a extending in the front-rear direction along the underside of the back bottom 16, and a first connecting portion 43b connecting the pair of first push-up arms 43a in the left-right direction. The first connecting portion 43b connects the foot side F ends of the first push-up arms 43a. The left-right ends of the first connecting portion 43b protrude in the left-right direction from the first push-up arms 43a and are connected to the second vertical member 33 so as to be freely rotatable. The head side H end of the first push-up arm 43a slidably abuts against the underside of the bottom support portion 40.

In the head side frame 37, when the first rotating member 43 rotates upward, the head side H end of the first push-up arm 43a slides against the underside of the bottom support 40, and the first rotating member 43 pushes up the retractor frame 39. Then, the retractor link 42 rotates around the first rotating shaft 23, and the retractor frame 39 rotates around the connecting shaft 41. As a result, as shown in FIG. 2, the entire back bottom 16 moves to the head side H, while the back bottom 16 rotates up and down around the first rotating shaft 23, and the back bottom 16 is inclined relative to the horizontal plane, resulting in a so-called back-raised state.

The retractable frame 39 in the back-raised state is supported by the retractable stay 44 extending in the front-rear direction. The retractable stay 44 is provided between the retractable frame 39 and the second cross member 34 located furthest to the head side H among the multiple second cross members 34. The end of the retractable stay 44 on the foot side F is rotatably connected to the retractable frame 39, and the end of the retractable stay 44 on the head side H is rotatably connected to the second cross member 34. The retractable stay 44 supports the retractable frame 39 in the back-raised state from diagonally below the head side H.

As shown in Figures 3 and 4, the foot side frame 38 is provided with a fixed member 45 to which the leg bottom 18 is fixed via the second pivot shaft 24, and a second rotating member 46 that rotates the leg bottom 18 around the second pivot shaft 24.
The fixing member 45 is provided on the second horizontal member 34 located furthest on the head side H among the multiple second horizontal members 34 constituting the foot side frame 38. The fixing member 45 protrudes from the second horizontal member 34 toward the foot side F. The end of the head side H of the leg bottom 18 is rotatably fixed to the fixing member 45 via the second rotating shaft 24.

The second rotating member 46 is connected to the second vertical member 33 so as to be rotatable around the push-up shaft 47. A pair of push-up shafts 47 are provided on either side of the second rotating member 46 in the left-right direction. These push-up shafts 47 are arranged coaxially with each other.

The second rotating member 46 is formed in an inverted U-shape that opens on the foot side F in a plan view. The second rotating member 46 includes a pair of left and right second push-up arms 48 that extend in the front-rear direction along the underside of the leg bottom 18, and a second connecting part 49 that connects the pair of left and right second push-up arms 48 in the left-right direction. The second connecting part 49 connects the head side H ends of the pair of left and right second push-up arms 48. The head side H ends of the second push-up arms 48 are connected to the second vertical member 33 via the push-up shaft 47. The foot side F ends of the second push-up arms 48 slidably abut the underside of the knee bottom 19.

In the foot side frame 38, the second rotating member 46 rotates upward, and the end of the foot side F of the second push-up arm 48 slides on the underside of the knee bottom 19 while the second rotating member 46 pushes up the knee bottom 19. Then, as shown in FIG. 2, the knee bottom 19 rotates around the first rotating shaft 23, and the end of the foot side F of the knee bottom 19 rises, while the foot bottom 20 rotates relatively around the bending shaft 22, and the part of the bed surface 21 that corresponds to the knee is bent so as to protrude upward, resulting in a so-called leg-raised state.

The foot bottom 20 is provided with a toe-raising stay 50. The toe-raising stay 50 holds the leg bottom 18 in a toe-raised state. The leg bottom 18 in the toe-raised state is achieved by rotating the foot bottom 20 upward about the bending axis 22 after the leg bottom 18 is placed in the leg-raised state. The toe-raising stay 50 extends in the front-rear direction along the underside of the foot bottom 20. The end of the toe-raising stay 50 on the foot side F is rotatably connected to the foot bottom 20. The end of the toe-raising stay 50 on the head side H is a free end.
In the above-mentioned toe-raising stay 50, when the leg bottom 18 is placed in a toe-raising state, the entire toe-raising stay 50 rotates downward and extends diagonally downward from the foot bottom 20 to the head side H, and the end of the toe-raising stay 50 on the head side H is engaged with the second vertical member 33.

Here, the end of the waist bottom 17 on the head side H is fixed to the retractable frame 39, and the end of the waist bottom 17 on the foot side F is fixed to the fixing member 45. When the back bottom 16 rises and rotates, the end of the waist bottom 17 on the head side H rises and falls together with the back bottom 16, and the waist bottom 17 as a whole curves downward while extending in the front-to-rear direction.

In the support cradle 12, the first rotating member 43 and the second rotating member 46 rotate the back bottom 16 and the leg bottom 18 from the standard state described above, so that the bed 11 is in a typical use state with the back and legs (knees) raised, as shown by the two-dot chain line in FIG. 2. When changing the bed 11 from the standard state to the use state, by raising the legs before raising the back, it is possible to effectively prevent the user from slipping relative to the bed device 10.

3, 5 and 6, the lifting/lowering connecting mechanism 27 connects the base frame 25 and the main frame 26, and supports the main frame 26 so that it can be raised and lowered relative to the base frame 25. The lifting/lowering connecting mechanism 27 employs a so-called X-link structure. The lifting/lowering connecting mechanism 27 includes a first link 51 (link member), a second link 52 (link member), and a connecting rod 53.
The first link 51 and the second link 52 are provided as a pair with a gap in the left-right direction. The first link 51 and the second link 52 are both rod-shaped members extending in the front-rear direction, and the central parts of the first link 51 and the second link 52 in the front-rear direction are rotatably connected to each other via a connecting pin 54. The first link 51 and the second link 52 are connected at their central parts by the connecting pin 54 in this manner, so that the first link 51 and the second link 52 are assembled rotatably in an X shape. The first link 51 and the second link 52 are rotated about the connecting pin 54 so as to approach a vertical position (a position in which the longitudinal direction faces the vertical direction) as the bed 11 (i.e., the main frame 26) is raised, and to approach a horizontal position (a position in which the longitudinal direction faces the horizontal direction) as the bed 11 (i.e., the main frame 26) is lowered.

There are four connecting rods 53. Each connecting rod 53 connects both front-rear end portions of the pair of left and right first links 51 and both front-rear end portions of the pair of left and right second links 52.
Of the four connecting rods 53, the connecting rod 53 connecting the ends of the head side H of the first links 51 is rotatably connected to the first vertical member 28, and the connecting rod 53 connecting the ends of the head side H of the second links 52 is rotatably connected to the second vertical member 33. Of the four connecting rods 53, the connecting rod 53 connecting the ends of the foot side F of the first links 51 is attached to an upper guide portion 55 provided on the second vertical member 33, and the connecting rod 53 connecting the ends of the foot side F of the second links 52 is attached to a lower guide portion 56 provided on the first vertical member 28. The upper guide portion 55 and the lower guide portion 56 each support the connecting rod 53 slidably along the front-rear direction.

When the first link 51 of this lifting connection mechanism 27 is rotated upward by the power generated by the link drive mechanism 59 described below, the second link 52 is also rotated upward in conjunction with the first link 51. At this time, the first link 51 and the second link 52 rotate while the foot side F end of the first link 51 and the foot side F end of the second link 52 are guided toward the head side H by the upper guide portion 55 and the lower guide portion 56, respectively, and the main frame 26 rises relative to the base frame 25.

As shown in Figures 3 and 4, the drive mechanism 13 is attached to the support cradle 12 and moves a movable part 57, which is at least a part of the bed 11 and the support cradle 12. The drive mechanism 13 is a linear actuator that expands and contracts in the front-rear direction, and moves the movable part 57 by expanding and contracting in the front-rear direction. The drive mechanism 13 includes a bottom drive mechanism 58 that rotates the back bottom 16 or the leg bottom 18 as the movable part 57, and a link drive mechanism 59 that rotates the first link 51 or the second link 52 as the movable part 57.

The bottom drive mechanism 58 includes a first drive mechanism 58 a that rotates the back bottom 16 and a second drive mechanism 58 b that rotates the leg bottom 18 .
The first drive mechanism 58a is disposed in a portion of the support cradle 12 located on the head side H along the front-rear direction. The first drive mechanism 58a extends in the front-rear direction to rotate the first rotating member 43 upward. The first drive mechanism 58a is provided between the second horizontal member 34 located closest to the head side H among the plurality of second horizontal members 34 and the first connecting portion 43b. The first drive mechanism 58a is connected to the second horizontal member 34 and the first connecting portion 43b via the mounting member 60 protruding from each of the second horizontal member 34 and the first connecting portion 43b. The first drive mechanism 58a is connected to the mounting member 60 so as to be freely rotatable.

The second drive mechanism 58b is disposed in the center of the support frame 12 in the front-rear direction. The second drive mechanism 58b extends in the front-rear direction to rotate the second rotating member 46 upward. The second drive mechanism 58b is provided between the second cross member 34 located furthest to the head side H among the multiple second cross members 34 provided on the foot side frame 38 and the second connecting portion 49 of the second rotating member 46. The second drive mechanism 58b is connected to the second cross member 34 and the second connecting portion 49 via the attachment member 60 protruding from each of the second cross member 34 and the second connecting portion 49. The second drive mechanism 58b is connected to the attachment member 60 so as to be freely rotatable.

The link drive mechanism 59 is disposed in a portion of the support frame 12 that is located on the foot side F along the front-rear direction. The link drive mechanism 59 rotates the first link 51 upward by extending in the front-rear direction. The link drive mechanism 59 is provided between the first link 51 and a connecting rod 53 that connects the end of the first link 51 on the foot side F among the multiple connecting rods 53. The link drive mechanism 59 is connected to the connecting rod 53 via an attachment member 60 that protrudes from the connecting rod 53. The link drive mechanism 59 is connected to the first link 51 via a conversion mechanism 61. The conversion mechanism 61 converts the extension and contraction motion of the link drive mechanism 59 into the rotational motion of the first link 51. The link drive mechanism 59 is connected to the attachment member 60 and the conversion mechanism 61 so as to be freely rotatable.

1 to 6, the board 14 is fixed to the support frame 12 and stands above the bed surface 21. A pair of front and rear boards 14 are provided, and stand from both ends of the second vertical member 33 in the front-rear direction.
The control unit 15 controls the drive mechanism 13. The control unit 15 is electrically connected to the drive mechanism 13. A power cord C and an operation unit (not shown) are electrically connected to the control unit 15. Power is supplied to the control unit 15 from the outside via the power cord C, and instructions from the outside are input to the control unit 15 via the operation unit. The control unit 15 controls the drive mechanism 13 based on instructions from the outside.

In the bed device 10 of this embodiment, the extension and contraction motion of the link drive mechanism 59 is converted into a rotational motion by the conversion mechanism 61, and the first link 51 and the second link 52 of the lifting and lowering connecting mechanism 27 are rotated around the connecting pin 54 by this rotational motion. Furthermore, the main frame 26 and the bed 11 are raised and lowered by the rotation of the first link 51 and the second link 52. Here, when the main frame 26 and the bed 11 are raised (positioned higher than the lowest position), as shown in FIG. 7(a), the abutment protrusion 35a protruding horizontally from the second vertical member 33 of the main frame 26 is positioned above the first vertical member 28 of the base frame 25. In other words, the abutment protrusion 35a is spaced upward from the base frame 25. On the other hand, when the main frame 26 and the bed 11 are in the lowest position, as shown in FIG. 7(b), the abutment protrusion 35a abuts from above against the flat upper surface of the first vertical member 28 of the base frame 25. As a result, when the main frame 26 and the bed 11 are in the lowest position, the main frame 26 is directly supported by the base frame 25.

In the bed device 10 of this embodiment as described above, the main frame 26 is provided with an abutment protrusion 35a that abuts against the base frame 25 from above at the lowest position of the bed 11. Therefore, according to the bed device 10 of this embodiment, at the lowest position where the bed 11 is lowered to the lowest position, the main frame 26 that directly supports the bed 11 abuts directly against the base frame 25, and the main frame 26 is supported from below by the base frame 25. Therefore, the main frame 26 can be stably supported at the lowest position without abutting the components of the lifting and lowering connecting mechanism 27 (for example, the first link 51 and the second link 52). In other words, according to the bed device 10 of this embodiment, even if the lifting and lowering connecting mechanism 27 has an X-link structure, it is not necessary to install an abutment part between the rod-shaped first link 51 and the second link 52 that are connected rotatably in an X shape. Therefore, the link member can be brought closer to a horizontal position than before, and a further lowering can be achieved.

In addition, according to the bed device 10 of this embodiment, the main frame 26 is supported in direct contact with the base frame 25 at the lowest position, so that even if the lifting and lowering connecting mechanism 27 is small and partially flexible, the bed 11 can be prevented from coming into contact with the installation floor S. In addition, the main frame 26 abuts against the base frame 25, improving the rigidity of the bed 11 at the lowest position. Therefore, even if components are installed in a narrow space or near the installation floor S, interference with other components or the installation floor can be prevented. This makes it possible to install casters on the base frame 25, install a bottom drive mechanism 58, and place options such as fences close to the installation floor S.

In addition, in the bed device 10 of this embodiment, the main frame 26 includes a second vertical member 33 that directly abuts against the bed 11, and an abutment protrusion 35a that protrudes horizontally from the second vertical member 33 and abuts against the base frame 25 from above at the lowest position. According to the bed device 10 of this embodiment, the main frame 26 includes an abutment protrusion 35a that protrudes horizontally from the second vertical member 33 in addition to the second vertical member 33. When the bed 11 is in the lowest position, the abutment protrusion 35a of the main frame 26 abuts against the base frame 25. If the second vertical member 33 that directly supports the bed 11 is to abut against the base frame 25, restrictions will be placed on the layout of the second vertical member 33, such as the need to arrange the second vertical member 33 so that it overlaps with the base frame 25 in a plan view, which may limit the bed support function, which is the main function of the main frame 26. In contrast, in the bed device 10 of this embodiment, if the abutment protrusion 35a, which is a separate part from the second vertical member 33, is abutted against the base frame 25, it is possible to prevent restrictions on the layout, etc., of the second vertical member 33.

The bed device 10 of this embodiment also includes an option receiver 36 to which an optional component can be attached and detached, and the abutting protrusion 35a supports the option receiver 36 so that it can move back and forth in the left-right direction (the direction in which it protrudes from the second vertical member 33). With this type of bed device 10 of this embodiment, the abutting protrusion 35a that abuts against the base frame 25 functions as a support part that supports the option receiver 36. This eliminates the need to separately install a support part for the option receiver 36, simplifying the structure and achieving a smaller, lighter, and more rigid structure, while also preventing the option receiver 36 from coming into contact with the floor when in the lowest position.

In addition, in the bed device 10 of this embodiment, the main frame 26 is detachable from the lifting/lowering connecting mechanism 27, and can be separated into the user's head side H and foot side F. Therefore, the main frame 26 can be detached from the lifting/lowering connecting mechanism 27 during transportation, and can be further separated into the head side H and foot side F. Therefore, according to the bed device 10 of this embodiment, it can be separated into multiple parts, has excellent transportability, and has a structure that can be easily taken in and out of an ordinary home.

In addition, in the bed device 10 of this embodiment, the lifting and lowering connection mechanism 27 has an X-link structure. This allows the bed 11 to be raised and lowered stably. Furthermore, even when a lifting and lowering connection mechanism 27 having such an X-link structure is used, it is not necessary to abut the components of the lifting and lowering connection mechanism 27 against each other to stabilize the main frame 26, so a low bed can be achieved.

In addition, in the bed device 10 of this embodiment, when the position of the main frame 26 is higher than the lowest position, the entire load of the main frame 26 and the bed 11 is received by the lifting connection mechanism 27, whereas when in the lowest position, at least a portion of the load received by the lifting connection mechanism 27 is directly transmitted to the base frame 25 through the abutment protrusion 35a, and the base frame 25 supports at least a portion of the load via the abutment protrusion 35a. As a result, the load support force of the lifting connection mechanism 27 in the lowest position is reduced, and the support load of the lifting connection mechanism 27 can be reduced.

Although the preferred embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to the above embodiment. The shapes and combinations of the components shown in the above embodiment are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

For example, in the above embodiment, the main frame 26 is provided with an abutment protrusion 35a, which abuts against the base frame 25 at the lowest position of the bed 11. However, the present invention is not limited to this, and it is also possible to adopt a configuration in which an abutment protrusion is provided on the base frame 25, and this abutment protrusion abuts against the second vertical member 33 of the main frame 26 from below at the lowest position of the bed 11. In such a case, the second vertical member 33 provided on the main frame 26 functions as the abutment in the present invention.

In addition, in the above embodiment, a configuration having an X-link structure is used as the lifting/lowering linking mechanism. However, the present invention is not limited to this, and it is also possible to use a lifting/lowering linking mechanism having a different structure.

In the above embodiment, the abutment protrusion 35a may be made of a material different from that of the second vertical member 33. For example, the abutment protrusion 35a may be made of an elastic body to reduce the impact when it abuts against the base frame 25. Also, only the lower surface layer of the abutment protrusion 35a may be made of an elastic body, and the other parts may be made of a rigid body such as metal. In this way, the abutment part in the present invention does not necessarily have to be made of the same material as the other parts of the lower frame. Furthermore, the area of the base frame 25 where the abutment part abuts does not necessarily have to be made of the same material as the other similar areas, and it is also possible to adopt a configuration having a surface layer made of an elastic body.

In addition, in the above embodiment, the bed of the present invention (bed 11) is configured to have a back bottom 16, a waist bottom 17, and a leg bottom 18. However, the present invention is not limited to this, and the bed can also be configured to further include, for example, cushion members arranged under the back bottom 16, waist bottom 17, and leg bottom 18. In this way, the bed of the present invention is not limited to a configuration consisting of only a bottom, and it is also possible to adopt a configuration that includes other members in addition to the bottom.

In addition, in the above embodiment, the main frame 26 is designed to be freely separated into the user's head side H and foot side F, but this is not limited to a mechanism that separates them, and the head side and foot side can also be integrated. In hospitals, elderly care facilities, etc., if there are elevators and other facilities, even an integrated bed can be easily transported, so this is not necessarily limited to a mechanism that separates them.

10 Bed device 11 Bed 25 Base frame (lower frame)
26 Main frame (upper frame)
27 Lifting and lowering connecting mechanism 28 First vertical member 33 Second vertical member (bed support member)
35 Protrusion 35a Abutment protrusion (abutment portion)
37 Head side frame (part corresponding to the head side)
38 Foot side frame (part corresponding to the foot side)
51 First link (link member)
52 Second link (link member)
54 Connecting pin S Installation floor

Claims (4)

A bed and
An upper frame supporting the bed;
a lower frame disposed below the upper frame;
a lifting/lowering connection mechanism that connects the upper frame so that the upper frame can be lifted and lowered;
Equipped with
The upper frame includes a first member extending in a first direction and an option mounting portion protruding in a second direction intersecting the first direction,
The option mounting portion includes a protrusion extending in the second direction and an option receiver attached to the protrusion and to which a fence body is attached and detached,
The lower frame includes a first vertical member extending in the first direction,
An electric bed, wherein the first vertical member includes a first main body portion made of metal and a first portion of an elastic body provided on the first main body portion and overlapping with the protrusion portion when viewed from above. The electric bed of claim 1, wherein the first portion is provided on the upper surface of the first main body portion. The electric bed according to claim 1 or 2, wherein the lifting and lowering connection mechanism includes a link member and a connecting rod, and a portion of the connecting rod is curved. An electric bed according to any one of claims 1 to 3, wherein the lifting and lowering linkage mechanism has an X-link structure.

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