JP6372652B2 - Bottom structure and bed - Google Patents

Description

  The present invention relates to a bottom structure such as a bed or a chair and a bed including the bottom structure.

  In recent years, electric beds have become widespread as beds used by users such as patients and care recipients in hospitals, care facilities, or homes. The electric bed has a back-up angle adjustment function, a knee-up angle adjustment function, and a floor height adjustment function. By an actuator such as a motor, the posture of the bottom (floor board) that supports the user and the height of the bottom from the floor are adjusted. Is adjustable.

  This type of electric bed is divided into a plurality of bottoms. For example, as shown in FIG. 10A, the electric bed includes four bottoms of a back bottom 311, a waist bottom 312, a knee bottom 313, and a leg bottom 314. In such an electric bed, as shown in FIG. 10B, by performing a gudge operation with the connecting portions of the bottoms as fulcrums, the knee-lifting is interlocked with the back-raising to assist the user's rising motion (for example, Patent Document 1).

JP-A-8-191864

  However, since the waist bottom is fixed in the conventional electric bed, when the gagging operation is performed, the posture change of the bottom does not follow the bending of the user's body. For example, as shown in FIG. 10B, when a gudge operation is performed, a gap is generated between the user's waist and the mattress (bottom). For this reason, there is a problem that the user feels pressure or discomfort from the back bottom, or the bone is distorted, which adversely affects the user's body.

  In addition, in the conventional electric bed, the bottom width (bottom width) is sized to match the bed width (bed width), so for multiple types of beds with different bed widths, each bed width It was necessary to prepare a plurality of types of bottoms having bottom widths corresponding to, and to replace these bottoms. For this reason, it is necessary to produce a plurality of types of bottoms having different bottom widths, increasing the number of molds and parts, and there is a problem that management, cost, and environment cannot be considered.

  The present invention has been made to solve such a problem, and provides a bottom structure and a bed that can follow the user's waist and can accommodate a plurality of different widths while ensuring assemblability. Objective.

  In order to achieve the above object, one aspect of an electric bed according to the present invention is a bottom provided with a connecting unit configured by connecting a plurality of unit bodies each composed of one or a plurality of units in one direction. In the structure, a plurality of the connecting units are provided at a predetermined interval in another direction orthogonal to the one direction, and the unit is a first connecting part provided on one side of the one direction. And a second connecting portion provided on the other side in the one direction, the first connecting portion of the unit in one of the two adjacent unit bodies, and the two adjacent unit bodies. The second unit of the unit on the other side is loosely fitted and connected.

  ADVANTAGE OF THE INVENTION According to this invention, the bottom structure and bed which follow a user's waist and can respond to several different width | variety are ensured, ensuring assembly property.

It is a perspective view of the electric bed concerning an embodiment of the invention. It is a perspective view of the electric bed which concerns on embodiment of this invention when performing the back raising gudge operation | movement. It is an external appearance perspective view which shows the structure of the bottom structure which concerns on embodiment of this invention. It is a disassembled perspective view which shows the structure of the bottom structure which concerns on embodiment of this invention. FIG. 3B is a cross-sectional perspective view of the bottom structure according to the embodiment of the present invention when cut along a plane A surrounded by a one-dot chain line in FIG. 3A. It is a perspective view of the unit body in the bottom structure concerning an embodiment of the invention. It is a perspective view of the unit body in the bottom structure concerning an embodiment of the invention. FIG. 4B is a cross-sectional perspective view of the unit body in the bottom structure according to the embodiment of the present invention when cut along a plane B surrounded by a one-dot chain line in FIG. 4A. It is a perspective view which shows the state before connecting two unit bodies in the bottom structure which concerns on embodiment of this invention. It is a perspective view which shows the state after connecting two unit bodies in the bottom structure which concerns on embodiment of this invention. It is a top view which shows the state before connecting two unit bodies in the bottom structure which concerns on embodiment of this invention. It is a top view which shows the state after connecting two unit bodies in the bottom structure which concerns on embodiment of this invention. It is a side view which shows the attitude | position of the bottom after raising the back of an electric bed provided with the bottom structure which concerns on embodiment of this invention. It is a fragmentary perspective view which shows the state of the waist bottom after raising the back of an electric bed provided with the bottom structure which concerns on embodiment of this invention. It is a cross-sectional perspective view which shows the state of the waist bottom after raising the back of the electric bed provided with the bottom structure which concerns on embodiment of this invention when it cut | disconnects by the plane C enclosed with the dashed-dotted line of FIG. 8A. It is a principal part enlarged view of the bottom structure which concerns on the modification of this invention. It is a perspective view of the conventional electric bed. It is a side view which shows the attitude | position of the bottom after the back raising in the conventional electric bed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified.

(Embodiment)
First, the whole structure of the electric bed 2 provided with the bottom structure which concerns on embodiment of this invention is demonstrated using FIG. FIG. 1 is a perspective view of an electric bed according to an embodiment of the present invention. In this embodiment, the length direction of the bed is the X direction, the bed width direction is the Y direction, and the vertical direction is the Z direction.

  The electric bed 2 is a bed used by a user such as a patient or a care recipient in a hospital, a nursing facility, or a home. As shown in FIG. 1, a bottom 210 that supports a user (human body) and a bottom 210 An adjustment mechanism 220 that adjusts the posture and height, a bed frame 230, and an operation unit (not shown) such as a remote controller for giving an operation command to the adjustment mechanism 220 are provided. On the bottom 210, for example, a bedding such as a mattress is disposed.

  The bottom 210 is divided into a plurality of parts, and is composed of a plurality of parts (bottoms) sequentially connected to each other by a hinge (hinge) or the like. As shown in FIG. 1, the bottom 210 is divided into, for example, four parts, and includes a back bottom 211, a waist bottom 212, a knee bottom 213, and a foot bottom (leg bottom) 214.

  The back bottom 211 is disposed at a position corresponding to the back portion of the user. The waist bottom 212 is disposed at a position corresponding to the waist portion of the user. The knee bottom 213 is disposed at a position corresponding to the user's thigh. The foot bottom 214 is disposed at a position corresponding to the user's lower leg.

  The adjustment mechanism 220 is a mechanism that adjusts the posture and height of the bottom 210 in accordance with an operation command sent from the operation unit. The adjustment mechanism 220 includes a control circuit, an electric actuator (such as a motor) that operates under the control of the control circuit, and a link mechanism (such as a back-raising link mechanism and a knee-raising link mechanism) that is movable by the electric actuator. .

  The bed frame 230 includes, for example, a main frame that supports the bottom 210, a headboard provided on the head side of the user who uses the bed, and a footboard provided on the foot side of the user.

  In the electric bed 2 configured as described above, a user who uses the bed by performing a gudge operation with the connecting portions (hinges) of the bottoms 211, 212, knees 213, and foot bottoms 214 as fulcrums. Can assist in getting up.

  For example, when a back raising gage operation is performed, the back bottom 211 is moved by the back raising link mechanism, the knee bottom 213 and the foot bottom 214 are moved by the knee raising link mechanism, and the bottom 210 is in a posture as shown in FIG. Transforms into In the present embodiment, knee-lifting is interlocked with back-up to assist the user in getting up.

  Next, the structure of the bottom structure 1 which concerns on embodiment of this invention is demonstrated using FIG. 3A-FIG. 3C. 3A to 3B are views showing the configuration of the bottom structure (waist bottom) according to the embodiment of the present invention, in which FIG. 3A is an external perspective view, FIG. 3B is an exploded perspective view, and FIG. 3C is one point of FIG. It is a cross-sectional perspective view when it cut | disconnects by the plane A enclosed with a chain line.

  The bottom structure 1 according to the present embodiment is a waist bottom 212 of the electric bed 2 shown in FIG. That is, the electric bed 2 includes the bottom structure 1 as the waist bottom 212.

  As shown in FIG. 3A to FIG. 3C, the bottom structure 1 includes a connecting unit 10 configured by connecting a plurality of unit bodies 100 each including one or a plurality of units 100U in one direction. In the present embodiment, the “one direction” is the X direction. The Y direction is a direction orthogonal to the X direction, and the Z direction is a direction orthogonal to both the X direction and the Y direction and is a vertical direction.

  A plurality of connection units 10 are provided at predetermined intervals in the Y direction, which is another direction orthogonal to one direction. In the present embodiment, four connection units 10 are provided at equal intervals along the Y direction. Adjacent connecting units 10 are not in contact with each other, and a gap is provided between them.

  Each connecting unit 10 is obtained by connecting a plurality of unit bodies 100 to each other in the X direction. In the present embodiment, one connecting unit 10 is configured by connecting eight unit bodies 100. The eight unit bodies 100 are integrated by connecting portions in the short direction (width direction) of each unit body 100.

  Note that the fixing unit bodies 101 having a structure similar to the unit body 100 are connected to the unit bodies 100 at both ends in the X direction of the connecting unit 10. The fixing unit body 101 employs a partial structure of the unit body 100.

  The four integrated connecting units 10 are connected by a pair of joint bars 20. In the present embodiment, the joint bar 20 is arranged so as to sandwich each connecting unit 10 from the X direction. Each connecting unit 10 and the joint bar 20 are fixed by screws 30.

  Here, the detailed structure of each unit body 100 is demonstrated using FIG. 4A-FIG. 4C. 4A and 4B are perspective views of the unit body in the bottom structure according to the embodiment of the present invention. FIG. 4C is a cross-sectional perspective view of the unit body when cut along a plane B surrounded by a one-dot chain line in FIG. 4A.

  As shown in FIGS. 4A to 4C, the unit body 100 is configured by connecting a plurality of units 100U in the Y direction (other directions). In the present embodiment, one unit body 100 is configured by connecting three units 100U. The three units 100U are connected by a connecting plate 100P standing in the Z direction (vertical direction). That is, two units 100U adjacent in the Y direction are connected by the connecting plate 100P.

  The unit 100U and the connecting plate 100P are integrally formed of resin, for example, but are not limited to resin. Moreover, each unit 100U in the unit body 100 has the same configuration.

  Each unit 100U includes a first connecting portion 110 provided on one side in the X direction, a second connecting portion 120 provided on the other side in the X direction, and a bottom plate portion 130.

  The 1st connection part 110 has a pair of plate-shaped protrusion part 111 which protrudes toward the one side of a X direction. Further, the pair of protrusions 111 are arranged at a predetermined interval along the Y direction. In the present embodiment, the pair of projecting portions 111 are provided at both ends in the Y direction of the unit 100U.

  More specifically, each protrusion 111 is a protrusion formed so as to stand on one side of the bottom plate 130 in the X direction. The pair of protruding portions 111 are formed so as to protrude in the X direction from both ends of the bottom plate portion 130 in the Y direction. In addition, the outer edge shape of each front-end | tip part of a pair of protrusion part 111 is a semicircular arc shape.

  Each of the pair of protrusions 111 is provided with a hole 111a that is recessed in the Y direction. In the present embodiment, the hole 111 a is a through hole that penetrates the protruding portion 111. The hole 111a has an oval shape in plan view. Specifically, the hole 111a has a racetrack shape that is long in the Y direction. The hole 111a may not be a through-hole, and may be a hole with a bottom that is recessed in the thickness direction of the protruding portion 111.

  Further, as shown in FIG. 4C, the protruding portion 111 is formed with a tapered portion 111b following the hole portion 111a. The tapered portion 111b is formed such that the thickness of the protruding portion 111 gradually decreases from the hole portion 111a toward the edge of the protruding portion 111. In other words, the tapered portion 111b is formed such that the thickness of the protruding portion 111 gradually increases from the edge of the protruding portion 111 toward the hole portion 111a.

  The first connecting part 110 further includes a reinforcing rib 112 provided between the pair of projecting parts 111. A plurality of reinforcing ribs 112 are provided at a predetermined interval. For example, five reinforcing ribs 112 are provided at regular intervals between the pair of protruding portions 111. Each reinforcing rib 112 has a configuration similar to that of the protruding portion 111 and is a protruding plate formed so as to stand on one side in the X direction of the bottom plate portion 130. The reinforcing ribs 112 are disposed with a gap in the Y direction together with the pair of protruding portions 111. Thus, the air permeability of the unit 100U can be ensured by providing the gap.

  The second connecting part 120 has a recess 121 formed on the other side in the X direction of the bottom plate part 130. In the present embodiment, the recess 121 includes a pair of upper pieces 121a and a lower piece 121b provided to face in the up-down direction (Z direction) and a pair of first pieces provided in the left-right direction (Y direction). It has a first side piece 121c and a second side piece 121d.

  The pair of upper pieces 121 a and lower pieces 121 b are formed so as to stand on the upper and lower ends on the other side in the X direction of the bottom plate portion 130. The pair of first side pieces 121 c and second side pieces 121 d are formed so as to stand on the left and right ends on the other side in the X direction of the bottom plate portion 130. The pair of first side pieces 121c and the second side piece 121d connect both ends in the Y direction of the pair of upper pieces 121a and lower pieces 121b.

  That is, the recess 121 is a space surrounded by the four surfaces of the pair of the upper piece 121a and the lower piece 121b and the pair of the first side piece 121c and the second side piece 121d with the bottom plate portion 130 as the bottom surface.

  The 2nd connection part 120 has convex part 122a provided in each inner surface of a pair of 1st side piece 121c and the 2nd side piece 121d further. That is, the convex portion 122 a is provided on the inner surface of the concave portion 121.

  The convex portion 122a provided on the first side piece 121c is formed so as to protrude from the first side piece 121c toward the second side piece 121d. On the other hand, the convex part 122a provided on the second side piece 121d is formed so as to protrude from the second side piece 121d toward the first side piece 121c. The pair of convex portions 122a are formed so as to face each other, and both have a circular shape in plan view.

  In the present embodiment, the length of the lower piece 121b in the X direction is longer than the length of the upper piece 121a in the X direction. That is, the lower piece 121b is visible when the unit 100U is viewed from above.

  The second connecting part 120 has a through hole 123. A plurality of through holes 123 are provided in the lower piece 121b, but may be one. Moreover, the through-hole 123 can be made into a circular shape or a slit shape. Thus, by providing the through hole 123 in the lower piece 121b of the recess 121, the air permeability of the unit 100U can be ensured.

  Next, the connection state of two adjacent unit bodies 100 will be described in detail with reference to FIGS. 4A to 4C again using FIGS. 3A to 3C.

  3A to 3C, in the two unit bodies 100 adjacent to each other in each connecting unit 10, the first connecting portion 110 of the unit 100U in one of the two adjacent unit bodies 100 and the two adjacent unit bodies 100 are used. The other connecting unit 120U of the unit 100U is loosely connected and connected.

  In the present embodiment, two adjacent unit bodies 100 are loosely fitted with the pair of protrusions 111 of the first connecting part 110 of one unit 100U and the recess 121 of the second connecting part 120 of the other unit 100U. Linked in state.

  Specifically, two adjacent unit bodies 100 are in a state in which a pair of protrusions 111 in one unit 100U and a pair of first side piece 121c and second side piece 121d in the other unit 100U are loosely fitted. It is connected.

  More specifically, the two adjacent unit bodies 100 include a hole 111a provided in the pair of protrusions 111 of one unit 100U, and a first side piece 121c and a second side piece 121d of the other unit 100U. A pair of convex portions 122a provided on the two are connected in a loosely fitted state.

  Further, when two adjacent unit bodies 100 are connected to each other, the upper piece 121a and the lower piece 121b in the recess 121 of one unit 100U move the pair of protruding portions 111 of the other unit 100U in the vertical direction (Z direction). It is formed so as to be sandwiched between.

  As described above, in the two adjacent unit bodies 100, the concave portion 121 of the second connecting portion 120 in one unit body 100 faces the pair of protruding portions 111 of the first connecting portion 110 in the other unit body 100. Connected. In this case, in the present embodiment, when two adjacent unit bodies 100 are connected to each other, a part of the pair of protruding portions 111 in one unit 100U is stored in the recess 121 in the other adjacent unit body 100. Is done.

  Next, a method of connecting the two unit bodies 100 will be described with reference to FIGS. 5A, 5B, 6A, and 6B. FIG. 5A is a perspective view showing a state before connecting two unit bodies, and FIG. 5B is a perspective view showing a state after connecting two unit bodies. FIG. 6A is a top view showing a state before two unit bodies are connected, and corresponds to FIG. 5A. FIG. 6B is a top view showing a state after connecting the two unit bodies, and corresponds to FIG. 5B.

  As shown in FIGS. 5A and 6A, when two unit bodies 100 are connected, the first connecting portion 110 of each unit 100U in one unit body 100 is replaced with the second connecting portion of each unit 100U in the other unit body 100. The protruding portion 111 of the first connecting portion 110 in one unit body 100 is inserted into the concave portion 121 of the second connecting portion 120 in the other unit body 100 so as to face to 120.

  When inserting, the protrusions 111 in one unit body 100 so that the holes 111a of the pair of protrusions 111 in one unit body 100 are fitted into the pair of protrusions 122a in the recess 121 in the other unit body 100. Is pushed into the recess 121 in the other unit body 100.

  At this time, in the present embodiment, since the protruding portion 111 is provided with the tapered portion 111b following the hole portion 111a, the protruding portion 122a can be easily formed by sliding the protruding portion 122a along the tapered portion 111b. It can be fitted into the hole 111a.

  Moreover, since the tapered portion 111b is formed so that the thickness of the protruding portion 111 gradually increases from the end edge of the protruding portion 111 toward the hole portion 111a, the convex portion 122a is once fitted into the hole portion 111a. The convex portion 122a is difficult to be removed from the hole portion 111a.

  By connecting the two unit bodies 100 in this way, as shown in FIG. 6B, the convex portion 122a of the other unit 100U is locked in the hole 111a of the one unit 100U, and the two unit bodies 100 are engaged. Are concatenated.

  In this case, since the hole portion 111a is oval and the convex portion 122a is circular, the convex portion 122a has a gap between the convex portion 122a and the hole portion 111a on both sides in the X direction. Thus, the hole 111a is locked. That is, the convex part 122a and the hole part 111a are loosely fitted.

  With the above connection method, the two unit bodies 100 can be connected as shown in FIGS. 5B and 6B. Further, by repeating this operation, the plurality of unit bodies 100 can be sequentially connected, and the connecting unit 10 in which the plurality of unit bodies 100 are connected is obtained.

  In addition, when releasing the connection state of the two unit bodies 100, that is, when separating the two connected unit bodies 100, the two units are applied while pressing in the direction in which the distance between the pair of protrusions 111 is reduced. By pulling the body 100 away in the X direction, the protrusion 122a in the recess 121 can be easily removed from the hole 111a of the protrusion 111. Thereby, the two unit bodies 100 can be separated.

  Next, operational effects when the bottom structure 1 according to the present embodiment is used as the waist bottom 212 of the electric bed 2 shown in FIG. 1 will be described with reference to FIGS. 7, 8A and 8B. FIG. 7 is a side view showing the posture of the bottom after raising the back of the electric bed provided with the bottom structure according to the embodiment of the present invention. FIG. 8A is a partial perspective view showing a state of the waist bottom after raising the back of the electric bed. FIG. 8B is a cross-sectional perspective view showing a state of the waist bottom after raising the back of the electric bed when cut by a plane C surrounded by a one-dot chain line in FIG. 8A.

  In the electric bed 2 to which the bottom structure 1 according to the present embodiment is applied, when a gagging operation (back raising / knee raising) is performed, the bottom 210 assumes a posture as shown in FIGS. 7 and 8A. That is, the waist bottom 212 (bottom structure 1) is curved with an appropriate curvature so as to protrude downward.

  The operation of the waist bottom 212 (bottom structure 1) during the gudge operation will be described in detail below.

  As described above, in the connection unit 10 of the bottom structure 1 according to the present embodiment, the two adjacent unit bodies 100 include the first connection part 110 of one unit body 100 and the second connection part of the other unit body 100. 120 is connected in a loosely fitted state. Specifically, as shown in FIG. 6B, the hole 111a of the protrusion 111 of one unit body 100 and the protrusion 122a in the recess 121 of the other unit body 100 are loosely fitted.

  With this configuration, when the back raising gage operation is performed (that is, when the back bottom 211 is raised by the back raising link mechanism), the waist bottom 212 (bottom structure 1) connected to the back bottom 211 by the hinge is connected. Each unit body 100 in the unit 10 is gradually displaced in conjunction with the gage operation.

  Specifically, as shown in FIG. 8B, the convex portion 122a loosely fitted in the hole 111a of the protruding portion 111 moves to the tip end side of the protruding portion 111 in the hole 111a, so that two adjacent The unit bodies 100 (units 100U) are displaced in the direction in which they are separated from each other. At the same time, the back bottom 211 rises, so that the unit body 100 on the upper end portion side on the back bottom 211 side of the connecting unit 10 rises up.

  Thereby, as shown in FIG. 7, the waist bottom 212 (bottom structure 1) is bent so as to follow the bending of the body of the user who uses the bed. As a result, a gap generated between the user's waist and the mattress (waist bottom 212) can be reduced. Therefore, the user can be prevented from receiving a feeling of pressure or a sense of incongruity from the back bottom 211, and can also reduce adverse effects on the user's body due to bone distortion.

  Further, in the present embodiment, as shown in FIG. 8B, in the upper piece 121a and the lower piece 121b in the recess 121 of the second connecting portion 120, the length in the X direction of the lower piece 121b is the same as that in the X direction of the upper piece 121a. It is longer than the length. That is, the floor-side lower piece 121b protrudes more toward the back bottom 211 than the upper piece 121a.

  If the lengths of the lower piece 121b and the upper piece 121a are the same, the displacement direction of each unit body 100 cannot be restricted, and the waist bottom 212 (bottom structure 1) is convex both upward and downward. Can bend. For this reason, there is a possibility that the waist bottom 212 (bottom structure 1) undulates in the middle of the gudge operation, which may give the user unpleasant feeling.

  On the other hand, by causing the lower piece 121b to protrude toward the back bottom 211 from the upper piece 121a as in the present embodiment, the displacement direction of each unit body 100 can be restricted to a certain direction. Thereby, it can avoid curving so that waist bottom 212 (bottom structure 1) may become convex upward. That is, in the present embodiment, as shown in FIG. 7, the waist bottom 212 is curved so as to be convex only downward. As a result, reverse bending of the waist bottom 212 can be prevented. Accordingly, since the waist bottom 212 (bottom structure 1) does not wave during the gudge operation, it is possible to reduce discomfort to the user.

  In the present embodiment, a plurality of connecting units 10 each having a plurality of unit bodies 100 connected in the X direction are provided at predetermined intervals in the Y direction. In the present embodiment, the four connecting units 10 are arranged at equal intervals in the bed width direction.

  Thereby, by adjusting the number of connection units 10 having the same configuration (that is, by reducing or increasing the number), it is possible to cope with a plurality of types of beds having different bed widths. Alternatively, it is possible to cope with a plurality of types of beds having different bed widths by adjusting the intervals in the bottom width direction of the plurality of connecting units 10.

  Thus, according to the bottom structure 1 in the present embodiment, the connection unit 10 having the same configuration can be used to adapt to furniture such as a plurality of types (plural sizes) of beds having different bottom widths. Therefore, for example, it is not necessary to prepare a plurality of types of bottoms having a bottom width corresponding to each bed width for a plurality of types of beds having different bed widths. For this reason, the increase in the number of molds and parts can be reduced, and a bottom structure suitable for management, cost, and environment can be realized.

  Further, in the present embodiment, when two adjacent unit bodies 100 are connected in the connecting unit 10, the protruding portion 111 of one unit body 100 and the concave portion 121 of the other unit body 100 are loosely fitted. The two unit bodies 100 are connected by pushing one unit body 100 into the other unit body 100. Specifically, the two unit bodies 100 are combined so that the hole 111a provided in the protruding part 111 and the convex part 122a provided in the concave part 121 are loosely fitted.

  Thus, according to the bottom structure 1 in the present embodiment, the connecting unit 10 can be easily assembled.

  As described above, according to the present embodiment, it is possible to realize a bottom structure and a bed that can follow a user's waist and can cope with a plurality of different widths while ensuring assemblability.

  Further, in each unit body 100 (unit 100U) in the bottom structure 1 according to the present embodiment, the pair of projecting portions 111 and the plurality of reinforcing ribs 112 are arranged with a gap therebetween. A through hole 123 is provided in the lower piece 121b of the recess 121 of each unit body 100 (unit 100U).

  As a result, even if a plurality of unit bodies 100 are connected to form the connecting unit 10, air permeability can be ensured. Therefore, sufficient air permeability can be ensured not only after raising the back (after the gudge operation) but also before raising the back (before the gudge operation). That is, sufficient air permeability can be ensured not only after the bottom structure 1 is bent but also before the bottom structure 1 is bent. Therefore, a comfortable bottom structure and bed excellent in air permeability can be realized. Further, in rental applications, the bottom is washed (washed with water, etc.) after rental. When the washing is performed by arranging the protruding portions 111 and the reinforcing ribs 112 with a gap or providing the through holes 123 as described above. The drying time can also be shortened.

  Furthermore, by appropriately narrowing the gap between the protrusion 111 and the reinforcing rib 112, it is possible to prevent the operator from pinching the finger in the gap when the connecting unit 10 is assembled or disassembled. In other words, the gap between the protrusion 111 and the reinforcing rib 112 is preferably set to a size that does not allow a human finger to enter.

(Other variations)
As mentioned above, although the bottom structure and bed concerning this invention were demonstrated based on embodiment, this invention is not limited to the said embodiment.

  For example, in the above embodiment, as shown in FIG. 6B, the through-hole 123 provided in the lower piece 121b of the unit 100U was hidden behind the upper piece 121a when viewed from above, but as shown in FIG. Alternatively, the through hole 123A may be enlarged so that the through hole 123A has an opening shape that can be seen when the unit is viewed from above. Thereby, the air permeability of the unit body can be improved.

  In the above embodiment, when two unit bodies 100 are connected, a hole 111a formed in the protruding portion 111 in one unit body 100 and a convex portion formed in the recess 121 in the other unit body 100. 122a is loosely fitted, but the relationship between the concave portion and the convex portion may be reversed. That is, two units are formed by forming a convex portion in the protruding portion 111 in one unit body 100 and forming a concave portion in the concave portion 121 in the other unit body 100 and loosely fitting these convex portions and the concave portion. The body 100 may be connected.

  Further, in the above embodiment, one unit body 100 is configured by connecting a plurality (three in the embodiment) of units 100U, but one unit body 100 is configured by only one unit 100U. May be.

  Moreover, although the said embodiment demonstrated the example which applied the bottom structure 1 to the electric bed 2, the bottom structure 1 in this Embodiment is applicable also to a non-electric bed. Moreover, the bottom structure 1 can be widely applied not only to a bed, but also to furniture that a person such as a chair sits on, or other tools that support a person's waist.

  In addition, it is realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, and forms obtained by making various modifications conceived by those skilled in the art to each embodiment. Forms are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Bottom structure 2 Electric bed 10 Connection unit 100 Unit body 100U unit 100P Connection board 110 1st connection part 111 Protrusion part 111a Hole part 112 Reinforcement rib 120 2nd connection part 121 Recessed part 121a Upper piece 121b Lower piece 121c 1st side piece 121d 2nd side piece 122a Convex part 123 Through-hole

Claims (8)

A bottom structure including a connecting unit configured by connecting a plurality of unit bodies each composed of one or a plurality of units in one direction,
A plurality of the connecting units are provided at predetermined intervals in another direction orthogonal to the one direction,
The unit includes a first connecting portion provided on one side in the one direction and a second connecting portion provided on the other side in the one direction,
Each of the first connecting portions of each of the two unit bodies adjacent in the one direction among the plurality of unit bodies protrudes toward one side of the one direction, and extends in the other direction. Having a pair of plate-like protrusions arranged alongside,
The second connection part of one of the two adjacent unit bodies has a recess facing the other pair of protrusions of the two adjacent unit bodies,
The concave portion of the second connecting portion is a pair of upper and lower pieces that sandwich the pair of projecting portions from above and below, and a pair of both ends of the upper piece and the lower piece in the other direction. A first side piece and a second side piece;
Each of the pair of protrusions is provided with a hole or a protrusion recessed in the other direction,
On the inner surface of each of the pair of first side pieces and second side pieces, a convex portion or a hole portion recessed in the other direction is provided,
The hole has an oval shape in plan view,
The convex portion has a circular shape in plan view,
The pair of protrusions of the first connecting portion of the unit in one of the two adjacent unit bodies, and the concave portion of the second connecting portion of the unit in the other of the two adjacent unit bodies. Are loosely connected and
The hole structure of one said unit and the said convex part of the other said unit are latching. Bottom structure. Each of the pair of protrusions is provided with the hole that is recessed in the other direction,
The bottom structure according to claim 1, wherein the convex portion is provided on an inner surface of each of the pair of first side pieces and second side pieces. The bottom structure according to claim 2, wherein a length of the lower piece in the one direction is longer than a length of the upper piece in the one direction. The bottom structure according to claim 3, wherein the lower piece is provided with a through hole. The bottom structure according to any one of claims 1 to 4, wherein the first connecting portion has a reinforcing rib provided between the pair of projecting portions. Each of the said unit bodies is comprised by connecting the said some unit in the said other direction, The bottom structure of any one of Claims 1-5. The bottom structure according to claim 6, wherein the plurality of units are connected by a connecting plate that stands in a vertical direction. A bed comprising the bottom structure according to any one of claims 1 to 7.

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