JP7127011B2 - mattress and bed equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mattress and a bed apparatus placed on a floor board surface of the bed apparatus.

Conventionally, movable bed systems equipped with auxiliary functions such as back-raising and knee-raising functions have been developed so that users such as the elderly and physically handicapped can easily change their posture on the bed system. Are known. This type of bed apparatus has a plurality of bottoms including a back bottom, a waist bottom and a leg bottom, and a driving mechanism rotates each bottom relative to each other in response to operation of an input device such as a remote controller.

Further, there has been proposed a bed apparatus in which the floor plate surface formed by each bottom has a flat shape and which can be transformed from a lying position to a sitting position (see, for example, Patent Document 1). In the sitting position, each bottom moves to the foot side of the bed apparatus, and the back bottom rises. This allows the user to sit on each bottom with their feet on the floor on which the bed device is placed.

A mattress is placed on the floor board surface in a movable bed apparatus as well as in a general bed apparatus (see Patent Document 2, for example). Since the mattress and the floorboard surface may be displaced according to the movement of the floorboard surface, it is necessary to devise ways to fix the mattress and the floorboard surface.

JP 2018-15269 A Japanese Patent No. 6013371

For example, in a structure in which the leg bottoms are accommodated under the waist bottom in the sitting position, such as the bed apparatus described in Patent Document 1, if the mattress is thick, the floor surface and the mattress may interfere with each other when the mattress is transformed into the sitting position. Furthermore, a thick mattress may hinder transformation to a sitting position. On the other hand, a thin mattress does not provide comfortable cushioning.

Further, when the leg bottom is housed under the waist bottom, the mattress on the leg bottom is suspended. At this time, a gap is generated between the mattress cover and the cushion body inside it, and the surface of the mattress may come into contact with the floor surface or the like.

In addition to these, there is room for various improvements in the mattress used in the movable bed system and in the fixing structure of the mattress and the floor board surface of the bed system.

Accordingly, the main object of the present invention is to provide a mattress suitable for use in a movable bed apparatus, and further to provide a bed apparatus capable of satisfactorily fixing the mattress and the floor board surface. and

A mattress according to one embodiment is to be placed on the floorboard surface of a movable bed apparatus in which the shape of the floorboard surface changes, and comprises a longitudinally elongated cushion body, a cover covering the cushion body, and a fixture for attaching the cover to the floor plate surface. The cushion body includes a reduced-thickness portion whose thickness decreases toward one end in the longitudinal direction.

The mattress is provided with a first engaging element provided at a position overlapping the fixture on the lower surface of the reduced thickness portion, and at a position facing the first engaging element on the inner surface of the cover. A second engagement element engageable with the engagement element may further be provided.

The cushion body may have a plurality of grooves extending in a width direction crossing the longitudinal direction and arranged in the longitudinal direction on the lower surface of the reduced thickness portion.

A bed apparatus according to one embodiment comprises a bottom unit forming a floorboard surface on which the mattress is placed, the bottom unit having an opening penetrating between the floorboard surface and the opposite back surface, and a and a hook that is provided and has a claw portion that protrudes toward the back surface side at the tip thereof and that can hook the attachment tool.

ADVANTAGE OF THE INVENTION According to this invention, the mattress suitable for utilization to a movable bed apparatus can be provided. Moreover, it is possible to provide a bed apparatus capable of satisfactorily fixing the mattress and the floorboard surface.

FIG. 1 is a schematic perspective view of a bed apparatus according to one embodiment. FIG. 2 is another schematic perspective view of the bed apparatus. FIG. 3 is a schematic side view of the bed apparatus; FIG. 4 is a side view schematically showing some examples of the shape of the bottom unit provided in the bed apparatus. FIG. 5 is a schematic plan view of the bed apparatus with the bottom unit removed. FIG. 6 is a schematic plan view of a midsection fixing structure provided in the bottom unit. FIG. 7 is a schematic cross-sectional view of the midsection fixing structure along line IIV-IIV in FIG. FIG. 8 is a schematic perspective view of a foot-side fixing structure provided in the bottom unit. Figure 9 is a schematic perspective view of a mattress according to one embodiment; Figure 10 is a schematic cross-sectional view along the length of the mattress. FIG. 11 is a schematic cross-sectional view along the longitudinal direction of a mattress according to another example. FIG. 12 is a schematic bottom view of a cushion body included in the mattress. Figure 13 is a schematic bottom view of a cover provided with the mattress. Figure 14 is a schematic side view of the bottom unit and the mattress in a sitting position;

A mattress and a movable bed apparatus according to one embodiment of the present invention will be described with reference to the drawings.
1 and 2 are schematic perspective views of a bed apparatus B according to this embodiment. In the following description, the X, Y and Z directions are defined as shown. The X direction is the direction from the head side of the bed apparatus B to the foot side. The Y direction is the width direction of the bed apparatus B. As shown in FIG. The Z direction is the height direction of the bed apparatus B. FIG. The side indicated by the arrow in the Y direction (the left side as seen from the user in the supine position) is sometimes referred to as the "left", and the opposite side (the right side as seen from the user in the supine position) is sometimes referred to as the "right". Also, the side indicated by the arrow in the Z direction is sometimes referred to as "upper" and the opposite side is referred to as "lower."

The bed apparatus B includes a bottom unit 1, a drive mechanism 2, a bed frame 3, a base frame 4, an input device 5, and a control device 6 (see FIG. 2). The upper surface of the bottom unit 1 constitutes a floor plate surface on which a mattress M, which will be detailed later, is placed.

In this embodiment, the bottom unit 1 includes a back bottom 10 that supports the back of the user, a waist bottom 11 that supports the waist of the user, and leg bottoms 12 that support the legs of the user. .

The back bottom 10 includes a central bottom 10C and a pair of side bottoms 10L and 10R. The side bottoms 10L and 10R are connected to the left and right sides of the center bottom 10C in the width direction (Y direction) so as to be rotatable about axes parallel to the longitudinal direction (direction perpendicular to the Y direction) of the center bottom 10C. ing.

The waist bottom 11 includes a first waist bottom 13 and a second waist bottom 14 . The leg bottoms 12 include thigh bottoms 15 that support the user's thighs, knee bottoms 16 that support the user's knees or calves, and first plates that support the user's feet. 17 and a second plate 18 .

Center bottom 10C and first waist bottom 13, first waist bottom 13 and second waist bottom 14, second waist bottom 14 and thigh bottom 15, thigh bottom 15 and knee bottom 16, knee bottom 16 and first waist bottom The plate 17 is connected so as to be rotatable around an axis parallel to the Y direction. The second plate 18 is slidable with respect to the first plate 17 . At least a portion of the first plate 17 and the second plate 18 overlap.

In FIG. 1, the back bottom 10, waist bottom 11 and leg bottom 12 are horizontal (parallel to the XY plane). On the other hand, in FIG. 2, the back bottom 10 and the first waist bottom 13 stand up in the Z direction, and the leg bottom 12 is bent so that the knee bottom 16 becomes the top.

The drive mechanism 2 supports the bottom unit 1 and deforms the bottom unit 1 into various shapes described later. The bed frame 3 is arranged below the bottom unit 1 . The base frame 4 supports the bed frame 3. The base frame 4 has legs 4a in contact with the floor surface at the four corners of the bed apparatus B. As shown in FIG. The base frame 4 may have casters instead of the legs 4a.

The input device 5 is, for example, a remote controller, and has a plurality of buttons for inputting commands for transforming the bottom unit 1 and raising and lowering the bed frame 3 with respect to the base frame 4 .

The control device 6 is attached to the bed frame 3, for example. The control device 6 controls the drive mechanism 2 according to commands input from the input device 5 . The input device 5 and the control device 6 are communicatively connected via, for example, a cord 5b. However, the input device 5 and the control device 6 may be wirelessly connected for communication.

3 is a schematic side view of the bed apparatus B. FIG. The driving mechanism 2 includes a first lifting link 21R and a second lifting link 22R that connect one side of the bed frame 3 and the base frame 4 in the Y direction, and the other side of the bed frame 3 and the base frame 4 in the Y direction. It has a first lifting link 21L and a second lifting link 22L that connect the parts (see also FIG. 5).

Further, the driving mechanism 2 includes, as elements for supporting the bottom unit 1, a pair of fixing pins 35, a back raising frame 41, a pair of knee raising arms 51R and 51L arranged in the Y direction, and a pair of arm raising arms 51R and 51L arranged in the Y direction. 1st links 36R, 36L and a pair of second links 37R, 37L arranged in the Y direction (see also FIG. 5).

The pair of fixing pins 35 are passed through a pair of holes 14a (see FIGS. 1 and 2) provided in the second waist bottom 14, respectively. The back raising frame 41 supports the back surface of the back bottom 10 (central bottom 10C). The knee raising arms 51R and 51L support the back surface of the thigh bottom 15. As shown in FIG. The first links 36L, 36R rotatably support the first plate 17. As shown in FIG. The second links 37L, 37R rotatably support the second plate 18. As shown in FIG.

The driving mechanism 2 adjusts the positional relationship and inclination angle of the back raising frame 41, the knee raising arms 51L and 51R, the first links 36L and 36R and the second links 37L and 37R, thereby making the bottom unit 1 into various shapes. It is possible to transform.

FIG. 4 is a side view schematically showing an example of the shape of the bottom unit 1. FIG. In the bottom unit 1 shown in FIG. 4(a), the back bottom 10, the waist bottom 11, and the leg bottoms 12 are all horizontally arranged as in the example of FIG. Hereinafter, the shape of the bottom unit 1 in which at least the back bottom 10 is horizontal (parallel to the XY plane) is referred to as the lying position.

In the bottom unit 1 shown in FIG. 4(b), the back bottom 10 rises in the Z direction, and the waist bottom 11 and leg bottoms 12 are bent, as in the example of FIG. Specifically, the first waist bottom 13 rises in the Z direction, and the leg bottom 12 has an upward convex shape so that the knee bottom 16 is positioned above the thigh bottom 15 and the plates 17 and 18 . is formed.

In the bottom unit 1 shown in FIG. 4( c ), the plates 17 and 18 are positioned below the waist bottom 11 and the thigh bottom 15 . The thigh bottom 15 is positioned, for example, in the vicinity of the foot-side end 3a of the bed frame 3, and forms a seating surface together with the waist bottom 11. As shown in FIG. Knee bottom 16 extends in the Z direction between thigh bottom 15 and first plate 17 . Hereinafter, such a shape of the bottom unit 1 is referred to as a sitting position.

The bottom unit 1 shown in FIG. 4(d) is also in a sitting position, and the entire bottom unit 1 is tilted forward more than the example of FIG. 4(c). In this embodiment, the term "forward tilt" means that the bottom unit 1 rotates so that at least the upper end of the back bottom 10 faces the feet and the lower end of the back bottom 10 faces the head. Such a shape deformation of the bottom unit 1 helps the user to stand up from a sitting position.

Thus, the bottom unit 1 can be transformed from the lying position shown in FIG. 4(a) to the sitting position shown in FIGS. 4(c) and 4(d) via the shape shown in FIG. 4(b).

In the following description, the action of raising the back bottom 10 as shown in FIGS. 4(b) and 4(c) is called back raising. Further, the action of raising the thigh bottom 15 in the Z direction as shown in FIG. 4B is called knee raising. Further, as shown in FIG. 4(d), the action of tilting the bottom unit 1 in the sitting position forward is called raising the waist.

FIGS. 4(a) to 4(c) show the distance D at which the first plate 17 and the second plate 18 overlap. The distance D and the overlapping area S of the plates 17 and 18 increase from the lying position shown in FIG. 4(a) to the sitting position shown in FIG. 4(c). That is, the first plate 17 and the second plate 18 slide in a direction in which the overlapping area increases when the lying position changes to the sitting position.

FIG. 5 is a schematic plan view of the bed apparatus B with the bottom unit 1 removed. The drive mechanism 2 includes a lifting mechanism 20 including a lifting motor M1, a slide mechanism 30 including a first slide motor M2 and a second slide motor M3, a back lifting mechanism 40 including a back lifting motor M4, and a knee lifting motor. It has a knee-lifting mechanism 50 including M5 and a waist-lifting mechanism 60 including a waist-lifting motor M6. Each motor M1 to M6 is an example of a drive source.

In the lifting mechanism 20, the first lifting links 21L, 21R and the second lifting links 22L, 22R are operated as the lifting motor M1 is driven, and the bed frame 3 is lifted or lowered with respect to the base frame 4.

The slide mechanism 30 has a first slide frame 31 and a second slide frame 32 . The first slide frame 31 is slidably attached to the bed frame 3 . The second slide frame 32 is slidably attached to the first slide frame 31 .

First slide frame 31 includes horizontal frame 33 and tilt frame 34 . A horizontal frame 33 is parallel to the XY plane. The tilt frame 34 can be tilted with respect to the horizontal frame 33 . The tilt frame 34 is provided with the aforementioned back raising frame 41, a pair of fixing pins 35, a pair of knee raising arms 51L and 51R, and the like.

In the slide mechanism 30, the slide frames 31 and 32, the second slide motor M3, and the like move in parallel with the X direction with respect to the bed frame 3 as the first slide motor M2 is driven. Further, the second slide frame 32 moves parallel to the X direction with respect to the first slide frame 31 as the second slide motor M3 is driven. By combining these two sliding motions, the first plate 17 and the second plate 18 are rotated via the first links 36R, 36L and the second links 37R, 37L, respectively, as shown in FIG. do.

In the back raising mechanism 40, the back raising frame 41 rotates as the back raising motor M4 is driven. Thereby, the back bottom 10 can be deformed between a horizontal state as shown in FIG. 1 and an upright state as shown in FIG.

In the knee raising mechanism 50, the knee raising arms 51L and 51R rotate as the knee raising motor M5 is driven. As a result, the thigh bottom 15 can be deformed between a horizontal state as shown in FIG. 1 and an upright state as shown in FIG.

In the waist raising mechanism 60, the tilt frame 34 rotates as the waist raising motor M6 is driven, and the tilt angle of the tilt frame 34 with respect to the horizontal frame 33 changes. As a result, the posture of the bottom unit 1 can be changed between the state shown in FIG. 4(c) and the forward tilted state shown in FIG. 4(d).

Here, a structure for fixing the mattress M to the bottom unit 1 will be described.
As shown in FIGS. 1 and 2, the back bottom 10 has a head fixing structure 70 for fixing the head part of the mattress M. As shown in FIGS. In this embodiment, the head side fixing structure 70 is configured by a plurality of through holes 71 provided in the central bottom 10C.

The thigh bottom 15 has a pair of midsection fixing structures 80R and 80L for fixing the midsection of the mattress M. As shown in FIG. The midsection fixing structure 80R is located on the right side of the center of the thigh bottom 15 in the Y direction. The midsection fixing structure 80L is located on the left side of the center of the thigh bottom 15 in the Y direction.

The second plate 18 has three foot fixing structures 90R, 90L, 90C for fixing the foot part of the mattress M. As shown in FIG. The foot side fixing structure 90R is located on the right side of the center of the second plate 18 in the Y direction. The foot side fixing structure 90L is located on the left side of the center of the second plate 18 in the Y direction. The foot side fixing structure 90C is located in the center of the second plate 18 in the Y direction.

FIG. 6 is a schematic plan view of the midsection fixing structure 80R. FIG. 7 is a schematic cross-sectional view of the midsection fixing structure 80R along line IIV-IIV in FIG. As shown in FIGS. 6 and 7, the midsection fixing structure 80R has an opening 81 and a hook 82 provided within the opening 81. As shown in FIGS.

As shown in FIG. 7, the opening 81 penetrates between the upper surface 15u (floor plate surface) of the thigh bottom 15 and the opposite rear surface 15r. As shown in FIG. 6, the hook 82 protrudes from the inner wall of the opening 81 in the direction toward the end 15a of the thigh bottom 15 in the Y direction (opposite direction to the Y direction). As shown in FIG. 7, the tip of the hook 82 is provided with a claw portion 83 protruding toward the rear surface 15r. The hook 82 does not protrude above the upper surface 15u. Moreover, the hook 82 does not protrude below the back surface 15r.

In addition, although the thigh bottom 15 has a hollow structure in the example of FIG. 7, it is not limited to this example. Also, the opening 81 may be a notch connected to the end 15 a of the thigh bottom 15 .

The midbelly fixing structure 80L is similar to the midbelly fixing structure 80R. As an example, the midsection fixing structure 80L has a shape line-symmetrical to the midsection fixing structure 80R with respect to an axis parallel to the X direction.

FIG. 8 is a schematic perspective view of foot side fixing structures 90R, 90L, 90C. The foot side fixing structure 90L has a base 91 and a plate member 92 . The base 91 is attached to the top surface of the second plate 18 . The plate member 92 has a first portion 93 , a second portion 94 and a third portion 95 .

The first portion 93 is connected to the base 91 . The second portion 94 faces the base 91 with a gap therebetween. The third portion 95 is inclined with respect to the first portion 93 and the second portion 94 and connects these portions 93 and 94 . Each of the portions 93-95 can be formed by bending a flat plate, for example.

The foot side securing structures 90R and 90C are similar to the foot side securing structure 90L. However, in the foot side fixing structure 90R, the gap between the base 91 and the second portion 94 faces one end 18a (right end) of the second plate 18 in the Y direction, and in the foot side fixing structure 90L The gap faces the other end 18b (left end) of the second plate 18 in the Y direction. In addition, in the foot-side fixing structure 90C, the gap faces the first plate 17 side (head side).

Next, the structure of the mattress M will be explained.
FIG. 9 is a schematic perspective view of the mattress M according to this embodiment. In FIG. 9, assuming that the mattress M is placed on the flat floor board surface of the bottom unit 1 as shown in FIG. 1, the X, Y and Z directions are shown as in FIG. there is The mattress M shown in FIG. 9 is turned over so that the back surface facing the floor board surface can be seen.

The mattress M has an elongated shape in the X direction. That is, in the example of FIG. 9, the X direction corresponds to the longitudinal direction of the mattress M, the Y direction corresponds to the width direction of the mattress M, and the Z direction corresponds to the thickness direction of the mattress M. In this embodiment, the shape of the mattress M in plan view is rectangular. In the following description, the head-side end of the mattress M is called a first end E1, and the foot-side end is called a second end E2.

The mattress M has a cover 100. - 特許庁The cover 100 covers a cushion body 200 which will be described later. The cover 100 has fasteners 101 along its perimeter. By opening the fastener 101, the internal cushion body 200 can be taken out. In the example of FIG. 9, the cover 100 is provided with a plurality of quilting lines 102 parallel to the Y direction. However, the cover 100 does not have to have the quilting lines 102 .

A back surface 103 of the cover 100 shown in FIG. 9 is provided with a head side fixture 110, a midsection fixture 120 and a foot side fixture 130 for fixing the mattress M to the bottom unit 1. As shown in FIG.

In the example of FIG. 9, the head side fixture 110 is composed of a pair of belts 111 and 112 . The belts 111 and 112 are provided at positions overlapping any one of the plurality of through holes 71 of the head side fixing structure 70 when the mattress M is placed on the bottom unit 1 . The belts 111 and 112 can be formed, for example, by stitching central portions of long belt-like members to the cover 100 .

The belts 111 and 112 are passed through the through holes 71 of the head fixing structure 70 and connected to each other on the back side of the central bottom 10C. Although the belts 111 and 112 can be connected by various methods, in one example, the belts 111 and 112 are connected by providing hook-and-loop fasteners on the belts 111 and 112 and engaging them.

In the example of FIG. 9, the midsection attachment 120 is composed of a pair of belts 121R and 121L extending in the X direction. The belts 121R and 121L are provided at positions overlapping the midsection fixing structures 80R and 80L, respectively, when the mattress M is placed on the bottom unit 1. As shown in FIG. Both ends of the belts 121R and 121L are sewn to the cover 100. As shown in FIG.

When fixing the mattress M, the belt 121R is positioned below the hook 82 through between the inner wall of the opening 81 and the hook 82 in the midsection fixing structure 80R. As a result, the belt 121R is hooked on the hook 82. As shown in FIG. Similarly, the belt 121L is also hooked on the hook 82 of the midbelly fixing structure 80L.

In the example of FIG. 9, the foot side fixture 130 is composed of belts 131R and 131L extending in the X direction and a belt 131C extending in the Y direction. The belts 131R, 131L, 131C are provided at positions overlapping the foot side fixing structures 90R, 90L, 90C, respectively, when the mattress M is placed on the bottom unit 1. As shown in FIG. Both ends of the belts 131R, 131L, 131C are sewn to the cover 100. As shown in FIG.

When fixing the mattress M, the belt 131R is passed through the gap between the base 91 and the second portion 94 in the foot side fixing structure 90R, the belt 131L is passed through the gap in the foot side fixing structure 90L, and the belt 131L is passed through the gap in the foot side fixing structure 90C. A belt 131C is passed through the gap.

FIG. 10 is a schematic cross-sectional view along the longitudinal direction (X direction) of the mattress M. FIG. The mattress M has a cushion body 200 covered with a cover 100. - 特許庁In the example of FIG. 10, the cushion body 200 includes an upper first layer 210 and a lower second layer 220 . The first layer 210 and the second layer 220 are adhered together.

The first layer 210 and the second layer 220 can be made of polyurethane foam, for example. The first layer 210 preferably has lower hardness and higher elasticity than the second layer 220 in order to achieve good cushioning properties of the mattress M. The second layer 220 preferably has a hardness higher than that of the first layer 210 so as to prevent loosening when the mattress M is deformed together with the bottom unit 1 . As an example, the hardness of the first layer 210 is 70N, and the hardness of the second layer 220 is 200N, which is more than double the hardness of the first layer 210 . Also, the density of the first layer 210 is 30 kg/m ³ and the density of the second layer 220 is 27 kg/m ³ .

The cushion body 200 has a reduced-thickness portion DP whose thickness gradually decreases toward the second end E2. In the example of FIG. 10, the reduced thickness portion DP is positioned closer to the second end E2 than the center C of the cushion body 200 in the X direction. However, the reduced thickness portion DP may overlap the center C.

The reduced thickness portion DP is realized mainly by changing the thickness of the first layer 210 . In the example of FIG. 10, the lower surface 211 of the first layer 210 is generally flat. On the other hand, the upper surface 212 of the first layer 210 is inclined with respect to the lower surface 211 at the reduced thickness portion DP. The thickness at the first end E1 of the first layer 210 is Wa1, and the thickness at the second end E2 of the first layer 210 is Wa2, which is smaller than Wa1 (Wa1>Wa2). In the region other than the reduced thickness portion DP, the thickness of the first layer 210 is constant at Wa1. In the reduced thickness portion DP, the thickness of the first layer 210 gradually decreases from Wa1 to Wa2.

The thickness of the second layer 220 is generally constant. As an example, the thickness of the second layer 220 is less than Wa1 and greater than Wa2. The thickness of the second layer 220 may be gradually reduced in the reduced thickness portion DP as with the first layer 210 .

Also in the cover 100, the thickness (the height of the internal space) of the portion corresponding to the reduced thickness portion DP gradually decreases toward the second end E2. That is, the thickness at the first end E1 of the cover 100 is Wb1, and the thickness at the second end E2 is Wb2, which is smaller than Wb1 (Wb1>Wb2). By defining the shape of the cover 100 in this way, the looseness of the cover 100 at the reduced thickness portion DP can be suppressed.

The cover 100 has an inner surface 104 opposite the back surface 103 also shown in FIG. The second layer 220 has a lower surface 221 facing the inner surface 104 . The lower surface 221 has a plurality of grooves 222 in the reduced thickness portion DP.

FIG. 11 is a schematic cross-sectional view along the longitudinal direction of a mattress M according to another example. In the example of this figure, the cushion body 200 has a third layer 230 in addition to the first layer 210 and the second layer 220 . A third layer 230 is disposed between the first layer 210 and the second layer 220 .

The first layer 210, the second layer 220 and the third layer 230 can be made of polyurethane foam, for example. The first layer 210 preferably has a lower resilience than the second layer 220 and the third layer 230 in order to achieve good body pressure distribution of the mattress M. The second layer 220 preferably has hardness higher than that of the first layer 210 and the third layer 230 so that the second layer 220 is less likely to loosen when the mattress M is deformed together with the bottom unit 1 . The third layer 230 preferably has a hardness lower than that of the second layer 220 and higher than that of the first layer 210 and high elasticity in order to realize good cushioning properties of the mattress M. As an example, the hardness of the first layer 210 is 30N, the hardness of the second layer 220 is 200N, and the hardness of the third layer 230 is 120N. The density of the first layer 210 is 60 kg/m ³ , the density of the second layer 220 is 27 kg/m ³ , and the density of the third layer 230 is 40 kg/m ³ .

The reduced thickness portion DP is realized mainly by changing the thickness of the third layer 230 . In the example of FIG. 11, the lower surface 231 of the third layer 230 is generally flat. On the other hand, the upper surface 232 of the third layer 230 is inclined with respect to the lower surface 231 at the reduced thickness portion DP. The thickness of the third layer 230 at the first end E1 is Wc1, and the thickness at the second end E2 of the third layer 230 is Wc2, which is smaller than Wc1 (Wc1>Wc2). In the region other than the reduced thickness portion DP, the thickness of the third layer 230 is constant at Wc1. In the reduced thickness portion DP, the thickness of the third layer 230 gradually decreases from Wc1 to Wc2.

In the example of FIG. 11, the thicknesses of the first layer 210 and the second layer 220 are generally constant. As an example, the thicknesses of the first layer 210 and the second layer 220 are less than Wc1 and greater than Wc2. Moreover, the thickness of the first layer 210 is less than the thickness of the second layer 220 . The thicknesses of the first layer 210 and the second layer 220 may be gradually reduced in the reduced thickness portion DP as with the third layer 230 .

FIG. 12 is a schematic bottom view of the cushion body 200. FIG. 13 is a schematic bottom view of cover 100. FIG. As shown in FIG. 12, the grooves 222 described above extend in the Y direction and are aligned in the X direction on the lower surface of the reduced thickness portion DP (the lower surface 221 of the second layer 220).

In the example of FIG. 12, a plurality of holes 223 are provided that overlap each groove 222 . The hole 223 is, for example, V-shaped and penetrates at least the second layer 220 . The plurality of holes 223 are arranged at regular intervals in the X and Y directions.

As shown in FIG. 12, first engaging elements 310, 320, 330 are provided on the lower surface of the cushion body 200 (the lower surface 221 of the second layer 220). 13, the inner surface 104 of the cover 100 is provided with second engaging elements 410, 420, 430 that are engageable with the first engaging elements 310, 320, 330, respectively. .

The first engaging elements 310, 320, 330 are, for example, hook-like hook-and-loop fasteners on the male side. Further, the second engaging elements 410, 420, 430 are, for example, female side hook-and-loop fasteners having loop-shaped bristles. The second engaging elements 410, 420, 430 may be a fabric such as French pile that is engageable with the male hook-and-loop fastener. In this case, the second engaging elements 410 , 420 , 430 may be part of the inner surface 104 of the cover 100 .

As shown in FIG. 13, the second engaging element 410 is provided at a position overlapping the head-side fixture 110 (belts 111 and 112). Also, the second engaging element 420 is provided at a position that overlaps with the midsection attachment 120 (belts 121R and 121L). In addition, the second engaging element 430 is provided at a position overlapping the foot side fixture 130 (belts 131R, 131L, 131C).

The first engagement element 310 shown in FIG. 12 is provided at a position facing the second engagement element 410 . The first engaging element 320 is provided at a position facing the second engaging element 420 . The first engaging element 330 is provided at a position facing the second engaging element 430 . Like the second engagement elements 410, 420, 430, the first engagement elements 310, 320, 330 overlap the head attachment 110, the midsection attachment 120 and the foot attachment 130, respectively.

The head fitting 110, the first engaging element 310 and the second engaging element 410 are located between the center C and the first end E1. The midsection fitting 120, the first engaging element 320 and the second engaging element 420 are located near the center C in the reduced thickness portion DP. The foot side fixture 130, the first engaging element 330 and the second engaging element 430 are located near the second end E2 in the reduced thickness portion DP. A plurality of grooves 222 and a plurality of holes 223 are located between the first engaging elements 320,330.

FIG. 14 is a schematic side view of the bottom unit 1 and mattress M in a sitting position. Here, the two-layered cushion body 200 shown in FIG. 10 is shown as an element constituting the mattress M, and the illustration of the cover 100 is omitted. Even when the mattress M includes the three-layered cushion body 200 shown in FIG. 11, the same effects as those described below can be obtained.

The mattress M and the bottom unit 1 are fixed at a first position P1, a second position P2 and a third position P3. The first position P1 is a position where the head-side fixture 110 (belts 111 and 112) is attached to the head-side fixing structure 70. As shown in FIG. The second position P2 is a position where the midsection fixture 120 (belts 121R, 121L) is attached to the midsection fixing structures 80R, 80L. The third position P3 is a position where the foot side fixture 130 (belts 131R, 131L, 131C) is attached to the foot side fixing structures 90R, 90L, 90C.

In the sitting position, the bottom unit 1 is greatly bent over the thigh bottom 15, the knee bottom 16, the first plate 17 and the second plate 18. The reduced-thickness portion DP overlaps with such a largely bent region. Since the cushion body 200 is thin in the reduced-thickness portion DP, the cushion body 200 easily bends according to the change in the shape of the bottom unit 1 .

The groove 222 of the cushion body 200 overlaps the knee bottom 16, for example as shown. In the sitting position, the second layer 220 is compressed at the position overlapping the knee bottom 16 . At this time, the deformation of the cushion body 200 is facilitated by the crushing of the grooves 222 . Further smoothening of the deformation of the cushion body 200 is expected when the above-described holes 223 are provided.

When transformed into the sitting position, the first plate 17 and the second plate 18 rotate downward from the thigh bottom 15 . At this time, if the mattress M is thick, the mattress M may come into contact with the floor surface. On the other hand, in this embodiment, since the mattress M near the first plate 17 and the second plate 18 is thin, the mattress M hardly interferes with the floor surface during rotation.

In regions corresponding to the back bottom 10, the first waist bottom 13, and the second waist bottom 14 where the user's weight is likely to be applied to the mattress M, the cushion body 200 is thicker than the reduced thickness portion DP. Therefore, it is possible to provide comfortable cushioning to the user.

In this embodiment, the cover 100 and the cushion body 200 are connected to the first engaging elements 310, 320, 330 and the second engaging elements 310, 320, 330 at positions overlapping the head side fixture 110, the midsection fixture 120 and the foot side fixture 130, respectively. They are connected by joint elements 410 , 420 , 430 . Therefore, the cover 100 and the cushion body 200 are less likely to separate over the entire mattress M.

In particular, since the mattress M is suspended from the bottom unit 1 in the sitting position near the plates 17 and 18, the cover 100 and the cushion body 200 are separated from each other and the mattress M tends to loosen. However, if the first engaging element 330 and the second engaging element 430 are engaged at the third position P3 shown in FIG. 14, the slackness of the mattress M can be suppressed satisfactorily.

As shown in FIGS. 6 and 7, when the midsection fixing structures 80R and 80L have openings 81 and hooks 82 provided therein, the belts 121R and 121L are hooked on the hooks 82 to fix the mattress. Since the M can be fixed, the work of arranging the mattress M is easy. Further, if the hook 82 is located within the opening 81, the floor board surface of the bottom unit 1 does not have large irregularities, so that the comfortable feeling of use of the bed apparatus B is not impaired.

In the foot-side fixing structures 90R, 90L, and 90C shown in FIG. 8 as well, the mattress M can be fixed by hooking the belts 131R, 131L, and 131C on the plate member 92, so the operation of placing the mattress M is easy. Furthermore, since the gaps between the base 91 and the plate member 92 are oriented in different directions in each of the foot-side fixing structures 90R, 90L, and 90C, good resistance is provided against forces in various directions that shift the mattress M and the bottom unit 1. demonstrate.
In addition to the above, various favorable effects can be obtained from this embodiment.

In addition, this embodiment does not limit the scope of the present invention to the configuration disclosed in the embodiment. The present invention can be implemented by modifying the configuration disclosed in this embodiment into various aspects.

B... bed apparatus, M... mattress, DP... reduced thickness portion, 1... bottom unit, 70... head side fixed structure, 80R, 80L... midsection fixed structure, 90R, 90L, 90C... foot side fixed structure, 100... cover, 200... Cushion body, 310, 320, 330... First engagement element, 410, 420, 430... Second engagement element.

Claims (5)

A mattress placed on the floorboard surface of a movable bed apparatus in which the shape of the floorboard surface changes,
a longitudinally elongated cushion body;
a cover that covers the cushion body;
a fixture provided on the back surface of the cover for attaching the cover to the floorboard surface;
The cushion body is
a first layer;
a second layer positioned between the first layer and the back surface and having a higher hardness than the first layer;
a reduced-thickness portion including the first layer and the second layer, the thickness of which gradually decreases toward one end of the cushion body in the longitudinal direction ;
with
The mattress , wherein the thickness of said first layer in said reduced thickness portion tapers towards said ends . A mattress placed on the floorboard surface of a movable bed apparatus in which the shape of the floorboard surface changes,
a longitudinally elongated cushion body;
a cover that covers the cushion body;
a fixture provided on the back surface of the cover for attaching the cover to the floorboard surface;
The cushion body is
a first layer;
a second layer positioned between the first layer and the back surface and having a higher hardness than the first layer;
a third layer positioned between the first layer and the second layer and having a hardness lower than that of the first layer and higher than that of the second layer;
a reduced-thickness portion including the first layer, the second layer, and the third layer, the thickness of which gradually decreases toward one end of the cushion body in the longitudinal direction;
with
The mattress, wherein the thickness of said third layer in said reduced thickness portion tapers towards said end. A mattress placed on the floorboard surface of a movable bed apparatus in which the shape of the floorboard surface changes,
a longitudinally elongated cushion body;
a cover that covers the cushion body;
a fixture provided on the back surface of the cover for attaching the cover to the floorboard surface;
The cushion body includes a reduced-thickness portion whose thickness gradually decreases toward one end of the cushion body in the longitudinal direction,
The cushion body is
a plurality of grooves extending in a width direction intersecting with the longitudinal direction on the lower surface of the reduced thickness portion and aligned in the longitudinal direction;
a plurality of holes overlapping the plurality of grooves and arranged at intervals in the longitudinal direction and the width direction;
a mattress. a first engagement element provided at a position overlapping the fixture on the lower surface of the reduced thickness portion;
a second engagement element provided at a position facing the first engagement element on the inner surface of the cover and engageable with the first engagement element;
4. A mattress according to any one of claims 1-3. A cushion body that is elongated in the longitudinal direction and includes a reduced-thickness portion that decreases in thickness toward one end in the longitudinal direction, a cover that covers the cushion body, and a fixture provided on the cover. comprising a bottom unit forming a floorboard surface on which the mattress comprising
The bottom unit is
an opening penetrating between the floor plate surface and the opposite back surface;
a hook provided in the opening and having a claw portion protruding toward the back side at the tip thereof and capable of hooking the attachment;
A bed apparatus comprising:

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