JP6093733B2 - Mattress back up bedding - Google Patents

Description

  The present invention relates to a bedding product for raising a back of a mattress used for raising one end of a longitudinal direction upward to raise a user's upper body.

  For example, if you want to support a user who has lost physical strength to raise his / her upper body, or if he / she wants to maintain his / her upper body posture for reading or eating, the one end side of the mattress in the longitudinal direction is moved upward. I try to bend it.

  In order to curve the one end side in the longitudinal direction of the mattress upward, it is known to use a so-called wake-up bed apparatus (Patent Document 1). As another means, the mattress is constituted by a base unit, a bendable cushion body provided on the upper surface of the base unit, and an exterior body covering them. The base unit has a fixed hook part and a movable hook part, and the movable hook part is driven by a built-in driving source via a power transmission mechanism, so that the movable hook part, that is, one end side of the mattress is raised and lowered. It is known to make (Patent Document 2).

  In order to raise the user's upper body by the above-described means, if one end of the mattress in the longitudinal direction is bent upward, the mattress has a predetermined thickness dimension, so that the inner side of the curve corresponds to the thickness dimension. A compressive force is generated on the upper surface toward the inner side (center direction) of the mattress in the longitudinal direction, and a tensile force along the longitudinal direction is generated on the lower surface serving as the outer surface.

  Therefore, a compressive force generated on the upper surface of the mattress acts on the back surface of the user, and the back surface is pressed downward by the compressive force, and the abdomen is pulled backward (inside the curve), so that the abdomen is compressed. Sometimes.

  Therefore, when the mattress is bent and the upper body of the user is raised, a mattress for preventing a feeling of pressure on the user's abdomen has been put into practical use. A conventional mattress has, for example, an interior body and a bag-shaped exterior body formed of stretchable fabric covering the interior body, and a first layered member and a second layer that are superposed on the interior body in the vertical direction. (A patent document 2).

  Accordingly, when the mattress is bent, the first layered member located on the upper side moves while being extended with respect to the outer body, and thus the mattress is displaced from the second layered member. The compressive force applied to the back surface is reduced compared to the overall thickness of the mattress.

Japanese Patent No. 3525027 JP 2009-136628 A

  By the way, the conventional mattress for reducing the compressive force applied to the user's back when raising the back must be constituted by the first layered member and the second layered member that can slide the interior body as described above. There wasn't.

  That is, the conventional mattress for raising the back has to adopt a structure different from the existing mattress in order to reduce the compressive force applied to the user's back surface when raising the back. For this reason, a user who already owns a mattress has to purchase a new mattress for raising the back, which is inconvenient and disadvantageous in cost.

  An object of the present invention is to provide a mattress for raising a back of a mattress that can be attached to an existing mattress to reduce a compressive force applied to a user's back surface when the back is raised.

In the bed apparatus in which the headboard is provided at one end in the longitudinal direction of the bed frame, a floor plate body having a back floor portion that is driven up and down at one end in the longitudinal direction of the bed frame is provided. When the back floor portion is driven in the upward direction, one end portion in the longitudinal direction where the upper body of the user lying on the upper surface of the mattress is positioned on the mattress provided with the lower surface facing the upper surface of the floor plate body. A mattress back bedding that curves upwards,
Of the upper surface and the pair of end surfaces, the upper surface and one end surface or one end surface is formed in a bag shape, and is detachably attached to the other end located on the opposite side of the back floor in the longitudinal direction of the mattress. A holding member to be
Has a distal end and a rear end, can and the rear end portion is mounted the holding member provided integrally on the lower surface and opposite top surface of the mattress of the holding member to the other end of the mattress If the upper surface of the mattress is covered and the back floor portion is driven in the rising direction to bend one end portion in the longitudinal direction of the mattress upward, it corresponds to one end portion in the longitudinal direction of the mattress. and the sliding member tip which slides in the bid up direction the end of the mattress while receiving a load of the user,
Longitudinal end portion one end of which is connected to the tip portion corresponding to the, while wearing the pre-Symbol holding member to the other end of the mattress, the one end positioned in the rear floor portion of the mattress of the sliding member a displacement preventing member which part is other longitudinal end bent on the lower surface side of the one end of the mattress is detachably connected to the lower surface of the holding member except,
Comprising
The sliding member includes a plurality of sliding members that are superposed on the upper surface of the mattress in the vertical direction along the thickness direction of the mattress, and the upper and lower surfaces of the sliding members that are in contact with each other are slidable. It is formed on the smooth surface,
One end of the slip-preventing member is connected to the tip of the sliding member located on the uppermost side among the plurality of the sliding members that are superposed on each other.

  According to the embodiment, when the holding member is mounted on the other end side of the mattress, the sliding member provided integrally with the holding member is disposed on the upper surface of the mattress.

  As a result, when the one end side in the longitudinal direction of the mattress is bent upward, the sliding member applied with the user's load is slid against the upper surface of the mattress and competes upward. It is possible to reduce the compression force generated on the back of the user.

  Moreover, by attaching and detaching the holding member to the other end of the existing mattress, the sliding member provided integrally with the holding member can be easily and quickly attached to the existing mattress, Can be removed.

The side view which shows the bed apparatus which concerns on 1st Embodiment of this invention. The perspective view of the mattress of the bed apparatus of FIG. 1, and the bedding used for this mattress. The side view of the mattress to which the bedding was attached. The side view of the mattress which shows the state before connecting a slip prevention member to a holding member. The side view of the mattress which shows the state which curved and raised the one end part side of the mattress. The side view which shows the connection state of the width direction one end part of a pair of upper and lower sliding members, and the upper end of the side part of a holding member by cross-sectionally showing the said sliding member. Sectional drawing which shows a part of slide member of 2nd Embodiment of this invention. The side view of the mattress to which the bedding which shows the 3rd Embodiment of this invention was attached. The side view of the mattress with which the bedding shown in 4th Embodiment of this invention was attached.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
1 to 6 show a first embodiment of the present invention. FIG. 1 shows a wake-up type bed apparatus 1 in which a mattress 31 is used. The bed apparatus 1 includes a base 2. The base 2 is formed in a rectangular frame shape, and casters 3 with stoppers are provided at four corners of the lower surface.

  A bed frame 4 is provided on the upper surface of the base 2. A head board 5a is erected on one end side in the longitudinal direction of the bed frame 4, and a foot board 5b is erected on the other end.

  A floor plate body 6 is provided on the upper surface side of the bed frame 4. The floor plate 6 is divided into five along the longitudinal direction of the bed frame 4, and the center is a fixed floor portion 7 fixed to the bed frame 4.

  A lumbar floor portion 8 and a back floor portion 9 are connected to the headboard 5a side of the fixed floor portion 7 so as to be sequentially rotatable. A first leg floor part 11 and a second leg floor part 12 are sequentially connected to the footboard 5b side of the fixed floor part 7 so as to be rotatable.

  The bed frame 4 is provided with a driving device 13. The drive device 13 has a case 14, and a drive motor 15 is provided on one side of the case 14. A first drive shaft 16 is provided at one end of the case 14 on the headboard 5a side, and a second drive shaft 17 is provided at the other end on the footboard 5b side. The first drive shaft 16 and the second drive shaft 17 are driven to rotate in a standing direction indicated by an arrow in the drawing when the drive motor 15 is operated.

  One end of a first arm 18 is connected to the first drive shaft 16, and one end of a second arm 19 is connected to the second drive shaft 17. A pair of first rollers 21 is rotatably provided on the other end side of the first arm 18, and the first roller 21 has a U-shaped cross section provided on the back surface of the back floor portion 9. The guide member 22 is movably engaged with the guide member 22. A second roller 23 is rotatably provided at the other end of the second arm 19, and the second roller 23 is in contact with the lower surface of the first leg floor 11.

  When the drive motor 15 is operated and the first arm 18 is driven in the standing direction, the back floor portion 9 is pressed by the first roller 21 and rotated in the rising direction. At the same time, the waist floor 8 is interlocked with the rotation of the back floor 9.

  When the second arm 19 is driven in the standing direction by the operation of the drive motor 15, the first leg floor 11 is supported by the second roller 23 as a fulcrum at the connection end with the fixed floor 7. It rotates in the ascending direction.

  When the first leg floor portion 11 is driven in the ascending direction, the second leg floor portion 12 is interlocked with the ascent of the one leg floor portion 11, so that these first and second leg floor portions 11 11 and 12 bend substantially in a letter shape.

  The second drive shaft 17 can be selectively driven when the drive motor 15 is operated to drive the first drive shaft 16. FIG. 1 shows a state in which only the first drive shaft 16 is operated to drive the back floor 9 in the upward direction, and the first leg floor 11 and the second leg floor 12 are not raised. Yes.

  The mattress 31 is placed on the upper surface of the floor plate body 6. The mattress 31 contains an elastic material such as urethane foam or a spring, and each floor portion of the floor plate body 6 is driven up and down, so that the mattress 31 can be elastically curved and deformed according to the up-and-down driving. It has become.

  A user U lies on the top surface of the mattress 31. As shown in FIG. 1, when the back floor portion 9 of the floor plate body 6 is driven upward, and the one end side in the longitudinal direction located on the back floor portion 9 side of the mattress 31 is bent upward. A compressive force is generated on the upper surface that is the inside of the curve of the mattress 31, and this compressive force acts on the back surface of the user U.

  Therefore, the mattress 31 has a back-up for reducing the compressive force generated on the upper surface from acting on the back surface of the user U when one end side in the longitudinal direction of the mattress 31 is curved upward. A bedding 32 is provided. As shown in FIG. 2, the back-raised bedding 32 includes a holding member 33 and a plurality of upper and lower sliding members 34 and a plurality of upper and lower sliding members 35 that are superposed vertically.

  The holding member 33 is relatively thick and is formed in a bag shape having an upper surface opened by a material such as a stretchable fabric or a synthetic resin sheet. That is, as shown in FIGS. 2 to 6, the holding member 33 includes a bottom surface portion 33a that covers the lower surface of the mattress 31 on the other end side, a pair of side surface portions 33b that covers both side surfaces, and an end surface portion 33c that covers the end surfaces. As described above, it is formed in a bag shape having an open upper surface.

  The holding member 33 may be formed of a relatively thin material such as a sheet made of a synthetic resin fiber such as polyester, a polyester knit fabric, or a stretchable urethane synthetic leather.

  As shown in FIG. 6, the superposed upper sliding member 34 and the lower sliding member 35 are formed of a pair of both side ends in the width direction of the rear end portion located on the other end side in the longitudinal direction of the mattress 31. The upper end of the side surface portion 33b is stitched and connected, and the rear end is stitched and connected to the upper end of the end surface portion 33c.

  Thereby, the holding member 33 is formed in a bag shape whose upper surface side is closed by the rear end portion of the pair of sliding members 34. That is, the holding member 33 and the pair of sliding members 34 are integrated.

  The holding member 33 may have a bag shape in which only one end surface is opened in advance, and the upper side of the holding member 33 may be connected to the three sides on the rear end side of the pair of sliding members 34 by connecting means such as sewing. .

  The upper sliding member 34 has at least lubricity among lubricity and stretchability such as a satin weave fabric, a sheet made of synthetic resin fibers such as polyester, a polyester knit fabric, and a stretchable urethane synthetic leather. It is formed by sewing a sheet-shaped material having a predetermined thickness and a sheet shape having the same length and width dimensions as the mattress 31 like a bed pad.

  The lower sliding member 35 is similar to the upper sliding member 34, for example, a satin weave fabric, a sheet made of synthetic resin fibers such as polyester, a polyester knit fabric, a stretchable urethane synthetic leather, and the like. Among them, a sheet-like material having at least lubricity is formed by sewing into a sheet-like material having a predetermined thickness and the same length and width as the mattress 31 like a bed pad. . That is, the upper and lower surfaces of the upper sliding member 34 and the lower sliding member 35 are smooth surfaces 34a and 35a, respectively.

  Accordingly, the lower sliding member 35 is in a state where the lower surface contacting the upper surface of the mattress 31 is easily slidable with respect to the upper surface of the mattress 31, and the upper sliding member 34 and the lower sliding member 35 are in contact with each other. The lower and upper surfaces are easy to slide.

That is, the upper and lower surfaces of the upper sliding member 34 and the lower sliding member 35 are formed on the smooth surfaces.
The upper sliding member 34 and the lower sliding member 35 are formed to be sufficiently thinner than the mattress 31.

  As shown in FIGS. 2 to 4, the upper slip member 34 has a top end portion located on one end side in the longitudinal direction of the mattress 31, and the upper slip is made of a soft sheet-like material such as cloth or synthetic resin. One end of the displacement preventing member 41 formed to have substantially the same width as that of the member 34 is connected by connecting means such as stitching or planar fastener.

  As shown in FIG. 2, a plurality of first planar fasteners 42 are provided at predetermined intervals on the other end of the slip prevention member 41, and the upper surface on the opening end side of the bottom surface portion 33 a of the holding member 33 is arranged on the upper surface. A plurality of second planar fasteners 43 that engage with the first planar fasteners 42 are provided.

  As shown by an arrow L in FIG. 2, the other end side of the mattress 31 is inserted into the inside from the opening end side of the holding member 33. In this state, the other end portion side of the slip prevention member 41 is bent as shown by an arrow M in FIGS. 2 and 4 and guided to the lower surface on the one end portion side of the mattress 31.

  Then, as shown in FIG. 3, the first planar fastener 43 is engaged with the second planar fastener 43. As a result, the upper sliding member 34 and the distal end side of the lower sliding member 35 located on the lower surface side thereof are held by the mattress 31 by the slip prevention member 41, so that the upper sliding member 34 and the lower sliding member 35 are held. Is prevented from shifting in the width direction of the upper surface of the mattress 31 or from being lifted from the upper surface of the mattress 31.

  The means for connecting the slip prevention member 41 and the holding member 33 is not limited to a planar fastener, and may be other connecting means such as a hook.

  As described above, the mattress 31 used in the wake-up type bed apparatus 1 includes the upper sliding member 34, the lower sliding member 35, and the bag-shaped holding member 33 provided integrally with the sliding members 34 and 35. The holding member 33 of the back-raised bedding 32 is detachably mounted on the other end side of the mattress 31 whose one end side in the longitudinal direction is curved upward.

  Accordingly, when the user U who is supine on the mattress 31 wants to raise his / her upper body, the back floor portion 9 of the bed apparatus 1 is rotated in the upward direction, and one end portion side of the mattress 31 is curved upward. As a result, the top end portions of the upper slide member 34 and the lower slide member 35 are abutted against the upper surface of the mattress 31 while sliding on the upper surface of one end portion of the mattress 31.

  At this time, since the upper sliding member 34 has a higher degree of curvature than the lower sliding member 35, the amount of sliding relative to the upper surface of the mattress 31 is longer than that of the lower sliding member 35. FIG. 5 shows the difference in the sliding length of the upper sliding member 34 from the lower sliding member 35.

  As described above, when the one end portion of the mattress 31 is bent upward, the upper sliding member 34 and the lower sliding member 35 slide with respect to the upper surface of the mattress 31.

  That is, since the upper sliding member 34 and the lower sliding member 35 are integrated with the holding member 33 attached to the other end of the mattress 31, the upper sliding member 34 and the lower sliding member 35 are integrated. The tip end side of the member 35 slides smoothly with respect to the upper surface of the mattress 31.

Therefore, even if a compressive force is generated on the upper surface by curving the mattress 31, the compressive force generated on the upper surface of the mattress 31 is utilized by sliding the upper slide member 34 and the lower slide member 35. Transmission to the back of the person U is reduced.
That is, the abdomen of the user U is less likely to be pressed by the compressive force generated on the upper surface of the mattress 31 by the back surface of the user U.

  Also, the back-raised bedding 32 is integrated with the holding member 33 by stitching the rear end sides of the two sliding members 34 and 35 together. That is, the backrest bedding 32 can be attached to the mattress 31 simply by attaching the holding member 33 in the form of a bag to the other end side of the mattress 31.

  Therefore, since the holding member 33 and the two sliding members 34 and 35 can be handled as one, there is a compressive force on the existing mattress 31 used in the wake-up type bed apparatus 1, that is, on the back surface of the user when raising the back. The mattress 31 having a structure that cannot be prevented from being added can be easily and quickly mounted and used.

  That is, it is possible to prevent the back surface of the user U from being compressed by the compressive force generated on the top surface of the mattress 31 when the back is raised only by attaching the holding member 33 to the mattress 31 used conventionally. Therefore, since it is not necessary to replace the existing mattress, it is convenient and economical, and is also easy to use.

  The upper sliding member 34 and the lower sliding member 35 are formed of a sheet-like material having lubricity. Therefore, when the mattress 31 is curved, the sliding members 34 and 35 slide smoothly with respect to the mattress 31, and this also occurs on the upper surface of the mattress 31 on the back surface of the user U when the back is raised. It is possible to prevent the compression force from acting.

The lubricity of the upper surface of the mattress 31 may be inferior to the lubricity of the upper and lower surfaces of the sliding members 34 and 35 depending on the type of fabric used. In such a case, the lower sliding member 35 of the sliding flame potatoes to the upper surface of the mattress 31, the upper sliding member 34 will be to slide smoothly relative to the lower sliding member 35.

  For this reason, even if a cloth having poor lubricity is used for the exterior of the mattress 31, the upper sliding member 34 reliably slides with respect to the lower sliding member 35, so that the upper surface of the mattress 31 is placed on the back surface of the user U. The applied compression force can be reliably reduced.

  The upper sliding member 34 and the lower sliding member 35 are formed in the same size as the mattress 31 in length and width. For this reason, the entire top surface of the mattress 31 has a uniform thickness without causing a step, so that the back surface of the user U who is lying on the top surface of the mattress 31 is not given an uncomfortable feeling.

  The slip prevention member 41 having one end connected to the tip of the upper slide member 34 is guided to the lower surface side of the mattress 31 at the other end, and the end is connected to the holding member 33. That is, the front end portions of the upper slide member 34 and the lower slide member 35 are held by the mattress 31 via the holding member 33 by the displacement preventing member 41.

  Therefore, when the upper sliding member 34 and the lower sliding member 35 slide in the direction of climbing up the upper surface of the mattress 31 when the back is raised, the tip end sides of the sliding members 34 and 35 are shifted in the width direction of the mattress 31. Be regulated.

  As a result, the sliding members 34 and 35 slide smoothly with respect to the upper surface of the mattress 31, so that the compressive force generated on the upper surface of the mattress 31 is reliably reduced on the back surface of the user U. be able to.

  At the time of raising the back, the upper sliding member 34 slides with respect to the lower sliding member 35, so that the upper sliding member 34 and the displacement preventing member 41 generate forces in directions indicated by arrows A and B in FIG.

  Therefore, the sliding of the upper sliding member 34 with respect to the lower sliding member 35 is promoted by the force indicated by the arrows A and B. As a result, since the upper sliding member 34 slides smoothly and reliably with respect to the lower sliding member 35, the user U's abdomen may not be easily compressed.

(Second Embodiment)
FIG. 7 shows a second embodiment of the present invention. In the first embodiment, the upper sliding member 34 and the lower sliding member 35 have been described by taking as an example a case in which a sheet-like material having lubricity is sewn into a sheet like a bed pad.

  In the second embodiment, the upper sliding member 34 and the lower sliding member 35 have a bag portion 45 sewed on a sheet-like material having lubricity, and the bag portion 45 is elastically provided inside. A core material 46 made of an elastic material such as a synthetic resin having a certain degree of bending hardness, that is, hardness that does not break when the mattress 31 is bent is accommodated.

  The bag portion 45 and the core member 46 may be integrated by means such as stitching or adhesion.

  In this way, when the one end portion side of the mattress 31 is raised and curved by the back floor portion 9 of the bed apparatus 1, and the upper and lower sliding members 34 and 35 are bent together with the mattress 31, these sliding members 34. , 35 are smoothly curved together with the mattress 31 without being bent due to the hardness of the core 46.

  Therefore, the lower sliding member 35 slides smoothly with respect to the mattress 31, and the upper sliding member 35 slides smoothly with respect to the lower sliding member 34. Therefore, when the mattress 31 is bent, the mattress 31 It is possible to effectively prevent the compressive force generated on the upper surface of the user from being transmitted to the rear surface of the user U.

In the second embodiment, the thickness of the core material 46 used for the lower sliding member 35 may be larger than the thickness of the core material 46 used for the upper sliding member 34.
By doing so, when the mattress 31 is curved, the compression force generated on the upper surface of the upper sliding member 34 that contacts the back surface of the user U can be reduced more than the compression force generated on the upper surface of the lower sliding member 35. Accordingly, the compressive force acting on the back surface of the user U can also be reduced.

  In the second embodiment, only the lower sliding member 35 may have a configuration in which the core member 46 is accommodated in the bag portion 45, and the upper sliding member 34 may have the configuration shown in the first embodiment.

(Third embodiment)
FIG. 8 shows a third embodiment of the present invention. In this embodiment, the sliding member has a three-layer structure. That is, the intermediate slip member 37 is provided between the upper slip member 34 and the lower slip member 35.

  By making the sliding members 34, 35, and 27 have a three-layer structure, when one end of the mattress 31 is bent upward, the compressive force generated on the upper surface of the mattress 31 is applied to the lower sliding member 35 and the intermediate sliding member 37. Since it is dispersed and hardly transmitted to the upper sliding member 34, it is possible to reliably reduce the compressive force applied to the back surface of the user U when raising the back as compared with the case of the two-layer structure.

  In addition, even if the slipperiness of the upper surface of the mattress 31 is low and the lower slide member 35 is not easily slid with respect to the upper surface of the mattress 31, the lower surface of the intermediate slide member 37 is reliably against the upper surface of the lower slide member 35. Thus, the lower surface of the upper sliding member 34 slides securely against the upper surface of the intermediate sliding member 37.

  Therefore, the relative sliding length of the upper sliding member 34 with respect to the upper surface of the mattress 31 can be sufficiently obtained. Therefore, the compressive force applied to the back surface of the user U when raising the back can be reliably reduced. .

(Fourth embodiment)
FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, only one sliding member 39 is provided on the upper surface of the mattress 31 by stitching the rear end side to the holding member 33 integrally.

  That is, the back-raised bedding 32 having the above-described structure has a sliding member 39 having a single-layer structure, and the sliding member 39 accommodates the core member 46 in the bag portion 45 as in the second embodiment shown in FIG. Configured.

  The sliding member 39 is thick. The bag portion 45 of the mattress 31 of the sliding member 39 has a rear end portion side of the bag portion 45 on both sides and three sides of the end portion corresponding to the other end portion side in the longitudinal direction. A fastener 48 that can be opened and closed is provided.

  According to such a configuration, by opening the fastener 48 of the bag portion 45, the core member 46 can be replaced with one having a different cushioning performance. For example, the core material 46 can be replaced with a foamed elastic material having a hardness according to the preference of the user U.

  In each of the above-described embodiments, the case where the one end portion side of the mattress is bent upward by the wake-up type bed apparatus has been described as an example.

  Alternatively, one end side of the mattress can be raised by curving one end in the longitudinal direction inside, as described in the “Background Art” section, without using a wake-up bed device. Even when a mattress having a structure with a built-in mechanism is used, the bedding for raising the back shown in each embodiment described above can be applied.

  DESCRIPTION OF SYMBOLS 1 ... Bed apparatus, 6 ... Floor board, 31 ... Mattress, 32 ... Bedding, 33 ... Holding member, 34 ... Upper sliding member, 35 ... Lower sliding member, 37 ... Intermediate slip member, 39 ... Sliding member, 41 ... Non-slip 45, a bag part, 46 ... core material.

Claims (2)

A bed apparatus having a headboard at one end in the longitudinal direction of the bed frame is provided with a floor plate body having a back floor portion that is driven up and down at one end in the longitudinal direction of the bed frame. by being driven in the upward direction, the bed plate structure the upper surface of the mattress, which is provided to face the lower surface of one longitudinal end portion of the upper body of the user to be supine on the upper surface of the mattress is located, upwardly A bedding for a mattress that is curved,
Of the upper surface and the pair of end surfaces, the upper surface and one end surface or one end surface is formed in a bag shape, and is detachably attached to the other end located on the opposite side of the back floor in the longitudinal direction of the mattress. A holding member to be
Has a distal end and a rear end, can and the rear end portion is mounted the holding member provided integrally on the lower surface and opposite top surface of the mattress of the holding member to the other end of the mattress If the upper surface of the mattress is covered and the back floor portion is driven in the rising direction to bend one end portion in the longitudinal direction of the mattress upward, it corresponds to one end portion in the longitudinal direction of the mattress. and the sliding member tip which slides in the bid up direction the end of the mattress while receiving a load of the user,
Longitudinal end portion one end of which is connected to the tip portion corresponding to the, while wearing the pre-Symbol holding member to the other end of the mattress, the one end positioned in the rear floor portion of the mattress of the sliding member a displacement preventing member which part is other longitudinal end bent on the lower surface side of the one end of the mattress is detachably connected to the lower surface of the holding member except,
Comprising
The sliding member includes a plurality of sliding members that are superposed on the upper surface of the mattress in the vertical direction along the thickness direction of the mattress, and the upper and lower surfaces of the sliding members that are in contact with each other are slidable. It is formed on the smooth surface,
One end of the slip prevention member is connected to the tip of the slide member located on the uppermost side among the plurality of the slide members that are superposed. The plurality of polymerized sliding members are each formed into a bag body made of a sheet-like material, and when one end of the mattress is bent upward by the back floor portion within the bag body. The mattress according to claim 1, wherein the mattress is formed of a core material having a hardness that is elastically curved together with the mattress.

Images