Bedding

Abstract

The present invention has been made to solve the problems of conventional bedding, and aims to provide a comfortable sleep for the sleeper and to improve the durability of the bedding. [Solution] The present invention comprises a mattress, a coverlet, and a covering sheet member placed between the coverlet and the mattress, the covering sheet member being made of a stretchable material and surrounding the entire mattress and the sleeper in the width direction when the sleeper is lying on the mattress, and being formed so as to shrink towards the sleeper lying on the mattress, and the coverlet is configured so that, in a plan view, the ends of the coverlet up to a predetermined length from the edges on the sleeper's head and toe sides in the longitudinal direction, and the ends up to a predetermined length from the edges on the right and left sides in the width direction, have a different stitch direction than the other parts.

Description

Technical Field

[0001] The present invention relates to bedding, and more particularly to a sheet-like mattress for a sleeper to lie on, a covering bedding for covering the sleeper lying on the mattress, and a covering sheet member provided between the covering bedding and the mattress.

Background Art

[0002] In daily life, a sleeper lies on a mattress such as a futon or a bed mattress, and covers himself / herself with a covering bedding such as a comforter, a blanket or a towel blanket to go to bed. When going to bed, the sleeper selects a covering bedding with an appropriate thickness, size, weight and material according to the season, the temperature and humidity in the bedroom, or the amount of clothing the sleeper is wearing.

[0003] During sleep, the sleeper turns over unconsciously several times. When turning over, the covering bedding on the sleeper may shift and fall from its original position. This shifting and falling of the covering bedding is a problem that occurs regardless of the type of bedding, and particularly frequently occurs when using a light and thin bedding (for example, a blanket, a towel blanket, etc.). When the covering bedding shifts and falls, a part of the body is exposed. Therefore, in a period with a low room temperature such as winter, the body will be exposed to cold air. As a result, the body temperature of the sleeper drops, waking up the sleeper and disturbing comfortable sleep.

[0004] On the other hand, when using a heavy and thick bedding (for example, a comforter, etc.) as the covering bedding, the occurrence of shifting and falling can be reduced compared to the case of using a light bedding. However, shifting and falling still occur due to the sleeper's turning over or kicking. In addition, because of its thickness, a thick bedding is difficult to curve along the line of the sleeper's body. As a result, a gap is generated between the covering bedding and the sleeper, allowing cold air to penetrate. When the body is exposed to cold air, the body temperature of the sleeper drops, waking up the sleeper and disturbing comfortable sleep.

[0005] Conventionally, in order to suppress the slipping and gap generation of the overlaid bedding, a configuration for fixing the overlaid bedding to the underlying bedding is known (see, for example, Patent Document 1). Specifically, this bedding fixes the periphery of the overlaid bedding to the periphery of the underlying bedding using a plurality of stretchable rubber strings. Thereby, even if the sleeper turns over, the overlaid bedding is prevented from moving from its fixed position. Further, since the overlaid bedding is brought into close contact with the sleeper by the restoring force of the plurality of rubber strings, no gap is formed between the overlaid bedding and the sleeper.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, in the bedding of Patent Document 1, in order to bring the entire plane of the overlaid bedding into close contact with the sleeper's body, a plurality of rubber strings having a relatively strong restoring force are used, and the overlaid bedding and the underlying bedding are pulled against each other with a relatively strong force at the installation positions of the rubber strings. For this reason, there has been a problem that a locally strong force acts on a part of the sleeper's body, and the sleeper feels a sense of compression in a part of the body and wakes up. Further, at the attachment portions (roots) of the rubber strings of the overlaid bedding and the underlying bedding, a locally strong tensile force acts on the rubber strings, so there is a risk of breakage or deterioration.

[0008] The present invention has been made to solve the above-described problems of the conventional bedding, and an object thereof is to provide a bedding that can provide a comfortable sleep for the sleeper and improve the durability of the bedding.

Means for Solving the Problems

[0009] In order to solve the above problems, the present invention includes a sheet-like futon for a sleeper to lie on, a comforter for covering the sleeper lying on this futon, and a covering sheet member provided between this comforter and the futon. The covering sheet member includes an upper sheet member having a rectangular shape and a lower sheet member having substantially the same shape and size as the upper sheet member. In a plan view, the upper sheet member and the lower sheet member are such that, among the peripheral edges of the upper sheet member and the lower sheet member, the edge on the head side of the sleeper is open, and the edges on the left side, the right side, and the toe side of the sleeper are closed. The upper sheet member and the lower sheet member of the covering sheet member are formed of a stretchable material, and in a state where the sleeper is lying on the futon, they surround the entire circumference of the futon and the sleeper in the width direction and are formed to shrink toward the sleeper lying on the futon. The comforter is configured such that, in a plan view, the ends from the head side and the toe side edges of the sleeper to a predetermined length in the longitudinal direction, and the ends from the right and left edges to a predetermined length in the width direction, have a knitting direction different from that of the other parts so as not to curl, and the ends of this comforter are provided over the entire circumference of the outer peripheral edge of the comforter in a plan view. Approximately 90 degrees configured differently, and the ends of this comforter are provided over the entire circumference of the outer peripheral edge of the comforter in a plan view.

[0010] In the present invention configured as described above, since the sleeper is surrounded by the covering sheet member, it is possible to prevent the sleeper's body from being touched by cold air. Also, since it is not configured to be pulled by a rubber string or the like as in the conventional case, the sleeper does not feel a sense of compression, and it is possible to prevent the comforter and the futon from being torn. Moreover, since the covering sheet member is formed of a stretchable material, the sleeper can easily enter the covering sheet member. Also, since the covering sheet member is formed to shrink toward the sleeper, it is possible to suppress the occurrence of a gap between the covering sheet member and the sleeper due to the covering sheet member closely adhering to the body. Furthermore, the comforter is configured such that, in a plan view, the ends from the head side and the toe side edges of the sleeper to a predetermined length in the longitudinal direction, and the ends from the right and left edges to a predetermined length in the width direction, have a knitting direction different from that of the other parts so as not to curl, Approximately 90 degreesThey are configured differently, and the end portion of the overlying bedding is provided over the entire circumference of the outer peripheral edge of the overlying bedding in plan view, so that the end portion of the overlying bedding can be prevented from being rolled up. Therefore, a comfortable sleep can be provided to the sleeper, and the durability of the bedding can be improved.

[0011] In the present invention, preferably, a frictional force reducing member for reducing the frictional force is further provided, and this frictional force reducing member is provided between the overlying bedding and the covering sheet member. In the present invention configured as described above, since the frictional force reducing member is provided between the overlying bedding and the covering sheet member, the frictional force generated between the overlying bedding and the covering sheet member can be suppressed. Thereby, it is possible to suppress the covering sheet member from moving during turning over and dragging the overlying bedding so that it slips off.

[0012] Further, in the present invention, preferably, a heat retaining sheet for maintaining the body temperature of the sleeper during sleep is further provided, and this heat retaining sheet is placed on the upper surface of the covering sheet member. In the present invention configured as described above, since the heat retaining sheet is close to the sleeper, the sleeper can sleep while being warmed.

[0013] In the present invention, preferably, a vertical wall extending in the vertical direction is further provided, and this vertical wall surrounds the entire circumference of the futon in plan view. In the present invention configured as described above, since the vertical wall is provided around the entire circumference of the futon, it is possible to suppress the overlying bedding from slipping off.

[0014] Further, in the present invention, preferably, the overlying bedding includes an additional sheet, and this additional sheet is detachably attached to the main body portion of the overlying bedding by a connecting means. In the present invention configured as described above, the size of the overlying bedding can be changed according to the preference of the sleeper.

[0015] In the present invention, preferably, a portion of a predetermined length from the edge on the head side of the sleeper in the longitudinal direction of the covering sheet member is formed of a cover, and this cover is detachably attached to the other portion. Also, in the present invention, preferably, the upper sheet member and the lower sheet member of the covering sheet member are detachably joined by a zipper. In the present invention, preferably, the covering sheet member includes a first covering sheet member, a second covering sheet member that covers the outer periphery of the first covering sheet member, and a third covering sheet member that covers the outer periphery of the second covering sheet member. The upper sheet member of the first covering sheet member is formed to have a longer length in the longitudinal direction than the second covering sheet member and the third covering sheet member on the head side of the sleeper.

Effect of the Invention

[0016] According to the bedding of the present invention, it aims to provide a comfortable sleep for the sleeper and improve the durability of the bedding.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0018] First, referring to FIGS. 1 and 2, a bedding according to an embodiment of the present invention will be described. The bedding 1 of the present embodiment is a futon set for a sleeper to lie down horizontally. The bedding 1 of the present embodiment includes a laid futon 10 directly placed on the floor or tatami in the bedroom, a comforter 20 to be covered so as to cover the sleeper from above, and a covering sheet member 30 disposed between the laid futon 10 and the comforter 20. The bedding 1 of the present embodiment is of a single (for one person) size, but is not limited thereto, and may be of a double (for two persons) or triple (for three persons) size or the like.

[0019] The laid futon 10 is, for example, a sheet-like futon which is a commercially available laid futon, and is a portion where the sleeper lies horizontally along the longitudinal direction. The laid futon 10 is, for example, rectangular (rectilinear), has a length in the longitudinal direction (vertical direction) of about 200 cm, a length in the width direction (horizontal direction) of about 100 cm, and a thickness (length in the height direction) of about 7 cm. The laid futon 10 is, for example, a lightweight type of futon with a total weight of about 5.5 kg so as to be easily carried when not in use. The laid futon 10 can suppress the reaction force from the floor from being directly transmitted to the sleeper by the elasticity of the laid futon, and can maintain the natural shape of the spine so that the sleeper can lie down in an ideal sleeping posture. The laid futon 10 preferably has a thickness of about 5 cm or more in order to maintain an ideal sleeping posture. Further, when a mattress for a bed is used as the laid futon 10, the thickness from the lower surface of the laid futon 10 to the upper surface of the comforter 20 is about 70 cm or more.

[0020] In addition, the material used for the futon 10 is preferably made of cotton that is easy to absorb sweat and has a good texture, but woolen fabrics, silk fabrics, and cotton fabrics of wool with rich natural heat retention properties of the fiber itself may also be used. Furthermore, in addition to natural fibers suitable for heat retention, fabrics of synthetic fibers and chemical fibers, such as fabrics of urethane, tetron, polyester, nylon, etc., can also be adopted as materials with good texture and excellent heat retention properties.

[0021] The futon 10 allows the sleeper to appropriately select an appropriate size, thickness, hardness, material, etc. according to the season, room temperature, humidity, age or gender of the sleeper, and a bedding suitable for the sleeper's preference is used. The futon 10 is not limited to a comforter, and instead of a comforter, a mattress for a bed, a thin quilt, a blanket, etc. can be used. Although the futon of the present embodiment is used without covering the futon with a sheet, the surface of the futon may be covered with a sheet to suppress dirt on the futon.

[0022] The top cover 20 is various types of quilts such as commercially available products and handmade products such as hand-knitted fabrics, and is a part that covers the entire body of the sleeper lying horizontally on the futon 10 from above to keep the body temperature of the sleeper during sleep. The top cover 20 is formed, for example, in a rectangle larger than the outer contour of the futon 10, with a length in the longitudinal direction of about 250 cm and a length in the width direction of about 180 - 200 cm. The top cover 20 is, for example, a lightweight type of quilt with a total weight of about 1.8 kg so that it is easy to carry when not in use. The top cover 20 is composed of a thickness and material that do not allow cold air to pass through, and is composed of a weight that does not give the sleeper a feeling of pressure.

[0023] The top cover 20 is a bedding available on the market. Two beddings with a length in the width direction of about 75 cm can be prepared, and these two top covers can be arranged side by side in the width direction and sewn together so that the length in the width direction becomes about 150 cm. Thereby, the material cost of the top cover can be reduced, and the seam can also be used as a mark when aligning the quilt with the comforter.

[0024] In addition, materials used for the overlaid bedding 20 may include knitted fabrics of yarn, woolen fabrics of wool, silk fabrics, and cotton fabrics. Furthermore, in addition to natural fibers and lyocell, synthetic fibers, woven fabrics of chemical fibers, feathers, etc. may also be used. The overlaid bedding 20 allows the sleeper to appropriately select an appropriate size, thickness, hardness, material, etc. according to the season, room temperature, humidity, age or gender of the sleeper, and a bedding suitable for the sleeper's preference is used. As the overlaid bedding 20, lightweight items such as blankets and towel quilts may be used.

[0025] Also, in plan view, the overlaid bedding 20 is knitted thicker at the end portions from the edge on the head side or the toe side in the longitudinal direction by about 10 cm compared to other regions. Similarly, in the width direction, the overlaid bedding 20 is knitted thicker at the end portions from the left and right edges by about 10 cm compared to other regions. As a result, the end portions of the overlaid bedding 20 hang vertically downward due to their own weight and come into contact with the floor surface (see Fig. 6). Since frictional resistance is generated at the contact surface when the end portion of the overlaid bedding 20 contacts the floor surface, it is possible to prevent the overlaid bedding 20 from slipping off. Also, since this frictional resistance increases as the thickness of the overlaid bedding 20 increases, it is possible to prevent the overlaid bedding 20 from slipping off. The end portions of the overlaid bedding 20 are preferably made of an inexpensive material because they come into contact with the floor surface. Note that the larger the surface area of the overlaid bedding 20, the more effectively it can be prevented from slipping off.

[0026] The overlaid bedding 20 is knitted partially thicker to meet the needs of the sleeper in order to increase the heat retention effect in part. For example, when the sleeper has cold hands and feet, the overlaid bedding 20 can be knitted thicker between the 30 cm position and the 50 cm position in the longitudinal direction with reference to the edge on the toe side in plan view, so as to intensively warm the toes of the sleeper.

[0027] When viewed in plan, the top cover bedding 20 is woven by a different weaving method at the end portions about 10 cm in the longitudinal direction from the edge ends on the head side and the toe side, and at the end portions about 10 cm in the width direction from the left and right edge ends, which are different from the other regions. Specifically, the direction of the stitches of each end portion and the portion of the other region is about 90 degrees different. Thereby, it is possible to suppress the end portions of the top cover bedding 20 from being rolled up.

[0028] The covering sheet member 30 is a portion that surrounds the entire circumference in the width direction of the futon 10 and the sleeper. The covering sheet member 30 is formed of a stretchable material, and the sleeper can move freely within the covering sheet member 30.

[0029] Referring to FIGS. 2 and 3, the covering sheet member 30 includes a first covering sheet member 32, a second covering sheet member 34 that covers the outer periphery of the first covering sheet member 32, and a third covering sheet member 36 that covers the outer periphery of the second covering sheet member 34, and is configured with a multi-stage laminated structure having three layers. The first covering sheet member 32, the second covering sheet member 34, and the third covering sheet member 36 are formed in a bag shape having the same shape and the same size, and are formed in a rectangle having a length in the longitudinal direction of about 250 cm and a length in the width direction of about 160 to 200 cm. The covering sheet member 30 is configured such that the first covering sheet member 32 is inserted into the second covering sheet member 34, and the first covering sheet member 32 and the second covering sheet member 34 are inserted into the third covering sheet member 36. That is, this multi-stage laminated structure is configured by sequentially inserting a covering sheet member of another bag body inside the covering sheet member of the bag body.

[0030] Each covering sheet member 32, 34, 36 is composed of an upper sheet member 32a, 34a, 36a which is a rectangular cloth, and a lower sheet member 32b, 34b, 36b which is a cloth having the same shape and the same size as the upper sheet member. Each covering sheet member is formed by sewing the upper sheet member 32a, 34a, 36a and the lower sheet member 32b, 34b, 36b together with a thread 37 in a state where they are overlapped. Note that each covering sheet member may be constituted by stitching together a plurality of small rectangular sheets. In this case, the material cost can be reduced by stitching using a relatively inexpensive commercially available cloth that is mass-produced. Also, the seam of the thread can be used as a mark when aligning the covering sheet member 30 and the bedding 10.

[0031] In a plan view, each covering sheet member 32, 34, 36 has the upper sheet member 32a, 34a, 36a and the lower sheet member 32b, 34b, 36b overlapped, and among the peripheral edges of the upper sheet member and the lower sheet member, the left edge ends 32c, 34c, 36c, the right edge ends 32d, 34d, 36d, and the toe side (bottom side) edge ends 32e, 34e, 36e are sewn together with a thread 37 (see FIG. 3). That is, each covering sheet member 32, 34, 36 is sewn in a U-shape with a thread 37 in a plan view, excluding the edge end on the head side of the sleeper. Each covering sheet member 32, 34, 36 has openings 32f, 34f, 36f formed by leaving the edge end on the head side of the sleeper in an open state (see FIG. 2).

[0032] The openings 32f, 34f, 36f of the respective covering sheet members 32, 34, 36 have an opening area large enough for the bedding 10 and the sleeper to pass through. Thereby, the bedding 10 is inserted through the opening 32f of the first covering sheet member 32, and the bedding 10 is accommodated inside the first covering sheet member 32. Further, the first covering sheet member 32 is configured such that the sleeper can enter through the opening 32f when the bedding 10 is stored inside the first covering sheet member 32. In addition, in the hot season of summer, a highly absorbent sheet such as a towel blanket may be laid on the lower sheet member 32b of the covering sheet member 32.

[0033] Each of the covering sheet members 32, 34, 36 is formed of a knitted fabric knitted in a knit stitch and is formed to be stretchable. Each of the covering sheet members 32, 34, 36 may be formed of, for example, a sheet-like knitted or woven fabric knitted with a stretchable linear material, or a sheet-like knitted or woven fabric provided with stretchability by rubber knitting a stretchable linear material or a non-stretchable linear material.

[0034] In the first covering sheet member 32, the portion in contact with the sleeper's neck, which is a portion of a predetermined length in the longitudinal direction from the head-side edge, may be configured with a detachable cover so that it can be replaced when dirt occurs. This cover is detachably attached to the first covering sheet member 32 by a zipper or the like. This cover has the same length in the width direction as the first covering sheet member 32 and is about 160 to 200 cm. Also, the cover has a length in the longitudinal direction that is half the length of the first covering sheet member 32 and is about 160 to 200 cm. Note that the cover may be configured to have a longer length in the longitudinal direction and be folded back at the head side to cover the upper bedding 20. Thereby, it is possible to suppress the displacement of the entire bedding and stabilize it.

[0035] The upper sheet member 32a of the first covering sheet member 32 may be configured to have a longer length in the longitudinal direction than the second covering sheet member 34 and the third covering sheet member 36, and to be folded back at the head side and cover the upper bedding 20. In this case, the upper sheet member 32a of the first covering sheet member 32 is formed with a length of about 125 cm or more in the longitudinal direction of the folded-back portion. Thereby, in order for the folded-back portion of the upper sheet member 32a of the first covering sheet member 32 to cover the end portions on the head side of the second covering sheet member 34, the third covering sheet member 36, and the upper bedding 20, it is possible to prevent the end portions of the second covering sheet member 34, the third covering sheet member 36, and the upper bedding 20 from getting dirty.

[0036] Since each of the covering sheet members 32, 34, 36 is made of a stretchable material, a restoring force that tries to return to the original shape is generated due to the material itself or the knitting method. The openings 32f, 34f, 36f of each covering sheet member are sized to allow a sleeper to pass through in a state where the futon 10 is housed within the first covering sheet member 32. Further, each of the covering sheet members 32, 34, 36 is configured to shrink toward the futon 10 and the sleeper and adhere to the sleeper's body when the sleeper lies on the futon 10. For this reason, even if the sleeper turns over during sleep, the covering sheet members 32, 34, 36 adhere to the sleeper's body following the change in the sleeper's posture.

[0037] Referring to FIG. 4, the first covering sheet member 32 is formed by a pom-pom knitting. A plurality of pom-poms 39, which are small spheres, are sewn to the lining of the upper sheet member 32a of the first covering sheet member 32. The pom-poms 39 are provided on the entire surface of the lining of the upper sheet member 32a. The plurality of pom-poms 39 form a plurality of small spaces between the pom-poms 39, and a heat insulation effect can be obtained. Thereby, the sleeper can sleep warmly.

[0038] Each of the covering sheet members 32, 34, and 36 may be formed by knitting, such as plain knitting, rubber knitting, loop knitting, or chain knitting, instead of bobbin knitting, as long as it is stretchable. Also, when each of the covering sheet members 32, 34, and 36 is made of yarn, the thicker the yarn, the better the adhesion to the sleeper during use and the heavier the weight, which will cause a sense of compression to the sleeper. However, the thinner the yarn, the lighter the weight, so it is possible to suppress giving a sense of compression to the sleeper. It is most preferable that each covering sheet member is formed of a cashmere material for a comfortable feeling.

[0039] In addition, since the first covering sheet member 32 directly touches the sleeper, it is preferable to adopt a material that is gentle on the skin, such as natural fibers such as cotton and hemp, Tencel (registered trademark), and lyocell. Natural fibers such as cotton and hemp are also superior in water absorption compared to other materials and can improve the comfort. Also, when using a sheet with a structure in which pure cotton and degreased cotton are laminated, the heat retention and water absorption can be improved.

[0040] Each of the covering sheet members 32, 34, and 36 can be constituted by a medical bandage-like sheet. In this case, the first covering sheet member 32 is formed so that its surface area is larger than that of the second covering sheet member 34 and the third covering sheet member 36 in a plan view. Thereby, it becomes easier for the sleeper to enter the covering sheet member, and it is also possible to suppress the covering sheet member from shifting with respect to the bedding.

[0041] Also, each of the covering sheet members 32, 34, and 36 can be constituted by an aluminized sheet or an aluminum fabric. Thereby, the durability of the covering sheet member can be improved. Since the aluminized sheet and the aluminum fabric are thin and easy to shift, it may be configured such that a cloth tape with a small width (for example, about 2 cm) can be attached to the edge portion to be fixed to other members. Each of the covering sheet members 32, 34, and 36 may be formed of an aluminized sheet for heat storage, with the inside being gold and the outside being silver.

[0042] The first covering sheet member 32 may be configured by sandwiching a sheet made of raw cotton or absorbent cotton with a cloth sheet from above and below. Thereby, heat retention, moisture dissipation, and absorbency can be improved. Note that the raw cotton and absorbent cotton sandwiched by the cloth sheet may be stacked to form a double structure.

[0043] In the present embodiment, the upper sheet members 32a, 34a, 36a and the lower sheet members 32b, 34b, 36b are joined with a thread, but instead of this thread, they may be joined by a detaching means such as a zipper, a button, a string, a hook-and-loop fastener, etc. Thereby, the convenience of taking in and out the heat retention sheets 40, 42, etc. described later can be improved. Also, in the present embodiment, the covering sheet member 30 has the head side of the sleeper in a fully open state, but instead, only a part thereof may be opened, or a fastener or the like may be provided so that the opening area of the opening 32f can be adjusted.

[0044] Further, both the upper sheet members 32a, 34a, 36a and the lower sheet members 32b, 34b, 36b of each covering sheet member 32, 34, 36 are formed of a stretchable material, but only the upper sheet members 32a, 34a, 36a may be configured of a stretchable material and the lower sheet members 32b, 34b, 36b may be configured not to stretch. The covering sheet member 30 is composed of three layers, i.e., the first covering sheet member 32, the second covering sheet member 34, and the third covering sheet member 36, but it may be composed of only one layer of the first covering sheet member 32, or a fourth and a fifth covering sheet member may be further added to form four or five layers.

[0045] Referring to FIG. 3, above the first covering sheet member 32 and the second covering sheet member 34, a first heat-insulating sheet 40 and a second heat-insulating sheet 42 for maintaining the body temperature of a sleeping person during sleep are respectively placed. Specifically, the first heat-insulating sheet 40 is disposed between the upper sheet member 32a of the first covering sheet member 32 and the upper sheet member 34a of the second covering sheet member 34. Also, the second heat-insulating sheet 42 is disposed between the upper sheet member 34a of the second covering sheet member 34 and the upper sheet member 36a of the third covering sheet member 36. Each heat-insulating sheet is appropriately selected and used according to the season, room temperature, and humidity. In the present embodiment, each heat-insulating sheet has the same shape and the same size as each of the covering sheet members 32, 34, 36 in plan view, and is formed, for example, with a length in the longitudinal direction of about 250 cm and a length in the width direction of about 160 to 200 cm.

[0046] The first heat-insulating sheet 40 is inserted into the second covering sheet member 34 and is fixed by strings at the four inner corners, the central portion in the longitudinal direction, and the central portion in the width direction of the second covering sheet member 34 in order to prevent displacement. Also, the second heat-insulating sheet 42 is inserted into the third covering sheet member 36 and is fixed by strings at the four inner corners, the central portion in the longitudinal direction, and the central portion in the width direction of the third covering sheet member 36 in order to prevent displacement.

[0047] Each heat-insulating sheet is formed in a stretchable manner by a knitted fabric knitted in a rib stitch. Also, each heat-insulating sheet may be formed of a material with excellent heat-insulating properties such as a knitted fabric of natural fibers such as cashmere, angora, yak, camel, and wool. In particular, when cashmere is used for each heat-insulating sheet, the material is light and it is preferably comfortable to sleep on. Also, acrylic, nylon, polyurethane, etc., which are chemical fibers, may be used for each heat-insulating sheet, and the heat-insulating property may be enhanced by blending these materials with natural fibers for use. Also, each heat-insulating sheet may be configured in a pompom stitch, similar to the covering sheet member, and pompons may be provided on the lining of the heat-insulating sheet.

[0048] Referring to FIG. 2, a friction reduction member 50 is placed on the upper surface of the upper sheet member 36a of the third covering sheet member 36. Specifically, the friction reduction member 50 is disposed between the top bedding 20 and the third covering sheet member 36. In plan view, the friction reduction member 50 has, for example, the same shape and the same size as each of the covering sheet members 32, 34, 36 and each heat insulation sheet, and is formed to have a length of about 250 cm in the longitudinal direction and a length of about 160 to 200 cm in the width direction. In plan view, the friction reduction member 50 is arranged so that its center coincides with that of each of the covering sheet members 32, 34, 36 and each heat insulation sheet.

[0049] The friction reduction member 50 is formed of a material having a relatively small frictional resistance so as to suppress the generation of frictional force at the contact surface between the top bedding 20 and the third covering sheet member 36. For example, the friction reduction member 50 is formed of a material having a small coefficient of friction such as nylon, fluororesin, silk, Tencel (registered trademark). In the present embodiment, an example in which a rectangular sheet is used as the friction reduction member is shown, but instead of this rectangular sheet, a mesh-shaped sheet may be used, or a plurality of sheets may be separated and attached to the surface of the third covering sheet member 36.

[0050] Next, referring to FIGS. 5 and 6, a usage mode of the bedding according to an embodiment of the present invention will be described. With the futon 10 inserted into the first covering sheet member 32, the sleeper enters the covering sheet member 30 through the opening 32f of the first covering sheet member 32 and lies down along the longitudinal direction of the futon 10. Since each of the covering sheet members 32, 34, 36 is formed of a stretchable material so as to shrink toward the sleeper, each of the covering sheet members 32, 34, 36 adheres to the body of the sleeper along the body of the sleeper in the lying state (see FIG. 5). As a result, almost no gap is generated between the sleeper and the first covering sheet member 32.

[0051] When the sleeper turns over from the supine position (Fig. 6(a)) to the lateral position (Fig. 6(b)), the covering sheet member 30 is adapted to closely adhere to the sleeper's body following the change in the sleeper's posture. When the sleeper turns over, normally a large gap S1 is formed between the overlying bedding 20 and the sleeper. However, since the covering sheet member adheres to and follows the sleeper's body, only a slight gap S2 is formed between the sleeper and the first covering sheet member 32. Thus, no matter what posture the sleeper assumes, only a slight gap is formed, so that it is possible to prevent cold air from directly touching the body when the sleeper turns over.

[0052] Also, when the sleeper turns over from the supine position to the lateral position, since the friction force reducing member 50 is formed of a material having a relatively small frictional resistance, it is possible to prevent the friction force reducing member 50 from being dragged by the third covering sheet member 36 and slipping off, and it is also possible to prevent the overlying bedding 20 from being dragged by the friction force reducing member 50 and slipping off. When the third covering sheet member 36 is formed of a material prone to generating wrinkles on the surface, the contact area between the third covering sheet member 36 and the friction force reducing member 50 can be reduced by a plurality of wrinkles, and it is possible to further prevent the friction force reducing member 50 from being dragged by the third covering sheet member 36 and slipping off.

[0053] As shown in Fig. 6, the left and right edges in the width direction of the overlying bedding 20 are in contact with the floor surface. Even when the sleeper turns over from the supine position to the lateral position, the edge of the end portion of the overlying bedding 20 is in contact with the floor surface. Therefore, it is possible to prevent cold air from entering the overlying bedding 20, and the sleeper can sleep warmly.

[0054] Next, referring to Fig. 7, other embodiments of the present invention will be described. FIG. 7 shows that in plan view, a vertical wall 60 is provided along the outer contour of the bedding 1 so as to surround the entire periphery of the bedding 1. The vertical wall 60 is composed of a left vertical wall 60a arranged in the longitudinal direction, a right vertical wall 60b, a toe-side vertical wall 60c arranged in the width direction, and a head-side vertical wall 60d. The left vertical wall 60a and the right vertical wall 60b are formed, for example, with a length of 200 to 260 cm in the longitudinal direction, and the toe-side vertical wall 60c and the head-side vertical wall 60d are formed, for example, with a length of 150 to 210 cm in the width direction. The height of each vertical wall is formed, for example, with a height of 40 to 70 cm, and is set to be equal to or greater than the height of the body of the sleeper lying on the bedding 1. Thereby, even if the sleeper turns over, the movement of the top cover 20 is restricted by the vertical wall 60 so that it does not slip off from the upper surface of the sleeper.

[0055] The vertical wall 60 is formed, for example, of an L-shaped plate frame arranged along the laid bedding 10, a cloth frame or a net frame including columns arranged at least at the four corners of the bedding 1 and a strip-shaped cloth or net stretched between these columns, a rectangular box-shaped wooden frame arranged to surround the periphery of the bedding 1, a tube frame, a sponge frame, a block made of styrofoam, etc. Also, as the vertical wall 60, using a beautiful fabric, a plate with a mural painted on it, etc. allows the sleeper to sleep more comfortably.

[0056] The L-shaped plate frame is composed of a vertical plate extending in the vertical direction and a horizontal plate extending in the horizontal direction from the lower end of this vertical plate. The L-shaped plate frame is fixed by the weight of the bedding 1 when the horizontal plate is arranged under the laid bedding 10. The vertical plate of the bedding 1 stands vertically in the fixed state for the L-shaped plate frame. In plan view, the L-shaped plate frames are provided in two each on the left and right sides, adjacent to at least the left and right edge ends of the laid bedding 10. The L-shaped plate frame is composed of an iron plate, a pipe, wood, a log, etc. Also, the L-shaped plate frame is preferably covered with a cushioning material such as rubber in consideration of safety. Furthermore, when a cloth is stretched between a plurality of L-shaped plate frames, it is possible to surely prevent the top cover 20 from falling from the upper surface of the sleeper.

[0057] The belt-shaped cloth frame is configured by stretching a cloth between a plurality of columns erected around the bedding 1 in a plan view. For example, in a plan view, two columns are installed at equal intervals in the longitudinal direction on the left or right side of the bedding 1, and two columns are installed at equal intervals in the width direction on the head side and the toe side. The belt-shaped cloth frame is fixed to the columns by rubber, strings, etc. The belt-shaped cloth frame is more economical than the L-shaped plate frame and can suppress material costs. Also, it is preferable to cover the columns with a cushioning material such as rubber or cloth in consideration of safety.

[0058] The net frame is configured by stretching a net between a plurality of columns erected around the bedding 1 in a plan view. For example, four columns are installed at the four corners of the bedding 1 in a plan view. Hooks are attached to the columns, and the net frame is stretched by hanging the net on the hooks of each column. Compared with the L-shaped plate frame and the belt-shaped cloth frame, it can suppress material costs, does not give a sense of pressure to the sleeper, and does not get in the way when getting in and out of bed. To prevent the net from sagging, both ends of the net are pulled by rubber strings, etc.

[0059] Instead of the method of fixing the net to the columns, the net frame may be erected vertically like a hammock by using a rectangular net surrounding the bedding 1 in a plan view and pulling the four corners of this net with four ropes fixed to the ceiling. The net frame is formed, for example, with a length of 220 cm in the longitudinal direction, a width of 150 cm, and a height of 40 cm in a plan view. The net is formed of materials such as natural fibers and chemical fibers. If a rubber string is attached to the tip of the net, the net will never sag.

[0060] The rectangular box-shaped wooden frame includes two plates on the right and left sides and two plates on the head side and the toe side so as to surround the bedding 1 in plan view, and they are respectively connected by nails, bolts or nuts, etc. The box-shaped wooden frame is stronger and more durable than an L-shaped plate frame, etc., so it can prevent thick and heavy overlaid bedding from slipping off from above the sleeper. The box-shaped wooden frame is formed, for example, with a length of 220 cm in the longitudinal direction, a length of 150 cm in the width direction, and a height of 40 cm. The box-shaped wooden frame is not limited to a rectangular shape and may be formed in a polygonal or circular shape.

[0061] The tube frame is composed of a vinyl or rubber tube so as to surround the bedding 1 in plan view. The tube is composed of a plurality of small sealed spaces, i.e., air layers, stacked in the vertical direction. Since the tube is used in a state where air is injected and inflated, due to the heat insulation effect of the air layer, the sleeper can sleep warmly. The tube frame is formed, for example, with a length of 260 cm in the longitudinal direction, a length of 170 cm in the width direction (300 cm in the case of a double size), and a height of 45 cm. The width of the tube frame is set to 50 cm or less so that the sleeper can easily straddle it.

[0062] The sponge-made frame and the expanded polystyrene block are configured to stand so as to surround the bedding 1 in plan view. Commercially available sponges and expanded polystyrene blocks can be used. The sponge-made frame and the expanded polystyrene block are lightweight and can improve workability. Also, since sponges and expanded polystyrene have high heat insulation performance, the sleeper can sleep warmer. The sponge-made frame and the expanded polystyrene block are formed, for example, with a length of 250 cm in the longitudinal direction, a length of 150 cm in the width direction, and a height of 50 cm. The width of the sponge-made frame and the expanded polystyrene block is set to 10 cm to 50 cm so that the sleeper can easily straddle it.

[0063] Above the vertical wall 60, in plan view, it is covered by a rectangular upper sheet 70 that is larger than the outline of the vertical wall 60 (see Fig. 7). The upper sheet 70 is composed of, for example, a woolen fabric, a plain woven cloth, a heat insulating sheet, a vinyl-based sheet, etc. The upper sheet 70 is placed on the upper end of the vertical wall 60 and is configured to cover the upper opening surrounded by the vertical wall 60 and the wall surface of the vertical wall 60. As a result, the upper opening can be made smaller, so that the sleeper can sleep warmer. The material of the upper sheet 70 is selected according to the season. When using a woolen fabric in cold seasons, it can give a warm impression in terms of appearance. Also, when using a heavy material for the upper sheet 70, since the upper sheet 70 is pulled downward by its own weight, it is possible to suppress the occurrence of wrinkles.

[0064] Next, referring to Fig. 8, other embodiments of the present invention will be described. As described above, the overblanket 20 is formed, for example, in a rectangle larger than the outline of the futon 10, with a length in the longitudinal direction of about 250 cm and a length in the width direction of about 180 - 200 cm. However, when used by a person with a large body, a tall person, or a person with a bad sleeping position, there is a possibility that a part of the body may be exposed. On the other hand, if the overblanket is designed to be large enough not to be exposed, it is a size larger than necessary for a small person or a person with a good sleeping position, which is not economically preferable. In this embodiment, the overblanket 20 is composed of a main body sheet 20a and an additional sheet 20b, and the additional sheet 20b is detachably connected to the main body sheet 20a.

[0065] The additional sheet 20b is detachably connected to the left edge of the main body sheet 20a of the overblanket by a fastener 22 (connecting means). When the main body sheet 20a and the additional sheet 20b are connected, the overall size is about 250 cm in length in the longitudinal direction and 200 - 240 cm in length in the width direction. Thus, without newly purchasing a large-sized overblanket, the additional sheet can be extended according to the needs of the sleeper.

[0066] In this embodiment, the fastener 22 is used as the connecting means. However, instead of the fastener 22, it may be sewn with a thread, or the upper bedding 20 and the additional sheet 20b may be connected by buttons, hook-and-loop fasteners, or the like.

[0067] The bedding 1 of this embodiment can be used not only in winter but also in summer. The covering sheet member used in summer is joined in the longitudinal direction at the left and right edge portions of the upper and lower sheet members from the edge on the toe side to a position about 30 cm, and is open from that position to the edge on the head side. For the joining of the upper and lower sheet members, connectors such as zippers, strings, and buttons are used, and the lengths of the joined portion and the open portion are configured to be variable. Thereby, when it is hot in summer, the longitudinal length of the open portion can be increased by the connector, and when it is cool, the longitudinal length of the joined portion can be increased, thus providing a comfortable sleep. Also, a highly absorbent towel blanket is inserted into the covering sheet member, and both ends and the central portion in the width direction of the towel blanket are fixed inside the covering sheet member by strings or the like. Thereby, the towel blanket does not shift in the covering sheet member and does not move away from the body of the sleeper.

[0068] Next, the operation and effect of this embodiment will be described. The bedding 1 of this embodiment includes a sheet-like futon 10 for a sleeper to lie on, an upper bedding 20 that covers the sleeper lying on the futon 10, and a covering sheet member 30 (each covering sheet member 32, 34, 36) provided between the upper bedding 20 and the futon 10. This covering sheet member 30 surrounds the entire circumference of the futon 10 and the sleeper in the width direction when the sleeper is lying on the futon 10. Also, the covering sheet member 30 is closed on the toe side in the longitudinal direction and open on the head side.

[0069] In the bedding 1 of this embodiment configured as described above, since the covering sheet member 30 surrounds the entire circumference of the futon 10 and the sleeper in the width direction, local tensile forces do not occur as in the prior art, and the sleeper does not feel a sense of compression, and the top sheet 20 and the futon 10 are not torn or deteriorated. In addition, the covering sheet member 30 can suppress the contact of the sleeper's body with cold air. Therefore, it is possible to provide a comfortable sleep for the sleeper and improve the durability of the bedding.

[0070] Further, unlike a sleeping bag as an outdoor item, the bedding 1 of this embodiment is configured to be large enough for a sleeper to lie down comfortably. A sleeping bag for outdoor use is designed to be compact on the premise of being carried outdoors and is too small to turn over, but the bedding 1 of this embodiment allows the sleeper to turn over freely.

[0071] Unlike the historical bedding consisting of a conventional comforter and mattress, the bedding 1 of this embodiment can increase the options for top sheets by using a covering sheet member and can meet the needs of the sleeper.

[0072] In the bedding 1 of this embodiment, the covering sheet member 30 (each covering sheet member 32, 34, 36) is formed of a stretchable material and is formed to shrink toward the sleeper lying on the futon 10. As a result, since the covering sheet member 30 is formed of a stretchable material, the sleeper can easily enter the first covering sheet member 32. In addition, since each of the covering sheet members 32, 34, 36 is formed to shrink toward the sleeper, the first covering sheet member 32 adheres closely following the change in the sleeper's posture caused by turning over, and the generation of a gap between the first covering sheet member 32 and the sleeper can be suppressed.

[0073] In addition, the bedding 1 of the present embodiment further includes a frictional force reducing member 50 for reducing the frictional force. Since this frictional force reducing member 50 is provided between the overlying bedding 20 and the third covering sheet member 36, the frictional force generated between the overlying bedding 20 and the third covering sheet member 36 can be suppressed. As a result, it is possible to prevent the third covering sheet member 36 from moving during turning over and dragging the overlying bedding 20 to shift and fall off.

[0074] The bedding 1 of the present embodiment further includes heat retaining sheets 40 and 42 for maintaining the body temperature of the sleeper during sleep. The heat retaining sheet 40 is disposed between the first covering sheet member 32 and the second covering sheet member 34, and the heat retaining sheet 42 is placed between the second covering sheet member 34 and the third covering sheet member 36 so as to be close to the sleeper. Therefore, the sleeper can sleep warmly.

[0075] The bedding 1 of the present embodiment further includes a vertical wall 60 extending in the vertical direction. Since this vertical wall 60 surrounds the entire circumference of the futon 10 in plan view, it is possible to prevent the overlying bedding 20 from shifting and falling off.

[0076] In addition, in the bedding 1 of the present embodiment, the overlying bedding 20 includes an additional sheet 20b. Since this additional sheet 20b is detachably attached to the left edge of the main body sheet 20a of the overlying bedding by a connecting means such as a fastener 22, the size of the overlying bedding 20 can be changed according to the preference of the sleeper.

[0077] The present invention is not limited to the above-described embodiments, and various changes and modifications are possible within the scope of the technical idea described in the claims.

Explanation of Reference Numerals

[0078] 1: Bedding 10: Futon 20: Overlying bedding 22: Fastener 30: Covering sheet member 32: First covering sheet member 34: Second covering sheet member 36: Third covering sheet member 40: First heat insulation sheet 42: Second heat insulation sheet 50: Friction reduction member 60: Vertical wall 70: Upper surface sheet S1, S2: Clearance

Claims

1. A sheet-like mattress for a sleeper to lie on, A top sheet for covering the sleeper lying on this mattress, A covering sheet member provided between this top sheet and the said mattress, comprising, The said covering sheet member comprises an upper sheet member that is rectangular, and a lower sheet member having substantially the same shape and size as this upper sheet member. In plan view, among the peripheral edges of the said upper sheet member and lower sheet member, the edge portion on the head side of the sleeper is open, and the edge portions on the left side, right side, and the toe side of the sleeper are closed. The upper sheet member and lower sheet member of the said covering sheet member are formed of a stretchable material, and in a state where the sleeper is lying on the said mattress, they surround the entire circumference of the said mattress and the sleeper in the width direction, and are formed to shrink toward the sleeper lying on the said mattress. In plan view, the said top sheet is configured such that the end portions from the edge ends on the head side and toe side of the sleeper to a predetermined length in the longitudinal direction, and the end portions from the right and left edge ends to a predetermined length in the width direction, are formed so that the knitting direction is about 90 degrees different from that of the other portions so as not to be rolled up. The end portions of this top sheet are provided over the entire circumference of the outer peripheral edge of the said top sheet in plan view. A bedding characterized by the above.

2. Further comprising a frictional force reducing member for reducing frictional force, This frictional force reducing member is provided between the said top sheet and the said covering sheet member. The bedding according to Claim 1.

3. Further comprising a heat retaining sheet for maintaining the body temperature of the sleeper during sleep, This heat retaining sheet is placed on the upper surface of the said covering sheet member. The bedding according to Claim 1 or 2.

4. Further comprising a vertical wall extending in the vertical direction, The vertical wall surrounds the entire circumference of the laid bedding in plan view, and the bedding according to any one of claims 1 to 3.

5. The overlying bedding includes an additional sheet, and this additional sheet is detachably attached to the main body of the overlying bedding by connecting means, and the bedding according to any one of claims 1 to 4.

6. A part of the covering sheet member having a predetermined length from the edge on the head side of the sleeper in the longitudinal direction is formed of a cover, and this cover is detachably attached to the other part, and the bedding according to any one of claims 1 to 5.

7. The upper sheet member and the lower sheet member of the covering sheet member are detachably joined by a zipper, and the bedding according to any one of claims 1 to 6.

8. The covering sheet member includes a first covering sheet member, a second covering sheet member that covers the outer periphery of the first covering sheet member, and a third covering sheet member that covers the outer periphery of the second covering sheet member. The upper sheet member of the first covering sheet member is formed to have a longer length in the longitudinal direction than the second covering sheet member and the third covering sheet member on the head side of the sleeper, and the bedding according to any one of claims 1 to 7.

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