Mattress sheet

Abstract

To provide a mattress sheet capable of reducing difference in a time spent for folding the sheet to a mattress rear surface side and stretching it and in finish beauty even when staff members vary in skillfulness.SOLUTION: A mattress sheet 20 includes a sheet body 21 formed into an almost rectangular shape having two pairs of opposite sides; and a plurality of hook parts 22, 22,... for pulling respective sides 21a, 21b of the sheet body 21 in the direction nearly orthogonal to the sides. The plurality of hook parts 22, 22,... are formed by generating a sewing part 23t sewn in the direction orthogonal to an end edge with prescribed intervals T1, T2 relative to a string member 23 having a prescribed width disposed along side edges of the respective sides 21a, 21b.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sheet for a mattress, and more particularly to a technique for easily changing the sheet when making the bed. [Background technology]

[0002] For example, in hotels and nursing homes, there are many beds for users to sleep in, and sheets are placed on the beds to cover the mattresses. Every time the bed is used, the sheets are removed and new, clean sheets are placed.

[0003] A typical sheet is made of a piece of cloth material in a substantially rectangular shape that is larger than the mattress. In order to stretch the sheet so as to wrap around a mattress in a substantially rectangular shape, the sheet is first placed on the mattress in an unfolded state so that the center of the sheet is aligned with the center of the mattress, and then the mattress is partially lifted and the end of the sheet is folded onto the back side of the lifted mattress. The operation of folding the end of the sheet onto the back side of the mattress requires inserting a hand under the mattress and reaching toward the center of the mattress to pull the end of the sheet. Then, the folded sheet is pulled evenly toward the center under the mattress to stretch it out so that no wrinkles are generated. In order to install a single sheet, such an operation must be performed on all four sides of the mattress, and it takes a lot of effort to install the sheet neatly without wrinkles. Moreover, the number of beds installed in hotels and nursing homes is enormous, and it is a heavy burden to change the sheets of all the beds with limited manpower.

[0004] Therefore, technologies have been proposed to reduce the labor involved in changing sheets.For example, the technology described in Patent Document 1 relates to a tensioning device that hooks for tensioning sheets onto multiple loops provided along the edge of a sheet, and then moves the hooks downward by turning a handle for driving the hooks, thereby setting the sheet (Patent Document 1).

[0005] In addition, the technology described in Patent Document 2 involves hooking belt fasteners at both ends of a belt with length adjustment function onto sheet fasteners provided on multiple edges of opposing sides of the sheet, and shortening the length of the belt while wrapping the belt around the bottom of the mattress, thereby pulling the opposing sheet fasteners against each other and applying the sheet without wrinkles (Patent Document 2).

[0006] The technologies disclosed in Patent Documents 1 and 2 allow sheets to be set up relatively without much effort, but they require the sheets themselves to be provided with hooks for hanging them, and the number of hooks required as well as their locations and spacing vary depending on the device used to tension the sheets.

[0007] In other words, in order to stretch a sheet in an attractive manner using different devices, a sheet with a hook part that is suitable for that device is required, and the sheet needs to be improved depending on each device, which makes it lacking in versatility.

[0008] Furthermore, when sheets have multiple hooks, it can be difficult to determine which hook or fastener to attach to, and ultimately the sheet needs to be set so that its center is aligned with the center of the mattress. This center alignment takes time, so the time it takes to change sheets and the quality of the finished product can vary depending on the level of training of the staff. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 2922464 [Patent Document 2] JP 2001-292882 A Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been made in consideration of such problems, and aims to provide a sheet for a mattress that can reduce the difference in the time required to fold and stretch the sheet on the back side of the mattress and the difference in the aesthetic quality of the finished product, even if there is a difference in the level of training of personnel. [Means for solving the problem]

[0011] The inventors of the present invention discovered that by sewing string-like members of a predetermined width evenly at predetermined intervals along the edges near the ends of all four sides of the back surface of a mattress sheet, it is possible to hook the hooking members evenly to the sheet regardless of the level of skill, and thus arrived at the present invention.

[0012] The present invention provides the following solutions.

[0013] The mattress sheet according to the first feature is a mattress sheet including a sheet body formed in a substantially rectangular shape having two pairs of opposing sides, and a plurality of hooks for pulling each side of the sheet body in a direction substantially perpendicular to the side. The plurality of hooks are formed by creating sewn parts at predetermined intervals along the edge, which are sewn to a string-like member having a predetermined width arranged along the edge of each side in a direction perpendicular to the edge.

[0014] According to the first aspect of the invention, a string-like member having a predetermined width is arranged along the edge of each side, and a sewn portion is sewn in a direction perpendicular to the edge at a predetermined interval along the edge, so that a plurality of hook portions can be arranged in parallel at equal intervals along the edge. Therefore, as long as one remembers which position of the hook portions arranged in parallel at equal intervals to hook the hook members such as hooks, there is no need to align the center of the sheet, and even a less skilled person can neatly stretch the sheet without spending a lot of time.

[0015] The second feature of the invention is the first feature of the invention, in which the string-like members are arranged at predetermined intervals from the end in the extension direction of each side in a direction along the peripheral edge.

[0016] According to the second feature of the invention, the string-like members are arranged at a predetermined interval from the end of each side in the direction along the edge, so that when sewing each string-like member, it is possible to prevent interference between the string-like members arranged along the short side of the sheet and the string-like members arranged along the long side of the sheet. This makes it possible to prevent the sheet from becoming excessively thick. In addition, since the size of a sheet is generally formed to be sufficiently larger than the size of a mattress, it is not necessary to form hooks on all of the edges, and by arranging the string-like members at a predetermined interval from the end, it is possible to reduce the cost and labor required to form the hooks.

[0017] The third feature of the invention is the first feature of the invention, in which the string-like members are made of the same material as the material that forms the sheet body.

[0018] According to the third feature of the invention, the string-like members are formed from the same material as the sheet body. Therefore, even after repeated washing, drying, ironing, etc., the degree of elasticity of the sheet body and the degree of elasticity of the string-like members can be adjusted to match, allowing the sheet to be used continuously for a long period of time.

[0019] A fourth feature of the invention is the first feature of the invention, in which the string-like member has a thickness of 1.5 mm or less.

[0020] According to the fourth feature of the invention, the thickness of the string-like member is set to 1.5 mm or less, so even if the string-like member is sewn to the sheet body, the overall thickness can be prevented from becoming excessively thick, and the load on the drum when pressing with the drum can be reduced.

[0021] The invention relating to the fifth feature is an invention relating to any one of the first to fourth features, which is tensioned using a hanging member that moves in a direction approximately perpendicular to each side, and which is composed of a plate portion that is approximately rectangular in a plan view and a plurality of hanging portions that are provided at predetermined intervals on the long side of the plate portion and can be hung and detached from the hook portions, and the intervals at which the sewn portions are formed are set narrower than the intervals at which the hanging portions are provided.

[0022] According to the invention relating to the fifth feature, the sewn portions are formed approximately evenly at intervals narrower than the intervals at which the hanging portions are provided in the hanging member. Therefore, as long as the user does not make a mistake in which hook portion from the end to which the endmost hanging portion is hooked, then it is possible to tension the sheet neatly without time wasting by simply pulling each hanging member in a direction perpendicular to each edge, without having to align the center of the sheet. Effect of the Invention

[0023] According to the present invention, a mattress sheet can be provided that can reduce differences in the time required to fold and stretch the sheet on the back side of the mattress and in the aesthetic quality of the finished product, even if there are differences in the level of training of personnel. [Brief description of the drawings]

[0024] [Figure 1] Fig. 1 is a schematic diagram showing the overall configuration of a mattress sheet 20 according to this embodiment. Fig. 1(a) is a plan view of the entire mattress sheet 20, and Fig. 1(b) is a partially enlarged view. [Diagram 2] FIG. 2 is a schematic diagram showing details of a hanging member 10 constituting the tensioning unit 1, with FIG. 2(a) showing a perspective view and FIG. 2(b) showing a plan view. [Diagram 3] FIG. 3 is a schematic diagram showing a state in which the hanging member 10 is hung on a mattress sheet 20 according to this embodiment. [Figure 4] FIG. 4 is a schematic diagram showing in a simplified manner the overall configuration of the sheet-stretching device 1 according to this embodiment, where FIG. 4(a) is a perspective view and FIG. 4(b) is a plan view. [Diagram 5]FIG. 5 is an exploded perspective view of the sheet-stretching device 1 according to this embodiment. [Figure 6] FIG. 6 is a schematic diagram for explaining the extension unit 100 that can reciprocate in a direction perpendicular to the sides of the bed frame 30, FIG. 6(a) is a perspective view, and FIG. 6(b) is a plan view. [Figure 7] FIG. 7 is a schematic diagram showing a tensioning unit 100 of a fixed structure that does not reciprocate, among the tensioning units 100 according to this embodiment. [Figure 8] FIG. 8 is a schematic diagram showing the procedure for spreading the mattress sheet 20, which is the target to be stretched by the sheet stretching device 1 according to this embodiment, over the mattress 40. [Figure 9] FIG. 9 is a schematic diagram showing the procedure for hanging the hanging member 10 on the mattress sheet 20. As shown in FIG. [Figure 10] FIG. 10 is a schematic diagram showing a mattress sheet 20 stretched using the sheet-stretching device 1. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that this is merely an example, and the technical scope of the present invention is not limited to this example.

[0026] [Overall composition of mattress sheet 20] The overall configuration of a mattress sheet 20 according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a plan view showing the configuration of a mattress sheet 20 according to this embodiment. Fig. 1(a) is a plan view of the entire mattress sheet 20, and Fig. 1(b) is a partially enlarged view.

[0027] As shown in FIG. 1(a), the mattress sheet 20 according to this embodiment includes a sheet body 21 formed in a substantially rectangular shape having opposing short sides 21a and long sides 21b, and a plurality of hooking parts 22 are formed for pulling the sides 21a and 21b of the sheet body 21 in a direction substantially perpendicular to the sides 21a and 21b. As shown in FIG. 1(b), the hooking parts 22 on the short side 21a of the sheet body 21 are formed by forming sewn parts 23t sewn in a direction perpendicular to the edge of a string-like member 23 having a predetermined width arranged along the edge of the short side 21a at a first predetermined interval T1 to generate a plurality of loop-shaped parts. Similarly, the hooking parts 22 on the long side 21b are formed by forming sewn parts 23t sewn in a direction perpendicular to the edge of a string-like member 23 having a predetermined width arranged along the edge of the long side 21b at a second predetermined interval T2 to generate a plurality of loop-shaped parts.

[0028] That is, the string-like member 23 constituting the mattress sheet 20 according to this embodiment is a cotton member having a substantially rectangular shape in plan view with a predetermined width, a predetermined thickness, and a predetermined length, and is not connected to the sheet body 21 as it is. In this embodiment, as shown in FIG. 1(b), the string-like member 23 is placed on the sheet body 21, and the sewn parts 23t perpendicular to the direction in which the string-like member 23 extends are formed at predetermined intervals evenly along the extension direction of the string-like member 23, so that a loop-like part that can communicate only in the direction perpendicular to the extension direction of the string-like member 23 is formed between the two sewn parts 23t, 23t. The loop-like part formed between the two sewn parts 23t, 23t functions as a hook part 22 that can hook a hook-and-release part such as a hook. In this embodiment, the intervals T1 and T2 for forming the sewn parts 23t are both 70 mm, but are not limited to this.

[0029] Also, each string-like member 23 is arranged at a predetermined interval from the end of the extension direction of each side 21a, 21b in the direction along the edge. That is, as shown in FIG. 1(b), both ends of the string-like member 23 arranged along the edge of the short side 21a are arranged at a predetermined interval T3 from the end of the extension direction of the short side 21a, i.e., the long side 21b in the direction along the edge of the short side 21a. Similarly, both ends of the string-like member 23 arranged along the edge of the long side 21b are arranged at a predetermined interval T4 from the end of the extension direction of the long side 21b, i.e., the short side 21a in the direction along the edge of the long side 21b. In this embodiment, both the predetermined intervals T3 and T4 are 150 mm, but are not limited to this. T3 and T4 may be the same distance or different distances.

[0030] In this embodiment, the string-like members 23 are made of the same material as the material forming the sheet body 21. In this embodiment, the sheet body 21 and the string-like members 23 are made of cotton, but this is not limited to this and may be a mixture of cotton with hemp or silk, or a mixture of cotton with chemical fibers such as polyester.

[0031] In this embodiment, the thickness of the string-like member 23 is 1.5 mm or less, and preferably 1.0 mm or less. Note that a cotton twill tape having a thickness of 1.5 mm or less may be used as the string-like member 23.

[0032] [Overall configuration of the hook-and-loop member 10] Next, the overall configuration of the hanging member 10 for pulling each side of the mattress sheet 20 according to this embodiment in a direction substantially perpendicular to the side will be described with reference to Figures 2 and 3. Figure 2 is a schematic diagram showing the overall configuration of the hanging member 10. Figure 2(a) is a perspective view, and Figure 2(b) is a plan view. Figure 3 is a schematic diagram showing the state in which the hanging member 10 is hooked onto one of the short sides 21a of the mattress sheet 20 according to this embodiment.

[0033] 2, the hanging member 10 is composed of a plate portion 11 that is generally rectangular in plan view and is long in one direction, and a plurality of hanging portions 12 that are formed on the long sides of the plate portion 11 and can be detached from hook portions 22 of a mattress sheet 20 according to this embodiment. That is, a plurality of hanging portions 12 made of hook-shaped members are formed on the long sides of the plate portion 11 that is generally rectangular.

[0034] In this embodiment, the multiple hanging parts 12 are evenly spaced apart at a predetermined interval T5 on the plate part 11, but the interval T5 at which the hanging parts 12 are provided is set wider than the intervals T1, T2 at which the hooking parts 22 of the mattress sheet 20 are provided. In other words, the intervals T1, T2 at which the hooking parts 22 of the mattress sheet 20 are provided are set narrower than the interval T5 at which the hanging parts 12 of the hanging member 10 are provided.

[0035] The hanging member 10 thus formed can be used, for example, in a sheet-stretching device described below, to stretch each side of the mattress sheet 20 according to this embodiment in a direction perpendicular to each side.

[0036] To stretch each side of the mattress sheet 20 according to this embodiment in a direction perpendicular to each side using the hanging member 10, the hanging / detaching part 12 is hooked onto the multiple hooking parts 22 provided, as shown in FIG.

[0037] At this time, by creating sewn parts 23t at predetermined intervals T1, T2 along the edges of the string-like members 23 having a predetermined width arranged along the edges of each side 21a, 21b, which are sewn in a direction perpendicular to the edges, the multiple hook parts 22, 22, ... can be created at equal intervals along the edges. Therefore, as long as one simply remembers which position of the equally spaced hook parts 22, 22, ... to hook the release part 12 such as a hook to, in other words, by deciding in advance which hook part 22 from the edge to hook the release part 12 to, there is no need to align the center of the sheet, and even less skilled personnel can neatly stretch the mattress sheet 20 without spending a lot of time. Furthermore, since the string-like member 23 is formed in a generally rectangular shape in plan view having a predetermined width, and the sewn portions 23t are formed in a direction perpendicular to the longitudinal direction of the string-like member 23, when the string-like member 23 is stretched in a direction perpendicular to the longitudinal direction by the hanging member 10, it is less likely to shift in the direction of tension, and has high strength against tension, making it possible to provide a highly durable mattress sheet 20.

[0038] Also, since each string-like member 23 is arranged at a predetermined interval T3, T4 from the end in the extension direction of each side 21a, 21b in the direction along the edge, it is possible to prevent interference between the string-like members 23 arranged along the short side 21a and the string-like members 23 arranged along the long side 21b when sewing each string-like member 23. Also, since the size of a sheet is generally formed to be sufficiently larger than the size of a mattress, it is not necessary to form hook parts 22 on all of the edges, and by arranging the string-like members 23 at a predetermined interval from the end, it is possible to reduce the cost and labor required for forming the hook parts 22.

[0039] Furthermore, since the string-like members 23 are formed from the same material as the sheet body 21, the degree of expansion and contraction of the string-like members can be adjusted to match the degree of expansion and contraction of the sheet body even after repeated washing, drying, ironing, etc., and therefore the sheet can be used continuously for a long period of time.

[0040] Furthermore, since the thickness of the string-like member 23 is set to 1.5 mm or less, and preferably 1.0 mm or less, the load applied to the drum during pressing with the drum can be reduced.

[0041] Furthermore, since the sewn portions 23t are formed approximately evenly at intervals T3, T4 which are narrower than the specified interval T5 at which the hanging portions 12 are provided in the hanging member 10, as long as the correct hooking is made as to which hook portion 22 from the end to which the endmost hanging portion 12 is hooked, then it is possible to neatly stretch the mattress sheet 20 without time wasting by simply pulling each hanging member 10 in a direction perpendicular to each edge, without having to align the center of the sheet.

[0042] [Overall configuration of sheet stretching device 1] The overall configuration of the sheet-stretching device 1 equipped with the hanging / removing member 10 will be described with reference to Figs. 4 and 5. Fig. 4 is a schematic diagram showing the overall configuration of the sheet-stretching device 1 in a simplified manner. Fig. 4(a) shows a perspective view, and Fig. 4(b) shows a plan view. Fig. 5 is an exploded perspective view of the sheet-stretching device 1. In this embodiment, "upper" refers to the upward direction in the direction of gravity, and "lower" refers to the downward direction in the direction of gravity. Furthermore, the surface of a mattress 40, which will be described later, refers to the surface on which a user sits when using the mattress for sleeping, and the underside of the mattress 40 refers to the surface on the bed frame 30 side.

[0043] The sheet-stretching device 1 stretches the mattress sheet 20 according to this embodiment, which is formed in a substantially rectangular shape having two pairs of opposing sides 21a, 21b as shown in Fig. 1 and has a plurality of hooks 22 arranged in parallel along the edges of the two pairs of opposing sides 21a, 21b, without wrinkles, around the mattress 40, which is formed in a substantially rectangular parallelepiped shape and placed above the bed frame 30. The state shown in Fig. 4 is the state before the mattress 40 is placed on the support member 200 of the sheet-stretching device 1.

[0044] The overall configuration of the sheet-stretching device 1 will be described with reference to Figures 4 and 5. As shown in Figure 4, the sheet-stretching device 1 is composed of multiple stretching units 100 arranged to face each other on two sets of opposing edges of the bed frame 30, and a support member 200 arranged between the multiple stretching units 100 on the bed frame 30 and supporting the mattress 40 at a predetermined height.

[0045] The tensioning units 100 are arranged to face each other at two sets of opposing edge portions of the bed frame 30, and at least one of the pair of tensioning units 100 arranged to face each other is configured to be able to reciprocate in a direction perpendicular to the side of the bed frame 30, and can pull the edge of the mattress sheet 20 toward the center of the bed frame 30. For example, in the example shown in FIG. 4, one of a pair of tensioning units 100 facing each other and arranged near the long side of the bed frame 30 can pull the edge of the mattress sheet 20, while the other only holds the edge of the mattress sheet 20. Also, of a pair of tensioning units 100 facing each other and arranged near the short side of the bed frame 30, the foot side tensioning unit 100 can pull the edge of the mattress sheet 20, but the head side tensioning unit 100 only holds the edge of the mattress sheet 20. Thus, in the example shown in Figure 4, one of a pair of tensioning units 100 arranged opposite each other has a structure capable of reciprocating motion, and the other tensioning unit 100 has a fixed structure, but both of the pair of tensioning units 100 arranged opposite each other may have a structure capable of reciprocating motion.

[0046] The support member 200 is installed on the top surface of the bed frame 30 between the bed frame 30 and the mattress 40, and is processed into an appropriate planar shape. The support member 200 is a member that supports the mattress 40, and has a predetermined height higher than the position at which the slide unit 120 reciprocates in the tensioning unit 100 described later so that the slide unit 120 can reciprocate. For example, in this embodiment, the height of the support member 200 is 45 mm, and the height of the tensioning unit 100 is 40 mm. Also, as shown in FIG. 5, the support member 200 is composed of a support 210 formed of a material with cushioning properties capable of supporting the mattress 40, such as polystyrene foam or honeycomb, and a cover body 220 that covers the surface of the support 210, and a groove corresponding to the rail part 112 of the tensioning unit 100 described later is formed in the support 210.

[0047] [Configuration of tensioning unit 100] Next, the tensioning unit 100 having a structure capable of pulling the edge of the mattress sheet 20 will be described with reference to Figs. 2, 6 and 7. Figs.

[0048] Fig. 6 is a schematic diagram for explaining the tensioning unit 100 that can reciprocate in a direction perpendicular to the side of the bed frame 30. Fig. 6(a) shows a perspective view, and Fig. 6(b) shows a plan view. Fig. 2 is a schematic diagram showing the details of the hanging member 10 that constitutes the tensioning unit 100. Fig. 2(a) shows a perspective view, and Fig. 2(b) shows a plan view.

[0049] Each tensioning unit 100 has a base unit 110 formed by a frame-shaped body that is approximately rectangular in plan view and supports a slide unit 120 so that it can move back and forth, the slide unit 120 connected to the base unit 110 so that it can move back and forth in a direction perpendicular to the opposing sides of the bed frame 30, and a hanging member 10 equipped with a hanging part 12 that can be hung and detached from a hook part 22 of a mattress sheet 20.

[0050] The base unit 110 is provided with a frame-shaped base portion 111 which is formed in a roughly rectangular shape when viewed from above and is elongated in a direction parallel to the edge on which it is installed, and which is placed on the bed frame 30, a rail portion 112 for the reciprocating movement of the slide unit 120 described later, and a locking mechanism 113 which regulates the movement of the slide unit 120.

[0051] The base 111 is a member placed on the top surface of the bed frame 30, and is formed of a frame-like member having a generally rectangular shape in a plan view. A rail portion 112 is fixed to the base 111 to support the slide unit 120 so that the slide unit 120 can reciprocate.

[0052] The rail portion 112 is a rod-shaped member fixed to the base portion 111, and is extended so as to face in a direction perpendicular to the side of the bed frame 30 when the extension unit 100 is placed on the edge of the bed frame 30.

[0053] The locking mechanism 113 positions the slide unit 120 that has been moved to an appropriate position so that it does not move unexpectedly, and is composed of a pressing member that can reciprocate in a direction perpendicular to the direction in which the slide unit 120 reciprocates. The pressing member has an uneven portion that can engage with an uneven portion formed in the engagement portion 124 described later, and restricts the movement of the slide unit 120 by pressing the pressing member while the uneven portion of the locking mechanism 113 and the uneven portion of the engagement portion 124 are engaged. Note that the locking mechanism 113 may be any mechanism that can prevent unexpected movement of the slide unit 120, and may be any mechanism other than an uneven portion, such as a clamping mechanism or a pressing mechanism.

[0054] Next, a description will be given of the slide unit 120. The slide unit 120 includes a tray 121 that stores the hanging member 10, a retaining portion 122 that prevents the hanging member 10 from falling off the tray 121, a guide portion 123 that is slidably connected to the rail portion 112 of the base unit 110, and an engagement portion 124 that cooperates with the lock mechanism 113 of the base unit 110 to regulate the movement of the slide unit 120.

[0055] The tray 121 is a frame-like member formed in a generally rectangular shape in a plan view elongated in a direction parallel to the edge to be installed, below the position where the support member 200 supports the mattress 40, and capable of reciprocating in a direction perpendicular to the side of the bed frame 30. The tray 121 according to this embodiment has a storage section 121a capable of storing the hanging / detaching member 10 inside the member formed in a frame shape.

[0056] The retaining portion 122 is a member that prevents the detachable member 10 housed in the housing portion 121a from falling out, and is formed of a plate-like member that is rotatably connected to the tray 121 by a hinge 122a. In other words, the retaining portion 122 is provided with the hinge 122a that allows it to rotate with respect to the tray 121, and is configured to be switchable between a retained state in which the plate-like body is in a substantially horizontal state and an open state in which the plate-like body faces a substantially vertical direction. With this configuration, the retaining portion 122 is configured to be switchable between a retained state in which the detachable member 10 housed in the housing portion 121a is partially covered from above and an open state in which the detachable member 10 is not covered. Then, the retaining portion 122 is housed in the housing portion 121a and then set to the retained state, whereby the detachable member 10 follows the tray 121. Note that the configuration of the retaining portion 122 is not limited to this, and may be a hole or a slit, etc., as long as it is configured to prevent the detachable member 10 from falling out.

[0057] The guide portion 123 is a rod-shaped member having an insertion hole through which the rail portion 112 provided on the base unit 110 can be inserted, and is fixed to the rear surface side of the tray 121. The rail portion 112 of the base unit 110 reciprocates within the insertion hole of the guide portion 123 of the slide unit 120, thereby enabling the slide unit 120 to slide relative to the base unit 110. Note that the guide portion 123 may be configured to be reciprocable relative to the rail portion 112, and may be something other than a rod-shaped member having an insertion hole.

[0058] The engaging portion 124 is a rod-shaped member fixed to the tray 121 and / or the guide portion 123, and has a plurality of projections and recesses formed along the reciprocating direction. The projections and recesses formed along the reciprocating direction of the engaging portion 124 cooperate with the projections and recesses of the locking mechanism 113 described above to regulate the movement of the slide unit 120.

[0059] 6 shows the tensioning unit 100 that can reciprocate in a direction perpendicular to the side of the bed frame 30, but as for the tensioning unit 100 with a fixed structure that does not reciprocate, as shown in Fig. 7, it is composed only of the tray 121 and the retaining part 122 of the tensioning unit 100 that can reciprocate, so the explanation is omitted. As shown in Fig. 7, the base part 110 in the tensioning unit 100 with a fixed structure that does not reciprocate is composed of a frame-shaped member that is approximately rectangular in plan view and located below the tray 121.

[0060] As shown in Fig. 2, Fig. 6 and Fig. 7, the hanging member 10 according to this embodiment is composed of a plate part 11 having a generally rectangular shape in plan view, elongated in a direction parallel to the edge where the tensioning unit 100 is installed, and a plurality of hanging parts 12 formed on one longitudinal side of the plate part 11, which can be hung on and detached from hook parts 22 on the edge of the mattress sheet 20. That is, a plurality of hanging parts 12 made of hook-shaped members are formed on the long side of the plate part 11 formed in a generally rectangular shape. The hanging parts 12 are set so that when the tray 120 is moved toward the center of the bed frame 30, the hanging parts 12 of the mattress sheet 20 engaged with the hanging parts 12 are pulled in the same direction.

[0061] [Procedure for stretching sheets using sheet stretching device 1] Next, the procedure for stretching the mattress sheet 20 according to this embodiment using the sheet-stretching device 1 will be described with reference to Figs. 8 to 10. Fig. 8 is a schematic diagram showing the procedure for spreading the mattress sheet 20 according to this embodiment, which is the target of the sheet-stretching device 1, on the mattress 40, Fig. 9 is a schematic diagram showing the procedure for hanging the mattress sheet 20 on the removable member 10, and Fig. 10 is a schematic diagram showing the state in which the mattress sheet 20 is stretched using the sheet-stretching device 1. In Figs. 8 and 10, the sheet-stretching device 1 is hardly shown because it is sandwiched between the mattress 40 and the bed frame 30. At this time, the mattress 40 is placed on the support member 200, and the slide units 120 are in a state in which they can reciprocate without being restricted in their movements.

[0062] First, as shown in Figs. 8(a) to (c), the mattress sheet 20 is spread over the mattress 40 placed on the support member 200 of the sheet-stretching device 1 (step S100).

[0063] At this time, since each side of the mattress sheet 20 is larger than the sides of the mattress 40, the end of the long side 21b may be folded so that the hook portion 22 provided on the long side 21b is placed on the mattress 40, as shown in Figure 8 (c).

[0064] In this embodiment, as shown in Figure 8(a), the mattress sheet 20 is wound around the winding rod 50 with the end of the long side 21b folded, and the winding rod 50 around which the mattress sheet 20 is wound is rolled over the mattress 40 (Figure 8(b)), thereby spreading the mattress sheet 20 out onto the mattress 40. In this way, by simply rolling the winding rod 50 over the mattress 40, the mattress sheet 20 can be spread out with the hook portion 22 of the long side 21b exposed above the mattress 40, as shown in Figure 8(c).

[0065] It should be noted that the winding rod 50 as shown in Figure 8(a) is not essential, and as long as the mattress sheet 20 of this embodiment can be spread out on the mattress 40, it is possible to spread it out from a folded rectangular state, for example, without using the winding rod 50.

[0066] Next, as shown in FIG. 9, the hooking portion 12 of the hanging member 10 is hooked to the hooking portion 22 provided on the long side 21b of the mattress sheet 20, and the hooking portion 12 of the hanging member 10 is hooked to the hooking portion 22 provided on the short side 21a (step S110). At this time, as shown in FIG. 9(a) and FIG. 9(b), the hanging member 12 is hooked to the hooking portion 22 so that the hanging member 12 is located outside the mattress 40. After the hanging member 12 is hooked to the hooking portion 22, the hanging member 10 may be turned over several times on the mattress 40 so that the mattress sheet 20 is wrapped around the hanging member 10. By performing this operation, the mattress sheet 20 can be pulled reliably when the hanging member 10 is stored in the storage portion 121a and stretched. The above-mentioned operation of engaging and inverting is performed for all of the hooking members 10 engaged with the long sides 21b and short sides 21a. In this embodiment, as shown in Fig. 9(b), one hooking member 10 is attached to the hook portion 22 of one long side 21b, one hooking member 10 is attached to the hook portion 22 of one short side 21a, and a total of four hooking members 10 are attached to two sets of short sides 21a and long sides 21b.

[0067] Then, although not shown, the hanging members 10 attached to the hooking portions 22 on the short side 21a and the hooking portions 22 on the long side 21b are accommodated in the accommodation portions 121a of the trays 121 in the tensioning units 100 arranged on the corresponding edges (step S120). At this time, the trays 121 provided in the slide units 120 are slid out from below the mattress 40, and the hanging members 10 are accommodated in the accommodation portions 121a. This operation of accommodating the hanging members 10 in the accommodation portions 121a of the trays 121 is performed for all four hanging members 10.

[0068] Then, the retaining portion 122, which is rotatably connected to the tray 121 by means of the hinge 122a, is tilted horizontally to bring the hook-and-loop member 10 into a retaining state in which the hook-and-loop member 10 is prevented from slipping out of the storage portion 121a (step S130).

[0069] Furthermore, in the tensioning unit 100 equipped with the slide unit 120, the tray 121 is manually pushed in and moved toward the center of the mattress 40 (step S140). This action allows the hooking part 12 on the back side of the mattress 40 to pull the hooking part 22 of the mattress sheet 20 toward the center of the mattress 40, and at least in the area where the hooking part 12 is installed, the mattress sheet 20 can be folded toward the back side of the mattress 40 without wrinkling.

[0070] At this time, in the sheet stretching device 1, as shown in FIG. 4, a fixed structure stretching unit 100 without a slide unit 120 is arranged on the side opposite the stretching unit 100 equipped with a slide unit 120, so that the end of one side of the mattress sheet 20 can be pulled by the slide unit 120 starting from the fixed structure stretching unit 100, and the end of the mattress sheet 20 can be folded onto the back side of the mattress 40 without forming wrinkles on the opposing pair of sides.

[0071] By performing the same operation on the other pair of opposing sides, the ends of the mattress sheet 20 can be pulled on the opposing long and short sides starting from the fixed structure tensioning unit 100, and the ends of the mattress sheet 20 can be folded onto the back side of the mattress 40 without forming wrinkles, as shown in Figure 9.

[0072] In addition, if both of the tensioning units 100 arranged on a pair of opposing sides are equipped with slide units 120, the ends of the mattress sheet 20 can be pulled by the slide units 120 one by one.

[0073] According to the sheet stretching device 1 configured in this manner, the sheet stretching device 1 is made up of a plurality of stretching units 100 arranged facing each other and a support member 200 arranged between the plurality of stretching units 100 and supporting the mattress 40 at a predetermined height. Therefore, by appropriately arranging the plurality of stretching units 100 on the bed frame 30, it is possible to provide a sheet stretching device 1 capable of stretching the mattress sheet 20 in directions perpendicular to each of the long and short sides, regardless of the size of the bed.

[0074] Furthermore, since each stretching unit 100 is formed by a unit including a base unit 110, a tray 121, and a hanging member 10, by preparing multiple stretching units 100, it is possible to provide a sheet-stretching device 1 that can be applied to beds of various sizes.

[0075] Moreover, since the base unit 110, which plays a role in supporting the tensioning unit 100, is formed separately from the support member 200 that supports the mattress 40, it is only necessary to change the shape and size of the support member 200 to accommodate slight differences in the size of the bed frame 30 or the mattress 40, and bed frames 30 of different sizes can be accommodated without changing the size of the tensioning unit 100 including the base unit 110. In other words, since the tensioning unit 100 is not involved in supporting the mattress 40, even if there are differences in the sizes of the bed frame 30 or the mattress 40, there is no need to change the size of the tensioning unit 100 itself, and a tensioning unit 100 of a predetermined size can be used to accommodate beds of various sizes, facilitating mass production and leading to cost reduction.

[0076] Furthermore, at least one of the opposing tensioning units 100 is installed on the base unit 110 below the position where the support member 200 supports the mattress 40, so that the tray 121 can move back and forth in a direction perpendicular to the opposing sides of the bed frame 30, and since the hanging member 10 moves following the tray 121, by simply pushing the tray 121 toward the center of the mattress 40 with the hanging part 12 hooked onto the hook part 22 of the mattress sheet 20, the end part of the mattress sheet 20 can be easily folded toward the back side of the mattress 40, and the mattress sheet 20 can be tensioned over the mattress 40 without effort and without wrinkles.

[0077] In addition, the tray 121 includes a roughly square-shaped storage section 121a for storing the hanging member 10, and includes a retaining section 122 at the end of the storage section 121a for preventing the stored hanging member 10 from falling out, and the hanging member 10 is composed of a plate section 11 having a hooking section 12 that can be hooked and detached to the hooking section 22, so that the hanging member 10 can be removed from the tray 121 as needed. Therefore, the operation of hooking the hooking section 12 of the hanging member 10 removed from the tray 121 to the hooking section 22 provided at the end of the mattress sheet 20 can be easily performed, and the stretching work can be performed more easily. In addition, by positioning the hanging member 10 below the retaining section 122 with the hooking section 12 hooked to the hooking section 22, the hanging member 10 can be stretched while being prevented from falling out of the tray 121.

[0078] Furthermore, since tray 121 can move back and forth in a direction perpendicular to a pair of opposing sides using rail portion 112 provided on base unit 110, a mechanism for reciprocating movement can be constructed without using a complex mechanism.

[0079] In addition, a lock mechanism 113 is further provided to restrict the movement of the tray 121, so that the tray 121 can be moved to a desired position, tension can be applied, and then the desired position can be maintained.

[0080] In addition, since the hook-and-loop portion 12 is composed of a plurality of hook-shaped members, the end of the sheet 20 within a specified range can be pulled simply by moving one tray 121, thereby saving the effort required to tension the mattress sheet 20.

[0081] As an example of the sheet-stretching device 1, a device has been shown in which the mattress sheet 20 is stretched by using a slide unit 120 that reciprocates in a direction perpendicular to the opposing sides of the bed frame 30 below the position where the support member 200 supports the mattress 40, but this is not limited to this, and the device may also be one that uses a slide unit that reciprocates in the vertical direction below the mattress 40 to stretch the mattress sheet 20.

[0082] Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Furthermore, the effects described in the embodiments of the present invention are merely a list of the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments of the present invention.

[0083] Furthermore, the above-described embodiment has been described in detail in order to clearly explain the present invention, and the present invention is not necessarily limited to having all of the configurations described. [Industrial Applicability]

[0084] The mattress sheet of the present invention can be applied to mattresses installed in facilities where bed making requires a great deal of effort, such as beds in hotels and nursing homes. The technology of the present invention can be applied not only to bed sheets, but also to equipment that requires various types of cloth to be covered, such as covers for sofas and train seats. [Explanation of symbols]

[0085] 1 Sheet tensioning device 100 Tensioning Unit 110 Base Unit 111 Base 112 Rail section 113 Locking mechanism 120 Slide unit 121 Tray 121a Storage unit 122 Stopper 122a Hinge 123 Guide part 124 Engagement part 200 Support member 210 Storage unit 220 Cover body 10. Hanging and Detachable Member 11 Plate section 12 Hanging section 20 Mattress Sheets 21 Sheet body 21a Short side 21b Long side 22 Hook 23 String-like member 23t Sewing section 30 Bed Frame 40 Mattress 50 Winding rod

Claims

1. A mattress sheet comprising a sheet body formed in a substantially rectangular shape having two pairs of opposing sides, and a plurality of hooks for pulling each side of the sheet body in a direction substantially perpendicular to the side, the plurality of hook portions are formed by sewing portions, which are sewn to a string-like member having a predetermined width and disposed along the edge of each side, in a direction perpendicular to the edge, at predetermined intervals along the edge; Sheets for mattresses.

2. The string-like members are arranged at predetermined intervals from the ends of the sides in the extending direction along the edges.

2. A sheet for a mattress according to claim 1.

3. The string-shaped member is formed from the same material as the material forming the sheet body.

2. A sheet for a mattress according to claim 1.

4. The thickness of the string-like member is 1.5 mm or less.

2. A sheet for a mattress according to claim 1.

5. The plate is stretched using a hook-and-loop member that moves in a direction substantially perpendicular to each side, and the hook-and-loop member is composed of a plate portion that is substantially rectangular in plan view and a plurality of hook-and-loop portions that are provided at predetermined intervals on the long sides of the plate portion and can be hooked and detached from the hook portions, The interval at which the sewn portions are formed is set to be narrower than the interval at which the release portions are provided. A sheet for a mattress according to any one of claims 1 to 4.

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