bed guard

Abstract

To provide a bed guard capable of suppressing the occurrence of a gap between a mattress and a partition member even when an infant comes into contact with the mattress, regardless of the thickness of the mattress. [Solution] A bed guard 11 is provided with four support posts 12, 13, 14, 15, an upper frame 16 and a lower frame 17 connected to each support post, and a partition member 18, and is attached to a mattress M of a bed body B. The four support posts 12, 13, 14, 15 have upper engagement portions 12a, 13a, 14a, 15a that engage with the upper surface of the mattress M so that the lower frame 17 overlaps the side of the mattress M when viewed from the side of the mattress M, and are connected to the upper frame 16 and the lower frame 17 so as to be positioned at the corners of the mattress M, respectively.

Description

[Technical Field]

[0001] The present invention relates to a bed guard. [Background technology]

[0002] When infants lie in a bed, they often turn over and change their body position to distribute their weight on the surface that comes into contact with the bedding, to regulate their body temperature, and to develop their muscles and motor functions. When infants lie in an adult bed, a bed guard is provided on the bed to restrict the range of the infant's turning over and movement and to prevent the bedding from slipping off.

[0003] The bed guard has a guard section that rises vertically and an insertion section that is connected to the guard section. The bed guard is held against the mattress by inserting the insertion section between the bed body and the mattress placed on the bed body. However, since the bed guard is only sandwiched between the bed body and the mattress, it may become displaced when an infant rolls over and comes into contact with the guard section. Therefore, bed guards that prevent displacement against the mattress are known.

[0004] Patent Document 1 discloses a bed quilt slip prevention device that has an engaging protrusion that protrudes upward from the tip of the insertion part. The engaging protrusion, located under the mattress, digs into the underside of the mattress, and the bed quilt prevention device is fixed to the bed body with a fixing belt that passes under the mattress and hooks onto the bed body, making it difficult for the bed quilt prevention device to move relative to the mattress. This makes it possible to prevent the bed quilt prevention device from slipping out of position relative to the mattress even if an infant or toddler comes into contact with it when turning over in their sleep, etc. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-217676 Summary of the Invention [Problem to be solved by the invention]

[0006] The bedclothes slip prevention device described in Patent Document 1 has a guard frame that rises upward from the underside of the mattress. An insert is connected to the lower end of the guard frame. A mesh guard cover is also attached to the guard frame. With this type of bedclothes slip prevention device, if an infant or toddler comes into contact with the guard cover due to rolling over or other reasons, the guard portion maintains its position relative to the mattress, and only the cloth guard cover elastically deforms. Therefore, even though the bedclothes slip prevention device prevents slippage relative to the mattress, as the mattress becomes thicker, a gap may form between the guard cover, which serves as the partition member of the bedclothes slip prevention device, and the mattress, potentially causing the body to become trapped between the guard cover and the mattress or the bedding to fall in. Furthermore, with this bedclothes slip prevention device, the fixing belt may loosen during use, creating a gap between the guard cover and the mattress.

[0007] An object of the present invention is to provide a bed guard that prevents the occurrence of a gap between the mattress and the partition member even if a portion of the partition member elastically deforms, regardless of the thickness of the mattress. [Means for solving the problem]

[0008] The present inventors have studied a bed guard that can prevent gaps from forming between the mattress and the partition member even when an infant comes into contact with the mattress, regardless of the thickness of the mattress. As a result of extensive research, the present inventors have come up with the following configuration.

[0009] A bed guard according to an embodiment of the present invention is a bed guard that is attached to a mattress of a bed and includes at least four vertically extending support posts, an upper frame connected to the upper ends of adjacent support posts, a lower frame connected to the lower ends of adjacent support posts, and a partition member supported by the upper and lower frames. The four support posts have upper engagement portions that engage with the upper surface of the mattress so that the lower frame and the side of the mattress overlap when viewed from the side of the mattress, and are connected to the upper and lower frames so as to be located at the corners of the mattress, respectively.

[0010] In the above-mentioned configuration, the four support posts connected to each other by the upper frame and the lower frame are arranged at the four corners of the mattress. The four support posts are engaged with the upper surface of the mattress by the upper engagement parts. In this case, the bed guard is arranged so that the lower frame contacts at least three sides of the mattress, thereby restricting movement of the mattress in two directions perpendicular to the sides.

[0011] The depth of the gap formed between the mattress and the partition member is proportional to the vertical width of the partition member overlapping the side of the mattress when viewed from the side of the mattress. Since the bed guard engages with the upper surface of the mattress, the lower frame can be positioned near the upper surface of the mattress regardless of the thickness of the mattress. In this way, by positioning the lower frame near the upper surface of the mattress and engaging the lower frame with the side of the mattress, the bed guard restricts left-right and front-back movement relative to the mattress and reduces the depth of the gap between the mattress and the partition member. This makes it possible to prevent the formation of a gap between the mattress and the partition member even when an infant comes into contact with the mattress, regardless of the thickness of the mattress.

[0012] According to another aspect, the bed guard of the present invention may include the following configuration: a lower engagement portion that engages with the underside of the mattress, and a support post connecting member that connects the lower end of the support post to the lower engagement portion and moves the lower engagement portion up and down relative to the support post. The support post connecting member adjusts the distance between the upper engagement portion and the lower engagement portion so that the mattress is sandwiched between the upper engagement portion and the lower engagement portion.

[0013] In the above-described configuration, the position of the lower engagement portion relative to the support pole can be adjusted using the support pole connecting member, allowing the upper and lower engagement portions provided at the lower end of the support pole to engage with the mattress. In other words, the bed guard can sandwich the mattress of any thickness between the upper and lower engagement portions. By sandwiching the mattress from above and below, the bed guard can prevent the support pole from moving vertically relative to the mattress. This prevents a gap from forming between the mattress and the partition member, even if an infant comes into contact with the mattress, regardless of the thickness of the mattress.

[0014] According to another aspect, the bed guard of the present invention may include the following configuration: The support pole connecting member is configured to be separated from the support pole.

[0015] According to the above-mentioned configuration, the bed guard can be removed from the mattress by separating the support post connecting members from the support posts, with the lower engagement parts engaged with the underside of the mattress, and the four support posts, the upper frame and the lower frame connected to the four support posts, and the partition member. The bed guard can be removed from the mattress without disassembly. This allows the bed guard installed on the mattress to be moved to the floor or the like while maintaining its shape and used as a playpen.

[0016] According to another aspect, the bed guard of the present invention may include the following configuration: A lower engagement portion connecting member that connects the lower engagement portions to each other. The lower engagement portion connecting member connects the lower engagement portions located diagonally opposite each other of the mattress in a state where they are engaged with the underside of the mattress.

[0017] In the above-mentioned configuration, the lower engagement parts located diagonally on the underside of the mattress are connected to each other, thereby fixing the positions of the lower engagement parts relative to the mattress and the relative positions of the lower engagement parts. This allows the bed guard to restrict movement of the bed guard in the up-down, left-right, and front-back directions relative to the mattress. This prevents gaps from forming between the mattress and the partition member even when an infant comes into contact with the mattress, regardless of the thickness of the mattress.

[0018] According to another aspect, the bed guard of the present invention may include the following configuration: A part of the upper frame, the lower frame and the partition member located between adjacent ones of the four pillars are configured as a door.

[0019] In the above-described configuration, even if the bed guard is configured as an enclosure without an opening when viewed from the side of the mattress, the bed guard has an openable door, allowing easy entry into the enclosure. Furthermore, the bed guard may have the door between the upper and lower frames connected to one of two support posts and the upper and lower frames connected to the other support post. In this case, the two support posts are prevented from wobbling relative to the mattress by the upper and lower frames connected to them, respectively. This configuration allows the bed guard to prevent gaps from forming between the mattress and the partition member, even when the door is provided.

[0020] According to another aspect, the bed guard of the present invention may include the following configuration: The bed guard further includes a raising member connected to the lower surface of the upper engagement part, and the raising member is configured so that the difference between the lower surface of the raising member connected to the lower surface of the upper engagement part and the lower end of the lower frame falls within a predetermined range.

[0021] In the above-mentioned configuration, by attaching the raising member to the underside of the upper engagement part of the bed guard, the difference between the lower surfaces of the four pillars, which are the undersides of the raising member, and the lower end of the lower frame is within a predetermined range. Therefore, when the bed guard is installed on the floor or the like as a playpen, the posture of the four pillars can be stabilized by the raising member.

[0022] The terminology used herein is for the purpose of defining particular embodiments only and is not intended to be limiting of the invention.

[0023] As used herein, the use of "including," "comprising," or "having" and variations thereof identify the presence of stated features, steps, operations, elements, components, and / or equivalents thereof, but may include one or more of the steps, operations, elements, components, and / or groups thereof.

[0024] As used herein, the terms "attached," "connected," "coupled," and / or their equivalents are used broadly to encompass both "direct and indirect" attachments, connections, and couplings. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but may include direct or indirect electrical connections or couplings. Additionally, as used herein, "rotate" means to rotate in at least one direction within a predetermined angular range.

[0025] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. [Effects of the Invention]

[0026] According to one embodiment of the present invention, the bed guard is placed on the upper surface of the mattress so that the lower frame is near the upper surface of the mattress and overlaps the four sides of the mattress when viewed from the side, thereby preventing a gap from forming between the mattress and the partition member even when an infant comes into contact with the mattress, regardless of the thickness of the mattress. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a perspective view of a bed guard according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of the lower engagement portion of the bed guard in the embodiment of the present invention. [Figure 3] FIG. 3 is a side view of the bed guard showing the procedure for placing the bed guard on a mattress in the embodiment of the present invention. [Figure 4] FIG. 4 is a side view showing a procedure for fixing the bed guard to the mattress in the embodiment of the present invention. [Figure 5] FIG. 5 is a side view showing a state in which the bed guard according to the embodiment of the present invention is attached to a mattress. [Figure 6] FIG. 6 is a cross-sectional view taken along line VV in FIG. [Figure 7] FIG. 7 is a side view of a bed guard having a door according to the first modification of the embodiment of the present invention. [Figure 8] FIG. 8 is a partially enlarged cross-sectional view of a support post of a bed guard in the second modification of the embodiment of the present invention. [Figure 9] FIG. 9 is a perspective view of a bed guard according to the third modification of the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] Below, a bed guard 11, which is an embodiment of the bed guard according to the present invention, will be described with reference to the drawings. In each drawing, the same parts are given the same reference numerals, and the description of the same parts will not be repeated. The dimensions of the components in each drawing do not faithfully represent the actual dimensions of the components and the dimensional ratios of each component.

[0029] <Embodiment> <Overall structure> A bed guard 11 according to a first embodiment of the present invention will be described with reference to Figures 1 and 2. Figure 1 is a perspective view of the bed guard 11 according to the first embodiment of the present invention. Figure 2 is a plan view of the lower engagement portions 23, 24, 25, and 26 of the bed guard 11.

[0030] As shown in FIG. 1, the bed guard 11 is a partition that restricts the range of a baby's turning over and movement. The bed guard 11 is attached to a mattress M placed on the support surface of the bed body B. The bed guard 11 includes a first support pillar 12, a second support pillar 13, a third support pillar 14, a fourth support pillar 15, four upper frames 16, four lower frames 17, a partition member 18, a first support pillar connecting member 19, a second support pillar connecting member 20, a third support pillar connecting member 21, a fourth support pillar connecting member 22, a first lower engagement portion 23, a second lower engagement portion 24, a third lower engagement portion 25, a fourth lower engagement portion 26, a first lower engagement portion connecting member 27, and a second lower engagement portion connecting member 28. The bed guard 11 is configured so that the first support pillar 12, the second support pillar 13, the third support pillar 14, and the fourth support pillar 15 can be positioned at the corners of the mattress M.

[0031] The first support column 12, the second support column 13, the third support column 14, and the fourth support column 15 support the upper frame 16 and the lower frame 17. The first support column 12, the second support column 13, the third support column 14, and the fourth support column 15 are all support columns having the same height. When viewed in the axial direction, the first support column 12, the second support column 13, the third support column 14, and the fourth support column 15 have a shape in which a plate-like member is bent approximately vertically. The first support column 12, the second support column 13, the third support column 14, and the fourth support column 15 are made of, for example, resin.

[0032] The first support pillar 12, the second support pillar 13, the third support pillar 14, and the fourth support pillar 15 are positioned in a positional relationship that allows them to be attached to the corners of the mattress M. The first support pillar 12 is positioned adjacent to the second support pillar 13 and the fourth support pillar 15. The third support pillar 14 is positioned adjacent to the second support pillar 13 and the fourth support pillar 15. The bed guard 11 is, for example, positioned in a rectangular shape with the first support pillar 12 as the base and the second support pillar 13, the third support pillar 14, and the fourth support pillar 15 arranged in this order clockwise. The first support pillar 12 and the third support pillar 14 are located on a diagonal line of the rectangle. The second support pillar 13 and the fourth support pillar 15 are located on a diagonal line of the rectangle.

[0033] The four upper frames 16 connect the first support column 12, the second support column 13, the third support column 14, and the fourth support column 15, respectively. Both ends of one upper frame 16 are connected to the upper end of the first support column 12 and the upper end of the second support column 13, respectively. Both ends of one upper frame 16 are connected to the upper end of the second support column 13 and the upper end of the third support column 14, respectively. Both ends of one upper frame 16 are connected to the upper end of the third support column 14 and the upper end of the fourth support column 15, respectively. Both ends of one upper frame 16 are connected to the upper end of the fourth support column 15 and the upper end of the first support column 12, respectively. The upper frames 16 are made of, for example, resin or aluminum alloy. The upper ends of partition members 18 are attached to each of the four upper frames 16. Thus, the four upper frames 16 are configured in a ring shape via the four supports.

[0034] The four lower frames 17 connect the first support column 12, the second support column 13, the third support column 14, and the fourth support column 15, respectively. Both ends of one lower frame 17 are connected to the lower end of the first support column 12 and the lower end of the second support column 13, respectively. Both ends of one lower frame 17 are connected to the lower end of the second support column 13 and the lower end of the third support column 14, respectively. Both ends of one lower frame 17 are connected to the lower end of the third support column 14 and the lower end of the fourth support column 15, respectively. Both ends of one lower frame 17 are connected to the lower end of the fourth support column 15 and the lower end of the first support column 12, respectively. The lower frames 17 are made of, for example, resin or aluminum alloy. The lower ends of partition members 18 are attached to each of the four lower frames 17. Thus, the four lower frames 17 are configured in a ring shape via the four supports.

[0035] The partition member 18 separates the upper frame 16 from the lower frame 17, the first support column 12 from the second support column 13, the second support column 13 from the third support column 14, the third support column 14 from the fourth support column 15, and the fourth support column 15 from the first support column 12. The upper end of the partition member 18 is attached to the upper frame 16. The lower end of the partition member 18 is attached to the lower frame 17.

[0036] The lower end of the first support pillar 12 is provided with a first upper engagement portion 12a that engages with the upper surface of the mattress M. The lower end of the second support pillar 13 is provided with a second upper engagement portion 13a that engages with the upper surface of the mattress M. The lower end of the third support pillar 14 is provided with a third upper engagement portion 14a that engages with the upper surface of the mattress M. The lower end of the fourth support pillar 15 is provided with a fourth upper engagement portion 15a that engages with the upper surface of the mattress M. The first upper engagement portion 12a, the second upper engagement portion 13a, the third upper engagement portion 14a, and the fourth upper engagement portion 15a are, for example, plate-like members that extend in a direction perpendicular to the corresponding support pillars 12, 13, 14, and 15 and in the direction of the mattress M. In each of the pillars 12, 13, 14, and 15, a recess is formed by the underside of the first upper engagement portion 12a, the second upper engagement portion 13a, the third upper engagement portion 14a, and the fourth upper engagement portion 15a and the side surface of each pillar 12, 13, 14, and 15, into which the corners of the mattress M fit. Each of the pillars 12, 13, 14, and 15 is positioned relative to the mattress M by fitting the corners of the mattress M into the recess.

[0037] The first upper engagement portion 12a, the second upper engagement portion 13a, the third upper engagement portion 14a, and the fourth upper engagement portion 15a are arranged on the respective pillars 12, 13, 14, and 15 so that, when viewed from the side of the mattress M, the respective lower frames 17 connected to the respective pillars 12, 13, 14, and 15 overlap with the side of the mattress M. In this embodiment, the first upper engagement portion 12a, the second upper engagement portion 13a, the third upper engagement portion 14a, and the fourth upper engagement portion 15a are arranged on the respective pillars 12, 13, 14, and 15 so that the upper ends of the respective lower frames 17 are at the same height (vertical position) as the upper surface of the mattress M.

[0038] The first column connecting member 19 is a member that connects the first column 12 to the first lower engagement portion 23. The second column connecting member 20 is a member that connects the second column 13 to the second lower engagement portion 24. The third column connecting member 21 is a member that connects the third column 14 to the third lower engagement portion 25. The fourth column connecting member 22 is a member that connects the fourth column 15 to the fourth lower engagement portion 26. The first column connecting member 19, the second column connecting member 20, the third column connecting member 21, and the fourth column connecting member 22 are each formed, for example, by a belt member whose length is adjustable. The first column connecting member 19, the second column connecting member 20, the third column connecting member 21, and the fourth column connecting member 22 are configured so that the vertical positions of the lower engagement portions 23, 24, 25, and 26 relative to the columns 12, 13, 14, and 15 can be adjusted. Furthermore, the first support column connecting member 19, the second support column connecting member 20, the third support column connecting member 21 and the fourth support column connecting member 22 are configured so as to be directly connectable to the lower ends of the respective support columns 12, 13, 14 and 15.

[0039] 2, the first lower engagement portion 23, the second lower engagement portion 24, the third lower engagement portion 25, and the fourth lower engagement portion 26 are members that engage with the underside of the mattress M. The first lower engagement portion 23, the second lower engagement portion 24, the third lower engagement portion 25, and the fourth lower engagement portion 26 are, for example, plate-shaped members. Each of the lower engagement portions 23, 24, 25, and 26 has a lower engagement surface 23a, 24a, 25a, and 26a that contacts the underside of the mattress M, a first lateral engagement surface 23b, 24b, 25b, and 26b that contacts one side surface that constitutes a corner of the mattress M, and a second lateral engagement surface 23c, 24c, 25c, and 26c that contacts the other side surface that constitutes the corner of the mattress M. The first side engagement surfaces 23b, 24b, 25b, 26b and the second side engagement surfaces 23c, 24c, 25c, 26c extend in a direction substantially perpendicular to the lower engagement surfaces 23a, 24a, 25a, 26a. Each lower engagement surface 23a, 24a, 25a, 26a is configured to be able to connect the column connecting members 19, 20, 21, 22 to the first lower engagement portion connecting member 27 or the second lower engagement portion connecting member 28.

[0040] The first lower engagement portion 23 has its vertical position adjusted relative to the first upper engagement portion 12a by the first support column connecting member 19. The second lower engagement portion 24 has its vertical position adjusted relative to the second upper engagement portion 13a by the second support column connecting member 20. The third lower engagement portion 25 has its vertical position adjusted relative to the third upper engagement portion 14a by the third support column connecting member 21. The fourth lower engagement portion 26 has its vertical position adjusted relative to the fourth upper engagement portion 15a by the fourth support column connecting member 22.

[0041] <Attaching to the bed> Next, a method for attaching the bed guard 11 to the mattress M will be described with reference to Figs. 1 to 6. Fig. 2 is a side view of the bed guard 11 showing the procedure for placing the bed guard 11 on the mattress M. Fig. 3 is a side view showing the procedure for fixing the bed guard 11 to the mattress M. Fig. 4 is a side view showing the state in which the bed guard 11 is attached to the mattress M. Fig. 5 is a VV cross-sectional view of Fig. 4. The mattress M is placed on the placement surface of the bed body B. The thickness of the mattress M is defined as t.

[0042] As shown in FIG. 3, before attaching the bed guard 11 to the mattress M, the vertical positions of the first lower engagement portion 23, the second lower engagement portion 24, the third lower engagement portion 25, and the fourth lower engagement portion 26 are adjusted. The first support post connecting member 19 is adjusted so that the distance between the first lower engagement portion 23 and the first upper engagement portion 12a is a length t1 that is greater than the thickness t of the mattress M. The second support post connecting member 20 is adjusted so that the distance between the second lower engagement portion 24 and the second upper engagement portion 13a is a length t1 that is greater than the thickness t of the mattress M. The third support post connecting member 21 is adjusted so that the distance between the third lower engagement portion 25 and the third upper engagement portion 14a is a length t1 that is greater than the thickness t of the mattress M. The fourth support post connecting member 22 is adjusted so that the distance between the fourth lower engagement portion 26 and the fourth upper engagement portion 15a is a length t1 that is greater than the thickness t of the mattress M.

[0043] Next, the first support pillar 12, the second support pillar 13, the third support pillar 14, and the fourth support pillar 15 are respectively positioned at the corners of the mattress M. The first support pillar 12 engages the first upper engagement portion 12a with the upper surface of one corner of the mattress M. The second support pillar 13 engages the second upper engagement portion 13a with the upper surface of one corner of the mattress M. The third support pillar 14 engages the third upper engagement portion 14a with the upper surface of one corner of the mattress M. The fourth support pillar 15 engages the fourth upper engagement portion 15a with the upper surface of one corner of the mattress M (see FIG. 1). Furthermore, the first lower engagement portion 23, the second lower engagement portion 24, the third lower engagement portion 25, and the fourth lower engagement portion 26 are inserted between the lower surface of each corner of the mattress M and the placement surface of the bed body B.

[0044] As shown in Figure 6, in the bed guard 11 in which the first support pillar 12, the second support pillar 13, the third support pillar 14, and the fourth support pillar 15 are arranged at the corners of the mattress M, the four annular lower frames 17 come into contact with the four sides of the mattress M. In other words, the bed guard 11 sandwiches the mattress M between the four lower frames 17 from the left and right and the front and back directions. As a result, the four lower frames 17 restrict the left and right and front and back movement of the bed guard 11 relative to the mattress M.

[0045] As shown in Figure 4, the first support column connecting member 19 is adjusted so that the distance between the first lower engagement portion 23 and the first upper engagement portion 12a is less than the thickness t of the mattress M. The second support column connecting member 20 is adjusted so that the distance between the second lower engagement portion 24 and the second upper engagement portion 13a is less than the thickness t of the mattress M. The third support column connecting member 21 is adjusted so that the distance between the third lower engagement portion 25 and the third upper engagement portion 14a is less than the thickness t of the mattress M. The fourth support column connecting member 22 is adjusted so that the distance between the fourth lower engagement portion 26 and the fourth upper engagement portion 15a is less than the thickness t of the mattress M.

[0046] In the bed guard 11 placed on the upper surface of the mattress M, the four upper engagement portions 12a, 13a, 14a, 15a and the four lower engagement portions 23, 24, 25, 26 come into contact with the upper and lower surfaces of the four corners of the mattress M. In other words, the bed guard 11 sandwiches the mattress M from above and below with the four upper engagement portions 12a, 13a, 14a, 15a and the four lower engagement portions 23, 24, 25, 26. The recesses of each upper engagement portion 12a, 13a, 14a, 15a engage with the upper surface of the mattress M and two side surfaces that form a corner of the mattress M. In addition, the lower engagement surfaces 23a, 24a, 25a, 26a of each lower engagement portion 23, 24, 25, 26 engage with the underside of the mattress M, and the first side engagement surfaces 23b, 24b, 25b, 26b and the second side engagement surfaces 23c, 24c, 25c, 26c engage with two side surfaces that form a corner of the mattress M. In this way, the four upper engagement portions 12a, 13a, 14a, 15a and the four lower engagement portions restrict movement of the bed guard 11 relative to the mattress M in the left-right, front-back, and up-down directions.

[0047] 1, the first lower engagement portion 23 and the third lower engagement portion 25 may be connected by a first lower engagement portion connecting member 27 between the underside of the mattress M and the support surface of the bed body B. The second lower engagement portion 24 and the fourth lower engagement portion 26 may be connected by a second lower engagement portion connecting member 28 between the underside of the mattress M and the support surface of the bed body B. As a result, the relative movement between the first lower engagement portion 23 and the third lower engagement portion 25 and their movement in the vertical direction relative to the mattress M are restricted by the first lower engagement portion connecting member 27. The relative movement between the second lower engagement portion 24 and the fourth lower engagement portion 26 and their movement in the vertical direction relative to the mattress M are restricted by the second lower engagement portion connecting member 28.

[0048] The position of the lower frame 17 of the bed guard 11 relative to the upper surface of the mattress M is determined by a first support column connecting member 19, a second support column connecting member 20, a third support column connecting member 21, and a fourth support column connecting member 22, which are engaged with the upper surface of the mattress M by their respective upper engagement portions 12a, 13a, 14a, and 15a. The lower frame 17 is located near the upper surface of the mattress M. In this embodiment, the bed guard 11 is provided on the mattress M so that the upper end of the lower frame 17 overlaps with the upper surface of the mattress M when viewed from the side of the mattress M.

[0049] In this way, by placing the support posts 12, 13, 14, and 15 on the top surface of the mattress M, the bed guard 11 can position the lower frame 17 near the top surface of the mattress M and on the side of the mattress M, regardless of the thickness t of the mattress M. In other words, the bed guard 11 can engage the lower frame 17 with the mattress M so as to minimize the overlap between the partition member 18 and the side of the mattress M when viewed from the side of the mattress M. Therefore, the bed guard 11 can be attached to the mattress M so that the gap between the mattress M and the partition member 18 is shallow. In addition, the four lower frames 17 located on the four sides of the bed guard 11 are engaged with the four side surfaces of the mattress M located on the four sides. Therefore, the four lower frames 17 of the bed guard 11 restrict movement of the bed guard 11 in four directions relative to the mattress M, that is, left-right and front-back. In other words, the four lower frames 17 of the bed guard 11 do not move away from the mattress M.

[0050] Furthermore, the bed guard 11 can sandwich a mattress M of any thickness between the upper engagement portions 12a, 13a, 14a, 15a and the lower engagement portions 23, 24, 25, 26. Therefore, the bed guard 11 restricts vertical movement relative to the mattress M by the upper engagement portions 12a, 13a, 14a, 15a and the lower engagement portions 23, 24, 25, 26. Furthermore, when the lower engagement portions 23, 24, 25, 26 are connected by the first lower engagement portion connecting member 27 and the second lower engagement portion connecting member 28, the bed guard restricts vertical movement relative to the mattress M. Therefore, the bed guard 11 is unlikely to move in the vertical, front-to-back, and left-to-right directions relative to the mattress M.

[0051] Furthermore, partition member 18 is supported by upper frame 16 and lower frame 17. Therefore, when an infant comes into contact with partition member 18, partition member 18 elastically deforms between upper frame 16 and lower frame 17. However, the lower end of partition member 18 is held in the vicinity of the upper surface of mattress M on which lower frame 17 is located, even if partition member 18 elastically deforms due to the infant rolling over, etc. This makes it possible to prevent a gap from occurring between mattress M and partition member 18, regardless of the thickness of mattress M, even if a portion of partition member 18 elastically deforms. This makes it possible to prevent a gap from occurring between mattress M and partition member 18, even if an infant comes into contact with it, regardless of the thickness of mattress M.

[0052] <First Modification of the Embodiment> A bed guard 11A, which is a modified example of the bed guard 11, will be described with reference to Fig. 7. Fig. 7 is a side view of the bed guard 11A having a door 29 in the modified example 1 of the embodiment of the present invention.

[0053] As shown in Fig. 7, the bed guard 11A has a door 29. The door 29 is provided at least one of between the first support post 12 and the second support post 13, between the second support post 13 and the third support post 14, between the third support post 14 and the fourth support post 15, and between the fourth support post 15 and the first support post 12. In this embodiment, the door 29 is provided between the first support post 12 and the second support post 13. The door 29 is composed of a frame body 29a and a door partition member 29b. The door 29 has the door partition member 29b attached to the frame body 29a.

[0054] The upper frame 16 connected to the first support column 12 and the second support column 13 is divided into an upper frame 16a connected to the first support column 12 and an upper frame 16b connected to the second support column 13. Partition members 18 are provided on each of the upper frame 16 and the lower frame 17. A door 29 is located between the upper frame 16a connected to the first support column 12 and the upper frame 16b connected to the second support column 13. The door 29 is supported by the upper frame 16b connected to the second support column 13 and the lower frame 17 via hinges 29c. The door 29 is configured to be able to open and close between the first support column 12 and the second support column 13.

[0055] The bed guard 11A configured in this manner is configured as an enclosure without an opening when viewed from the side of the mattress M, but the openable door 29 allows easy entry into the enclosure. This improves user convenience. An upper frame 16a and a lower frame 17 are connected to the first support pillar 12, and an upper frame 16b and a lower frame 17 are connected to the second support pillar 13. Therefore, the first support pillar 12 and the second support pillar 13 are prevented from wobbling relative to the mattress M by the upper frame 16 and the lower frame 17 connected to them, respectively. With this configuration, the bed guard 11A can prevent gaps from occurring between the mattress M and the partition member 18 even when the door 29 is provided.

[0056] <Modification 2 of the embodiment> A bed guard 11B, which is a modified example of the bed guard 11, will be described with reference to Fig. 8. Fig. 8 is a partially enlarged cross-sectional view of a support pillar of the bed guard 11B in the modified example 2 of the embodiment of the present invention.

[0057] The bed guard 11B can be used as a playpen that encloses a play area for babies and toddlers. The bed guard 11B further includes a raising member 30 connected to the lower surface of each of the upper engagement portions 12a, 13a, 14a, and 15a.

[0058] The raising member 30 is a member that stabilizes each of the support columns 12, 13, 14, and 15. When viewed in the axial direction of each of the support columns 12, 13, 14, and 15, the raising member 30 is configured to overlap each of the upper engagement portions 12a, 13a, 14a, and 15a. The raising member 30 is configured to be attachable to a recess in each of the support columns 12, 13, 14, and 15, which is surrounded by the lower surface of each of the upper engagement portions 12a, 13a, 14a, and 15a and the side surface of each of the support columns 12, 13, 14, and 15. The raising member 30 is shaped to fit into the recess, for example. When the raising member 30 is attached to the lower surface of each of the upper engagement portions 12a, 13a, 14a, and 15a, the height difference between the lower surface of the raising member 30 and the lower end of the lower frame 17 is configured to be within a predetermined range. Therefore, the raising member 30 can stabilize the posture of each of the support columns 12, 13, 14, and 15. The raising member 30 may have an anti-slip portion on its bottom surface.

[0059] <Modification 3 of the embodiment> A bed guard 11C, which is a modified example of the bed guard 11, will be described with reference to Fig. 9. Fig. 9 is a perspective view of the bed guard 11C in the modified example 3 of the embodiment of the present invention.

[0060] The bed guard 11C is configured by connecting four support posts 12, 13, 14, and 15, which are arranged at the four corners of the mattress M, with three upper frames 16 and four lower frames 17. The bed guard 11C surrounds three sides of the mattress M with partition members 18. In this embodiment, the bed guard 11C does not have the upper frame 16 or the partition member 18 on one longitudinal side of the mattress M. In other words, the bed guard 11C has an opening when viewed from the side of the mattress M. In addition, the bed guard 11C has four lower frames 17 that engage with the four side surfaces of the mattress M. Therefore, the bed guard 11C restricts movement of the mattress M in the left-right, front-back, and up-down directions.

[0061] <Other embodiments> In each of the above-described embodiments, the bed guards 11, 11A, and 11B are provided with a partition member 18 made of mesh fabric between the upper frame 16 and the lower frame 17. However, the partition member may be made of any flexible fabric.

[0062] In each of the above-described embodiments, the bed guards 11, 11A, and 11B are connected to the respective columns 12, 13, 14, and 15 by the first column connecting member 19, the second column connecting member 20, the third column connecting member 21, and the fourth column connecting member 22, respectively, at the first lower engagement portion 23, the second lower engagement portion 24, the third lower engagement portion 25, and the fourth lower engagement portion 26. However, the first column connecting member 19, the second column connecting member 20, the third column connecting member 21, and the fourth column connecting member 22 may be configured to be separable from the respective columns 12, 13, 14, and 15. This allows the bed guards 11, 11A, and 11B to be removed from the mattress M with the first lower engagement portion 23, the second lower engagement portion 24, the third lower engagement portion 25, and the fourth lower engagement portion 26 engaged with the underside of the mattress M.

[0063] In each of the above-described embodiments, the first lower engagement portion 23, the second lower engagement portion 24, the third lower engagement portion 25, and the fourth lower engagement portion 26 of the bed guards 11, 11A, and 11B are inserted between the support surface of the bed body B and the mattress M. Each of the lower engagement portions 23, 24, 25, and 26 may have an uneven portion or the like that increases the frictional force against the mattress M.

[0064] In the modification of the second embodiment described above, the door 29 is configured to be openable and closable at any time. However, the door may have a locking mechanism. The locking mechanism is configured, for example, by a button, a slide, or a latch. In the bed guard, the locking mechanism can prevent an infant from opening the door.

[0065] In the bed guards 11, 11A, and 11B of the above-described embodiments, the upper frame 16 and the lower frame 17 are configured so that they can be assembled by the user to the respective support posts 12, 13, 14, and 15. The partition member 18 is configured so that it can be assembled by the user to the upper frame 16 and the lower frame 17. The upper frame 16 and the lower frame 17 may also be configured so that their lengths can be changed to suit the size of the mattress M.

[0066] Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiments, and it is possible to appropriately modify the above-described embodiments within the scope of the spirit of the present invention. [Explanation of symbols]

[0067] 11, 11A, 11B, 11C Bed guard 12 1st pillar 12a First upper engagement part 13 Second pillar 13a second upper engagement portion 14 Third pillar 14a Third upper engagement portion 15 Fourth pillar 15a 4th upper engagement part 16, 16a, 16b Upper frame 17 Lower frame 18 Partition material 19 First support column connecting member 20 Second support column connecting member 21 Third support column connecting member 22 Fourth support column connecting member 23 1st lower engagement part 24 Second lower engagement part 25 Third lower engagement part 26 4th lower engagement part 27 First lower engagement portion connecting member 28 Second lower engagement portion connecting member 29 Door 29a Frame 29b Door partition member 29c Hinge B Bed body M mattress

Claims

1. At least four support columns extending in the vertical direction; At least four upper frames respectively connected to upper ends of adjacent columns; At least four lower frames respectively connected to lower ends of adjacent columns; A bed guard comprising: a partition member supported by the upper frame and the lower frame; and the bed guard being attached to a mattress of a bed; The four pillars are: Each of the mattresses has an upper engagement portion that is engaged with the upper surface of the mattress so that the lower frame and the side surface of the mattress overlap when viewed from the side of the mattress, connected to at least four of the upper frames and at least four of the lower frames so as to be positioned at the corners of the mattress, The at least four lower frames include: The support is configured in a circular shape via the at least four support columns and contacts each of the four sides of the mattress. Bed guard.

2. The bed guard according to claim 1, A lower engagement portion that engages with the lower surface of the mattress; a support column connecting member that connects the lower end of the support column and the lower engagement portion and moves the lower engagement portion in the up and down direction relative to the support column, The support column connecting member is The distance between the upper engagement portion and the lower engagement portion is adjusted so that the mattress is sandwiched between the upper engagement portion and the lower engagement portion. Bed guard.

3. The bed guard according to claim 2, The support column connecting member is configured to separate from the support post; Bed guard.

4. In the bed guard according to claim 2, a lower engagement portion connecting member that connects the lower engagement portions to each other; The lower engagement portion connecting member is The lower engagement portions located on the diagonal lines of the mattress are connected in a state of engaging with the lower surface of the mattress. Bed guard.

5. The bed guard according to claim 1, Of the four pillars, a part of the upper frame, the lower frame and the partition member located between adjacent pillars are configured as a door. Bed guard.

6. The bed guard according to claim 1, The upper engaging portion further includes a raising member connected to a lower surface of the upper engaging portion, The raising member is The difference between the lower surface of the raising member connected to the lower surface of the upper engagement portion and the lower end of the lower frame is configured to fall within a predetermined range. Bed guard.

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