JP4884728B2 - mattress - Google Patents

Description

  The present invention relates to a mattress used for a core material of a bed, and more particularly to a mattress suitable for use in a hospital or the like.

  When using this type of mattress, when the user goes to sleep in a lying position such as lying or lying on his / her back, the load applied to the mattress from the user's shoulder, pelvis, etc. Therefore, it is desirable to distribute the body pressure appropriately so that the entire body of the user is supported under a uniform body pressure. In order to cope with such a request, for example, mattresses having configurations as disclosed in Patent Document 1, Patent Document 2, and Patent Document 3 have been proposed.

  In the mattress described in Patent Document 1, a plurality of corrugated protrusions extending in the width direction are formed on the surface of a base made of a flexible foam at a predetermined arrangement pitch in the length direction. The cross-sectional shape of each corrugated protrusion is formed so as to form a mushroom shape including a shaft portion and an umbrella portion.

  Moreover, in the mattress described in Patent Document 2, a first cushion body is formed at least in a portion corresponding to the user's waist, and a second cushion body is formed integrally with the first cushion body. Yes. The first cushion main body is formed to have a continuous concave and convex shape having a square shape on both upper and lower surfaces, and the second cushion main body is formed to have a concave and convex shape having a continuous waveform on both upper and lower surfaces.

Furthermore, in the mattress described in Patent Document 3, a rectangular support section corresponding to the user's head, chest, waist, and legs is formed by a plurality of grooves whose surface extends in the width direction and the length direction. It is divided. And these support area parts are set so that it may have an area proportional to the weight ratio of each part of a user. In addition, a portion corresponding to the user's waist in the length direction of the base or a central portion in the length direction including the portion is formed to be thicker than the other portions.
JP 2003-289997 A JP-A-8-281667 JP 11-318646 A

However, these conventional mattresses have the following problems.
That is, in the mattress of Patent Document 1, the corrugated protrusions having a cross-sectional mushroom shape are formed at a constant arrangement pitch, and therefore, different body pressures corresponding to each part of the user's body are appropriately dispersed and supported. I can't. That is, in a portion where high body pressure is applied, the corrugated protrusion collapses or collapses, and the entire body of the user cannot be supported in a uniform body pressure dispersion state. Further, since the corrugated projection has a mushroom cross section, the base portion (shaft portion) is thin, and the upper end portion (umbrella portion) is spaced apart from other corrugated projections adjacent to the upper side. spread. For this reason, the corrugated protrusions are not only crushed as described above with respect to the load from above and from the side, but also deformed in an unstable manner so that the umbrella part falls down and the umbrella part overlaps vertically. In addition to not being able to obtain a satisfactory body pressure dispersion state, the feeling during use was not good.

  Further, in the mattress of Patent Document 2, a first cushion body having a continuous concavo-convex shape on both the upper and lower surfaces is formed in a portion corresponding to the user's waist, and the hardness of the portion is higher than that of other portions. It is configured to be high. For this reason, a certain amount of body pressure distribution function can be exhibited corresponding to the user's waist and other parts, but the body pressure is effectively distributed finely according to the entire user's body. I could not support it. Moreover, since the mattress of Patent Document 2 has substantially the same width of the unevenness, the mattress is unnecessarily experienced during use, and the usability is extremely inferior.

  Furthermore, in the mattress of Patent Document 3, a portion corresponding to the user's waist in the length direction of the base, or a central portion in the length direction including the portion is formed to be thicker than the other portions, The hardness of the part is comprised so that it may become substantially higher than another part. For this reason, in the manufacturing process of a mattress, it is necessary to perform a process for changing the thickness of the substrate, and the manufacturing becomes complicated. In addition, because the center part of the base is formed to be thicker by a certain amount, the user's waist is in a raised state, especially in obese-type users and users with poor waist conditions. It is easy to put a burden.

  Moreover, this type of mattress is desired to be able to stand by bending the upper body side from the middle part in the length direction so that the user can raise only the upper body. If the central portion is formed thick like this, there is a disadvantage that the bending is not performed smoothly or a large force is required for the bending.

  The present invention has been made paying attention to such problems existing in the prior art. An object of the present invention is to provide a mattress that can appropriately distribute the body pressure of each part of the user's body and can comfortably support the entire body of the user.

In order to achieve the above object, according to the present invention, a plurality of grooves extending in the width direction are arranged along the length direction on the surface of the base made of a resin foam having a uniform thickness in the length direction and the width direction. A mattress is formed by changing and setting the depth and the arrangement pitch of the plurality of grooves, thereby forming a plurality of zones having different hardnesses in the length direction, and at the width end portion in the length direction intermediate portion of the substrate surface. On the other hand, a sheet that is less likely to extend than the base is pasted so as to straddle the plurality of grooves positioned at the width end portion .

Therefore, a plurality of zones having appropriate hardness corresponding to the body pressure of each part of the user's body in the length direction of the base body are formed by a simple process of changing and setting the depth and arrangement pitch of the plurality of grooves. Can do. Therefore, when the user goes to sleep such as lying down or lying on his back, the body pressure can be appropriately distributed for each part of the user's body, and the entire body of the user is supported in a uniform body pressure distribution state. can do.
In addition, by sticking a sheet that is less likely to extend than the base to the width end portion at the intermediate portion in the longitudinal direction of the base, even if the base has high flexibility and low hardness, a user or an attendant can sit down. In such a case, it is possible to prevent the user or attendant from falling down without being able to hold the upper body.

  In the above structure, two substrates having different hardnesses may be laminated and fixed. When configured in this way, it can be selected and used so that one of the bases is on the upper surface side as necessary. For example, according to the recovery situation of the patient in the surgical ward, the entire mattress can be used. The surface hardness can be changed.

  Further, in the above structure, it is preferable to use a substrate that has been subjected to a film removal treatment. When configured in this manner, air permeability during use can be ensured, and drainage during washing can be improved.

  In addition, in the above-described configuration, it is preferable that the groove pitch is set narrow in the zones corresponding to the user's shoulder and pelvis, and the zone is formed to be more flexible than the other zones. When configured in this manner, the zone corresponding to the user's shoulder and pelvis becomes more flexible than the other zones, particularly when the user goes to bed in a lying position, The body pressure in the pelvis can be effectively dispersed.

  In addition, a shallow groove may be formed in a zone corresponding to the user's shoulder and pelvis, and the zone may be formed to be more flexible than other zones. If comprised in this way, a softness | flexibility can be provided further with respect to the zone corresponding to a shoulder part and a pelvis part.

  And the groove | channel opened to an outer peripheral end surface can also be formed in the joint surface with the other base | substrate in at least one base | substrate. If comprised in this way, air permeability and drainage can be improved further, it is excellent in sleeping comfort, and the efficiency of washing | cleaning can be improved.

Further, the surface of the substrate, arranged along a plurality of longitudinal grooves extending in the longitudinal direction in the width direction, the widthwise end portion of the substrate, to form a wide range from the array pitch of the longitudinal groove flat portion, the width direction The hardness of the end portion can also be made higher than the central portion in the width direction . If comprised in this way, when handling this mattress in washing | cleaning etc., the width | variety edge part of a mattress can be stably hold | gripped and a mattress can be handled easily.

  As described above, according to the present invention, the body pressure of each part of the user's body can be appropriately dispersed, and the entire body of the user can be comfortably supported in a uniform body pressure dispersion state. Exhibits an excellent effect.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, the mattress 11 according to this embodiment is formed by bonding two substrates 12 and 13 made of resin foam such as polyurethane foam having different hardness and subjected to cell film removal treatment. It is constructed by laminating and fixing. That is, both the base bodies 12 and 13 are bonded and fixed via adhesives attached to the joint surfaces 12a and 13a of either one of the base bodies 12 and 13 in the form of dots. Each of the base bodies 12 and 13 has a uniform thickness in the length direction and the width direction, and is formed so that the thickness of the first base body 12 is larger than the thickness of the second base body 13. Further, the hardness of the first base 12 is configured to be lower than the hardness of the second base 13, and thus the first base 12 is formed more flexibly than the second base 13. In this embodiment, the hardness of the first base 12 is in the range of 50 to 200 N (Newton), and the hardness of the second base 13 is in the range of 150 to 350 N. These hardnesses conform to JIS K 6400-2: 2004.

Although not shown, the mattress 11 is accommodated in a bag-like cover and used as a bed mat.
As shown in FIGS. 3 to 5, a plurality of lateral grooves 14 extending in the width direction are formed on the surface (the upper surface in FIG. 3) 12b opposite to the bonding surface 12a of the first base 12 as shown in FIG. Are formed at a required arrangement pitch along the length direction. A plurality of vertical grooves 15 extending in the length direction are formed at a required arrangement pitch along the width direction on the surface 12 b of the first base 12 so as to intersect with the horizontal grooves 14. As shown in FIG. 4, on the surface (the upper surface in FIG. 3) 13b opposite to the joint surface 13a of the second base 13, a plurality of lateral grooves 16 extending in the width direction are lengthened as shown in FIG. It is formed at a required arrangement pitch along the direction.

  The depth and arrangement pitch of the lateral grooves 14 and 16 on both the bases 12 and 13 are set appropriately, and a plurality of zones Z1, Z2, Z3, Z4, Z5 having different hardnesses in the length direction of the mattress 11 are set. , Z6 are formed. In this case, as shown in FIG. 7, the zones Z1 to Z5 correspond to the head, shoulder, chest, waist (lumbar vertebra), and pelvis, respectively, of the user M, and the central portion of the mattress 11 in the length direction. Each pair is symmetrically disposed across the zone Z6. Thereby, any end in the length direction of the mattress 11 can be used as the head side of the user M.

  That is, as shown in FIGS. 3, 5, and 6, in particular in the zones Z <b> 2, Z <b> 3, and Z <b> 5 corresponding to the shoulder, chest, and pelvis of the user M, the predetermined arrangement pitch on each of the base bodies 12 and 13. The shallow grooves 14b and 16b are formed between the deep grooves 14a and 16a, and the arrangement pitch of the grooves 14 and 16 is narrowed. Accordingly, when the user M shoulders, chest, and pelvis, that is, lying down, the zones Z2, Z3, and Z5 corresponding to the protruding portions of the body are more flexible than the other zones Z1, Z4, and Z6. It is designed to be taller so that it can easily allow the body to protrude. In the zone Z3 corresponding to the chest of the user M, the depth of the shallow lateral groove 14b on the first base 12 is slightly shallower than that of the zone Z2 corresponding to the shoulder, and the zone Z3 corresponding to the chest is located in the zone Z3. The flexibility is formed to be slightly lower than the flexibility of the zone Z2 corresponding to the shoulder. Further, the deep lateral grooves 14a, 16a are formed such that the opening side toward the upper side or the lower side is narrow and the back side is slightly wider than that.

  Further, as shown in FIG. 1 and FIG. 4, by appropriately setting the arrangement pitch of the vertical grooves 15 on the first base 12, the hardness of the mattress 11 at both end portions and the central portion is different. It is configured. That is, as shown in FIGS. 1 and 4, flat portions 12 c having no grooves wider than the arrangement pitch of the vertical grooves 15 are formed at both ends in the width direction of the first base 12. It is comprised so that the hardness of both ends may become higher than a center part.

  In addition, as shown in FIGS. 1, 2 and 4, at the center portion in the length direction of the mattress 11, both end portions in the width direction of the upper surface of the first base 12 are made of a resin film, a resin sheet, or a nonwoven fabric. Thus, a covering 17 having a higher hardness than the first base 12 and hard to extend from the first base 12 is stuck, and the hardness of the same portion of the first base 12 is increased. Thereby, when the user M or a caretaker sits on both ends in the width direction of the mattress 11 or when the user M enters and exits from the mattress 11, the sinking is largely suppressed. It has become.

  As shown in FIG. 3 to FIG. 6, a plurality of shallow first ventilation grooves 18 extending in the width direction and opening in the outer peripheral end surface are formed along the length direction on the joint surface 12 a of the first base 12. It is formed with a required arrangement pitch. A plurality of deep second ventilation grooves 19 extending in the length direction on the joint surface 12a of the first base 12 and extending to the outer peripheral end face extend along the width direction so as to intersect the first ventilation grooves 18. Are formed at a required arrangement pitch. On the joint surface 13a of the second base 13, a plurality of shallow ventilation grooves 20 and a plurality of lateral holes 21 that extend in the width direction and open to the outer peripheral end face have a predetermined arrangement pitch along the length direction. It is formed with. The ventilation grooves 18, 19, 20 and the ventilation holes 21 ensure the air permeability when the mattress 11 is used and the drainability when the mattress 11 is washed.

Next, the operation of the mattress 11 configured as described above will be described.
When the mattress 11 is used, the mattress 11 may be selected and used so that one of the bases 12 and 13 having different hardness is on the upper surface side. it can. For example, when a surgical patient such as a fracture is used, the affected part of the patient can be protected by laying and using the first base 12 having low hardness on the upper surface side immediately after the start of treatment. In addition, if the second base 13 having high hardness is laid so as to be on the upper surface side according to the recovery situation, the sinking of the body will be reduced, the body will be in a stretched state, and it will be easier to roll over, The recovery effect can be promoted.

  As shown in FIG. 7, when the user M goes to bed on the mattress 11 in a posture such as lying down or lying on the back, the body pressure of the user M's head, shoulders, chest, waist, and pelvis is increased. Acting on the substrates 12 and 13 arranged in In this case, by appropriately setting the depth and arrangement pitch of the plurality of lateral grooves 14 and 16 formed on the surfaces 12 b and 13 b of the base bodies 12 and 13, A plurality of zones Z1 to Z6 having hardness according to body pressure are formed. For this reason, the body pressure of each part of the user's M body is appropriately dispersed in each of the zones Z1 to Z6, and the entire body of the user M can be supported in a substantially uniform body pressure dispersion state.

  In particular, in the zones Z2 and Z5 corresponding to the shoulder portion and pelvis portion of the user M, the arrangement pitch of the lateral grooves 14 and 16 is set to be narrow, and the flexibility of these zones Z2 and Z5 is set to other zones. It is formed to be higher than the flexibility. For this reason, when the user M sleeps in a lying posture, the body pressure in the shoulder and pelvis of the user M can be dispersed in the same manner as the chest and buttocks, and the repulsive force applied to the shoulder and pelvis And can sleep comfortably.

  Further, in the mattress 11, the bases 12 and 13 are formed from a resin foam subjected to cell film removal treatment, and the mating surfaces 11 are open to the joint surfaces 12a and 13a of the bases 12 and 13, respectively. A plurality of ventilation grooves 18, 19, 20 and ventilation holes 21 are formed. For this reason, when the mattress 11 is used, an appropriate air permeability can be ensured, and the user can sleep comfortably, and when the mattress 11 is washed, a good drainage can be exhibited, and the time can be reduced. Cleaning and drying can be completed.

  Further, in this mattress 11, zones Z1 to Z5 having different hardness corresponding to each part of the body of the user M, that is, flexibility, are arranged symmetrically in pairs with the zone Z6 in the central portion in the length direction. Has been. For this reason, the use direction of the mattress 11 is not limited, and any end portion in the length direction can be used as the head side of the user M, which is convenient in handling.

The effects of this embodiment described above are listed as follows.
-Since the mattress 11 is formed by laminating and fixing the first and second base bodies 12 and 13 having different hardnesses, either one can be appropriately selected according to the state of the body and the like to be comfortable. Can be used for

  A plurality having appropriate hardness according to the body pressure of each part of the body of the user M by appropriately setting the depth and the arrangement pitch of the plurality of lateral grooves 14 and 16 formed on the surfaces 12b and 13b of the base bodies 12 and 13 Since the zones Z1 to Z6 are formed, the body pressure of each part of the body of the user M is supported in a substantially uniform dispersed state, and it is easy to turn over and can be used comfortably as described above.

  ・ In particular, because the deep grooves and shallow grooves are combined as the lateral grooves 14 and 16, the hardness of each zone Z1 to Z6 can be set in small increments, and a comfortable mattress 11 having an excellent feeling of use can be obtained with a good feel. be able to.

  ・ Unlike Patent Documents 1 to 3, the mushroom-shaped protrusions, irregularities having a large-width recess, and the thickness of the base are not different, so that the body is stabilized. It can be supported without difficulty with a good feel.

  Each base 12, 13 is formed from a resin foam that has undergone cell film removal treatment, and a plurality of ventilation grooves 18, 19, 20 and ventilation holes 21 are formed in the joint surfaces 12 a, 13 a of each base 12, 13. Therefore, moderate air permeability and drainage can be ensured, and it can contribute to comfortable sleeping and short-time washing.

  -The zones Z1 to Z5 having different hardnesses are symmetrically arranged one by one across the central zone Z6 in the length direction, so that any end portion of the mattress 11 in the length direction is the head side. It can be used and is easy to use.

  As shown by a two-dot chain line in FIG. 7, when the upper body side of the user M is erected by bending the mattress 11 at the middle part in the length direction and supporting the upper body of the user M, Since the entire mattress 11 has a uniform thickness, the bending can be smoothly performed with a small force. Therefore, when the mattress 11 is bent by a motor drive, a motor with a small power can be used.

  -Since the covering body 17 that is harder than the first base body 12 and hard to extend is attached to both width ends of the intermediate portion in the longitudinal direction of the first base body 12, the first base body 12 has a low hardness, Even if it is flexible, it is possible to prevent the user M or the like from sinking greatly when the user M or an attendant sits down or when the user M enters or leaves the mattress 11. Therefore, it is possible to prevent the user M or an attendant from falling without being able to hold the upper body.

  -Flat portions 12c are formed at both end portions in the width direction of the mattress 11 so that both end portions in the width direction of the mattress 11 are higher in hardness than the center portion, and the hardness of both end portions in the width direction of the mattress 11 is the center. Therefore, when the mattress 11 is handled during cleaning or the like, the width end portion of the mattress 11 can be stably held. Therefore, the mattress 11 can be easily handled in cleaning or the like.

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
(1) As shown in FIG. 8, flat zones Z0 wider than the arrangement pitch of the lateral grooves 14a having no lateral grooves 14a are formed at both ends in the length direction of at least one of the first and second base bodies 12 and 13. Then, regions of higher hardness than other portions are formed at both ends of the mattress 11 in the vertical direction. If it does in this way, the both ends of the length direction of mattress 11 can be grasped stably, and handling of mattress 11 can be easily performed in washing etc.

  (2) The arrangement pitch of the vertical grooves 15 at both ends in the width direction of the mattress 11 is set to be higher than the arrangement pitch of the vertical grooves 15 at the center so that both ends in the width direction of the mattress 11 have higher hardness than the center. A widened configuration is provided on both the first and second bases 12 and 13 or only on the second base 13.

(3) The two bases 12 and 13 are constituted by one base having a predetermined thickness without being laminated and fixed.
(4) The vertical grooves 15 on the surface 12b of the first base 12 are omitted.

  (5) Forming a plurality of vertical grooves extending in the direction intersecting the horizontal grooves 16 on the surface 13 b of the second base 13.

The top view which shows the mattress of one Embodiment. The bottom view of the mattress of FIG. The expanded sectional view in the 3-3 line of FIG. FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. The side view which shows one base | substrate in the mattress of FIG. The side view which similarly shows the other base | substrate. The side view which shows the use condition of the mattress of FIG. The expanded sectional view which shows a modification.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Mattress, 12 ... 1st base | substrate, 12a ... Joining surface, 12b ... Surface, 12c ... Flat part, 13 ... 2nd base | substrate, 13a ... Joining surface, 13b ... Surface, 14 ... Horizontal groove, 15 ... Vertical groove, 16 ... Cross groove, M ... user, Z1-Z6 ... zone.

Claims (7)

A mattress in which a plurality of grooves extending in the width direction are arranged along the length direction on the surface of the base made of a resin foam having a uniform thickness in the length direction and the width direction,
By changing and setting the depth and arrangement pitch of the plurality of grooves according to the site in the length direction, to form a plurality of zones with different hardness in the length direction ,
A sheet that is less likely to extend than the base is attached to the width end portion in the lengthwise intermediate portion of the substrate surface so as to straddle the plurality of grooves positioned at the width end portion. Mattress to do. The mattress according to claim 1, wherein two substrates having different hardnesses are laminated and fixed. The mattress according to claim 2 , wherein a groove that opens to an outer peripheral end surface is formed on a joint surface of at least one of the substrates with the other substrate. The mattress according to any one of claims 1 to 3, wherein a substrate on which a film removal treatment of the cell has been performed is used. The slot corresponding to the shoulder portion and pelvis portion of the user is set to have a narrow groove pitch, and the zone is formed to be more flexible than the other zones. 5. The mattress according to any one of 4 . The mattress according to claim 5 , wherein a shallow groove is formed in a zone corresponding to a shoulder portion and a pelvis portion of the user, and the zone is formed so as to be more flexible than the other zones. A plurality of longitudinal grooves extending in the length direction are arranged on the surface of the base body along the width direction,
The widthwise end portion of said base, said broad than the arrangement pitch of the longitudinal grooves to form a flat portion, of claim 1 to 6, characterized in that the hardness of the end portion in the width direction was higher than the widthwise central portion The mattress as described in any one of them.

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