JP2019118675A - Sheet - Google Patents

Abstract

To provide a sheet capable of detecting with high-sensitivity the posture change of a bedded person while suppressing relative positional deviation between a state detection sheet and a sheet covering body.SOLUTION: A sheet 10 which is arranged so as to cover at least a top face of an elastically deformable cushioning material such as a mattress 4 provided on a bed 1 comprises: a state detection sheet 14 in which a state detection member 20 expanding and contracting integrally with a sheet body 11 with elasticity, and converting change in an expansion and contraction state of the sheet body 11 into change in electrical characteristics is arranged in a partial area of the sheet body 11; and a sheet covering body 15 which is overlappedly arranged on the state detection sheet 14, and extends with the extension of the sheet body 11. A restraint area BA for restraining mutually so as not to cause deviation of a relative position between the sheet covering body 15 and the state detection sheet 14, and a non-restraint area NBA for allowing deviation of the relative position are defined, and the state detection member 20 is arranged in the non-restraint area NBA.SELECTED DRAWING: Figure 1

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a bed for detecting the movement of a person to be protected who is in bed, a sofa, a chair or the like, for example, a bed arranged to cover the upper surface of a cushioning material.

  A protected person such as an elderly person gets out of a house or a facility without hesitation as a family or a guardian (hereinafter referred to as "the guardian etc.") notices it and finds out whereabouts become unknown or encounters an accident Social problems such as In hospitals and nursing facilities, it is required not only to detect bedsores of a protected person and to prevent bedsores but also to prevent accidents such as falls and beds from the bed of the protected person.

  For this purpose, a pressure-sensitive mat is disposed at the end adjacent to the bed, and when the leaving of the protected person is detected by the output of the pressure-sensitive mat, a system in which a notification is sent to a guardian or the like has been commercialized.

  Patent Document 1 discloses a flexible acceleration sensor for detecting body movement such as heartbeat and respiration of a person in the floor, a cushion material for holding the acceleration sensor, and a signal terminal unit for extracting an output signal of the acceleration sensor. And a body motion detection device having a quilted pad which covers the acceleration sensor and the cushion material with a cloth and is sewn around the acceleration sensor.

  According to the body movement detection device, the position of the acceleration sensor does not shift even for large body movement such as turning over on the bedding of a person on the floor or movement of the limbs, eliminating variations in the output of the acceleration sensor It is described that it is possible to obtain a feeling of sleeping that does not make the sensor arrangement feel as well as possible.

Patent No. 3596175 gazette

  By the way, in order to detect a change in posture of a person in the floor, a state detection member that extends and contracts integrally with the stretchable cloth main body and converts a change in the stretch state of the cloth main body into a change in electrical characteristics is a part of the cloth main body. In the case of using a state detection bed like the one arranged in the area, the following problems occur when the bed covering is placed on the state detection bed in order to prevent the state detection bed from being soiled.

  The position detection cloth and the cloth covering are relatively displaced due to the operation such as turning over of the person who is the person to be protected, and if the positional deviation becomes large, the cloth covering interferes with the expansion and contraction movement of the cloth main body. The problem is that it is not possible to accurately detect the change in load on the bed caused by the change in posture of the floor, and the problem is that the sleeping comfort becomes worse due to the uneven lump covering.

  If quilting as described in the above-mentioned patent documents is performed in a state in which the state detection cloth and the cloth covering are overlapped and disposed to cope with such a problem, the expansion property of the cloth main body is deteriorated, and the existing as described above There is a problem that it is not possible to accurately detect the change in posture of the floor.

  The same problem has arisen not only in the bed described above, but also in detecting the behavior of a person who is entrusted with a sofa or chair.

  SUMMARY OF THE INVENTION In view of the above-described problems, an object of the present invention is to provide a cloth which can detect a posture change of a person on the floor with high sensitivity while suppressing relative positional deviation between a state detection cloth and a cloth covering. It is on the point.

  In order to achieve the above-mentioned object, according to a first feature of the lining according to the present invention, as described in claim 1 of the document of the claims, the lining body is integrally expanded and contracted with the elastic covering main body. A state detection member for converting a change in the expansion / contraction state into a change in electrical characteristics is disposed on a part of the area of the bed main body, and the state detection bed is overlapped with the state detection bed. A covering area covering the covering cloth and the state detection covering, and a non-restricting area for dividing the relative positional deviation, and a non-restricting area The point is that the state detection member is disposed in the non-restraint area.

  By arranging the state detection member in the non-restraint area that allows the relative position shift between the cover covering and the state detection cover, the cover main body expands and contracts in accordance with the movement of the person to be protected, and the unit integrally expands and contracts with the cover main body The movement of the protected person is detected with high accuracy as a change in the electrical characteristics by the state detection member. At this time, since the cloth covering is freely expanded along with the expansion of the cloth main body, the expansion and contraction behavior of the state detection cloth is not disturbed. On the other hand, since the relative position between the cloth covering and the state detection cloth is mutually restrained so that the relative positions of the cloth covering and the state detection cloth do not shift, the cloth covering is largely unevenly distributed with respect to the state detection cloth even if the person turns over As a result, the bed cover does not sag or wrinkle, and the sleeping comfort does not deteriorate.

  According to a second feature of the invention, as described in the second aspect, in addition to the first feature described above, the non-restraint area is surrounded by the restraining area.

  Since the constraint area is arranged to surround the non-constraint area, large ubiquity of the cloth cover with respect to the state detection cloth is effectively avoided.

  According to the third feature, as described in the third aspect, in addition to the first or second feature described above, the lining covering and the state detection lining are separated by a predetermined distance on the joining surface. The point is that the restraint area is formed by sewing or bonding.

  Sewing or bonding can be suitably used as a restraining means, and restraining the two by such means does not give rise to unnatural irregularities on the bed, and therefore does not give discomfort to the skin surface of the sleeping person .

  According to a fourth feature of the present invention, in addition to any one of the first to third features described above, the bed is disposed so as to cover at least the upper surface of the cushion material. The state detection member is a long side direction or a short side of the bed main body in a region located on the waist and / or the head of the person in a lying position in which the long axis of the body is along the long side of the cushion material. There is a point that it is composed of a plurality of strip members arranged in parallel in the direction and each connected in series electrically.

  No matter how the posture of the protected person changes on the bed, the load on the mattress corresponding to the waist on the mattress, which is a cushioning material that elastically deforms according to the movement of the protected person, is surely loaded until it leaves the bed Since the load applied to the area changes depending on the posture, the state detection member is provided in the area located at the waist and the change in the state is detected to accurately detect the change in posture of the person to be protected on the bed become able to. In particular, by arranging a plurality of state detection members composed of strip members in parallel in the long side direction or the short side direction of the cloth main body and electrically connecting each in series, any of the plurality of strip members Even if the part expands and contracts, the load received from the waist of the person to be protected can be properly detected. In addition, when the posture of the protected person on the bed changes from the prone position to the sitting position, the load on the head applied to the mattress changes significantly. Therefore, when the state detection member is disposed in a region of the bedding body located on the head of the protected person in a lying position, the posture determination unit can more accurately determine the posture of the protected person based on the change in the electrical characteristics. It will be.

  According to a fifth feature of the present invention, in addition to any of the first to fourth features described above, the state detection member is woven or joined integrally with the cloth main body, as described in claim 5; It is in the point comprised with the electroconductive expansion-contraction fabric from which an electrical resistance changes in correlation with the expansion-contraction state of the said cloth main body.

  Since the state detecting member is integrally woven or joined to the lining cloth body, when the posture of the person to be protected changes and the lining cloth body expands and contracts, the state detecting member expands and contracts with the lining cloth body, and the degree changes the electric resistance Will be detected as

  According to the sixth aspect, as described in the sixth aspect, in addition to the fifth aspect described above, in the conductive stretch fabric, the loop formed of the conductive yarn is contracted in the course direction. The loops are in contact with each other, and each loop is composed of a knitted fabric that can be separated in an extended state in the course direction.

  When the loops of the conductive yarn contact each other in the contracted state, the electrical resistance at both ends of the conductive yarn decreases, and in the stretched state, the loops of the conductive yarn separate from each other to increase the electrical resistance at both ends of the conductive yarn. Therefore, when the load of the occupant is applied, the electrical resistance at both ends of the conductive yarn is increased, and when the load is released, the electrical resistance at both ends of the conductive yarn is reduced, and the posture of the occupant on the bed is appropriate. Can be detected.

  As described above, according to the present invention, it is possible to provide a cloth which can detect a posture change of a person on the floor etc. with high sensitivity while suppressing relative positional deviation between the state detection cloth and the cloth covering. Came to be able to

(A) is an explanatory view of a state in which a bed according to the present invention is attached to a mattress which is a cushioning material on a bed, (b) is a plan view of the bed, (c) is a sectional view taken along line A-A of (b) (A) is a plan view explanatory view of a state detection member, (b) is an explanatory view of a conductive cloth and a connector for connecting state detection cloths in series, (c) is a state in which a signal line is connected to the connector An explanatory view, (d) is an explanatory view of a crimp terminal crimped to the end of the signal line Knitting structure chart of the knitted fabric to be the main body The knitting structure chart of the contracted state of the state detection member Knitting diagram of stretched state of the state detection member (A) is explanatory drawing of the cloth which shows another embodiment, (b) is explanatory drawing of the cloth which shows further another embodiment. (A) is an explanatory view of SCY usable for posture detection cloth, (b) is an explanatory view of DCY usable for posture detection cloth, (c) is an explanatory drawing of SCY in an extended state, (d) is covering Knitting chart of flat knitting using yarn Diagram of behavior judgment protection system

Hereinafter, an example of a cloth according to the present invention will be described based on the drawings.
As shown to Fig.1 (a), the bed 1 is provided in each room of the plant | facility which cares for the protected person H who suffered from dementia, for example. The bed 1 comprises four legs 2 and a frame 3 supported by the legs 2 and is a mattress 4 as an example of an elastically deformable cushioning material coated with the lining 10 according to the present invention on the frame 3 Is placed. A narrow band-like state detection member 20 is disposed on the cloth 10, and signal lines S 1 and S 2 connected to both ends of the state detection member 20 are connected to the measuring device 30.

As shown in FIGS. 1 (b) and 1 (c), the cloth 10 has a two-layer structure of a state detection cloth 14 and a cloth covering 15 disposed so as to overlap the state detection cloth 14.
The state detection bed 14 includes a bed body 11 having elasticity, and a state detection member 20 which is integrally extended with the bed body 11 and converts a change in the state of the bed body 11 into a change in electrical characteristics. The state detection member 20 is provided in a partial area of the cloth main body 11 and is integrally joined to the cloth main body 11 with the weaving or the cloth main body 11.

  Position shift occurs relatively between the state detection bed 14 and the bed covering 15 due to the operation such as turning over of the person who is the person to be protected, and when it becomes larger, the bed covering 15 inhibits the expansion and contraction of the bed main body 11 As a result, the change in load on the bed caused by the change in posture of the presenter can not be properly detected, or the sleeping comfort becomes worse due to the uneven lump covering 15.

  Therefore, a restraint area BA for mutually restraining the relative positions of the cloth covering 15 and the state detection cloth 14 so as not to be displaced, and a non-restriction area NBA for permitting displacement of the relative position are partitioned. A state detection member 20 is disposed.

  A restraint area BA is formed by sewing or bonding the cloth covering 11 and the state detection cloth 15 at predetermined intervals on the joint surface, and the restriction area BA is arranged to surround the non-restriction area NBA. ing.

  Sewing or adhesion can be suitably used as a restraining means for embodying the non-restraint area NBA. In FIG. 1 (b), an example in which the cloth cover 15 and the state detection cloth 14 are sewn in a lattice at predetermined intervals is shown, and a sewn part is indicated by reference numeral 16. A thin layer of cocoon may be provided between the bed covering 15 and the state detecting bed 14 to be sewed.

  In the case where the covering covering 15 and the state detecting covering 14 are subjected to adhesion processing, an adhesive made of a thermoplastic resin can be suitably used, and the adhesive is not applied in a plane, and is separated by a predetermined distance. It is preferable to apply | coat and bond to linear form or point form.

  As a thermoplastic resin to be an adhesive, for example, polyurethane-based hot melt resin, polyester-based hot melt resin, polyamide-based hot melt resin, EVA-based hot melt resin, polyolefin-based hot melt resin, styrene-based elastomer resin, moisture-curable urethane And hot melt resins, reactive hot melt resins and the like. Among them, reactive hot melt resins are particularly preferable in that they have high adhesive strength and can be adhered in a short time.

  Restraining both by such means does not cause unnatural unevenness on the floor cloth, and therefore does not give discomfort to the skin surface of the sleeping person. Further, the cloth covering 15 and the state detection cloth 14 can be integrally cleaned, and the time and effort for bed making can be greatly reduced.

  A knitted fabric or a woven fabric having stretchability is suitably used as the fabric constituting the cloth main body 11. Further, when the cloth main body 11 is stretched and urged by the load applied to the cloth main body 11, the cloth constituting the cloth cover 15 is stretched at least along with the expansion of the cloth main body 11 so as not to resist the biasing force. A knitted fabric or a fabric having the following characteristics is preferably used. Hereinafter, an example in which the cloth main body 11, the state detection member 20, and the cloth covering 15 are made of a knitted fabric will be described in detail, but it is needless to say that they may be made of a woven material.

  The knitted fabric to be the cloth main body 11 is a knitted fabric obtained by knitting a heat-deformable elastic yarn and other yarns by plating and heat-deforming the heat-deformable elastic yarn by heat setting. The edge is composed of a knitted fabric which can be treated in a straight line.

  If a knitted fabric subjected to such anti-break processing is employed, the fibers will not be disentangled from the end portion subjected to the release treatment even after repeated washing, and the appearance will not be deteriorated. In addition, since a conventional unfolding process such as, for example, folding and sewing an end portion is not necessary, a low-cost bed with high productivity can be realized.

  Plating knitting is also called filling knitting, and an existing knitting method can be adopted. For example, it is particularly preferable to use a knitting method in which a plurality of yarns are fed from different yarn feeders to knitting needles, because the arrangement of the yarns of the knitting loops is stably determined.

  FIG. 3 shows a knitting weave of plating. Plating knitted fabric in which the heat-deformable elastic yarn 12 and the other yarns 13 are fed from different yarn supplying ports to knitting needles is the heat-deformable elastic yarn 12 and the other yarns in each knitting loop. Since the arrangement of 13 is stable, thermally deformable elastic yarns can be made adjacent to all the loops, and if the thermally deformable elastic yarns are thermally deformed by heat setting processing etc., all the loops of the knitted fabric Will surely realize the anti-unlocking function.

  Specifically, in the present embodiment, a low melting point polyurethane elastic yarn is used as the heat-deformable elastic yarn 12, and mixed yarn of a cotton yarn and a polyester yarn is selected as the other yarn 13 and knitted by milling or smooth knitting. A knitted fabric is used. By heat-setting the knitted fabric, the low melting point polyurethane elastic yarn melts and fuses with one another to realize the anti-unwrapping function. By adjusting the ratio of cotton yarn and polyester yarn, a good touch fabric with appropriate moisture absorption and quick drying can be obtained. In this embodiment, 55% cotton, 30% polyester, and 15% polyurethane are set. .

  Besides using a heat-fusible elastic yarn such as a low melting point polyurethane elastic yarn as the heat-deformable elastic yarn, it is also possible to use a polyurethaneurea elastic fiber. Compressive deformation of the polyurethaneurea elastic fiber occurs at the contact point between the polyurethaneurea elastic fibers or between the polyurethaneurea elastic fiber and the opposing yarn by heat processing such as heat setting processing, and the partner to the polyurethaneurea elastic fibers or polyurethaneurea elastic fiber Since fixation of the yarn occurs, the polyurethaneurea elastic fiber and the opposing yarn are less likely to come out of the knitted fabric, and it is possible to obtain a knitted fabric in which curling and unraveling are suppressed. That is, as long as it is a heat-deformable elastic yarn having a characteristic such as melting or compression deformation due to heat treatment, it is not limited thereto.

  In addition, the knitted fabric to be the cloth main body 11 is not limited to the knitted fabric subjected to the above-described warp stop processing, and a polyurethane yarn is interwoven with the ground texture and can be stretched in two directions, the course direction and the wale direction. It should be the ground. Moreover, the knitted fabric may be stretchable in any of these two directions, in which case the state detection member 20 may be disposed along the stretchable direction.

  As shown in FIG. 2A, the state detection cloth 20 as the state detection member 20 is knitted in a flat, narrow band shape, and is provided with a conductive stretch cloth 21 disposed at the center in the width direction, and a conductive stretch. A non-conductive stretchable fabric 22 disposed on both sides of the fabric 21 is configured. In the present embodiment, the width of the conductive stretchable fabric 21 is set to about 2 mm, and the width of the non-conductive stretchable fabric 22 on both sides is set to about 3.5 mm, but the present invention is not limited to this value.

  The conductive stretchable fabric 21 and the non-conductive stretchable fabric 22 together form stretchability along the longitudinal direction, and warp and bend the fabric 20 in the front and back direction, bend to the left and right along the surface direction, and It has enough flexibility to allow twisting and so on. Note that the state detection cloth 20 may be configured of only the conductive stretch cloth 21 without the non-conductive stretch cloth 22.

  The non-conductive stretchable fabric 22 is a knitted fabric knitted only with non-conductive yarns such as synthetic fibers (for example, nylon, polyester), natural fibers or materials obtained by mixing them with elastic yarns. Is a knitted fabric knitted using a conductive yarn and an elastic yarn. In the present specification, the term "conductive yarn" refers to a bare material in which the metal component is exposed on the surface of the yarn, and the term "elastic yarn" refers to no load (no extension = normal) in which no tensile force is applied. A material which maintains a contracted state and freely expands in response to a tensile force when a tensile force is applied, and returns from the expanded state to the original contracted state when the tensile force is released.

  Metal that is coated with metal component by performing wet or dry coating, plating, vacuum film formation, other appropriate deposition method on this core using resin fiber, natural fiber, or metal wire as a core as conductive yarn It is preferred to use a coated wire (plated wire). Although a monofilament may be adopted for the core, a multifilament or a spun yarn is preferred to a monofilament. Furthermore, it is also possible to use stretchable fibers such as polyurethane fibers. Wooly textured yarn, covering yarn such as SCY and DCY, bulked textured yarn such as fluff textured yarn are more preferable.

  Examples of metal components to be deposited on the core include pure metals such as aluminum, nickel, copper, titanium, magnesium, tin, iron, silver, gold, platinum, vanadium, molybdenum, tungsten, cobalt, alloys thereof, stainless steel , Brass etc. can be used.

  As the elastic yarn, polyurethane or rubber-based elastomer material may be used alone, or polyurethane or rubber-based elastomer material may be used for the “core”, and covering yarn using nylon or polyester for the “cover” or the like. be able to. By adopting such covering yarn, functions such as hydrophilicity, water repellency, corrosion resistance, corrosion resistance, coloring and the like can be imparted. It is also useful for improving the feel and controlling the growth. In addition, it is also possible to use a yarn containing a conductive material as the elastic yarn.

  The knitting structure of the conductive stretch fabric 21 is illustrated in FIGS. 4 and 5. The conductive fabric 25 is knitted into a plain weave (also referred to as a plywood or a single, etc.) using the conductive yarn 25 so that the longitudinal direction of the beltlike fabric 20 to be a beltlike member is along the course direction. There is. In this example, one course of the elastic yarn 26 is inserted for each course of the conductive yarn 25, and the elastic yarn 26 is entangled in each loop of the conductive yarn 25 so as to be along the conductive yarn 25.

  The individual loops of the conductive yarn 25 are deformed by the elastic yarn 26 into a shape contracted in the course direction, and this deformed shape is maintained. Since the conductive yarn 25 is a conductive bare material, the larger the number of contact points by the loop, and the larger the contact area by being compressed in the course direction, the number of conductive contacts, ie, the number of conductive contacts. The area is large, the current path is short, and the electrical resistance between two points separated in the course direction is small.

  When the fabric is stretched, the loops of the conductive yarn 25 come to separate from each other against the tightening force of the elastic yarn 26. The separation behavior of the loops of the conductive yarn 25 at this time does not cause all the loops to separate at once, but maintains the contact state while the contact pressure gradually decreases in proportion to the degree of extension of the knitted fabric ( The contact area is smaller than that in the non-elongation state), the state in which the contact is released to gradually widen the gap, or the state in which the non-elongation contact state is maintained is mixed (FIG. 5). reference).

  Therefore, as the elongation starts from the non-elongation time and the elongation degree becomes larger, the conduction area decreases, the conduction path becomes longer, and the electric resistance tends to gradually increase. Naturally, when the stretching force applied to the fabric is released, the tension in the course direction by the elastic yarn 26 causes the loop of the conductive yarn 25 to contract in the course direction and restore the unstretched state, so the conduction area The electrical resistance decreases with the increase of

  4 and 5 illustrate a plain knitted fabric as the knitting structure of the conductive stretch fabric 21. However, a ground structure of the conductive yarn 25 is made of a rubber knit fabric (milling knitting), and the elastic yarn 26 is inlayed along the course direction. May be inserted into the

  That is, the conductive stretch fabric 21 is knitted with the conductive yarn 25 in which the loop is formed in the course direction and the elastic yarn 26 which is inserted in the course direction and each loop contacts in the contracted state and the loops can separate in the extended state. It is composed of a knitted fabric. In the present embodiment, an example in which the elastic yarn is inserted in the course direction has been described, but as described later, the conductive yarn itself may be an elastic yarn, in which case the elastic yarn may not be inserted. Good.

  The non-conductive stretchable fabric 22 is knitted in the same knitting structure as the conductive stretchable fabric 21 using insulating yarns such as synthetic fibers instead of the above-described conductive yarns 25.

  As shown in FIGS. 1 (b) and (c) and FIGS. 2 (b) to 2 (c), such a state detection cloth 20 is used as the subject H in the bed main body 11 that constitutes the state detection bed 14. In the region R1 located at the waist of the protected person H in a recumbent position with the long axis of the body along the long side of the mattress 4, in the short side direction of the cloth main body 11, plural T in this embodiment are horizontal T = A range including 85 cm from the end of the foot tip side of the rectangular footing main body 11 of 220 cm long and L = 120 cm long and 85 cm from the tip end on the head side is included in the range R1. They are electrically connected in series by a conductive fabric 23 which is knitted in the same manner as the conductive stretch fabric 21 described above.

  Then, a cloth covering 15 of substantially the same size is superimposed on the upper surface of the state detection cloth 14, and an outer edge area including several cm to several tens of cm of the area where the state detection cloth 20 is arranged It is divided and a restraint area BA is disposed in the outer area.

  A pair of connectors 24 for connecting or disconnecting signal lines to both end portions of the state detection cloth 20 electrically connected in series are provided so as to be exposed from the cloth cover 15, Are disposed at one side end in the direction of the short side of the cloth 10.

  The signal lines S1 and S2 for connecting to the measuring instrument 30 may be connected to the pair of connectors 24 arranged at one side end of the bottom 20 in the short side direction, and the wiring work of the signal lines S1 and S2 is facilitated. By removing the connector 24 and the signal lines S1 and S2, the cloth 10 can be easily cleaned.

  A metal female snap button is preferably used as the connector 24. It consists of a concave metal fitting 24a into which the convex metal fitting of the male snap button is fitted, and a fixing metal fitting 24b for fixing the concave metal fitting 24a so as to sandwich the bed main body 11 and the state detection cloth 20. The female snap button and the state detection cloth 20 are electrically connected by caulking the metal fitting 24a.

  As shown in FIG. 2D, crimped terminals 29 are crimped to the end portions of the signal lines S1 and S2 on the copper wire from which the insulation coating has been removed. The crimp terminal 29 is configured to include a fixing fitting 29b connected to the annular portion 29a, and the fixing fitting 29b is crimped so as to be electrically connected to the copper wires of the signal lines S1 and S2.

  A convex metal fitting 28a and a fixing metal fitting 28b which constitute a male male snap button made of metal as the connector 29 are crimped so as to sandwich the annular portion 29a. By engaging the male snap button with the female snap button, the state detection cloth 20 and the signal lines S1 and S2 are electrically connected.

  As described above, the condition detection cloth 20 is joined to the cloth main body 11 by sewing or bonding. For example, by being stretch-stitched using any of overlock stitching, flat stitching, chain stitching, zigzag stitching and the like, the state detection cloth 20 is stretched following the stretch of the cloth main body 11. In addition, in the case of sewing using an elastic thread, non-elastic sewing may be used.

  Further, for example, the state detection cloth 20 is spread using the adhesive that can be bonded by heat treatment lower than the heat deformation temperature of the heat-deformable elastic yarn such as polyurethane used for the detent cloth constituting the cloth main body 11. It may be adhered to

  For example, polyurethane hot melt resin, polyester hot melt resin, polyamide hot melt resin, EVA hot melt resin, polyolefin hot melt resin, styrene elastomer resin, moisture curing hot melt resin, reactive hot melt resin, etc. Can be mentioned. Among them, a moisture curing type hot melt resin is particularly preferable in that it has high adhesive strength and can be bonded in a short time.

  When bonding the state detection cloth 20 to the lining body 11 using an adhesive, the zigzag pattern is not applied to the entire surface of the state detection cloth 20, but is folded back at the width direction end of the state detection cloth 20. It is preferable to adopt a linear repeating pattern having a width of about 1 mm, such as a sine curve, or an arbitrary pattern in which the bonding positions are distributed in a dot shape across the non-bonding area.

  When the adhesive is applied to the entire surface, there is a possibility that the expansion of the state detection cloth 20 may be suppressed by the adhesive when the cloth main body 11 is expanded, but when adhering with the above pattern, the state detection follows the expansion of the cloth main body 11 The dough 20 will be stretched.

  In the present embodiment, in the cloth main body 11, the state detection cloth 20 is in the region R1 located at the waist of the protected person H in a lying position in which the long axis of the body of the protected person H is along the long side of the mattress 4. Although an example in which a plurality of the sheets are arranged in parallel in the short side direction of the cloth main body 11 has been described, a plurality of the lines may be arranged in parallel in the long side direction of the cloth main body 11 in the region R1. In order to electrically connect the state detection cloth 20 and the conductive cloth 23, either connection using an adhesive or connection using a conductive yarn can be employed.

  FIG. 6B shows an example in which a plurality of state detection cloths 20 are arranged in parallel in the long side direction of the cloth main body 11 in the region R1. Also in this case, each of the state detection cloths 20 is electrically connected in series by the conductive cloth 23 described above, and signals are sent to both ends of the state detection cloth 20 electrically connected in series, which are signal extraction ends. It is preferable that a pair of connectors 24 for connecting or disconnecting the lines S1 and S2 be provided, and the connectors 24 be disposed at one side end in the short side direction of the cloth main body 11.

  When the degree of expansion and contraction of the knitted fabric of the cloth main body 11 is larger in the course direction than in the wale direction, the longitudinal direction of the state detection cloth 20 is disposed along the course direction of the knitted fabric of the cloth main body 11 In the opposite case, it is preferable that the longitudinal direction of the state detection cloth 20 be arranged along the wale direction of the knitted fabric of the cloth main body 11.

  No matter how the posture of the protected person changes on the bed 1, a load is surely applied to the area corresponding to the waist on the mattress 4 until it leaves the bed, and the load changes depending on the posture. By grasping the change, it becomes possible to accurately detect the change in posture of the person on the bed.

  Such a state detection cloth 20 is disposed on the reverse side of the back cloth main body 11, that is, on the side opposite to the side in contact with the skin of the person to be protected, and therefore the person to be protected does not have a particular discomfort.

  In particular, a plurality of band-shaped cloths are arranged by arranging a plurality of state detection cloths 20 composed of band-shaped cloths in parallel in the long side direction or the short side direction of the cloth main body 11 and electrically connecting them in series. Even if any part of the body stretches, the load received from the waist of the person to be protected can be properly detected.

  For example, when the posture of the person to be protected is recumbent, the contact area with the mattress 4 is large and the load is dispersed, so a large load is not applied near the waist, but when it is a sitting position The contact area with the mattress 4 is reduced, and the load is concentrated, and a large load is applied near the waist. By capturing such a change, it is possible to determine the posture of the protected person.

  As shown in FIG. 6A, a plurality of state detection cloths 20 are arranged in parallel in the long side direction or the short side direction of the cloth main body 11 in a region R2 located on the head of the person in a lying position. It is preferable that each be electrically connected in series, and in this example, two state detection fabrics 20 are arranged in parallel from the position of 40 cm from the head side of the cloth main body 11, and the conductive fabric 23 As well as being connected in series, connectors 24 are provided at both ends.

  When the posture of the protected person on the bed 1 changes from the lying position to the sitting position, the load on the head applied to the mat changes significantly. Therefore, when the state detection fabric 20 is disposed in the region R2 of the bed main body 11 positioned on the head of the protected person in a recumbent position, the posture determination unit further refines the posture of the protected person based on changes in the electrical characteristics. It will be possible to judge well.

  As shown in FIGS. 7 (a) and 7 (b), SCY covered with the elastic yarn 26 as the core and the SCY covered with the conductive yarn 25 in a single layer or as DCY covered with the double yarn 27 as the conductive stretch fabric 21. It is also possible to use a fabric knitted by.

  As shown in FIG. 7C, when the fabric is stretched, the elastic thread 26 itself stretches to widen the gap between the conductive threads 25 wound, and the contact points of the conductive threads between adjacent courses decrease. The resistance value changes due to

  FIG. 7 (d) illustrates a plain knit using such covering yarn. Although either SCY or DCY may be used as the covering yarn, DCY is more preferable because it has crossing portions between the conductive yarns, conductivity can be ensured, the coating density is easily increased, and the effect of lowering the initial resistance value can be obtained. The draft ratio of the elastic yarn and the twist number of the conductive yarn may be similar to the covering yarn generally used for wearing on the skin (for example, the draft ratio of about 1.0 to 5.0 times, the twist number of about 50 to 2000 T / m) .

  As in this example, the state detection cloth 20 can be knitted integrally with the cloth main body 11, and only the area of the cloth main body 11 where the state detection cloth 20 is to be placed is integrally knitted with the cloth main body 11. Is also possible. Further, as an aspect of knitting integrally with the cloth main body 11, the covering yarn described above may be sewn into the cloth after knitting of the cloth main body 11 to function as the state detection cloth 20.

  In the embodiment described above, an example was described in which the state detection cloth 20 for detecting a change in the expansion / contraction state of the cloth main body 11 detects a change in resistance as the electrical property, but other than the resistance as the electrical property To detect a change in inductance value. For example, the state detection fabric 20 may be knitted with a yarn covered with a conductive yarn covered with an insulating coating, using an elastic yarn such as polyurethane as a core yarn. It is possible to utilize the property that the inductance value changes according to the expansion and contraction state of the insulation coated conductive yarn that functions as a coil in accordance with the expansion and contraction of the core yarn.

  In addition, electrode elements using a pair of conductive fibers are arranged along the cloth main body so that the distance between the pair of electrodes changes with expansion and contraction of the cloth main body, and electrostatic It may be configured to detect changes in capacitance.

  Although the above-mentioned embodiment explained the example by which a bed was arranged to cover the upper surface of a mattress on a bed, it may be a bed arranged to cover at least the upper surface of a cushioning material, and Besides being used for covering, it can also be used as a bed covering a futon covered in a tatami mat, a bed covering a seat surface and a backrest of a sofa, and a bedspread covering a seat surface and a backrest of a chair.

  In the embodiment described above, an example is described in which the bed is used for covering a cushioning material that elastically deforms in accordance with the movement of a subject such as a mattress on a bed, but the bed according to the present invention Since the change can be detected if the degree of extension of the main body of the cloth changes due to the change in posture, the present invention is not limited to the embodiment in which the cushioning material is used. The movement of the protected person can be detected even when the protected person moves on the cloth and the cloth partially stretches along with the movement, and the floor with a certain degree of hardness, that is, no cushioning. It is also possible to use it on a floor.

  FIG. 8 shows a behavior determination and protection system 100 in which the above-described cloth 10 is incorporated as one of the sensor systems for detecting the behavior of a person to be protected.

  The behavior determination and protection system 100 is a behavior determination and protection system that determines and protects the behavior of the protected person H on the bed 1, and a plurality of sensor systems M1 and M2 that detect the behavior of the protected person H according to different principles. , M3, a posture determination unit 50, and a plurality of alerting mechanisms 60 having different information transmission methods.

  A first sensor system M1 including the above-described bed 10 and a measuring device 30 connected to the state detection cloth 20 disposed on the bed 10 and provided on the side of the bed 1 to detect the bed leaving the bed 1 A second sensor system M2 configured by an optical sensor including a light emitting unit 40 and a light receiving unit 41, and an infrared camera M3 capable of viewing the bed 1 (disposed near the ceiling of a room) It is a third sensor system M3.

  Posture determination unit 50 determines a change in posture of protected person H on the bed (for example, presence or absence of preliminary action for bed departure such as posture change from lying position to sitting position) by first sensor system M1, and The 2 sensor system M2 detects the leaving behavior of the protected person H (for example, the presence or absence of an action to leave the bed), and the third sensor system M3 determines the operating state of the protected person H, and Comprehensively determine the attitude of the guardian.

  In the case of determining the behavior of the protected person H using a single sensor system, there is a high probability that information other than the dangerous operation will be misunderstood and erroneously recognized when acquiring information such as the dangerous operation, and so on. Because it is often difficult to achieve the above, multiple sensor systems are used to increase the reliability.

  The posture determination unit 50 is hierarchized based on a signal input unit 51 for inputting detection values by the sensor systems M1, M2 and M3, and a crisis probability diverging in time based on each detection value input to the signal input unit 51. The calculation unit 52 selects one of the plurality of warning mechanisms 60 by applying the decision making method, and the signal output unit 53 operates the warning mechanism 60 selected by the calculation unit 52.

  The alerting mechanism 60 is provided with a first alerting mechanism 61 configured to alert the protected person H to stop the bed leaving and a second alerting mechanism 62 configured with an alerting device that requests the guardian to move out. .

  The first alerting mechanism 61 includes a liquid crystal monitor device, a television tuner, and a storage device for storing content to be displayed on the liquid crystal monitor device, in addition to display signals from the television tuner.

  As content, television programs with strong affection by the protected person H, such as famous dramas, videos of family members with attachments, photos and sounds, videos of social activities that have been engaged so far, and sports that they have enjoyed Are selectively stored in the storage device.

  The operation unit 52 determines the degree of the risk by the stratification decision-making method when it is determined that the protected person has a sign of leaving behavior based on the detection values by the input sensor systems M1, M2, and M3. Is calculated and any alerting mechanism 60 is activated from the calculated value.

  For example, when it is determined that the risk of risk is relatively low, but the possibility of connection to leaving the bed is high, the first alerting mechanism 61 is activated to output a television program with strong conviction of the person H to the liquid crystal monitor device. Discourage leaving behavior.

  In addition, based on the detection values of the sensor systems M1, M2, and M3 after activating the first alerting mechanism 61, when it is determined that the possibility of being connected to the bed departure behavior that increases the possibility of encountering danger is high. The second alerting mechanism 62 is activated to request the guardian to move out, and the first alerting mechanism 61 is activated to output an image, a picture and a sound of an attached family to the liquid crystal monitor device.

  According to the above-described configuration, the existing television or other device is activated, and for example, delaying the bed to prevent falling during falling out of the bed or interlocking with a device such as a nurse call or a video camera. It is possible to urge the staff to communicate according to the degree of risk of

  In this manner, by determining the degree of the betrayal of the protected person by the hierarchical decision making method and activating the appropriate alerting mechanism 60, an accident such as falling of the protected person from the bed or falling is prevented. It is configured to prevent.

  In other words, the operation unit 52 may obtain the dangerous operation from the sensor system arranged in multiples, determine the encounter risk of the danger, or may encounter the danger of time dependency by calculating to diverge in time. Is quantified and the danger encounter probability is determined by superimposing the results obtained from the respective sensor systems.

  As a result, even if the risk encounter probability increases, the staff will not be alerted if the risk level decreases or the dangerous operation is interrupted after that. This not only has the advantage of not disturbing the normal work of the nursing staff, but also has the advantage of being able to perform an action for risk avoidance more appropriately when being alerted.

  The hierarchical decision making method AHP (Analytic Hierarchy Process) is a calculation method in which when there are a plurality of different elements, each element can be combined continuously and can be treated as one element. By constructing a hierarchical structure in which elements are combined in series or in parallel, and placing weights calculated based on the results of comparison based on the importance of events etc. for each element, different elements of the criteria can be identical It can be handled. The alternatives prepared in advance are selected from the results obtained in this way.

  An operation process for hierarchical decision making by the operation unit 52 is illustrated. The storage unit provided in the calculation unit 52 has a hierarchy of detection values by each of the sensor systems M1, M2, and M3 presenting a problem due to decision making, and an output indicating which of the alerting mechanisms 60 is activated to cope with the problem. Each hierarchy data of the evaluation criteria for evaluating which of the hierarchy and the hierarchy of the detection value to the hierarchy of the output value is stored is stored.

  The evaluation criteria are for each evaluation item based on a pair comparison table for the evaluation item of the hierarchy of the detection value set in advance and a pair comparison table for the evaluation item of the output hierarchy for the values detected from each measuring device. It consists of a weight that represents the importance determined and the crisis encounter probability that is calculated using a coefficient that diverges in time. As the evaluation item of the hierarchy obtained from the detection value, for example, supine position, lateral position, turning over, sitting position, preliminary movement to leave the bed, etc. are set, and as an evaluation item of the output hierarchy, for example, one alerting mechanism 60, a combination of each alerting mechanism 60 is set.

  The calculation unit 52 obtains an evaluation value from the weight of the evaluation item corresponding to each of the input detected values, the weight of the evaluation item of the output hierarchy, and the possibility of encountering a time-dependent crisis, and the result is The alerting mechanism 60 is operated.

  The weights of the evaluation items and the crisis probability are configured to be corrected based on the results of the prior simulation and operation test of the present system. For example, when there is no effect of the action for suppressing the bed leaving, an evaluation input unit to that effect is provided, the value of the pair comparison table is corrected based on the result, or the weight and the crisis probability are corrected. Ru.

  The embodiments described above show one aspect of the present invention, and the scope of the present invention is not limited by the description of the embodiments.

  The cloth according to the present invention can be easily cleaned even if it gets soiled, and is widely used, for example, in a nursing home or the like as a sensor that can accurately determine the operation state of the human body on the bed.

1: Bed 4: Mattress 10: Bed cloth 11: Bed body 14: State detecting bed 15: Bed covering 20: State detecting cloth 21: conductive stretch cloth 22: non conductive stretch cloth 23: conductive cloth 24: connector 25: Conductive yarn 26: Elastic yarn 30: Measuring instrument 100: Behavior determination protection system BA: Restraint area NBA: Non-restraint area

Claims (6)

A state detection spreader in which a state detection member for expanding and contracting integrally with the elastic bed body and converting a change in the elastic state of the bed body to a change in electrical characteristics is disposed in a partial region of the bed body; A covering covering disposed on the detection covering and extending along with the extension of the covering main body;
A restraining region for mutually restraining the relative positions of the covering covering and the state detection covering not to be separated from each other, and a non-restricting region for permitting the relative position to be separated are divided.
A cloth in which the state detection member is disposed in the non-restraint area.   The cloth according to claim 1, wherein the non-restraint area is surrounded by the restraining area.   The cloth according to claim 1 or 2, wherein the restraining region is formed by sewing or bonding the cloth covering and the state detection cloth at predetermined intervals on a joint surface. The bed is arranged to cover at least the upper surface of the cushioning material,
The state detection member is a long side direction or a short side of the bed main body in a region located on the waist and / or the head of the person in a lying position in which the long axis of the body is along the long side of the cushion material. The cloth according to any one of claims 1 to 3, wherein a plurality of the cloths are arranged in parallel in a direction, and each of the cloths is constituted by a band member electrically connected in series.   The state detection member is provided with a conductive stretchable fabric which is woven or bonded integrally with the cloth main body and whose electric resistance changes in correlation with the stretch state of the cloth main body. The bed described.   The conductive stretch fabric is composed of a knitted fabric in which the loops formed of the conductive yarn are in contact with each loop in a contracted state in the course direction and the loops are separable in an extended state in the course direction. The bedding according to claim 5.