JP2017196326A - Bed pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a manufacturing cost by constituting a bed pad of a small number of components, while reliably regulating slip motion of respective spring units in a bed pad including a plurality of spring units.SOLUTION: An elastic unit 3 coveredly fixed by a pair of upper/lower surface materials 1 and 2 comprises: a pair of upper/lower cushion materials 14 and 15 composed of urethan foam; and a plurality of spring units 10-12 composed of a group of pocket coils 13. A pair of upper/lower flat spring bearing walls 20 for receiving vertical spring force of a coil spring 18 are provided on a nonwoven-fabric bag body 19 constituting respective pocket coils 13. The group of spring bearing walls 20 of upper/lower surfaces of the respective spring units 10-12 are stuck and fixed to upper/lower cushion materials 14 and 15, so that the respective spring units 10-12 are integrated with both cushion materials 14 and 15 to prevent slip motion.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mat pad used by laying on an upper surface of a bed mattress, a mattress or the like.

  This type of laying pad is known, for example, from Patent Document 1. In this case, a three-dimensional knitted fabric is laminated on at least the surface of a sheet-like urethane foam to constitute a spread pad. When this laying pad is used, a comfortable sleeping feeling can be obtained due to the soft tactile sensation and good air permeability of the surface solid knitted fabric. Further, the urethane foam absorbs the weight, so that the residual strain of the three-dimensional knitted fabric can be effectively reduced, and the initial good cushioning property of the three-dimensional knitted fabric can be maintained over a long period of time.

  On the other hand, in the bed mattress market, a large number of spring mattresses having a spring unit in which a large number of coil springs are arranged side by side are distributed. The spring mattress mainly includes a Bonnell coil mattress in which coil springs are connected by a helical wire, and a pocket coil mattress in which coil springs are housed in bags one by one and are independent from each other. The present invention provides a spread pad incorporating a pocket coil type spring unit.

  As a known example of a conventional pocket coil mattress, for example, Patent Document 2 can be cited. There, a lower elastic body and an upper elastic body that divide a rectangular parallelepiped housing space, a partition elastic body that divides the housing space into the front and rear and the left and right, and a spring unit that is housed one by one in each of the divided spaces. A pocket coil type mattress is constituted by the outer body covering the outer surfaces of the lower elastic body and the upper elastic body. By accommodating a spring unit having a desired elastic characteristic of the user in each space divided by the partitioning elastic body, the elastic characteristic of the mattress can be changed for each part according to the user's preference. Each spring unit is configured by covering a group of pocket coils arranged in the front, rear, left, and right with a cloth bag, and each pocket coil is formed in a cylindrical shape whose vertical dimension is sufficiently larger than the diameter dimension. The inner surface of the side wall of the lower elastic body and the surface of the elastic body for partitioning are formed with protrusions that contact the side surfaces of the spring unit while being elastically deformed. Is regulated.

JP 2006-109896 A JP 2010-252937 A

  In general, the laying pad is formed to be sufficiently thin as compared with a mattress for a bed so as to be stored or carried in a folded state or a spirally wound state. For example, a typical bed mattress has a vertical thickness of about 20 cm, whereas a floor pad has a vertical thickness of about 6 cm.

  It is possible to make a bed pad that can be folded and wound by sufficiently reducing the vertical dimension of the spring unit or the like of the bed mattress described in Patent Document 2. However, the laying pad in this case requires an elastic body for partitioning that divides the accommodation space of the spring unit, so that the material cost of the laying pad increases accordingly. Further, when the elastic force of the spring unit and the partitioning elastic body are greatly different, the user may feel uncomfortable at the boundary portion between the two.

  An object of the present invention is to reduce the manufacturing cost of a laying pad having a plurality of spring units by constructing the laying pad with a small number of parts while reliably regulating the displacement movement of each spring unit. is there.

  The laying pad according to the present invention includes a pair of upper and lower outer covering materials 1 and 2 and an elastic unit 3 accommodated between the upper and lower outer covering materials 1 and 2. The peripheral edges of the two facing materials 1 and 2 are sewn in a circular shape, and the elastic unit 3 is covered and fixed by the two facing materials 1 and 2 so that they cannot be displaced. The elastic unit 3 includes a pair of upper and lower cushion materials 14 and 15 made of urethane foam, and a plurality of spring units 10 to 12 disposed adjacent to each other between the cushion materials 14 and 15 along the longitudinal direction of the elastic unit 3. Consists of. Each of the spring units 10 to 12 is composed of a group of pocket coils 13 that are arranged adjacent to each other in the vertical and horizontal directions, and each pocket coil 13 can be expanded and contracted in the vertical direction, and a non-woven bag body that wraps the coil springs 18. 19. Each bag 19 includes a pair of upper and lower flat spring receiving walls 20 that receive the spring force of the coil spring 18 in the vertical direction. A group of spring receiving walls 20 of the upper and lower surfaces of each spring unit 10-12 is bonded and fixed to the upper and lower cushion members 14, 15, so that each spring unit 10-12 cannot move with respect to both cushion members 14, 15. It is characterized by being integrated.

  In a state where the elastic unit 3 is covered and fixed with the pair of outer covering materials 1 and 2, it is preferable to set the diameter dimension D of the coil spring 18 of each pocket coil 13 to be larger than the vertical dimension H.

  It is preferable to fix the adjacent spring units 10 to 12 indirectly through a pair of upper and lower cushion members 14 and 15.

  The elastic unit 3 includes three spring units 10 to 12 that are adjacent to each other in the longitudinal direction, and the dimensions of the spring units 11 and 12 at both ends in the longitudinal direction of the elastic unit 3 are set to be the same. The cushion materials 14 and 15 can be formed of urethane foam having the same vertical thickness.

  Each pocket coil 13 constituting the central spring unit 10 has higher elastic force than each pocket coil 13 constituting the spring units 11 and 12 at both ends, and the central spring unit in the longitudinal direction of the elastic unit 3. It is possible to adopt a form in which the dimension of 10 is set to be more than one third of the total length of the elastic unit 3 and less than one half.

  In the present invention, the peripheral edges of the pair of upper and lower surface covering materials 1 and 2 are sewn in a circular shape, and the elastic unit 3 is covered and fixed by the both surface covering materials 1 and 2 so as not to move. The elastic unit 3 includes a pair of upper and lower cushion members 14 and 15 made of urethane foam and a plurality of spring units 10 to 12 made of a group of pocket coils 13, and the upper and lower surfaces of the spring units 10 to 12 are formed. The upper and lower cushion materials 14 and 15 were bonded and fixed. According to the laying pad configured as described above, the movement of the elastic unit 3 with respect to the covering materials 1 and 2 and the movement of the spring units 10 to 12 with respect to the cushioning materials 14 and 15 are reliably regulated and laid. The proper arrangement of the elastic unit 3 and its spring units 10 to 12 at the beginning of the pad production can always be maintained, and therefore a comfortable feeling can be always provided to the user of the pad. Even if there is no partition elastic body used in conventional mattresses for beds, the displacement movement of each spring unit 10-12 can be regulated, so that the pad cost can be configured with a small number of parts and the material cost can be reduced. Accordingly, the spread pad can be manufactured at a low cost. Further, since the spring units 10 to 12 can be arranged adjacent to each other without using a foreign object such as an elastic body for partitioning, the possibility that the user feels uncomfortable at the adjacent part of the spring units 10 to 12 is eliminated. Sleeping comfort can be improved.

  Further, according to the present invention, the non-woven bag 19 constituting each pocket coil 13 is provided with a pair of upper and lower flat spring receiving walls 20 for receiving the vertical spring force of the coil spring 18. Since the wall 20 is bonded to the cushioning material 14/15, the bonding area between each pocket coil 13 and the cushioning material 14/15 is sufficiently increased, and the spring units 10 to 12 are firmly bonded to the cushioning material 14/15. it can. The spring force in the vertical direction of the coil spring 18 also contributes to pressing the pair of upper and lower spring receiving walls 20 against the cushion members 14 and 15 and maintaining a good adhesion state thereof.

  If the diameter dimension D of the coil spring 18 of each pocket coil 13 is set to be larger than the vertical dimension H, the vertical dimension of the pocket coil 13 can be increased as compared with the case where a vertical pocket coil used in a conventional bed mattress is used. The area of the spring receiving wall 20 of the bag body 19 can be increased. Therefore, the bonding area between each pocket coil 13 and the cushion materials 14 and 15 can be further increased, and the spring units 10 to 12 can be more firmly bonded to the cushion materials 14 and 15. Moreover, according to this invention, compared with the case where the conventional vertically long pocket coil is used, the spring units 10-12 can be comprised with a small number of pocket coils 13, and the spring units 10-12 are lightened by that much, Moreover, the material cost can be reduced.

  It is preferable that the adjacent spring units 10 to 12 be fixed indirectly via a pair of upper and lower cushion members 14 and 15 to eliminate the connection structure of adjacent portions of the spring units 10 to 12. If the connection structure is provided in the adjacent portion, the connection structure may give the user of the pad a foreign object, and the user's comfort may be reduced. On the other hand, when the adjacent spring units 10 to 12 are indirectly fixed and the connecting structure of the adjacent portions is abolished as in the present invention, the feeling of foreign matter caused by the connecting structure is eliminated, and the user Sleeping comfort can be improved.

  Of the three spring units 10 to 12 adjacent in the front-rear direction (longitudinal direction of the elastic unit 3), the front-rear dimensions of the spring units 11 and 12 at the front and rear ends are set to be the same, and a pair of upper and lower cushion members 14. When 15 is formed of urethane foam having the same vertical thickness, the elastic unit 3 can be formed symmetrically in the front-rear direction and in the vertical direction, and the laying pad can be used without distinction between the front-rear side and the upper-lower side (front and back). Thus, if the distinction between the front and back and the top and bottom of the laying pad is eliminated, a rotation that periodically flips the laying pad back and forth or upside down becomes possible. When the pad is rotated periodically, it becomes difficult for the spring units 10 to 12 to partially sag due to long-term use, so that the pad can be extended in life.

  When the central spring unit 10 is constituted by a highly elastic pocket coil 13 and is set to a size exceeding one third of the overall length of the elastic unit 3, the waist of the user of the pad is placed on the high elastic spring unit 10. You can catch it. If the waist where the user's weight is most concentrated is supported by the highly elastic spring unit 10, the user's sleeping posture can be made good and the user's sleeping comfort can be improved. In addition, when the dimension of the highly elastic spring unit 10 does not exceed one third of the total length of the elastic unit 3, the sleeping posture in which the user who is particularly short is leaning toward one side end in the longitudinal direction of the pad is used. In this case, the waist may not be supported by the highly elastic spring unit 10. Further, since the highly elastic spring unit 10 is relatively expensive, when the spring unit 10 is set to a size less than one half of the overall length of the elastic unit 3, the highly elastic spring unit occupying the elastic unit 3 is used. The problem of the increase in material cost accompanying the increase in the ratio of 10 can be solved.

It is a longitudinal cross-sectional view which shows the principal part of the spread pad which concerns on the Example of this invention. It is the (a) partially broken plan view and (b) side view of the spread pad concerning an example. It is a disassembled perspective view of the laying pad which concerns on an Example. It is a partially broken top view of a spring unit. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a figure which shows the (a) trifold state and (b) winding state of the laying pad which concern on an Example.

(Example) FIG. 1 thru | or FIG. 7 shows the Example of the laying pad which concerns on this invention. In the present embodiment, front and rear, left and right, and up and down are in accordance with the arrows shown in FIGS. The longitudinal direction of the laying pad in the present invention coincides with the front-rear direction in the present embodiment. Moreover, the left-right direction and the up-down direction in a present Example correspond to the width direction and thickness direction of a spreading pad, respectively.

  2 and 3, the laying pad is configured by accommodating the elastic unit 3 between a pair of upper and lower outer covering materials 1 and 2 made of quilted fabric. The elastic unit 3 includes three spring units 10 to 12 that are adjacently disposed in the front-rear direction and a pair of cushion members 14 and 15 that cover the upper and lower surfaces of the units 10 to 12. Each of the spring units 10 to 12 is formed in a rectangular sheet shape with a group of pocket coils 13 that can be expanded and contracted in the vertical direction adjacent to each other in the vertical and horizontal directions. The spring units 11 and 12 at the front and rear ends have the same shape, and the spring unit 10 at the center of the front and rear is formed longer than the spring units 11 and 12 at the front and rear ends. The upper and lower cushion members 14 and 15 are made of urethane foam and are formed in the same rectangular sheet shape. The front and rear dimensions of the cushion members 14 and 15 are substantially equal to the sum of the front and rear dimensions of the three spring units 10 to 12. The cushion members 14 and 15 have substantially the same left and right dimensions as the spring units 10 to 12, and are formed thinner in the vertical direction than the spring units 10 to 12.

  The laying pad according to the present embodiment is a single size, and the left and right dimensions of the spring units 10 to 12 and the cushion members 14 and 15 constituting the elastic unit 3 are set to 100 cm, respectively. Further, the front-rear dimension of the central spring unit 10 was set to 85 cm, the front-rear dimension of the front-rear spring units 11, 12 was set to 55 cm, and the front-rear dimension of each cushion member 14, 15 was set to 195 cm. The central spring unit 10 is composed of an assembly of 600 pocket coils 13, and 24 pocket coils 13 are arranged in the front-rear direction and 25 pocket coils 13 in the left-right direction. The front and rear spring units 11 and 12 are each composed of an assembly of 400 pocket coils 13, and 16 pocket coils 13 are arranged in the front-rear direction and 25 pocket coils 13 in the left-right direction. Note that the present invention can also be applied to a semi-double size or double-size laying pad whose left and right dimensions are different from the single size. The semi-double size pad has a left and right dimension set to 120 cm, for example, and each of the spring units 10 to 12 has 30 pocket coils 13 arranged side by side. The double size pad has a left and right dimension set to, for example, 140 cm, and each of the spring units 10 to 12 is configured by arranging 35 pocket coils 13 on the left and right.

  4 and 5, each pocket coil 13 includes a hollow cylindrical coil spring 18 that can expand and contract in the vertical direction and a non-woven bag 19 that encloses the coil spring 18. The bag body 19 includes a pair of upper and lower flat spring receiving walls 20 that are in close contact with the end windings of the upper and lower ends of the coil spring 18 and receive the vertical spring force of the coil spring 18. Each spring unit 10-12 comprised by this pocket coil 13 can be produced from the some coil spring 18 and the coating sheet 21 * 21 made from two sheets of nonwoven fabrics. Specifically, the coil springs 18 are arranged vertically and horizontally between the two covering sheets 21 and 21, and the two covering sheets 21 and 21 are perforated by heat welding between the adjacent coil springs 18 and 18. The grid-like partition lines 22 are formed so as to surround each coil spring 18 one by one. A space surrounded by the two covering sheets 21 and 21 and the partition line 22 constitutes a pocket 23 for individually accommodating the coil spring 18.

  When the covering sheet 21 is made of a breathable material such as a nonwoven fabric, the entire spring units 10 to 12 exhibit excellent breathability in the vertical direction in combination with the coil springs 18 having a hollow cylindrical shape. Therefore, it is possible to improve the air permeability in the vertical direction as a whole of the laying pad and to make the laying pad with less stuffiness. Since each spring unit 10-12 is excellent also in the air permeability of the front-back direction and the left-right direction, moisture can be discharged also from the four peripheral edges of the elastic unit 3. The dividing line 22 may be formed in a continuous line shape, for example, other than the perforation, and may be formed by a method such as sewing or adhesion other than heat welding.

  As shown in FIG. 1, the coil spring 18 of each pocket coil 13 constituting the central spring unit 10 is formed of a thicker wire than the coil spring 18 of each pocket coil 13 constituting the front and rear spring units 11, 12. Therefore, the former pocket coil 13 has a higher elastic force than the latter pocket coil 13. Specifically, the wire diameter L1 of each coil spring 18 of the central spring unit 10 is set to 1.2 mm, and the wire diameter L2 of each coil spring 18 of the front and rear spring units 11 and 12 is set to 1.0 mm. . In this embodiment, the central spring unit 10 constituted by the highly elastic pocket coil 13 is formed longer in the front and rear than the front and rear spring units 11 and 12, and the waist of the user of the pad is placed in the central spring. It can be received by unit 10. If the waist where the user's weight is most concentrated is supported by the highly elastic spring unit 10, the user's sleeping posture can be made good and the user's sleeping comfort can be improved.

  As shown in an enlarged view in FIG. 1, the spring units 10 to 12 are fixed to the upper and lower cushion members 14 and 15 via flexible adhesive layers 25, respectively. In the present embodiment, a liquid adhesive is sprayed on the inner surfaces of the upper and lower cushion members 14 and 15 with a spray gun to form an adhesive layer 25, and a group of spring receiving walls 20 on the upper and lower surfaces of the spring units 10 to 12 are bonded. By pressing against the agent layer 25, the spring units 10 to 12 and the cushion materials 14 and 15 were bonded and fixed. Of course, instead of spraying the adhesive on the cushion members 14 and 15, an adhesive may be sprayed on the outer surface of each bag body 19 of the spring units 10 to 12, and both the cushion materials 14 and 15 and each bag body 19 may be sprayed. Adhesive may be sprayed on. The adhesive which comprises the adhesive bond layer 25 can be suitably selected from what can adhere | attach urethane foam and a nonwoven fabric. When the spring units 10 to 12 and the cushion materials 14 and 15 are bonded and fixed in this way, the spring units 10 to 12 are integrated with the cushion materials 14 and 15 so that they cannot move and are elastic. Unit 3 can be obtained.

  When the flat spring receiving wall 20 of the bag body 19 of each pocket coil 13 is bonded to the cushion members 14 and 15, the bonding area between each pocket coil 13 and the cushion members 14 and 15 is sufficiently increased, so that the spring units 10 to 12 are used. Can be firmly bonded to the cushion members 14 and 15. Further, in this embodiment, the diameter dimension D of each coil spring 18 is set to be larger than the vertical dimension H (see FIG. 5), and compared to the case of using a vertically long pocket coil used in a conventional bed mattress. Since the area of the spring receiving wall 20 with respect to the vertical dimension of the pocket coil 13 is increased, the bonding area between each pocket coil 13 and the cushion material 14/15 is further increased, so that the spring units 10-12 are made into the cushion material 14/15. On the other hand, it can be more firmly bonded. The spring force in the vertical direction of the coil spring 18 also contributes to pressing the pair of upper and lower spring receiving walls 20 against the cushion members 14 and 15 and maintaining a good adhesion state thereof. Further, when the diameter dimension D of each coil spring 18 is set to be larger than the vertical dimension H, the spring units 10 to 12 can be configured with a small number of pocket coils 13 as compared with the case of using a conventional vertically long pocket coil. The spring units 10 to 12 can be reduced in weight by that amount, and the material cost can be reduced.

  In the elastic unit 3, the central spring unit 10 and the front and rear spring units 11 and 12 are adjacent to each other through a slight gap and are indirectly fixed through upper and lower cushion members 14 and 15. As described above, when the spring units 10 to 12 are indirectly fixed and the connecting structure of the adjacent portions of the spring units 10 to 12 is abolished, the feeling of foreign matters caused by the connecting structure is eliminated, and the user's sleeping comfort is reduced. Can be improved.

  The elastic unit 3 in which the spring units 10 to 12 and the cushion materials 14 and 15 are integrated as described above is accommodated between the two outer covering materials 1 and 2. As shown in an enlarged view in FIG. 6, each of the facing materials 1 and 2 includes a woven fabric 30, a sheet-like quilt core 31 formed of polyester wadding, an elastic sheet 32 made of urethane foam, and a non-woven fabric. 33 is laminated and quilted. In order to obtain the laying pad according to the present embodiment, the elastic unit 3 is sandwiched between the two covering materials 1 and 2, the peripheral edges of both the covering materials 1 and 2 are overlapped over the entire circumference, and the edge tape 37 is covered. It suffices to sew with a thread 38 in a circular manner. The vertical and horizontal dimensions (front and rear dimensions and left and right dimensions) of the front covering materials 1 and 2 before sewing are equal to the vertical and horizontal dimensions of the elastic unit 3 so that the elastic unit 3 is not sewn between the peripheral edges. It is set large around. The peripheries of both the facing materials 1 and 2 that are sewn are located at the same height as the approximate center of the elastic unit 3 in the vertical direction. Compared to the case where the peripheral edges of the upper and lower cover materials 1 and 2 are directly sewn, as compared with the case where only the side surface of the elastic unit 3 is covered with another cover material and the cover material is sewn to the upper and lower cover materials 1 and 2, respectively. Further, the structure of the laying pad can be simplified, and further, the labor of sewing the cover material can be halved and the laying pad can be manufactured at a low cost.

  When the outer peripheries of both the outer covering materials 1 and 2 are sewn in a circular shape, the elastic unit 3 is fixedly covered and fixed by the both outer covering materials 1 and 2 so as not to move. More specifically, the main surface portions of the facing materials 1 and 2 facing the upper and lower cushion materials 14 and 15 are in pressure contact with the upper and lower surfaces of the elastic unit 3 in the vertical direction, and the peripheral portions of the main surface portions are Deviation of the elastic unit 3 in all directions (vertical direction, front-rear direction, and left-right direction) with respect to the covering materials 1 and 2 by press-contacting diagonally downward or diagonally upward with respect to the front, rear, left and right edges of the upper and lower surfaces of the elastic unit 3 Movement is regulated. In this way, when the elastic unit 3 is covered and fixed by the two facing materials 1 and 2 so as not to be displaced, fixing means such as an adhesive between the elastic unit 3 and the facing materials 1 and 2 is omitted, and only that much is manufactured. The labor required can be reduced and the laying pad can be manufactured at a low cost.

  The top and bottom thickness of the laying pad completed by covering and fixing the elastic unit 3 with the covering materials 1 and 2 is about 6 cm. This laying pad can be stored or carried in a state where it is folded in three as shown in FIG. 7 (a) or in a state of being spirally wound as shown in FIG. 7 (b). It is also possible to hang it on a basket like a futon. As described above, in the present embodiment, each spring unit 10 to 12 is composed of the pocket coil 13 in which the diameter dimension D of the coil spring 18 is larger than the vertical dimension H, and the entire padding pad is reduced in weight. It can be easily carried in a state or a spiral shape. The total weight of this pad is about 6.8 kg. The spread pad according to this embodiment is compressed in the thickness direction in the unfolded state, wound in a spiral shape, and packaged in an airtight bag and then shipped and sold.

  As described above, in the present embodiment, the peripheral edges of the pair of upper and lower surface covering materials 1 and 2 are sewn in a circular shape, and the elastic unit 3 is covered and fixed by the both surface covering materials 1 and 2 so as not to be displaced. The elastic unit 3 is composed of three spring units 10 to 12 and a pair of cushion materials 14 and 15 covering the upper and lower surfaces thereof, and the upper and lower surfaces of the spring units 10 to 12 are respectively provided to the upper and lower cushion materials 14 and 15. Bonded and fixed. According to the laying pad configured as described above, the movement of the elastic unit 3 with respect to the covering materials 1 and 2 and the movement of the spring units 10 to 12 with respect to the cushioning materials 14 and 15 are reliably regulated and laid. The proper arrangement of the elastic unit 3 and its spring units 10 to 12 at the beginning of the pad production can always be maintained, and therefore a comfortable feeling can be always provided to the user of the pad. Even if there is no partition elastic body used in conventional mattresses for beds, the displacement movement of each spring unit 10-12 can be regulated, so that the pad cost can be configured with a small number of parts and the material cost can be reduced. Accordingly, the spread pad can be manufactured at a low cost.

  In this embodiment, the front and rear spring units 11 and 12 and the upper and lower cushion members 14 and 15 are formed in the same shape, and the entire pad is formed symmetrically in the front-rear and vertical directions. ) Can be used without distinction. In this way, if the distinction between the front and back and the top and bottom of the laying pad is eliminated, it is possible to rotate the laying pad periodically upside down or back and forth. When the pad is rotated periodically, it becomes difficult for the spring units 10 to 12 to partially sag due to long-term use, so that the pad can be extended in life. However, in the present invention, it is not essential that the pad is symmetric in the front-rear direction and in the vertical direction. For example, the front-rear dimensions and elasticity of the front-rear spring units 11 and 12 may be different. The upper and lower thickness dimensions may be varied. The number of spring units constituting the elastic unit 3 is not limited to three, but may be constituted by a plurality of other, for example, five spring units.

  As a method for making the elasticity of the pocket coils 13 constituting the spring units 10 to 12 different from each other, for example, the diameter D of the coil spring 18 is different from the wire diameters L1 and L2 of the coil spring 18 as in the above embodiment. The number of turns may be different. Moreover, all the elasticity of the pocket coil 13 which comprises each spring unit 10-12 may be the same. In addition to the hollow cylindrical shape, the coil spring 18 may be formed in a drum shape in which the upper and lower centers are constricted, a barrel shape in which the upper and lower centers are swollen, or the like.

1 and 2 Surface material 3 Elastic unit 10 to 12 Spring unit 13 Pocket coil 14 and 15 Cushion material 18 Coil spring 19 Bag 20 Spring receiving wall 25 Adhesive layer

Claims (5)

A pair of upper and lower surface covering materials (1, 2) and an elastic unit (3) accommodated between both surface covering materials (1, 2);
The peripheral edges of both cover materials (1, 2) are sewn in a circular shape, and the elastic unit (3) is covered and fixed by both cover materials (1, 2) so that they cannot move.
The elastic unit (3) includes a plurality of cushion members (14, 15) that are vertically disposed between the pair of upper and lower cushion materials (14, 15) made of urethane foam and the longitudinal direction of the elastic unit (3). It consists of a single spring unit (10-12),
Each spring unit (10-12) is composed of a group of pocket coils (13) arranged adjacent to each other vertically and horizontally,
Each pocket coil (13) is composed of a coil spring (18) that can be vertically expanded and contracted, and a non-woven bag body (19) that wraps the coil spring (18).
Each bag (19) is provided with a pair of upper and lower flat spring receiving walls (20) for receiving the vertical spring force of the coil spring (18),
A group of spring receiving walls (20) on the upper and lower surfaces of each spring unit (10-12) are bonded and fixed to upper and lower cushion members (14, 15), and each spring unit (10-12) is attached to both cushion members (14 -A laying pad that is integrated so that it cannot move with respect to 15).   In a state where the elastic unit (3) is covered and fixed with the pair of outer covering materials (1, 2), the diameter dimension (D) of the coil spring (18) of each pocket coil (13) is larger than the vertical dimension (H). The laying pad according to claim 1, which is set.   The laying pad according to claim 1 or 2, wherein adjacent spring units (10 to 12) are indirectly fixed via a pair of upper and lower cushion members (14, 15). The elastic unit (3) includes three spring units (10 to 12) adjacent in the longitudinal direction,
The dimensions of the spring units (11, 12) at both ends in the longitudinal direction of the elastic unit (3) are set to be the same,
The laying pad according to any one of claims 1 to 3, wherein the pair of upper and lower cushion materials (14, 15) are formed of urethane foam having the same upper and lower thickness. Each pocket coil (13) constituting the central spring unit (10) has a higher elastic force than each pocket coil (13) constituting the spring units (11, 12) at both ends,
The dimension of the central spring unit (10) in the longitudinal direction of the elastic unit (3) is set to be more than one third and less than one half of the total length of the elastic unit (3). Pads described in the above.

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