JPH0624565B2 - Bedsore prevention mat - Google Patents

Description

Detailed Description of the Invention a. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bedsore prevention mat.

B. Prior Art A pressure ulcer occurs when a sick person is sleeping for a long time. Since pressure ulcers sleep for a long time in a substantially constant posture, the lower bedding continuously presses a certain part of the sick person and the capillaries at that position are pressed, causing a circulation failure of subcutaneous blood and necrosis of tissue. Refers to a condition that causes ulcers. The internal pressure of capillaries
It is around 25 mmHg, and if an external pressure higher than this is taken for a long time, the above circulatory disorder easily occurs. Pressure ulcers, also called bed rubs, cause great pain to the sick. In particular, a pressure ulcer occurs in a short period of time in a sick person who is weak and has deteriorated nutritional status.

It is considered to prevent pressure ulcer by preventing a certain part of the body from being pressed against the bedclothes for a long time, and various proposals have been made so far.

Proposal to selectively inflate air into a large number of air chambers to selectively inflate these air chambers to change the body pressure contact point (Japanese Patent Laid-Open No. 52-20173, Japanese Patent Publication No. 40-40296)
Has been done. In these methods, an air compressor and a large number of valves are required, which requires a large-scale device.
There is a problem that sleep is hindered by air discharge and noise from the air compressor.

Further, a pad having a good cushioning property, which is filled with a polyurethane gel type or a polyvinyl type gel, has been proposed (JP-A-55-38118 or JP-A-57-159847). These pads make the pressure that the body receives from the pad uniform, and the cushioning property is good, which makes the sleep rather bad, and the uniform pressure does not completely prevent the development of pressure ulcers. .

In addition to the above, a bed has been proposed in which shape memory alloy springs are arranged and these springs are selectively heated to change the pressure distribution (Japanese Patent Laid-Open No. 59-129021).
However, arranging a large number of shape memory alloy springs leads to an increase in manufacturing cost.

C. OBJECT OF THE INVENTION The present invention has a simple structure, operates quietly, can be manufactured at low cost, and can expand and contract in a predetermined direction (for example, the vertical direction) to change the support position of a supported body, for example, for a sick person. It is an object of the present invention to provide a pressure ulcer prevention mat capable of preventing pressure ulcer development by changing the pressure applied to multiple parts of the body with time.

D. The present invention is a reversible swelling / contracting substance that absorbs a swelling liquid and swells in one temperature range with a predetermined temperature as a boundary, and discharges and swells the swelling liquid in the other temperature range. A plurality of expandable and contractible liquid-tight first containers for containing a substance, and a plurality of first and second expandable and expandable liquid-tight containers for accommodating each of the first containers and expandable and contractible only in a selected predetermined direction (for example, the vertical direction) A second container, a liquid guiding section for moving the swelling liquid between the first containers, and a heating means for heating the substance for each of the first containers, with the predetermined temperature as a boundary. By the swelling and contraction of the substance due to the temperature change of the substance, the second container expands and contracts in the predetermined direction to change the support position of the supported body supported by the second container. Related to mats for pressure ulcer prevention.

E. Examples Hereinafter, examples of the present invention will be described.

1 and 2 show a state in which a sick person is sleeping on a pressure ulcer prevention mat (hereinafter, simply referred to as a mat). FIG. 1 is a schematic front view of main parts, and FIG. 2 is a plan view of the same. is there. N (12 in this example) bags B ₁ , B ₂ , on the common substrate 1,
B ₃ , ..., B _n (B _{12 in} this example) are arranged, and thin bedding (sheets, for example) 10 is placed thereon, and the sick person 11 sleeps on this thin bedding 10. . Bags B ₁ , B ₂ , B ₃ , ..., B ₁₂ are plain weave fabrics that can expand and contract only in the vertical direction (for example, warp threads made of polyester,
Weft yarn made of spandex).

A rubber liquid-tight package and a plate-shaped heating element 7 sandwiched between the package and the bag at the bottom are housed in each bag, which will be described later with reference to FIGS. 4 to 6. To do.

The bags B ₁ , B ₂ , B ₃ , ..., B ₁₂ have a length close to the length l ₂ in the width direction of the substrate 1 and are arranged in a row in the length direction of the substrate 1. The internal packages are made to communicate with each other by the branch pipes 5 and the flexible communication pipes 6 connected to the branch pipes 5 (see FIGS. 3 and 4). Board 1
The mat 10 and the mat 10 may be appropriately determined according to the size of the target bed, but here, for example, the length l ₁ is 2
m, width l ₂ is 90 cm.

FIG. 3 is a partially enlarged view of FIG. Bed (or tatami)
A common substrate 1 is placed on the substrate 9, and bags B ₁ , B ₂ , B ₃ , ... On the substrate 1 are provided with through holes Ba through which the branch pipes 5 are inserted. Bags B ₁ , B ₂ , B ₃ , ………
A mat 10 is placed on the top of the support device, and the support device has a height l ₃ of about ₃ cm to 20 cm including the substrate 1. Height l
₃ may be selected as necessary according to the thickness of the mat 10.

FIG. 4 is a perspective view showing a state in which the packages P ₁ , P ₂ , P ₃ , ... Are in communication with each other by the branch pipe 5 and the pipe 6 connected thereto.

The structure of each bag and each package (hereinafter, individual bags and individual packages are denoted by reference symbols Bi and Pi, respectively) is shown in FIG. It is as shown in the figure and FIG. 6 which is also a sectional view taken along the line VI-VI. A branch pipe 5 is connected to the side wall of the rubber package Pi, and the branch pipe 5 is connected to the communication pipe 6 shown in FIG. As a material for the package Pi, EPDM, CR, PUR or the like, which has weather resistance and heat resistance to some extent, can be preferably used. Inside the side wall of the package Pi to which the tube 5 connects,
The first porous plate 13 is located, the second porous plate 14 is in contact with the first porous plate 13, and the second porous plate 14 is horizontally positioned with a space between the second porous plates 14. The space 15 is filled with beads 15 of a reversible swelling and contracting substance. Porous plate 13
Is preferably, for example, a soft polyurethane foam having an open cell ratio of 30% or more so that it can follow the vertical movement of the porous plate 14. The porous plate 14 is, for example, Univex S
B (manufactured by Unitika Ltd.) and the like, and has a porosity of 50 Vol%. At the bottom of the bag Bi, a plate-shaped heating element 7 which is sandwiched between the bag Bi and the package Pi and subjected to an insulation coating is provided on the package Pi through a thin plate (which may be a metal thin plate) 16 if necessary. It is attached.

The substance forming the beads 15 absorbs the swelling liquid at or below (or above) the phase transition temperature and swells at a certain temperature (the phase transition temperature determined by the substance), and swells above (or below) the phase transition temperature. It is a reversible swelling and contracting substance that discharges and contracts liquid. The heating element 7 is for heating the beads 15 to the phase transition temperature or higher.

When beads made of a substance that swells below the phase transition temperature and contracts above the phase transition temperature are used, the mechanism of expansion and contraction of the package Pi is as follows. FIGS. 5 and 6 show a state in which the beads 15 are heated to the phase transition temperature or higher by energizing the heating element. From this state, when the energization of the heating element 7 attached to the package Pi is stopped and the energization of the heating elements of the adjacent packages Pi _-1 and Pi ₊₁ is started, the beads 15 spontaneously cool and fall below the phase transition temperature. The package is heated to the next temperature and the tubes 6 and 5 and the porous plate 1
The swelling liquid W is introduced into the package Pi via the arrows 3 and 14 as shown by the arrow in FIG. 5, the introduced swelling liquid W is absorbed and the beads 15 are swollen, whereby the package Pi is expanded. To do. Since the bag Bi that accommodates the package Pi can be expanded and contracted only in the vertical direction as described above, the bag B can be expanded by the expansion of the package Pi.
i expands upward. When the energization to the heating element 7 is restarted and the energization to the adjacent packages Pi ₋₁ and Pi ₊₁ is stopped,
The beads 15 are heated above the phase transition temperature to discharge the swelling liquid W, and the discharged swelling liquid W moves in the opposite direction to the package Pi and exits from the package Pi.
_-1 and P ₊₁ are absorbed into the package Pi and the bag Bi
Contracts to its original size (the size shown in FIG. 5). A filter may be arranged at the package entrance.

FIG. 7A is a graph showing the volume change with temperature T of a substance that swells below the phase transition temperature Tc and contracts above the phase transition temperature Tc. Contrary to the above, FIG. 7B is a graph showing the volume change with temperature T of a substance that swells at a phase transition temperature Tc or higher and contracts at a phase transition temperature or lower. For the prevention of pressure ulcers, a chemical reverse swelling substance having the characteristics shown in FIG. 7A is preferable because it does not cause burns to the sick person. The reason is that in the swollen state, the package is swollen to press the body part of the sick person, and it is safer to keep the temperature inside the package cold in this state.

The reversible swelling substance is such that the initial swelling degree β at the time of charging is 1 <β <α with respect to the swelling degree α in the equilibrium swelling state. The equilibrium swelling state is a swelling state when beads of a specific composition are immersed in a sufficient amount of a swelling liquid around them and kept at a specific temperature T <Tc (in the case of FIG. 7A) for a sufficient time. Say. Where α is V _m / V _o and β is V
/ V _o . Where V _o is the volume of the above material when contracted,
V _m is the volume at the time of equilibrium swelling, and V is the volume at the time of initial swelling at the time of charging. V _m is T <Tc (7th
A) or T> Tc (FIG. 7B), and the volume when swollen when the swelling liquid is sufficient. When β = α, the temperature T
The swelling liquid does not move between the packages above and below c, and when β = 1, there is no movable swelling liquid, which is inconvenient in any case. The relationship between β and α is 1 <β <
It may be appropriately determined based on the relationship of α and in what heating / cooling cycle each package is used.

The reversible swelling substance is preferably spherical beads as described above because it has good responsiveness and is convenient, but it may be crushed or sponge-like. In the case of beads, the response is inversely proportional to the square of its size,
Finer is more preferable. Since the responsiveness of the beads further depends on how the spaces between the porous plates 14 are set,
It may be determined appropriately.

When the diameter of the beads is about 1 mm, the responsiveness of the volume change of each package in the bedsore prevention mat of FIGS. 1 to 6 is on the order of minutes, for example, a dozen minutes. The responsiveness can be controlled by the volume of the reversible swelling / contracting substance, the heat conduction, the resistance of the substance when moving, and the like in addition to the size of the beads.

It is most convenient to use water as the swelling liquid. A substance having the characteristics as shown in FIG. 7A using water as a swelling liquid is a gel composed of water and a three-dimensionally cross-linked polymer, and the following (meth) acrylamide single substance and vinyl ether substance are is there. It should be noted that the (meth) acrylamide copolymer-based substance also includes substances having the characteristics shown in FIG. 7B.

As the (meth) acrylamide single substance, N-mono-substituted acrylamide derivative whose substituents are ethyl, n-propyl, i-propyl and cyclopropyl, N, N-disubstituted acrylamide derivative whose substituents are ethylmethyl and diethyl, There are polymers of N-substituted methacrylamide derivatives such as N-acrylpyrrolidone whose substituent is cyclic, N-acrylpiperidine, n-propyl, i-propyl, and cyclopropyl, and examples of the (meth) acrylamide copolymer-based substance include: Having the above monomer or higher alkyl group (meth)
Monomers that give water-insoluble polymers such as acrylamide derivatives and (meth) acrylic ester derivatives, and acrylamide, N-methylacrylamide, N, N-dimethylacrylamide, methacrylamide, methylacrylamide, ethylmethacrylamide, acrylic acid, and meth. Examples thereof include a copolymer with a monomer that gives a water-soluble polymer such as acrylic acid.

The composition ratio is appropriately determined depending on the temperature and size at which the desired volume change occurs.

Moreover, methyl vinyl ether is mentioned as a vinyl ether type substance.

In addition to the above, JP-A-61-55180 previously disclosed by the applicant
Japanese Patent Laid-Open No. JP-A No. 2003-242242, that is, a polymer obtained by polymerizing a monomer mainly containing an N-substituted (meth) acrylamide derivative in the presence of a crosslinkable monomer and containing no ionizable group Can be used. In addition, it may contain an ionizable group.

The degree of cross-linking is appropriately determined depending on the size of the desired gel volume change.

As a method of crosslinking, in the case of di, trivinyl compound,
N, N'-methylenebisacrylamide, ethylene glycol dimethacrylate, glycerin triacrylate, divinylbenzene and the like are used in an amount of 0.1-10 mol%.

Further, it may be carried out by self-crosslinking during or after the polymerization reaction, or by radiation such as γ-ray irradiation.

As the polymerization method, the monomer mixture may be diluted with a solvent such as water, a lower alcohol, a hydrocarbon or the like, or may be used without being diluted with a polymerization initiator such as a radical generator. However, in obtaining the polymer from the monomer mixture, the solvent, the polymerization initiator and the like are not necessarily important elements, and may be appropriately selected from the conventionally known polymerization means.

The heating element 7 is a PTC whose electric resistance increases as the temperature rises.
(Positive temperature coefficient) The heating element is advantageous for reducing power consumption and in terms of safety. As such a heating element material, barium titanate (TiBaO ₃ ) is used.
Or a mixture of carbon black and a polymer material. The size of the heating element 7 is a plate-like body according to the size of the package, and the length is 90 cm and the width is in the range of several cm to 20 cm and is determined by the number of packages. In this example, the width dimension is 17 cm. This heating element operates at a low voltage, its output is a wattage capable of raising the reversible swelling / contracting substance to a temperature above the phase transition temperature (the wattage is also determined by the frequency of ON / OFF switching), and insulation. It is preferably covered and replaceable for repair.

Next, a situation in which the pressure distribution to the sick person is changed while supporting the sick person in each package will be described with reference to FIG. It should be noted that FIG. 8 shows only a part necessary for expansion and contraction of the package and the bag and a part of the body of a sick person for easy understanding.

Figure 8 is a bag Bl temperature T T of the packages in the ₊₁ Pl ₊₁ <Tc (swollen state), the bag Bl, package Pl in Bl _+2, the temperature T of the Pl ₊₂ is T> Tc state The (contracted state) is shown by a solid line. In this state, the heating elements 7l, 7l ₊₂
Is energized, the interiors of the packages Pl and Pl ₊₂ are contracted, and the energization of the heating element 7l _{+1 of the} package Pl ₊₁ is stopped and the interior is swollen. Therefore, in this state, the bag Bl ₊₁ presses the sick person 11. If this state continues for a long time, pressure ulcers will occur, so when a suitable time has elapsed, the heating element 7l ₊₁ is energized and the heating elements 7l, 7l
Stop energizing ₊₂ . Then, the package Pl ₊₁ changes from T <Tc to T> Tc and the package Pl ₊₁
, Pl ₊₂ changes from T> Tc to T <Tc. Therefore, the package Pl ₊₁ contracts, and the water W moves to the packages Pl and Pl ₊₂ as indicated by the arrow under the load received from the sick person,
The insides of the packages Pl and Pl ₊₂ swell. As a result, each bag contracts (Bl ₊₁ ) or expands (Bl, Bl ₊₂ ) as shown by the solid line to the phantom line, and the package that presses the sick person 11 is B.
Instead of l _{+ 1} , it becomes Bl and Bl _{+ 2} . Due to such a volume change of each package, the pressure distribution received by the sick person is changed by only energizing / stopping each heating element according to a predetermined program without using a special power source, and the occurrence of pressure ulcer is prevented.

The volume change for each package Pi is made as shown in FIG. 9 according to a predetermined program. If necessary, a pressure sensor such as a load cell 17 may be provided on the upper surface of the package Pi.
(A paper gauge may be used), and a temperature sensor such as a thermocouple 18 is attached to the heating element 7 as needed. The pressure and temperature detected by the pressure sensor 17 and the temperature sensor 18 are converted into digital signals by the A / D converter 19, and these signals are sent to the CPU (central processing unit) 20. The CPU 20 compares the data of the ROM (fixed storage device) 21 with the signal from the A / D converter 19 to perform arithmetic processing, and activates the control circuit 22 to energize or de-energize the heating element 7.

Instead of the ROM 21, a P-ROM (writable storage device) 23 or a RAM (memory rewritable storage device) 2
4 can be used and the program can be changed appropriately. Such control can be performed at the hospital or at home according to the user's program. In addition, it is also possible to perform time-sequential control according to the conditions obtained in advance by experiments.

As described above, according to this example, it is possible to change the distribution of the sick person and the pressure received by energizing and stopping energization of the heating element, preventing pressure ulcer generation, and a special power source other than energizing the heater. Since there is no need to use it, there is no cause of noise generation, and besides, the structure is simple and durable, and the manufacturing cost of the device is low.

Although the above example is an example of bedding for pressure ulcer prevention, the same effect can be obtained by applying the present invention to a wheelchair.

Next, specific examples will be described.

A temperature sensitive gel having the phase transition of FIG. 7A was synthesized. This temperature-sensitive gel is an isopropylacrylamide gel as shown in the above-mentioned JP-A-61-55180.

The above temperature-sensitive gel has a thickness t of 7.5 as shown in FIG.
cm, width d 17 cm, length l 90 cm, thin rubber airtight square tube package Pi (i =
1-12) was filled with a porous plate.

FIG. 11 is a sectional view of the package Pi in the bag Bi in the initial state. The thickness of the porous plate 14 is 2 mm.
18 of the above were used in a stacked manner, and the beads 15 of the temperature-sensitive gel were filled in a state of being thinly spread between the porous plates 14. Gauze 31 was applied to the entrance of each open package to prevent the beads 15 of the temperature-sensitive gel from flowing out of the package as the swelling liquid came in and out. Inner diameter
Attach a 10mm, 10cm long vinyl tube to the entrance of the open package, and use a fastener 3 to prevent water leakage.
It was fastened to 2 to form a branch pipe 5. After injecting a swelling liquid (water) through the branch pipe so that the swelling degree β of the gel in the initial state is β = 0.5α (α: equilibrium swelling degree), the branch pipe 5 is connected to the communication pipe 6 (see FIG. 4). ) Was connected. The remaining packages were similarly connected to the communication pipe, and then filled with a swelling liquid so as to prevent air from remaining in the branch pipe and the communication pipe portion and sealed.

FIGS. 12A to 12E are schematic views showing a state in which each package repeats swelling and shrinking during use. In the figure,
Each part constituting the package and the part connecting these packages are omitted.

FIG. 12A shows the initial state, in which each package P _1-
P ₁₂ has the same thickness (7.5 cm). The heat of the even-numbered packages P ₂ , P ₄ , ..., P ₁₂ is caused to generate heat, and the gel temperature exceeds the phase transition point of 35 ° C, so that the packages P ₂ , P ₄ , ... , P ₁₂ starts to shrink, and the swelling liquid discharged from these packages P ₂ , P ₄ , ..., P ₁₂ is an odd-numbered package P ₁ , in which the swelling liquid is kept below the phase transition temperature.
P _3, ........., enter the P _11. When enough time has passed,
Even-numbered packages P ₂ , P ₄ , ………, P ₁₂ shrink,
The odd-numbered packages P ₁ , P ₃ , ..., P ₁₁ expand to reach the state of FIG. 12 (b). At this time, the even-numbered packages P ₂ , P ₄ , ..., P _{12 have} a thickness of 5 cm, and the odd-numbered packages P ₁ , P ₃ , ..., P _{11 have} a thickness of 10 cm.
It has become cm.

Next, the power supply to the heating elements of the even-numbered packages P ₂ , P ₄ , ..., P ₁₂ is stopped, and the odd-numbered packages P ₁ , P ₃ ,
........., energizing the heating element P _11. The odd-numbered packages P ₁ , P ₃ , ..., P ₁₁ start to shrink when the temperature exceeds the phase transition temperature, and the even-numbered packages P ₂ , P ₄ ,
………, the temperature of P ₁₂ is lowered and the swelling liquid is added to the packages P ₁ , P ₃ ,
........, contracts from P ₁₁ , expands, and enters the state shown in FIG. 12D through the state shown in FIG. 12C. In this state, the even-numbered packages P ₂ , P ₄ , ..., P _{12 have} a thickness of 7.5 cm, and the odd-numbered packages P ₁ , P ₃ ,.
The thickness of P ₁₁ is 5 cm.

Then, the package P ₁ of odd-numbered, P _3, ........., the package P ₂ even-numbered stops the power supply to the heating element P _11, P _4, ........., to the heat of the P ₁₂ When the energization is started, the state returns to the state of FIG. 12B via the state of FIG. 12E.

When the above operation is repeated, the package has a structure shown in FIGS. 12 (b), (c), (d), (e), (b), (c), ...
The height continues to change like …….

As described above, in this example, with respect to the height direction of the sleeping patient, it is possible to create a state in which the load supporting portion and the load non-supporting portion alternate with location and time at intervals of 17 cm. The same part of the body can be prevented from being continuously pressed by the bedding, and the pressure sore can be prevented from occurring.

The package connection or structure can be the structure shown in FIG. 13 or 14 in addition to the structure shown in FIG.

FIG. 13 shows an example in which adjacent packages Pi are connected by a pipe 25. Therefore, the tube corresponding to the tube 6 in FIG. 4 is not used. Others are the same as the structure of FIG. Water W
Are supplied to the beads 15 as indicated by the arrow (the same applies to FIG. 11).

In the package shown in FIG. 14, only the horizontal two porous plates 14 in the package Pi shown in FIG. 5 are used.

In each of the above examples, the bag is a plain weave cloth made of polyester yarn and spandex yarn in any of the above examples. good. The expansion / contraction direction may be a direction other than the vertical direction.

F. EFFECTS OF THE INVENTION The present invention provides a plurality of liquid-tight first containers in which a reversible swelling shrinkable substance that swells in one temperature range and shrinks in the other temperature range with a predetermined temperature as a boundary is stretchable. Housed in
A second container that is provided with a liquid conducting section for moving the swelling liquid between these first containers and a heating unit that heats the substance for each of the first containers, and is expandable and contractible only in a predetermined direction. Since the first container is housed, the second container can be expanded and contracted in the predetermined direction only by the movement of the swelling liquid between the first containers by temperature control. Therefore, it is easy to selectively change the plurality of support positions of the supported body, pressure ulcer is surely prevented, and further, there is no factor of noise generation and the operation is quiet. In addition, by using a plurality of first and second containers, the load on each container can be reduced, the container can be used for a long time, and the durability is excellent. Further, since the structure is simple, the manufacturing cost is low in addition to the above durability.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention, in which FIG. 1 is a schematic front view of an essential part showing a state in which a patient is lying on a bedsore prevention mat, and FIG. 2 is a schematic plan view of the same part. 3, FIG. 3 is a partially enlarged view of FIG. 1, FIG. 4 is a perspective view showing the relationship between a plurality of packages and tubes connecting them, and FIG. 5 is a sectional view taken along the line VV of FIG. FIG. 6 is a sectional view taken along line VI-VI in the same manner, FIGS. 7A and 7B are graphs showing the relationship between temperature and volume of the reversible swelling substance, and FIG. 8 is a mechanism for expanding and contracting the bag. FIG. 9 is a block diagram showing the procedure for controlling the expansion and contraction of the package, FIG. 10 is a schematic perspective view showing the dimensions of the package, and FIG. 11 is a sectional view of the package housed in a bag. 12 (a), (b), (c), (d) and (e) show the operation of each package during use. FIG. 13 is a partial sectional view showing a method of connecting a package according to another example, and FIG. 14 is a sectional view of the inside of a package according to still another example. In addition, in the code | symbol shown in drawing, 5,6,25 ... tube 7,7l, 7l ₊ 1,7l _{+ 2} ... heating element 11 ... sick person 13,14 ... porous plate 15 ... reversible swelling Beads of a volatile substance 17 ... Pressure sensor 18 ... Temperature sensor Pi, P ₁ , P ₂ , P ₃ , Pl, Pl ₊₁ and Pl ₊₂ ... Package Bi, B ₁ , B ₂ , B ₃ , Bl, Bl, Bl _{+ 1} , Bl _{+ 2} ... Bag W ... Water (swelling liquid) Tc ... Phase transition temperature.

Claims (1)

[Claims] 1. A reversible swelling / contracting substance which absorbs a swelling liquid and swells in one temperature range with a predetermined temperature as a boundary and discharges the swelling liquid in the other temperature range to contract, and this substance. A plurality of expandable and contractible liquid-tight first containers, a plurality of second containers that contain each of these first containers and are expandable and contractible only in a selected predetermined direction, and the swelling A liquid guiding part for moving the liquid between the first containers, and a heating means for heating the substance for each of the first containers, and by changing the temperature of the substance with the predetermined temperature as a boundary. A pressure ulcer prevention mat configured such that the swelling and contraction of this substance causes the second container to expand and contract in the predetermined direction to change the support position of the supported object supported by the second container.