JP2014008135A - Auxiliary apparatus for bed transportation and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary apparatus for bed transportation comprising a compact or light-weight travel carriage.SOLUTION: An auxiliary apparatus 1 for bed transportation comprises: a bed height adjustment mechanism 4c for adjusting the height of a bed 4; and a travel carriage 3 provided with a driving wheel 3a. The travel carriage 3 comprises an engaging member 3c which lowers the bed 4 to receive the weight of the bed 4 and to engage with the bed 4.

Description

  The present invention relates to a bed transfer auxiliary device used when a bed is transferred.

  The auxiliary apparatus for carrying a bed described in Patent Document 1 includes a traveling carriage attached to one end of the bed. The traveling carriage has a carriage main body installed under the bed and a hydraulic jack that is lifted from the carriage main body by hydraulic pressure and locked to the bed.

JP-A-10-146364

  However, hydraulic jacks are relatively large and heavy. Therefore, the traveling cart becomes large. Alternatively, the traveling carriage becomes heavy and it is not easy to move the traveling carriage removed from the bed. Therefore, there has been a need for an auxiliary device for transporting a bed having a small or light traveling carriage.

  According to one aspect, the present invention includes a bed height adjustment mechanism that adjusts the height of the bed and a traveling carriage that includes drive wheels. The traveling carriage has an engaging member that receives the load of the bed and engages the bed by lowering the bed.

  Therefore, the traveling carriage is engaged with the bed using the bed height adjusting mechanism. Therefore, it is not necessary to provide the traveling carriage with a hydraulic jack that has been conventionally required to engage with the bed. Thus, the traveling carriage can be made smaller. Alternatively, the traveling carriage can be reduced in weight, whereby the traveling carriage removed from the bed can be moved with a small force.

It is a perspective view of a bed and an auxiliary device. It is a side view of a bed and an auxiliary device when the height of the bed is increased. It is a side view of a bed and an auxiliary device when the height of the bed is lowered. It is a side view of a part of traveling cart and bed. It is a top view of a part of traveling cart and bed. It is a perspective view of the operating device of an auxiliary device. It is a top view of a bed and an auxiliary device when the bed goes straight. It is a top view of a bed and an auxiliary device when the bed is bent and advanced. It is a top view of a bed and an auxiliary device when the bed moves laterally. It is a top view of a bed and an auxiliary device when the bed turns.

  One embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the bed transport auxiliary device 1 is used when a bed 4 is transported by a single nurse 6 or the like.

  The bed 4 includes a bed body 4a, a bed height adjusting mechanism 4c, and a caster 4d as shown in FIGS. The bed body 4a has a frame composed of a plurality of metal pipe members. Boards 4b are erected on the front and rear ends of the bed main body 4a. The mattress 4g is installed on the bed body 4a, and the patient 5 can lie on the mattress 4g.

  The bed height adjusting mechanism 4c has a base 4c1 and a link mechanism 4c2 as shown in FIGS. The link mechanism 4c2 is provided between the four corners of the bed body 4a and the four corners of the base 4c1. The link mechanism 4c2 includes an upper link 4c3 that is rotatably connected to the bed body 4a, and a lower link 4c4 that is rotatably connected to the base 4c1. The upper link 4c3 and the lower link 4c4 are rotatably connected. The bed height adjusting mechanism 4c has a motor 4c5. The aspect of the link mechanism 4c2 changes depending on the output of the motor 4c5, and the height of the bed body 4a is adjusted with respect to the base 4c1.

  The base 4c1 is located below the bed body 4a as shown in FIGS. Casters 4d are attached to the four corners of the base 4c1. The caster 4d has a shaft and wheels. The shaft is attached to the base 4c1 so as to be freely rotatable around a vertical axis. The wheel is rotatably attached to the lower part of the shaft and rotates about a horizontal axis. A brake mechanism for applying a braking force to the casters 4d is provided. A pedal 4e for operating the brake mechanism is attached to the base 4c1 so as to be tiltable.

  As shown in FIG. 1, the bed conveyance auxiliary device 1 includes an operating device 2 and a traveling carriage 3. The controller 2 is attached to one end of the bed 4 in the longitudinal direction. The traveling carriage 3 is attached to the other end of the bed 4 in the longitudinal direction.

  The operating device 2 includes an operating body 2a and a pair of mounting bodies 2b as shown in FIG. The mounting body 2b includes an extending member 2b1, a mounting plate 2b2, and a cam 2b3. As shown in FIG. 1, the extending member 2 b 1 extends above the board 4 b of the bed 4 in the front-rear direction and extends downward from the front-rear end. The attachment plate 2b2 can be attached to the distal end portion of the extending member 2b1 and can come into contact with the board 4b of the bed 4.

  As shown in FIG. 6, the cam 2b3 is rotatably attached to the proximal end portion of the extending member 2b1. The cam 2b3 rotates with respect to the extending member 2b1, and changes the distance from the mounting plate 2b2. Therefore, the operating device 2 is detachably mounted on the board 4b of the bed 4 by the cooperation of the cam 2b3 and the mounting plate 2b2.

  The operating body 2a has a rod shape as shown in FIG. Springs 2e and 2f are provided between the operating body 2a and the mounting body 2b. The springs 2e and 2f are spiral springs. One end of the springs 2e and 2f is attached to the left or right part of the operating body 2a, and the other end is attached to the mounting body 2b. The right sensor 2g is attached to the spring 2e, and the left sensor 2h is attached to the spring 2f. The right sensor 2g and the left sensor 2h are strain gauges or the like that detect the amount of strain of the springs 2e and 2f. The right sensor 2g and the left sensor 2h transmit detection signals corresponding to the magnitude and direction of the force applied to the right part and the left part of the operating body 2a.

  A grip 2c is provided at one end of the operating body 2a as shown in FIG. At the other end, a turning / lateral movement operating member 2d is mounted. The grip 2 c is immovable with respect to the operation body 2 a and is gripped by one hand of the nurse 6. The turning / lateral movement operating member 2d is attached to the operating body 2a so as to be rotatable about the operating body 2a and is held by the other hand of the nurse 6. The turning / lateral movement operating member 2d is biased to an initial position by a biasing member (not shown) and can be rotated in both the front and rear directions with respect to the operating body 2a.

  An operation amount detection sensor 2i is provided in the operation body 2a as shown in FIG. The operation amount detection sensor 2i transmits a signal corresponding to the amount and direction of movement of the turning / lateral movement operation member 2d with respect to the operation body 2a. The operation amount detection sensor 2i is, for example, a potentiometer that detects an angle of the turning / lateral movement operation member 2d with respect to the operation body 2a.

  The operating body 2a is provided with a transmitter 2j as shown in FIG. The transmitter 2j is connected to the right sensor 2g, the left sensor 2h, and the operation amount detection sensor 2i by electric wiring. The transmitter 2j transmits the signal received from the sensors (2g, 2h, 2i) to the traveling carriage 3 wirelessly or by wire.

  The traveling carriage 3 has a carriage body 3b and drive wheels 3a as shown in FIGS. An engagement member 3c and a rotation restricting member 3d for mounting the traveling carriage 3 on the bed 4 are provided on the carriage body 3b. The engaging member 3c is rotatably attached to the lower part of the cart body 3b. The engaging member 3c moves between a storage position indicated by a virtual line in FIG. 2 and a use position indicated by a solid line in FIG. In the retracted position, the engaging member 3c is along the rear surface of the carriage main body 3b.

  As shown in FIG. 4, the engaging member 3c is held substantially horizontally by the stopper 3c5 in the use position. The engaging member 3c has a receiving portion 3c3, a force receiving surface 3c6, and a hook 3c4. The receiving part 3c3 is located on the upper surface of the engaging member 3c, and receives a part of the bed 4 from above. The force receiving surface 3c6 is contacted from above by the bed body 4a and receives the load of the bed 4.

  As shown in FIG. 4, the hook 3c4 extends upward from the end of the engaging member 3c in the use position. The hook 3c4 is adjacent to the rear of a part of the bed body 4a. A cart body 3b is adjacent to the front side of the rear surface of the board 4b. Therefore, the traveling cart 3 is restricted from moving in the front-rear direction with respect to the bed 4 by the engaging member 3c and the cart body 3b.

  The engaging member 3c has a pair of arms 3c1 and a connecting portion 3c6 as shown in FIG. The arm 3c1 is rotatably connected to the left part and the right part of the carriage body 3b. The connecting portion 3c6 connects the ends of the arms 3c1. Therefore, the pair of arms 3c1 rotate integrally with the carriage main body 3b. The hook 3c4 is provided at the end of each arm 3c1.

  As shown in FIG. 1, the rotation restricting member 3d has a pair of pillars 3d1, a pair of hanging portions 3d2, and a connecting portion 3d3. The column 3d1 is attached to the rear portion of the carriage main body 3b so as to be movable up and down. The hanging portion 3d2 extends rearward from the tip of the column 3d1, and can be installed on the upper portion of the board 4b. The connecting portion 3d3 connects the ends of the pair of hanging portions 3d2.

  As shown in FIGS. 2 and 4, a shaft 3f and drive wheels 3a are attached to the lower side of the cart body 3b. The shaft 3f extends downward from the carriage main body 3b and is attached to the carriage main body 3b so as to be rotatable. The cart body 3b is provided with a direction changing source 3h for rotating the shaft 3f. The shaft 3f is supported by the carriage main body 3b or the drive wheel 3a so as to be vertically movable. A spring 3g is provided on the outer periphery of the shaft 3f. The spring 3g holds the distance between the carriage main body 3b and the drive wheel 3a in a variable manner. A drive motor 3e is connected to the drive wheel 3a.

  When the traveling carriage 3 is mounted on the bed 4, first, the bed height adjusting mechanism 4c is operated by the operating device 4f provided on the bed 4 as shown in FIG. Thereby, the height of the bed main body 4a is increased. The engaging member 3c of the traveling carriage 3 is set to the use position, and the engaging member 3c is disposed below the bed main body 4a. The rotation restricting member 3d is made free with respect to the carriage main body 3b and hung on the upper part of the board 4b of the bed 4.

  Next, as shown in FIG. 3, the bed main body 4a is lowered by operating the bed height adjusting mechanism 4c with the operating device 4f. The load of the bed 4 is applied to the engaging member 3c. A clockwise torque is generated in the carriage main body 3b by the force applied to the engaging member 3c. The rotation restricting member 3d is pressed against the bed 4 by the torque, and the rotation of the carriage body 3b is restricted. The spring 3g is deformed, and the load of the bed 4 is applied to the drive wheel 3a.

  The spring 3g is provided with a sensor 3i as shown in FIG. The sensor 3i detects the deformation amount of the spring 3g. Thereby, the sensor 3i can detect the load applied to the driving wheel 3a. The detection signal of the sensor 3i is transmitted to the controller 3j in the cart body 3b. The controller 3j operates an alarm device (not shown) when a predetermined load is applied.

  The alarm emits light or sound when activated. The user stops the operation of the bed height adjusting mechanism 4c at the time of alarm. Thereby, the load applied to the drive wheel 3a can be adjusted to a predetermined size (for example, 60 kg weight). Thus, the force applied between the drive wheel 3a and the installation surface can be sufficiently increased. As a result, the drive wheel 3a can be prevented from sliding with respect to the installation surface. On the other hand, it can also be suppressed that the force applied to the drive wheel 3a becomes too large. As a result, an increase in the rotational resistance of the drive wheel 3a can be suppressed, and an increase in power consumption of the drive motor 3e can be suppressed.

  As shown in FIGS. 2 and 3, the bed main body 4a is lowered, and the engaging member 3c is locked to the bed main body 4a. As a result, the travel cart 3 is restricted from moving relative to the bed 4, and the travel cart 3 is connected to the bed 4. Since the rotation restricting member 3d is free with respect to the carriage main body 3b, the rotation restricting member 3d descends while being locked to the bed main body 4a.

  As shown in FIG. 2, the cart body 3b is provided with a controller 3j, a battery 3k, and an inverter 3m. The battery 3k is detachably mounted on a mounting device provided on the cart body 3b. The inverter 3m converts the direct current (for example, DC 24V) output from the battery 3k into an alternating current (for example, AC 100V) having a desired voltage. The alternating current output from the inverter 3m is supplied to the outlet 3p. The outlet 3p is provided on the upper surface of the cart body 3b. A power cord plug of an electric device such as a bed height adjusting mechanism 4c that is operated with an alternating current is connected to the outlet 3p.

  The controller 3j includes a receiver, a direction control circuit, a running torque control circuit, and a lateral movement / turning control circuit. The receiver receives a signal from the transmitter 2j of the controller 2 wirelessly or by wire. The direction control circuit calculates a force difference applied to the left and right of the controller 2 based on signals from the left sensor 2h and the right sensor 2g. The direction control circuit controls the direction change source 3h according to the magnitude of the force difference and the sign of the force difference to determine the angle of the drive wheel 3a.

  The running torque control circuit obtains the sum of the left and right forces applied to the controller 2 based on signals from the left sensor 2h and the right sensor 2g. The running torque control circuit controls the drive motor 3e by the magnitude of the sum of the forces and the sign of the sum of the forces, and determines the torque and direction to be applied to the drive wheels 3a.

  When the force applied to the right side of the controller 2 is the same as the force applied to the left side, the axle of the drive wheel 3a is orthogonal to the longitudinal direction of the bed 4 as shown in FIG. When the nurse 6 or the like pushes the operating device 2, the bed 4 goes straight, and when the operating device 2 is pulled, the bed 4 recedes straight.

  When the force applied to the right side of the controller 2 is greater than the force applied to the left side, the axle of the drive wheel 3a rotates counterclockwise in FIG. 8 from a position orthogonal to the longitudinal direction of the bed 4 as shown in FIG. To do. When the nurse 6 or the like pushes the bed 4, the bed 4 turns to the left and moves forward. When the force that pulls the left side of the controller 2 is larger than the force that pulls the right side, the bed 4 bends in the right direction and moves backward.

  When the force applied to the left side of the controller 2 is greater than the force applied to the right side, the axle of the drive wheel 3a rotates clockwise in FIG. 8 from a position orthogonal to the longitudinal direction of the bed 4. When the nurse 6 or the like pushes the bed 4, the bed 4 turns to the right and moves forward. When the force pulling the right side of the operating device 2 is larger than the force pulling the left side, the bed 4 bends in the left direction and moves backward.

  The lateral movement / turning control circuit determines whether the turning / lateral movement operation member 2d has been operated based on a signal from the operation amount detection sensor 2i. When the nurse 6 or the like rotates the turning / lateral movement operation member 2d with the right hand as shown in FIGS. 9 and 10, the lateral movement / turning control circuit controls the direction changing source 3h, and the axle of the drive wheel 3a is moved. It becomes substantially parallel to the longitudinal direction of the bed 4.

  Next, the lateral movement / turning control circuit determines an operation direction and an operation amount of the turning / lateral movement operation member 2d based on a signal from the operation amount detection sensor 2i. When the lateral movement / turning control circuit determines that the turning / lateral movement operation member 2d has been operated in the forward direction, the drive wheel 3a is rotated in one direction by the drive motor 3e, and the turning / lateral movement operation member 2d is When it is determined that the operation is performed in the negative direction, the drive wheel 3a is rotated in the direction opposite to the one direction. The lateral movement / turning control circuit determines the torque applied to the drive wheels 3a in proportion to the operation amount of the turning / lateral movement operation member 2d.

  As shown in FIG. 9, when the nurse 6 or the like pushes the bed 4 in the same direction as the traveling carriage 3, the bed 4 moves laterally in one direction orthogonal to the longitudinal direction of the bed 4. As shown in FIG. 10, when the nurse 6 or the like pushes the bed 4 in the direction opposite to the traveling carriage 3, the bed 4 turns on the spot.

  As described above, the bed conveyance auxiliary device 1 includes the bed height adjusting mechanism 4c for adjusting the height of the bed 4 and the traveling carriage 3 including the drive wheels 3a as shown in FIG. The traveling carriage 3 has an engaging member 3 c that receives the load of the bed 4 and engages the bed 4 by lowering the bed 4.

  Accordingly, the traveling carriage 3 is engaged with the bed 4 using the bed height adjusting mechanism 4c. Therefore, it is not necessary to provide the traveling carriage 3 with a hydraulic jack that is conventionally required to engage with the bed 4. Thus, the traveling carriage 3 can be made smaller. Alternatively, the traveling carriage 3 can be reduced in weight, whereby the traveling carriage 3 removed from the bed 4 can be moved with a small force.

  The engagement member 3c has a force receiving surface 3c6 and a hook 3c4 as shown in FIG. A part of the bed 4 is brought into contact with the force receiving surface 3c6. The hook 3 c 4 protrudes upward from the force receiving surface 3 c 6 and restricts the relative movement of the traveling carriage 3 and the bed 4 adjacent to a part of the bed 4. Therefore, the traveling carriage 3 can be engaged with the bed 4 by the hook 3c4 having a simple configuration.

  As shown in FIG. 4, the engaging member 3 c is movably provided on the carriage body of the traveling carriage 3. The engaging member 3c moves between a storage position along the carriage main body 3b and a use position that protrudes from the carriage main body 3b and can receive the load of the bed 4. Therefore, when the traveling carriage 3 is removed from the bed 4, the engaging member 3c can be moved to the storage position. As a result, when the traveling carriage 3 is stored, the engaging member 3c is unlikely to get in the way. When the traveling carriage 3 is engaged with the bed 4, the engaging member 3c can be moved to the use position. Thereby, the engagement member 3c is easy to receive the load of the bed 4 from above.

  As shown in FIG. 3, the engaging member 3c protrudes from the carriage main body 3b of the traveling carriage 3, receives the load of the bed 4, and generates torque in the carriage main body 3b. The traveling carriage 3 has a rotation restricting member 3d that is in contact with the bed 4 and pressed against the bed 4 by torque.

  Therefore, when the bed 4 is lowered and the load of the bed 4 is applied to the engaging member 3c, torque is generated in the cart body 3b. The rotation restricting member 3d is pressed against the bed 4 by the torque, and a reaction force is generated. The engagement member 3c can be strongly engaged with the bed 4 by the reaction force. Thus, the traveling carriage 3 can be strongly engaged with the bed 4 by the rotation restricting member 3d and the engaging member 3c.

  The traveling carriage 3 has a spring 3g as shown in FIG. The spring 3g is provided between the engagement member 3c and the drive wheel 3a and is deformed by receiving the load of the bed 4. Accordingly, the sudden change in the load from the drive wheel 3a to the bed 4 can be reduced by the spring 3g. Thus, the spring 3g functions as a damper of the bed 4 or an impact absorbing member.

  As shown in FIG. 3, the traveling carriage 3 includes a drive motor 3e, a battery 3k, an inverter 3m, and an outlet 3p. The drive motor 3e rotates the drive wheel 3a. The battery 3k supplies a direct current to the drive motor 3e. Inverter 3m converts the direct current from battery 3k into alternating current. The outlet 3p is used for taking out the alternating current of the inverter 3m.

  Therefore, an electrical device can be used by connecting the plug of the electrical device which operates with alternating current to the outlet 3p. For example, the bed height adjusting mechanism 4c and a medical instrument plug can be connected to the outlet 3p. Thereby, the height of the bed 4 can be adjusted even in a place where there is no permanent outlet in the building, and the traveling carriage 3 can be detached from the bed 4. Alternatively, a medical device can be used while transporting the bed 4.

  Although the embodiments of the present invention have been described with reference to the above structure, it will be apparent to those skilled in the art that many alternations, modifications, and changes can be made without departing from the scope of the present invention. Accordingly, aspects of the invention may include all alterations, modifications, and changes that do not depart from the spirit and scope of the appended claims. For example, the form of the present invention is not limited to the special structure, and can be modified as follows.

  The controller 3j may be connected to the bed height adjustment mechanism 4c to control the bed height adjustment mechanism 4c. For example, the controller 3j and the operation device 4f of the bed 4 may be connected by wire or wirelessly. An operation member that transmits a signal to the controller 3j may be provided in the cart body 3b. According to this embodiment, the controller 3j can lower the bed 4 by operating the operation member of the cart body 3b. Therefore, the traveling carriage 3 can be easily engaged with the bed 4.

  The controller 3j may be connected to the bed height adjustment mechanism 4c and may control the bed height adjustment mechanism 4c based on a detection signal from the sensor 3i. Thereby, the controller 3j can adjust the amount of load applied to the driving wheel 3a from the bed 4. As a result, the force applied between the drive wheel 3a and the installation surface can be sufficiently increased, and the drive wheel 3a can be suppressed from sliding with respect to the installation surface. On the other hand, it can be suppressed that the force applied to the drive wheel 3a is too large. Thereby, it can suppress that the rotational resistance of the drive wheel 3a becomes large.

  The controller 3j may adjust the magnitude of torque applied to the drive wheel 3a based on the deformation amount of the spring 3g. Therefore, when the weight of the person on the bed 4 and the bed 4 is heavy, the controller 3j can increase the torque applied to the drive wheels 3a. Thus, the nurse 6 and the like can carry the bed 4 with substantially the same force regardless of the weight of the bed 4 and the like.

  The inverter 3m may convert a direct current and an alternating current bidirectionally. When an alternating current is supplied from the outlet 3p to the inverter 3m, the inverter 3m converts the alternating current into a direct current. The inverter 3m supplies a direct current to the battery 3k, and the battery 3k is charged. This eliminates the need for a device for charging the battery 3k.

  As shown in FIG. 4, the hook 3 c 4 may restrict the forward movement of the traveling carriage 3 relative to the bed 4 adjacent to the rear of a part of the bed 4. Alternatively, the hook 3c4 may be inserted into the groove of the bed 4 so that the hook 3c4 restricts the movement of the traveling carriage 3 in both the front and rear directions.

  As shown in FIG. 2, the engaging member 3c may be rotatably provided on the cart body 3b. Instead of this, the engaging member 3c may be slidably provided on the cart body 3b.

  As shown in FIG. 2, the engaging member 3c may move to a storage position along the carriage body 3b. Instead of this, the engaging member 3c may move to the storage position inserted into the cart body 3b.

  As shown in FIG. 2, the rotation restricting member 3 d may be locked to the upper part of the board 4 b of the bed 4. Instead of this, the rotation restricting member 3 d may be brought into contact with the front surface of the board 4 b of the bed 4.

  As shown in FIG. 4, the spring 3 g may be provided between the carriage main body 3 b and the drive wheel 3 a and deformed depending on the weight of the bed 4. Instead of this, a spring may be provided between the carriage main body 3b and the engaging member 3c, for example, at the base end of the engaging member 3c, and deformed depending on the weight of the bed 4.

  As shown in FIGS. 2 and 3, the bed height adjusting mechanism 4c may adjust the overall height of the bed main body 4a, or may adjust the height of a part of the bed main body 4a.

DESCRIPTION OF SYMBOLS 1 Bed conveyance auxiliary | assistant apparatus 2 Operating machine 3 Traveling trolley 3a Drive wheel 3b Car body 3c Engagement member 3c4 Hook 3c6 Force receiving surface 3d Rotation restriction member 3e Drive motor 3f Shaft 3h Direction change source 3i Sensor 3j Controller 3k Battery 3m Inverter 3p Outlet 4 Bed 4a Bed body 4b Board 4c Adjustment mechanism 4d Caster 4f Operating machine

Claims (9)

An auxiliary device for transporting a bed,
A bed height adjusting mechanism that adjusts the height of the bed, and a traveling carriage including drive wheels,
The traveling carriage is an auxiliary device for carrying a bed having an engaging member that receives the load of the bed by lowering the bed and engages the bed. An auxiliary device for carrying a bed according to claim 1,
The engaging member includes a force receiving surface on which a part of the bed is abutted, and a relative movement between the traveling carriage and the bed that protrudes upward from the force receiving surface and is adjacent to the part of the bed. An auxiliary device for carrying a bed having a hook to be regulated. It is an auxiliary device for bed conveyance according to claim 1 or 2,
The engaging member is movably provided on a carriage main body of the traveling carriage, and is located between a storage position along or inserted into the carriage main body and a use position that protrudes from the carriage main body and can receive the load of the bed. Auxiliary equipment for transporting moving beds. It is an auxiliary device for bed conveyance according to any one of claims 1 to 3,
The engaging member projects from the carriage body of the traveling carriage and receives a load on the bed to generate torque on the carriage body,
The traveling carriage is a bed conveyance auxiliary device having a rotation restricting member that is in contact with the bed and is pressed against the bed by the torque. It is the auxiliary apparatus for bed conveyance as described in any one of Claims 1-4,
The traveling carriage is an auxiliary apparatus for carrying a bed having a controller that is connected to the bed height adjusting mechanism and controls the bed height adjusting mechanism. It is an auxiliary device for bed conveyance according to any one of claims 1 to 5,
The traveling carriage is an auxiliary apparatus for carrying a bed having a spring that is provided between the engagement member and the drive wheel and deforms in response to the load of the bed. It is the auxiliary apparatus for bed conveyance of Claim 6, Comprising:
The traveling carriage includes a sensor that detects the amount of deformation of the spring, and a controller that controls the bed height adjustment mechanism based on a detection signal from the sensor to adjust the amount of load applied to the drive wheels from the bed. A bed transport auxiliary device. An auxiliary device for carrying a bed according to claim 7,
The traveling vehicle includes a drive motor that rotates the drive wheels, a battery that supplies a direct current to the drive motor, an inverter that converts the direct current output from the battery into an alternating current, and an alternating current of the inverter Bed transport auxiliary device with outlet to take out. A method of using an auxiliary device for transporting a bed,
The bed is lowered by a bed height adjustment mechanism provided on the bed, and the bed is installed on the engaging member of the traveling carriage,
A method for using a bed carrying auxiliary device in which the engaging member receives a load of the bed and engages the bed.

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