JP2023177870A - bed - Google Patents

Abstract

To improve comfort of a bed by increasing a rigid feeling of the bed.SOLUTION: A bed includes a support mechanism (49) for allowing a fixing member (55) to support a movable member (50) to be relatively moved with respect to the fixing member (55). In the support member (49), a support body (54) arranged in a member of one of the movable member (50) and the fixing member (55) is supported by a reception part (56) arranged in the other member, an abutment surface (58) of the support body (54) to be abutted to the reception part (56) is formed to have an inclination surface, and also a reception surface (59) which has an inclination surface and to which the abutment surface (58) of the support body (54) is abutted is formed in the reception part (56).SELECTED DRAWING: Figure 6

Description

The present invention relates to a bed having a support mechanism in which a fixed member supports a movable member, such as an elevating mechanism or a reclining mechanism, that is movable relative to a fixed member.

BACKGROUND ART In hospitals, nursing care facilities, and the like, beds are used in which the entire bed on which a recumbent person lies can be raised and lowered, or a portion of the bed (for example, the back part of the recumbent person) can be raised back and forth.

This bed is provided with an elevating mechanism for raising and lowering the bed as a whole, and a raising and lowering mechanism for raising and lowering a part of the bed.

These lifting and lowering mechanisms and raising/lowering mechanisms use a configuration in which a cylindrical support provided on a movable member is supported by a guide with a U-shaped cross section provided on a fixed member (for example, Patent Document 1 reference.).

Japanese Patent Application Publication No. 2004-57437

However, in the conventional bed described above, since the cylindrical support is supported by a guide with a U-shaped cross section, the dimensional accuracy of individual parts such as the support and guide and the ease of assembling the parts are difficult. Taking these into consideration, the opening size of the guide had to be made larger than the external dimension of the support, and a gap was inevitably formed between the support and the guide.

Therefore, in the assembled bed, the gap between the support body and the guide causes the entire bed to wobble, resulting in low rigidity and a risk of loss of sleeping comfort.

Therefore, in the present invention according to claim 1, a fixing member is provided, such as an elevating mechanism for raising and lowering the entire bed on which a recumbent person lies, or a raising and lowering mechanism for partially raising and lowering a part of the bed. In a bed having a support mechanism for supporting a movable member that is movable relative to a fixed member with a fixed member, the support mechanism has a support provided on either the movable member or the fixed member on the other member. The supporting body is supported by a provided receiving part, and the contacting surface of the supporting body that contacts the receiving part is formed in an inclined surface shape, and the receiving part is formed with an inclined receiving surface that the contacting surface of the supporting body contacts. I made it.

Further, in the present invention according to claim 2, in the present invention according to claim 1, a biasing means for biasing the contact surface of the support body toward the receiving surface of the receiving part is provided. .

Further, in the present invention according to claim 3, in the present invention according to claim 2, when the contact surface of the support is urged toward the receiving surface of the receiving part by the urging means, the support is A gap is formed in the urging direction between the receiving part and the receiving part.

Further, the present invention provides the effects described below.

That is, in the present invention, a lifting mechanism for raising and lowering the entire bed on which a person lying on their side or a raising and lowering mechanism for partially raising and lowering a part of the bed is provided. In a bed having a support mechanism for supporting a movable member that is movable on a fixed member, the support mechanism is a support provided on either the movable member or the fixed member and a receiving part provided on the other member. This is because the contact surface of the support body that supports and contacts the receiving portion is formed into an inclined surface shape, and the receiving portion is formed with an inclined receiving surface that the contact surface of the support material contacts. , there is no gap between the contact surface of the support and the receiving surface of the receiving part, and the support does not shake against the receiving part, increasing the rigidity of the bed and improving the comfort of the bed. can be improved.

In particular, when it is decided to provide a biasing means for biasing the contact surface of the support toward the receiving surface of the receiving part, it is possible to ensure that the inclined surface of the support is not affected by the dimensional accuracy of the member. Since the abutting surface of the bed and the receiving surface of the receiving part can be brought into contact with each other, the rigidity of the bed can be further increased, and the comfort of the bed can be improved.

Further, in a case where a gap is formed in the biasing direction between the support and the receiving part while the abutting surface of the support is urged toward the receiving surface of the receiving part by the urging means. In order to prevent the support body and the receiving part from coming into contact in the biasing direction and the contact surface of the inclined support body and the receiving surface of the receiving part not coming into contact with each other, the tip of the support body and Resistance (friction) between the movable member and the receiving portion can be eliminated, wear of the support body can be prevented, and the movable member can be smoothly moved relative to the fixed member.

FIG. 1 is a plan view (a) and a side view (b) showing a bed according to the present invention. A plan view (a) and a side sectional view (b) showing a bed elevating mechanism. A plan view (a) and a side sectional view (b) showing an upper body and lower body raising/lowering mechanism of the bed. FIG. 3 is an enlarged side sectional view showing the upper body lifting mechanism of the bed. FIG. 2 is an enlarged side sectional view showing the lower body lifting mechanism of the bed. An enlarged front sectional view (a) and an enlarged side sectional view (b) showing the support mechanism. FIG. 3 is an enlarged front sectional view showing the support mechanism. An enlarged front sectional view (a) and an enlarged side sectional view (b) showing the support mechanism. FIG. 3 is a schematic explanatory diagram showing a support mechanism.

Below, the specific structure of the bed according to the present invention will be explained with reference to the drawings.

As shown in FIGS. 1 to 3, the bed 1 includes a support base 3 that is removably installed (assembled and separated) on the top of a base 2, and a bed that supports the body of a person lying on the bed on the top of the support base 3. 4 is removably installed (assembled and separated). A lifting mechanism 5 is provided between the base 2 and the support 3 to raise and lower the support 3 (bed 4) as a whole with respect to the base 2. Further, an upper body raising/lowering mechanism 6 is provided between the support base 3 and the bed 4 for partially raising/lowering a part of the bed 4 (upper body side) with respect to the support base 3. A lower body raising/lowering mechanism 7 is provided for partially raising/lowering a part (lower body side) of the bed 4 with respect to the support base 3. Here, for convenience, the foot side (the right side in FIG. 1) of a person lying on the bed 1 will be referred to as the front side, and the head side (the left side in FIG. 1) will be referred to as the rear side.

The base 2 is movable by attaching casters 10, 11 to the lower front and rear ends of a pair of left and right base frames 8, 9 extending in the front-rear direction, and Connecting frames 12 and 13 extending in the left-right direction are attached (fixed) between the parts and between the rear parts.

The support stand 3 has boards (a footboard 16 and a headboard 17) removably attached between the front and rear ends of a pair of left and right support frame frames 14 and 15 extending in the front-rear direction. A connecting frame 18 extending in the left-right direction is attached (fixed) between the intermediate portions of the frames 14 and 15.

The bed 4 includes a buttocks holder 19 that mainly receives the load of the buttocks of the person lying on its side (supports the buttocks of the person lying on its side from below), and a buttock support 19 that mainly receives the load of the upper body of the person lying on its side (above the buttocks). an upper body cradle 20 for supporting the upper body of a person lying on its side from below; and a lower body cradle 20 for mainly receiving the load of the lower body of the person lying on its side (below the buttocks) (supporting the lower body of the person lying on its side from below). It consists of This lower body cradle consists of a thigh cradle 21 that mainly receives the load of the thighs of the person lying down (supports the thighs of the person lying down from below), and a thigh cradle 21 that mainly takes the load of the lower legs of the person lying down (supports the thighs of the person lying down from below). It is divided into a lower leg support 22 for supporting the lower leg from below.

The butt pedestal 19 is horizontally fixed approximately at the upper center of the support 3 (support frames 14, 15).

The upper body cradle 20 has its front end pivotally attached to the upper part of the rear side (behind the buttock cradle 19) of the support 3 (support frame 14, 15) so as to be able to move up and down. It is provided so as to be able to be raised and lowered relative to the butt part pedestal 19. This upper body cradle 20 is supported by the support 3 (support frames 14, 15) by a support mechanism described later, and is attached to the support frames 14, 15 while moving back and forth along the support frames 14, 15. It is designed to rise and fall up and down. The upper body support 20 mainly receives the load from the back (spine) below the shoulders (scapulae) of the person lying on the side. It supports the upper shoulders and head from the shoulders (scapulae) of the recumbent person (supports the upper shoulders and head from below from the shoulders (scapulae) of the recumbent person). ) and a shoulder cradle.

The lower body cradle is pivoted to the rear end of the thigh pedestal 21 on the upper front side of the buttock pedestal 19 of the support 3 (support frame 14, 15) so as to be movable up and down. Thereby, the thigh pedestal 21 can be raised and lowered relative to the support pedestal 3 and the buttock pedestal 19. Further, the lower body cradle is pivotally connected to the front end of the thigh cradle 21 and the rear end of the lower leg cradle 22 so as to be vertically movable. As a result, the lower leg cradle 22 can be raised and lowered together with the thigh cradle 21 with respect to the support 3 and the buttocks cradle 19, and can also be raised and lowered (freely) with respect to the thigh cradle 21. bendable). The lower leg cradle 22 has a rear end that moves together with the front end of the thigh cradle 21, and a front end that moves along the upper surface of the support 3 (support frames 14, 15). There is.

The elevating mechanism 5 has a base-side moving frame 23 that extends in the left-right direction and is movable back and forth along the base frames 8 and 9 installed inside the middle part of the base frames 8 and 9, and also has a support frame 14, A support stand-side moving frame 24 extending in the left-right direction is attached to the inner side between the middle portions of the support stand frames 15 so as to be movable back and forth along the support stand frames 14 and 15. The base-side moving frame 23 and support-side moving frame 24 of the elevating mechanism 5 are supported by base frames 8, 9 and support frames 14, 15, respectively, by a support mechanism described later.

In addition, the elevating mechanism 5 has the lower ends of a pair of left and right cross bars 25, 26 attached to the rear side connecting frame 13 of the base 2 and the base side moving frame 23 with an interval left and right, so as to be able to move up and down. The upper end portions of cross bars 25, 26 are attached to the rear side connecting frame 18 of the support stand 3 and the support side moving frame 24 so as to be vertically movable with an interval left and right. The cross bars 25 and 26 are connected at the center so that they can move up and down.

Further, in the elevating mechanism 5, an actuator 27 is attached between the center portion of the connecting frame 12 on the front side of the base 2 and the center portion of the support side moving frame 24 so as to be vertically movable. The actuator 27 is composed of a motor and a rod, and the motor side (base end side) is attached to the connecting frame 12 so as to be vertically movable, and the rod side (tip side) is attached to the support side moving frame 24. It is installed so that it can move up and down. A protector 28 is provided below the actuator 27 of the lifting mechanism 5 to protect the actuator 27 from below (to protect the actuator 27 from being directly applied to the force from below). The protector 28 is attached to the lower part of the connection frame 12 so as to extend horizontally toward the front.

The elevating mechanism 5 is capable of elevating the support platform 3 (bed 4) up and down with respect to the base 2 by expanding and contracting the rod of the actuator 27. Note that the elevating mechanism 5 is not limited to the above configuration as long as it can move the support platform 3 (bed 4) up and down with respect to the base 2.

The upper body raising/lowering mechanism 6 is provided with a support frame 29 extending in the left-right direction between the rear middle parts of the support frames 14 and 15 and having a central part curved toward the front and downward. Support arms 30, 31 extending upwardly on the front side are attached at intervals on the left and right sides. Between the left and right support arms 30, 31, the base end (front end) of a movable body 32 extending in the front-rear direction is pivotally supported so as to be vertically movable. ), rollers 33 and 34 are rotatably supported on the left and right sides. The left and right rollers 33, 34 are in contact with the lower part of the upper body holder 20 so as to be able to roll along the upper body holder 20. The movable body 32 is supported at the tips of left and right support arms 30, 31 by a support mechanism described later.

In addition, the upper body raising/lowering mechanism 6 includes a support frame 35 that extends in the left-right direction between the rear ends of the support frames 14 and 15, and a support body 36 that extends downward in the center of the support frame 35. ing.

Furthermore, the upper body raising/lowering mechanism 6 has an actuator 37 attached between the front lower part of the support body 36 and the lower midway part of the movable body 32 so as to be vertically movable. The actuator 37 is composed of a motor and a rod, and the motor side (base end side) is attached to the support 36 so that it can move up and down, and the rod side (tip side) is attached to the movable body 32 so that it can move up and down. It is mounted so that it can move freely. A protector 38 is provided below the actuator 37 of the upper body raising/lowering mechanism 6 to protect the actuator 37 from below (to protect the actuator 37 from being directly applied to the force from below). The proximal end of the protector 38 is attached to the front lower part of the support body 36 in a state of being bent forward and upward, and the tip end is attached to the central rear part of the support frame 29.

The upper body raising and lowering mechanism 6 is capable of raising and lowering the upper body cradle 20 up and down with respect to the support base 3, as shown in FIG. 4, by extending and contracting the rod of the actuator 37. . Note that the upper body raising and lowering mechanism 6 is not limited to the above configuration as long as it can raise and lower the upper body cradle 20 up and down with respect to the support base 3.

The lower body activation mechanism 7 has a support frame 39 extending in the left-right direction between the front mid-parts of the support frames 14 and 15, and support arms 40 and 41 extending in the front upward direction at the center of the support frame 39. They are installed at intervals. Between the left and right support arms 40, 41, the base end (rear end) of a movable body 42 extending in the front-rear direction is pivotally supported so as to be vertically movable. ), rollers 43 and 44 are rotatably supported on the left and right sides. The left and right rollers 43, 44 are in contact with the lower part of the thigh pedestal 21 so as to be able to roll along the thigh pedestal 21. The movable body 42 is supported by support arms 40 and 41 by a support mechanism described later.

The lower body raising/lowering mechanism 7 also includes a support frame 45 extending in the left-right direction between the rear sides of the support frames 14 and 15, and a support body 46 extending downward in the center of the support frame 45. It is installed.

Furthermore, the lower body raising/lowering mechanism 7 has an actuator 47 attached between the front lower part of the support body 46 and the lower rear part of the movable body 42 so as to be vertically movable. The actuator 47 is composed of a motor and a rod, and the motor side (base end side) is attached to the support 46 so that it can move up and down, and the rod side (tip side) is attached to the movable body 42 so that it can move up and down. It is mounted so that it can move freely. A protector 48 is provided below the actuator 47 of the lower body raising/lowering mechanism 7 to protect the actuator 47 from below (to protect the actuator 47 from being directly applied to the force from below). The protector 48 is attached to the lower front part of the support body 46 with its proximal end branching upward to the front side and left and right, and the bifurcated tip part is attached to the central rear part of the support frame 39 with the proximal end branching left and right to the left and right. are installed at intervals.

The lower body raising/lowering mechanism 7 expands and contracts the rod of the actuator 47, thereby moving the lower body cradle (thigh pedestal 21 and lower leg pedestal 22) relative to the support base 3, as shown in FIG. can be raised and lowered. Note that the lower body raising and lowering mechanism 7 only needs to be able to raise and lower the lower body cradle (the thigh pedestal 21 and the lower leg cradle 22) up and down with respect to the support base 3, and is limited to the above configuration. It's not a thing.

The bed 1 has the configuration generally described above, and the upper body raising/lowering mechanism 6 includes a movable body that is a member that moves (rotates) relative to the support arms 30, 31 that are fixed members. 32 is rotatably supported by the support arms 30, 31, a support mechanism is provided between the support arms 30, 31 and the movable body 32. In the lower body raising and lowering mechanism 7, the support arms 40, 41 rotatably support the movable body 42, which is a member that is movable (rotatable) relative to the support arms 40, 41, which are fixed members. In order to do this, a support mechanism is provided between the support arms 40, 41 and the movable body 42. In addition, in the upper body raising and lowering mechanism 6, the upper body cradle 20, which is a member that is movable (sliding) relative to the support frames 14, 15, which are fixed members, is slid by the support frames 14, 15. A support mechanism is provided between the support frames 14, 15 and the upper body cradle 20 for possible support. Furthermore, in the elevating mechanism 5, a base-side moving frame 23 and a support base are movable (sliding) members relative to the base frames 8 and 9 and support frames 14 and 15, which are fixed members. In order to slidably support the side moving frame 24 with the base frames 8, 9 and the support frames 14, 15, the base frames 8, 9, the support frames 14, 15 and the base side moving frame 23 and the support A support mechanism is provided between the stand-side moving frame 24 and the support mechanism.

As shown in FIG. 6, the support mechanism 49 for rotatably supporting the movable member relative to the fixed member includes a shaft mounted on the movable member 50 (movable body 32, movable body 42) side. At the same time, a roller-shaped support 54 is attached to the distal end 53 of the shaft body 51, and a support 54 is attached to the fixed member 55 (support arms 30, 31, support arms 40, 41). A receiving part 56 is attached to rotatably receive the. In addition, the support mechanism 49 may fix the shaft body 51 to the rotating movable member 50 and also fix the support body 54 to the shaft body 51, or the shaft body 51 may be rotatably attached to the movable member 50. Alternatively, the support body 54 may be rotatably attached to the shaft body 51.

The shaft body 51 has a support body 54 oriented toward the receiving part 56 along the rotational axis of the support body 54 between a base end 52 attached to the movable member 50 and a distal end part 53 to which the support body 54 is attached. An elastic body is provided as a biasing means 57 for biasing.

The support body 54 has a truncated conical shape in which a contact surface (outer peripheral surface) 58 that contacts the receiving portion 56 is gradually reduced in diameter from the base end to the distal end, and the contact surface 58 is formed in the shape of an inclined surface. There is.

On the other hand, the receiving part 56 has a receiving surface (inner circumferential surface) 59 for receiving the support 54 on the inside, which is a truncated cone whose diameter is gradually reduced from the distal end to the proximal end in the same manner as the contact surface 58 of the support 54. The receiving surface 59 is an inclined surface that is inclined in the same manner as the inclined surface-shaped contact surface 58 of the support body 54. Note that the inclination of the contact surface 58 of the support body 54 and the inclination of the receiving surface 54 of the receiving part 56 are such that when elastically deformed due to the urging by the urging means 57 or the load from the upper surface of the bed 1, the slopes are the same. You may make it so that

As a result, when the support body 54 is properly attached to the receiving part 56, the support mechanism 49 can be supported without forming a gap between the contact surface 58 of the support body 54 and the receiving surface 59 of the receiving part 56. The contact surface 58 of the body 54 can be brought into contact with the receiving surface 59 of the receiving portion 56.

Moreover, since the support mechanism 49 biases the contact surface 58 of the support body 54 toward the receiving surface 59 of the receiving portion 56 by the biasing means 57 provided on the shaft body 51, the support mechanism 49 Even if there are dimensional tolerances between members in the direction of the rotation axis, no gap is formed between the contact surface 58 of the support 54 and the reception surface 59 of the receiving part 56, and the contact surface of the support 54 58 can be brought into good contact (close contact) with the receiving surface 59 of the receiving portion 56.

At this time, in the support mechanism 49, when the support body 54 is biased toward the receiving part 56 by the biasing means 57, a gap is created between the distal end surface 60 of the support body 54 and the bottom surface 61 of the receiving part 56. Letting it be formed.

As a result, the support mechanism 49 prevents the distal end surface 60 of the support body 54 and the bottom surface 61 of the receiving portion 56 from coming into contact and the abutment surface 58 of the support body 54 and the receiving surface 59 of the receiving portion 56 not coming into contact with each other. In addition, it is possible to eliminate resistance (friction) between the tip of the support body 54 and the receiving portion 56, thereby preventing wear of the support body 54 and enabling smooth rotation.

The biasing means 57 only needs to be able to relatively bias the support body 54 toward the receiving portion 56 along the rotational axis of the support body 54, and the biasing means 57 may be configured to bias the support body 54 toward the receiving portion 56 along the rotation axis of the support body 54, such as the support mechanism 49 shown in FIG. The means 57 is not limited to the case where an elastic body is used, and the shaft body 51 is biased toward the receiving portion 56 along the rotational axis of the support body 54, as in the support mechanism 62 shown in FIG. 7(a). A spring may be used, and a shaft support 64 that supports the shaft 51 may be screwed to the movable member 50 so as to be movable back and forth, as in a support mechanism 63 shown in FIG. 7(b). Further, the biasing means 57 is not limited to being provided on the movable member 50 side, but may be provided on the fixed member 55 side.

Note that in the support mechanism 49, the outer circumferential surface of the support body 54 is used as the contact surface 58, but the present invention is not limited to this. If possible, the outer circumferential surface of the shaft body 54 may be formed into an inclined surface shape, and the inner circumferential surface of the support body 54 that contacts the shaft body 54 may be formed into an inclined surface shape.

Further, as shown in FIG. 8, the support mechanism 65 for slidably supporting the movable member relative to the fixed member includes movable members 66 (upper body support 20, base side moving frame 23, A shaft body 51 and a support body 54 similar to those of the support mechanism 49 are attached to the support side movable frame 24), and a support body 54 is attached to the fixed member 67 (support frame 14, 15, base frame 8, 9) side. A receiving part 68 is installed to slidably receive the.

The receiving part 68 has a trapezoidal cross-sectional shape in which the receiving surfaces (upper and lower side surfaces) 69 for receiving the support 54 on the inside are gradually reduced in width from the distal end to the proximal end in the same manner as the contact surface 58 of the support 54. The receiving surface 69 is an inclined surface that is inclined in the same manner as the inclined abutment surface 58 of the support body 54.

Thereby, in the support mechanism 65, the support body 54 provided on the movable member 66 can be slid along the receiving portion 68 extending back and forth.

In this support mechanism 65, similarly to the support mechanisms 49, 62, and 63, when the support body 54 is properly attached to the receiving part 68, there is a gap between the contact surface 58 of the support body 54 and the receiving surface 69 of the receiving part 68. The contact surface 58 of the support body 54 can be brought into contact with the reception surface 69 of the receiving part 68 without forming a gap between the support body 54 and the contact surface 58 of the support body 54. By applying force toward the receiving surface 69 of the portion 68, even if there are dimensional tolerances between members in the direction of the rotational axis of the support 54, the contact surface 58 of the support 54 and the receiving surface 69 of the receiving portion 68 are The contact surface 58 of the support body 54 can be brought into good contact (in close contact) with the receiving surface 69 of the receiving portion 68 without any gap being formed therebetween. At this time, in a state where the support mechanism 65 also urges the support body 54 toward the receiving part 68 by the biasing means 57, a gap is formed between the tip surface 60 of the support body 54 and the bottom surface 70 of the receiving part 68. This prevents the distal end surface 60 of the support body 54 and the bottom surface 70 of the receiving part 68 from coming into contact with each other, thereby preventing the contact surface 58 of the support body 54 and the receiving surface 69 of the receiving part 68 from coming into contact with each other. Furthermore, resistance (friction) between the tip of the support 54 and the receiving portion 68 is eliminated, thereby preventing wear of the support 54 and allowing smooth sliding.

Note that in the support mechanism 65 shown in FIG. 8, the support 54 is formed into a roller shape, with the contact surface 58 of the support 54 having a truncated cone shape whose diameter is gradually reduced from the base end to the distal end. A rectangular slider having the same cross section as that shown in FIG. 8 may be used. In this case, the upper and lower side surfaces of the slider serve as inclined abutment surfaces, and the slider slides without rotating along the receiving surface 69 of the receiving portion 68.

Further, in the support mechanisms 49, 62, 63, 65, the support body 54 is provided on the movable members 50, 66 side, and the receiving portions 56, 68 are provided on the fixed members 55, 67 side, but the invention is not limited to this. , while the support body 54 may be provided on the fixed members 51, 67 side, the receiving portions 56, 68 may be provided on the movable members 50, 66 side. Further, the support mechanisms 49, 62, 63, 65 can be applied to other movable parts of the bed 1.

Furthermore, as schematically shown in FIG. 9(a), the inclination angle α of the contact surface 58 of the support body 54 and the inclination angle β of the receiving surfaces 59, 69 of the receiving parts 56, 68 are not necessarily the same. It is not necessary, and the inclination angle α of the abutting surface 58 of the support 54 may widen slightly due to the elasticity of the receiving portions 56, 68 and the load received by the receiving portions 56, 68. It is preferable that the inclination angle α is the same or smaller than the inclination angle β of the receiving surfaces 59 and 69 of the receiving parts 56 and 68 (α≦β).

Further, the direction of inclination of the contact surface 58 of the support body 54 and the receiving surfaces 59, 69 of the receiving parts 56, 68 is opposite to that in FIG. 9(a), as schematically shown in FIG. 9(b). It may be tilted to In this case, the biasing means 57 biases the support body 54 in the direction of pulling it toward the shaft body 51 side.

As explained above, in the bed 1, there is a lifting mechanism 5 for raising and lowering the entire bed 4 on which a recumbent person lies, and a mechanism for partially raising and lowering a part of the bed 4 (the upper body support 20). Support for supporting movable members 50, 66 that move (rotate, slide, etc.) relative to fixed members 55, 67, such as the raising/lowering mechanism (upper body raising/lowering mechanism 6), by fixed members 55, 67. It has mechanisms 49,62,63,65.

The support mechanisms 49, 62, 63, 65 are movable by means of a support 54 provided on one of the movable members 50, 66 or fixed members 55, 67, and a receiving portion 56, 68 provided on the other member. The contact surface 58 of the support body 54 is gradually reduced in diameter toward the tip, and the contact surface 58 of the support body 54 is in contact with the receiving portions 56, 68. It has a configuration that forms.

Therefore, in the bed 1 having the above structure, when the support body 54 is properly attached to the receiving parts 56, 68, there is no gap between the support body 54 and the receiving parts 59, 69, and even if the bed receives vibration etc. 1 does not wobble, the rigidity of the bed 1 can be increased, and the comfort of the bed 1 can be improved.

Further, the bed 1 is configured to include a biasing means 57 for biasing the support body 54 toward the receiving portions 56 and 68.

Therefore, in the bed 1 having the above configuration, even if there are dimensional tolerances between members in the direction of the rotational axis of the support 54, the contact surface 58 of the support 54 and the receiving surfaces 59, 69 of the receiving parts 56, 68 are The contact surface 58 of the support body 54 can be brought into good contact (close contact) with the receiving surfaces 59, 69 of the receiving parts 56, 68 without any gaps being formed between them. The rigidity of the bed 1 can be increased, and the comfort of the bed 1 can be improved.

Further, in the bed 1, a gap is formed between the tip of the support 54 and the reception parts 56, 68 when the support 54 is urged toward the reception parts 56, 68 by the urging means 57. It is configured as follows.

Therefore, in the bed 1 having the above configuration, it is possible to eliminate the resistance (friction) between the tip of the support body 54 and the receiving parts 56, 68, and prevent wear of the support body 54. , 66 can be smoothly moved relative to the fixed members 55, 67.

1 Bed 2 Base 3 Support stand 4 Bed 5 Elevating mechanism 6 Upper body raising/lowering mechanism 7 Lower body raising/lowering mechanism 8,9 Base frame
10,11 Caster 12,13 Connecting frame
14,15 Support frame 16 Footboard
17 Headboard 18 Connecting frame
19 Buttocks cradle 20 Upper body cradle
21 Thigh cradle 22 Lower leg cradle
23 Base side moving frame 24 Support side moving frame
25,26 Crossbar 27 Actuator
28 Protector 29 Support frame
30,31 Support arm 32 Movable body
33,34 Roller 35 Support frame
36 Support 37 Actuator
38 Protector 39 Support frame
40,41 Support arm 42 Movable body
43,44 Roller 45 Support frame
46 Support 47 Actuator
48 Protector 49,62,63,65 Support mechanism
50,66 Movable member 51 Shaft body
52 Proximal end 53 Distal end
54 Support 55,67 Fixing member
56,68 Receiving part 57 Biasing means
58 Contact surface 59,69 Reception surface
60 Tip surface 61,70 Bottom surface
64 Axial support

Claims (3)

A movable member that moves relative to a fixed member, such as an elevating mechanism for raising and lowering the entire bed on which a recumbent person lies, and a raising and lowering mechanism for partially raising and lowering a part of the bed. In a bed having a support mechanism for supporting with a fixed member,
The support mechanism is
A support provided on either the movable member or the fixed member is supported by a receiving portion provided on the other member,
1. A bed characterized in that a contact surface of a support that abuts on a receiving portion is formed in an inclined surface shape, and a receiving surface that is in the shape of an inclined surface that the contact surface of the support comes into contact with is formed on the receiving portion. The bed according to claim 1, further comprising biasing means for biasing the contact surface of the support body toward the receiving surface of the receiving portion. A gap is formed in the urging direction between the support and the receiving part in a state in which the abutting surface of the support is urged toward the receiving surface of the receiving part by the urging means. The bed according to claim 2.

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