JP5457926B2 - Grounding member jumping mechanism for welfare equipment and carry cart incorporating the same - Google Patents

Description

  The present invention relates to a grounding member jumping mechanism for welfare equipment having wheels such as a carry cart such as an oxygen cylinder, a walking auxiliary vehicle, a walker, a walking car, a wheelchair, and a stretcher.

  There is an oxygen cylinder carry cart as a welfare device for a patient with respiratory disease to carry an oxygen cylinder when going out. The oxygen cart carry cart is a two-wheeled vehicle in which a pair of left and right wheels are attached to a main body on which an oxygen cylinder is placed, and is provided with one self-supporting stopper so as to be able to stand on its own (for example, (See Patent Document 1 and Patent Document 2).

  A handle is provided on the upper part of the main body. When the user grabs the handle and tilts the oxygen cylinder carry cart forward, the self-supporting stopper can move away from the ground and move two wheels. The user uses the oxygen cylinder carry cart by holding the handle, tilting the oxygen cylinder carry cart forward, and pulling the cart as it is.

JP 2001-247039 A JP 2008-87624 A

  However, the means of transportation used by the user and the terrain of the moving place are various, and the two-wheeled state can be tilted forward, or it can be made independent by three points of two wheels and one self-supporting stopper. It is not always easy to use, and it becomes unusable in some situations. Such problems are not limited to oxygen cart carry carts, but are common to welfare equipment having wheels such as carry carts other than those for oxygen cylinders, walking auxiliary vehicles, walker, walking cars, wheelchairs, stretchers and the like. .

  An object of the present invention is to provide a grounding member jumping mechanism for a welfare apparatus that can easily change the number of grounding members to be grounded according to the situation, and a carry cart incorporating the same.

  In order to achieve such an object, the grounding member jumping mechanism of the welfare device according to claim 1 includes a swinging base swingably attached to the welfare device main body, a grounding member provided on the swinging base, An operation link that is swingably attached to the welfare equipment body, a connection mechanism that connects the operation link and the swing base, and swings the swing base by swinging the operation link, and an operation that swings the operation link The swing base swings between a grounding position where the grounding member is attached to the ground and a flip-up position away from the ground, and the coupling mechanism is provided on either the swing base or the operation link. Is provided on the other of the engagement projection, the swing base and the operation link, and is rotatably engaged with the engagement projection, and the engagement projection is linearly guided as the operation link swings. Engaging recesses, engaging protrusions and engaging recesses Is a thought point where the force transmitted from the swing base to the operation link does not cause a moment for swinging the operation link. They are provided respectively in a positional relationship when the head is swung to the front position and a positional relationship when the head is swung up from the ground contact position or the front position.

  Accordingly, when the operation means is operated to swing the operation link with respect to the welfare equipment body, the swing base swings with respect to the welfare equipment body, and the grounding member is raised and lowered. The engaging convex portion of the connecting mechanism that connects the operation link and the swing base is movable while rotating with respect to the engaging concave portion. Therefore, the rocking base is rocked by the rocking of the operation link by moving the engaging convex part while rotating with respect to the engaging concave part. Here, when the swing base is swung from the ground contact position toward the flip-up position, when the swing base reaches the flip-up position or a position in front of it, the positional relationship between the engaging convex portion and the engaging concave portion is Thus, the force transmitted from the swing base to the operation link becomes a consideration point that does not cause a moment to swing the operation link. Therefore, in a state where the swing base is swung to the flip-up position, the swing base does not swing even when an external force is applied. When the swing base is swung from the flip-up position toward the ground contact position, when the swing base reaches the ground contact position or a position in front of it, the positional relationship between the engagement convex portion and the engagement concave portion is changed. The force transmitted from the dynamic base to the operation link becomes a thought point that does not cause a moment to swing the operation link. Therefore, in a state where the swing base is swung to the grounding position, the swing base does not swing even when an external force is applied.

  The grounding member flip-up mechanism of the welfare equipment according to claim 2 is provided between the welfare equipment main body and the swing base or the operation link, and is attached in a direction to swing the swing base toward the flip-up position. Assist means for generating power is provided. Therefore, the urging force generated by the assist means acts as an auxiliary force when lifting the grounding member from the ground.

  Further, in the grounding member jumping mechanism of the welfare equipment according to claim 3, the welfare equipment body is provided with wheels, and the grounding member is a wheel, and the number of wheels to be grounded is changed by swinging of the swing base. To do. Therefore, when the swing base is swung to the grounding position, both the wheel provided on the welfare equipment body and the wheel provided on the swing base are grounded. On the other hand, when the swing base is swung to the flip-up position, only the grounded wheel is provided on the welfare equipment body.

  In the grounding member jumping mechanism for welfare equipment according to claim 4, the welfare equipment body is provided with wheels, the grounding member is a self-supporting stopper, and the number of grounding points is increased by swinging the swing base. It will change. Therefore, when the swing base is swung to the grounding position, both the wheel provided on the welfare equipment main body and the self-standing stopper provided on the swing base are grounded. On the other hand, when the swing base is swung to the flip-up position, the self-standing stopper on the swing base side is lifted, and only the wheel on the welfare equipment main body side is grounded.

  In the grounding member jumping mechanism for welfare equipment according to claim 5, the welfare equipment main body is provided with a self-standing stopper, the grounding member is a wheel, and the number of grounding points is increased by swinging the swing base. It will change. Therefore, when the swing base is swung to the grounding position, both the self-standing stopper provided on the welfare equipment main body and the wheel provided on the swing base are grounded. On the other hand, when the swing base is swung to the flip-up position, the wheel on the swing base side is lifted and only the self-supporting stopper on the welfare equipment body side is grounded.

  Further, the grounding member jumping mechanism of the welfare equipment according to claim 6 is such that when the operation means is operated by the user's hand, the user operates the upper part of the welfare equipment main body with the foot. In some cases, it is provided at the bottom of the welfare equipment body. Therefore, the operating means can be operated without the user bending his / her body.

  A carry cart according to a seventh aspect incorporates the grounding member flip-up mechanism according to the first aspect.

  In the grounding member jumping mechanism of the welfare equipment according to claim 1, since the swing base can be swung by operating the operating means, the grounding member can be raised and lowered by one operation by operating the operating means. Accordingly, the number of grounding members to be grounded can be easily changed. In addition, since a thought point is provided at the flip-up position of the swing base or the position in front of it and the ground contact position or the position in front of it, the swing base can be swung only by swinging to the jump position or the ground position. The moving base can be automatically locked at that position, which is convenient because there is no need to perform a locking operation.

  In this case, the number of wheels to be grounded may be changed as in the grounding member jumping mechanism of the welfare equipment according to claim 3, and the grounding member jumping mechanism of the welfare equipment according to claim 4 and 5. As described above, the number of grounding points may be changed.

  Further, in the grounding member jumping mechanism for welfare equipment according to claim 2, since the biasing force of the assist means acts as an auxiliary force when lifting the swing base, the grounding member can be lifted with a light force, and the usability is improved. It can be further improved.

  Further, in the grounding member flip-up mechanism of the welfare equipment according to claim 6, when the user operates the operation means by hand, it is placed at the upper part of the welfare equipment body, and when operated by the foot, it is placed at the lower part of the welfare equipment body. Since the operation means is provided, the operation means can be arranged at a position where it can be easily operated in any case. Therefore, usability can be further improved. In particular, when the user is a physically handicapped person or an elderly person, the operation of operating the operation means places a burden on the body. However, in the present invention, the operation means can be arranged at an easy-to-operate position. , Can reduce the burden on the body.

  Further, in the carry cart according to claim 7, since the grounding member jumping mechanism according to claim 1 is incorporated, the number of grounding members to be grounded can be easily switched, and the locked state is automatically locked. can do.

1 shows a first embodiment of a grounding member jumping mechanism for a welfare equipment according to the present invention, and a swinging base, an operation link, and a connection when the swinging base is moved to a grounding position when applied to a carry cart for an oxygen cylinder. It is a figure which shows the positional relationship of a mechanism. 1 shows a first embodiment of a grounding member flip-up mechanism of a welfare equipment according to the present invention, and a swing base, an operation link in a state where the swing base is moved to a flip-up position when applied to a carry cart for an oxygen cylinder, It is a figure which shows the positional relationship of a connection mechanism. 1 shows a first embodiment of a grounding member jumping mechanism for a welfare equipment according to the present invention, and a swinging base in the middle of moving the swinging base from a grounding position to a jumping position when applied to a carry cart for an oxygen cylinder It is a figure which shows the positional relationship of an operation link and a connection mechanism. FIG. 4 is a perspective view showing an example of an oxygen cylinder carry cart to which the grounding member jumping mechanism is applied, in a four-wheel state (a state where the swing base is moved to the grounding position). FIG. 5 is a perspective view of an example of an oxygen cylinder carry cart to which the grounding member flip-up mechanism is applied, in a two-wheel state (a state where the swing base is moved to the flip-up position). It is a disassembled perspective view of the grounding member flip-up mechanism. It is a side view which shows the operation means of the grounding member flip-up mechanism. It is sectional drawing which follows the VIII-VIII line of FIG. 2 shows a second embodiment of the grounding member flip-up mechanism of the welfare equipment of the present invention, and the swinging base, the operation link, and the connection when the swinging base is moved to the grounding position when applied to a carry cart for an oxygen cylinder It is a figure which shows the positional relationship of a mechanism. 2 shows a second embodiment of the grounding member flip-up mechanism of the welfare equipment according to the present invention, and a swing base, an operation link in a state where the swing base is moved to the flip-up position when applied to a carry cart for an oxygen cylinder, It is a figure which shows the positional relationship of a connection mechanism. It is sectional drawing which shows the 2nd guide groove of the grounding member flip-up mechanism. 3 shows a third embodiment of a grounding member jumping mechanism for a welfare equipment according to the present invention, and a swinging base, an operation link, and a connection when the swinging base is moved to a grounding position when applied to a carry cart for an oxygen cylinder. It is a figure which shows the positional relationship of a mechanism. 3 shows a third embodiment of a grounding member jumping mechanism of a welfare equipment according to the present invention, and a swinging base, an operation link, and a swinging base when moved to a flipping-up position when applied to a carry cart for an oxygen cylinder, It is a figure which shows the positional relationship of a connection mechanism. It is sectional drawing which shows 3rd Embodiment of the grounding member flip-up mechanism of the welfare equipment of this invention, and shows the attachment state of the torsion coil spring at the time of applying to the carry cart for oxygen cylinders. It is a perspective view of the four-wheel state at the time of applying 4th Embodiment of the grounding member flip-up mechanism of the welfare equipment of this invention, and applying to a walking vehicle. It is a perspective view of the two-wheel state at the time of applying 4th Embodiment of the grounding member flip-up mechanism of the welfare equipment of this invention, and applying to a walking vehicle.

  Hereinafter, the configuration of the present invention will be described in detail based on the form shown in the drawings.

  FIGS. 1-8 shows an example of embodiment of the grounding member flip-up mechanism of the welfare equipment of this invention. A grounding member flip-up mechanism (hereinafter simply referred to as a grounding member flip-up mechanism) of the welfare equipment includes a swing base 2 that is swingably attached to the welfare equipment main body 1 and a grounding member 3 that is provided on the swing base 2. And an operation link 4 swingably attached to the welfare equipment body 1, a connection mechanism 5 that connects the operation link 4 and the swing base 2, and swings the swing base 2 by swinging of the operation link 4. And an operation means 21 for swinging the operation link 4. In this embodiment, an oxygen cylinder carry cart will be described as an example of the welfare equipment.

  As shown in FIGS. 4 and 5, the welfare equipment (hereinafter referred to as “carry cart for oxygen cylinder”) is a basket 7 for placing an oxygen cylinder (not shown) on a support (hereinafter referred to as “support 1”) constituting the welfare equipment main body 1. A pair of left and right front wheels 8 are attached to the lower part of the column 1. Further, a handle 9 is provided at the upper end of the column 1 to be gripped when the oxygen cylinder carry cart is moved. The support column 1 is composed of, for example, an outer cylinder 1a and an inner cylinder 1b, and the entire support column 1 can be expanded and contracted by pulling out the inner cylinder 1b from the upper end opening of the outer cylinder 1a. A first guide groove 10 is provided on the outer peripheral surface of the outer cylinder 1a along the axial direction. The first guide grooves 10 are provided on both the left and right sides of the outer cylinder 1a.

  In the lower part of the outer cylinder 1a, that is, the position where the inner cylinder 1b is not reached even when stored in the outer cylinder 1a, as shown in FIG. 13 and a first slit 16 through which a connecting shaft 15 that transmits the movement of the operation means 21 to the operation link 4 is provided. The front wheel axle hole 12, the link hole 14, and the first slit 16 are respectively provided on the left and right sides of the outer cylinder 1a. The front wheel axle 11, the support shaft 13, and the connecting shaft 15 are connected to the outer cylinder 1a with oxygen. It penetrates in the width direction of the cylinder carry cart. The front wheel axle hole 12 and the link hole 14 are provided in a portion after the first guide groove 10, and the front wheel axle hole 12 is provided at a position sufficiently lower than the link hole 14. The link 4 is disposed so as not to interfere with the front wheel axle 11. The first slit 16 is provided in the first guide groove 10 and its length corresponds to a range in which the operating means 21 is moved up and down. That is, the operating means 21 can be moved up and down along the first guide groove 10 within a range in which the connecting shaft 15 can move in the first slit 16. The width of the first slit 16 is substantially the same as the diameter of the connecting shaft 15 so that the connecting shaft 15 passing through the first slit 16 does not rattle in the front-rear direction of the oxygen cylinder carry cart. It has become. Front wheels 8 are attached to both ends of the front wheel axle 11.

  The swing base 2 is a strength member that swings between a ground contact position L (position in FIG. 1) where the ground contact member 3 reaches the ground and a flip-up position H (position in FIG. 2) away from the ground. Then, a rear wheel (hereinafter referred to as rear wheel 3) is attached as the grounding member 3. Further, in this embodiment, the swing base 2 is provided on the left and right in order to make the oxygen cart carry cart a four-wheeled vehicle. However, it is not always necessary to provide the swing base 2 on the left and right sides. When the oxygen cylinder carry cart is a three-wheeled vehicle (one rear wheel 3), the left and right rear wheels 3 are mounted on one swing base 2. In the case of attaching a single or the like, only one swing base 2 may be provided. Further, when the number of rear wheels 3 is further increased, the number of swing bases 2 may be further increased.

  In this embodiment, the swing base 2 is formed in a plate shape. However, the swing base 2 is not necessarily formed in a plate shape, and may be formed in a rod shape, a pipe shape, a frame shape, or the like. A front wheel axle hole 2a through which the front wheel axle 11 passes is provided at the front part of the swing base 2, and a rear wheel axle hole 2b through which the rear wheel axle 17 passes through is provided at the rear part. The swing base 2 is formed to have such a length that the rear wheel 3 can be arranged away from the front wheel 8 to the extent that the oxygen cylinder carry cart can be stably supported by four wheels and is not too long to impair usability. ing.

  In the present embodiment, an extension portion 2c that extends obliquely upward is provided at the front portion of the swing base 2, and the distance between the extension portions 2c of the left and right swing bases 2 is maintained constant. A two-wheel self-supporting stopper 18 that also functions as a spacer is provided. This two-wheeled self-supporting stopper 18 is for grounding when the swing base 2 is moved to the flip-up position H to bring the oxygen cylinder carry cart into the two-wheel state, and the oxygen cylinder carry cart is in the two-wheel state. But it has become independent. However, the two-wheel self-supporting stopper 18 is not necessarily required, and the two-wheel self-supporting stopper 18 and the extending portion 2c may be omitted when it is not necessary to be able to stand by itself in the two-wheel state.

  The swing base 2 is disposed between the support 1 and the front wheel 8 and is swingably attached to the support 1 by passing the front wheel axle 11 through the front wheel axle hole 2a. By attaching the swing base 2 and the front wheel 8 to the same shaft in this way, the assembly of the oxygen cylinder carry cart can be facilitated. However, the swing base 2 and the front wheel 8 do not necessarily have to be attached to the same shaft, and may be attached to different shafts arranged on the same axis, or may be attached to different shafts arranged on different shafts. . The range in which the swing base 2 can swing is determined by the connection between the operation link 4 and the connection mechanism 5. In the present embodiment, the collar 19 is sandwiched between the left and right swing bases 2 and the support columns 1 to prevent interference between the left and right swing bases 2 and the support columns 1 and the left and right swing bases 2. A space for arranging the operation link 4 is provided between the column 1 and the column 1. The collar 19 also functions as a bearing for the swing base 2. However, the collar 19 may be omitted.

  One rear wheel axle 17 is passed through the rear wheel axle hole 2 b of the left and right swing bases 2, and the rear wheel 3 is attached to both ends of the rear wheel axle 17. Cylindrical spacers 20 are covered at positions between the left and right swing bases 2 of the rear wheel axle 17, and the distance between the rear portions of the left and right swing bases 2 is maintained constant.

  The operation link 4 is provided for each swing base 2. In this embodiment, since the swing base 2 is provided on the left and right, the operation link 4 is also provided on the left and right. However, it is not necessary to provide the operation link 4 for each swing base 2, and the plurality of swing bases 2 may be swung by one operation link 4.

  The operation link 4 of the present embodiment is substantially L-shaped and is disposed between the support column 1 and the left and right swing bases 2, and the central bent portion passes through the link hole 14 of the outer cylinder 1 a. The support shaft 13 is supported. As a result, the operation link 4 is swingably attached to the column 1. A second slit 4 a through which the connecting shaft 15 is passed is formed in the front portion of the operation link 4. The length of the second slit 4 a is the minimum length that can swing the operation link 4 by the movement of the connecting shaft 15. The width of the second slit 4a is substantially the same as the diameter of the connecting shaft 15 so that the connecting shaft 15 does not rattle. At the rear end of the operation link 4, an engagement convex portion 5 a of the coupling mechanism 5 is provided. The shape of the operation link 4 is not limited to a substantially L shape, and the swing base 2 can be swung between the ground contact position L and the flip-up position H by being operated by the operation means 21 and will be described later. The shape is not particularly limited as long as it is a shape that can provide a thought point. The range in which the operation link 4 can swing is determined by the connection between the connection shaft 15 and the connection mechanism 5.

  The coupling mechanism 5 is provided on one of the swing base 2 and the operation link 4, and on the other of the swing base 2 and the operation link 4. It has an engagement recess 5b that is rotatably engaged and guides the engagement protrusion 5a linearly as the operation link 4 swings. In the present embodiment, the operation link 4 is provided with an engaging convex portion 5a, and the swing base 2 is provided with an engaging concave portion 5b. However, the engaging base 5 a may be provided on the swing base 2, and the engaging recess 5 b may be provided on the operation link 4. The engaging convex portion 5 a is formed at the rear portion of the operation link 4 so as to protrude toward the swing base 2. Further, the engagement recess 5 b is formed in the vicinity of the front wheel axle hole 2 a of the swing base 2. The engagement recess 5b of the present embodiment is a slit having a width that is substantially the same as the diameter of the engagement protrusion 5a, and no rattling occurs when the engagement protrusion 5a is inserted. Is transmitted. However, the engagement recess 5b is not limited to the slit, and may be, for example, a long groove as long as it engages the engagement protrusion 5a so as to be rotatable and linearly movable. The length of the engaging recess 5b is the minimum length that can swing the swing base 2 by the movement of the engaging protrusion 5a.

  The positional relationship between the engaging convex portion 5a and the engaging concave portion 5b is provided with a thought point where the force transmitted from the swing base 2 to the operation link 4 does not cause a moment for swinging the operation link 4. In this embodiment, both ends of the range in which the swing base 2 can swing are considered points. That is, the positional relationship of the connecting mechanism 5 when the swing base 2 is swung to the ground contact position L and the positional relationship of the connecting mechanism 5 when swung to the flip-up position H are the thought points. . By making these positional relationships into consideration, the swing base 2 is not intended even if an external force is applied to the swing base 2 while the swing base 2 is swung to the grounding position L or the flip-up position H. It is possible to prevent the rocking from occurring. That is, the swing base 2 can be locked.

  However, the positional relationship as the thought point is not limited to these, and the front positions at both ends of the range in which the swing base 2 can swing may be set as the thought points. That is, the rocking base 2 is swung to a position before the rocking base 2 is swung from the flip-up position H toward the grounding position L (a position near the grounding position L and passing before reaching the grounding position L). The positional relationship when moved and the position in front of the swinging position H from the ground contact position L toward the flip-up position H (near the jump-up position H and before reaching the jump-up position H) The positional relationship when the position is swung to the position) may be considered as a thought point. In these cases, in order to swing the swing base 2 from the ground contact position L or the flip-up position H, it is necessary to temporarily exceed the thought point, so the swing base 2 is moved to the ground contact position L or the flip-up position H. Even if an external force is applied to the swing base 2 in the swinged state, the swing base 2 can be more reliably prevented from unintentionally swinging.

  In the present embodiment, an operation lever (hereinafter referred to as the operation lever 21) is used as the operation means 21. However, other than the operation lever, for example, an operation button may be used. In the present embodiment, the movement of the operation lever 21 is transmitted to the operation link 4 by the elongated plate-like member 22. However, the means for transmitting the movement of the operation lever 21 is not limited to the plate-like member 22, and for example, a wire, a rod-like member, or the like can be used. In the present embodiment, since the operation links 4 are provided on the left and right, the plate-like members 22 are also provided on the left and right, respectively.

  The operation lever 21 is provided at a position where the user can easily operate. In this embodiment, since it is assumed that the user operates the operation lever 21 with his / her hand, the upper part of the column 1 which is a position where the user can easily operate with his / her hand (a user with a normal physique can reach without bending) The operation lever 21 is provided near the upper end of the outer cylinder 1a. However, the position of the operation lever 21 is not limited to this, and may be provided at, for example, the handle 9, the upper end of the outer cylinder 1b, the upper end of the inner cylinder 1b, or the vicinity thereof. Further, when it is assumed that the operation lever 21 is operated with a foot, for example, the operation lever 21 may be provided at the lower portion of the support column 1. The operation lever 21 is a U-shaped plate material, for example, and is disposed so as to surround the rear half of the outer peripheral surface of the outer cylinder 1a. Both ends of the operation lever 21 are connected to the upper end of the plate-like member 22 by, for example, screws.

  The plate-like member 22 is slidably disposed in the first guide groove 10 of the outer cylinder 1a. The lower end of the plate-like member 22 extends to the vicinity of the lower end of the outer cylinder 1 a, and a hole 22 a through which the connecting shaft 15 is passed is provided at a position facing the first slit 16. The operation link 4 can be swung by operating the operation lever 21 and moving the plate-like member 22 along the first guide groove 10. The operation lever 21 and the plate-like member 22 are movable within a range in which the connecting shaft 15 can move in the first slit 16.

  Next, the operation of the grounding member flip-up mechanism will be described. The left and right operation links 4 and the swing base 2 swing simultaneously by the same amount.

  In the four-wheel state of the oxygen cylinder carry cart shown in FIG. 4, the swing base 2 is lowered to the ground contact position L (FIG. 1). In this state, the operating lever 21 is operated to the lowest position, and the connecting shaft 15 that penetrates the lower part of the plate-like member 22 is lowered to the lowest position in the first slit 16. That is, when the operation lever 21 is operated to the lowest position, the swing base 2 is swung to the ground position L. In the four-wheeled oxygen cylinder carry cart, the column 1 is inclined toward the rear wheel 3 side.

  When the user pulls up the operation lever 21 from this state, the connecting shaft 15 rises in the first slit 16, and the operation link 4 is swung in the direction of lifting the front end around the support shaft 13. At this time, the distance between the connection shaft 15 and the support shaft 13 changes, but this change in distance is absorbed by the movement of the connection shaft 15 in the second slit 4a.

  When the operation link 4 is swung, the engagement convex portion 5a provided at the rear end thereof moves forward, so that the operation link 4 is provided at a position higher than the swing center (front wheel axle 11) of the swing base 2. The engaging recess 5b is also moved forward, and the swing base 2 is swung toward the flip-up position H (FIG. 3). At this time, the distance between the engagement convex portion 5a and the swing center of the swing base 2 changes. This change in distance is absorbed by the engagement convex portion 5a moving while rotating in the engagement concave portion 5b. The

  The rear wheel 3 is lifted by the swing of the swing base 2, and the oxygen cylinder carry cart is in a two-wheel state (FIG. 5). Then, when the swing base 2 is swung to the flip-up position H (FIG. 2), the engagement convex portion 5a and the portion receiving the force from the engagement convex portion 5a of the engagement concave portion 5b are the parts of the swing base 2. Since it becomes a thought point lined up in the swing direction, even if the swing base 2 receiving an external force tries to swing, the operation link 4 cannot be swung, and the swing base 2 cannot swing. That is, the swing base 2 is automatically locked at the flip-up position H. In this state, the two-wheel self-supporting stopper 18 is grounded, and the oxygen cylinder carry cart is self-supporting at the three points of the left and right front wheels 8 and the two-wheel self-supporting stopper 18. In this two-wheeled oxygen cylinder carry cart, the column 1 is set up almost vertically. The user can grab the handle 9 and tilt the oxygen cylinder carry cart backward to separate the two-wheel self-supporting stopper 18 from the ground, and can draw the oxygen cylinder carry cart as it is. In the state where the swing base 2 is lifted to the flip-up position H, the operation lever 21 is lifted to the highest position.

  When the operation lever 21 is lowered from this state, the connecting shaft 15 descends in the first slit 16 and the front end of the operation link 4 is lowered. Since the force transmitted from the operation link 4 side to the swing base 2 side is not considered, the operation link 4 swings in the direction of lowering the front end, and the engagement convex portion 5a and the engagement concave portion 5b are The rocking base 2 is swung toward the ground contact position L by performing a movement opposite to the above movement. As a result, the rear wheel 3 is lowered and the oxygen cart carry cart is in a four-wheel state. When the swing base 2 is swung to the grounding position L, the engagement convex portion 5a and the portion receiving the force from the engagement convex portion 5a of the engagement concave portion 5b are aligned in the swing direction of the swing base 2. Since it becomes a thought point, the operation link 4 cannot be swung even if the swing base 2 that has received external force swings, and the swing base 2 cannot swing. That is, the swing base 2 is automatically locked to the ground position L. In this state, the oxygen cylinder carry cart is self-supporting at the left and right front wheels 8 and the left and right rear wheels 3. The user can grasp the handle 9 and draw the oxygen cylinder carry cart as it is.

  In this way, in the present invention, the swing base 2 can be swung by operating the operation lever 21, so that the rear wheel 3 can be raised and lowered with a single touch. You can easily switch to a car. In addition, by considering the positional relationship of the coupling mechanism 5 when the swing base 2 is moved to the flip-up position H or the ground contact position L, the swing base 2 is automatically set to the flip-up position H or the ground contact position L. Can be locked. For these reasons, the oxygen cart carry cart is very convenient to use.

  Further, since the operation lever 21 is provided at a position where the user can easily operate, the rear wheel 3 can be easily raised and lowered without the user taking an unreasonable posture.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention.

  For example, in the above description, the grounding member 3 is a wheel (rear wheel 3), but is not necessarily limited to a wheel, and may be a self-supporting stopper. That is, a wheel is provided on the support column 1 as a welfare equipment body, and a self-standing stopper as a grounding member 3 is provided on the swing base 2 so that the number of grounding points can be changed by swinging the swing base 2. good. Note that the self-standing stopper 18 and the extending portion 2c are preferably omitted. In the oxygen cylinder carry cart in this case, when swinging, the swing base 2 is swung to the flip-up position H to lift the self-supporting stopper. Make sure that the stopper is grounded.

  In addition, the support 1 as a welfare equipment main body is provided with a self-supporting stopper instead of the wheel, and the swing base 2 is provided with a wheel as the grounding member 3, and the number of grounding points is changed by swinging the swing base 2. You may do it. In the oxygen cylinder carry cart in this case, when swinging, the swing base 2 is swung to the ground position L to ground the wheel, and the column 1 is tilted to lift the self-supporting stopper. Then, when the wheel gets in the way, the swing base 2 is swung to the jumping position H to lift the wheel.

  Moreover, you may provide the assist means 23 which generate | occur | produces the urging | biasing force of the direction which rocks the rocking | fluctuation base 2 toward the flip-up position H. An example of the assist means 23 is shown in FIGS. In the present embodiment, a compression coil spring is used as the assist means 23. However, a spring other than the compression coil spring or other elastic body may be used. In the present embodiment, the assist means 23 is provided for each of the left and right swing bases 2, but the assist means 23 may be provided only for one of the swing bases 2.

  A compression coil spring (hereinafter referred to as compression coil spring 23) as the assist means 23 is attached to a spring receiving mechanism 27, and is provided between the support column 1 and the swing base 2 as a welfare equipment body. The spring receiving mechanism 27 is connected to the swing base 2 by a receiving member 24 fixed to the lower end of the outer cylinder 1 a of the support column 1, a slider 25 provided on the outer cylinder 1 a so as to be movable up and down, and a slider 25. It is comprised from the connection convex part 28 currently made. The compression coil spring 23 is provided between the receiving member 24 and the slider 25. A second guide groove 26 is formed in the rear portion of the outer peripheral surface of the outer cylinder 1a of the support column 1 along the axial direction of the outer cylinder 1a.

  The receiving member 24 is inserted and fixed at the lower end portion of the second guide groove 26, and a protruding portion 24a from the second guide groove 26 is provided with a guide sleeve 29 protruding toward the slider 25, and A guide through hole 24 b is formed in the protruding portion 24 a so as to be continuous with the hole in the guide sleeve 29. The slider 25 is slidably inserted into the second guide groove 26, and the guide 25 inserted into the guide sleeve 29 of the receiving member 24 and the guide through hole 24 b is inserted into the protruding portion 25 a from the second guide groove 26. A rod 30 is attached. The guide rod 30 is provided in parallel to the outer cylinder 1a. The projecting portion 25 a of the slider 25 is formed with a connecting convex portion 28 that is inserted into a long hole 31 provided in the swing base 2. Around the guide rod 30 and the guide sleeve 29, there is a compression coil spring 23 that is sandwiched between the protruding portion 24 a of the receiving member 24 and the protruding portion 25 a of the slider 25 and generates a biasing force in a direction away from the receiving member 24. Is provided.

  In a state where the swing base 2 is moved to the grounding position L, the slider 25 approaches the receiving member 24 and the compression coil spring 23 is compressed. In this state, the swing base 2 is locked by the thought point and is not swung by the urging force of the compression coil spring 23.

  When the swing base 2 is swung from the ground contact position L toward the flip-up position H by the operation of the operation link 4, the slider 25 moves along the second guide groove 26 in a direction away from the receiving member 24. At this time, the slider 25 is pushed forward by the compression coil spring 23. That is, the spring force (biasing force) stored in the compression coil spring 23 acts in the direction of swinging the swing base 2 toward the flip-up position H, and the force with which the user operates the operation lever 21 by this force. Is reduced and operability is improved. When the swing base 2 swings, the distance between the connecting convex portion 28 that moves along the second guide groove 26 and the swing center (front wheel axle 11) of the swing base 2 changes. Is absorbed when the connecting projection 28 moves in the long hole 31.

  On the contrary, when the swing base 2 is swung from the flip-up position H toward the grounding position L, the slider 25 moves along the second guide groove 26 in the direction approaching the receiving member 24, so that the compression coil The spring 23 is compressed and the spring force is stored. In this case, the spring force of the compression coil spring 23 acts in the direction opposite to the direction in which the user operates the operation lever 21, but gravity can be used to swing the swing base 2. Therefore, the force required for the operation does not become extremely large, and the operability is not deteriorated.

  In the above example, the compression coil spring is used as the assist means 23, but the invention is not necessarily limited to the compression coil spring. For example, a torsion coil spring may be used. 12 to 14 show examples of the assist means 23 using a torsion coil spring. Also in this example, a torsion coil spring (hereinafter referred to as torsion coil spring 23) as the assist means 23 is provided between the support column 1 and the swing base 2 as the welfare equipment main body 1.

  The torsion coil spring 23 is arranged coaxially with the swing center axis (front wheel axle 11) of the swing base 2. In this embodiment, the torsion coil spring 23 is incorporated in the collar 19 and is arranged coaxially with the swing center axis of the swing base 2. One end of the torsion coil spring 23 is locked to the outer cylinder 1a, and the other end is locked to the swing base 2.

  In a state where the swing base 2 is moved to the grounding position L, the deformation amount of the torsion coil spring 23 is maximum. In this state, the swing base 2 is locked by the thought point and is not swung by the urging force of the torsion coil spring 23.

  When the swing base 2 is swung from the ground contact position L toward the flip-up position H by the operation by the operation link 4, the deformation amount of the torsion coil spring 23 decreases. That is, the spring force (biasing force) stored in the torsion coil spring 23 acts in the direction of swinging the swing base 2 toward the flip-up position H, and the force with which the user operates the operating lever 21 by this force. Is reduced.

  On the contrary, when the swing base 2 is swung from the flip-up position H toward the grounding position L, the deformation amount of the torsion coil spring 23 increases and the spring force is stored. In this case, the spring force of the torsion coil spring 23 acts in a direction opposite to the direction in which the user operates the operation lever 21, but gravity can be used for swinging the swing base 2. Therefore, the force required for the operation does not become extremely large, and the operability is not deteriorated.

  When the torsion coil spring 23 is used, the spring receiving mechanism 27 required for the compression coil spring 23 described above becomes unnecessary, and the configuration of the assist means 23 can be simplified.

  In the above description, the assist means 23 is provided between the welfare equipment body 1 and the swing base 2, but may be provided between the welfare equipment body 1 and the operation link 4. That is, in the above description, the urging force of the assist means 23 is transmitted to the swing base 2, but may be transmitted to the operation link 4. Similarly, when transmitting to the operation link 4, the operation force when lifting the swing base 2 can be reduced, and the operability can be improved.

  In the above description, the number of wheels to be grounded is switched between 4 wheels and 2 wheels, but the number of wheels to be switched is not limited to this, for example, switching between 3 wheels and 2 wheels, Other wheel numbers may be switched.

  In the above description, the control lever 21 is lifted when the swing base 2 is swung to the flip-up position H, and the control lever 21 is lowered when the swing base 2 is swung to the ground position L. The control lever 21 may be lowered when the swing base 2 is swung to the flip-up position H, and may be lifted when the swing base 2 is swung to the grounding position L.

  In the above description, the grounding member jumping mechanism is applied to the oxygen cart carry cart as the welfare equipment. However, the applicable welfare equipment is not limited to the oxygen cylinder carry cart. Any welfare device having wheels such as a walker, a walking car, a wheelchair, and a stretcher can be applied. Further, the carry cart is not limited to the one for the oxygen cylinder, but can be applied to a carry cart for other items such as drip.

  15 and 16 show an embodiment in which the grounding member jumping mechanism is incorporated in a walking vehicle. In addition, the same code | symbol is attached | subjected to the same structural member as the above-mentioned structural member. A main frame 1d is connected to the lower end of the support frame 1c, and a leg frame 2 to which a front wheel 8 and a rear wheel 3 are attached is connected to the left and right of the main frame 1d. In this embodiment, the support frame 1c and the main frame 1d are the welfare equipment main body 1, and the leg frame 2 is the swing base.

  The operation link 4 is swingably attached to the main frame 1 and is connected to the leg frame 2 by a connecting mechanism 5. When the operation lever 21 is pushed down, the swing base (leg frame) 2 is swung to the ground contact position L as shown in FIG. In this state, the positional relationship between the engaging convex portion 5a and the engaging concave portion 5b of the coupling mechanism 5 is a consideration, and the leg frame 2 is locked.

  When the operation lever 21 is lifted from this state, the operation link 4 swings and swings so as to lift the rear end of the leg frame 2. Then, when the leg frame 2 swings to the flip-up position H shown in FIG. 16, the positional relationship between the engaging convex portion 5a and the engaging concave portion 5b of the coupling mechanism 5 becomes a consideration point, and the leg frame 2 is locked. In this state, the front end of the leg frame 2 and the left and right front wheels 8 are grounded and can stand on their own.

  Also in the case of this walking car, as in the case of the oxygen cart carry cart, the rear wheel 3 can be raised and lowered by operating the operation means 21 with one touch. Can be easily switched. In addition, since a thought point is provided at the flip-up position H and the ground contact position L of the leg frame 2, the leg frame 2 can be brought to that position simply by swinging the leg frame 2 to the flip-up position H or the ground contact position L. Can be locked automatically. Further, since the operation lever 21 is provided at a position where the user can easily operate, the rear wheel 3 can be easily raised and lowered without the user taking an unreasonable posture.

1 prop (welfare equipment body)
2 Swing base 3 Grounding member 4 Operation link 5 Connection mechanism 5a Engagement protrusion 5b Engagement recess 6 Operation means 8 Front wheel (wheel provided on the welfare equipment body)
23 Assist means L Grounding position H Bounce position

Claims (7)

  A swing base swingably attached to the welfare equipment body, a grounding member provided on the swing base, an operation link swingably attached to the welfare equipment body, the operation link and the swing A connecting mechanism for connecting the moving base and swinging the swing base by swinging the operation link; and an operating means for swinging the operation link. The swing base contacts the grounding member on the ground. The coupling mechanism is configured to swing between a ground contact position and a flip-up position away from the ground. The connection mechanism includes an engagement convex portion provided on one of the swing base and the operation link, and the swing An engagement recess is provided on either the moving base or the operation link, is rotatably engaged with the engagement projection, and guides the engagement projection linearly as the operation link swings. The engaging projection and the engagement The positional relationship with the recess has a thought point at which the force transmitted from the swing base to the operation link does not cause a moment for swinging the operation link. Positional relationship when swinging from the flip-up position to the grounding position or a position before it, and positional relationship when swinging from the grounding position to the position or the position before it are respectively provided. A grounding member jumping mechanism for welfare equipment, characterized in that   An assist means is provided between the welfare equipment main body and the swing base or the operation link, and generates an urging force in a direction to swing the swing base toward the flip-up position. The grounding member jumping mechanism for welfare equipment according to claim 1.   2. The welfare device according to claim 1, wherein the welfare device main body is provided with wheels, the grounding member is a wheel, and the number of wheels to be grounded is changed by swinging of the swing base. Grounding member flip-up mechanism.   The welfare equipment according to claim 1, wherein the welfare equipment body is provided with wheels, the grounding member is a self-supporting stopper, and the number of grounding points is changed by swinging of the swing base. Grounding member flip-up mechanism.   The welfare equipment according to claim 1, wherein the welfare equipment body is provided with a self-supporting stopper, the grounding member is a wheel, and the number of grounding points is changed by swinging of the swing base. Grounding member flip-up mechanism.   The operation means is provided at the upper part of the welfare device main body when the user operates by hand, and at the lower part of the welfare device main body when the user operates by foot. The grounding member jumping mechanism of the welfare equipment according to claim 1.   A carry cart incorporating the grounding member flip-up mechanism according to claim 1.

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