JP2009161162A - Movable carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable carriage such as a cart, a wheelchair, and a baby-carriage, which is reformed so as to facilitate the start of movement thereof, and to prevent riding over level-different road, crossing over a partition line, and lateral slipping that hinders straight traveling on the tilted ground. <P>SOLUTION: The movable carriage 100 is provided with a pair of the front wheels 7, 9, and rear wheels 11, 13 on the reverse surface of a carriage plate 1. Connection sections 7A, 9A, 11A, 13A are formed in the front and rear parts inside the front and rear wheels of the carriage plate, and rotating members 15, 17 are mounted rotatably thereto. Wheels 22 (23) are fitted on the lower part of the coupling section of the rotating members. The rotating members in the front and rear are coupled to a rotatable linking member 27. The linking member 27 is connected to an operation lever 40 so that the operation thereof causes the rotating members to rotate, thereby putting the wheels in the state of being afloat/grounded. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to, for example, a carriage for transferring luggage, a wheelchair for moving a handicapped person, a stroller, etc., and a movable carriage in which a front wheel or a rear wheel or both front and rear wheels can swing freely. Further, the present invention relates to an improved one that makes it possible to easily step on a road, cross over a wiring, cross over a groove, and prevent a side slip that impedes straightness on an inclined land.

  For example, a moving cart in which the front or rear side of a wheel such as a baggage transfer cart, a wheelchair for moving a handicapped person, a stroller, etc., and both front and rear wheels are swingable has been provided. These mobile trolleys are gripped by the operator or caregiver at the rear of the mobile trolley and pushed in the direction they want to move, and the direction change is easy to swing. There is usability that can be changed. However, if there is a step on the floor or road surface, pull the handle forward to float the front wheel side of the carriage, then push the handle to advance the moving carriage, lift the rear wheel side higher than the step by operating the handle again, and then handle the handle Press to move the moving carriage completely up to the higher level.

  There have been proposed trolleys, wheelchairs, etc., which are mobile trolleys that can easily overcome the steps. As an example, when a vehicle (cart, wheelchair, etc.) encounters a step, it can be easily ridden, and the configuration is such that the auxiliary wheel 6 is attached to the rotating member 5 that is rotatably attached to the back surface of the base plate 1. Attached to the floor in a non-grounded state, a rear wheel 3b is attached, a rotatable handle attachment 12 is attached to the rear end of the base plate 1, and the rotation member 5 and the handle attachment 12 are freely rotatable. The connecting members 13 are connected. The operation is carried out by holding down the handle 8 in the downward direction, and the base plate 1 is lifted through the handle mounting tool 12, the connecting member 13 and the rotating member 5, and in this state, when pressed in the step direction, the front wheel 3a and the auxiliary wheel are operated. 6 gets on the step. This time, the vehicle can ride on the step by lifting the handle and placing the rear wheel 3b on the step (see, for example, Patent Document 1).

  As another example, there is a caster coupling device that can form a transport device that can easily and comfortably get over a step with a simple structure by being attached to the transport device. The structure includes a main body frame attaching portion 2 attached to the main body frame 8, a caster attaching portion 3 to which a caster 9 is attached, and a hinge portion 4 that rotatably connects the main body frame attaching portion 2 and the caster attaching portion 3. And a return spring 5 that urges the main body frame mounting portion 2 and the caster mounting portion 3 to be small in angle (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 9-123916 (published on May 13, 1997) JP 2007-230542 A (published on September 13, 2007)

  According to the structure of the conventional caster coupling device of a vehicle (cart, wheelchair, etc.), the following problems are pointed out, although the merit of being able to easily and comfortably get over the steps is demonstrated. First, when carrying a heavy object, there is a problem that smooth movement cannot be started due to the resistance of the wheels. For example, in a foundry or the like, when a cast work is transported by a bogie, transportation between each machine tool must be changed in the traveling direction while turning sharply in a narrow passage. It is in a situation where a type equipped with freely swingable wheels is used. In such a field, the cart provided with four freely swingable wheels can be directly conveyed in the front-rear and left-right directions, and can also turn on the spot. However, when carrying heavy work, each caster does not know which direction it is facing, and if it is not directed in the direction of travel, it requires a large pushing force at the beginning of movement, imposes heavy labor, There is a problem that could result in a serious accident that could cause a slip. Note that the problem of starting movement during the movement of this heavy object is not limited to the case of four-wheel universal wheels, but also applies to a movable carriage having front wheels or rear wheels as free wheels.

  In addition, for example, when the wiring cover attached to the floor surface in the factory is exceeded, the wiring is stepped on, and there is a possibility of causing troubles of equipment in the factory or a cause of electric shock by damaging the wiring. In addition, when crossing a slope, the handle is taken to the low side, making it difficult to move straight forward, and sometimes causing a dangerous situation due to the phenomenon of advancing to the low side. is there. In addition, even if you get over the road step, many of the above-mentioned wheel coupling devices are limited to mounting on one side only on the front wheel side, so you have to lift the rear wheel side when the rear wheel gets over the step. The problem remains. In addition, there is a problem that the front wheels and the rear wheels must be lifted by human power and passed over the grooves formed on the road surface.

  The present invention has been made based on these points, and an object of the present invention is to provide a mobile trolley that enables quick movement even when a heavy object is mounted. In addition to the above object, another object is to provide a moving carriage that can prevent a skid that hinders the climbing of a step, over the wiring in a factory, over a groove, and further, on a sloping ground.

  In order to achieve the above object, a mobile carriage according to claim 1 of the present invention comprises a base plate provided with a handle for manual operation, front wheels and rear wheels attached to the bottom four sides of the base plate, and a bottom center of the base plate. A pair of rotating members connected to the front and rear of the base plate so that the bottom of the base plate can be rotated in the traveling direction of the carriage, and the rotation of the rotating member provided on the distal end side of the rotating member The wheel is mounted so as to be movable from the floating state to the grounded state, the connecting member connected to the front and rear rotating members, and the pivotally connected to the one end of the base plate so as to be rotatable. Extend the arm with a long distance from the center upward, and use the tip side as the operating part. Extend the arm with a short distance from the center of rotation downward, and connect the tip side with the connecting member via the transmission member. Direction and stand to move the wheel to the side where the wheels touch the floor And an operation lever that pushes up the carriage by causing the wheel to act on the floor surface by operating the operation unit in the operation direction described above when the operation unit is in a starting state and the operation unit is in a starting state. It is characterized by comprising.

  The movable carriage according to claim 2 is the movable carriage according to claim 1, wherein an auxiliary wheel is attached at a position higher than the above-mentioned wheels on the front side in the traveling direction of the rotation member, and the rotation member is rotated by operating the operation lever. The wheel and the auxiliary wheel can be switched from the floating state to the grounded state of the wheel, and further to the grounded state of the auxiliary wheel.

  The movable carriage according to claim 3 is the movable carriage according to claim 1 or 2, wherein an urging means is attached between the base plate and the connecting member to maintain the floating state of the wheels. It is.

  According to a fourth aspect of the present invention, there is provided the movable carriage according to the second or third aspect, wherein the operation lever is provided with a locking and fixing means, and the wheels and auxiliary wheels provided in the respective rotating members are brought into a grounding state from a floating state of the wheels and auxiliary wheels. The auxiliary wheel is held in a grounded state.

  According to a fifth aspect of the present invention, there is provided the movable carriage according to any one of the first to fourth aspects, wherein one of the front wheels and the rear wheels is a fixed wheel and the other is a free wheel.

  The movable carriage according to claim 6 is the movable carriage according to any one of claims 1 to 4, wherein the front wheels and the rear wheels are free wheels.

  The mobile cart according to claim 7 is the mobile cart according to any one of claims 1 to 6, characterized in that the mobile cart is a cart for transferring goods.

  The mobile carriage according to claim 8 is the mobile carriage according to any one of claims 1 to 6, wherein the mobile carriage is a wheelchair.

  According to a ninth aspect of the present invention, there is provided the movable carriage according to any one of the first to sixth aspects, wherein the movable carriage is a stroller.

That is, in the case of the movable carriage of the present invention, for example, a light movement can be started even when a heavy load is conveyed in a four-wheeled universal carriage.
When transporting heavy loads on a two-wheeled or four-wheeled movable carriage, when the carriage is started, the operation lever is turned to the front side of the carriage, and each turning member is turned to the rear side of the carriage to move the wheel. Is grounded to the floor and pushes up the carriage. As a result, the front and rear wheels directed in the traveling direction support the moving carriage, and even a carriage loaded with a heavy object with a weak pressing force can be started to run lightly.

  The principle will be described. An operation lever is pivotally connected with one end of the base plate as a rotation center, and an arm having a long distance from the rotation center is extended upward. Is extended downward and the tip end side is connected to the connecting member via the transmission member, so that the rotating member can be pushed up to the grounding surface side with a large pressing force by a small operating force of the operating lever, By lifting up, the load applied to all front wheels and rear wheels becomes close to zero. Then, when the front wheel or the rear wheel, which is a free wheel, starts to run, the cart rotates in the direction of travel, and the frictional resistance at that time can be reduced. In addition, the operating lever is mounted so that the direction in which the wheel is operated to the side where the wheel contacts the floor and the traveling direction of the carriage almost coincide with each other, so that the force pushing the operating lever moves the carriage in the traveling direction. It coincides with the pushing force and can start running lightly with less force.

  In addition, it is possible to climb up steps on floors and roads, cross over wiring, and ensure straightness on slopes, and transfer work can be performed efficiently and without hindrance. First, when traveling on a flat floor surface or road surface, each rotating member is rotated to the front side by an operation lever or urging means, and the wheels and auxiliary wheels are held in a non-grounded state where the wheels and auxiliary wheels are floated from the floor surface. In this state, the movable carriage is pushed and transferred.

  Further, when the vehicle travels straight on an obliquely inclined road surface, each of the rotating members is rotated rearward by the operation lever, and the wheel is held in contact with the road surface. In this state, in a two-wheel or four-wheel universal wheel truck, the front and rear wheels are grounded to the road surface in the direction of travel, so that the acting force of skidding to the lower side of the inclined surface during travel is suppressed. , Straightness is ensured.

  Subsequently, when there is a high step on the front of the road surface, the vehicle is traveling in a non-grounded state where the wheels and auxiliary wheels are lifted from the floor surface, or each rotating member is rotated rearward by the operation lever and the wheels are grounded to the road surface. Is done. Here, when the wheel on the front side of the base plate hits the step, each rotating member is further rotated to the rear side by the operation lever, and the wheel and the wheel are moved from the low road surface while the auxiliary wheel is grounded to the road surface on the higher step side. Lift and lift. While pushing the base plate in this state, return each rotating member to the front side with the operating lever and again with the wheel and auxiliary wheel floating from the floor surface or in the state where the rear wheel on the base plate is grounded to the road surface When this wheel hits the step, each rotating member is rotated to the rear side by the operation lever, and the wheel and the rear wheel are lifted and lifted from the low road surface while the auxiliary wheel is grounded to the road surface on the higher step side.

  In this state, the front and rear four wheels move to the higher step side. Here, each rotating member is rotated to the front side again by the operation lever, the wheels and the auxiliary wheels are lifted from the road surface, the four wheels are grounded, and the base plate is pushed forward to run. Note that the step down action from the high road surface to the low road surface is also performed by the operation lever. Further, even in the case of a wide groove, the wheel and the auxiliary wheel can be easily passed by being grounded by the same operation as the above step difference.

  In addition, the over-wiring in the factory is not as high as the above step, so first, when the wheel approaches the wiring, each rotating member is rotated to the rear side by the operation lever, and the wheel is grounded to the floor on the near side of the wiring. Is done. Subsequently, each rotating member is further rotated rearward by the operation lever, and the auxiliary wheel and the front wheel are levitated and are grounded across the front side of the wiring. Thereafter, the base plate is pushed forward, and when the rear wheel approaches the wiring, the same operation as that of the front wheel is performed, the rear wheel is lifted and grounded across the front side of the wiring.

  According to the mobile carriage of the present invention, if it is applied to a carriage that transports various kinds of luggage, for example, a light movement can be started even when a heavy luggage is conveyed in a four-wheeled universal carriage. In addition, it is possible to climb over and down steps on floors and roads, cross over wiring and over grooves in the factory. In addition, it is possible to ensure straightness on slopes. Therefore, the transfer work is performed efficiently. And in wheelchairs and strollers, the same effect can be obtained, so that it can be safely driven on various roads.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of a carriage 101 according to the present embodiment as seen from the bottom, FIG. 2 is a perspective view of the carriage 101 as seen from the rear, FIGS. 3 to 4 are side views of the carriage 101, and FIG. It is an effect | action figure which shows the linearity of a ring | wheel.

  As shown in FIG. 1 and FIG. 2, a cargo transfer cart 101 as an example of the mobile cart 100 of the present invention has a forward folding and an upright posture at the rear portion of the upper surface of the main plate 1. A holding handle 10 is equipped with left and right supports 3, 5. On the back surface of the base plate 1, a pair of front wheels 7 and 9 and a pair of rear wheels 11 and 13 are bolted by mounting plates (connecting portions) 7A, 9A, 11A and 13A at the front and rear left and right positions. . The front wheels 7 and 9 and the rear wheels 11 and 13 are swingable types, but at least the front or rear wheels may be swingable. On the inner side (intermediate position) of the front wheels 7 and 9 and the rear wheels 11 and 13 of the base plate 1, support plates 15 and 17 having a U-shaped cross section fixed to the back surface of the base plate 1 are supported by support bolts 20 and 21 in the front-rear direction. Are provided with rotatable members 15 and 17, respectively. Each of the rotating members has a substantially rectangular shape, and is provided with a wheel 22 (23) on the lower protrusion 15A (17A). The wheel 22 (23) is connected by a connecting member 27 whose fulcrum is in the vicinity of the axle of the wheel 22 (23). Thus, as shown in FIG. 3, the wheels 22 (23) are levitated from the front wheels 7, 9 and the rear wheels 11, 13 with the wheels 22 (23) in contact with the ground in a state where the rotating members 15, 17 are fully turned to the front side. It is set as the related position (flying position A1) of the non-grounding state. Further, as shown in FIG. 4, the rotating members 15 and 17 are rotated rearward so that the wheels 22 (23) are in contact with the ground and coincide with the front wheels 7 and 9 and the rear wheels 11 and 13 (lower side). The wheel 22 (23) is set to have a radial length from the support bolts 20 and 21 so as to be in the ground contact position A2).

  As shown in FIGS. 1 and 3, an operation lever 40 for operating the connecting member 27 is provided at the rear portion of the base plate 1. First, two seat plates 30 protruding rearward of the base plate 1 are attached. Bearing bodies 31 and 32 are provided on the left and right sides of the seat plate 30, an operation rod 34 is provided at the right end of an operation shaft (rotation center) 33 pivotally supported by the bearing bodies 31, and a lower end of an operation piece 35 provided in the middle part. The transmission member 36 is connected to the rear end portion of the connecting member 27. Thus, by operating the operating rod 34 of the operating lever 40, the rotating members 15 and 17 can be switched to the respective positions. In addition, a coil spring as an urging means 50 is provided between the connecting member 27 and the base plate 1 so as to hold the wheels 22 (23) of the rotating members 15 and 17 at a related position (the floating position A1) in a non-grounding state. Is stretched. Although the position of the operation shaft (rotation center) 33 is the upper part of the base plate 1, the position is not limited to this and may be provided on the same surface as the base plate 1 or the lower part of the base plate 1.

  That is, the carriage 101 includes a base plate 1 having a manual handle 10, front wheels 7 and 9 and rear wheels 11 and 13 attached to the bottom four sides of the base plate 1, and a center of the bottom portion of the base plate 1. A pair of rotating members 15 and 17 that are connected back and forth so as to be rotatable in the traveling direction (one direction) of the carriage 101 with the bottom of the base plate 1 as the rotation center, and the tips of the rotating members 15 and 17 Wheels 22 and 23 which are provided on the side of the vehicle and are movably mounted from the floating state to the ground state by the rotation of the rotation member, the connection member 27 connected to the front and rear rotation members 15 and 17, and the platform An arm (operating rod) 34 that is rotatably connected with the one end portion side of the plate 1 as a rotation center is extended upward, and the tip end side is used as an operation portion with a distance from the rotation center. The short arm (operation piece) 35 is extended downward and its tip side When the operation unit is connected to the connection member 27 via the transmission member 36 so that the direction in which the operation unit is operated to the side where the wheel contacts the floor and the traveling direction of the carriage 101 substantially coincides, and the operation unit is in the initial state. Is composed of an operating lever 40 that lifts the carriage by causing the wheels 22 and 23 to act on the floor U by moving the operating portions in the above-mentioned operating direction with the wheels 22 and 23 in a floating state. The positional relationship between the operating lever 40 and the rotating members 15 and 17 is that the operating lever 40 is at the start position inclined backward in the pre-operation state shown in FIG. And the wheels 22 and 23 are in a position where they are lifted H. In the post-operation state shown in FIG. 4, the operation lever 40 is in a substantially vertical position, whereas the rotating members 15 and 17 are in a vertically lowermost point or slightly in front of the wheel. 22 and 23 are set to be in a position where they are grounded and the base plate 1 is slightly pushed up.

  The operation will be described based on the above configuration. First, the operation of reducing the starting force when a heavy load is loaded on the cart 101 will be described with reference to FIGS. When the carriage 101 is activated, the operation lever 40 is turned to the front side of the carriage, the rotating members 15 and 17 are turned to the rear side of the carriage, and the wheels 22 (23) are grounded to the floor U and pushed up. To do. As a result, the front and rear wheels 22 and 23 directed in the traveling direction S support the carriage 101, and the load on the four-wheeled universal wheels 7, 9, 11, and 13 is greatly reduced. As a result, as shown in FIG. 5A, even if the four-wheel universal wheels 7, 9, 11, and 13 are not directed in the traveling direction S, the carriage 101 can start to travel lightly with a weak pressing force F. Once the vehicle starts traveling, the four-wheeled universal wheels 7, 9, 11, and 13 are directed in the traveling direction as shown in FIG. 5 (b).

  The relationship between the operation lever 40 and the rotation members 15 and 17 will be described in more detail. The operation lever 40 is connected so as to be rotatable about one end of the base plate 1 as a rotation center, and an arm having a long distance from the rotation center. 34 is extended upward, the distal end side thereof is used as the operation portion, the arm 35 having a short distance from the rotation center is extended downward, and the distal end portion side thereof is connected to the connecting member 27 via the transmission member 36. The rotating members 15 and 17 can be pushed up to the ground contact surface side with a large pressing force by a small operating force of the operating lever 40, and all the front wheels 7 and 9 and the rear wheels 11 and 13 are lifted by lifting the carriage 101. The load applied to is close to zero.

  For example, in the present embodiment, the lever ratio between the long arm 34 and the short arm 35 is set to about 10. As a result, when the operation unit is pushed forward with a force of about 3 kilograms (the stroke is about 600 millimeters), the force for pulling the connecting member 27 via the transmission member 36 is about 30 kilograms, and the rotating member 15 is almost with this force. , 17 are rotated backward. At this time, the grounded wheels 22 and 23 rotate to push the carriage 101 with a force of about 60 kilograms (stroke is about 15 millimeters). Thus, a load of about 120 kilograms on the base plate 1 is pushed up, and the carriage 101 can be moved lightly.

  As shown in FIG. 5, the front wheels 7 and 9 or the rear wheels 11 and 13, which are free wheels, rotate in the traveling direction when the carriage 101 starts running, and the frictional resistance at that time can be reduced. In addition, since the operation lever 40 is mounted so that the direction in which the wheels 22 and 23 are operated to the side where the wheels 22 and 23 are in contact with the floor surface U is substantially coincident with the traveling direction of the carriage, the force that pushes the operation lever 40 Coincides with the force that pushes the carriage 101 in the traveling direction, and the vehicle can be started lightly with less force. In addition, almost all of the wheels 22 and 23 are traveling during the straight running operation, and the front wheels 7 and 9 and the rear wheels 11 and 13 serve as auxiliary wheels. Accordingly, the only wheel that is under load is the central wheels 22 and 23, so that the rolling resistance is reduced. Further, since the front wheels 7 and 9 and the rear wheels 11 and 13 are hardly loaded at the time of starting, the load is small, and the soundness can be maintained (long-lasting) for a long period of time.

  As described above, according to the present embodiment, the following effects can be obtained. First, the operation lever 40 is rotatably connected with one end side of the base plate 1 as a rotation center, the arm 34 having a long distance from the rotation center is extended upward, and the distal end side thereof is used as the operation portion, and the rotation center. The arm 35 having a short distance is extended downward, and the tip end side is connected to the connecting member 27 via the transmission member 36, whereby the rotating members 18 and 19 are moved to the grounding surface side by a small operating force of the operating lever 40. When the carriage 101 is lifted up, the load applied to all the front wheels 7 and 9 and the rear wheels 11 and 13 becomes close to zero. Then, when the front wheel or the rear wheel, which is a universal wheel, starts running on the carriage 101, it can rotate in the traveling direction, and the frictional resistance at that time can be reduced. Moreover, since the operation lever 40 is mounted so that the direction in which the wheels 22 and 23 are operated to the side where the wheels 22 and 23 are in contact with the floor surface and the traveling direction of the carriage 101 substantially coincide with each other, the force that pushes the operation lever 40 Matches the force that pushes the cart in the direction of travel, and it can be started lightly with less force. Therefore, if the present invention is applied to a cart for transporting various types of luggage, for example, a light movement can be started even when a heavy luggage is transported in a four-wheel universal wheel truck.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the case of the second embodiment, an auxiliary wheel is attached to a position higher than the above-mentioned wheel on the front side in the traveling direction of the rotating member, and the rotating member is rotated by operating the operation lever. It is possible to switch from the floating state of the vehicle to the grounded state of the wheel and further to the grounded state of the auxiliary wheel. 6 is a perspective view of the cart 110 according to the present embodiment, FIG. 7 is a perspective view of the cart 110 viewed from the bottom, FIG. 8 is a perspective view of the cart 110 viewed from the rear, and FIGS. FIG. 13 is a right side view of the carriage over the wiring, FIGS. 14 and 15 are operational views, FIG. 16 is a right side view of the carriage over the steps, FIGS. 17 and 18 are operational views, and FIG. FIG. 20 is a diagram showing the conveying action of the carriage provided with the two-wheeled universal wheel, and FIG. 21 is an action diagram showing the straightness of the universal wheel due to the wheel contact.

  As shown in FIGS. 6 to 8, a cart 110 for cargo transportation, which is an example of a mobile cart according to the present invention, holds a folding forward and an upright posture at the rear part of the upper surface of the main plate 1. The handle 10 is equipped with left and right supports 3,5. On the back surface of the base plate 1, a pair of front wheels 7 and 9 and a pair of rear wheels 11 and 13 are bolted by mounting plates (connecting portions) 7A, 9A, 11A and 13A at the front and rear left and right positions. . The front wheels 7 and 9 and the rear wheels 11 and 13 are swingable types, but at least the front or rear wheels may be swingable. On the inner side (intermediate position) of the front wheels 7 and 9 and the rear wheels 11 and 13 of the base plate 1, support plates 15 and 17 having a U-shaped cross section fixed to the back surface of the base plate 1 are supported by support bolts 20 and 21 in the front-rear direction. Are provided with rotatable members 15 and 17, respectively. Each of the rotating members has a substantially triangular shape. The lower protrusion 15A (17A) includes a wheel 22 (23), and the upper protrusion 15B (17B) at a higher position has an auxiliary wheel 24 (25). ). The wheel 22 (23) and the auxiliary wheel 24 (25) are connected by a connecting member 27 having a fulcrum in the vicinity of the axle of the wheel 22 (23). As shown in FIG. 9, the wheel 22 (23) is lifted from the front wheels 7, 9 and the rear wheels 11, 13 with the wheels 22 (23) in contact with the ground with the rotating members 15, 17 fully turned to the front side. It is set as the related position (flying position A1) of the non-grounding state. Further, as shown in FIG. 10, the rotating members 15 and 17 are rotated rearward so that the wheel 22 (23) contacts the ground and coincides with the front wheels 7 and 9 and the rear wheels 11 and 13 (lower side). Further, as shown in FIG. 11, the auxiliary wheel 24 (25) and the wheel 22 (23) are in contact with the ground (both wheels grounding position A3), and as shown in FIG. Wheel 22 (23) so that 23) floats together with front wheels 7, 9 and rear wheels 11, 13, and auxiliary wheel 24 (25) stands upright and touches the ground (upper ground contact position A4 and end position A5). Further, the auxiliary wheel 24 (25) has a radial length from the support bolts 20 and 21.

  As shown in FIGS. 1 and 3, an operation lever 40 for operating the connecting member 27 is provided at the rear portion of the base plate 1. In this configuration, two seat plates 30 protruding rearward of the base plate 1 are attached. Bearing bodies 31 and 32 are provided on the left and right sides of the seat plate 30, an operating rod 34 is provided at the right end of the operating shaft 33 pivotally supported on the bearing plate 30, a lower end of the operating piece 35 provided in the middle abdomen, and the connecting member 27. The rear end portion is connected by a transmission member 36. Thus, the operation rod 34 of the operation lever 40 can be switched to each position (A1, A2, A3, A4, A5). It should be noted that the auxiliary wheel 24 (25) and the wheel 22 (23) of each of the rotating members 15 and 17 are held between the connecting member 27 and the base plate 1 in order to maintain the non-grounding related position (the floating position A1). The urging means 50 is stretched.

  The operation will be described based on the above configuration. According to the carriage 110 of the present invention, it is possible to start light movement even when carrying a heavy load on the carriage, as well as over the wiring, over the groove, stepping up on the floor or road surface, and ensuring straightness on the slope. Make it possible.

  The operation will be specifically described below. First, when traveling on a flat floor surface (road surface) U, as shown in FIG. 13, the rotating members 15 and 17 are rotated to the front side via the connecting member 27 by the operation lever 40 and the urging means 50. 22 (23) and auxiliary wheel 24 (25) are held at the relative position (floating position A1) in a non-grounded state where they float from the floor surface U. In this state, the carriage 110 on which the luggage W is loaded is transferred by pushing the handle 10. Of course, the carriage 110 is moved on the basis of the relationship (lower contact position A2) where the wheels 22 (23) are grounded to the floor (road surface) U and coincide with the front wheels 7, 9 and the rear wheels 11, 13. Also good.

  The operation of reducing the starting force when a heavy load is loaded on the cart 110 will be described with reference to FIG. Prior to the transfer of the carriage 110, the rotating members 15 and 17 are rotated rearward by the operation lever 40 so that the wheels 22 (23) are grounded to the floor U and pushed up. As a result, the front and rear wheels 22 (23) directed in the traveling direction S support the carriage 120, and the load on the four-wheel free wheels 7, 9, 11, and 13 is greatly reduced. As a result, as shown in FIG. 21A, the cart 120 can start to travel lightly with a weak pressing force F even if the four-wheeled universal wheels 7, 9, 11, 13 do not face the traveling direction S. Once traveling is started, the four-wheeled universal wheels 7, 9, 11, and 13 are directed in the traveling direction as shown in FIG. 21 (b). In addition, said structure and effect | action are the same as the case of 1st Embodiment, The description is used.

  Next, the operation of the carriage 110 over the wiring P in the factory will be described with reference to FIGS. First, as shown in FIG. 14, when the front wheels 7 and 9 approach the wiring P, the operation lever 40 is moved to the (lower side grounding position A2), and the rotating members 15 and 17 are rotated rearward. 22 is grounded to the floor surface U on the near side of the wiring. Subsequently, the operating lever 40 is moved from (both wheel grounding position A3) to (upper grounding position A4), and the rotating wheels 15 and 17 are further pivoted to the rear side so that the auxiliary wheels 24 floating on the wiring P are connected. It is grounded across the other side. Thereafter, when the carriage 110 is pushed forward and the rear wheels 11 and 13 approach the wiring, as shown in FIG. 15, the same operation as that of the front wheels is performed, and the rear wheels 11 and 13 are levitated to straddle the front side of the wiring P. And grounded.

  Next, the operation of the carriage 110 over the step D will be described with reference to FIGS. As shown in FIG. 16, the rotating members 15 and 17 are rotated to the front side by the operation lever 40 and the urging means 50 via the connecting member 27, so that the wheels 22 (23) and the auxiliary wheels 24 (25) are moved to the floor surface. It is held at a related position (floating position A1) in a non-grounded state floating from U. Of course, the carriage 110 may be transported based on a relationship (lower grounding position A2) where the wheels 22 (23) are grounded to the ground and coincide with the front wheels 7, 9 and the rear wheels 11, 13. In this state, the carriage 110 on which the luggage W is loaded is transferred by pushing the handle 10. Then, as shown on the left side of FIG. 17, when the front wheels 7 and 9 approach the step D, the operation lever 40 is moved to the (lower grounding position A2) to rotate the rotating members 15 and 17 to the rear side. The wheel 22 is brought into contact with the side surface of the step D. Subsequently, as shown on the right side in FIG. 17, the operation lever 40 is moved to (both wheels ground contact position A3). As a result, the auxiliary wheel 24 steps into the upper surface of the step D to lift up the wheel 22 and the front wheel 7 by the rotation of the rotating members 15 and 17, and the carriage 110 is further moved to the step D side in this state. After that, when the carriage 110 is pushed forward and the rear wheels 11 and 13 approach the step D, as shown in FIG. 17, the rear wheels 11 and 13 are lifted by the same operation as lifting the front wheels 7 and 9, The wheel 23 and the rear wheels 11 and 13 are lifted by the rotation of the rotating members 15 and 17 by stepping on the upper surface of the step D, and the rear wheels 11 and 13 of the carriage 110 can be put on the step D in this state. Thereafter, the carriage 110 is traveled on a high level difference D with the operation lever 40 as (floating position A1) or (lower grounding position A2). Similar to the operation over the step D, the groove crossing is executed in the same manner as the step over the step even over the wide groove.

  Moreover, the effect | action in which the trolley | bogie 110 is lowered | hung to the low side of the level | step difference D is demonstrated in FIG. When the front wheels 7 and 9 approach the lower side of the level difference D, the operation lever 40 is moved from (both wheel grounding position A3) to (upper grounding position A4), and the rotating members 15 and 17 are further rotated to the rear side. The auxiliary wheel 24 is grounded to the ground U where the level difference D is low. In this state, when the carriage 110 is pushed forward, the auxiliary wheel 24 moves from the step D to the lower ground U. Subsequently, when the rear wheels 11 and 13 approach the lower side of the step D, the operation lever 40 is temporarily returned to (both wheel grounding position A3), and the operation lever 40 is moved with the auxiliary wheel 24 protruding from the end of the step D. It moves to (upper ground contact position A4), and the auxiliary wheel 24 is grounded to the ground U where the level difference D is low. In this state, the carriage 110 is pushed forward, and the rear wheels 11 and 13 are lowered from the step D to the lower ground U. The subsequent carriage 110 is driven on the low ground U with the operation lever 40 set to (the floating position A1) or (the lower grounding position A2).

  Further, FIG. 19 and FIG. 19 show the conveying action of the carriage 110 having the four-wheeled free wheels 7, 9, 11, 13 and the conveying action of the carriage 120 having the two-wheeled free wheels 7, 9, 11 ′, 13 ′. 20 will be described. First, as shown in FIG. 19, when the carriage 110 is traveled straight on an obliquely inclined road surface U where the left side is high and the right side is low, the wheel 22 (23) is grounded to the ground by the operation lever 40, and the front wheel The carriage 110 is transferred based on the relationship (lower ground contact position A2) that coincides with the 7, 9 and the rear wheels 11, 13. In this state, when the carriage 110 is transported by pushing the handle 10 with the pushing force F, the acting force F1 to the low side is normally applied, but the front and rear wheels 22 (23) of the four wheels are directed in the traveling direction. Since it is grounded on the road surface, the acting force that skids to the lower side of the inclined surface during traveling is suppressed, and the straight traveling force F2 is ensured.

  Further, in the cart 120 provided with the two-wheeled universal wheels 7, 9, 11 ', and 13', as shown in FIG. 20, the cart 120 is straightly moved on an obliquely inclined road surface U having a high left side and a low right side. The wheel 22 (23) is grounded to the ground by the operating lever 40, and the carriage 120 is transferred based on the relationship (lower grounding position A2) that coincides with the front wheels 7, 9 and the rear wheels 11, 13. . In this state, when the carriage 120 is moved by pushing the handle 10 with the pushing force F, the acting force F1 to the low side is normally applied, but the wheels 22 (23) before and after the four-wheel contact are in the traveling direction. Since the vehicle is grounded toward the road surface, an acting force that skids to the lower side of the inclined surface during traveling is suppressed, and a straight traveling force F2 is ensured. The carriage 120 can be configured such that the wheels 22 (23) are disposed only on the free wheels 7 and 9 side.

  As described above, according to the carriages 110 and 120 according to the second embodiment of the present invention, the following effects are exhibited. First, similarly to the description of the first embodiment, a light movement can be started even when a heavy load is transported on a carriage, and a light work can be efficiently performed. In addition to the above, the cart that transports various small parcels can ensure stepping on the road surface, stepping down of the road surface, over the wiring, over the groove, and straightness on the slope.

  The mobile cart 100 of the present invention is not limited to the first and second embodiments. For example, in the second embodiment, the design can be changed in detail. First, in the second embodiment of FIG. 22, the wheels 22 (23) and the auxiliary wheels 24 (25) are arranged in a plurality of two rows, the lateral width is wide like L1 or L2, and the front wheels 7, 9 are arranged. And it is good also as the wheel space | interval L of the rear-wheels 11 and 13 approaches, and stable driving | running | working is good. Further, in the third embodiment shown in FIG. 23, the wheels 22 (23) and the auxiliary wheels 24 (25) are wide as the width dimension L1, and the wheels of the front wheels 7, 9 and the rear wheels 11, 13 are set. The distance L may be approached to enable stable running.

  Further, as shown in the fourth embodiment of FIG. 24, the operation lever 40 is provided with a locking and fixing means 60 for the rotating members 15 and 17, and the wheels 22 (23) and auxiliary wheels provided for the rotating members. 24 (25) is securely held in a state where both wheels are not grounded or one-side grounded with respect to the floor U. The locking and fixing means 60 is pivotally supported by a step plate 62 attached to the side surface of the bearing body 31 and the right end of the operation shaft 33 supported by the bearing bodies 31 and 32, and an operation rod ( A pivoting force for rotating the main part 34 of the operation lever 34 toward the stepping plate 62 side is provided, and a stop pin 64 attached to the base portion and stop holes h1 to h5 opened in the stepping plate 62 are provided. .

  Then, as shown in FIG. 25, by locking the stop pin 64 of the operation rod (main part of the operation lever) 34 to any one of the stop holes h1 to h5 opened in the stepping plate 62, The wheel 22 (23) and the auxiliary wheel 24 (25) are held at any one of the floating position A1, the lower grounding position A2, the two-wheel grounding position A3, and the upper grounding positions A4 and A5.

  Furthermore, the mobile trolley | bogie of this invention is not limited to the form of the said trolley | bogie for luggage transport. For example, as shown in FIG. 26, the present invention can also be applied to a wheelchair 130 by an assistant M0. The wheelchair 130 also exhibits the same functions and effects as those of the above-described cart such as overcoming steps, wiring, and straightness. Furthermore, as shown in FIG. 27, the present invention can also be applied to a stroller 140 by an assistant M. This stroller 140 also exhibits the same actions and effects as the above-described cart such as overstepping, wiring, and straightness.

  The mobile carriage of the present invention is not limited to the carriage, wheelchair or stroller of the above embodiments. For example, the present invention can also be applied to service carriers (carts on which products are loaded) used in trains and passenger aircraft, and tool transportation equipment on the site of a machine manufacturing factory.

It is a figure which shows the 1st Embodiment of this invention and is the perspective view which looked at the trolley | bogie from the bottom face. It is a figure which shows the 1st Embodiment of this invention, and is the perspective view which looked at the trolley | bogie from back. It is a figure which shows the 1st Embodiment of this invention and is a right view of a trolley | bogie. It is a figure which shows the 1st Embodiment of this invention and is a right view of a trolley | bogie. It is a figure which shows the 1st Embodiment of this invention and is an effect | action figure which shows the rectilinear advance of a free wheel. It is a figure which shows the 2nd Embodiment of this invention, and is a perspective view of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention, and is the perspective view which looked at the trolley | bogie from the bottom face. It is a figure which shows the 2nd Embodiment of this invention, and is the perspective view which looked at the trolley | bogie from back. It is a figure which shows the 2nd Embodiment of this invention, and is a right view of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention, and is a right view of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention, and is a right view of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention, and is a right view of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention, and is a right view of a wiring crossing trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention and is an effect | action figure of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention and is an effect | action figure of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention and is a right view of a level | step difference carriage. It is a figure which shows the 2nd Embodiment of this invention and is an effect | action figure of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention and is an effect | action figure of a trolley | bogie. It is a figure which shows the 2nd Embodiment of this invention and is a conveyance effect | action figure of the trolley | bogie provided with the 4-wheel free wheel. It is a figure which shows the 2nd Embodiment of this invention, and is a conveyance effect | action figure of the trolley | bogie provided with the two-wheel free wheel. It is a figure which shows the 2nd Embodiment of this invention, and is an effect | action figure which shows the rectilinearity of a free wheel. It is a figure which shows the 3rd Embodiment of this invention, and is a bottom view of the trolley | bogie which made the wheel and the auxiliary wheel into multiple. It is a figure which shows the 4th Embodiment of this invention, and is a bottom view of the trolley | bogie which expanded the width | variety of a wheel and an auxiliary wheel. It is a figure which shows the 5th Embodiment of this invention, and is a perspective view of the trolley | bogie provided with the securing fixing means of a wheel and an auxiliary wheel. It is a figure which shows the 6th Embodiment of this invention, and is an effect | action figure of a locking fixing means. It is a figure which shows 7th Embodiment of this invention, and is the right view applied to the wheelchair by an assistant. It is a figure which shows 8th Embodiment of this invention, and is the right view applied to the stroller.

Explanation of symbols

1 Base plate 3, 5 Support member 7, 9 Front wheel 7A, 9A Mounting plate (connection part)
11A, 13A Mounting plate (connecting part)
10 Handle 11, 13 Rear wheel 11 ', 13' Free wheel 15, 17 Rotating member 15A (17A) Projection 15B (17B) Projection 18, 19 Support plate 20, 21 Support bolt 22 (23) Wheel 24 (25 ) Auxiliary wheel 27 Connecting member 30 Seat plate 31, 32 Bearing body 33 Operation shaft 34 Operation rod 35 Operation piece 36 Transmission member 40 Operation lever 50 Energizing means 60 Locking fixing means 62 Step plate 64 Stop pin 65 Winding spring 100 Movement Dolly 110 Dolly 120 Dolly 130 Wheelchair 140 Stroller A Depression A1 Floating position A2 Lower grounding position A3 Two-wheel grounding position A4 Upper grounding position A5 End position D Step F Pushing force F1 Lower side acting force F2 Linear force L1, L2 Width dimension H Floating h1 to h5 Stop hole M0 Helper P Wiring U Floor

Claims (9)

  A base plate with a handle for manual operation, front wheels and rear wheels attached to the bottom four sides of the base plate, and in the traveling direction of the cart with the bottom of the base plate as a pivot center around the bottom center of the base plate A pair of rotating members that are rotatably connected to each other, a wheel that is provided on the distal end side of the rotating member and is attached so as to be movable from a floating state to a grounded state by the rotation of the rotating member; A connecting member connected to the front and rear rotating members and an arm having a long distance from the center of rotation that is pivotally connected to one end of the base plate as a center of rotation, and the tip end side thereof Extend the arm with a short distance from the rotation center as the operation part, connect the tip part side to the connecting member via the transmission member, and operate the operation part to the side where the wheel contacts the floor and the direction of the carriage It is installed so that the direction of travel is almost the same, and the operation unit is started first. Movable carrier, characterized by comprising an operating lever for pushing up the dolly by the action of the wheels on the floor surface by operating the operation unit as a floating state a wheel in the operating direction, the when the state.   Auxiliary wheels are attached to the front side of the rotating member in the direction of travel and higher than the above wheels, and the rotating member is rotated by operating the operation lever. 2. The movable carriage according to claim 1, wherein the carriage can be switched to a grounded state.   The movable carriage according to claim 1 or 2, wherein an urging means is attached between the base plate and the connecting member to maintain the floating state of the wheels.   4. The operation lever is provided with a locking and fixing means, and the wheel and auxiliary wheel provided in each of the rotating members are held from the floating state to the grounded state of the wheel, and further to the grounded state of the auxiliary wheel. Moving trolley.   One of the front wheels or the rear wheels is a fixed wheel, and the other is a free wheel.   The movable carriage according to any one of claims 1 to 4, wherein the front wheels and the rear wheels are universal wheels.   The mobile cart according to any one of claims 1 to 6, wherein the mobile cart is a cart for transferring goods.   The moving carriage according to any one of claims 1 to 6, wherein the moving carriage is a wheelchair.   The mobile carriage according to any one of claims 1 to 6, wherein the mobile carriage is a stroller.

Images