JP3223208U - Stair transport cart - Google Patents

Abstract

The present invention provides a carriage for stair conveyance that can provide a dolly that can be used for running on a stairs and a floor surface at a low cost. A rotating body 22 is provided that rotatably supports a plurality of radially arranged rollers 23. The rotating body 22 is rotatably supported at both left and right ends of the axle 21. A fixed leg 31 fixed to the side surface of the axle 21 is provided. The fixed arm 32 is extended from the fixed leg 31 in the front-rear direction of the rotating body 22. The fixed arm 32 is engaged with the rotation shaft 23 </ b> A of the roller 23 that is pivotally supported by the rotating body 22. [Selection] Figure 1

Description

  The present invention relates to a stair transport cart that facilitates movement on a floor or a stair when transported by a cart.

  Patent documents 1 and patent documents 2 are proposed as a cart which assists raising and lowering of stairs. In each of the carts, a rotating body in which a plurality of rollers are radially connected is provided at both ends of the axle. And when raising / lowering stairs etc., it is the structure which a some roller rotates and gets over a level | step difference with the rotary body connected with the axle.

  When these carts move on a flat floor surface or the like, the two pairs of left and right rollers run on the floor surface. However, if the four rollers are in contact with the floor at the same time, when the direction of the carriage is changed, an inner ring difference is generated between the front and rear rollers, and resistance is generated when the direction is changed.

  Therefore, these carts are configured so that the rotation of the rotating body is stopped when the direction is changed, and the inner ring difference is eliminated by changing the direction while the pair of left and right rollers are in contact with each other, so that the direction change is facilitated. .

  Regarding the configuration for stopping the rotating body, different structures are adopted in Patent Document 1 and Patent Document 2. That is, the cart of patent document 1 is a mechanism which connects a motor to a wheel and rotates and stops a rotating body by the rotation of this motor. That is, it is a structure in which the rotation of the rotating body is stopped by the motor and the direction is changed by grounding only the pair of left and right rollers.

  On the other hand, the cart of Patent Document 2 describes a structure in which a pin hole is provided on a side surface of a rotating body that pivotally supports a plurality of rollers, and the rotation of the rotating body is stopped by extracting a pin from the pin hole. In addition to this, there is also proposed a structure in which a stopper cylinder is provided around the axle, a concave pin hole is provided on the outer surface of the stopper cylinder, and a stopper pin that is inserted into and removed from this pin hole is provided in a freely swingable manner. Has been.

JP 2004-314879 A JP 2006-315646 A

  However, each structure for stopping these wheels and rotating bodies has the following problems. First, a mechanism in which a motor is connected to wheels and the rotation of the rotating body is stopped by this motor, as in the cart of Patent Document 1, has a problem that the mechanism is too complicated in the first place. Therefore, the manufacturing cost becomes extremely high. In addition, since it is necessary to mount a battery for the motor, there is a disadvantage that the weight of the entire cart becomes extremely heavy.

  On the other hand, the two structures shown in Patent Document 2 both have a problem in durability in the structure that stops the rotation of the rotating body. That is, in a structure in which a pin hole is provided on the side surface of the rotating body and the rotation of the rotating body is stopped by extracting the pin from the pin hole, the entire load of the load loaded on the carriage is concentrated on the pin. As a result, there is a risk of deformation of the pins and peripheral members that support the pins.

  In addition, even in the structure in which the stopper pin that fits into the pin hole provided on the axle is pulled out, the entire load applied in the rotation direction of the axle is applied to the tip of the stopper pin. There is a risk. In addition, since this stopper pin has a structure in which a stopper pin that moves up and down is inserted into a pin hole provided on the axle from above, there is a possibility that vibration during traveling may easily come out of the pin hole when applied to the axle.

  As described above, in the conventional cart, many problems remain in the structure for stopping the rotation of the rotating body when the direction is changed. Accordingly, the present invention has been devised to solve the above-described problems, and is a stair transport cart that can increase the durability of the cart that can be used in combination with running on the stairs and the floor surface, and can be provided at a low cost. It is intended to provide.

In order to achieve the above-mentioned object, the first means in the present invention is a load placing body 10 having a load placing portion 12 on the front surface of the lower end portion of the support member 11 and an operation handle 13 on the upper end portion of the support member 11. And a rotary body 22 that rotatably supports a plurality of radially arranged rollers 23, and a rotary moving body 20 that rotatably supports the rotary body 22 on both left and right ends of the axle 21. In the stair transport cart configured to rotate over the step by rotating the rotating body 22 when the stair is raised and lowered,
A pair of fixed legs 31 fixed to the outer surfaces of the left and right ends of the axle 21 and extending in the front-rear direction of the rotating body 22 provided on each of the fixed legs 31, and on the rotating body 22 side A fixed body 30 is constituted by a pair of fixed arms 32 provided so as to be swingable toward the
In this configuration, the rotation of the rotating body 22 is restricted by engaging a fixed arm 32 with a rotating shaft 23A of the roller 23 pivotally supported on the rotating body 22.

  In the fixed body 30 of the second means, a telescopic pressing body 40 is provided on the fixed arm 32. When the pressing body 40 is extended, the fixed arm 32 is engaged with the rotating shaft 23A, and the pressing body 40 is The fixed arm 32 is configured to be released when retracted.

  In the fixed body 30 of the third means, the auxiliary leg 50 that contacts the floor surface in front of the rotary moving body 20 is fixed to the fixed leg 31, and the auxiliary leg 50 is in contact with the floor surface. Thus, the fixed arm 32 is configured to engage with the rotating shaft 23A.

The load placing body 10 of the fourth means is provided with the placing portion 12 that can be moved up and down along the support member 11, and the placing portion 12 approaching the operation handle 13 is attached to the supporting member 11. A fixing body 14 for fixing,
The fixed body 30 includes an auxiliary leg 50 fixed to the fixed leg 31 and abutting against a floor surface in front of the rotary moving body 20, and the fixed arm 30 is positioned at a position where the auxiliary leg 50 abuts against the floor surface. 32 is configured to engage with the rotating shaft 23A,
When the fixed arm 32 is engaged with the rotary shaft 23A, the auxiliary leg 50 is configured to support the mounting portion 12 fixed to the fixed body 14.

  As described in claim 1, the fixed arm 32 is engaged with the rotating shaft 23 </ b> A supporting the roller 23 on the rotating body 22 to restrict the rotation of the rotating body 22, so that the rotating body 22 is loaded on the carriage. Even if the entire load of the load P is concentrated on the fixed arm 32, the fixed arm 32 can be prevented from being damaged or deformed, and the rotation of the rotating body 22 can be reliably stopped.

  That is, since the fixed arm 32 that engages with the rotating shaft 23A extends from the fixed leg 31 in the front-rear direction of the rotating body 22, it has an extremely strong relationship with respect to the load concentrated on the front and rear of the rotating shaft 23A. A resultant force can be obtained.

  In addition, in order to engage the fixed arm 32 with the rotation shaft 23A, the fixed arm 32 swingably provided on the fixed leg 31 only has to be tilted toward the rotating body 22 side, so that the configuration is extremely simple. ing. As a result, a cart that can be used in combination with stairs and the floor can be provided at a low cost and at a low cost.

  According to the second aspect of the present invention, the pressing body 40 that can be expanded and contracted is provided on the fixed arm 32. When the pressing body 40 is extended, the fixing arm 32 is engaged with the rotating shaft 23A, and when the pressing body 40 is retracted, the fixed arm 32 is released. Thus, even if an impact is applied to the roller 23 or the rotating body 22, the engagement state of the fixed arm 32 is not unintentionally released.

  As in claim 3, the auxiliary leg 50 that contacts the floor surface in front of the rotary moving body 20 is fixed to the fixed leg 31, and the fixed arm 32 is positioned at the position where the auxiliary leg body 50 contacts the floor surface. Since it is configured to engage with the rotating shaft 23A, the fixing arm 32 can be fixed only by bringing the auxiliary leg 50 into contact with the floor surface, and the fixing operation of the rotating body 22 is extremely smooth. Can be done.

  According to the fourth aspect of the present invention, the load placing body 10 has the placing portion 12 provided so as to be movable up and down along the support member 11, and the fixed body 14 that fixes the placing portion 12 approaching the operation handle 13 to the support member 11. Therefore, the operation of moving the load placed on the placement portion 12 on the lower end side of the load placement body 10 to the operation handle 13 side and supporting it on the support member 11 can be performed in a stable state. .

  In addition, when the fixed arm 32 is engaged with the rotating shaft 23A, the auxiliary leg 50 is configured to support the mounting portion 12 fixed to the fixed body 14, so that, for example, the mounting portion 12 The work of raising and lowering the loaded luggage on the truck mount becomes extremely easy. Therefore, it is possible to provide a loading platform suitable for raising and lowering the vehicle to the loading platform in addition to the vertical movement of the stairs.

  As described above, according to the present invention, the initial purpose of improving the durability of the carriage that can be used for traveling between the stairs and the floor surface, and being able to provide it at a light weight and at a low cost is achieved.

It is a perspective view which shows one Example of this invention. It is a front view which shows the relationship between the fixed body of this invention, and a press body. It is a principal part perspective view which shows the relationship between the fixed body and auxiliary leg body of this invention. It is a side view which shows the fixed body of this invention. It is a side view which shows the state which fixes a rotary body with a fixed body and changes direction. It is a side view which shows the state which defeats a support member and raises / lowers a load. It is a side view which shows the state which mounted the load on the mounting part. It is a side view which shows the state which latched the load loaded in the mounting part to the fixed body.

  The cart according to the present invention facilitates movement on a floor surface or stairs when carrying a heavy object, and the main components thereof are a luggage carrier 10, a rotary moving body 20, a fixed body 30, and a pressing body 40. The auxiliary leg 50 is provided (see FIG. 1).

  The load placing body 10 includes a placing portion 12 for placing a load on the front surface of the lower end portion of the support member 11, and an operation handle 13 at the upper end portion of the support member 11 (see FIG. 1). Then, a rotary moving body 20 (to be described later) is provided on the luggage placing body 10 to convey the floor surface, stairs, and the like.

  In the illustrated example of the luggage placing body 10, the placing portion 12 is provided so as to be movable up and down along the support member 11 (see FIG. 1). That is, a slide body 15 that slides along the support member 11 is provided on the mounting portion 12, and a plurality of moving wheels 16 are provided from the slide body 15 to the front and rear surfaces of the support member 11. Then, the mounting portion 12 is moved up and down along the support member 11 with these moving wheels 16.

  Furthermore, when the fixed body 14 is provided near the operation handle 13 and one of the moving wheels 16 when the mounting portion 12 approaches the operation handle 13 is locked to the fixed body 14, the slide body 15 is fixed. The luggage P placed on the placement unit 12 can be held at a high position (see FIG. 8). In addition, the luggage placing body 10 can select the placing part 12 fixed to the support member 11 in addition to the placing part 12 that can be raised and lowered.

  The rotary moving body 20 is a combination of a rotating body 22 pivotally supported on an axle 21 and a plurality of rollers 23 pivotally supported on the rotating body 22 (see FIG. 1). That is, the rotating body 22 is a rotating member that is rotatably supported at both left and right end portions of the axle 21. On the other hand, the rollers 23 are a plurality of members arranged radially on the rotating body 22 at intervals, and rotatably support the rollers 23 on the rotating body 22.

  In the illustrated example, three pairs of rollers 23 are pivotally supported on the rotating body 22 (see FIG. 1). When the two pairs of rollers 23 are grounded, the remaining pair protrudes upward. Although the number of rollers 23 can be increased to three pairs or more, the lightest fixed body 30 can be formed by using a minimum of three pairs.

  When traveling on the floor, the two pairs of rollers 23 are grounded and rotated (see FIG. 6). When the stairs are raised and lowered, the grounded roller 23 first hits the steps of the stairs. Then, the rotating body 22 rotates, and another roller 23 gets over the step and contacts the new step surface. Accordingly, the other rollers 23 are sequentially brought into contact with the stepped surface of the staircase and rotated while the rotating body 22 is rotated, so that the resistance during raising and lowering can be reduced.

  The fixed body 30 basically includes a fixed leg 31 and a fixed arm 32 (see FIG. 1). When the rotation of the rotating body 22 is stopped by the fixed body 30 and the support member 11 is tilted when traveling on the floor surface, only the pair of rollers 23 can be brought into contact with the ground (see FIG. 5). As a result, the inner ring difference that occurs when the two pairs of left and right traveling are eliminated, and the direction can be easily changed. The fixed legs 31 are a pair of fixing members fixed to the outer surfaces of the left and right ends of the axle 21 (see FIG. 3). The illustrated fixed leg 31 has a casing shape orthogonal to the axle 21.

  On the other hand, the fixed arm 32 is a pair of engaging members provided on each fixed leg 31 (see FIG. 3). These fixed arms 32 extend in the front-rear direction of the rotating body 22 and are provided so as to be swingable toward the rotating body 22 via the swing shaft 32B (see FIG. 4). Then, when the fixed arm 32 is tilted toward the rotating body 22 and the fixed arm 32 is engaged with the rotating shaft 23A of the roller 23, the rotation of the rotating body 22 can be stopped. The illustrated fixed arm 32 has a substantially triangular plate shape, and forms an engagement hole 32 </ b> A that engages with the rotation shaft 23 </ b> A of the roller 23. When the rotating shaft 23A enters the engaging hole 32A, the rotating body 22 is stopped and the rotating body 22 is stopped. When the rotating shaft 23A is removed from the engaging hole 32A, the rotating body 22 is released and rotates. .

  The pressing body 40 is a fixing member that is attached to the fixing arm 32 so as to be extendable and contractible (see FIG. 1). When the pressing body 40 is extended, the fixed arm 32 is engaged with the rotating shaft 23A. Further, the fixed arm 32 is released when the pressing body 40 is retracted. The illustrated pressing body 40 assists the swinging movement of the swinging rod 41, a pair of left and right swinging rods 41 laid between the fixed arms 32, a fixing portion 42 that fixes the swinging position of the swinging rod 41. It comprises a tension spring 43 (see FIG. 2).

  The swing rod 41 is a pair of rod-shaped members having one end fixed to the side surface of each fixed arm 32, and is formed to have a length in which the fixed arms 32 overlap with each other at the center portion of the fixed arm 32 (FIG. 2). reference). The fixed portion 42 includes a slide groove portion 42A formed on one swing rod 41 and a slide pin 42B that protrudes from the other swing rod 41 and slides in the slide groove portion 42A.

  When the central portion of each swing bar 41 is lifted upward, the slide pin 42B moves along the slide groove 42A, and the entire length of the swing bar 41 is extended, so that the fixed arm 32 is pressed and fixed. The engagement hole 32A of the arm 32 engages with the rotation shaft 23A. At this position, it is fixed to the fixing groove 42Aa provided at the end of the slide groove 42A, and the engaged state is fixed (see the solid line portion in FIG. 2).

  To release the engaged state, the central portion of the overlapping swing rod 41 is slightly lifted, and the slide pin 42B fixed to the fixing groove 42Aa is simply removed, so that the entire length of the swing rod 41 is reduced. That is, the tension spring 43 is connected from one swing rod 41 to the fixed leg 31 below the swing rod 41 so as to always pull the swing rod 41 downward (see FIG. 2).

  Therefore, when the slide pin 42B is removed from the fixed groove 42Aa, the tension spring 43 pulls down the swing rod 41, so that the slide pin 42B moves along the slide groove portion 42A, and the swing rod 41 overlaps the horizontal state. As a result, the fixed arm 32 that has fixed the swing rod 41 is pulled back from the tilted engagement position and returns to the original position. Thus, in the illustrated example, the fixed arm 32 can be engaged and released by an operation of lifting the center of the swinging rod 41. Therefore, the operator can easily operate using one leg. In addition, the pressing body 40 can also utilize an expansion / contraction mechanism such as an air spring.

  The auxiliary leg 50 is a member that determines the position at which the fixed arm 32 engages with the rotation shaft 23A (see FIG. 3). The auxiliary leg 50 is fixed to the fixed leg 31 and is provided so as to contact the floor surface in front of the rotary moving body 20. And it is comprised so that the fixed arm 32 may engage with the rotating shaft 23A in the position where the auxiliary leg body 50 contact | abutted to the floor surface.

  The illustrated auxiliary leg 50 includes a leg 51 and a support 52 (see FIG. 3). The leg portion 51 is a portion that extends from the fixed leg 31 and is bent toward the floor surface. The support body 52 is a part that is provided at the lower end portion of the leg portion 51 and is grounded to the floor surface in front of the rotary moving body 20.

  Furthermore, the illustrated luggage placement body 10 is provided with a placement body 12 that can be moved up and down, and includes a fixed body 14 that fixes the placement section 12 approaching the operation handle 13 (see FIG. 1). When the fixed arm 32 of the fixed body 30 is engaged with the rotary shaft 23A, the support body 52 of the auxiliary leg 50 is configured to support the mounting portion 12 that moves up and down.

  That is, first, the load P is placed on the placement unit 12 (see FIG. 7). Next, when the handle 15A of the mounting portion 12 is lifted from this state and the slide body 15 is locked to the fixed body 14, the load P placed on the mounting portion 12 is fixed to the upper portion of the support member 11. (See FIG. 8).

  When lifting the load P placed on the placement portion 12, if the support member 11 is tilted, the load P placed on the placement portion 12 can be easily moved (see FIG. 6). Then, after the mounting portion 12 is fixed to the support member 11, when the support member 11 is returned to the original position and the rotating body 22 is fixed, the load P can be supported even when the hand is released from the operation handle 13. Yes (see FIG. 8).

  In addition, each structure of this invention is not limited to the example of illustration, It is possible to change a design freely in the range which does not change the summary of this invention.

P Luggage 10 Luggage placement body 11 Support member 12 Placement portion 13 Operation handle 14 Fixed body 15 Slide body 15A Handle 16 Moving wheel 20 Rotating moving body 21 Axle 22 Rotating body 23 Roller 23A Rotating shaft 30 Fixed body 31 Fixed leg 32 Fixed Arm 32A Engagement hole 32B Oscillating shaft 40 Pressing body 41 Oscillating rod 42 Fixing part 42A Slide groove part 42B Slide pin 42Aa Fixing groove 43 Tension spring 50 Auxiliary leg body 51 Leg part 52 Support body

The load placing body 10 of the fourth means is provided with the placing portion 12 that can be moved up and down along the support member 11, and the placing portion 12 approaching the operation handle 13 is attached to the supporting member 11. A fixing device 14 for fixing ,
The fixed body 30 includes an auxiliary leg 50 fixed to the fixed leg 31 and abutting against a floor surface in front of the rotary moving body 20, and the fixed arm 30 is positioned at a position where the auxiliary leg 50 abuts against the floor surface. 32 is configured to engage with the rotating shaft 23A,
When the fixed arm 32 is engaged with the rotating shaft 23A, the auxiliary leg 50 is configured to support the mounting portion 12 fixed to the fixture 14.

According to the fourth aspect of the present invention, the load placing body 10 is provided with the placing portion 12 so as to be movable up and down along the support member 11, and the fixture 14 that fixes the placing portion 12 approaching the operation handle 13 to the support member 11. Therefore, the operation of moving the load placed on the placement portion 12 on the lower end side of the load placement body 10 to the operation handle 13 side and supporting it on the support member 11 can be performed in a stable state. .

In addition, when the fixed arm 32 is engaged with the rotary shaft 23A, the auxiliary leg 50 is configured to support the mounting portion 12 fixed to the fixing tool 14, so that, for example, the mounting portion 12 The work of raising and lowering the loaded luggage on the truck mount becomes extremely easy. Therefore, it is possible to provide a loading platform suitable for raising and lowering the vehicle to the loading platform in addition to the vertical movement of the stairs.

Furthermore, a fixing tool 14 is provided near the operation handle 13, and when one of the moving wheels 16 when the placement unit 12 approaches the operation handle 13 is locked to the fixing tool 14, the slide body 15 is fixed. The luggage P placed on the placement unit 12 can be held at a high position (see FIG. 8). In addition, the luggage placing body 10 can select the placing part 12 fixed to the support member 11 in addition to the placing part 12 that can be raised and lowered.

Furthermore, the illustrated luggage placement body 10 includes a mounting portion 12 that can be moved up and down, and includes a fixture 14 that fixes the placement portion 12 approaching the operation handle 13 (see FIG. 1). When the fixed arm 32 of the fixed body 30 is engaged with the rotary shaft 23A, the support body 52 of the auxiliary leg 50 is configured to support the mounting portion 12 that moves up and down.

That is, first, the load P is placed on the placement unit 12 (see FIG. 7). Next, when the handle 15A of the placement part 12 is lifted from this state and the slide body 15 is locked to the fixture 14, the load P placed on the placement part 12 is fixed to the upper part of the support member 11. (See FIG. 8).

P Luggage 10 Luggage placement body 11 Support member 12 Placement portion 13 Operation handle 14 Fixing tool 15 Slide body 15A Handle 16 Moving wheel 20 Rotation movement body 21 Axle 22 Rotation body 23 Roller 23A Rotation shaft 30 Fixed body 31 Fixed leg 32 Fixed Arm 32A Engagement hole 32B Oscillating shaft 40 Pressing body 41 Oscillating rod 42 Fixing part 42A Slide groove part 42B Slide pin 42Aa Fixing groove 43 Tension spring 50 Auxiliary leg body 51 Leg part 52 Support body

Claims (4)

A load placement body having a load placement portion on the front surface of the lower end portion of the support member and an operation handle on the upper end portion of the support member, and a rotation body rotatably supporting a plurality of radially arranged rollers; A stair transporting carriage having a rotating moving body that rotatably supports the rotating body at both right and left ends of an axle, and configured to rotate over the step by rotating the rotating body when moving up and down the staircase;
A pair of fixed legs fixed to the outer surfaces of the left and right end portions of the axle, and extended in the front-rear direction of the rotating body, and swingable toward the rotating body. A fixed body is composed of a pair of fixed arms provided,
A stair transport cart configured to restrict a rotation of the rotating body by engaging a fixed arm with a rotating shaft of the roller supported by the rotating body.   In the fixed body, a pressing body that can expand and contract is provided on the fixed arm, and the fixed arm is engaged with the rotation shaft when the pressing body is extended, and the fixed arm is released when the pressing body is retracted. The stair transport cart according to claim 1.   In the fixed body, an auxiliary leg that is in contact with the floor surface in front of the rotary moving body is fixed to the fixed leg, and the fixed arm is engaged with the rotation shaft at a position where the auxiliary leg is in contact with the floor surface. The stair transport cart according to claim 1, which is configured to match. The luggage placing body includes a fixing body in which the placement section is provided so as to be movable up and down along the support member and fixes the placement section approaching the operation handle to the support member,
The fixed body includes an auxiliary leg that is fixed to the fixed leg and abuts against a floor surface in front of the rotary moving body, and the fixed arm is attached to the rotation shaft at a position where the auxiliary leg abuts against the floor surface. Configured to engage,
2. The stair transport cart according to claim 1, wherein when the fixed arm is engaged with the rotation shaft, the auxiliary leg supports the mounting portion fixed to the fixed body.

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