JPH09301191A - Carrier for flat and step - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized carrier for a flat and a step which enables smooth hand carrying even in a flat place and a stop without a special equipment such as a protective plate, a non-slip or the like. SOLUTION: Fixed and movable casters 13, 14 are installed on both of front and rear end parts of a base 11. A loading table 12 is installed on the front side of the base 11 in such a manner as to turn on a horizontal shaft 19. A pantagraph jack 17 for elevating the rear side of the loading table 12 is installed on the rear side of the base 11. A sled sliding body is turnably installed on both side end parts of the base 11. The sled sliding body 16 is located in a position separate from the grounding surface (traveling surface) of wheels 13a, 14a during moving on the flay place and located in a position close to the traveling surface during moving on a step by the turning operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport vehicle capable of smoothly moving on level ground and stairs.

[0002]

2. Description of the Related Art FIG. 13 is a schematic view showing a state of carrying luggage in a flat place by a conventional truck, and FIG. 14 is a schematic view showing a state of carrying luggage on a staircase by the conventional truck, in which 1 is a truck. In this cart 1, wheels 2 are provided in front of and behind the load receiving base 1a, and a hand handle 3 is provided on one side of the load receiving base 1a. 4 is a dolly 1
Luggage loaded on the cargo cradle 1a, 5 is a thick protective plate such as a concrete panel laid on stairs, 6 is a band, 7
Is a tow rope.

Next, a conventional carrying operation of luggage by a cart will be described. The luggage 4 is placed on the cargo receiving stand 1a of the carriage 1 and fixed by the band 6. On a flat surface,
As shown in FIG. 3, hold the hand push handle 3 and move it while pushing and pulling. Then, if the luggage 4 is a heavy load, the tow rope 7 is connected, and another worker pulls the tow rope 7
To pull and move. At the stairs, the tow rope 7 is connected to the trolley 1, and the operator holds the hand push handle 3 to push it up, while another worker pulls the tow rope 7 from the upper part of the stairs or the tow equipment (Fig. Install (not shown) and pull the tow rope 7,
Pull up trolley 1. At this time, as soon as the wheel 2 got over the corner of the step and got on the step one step higher, the trolley 1
Will fall by the distance between the back surface of the load receiving platform 1a and the ground contact surface of the wheel 2, and the back surface of the load receiving platform 1a will collide with the corner of the step. In this state, the wheels 2 of the dolly 1 are not in contact with the steps of the stairs, and until the wheels 2 come into contact with the corners of the next steps, the trolley 1 has the back surface of the loading platform 1a at the corners of the steps. You will be climbing while sliding on the part. In this way, the trolley 1 climbs the stairs while repeatedly colliding with the back surface of the load receiving base 1a and the corners of the steps. Therefore, in order to raise the dolly 1 up the stairs, the workability is poor and a great deal of labor is required. Further, the vibration of the trolley 1 is severe, the load 4 may be collapsed, and the cradle 1a and stairs may be damaged. The same applies when the dolly 1 is lowered down the stairs.

Therefore, when the stairs are to be raised, FIG.
As shown in, it is necessary to lay a protective plate 5 on the steps of the stairs to make the stairs a flat inclined surface. Then, the tow rope 7 is connected to the trolley 1, an operator holds the hand handle 3 and pushes the trolley 1 up onto the protection plate 5, and another worker at the top of the stairs pulls the tow rope 7 or the stairs. A tow device is installed on the upper part, and the tow rope 7 is towed, and the trolley | bogie 1 is made to run on the protection plate 5, and it is pulled up. Further, when lowering the stairs, similarly, an operator at the upper part of the stairs sends out the tow rope 7 to run the cart 1 on the protection plate 5 and pulls it down.

[0005]

Since the conventional bogie is constructed as described above, when the stairs are going up and down, the protection plate 5 is laid on the stairs so that the traveling surface of the bogie 1 is flatly inclined. Must be faced. Therefore, every time the stairs are moved up and down, a plurality of protective plates 5 have to be laid out seamlessly over the entire length of the stairs and connected to each other so as not to fall, which requires a great deal of labor. Further, it is necessary to carry the protective plate 5 together with the luggage 4. Further, when the trolley 1 moves on the inclined surface, the cradle 1a also inclines, which makes it easy for the load to collapse, strengthening the fastening of the band 6, and specially attaching equipment such as anti-slip. Must. Thus, in the conventional trolley 1,
It is necessary to carry the protective plate 5 and equipment such as anti-slip, and further to set up the protective plate 5 and equipment such as anti-slip on stairs, which reduces work efficiency and practicality, and increases cost. was there.

The present invention has been made in order to solve the above problems, and can be carried by hand smoothly on a flat place or stairs without using special equipment such as a protective plate or a slip stopper. The purpose is to obtain a small flatland / stairway carrier.

[0007]

According to a first aspect of the present invention, there is provided a flat land / stairway carrier which has a roughly rectangular outer shape, and which is located below the cargo carrier and supports the carrier. Base, casters attached to both front and rear ends of the base, hand-handles attached to the rear end of the base, and a first mounting position where the lower end surface approaches the grounding surface of the caster. And a sled sliding body attached to both end portions of the base so that the lower end surface can be located at two mounting positions, that is, a second mounting position where the lower end surface is separated from the ground contact surface of the caster. is there.

The flat land according to the second aspect of the present invention
The stairway carrier in the first invention is the sled sliding body,
The pedestal is attached to both end portions of the base so as to be rotatable about a rotation axis, and is pivoted in one direction around the rotation axis to be located at a first attachment position. It is configured to be located at the second mounting position by rotating in the other side direction.

Further, the flat land according to the third invention of the present invention
In the stair-carrying vehicle according to the second aspect of the present invention, a flip-up spring that biases the sled slide body to rotate in the other direction around the rotation axis is disposed between the sled slide body and the base. It is what

The flat land according to the fourth aspect of the present invention
In the invention according to any one of the first to third inventions, the stair carrier is rotatable about a horizontal axis in which one end side of the front and rear of the stair carrier is a base, and an axial direction thereof is orthogonal to a vertical plane in the front-rear direction. It is attached to the base and is configured so that its posture with respect to the base can be adjusted by rotating the base about the horizontal axis.

The flat land according to the fifth aspect of the present invention
The stair-carrying vehicle according to the fourth aspect of the present invention, wherein the base of the stairs carrier is a load-bearing-posture adjusting means for raising and lowering the other front and rear ends of the load-bearing pedestal to rotate the load-bearing pedestal around a horizontal axis. Is.

The flat land according to the sixth aspect of the present invention
In the stair-carrying vehicle according to the fifth aspect of the present invention, the cargo receiving tray attitude adjusting means is a pantograph jack.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a side view showing a flatland / staircase carrier according to a first embodiment of the present invention, FIG. 2 is a top view showing a flatland / staircase carrier according to the first embodiment of the present invention, and FIG. III-III arrow sectional drawing, FIG. 4 is IV-I of FIG.
13 is a cross-sectional view taken along the arrow V, in which the same or corresponding parts as those of the conventional bogie shown in FIG. 13 and FIG.

1 and 2, a flat ground / staircase transport vehicle 10 has a base 11 having a substantially rectangular outer shape, and a load receiving base 12 provided on the base 11 and having a substantially rectangular outer shape. It has and. In this base 11, fixed casters 13 are attached to both ends on the front side, and movable casters 14 are attached to both ends on the rear side. A rope hook 15 is provided at the front end of the base 11. Further, the hand push handle 3 is erected on the rear portion of the base 11. Further, sled sliding bodies 16 are attached to both side ends of the base 11, and a pantograph jack 17 as a load receiving tray attitude adjusting means is provided on the base 1.
1 is installed on the rear side upper surface. In addition, a pair of support arms 18 are erected downward on the lower surface on the front side of the load receiving base 12. As shown in FIG. 3, the support arm 18 is pivotally supported by a horizontal shaft 19 attached to the base 11, and the load receiving base 12 is attached to the base 11 so as to be rotatable around the horizontal shaft 19. ing. Further, on the lower surface of the rear side of the cargo receiving table 12, the receiving portion 2 having an arcuate outer peripheral surface in the front-back direction
0 is the pantograph jack 1 as shown in FIG.
It is projected so that it may contact the head of No. 7. Therefore, the load receiving base 12 is supported by the pair of horizontal shafts 19 and 19 and the pantograph jack 17 and arranged on the upper side of the base 11. The axial direction of the horizontal shaft 19 is orthogonal to the vertical plane of the base 11 in the front-rear direction. A plurality of band through holes 21 are formed in the edge portion of the load receiving table 12. A round handle 22 is attached to the tip of the screw rod 17a of the pantograph jack 17.

Next, the construction of the sled sliding member 16 will be described with reference to FIG. The sled sliding body 16 is composed of a sled plate 25 made of a phenol laminated plate or a Teflon surface layer structural plate, and a holding frame 26 for holding the sled plate 25. The sled slide bodies 16 are attached to both side ends of the base 11 so as to be rotatable around a horizontal rotation axis by hinges 27. Further, a flip-up spring 28 is mounted between the sled sliding body 16 and the base 11, and the flip-up spring 28 biases the sled sliding body 16 clockwise in the drawing with a hinge 27 as a rotation center. . And, when moving on a level ground, the sled sliding body 16
Is flipped up by the urging force of the flip-up spring 28, and as shown by the solid line in the figure, the fixed and movable casters 13,
It is located at the second mounting position where the distance h ₁ between the ground contact points of the four wheels 13a, 14a and the sled sliding body 16 increases. Further, when the stairs are moved, the sled slide body 16 is rotated counterclockwise in the drawing with the hinge 27 as the center of rotation against the biasing force of the flip-up spring 28, and the first mounting position shown by the broken line in the drawing. And is fixed to the base 11 by a simple fixing means (not shown) such as a hook or a screw. At this time, the wheels 13a,
The distance h ₂ between the ground contact point of 14a and the sled sliding body 16 becomes small. Here, the distance h ₀ between the grounding points of the wheels 13a and 14a and the base 11 is about 60 mm, and the distance h ₁ between the grounding points of the wheels 13a and 14a and the sled sliding body 16 at the second mounting position is almost the same. The distance h ₀ is set to be equal to the distance h ₀ , and the distance h ₂ between the ground contact points of the wheels 13a and 14a and the sled sliding body 16 at the first mounting position is set to 5 to 8 mm. Further, the length of the sled plate 25 of the sled sliding body 16 is determined by the wheel 13
It is almost equal to the distance between the rotation centers of a and 14a. Further, in the first mounting position, the sled sliding body 16
Are located outside the wheels 13a, 14a.

Next, the movement operation of the flatland / staircase transport vehicle 10 according to the first embodiment will be described. Operate the round handle 22 to lower the pantograph jack 17,
The cradle 12 is positioned horizontally. Further, the sled sliding body 16 is flipped up by the urging force of the flip-up spring 28 and is located at the second mounting position shown by the solid line in FIG. Then, the baggage is placed on the loading tray 12 and the band is fixed through the band passing hole 21. On level ground, the level ground / stairway carrier 10 is moved in the same manner as the conventional carriage 1. At this time, since the sled sliding body 16 is flipped up,
You can move smoothly without colliding with some irregularities on the road. Further, since the movable casters 14 are mounted, the direction can be easily changed.

Then, when it is moved to immediately before the stairs, the sled sliding body 16 is rotated around the hinge 27 and fixed at the first mounting position shown by the broken line in FIG. Further, the round handle 22 is operated to raise the pantograph jack 17. Then, the receiving tray 12 is the pantograph jack 1
7 is pushed up via the receiving part 20 and the horizontal shaft 19
It rotates around and as shown by the broken line in FIG.
Lean against. In the pantograph jack 17, the inclination of the loading tray 12 is raised to about 1/2 of the inclination angle of the stairs. Then, the worker holds the hand-pushed handle 3 and pushes up the flatland / staircase carrier 10 from the front side thereof to the stairs. At this time, if necessary, the tow rope is hung on the rope hook 15 and another worker pulls the tow rope from the upper part of the stairs. And flat land / stairway carrier 1
While 0 is moving on the stairs, the loading tray 12 is almost horizontal. As soon as the wheels 13a, 14a climbed over the corner of the step and climbed to the step one step higher, the level ground / stairway transport vehicle 10 dropped, and the front end surface of the sled plate 25 of the sled sliding body 16 reached the corner of the step. Abut the part. In this state, the wheels 13
a and 14a are not in contact with the steps of the stairs and the wheels 13
Until a and 14a contact the corner of the next step, the front end surface of the sled plate 25 slides up on the corner of the step.

The distance h ₂ between the ground contact points of the wheels 13a and 14a and the sled sliding member 16 is set to be ₅ to 8 mm, and the length of the sled plate 25 is the distance between the centers of rotation of the wheels 13a and 14a. Therefore, the amount of fall of the flat ground / staircase transport vehicle 10 is extremely small, and the dropped flatland / stairway transport vehicle 10 can be quickly received by the tip of the sled plate 25. Therefore, the impact applied to the level ground / stairs carrier 10 is significantly reduced. Moreover, the wheels 13a, 14a is height to overcome corners of the steps are low (consistent with the distance h _2), and, without the corners of the sled plate 25 is caught between the corner portion of the step of the stairs, working The person's pushing up force and traction force are reduced. In this way, the flatland / staircase transport vehicle 10 can smoothly climb the stairs without being applied with a large impact. When the stairs are raised, the round handle 22 is operated to lower the pantograph jack 17 until the load receiving base 12 is in the horizontal state. Then, the sled sliding body 16 is released from the fixed state, and the sled sliding body 1 is released.
Make 6 jump up. After that, the level ground / stairway carrier 10 is moved to level ground.

When lowering the stairs carrier 10 on the level ground, just like the above, just before the stairs, the loading platform 1 is installed.
2 is inclined to about 1/2 of the inclination angle of the stairs, and the sled sliding body 16 is rotated to be located at the first mounting position and fixed to the lower side of the base 11. Then, if necessary, a tow rope is hung on the rope hook 15, and while the tow rope is being fed out, the handrail handle 3 side, that is, the rear side is down, and the flatland / stairway transport vehicle 10 is lowered. When the stairs are down, operate the round handle 22 to
The pantograph jack 17 is lowered until the horizontal position is reached. Then, the sled sliding body 16 is released from the fixed state and the sled sliding body 16 is flipped up. After that, on level ground / stairway carrier 1
0 will be moved to the level ground.

As described above, according to the first embodiment,
When going up and down the stairs, the tip surface and the wheels 13a, 1
Since the sled sliding body 16 attached to the base 11 is provided so as to be located at the first attachment position where the distance from the grounding point of 4a is reduced, without laying the protective plate 5 on the step of the stairs, You can move up and down stairs smoothly with a small amount of shock. Further, since the sled sliding body 16 is mounted on the base 11 so as to be located at the second mounting position where the distance between the tip surface of the sled body 16 and the grounding points of the wheels 13a, 14a becomes large, the sled sliding body 16 may be slightly uneven on the flat road. You can move smoothly without collision. Therefore, there is no need to carry out setup such as transporting the protective plate 5 or laying the protective plate 5 on stairs, suppressing the occurrence of load collapse, improving work efficiency and practicality, and being inexpensive and small in size, on level ground, stairs, level ground. Therefore, there is an effect that it is possible to obtain a flat land / stairway carrier that can be continuously transported by hand. Further, the front end surface of the sled sliding body 16 and the wheels 13a, 1
Since there is a gap between the ground contact point 4a and the ground contact point, the sled slide body 16 is not attached to the first and second mounting positions when shifting from level ground movement to stair movement or from stair movement to level ground movement. The load can be set, and the workability of setting the sled sliding body 16 can be improved. Further, since the sled plate 25 of the sled sliding body 16 is composed of a phenol laminated plate or a structural plate of Teflon surface layer, it does not damage the corners of the steps of the stairs, and the flat land / stairway carrier 10 further stairs. The corners of the step can be smoothly slid and moved, and the labor of the operator can be reduced. Further, since the flip-up spring 28 is mounted between the sled sliding body 16 and the base 11, it is only necessary to release the fixing of the sled sliding body 16 to the base 11 when shifting from stair movement to level ground movement. Thus, the sled sliding body 16 is flipped up so that the sled body 16 can quickly move to the flat ground, and the workability can be improved. Further, since the sled sliding body 16 is located outside the wheels 13a and 14a at the first mounting position, the straddling width becomes large when sliding the corners of the steps of the stairs, and stability during sliding is ensured. It is possible to improve the sex.

The pantograph jack 17 has a base 1
1, the loading platform 12 is mounted on the base 11 and the horizontal axis 1
Since it is attached so as to be rotatable around 9, the posture of the loading platform 12 is adjusted so as to compensate or reduce the inclination of the traveling path, that is, the stairs, and the loading platform 12 is placed in a state in which it is almost horizontal so that the stairs can rise and fall. Therefore, the occurrence of load collapse can be suppressed without using a special device such as a slip stopper for luggage. Further, since the receiving portion 20 having an arcuate outer peripheral shape is provided in the front-rear direction in a projecting manner at the portion of the load receiving base 12 with which the head of the pantograph jack 17 abuts, the load receiving base 12 moves along the horizontal axis in accordance with the lifting operation of the pantograph jack 17. 1
It can rotate around 9 smoothly.

Embodiment 2 FIG. In the first embodiment, the sled slide body 16 is attached to the base 11 so as to be rotatable around the horizontal rotation axis of the hinge 27, but in the second embodiment, the sled slide body is mounted. 16 is detachably attached to the base 11. In the second embodiment, as shown in FIG. 7, the mounting bolts 30 are erected on the upper and lower surfaces of both ends of the base 11, and the mounting bolts 30 are inserted into the holding frame 26 of the sled sliding body 16. Has a hole. Then, when the stairs are moved, as shown by the solid line in FIG. 7, the sled sliding body 16 is directed to the lower surface of the base 11 so that the mounting bolt 30 is inserted through the through hole, and the mounting bolt 30 is projected from the through hole. The sled slide body 16 is attached to the first attachment position by tightening the nut 31 on the portion. Therefore, a distance h ₂ between the tip surface of the sled sliding body 16 and the ground contact points of the wheels 13a and 14a is secured. Further, when moving on a level ground, as shown by a broken line in FIG. 7, the sled sliding body 16 is directed to the upper surface of the base 11 so that the mounting bolt 30 is inserted through the through hole, and the mounting bolt 30 is projected from the through hole. The sled slide body 16 is attached to the second attachment position by tightening the nut 31 on the portion.

As described above, according to the second embodiment,
Compared to the first embodiment, the sled slide body 16 needs to be attached and detached at the time of transition from level ground movement to stairway movement and at the time of transition from stairway movement to level ground movement, which is a little complicated in terms of workability. However, in other points, the first embodiment described above is used.
The same effect can be obtained.

Embodiment 3. In the first embodiment, the rear side of the load receiving base 12 is supported by the pantograph jack 17, but in the third embodiment,
The pantograph jack 17 is used only for rotating the load receiving base 12, and the supporting means for the load receiving base 12 is provided on the rear side of the base 11. In the third embodiment, as shown in FIG. 8, the support rod 32 as the support means is the base 1.
1 are attached to both ends on the rear side. The support rod 32 includes a cylindrical first tubular body 32a and a second tubular body 32 housed in the first tubular body 32a so as to be retractable.
b. Through holes 34 are formed in the upper portion of the first pipe 32a, and through holes 35 are formed in the second pipe 32b at a predetermined pitch. The lower end of the first pipe 32a is attached to the base 11 so as to be rotatable around the horizontal axis 33, and the upper end of the second pipe 32b is attached to the load receiving base 1.
It is fixed to 2.

In the third embodiment, the load receiving base 12 rotates in accordance with the raising / lowering operation of the pantograph jack 17. In accordance with the rotating operation of the load receiving table 12, the first pipe body 32a rotates about the horizontal axis 33, and the second pipe body 32b moves in and out of the first pipe body 32a. At this time, the ascending / descending operation of the pantograph jack 17 is stopped at a time point when the through holes 34 and 35 of the first and second pipe bodies 32a and 32b coincide with each other in the vicinity where the inclination of the load receiving base 12 coincides with the inclination of the stairs. To be done. Therefore, by inserting locking pins (not shown) into the through holes 34 and 35, the second pipe body 32b is integrated with the first pipe body 32a, and the load receiving base 12
Are supported on both ends of the rear portion of the base 11 via the support rods 32.

As described above, according to the third embodiment,
Since the rear side of the load receiving base 12 is supported by the support rods 32 provided upright on both ends of the rear side of the base 11, the load receiving base 12
Are firmly supported by the base 11. Therefore, even if the pantograph jack 17 is lowered by operating the round handle 22 by mistake, the cargo cradle 12 does not lower and the transportation stability is improved.

Embodiment 4 FIG. 9 is a partially cutaway perspective view showing a mounting state of a sled slide body at a second mounting position in a flatland / stairway transport vehicle according to Embodiment 4 of the present invention, and FIG. 10 is related to Embodiment 4 of the present invention. FIG. 11 is a partially broken perspective view showing a mounting state of a sled sliding body at a first mounting position in a flatland / stairway carrier, and FIG. 11 is a jig for fixing sledging body in a flatland / stairway carrier according to Embodiment 4 of the present invention. FIG.

In the figure, reference numeral 40 designates a sled sliding member which is attached to both end portions of the base 11 so as to be rotatable about a horizontal rotating shaft by a hinge 27.
Although not shown, it is composed of a sled plate and a holding frame similarly to the sled sliding body 16 shown in FIG. Then, a flip-up spring (not shown) is mounted between the sled sliding body 40 and the base 11, and the sled sliding body 40 stands up upward with respect to the base 11 with the hinge 27 as a rotation center. Biased in the direction. Further, one sled sliding body 40 has a through hole 41.
And an opening 42 are bored. Reference numeral 43 is a magnet embedded in the vicinity of the through hole 41 of the one sled sliding body 40. Four
Reference numeral 4 denotes a fixing jig for fixing the sled sliding body 40 to the first and second mounting positions. In this fixing jig 44, three sled fixing rods 45 a, 45 b, 45 c are three-dimensionally connected by a hinge 46. The chain 47 is swingably connected to the sled slide body 45c, and a weight 48 having a diameter larger than that of the through hole 41 is attached to the tip of the chain 47. Further, in this fixing jig 44, the end portion of the sled fixing rod 45a is hinged to the other sled sliding member 4 by means of a hinge 46.
0, and the chain 47 is inserted into and attached to the through hole 41 of one sled sliding body 40. The other configuration is the same as that of the first embodiment.

Here, the fixing operation of the sled sliding body 40 will be described with reference to FIG. When moving on a level ground, as shown in FIG. 9 and FIG.
0 and 40 are rotated around the hinge 27 by the urging force of the flip-up spring, and are in a state of standing upward on both side end portions of the base 11. At this time, one end of the fixing jig 44 is fixed to the sled sliding body 40 via the hinge 46 to the other, and the weight 48 at the other end is engaged with the through hole 41 and locked to one sled sliding body 40. The slack at the bottom of the base 11 is suppressed. When moving the stairs, first, the other sled sliding body 40 is rotated around the hinge 27 in a direction in which the sled sliding body 40 is hung down via the base 11. At this time, the fixing jig 44, as shown in FIG. 12B, bends at the hinges 46 and moves down as a whole. Then, as shown in FIG. 12C, the other sled sliding body 40 is in a suspended state, and the sled fixing rod 45b of the fixing jig 44 is in contact with the floor surface. Next, as shown in FIG. 12D, one sled sliding body 40 is rotated around the hinge 27 in the direction in which it is suspended with respect to the base 11. Then, after one sled sliding body 40 is in a hanging state, the weight 48 is pulled and the chain 47 and the sled fixing rod 45c are pulled out from the through hole 41. At this time, the sled fixing rods 45a, 45b, and 26c are not shown in FIG.
As shown in (e) of FIG. Therefore, the sled fixing rod 45c is bent along the hinge 46 between the sled fixing rods 45b and 45c so that the sled fixing rod 45c extends along the wall surface of one sled sliding body 40. The sled fixing rod 45c is attracted and fixed to the magnet 43. Further, the weight 48 is dropped into the base 11 side through the opening 42. The weight of the weight 48 pulls the chain 47 toward the base 11 through the opening 42, and the sled sliding body 40 is set to the first mounting position as shown in FIGS. 10 and 12 (f). , Move to stairs movement.

In addition, when shifting to the level ground movement, the weight 4
By pulling out the chain 47 until 8 comes into contact with the through hole 41, and pulling the sled fixing rod 45c away from the magnet 43, the sled sliding body 40 is unfixed. Then, the sled fixing rod 45c and the chain 47 are fed from the through hole 41 to the base 11 side in accordance with the pivotal movement of the sled sliding body 40 around the hinge 27 by the biasing force of the flip-up spring. Therefore, the sled sliding body 40 is in an upright state as shown in (a) of FIG. 9 and FIG. 12, is set to the second mounting position, and shifts to the level ground movement.

As described above, according to the fourth embodiment,
Since the sled fixing rod 45c of the fixing jig 44 is magnetically attracted and fixed to the magnet 43, compared with the first embodiment,
It is possible to obtain the effect of simplifying the work for setting the sled sliding body 40 at the time of transition from the flatland movement to the staircase movement and at the transition from the staircase transition to the flatland transition.

Although the base 11 has a substantially rectangular outer shape in each of the above-described embodiments, the base 11 does not necessarily have a rectangular outer shape, and the base 12 of the load receiving base 12 is not necessarily required. Any shape may be used as long as it can support and mount the sled sliding body 16 and the pantograph jack 17. Further, in each of the above-described embodiments, the sled slide body 16 is attached to the base 11 so as to be rotatable around the horizontal pivot axis of the hinge 27, but the pivot axis of the hinge 27 is the axial direction. Does not necessarily have to be horizontal, and when the sled sliding body 16 is in the first mounting position, the front end surface of the sled plate 25 is the wheel 13
It suffices if it is parallel to the ground contact surfaces of a and 14a, that is, the running surface. Further, in each of the above-described embodiments, the loading tray 12
Is attached to the front side of the base 11 so as to be rotatable around the horizontal axis 19, but the load receiving base 12 is attached to the rear side of the base 11 so as to be rotatable around the horizontal axis 19. Good. In this case, the pantograph jack 17 may be installed on the front side of the base 11.

[0033]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, the load receiving base having a substantially rectangular outer shape, the base positioned below the load receiving base and supporting the load receiving base, and both front and rear ends of the base. Side casters, a hand push handle attached to the rear end side of the base, a first mounting position where the lower end surface approaches the ground contact surface of the caster, and the lower end surface from the ground contact surface of the caster. Since the sled slides are respectively attached to both end portions of the base so that they can be positioned at two mounting positions, that is, a second mounting position that is separated from each other, a protective plate can be carried or a protective plate on stairs. No need for setup such as laying down the load, the occurrence of load collapse is suppressed, work efficiency and practicality are improved, it is cheap and compact, and it is a flat / stairway carrier that can be continuously hand-carried on level ground, stairs, and level ground. Is obtained.

According to a second aspect of the present invention, in the first aspect, the sled slide body is attached to both side end portions of the base so as to be rotatable about a rotation axis. It is configured to be located at a first mounting position by being rotated in one direction around the moving shaft, and to be located in a second mounting position by being rotated in another direction around the rotating shaft. Therefore, the sled slide body can be easily replaced from the first mounting position to the second mounting position, or from the second mounting position to the first mounting position, and the workability can be improved.

According to a third aspect of the present invention, in the second aspect of the invention, the flip-up spring for urging the sled sliding body to rotate in the other direction around the rotation axis is slid. Since it is arranged between the moving body and the base, when the stairs move to the level ground movement, the sled sliding body is simply lifted up to release the sled sliding body from the base, and the sled sliding body is swung up quickly. It becomes possible to move, and workability can be further improved.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the invention, the load receiving base has a front and rear one end side which is a base and a vertical axial direction. It is mounted rotatably around a horizontal axis that is orthogonal to the plane, and is configured so that the posture with respect to the base can be adjusted by rotating around the horizontal axis. It can be adjusted so that it is in a horizontal state, and the occurrence of load collapse can be suppressed.

Further, according to a fifth aspect of the present invention, in the fourth aspect of the invention, the posture of the cargo receiving tray is adjusted by raising and lowering the other front and rear ends of the cargo receiving tray to rotate the cargo receiving tray around a horizontal axis. Since the means is arranged on the base, the posture of the load receiving base can be easily adjusted.

Further, according to the sixth aspect of the present invention, in the fifth aspect of the present invention, since the load-bearing-basket posture adjusting means is a pantograph jack, the posture of the load-bearing cradle can be adjusted more easily.

[Brief description of drawings]

FIG. 1 is a side view showing a flatland / staircase carrier according to a first embodiment of the present invention.

FIG. 2 is a top view showing a flatland / staircase transport vehicle according to Embodiment 1 of the present invention.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

FIG. 5 is a view for explaining the operation of the sled sliding body in the flatland / staircase transport vehicle according to Embodiment 1 of the present invention.

FIG. 6 is a diagram for explaining an operation of stair movement in the flatland / staircase transport vehicle according to the first embodiment of the present invention.

FIG. 7 is a diagram for explaining the operation of the sled sliding body in the flatland / staircase transport vehicle according to Embodiment 2 of the present invention.

[Fig. 8] Fig. 8 is a diagram for explaining the posture adjusting operation of the load receiving base in the flat ground / staircase transport vehicle according to Embodiment 3 of the present invention.

FIG. 9 is a partially cutaway perspective view showing a mounting state of a sled sliding body at a second mounting position in a flat-land / stairway transport vehicle according to Embodiment 4 of the present invention.

FIG. 10 is a partially cutaway perspective view showing a mounting state of a sled sliding body at a first mounting position in a flat-land / stairway transport vehicle according to Embodiment 4 of the present invention.

FIG. 11 is a plan view showing a sled slide body fixing jig in a flatland / stairway transport vehicle according to Embodiment 4 of the present invention.

FIG. 12 is a diagram illustrating a method of fixing a sled slide body in a flatland / stairway transport vehicle according to Embodiment 4 of the present invention.

FIG. 13 is a schematic diagram showing a state of carrying luggage in a flat place by a conventional cart.

FIG. 14 is a schematic diagram showing a state of carrying luggage on stairs by a conventional cart.

[Explanation of symbols]

3 handwheels, 10 level ground / stairway transport vehicles, 11
Base, 12 load receiving base, 13 fixed caster, 14 movable caster, 16, 40 sled sliding body, 17 pantograph jack (load receiving position adjusting means), 19 horizontal axis,
27 Hinge, 28 Bounce spring.

Claims (6)

[Claims] 1. A load receiving base having a substantially rectangular outer shape, a base positioned below the load receiving base and supporting the load receiving base, and casters attached to both front and rear end sides of the base. A hand handle attached to the rear end side of the base, a first attachment position where the lower end surface approaches the ground contact surface of the caster, and a second mounting position where the lower end surface separates from the ground contact surface of the caster.
And a sled slide body attached to each of both end portions of the base so as to be located at two attachment positions. 2. The sled slide body is attached to both side ends of the base so as to be rotatable around a rotation axis, and is rotated in one direction around the rotation axis to move the first slidable body. 2. The flat ground / stairs according to claim 1, characterized in that it is located at the mounting position of and is positioned at the second mounting position by rotating in the other direction around the rotating shaft. Carrier. 3. A flip-up spring for urging the sled sliding body to rotate in the other direction around the rotary shaft is provided between the sled sliding body and the base. The flatland / stairway carrier according to claim 2. 4. The load receiving pedestal is attached at its front and rear one end sides to the base rotatably about a horizontal axis orthogonal to a vertical plane of the front-rear direction, and is rotatable around the horizontal axis. The flatland / stairway transport vehicle according to any one of claims 1 to 3, wherein the posture of the flatbed is adjusted with respect to the base. 5. A load carrier posture adjusting means for raising and lowering the other front and rear ends of the load carrier to rotate the load carrier around the horizontal axis is provided on the base. The flatland / stairway carrier according to claim 4. 6. The flatland / staircase transport vehicle according to claim 5, wherein the load receiving tray attitude adjusting means is a pantograph jack.