Mobile

Abstract

To provide a movable body that can accumulate compressed air during moving.SOLUTION: A movable body includes: a wagon with wheels; a pump configured to be driven by the wheels to compress air; a tank configured to accumulate the compressed air by the pump; and an actuator configured to operate by the air supplied from the tank.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to mobile objects. [Background technology]

[0002] Conventionally, a moving body using a pneumatic actuator is known (see, for example, Patent Document 1). The moving body of Patent Document 1 includes a cart, a lift mechanism attached to the cart, and a pneumatic actuator that raises and lowers the lift mechanism. The moving body of Patent Document 1 supplies compressed air to the pneumatic actuator, which operates the actuator to raise the lift mechanism. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-139002 A Summary of the Invention [Problem to be solved by the invention]

[0004] The moving body of Patent Document 1 operates the actuator using compressed air used in factories, etc. For this reason, it is necessary to supply compressed air from outside the moving body.

[0005] An object of the present disclosure is to provide a moving body capable of storing compressed air while moving. [Means for solving the problem]

[0006] The moving body of the present disclosure includes a cart having wheels, a pump driven by the wheels to compress air, a tank to store the air compressed by the pump, and an actuator operated by air supplied from the tank.

[0007] According to this moving body, it is possible to accumulate compressed air to be supplied to the actuator when the moving body moves, which eliminates the need to supply compressed air from outside the moving body. Effect of the Invention

[0008] According to the present disclosure, a moving body capable of storing compressed air during movement can be provided. [Brief description of the drawings]

[0009] [Figure 1] 1 is an overall view of a moving body according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a top view of a dolly according to an embodiment of the present disclosure. [Diagram 3] FIG. 1 is a diagram of a pressure accumulation system for a moving body according to an embodiment of the present disclosure. [Figure 4] 4A to 4C are diagrams illustrating a driving state of a pump according to an embodiment of the present disclosure. [Diagram 5] FIG. 4 is a diagram showing a pressure accumulation state of the pressure accumulation system according to the embodiment of the present disclosure. [Figure 6] FIG. 2 is a schematic diagram illustrating a first locking mechanism according to an embodiment of the present disclosure. [Figure 7] FIG. 4 is a schematic diagram illustrating a second locking mechanism according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the following description, the moving direction of the moving body 1 is indicated as F in the drawings. The width direction of the moving body 1 is indicated as W in the drawings, the right side of the moving direction F is indicated as R, and the left side is indicated as L. Furthermore, the vertical direction of the vehicle is indicated as G in the drawings, and the upper side is indicated as U in the drawings.

[0011] As shown in FIGS. 1 and 2, the moving body 1 includes a cart 2, a pressure accumulation system 4, an actuator 6, a rotating body 8, a support shaft 10, a lift mechanism 12, and an upper frame 14.

[0012] In this embodiment, the movable body 1 has a box 14a fixed to an upper frame 14, and stores and transports waste in the box 14a. In this embodiment, the movable body 1 is a hand-pushed type movable body 1 that is pushed by an operator operating a handle H. However, the movable body 1 may be any type of movable body that moves while compressing air.

[0013] 2, the dolly 2 has a lower frame 24, rear wheels (an example of wheels) 26, and front wheels 28. The lower frame 24 supports various devices of the moving body 1. In this embodiment, the lower frame 24 is a cross-shaped member made of metal such as iron or aluminum.

[0014] The rear wheels 26 are fixed to the lower frame 24 via two bearings 26a and 26b. In this embodiment, the rear wheels 26 are provided one on each side in the width direction W. A first sprocket 26d is fixed to an axle 26c of the rear wheels 26.

[0015] The front wheels 28 are provided in front of the lower frame 24 and steer the moving body 1. In this embodiment, the front wheels 28 are caster-type wheels that can rotate left and right relative to the lower frame 24.

[0016] 3, the pressure accumulation system 4 is a device that accumulates compressed air by utilizing the rotation of the rear wheel 26. The pressure accumulation system 4 includes a pump 16, a tank 18, a first check valve 20, a second check valve 22, a relief valve 29, a first switch 30, a second switch 32, and a directional switching valve 34. In this specification, "upstream" refers to the side where air is sucked in, and "downstream" refers to the actuator 6 side.

[0017] The pump 16 is driven by the rear wheel 26 and compresses air drawn from the atmosphere. The pump 16 of this embodiment is driven by a rotor 8 that is driven by the rear wheel 26. The pump 16 has a piston 16a, a shaft 16b, and a cylinder 16c. The shaft 16b is fixed to the piston 16a. The piston 16a is housed in the cylinder 16c.

[0018] The cylinder 16c has a first chamber 16d on the side where the shaft 16b of the piston 16a is fixed, and a second chamber 16e on the opposite side of the first chamber 16d and the piston 16a. The first check valve 20 is provided in a passage connecting the atmosphere upstream of the cylinder 16c and the pump 16, and is a valve that prevents air from flowing back from the cylinder 16c to the atmosphere. The second check valve 22 is provided in a passage connecting the pump 16 downstream of the cylinder 16c and the tank 18, and is a valve that prevents air from flowing back to the cylinder 16c.

[0019] In this embodiment, a first check valve 20 and a second check valve 22 are connected to the first chamber 16d and the second chamber 16e, respectively. This allows the piston 16a to slide, and the air sucked into the first chamber 16d and the second chamber 16e of the cylinder 16c does not flow back to the atmosphere. Therefore, in the pressure accumulation system 4, both the first chamber 16d and the second chamber 16e are compression chambers.

[0020] The tank 18 is provided downstream of the pump 16 and accumulates the air compressed by the pump 16. The relief valve 29 is provided on a passage between the pump 16 and the tank 18, and the air accumulated in the tank 18 is released to the atmosphere by switching the relief valve 29 from the pump 16 side to the atmosphere side. In this embodiment, the relief valve 29 is a manual relief valve that is manually switched by an operator. However, the relief valve 29 may be an electromagnetic relief valve.

[0021] The first switch 30, the second switch 32, and the directional control valve 34 are control devices for flowing the air stored in the tank 18 to the actuator 6. The first switch 30, the second switch 32, and the directional control valve 34 may be control valves used in conventional pneumatic devices, and therefore a description thereof will be omitted.

[0022] The actuator 6 has an actuator rod 6a, an actuator piston 6b fixed to the actuator rod 6a, and a cylinder 6c that accommodates the actuator piston 6b. In this embodiment, the actuator 6 is a device for moving the lift mechanism 12 up and down. In this embodiment, the actuators 6 are provided at the front and rear of the lift mechanism 12, respectively, and support a joint shaft 12b of the lift mechanism 12, which will be described later. In this embodiment, when the second switch 32 is pressed, air is supplied to the cylinder chamber 6d in which the actuator rod 6a of the actuator 6 operates in the pushing direction. When the first switch 30 is pressed, air is supplied to the cylinder chamber 6e in which the actuator rod 6a of the actuator 6 operates in the retracting direction.

[0023] As shown in FIG. 2, the rotating body 8 is a disk supported by the lower frame 24 via bearings 8a and 8b. A second sprocket 8d is fixed to the shaft 8c of the rotating body 8. A chain C (see FIG. 1) is wound around the second sprocket 8d together with a first sprocket 26d of the rear wheel 26. This causes the rotating body 8 to rotate in accordance with the rotation of the rear wheel 26. In this embodiment, the number of teeth of the first sprocket 26d and the number of teeth of the second sprocket 8d are set to a ratio of 1:4. This prevents the force pushing the moving body 1 from increasing excessively. However, the number of teeth may be set appropriately depending on the compression capacity of the pump 16 and the force pushing the moving body 1.

[0024] The rotor 8 is connected to the shaft 16b of the pump 16, and reciprocates the shaft 16b of the pump 16. In this embodiment, the rotor 8 and the pump 16 are provided on the left and right sides of the width direction W, respectively. This doubles the capacity to store air in the tank 18. In this embodiment, the pump 16 is provided in front of the rotor 8, and the shaft 16b extends to the side opposite the rear wheel 26 (the front side in this embodiment). By arranging the pump 16 in this manner, the distance between the axis 26c of the rear wheel 26 and the axis 8c of the rotor 8 can be shortened, and the length of the moving body 1 in the moving direction F can be reduced.

[0025] 1 and 4, the support shaft 10 extends in the width direction W of the lower frame 24 and passes through a bearing fixed to the cylinder 16c of the pump 16. This allows the cylinder 16c of the pump 16 to be supported on the lower frame 24 so as to be able to swing.

[0026] The lift mechanism 12 is a mechanism for raising and lowering the upper frame 14. The lift mechanism 12 in this embodiment is a pantograph type lift mechanism 12 including a plurality of arms 12a, joint shafts 12b connecting the arms 12a, and cross shafts (an example of shaft members) 12c supporting the crossing portions of the arms 12a.

[0027] The front end (an example of a first end) of the upper frame 14 is rotatably connected to the lift mechanism 12. This allows the rear end (an example of a second end) of the upper frame 14 opposite the front end to move in a direction away from the lift mechanism 12. This allows the upper frame 14 to tilt when an operator lifts the rear end of the upper frame 14. In this manner, by tilting the upper frame 14, in this embodiment, waste is flushed from a box 14a provided on the upper frame 14 into a trash can.

[0028] The lift mechanism 12 has a first lock mechanism 36 and a second lock mechanism 38. As shown in FIG. 6, the first lock mechanism 36 engages with the cross shaft 12c when the lift mechanism 12 is raised. In this embodiment, the first lock mechanism 36 has a rod-shaped member 36b with a U-shaped first cutout portion 36a at its tip, which is rotatably supported by the cross shaft 12c. The first cutout portion 36a engages with the cross shaft 12c below, thereby connecting the upper and lower cross shafts 12c. This allows the rod-shaped member to function as a support rod, preventing the lift mechanism 12 from descending.

[0029] The first locking mechanism 36 also has an unlocking mechanism 36c. The unlocking mechanism 36c moves the rod-shaped member 36b in the rotational direction to separate the first notch portion 36a engaged with the intersecting shaft 12c from the intersecting shaft 12c. This causes the first locking mechanism 36 to move from a locked state to an unlocked state. In this embodiment, the unlocking mechanism 36c is a wire fixed to the rod-shaped member 36b, and pulling the wire rotates the rod-shaped member 32b, causing the first locking mechanism 36 to enter the unlocked state.

[0030] 7, the second locking mechanism 38 prevents the upper frame 14 from approaching the lift mechanism 12 when the upper frame 14 is tilted in a direction away from the lift mechanism 12. In this embodiment, a rod-shaped member 38c having a U-shaped second cutout portion 38a and a triangular cap 38b covering the U-shaped second cutout portion 38a is rotatably supported by the upper frame 14. The switching of the second locking mechanism 38 from the locked state to the unlocked state will be described later.

[0031] In the movable body 1 configured in this manner, when an operator pushes the movable body 1, the rear wheel 26 rotates. As shown in Fig. 4, when the rear wheel 26 rotates, a first sprocket 26d provided coaxially with the rear wheel 26 rotates. When the first sprocket 26d rotates, the second sprocket 8d rotates via the chain C, and the rotor 8 provided coaxially with the second sprocket 8d rotates.

[0032] As shown in FIG. 4(a), when the rotor 8 rotates, the shaft 16b rotatably supported by the rotor 8 is pushed in the rotation direction. In this embodiment, the shaft 16b is pushed in the moving direction F of the moving body 1. As shown in FIG. 4(b) to FIG. 4(d), the shaft 16b converts the circular motion of the rotor 8 into a reciprocating motion. In response to this, the piston 16a slides in the cylinder 16c. At this time, the cylinder 16c swings up and down around the support shaft 10 in accordance with the inclination of the shaft 16b.

[0033] 5(a), when the piston 16a starts to slide from the bottom on the second chamber 16e side, it starts to suck in the atmosphere through the first check valve 20 connected to the second chamber 16e. On the other hand, if the first chamber 16d side is filled with the atmosphere, the piston 16a starts to compress the air in the first chamber 16d, and at the same time, the air in the first chamber 16d is sent to the tank 18.

[0034] 5(b), when the piston 16a slides toward the first chamber 16d, the air in the first chamber 16d is compressed and passes through the second check valve 22 connected to the first chamber 16d, and is sent to the tank 18. At this time, the second check valve 22 connected to the second chamber 16e prevents the air from flowing back from the tank 18 toward the pump 16, and therefore prevents the air sent from the first chamber 16d from entering the second chamber 16e.

[0035] As shown in Fig. 5(c), when the piston 16a advances to the bottom of the first chamber 16d, the air in the first chamber 16d finishes being sent to the tank 18, and at the same time, the second chamber 16e is filled with air. As shown in Fig. 5(d), when the piston 16a advances toward the second chamber 16e, the piston 16a starts compressing the second chamber 16e, and at the same time, the air in the second chamber 16e is sent to the tank 18.

[0036] As shown in Figures 5(e) and 5(f), when the piston 16a slides toward the second chamber 16e, the air in the second chamber 16e is compressed and passes through the second check valve 22 connected to the second chamber 16e, and is sent to the tank 18. Then, the state returns to that of Figure 5(a), and compression of the first chamber 16d begins.

[0037] The moving body 1 repeats this cycle while the rear wheels 26 are rotating, thereby storing air in the tank 18. The pressure stored in the tank 18 may be set appropriately depending on the capacity of the pump 16, etc.

[0038] As shown in FIG. 3, when the second switch 32 is pressed by an operator of the movable body 1, the actuator rod 6a of the actuator 6 is pushed out, and the lift mechanism 12 is raised.

[0039] As shown in FIG. 6(a), at this time, the weight of the rod-shaped member 36b of the first locking mechanism 36 causes the rod-shaped member 36b to rotate toward the intersecting shaft 12c. In this embodiment, the rod-shaped member 36b rotates clockwise. When the rod-shaped member 36b rotates, the first cutout portion 36a engages with the intersecting shaft 12c, and the first locking mechanism 36 enters a locked state. This locks the lift mechanism 12 so that it cannot descend. Therefore, after the lift mechanism 12 has finished ascending, the movable body 1 will not descend regardless of the presence or absence of air pressure in the actuator 6.

[0040] Next, as shown in FIG. 7, the box 14a is tilted by the worker, so that the waste in the box 14a falls into a trash can or the like. At this time, as shown in FIG. 7(a), the rod-shaped member 38c of the second locking mechanism 38 is lifted together with the upper frame 14 and rotates by its own weight. In this embodiment, the rod-shaped member 38c rotates counterclockwise. When the rod-shaped member 38c rotates, the upper surface 38d (see also FIG. 7(c)) of the cap 38b is caught on the cross shaft 12c and rotates. In this embodiment, the cap 38b rotates clockwise. As a result, the second cutout portion 38a covered by the cap 38b is exposed. When the upper frame 14 is lowered by the worker in the state in which the second cutout portion 38a is exposed, the second cutout portion 38a engages with the cross shaft 12c. As a result, the second locking mechanism 38 is moved from the unlocked state to the locked state. By operating in this manner, the second locking mechanism 38 can prevent the upper frame 14 from descending toward the lift mechanism 12.

[0041] As shown in FIG. 7(b), when the upper frame 14 is further raised by the operator, the cap 38b rotates. In this embodiment, the cap 38b rotates counterclockwise. When the cap 38b rotates, the cap 38b covers the second cutout portion 38a. In this manner, the second lock mechanism 38 transitions from a locked state to an unlocked state. When the upper frame 14 is lowered by the operator in a state in which the cap 38b covers the second cutout portion 38a, the bottom surface 38e of the cap 38b slides on the cross shaft 12c, and the rod-shaped member 38c rotates. In this embodiment, the rod-shaped member 38c rotates clockwise. As shown in FIG. 7(c), when the upper frame 14 is further lowered by the operator, the rod-shaped member 38c lowers while abutting against the cross shaft 12c.

[0042] As described above, according to the present disclosure, it is possible to provide a moving body 1 capable of storing compressed air while moving.

[0043] <Other embodiments> Although the embodiment of the present disclosure has been described above, the present disclosure is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention. In particular, the multiple modifications described in this specification can be arbitrarily combined as necessary.

[0044] (a) In the above embodiment, the actuator 6 is used to raise and lower the lift mechanism 12, but the present disclosure is not limited to this. The actuator 6 may be used in a device other than the lift mechanism 12, such as a device for pushing out a transported object.

[0045] (b) In the above embodiment, a chain is used to transmit power from the first sprocket 26d to the second sprocket 8d, but the present disclosure is not limited to this. For example, a belt or gears may be used to transmit power from the first sprocket 26d to the second sprocket 8d.

[0046] (c) In the above embodiment, the pumps 16 are provided on both the left and right sides of the width direction (left-right direction) with respect to the movement direction F of the movable body 1, but the present disclosure is not limited to this. For example, the pumps 16 may be provided on only one of the left and right sides.

[0047] (d) In the above embodiment, the moving body 1 is described as a hand-pushed moving body pushed by an operator, but the present disclosure is not limited to this. The moving body 1 may be, for example, an automatic conveying device that automatically conveys an object to be conveyed, equipped with the pressure accumulation system 4. [Explanation of symbols]

[0048] 1: Moving object 2: Cart 4: Pressure storage system 6: Actuator 8c: Axis 8d: 2nd sprocket 10: Support shaft 12: Lift mechanism 14: Upper frame 16: Pump 16a: Piston 16b: Shaft 16c: Cylinder 16d: 1st room 16e: 2nd room 18: Tank 20: First check valve 26c: Axis 36: First locking mechanism 38: Second locking mechanism

Claims

1. A cart having wheels; a pump that is driven by the wheels and compresses air, the pump having a piston, a shaft to which the piston is fixed, and a cylinder that houses the piston; a tank for storing the air compressed by the pump; an actuator operated by air supplied from the tank; A rotating body driven by the wheel; A support shaft that supports the cylinder on the cart; Equipped with The shaft is connected to the rotor, The cylinder swings about the support shaft. Mobile body.

2. The cylinder has a first chamber on a side to which the shaft of the piston is fixed, and a second chamber on an opposite side to the first chamber with the piston interposed therebetween, and both the first chamber and the second chamber are compression chambers. The moving body according to claim 1 .

3. a first check valve for preventing air from flowing from the cylinder; a second check valve for preventing air from flowing into the cylinder; Further comprising:

3. A moving body according to claim 1 or 2.

4. The cylinder has a first chamber on a side to which the shaft of the piston is fixed, and a second chamber on the opposite side of the first chamber and the piston, The first check valve and the second check valve are connected to the first chamber and the second chamber, respectively. The moving body according to claim 3.

5. Further comprising a lift mechanism; The actuator operates the lift mechanism. A moving body according to any one of claims 1 to 4.

6. The lift mechanism includes a shaft member and a first lock mechanism. the first locking mechanism engages with the shaft member when the lift mechanism is raised; The moving body according to claim 5.

7. An upper frame is further provided at an upper end of the lift mechanism, the upper frame has a first end rotatably connected to the lift mechanism, and a second end of the upper frame opposite to the first end moves in a direction away from the lift mechanism to tilt the upper frame, and has a second lock mechanism that prevents the upper frame from approaching the lift mechanism in a state in which the upper frame is tilted in the direction away from the lift mechanism; 7. A moving body according to claim 5 or 6.

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