JPH07257388A - On-stepped-surface travelable dolly - Google Patents

Abstract

PURPOSE:To provide an on-stepped-surface travelable dolly which can smoothly and surely carry carried objects with little force regardless of its load even on a stepped road surface. CONSTITUTION:A load receiving part 2 is horizontally protruded from the lower part of a housing part 1, a wheel 15 of driving part and a hydraulic cylinder 14 are provided under the handle 18 of an operation part 22, a driving belt 20 is laid over the wheel 15 so as to be inclined to the advancing direction by a guide plate 19 19 provided on the wheel 14 to connect the housing part 11 to the hydraulic cylinder 14. Further, the driving part is pin-connected to the load receiving part 2 by a plate 11, one end of a connecting bar 13 is pin- connected to the plate 11, and the other end of the connecting bar 13 is pin- connected to one end of a rotating piece 12 pivotally fixed to the top end of the load receiving part 2. The other end of the rotating piece 12 is pin-connected to the other end of a traveling part 4 one end on advancing side of which is pivotally fixed to the load receiving part 2 to continuously connect the plate 11, the connecting bar 13, the rotating piece 12 and the traveling part 4, and a control part 26 for controlling the hydraulic cylinder 14 and a motor and a battery 25 are provided.

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Application] The present invention can be applied to the transportation of materials (hereinafter referred to as transportation goods) such as members, materials, products, appliances, equipment, timber, heavy luggage, and large luggage in factories, warehouses, roads, etc. The present invention relates to a carriage capable of traveling on a step surface which is carried on a road surface having a step.

[0002]

2. Description of the Related Art In a conventional transport vehicle, a pair of load receiving portions, which are vertically movable, are protruded from an operating portion for steering the vehicle in a traveling direction, and wheels are provided on a lower wall of a front side of the pair of load receiving portions. Is provided, and the wheels and the wheels below the operation section support the load of the article to be loaded placed on the upper surface of the pair of load receiving sections, and carry the articles to a predetermined position. However, on a stepped road surface, the wheels subjected to the load and the own weight of the carrier collided with the step,
It was difficult to get over this step and proceed. Furthermore,
When the load is heavy, it was very difficult for people to lift the wheels and climb over the steps.

[0003]

The problem to be solved by the present invention is to solve these problems of the prior art, and to smoothly and reliably apply even a road surface having a step with a small force regardless of the load of the transported object. It is to provide a carriage that can be transported on a step surface.

[0004]

Means for Solving the Problems The structure of the present invention which has solved the above problems is as follows. A traveling section in which a belt is wound around the outer circumference of a free roller group in which a plurality of free rollers are arranged in parallel is tiltably provided at the tip of the load receiving section to steer the progress, raise and lower the load receiving section, and A free-traveling carriage for level-difference traveling, which is provided with an operating portion for performing tilting. 2) A free-moving transportation vehicle for level-difference traveling as described in 1), wherein interlocking means for interlocking the tilting of the running portion with the elevation of the load receiving portion is provided. 3) The drive unit and the load receiving unit are pin-coupled with a plate, one end of the connecting rod is pin-coupled to the plate, and the other end of the connecting rod is pin-connecting with one end of a rotating piece pivotally attached to the tip of the load receiving unit. The other end of the rotating piece is pivoted to the cargo receiving part at one end on the traveling side. Running portion and the other end is a pin coupled to the 2) step surface running freely truck according configuring the interlock means by concatenating the the traveling plate and the connecting rod and the rotating piece to the you.

[0005]

According to the present invention, when the operator operates the operation portion to lower the horizontally projecting load receiving portion toward the road surface, the traveling portion that supports the load receiving portion by contacting the road surface in an inclined state serves as the load receiving portion. Since the load receiving portion is rotated so as to be parallel to each other, the traveling portion does not hinder the descent of the load receiving portion, and the load receiving portion is lowered in the road surface direction.

[0006] The load receiving portion is inserted into a space of a pallet in which a space is formed in advance on which a load is placed, and an operator operates the operating portion to raise the load receiving portion and load the load with the load. Place it on the upper surface of the part. In this case, the traveling unit tilts the free roller on the side opposite to the traveling direction from the parallel state to the vertical direction so as to always contact the road surface so as to contact the road surface. As a result, the load of the load is supported by the inclined traveling section and the drive section below the operating section in which the drive belt is stretched so as to incline with respect to the traveling direction, and the load is placed on the upper surface of the load receiving section. It will be placed. or,
In the case of a conveyed product that creates a space below, the cargo receiving portion may be directly inserted into the space and the cargo receiving portion may be lifted in the same manner as described above to place the conveyed product on the upper surface of the cargo receiving portion. Furthermore, the transported object may be placed on the load receiving portion by the hand of the operator. In this way, when traveling on a stepped surface with a load placed on the cargo receiving section, if the belt of the traveling section in which the free roller on the traveling direction side is inclined contacts the step and continues to proceed as it is. , While the belt is in contact with the step, the free roller group moves inside the belt as it goes over the step without changing the contact part with the step, so the running part causes friction with the step. You can get over smoothly without any trouble, and the cargo receiving part can proceed smoothly with little force regardless of the step. Further, since the drive belt is stretched so that the wheels of the drive unit below the rear operation unit are inclined with respect to the traveling direction, the drive belt contacts the step as in the traveling unit, so The wheels rotate inside the drive belt without changing the contact area to move over the step, so even if the transport path is a step surface, it can be driven with a small force regardless of the load of the transported object. The parts and the wheels can be smoothly passed over to convey the transported object to a predetermined position. In the same manner as described above, the transported goods may be lowered by lowering the cargo receiving portion to bring the pallet or the cargo into contact with the road surface to pull out the cargo receiving portion from the space, or the operator may manually lower the cargo.

In the case where the interlocking means for interlocking the tilting of the traveling portion with the lifting and lowering of the load receiving portion is provided, it is not necessary to tilt the traveling portion separately from the lifting and lowering of the cargo receiving portion, and the operator's operation becomes simple.

The driving part and the load receiving part are pin-coupled with a plate, one end of the connecting rod is pin-connected with the plate, and the other end of the connecting rod is pin-connecting with one end of a rotating piece pivotally attached to the tip of the load receiving part. , Interlocking means for connecting the other end of the rotating piece to the other end of the traveling portion pivotally connected to the load receiving portion at one end on the advancing side, and connecting and interlocking the plate, the connecting rod, the rotating piece, and the traveling portion. In this case, if the operator operates the operation part to raise the load receiving part, the plate pin-connected to the load receiving part and the drive part pivots upward as the load receiving part rises around the mounting position of the drive part. Then, the rotation of this plate pushes the connecting rod in one direction of rotation,
The rotating piece rotatably provided on the load receiving portion is rotated from the parallel state to the vertical direction by the connecting rod, and the traveling portion pivotally attached at one end on the traveling side to the tip of the load receiving portion is rotated by the rotating piece. The free roller on the opposite side of the traveling direction is tilted while being kept in contact with the road surface to support the load receiving portion.

Even when a load is placed on the load receiving portion, the plate is rotated to the raised position of the load receiving portion and held at that position, so that the pushed connecting rod pushes the rotating piece strongly at the rotating position. Since the rotating piece holds the traveling section with the traveling section strongly tilted, the traveling section does not rotate to the original horizontal state under the load of the load, and the receiving section receives the cargo at the raised position. It will support the department.

When the load receiving portion is lowered, the plate rotates together with the load receiving portion to the original position, so that the pushing of the connecting rod by the plate is released and the rotation of the rotating piece by the connecting rod is also released. Is rotated in the original horizontal direction and the traveling portion is also rotated from the inclined state in the horizontal direction while being in contact with the road surface, so that the load receiving portion can be smoothly lowered. Further, the traveling section does not hinder the descent of the cargo receiving section.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of the present embodiment, FIG. 2 is a plan view of the present embodiment, FIG. 3 is an explanatory view showing a state where a load receiving portion of the present embodiment is raised, and FIG. 4 shows a transportation state of the present embodiment. FIG.

In the figure, 1 is a storage part for storing a battery 25 and a control part 26, 2 is a pair of hollow load receiving parts integrally connected to the side surface of the storage part 1 to form a load receiving part, and 3 is a long hole 33, An outer frame 4 provided at the tip of the load receiving portion 2 is a running portion 4 rotatably provided in a long hole 33 on the inner side surface of the outer frame 3 facing the load receiving portion 2, and a running portion 5 is formed. A free roller, 6 is a connecting piece for independently rotatably connecting the free rollers 5 arranged in parallel, 7 is a free roller group in which the free rollers 5 are connected in parallel by the connecting piece 6, and 8 is the same free roller group. 7 A rubber belt wound around the outer periphery, 9 is a cradle horizontally projected from the center of the upper side of the storage section 1 to the opposite side of the load receiving section 2, and 10 is a protrusion projected at both ends of the lower side of the storage section 1. And 11 are substantially triangular pre-rotatably provided at the tip of each protrusion 10. Numeral 12 denotes a rotating piece having one end rotatably provided at the end of the coupling piece 6 on the side of the load receiving portion 2 and the other end rotatably provided on the inner wall of the load receiving portion 2, and 13 denotes a lower corner of the plate 11. An elongated connecting rod whose one end is rotatably provided and the other end is rotatably provided on the convex portion of the rotating piece 12, 14 is a hydraulic cylinder in which a rod 27 is attached below the pedestal 9,
Reference numeral 5 is a wheel provided below the hydraulic cylinder 14, 16 is a tubular body for rotatably holding the hydraulic cylinder 14, 17 is attached to the tubular body 16 and both ends are bent downward, and the plate 11 is provided at this bent portion. Is a support frame having pins connected thereto, 18 is a handle vertically provided on the side surface of the hydraulic cylinder 14, and 19 is a triangular guide fixed to both ends of the central axis of the wheel 15 and protruding between the protrusions 10 and provided with rollers at three corners. A plate, 20 is an annular rubber drive belt whose surface is an uneven surface, which is wound around the three rollers of the wheel 15 and the guide plate 19, 21 is a lever that controls the elevation of the hydraulic cylinder 14 and the drum brake 23, and 22 is Motor 24 and control unit 2
6 is an operation unit, 23 is a drum brake, 24 is a motor for driving the wheels 15, 25 is a battery, 26
Is a control unit for controlling the hydraulic cylinder 14, 27 is a rod of the hydraulic cylinder 14, 28 is a transported object, 29 is a pallet, 30 is a pin connecting portion between the protrusion 10 and the plate 11,
31 is a pin coupling portion between the support frame 17 and the plate 11, 32
Is a pin connecting portion between the connecting rod 13 and the plate 11, and 33 is a long hole provided on the side surface at the tip of the outer frame.

In this embodiment, the free roller 5 on the traveling side of the traveling portion 4 is pivotally attached to the elongated hole 33 of the outer frame, and the other end is the load receiving portion 2
The pivoting piece 12 pivotally attached to the inner wall is pivotally attached, one end of the connecting rod 13 is rotatably provided on the convex portion of the pivoting piece 12, and the other end is connected to the support frame 17 and the projecting portion 10 of the accommodating portion 1. Is rotatably provided at the lower corner of the triangular plate 11 that is rotatably connected, so that if the operator operates the operation portion 22 to reduce the hydraulic cylinder 14, the pedestal 9 and The integrated storage unit 1 is lowered, and the protrusion 10 integrated with the storage unit 1 is attached to the support frame 17.
The plate 11 is rotated downward around the pin coupling portion 31 with the center. As a result, the connecting rod 13 pin-connected to the plate 11 horizontally moves toward the wheel 15 and the connecting piece 6
Is rotated so as to be parallel to the load receiving portion 2, and the connecting piece 6
Rotates the traveling unit 4 so as to be parallel to the load receiving unit 2, and the traveling unit 4 is housed in the outer frame 3. For this reason, when the pair of load receiving portions 2 is lowered until they come into contact with the road surface, the traveling portion 4 does not become an obstacle, and the pair of load receiving portions 2 can be lowered to such a degree that they come into contact with the road surface. Inserting the pair of load receiving parts 2 down to the point where they come into contact with the road surface into the space of the pallet 29 in which a space is formed below in which the transported object 28 is placed in advance, and the operator operates the operation part 22. When the control unit 26 extends the hydraulic cylinder 14, the projecting portion 10 that rises together with the pair of load receiving portions 2 and the storage portion 1 causes the plate 11 to rotate upward about the pin coupling portion 31 and the plate 11 Horizontally moves the connecting rod 13 connected to the plate 11 in the direction of the traveling portion 4, and rotates the connecting piece 6 in the vertical direction. As a result, the traveling unit 4 is guided by the connecting piece 6 and rotates in the vertical direction to be inclined with respect to the traveling direction.

Thus, the transported article 28 is placed on the upper surfaces of the pair of load receiving portions 2 without contacting the road surface, and the transported article 28 is moved to the traveling section 4.
And the wheels 15 so that the operator operates the operating portion 22 to drive the wheels 15 by the driving force of the motor 24, and the handle 1
8 is operated to horizontally rotate the hydraulic cylinder 14 in the cylindrical body 16 to change the direction of the wheel 15 and steer the vehicle in the traveling direction to transport it to a predetermined position. If there is a step in the course of transportation, the inclined traveling part 4 comes into contact with the belt 8 of the traveling part 4, and the free roller group 7 does not change the contact point with the step of the contacted belt 8 inside the belt 8. The free roller group 7 goes over the step without causing collision or friction with the step, and the belt 8 goes over the step along with the free roller group 7 that has passed the step. Further, since the drive belt 20 hung over the rear wheel 15 and the guide plate 19 is inclined with respect to the traveling direction, the inclined drive belt 20 comes into contact with the step like the traveling unit 4, The wheel 15 driven by the motor 24 rotates within the drive belt 20 without changing the contact point with the step of the contacted belt 8 so that the wheel 15 can pass over the step without causing collision or friction with the step. Go ahead,
The drive belt 20 goes over the step along with the wheel 15 that has passed over the step. Accordingly, when the transported article 28 transported to the predetermined position is unloaded, if the pair of load receiving portions 2 is lowered in the same manner as described above, the transported article 28 contacts the road surface and the pair of load receiving portions 2 The palette 29
By pulling out the article 28 from the space below, the article 28 is unloaded at a predetermined position.

In order to place the transported article 28 on the upper surface of the cargo receiving section 2, it is not limited to placing the transported article 28 on the pallet 29 in advance, and if there is a space below the transported article 28, the cargo receiving section 2 can be directly loaded.
May be inserted into the space to raise the load receiving portion 2.
Further, the article 28 may be placed on the upper surface of the load receiving portion 2 by the operator's hand. The wheels 15 are not limited to being driven by the driving force of the motor 24, and the wheels 15 may be in a free state and an operator may push them by hand.

[0016]

As described above, according to the present invention, a drive unit having a drive belt stretched around the outer periphery of the wheel so as to be inclined with respect to the traveling direction, and a plurality of free rollers tiltably provided at the tip of the load receiving unit are arranged in parallel. , Even if there is a step on the transportation path due to the inclination of the running part that winds the belt around the circumference of the integrally connected free rollers, the free roller on the traveling direction side is in contact If you proceed, the free roller group will move around the step while rotating in the belt without changing the contact part of the belt with the step while the belt is in contact with the step, so the running part You can get over smoothly with little force without causing friction with steps. Furthermore,
Similarly to the traveling part, the wheels of the drive part are in a state where the drive belt is in contact with the step, and the wheel rotates inside the drive belt without changing the contact part of the drive belt with the step. Since it is possible to smoothly get over, it is possible to reliably carry to a predetermined position with a small force even on a road surface having a step, regardless of the weight of the carried object.

In the case where the interlocking means for interlocking the tilting of the traveling portion with the lifting and lowering of the load receiving portion is provided, it is not necessary to tilt the traveling portion separately from the lifting and lowering of the load receiving portion, and the operator's operation becomes simple.

The drive unit and the load receiving unit are pin-coupled by a plate, one end of the connecting rod is pin-coupled to the plate, and the other end of the connecting rod is pin-connecting to one end of a rotating piece pivotally attached to the tip of the load receiving unit. In the case where the other end of the rotating piece is pin-connected to the other end of the traveling portion pivotally connected to the load receiving portion at the traveling side, the plate, the connecting rod, the rotating piece, and the traveling portion are connected and interlocked. As the plate is rotated with the rise of the load receiving portion, the connecting rod strongly rotates the rotating piece, the rotating piece tilts the traveling portion, and the plate is held at the raised position of the load receiving portion. As a result, the connecting rod is held while being strongly pushed out, and the connecting rod is kept rotating the rotating piece, and the traveling portion is also strongly held in the inclined state. For this reason, even if the transported object is placed on the load receiving portion, the traveling portion is not rotated in the horizontal direction by the load of the transported object, and the load receiving portion is strongly supported.

[Brief description of drawings]

FIG. 1 is a front view of the present embodiment.

FIG. 2 is a plan view of the present embodiment.

FIG. 3 is an explanatory view showing a state where a load receiving portion of the present embodiment is raised.

FIG. 4 is an explanatory diagram showing a transportation state of the present embodiment.

[Explanation of symbols]

 1 Storage Section 2 Load-Receiving Section 3 Outer Frame 4 Traveling Section 5 Free Roller 6 Connecting Piece 7 Free Roller Group 8 Belt 9 Cradle 10 Projection 11 Plate 12 Rotating Piece 13 Connecting Rod 14 Hydraulic Cylinder 15 Wheel 16 Cylindrical 17 Support Frame 18 Handle 19 Guide Plate 20 Drive Belt 21 Lever 22 Operation Section 23 Drum Brake 24 Motor 25 Battery 26 Control Section 27 Rod 28 Cargo 29 Pallet 30 Pin Coupling Section 31 Pin Coupling Section 32 Coupling Section 33 Long Hole

Claims (3)

[Claims] 1. A free roller group in which a plurality of free rollers are arranged in parallel so that a load receiving section that can be raised and lowered extends horizontally from a drive section in which a drive belt is stretched around the outer circumference of a wheel so as to be inclined with respect to the traveling direction. A running surface having a belt wound around the outer periphery is provided at the tip of the load receiving portion so as to be tiltable, and an operation portion is provided for steering the progress, raising and lowering the load receiving portion, and tilting the running portion. Flexible carrier. 2. The step surface movable carriage according to claim 1, further comprising interlocking means for interlocking the tilting of the traveling part with the elevation of the load receiving part. 3. The drive unit and the load receiving unit are pin-coupled by a plate, one end of a connecting rod is pin-coupled to the plate, and the other end of the connecting rod is pinned to one end of a rotating piece pivotally attached to the tip of the load receiving unit. The other end of the rotating piece is pin-connected to the other end of the traveling portion whose one end on the advancing side is pivotally attached to the load receiving portion to connect the plate, the connecting rod, the rotating piece and the traveling portion to form an interlocking device. The stepless traveling vehicle according to claim 2, which is configured.