JPH10167077A - Dolly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate inclining work to change stand travelling over to caterpillar travelling by installing a small wheel on a tilting body free to fix in a parallel position and in a position projected diagonally downward. SOLUTION: A pair of left and right tilting bodies 40 is supported by a shaft 33 to support a movable frame 32 on a base end frame 30 on the inside of the movable frame 32. A small wheel 41 is supported on the head end side of each of the tilting bodies 40, and a lever 50 is axially supported on the both outsides of the movable frame 32. A plate piece 57 to lock with and release an lock plate 56 on a head end of the tilting body 40 is provided on a head end part lower surface of the movable frame 32. When the tilting body 40 is stored in the movable frame 32 and a receiving part 1 is roughly erected, it is supported by a freely rotating wheel 22 and the small wheel 41, and it is possible to move it in the optional direction by pushing and pulling it by a holding pipe 5. When the plate piece 57 is removed from the lock plate 56 and the lever 50 is pulled up, the tilting body 40 is projected diagonally downward, and the receiving part 1 automatically stands in a position inclined backward. It is easy to lay a caterpillar 10 from this position to be horizontal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truck mainly having a caterpillar suitable for carrying goods by going up and down stairs and a wheel for standing traveling which is suitable for turning in a narrow place. TECHNICAL FIELD The present invention relates to a transport vehicle capable of easily performing a tilting operation for switching from standing running to caterpillar running.

[0002]

2. Description of the Related Art The applicant of the present application has disclosed, as disclosed in Japanese Patent Application Laid-Open No. 63-134383, a carrier having a caterpillar suitable for transporting luggage mainly up and down stairs. On the back side of the load receiving portion where the support portion protrudes in a substantially right angle direction, a linear running portion of the caterpillar driven by the motor is provided substantially parallel to the load receiving portion, and at the lower end of the load receiving portion, the linear running portion of the caterpillar is In addition, the present invention invents a device which retreats to the load receiving portion side, supports an idler wheel projecting below the lower end of the caterpillar, and provides a small wheel on the bottom surface of the support portion.

[0003] When traveling by a caterpillar, the traveling route of this carrier is limited to a straight line. Therefore, when the vehicle changes direction, the vehicle travels upright and travels with idle wheels and small wheels. It is necessary to incline to run on a caterpillar.

[0004]

However, when the load is heavy, there is a problem that a large force is required to incline from the upright posture.

[0005] It should be noted that if the load receiving portion is inclined in advance, it can be easily tilted. However, in this case, there is a problem in that the load receiving portion cannot stand alone and is difficult to handle.

[0006]

Means for Solving the Problems, Actions and Effects As means for solving the above-mentioned problems, the invention of claim 1 has a small wheel supported at one end by a supporting portion and a posture parallel to the supporting portion. It is attached to a tilting body that can be fixed in a position that protrudes obliquely below the part, and when loading and tilting, it is easy to fix the tilting body in a position that protrudes obliquely downward because the center of gravity will be behind it and it is easy In the case of an empty load, the tilting body is fixed in a position parallel to the support portion, so that the tilting body can be self-sustained and has an effect of facilitating the handling. In the first aspect of the invention, the tilting body is pivotally supported near the load receiving portion of the support portion, and the small wheel is supported by a tilting link pivotally supported on the tip side of the tilting body, and the tilting link protrudes downward from the support portion. Shaft via connecting link to bracket A four-link mechanism is formed by the connection, and a stop link supported by a lever supported by a support portion is supported by a connection link, and a shaft fulcrum between the stop link and the connection link is defined by the lever. The lever is provided with a stopper that regulates the lever at a position slightly closer to the load receiving part than the extension of the straight line that connects the pivot point for the support part and the pivot point for the lever of the stop link. The tilting body can be reliably held in the posture obliquely projecting downward and can be released from the posture. According to the invention of claim 3, the tilting body in the invention of claim 1 or 2 is parallel to the support portion. Since the holding member that holds the posture and releases the holding is provided,
At the time of unloading, the tilting body can be made independent by being parallel to the support portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to tatami transportation will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a load receiving portion which is formed by connecting a pair of left and right frames 2 which are elongated in the vertical direction by a connecting plate 3 extending therebetween. The lower ends of a pair of gripping pipes 5 whose upper halves are bent forward are fitted to each other, and an endless belt having a large number of ridges 11 formed on the outer periphery is formed on the rear surface side of the load receiving portion 1. A pair of left and right caterpillars 10 are mounted by being wound around a driving wheel 14 supported at a lower end of a side plate 13 along a frame 2 and a driven wheel 12 supported at an upper end, respectively. The rear straight running portion 15 between the driving wheel 14 and the driven wheel 12 is maintained in a straight line parallel to the load receiving portion 1 by a plurality of rolling wheels 16 supported in parallel with the side plate 13. And this caterpillar 0 is not summer so is driven to rotate in both forward and reverse directions by a motor (not shown) that the battery (not shown) coupled to a drive wheel 14 of the lower power supply,
The driving operation is performed by the main operating unit 1 provided at the upper end of the receiving unit 1.
8 and a sub-operation unit 20 connected to the main operation unit 18 via a lead wire 19 passing through the holding pipe 5 and fixed to the upper end of the holding pipe 5.

At the lower end of the side plate 13, a pair of left and right idler wheels 22 projecting below the lower end of the caterpillar 10 and retracting to the load receiving unit 1 side from the rectilinear running part 15 on the rear side of the caterpillar 10 are provided. The shafts 23 are supported so that they can rotate freely.

A pair of left and right short base frames 30, 30 projecting forward from the lower ends of both frames 2 at right angles to each other and connected by a connecting plate 31, have a flat U-shaped movable frame. Both ends of the shaft 32 are swingably connected by a shaft 33, and a pin 34 is removably fitted in a portion where the frames 30 and 32 in front of the shaft 33 overlap, thereby fixing the movable frame 32 to the base frame 30. As a result, a support portion 35 projecting forward at right angles to the load receiving portion 1 is formed. The support portion 35 pulls out the pin 34 and lifts the movable frame 32 upward to be substantially parallel to the load receiving portion 1. It can be folded by taking a posture.

The upper surface 3 of the front end of the movable frame 32
2a, upper surface 31a of connecting plate 31 between base end frames 30
On the front surface 3a of the upper end of the connecting plate 3 at the upper end of the load receiving portion 1, a plurality of tilt preventing projections 36 spaced at a constant interval in the left-right direction are provided with the respective surfaces 32a, 31a and 3a.
a, one side edge b of the tatami mat a corresponds to the load receiving portion 1 and the lower edge c corresponds to the support portion 35. Tatami in between
The tatami a is held so as not to be tilted by fitting the edge of the tatami mat.

When the staircase is so narrow that it is not possible to turn the fold a straight, the inclination prevention protrusion 36 may be inclined in one direction when viewed from above, or may be inclined in the opposite direction. If the shape of the triangle is changed to the shape of a triangle, the number of tatami mats a that can be stacked decreases, but it is possible to turn with a small radius.

When transporting a refrigerator other than a tatami mat, for example, a refrigerator or the like, the tilt prevention projection 36 is unnecessary.

As shown in FIGS. 2, 3 and 4, a pair of tilting members 40, two on the left and right sides of the movable frame 32, support the movable frame 32 on the base frame 30. A small wheel 41 supported and swingable is supported by a tilting link 43 supported by a shaft 42 at the distal end side of each tilting body 40, and the tilting link 43 projects downward from the base end frame 30. A four-bar link mechanism 48 is configured by being connected to the bracket 44 by shafts 46 and 47 via a connection link 45,
A lever 50 is provided on both outer sides of the movable frame 32 by a shaft 49.
Is supported, and a stop link 52 supported by the lever 50 by a shaft 51 is supported by a connecting link 45 by a shaft 53. The stop link 52 and the connecting link 45 are supported by the connecting link 45.
Is slightly longer than the extension of the straight line A connecting the shaft 49 supporting the lever 50 to the movable frame 32 and the shaft 51 supporting the stop link 52 to the lever 50.
A stopper 54 is provided on the lever 50 for regulating the position to a position closer to the lever 50.

Each of the shafts 42, 46, 47, 49, 51,
53 is connected to the tilting body 40, the tilting link 43, the connecting link 45, the lever 50, and the stop link 57 on both the left and right sides, so that when one of the left and right levers 50 is operated, the other constituent member operates similarly. Has become.

An auxiliary wheel 55 is provided on the lower surface of the tip of each tilting body 40.
As shown in FIG. 3, when the tilting body 40 is placed in the movable frame 32, the tip of the tilting body 40 protrudes from the lower surface of the tip of one side of the movable frame 32. As shown in FIG. 5, the locking plate 56 is provided with a plate piece 57 that is locked by rotation in the direction of the arrow to hold the state, and released by rotation in the opposite direction.

When the tatami mat a is transported while moving on a flat place by the transport vehicle having such a structure, as shown in FIG. Caterpillar 1 with 15 in contact with the moving surface
0, the transporter can be made to run in a straight line by itself, and as shown in FIG.
0 is stored in the movable frame 32 so that the load receiving portion 1 is in a substantially upright posture, so that the transport vehicle is driven by the idler wheels 22 and the small wheels 4.
In this state, since the caterpillar 10 is floating from the moving surface, an operator (not shown) can move the transporter in any direction by grasping and pushing and pulling the gripping pipe 5. .

The auxiliary wheel 55 is effective when traveling over a groove in this state of travel.

When transporting the tatami a while moving up and down the stairs, the plate piece 57 is detached from the locking plate 56 of the tilting body 40 as shown by a chain line in FIG. 5, and then, as shown in FIG. 50
Causes the tilting body 40 to protrude obliquely downward around the axis 33, and as shown in FIG.
5 and the receiving unit 1 are relatively inclined backward by a fixed angle around the idler wheel 22, and the center of gravity is moved backward,
If the load is empty, it will fall down, but if the tatami mats a certain weight or more are piled up, the center of gravity will move forward and become independent.

As shown in FIG. 2, the shaft 53 supporting the stop link 52 and the connecting link 45 has a shaft 49 supporting the lever 50 on the movable frame 32 and a shaft 53 supporting the stop link 52 on the lever 50, as shown in FIG. A stopper 54 is provided on the lever 50 for regulating the position slightly closer to the load receiving portion 1 than the extension of the straight line A connecting the line 51 to the lever 51, and the stop link 52 is pressed against the stopper 54, thereby stabilizing the position.

Therefore, as shown in FIG. 6, the carrier can be easily turned down so that the caterpillars 10 are horizontal, and as shown in FIG. Can be used to go down the stairs, and as shown in FIG. 10, to ascend. Further, when turning around at the landing of the stairs, the posture shown in FIG. 8 is preferable.

When a carrier is not used, FIG.
As shown in FIG. 1, the movable frame 32 can be stored in a narrow place by pulling out the pin 34 of the support portion 35 and folding the movable frame 32 upward with the load receiving portion 1 standing.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a support portion in a state where a tilting body projects from a movable frame.

FIG. 3 is an enlarged sectional view of a support portion in a state where the tilting body is accommodated in a movable frame.

FIG. 4 is a perspective view of a support portion in a state where the tilting body is accommodated in a movable frame.

FIG. 5 is a partially enlarged perspective view of a support portion showing a state in which the tilting body is accommodated in the movable frame and fixed.

FIG. 6 is a side view of a caterpillar running on flat ground.

FIG. 7 is a side view of an upright state with idle wheels and small wheels.

FIG. 8 is a perspective view of a state in which the tilting body is protruded from the movable frame to tilt the load receiving unit and the support unit.

FIG. 9 is a side view of a state in which the user goes down the stairs.

FIG. 10 is a side view of a state in which the user climbs the stairs.

FIG. 11 is a side view of a state where the movable frame is folded.

[Explanation of symbols]

 1: Load receiving part 10: Caterpillar 15: Straight running part 22: Idler wheel 30: Base frame 31: Connecting plate 32: Movable frame 35: Supporting part 40: Tilting body 41: Small wheel 43: Tilting link 44: Bracket 45 : Connecting link 48: Four-link mechanism 50: Lever 52: Stop link 54: Stopper a: Tatami b: Side edge c: Lower edge

Claims (3)

[Claims] A straight running portion of a caterpillar driven by a motor is provided substantially in parallel with the load receiving portion on a back surface of a load receiving portion having a support portion projecting in a substantially right angle direction at a lower end, and provided at a lower end of the load receiving portion. A transport vehicle that retreats to the load receiving portion side of the caterpillar with respect to the rectilinear traveling portion, and that supports idler wheels protruding below the lower end of the caterpillar and has small wheels provided on the bottom surface of the support portion. , The small wheel is attached to a tilting body which is fixed at one end supported by the support portion and can be fixed to a posture parallel to the support portion and a posture obliquely protruding below the support portion. Haul truck. 2. The tilting body is pivotally supported by the support portion near the load receiving portion, and the small wheel is supported by a tilting link pivotally supported on a tip end side of the tilting body, and the tilting link is supported by the supporting portion. A four-bar link mechanism is formed by being connected to a bracket projecting downward from the bracket via a connection link, and a stop link supported by a lever supported by the support is connected to the connection link. And a pivot point between the stop link and the connection link is slightly closer to the load receiving part than an extension of a straight line connecting the pivot point of the lever with respect to the support portion and the pivot point of the stop link with respect to the lever. 2. The transport vehicle according to claim 1, wherein a stopper for regulating the position is provided on the lever. 3. The transport vehicle according to claim 1, wherein the tilting body is held in a posture parallel to the support portion, and a locking member for releasing the holding is provided.