JPH0216934Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a trolley for vertical heavy objects, etc., which is used when transporting vertical heavy objects, etc. to a desired installation location.

``Prior Art'' Conventionally, as shown in FIG. 5, this type of bogie 1 includes a frame structure bogie body 2, a pair of main wheels 3 provided on the lower front side of the bogie body 2, and the bogie body 2. A pair of auxiliary wheels 4 provided at the lower end of 2
When using this trolley 1,
A vertical heavy object or the like is placed on the upper surface of the trolley 1 and carried by holding the hand-held portion 5 of the trolley 1 while maintaining the balance of the center of gravity. For this reason, when there is a step such as a curb on the road surface, a large pushing or pulling force is required to pull the cart 1 onto the step. When the main wheels 3 came into contact with the stepped portion when the main wheels 3 came into contact with the stepped portion, the force applied in the straight direction caused the center of gravity to shift toward the handheld portion, and there was a risk that the device could not be fully supported and would fall or be caught. Furthermore, even when the device must be installed through a low opening, the device is transported in an inclined state so that the center of gravity is on the side of the hand-held portion 5. For this reason, similar to the above, there were disadvantages in that a large amount of force was required and the work was dangerous.

``Purpose of the present invention'' In view of the above-mentioned drawbacks of the conventional technology, the present invention has been developed to make it easier to pull up the trolley over the step when there is a step such as a curb on the road surface during transportation, or when passing through a low frontage. Another object of the present invention is to obtain a cart for vertical heavy objects that can be used at a small angle of inclination, so to speak, in a low position.

"Means for Achieving the Object of the Present Invention" The present invention consists of a trolley body on which vertical heavy objects can be placed, and an arm attached to the lower front of the trolley body so that the position can be changed back and forth or up and down. and a sub-wheel that is repositionably provided on the truck body behind the main wheel via a flexible link mechanism, and the arm has a required distance from the side plate of the truck body. The swivel link mechanism is provided with a positioning plate that engages with a protruding engagement pin and fixes the arm, and the swivel link mechanism includes a first arm and a positioning plate that is guided by a guide rail formed on the side plate and that is used for locking the side plate. A second arm having an engagement protrusion that engages with the hole is provided.

"Embodiments of the present invention" The present invention will be described in detail below with reference to embodiments shown in the drawings.

In the embodiment shown in FIGS. 1 to 4, reference numeral 11 is a cart capable of transporting vertical heavy objects. Reference numeral 12 denotes a trolley body having a frame structure made by bending and welding pipes, etc. This trolley body 12 has a receiving plate 13 fixed to the lower part thereof for receiving vertical heavy objects, etc.
A handheld portion 14 is formed at the top. Furthermore, a side plate 15 is welded to the side of the truck body 12. Reference numeral 16 denotes a pair of main wheels attached via arms 17 rotatably supported near the lower front of the truck body 12. The arm 17 is provided with a positioning device 18 so that when the arm 17 is rotated and moved back and forth or up and down, it can be fixed at the front and rear, upper and lower positions, respectively. This positioning device 18 includes a pair of arm fixing positioning plates 21 and 21 which are pivotally supported approximately at the center of the arm 17 and in which engaging grooves 19 and 20 are formed, and which are provided on the pair of positioning plates 21 and 21. the operating piece 22 and the movement shaft 23 fixed to this operating piece 22.
and engagement pins 20, 24, 25 formed protruding from the side plate 15 of the truck main body 12 at required intervals to engage with the engagement grooves 19, 20, respectively, and one of which is attached to the positioning plate 21. and a spring 27 attached to a shaft 26 which pivotally supports the arm 17 on the truck body 12.
Reference numeral 28 denotes a pair of auxiliary wheels provided at the lower end of the truck body 12, and the auxiliary wheels 28 are attached so that the truck body 12 can move independently in conjunction with the main wheels 16 in an inclined state. It is being Reference numeral 29 denotes a sub-wheel mechanism provided behind the main wheels 16, near the top of the main wheels in FIG.
A swivel link mechanism 30 with one side fulcrum attached to 2
and a pair of sub-wheels 31 with casters provided on the swivel link mechanism 30. The swivel link mechanism 30 is connected to the sub wheel 3.
A base plate 32 to which protruding plates 32a, 32a are fixed, each having a gap at a predetermined interval formed on the upper surface to which 1 is attached.
and one side is the protruding plates 32a, 3 of this base plate 32.
2a, and the other arm 3 is pivotally supported at a position near the rear of the side plate 15 of the truck body 12.
3, a guide rail 34 on which the first arm 33 is pivotally supported and a notch formed in the vertical direction in front of the side plate 15; The second arm 35 is pivotally supported between the protruding plates 32a, 32a of the base plate 32. In addition,
The second arm 35 has a locking hole that engages with a plurality of locking holes 36, 37, and 38 formed at required intervals in the side plate 15 so that the subwheel 31 can be fixed at a predetermined position. Joint protrusion 39
is provided.

The trolley 11 with the above configuration is used when transporting vertical heavy objects etc. to the installation location.
In use, the main wheel 16 is fixed to the upper side, and the sub wheel 31 is moved to the storage position by the second arm 3.
5 is fixed in the locking hole 38, a vertical heavy object 40 or the like is placed on the receiving plate 13 along the rear surface of the truck body 12.
The main wheels 16 are placed on the ground while maintaining the balance of the center of gravity, and the hand-held portion 1 of the main body 12 is
4 for transportation. In this case, as shown in FIG. 3, the sub-wheels 31 may also be grounded, and the center of gravity of the vertical heavy object may be positioned between the main wheels 16 and the sub-wheels 31 for transportation. If a step such as a curb is formed on the road surface, the main wheel 1
6 and the auxiliary wheel 28 are brought into contact with the ground, and the hand-held portion 14 is lifted up so that both the wheels 16 and 28 are brought into contact with the ground. The sub-wheel 31 was then stored.
The engaging protrusion 39 of the second arm 35 is fixed at the position of the locking hole 36, and the sub-wheel 31 is pulled over the step. Thereafter, using the sub-wheel 31 on the stepped portion as a fulcrum, the main wheel 16 is raised above the stepped portion by driving while applying a load to the front side of the hand-held portion 14. At this time, it is advisable to push up heavy areas from the bottom side of the cart 11 as well.

In addition, when carrying the vehicle normally, as described above, if the main wheels 16 and the sub-wheels 31 are kept on the ground, the vehicle can easily travel with no load on the handheld portion 14. Also, since it can run at a small angle of inclination, it can remain unchanged even when passing through low frontages. Next, when using the trolley 11 in a substantially horizontal state as shown in FIG. 35 is fixed in the locking hole 37. Next, a plate 41 or the like is placed on the upper surface of the trolley 11, and then the plate 41
It can be used as a trolley for transporting luggage by placing small luggage 42 on it.

"Effects of the Present Invention" As is clear from the above explanation, the present invention has the following effects.

(1) If there is a step such as a curb on the road surface, it is possible to get over the step using both the main wheels and the sub wheels. Therefore, it can be transported easily and safely without requiring a large amount of force unlike the conventional method.

(2) Since the main wheels and sub-wheels are movable, by fixing the main wheels downward and the sub-wheels upward, the cart can be kept horizontal and used as a four-wheeled cart. can.

(3) Therefore, there is no need to worry about it falling over during transportation.
Moreover, even when passing through a narrow frontage, it can be passed through as is.

(4) In addition, if the main wheels are returned to the lower front position of the bogie body, and the sub wheels are moved below the side plates of the bogie body so as to approach the main wheels, the center of gravity for the wheels of vertical heavy objects can be The position changes to the desired position, and the step can be easily climbed over.

(5) The position of the sub-wheel can be changed by a universal link mechanism having a first arm and a second arm.
For example, compared to a transport vehicle that has a drive mechanism for changing the position of sub-wheels using hydraulic cylinders, hydraulic pumps, motors, etc. (Japanese Patent Application Laid-open No. 51-23925), the transport vehicle can be manufactured at a low cost, and There is almost no need to worry about work being interrupted due to medium-sized breakdowns.

(6) Since the swivel link mechanism is equipped with a second arm that is guided by a guide rail formed on the side plate of the bogie body and has an engaging protrusion that engages with a locking hole in the side plate, it is possible to Can be securely fixed in position.

[Brief explanation of the drawing]

Figure 1 is a front view of an embodiment of the present invention in use, Figure 2 is a plan view of Figure 1, Figure 3 is a sectional view taken along line A-A in Figure 2, and Figure 4 is a horizontal view. FIG. 5 is an explanatory diagram showing one embodiment of a conventional trolley. 11... Cart, 12... Cart body, 13... Receiving plate, 14... Handheld portion, 15... Side plate, 16...
Main wheel, 17... Arm, 18... Positioning device, 19, 20... Engagement groove, 21... Positioning plate, 22... Operating piece, 23... Interlocking shaft, 24, 2
5... Engagement pin, 26... Shaft, 28... Auxiliary wheel, 29... Sub wheel mechanism, 30... Universal link mechanism, 40... Vertical heavy object.

Claims (1)

[Scope of utility model registration request] A trolley body that can carry vertical heavy objects,
A main wheel is attached to the lower front of the bogie body via an arm so that its position can be changed back and forth or up and down, and a main wheel is attached to the bogie body behind the main wheel so that its position can be changed via a flexible link mechanism. The arm is provided with a positioning plate that engages with an engagement pin protruding from the side plate of the truck main body at a required interval and fixes the arm, and the arm is provided with a positioning plate that fixes the arm. A vertical heavy object, etc., characterized in that the device is equipped with a first arm and a second arm that is guided by a guide rail formed on a side plate and has an engaging protrusion that engages with a locking hole in the side plate. trolley.