JPH0445967Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pit trolley on which heavy objects are placed and moved within a pit.

[Summary of the idea]

In this invention, arms extending upward are provided on both sides of a pit cart that moves in a pit, and wheels provided on these arms roll on the upper edges of both sides of the pit, and wheels that protrude from both sides of the pit are provided. This invention relates to a pit trolley which is provided with guide rollers so as to move the pit so that the guide rollers roll on the side walls on both sides of the pit, thereby efficiently moving heavy objects within the pit. .

[Conventional technology]

When removing or attaching a heavy object installed on a large truck or large bus, such as a transmission weighing 200 to 300 kg, to the vehicle, a worker must climb under the vehicle. Not only is it very dangerous to perform the work, but the workability is also very poor, and therefore the efficiency of the work is also reduced. Therefore, a pit was used to remove and install the transmission.

When using a pit, the bus 1 is guided onto the pit 4 as shown in FIG. 5, and the trolley 5 is placed below the transmission 3 connected to the engine 2 of the bus 1. was. Then, the transmission 3 was separated from the engine 2, and the transmission 3 was lowered onto the truck 5 in the pit 4 using a special hanging device. After this, the transmission 3 is moved together with the trolley 5 inside the pit 4, and the bus 1
I was trying to pull it out from underneath. Thereafter, the transmission 3 is lifted from inside the pit 4 by a fork lift or a hoist crane via a wire and pulled out onto the pit 4 for repair or other work.

[Problem that the invention attempts to solve]

This conventional method for removing or installing the transmission 3 has the disadvantage that the operator has to enter and exit the pit 4 more frequently. Furthermore, the transmission 3 has a long movement distance in the height direction, which has the disadvantage of reducing work efficiency. Furthermore, when this transmission 3 is attached to the bus 1, the operation described above is reversed, but the same problem occurs in this case as well.

The present invention was devised in view of the above-mentioned problems, and an object of the present invention is to provide a pit cart that can efficiently carry heavy objects and move them within the pit. It is something.

[Means for solving problems]

The present invention is a pit trolley that carries heavy objects and moves within a pit, and is equipped with arms extending upward on both sides, and wheels provided on the arms roll on the upper edges of both sides of the pit. Moreover, guide rollers are provided so as to protrude from both sides of the truck, so that the guide rollers roll on the side walls on both sides of the pit, and furthermore, a receiving part consisting of a notch having a shape corresponding to the supporting part of the heavy object is provided. Adapters provided on supporting plates facing each other are removably placed on the cart, the receiving portion receives the heavy object, and the heavy object is placed on the cart via the adapter. Moreover, an engaging part that engages with a lifting means is provided on the upper end side of the support plate of the adapter and on both sides of the notch, and the heavy object is held in a state using the engaging part. The present invention relates to a pit trolley, characterized in that the adapter is lifted up by the lifting means.

[Effect]

For example, a heavy object such as a transmission that has been removed from the lower part of an automobile is placed on the truck while being received by the receiving portion of the adapter on the truck. The cart carrying a heavy object moves within the pit by wheels provided at the ends of the arms rolling on the upper edges on both sides of the pit 4. At this time, the guide rollers on both sides begin to roll on the side walls of the pit, thereby stably guiding the truck within the pit. In addition, when removing a heavy object from the cart at a predetermined position, the lifting means is engaged with the engaging portion, and the heavy object is lifted from the cart while being received by the adapter and moved to the predetermined position. It becomes like this.

〔Example〕

The present invention will be explained below with reference to an illustrated embodiment.
The trolley 11 shown in FIGS. 1 to 3 is a trolley used to receive the transmission of a large bus or a large truck and move it within the pit 10.
It is equipped with 2. Arms 13 are fixed to the front and rear portions of both sides of the base 12, respectively, so as to extend upward. A wheel 14 is rotatably supported at the upper end and outer side of this arm 13. Further, a guide roller 15 is provided on the base 12 so as to protrude laterally. Furthermore, there are handles 1 on the front and rear of the base 12, respectively.
6 is installed.

Furthermore, an adapter 17 is placed on this trolley 11. Support plates 18 are provided upright at the front and rear ends of the adapter 17, respectively.
are arranged in series, and a notch 19 is provided in each of the front and rear support plates 18. These notches 19 are adapted to receive the front and rear ends of the transmission 20, respectively.
Further, wire insertion holes 21 are formed on both sides of the upper end of the support plate 18, respectively.

Next, when using the cart 11 configured as described above, the wheels 14 attached to the upper end of the arm 13 of this cart 11 are mounted on both sides of the pit 10 as shown in FIGS. 2 and 3. Place it so that it touches the top edge. At this time, since the guide rollers 15 protrude to both sides of the truck 11, the pit 1
It comes into contact with the side walls on both sides of 0. In this way, the trolley 11 is placed below the transmission 20 of the bus 23. In this state, the transmission 20 is separated from the engine 24, suspended using a special hanging device, and gently lowered as shown by the arrow 31 in FIGS. This transmission 20 is placed on top of the .

The transmission 20, which has been separated from the engine 24 of the bus 23 and placed on the trolley 11 via the adapter 17, is moved within the pit 10 as indicated by the arrow 32 in FIG. At this time, the trolley 11 is
Gently pull in the direction of arrow 32. Then wheel 14
are rolled on the upper edges 22 on both sides of the pit 10, and the guide rollers 15 are guided while rolling on the side walls of the pit 10.
is smoothly moved in the length direction of the pit 10. In this way, the transmission 20 is pulled out from under the bus 23, as shown in FIG. After this, connect wire 25 to adapter 1.
The wire is inserted into the wire insertion hole 21 of the support plate 18 of No. 7, and the arrow 33 is inserted by the hoist crane 26.
It is lifted up as shown in Figure 4, then moved laterally and placed in the working position as shown by the chain line in Figure 4. In this state, a predetermined work will be performed.

According to such a truck 11, since the truck 11 is supported at an intermediate position in the height direction within the pit 10, the vertical movement distance of the transmission 20 removed from the bus 23 is short. The work becomes easier. Also, inside pit 10, trolley 1
1, the trolley 11 does not move at the bottom of the pit 10, but moves while suspended at an intermediate height. The work becomes much easier and the worker does not injure his or her lower back. The handle 16 also provides the advantage of making it easier to move the trolley 11. Also especially trolley 1
Since the transmission 20 can be lifted together with the adapter 17 when the transmission 20 is taken out from the adapter 1, the work of lifting the transmission 20 becomes safe and easy. After completing the repair, Transmission 20 was transferred to Bus 2.
3, the operation is reverse to the above-mentioned removal operation, but the same working effect can be obtained in this case as well.

Although the present invention has been described above with reference to the illustrated single heavy object,
The present invention is not limited to the above embodiments, and various modifications can be made based on the technical idea of the present invention. For example, in the above embodiment, the large bus 23
The invention relates to a pit trolley 11 for a transmission 20, but the present invention is applicable to pit trolleys that can be used to move various other heavy objects.

[Effect of idea]

As described above, according to the present invention, arms are provided on both sides that extend upward, and the wheels provided on these arms roll on the upper edges of both sides of the pit, and furthermore, the wheels protrude from both sides of the cart. A guide roller is provided which rolls on both side walls of the pit. Therefore, according to the present invention, it is possible to obtain a cart that can move within a pit at an intermediate height with a heavy object placed thereon, and at this time, the guide rollers are moved on both sides. It rolls on the side wall of the pit and moves correctly along the pit. Therefore, it becomes possible to easily and reliably move a cart on which a heavy object is placed within the pit, and work efficiency can be improved. Furthermore, since this truck is located at a higher position than the bottom of the pit, it becomes easy to place heavy objects on or take out heavy objects from this truck.

Further, according to the present invention, an adapter in which a receiving part consisting of a notch of a shape corresponding to a supporting part of a heavy object is provided on supporting plates facing each other is removably placed on a trolley, and It is designed to receive objects, and heavy objects can be placed on the trolley via this adapter. Therefore, the heavy object is stably supported by the support section formed by the notch provided in the support plate of the adapter, and is placed on the trolley via this adapter. This will definitely prevent it from wobbling or falling over. In addition, since the adapter is detachable from the trolley, by preparing various adapters depending on the shape and size of the heavy object, we can provide pit trolleys that can be applied to a wide range of heavy objects. It becomes possible to do so.

In addition, engaging parts for engaging the lifting means are provided on the upper end side of the support plate of the adapter on both sides of the notch, and the engaging parts are used to lift the adapter with the lifting means while the heavy object is being held. I try to hang it up. Therefore, when unloading a heavy object from a trolley, the heavy object is moved from the cart to a predetermined position by the lifting means using the engagement part of the adapter while the heavy object is still supported by the adapter. will be done. Therefore, it becomes very easy to unload heavy objects from the truck. Moreover, since the engaging portions that engage with the lifting means are provided on the upper end side of the support plate of the adapter and on both sides of the notch, the engaging portions that engage with the lifting means are placed above the center of gravity of the adapter on which the heavy object is placed. As a result, the heavy objects can be lifted up in a stable state using the lifting means, and the safety of the work can be ensured.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing a pit cart according to an embodiment of the present invention, Fig. 2 is a side view of essential parts showing the operation of placing a transmission on the cart, and Fig. 3 is a front view of the same. , FIG. 4 is a side view of the main part showing the operation of removing the transmission from the cart moved in the pit, and FIG. 5 is a side view of the main part showing the operation of removing the conventional transmission. In addition, in the symbols used in the drawings, 10... pit, 11... pitt truck, 13... arm, 1
4...Wheel, 15...Guide roller, 16...Handle, 17...Adapter, 18...Support plate, 19...
...Cut, 20...Transmission, 21...
... wire insertion hole, 22 ... upper edge, 25 ... wire, 26 ... hoist crane.

Claims (1)

[Scope of Claim for Utility Model Registration] A pit trolley on which heavy objects are placed and moved within a pit, which is provided with arms extending upward on both sides, and wheels provided on the arms roll along the upper edges of both sides of the pit. Further, guide rollers are provided so as to protrude from both sides of the truck, and the guide rollers are configured to roll on the side walls on both sides of the pit. An adapter with receiving parts provided on support plates facing each other is removably placed on the trolley, so that the heavy object is received by the receiving part, and the heavy object is transferred to the trolley via the adapter. The heavy object is placed on top of the adapter and is provided with engaging portions that engage with the lifting means on the upper end side of the support plate of the adapter and on both sides of the notch, and the heavy object is held using the engaging portions. A pit trolley, characterized in that the adapter is lifted up by the lifting means in its original state.