JPH08119022A - Carrying truck - Google Patents

Abstract

PURPOSE: To provide a transporting carriage of versatility which can favorably transport an object to be transported even in a place where the use of upward space is limited, and can be suitably used regardless of the form of the object. CONSTITUTION: This transporting carriage is constituted so that a plurality of air bags 4 expanding/contracting by charge/discharge of pressure air are provided on the upper face part 1a of a carriage 1 instead of skids, and an object 5 to be transported on the carriage 1 is loaded and supported in the state forming and insuring a space 6 for transferring operation by the expanded air bags 4. Pressurized air is individually charged or discharged to the respective air bags 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carriage for placing and carrying a heavy object such as a segment used in a shield construction method.

[0002]

2. Description of the Related Art Generally, when carrying a heavy object to be carried by a carrier, the object to be carried is loaded onto the carrier by a transfer machine such as a forklift, a crane or a lifter at the beginning or the end of the carrier. Although it is loaded and unloaded, when loading and unloading a transported object by such a transfer machine, the lower surface of the transported object is a fork, wire rope, lifter claw, etc. (hereinafter collectively referred to as "transfer operation part"). ) Is supported by. Therefore, at the time of loading and unloading, a transfer work space, which is a necessary and sufficient space for inserting and removing the transfer action part, is formed and secured between the lower surface of the transported object and the upper surface of the trolley. Need to be kept.

Therefore, in the conventional carrier truck (hereinafter referred to as "conventional truck") 11, as shown in FIG.
1. A pair of front and rear skids 14, 14 made of prismatic wood or the like is provided on the upper surface portion 11a of the first skid.
It is usual to devise so that a sufficient transfer work space 6 is formed between the lower surface portion 5a of the transported object 5 and the upper surface portion 11a of the carriage 11 by means of 14.

In the conventional dolly 11,
At the transport start end, the transported object 5 is brought to the carriage 11 while being supported by the transfer operating parts 9, 9 (see FIG. 7A), and the transfer operating parts 9, 9 are lowered. After the transferred object 5 is placed and supported on the skids 14 and 14, the transfer action parts 9 and 9 are extracted from the transfer work space 6, so that the transferred object 5 is loaded onto the trolley 11. (See FIG. 2B). Then, the transported object 5 is placed on the skids 14 and 14 and is supported by the trolley 11.
Is carried to the transport end portion, and is unloaded from above the carriage 11 at the transport end portion. That is, after the transfer action parts 9 and 9 are inserted into the transfer work space 6 (see FIG. 6B), the transfer action parts 9 and 9 are lifted to move the transported object 5 from the skids 14 and 14. The object 5 to be transported is lifted up to a position where it is separated from it, and then the transferred object 5 is unloaded from the top of the trolley 1 (see FIG. 7A).

[0005]

However, the conventional bogie 11
According to the above, as described above, the transported object 5 is the skid 14,
Since the transfer work space 6 is transported while being supported and placed on the transfer unit 14, that is, the transfer work space 6 is required only when loading / unloading the transfer machine, Since it will be present even during transportation, the height to the upper surface of the transported object 5 during transportation (hereinafter referred to as “transport height”).
H ₀ becomes higher than necessary (see FIG. 8B). Furthermore, when the transferred object 5 is brought onto the dolly 11 by the transfer action parts 9 and 9 during loading, or when the transferred object 5 is lifted onto the dolly 11 by the transfer operation parts 9 and 9 during unloading, The transported object 5 is the skid 1
Since it is necessary to lift the skids 14 and 14 to a position that is separated by a considerable amount so as not to interfere with 4, 4, the height to the upper surface of the transported object 5 in such a case (hereinafter referred to as “transfer start height”). H ₁ is the transport height h ₀
As described above, it becomes extremely high (see FIG. 11A).

By the way, the height of the carriage 11 and the transfer work space 6 is limited even if the height is lowered. In particular, the height of the transfer work space 6 is set to be considerably high depending on the lifting stop accuracy of the transfer operation part 9 when the transfer operation part 9 moves up and down like a fork or a lifter claw. Need to be kept. That is, the height of the transfer work space 6 is essentially sufficient so that the transfer action section 9 can be inserted and removed, and theoretically, it should be slightly larger than the thickness of the transfer action section 9. However, in this case, it is easy to accurately stop the transfer operation unit 9 in a position corresponding to the transfer work space 6 unless the transfer operation unit 9 is moved up and down with high accuracy. No, the work efficiency is significantly reduced. Therefore, in general, the height of the transfer work space 6, that is, the height of the skid 14 is usually set to be considerably larger than the thickness of the transfer action portion 9.

Therefore, depending on the conventional truck 11, the transport height h ₀ and the transfer start height h ₁ become unnecessarily high. Therefore, in the tunnel leading to the shield excavation site or the equipment transport passage to the underground plant construction site, etc. As described above, in a place where the use of the upper space is limited, smooth conveyance of the transported object 5 is hindered, and the use place is actually limited.

Moreover, in the conventional cart 11, since the mounting posture of the object 5 to be transported on the vehicle 11 is specified by the shape of the skid 14, it is necessary to carry a plurality of types of objects 5 to be transported. In the case, depending on the shape of the transported object 5 (particularly, the shape of the lower surface portion), the transported object 5 cannot be placed in a stable posture, or the predetermined transfer work space 6 cannot be secured. It also has the disadvantage of poor versatility.

For example, as shown in FIG. 9, a step or
Transported object 5 having uneven portions 5b and 5c ₁For the recess
5b is supported by one skid 14 and the convex portion 5c is the other.
May be supported by one of the skids 14
If the skids 14 and 14 have the same height,
Thing 5₁The mounting posture of the machine is tilted and stable transportation cannot be performed.
And a transfer operation sufficient to insert and remove the transfer action parts 9, 9.
Business space 6 may not be formed (see Fig. (A))
See). Also, the transported object 5₁The lower surface of the corner of the skid 14
There is also a risk of contact with and damage. On the other hand, like this
In order to solve various problems, the skid 14 that supports the recess 5b
The higher the value, the less versatile it is
The height and transfer start height are extremely high (see Figure (B)).
See). Also, like the segment used for the shield construction method
In addition, the lower surface 5d has a convex shape such as an arc surface.
Shipment 5₂Also, the same problem as above occurs, and
As shown, the part located between the skids 14 and 14 is
Projects downward from the portion supported by the pads 14, 14.
Therefore, if the height of the skid 14 is low, the transfer action parts 9, 9
It is possible to form a transfer work space 6 sufficient to insert and remove
Not possible (see Fig. (A)), conversely, the height of the skid 14
The higher the height, the higher the conveyance height and transfer start height will be.
(See FIG. 2B).

The present invention has been made in view of the above-mentioned points, and the conveyance height and the transfer start height are set to the necessary minimum, so that the use of the upper space is restricted. It is an object of the present invention to provide a transporting carriage which is capable of favorably transporting a transported object and has general versatility that can be suitably used regardless of the shape of the transported object.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, a carrier truck according to the present invention has a plurality of airbags which are inflated and contracted by supplying and discharging pressurized air instead of skids on the upper surface of the truck. Is provided, and the object to be transported on the trolley is configured to be mounted and supported in a state where a predetermined transfer work space is formed and secured between the inflated airbag and the upper surface of the trolley. . In such a carrier, it is preferable that each of the airbags supply and discharge pressurized air separately.

[0012]

[Operation] When loading on the trolley at the beginning of transportation by a transfer machine such as a forklift, crane, lifter, etc., first, transfer each fork, wire rope, lifter claw, etc. in a state where each airbag is contracted. The action part brings the object to be transported onto the trolley, and each airbag is inflated by the supply of pressurized air so that the object to be transported is supported by the airbag, and the desired transfer is performed between the object to be transported and the trolley. Form and secure the work space.
Then, the transfer action part is pulled out from the transfer work space.

When the transfer action section is withdrawn from the transfer work space, air is discharged from each of the air bags to flatten the air bags and lower the object to be conveyed onto the carriage. , Complete loading.

When the loading is completed, the dolly on which the objects to be transported are placed is moved to the end of the transport, which is the destination, and the unloading is performed at the end of the transport. That is, the airbag is inflated to lift the transported object, a desired transfer work space is formed and secured under the transported object, and then the transfer action portion is inserted into the transfer work space. Then, while the transfer operation unit supports the transported object, the airbags are contracted, and the transported object is unloaded from the trolley.

When the lower surface of the object to be conveyed is not a flat shape, the loading, unloading, and transportation are carried out respectively.
This can be dealt with by adjusting the amount of inflation of each airbag according to the shape of the lower surface portion.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be specifically described below based on the embodiments shown in FIGS.

As shown in FIGS. 1 to 3, the carrier vehicle 1 of this embodiment is provided with a plurality of wheels 3 that run on a rail 2, and a battery for driving the wheels 3 is mounted. It is a known self-propelled carriage (battery car). Thus, according to the present invention, a pair of front and rear airbags 4 and 4 capable of expanding and contracting by supplying and discharging pressurized air are provided on the upper surface portion 1a of the carriage 1. Each of the airbags 4 is in the form of a hermetically sealed bag having sufficient strength to support the object 5 to be transferred in a state where a predetermined transfer work space 6 is formed and secured between the object 4 and the carriage 1. It is a known one made of a tough flexible sheet material made of chloroprene rubber, nylon or the like.

As shown in FIGS. 1 to 3, each airbag 4 has a recess 1 having a supply / discharge port 4a formed in the upper surface 1a of the carriage 1.
It is fixed to the upper surface 1a of the trolley in the state of being immersed in b, and by supplying pressurized air, it is expanded to lift the transported object 5 from the upper surface 1a of the trolley to a lifted state (see FIG. )), By discharging the pressurized air, the transported object 5 is contracted into a flat shape so as to be placed in a state of being substantially in contact with the trolley upper surface portion 1a (see FIG. 2B). ). Further, as shown in FIGS. 1 and 3, the supply / discharge port 4a of each airbag 4 is connected to a pressurized air supply device 8 such as a compressor mounted on the truck 1 via a supply / discharge pipe 7, Pressurized air is supplied to and discharged from the airbag 4 separately. That is, the supply / discharge switching valve and the flow rate control valve (not shown) provided in each supply / discharge pipe 7 are operated to control the supply / discharge switching of the pressurized air to each airbag 4 and the supply / discharge speed. In addition, by operating a pressure control valve (not shown) provided in each supply / discharge pipe 7, the pressure in each airbag 4, that is, the expansion amount of each airbag 4 can be arbitrarily controlled and maintained. ing. In addition,
As shown in FIG. 1 (A), the pressurized air supply device 8 is lower than the upper surface portion 1a of the carriage 1 so as not to hinder the transfer work of the transported object 5 on the upper surface portion 1a of the carriage 1. It is located in.

According to the carrier truck 1 configured as described above, the conventional truck 11 is expanded in place of the skid 14,
Since the retractable airbag 4 is used, loading, unloading, and transportation of the transported objects 5 can be performed satisfactorily and safely without causing the problems described at the beginning.

That is, as shown in FIG. 1, when loading an object to be conveyed 5 having a lower surface 5a having a planar shape onto a carriage 1 at the beginning of conveyance by a transfer machine such as a forklift, a crane or a lifter, first of all, While the airbags 4 and 4 are contracted, the object 5 to be conveyed is brought onto the carriage 1 by the transfer action portions 9 and 9 such as forks, wire ropes and lifter claws (see FIG. 1A).

At this time, since the airbags 4 and 4 are contracted, it is not necessary to lift the lower surface portion 5a of the transported object 5 to a higher position than the transfer work space 6 in order to avoid interference with the airbags 4 and 4. That is, it is sufficient to lift the transported object 5 to a height sufficient to secure the transfer work space 6 in which the transfer action parts 9 and 9 can be inserted and removed. Therefore, the transfer start height H ₁ when the transferred object 5 is brought onto the trolley 1 by the transfer action parts 9 and 9 is the lower surface part 5a of the transferred object 5 as described above.
Is lower than the transfer start height h ₁ in the case where it is necessary to lift it so as to be higher than the transfer work space 6 so as not to interfere with the skids 14, 14, and the height is limited to the space used at the transport start end. If there is, it can be dealt with sufficiently.

Then, the two airbags 4 and 4 are inflated by the same amount by the supply of pressurized air so that the object to be transported 5 is supported by both the airbags 4 and 4, and then the transfer action portions 9 and 9 are set. After being slightly lowered, it is taken out from the transfer work space 6 formed between the transported object 5 and the carriage 1 (see FIG. 1B).

At this time, since the inflation amounts of the two airbags 4 and 4 can be controlled arbitrarily by operating the pressure control valve, there is a gap between the lower surface 5a of the transferred object 5 and the upper surface 1a of the carriage 1. It is possible to form and secure the transfer work space 6 necessary and sufficient for inserting and removing the transfer operation units 9 and 9 in accordance with the accuracy of lifting and lowering of the transfer operation units 9 and 9.

When the transfer operation parts 9, 9 are pulled out from the transfer work space 6, each air bag 4 is operated by operating the supply / discharge switching valve.
By discharging air from both airbags 4,
4 is contracted flatly, the transported object 5 is lowered onto the trolley 1, and then the trolley 1 is made to travel to the transport end portion which is the destination (see FIG. 6C).

At this time, the air bags 4, 4 are in a flat state in which the air is completely exhausted in combination with the crushing action of the transported object 5, and the transfer work space 6 disappears. The height H ₀ is significantly smaller than the transfer height h _{0 in} which the transfer work space 6 is left as in the conventional dolly 11, and is sufficient even when the transfer path has a height limit. Can be dealt with. Moreover, since the flattened airbags 4 and 4 have a very small thickness, the transported object 5 has a mounting posture substantially the same as when it is directly mounted on the trolley upper surface 1a, and the transported object by the trolley 1 is transported. 5 can be conveyed in an extremely stable state. Air is discharged from both airbags 4 and 4 in synchronization with the flow rate control valve and at a slow speed so that the transported object 5 does not descend suddenly. By doing so, it is possible to safely lower the transported object 5 due to the contraction of the airbags 4 and 4.

In addition, when the object 5 to be conveyed is unloaded from the carriage 1 at the end of conveyance by the transfer machine, both airbags 4 and 4 are inflated and contracted in the reverse order of the above procedure. That is, the airbags 4 and 4 are inflated to lift the transported object 5 to form a transfer working space 6 under the transported object 5, and then the transfer working portions 9 and 9 are placed in the transfer working space 6. Is inserted (see FIG. 2B).

At this time, the flow rate control valve is operated to synchronously inflate the airbags 4 and 4 at the same speed, so that the transported object 5 is raised in a fixed posture.
By doing so, it is possible to lift the transported object 5 safely.

Then, the object 5 to be conveyed is supported by the transfer action portions 9 and 9, and the airbags 4 and 4 are contracted.
The transported object 5 is transferred from the trolley 1.

At this time, the air bags 4, 4 of the transported object 5
The transfer from the transfer operation section 9 to the transfer operation section 9 is performed at a level higher than the height of the lower surface 5a of the transported object 5 supported by the inflated airbags 4 and 4, that is, at a level higher than the transfer work space 6. Since it is not necessary to lift it, the support height of the transferred object 5 by the transfer action parts 9, 9 at that time, that is, the transfer start height H ₂ becomes the same as the transfer start height H ₁ at the time of loading, As described at the beginning, when the lower surface 5a of the transported object 5 is unloaded, the skid 1
Even when the transfer start height h ₁ is lower than the transfer start height h ₁ when the transfer work space 6 needs to be lifted so that it does not interfere with the transfer work space 4, 14, and there is a height limit at the transfer end portion. I can deal with it enough.

Further, according to the carrier truck 1 of this embodiment, even when the lower surface portion is a non-planar object to be transported,
This can be satisfactorily transferred and transported similarly to the above.

For example, as shown in FIG. 4, a step or
Transported object 5 having uneven portions 5b and 5c ₁For loading
If the inflation amount of each airbag 4 is different when loading or unloading
The transfer action parts 9 and 9 can be inserted and removed by tightening them.
It is necessary to form and secure a sufficient transfer work space 6
It can be done (refer to the same figure (A)). In addition, at the time of transportation, the recess 5
b By inflating only the airbag 4 underneath
The transported object 5₁Keep it stable and supported.
(See FIG. 2B).

Further, as shown in FIG. 5, as in the segments used to shield method, the lower surface portion 5d is about the conveyed object 5 ₂ has a convex shape such as a circular arc surface also, the expansion of each air bag 4 By appropriately adjusting, the transfer work space 6 is formed at the time of loading or unloading,
It can be secured (see FIG. 11A). Further, at the time of transportation, the amount of inflation of the airbags 4 and 4 can be reduced to reduce the transportation height H ₀ as much as possible (see (B) of the same figure).

By the way, the objects to be conveyed 5, 5₁, 5₂Contact with
The upper surface of the airbags 4 and 4 are
Since it is composed of a flexible sheet material,
5,5 ₁, 5₂Deforms according to the shape of the lower surface of the
It will be close to the department. Therefore, the transported objects 5, 5
₁, 5₂However, regardless of the shape of the bottom surface,
As described above, it may be damaged by contact with the skids 14, 14,
The support posture does not become unstable.

As described above, the necessary and sufficient transfer work space 6 is provided irrespective of the shapes of the lower surfaces of the transported objects 5, 5 ₁ , 5 _2.
In addition to being able to form and secure the carriage, it is possible to stabilize the transport posture, and the transport height H ₀ and the transfer start heights H ₁ and H ₂ are set to the necessary minimum, and there is a condition with a height limit. Good transfer and transport can be performed even under the condition.

The present invention is not limited to the above-described embodiments, but can be appropriately changed and improved without departing from the basic principle of the present invention.

For example, as shown in FIG. 1, when the airbags 4 and 4 can be contracted during transportation,
The pressurized air supply device 8 is not mounted on the carriage 1, but is provided at the transport start end and the transport end, and each supply / discharge pipe 7 is connected to the supply / discharge port 4a at the transport start end or the transport end, The airbags 4 and 4 may be inflated and deflated. Of course, as shown in FIG. 4 (B) or FIG. 5 (B), even when it is necessary to inflate the airbag 4 at the time of transportation, an opening / closing valve is provided in the supply / discharge port 4a so that the airbag 4 is also transported. If the airbag 4 is kept in a predetermined inflated state, the pressurized air supply device 8 is installed in the carriage 1 in the same manner as described above.
It does not need to be installed in.

Further, the number and arrangement of the airbags 4 can be arbitrarily set according to the shape of the lower surface of the transported object.
As shown in FIG. 6, four airbags 4 ... Are provided on the front, rear, left and right sides so that the mounting posture of the transported object on the carriage 1 can be adjusted not only in the front-back direction but also in the left-right direction. Further, as shown in FIG.
When the airbag 4 is in a contracted state, the recess 1c is provided in a so that the airbag 4 is retracted into the recess 1c so that the transported object 5 is directly placed on the truck upper surface 1a. You may stay. By doing so, the transporting posture of the transported object 5 becomes more stable, and the transport height H ₀ becomes lower.

When it is not necessary to make the inflation amounts of the airbags 4 different, it is possible to inflate and deflate a plurality of airbags 4 at once. Further, the inflation and deflation control of each airbag 4 can be automatically performed in conjunction with the traveling of the carriage 1 and the operation of the transfer machine.

[0039]

As can be easily understood from the above description, according to the present invention, the transfer height and the transfer start height can be made as low as possible, and the upper space such as a gallery can be made. Even in places where the use is restricted, the transported object can be transferred and transported satisfactorily. Moreover, regardless of the shape of the transported object, a sufficient transfer work space can be formed and secured, and the transported object can be transported in a stable posture. Therefore, even when a plurality of types of transported objects having different shapes are transported, it can be generally used.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a carrier truck according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a sectional view of a main part taken along the line III-III in FIG.

FIG. 4 is a side view corresponding to FIG. 1 showing a usage example different from FIG.

5 is a side view corresponding to FIG. 1 showing a usage example different from FIGS. 1 and 4. FIG.

FIG. 6 is a plan view corresponding to FIG. 2 showing another embodiment.

FIG. 7 is a sectional view corresponding to FIG. 3 showing still another embodiment.

FIG. 8 is a side view showing a conventional truck.

9 is a side view corresponding to FIG. 8 showing an example of use different from FIG.

FIG. 10 is a side view corresponding to FIG. 8 showing a usage example different from FIGS. 8 and 9;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transport vehicle, 1a ... Top surface of the transport vehicle, 4 ... Air bag, 4a ... Supply / discharge port, 5, 5 ₁ , 5 ₂ ... Transported object, 6 ... Transfer work space, 8 ... Pressurized air supply device , 9 ... Transfer operation part.

Claims (2)

[Claims] 1. A plurality of airbags, which are inflated and contracted by supplying and discharging pressurized air in place of skids, are provided on the upper surface of the bogie, and an object to be conveyed on the bogie is inflated by the upper surface of the bogie. A carrier truck, characterized in that a predetermined transfer work space is formed between the unit and the unit to support and place the work space. 2. The carrier vehicle according to claim 1, wherein each of the airbags receives and discharges pressurized air separately.