JP2013139667A - Lift truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lift truck which delivers segment pieces of a small-diameter shield segment to an erector supply position, for delivering the segment pieces to a truck which supplies them to an erector.SOLUTION: The lift truck for supplying the segment pieces to the erector as a tunnel is bored by a shield machine delivers the segment pieces between a segment conveyance truck and an erector supply truck while adjusting the heights thereof. It includes two arm parts arranged between the truck body part and the platform of the lift truck obliquely intersecting each other, and provided in the directions of both sides of the lift truck. The inclination angles of the arm parts are changed to incline the platform.

Description

  The present invention relates to a lift carriage used in a small-diameter shield segment transfer device when a small-diameter shield tunnel is constructed.

The shield method is used as a method for constructing pipes such as sewer pipes.
In the shield construction method, pipes are constructed by sequentially assembling segments on the inner periphery of a small-diameter tunnel excavated by a shield machine.
Therefore, it comprises a shield machine, an erector for assembling a segment on the excavation surface excavated by the shield machine, and a transport mechanism for supplying segment pieces for constructing the segment.

  For example, an apparatus used for carrying out the shield method shown in Japanese Patent Laid-Open No. 2001-140599 (Patent Document 1) is shown, and further, Japanese Patent Laid-Open No. 2002-4796 (Patent Document 2) and Japanese Patent Laid-Open No. 2002-4800 (Patent Document). 3), a segment conveying method disclosed in Japanese Patent Laid-Open No. 2001-200700 (patent document 4), and a construction apparatus disclosed in Japanese Patent Laid-Open No. 2004-183419 (patent document 5).

JP 2001-140599 A JP 2002-4796 A JP 2002-4800 JP 2001-200700 A JP 2004-183419 A

  As described above, with respect to the shield construction method comprising the shield machine, the erector for assembling the segment on the excavation surface excavated by the shield machine, and the transport mechanism for supplying the segment piece for constructing the segment, the segment piece is used. The pipes are constructed by sequentially supplying and assembling the segments with a selector on the inner periphery of the tunnel.

However, first, the configuration shown in Patent Document 1 shows a configuration in which the segment piece is transported in the upper or lower part of the mine shaft. However, when configured in this way, the segment piece can be used only for transporting the segment piece, and other transports are performed. The space required for is extremely narrow.
In particular, it is not suitable for a small-diameter shield.

Furthermore, although the structure shown in patent documents 2 and 3 shows the state which mounts and conveys a segment piece on a trolley | bogie, the structure suitable for especially a small aperture is not specified.
Furthermore, although the structure shown in Patent Document 4 shows a structure suitable for a small diameter, the loader on which the segment piece is placed on the rail is moved and supplied. The segment piece is moved onto the lifting device, and the segment piece is further moved to an arbitrary height by the lifting device.

In this case, the lift base changes its vertical height at the place of placement.
Therefore, after moving to an arbitrary position, it is lowered to the tunnel bottom using an inclined plate.
This means that it is necessary to change the segment pieces, which are sequentially carried, one by one to a certain height while maintaining the horizontal state by the lift device, and after this, the inclined plate is further arranged at the required position and then the bottom surface. It is necessary to move.

In this case, in order to supply the next segment piece to the erector, it is necessary to further return the mounting table to the height of the rail.
Also, the lift device needs to be pulled with a wire or the like as the shield machine progresses.
Therefore, it takes time and effort, and there is a demand for a small-diameter shield segment conveying device that can easily and safely send segment pieces.

Next, in the configuration shown in Patent Document 5, after the segment piece is moved by the carriage, the segment piece is transferred to one lifter carriage, and the conveying position of the roller conveyor is moved up and down by the jack.
Therefore, after moving up and down by this lifter carriage, it is transferred to the roller conveyor and supplied to the erector.

This configuration is also the same as that of Patent Document 4, and is moved up and down after being transferred to a lifter carriage to be supplied to the erector by a lifter carriage, and further transferred to a roller on a conveyor and sent to the erector.
Therefore, it is necessary to stop the segment piece with the lifter carriage and then lower the lifter to change its height, and it is necessary to send the segment piece in the parallel direction after lowering to an arbitrary height.

  Therefore, according to the first aspect of the present invention, the segment piece conveyed by the segment conveying carriage is constructed as an erector in order to assemble the segments sequentially on the inner periphery of the small-diameter tunnel excavated by the shield excavator. A lift truck for feeding, wherein the lift truck is a lift truck for adjusting the height between the segment conveying carriage and the erector feeding carriage to send the segment pieces, and at least the lift carriage is a vehicle body The two arm portions are arranged obliquely between the vehicle body portion and the base, and have the two arm portions on both sides of the lift carriage. The tilt angle of the arm can be changed, and the arm is composed of a lift cart that tilts by controlling the position of the platform with respect to the vehicle body. It can solve the above problems.

  In this case, as in the invention according to claim 2, it may be a lift truck having a rear support part between the body part and the base in the direction of the segment transporting carriage of the lift truck, or the invention according to claim 3. In this way, a lift truck having a front support portion between the vehicle body and the base in the direction of the lift truck erector may be used.

Since it comprised as mentioned above, according to the invention which concerns on Claim 1, it can send a segment piece from a segment conveyance trolley to an inclination conveyance trolley, and can send a segment piece appropriately to an inclination conveyance trolley especially It is.
This makes it possible to adapt the inclined surface of the inclined transport carriage and the inclined surface of the lift truck by allowing the lift carriage to be inclined, so that the segment pieces can be sent efficiently and safely.
Therefore, it is possible to send the segment piece to the erector supply position simply by pushing and sending the segment piece without using any special and expensive equipment.
In particular, it is possible to incline the platform of the lift carriage using two arm portions and to raise and lower the platform as necessary.
Furthermore, according to the inventions according to claim 2 and claim 3, the rear support part and the front support part can hold the segment piece placed on the base of the lift carriage firmly and stably even when the base is inclined, Particularly, a heavy segment piece can be appropriately placed and further pushed toward the erector.

The figure which shows the state of one implementation of the conveyance mechanism of the segment for small diameter shields using the lift trolley | bogie which concerns on this invention. The figure which shows the state of one implementation of the conveyance mechanism of the segment for small diameter shields using the lift trolley | bogie which concerns on this invention. The figure which shows the state of one implementation of the conveyance mechanism of the segment for small diameter shields using the lift trolley | bogie which concerns on this invention. The figure which shows the state of one implementation of the conveyance mechanism of the segment for small diameter shields using the lift trolley | bogie which concerns on this invention. The figure which shows the state of one implementation of the conveyance mechanism of the segment for small diameter shields using the lift trolley | bogie which concerns on this invention. The figure which shows the state of one implementation of the conveyance mechanism of the segment for small diameter shields using the lift trolley | bogie which concerns on this invention. The figure which shows an example of the lift trolley | bogie which concerns on this invention. The figure which shows another example of the lift trolley | bogie which concerns on this invention. The figure which shows an example of the state which the lift trolley | bogie which concerns on this invention shown in FIG. 8 inclines The figure which shows an example of the state by which the segment piece is mounted in the base of the lift trolley shown in FIG.

FIG. 1 is a diagram showing an example of an implementation state of a small-diameter shield segment conveying mechanism according to the present invention.
As shown in this figure, the shield construction method is used as a construction method for sewage pipes, etc., and the pipes are constructed by sequentially assembling segments on the inner circumference of a small-diameter tunnel excavated by a shield machine. It is a figure which shows the construction mechanism for going.
While excavating with a shield machine, segments are supplied in order to build a pipeline.

For example, the segment piece 1 is placed on the segment conveyance carriage 2 and conveyed to the vicinity of the erector 6 by the electric railcar 3, and the segment piece 1 on the segment conveyance carriage 2 is transferred by the lift carriage 4 and further inclined. It is sent to the supply position of the erector 6 by the transport carriage 5.
A roller is disposed at the position of contact with the segment piece 1 on the upper surface portion of the segment carriage 2, the lift carriage 4, and the inclined conveyance carriage 5, and the segment piece 1 on each carriage is at least in the direction of the erector 6. Can be moved to.

Therefore, after the segment piece 1 on the segment conveyance carriage 2 is transferred to the lift carriage 4, the lift carriage 4 is inclined, and subsequently, the inclined conveyance carriage 5 is further provided to convey the segment piece 1 on the rail. It can be lowered from the height of the carriage 2 to the supply height to the erector 6 using the plurality of various carriages.
In particular, the height in the vertical direction can be moved from the segment conveyance carriage 2 to the supply height to the erector 6 using a roller.

Therefore, it can be easily transported to the supply position of the erector 6 by, for example, pushing by hand.
The inclined conveyance cart 5 also functions as a conveyor, and in the drawing, the inclined conveyance cart 5 is an example in which four inclined conveyance carts 5 each having an inclined conveyance platform are used.

FIG. 2 is an enlarged view of the segment transport cart 2, the lift cart 4, and the inclined transport cart 5, and shows an example of a state in which the placement surface before the lift cart 4 is tilted is maintained horizontally.
In this state, the segment piece 1 on the segment transport carriage 2 is transferred to the lift truck 4 by the rollers having the respective placement surfaces on the transport stage.
The lift carriage 4 further has an inclined transport carriage 5 in the direction of supplying the erector 6.

There are a total of four inclined transport carts 5, and the transport platform is tilted so as to gradually move from a position lower than the horizontal plane of the lift cart 4 to a lower position. The inclined surfaces are aligned.
The lift truck 4 maintains a horizontal state in the figure, and can be tilted as necessary.

FIG. 3 is a diagram showing a state in which the horizontal lift carriage 4 shown in FIG. 2 is inclined, and the segment piece 1 can be sent along the inclination to the inclined conveyance carriage 5 by this inclination.
In other words, the height of the lift carriage 4 in the direction of the segment conveyance carriage 2 is maintained the same as that of the segment conveyance carriage 2, and the lift carriage 4 is inclined by lowering the opposite direction.

In particular, an inclined conveyance carriage 5 is further positioned in the direction of the lowered lift carriage 4, and the heights in the direction in which both are in contact with each other are the same.
There are four such inclined conveying carts 5, and the segment piece 1 is transferred to the erector 6 supply position in the tunnel lower direction by the lift cart 4 and the inclined conveying cart 5.
Therefore, the segment piece 1 on the lift carriage 4 can be supplied in the direction of the erector 6 using this inclination.

  2 and 3 show a configuration in which the lift piece 4 is tilted after the segment piece 1 is transferred from the segment transport carriage 2 to the lift carriage 4. However, the present invention is not limited to this. Of course, it may be transferred from the transport carriage 2 in the direction of the erector 6 through the inclined transport carriage 5 using this inclination.

That is, as shown in FIGS. 4 and 5, there may be a slight distance between the segment conveyance carriage 2 and the inclined conveyance carriage 5, for example, a distance longer than the length of the lift carriage 4.
Since the excavator is gradually excavated by the shield machine and the position of the erector 6 moves as necessary, the segment transport carriage 2 and the erector are easily adapted to the movement. 6 can appropriately cope with a change in the distance between the inclined conveying cart 5 and the inclined conveying cart 5.

  First, as shown in FIG. 4, when the segment piece 1 is placed and transported on the segment transport carriage 2, the segment piece is first moved onto the lift truck 4 in a horizontal state, and the lift having this segment piece 1 The carriage 4 is moved and this time is sent to the inclined conveyance carriage 5 near the erector 6.

Further, as shown in FIG. 5, the lift carriage 4 is moved to a position adjacent to the inclined conveyance carriage 5, and then the lift carriage 4 is inclined and lifted by matching with the inclined surface of the inclined conveyance carriage 5. The segment piece 1 on the carriage 4 is fed obliquely downward by the respective rollers in the erector supply direction.
In particular, by having a plurality of inclined transport carts 5, the segment piece 1 can be safely and easily sent to the erector supply position.

FIG. 6 is a diagram illustrating an example of a state in which the segment piece 1 is further sent from the lift carriage 4 to the inclined conveyance carriage 5.
The segment piece 1 sent from the segment conveyance carriage 2 is sent onto the lift carriage 4 and further lowered to a height that matches the height of the inclined conveyance carriage 5. Further, the lift carriage is inclined along the inclined surface of the inclined conveyance carriage 5. An example of a state in which 4 becomes 4 is shown.

That is, it is a diagram showing an example in which the segment piece 1 is sent onto the inclined conveyance carriage 5 after the lift carriage 4 is inclined and the placement surface is inclined.
Thus, since the conveyance surface which is the placement surface of the segment piece 1 of the lift carriage 4 and the inclined conveyance carriage 5 constitutes one inclined surface, the segment piece 1 is supplied to the erector 6 supply position by the rollers on the placement surface. Will be sent in the direction.

FIG. 7 is a diagram showing an example of the lift truck 4 according to the present invention.
The lift truck 4 has wheels at the lower part of the vehicle body and can move on the track. Further, a roller 42 is provided on the base 41 on which the segment piece 1 is placed.
Therefore, the segment piece 1 can be placed and the table 41 can be fed by the roller 42.

In the lift truck 4, two arm parts 44 are arranged obliquely between the vehicle body part 43 and the base 41, and by changing the inclination angle of each arm part 44, The base 41 of the lift truck 4 can be changed from a horizontal state to an inclined state, and the base 41 can be raised and lowered by changing the distance between the vehicle body portion 43 and the base 41 of the lift truck 4.
Further, two arm portions 44 are respectively provided on both sides of the lift carriage 4, and the position of the base 41 is controlled by using the total four arm portions 44.

In this case, a rear support portion 46 is provided between the vehicle body portion 43 and the base 41 below the base 41 in the direction of the segment transport carriage 2.
Thereby, for example, the height of the carriage 41 of the lift carriage 4 and the height of the conveyance carriage of the segment conveyance carriage 2 can be made to coincide with each other, or the height necessary for taking an arbitrary inclination angle is obtained. Thus, the height at which the segment piece 1 on the transport carriage 2 can be moved from the segment transport carriage 2 onto the carriage 41 of the lift carriage 4 can be maintained, or the inclination angle can be maintained.

The rear support portion 46 has a support extending between the vehicle body portion 43 and the base 41 of the lift truck 4 from the beginning, and does not move up and down with respect to the distance between the two, but remains constant, but has a slight inclination for tilting. A configuration having a gap may be used.
Alternatively, as shown in FIG. 8, in addition to the rear support portion 43, there is a front support portion 45 between the vehicle body portion 43 and the base 41 below the base 41 in the leading direction of the lift carriage, that is, in the direction of the inclined transport carriage 5. It may be.

The height of the pedestal 41 can be positioned by the front support portion 45 by using the lifting / lowering arm portion 44 of the lift trolley 4, and the height of the transport pedestal of the inclined transport trolley 5 following the lift trolley 4 can be matched. .
As a result, the segment piece 1 on the transport platform can be moved from the segment transport cart 2 onto the platform 41 of the lift cart 4 and further sent to the inclined transport cart 5.
In this case, the front support portion 45 is shorter than the rear support portion 46 and can determine the inclination angle.

For example, the front support portion 45 can control the height of the lift truck base 41 and the height of the transport carriage of the inclined transport carriage 5 so that the slope can be created up to this position.
Thus, the segment piece 1 can be sent from the lift carriage 4 to the inclined conveyance carriage 5 and the segment piece 1 can be easily and safely moved by the respective inclinations.
Furthermore, the heavy segment piece 1 can be stably and safely held, and can be stably fed especially in an inclined state.

FIG. 9 shows a state in which the arm 44 for raising and lowering or tilting the lift truck 4 is lowered and the base 41 of the lift truck 4 is tilted by the front support section 45 and the rear support section 46 by the support sections. It is a figure which shows an example which was made to localize correctly and was stabilized.
By doing in this way, if necessary, the lift truck 4 can be placed in an inclined position, and even if a heavy object is placed, the segment piece can be stably conveyed or sent.

As for the configuration of the arm portion 44 for raising and lowering or tilting, in addition to changing the inclination angle of the arm portion 44, the length of the arm portion 44 can be changed by a hydraulic jack, an air jack, or mechanically changing the lift truck 4. The base 41 may be changed from the horizontal state to the inclined state, or from the inclined state to the horizontal state by tilting and raising / lowering.
Further, the configuration using the front support portion 45 and the rear support portion 46 is an example, and the position control by the electronic control is performed when the base 41 is changed from the horizontal state to the inclined state or when the base 41 is changed by raising and lowering from the inclined state to the horizontal state. Of course, a mechanism or other generally known positioning structure may be used.

FIG. 10 is a diagram illustrating an example in which the segment piece 1 is placed on the lift carriage 4.
The segment piece 1 obtained by dividing the segment into five in the circumferential direction is transported, and further, the segment is transported with the arcuate shape direction in the traveling direction.
The segment piece 1 is transported by placing the outer peripheral surface on the lower side, that is, in the direction in contact with the segment transport carriage 2. The outer peripheral surface direction touches.

Further, the table 41 itself on which the segment piece 1 is placed is also provided with a roller 42 so as to be in contact with the outer peripheral surface of the segment piece, so that the roller 42 contacts the segment piece 1 and can be transported.
For example, even if a roller box in which a large number of rollers 42 are arranged is placed on both sides and this is connected by a vehicle body arm 47 to form a table 41 on which the segment piece 1 is placed, or the roller 42 is placed at an arbitrary position. A plurality of mounting tables may be configured.

DESCRIPTION OF SYMBOLS 1 Segment piece 2 Segment conveyance trolley 3 Electric railcar 4 Lift trolley 41 Base 42 Roller 43 Car body part 44 Arm part 45 Front support part 46 Back support part 47 Car body arm 5 Inclined conveyance truck 6 Elector

Claims (3)

Lift carriage 4 for supplying segment piece 1 conveyed by segment conveyance carriage 2 to erector 6 in order to assemble segments sequentially in the inner circumference of a small-diameter tunnel excavated by a shield excavator. Because
The lift carriage 4 is a lift carriage 4 for feeding the segment piece 1 by adjusting the height between the segment transport carriage 2 and the carriage for supplying the erector 6;
At least the lift truck 4 has a vehicle body part 43 and a base 41, and two arm parts 44 are arranged in an oblique manner between the vehicle body part 43 and the base 41. Arm portions 44 in both directions of the lift carriage 4,
A lift truck characterized in that the base 41 is tilted by changing the tilt angle of the arm portion 44. The lift carriage according to claim 1, further comprising a rear support portion between the vehicle body portion and the stand and below the stand in the direction of the segment conveyance carriage of the lift carriage. The lift truck according to claim 2, further comprising a front support portion 45 between the vehicle body portion 43 and the base 41 and below the base 41 in the direction of the erector 6 of the lift truck 4.

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