JP6309045B2 - Vertical conveyor - Google Patents

Description

  The present invention can continuously collect and install transported items (such as earth and sand) spilled from the vertical part and the lower horizontal part without depositing under the shaft conveyor and without human power. The present invention relates to a vertical conveyor that does not require a separate space, has a simple overall configuration, is easy to clean and maintain, and can reduce costs.

  Civil works, tunnel construction (shield construction method, mountain construction method, etc.) Especially shield construction can be used to build a tunnel by efficiently excavating the ground using a shield machine, and is often adopted as an excellent construction method with little impact on the ground. ing. The earth and sand excavated by the shield machine is transported from the inside of the mine to the bottom of the shaft using a steel car or a belt conveyor. Furthermore, from the bottom of the shaft to the ground, many methods such as a method of transporting to the ground by a combination of a steel car or a bucket and a crane, a method of transporting by a skip, a method of transporting by a bucket type elevator have been used.

  However, with the above method, there is a certain limit to the sediment transport capacity, so as the depth of the shaft and the cross section of the shield tunnel increase, the transport capacity required for the necessary sediment transport will increase. Therefore, the development of new transportation means has been demanded. Therefore, in recent years, as a response to this demand, for example, as shown in Japanese Patent Application Laid-Open No. 2012-144340 (Patent Document 1), two types of belts are used, and the belt is continuously conveyed while sandwiching earth and sand between the belts. Vertical conveyors that can be used have been developed and adopted for various civil engineering works.

  The vertical conveyor as in Patent Document 1 is a device that can safely and efficiently convey excavated earth and sand discharged in shield construction from the bottom of the shaft to the ground. There is a problem that it is not possible to completely eliminate the spillage of sand and sand mainly from the gap between the belts when transporting the sand and sand with the belt.

In addition, the range in which earth and sand are spilled from a vertical conveyor is limited to the range of the bottom plane of a vertical conveyor. Until now, the transport amount per unit time was relatively small at 50-100 m ³ / h, and the spilled amount was only a few percent of the transport amount. However, a simple countermeasure was adopted in which the paper was collected with a scoop (removed on the conveyor and transported).

  However, since the manual collection process is performed at the position where the earth and sand fall, it is a dangerous and inferior environment that may cause a (relatively large) stone to hit the worker directly. There is a problem that it is difficult to allocate workers to collect spilled earth and sand as the working population declines and the worker ages.

  If the spilled sediment is not collected, it will accumulate from the bottom of the shaft, which will adversely affect the driving of the belt and rollers of the vertical conveyor, causing machine failures and troubles (including electrical troubles). In addition, other equipment inside the shaft is also adversely affected, and as a result, in the worst case, it causes a serious problem that the shield excavation work must be stopped.

  On the other hand, for example, if the transport amount per unit time is larger than the above, the spilling amount is also larger than the above, and if there is a vacant space around the lower part of the vertical conveyor, if spilled sediment can be deposited to some extent, It was left to accumulate until a predetermined amount was reached and collected using a heavy machine such as a power shovel or a loading machine.

  However, the fact that there is enough space to put heavy machinery and loading machinery around the lower part of the vertical conveyor means that there is wasted space, and the construction conditions such as the size of the shaft to be built and the size of the tunnel are good. Without matching, it is impossible to secure a large space.

  Temporarily, in the case of construction conditions where a large space cannot be provided around the lower part of the vertical conveyor, it is necessary to change the structure such as increasing the depth of the shaft and to provide a space below the vertical conveyor, A large amount of money is required for work other than the excavation itself.

  Moreover, in any of human power, heavy machinery, and loading machines, the collected earth and sand will be loaded again on the vertical conveyor and discharged, so if there is a large amount of earth and sand, the vertical conveyor must be operated while working. However, this means that safety cannot be ensured.

  In order to ensure safety, if the vertical conveyor is to be operated or stopped only for sediment collection, it will be performed when the entire shield excavation work is suspended. If it is, you have to concentrate on a short time such as Sunday, and the workers will be forced to meet the harsh conditions accordingly.

  As described above, the work to collect spilled sand from the vertical conveyor has a lot of restrictions, and it is difficult to handle appropriately and appropriately, and in some cases even if the shield excavation work is temporarily stopped Recovery work had to be prioritized, and as a result, the overall efficiency of shield excavation work was reduced.

JP 2012-144340 A

  The problem to be solved is that the conventional vertical conveyor has no consideration for properly collecting the sediment deposited by spilling between the two belts in the vertical direction without wasting work space. .

  In order to solve the above-described problems, the present invention provides a lower horizontal portion that is horizontally conveyed at a lower position, an upper horizontal portion that is horizontally conveyed at an upper position, and a vertical conveyance between the lower horizontal portion and the upper horizontal portion. An inner conveyor belt formed as a continuous path, and a position of the end of the lower horizontal part and a part of the upper horizontal part around the vertical part of the inner conveyor belt as a reciprocating path. A vertical conveyor having an outer conveyor belt installed along a conveyor belt conveying surface, and bent downward substantially vertically along the return path immediately before the reverse position of the return path and the return path of the lower horizontal portion of the inner conveyor belt. Forming the vertical conveying section, and the upper ends are spaced apart from each other so that the upper ends protrude from both ends of the width of the inner conveyor belt below the lower horizontal section and below the vertical section. Is provided with a pair of collecting plates arranged in an inclined manner so that the lower ends approach each other in the width direction of the inner conveyor belt, and below the lower ends of the pair of collecting plates. A recovery conveyor having a continuous path of a recovery horizontal portion that is transported from a position below the vertical portion to the front of the vertical transport portion and a recovery vertical portion that is transported along the vertical transport portion to the forward path of the horizontal portion. A belt was provided.

  In the vertical conveyor having the above-described configuration, even when soil and sand conveyed between the inner conveyor belt and the outer conveyor belt are spilled from between the inner conveyor belt and the outer conveyor belt, they are collected below the vertical conveyor. The horizontal portion of the inner conveyor belt is collected on the recovery conveyor belt by the plate and is sandwiched between the vertical conveyance portion of the inner conveyor belt and the recovery vertical portion of the recovery conveyor belt via the recovery horizontal portion of the recovery conveyor belt. Since it is returned to the forward path (conveying surface), it is possible to continuously collect spilled earth and sand without manpower and with the operation of the vertical conveyor.

It is a figure which shows schematic structure of the vertical conveyor of this invention. It is the sectional view on the AA line of FIG. 1 of the vertical conveyor of this invention. It is the BB sectional drawing of FIG. 1 of the vertical conveyor of this invention. It is the C section enlarged view which abbreviate | omitted the lower horizontal frame of FIG. 1 of the vertical conveyor of this invention. It is a fragmentary sectional view like FIG. 2 which shows the other example of the vertical conveyor of this invention.

  The vertical conveyor according to the present invention has not been able to efficiently collect sediment that has been spilled from between two belts in the vertical direction, without using human power, and without wasting work space. A vertical collection point is provided below the vertical part of the inner and outer conveyor belts, and a pair of collecting plates for receiving soil spilled from the vertical part is provided, and the sediment collected by the paired collecting plates is formed on the inner conveyor belt. This problem has been solved by providing a recovery conveyor belt having a recovery horizontal portion that is transported to the transport portion and a recovery vertical portion that is transported along the vertical transport portion to the forward path of the inner conveyor belt.

  Further, the vertical conveyor of the present invention, instead of providing the above-described recovery plate, makes the recovery conveyor belt wider than the width of the inner conveyor belt, and in the recovery horizontal portion, from the width ends toward the width center. You may incline below. In this way, the height dimension can be reduced, and a support member (frame body) for providing the recovery plate can be omitted.

  A more specific example of the above embodiment will be described with reference to FIGS. In the figure, No. 1 discharges the earth and sand discharged from the tunnel tunnel under construction through the shaft (vertical part) to the ground, and transports the earth and sand vertically from the underground to the ground in this shaft. It is the vertical conveyor of this invention which collects the earth and sand which spills when it collects, and does not accumulate in the lower part of a shaft, for example, is comprised as follows.

  Reference numeral 2 denotes a lower horizontal frame provided horizontally at the lower position, for example, the underground side of the shaft in the shield excavation method. Reference numeral 3 denotes an upper horizontal frame provided horizontally on the upper position, for example, the ground side. Reference numeral 4 denotes a vertical frame provided between the lower horizontal frame 2 and the upper horizontal frame 3.

  The lower horizontal frame 2, the upper horizontal frame 3, and the vertical frame 4 are connected to each other to form a frame in the entire structure of the vertical conveyor 1. Since the lower horizontal frame 2, the upper horizontal frame 3, and the vertical frame 4 are actually adjusted appropriately depending on the construction scale, in the drawing, the installation status of the inner conveyor belt 5 and the outer conveyor belt 6 described later can be grasped. Simplified to a certain extent.

  5 is an inner conveyor belt that extends over the lower horizontal frame 2, the vertical frame 4, and the upper horizontal frame 3, this order being the forward path, and the upper horizontal frame 3, the vertical frame 4, and the lower horizontal frame 2 being the return path. is there. In the inner conveyor belt 5, the path of the lower horizontal frame 2 is the lower horizontal part of the inner conveyor belt 5, the path of the upper horizontal frame 3 is the upper horizontal part of the inner conveyor belt 5, and the path of the vertical frame 4 is the inner conveyor belt 5. Say the vertical part.

  A head pulley 51, which is a drive pulley for reversing from the forward path to the return path, is provided in the upper horizontal portion of the inner conveyor belt 5 together with power (not shown), while the lower horizontal portion of the inner conveyor belt 5 is reversed from the return path to the forward path. A tail pulley 52, which is an idler pulley, is provided. Further, a bend pulley (no reference number) is provided at a transition position between the lower horizontal portion, the vertical portion, and the upper horizontal portion of the inner conveyor belt 5. In addition, components of the belt conveyor such as a snap pulley, a tension pulley, a return roller, etc. are not shown and are not given reference numerals, and will not be described.

  Further, the inner conveyor belt 5 is a lower horizontal portion on the return path, and a vertical conveyance section 5A that is bent downward on the return path is formed before the reverse position from the return path to the forward path, that is, before the end pulley 52.

  6 is an outer conveyor belt constructed along the inner conveyor belt 5 at the end positions of a part of the lower horizontal frame 2 and the upper horizontal frame 3 with the vertical frame 4 as the center. As with the inner conveyor belt 5, the outer conveyor belt 6 also has a path for a part of the lower horizontal frame 2 as a path for the lower horizontal part of the outer conveyor belt 6 and a path for a part of the upper horizontal frame 3 as an outer conveyor belt. The upper horizontal portion 6 and the path of the vertical frame 4 are referred to as a vertical portion of the outer conveyor belt 6.

  A head pulley 61, which is a drive pulley for reversing from the forward path to the backward path, is provided in the upper horizontal portion of the outer conveyor belt 6 together with power (not shown), while the lower horizontal section 6a of the outer conveyor belt 6 is moved from the backward path to the forward path. A tail pulley 62 that is an idler pulley to be reversed is provided. Further, a bend pulley (no reference number) is provided at a transition position between the lower horizontal portion, the vertical portion, and the upper horizontal portion. In addition, components of the belt conveyor such as a snap pulley, a tension pulley, a return roller, etc. are not shown and are not given reference numerals, and will not be described.

  The inner conveyor belt 5 and the outer conveyor belt 6 are provided so as to be in close contact with each other in the vertical portion. Specifically, the lower horizontal portion of the outer conveyor belt 6 is in contact with the lower horizontal portion of the inner conveyor belt 5 immediately before the vertical portion. The upper horizontal portion of the outer conveyor belt 6 is separated from the upper horizontal portion of the inner conveyor belt 5 through the vertical portion and immediately after the vertical portion.

  7 is a collection plate that forms a pair provided at a position below the vertical frame 4 that lays the vertical portions of the inner conveyor belt 5 and the outer conveyor belt 6 and at a position below the lower horizontal frame 2 that lays the lower horizontal portion, In this example, it is provided from a position below the vertical frame 4 to immediately before the vertical conveyor 5A of the inner conveyor belt. In this example, the pair of collecting plates 7 are separated such that their upper ends protrude from both ends in the width direction orthogonal to the longitudinal direction of the lower horizontal frame 2 and the lower ends are within the width dimension of the inner conveyor belt 5. Thus, it is arranged in an inclined shape approaching the width central direction.

  8 is a recovery horizontal portion 8A that conveys from the lower position of the lower ends of the pair of collection plates 7 to the front of the vertical conveyance portion 5A of the inner conveyor belt 5, and a lower portion of the inner conveyor belt 5 along the vertical conveyance portion 5A. This is a recovery conveyor belt having a continuous path with a recovery vertical part 8B that conveys to the forward path in the horizontal part.

  The recovery vertical portion 8A of the recovery conveyor belt 8 is configured to be in close contact with the vertical transfer portion 5A by a bend pulley and a tail pool 62 that form the vertical transfer portion 5A of the inner conveyor belt 5. Further, the recovery conveyor belt 8 operates in synchronization with the inner conveyor belt 5 (and the outer conveyor belt 6).

  9 is a discharge conveyor which conveys the earth and sand discharged in the tunnel resistance from the inside of the tunnel. Various feeders may be used to transport earth and sand from the inside of the mine, but in this example, it will be described as a conveyor. Moreover, in this example, the earth and sand discharged | emitted from the inside of the tunnel under construction in the illustrated paper depth direction are conveyed to the discharge conveyor 9, and are demonstrated in the example conveyed to the lower horizontal part 5a of the inner conveyor belt 5. FIG.

  Operations of the inner conveyor belt 5, the outer conveyor belt 6, and the recovery conveyor belt 8 in the vertical conveyor 1 having the above configuration will be described. The earth and sand conveyed from the discharge conveyor 9 is discharged to the lower horizontal portion of the inner conveyor belt 5. In the vertical conveyor 1, the outer conveyor belt 6 is separated from the middle in the conveying direction of the lower horizontal portion of the inner conveyor belt 5 through the vertical portion and in the middle of the conveying direction of the upper horizontal portion immediately after the vertical portion. It is driven in a state of being in close contact with 5.

  The earth and sand sandwiched between the vertical portions of the inner conveyor belt 5 and the outer conveyor belt 6 are spilled at a predetermined rate. The spilled earth and sand is received by the collecting plate 7 located below the vertical frame 4 and is collected. Are collected in the collection horizontal portion 8A. The earth and sand transported by the recovery horizontal part 8A of the recovery conveyor belt 8 is sandwiched between the vertical transfer part 5A (of the inner conveyor belt 5) and the recovery vertical part 8B (of the recovery conveyor belt 8), and the lower horizontal of the inner conveyor belt 5 Returned to the transport surface of the part.

  As described above, the vertical conveyor 1 of the present invention can continuously collect earth and sand spilled from the vertical part and the lower horizontal part without depositing in the shaft and without human power, Since the sediment is sandwiched and collected in the vertical conveyance part 5A at the tail pulley 52 side end of the lower horizontal part, the construction length of the collection conveyor belt 8 may be relatively short, and the lift of the vertical conveyance part 5A and the collection vertical part 8B Therefore, there is an advantage that it is not necessary to separately provide a space for installing the recovery conveyor belt 8 including the recovery plate 7.

  Furthermore, since the vertical conveyor 1 of the present invention has a relatively short length of the collection conveyor belt 8 and the lifts of the vertical conveyance unit 5A and the collection vertical unit 8B are relatively small, the power of the collection conveyor belt 8 is Since the output of the conveyor belt 8 can be a normal flat belt and the overall configuration is simple, cleaning and maintenance can be easily performed. There is also an advantage that the overall cost including the maintenance cost can be suppressed.

  Moreover, the vertical conveyor 1 of this invention WHEREIN: The collection board 7 can also be abbreviate | omitted in the said structure. When the collection plate 7 is omitted, as shown in FIG. 5, the collection conveyor belt 8 is made wider than the width of the inner conveyor belt 5, and in the collection horizontal portion 8A, the width from both ends of the collection conveyor belt 8 is lowered downward toward the center of the width. Just tilt it.

  By doing so, the frame body and jig for supporting the recovery plate 7 become unnecessary, and a space in the height direction for arranging the recovery plate 7 in an inclined shape becomes unnecessary. Compared with the configuration of the embodiment described up to 4, it is possible to further reduce the size and reduce the cost.

  As described above, the vertical conveyor 1 according to the present invention mainly has a function of transporting the sediment accumulated on the inner conveyor belt 5 vertically in cooperation with the outer conveyor belt 6 in the vertical portion. 5 is further provided with a function of collecting earth and sand spilled from the vertical portion and the lower horizontal portion. According to this configuration, the function of the entire vertical conveyor 1 is improved, a conveyor that has to be separately installed is not required, and a rational mechanism is obtained. As a result, the power required for collecting spilled earth and sand is reduced. In addition, since the space required for installing the vertical conveyor 1 is very small, it is possible to relax the constraint conditions for installation.

1 Vertical conveyor 2 Lower horizontal frame (lower horizontal part)
3 Upper horizontal frame (upper horizontal part)
4 Vertical frame (vertical part)
5 Inner Conveyor Belt 5A Vertical Conveying Section 6 Outer Conveyor Belt 7 Collection Plate 8 Collection Conveyor Belt 8A Collection Horizontal Part 8B Collection Vertical Part

Claims (2)

A lower horizontal part that transports horizontally at the lower position, an upper horizontal part that transports horizontally at the upper position, and a vertical part that transports vertically between the lower horizontal part and the upper horizontal part are formed as a continuous path. An inner conveyor belt, and an outer portion constructed along the conveying surface of the inner conveyor belt with a reciprocating path of the end positions of the lower horizontal portion and the upper horizontal portion centered on the vertical portion of the inner conveyor belt. A vertical conveyor comprising a conveyor belt,
In the return path immediately before the reversal position of the return path of the lower horizontal portion of the inner conveyor belt and the forward path, a vertical conveyance portion bent downward in a substantially vertical shape is formed,
Below the lower horizontal portion, at the lower position of the vertical portion, the upper ends are separated from each other so that the upper ends protrude from both width ends of the inner conveyor belt, and the lower ends are each the width dimension of the inner conveyor belt. While providing a pair of collecting plates arranged in an inclined manner so that the lower ends approach each other in the width center direction so as to fit in,
A recovery horizontal part that transports from the lower position of the vertical part to the front of the vertical transport part at a position below the lower ends of the paired recovery plates, and a recovery that transports the vertical part along the forward path of the horizontal part. A vertical conveyor comprising a collection conveyor belt having a continuous path with a vertical portion.   Instead of providing a recovery plate, the recovery conveyor belt is wider than the width of the inner conveyor belt, and in the recovery horizontal portion, it is inclined downward from both ends of the width toward the center of the width. The vertical conveyor according to claim 1.

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