WO2013161064A1

WO2013161064A1 - Manufacturing site for precast concrete article, conveyance system for precast concrete article, and conveyance system

Info

Publication number: WO2013161064A1
Application number: PCT/JP2012/061413
Authority: WO
Inventors: 光宏玉川; 耕一辻田; 勝弘増田
Original assignee: 前田建設工業株式会社; フジミ工研株式会社
Priority date: 2012-04-27
Filing date: 2012-04-27
Publication date: 2013-10-31

Abstract

The present invention is provided with: linear working yards which are provided inside a building, and in which at least one type of work from among rebar assembly, formwork assembly, concrete placing, and form removal is performed; linear stacking yards which are provided outside the building and parallel to the working yards, and in which precast concrete articles manufactured in the working yards are stacked; and conveyance channels which intersect central sections of the working yards and stacking yards, and through which the manufactured precast concrete articles are conveyed. The working yards are provided with: cranes provided inside the building which hoist rebars, formworks, and/or concrete; and rails along which the cranes travel. The stacking yards are provided with: cranes provided outside the building which hoist the precast concrete articles; and rails along which the cranes travel. The conveyance channels are provided with: conveyance devices for conveying the precast concrete articles; and rails along which the conveyance devices travel.

Description

Precast concrete product manufacturing plant, precast concrete product transfer system, and transfer system

The present invention relates to a precast concrete product manufacturing factory, a transport system, and a technology of a concrete transport system.

As a technology for transporting a precast concrete product, there is a technology using a dedicated cart or a dedicated transport device (see, for example, Patent Documents 1 and 2). Moreover, there exists a technique which conveys concrete using a rail (for example, refer patent document 3, 4).

JP 2009-121019 A JP-A-2005-207103 JP-A-10-217951 Japanese Patent Laid-Open No. 5-79189

Precast concrete is manufactured in the order of, for example, loading / cutting / assembling of reinforcing bars, formwork assembly, reinforcing bar cage, embedded hardware set, concrete placing, demolding, inspection / repair, stock, and shipping. Here, in the production of precast concrete, labor saving, logistics cost reduction, quality assurance, and the like are required. As a conventional technique, a technique for conveying concrete using a dedicated carriage or rail for conveying a precast concrete product is known. However, these conventional techniques are only intended to improve conveyance, and are not intended to improve the flow efficiency of the entire production of precast concrete products.

In view of the above problems, an object of the present invention is to provide a technique for improving the efficiency of the flow of the entire production of a precast concrete product.

In the present invention, in order to solve the above problems, materials and products are conveyed using rails and carts, and the installation position of the rails and the layout of the precast concrete product manufacturing factory are devised.

Specifically, the present invention is provided in a building, and includes a linear work yard that performs at least one of rebar assembly, formwork assembly, concrete placing, and demolding, and the outdoor building. A straight stock yard that stocks the precast concrete product manufactured in the work yard, and the work yard and the central portion of the stock yard are vertically cut and manufactured in the work yard. A transport path for transporting the precast concrete product, and the work yard includes a crane in the building that suspends at least one of the reinforcing bar, the formwork, and the concrete, and a crane in the building. A crane rail in a traveling building, and the stockyard is an outdoor building that suspends the precast concrete product. A lane and a rail of a crane outside the building on which the crane outside the building travels, and the transport path includes a transport device that transports the precast concrete product, and a rail of the transport device on which the transport device travels. It is a manufacturing plant for precast concrete products.

In the precast concrete product manufacturing factory according to the present invention, the work yard and the stock yard are formed in a straight line, and these are arranged in parallel so that the factory site can be used effectively. In addition, a transport path for transporting precast concrete products manufactured in the work yard is provided so as to traverse the center of the work yard and stock yard. The precast concrete product manufactured in the work yard is efficiently stored in the stock yard. Can be conveyed. The fact that the conveyance path cuts through the center of the work yard and the stock yard means that the work yard, the stock yard, and the conveyance path intersect at almost right angles. By setting the longitudinal position to the center, the precast concrete product can be more efficiently transported to the stock yard as compared to the case where the longitudinal section is the end. Moreover, in the precast concrete product manufacturing plant according to the present invention, rails are laid in each of the work yard, the stock yard, and the conveyance path, and a crane and a conveyance device travel on this rail. By transporting materials and products using rails, the transport route can be fixed, and work efficiency and safety can be improved.

Also, in the precast concrete product manufacturing plant according to the present invention, the top of the crane rail in the building and the top of the crane rail outside the building is lower than the top of the rail of the conveyor, At the intersection of the crane rail, the crane rail outside the building, and the rail of the transfer device, the rail of the transfer device is for passing the rail of the crane inside the building and the rail of the crane outside the building. The conveyor has a plurality of wheels in a direction in which the rail of the conveyor extends, and when traveling along the intersection, a predetermined number of wheels out of the plurality of wheels are You may make it contact | connect the rail of a conveying apparatus.

In the precast concrete product manufacturing plant according to the present invention, the rails of the crane inside the building, the rails of the crane outside the building, and the rails of the transfer device can be crossed. Therefore, the conveying apparatus can freely cut the work yard and the stock yard vertically. Moreover, the crane inside a building and the crane outside a building can cross a conveyance path freely. The number of wheels, the number of the predetermined number of wheels, the number of the precast concrete product transported by the transport device and the number of notches, the interval between the notches, the length of the notches, It can be designed to support precast concrete products when traveling. When the transport device passes through the intersection, the wheel located in the notch among the plurality of wheels does not contact the rail of the transport device, so that it floats in the air. Therefore, in the present invention, the number of the plurality of wheels and the predetermined number of wheels are designed so that the precast concrete product can be supported by wheels other than the wheels floating in the air.

Further, in the precast concrete product manufacturing plant according to the present invention, the plurality of wheels are arranged at equal intervals in a direction in which the rails of the conveying device extend, and the intervals between the plurality of wheels are conveyed by the conveying device. Based on the weight of the precast concrete product to be performed, the number of the cutout portions, the interval between the cutout portions, and the length of the cutout portions, the transport device is designed to support the precast concrete product when traveling the intersection. May be.

車輪 By making the wheels equidistant, the load on the wheels is evenly distributed when the transport device places precast concrete products. And by designing the distance between the wheels based on the weight of the precast concrete product and the length of the notch, the precast concrete product on which the transport device is placed is sufficiently supported when the transport device travels the intersection. be able to.

Here, the precast concrete product manufacturing plant according to the present invention is provided adjacent to the work yard, and temporarily places a material for manufacturing the precast concrete product, and processes the material in a straight line. It is good also as a structure further provided with a place and temporary storage place. Work efficiency can be further improved by providing a processing place and temporary storage place adjacent to the work yard.

Further, in the precast concrete product manufacturing plant according to the present invention, the work yard includes a carriage that transports at least one of the reinforcing bar, the formwork, and the concrete, and a rail of the carriage on which the carriage travels. It is good also as a structure which further has. In this way, by further providing the carriage and the rail of the carriage, the reinforcing bars, the formwork, and the concrete can be moved more efficiently in the work yard. As with the crane rail, the top end of the carriage rail may be lower than the top end of the rail of the transport device. In this case, the rail of the transport device can further be provided with a notch for passing the rail of the carriage. Thereby, a trolley can cross a conveyance way, and work efficiency improves more. The number of wheels, the number of the predetermined number of wheels, the number of the precast concrete product transported by the transport device and the number of notches, the interval between the notches, the length of the notches, It can be designed to support precast concrete products when traveling.

Here, the precast concrete product manufacturing plant according to the present invention includes a batcher plant that manufactures concrete, a concrete transport cart that transports the concrete manufactured in the batcher plant, and the concrete transport cart. An elevated rail that travels and is laid at a position higher than the ground surface of the precast concrete product manufacturing plant, and the concrete that is movable below the elevated rail and that is conveyed by the concrete carriage is constructed in the building. A carriage for transporting to the building for further transporting indoors, and rails for the transport cart for moving to the building where the transport cart for moving to the building travels. The transporting carriage is a plurality of transporting carts that contain concrete transported by the concrete transporting carriage. A carriage with a bucket, which has a plurality of carriages with buckets that are movable independently of each other, and a base carriage that is movable by placing the plurality of carriages with buckets, and moves into the building. The rail of the bogie is a rail of the base bogie on which the base bogie travels, and an adjustment rail for adjusting the position of a bucket that is a destination of the concrete transported by the bogie for concrete transport, A rail for a carriage with a bucket that is orthogonal to the rail for adjustment and is laid at a position higher than the rail for adjustment, and extends to the building and travels by the plurality of carriages with buckets. Also good.

According to the precast concrete product manufacturing factory according to the present invention, the concrete (fresh concrete) manufactured in the batcher plant can be efficiently transported into the building. In particular, in the present invention, by providing a plurality of carts with buckets, more concrete can be conveyed at a time. The cart with a bucket can be loaded with a bucket, and the bucket and the cart can be separated. Further, since the plurality of carriages with buckets are independent from each other, the transport destination of the carriage with buckets can be distinguished. Moreover, the position of the trolley | bogie with a bucket used as the accommodation place of concrete can be adjusted by providing the rail for adjustment. That is, by moving a base carriage on which a plurality of carriages with buckets are placed below the concrete carriage and dropping concrete, the concrete can be accommodated in any bucket carriage. When the first trolley with a bucket is full, the base trolley is moved, and the concrete is accommodated in the next arbitrary trolley with a bucket. And if the cart with the bucket accommodates concrete, the cart with the bucket to be moved is first moved into the building by matching the position of the cart with the bucket to be moved with the base end of the rail of the cart with the bucket Can do. After that, by aligning the position of the carriage with the bucket to be moved next with the rail for the carriage with the bucket at the base end, the carriage with the bucket to be moved next can be moved into the building. The rail of the carriage with a bucket may be laid separately from a rail going from the building outside to the building inside and a return rail from the building inside to the building outside. Thereby, the cart with a bucket can be moved more smoothly.

In addition, this invention can also be specified as a concrete conveyance system containing the trolley | bogie for conveyance and the rail of the trolley | bogie for conveyance which moves to a building. The concrete transport system may include a concrete transport cart and an elevated rail.

Here, the present invention can also be specified as a transport system for precast concrete products. That is, the present invention includes a transport device that transports precast concrete, and a rail of the transport device on which the transport device travels, and the rail of the transport device intersects with another rail, and the top of the other rail. The end is lower than the top end of the rail of the transfer device, and at the intersection of the other rail and the rail of the transfer device, the rail of the transfer device has a notch for passing the other rail. And the transport device has a plurality of wheels in a direction in which a rail of the transport device extends, and when traveling the intersection, a predetermined number of wheels of the plurality of wheels are It is a transport system for precast concrete products in contact with rails.

Further, the plurality of wheels are arranged at equal intervals in a direction in which the rail of the transfer device extends, and the interval between the plurality of wheels is the weight of the precast concrete conveyed by the transfer device and the number of the notches. You may design based on the space | interval of the said notch parts, and the length of the said notch part so that a precast concrete product can be supported when the said conveying apparatus drive | works the said intersection part.

The present invention can also be specified as a transport system. That is, the precast concrete product conveyance system described above can also be specified as a technique for conveying articles other than the precast concrete product. For example, the present invention includes a transport device that transports a predetermined article, and a rail of the transport device on which the transport device travels. The rail of the transport device intersects with another rail, and the rail of the other rail The top end is lower than the top end of the rail of the transfer device, and at the intersection of the other rail and the rail of the transfer device, the rail of the transfer device passes through the other rail. The transport device has a plurality of wheels in a direction in which a rail of the transport device extends, and when traveling on the intersection, a predetermined number of wheels among the plurality of wheels are the transport device. This is a transport system that contacts the rails of

Further, the plurality of wheels are arranged at equal intervals in a direction in which the rail of the transport device extends, and the interval between the plurality of wheels is determined by the weight of a predetermined article transported by the transport device and the number of the notches. Based on the distance between the cutout portions and the length of the cutout portions, it may be designed so that a predetermined article can be supported when the transport device travels the crossing portion.

According to the present invention, it is possible to provide a technique for improving the efficiency of the flow of the entire production of a precast concrete product.

The top view of the manufacturing factory of the precast concrete product concerning an embodiment is shown. Sectional drawing of the building of the manufacturing plant of the precast concrete product which concerns on embodiment is shown. The enlarged plan view of the work yard concerning an embodiment is shown. The top view of the laying condition of the rail of the manufacturing plant of the precast concrete product which concerns on embodiment is shown. The side view of the conveying apparatus which concerns on embodiment is shown. The top view of the conveyance device concerning an embodiment is shown. The rear view of the conveying apparatus which concerns on embodiment is shown. The perspective view of a mode that the conveying apparatus which concerns on embodiment cuts a work yard vertically is shown. The top view of the intersection of a work yard and a conveyance way concerning an embodiment is shown. Sectional drawing of the cross | intersection part of a work yard and a conveyance path based on embodiment is shown. A mode that a conveyance device concerning an embodiment cuts a work yard vertically is shown in steps. The enlarged plan view near the concrete conveyance system concerning an embodiment is shown. The schematic block diagram of the concrete conveyance system which concerns on embodiment is shown. The manufacturing process of the precast concrete product which concerns on embodiment is shown. In the top view of the precast concrete product manufacturing factory which concerns on embodiment, the import destinations, such as a reinforcing bar, are shown. In the top view of the manufacturing plant of the precast concrete which concerns on embodiment, the flow of a precast concrete product is shown.

Next, an embodiment of the present invention will be described based on the drawings. However, the embodiment described below is an example for carrying out the present invention, and the present invention is not limited to the mode described below.

<Layout of precast concrete product manufacturing plant>
FIG. 1 is a plan view of a precast concrete product manufacturing plant according to an embodiment (hereinafter, a precast concrete product is also referred to as a PC concrete product, and a precast concrete product manufacturing plant is also simply referred to as a manufacturing plant). In the manufacturing factory 1 according to the embodiment, a main passage 2 is provided so as to cross the center. One end (lower side) of the main passage 2 is provided with a main entrance / exit of a transport vehicle that transports the PC concrete product manufactured in the manufacturing factory 1, and the other end (upper side) of the main passage 2 is provided with a transport vehicle. Sub entrances are provided. The manufacturing factory 1 according to the embodiment includes a first factory 1A in the left area and a second factory 1B in the right area, with the main passage 2 as a boundary. The first factory 1A and the second factory 1B are each provided with a work yard 3, a stock yard S, a conveyance path 4, and the like. The functions of the first factory 1A and the second factory 1B are basically the same. Hereinafter, the first factory 1A will be mainly described. The PC concrete product manufactured at the manufacturing factory 1 is exemplified by columns, beams, floors, outer walls, balconies, and internal stairs.

<< work yard >>
The work yard 3 is linearly provided in the vicinity of the center of the first factory 1A so as to cross the first factory 1A. As shown in FIG. 2, the work yard 3 is provided in the building, and the work yard 3 performs at least one of the following operations: rebar assembly, formwork assembly, concrete placement, and demolding. Can do. Reinforcement assembly includes rebar cutting and rebar processing. At both ends in the longitudinal direction of the work yard 3, a reinforcing bar processing field R is provided as a region for particularly processing the reinforcing bars. Further, in the work yard 3, in addition to the above, a reinforcing bar can be set. In other words, the work yard 3 can perform all of the work necessary for manufacturing the PC concrete product. The inspection and repair of the PC concrete product can be performed in the inspection / repair yard I described later, but the PC yard product may be inspected and repaired in the work yard 3.

The work yard 3 according to the embodiment is composed of 8 lines as shown in FIG. 3 (indicated by circled numbers 1 to 8 in FIG. 3). Specifically, the manufacturing factory 1 employs a cell profit method, and the work yard is divided into eight lines. The cell profit method is a method in which a manufacturing process is completed by a small number of workers (multi-skilled workers) team. A multi-skilled worker is an operator who performs a plurality of types of work by one person. As shown in FIG. 3, in each of the first factory 1 </ b> A and the second factory 1 </ b> B, the work yard 3 is divided into two parts in the longitudinal direction and divided into four parts in the width direction, so that the total number is divided into eight parts. One line is handled by one team, and a surface plate 5 (also referred to as a bed) on which a formwork or the like is placed is provided on one line. That is, in the manufacturing factory 1, the same work yard 3 is also provided in the second factory 1B, and the total number of the surface plates 5 is 12 beds × 8 lines × 2 = 192 beds. In addition, the number of lines and the number of beds are examples, and are not limited to these.

As shown in FIG. 4, the work yard 3 is further provided with a carriage 6, and a carriage rail 7 on which the carriage 6 travels is laid. The work yard 3 is provided with a portal crane 8 in the building, and a rail 9 of the portal crane in the building is laid. The cart 6 is movable between lines adjacent to each other in the longitudinal direction of the work yard 3 in the work yard 3, and conveys reinforcing bars, formwork, concrete, and the like. For example, the carts 6 of the lines (1) and (2) are movable in the range of the lines (1) and (2) (see FIG. 3). A carriage rail 7 for running the carriage 6 is laid along the longitudinal direction of the work yard 3 at the center of the lines (1) and (2). The gate-type crane 8 in the building has a wider movement range than the carriage 6 and can move between the adjacent lines in the longitudinal direction of the work yard 3 across the transport path 4 in the work yard 3. The portal crane 8 in the building can hang reinforcing bars, formwork, concrete and the like. For example, the portal crane 8 in the building of the lines (1), (2), (5), (6) is movable within the range of the lines (1), (2), (5), (6). Yes (see FIG. 3). Rails 9 of the gate crane in the building for running the gate crane 8 in the building are in the longitudinal direction of the building at both ends in the width direction of lines (1), (2), (5), (6). Is laid along. The rail 7 of the carriage may also cross the conveyance path 4 in the same manner as the rail 9 of the portal crane in the building.

The processing place / temporary storage place M is linearly provided along the work yard 3 on both sides in the width direction of the work yard 3. In the processing place / temporary storage place M, the material of the PC concrete product is temporarily placed and the material is processed. Materials include reinforcing bars, formwork, embedded hardware, wire numbers, spacers, and the like. As shown in FIGS. 1 and 2, the processing place / temporary storage place M is provided in the building. Note that the roof of the processing and temporary storage area M is lower than the roof of the work yard 3.

<< Stockyard >>
The stock yard S is provided in a straight line parallel to the work yard 3 outside the building, and is manufactured in the work yard 3 and inspected PC concrete products are stocked until shipment. The stock yards S are provided in two rows above the work yard 3 and in three rows below the work yard 3. In the PC concrete manufacturing factory 1 according to the embodiment, in order to use the space below the first factory 1A, three rows of stock yards S are provided below the work yard 3, but in the second factory 1B, Two stock yards S are provided below the work yard 3. The length of the stock yard S located at the lowermost side of the first factory 1A is approximately half of the length of the other stock yards S because of the site.

As shown in FIG. 4, the stock yard S is provided with a gate-type crane 22 outside the building, and a rail 23 of the gate-type crane outside the building is laid. The portal crane 22 outside the building can traverse the conveyance path 4 in the same manner as the portal crane 8 inside the building. The portal crane 22 outside the building can suspend PC concrete products. Rails 23 of the outdoor gate crane for running the outdoor gate crane 22 are laid along the longitudinal direction of each row of the stockyard.

<< Conveyance path >>
The conveyance path 4 is provided so as to cut through the center of the work yard 3 and the stock yard S. In other words, the conveyance path 4 is provided in the center part of the work yard 3 and the stock yard S so as to be orthogonal thereto. In the conveyance path 4, a conveyance device 10 and a rail 11 of the conveyance device are provided. The conveyance device 10 can freely cut the work yard 3 and the stock yard S, and can convey the PC concrete product manufactured in the work yard 3 to the stock yard S. The rail 11 of the transport device is laid along the longitudinal direction of the transport path 4. The details of the transfer device 10 will be described later.

<< Inspection / Repair Yard >>
The inspection / repair yard I is provided at the intersection of the stock yard S and the conveyance path 4. In the inspection / repair yard I, the PC concrete product manufactured in the work yard 3 is inspected. In addition, in the inspection / repair yard I, in addition to the inspection, the PC concrete product that is determined to be repaired in the inspection is repaired.

<< Aggregate entrance >>
The aggregate receiving port A is provided adjacent to the work yard 3 of the first factory 1A and on the main passage 2 side. In the aggregate receiving port A, various aggregates constituting the PC concrete carried in via the main passage 2 are classified for each type and temporarily placed. Examples of the various aggregates include fine aggregates and coarse aggregates. In this embodiment, the aggregate receiving port A is shared by the first factory 1A and the second factory 1B, but an aggregate receiving port may be installed in each of the first factory 1A and the second factory 1B. .

<< Batcher Plant >>
The batcher plant F is provided in the vicinity of the aggregate receiving port A and on the upper side of the work yard 3. Further, in the vicinity of the batcher plant F, there are a plurality of tanks for storing water and admixtures, a cement silo, a boiler B for generating steam for steam curing, a compressor K used for batcher plant facilities, and the like. Facilities are provided. Batcher plant F mixes the aggregate transported from the aggregate receiving port A via the belt conveyor with water, admixture and cement transported from the tank or cement silo, and puts the concrete (fresh concrete). To manufacture.

<< Remaining waste treatment plant >>
As shown in FIG. 1, the remaining-con processing plant C is provided at the end of the stock yard S located on the uppermost side in the drawing, and concrete or the like to be discarded is temporarily placed.

<< Wastewater treatment plant >>
As shown in FIG. 1, the waste water treatment plant W is provided at an end of the stock yard S adjacent to the upper side of the work yard 3 on the drawing, and processes waste water discharged from the manufacturing factory 1.

<< Centralized management room >>
The central control room X is provided near the center of the manufacturing plant 1 and performs quality control, shipment management, etc. of PC concrete. Specifically, the central control room X is provided with a batcher operation room for controlling the batcher plant F, a fresh concrete test room, a concrete compressive strength test room, and a trial kneading room. In the batcher operation room, a computer and a control panel including a CPU (Central Processing Unit), a memory, an operation unit, and a display unit are provided, and mix management of the concrete manufactured in the Batcher Plant F is performed. In the batcher operation room, it is also possible to manage aggregates conveyed from the aggregate receiving port A to the batcher plant F. Moreover, the conveyance management of the concrete conveyance system mentioned later is also possible. In the fresh concrete test room, a curing water tank for a specimen for compressive strength management is provided, and concrete is cured. In the concrete compressive strength test room, various testing machines are provided to perform a compressive strength test of concrete. The concrete compressive strength test room is provided with a steam curing room and a constant temperature and humidity room, and is capable of curing concrete under steam curing and constant temperature and humidity. In the trial kneading room, a mixer for trial kneading is provided, and concrete trial kneading is performed.

<PC concrete conveyance system>
As shown in FIGS. 4 to 12, the PC concrete conveyance system includes a conveyance device 10 and rails 11 of the conveyance device, and conveys the PC concrete product manufactured in the work yard 3 to the stock yard S. FIG. 4: shows the top view of the laying condition of the rail of the manufacturing factory of the precast concrete product which concerns on embodiment. FIG. 5 is a side view of the transport device according to the embodiment. FIG. 6 is a top view of the transport device according to the embodiment. FIG. 7 is a rear view of the transport device according to the embodiment. FIG. 8 is a perspective view of a state in which the transport device according to the embodiment cuts the work yard vertically. FIG. 9 is a plan view of the intersection between the work yard and the conveyance path according to the embodiment. FIG. 10 is a cross-sectional view of the intersection between the work yard and the conveyance path according to the embodiment. FIG. 11 shows the state in which the transport device according to the embodiment traverses the work yard step by step. FIG. 12 is an enlarged plan view of the vicinity of the concrete conveyance system according to the embodiment. The conveyance device 10 according to the embodiment mainly includes a pedestal 101, wheels 102, a motor 103, a storage battery 104, a speed reducer 105, an operation panel 106, and a bumper 107.

The pedestal 101 has a rectangular shape in plan view, on which the PC concrete product manufactured in the work yard 3 is placed. The dimensions of the base 101 can be appropriately designed according to the PC concrete product to be placed.

A plurality of wheels 102 are provided below the pedestal 101 and rotate along the rails 11 of the transfer device. In the present embodiment, six pairs of left and right wheels 102 (hereinafter simply referred to as wheels) are provided at equal intervals in the longitudinal direction of the work yard 3. The total number of wheels 102 and the distance between the wheels 102 are designed based on the weight of the PC concrete product placed on the pedestal 101, the distance between the notches 12 of the rail 11 of the conveying device, and the length of the notches 12. The notch 12 is a part of the rail 11 of the transport device that is notched so that the rail 8 of the portal crane inside the building or the rail 23 of the portal crane outside the building is passed.

Here, as shown in FIGS. 5 and 8 to 10, at the intersection of the work yard 3 and the conveyance path 4, a notch 12 is provided in the rail 11 of the conveyance device laid on the conveyance path 4. . The length of the notch 12 corresponds to the width of the groove 13 for laying the rail 9 of the portal crane in the building (see particularly FIGS. 5 and 8). The top end of the rail 9 of the portal crane in the building is lower than the top end of the rail 11 of the transport device. Therefore, when the transport device 10 passes through the intersection of the work yard 3 and the transport path 4, the wheel 102 located in the notch 12 out of the six wheels 102 does not contact the rail 11 of the transport device. , Floats in the air. The structure of the intersection between the stock yard S and the conveyance path 4 is the same.

As shown in FIG. 11, when the conveyance device 10 according to the embodiment cuts the work yard 3 vertically, the four or more wheels 102 out of the six wheels 102 are always in contact with the rail 11 of the conveyance device. The total number of 102 and the distance between the wheels 102 are designed. Thereby, even when the two wheels 102 are positioned on the notch 12 and are floating in the air, the weight of the PC concrete placed on the pedestal 101 can be distributed to the four wheels 102. The same applies to the case where the transport device 10 traverses the stockyard S.

The motor 103 is stored in front of the carriage 6 and drives the wheels 102 via a speed reducer 105 including a gear, a drive belt, and the like. The motor 103 has an electromagnetic brake. The storage battery 104 is stored behind the pedestal 101 and supplies power to the motor 103. The operation panel 106 is provided at the rearmost part of the pedestal 101, receives an operator instruction, and controls the traveling state of the transport device 10. The bumper 107 is provided in the foremost part and the rearmost part of the transport apparatus 10 and absorbs an impact when it comes into contact with an obstacle.

In addition to the above, the transport device 10 according to the embodiment is provided on both front sides of the pedestal 101, provided with an emergency stop button 108 for emergency stop of the transport device 10, and near the center of the pedestal 101. A melody horn (not shown) that outputs a sound indicating the running state of the vehicle, and a rotating lamp 109 that is provided on the frame of the deck on which the operation panel 106 is installed, and that informs that it is running when the transport device 10 is running. Is provided.

<Concrete transport system>
As shown in FIGS. 12 and 13, the concrete transport system includes a concrete transport carriage 14, an elevated rail 15, a transport carriage 16 that moves into a building, an adjustment rail 17, and a carriage with a bucket. The concrete (fresh concrete) including the rail 18 and manufactured by the batcher plant F is conveyed into the building. FIG. 13: shows the schematic block diagram of the concrete conveyance system which concerns on embodiment.

Concrete carriage 14 runs on elevated rail 15 and conveys the concrete manufactured in Batcher Plant F to the vicinity of the building. The elevated rail 15 is laid at a position higher than the ground surface of the manufacturing factory 1 from the batcher plant F to the vicinity of the building.

The transporting carriage 16 that moves into the building is movable below the elevated rail 15 and transports the concrete transported by the concrete transporting carriage 14 into the building. The carriage 16 that moves into the building is placed in the longitudinal direction of the building by placing three carriages 19 with buckets 19 that contain the concrete conveyed by the carriage 14 for concrete conveyance and three carriages 19 with buckets. A movable base carriage 20 is provided. The three carriages 19 with buckets are independent from each other and are movable in a direction orthogonal to the longitudinal direction of the building. The three bucket-equipped carts 19 are arranged along the longitudinal direction of the building and travel on the adjustment rail 17.

The adjustment rail 17 is laid parallel to the longitudinal direction of the building. Therefore, it is possible to adjust the position of the carriage 19 with a bucket that is a concrete accommodation destination. That is, the base carriage 20 on which the three carriages 19 with buckets are placed is moved below the carriage 14 for transporting concrete, and the concrete is dropped, whereby concrete can be accommodated in the carriages 19 with buckets. . When the first cart 19 with a bucket is full, the base cart 20 can be moved to accommodate the concrete in the next arbitrary cart 19 with a bucket. The length of the adjustment rail 17 is only required to be able to adjust the position of the carriage 19 with a bucket, and may be about twice that of the base carriage 20.

The rail 18 of the carriage with the bucket extends from the adjustment rail 17 into the building and is laid so as to cut the work yard 3 vertically. Therefore, the carriage-equipped bucket 19 accommodating the concrete can be moved to the work yard 3 in the building. In FIG. 13, the rail 18 of the carriage with the bucket is laid separately from a going-out rail 18 a from the building to the building and a return rail 18 b from the building to the building. Thereby, the cart 19 with a bucket can be moved more smoothly. The going rail 18a and the return rail 18b may be connected by a U-shaped rail. Thereby, the cart 19 with a bucket can be circulated. Here, the rail 17 for adjustment is laid so that the top end thereof is lower than the top end of the rail 18 of the carriage with bucket. More specifically, the adjustment rail 17 is laid so that the top surface of the base carriage 20 is substantially the same height as the top end of the rail 18 of the bucket carriage. The base carriage 20 is provided with three pairs (six) of rails 21 having the same width as the rails 18 of the carriage with buckets in the same direction as the rails 18 of the carriage with buckets. Thereby, the carriage 21 with the bucket can be easily moved to the work yard 3 in the building by matching the rail 21 on the base carriage on which the carriage 19 with the bucket to be transported is placed with the rail 18 of the carriage with the bucket. Can be moved to.

The intersection of the rail 18 of the carriage with the bucket, the rail 9 of the portal crane in the building laid in the work yard 3 and the rail 7 of the carriage is the rail 11 of the transfer device described above and the building. It can be configured in the same manner as the intersection with the portal crane 8. For example, the rail 18 of the carriage with the bucket is provided with a notch for passing the rail 9 of the portal crane in the building laid in the work yard 3 and the rail 7 of the carriage, A plurality of wheels and wheels of the carriage 6 can be provided so as to withstand the load when passing through the intersection. In addition, a notch portion for passing the rail 18 of the carriage with the bucket is provided in the rail 9 of the portal crane and the rail 7 of the carriage installed in the work yard 3, and the wheels of the carriage 19 with the bucket are crossed. A plurality can be provided to withstand the load when passing through the section. When the concrete transported to the work yard 3 by the cart 19 with the bucket is further transported along the work yard 3, the bucket of the cart 19 with the bucket is lifted by the portal crane 8 in the building, and along the work yard 3. What is necessary is just to transship to the cart 6 which can move freely.

<Manufacturing process of PC concrete>
FIG. 14 shows a manufacturing process of the PC concrete product according to the embodiment. First, a production drawing of the PC concrete product to be manufactured is created and approved by the customer. When customer approval is obtained, reinforcing bars, mesh bars, advanced parts (formwork, metal fittings, etc.), concrete materials (aggregates, cement, admixtures, etc.) are carried in and inspected. If the inspection is passed, the rebar will be processed.

Here, FIG. 15 is a plan view of the PC concrete product manufacturing plant according to the embodiment, and shows the destinations of the reinforcing bars and the like. As shown in FIG. 15, the reinforcing bars are mainly carried into the reinforcing bar processing field R, and after being processed at the reinforcing bar processing field R, the reinforcing bars are moved to the work yard 3. For the movement of the reinforcing bars, the portal crane 8 and the carriage 6 in the building are appropriately used. Concrete is carried into the work yard 3 from the batcher plant F by a concrete transport system. Concrete can be carried into the work yard located away from the batcher plant F after being loaded into the work yard 3 by the concrete transport system, transferred to the cart 6 by the portal crane 8 in the building, and carried out by the cart 6. it can. Advance parts such as molds and metal fittings are temporarily placed in a processing place / temporary place M adjacent to the work yard 3.

When customer approval of the production drawing is obtained, a production plan is further created, and then a formwork is created. The formwork can be created outside the manufacturing factory, and when the formwork created outside is carried in, an acceptance inspection is performed. When the created formwork is carried into the work yard 3, formwork cleaning is performed, and then the formwork is assembled. Once the formwork is assembled, a formwork inspection is performed. If the form inspection is passed, the leading parts are set. Next, a release agent is applied to the surface of the formwork, and mesh lines are set. When mesh bars are set, inspections for reinforcing bars and formwork are performed.

On the other hand, for concrete materials, after acceptance inspection, further material inspection is performed, and concrete is manufactured at Batcher Plant F based on the formulation according to the design. The manufactured concrete is subjected to a concrete inspection, and if the inspection passes, a specimen is collected. Subsequently, concrete is poured into the formwork that has undergone the pre-inspection, and the concrete is driven in.

Next, the surface of the poured concrete is finished, and then steam curing is performed. Ordinary curing may be performed instead of steam curing. When curing is performed, a demolding strength test is performed, and when the test is passed, demolding is performed.

When the mold is removed, the PC concrete product is transferred from the work yard 3 to the stock yard S. Here, FIG. 16 shows a flow of the PC concrete product in the plan view of the PC concrete product manufacturing factory according to the embodiment. Specifically, the demolded PC concrete product is transported to the transport path 4 using the portal crane 8 and the carriage 6 in the building, and placed on the base 101 of the transport apparatus 10 waiting on the transport path 4. Is done. In addition, since a conveyance vehicle can be put on both ends of the stock yard S, the moving distance of the portal crane 22 outside a building can be minimized. Next, the PC concrete product is transported to the inspection / repair yard I, where marking is performed to give an identification number, and then product inspection is performed.

When the product inspection is passed, the PC concrete product that has passed the inspection is transported to the stock yard S using the portal crane 22 outside the building. If the product inspection is not passed, the repair is performed. When the product inspection is finally passed, the PC concrete product that has passed the inspection is transported to the stock yard S using the portal crane 22 outside the building. The

The PC concrete products stocked in the stockyard S are then subjected to a final inspection prior to shipment, and are loaded onto the transport vehicle using the portal crane 22 outside the building or the crane of the transport vehicle and shipped (transported). .

<Effect>
In the PC concrete manufacturing factory 1 according to the embodiment, the work yard 3 and the stock yard S are linear, and these are arranged in parallel, so that the site of the PC concrete manufacturing factory 1 can be used effectively. Moreover, the conveyance path 4 is provided so that the center part of the work yard 3 and the stock yard S may be cut, and the PC concrete product manufactured by the work yard 3 can be efficiently conveyed to the stock yard S. By using the longitudinal position as the central portion, the PC concrete product can be conveyed to the stock yard S more efficiently than in the case where the longitudinal portion is the end. Further, in the PC concrete manufacturing factory 1, rails are attached to the work yard 3, the stock yard S, and the conveyance path 4, and the gate crane and the conveyance device 10 travel on the rails. By transporting materials and PC concrete products using rails, the transport route can be fixed, and work efficiency and safety can be improved. In addition, a work place / temporary storage place M is provided adjacent to the work yard 3, and work efficiency can be further improved.

Moreover, in the PC concrete manufacturing factory 1, the rail 9 of the portal crane inside the building, the rail 23 of the portal crane outside the building, and the rail 11 of the conveyor cross, and the conveyor is the work yard 3 and the stock yard. S can be cut freely. The portal crane 8 inside the building and the portal crane 22 outside the building can freely traverse the conveyance path 4. Therefore, work efficiency can be improved. In addition, the number of wheels 102 of the transfer device 10 (6 in this embodiment), the number of wheels 102 always in contact with the rail (4 in this embodiment), and the distance between the wheels 102 are the PCs that the transfer device 10 conveys. Based on the weight of the concrete product, the number of the notches 12, the interval between the notches 12, and the length of the notches 12, it is designed to support the PC concrete when the transport device 10 travels the intersection. Therefore, when the conveying device 10 passes through the intersection, even if the wheel 102 located in the notch 12 among the plurality of wheels 102 floats in the air, the conveying device 10 can use the PC concrete product without any problem. Can be transported.

Moreover, according to the PC concrete manufacturing factory 1 which concerns on embodiment, the concrete (fresh concrete) manufactured by the batcher plant F can be efficiently conveyed in a building. In particular, more concrete can be conveyed at a time by providing the three carts 19 with buckets. Moreover, since the three carts 19 with a bucket are mutually independent, the conveyance destination of a cart with a bucket can be distinguished. Moreover, by providing the adjustment rail 17, the position of the cart 6 with a bucket as a concrete accommodation destination can be adjusted. That is, the base carriage 20 on which the three carriages 19 with buckets are placed is moved below the concrete carriage 14 to drop the concrete, whereby concrete can be accommodated in the arbitrary carriages 19 with buckets. . When the first cart 19 with a bucket is full, the base cart 20 is moved, and concrete is accommodated in the next arbitrary cart 19 with a bucket. And if the trolley 19 with a bucket accommodates concrete, the position of the trolley 19 with a bucket used as a movement object will be matched with the rail 18 of the trolley with a bucket, and the trolley 19 with a bucket used as a movement object will be moved to a building first. be able to. Thereafter, the position of the carriage 19 with a bucket to be moved next is matched with the rail 18 of the carriage with a bucket, whereby the carriage 19 with a bucket to be moved next can be moved into the building.

In addition, by installing the batcher plant F in each of the first factory 1A and the second factory 1B, it is possible to shorten the concrete supply distance and to eliminate waiting time when ordering is concentrated. In addition, by adopting a so-called cell production method, an operator is fixed and variation in quality can be suppressed. In addition, an inspection / repair yard is provided, and the outflow of nonconforming products or rejected products to the stockyard S can be suppressed.

Also, the quality of concrete (fresh concrete) can be improved by reducing the concrete supply distance. In addition, the central control room X can centrally perform quality control and shipment management of PC concrete products, thereby realizing prompt feedback on the quality of PC concrete products and reduction of workers.

The preferred embodiments of the present invention have been described above. However, the PC concrete product manufacturing plant, the precast concrete transport system, and the transport system according to the present invention are not limited to these, and can include combinations thereof as much as possible. .

DESCRIPTION OF SYMBOLS 1 ... PC concrete product manufacturing factory 1A ... 1st factory 1B ... 2nd factory 2 ... Main passage 3 ... Work yard 4 ... Conveyance path 5 ... Surface plate 6 ... -Carriage 7 ... Carriage rail 8 ... Gate crane 9 in the building 9 ... Rail 10 of the gate crane in the building 10 ... Transfer device 11 ... Rail 12 of the transfer device ... Notch Part 13: Groove 14 ... Concrete carriage 15 ... Elevated rail 16 ... Transport carriage 17 moving to the building 17 ... Adjustment rail 18 ... Bucket carriage rail DESCRIPTION OF SYMBOLS 19 ... Cart with bucket 20 ... Base carriage 21 ... Rail 22 ... Gate crane outside building 23 ... Rail 101 of gate crane outside building ... Pedestal 102 ... Wheel 103 ... Motor 104 ... Storage battery 105 ... Speed reducer 06 ... Control panel 107 ... Bumper A ... Aggregate receiving port F ... Batcher plant I ... Inspection / repair yard M ... Processing / temporary storage place R ... Rebar processing site S ... Stockyard X ... Centralized management room

Claims

A linear work yard that is provided in the building and performs at least any one of rebar assembly, formwork assembly, concrete placing, and demolding;
A straight stock yard that is provided outside the building in parallel with the work yard and stocks precast concrete products manufactured in the work yard;
A center of the work yard and the stock yard, and a conveyance path for conveying a precast concrete product manufactured in the work yard,
The work yard includes a crane in a building that suspends at least one of the reinforcing bar, the formwork, and the concrete, and a rail of a crane in the building in which the crane in the building travels.
The stock yard has an outdoor crane for hanging the precast concrete product, and an outdoor crane rail on which the outdoor crane travels.
The transport path includes a transport device that transports the precast concrete product, and a rail of the transport device on which the transport device travels.
Manufacturing plant for precast concrete products.
The ceiling of the crane rail in the building and the rail of the crane outside the building is lower than the ceiling of the rail of the transport device,
At the intersection of the rail of the crane in the building, the rail of the crane outside the building, and the rail of the transport device, the rail of the transport device is the rail of the crane in the building and the rail of the crane outside the building. A notch for passing through,
The transport device has a plurality of wheels in a direction in which the rail of the transport device extends, and when traveling on the intersection, a predetermined number of the wheels contact the rail of the transport device. ,
A manufacturing plant for the precast concrete product according to claim 1.
The plurality of wheels are arranged at equal intervals in a direction in which the rails of the conveying device extend, and the intervals between the plurality of wheels are the weight of the precast concrete product conveyed by the conveying device, the number of the notches, and the Based on the interval between the notches and the length of the notches, the conveyor is designed to support precast concrete products when traveling the intersection.
A factory for producing the precast concrete product according to claim 2.
Any one of Claim 1 to 3 further provided with the linear processing place and temporary storage place which is provided adjacent to the said work yard, and temporarily arrange | positions the material for manufacturing a precast concrete product, and processes the said material. A manufacturing plant for the precast concrete product according to item 1.
The work yard further includes a carriage that transports at least one of the reinforcing bar, the formwork, and the concrete, and a rail of the carriage on which the carriage travels.
The precast concrete product manufacturing plant according to any one of claims 1 to 4.
A batcher plant for producing concrete,
A concrete transport cart for transporting the concrete produced in the batcher plant;
The concrete transport cart travels, and an elevated rail laid at a position higher than the ground surface of the precast concrete product manufacturing plant;
A transport carriage that is movable below the elevated rail and moves to a building that further transports concrete transported by the concrete transport cart to the building;
A rail of a carriage for transportation moving to the building where the carriage for transportation moving to the building travels,
The carriage for moving to the building is a plurality of bucket-equipped carriages that contain the concrete conveyed by the concrete carriage, and a plurality of bucket-equipped carriages that are movable independently of each other, A base carriage that is movable by placing a plurality of carriages with buckets;
The rail of the carriage for transportation that moves into the building is the rail of the base carriage that the base carriage travels, and adjusts the position of the bucket that is the accommodation destination of the concrete that is conveyed by the concrete carriage. Rail for adjustment, and a carriage with bucket that is orthogonal to the adjustment rail and is laid at a position higher than the adjustment rail, and extends to the building and travels with the plurality of bucket carriages With rails,
The manufacturing plant of the precast concrete product of any one of Claim 1 to 5.
A transport device for transporting precast concrete products;
A rail of a transport device on which the transport device travels,
The rail of the transfer device intersects with another rail, the top end of the other rail is lower than the top end of the rail of the transfer device,
At the intersection of the other rail and the rail of the transport device, the rail of the transport device has a notch for passing the other rail,
The transport device has a plurality of wheels in a direction in which the rail of the transport device extends, and when traveling on the intersection, a predetermined number of the wheels contact the rail of the transport device. , Transport system for precast concrete products.
The plurality of wheels are arranged at equal intervals in a direction in which the rails of the conveying device extend, and the intervals between the plurality of wheels are the weight of the precast concrete product conveyed by the conveying device, the number of the notches, and the Based on the interval between the notches and the length of the notches, the conveyor is designed to support precast concrete products when traveling the intersection.
The conveyance system of the precast concrete product of Claim 7.
A transport device for transporting a predetermined article;
A rail of a transport device on which the transport device travels,
The rail of the transfer device intersects with another rail, the top end of the other rail is lower than the top end of the rail of the transfer device,
At the intersection of the other rail and the rail of the transport device, the rail of the transport device has a notch for passing the other rail,
The transport device has a plurality of wheels in a direction in which the rail of the transport device extends, and when traveling on the intersection, a predetermined number of the wheels contact the rail of the transport device. , Transport system.
The plurality of wheels are arranged at equal intervals in a direction in which the rails of the transfer device extend, and the intervals between the plurality of wheels include the weight of a predetermined article conveyed by the transfer device, the number of the notches, and the Based on the interval between the notches and the length of the notches, the conveyor is designed to support a predetermined article when traveling on the intersection.
The transport system according to claim 9.