JP2009202691A - Conveying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveying apparatus capable of reducing the construction cost of a building and of reducing the cost of installation work and maintenance work. <P>SOLUTION: The conveying apparatus has a hoist work line HL on the way of a path for conveying an object W to be conveyed on a truck 2 with a floor conveyer 1. On the hoist work line HL, the object W to be conveyed on a truck 2 is replaced to a carrier 11 for work. The carrier 11 is provided with a pair of right and left frame bodies 12 and a receiving member. The conveying apparatus is installed with a fixed rail 21 for a conveying line in a high position H and with a friction roller type drive unit 25 for driving an actual carrier 11 to the downstream side. Further, the conveying apparatus is installed with a fixed rail 26 for a return line in a low position L immediately below the fixed rail 21 and with a friction roller type drive unit 30 for driving an empty carrier 11 to the upstream side. In addition, drop lifters 31, each of which is mounted with a friction roller type drive unit 40 for driving a carrier 11 supported by a hoisting and lowering rail 36 in the longitudinal direction, are installed on the upstream side (a) and the downstream side (b) of the hoist work line HL so that the hoisting and lowering rails 36 are connected to the fixed rails, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a transfer apparatus having a lifting work line for performing work in a state in which the transferred object is transferred from the carriage to the carrier and raised in the middle of the path for transferring the transferred object on the common carriage and transported by the floor conveyor. It is about.

The new car painting process for automobiles includes an electrodeposition coating process, an intermediate coating process, and a top coating process. After each coating process, a drying process using a drying furnace is provided. Since it is necessary to immerse it in the treatment tank, it is carried out by an overhead conveyor. Carrying of the body in the drying process after electrodeposition coating, the intermediate coating process and the subsequent drying process, and the top coating process and the subsequent drying process is performed by a floor conveyor. It is common.
Also, between the electrodeposition coating process and the intermediate coating process, there is a sealing process for waterproofing the car body seams and an undercoating process for rust prevention on the underside of the car body. In the sealing process after drying in the drying furnace, work is performed while the vehicle is transported by the floor conveyor, and in the subsequent undercoating process, the work is done behind the floor. The lifter (see, for example, Patent Document 1) is used to transfer the vehicle body from the floor conveyor to the overhead conveyor. After the undercoating process, the droplifter is used to transfer the vehicle body from the overhead conveyor to the floor conveyor, and then dried by the floor conveyor. It is conveyed to a furnace (for example, refer to Patent Document 2).
As described above, there is a lift work line in the middle of the path where the transported object is placed on the common carriage and transported by the floor conveyor, and the work is performed with the transported object being transferred from the carriage to the carrier and raised. In the apparatus, an empty cart (hereinafter referred to as “empty cart”) after the object to be transported is transferred to the overhead conveyor by the drop lifter is transported to the downstream side. The transported object is transferred from the carrier of the overhead conveyor on the downstream side, and a return line for returning an empty carrier (hereinafter referred to as “empty carrier”) to the upstream side is provided. Has a horizontal loop shape (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 10-29794 (FIG. 1-2) JP 2000-39883 A (FIGS. 1 and 5-6)

In the transport device with the conventional ascending work line as described above, an overhead conveyor is used to transport the object to be transported in the ascending work line, and the carrier rail is supported by installing a traveling rail in a horizontal loop on the building beam. Therefore, the construction cost increases due to the need to provide the building with strength suitable for the suspension load, which increases the cost of installation work for heavy work using heavy equipment, and maintenance after installation. Sex is getting worse.
In addition, since the overhead conveyor path is a horizontal loop, its installation area increases.

In addition, on the upstream side of the ascending work line, the object to be transported is transferred from the carriage transported by the floor conveyor onto the mounting table at the lower position of the drop lifter, and the carrier hanger at the higher position to be transported by the overhead conveyor. With the drop lifter in the opened state, the carrier hanger is closed and positioned below the transferred object, the transferred object is lowered by the drop lifter, and the transferred object is transferred to the carrier, On the downstream side of the ascending work line, the object supported by the hanger is pushed up by the drop lifter mounting table, the transferred object is transferred onto the mounting table, and the carrier hanger is opened and the object is transferred by the drop lifter. It is necessary to lower the object and transfer the transferred object onto the empty cart.
Therefore, when transferring the object to be transported between the drop lifter and the carrier, the carrier hanger opening / closing operation and the drop lifter lifting / lowering operation are required. Delivery is not smooth and relatively complicated operations are required.

  Accordingly, in view of the above-described situation, the present invention intends to solve the problem by transferring the object to be transported from the carriage to the carrier in the middle of the path for placing the object to be conveyed on the common carriage and conveying it by the floor conveyor. In a transfer device with a rising work line that performs work in a wet state, the construction cost of the building can be reduced, the cost of installation work and maintenance work can be reduced, and the installation area can be further reduced. The object of the present invention is to provide a transport apparatus capable of facilitating delivery of a transported object and simplifying its operation.

  In order to solve the above problems, the transport device according to the present invention moves the transported object from the cart to the carrier and raises the transported object in the middle of the path on which the transported object is placed on a common cart and transported by a floor conveyor. A carrier device having a lifting work line that performs work in a state where the carrier includes a pair of frame bodies that are long in the front-rear direction and separated in the left-right direction, and a receiving member that is attached to each of them and extends inward in the left-right direction. And a pair of left and right transport line fixing rails that support the carrier so as to be movable in the front-rear direction, and a pair of left and right carriers supported by the transport line fixing rails. A conveying friction roller type driving device for driving the friction roller in pressure contact with at least one of the frame members and driving it downstream; A pair of left and right return line fixing rails that support the carrier so as to be movable in the front-rear direction are installed at a low position directly below the fixed rail for use, and a pair of left and right carriers of the carrier supported by the return line fixing rail are installed. The frame body is provided with a return friction roller type driving device for driving the friction roller in pressure contact with the friction roller, and a pair of right and left lifting rails for supporting the carrier movably in the front-rear direction, supported by the lifting rails. A drop lifter that lifts and lowers a pair of left and right lifting units attached to the pair of left and right frames of the carrier by a friction roller type driving device that is driven in the front-rear direction by pressing the friction rollers against each other. So that the elevating rail is connected to the upstream side and the downstream side of the fixed rail, respectively. Those obtained by installing on the upstream side and downstream side of the rising working line.

  According to the transfer device according to the present invention, the transfer object is transferred from the carriage to the carrier and is raised in the middle of the path on which the transfer object is placed on a common carriage and conveyed by a floor conveyor. A transport apparatus having a lifting work line to be performed, wherein the carrier is composed of a pair of long frame bodies separated in the left-right direction and long in the front-rear direction and a receiving member attached to each of them and extending inward in the left-right direction. A pair of left and right transport line fixed rails that support the carrier movably in the front-rear direction are installed at a high position of the line, and at least of the pair of left and right frame bodies of the carrier supported by the transport line fixed rails One side is provided with a conveying friction roller type driving device that presses the friction roller and drives it to the downstream side. A pair of left and right return line fixed rails that support the carrier so as to be movable in the front-rear direction are installed at a lower position below, and a pair of left and right frame bodies of the carrier supported by the return line fixed rails are respectively provided. A return friction roller type driving device for driving the friction roller in pressure contact and driving upstream is provided, and a pair of left and right lifting rails that support the carrier so as to be movable in the front-rear direction, and left and right of the carrier supported by the lifting rail A pair of left and right elevating parts attached to a pair of frame bodies and a friction roller type driving device that is driven in the front-rear direction by pressing the friction rollers against each other are supported by a pair of left and right props, and a drop lifter is moved up and down. The ascending work rail is connected so that a rail is connected to the upstream side and the downstream side of the fixed rail, respectively. Are installed on the upstream side and the downstream side of the frame, so that the carrier supports the object to be transported by a pair of long frame bodies spaced in the left-right direction and long in the front-rear direction and receiving members attached to these respectively in the left-right direction. The carrier is supported by a pair of left and right conveying line fixed rails and driven by a conveying friction roller type driving device to convey the object to be conveyed in the ascending work line, and an overhead conveyor is used. Since it is a structure which does not, it is not necessary to construct a running rail on the beam of a building.

Therefore, since it is not necessary to provide the building with the strength corresponding to the suspension load, it is possible to reduce the construction cost of the building, and it is not necessary to install the traveling rail on the beam of the building, thereby reducing the installation work cost. Can be reduced.
In addition, compared to overhead conveyors that have trolleys and driving devices on the upper side of the carrier that supports the object to be conveyed, the conveying friction roller type driving devices are located at a relatively low position and on the left and right of the conveying path. Therefore, since the maintenance work after installation can be performed relatively easily, the cost of the maintenance work can also be reduced.
In addition, an empty carrier supported by a pair of left and right return line fixed rails directly below the transfer line fixed rail is returned to the upstream side by being driven by a return friction roller type driving device. Since the empty carrier is configured to circulate in a vertical loop shape, the installation area can be reduced as compared with a configuration in which a route of the overhead conveyor is formed in a horizontal loop shape.

  In addition, with the lift rail of the upstream drop lifter in the low position and supporting the empty carrier, the lift rail is raised to transfer the object to be transferred from the carriage onto the carrier, and the lift rail is further raised for the transport line Connected to the fixed rail, driven by the friction roller type drive device, delivered to the fixed rail for the transfer line, driven by the transfer friction roller type drive device, conveyed downstream, and placed at the high position of the downstream drop lifter Deliver the carrier to a certain lifting rail, lower the lifting rail to transfer the object to be transported on the empty carriage, connect the lifting rail to the fixed rail for the return line, drive the empty carrier by the friction roller type drive device and return it Delivered to the fixed rail for the line and driven back by the friction roller drive for return A carrier consisting of a pair of long frame bodies spaced apart in the left-right direction and a receiving member extending inward in the left-right direction attached to each of them is circulated in the form of a vertical loop, and the ascending work line and its upstream side In addition, the conveyance of the object to be conveyed by the drop lifter on the downstream side holds the state where the object is supported by the carrier and conveys the carrier along the conveyance path. Compared with the configuration that requires opening / closing operation of the carrier hanger and raising / lowering operation of the drop lifter when transferring the object to be transported, the delivery of the object to be transported can be facilitated and the operation can be simplified. .

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and all the embodiments that satisfy the requirements described in the claims are described. Is included. In the present specification, the transport direction (see arrow F in the figure) is the front, and the left and right are frontward. Moreover, let the figure seen from the left be a front view.

  1 to 7 are schematic views showing a configuration of a transport device according to an embodiment of the present invention, FIG. 1 is a front view around a lifting work line, and FIG. 2 is a view of a drop lifter as seen from the rear. 3 is an enlarged front view around the downstream drop lifter, FIG. 4 is a perspective view of the carrier, FIG. 5 is a front view showing the transfer of the object to be transported on the downstream side of the ascending work line, and FIG. FIG. 7 is a plan view of the return line and the empty carriage transport line below the ascending work line.

As shown in FIG. 1, the transport apparatus according to the embodiment of the present invention is configured to transfer the transported object W from the carriage 2 in the middle of the path for transporting the transported object W on the common carriage 2 by the floor conveyor 1. For example, there is an ascending work line HL on which a worker (not shown) on the work floor F2 performs work in a state of being placed on the carrier 11 and raised, and the upstream side a and the downstream side a of the ascending work line HL are A drop lifter 31 is provided for each.
The transported object W on the carriage 2 stopped at the upstream side of the ascending work line HL moves onto the carrier 11 supported by the left and right lifting rails 36, 36 at the low position L of the upstream side drop lifter 31. (In the following, the carrier on which the article W to be transported is called “actual carrier”) is lifted together with the lifting rails 36 and 36 and the carrier 11 (see arrow A1 in the figure), and on the downstream side. It is transferred along with the carrier 11 onto the pair of left and right transport line fixed rails 21 and 21 at the high position H of the ascending work line HL and transported downstream (see arrow A2 in the figure).
Here, the pair of left and right transport line fixed rails 21 and 21 are positioned below a pair of left and right frame bodies 12 and 12 (described later) of the actual carrier 11, and as shown in FIG. It is installed at a relatively low position.
In addition, the empty carriage 2 that has transferred the article to be conveyed W to the drop lifter 31 is conveyed downstream by the floor conveyor 1 (see arrow B in the figure).

The actual carrier 11 transported downstream along the pair of left and right transport line fixed rails 21 and 21 is a pair of left and right lifting rails located at the high position H of the downstream drop lifter 31 on the downstream side of the ascending work line HL. 36, 36, and descends together with the lifting rails 36, 36 (see arrow A3 in the figure), and the article W to be transported is transferred from the carrier 11 onto the empty carriage 2 stopped below it. Then, it is conveyed downstream along with the carriage 2 by the floor conveyor 1 (see arrow A4 in the figure).
In addition, the empty carrier 11 that has transferred the object W to be transferred onto the empty carriage 2 is transferred to the pair of left and right return line fixed rails 26, 26 below the work floor F2 and transferred upstream ( (See arrow C in the figure).
As described above, the object to be transported W is transported, and the carrier 11 (real carrier and empty carrier) circulates in a vertical loop shape (rectangular shape) as indicated by arrows A1, A2, A3, and C shown in FIG.

Next, the configuration of the floor conveyor 1 will be described.
As shown in FIGS. 2 and 3, the floor F1 is provided with yokes 8,... By anchor bolts 9,... Along the conveyance path, and the openings are opposed to the yokes 8,. A pair of left and right traveling rails 7 and 7 having a substantially U-shaped cross section are fixed.
The left and right traveling rails 7, 7 have left and right traveling wheels 5, 5,... Of the carriage 2, which are supported by the trolley 4,. In order to engage, the carriage 2 is driven by a friction roller type driving device 10 that drives a friction roller 10A pressed against the side surfaces of the trolleys 4,... And the connecting rods 6,. Travel along the transport path.

Next, the configuration of the carrier 11 will be described.
As shown in FIG. 4, the carrier 11 includes a pair of long frame bodies 12, 12 that are spaced apart in the left-right direction and front and rear receiving members 20, 20 that are attached to these and extend inward in the left-right direction.
The frame body 12 includes, for example, upper and lower rods 13 and 14 extending in the front-rear direction and connecting members 15, 16, 17, and 18 that connect them, and the receiving members 20 and 20 are supported by the support members 19 and 19, for example. The left and right receiving members are substantially L-shaped and are composed of a vertical portion hanging from the support member 19 and a horizontal portion extending inward in the left-right direction from the lower end of the vertical portion. A transported object W is placed on the horizontal portions 20, 20,... (See also FIG. 2).
Note that the pair of left and right frame bodies 12 and 12 have the same shape as shown in FIG.

Next, a configuration around the pair of left and right conveyance line fixed rails 21 and 21 will be described.
The pair of left and right conveying line fixed rails 21 and 21 installed at the high position H shown in FIGS. 5 and 6 are arranged in parallel in the front and rear direction using a plurality of columns (not shown) and beams or the like that are laid across the columns. The rollers 21A,... Are fixed to the yokes 22, and are rotatable in the front-rear direction.
Further, guide rollers 23, 24 are attached to the yokes 22, so as to come into contact with the left and right side surfaces of the pair of left and right frame bodies 12, 12 in a state where the actual carrier 11 is on the fixed rails 21, 21 for the conveyance line. The friction roller 25A of the conveying friction roller type driving device 25 is pressed against the left side surface of the left frame body 12 (upper rod 13).
Therefore, the left and right frame bodies 12, 12 of the actual carrier 11 are placed in the left-right direction by the guide rollers 23, 24,... While being placed on the rollers 21A, 21A,. Since the propulsive force is applied to the left frame body 12 by the conveying friction roller type driving device 25, the actual carrier 11 is conveyed downstream. (See arrow A2 in the figure).
In the actual carrier 11, the left and right frame bodies 12, 12 and the receiving members 20, 20,... Are integrated via the article to be conveyed W, so that one of the left and right frame bodies 12, 12 is subjected to friction for conveyance. It may be driven by the roller type driving device 25, but both the left and right frame bodies 12, 12 may be driven by the conveying friction roller type driving devices 25, 25.

Next, the configuration around the pair of left and right return line fixed rails 26 and 26 will be described.
The pair of left and right return line fixing rails 26, 26 installed at the low position L shown in FIGS. 5 and 7 are fixed to yokes 27,... Rollers 26A,... That are positioned directly below the line fixing rails 21 and 21 and are rotatable around the left and right axis are arranged in parallel in the front-rear direction.
Further, guide rollers 28 and 29 are attached to the yokes 27 so as to contact the left and right side surfaces of the pair of left and right frame bodies 12 and 12 with the empty carrier 11 being on the return line fixing rails 26 and 26. On the left side of the left frame body 12 (upper rod 13) and the right side of the right frame body 12 (upper rod 13), friction rollers 30A, 30A of the return friction roller type drive devices 30, 30 are provided. Press contact.
Therefore, the left and right frame bodies 12, 12 of the empty carrier 11 are placed in the left-right direction by the guide rollers 28, 29,... While being placed on the rollers 26A, 26A,. Since the forward movement is applied to the frame bodies 12 and 12 by the return friction roller type driving devices 30 and 30, the empty carrier 11 is moved upstream. Returned (see arrow C in the figure).

Next, the configuration of the drop lifter 31 will be described.
The lifters 31 and 31 installed on the upstream side and the downstream side B of the ascending work line HL shown in FIGS. 1 to 3 have the same configuration, and a top plate 33 is interposed between the upper portions of the left and right support columns 32 and 32. A pair of right and left lifting portions 35, 35 are supported in a vertically movable manner by horizontally extending rails 34, 34 fixed to the columns 32, 32 and extending in the vertical direction and guide rollers (not shown).
And one end is fixed to the upper part of the raising / lowering parts 35 and 35, and the raising / lowering parts 35 and 35 are made to wind by winding / feeding out the chains 41A and 41B hanging down via the sprockets 42A and 42B by an unillustrated raising / lowering driving device. Go up and down.
A pair of left and right elevating rails 36, 36 extending in the front-rear direction are attached to the pair of left and right elevating parts 35, 35, and rollers 36A,. It is installed side by side.
Further, yokes 37,... Are attached to the elevating rails 36, 36 in the front-rear direction. The guide rollers 38, 39, the actual carrier 11 or the empty carrier 11 are elevating rails 36, 36 to the yokes 37,. The left and right frame bodies 12 (upper rods 13) are attached to the left and right side surfaces of the pair of left and right frame bodies 12 and 12. The friction rollers 40A, 40A of the friction roller type driving devices 40, 40 are pressed against the right side surface of the motor.

Therefore, in the upstream side drop lifter 31 (see FIG. 1A), the return friction roller type driving device 30, with the lifting rails 36, 36 connected to the return line fixed rails 26, 26 at the low position L, 30, the empty carrier 11 returned to the upstream side along the return line fixed rails 26, 26 can be driven upstream by the friction roller type driving devices 40, 40 to be received on the lifting rails 36, 36. (Refer to FIG. 1A and the two-dot chain line in FIG. 2) In a state where the elevating rails 36, 36 are connected to the conveyance line fixed rails 21, 21 at the high position H, the actual carrier 11 is driven by the friction roller type driving device 40. , 40 can be driven to the downstream side and transferred onto the fixed rails 21 and 21 for the transport line (see the solid line in FIG. 2).
Further, in the downstream side drop lifter 31 (refer to FIG. 1A), the conveying friction roller driving device 25, with the lifting rails 36, 36 connected to the conveying line fixed rails 21, 21 at the high position H, 25, the actual carrier 11 conveyed downstream along the conveyance line fixed rails 21, 21 can be driven downstream by the friction roller type driving devices 40, 40 and received on the elevating rails 36, 36. (Refer to the solid line in FIG. 1, the solid line in FIG. 2, and FIG. 3) In the state where the elevating rails 36, 36 are connected to the return line fixed rails 26, 26 in the low position L, the empty carrier 11 is driven by the friction roller type. It can be driven to the upstream side by 40, 40 and delivered onto the return line fixed rails 26, 26 (see the two-dot chain line in FIG. 2).

According to the configuration of the transport apparatus as described above, the pair of frame bodies 12 and 12 that are long in the front-rear direction and separated in the left-right direction, and the receiving members 20, 20,. The carrier 11 that supports the transported object W is configured, and the actual carrier 11 is supported by the pair of left and right transport line fixing rails 21 and 21 and is driven by the transport friction roller type driving device 25, thereby being covered in the ascending work line HL. Since the transported object W is transported and does not use an overhead conveyor, there is no need to install a traveling rail on the beam of the building.
Therefore, since it is not necessary to provide the building with the strength corresponding to the suspension load, it is possible to reduce the construction cost of the building, and it is not necessary to install the traveling rail on the beam of the building, thereby reducing the installation work cost. Can be reduced.
In addition, compared to an overhead conveyor having a trolley and a drive device on the upper side of the actual carrier 11, the conveyance friction roller type drive device 25 and the guide rollers 23, 24, etc. Since it is located, the maintenance work after installation can be performed relatively easily, so the cost of the maintenance work can also be reduced.
In addition, the empty carrier 11 supported by the pair of left and right return line fixed rails 26 and 26 immediately below the transfer line fixed rails 21 and 21 is driven by the return friction roller type drive devices 30 and 30, and thereby the upstream side. Since the actual carrier 11 and the empty carrier 11 are circulated in a vertical loop shape (rectangular shape) as described above, it is installed in comparison with a configuration in which a route of the overhead conveyor is formed in a horizontal loop shape. The area can be reduced.

  In addition, with the lifting rails 36, 36 of the upstream drop lifter 31 set to the low position L and supporting the empty carrier 11, the lifting rails 36, 36 are raised to place the article W to be transported on the carrier 11 from the carriage 2. In addition, the elevating rails 36 and 36 are further lifted and connected to the transport line fixed rails 21 and 21, and the actual carrier 11 is driven by the friction roller type driving devices 40 and 40, and delivered to the transport line fixed rails 21 and 21. Then, it is driven by the conveying friction roller type driving device 25 and conveyed to the downstream side, the actual carrier 11 is delivered to the lifting rails 36 and 36 at the high position H of the downstream side drop lifter 31, and the lifting rails 36 and 36 are lowered. The transported object W is transferred onto the empty carriage 2 and the lifting rails 36 and 36 are connected to the return line fixing rails 26 and 26. The configuration is such that the empty carrier 11 is driven by the friction roller type driving devices 40, 40, delivered to the return line fixed rails 26, 26 and driven by the returning friction roller type driving devices 30, 30, and returned in the left-right direction. A carrier 11 comprising a pair of long frame bodies 12, 12 spaced apart in the front-rear direction and receiving members 20, 20,... Attached to them and extending inward in the left-right direction is circulated in the form of a vertical loop, and the ascending work line HL and The transport of the transported object W by the upstream and downstream drop lifters 31, 31 is carried out along the transport path while holding the transported object W supported by the carrier 11 along the transport path. Opening and closing operation of the carrier hanger when transferring the object to be transported between the drop lifter and the carrier, such as a transport device, and Elevating operation of Roppurifuta is compared to the required configuration, it is possible to simplify the smooth and the operation of transferring the object to be conveyed.

It is a front view around the raising work line in the conveying apparatus concerning an embodiment of the invention. Similarly, it is the figure which looked at the drop lifter from back. It is an enlarged front view around the downstream drop lifter. It is a perspective view of a carrier. It is a front view which shows the transfer of the conveyed product in the downstream of a raise work line. It is a top view of the conveyance line in a raising work line. It is a top view of the return line and empty carriage conveyance line below the ascent work line.

Explanation of symbols

H High position L Low position HL Ascending work line W Conveyed object 1 Floor conveyor 2 Carriage 7 Traveling rail 10 Friction roller type driving device 10A Friction roller 11 Carrier 12 Frame body 20 Receiving member 21 Fixed rails 23 and 24 for conveying line Guide rollers 25 Friction roller type driving device 25A Friction roller 26 Return rail fixed rails 28, 29 Guide roller 30 Return friction roller type driving device 30A Friction roller 31 Drop lifter 32 Post 35 Lifting unit 36 Lifting rail 38, 39 Guide roller 40 Friction roller type drive device 40A Friction roller

Claims (1)

In the middle of the route on which the object to be conveyed is placed on a common carriage and conveyed by a floor conveyor, the conveying apparatus has a lifting work line for performing the work in a state in which the object to be conveyed is transferred from the carriage to the carrier and raised. And
The carrier is composed of a pair of frame bodies that are long in the front-rear direction and separated in the left-right direction, and receiving members that extend inward in the left-right direction, respectively attached thereto
A pair of left and right transport line fixed rails that support the carrier so as to be movable in the front-rear direction are installed at a high position of the ascent work line, and a pair of left and right frames of the carrier supported by the transport line fixed rails A friction roller driving device for conveyance that drives the downstream side by pressing the friction roller to at least one of the body,
A pair of left and right return line fixing rails that support the carrier so as to be movable in the front-rear direction are installed at a low position directly below the conveyance line fixing rails, and the carrier supported by the return line fixing rails. A friction roller type drive device for return that drives the upstream by pressing the friction roller to the pair of left and right frames respectively,
A pair of left and right lifting rails that support the carrier so as to be movable in the front-rear direction, and a friction roller type drive that drives the friction rollers against the pair of left and right frame bodies supported by the lifting rails in the front-rear direction. The lifting operation is performed so that a drop lifter that lifts and lowers a pair of left and right lifting units to which the device is attached is connected to the upstream side and the downstream side of the fixed rail. A conveying apparatus characterized by being installed on the upstream side and downstream side of the line.

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