JP2015081026A - Carriage conveyance apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carriage conveyance apparatus that stably conveys a carriage in spite of a simple configuration, at a place where a carriage track crosses a physical distribution passage at a turning point of an assembly line.SOLUTION: A carriage conveyance apparatus 1 for conveying a plurality of carriages 13 on a track 17 of an assembly line along long guide rails of a track that crosses a physical distribution passage at a turning point of the assembly line, is characterized in that the turning point is provided with: carriage turning devices 2, 3 comprising turning means 24, 34 which turn the carriage 13 from a receiving position to a delivery position in a state of engaging to the carriage; and transportation means 21, 31 which transport the carriage in a state of engaging to the carriage.

Description

  The present invention relates to a carriage transporting apparatus that transports a carriage along a guide rail, for example, in an automobile assembly line (hereinafter referred to as “assembly line”).

In general, an assembly line includes a cart transport device that transports a plurality of carts along a long guide rail using a drive device such as a chain drive or a friction drive. This assembly line is formed so that the assembly of the automobile is completed by sequentially assembling the equipment and the like defined for each model with respect to the vehicle body mounted on the carriage. Normally, assembly lines are arranged with the straight line folded back 180 degrees in order to make efficient use of factory space, and the equipment to be assembled is arranged along the straight line side (both sides of the track). It is placed on the parts shelf. The parts transporter supplies the parts to the parts shelf. For this reason, a distribution passage through which the component transport vehicle passes is provided between the component shelves placed on the line side of the assembly line and the component shelves. As a result, the track of the carriage on the assembly line may intersect the distribution path at the turn-back point.
However, since a cart drive device and guide rails cannot be provided in the physical distribution passage, the traveling posture of the cart becomes unstable, and there is a problem that the cart stops in the middle of the physical distribution passage.

In order to deal with such a problem, for example, as shown in FIG. 14, the friction drive units 103 and 104 that can extend and contract to move the carriage 101 to the upstream side and the downstream side in the carriage conveyance direction with the distribution passage 105 interposed therebetween. A configuration is adopted in which a plurality of trucks are installed along the track 102 to cross the distribution passage 105 while pushing the side walls of the carriage 101 on both sides of the distribution passage 105.
Further, for example, as disclosed in Patent Document 1, the carriage is provided with sub guided members on the front side and the rear side of the main guided member provided in the center portion, and the carriage is conveyed with the physical distribution passage interposed therebetween. A configuration is also conceivable in which auxiliary guide rails that engage with the auxiliary guided members of the carriage are provided on the upstream side and the downstream side in the direction.
According to these configurations, it is possible to ensure the straightness of the carriage even in the distribution passage where no guide rail is laid, and to avoid the inconvenience that the carriage stops in the middle of the distribution passage.

JP 2005-81950 A

However, in the configuration shown in FIG. 14, a plurality of friction drive units 103 and 104 must be installed in a narrow portion of the turn-back point, and the number of drive motors and expansion / contraction units in the friction drive units 103 and 104 is large. However, there is a problem that the equipment cost and maintenance cost of the cart transport device increase.
Moreover, according to the structure of patent document 1, it is necessary to provide a sub guided member in the front side and rear side of a main guided member for every cart, respectively. Moreover, it is necessary to provide the sub guide rail which a sub guided member engages in the both sides of a physical distribution channel | path. For this reason, the number of sub-guided members and sub-guide rails that are consumables is greatly increased. As a result, even in this case, there is a problem that the equipment cost and the maintenance cost of the carriage transport device increase.

  The present invention has been made to solve the above-described problems, and enables a stable transportation of a carriage while having a simple configuration at a position where the carriage track and the distribution path intersect at the turn-back point of the assembly line. An object of the present invention is to provide a cart transport device.

In order to solve the above-described problems, a cart transport apparatus according to the present invention has the following configuration.
(1) A cart transporting device that transports a plurality of carts on a track of an assembly line along a long guide rail, and the track crosses a physical distribution passage at a turnaround point of the assembly line,
At the turning point, there is provided a cart turning device including a turning means for turning the cart from the receiving position to the delivery position of the cart while being engaged, and a conveying means for conveying the cart while being engaged. It is characterized by that. Here, the “state in which the carriage is engaged” means a state in which the carriage cannot move relative to the carriage turning device except for movement in the traveling direction of the carriage.

In the present invention, the carriage turning device includes turning means for turning the carriage while the carriage is engaged from the receiving position of the carriage to the delivery position. Therefore, the carriage engaged with the carriage turning device at the receiving position corresponds to the carriage turning device. In a state where the position of the carriage is maintained, the vehicle can turn from the receiving position to the delivery position, and the position of the carriage at the delivery position is stabilized. Moreover, since the cart turning device includes transport means for transporting the cart with the cart engaged, the cart that has been swung can move forward while maintaining the posture at the delivery position and cross the physical distribution passage.
In addition, since the cart turning device is provided at the folding point, there is no need to install a plurality of drive units at a narrow portion of the folding point, and the sub guided member is provided on the front side and the rear side of the main guided member for each cart. In addition, it is not necessary to provide sub-guide rails with which the sub-guided member is engaged on both sides of the physical distribution passage. For this reason, the equipment cost and maintenance cost of the cart transportation device can be greatly reduced.
Therefore, according to the present invention, it is possible to provide a cart transport device that enables stable transport of a cart while having a simple configuration at a location where the track of the cart and the physical distribution passage intersect at the turn-back point of the assembly line. it can.

(2) In the cart transportation device described in (1),
The bogie turning device includes a first bogie turning device arranged on the upstream side in the carrying direction of the bogie and a second bogie turning device arranged on the downstream side in the carrying direction of the bogie with the physical distribution passage interposed therebetween. The delivery position of the first bogie turning device and the receiving position of the second bogie turning device are adjacent to each other on the physical distribution passage.

In the present invention, the bogie turning device includes a first bogie turning device arranged on the upstream side in the carrying direction of the bogie and a second bogie turning device arranged on the downstream side in the carrying direction of the bogie across the physical distribution passage. Therefore, the carriage can be turned along the corner portion of the turn-back point via the first carriage turning device and the second carriage turning device. In addition, since the delivery position of the first bogie turning device and the receiving position of the second bogie turning device are adjacent to each other on the physical distribution passage, logistics can be performed while transferring the bogie from the first bogie turning device to the second bogie turning device. The passage can be transported in a stable posture.
Further, when the delivery of the carriage from the first carriage turning device to the second carriage turning device is completed, the first carriage turning device can return to the receiving position and engage with the next carriage. Therefore, the carriage at the turn-back point can be transported in a short time.

(3) In the cart conveyance device described in (1) or (2),
At least two guide rollers that engage with the guide rails are erected at the lower end of the carriage, and the carriage turning device includes an engagement rail that engages with the guide rollers at the receiving position, The conveying means is characterized in that the carriage can be conveyed along the engagement rail.

In the present invention, at least two guide rollers that engage with the guide rails are erected at the lower end of the carriage, and the carriage turning device is provided with an engagement rail that engages with the guide rollers at the receiving position. After the carriage is engaged by engaging the guide roller with the guide rail of the assembly line, the carriage guide roller is engaged with the engagement rail of the carriage turning device at the receiving position, and the carriage turning device is engaged with the carriage. Can be turned in a state. In addition, after the cart turning device is turned with the cart engaged, the guide roller can be engaged with the guide rail of the assembly line to transport the cart.
Further, since the conveying means of the cart turning device can convey the cart along the engaging rail, the conveying means moves the cart along the engaging rail after turning the cart from the receiving position to the delivery position or during the turning. Can be moved. As a result, the carriage can cross the physical distribution passage after or while turning around the turning point.
In addition, after a cart moves along an engagement rail and a guide roller detaches | leaves from an engagement rail, a cart turning apparatus can be returned to a receiving position, and it can be engaged with the cart conveyed next.
Therefore, the carts can be conveyed one after another by providing the cart swivel device with the above simple structure at a location where the track of the cart and the physical distribution passage intersect at the turn-back point of the assembly line.

(4) In the cart transportation device described in (3),
The conveying means is a friction drive device including a drive roller that is in frictional contact with the side wall of the carriage.

In the present invention, since the conveying means is a friction drive device including a drive roller that is in frictional contact with the side wall of the carriage, the carriage is engaged with the engagement rail of the carriage turning device by the pressing force of the drive roller against the side wall of the carriage. The position can be fixed in the combined state. Specifically, at least two guide rollers and the engagement rail come into contact with each other at two or more points, and the drive roller presses the side wall of the cart at one point, so that the cart turning device can hit the cart at three or more points. It can be held in contact. The cart turning device can prevent a change in position, a positional deviation, and the like when the cart is turned by holding the cart in contact with three or more points.
The drive roller is preferably an elastic member such as hard urethane. This is because the carriage can be held in a more powerful and stable state.

  ADVANTAGE OF THE INVENTION According to this invention, the trolley | bogie conveyance apparatus which enables the stable conveyance of a trolley | bogie can be provided, although it is a simple structure in the location where the track | orbit of a trolley | bogie and a physical distribution path cross | intersect in the return point of an assembly line.

It is a schematic plan view of the cart conveyance device according to the present embodiment. It is a schematic plan view of the cart turning device in the cart transport device shown in FIG. (A) shows the state which engaged with the trolley | bogie, (b) shows the state which is turning the trolley | bogie. It is a front view of the trolley | bogie shown in FIG. It is a flowchart of the trolley | bogie conveyance apparatus shown in FIG. It is operation | movement explanatory drawing (trolley fast-forward) of the trolley | bogie conveying apparatus shown in FIG. It is operation | movement explanatory drawing (engagement with an engagement rail) of the trolley | bogie conveyance apparatus shown in FIG. It is operation | movement explanatory drawing (table turning) of the trolley | bogie conveying apparatus shown in FIG. It is operation | movement explanatory drawing (cart advance) of the trolley | bogie conveyance apparatus shown in FIG. It is operation | movement explanatory drawing (cart advance) of the trolley | bogie conveyance apparatus shown in FIG. It is operation | movement explanatory drawing (cart advance) of the trolley | bogie conveyance apparatus shown in FIG. It is operation | movement explanatory drawing (table turning) of the trolley | bogie conveying apparatus shown in FIG. It is operation | movement explanatory drawing (table turning) of the trolley | bogie conveying apparatus shown in FIG. It is operation | movement explanatory drawing (trolley fast-forward) of the trolley | bogie conveying apparatus shown in FIG. It is a schematic plan view of the conventional cart conveyance device.

  Next, a cart conveyance device according to an embodiment of the present invention will be described in detail with reference to the drawings. First, the outline | summary of the trolley | bogie conveyance apparatus of this embodiment is demonstrated, and the structure and operation | movement method of the trolley | bogie turning apparatus in this trolley | bogie conveyance apparatus are demonstrated after that. Finally, a control method in which the bogie transport device transports the bogie at a location where the track of the bogie intersects the physical distribution path at the turn-back point of the assembly line will be described.

<Outline of cart transport device>
First, the outline | summary of the trolley | bogie conveyance apparatus which concerns on this embodiment is demonstrated using FIG. FIG. 1 shows a schematic plan view of a cart transport apparatus according to this embodiment.
As shown in FIG. 1, the cart transport apparatus 1 includes a track 17 that transports a plurality of carts 13. The track 17 of the carriage is formed by two parallel rails, and is folded back in a substantially U shape by 180 degrees in plan view at the turn-back point of the assembly line. A distribution passage 4 extending in a direction orthogonal to the track 17 is formed at the center of the turning point of the track 17. At the corner portion of the turning point, the first bogie turning device 2 is disposed on the upstream side in the cart conveying direction (in the direction of the arrow) across the physical distribution passage 4, and the second bogie turning device is arranged on the downstream side in the bogie conveying direction. 3 is disposed. The first bogie turning device 2 and the second bogie turning device 3 have substantially symmetric outer shapes with the physical distribution passage 4 in between.
The first bogie turning device 2 and the second bogie turning device 3 are provided with turning tables 22 and 32 having substantially right trapezoidal shapes, respectively. The turning tables 22 and 32 are respectively provided with turning drive motors (corresponding to “turning means” in claim 1) 24 and 34 that can turn about 90 degrees. The turning centers of the turning tables 22 and 32 are provided at symmetrical positions with respect to the distribution passage 4 inside the track 17 at the turn-back point. In addition, friction motors (corresponding to “conveying means” in claim 1) 21 and 31 for advancing the carriage 13 along the lower base (long side) of the turning table are mounted on the respective turning tables 22 and 32. .

The carriage 13 that has been transported in the direction of the arrow on the track 17 of the assembly line engages with the first carriage turning device 2 and then turns about 90 degrees in the direction of the arrow together with the turning table 22 of the first carriage turning device 2. To do. The carriage 13 is substantially parallel to the central portion of the turning point after turning. The turning table 32 of the second bogie turning device 3 extends on the tip of the distribution passage 4 and stands by, and receives the bogie 13 that has turned together with the turning table 22 of the first bogie turning device 2. The delivery (transfer) of the carriage 13 from the first carriage turning device 2 to the second carriage turning device 3 is performed by the friction motor 21 of the first carriage turning device 2 and the friction motor 31 of the second carriage turning device 3, respectively. Rotating in the same direction, the drive rollers 211 and 311 advance the carriage 13 along the lower bases (long sides) of the turntables 22 and 32.
The turning table 32 of the second bogie turning device 3 engages the received bogie 13 and turns about 90 degrees in the direction of the arrow, and delivers the bogie 13 to the folded back track 17. This delivery is also performed when the friction motor 31 of the second cart turning device 3 rotates and the drive roller 311 advances the cart 13 along the lower bottom (long side) of the turning table 32.
As described above, at the turn-around point of the assembly line, the distribution path while turning the carriage 13 using the cart turning devices 2 and 3 having a simple configuration at the place where the track 17 of the carriage 13 and the distribution path 4 intersect. Can be crossed.

<Configuration and operation method of bogie turning device>
Next, the configuration and operation method of the cart turning device in the cart transport device 1 will be described with reference to FIGS. 2 and 3. Since the first bogie turning device and the second bogie turning device have the same basic configuration and operation method, the first bogie turning device 2 will be described as an example here. FIG. 2 shows a schematic plan view of a cart turning device in the cart conveying device shown in FIG. FIG. 3 shows a front view of the cart and the cart turning device shown in FIG.

As shown in FIGS. 2 and 3, the cart turning device 2 includes a turning table 22 having a substantially right trapezoidal shape. On the lower bottom (long side) side of the turntable 22, a concave groove-shaped engagement rail 25 having a length substantially the same as the lower bottom (long side) is formed.
A lifting device 19 is attached to the upper end of the substantially rectangular carriage 13, and a vehicle body W is mounted on the lifting device 19. In addition, at the lower end of the carriage 13, free wheels 18 are attached to the front, rear, left and right. The universal wheel 18 rotates on the track 17 laid on the floor surface Fl. Two cylindrical guide rollers 14 project from the lower end of the carriage 13 and to the left outer side of the free wheel 18 in the front-rear direction. The guide roller 14 is supported so as to be rotatable in the horizontal direction.

  As shown in FIGS. 2A and 3, when the carriage 13 is conveyed in the direction of the arrow, the two guide rollers 14 are inserted between the grooves of the engagement rail 25 and engaged. At this time, the drive roller 211 of the friction motor 21 mounted near the lower bottom (long side) front end of the turning table 22 presses the left side wall 131 of the carriage 13 in the surface direction. For this reason, the guide roller 14 and the engagement rail 25 come into contact at two points, and the drive roller 211 and the left side wall 131 of the carriage 13 come into contact at one point. Can be held. The cart turning device 2 can prevent a change in posture or a positional deviation when the cart 13 is turned by holding the cart 13 at three points.

As shown in FIGS. 2B and 3, a turning drive motor 24 is mounted on the upper bottom (short side) side of the turning table 22. When the turning drive motor 24 rotates, the turning table 22 turns in the direction of the arrow. In the state where the guide roller 14 of the carriage 13 is engaged with the engagement rail 25, the drive roller 211 of the friction motor 21 presses the left side wall of the carriage 13 so as to make frictional contact. At the same time, the carriage 13 also turns.
When the friction motor 21 rotates after the turn, the drive roller 211 pushes the left side wall 131 of the carriage 13 forward, so that the carriage 13 is guided by the engagement rail 25 and moves forward in the transport direction.

<Control method of cart transport device>
Next, the control method of the cart conveyance apparatus in this embodiment is demonstrated using FIGS. FIG. 4 shows a flowchart of the cart conveyance device shown in FIG. FIG. 5 is a diagram for explaining the operation of the carriage conveying device shown in FIG. FIG. 6 is an operation explanatory view (engaged with the engagement rail) of the cart conveyance device shown in FIG. FIG. 7 is an operation explanatory diagram (table turning) of the cart conveyance device shown in FIG. FIG. 8 to FIG. 10 show operation explanatory diagrams (cart forward) of the cart conveyance device shown in FIG. FIG. 11 and FIG. 12 show operation explanatory views (table turning) of the cart conveyance device shown in FIG. FIG. 13 is a diagram for explaining the operation of the carriage conveying device shown in FIG.

As shown in FIGS. 4 and 5, with the guide roller 14 of the carriage 13 engaged with the guide rail 15 of the assembly line, the carriage 13 is transported on the track 17 to operate the carriage fast-forward detector 11a. Then, an ON signal is transmitted from the control device, and the fast-forward motor 12 rotates to fast-forward the carriage 13 in the direction of the arrow (step S1).
At this time, the first bogie turning device 2 is stationary at the receiving position of the bogie so that the engagement rail 25 is aligned with the guide rail 15.
Further, the second bogie turning device 3 is stationary at the delivery position of the bogie so that the engagement rail 35 is aligned with the guide rail 15 on the folding side. The carriage 13 conveyed by the second carriage turning device 3 and engaged with the guide rail 15 on the folding side is conveyed in the direction of the arrow by the fast-forward motor 12. Here, the virtual line 5 has shown the safety fence.

Next, as shown in FIGS. 4 and 6, when the guide roller 14 of the carriage 13 fast-forwarded to the first carriage turning device 2 is inserted into the engagement rail 25 and the carriage arrival detector 11b is operated, the control device Is transmitted, the fast-forward motor 12 is stopped, and the carriage 13 is engaged with the engagement rail 25 of the first carriage turning device 2 (step S2).
At this time, the rear carriage 13 is temporarily stopped by the brake motor 16. The carriage 13 conveyed by the second carriage turning device 3 and engaged with the guide rail 15 on the folding side is conveyed in the direction of the arrow by the fast-forward motor 12 as it is.

Next, as shown in FIGS. 4 and 7, when the fast-forward motor 12 stops, an ON signal is transmitted from the control device, the turning drive motor 24 rotates in the forward direction, and the first bogie turning device 2 is moved to the bogie. In a state where 13 is engaged, the vehicle turns from the receiving position to the delivery position (step S3).
At this time, the turning drive motor 34 of the second cart turning device 3 rotates in the reverse direction, and the second cart turning device 3 turns from the delivery position to the receiving position.
At this stage, the rear carriage 13 that has been temporarily stopped by the brake motor 16 is released from the stop and conveyed in the direction of the arrow. Further, the carriage 13 engaged with the guide rail 15 on the folding side is also conveyed by the braking motor 16 in the direction of the arrow.

Next, as shown in FIGS. 4 and 8, when the first bogie turning device 2 turns to the delivery position and operates the turning end detector 11c, an OFF signal is transmitted from the control device, and the turning drive is performed. The motor 24 stops (step S4).
At this time, the engagement rail 25 of the first cart turning device 2 and the engagement rail 35 of the second cart turning device 3 are aligned on a straight line. The engagement rail 25 of the first bogie turning device 2 and the engaging rail 35 of the second bogie turning device 3 are in contact with each other at the intermediate portion of the physical distribution passage 4.

Next, as shown in FIGS. 4 and 9, when the turning drive motor 24 stops, an ON signal is transmitted from the control device, and the friction motor 21 of the first cart turning device 2 and the friction of the second cart turning device 3 are transmitted. The motor 31 rotates in the forward direction and advances the carriage 13 in the direction of the arrow along the engagement rails 25 and 35 (step S5).
At this time, since the guide roller 14 of the carriage 13 is engaged with the engagement rail 25 of the first carriage turning device 2 and the engagement rail 35 of the second carriage turning device 3, the carriage 13 ensures straight traveling performance. Yes, there is no risk of stopping in the middle of the distribution channel.

  Next, as shown in FIGS. 4 and 10, when the carriage 13 arrives at the receiving position of the second carriage turning device 3 and operates the carriage arrival detector 11 d, an OFF signal is transmitted from the control device. Then, the friction motor 21 of the first cart turning device 2 and the friction motor 31 of the second cart turning device 3 are stopped, and the cart 13 is engaged with the engagement rail 35 of the second cart turning device 3 (step S6).

Next, as shown in FIGS. 4 and 11, when the friction motor 21 of the first bogie turning device 2 and the friction motor 31 of the second bogie turning device 3 are stopped, an ON signal is transmitted from the control device, and the second The turning drive motor 34 of the cart turning device 3 rotates in the forward direction to turn the cart 13 from the receiving position to the delivery position in an engaged state (step S7).
At this time, the turning drive motor 24 of the first bogie turning device 2 rotates in the reverse direction to turn the turning table 22 from the delivery position to the receiving position.

Next, as shown in FIGS. 4 and 12, when the second bogie turning device 3 turns to the delivery position and operates the turning end detector 11e, an OFF signal is transmitted from the control device, and the turning drive is performed. The motor 34 stops (step S8).
At this time, when the first bogie turning device 2 turns to the receiving position and operates the turning end detector 11f, an OFF signal is transmitted from the control device, and the turning drive motor 24 stops.

Next, as shown in FIGS. 4 and 13, when the turning drive motor 34 of the second carriage turning device 3 stops, an ON signal is transmitted from the control device, and the friction motor 31 of the second carriage turning device 3 and the fast-forwarding are performed. The motor 12 rotates in the forward direction to advance the carriage 13 in the direction of the arrow along the engagement rail 35 and the turn-around guide rail 15 (step S9).
At this time, the rear carriage 13 moves forward toward the first carriage turning device 2 as the fast-forward motor 12 rotates in the forward direction.

<Effect>
As described above in detail, according to the cart conveyance device 1 according to the present embodiment, the cart turning devices 2 and 3 turn the cart while the cart is engaged from the receiving position of the cart 13 to the delivery position. Since the motors 24 and 34 are provided, the carriage 13 engaged with the cart turning devices 2 and 3 at the receiving position turns from the receiving position to the delivery position in a state where the posture of the carriage 13 with respect to the cart turning devices 2 and 3 is maintained. The posture of the carriage 13 at the delivery position can be stabilized. Further, since the cart turning devices 2 and 3 include the friction motors 21 and 31 that convey the cart in an engaged state, the cart 13 that has been turned advances while maintaining the posture at the delivery position, and moves along the distribution passage 4. You can cross.
In addition, since the cart turning devices 2 and 3 are provided at the folding point, it is not necessary to install a plurality of drive units at a narrow portion of the folding point, and the sub-carriage is provided on the front and rear sides of the main guided member for each cart. There is no need to provide a guided member, and it is not necessary to provide sub-guide rails to be engaged with the sub-guided member on both sides of the distribution passage. For this reason, the equipment cost and maintenance cost of the cart transportation device can be greatly reduced.

Further, according to the present embodiment, the cart turning device is arranged on the downstream side in the transport direction of the cart 13 and the first cart turning device 2 arranged on the upstream side in the transport direction of the cart 13 with the physical distribution passage 4 interposed therebetween. Therefore, the carriage 13 can be turned along the corner portion of the turn-back point via the first carriage turning apparatus 2 and the second carriage turning apparatus 3. Further, since the delivery position of the first bogie turning device 2 and the receiving position of the second bogie turning device 3 are arranged adjacent to each other, the bogie 13 can be transferred from the first bogie turning device 2 to the second bogie turning device 3. Therefore, the physical distribution passage 4 can be transported in a stable posture.
Further, when the delivery of the carriage from the first carriage turning device 2 to the second carriage turning device 3 is completed, the first carriage turning device 2 can return to the receiving position and engage with the next carriage 13. Therefore, the carriage 13 can be transported in a short time at the turning point.

In addition, according to the present embodiment, two guide rollers 14 that engage with the guide rail 15 are erected at the lower end of the carriage 13, and the carriage turning devices 2 and 3 are connected to the guide roller 14 at the receiving position. Since the engaging rails 25 and 35 to be engaged are provided, the guide roller 14 is engaged with the guide rail 15 of the assembly line to convey the carriage 13, and then the guide roller 14 of the carriage 13 is moved to the carriage turning device at the receiving position. The carriage turning devices 2 and 3 can be turned in a state where the carriage 13 is engaged with the two or 3 engagement rails 25 and 35. Further, after the cart turning devices 2 and 3 are swung while the cart 13 is engaged, the cart 13 can be conveyed by engaging the guide roller 14 with the guide rail 15 of the assembly line.
In addition, since the friction motors 21 and 31 of the cart turning devices 2 and 3 can transport the cart 13 along the engagement rails 25 and 35, after the cart 13 is turned from the receiving position to the delivery position or during the turning. The friction motors 21 and 31 can move the carriage 13 along the engagement rails 25 and 35. As a result, the carriage 13 can cross the physical distribution path 4 after turning around the turning point or while turning.
In addition, after the carriage 13 moves along the engagement rails 25 and 35 and the guide roller 14 is detached from the engagement rail, the carriage turning devices 2 and 3 are returned to the receiving position and engaged with the carriage 13 to be conveyed next. Can be combined.

  In addition, according to the present embodiment, the friction motors 21 and 31 are friction drive devices including the drive rollers 211 and 311 that are in frictional contact with the side wall 131 of the carriage 13, and thus the drive rollers 211 and 311 with respect to the side wall 131 of the carriage. Due to this pressing force, displacement of the carriage 13 can be prevented with the carriage 13 engaged with the engagement rails 25 and 35 of the carriage turning devices 2 and 3. Specifically, the two guide rollers 14 arranged in the front and rear and the engagement rails 25 and 35 are engaged, and the drive rollers 211 and 311 press the side wall 131 of the carriage, whereby the cart turning devices 2 and 3 Can be held in contact with the carriage 13 at three points. The cart turning devices 2 and 3 hold the cart 13 in contact with the three points, thereby preventing a change in posture or a positional deviation when the cart 13 is turned.

The embodiment described above can be changed without changing the gist of the present invention.
(1) In this embodiment, the cart turning device is arranged on the downstream side in the transport direction of the cart 13 and the first cart turning device 2 arranged on the upstream side in the transport direction of the cart 13 with the physical distribution passage 4 interposed therebetween. Although it comprised so that it might consist of the 2nd trolley turning apparatus 3, it does not necessarily restrict to this.
For example, the bogie turning device has only one bogie turning device 2 arranged on the upstream side in the transport direction of the bogie 13 by curving and extending the tip of the engagement rail 25 by approximately 90 degrees. It is also possible to cross the physical distribution passage 4 while turning the carriage 13. In this case, a plurality of friction motors 21 may be provided along the engagement rail 25.
(2) In the present embodiment, the guide rollers 14 of the carriage 13 are engaged with the engagement rails 25 and 35 of the carriage turning devices 2 and 3, but the present invention is not limited to this.
For example, the cart turning devices 2 and 3 and the cart 13 can be provided with a latch structure that can be engaged and disengaged.
(3) In the present embodiment, the friction motors 21 and 31 are mounted as the conveying means of the carriage 13, but the present invention is not necessarily limited thereto.
For example, various moving means such as a piston cylinder and a ball screw can be used.

  INDUSTRIAL APPLICABILITY The present invention can be used as a cart transport device that enables stable transport of a cart while having a simple configuration at a location where the track of the cart and a physical distribution passage intersect at the turn-back point of the assembly line.

DESCRIPTION OF SYMBOLS 1 Carriage transfer device 2 1st cart turning device 3 2nd cart turning device 4 Distribution path 12 Rapid feed motor 13 Bogie 14 Guide roller 15 Guide rail 17 Track 21, 31 Friction motor (conveying means)
22, 32 Turning table 24, 34 Turning drive motor (turning means)
25, 35 engagement rail

Claims (4)

A carriage transporting device that transports a plurality of carriages on a track of an assembly line along a long guide rail, and the track crosses a physical distribution passage at a turnaround point of the assembly line,
At the turning point, there is provided a cart turning device including a turning means for turning the cart from the receiving position to the delivery position of the cart while being engaged, and a conveying means for conveying the cart while being engaged. A cart conveying device characterized by the above. In the trolley | bogie conveyance apparatus described in Claim 1,
The bogie turning device includes a first bogie turning device arranged on the upstream side in the carrying direction of the bogie and a second bogie turning device arranged on the downstream side in the carrying direction of the bogie with the physical distribution passage interposed therebetween. The cart conveying device, wherein the delivery position of the first cart turning device and the receiving position of the second cart turning device are arranged adjacent to each other on the physical distribution passage. In the trolley | bogie conveyance apparatus described in Claim 1 or Claim 2,
At least two guide rollers that engage with the guide rails are erected at the lower end of the carriage, and the carriage turning device includes an engagement rail that engages with the guide rollers at the receiving position, The carriage transporting device is characterized in that the carriage can transport the carriage along the engagement rail. In the trolley | bogie conveyance apparatus described in Claim 3,
The cart transport apparatus according to claim 1, wherein the transport means is a friction drive device including a drive roller that is in frictional contact with a side wall of the cart.

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