JP2007302242A - Truck type conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-floor structure of a turntable for changing the direction of a truck in a truck type conveying device having an elevating/lowering object supporting stand to be controlled by a cam rail on a floor side. <P>SOLUTION: A truck type conveying device comprises a conveying truck 1 having a cam driven roller to be vertically moved interlockingly with an elevating/lowering object supporting stand provided below the truck, and a turntable 7 installed at the direction changing position in a traveling path of the conveying truck. The traveling path of the conveying truck 1 includes a section (a high-speed traveling section 3B) in which the object supporting stand travels while being held at the lowered position, and a section (a working section 3A) in which the object supporting stand travels while being held at the elevated position. A cam rail 60T for pushing up the cam driven roller and holding the object supporting stand at the elevated position is installed on the turntable 7. When the conveying truck 1 passes at least over the turntable 7, the object supporting stand is held at the elevated position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a transport carriage provided with an object support base that can be moved up and down controlled by a cam rail on the floor side, and a carriage type transport device provided with a turntable for changing the direction of the transport carriage.

A transport object support table that can be moved up and down between a descending position and a lift position is provided on a transport cart that can travel on a fixed travel route, and is linked to the transport object support table at the bottom of the transport cart. A cam driven roller that moves up and down is provided, and in the travel path of the transport carriage, a section in which the transport object support base is held at the lowered position and the transport object support base is held at the lift position. A cart type transport device provided with a traveling section is well known in the art as disclosed in Patent Document 1 and the like.
JP 2004-331366 A

  In the cart type transport device configured as described above, when a turntable for changing the direction of the transport cart is disposed in the travel path of the transport cart, the transported object is mounted on the transported object support table. Regardless of whether it is present or not, it is configured such that it is placed on the turntable in a state in which the object support base is returned to the lowered position. However, in the configuration in which the bottom of the carriage is provided with a cam driven roller for raising and lowering the transported object support base that moves up and down in conjunction with the transported object support base, when the transported object support base is in the lowered position, The cam follower roller is in a lower position that protrudes greatly downward from the bottom of the carriage, and when the turntable is configured, consideration must be given so that the cam follower roller in the lower position does not interfere with the turntable side. That is, in a configuration in which a pair of left and right guide rails for supporting and guiding the transport carriage is laid on the floor surface, the guide rail for supporting the transport carriage on the turntable is laid at the same level as the guide rail. It is necessary to make the upper surface of the turntable the same level as the floor surface. As a result, the turntable is placed in a pit built by digging under the floor surface, and the equipment cost for changing the direction of the transport cart is very high. In the case of a building structure that cannot be built by digging a pit below the floor surface, it is impossible to employ a direction changing means such as a turntable.

  An object of the present invention is to provide a cart type transport device that can solve the above-mentioned conventional problems. In the present invention described in claim 1, reference numerals of the embodiments described later are used. In addition, cam driven rollers 42a, 42b, and 44 that move up and down in conjunction with the object support base 17 provided on the carriage so as to be movable up and down between the lowered position and the raised position are provided below the carriage. And a turntable 7 installed at a direction changing position in the travel route of the transport cart 1, and the transport object support table is in the lowered position in the travel route of the transport cart 1. A carriage type transport device provided with a section that travels while being held (high-speed traveling section 3B) and a section that travels while the object support base is held at the raised position (work section 3A), On the turntable 7, the cam follower low -44 is pushed up to hold the object support 17 in the raised position, and when the carriage 1 passes at least on the turntable 7, the object support 17 is in the raised position. It has a configuration to be held.

  The work support 17 is lowered to the lowered position between the work section 3A in which the work support 17 is held in the raised position and the turntable 7 located on the lower side of the work section 3A. When a high-speed traveling section 3B is provided for high-speed traveling in a state where the cam is driven, the cam driven rollers 42a, 42b, and 44 are pushed up to a position immediately before the turntable 7 as described in claim 2. Cam rails 59A and 60 for switching the conveyed product support 17 to the raised position may be provided. In other words, when the turntable 7 is disposed immediately after the work section 3A, the transport carriage 1 that has left the work section 3A is held at its transported object support base 17 in the raised position. It can be configured so as to be sent to the travel route on the turntable 7 as it is.

  The turntable 7 connects, for example, a pair of left and right guide rails 64a and 64b and a pair of both guide rails 64a and 64b constituting a conveyance carriage travel route on the turntable 7 as described in claim 3. An intermediate frame 65 to be integrated, a vertical support shaft 66 projecting from the floor side to rotatably support the intermediate frame 65, and attached to the outside of the both guide rails 64a and 64b and supported on the floor side A plurality of supporting rollers 67a to 67d that roll on the surface 74 and motors 68a and 68b that rotationally drive at least one of the supporting rollers 67a to 67d are laid on the turntable 7. The cam rail 60T can be laid on the intermediate frame 65. In this case, as described in claim 4, the support rollers 67a to 67d of the turntable 7 are attached to intermediate positions in the length direction of the both guide rails 64a and 64b, and end portions of the both guide rails 64a and 64b. Is attached with other supporting auxiliary rollers 69a to 69d, and when the transport carriage traveling route on the turntable 7 is connected to the upper-side traveling route or the lower-side traveling route, it is adjacent to the end of the traveling route. Auxiliary support guide surfaces 75 and 76 for leveling the end portion of the guide rail through auxiliary rollers 69a and 69c or 69b and 69d can be provided on the floor side.

  Further, when the transport cart 1 is self-propelled, the transport cart 1 can be self-propelled to enter and exit the turntable 7, but the transport cart 1 is self-propelled. If it is not the case, or if it is a transport carriage 1 that can be switched to a free-running state even if it is of a self-propelled type, the drive means disposed on the travel path side gets on the turntable 7 and The exit from the turntable 7 can also be executed. For example, as described in claim 5, the transport carriage feeding means 81 from the upper travel path to the turntable 7 and the transport carriage delivery means 82 from the turntable 7 to the lower travel path are arranged on the floor side. The floor-side transfer carriage feeding means 81 and the transfer carriage delivery means 82 are disposed on the transfer carriage 1 and are in contact with one of the left and right side surfaces parallel to the traveling direction, and the friction drive wheels 83 and 85 and the other The turntable 7 includes a position where one end of the transport carriage travel path on the turntable 7 is connected to the upper travel path (conveyance carriage receiving position) and the turntable. 7 is configured such that the range between the other end of the transport carriage traveling path on the upper side and the position where the other end of the transport carriage travel path is connected to the lower travel path (conveying carriage delivery position) is driven forward and backward. The friction drive wheel 83 of the feed carriage feeding means 81 is arranged on the floor side on the side where the transport carriage 1 sent onto the turntable 7 moves away by the rotation of the turntable 7, and the friction drive wheel of the feed carriage delivery means 82 is driven. The wheel 85 is disposed on the floor side where the transport carriage 1 on the turntable 7 approaches by the rotation of the turntable 7, and the backup rollers 84 and 86 are respectively connected to the turntable 7 by the rotation of the turntable 7. The upper transport carriage 1 can be configured so as to be retractable from the inside to the outside of the rotation space.

  In the case of adopting the configuration according to claim 5, as described in claim 6, at the end portion of the upper-side travel route (outbound route portion 3) to which the transport carriage travel route on the turntable 7 is connected. Is provided with a normally closed stopper 90 that can be raised and lowered to prevent the carriage carriage from dropping, and cam means (cam rail 94) that interlocks with the back-and-forth movement of the backup roller 84 of the carriage carriage feeding means 81. ) Can be configured to switch the normally closed stopper 90 to the non-operating position in conjunction with the retreating movement of the backup roller 84 of the transport carriage feeding means 81.

  According to the cart type transport device according to the present invention having the above-described configuration, when the transport cart is turned by the turntable, that is, when the transport cart passes at least on the turntable, the material to be transported on the transport cart. The object support is held in the raised position by the cam rail on the turntable. Therefore, the cam driven roller at the bottom of the carriage that moves up and down the transported object support base is also raised. Therefore, a guide rail for supporting and guiding the transport carriage is laid on the floor surface, and the lower position of the cam follower roller at the bottom of the carriage (the position of the cam follower roller when the transported object support base is in the lowered position) is Even when it is configured to be at a low position near the floor, it is not necessary to secure a space for the lower cam driven roller to move on the turntable, and a cam rail that supports the cam driven roller at the upper position is provided. It only needs to be laid. As a result, the turntable is not constructed by laying a pair of left and right guide rails constituting the carriage travel path on the turntable turntable, but the guide rails are connected and integrated with each other inside the turntable. The turntable can be made thin without using the turntable turntable, and a pit into which the turntable turntable fits is provided by digging down the floor as in the past. There is no need, and the equipment cost can be greatly reduced.

  In addition, when the travel path length from the end of the section (work section) in which the transported object support base travels while being held in the raised position to the turntable is sufficient, the configuration according to claim 2 is adopted. Thus, in the section up to the turntable, as in the work section, there is no need to run the transport carriage with the transported object support stand raised to the raised position at a low speed. It is possible to efficiently move the transport cart to increase the operating rate of the transport cart as the entire transport device.

  Moreover, according to the structure of Claim 3, although the turntable for the direction change of a conveyance trolley can be comprised thinly easily, in this case, according to the structure of Claim 4, Even when the rotation radius of the main support roller with respect to the rotation center of the turntable is reduced and the support guide surface on the floor side is composed of a separate plate material laid on the floor, the radius of the separate plate material can be reduced to reduce the cost. In addition, the end of the guide rail on the turntable on the side where the transfer carriage is transferred can be reliably supported at a predetermined level by the auxiliary support guide surface on the floor side, and the transfer of the transfer carriage can be performed safely and smoothly.

  Furthermore, according to the structure of Claim 5, even if it is a conveyance trolley which is not self-propelled, the said conveyance trolley can be transferred between turntables by a friction drive system, but it is required in this case The friction drive wheels and backup rollers, which are the main friction drive means, are not installed on the turntable, but are installed separately on the floor side as the transport carriage feeding means and the transport carriage delivery means, reducing the strength required for the turntable. It can be easily implemented as a thin and light turntable. Further, it is necessary to prevent the friction drive means from getting in the way when the turntable rotates, but according to the configuration of this claim 5, it is only necessary to move the backup roller side having no drive source. The entire structure of the turntable including the transport cart driving means is further simplified and can be implemented at low cost. In addition, a normally closed stopper for stopping the carriage is required at the end of the upper travel path that is not connected to the travel path on the turntable. In this case, according to the configuration of claim 6, As an actuator that automatically switches the normally closed stopper to the non-operating position when the turntable is connected, the backup roller in the conveying carriage feeding means to the turntable can also be used as an actuator for moving out prior to the turntable rotation. In addition, the control can be simplified and the equipment cost can be reduced as compared with the case where an actuator for the normally closed stopper is provided.

  A specific embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a transport carriage that travels on a circulating travel path constituted by a pair of left and right guide rails 2a and 2b. The circulation travel paths are respectively straight and parallel to each other, the forward path part 3 and the backward path part 4, the transverse path parts 5 and 6 between the end parts of both the path parts 3 and 4, and both the path parts 3 and 4 And turntables 7 to 10 for changing the direction of the transport carriage connecting the end portions of the traverse path portions 5 and 6 adjacent to these end portions. In this embodiment, the outbound path section 3 includes a work section that occupies most of the entire length, that is, a work section 3A that travels at a low speed in a continuous state where the front and rear transport carts 1 face each other, and both ends of the work section 3A. High-speed travel section, that is, high-speed travel sections 3B and 3C in which the front and rear transport carts 1 are separated from each other and travel at a high speed. It can also be configured in the same way as the outbound route section 3, and its entire length can be set as a high-speed traveling section.

  Thus, in the work section 3A, a driving drive means 11A for propelling the transport carriage 1 at a constant speed is provided at the entrance, and a braking drive means 11B for sending the transport carriage 1 at a constant speed at the exit. Is provided. In the high-speed traveling sections 3B and 3C, high-speed driving means 11C for propelling the transport carriage 1 at high speed is disposed at intervals equal to or slightly shorter than the entire length of the transport carriage 1, and the end of each high-speed traveling section 3B and 3C. Is provided with variable speed driving means 11D that decelerates and sends the traveling speed of the transport carriage 1 to a constant speed. Further, in each of the traversing path portions 5 and 6, the transport carriage 1 delivered from the upper turntables 7 to 9 is temporarily stopped, and when the lower turntables 8 to 10 are in the transport carriage receiving state, A variable speed driving means 11D for feeding the lower turntables 8 to 10 is provided. Of course, when the path lengths of the traversing path portions 5 and 6 are long, the high-speed driving means 11C is also used. Although the driving means is not shown in the return path section 4, appropriate driving means 11A to 11D are arranged in accordance with the usage form of the return path section.

  Due to the arrangement of the driving means 11A to 11D, the front and rear transport carts 1 are continuously in contact with each other (butting state) in the work section 3A, and the driving means for boosting is provided at the entrance of the work section 3A. All the transport carts 1 in the work section 3A are driven to be driven at a constant speed by the last transport cart 1 driven by 11A. At this time, the braking drive means 11B at the exit of the work section 3A is driven at a lower torque than the drive driving means 11A and slightly lower than the drive speed of the drive driving means 11A. By braking the leading transport carriage 1 in 3A, it is possible to prevent the boosted transport carriage 1 from traveling at a speed equal to or higher than a constant speed due to inertia and generating a gap between the transport carriages 1. The transport cart 1 is sent out one by one at a constant speed. The transport carts 1 in the high-speed travel sections 3B and 3C travel at a high speed with a predetermined interval between the front and rear transport carts 1 and are decelerated to a constant low speed by the terminal variable speed drive means 11D. Sent out.

  Each of the driving means 11A to 11D includes a friction driving means composed of a combination of a friction driving wheel 12 and a backup roller 13 sandwiching the left and right side surfaces (friction driving surfaces) of a rectangular transport carriage 1 having a long planar shape in the traveling direction. It's being used. The friction drive wheel 12 is driven by a motor 14.

  As shown in FIGS. 2 to 4, the transport carriage 1 includes a pair of left and right guide rails 2 a and 2 b that are supported on each of the pair of left and right guide rails 2 a and 2 b that are laid on the floor surface to form the travel paths 3 to 6. Two pairs of front and rear wheels 15 and a pair of left and right vertical shafts sandwiching one steady rest guide rail 2c laid inside the guide rail 2a on one side from the left and right sides in the vicinity of the front and rear wheels 15 The roller 16 is supported so as to be able to go straight along the traveling paths 3 to 6, and is provided with a transported object support base 17 that is movable up and down at the center upper part, and a connecting means 18 for connecting the transport truck 1 immediately before at the front end. It has. This connecting means 18 is provided with a connecting tool 20 which is supported by a horizontal support shaft 19 so that a seesaw motion is supported on the lower side of the front end of the transport carriage 1, and this connecting tool 20 is attached to the rear end thereof. The weight portion 20a and the cam follower roller 20b are provided, and the front end is provided with an engaging portion 20c upward. As shown in FIG. 2C, the rear end side (the weight portion 20a or the like can be used together with a spring). When the latter part of the connector 20 is received by the receiving member 21 on the transport carriage 1 side by the downward urging force acting on the carrier 20 and the connector 20 is in a substantially horizontal connection posture, the locking portion 20c is transported by this It is configured so as to be able to enter the inside of the rear left / right lateral member 1a at the rear end of the transport carriage 1 immediately before coming into contact with the front end of the carriage 1 from the bottom and prevent the preceding transport truck 1 from moving forward. .

  As shown in FIG. 2B, the connecting member 20 has the locking portion 20c lowered against the urging force when the cam driven roller 20b rides on the connecting member releasing cam rail 22 laid on the traveling path side. In this state, the connection portion is switched to the release posture, and the locking portion 20c is released downward from the right and left lateral members 1a at the rear end of the immediately preceding transport carriage 1 to allow the preceding transport carriage 1 to move ahead. become. Thus, as shown in FIG. 1, the connecting member releasing cam rail 22 is disposed at the entrance and exit of the work section 3A, and the cam rail 22 on the entrance side of the work section 3A is connected to the work section 3A. Switch the connecting tool 20 of the transport carriage 1 to enter into the above-described open posture, and allow the front end of the transport carriage 1 to contact the rear end of the last transport carriage 1 that has entered the work section 3A; Thereafter, the locking part 20c of the connecting tool 20 is automatically engaged with the rear left / right lateral member 1a of the immediately preceding transport carriage 1 by returning the connecting tool 20 to the connecting posture, and the cam rail 22 on the exit side of the work section 3A is engaged. Can switch the connecting tool 20 of the rear transport carriage 1 connected to the front transport carriage 1 to be withdrawn from the work section 3A to an open position, and the front transport carriage 1 can be moved forward (rearward movement forward). It is to make.

  Next, the raising / lowering drive means of the to-be-conveyed object support stand 17 on the conveyance trolley 1 is demonstrated in detail based on FIGS. The transported object support base 17 is supported on the lower side of the transported object support base 17 so as to be vertically movable by a cross-link mechanism 23 interposed between the transported support carriage 1 and the transport cart 1. The cross link mechanism 23 is configured by arranging two cross links 24 a and 24 b parallel to the traveling direction in parallel on the lower left and right sides of the object support base 17.

  The pair of left and right cross links 24a and 24b provided in the cross link mechanism 23 is composed of two links 25a and 25b and 26a and 26b whose central crossing portions are pivotally attached to each other by a concentric central fulcrum shaft 27. Among the links 25a to 26b, the front end portions of both the links 25a and 26a that are on the inside are concentric with each other on a pair of left and right bearing members 29 provided on the support frame 28 on the transport carriage 1 side. The rear ends of both links 25a and 26a are connected by a common slide fulcrum shaft 31, and rollers 32 pivoted at both ends of the common slide fulcrum shaft 31 are A pair of left and right front / rear direction slide guides 33 provided below the rear end of the transported object support base 17 are fitted so as to be able to roll in the front / rear direction. The front ends of the two links 25b and 26b, which are outside of the two links 25a to 26b, are provided at positions directly above the pair of left and right bearing members 29 below the front end of the transported object support base 17. The pair of left and right bearing members 34 are pivotally attached to each other by a position fixing fulcrum shaft 35 concentrically with each other. The rear ends of the links 25b and 26b are connected by a common slide fulcrum shaft 36, and Rollers 37 supported on both ends of the common slide fulcrum shaft 36 are moved in the front-rear direction on a pair of left and right front-rear slide guides 38 provided directly below the front-rear direction slide guide 33 on the support frame 28 on the transport carriage 1 side. It is fitted so that it can roll.

  The cross link mechanism 23 is provided with a first operated portion 39 and a second operated portion 40. The first operated portion 39 includes projecting portions 41a and 41b that are continuously provided downward from both the links 25a and 26a that are inside of the two links 25a to 26b that constitute the pair of left and right cross links 24a and 24b. The cam driven rollers 42a and 42b are pivotally supported by the lower and lower horizontal support shafts concentrically with each other. The protrusions 41a and 41b are arranged in a downward direction from a position close to the central fulcrum shaft 27 at an intermediate position between the central fulcrum shaft 27 and the common slide fulcrum shaft 31 of both links 25a and 26a. As shown in FIG. 4, when the object support base 17 is at the lower limit height, the cam driven rollers 42a and 42b are located close to the floor surface.

  The second operated portion 40 is configured by one cam driven roller 44 that is pivotally supported by a toggle link 43 provided side by side with the cross link mechanism 23. The toggle link 43 is formed by connecting a long link 45 and a short link 46 to each other by an intermediate bending fulcrum shaft 47, and each link 45, 46 is a pair of left and right links 45a, 45b and 46a, 46b. The cam driven roller 44 is supported by the intermediate bending fulcrum shaft 47 between the link single units 45a and 45b of the long link 45 which is on the inner side. The toggle link 43 is disposed substantially at the center between the pair of left and right cross links 24a and 24b. The free end of the long link 45 is the center of the inner links 25a and 26a constituting the cross links 24a and 24b. An intermediate member between the fulcrum shaft 27 and the common slide fulcrum shaft 31 is pivotally attached by a shaft-like erection member (support shaft member) 48 that is laid horizontally between the links 25a and 26a. The free end of the short link 46 is pivotally attached to a bearing member 49 provided on the support frame 28 on the transport carriage 1 side by a support shaft 50 positioned below the central fulcrum shaft 27 of the cross links 24a and 24b. .

  Further, as shown in FIGS. 8, 9, and 11, the cross link mechanism 23 is provided with a locking means 51 that locks the transported object support base 17 in the raised position. The locking means 51 uses the common slide fulcrum shaft 36 spanned between the outer links 25b and 26b constituting the cross links 24a and 24b as a locked portion 52, and automatically locks against the locked portion 52. It is provided with a pair of left and right engaging members 53 to be engaged. Each locking tool 53 is positioned between the pair of left and right cam driven rollers 42 a and 42 b of the first operated portion 39 and one cam driven roller 44 of the second operated portion 40 so that the second operated The parts 40 are of the same structure arranged in a left-right distributed state with respect to the part 40, and each is supported by a bearing member 54 provided on the support frame 28 on the transport carriage 1 side by a support shaft 55 that is concentric to the left and right horizontally. A contact member 56 that is pivotally supported so as to swing up and down and is attached to each locking member 53 is held by gravity at a home position where the bearing member 54 receives the contact member 56. In addition, an arm portion 53a is integrally connected downward to each locking member 53, and a cam follower roller 57 is pivotally supported at the lower end of the arm portion 53a via left and right horizontal support shafts that are concentric with each other. . The cam driven roller 57 protrudes downward from the bottom surface of the transport carriage 1.

  The to-be-conveyed object support stand 17 is normally lowered to a lowered position shown in FIG. The height of the object support stand 17 at this time can be determined by a height-adjustable support tool (which is well known in the art and omitted from the drawings) provided upright on the transport carriage 1 side. When the transported object support base 17 is in the lowered position in this way, the pair of left and right cross links 24a and 24b of the cross link mechanism 23 are in the lying down state as shown in FIG. The left and right pair of cam driven rollers 42a and 42b protrudes downward from the bottom surface of the transport carriage 1 by the maximum amount. The cam driven roller 44 of the second operated portion 40 is almost at the same level as the cam driven rollers 42a and 42b of the first operated portion 39, and the toggle link 43 provided with the cam driven roller 44 is The free end fulcrums (the erection member (support shaft member) 48 and the support shaft 50) of the links 45 and 46 are folded so that both are located behind the cam driven roller 44 in the traveling direction of the transport carriage 1. . Therefore, in this state, the cam follower roller 44 cannot be pushed upward to raise the cross links 24a and 24b.

  On the other hand, in the work section 3 </ b> A in the travel route of the transport carriage 1, a cam device 58 for controlling the transported object support base is provided. The cam device 58 includes cam rails 59A, 59B, 60 and 61 described below. More specifically, as shown in FIG. 5, a pair of left and right cam driven rollers 42 a and 42 b of the first operated portion 39 is moved forward at the start end of the work section 3 </ b> A (see FIG. 1). As shown in FIG. 10, a pair of left and right cam driven rollers 42a of the first operated portion 39 is lowered at the end of the work section 3A. , 42b, and a pair of left and right terminal side first cam rails 59B for lowering the cam driven rollers 42a, 42b as the transport carriage 1 moves forward, and further, the terminal end of the starting end side first cam rail 59A. The cam driven roller 44 of the second operated portion 40 is pushed along with the forward travel of the transport carriage 1 in the work section 3A from the vicinity of the portion to the vicinity of the start end portion of the end-side first cam rail 59B. Second cam rail 60 to hold the Gaité predetermined height is laid.

  Thus, when the transport carriage 1 enters the work section 3A, as shown in FIG. 6, the pair of left and right cam driven rollers 42a and 42b of the first operated portion 39 are paired with the left and right starting end side first cam rails 59A. The pair of left and right starting end side first cam rails 59A push up the links 25a and 26a inside the pair of left and right cross links 24a and 24b via the pair of left and right cam driven rollers 42a and 42b. Accordingly, the pair of left and right cross links 24a and 24b move upright in conjunction with each other, and the transported object support base 17 supported by the pair of left and right cross links 24a and 24b moves upward while maintaining a horizontal posture. Will do.

  As shown in FIG. 6, when the pair of left and right cam driven rollers 42a and 42b reach the uppermost flat surface of the pair of left and right starting end side first cam rails 59A, the conveyed object support base 17 has a predetermined intermediate height H1. However, the toggle link 43 changes from the folded state shown in FIG. 5 to a V-shape as the cross links 24a and 24b move up from the lowered position of the transported object support base 17 to the intermediate height H1. The cam follower roller 44 moves slightly rearward at almost the same level, and the free end fulcrum (the erection member (support shaft member) 48 and the support shaft 50) of the toggle link 43 moves relative to the cam follower roller 44. It will be in the state arrange | positioned in the front-back distribution form. Therefore, in this state, by pushing up the cam follower roller 44, the toggle link 43 can be further expanded to cause the cross links 24a, 24b to stand up.

  While the cam driven rollers 42a and 42b roll on the uppermost flat surface of the first end cam rail 59A, the cam driven roller 44 of the second operated portion 40 starts to ride on the second cam rail 60. In addition, a second cam rail 60 is laid. Of course, the starting end side first cam rail 59A is substantially free of the uppermost flat surface, and the cam driven rollers 44 of the second operated portion 40 immediately before the cam driven rollers 42a and 42b are disengaged from the uppermost position of the starting end side first cam rail 59A. May be configured to start riding on the second cam rail 60.

  Thus, when the cam driven roller 44 of the second operated portion 40 rides on the second cam rail 60 as the transport carriage 1 travels, the short link 46 of the toggle link 43 moves upward around the support shaft 50. Since the long link 45 pushes up the cross links 24 a and 24 b via the erection member (support shaft member) 48 and further moves upright, the cam driven roller 44 is moved to the uppermost flat surface of the second cam rail 60. As shown in FIG. 7, the cross links 24a and 24b are completely upright, and the conveyed object support base 17 is raised from the intermediate height H1 to the raised position H2.

  As described above, when the cross links 24a and 24b are erected to raise the conveyed product support base 17, the upper and lower common slide fulcrum shafts 31 and 36 of the pair of left and right cross links 24a and 24b are the rollers 32 and 37, respectively. And the slide guides 33 and 38 slide horizontally forward, but the lower common slide fulcrum shaft 36 (locked portion 52) is locked immediately before the object support 17 reaches the raised position H2. The pair of left and right locking members 53 of the means 51 are passed through the inclined surface on the lower side of the tip while being pushed up, and the transported object support base 17 reaches the lifted position H2, that is, the second operated part 40 When the cam follower roller 44 reaches the uppermost flat surface of the second cam rail 60, the pair of left and right locking members 53 are recessed with respect to the lower common slide fulcrum shaft 36 (locked portion 52). Part 53b is to be fitted engagement by gravity from above. Of course, you may use together the spring which forcibly urges each latching tool 53 downward.

  That is, when the transport carriage 1 enters the work section 3A, the transported object support base 17 that has been in the lowered position is automatically raised to the lifted position H2, and at this time, the locking means of the lock means 51 as described above. 53 automatically engages with the locked portion 52 (the lower common slide fulcrum shaft 36) of the cross links 24a and 24b, and prevents the pair of left and right cross links 24a and 24b from falling down from the standing state. To do. That is, when the conveyed object support base 17 is lowered from the raised position H2, the backward slide of the common slide fulcrum shaft 36 (locked portion 52) of the standing cross links 24a and 24b is changed to the common slide fulcrum. Since the recessed locking portions 53b of both locking tools 53 fitted to the shaft 36 (the locked portion 52) block, the work section 3A for temporarily raising the transferred object support base 17 to the raised position. Even if the toggle link 43 that pivotally supports the cam driven roller 44 pushed up by the second cam rail 60 is bent or broken while the transport carriage 1 is traveling inside, the transported object support base 17 is raised. It can prevent falling from position H2.

  Immediately before the end of the work section 3A, as shown in FIG. 11, an unlocking cam 61 is laid. The unlocking cams 61 are arranged on the left and right sides of the second cam rail 60 so as to correspond to the respective locking members 53 so that the cam driven rollers 57 of the locking devices 53 ride on as the transport carriage 1 travels. Accordingly, the cam follower roller 57 rides on the unlocking cam 61 and the locking tool 53 swings upward against gravity, and the recessed locking part 53b of the locking tool 53 is connected to the cross link 24a, 24b is disengaged upward from the common slide fulcrum shaft 36 (locked portion 52), and the lock on the standing cross links 24a and 24b is released.

  After the unlocking operation, the transport carriage 1 reaches the end portion of the work section 3A, and the cam driven roller 44 of the second operated section 40 moves down the end slope of the second cam rail 60 as the transport carriage 1 travels. Since the part can be lowered, the transported object support base 17 is lowered while causing the cross links 24a and 24b to fall down due to gravity. Thus, as shown in FIG. 10, when the transported object support base 17 reaches the intermediate height H <b> 1 as the transport cart 1 travels, that is, immediately before the cam follower roller 44 moves away from the second cam rail 60. When this happens, the pair of left and right cam driven rollers 42a and 42b of the first operated portion 39 are received by the uppermost flat surface of the pair of left and right terminal side first cam rails 59B. Since the driven rollers 42a and 42b can descend the descending slope portion of the end-side first cam rail 59B, the conveyed object support base 17 further descends from the intermediate height H1 while causing the cross links 24a and 24b to fall down due to gravity. Will do. When the transport carriage 1 exits the work section 3A, the cam driven rollers 42a and 42b are separated from the end-side first cam rail 59B, and the cross links 24a and 24b are completely fallen down so that the transported object support base 17 is in the home position. Will return to the lowered position.

  The cam device 58 can be added with a cam rail 62 for preventing the carriage from rising as shown in FIG. 4B. That is, the transport carriage 1 is located at an appropriate place on the bottom of the transport carriage 1, preferably at a position just below the center of the transported object support base 17 in a side view and two symmetrical positions with respect to the center in the left-right width direction of the transport carriage 1 in a front view. A backup roller 63 is pivotally supported by a horizontal support shaft as close as possible to the bottom of the roller, and a pair of left and right carriage lifting prevention cam rails 62 are installed to cover the pair of left and right backup rollers 63 and prevent the carriage 1 from lifting. be able to. When the carriage support base 17 is pushed up by the first cam rail 59 or the second cam rail 60 as the carriage carriage 1 is driven, the load applied to the carriage support base 17 is limited. In such a case, it is possible to expect an effect of preventing the transport carriage 1 itself from being lifted without the transported object support base 17 being lifted with respect to the transport carriage 1.

  From the above configuration, the transport carriage 1 sent to the work section 3A is in a contact state in which the front end abuts the rear end of the immediately preceding transport carriage 1, and is connected by the connecting means 18, and is supported by the transported object. The carriage 17 travels at a constant speed (low speed) by a boost drive in a state where the platform 17 is raised to the raised position, and is placed on the transported object support platform 17 by an operator who gets on the transport cart 1 during this time. Parts assembling work is performed on the object to be conveyed. Then, the transport object support base 17 is lowered to the lowered position from the top transport cart 1 that has reached the end of the work section 3A, and the connection with the transport cart 1 immediately after that is released by the connecting means 18 of the transport cart 1 immediately thereafter. Then, after being switched to high speed driving, it is separated from the transport carriage 1 immediately after, and exits from the work section 3A. Thereafter, as already described with reference to FIG. 1, the transport carriage 1 is fed onto the turntable 7 by the variable speed driving means 11D. The configuration of the turntable 7 will be described below.

  As shown in FIGS. 1 and 12 to 16, the turntable 7 includes a pair of left and right guide rails 64 a and 64 b constituting the transport carriage travel route on the turntable 7, and both guide rails 64 a and 64 b inside thereof. An intermediate frame 65 to be connected and integrated, a vertical support shaft 66 projecting from the floor to rotatably support the intermediate frame 65, and equidistant from the vertical support shaft 66 outside the guide rails 64 a and 64 b. Support rollers 67a to 67d supported by horizontal support shafts orthogonal to the vertical support shaft 66, and two support devices attached to the outside of the guide rail 64b on one side at two intermediate positions in the rail length direction. Horizontal supports perpendicular to the vertical support shaft 66 are provided on both outer sides of the motors 68a and 68b for rotating the rollers 67c and 67d and the guide rails 64a and 64b. It includes axially supported by the supporting auxiliary rollers 69A～69d, and the guide rails 64a, truck drop-preventing stopper 70a is attached to the intermediate frame 65 between both ends of 64b, 70b provided by. The intermediate frame 65 includes a plurality of connecting members 65a that connect the guide rails 64a and 64b, an oblique reinforcing member 65b installed between these connecting members 65a, and two connecting members 65a at the central position. It is comprised from the bearing board 65c provided with the bearing of the said vertical support shaft 66, and it is comprised so that it may be settled in the height range from the bottom face of the guide rails 64a and 64b. On the intermediate frame 65, when a guide rail 64c for steadying that is connected to the guide rail 2c for steadying of the forward path 3 or the transverse path 5 is laid adjacent to the inside of the guide rail 64a, The second cam rail 60 used in the cam device 58, that is, the same as the second cam rail 60 that pushes up the cam driven roller 44 of the second operated portion 40 and holds the conveyed product support base 17 at the raised position H2. A second cam rail 60T is laid.

  On the floor side of the turntable 7, an annular support plate 71, turntable rotation limiting stoppers 72a and 72b, and auxiliary support plates 73a to 73d are disposed. The annular support plate 71 is laid on the floor surface concentrically with the vertical support shaft 66 in order to form a support guide surface 74 for supporting each of the support rollers 67a to 67d in a rollable manner. As shown in FIG. 12, in the turntable rotation limiting stopper 72a, one end of each of the guide rails 64a and 64b (the end on the side of the dolly stopper 70a) is connected to the guide rails 2a and 2b of the forward path section 3. When this is done, the guide rail 64a is positioned on the floor surface so as to come into contact with the side surface in the vicinity of the end portion on the outward path portion 3 side of one guide rail 64a located on the traverse path portion 5 side. As shown in FIG. 13, in the turntable rotation limiting stopper 72b, the other ends of both guide rails 64a and 64b (the end on the side of the carriage dropping stopper 70b) are connected to the guide rails 2a and 2b of the transverse path portion 5. When projecting, the other guide rail 64b located on the outgoing path portion 3 side is projected on the floor so as to abut on the side surface in the vicinity of the end portion on the transverse path portion 5 side. As shown in FIG. 12, the auxiliary support plates 73a and 73b are used for a pair of left and right supports on the side adjacent to the forward path portion 3 when the rotation of the turntable 7 is restricted by the turntable rotation restriction stopper 72a. Auxiliary support guide surfaces 75 that level up the auxiliary rollers 69a and 69c and level the ends of the guide rails 64a and 64b on the turntable 7 to the same level as the ends of the guide rails 2a and 2b of the forward path section 3 are provided. Are laid separately on the floor surface. As shown in FIG. 13, the auxiliary support plates 73 c and 73 d have a pair of left and right support auxiliary on the side adjacent to the transverse path portion 5 when the rotation of the turntable 7 is restricted by the turntable rotation restriction stopper 72 b. An auxiliary support guide surface 76 for leveling the other ends of the guide rails 64a and 64b on the turntable 7 to the same level as the ends of the guide rails 2a and 2b of the traversing path portion 5 when the rollers 69b and 69d ride on. It is laid on the floor to make up.

  As shown in FIG. 17, the dolly stoppers 70 a and 70 b include a stopper main body 78 whose intermediate position is pivotally supported on a connecting member 65 a of the intermediate frame 65 by a horizontal support shaft 77 parallel to the guide rails 64 a and 64 b, It consists of a cam driven roller 79 pivotally supported on the lower end portion of the stopper main body 78, and is held in the standing action posture shown in FIG. 17B by gravity acting on the cam driven roller 79 side (a spring may be used in combination). The upper end portion of the stopper main body 78 in the standing action posture prevents the transport carriage 1 that has been transferred onto the turntable 7 from dropping from the guide rails 64a and 64b. Thus, on the floor side, as shown in FIG. 12, when the rotation of the turntable 7 is limited by the turntable rotation limiting stopper 72a and as shown in FIG. In each of the cases when the rotation is restricted by the turntable rotation restricting stopper 72b, the cam driven roller 79 rides up and the stopper body 78 retracts to the lower side of the travel path of the transport carriage 1 as shown in FIG. 17A. The cam rails 80a and 80b are laid so as to fall down.

  As is apparent from the above configuration, the turntable 7 is configured so that the support rollers 67c and 67d are driven to rotate forward and reversely by the motors 68a and 68b so that one end of the guide rails 64a and 64b is connected to the guide rail 2a of the forward path section 3. , 2b between the transport carriage receiving position (see FIG. 12) and the transport carriage delivery position (see FIG. 13) where the other ends of the guide rails 64a, 64b are connected to the guide rails 2a, 2b of the transverse path section 5. When the turntable 7 is at the transfer carriage receiving position, the transfer carriage 1 is sent onto the turntable 7 from the forward path section 3, and the turntable 7 is the transfer carriage. When in the delivery position, the transport carriage 1 can be sent from the turntable 7 to the traversing path section 5 but has no self-propelled means. A transport carriage sending means 81 for feeding 1 onto the turntable 7 and a transport carriage sending means 82 for sending the transport carriage 1 from the turntable 7 to the transverse path section 5 are arranged on the floor side. Yes.

  The conveyance carriage feeding means 81 includes a friction drive wheel 83, a backup roller 84, and a friction roller sandwiching the left and right sides of the rear end of the conveyance carriage 1 at a fixed position on the turntable 7 at the conveyance carriage receiving position (see FIG. 12). A motor 83a for driving the drive wheels 83 is provided, and the conveyance carriage delivery means 82 is a friction that sandwiches the left and right side surfaces of the front end of the conveyance carriage 1 at a fixed position on the turntable 7 at the conveyance carriage delivery position (see FIG. 13). A drive wheel 85, a backup roller 86, and a motor 85a for driving the friction drive wheel 85 are provided. Thus, the friction drive wheel 83 of the transport carriage feeding means 81 is disposed on the side where the transport carriage 1 on the turntable 7 moves away due to the rotation of the turntable 7 to the transport carriage delivery position. The friction drive wheel 85 of the delivery means 82 is disposed on the side where the transport carriage 1 on the turntable 7 approaches by the rotation of the turntable 7 to the transport carriage receiving position, and the backup rollers 84 and 86 are respectively The rotation of the turntable 7 is configured so as to be retractable from the inside to the outside of the rotation space of the transport carriage 1 on the turntable 7. That is, like the backup roller 84 on the conveyance carriage feeding means 81 side in FIG. 18A, the backup rollers 84 and 86 are supported so as to reciprocate in parallel with the side surface of the conveyance carriage 1 with which the backup rollers 84 and 86 abut. Further, it is pivotally supported on the tip of a movable table 88 that is reciprocally driven by the cylinder unit 87, and when the movable unit 88 is reciprocated by the cylinder unit 87, the backup rollers 84 and 86 are brought into contact with the side surface of the transport carriage 1. It is possible to switch between the working position that comes into contact and the non-working position that has exited from the rotation space of the transport carriage 1 on the turntable 7 by the rotation of the turntable 7.

  A transport carriage positioning means 89 is provided on the turntable 7 for locking the transport carriage 1 on the turntable 7 to a fixed position on the turntable 7 (see the phantom line in FIGS. 12 and 13). . This transport carriage positioning means 89 is provided with an appropriate locking pin such as a cylinder unit that is detachable with respect to a locked portion provided at an appropriate position on the side surface of the transport carriage 1 stopped at a fixed position on the turntable 7. The actuator may be driven by an actuator, but in order to make the turntable 7 have a low floor structure, it is desirable that the locking pin is driven by a cylinder unit in the horizontal direction.

  At the end of the outbound route section 3 on the turntable 7 side, the transport carriage 1 is connected to the turntable 7 side from the outbound path section 3 in a state where the turntable 7 is not waiting at the transport carriage receiving position shown in FIG. A normally-closed stopper 90 that can be raised and lowered to prevent it from falling off the traveling path portion 3 is provided. As shown in FIG. 18, the normally closed stopper 90 is provided adjacent to the inside of the movable base 88 that moves the backup roller 84 in the transport carriage feeding means 81 to move back and forth. It is supported in an upright posture by gravity (which may be used in combination with a spring) that is pivotally supported so as to freely rise and fall only between the posture and the non-acting posture in which the upper end falls backward and downward. A cam rail 94 that is composed of a stopper main body 92 and that switches the stopper main body 92 to the inclining non-acting posture via a cam driven roller 93 that is pivotally supported by the lower end portion 92 a of the stopper main body 92 is adjacent to the normally closed stopper 90. The movable base 88 is attached. In the cam rail 94, the cylinder unit 87 advances and moves the movable base 88 in a state where the turntable 7 is rotated and returned to the transport carriage receiving position shown in FIG. 18B, the cam follower roller 93 is pushed forward upward in conjunction with the advance movement of the movable base 88, and the stopper main body 92 is switched to the non-falling posture. Therefore, when the backup roller 84 is moved backward by the movable base 88 to rotate the turntable 7, the cam rail 93 is also moved backward from the position just below the cam driven roller 93, and the stopper main body 92 is raised by the biasing force. It is possible to automatically return to the action posture and prevent the carriage 1 from moving from the end of the forward path 3 to the turntable 7 side.

  Further, the turntable 7 includes a turntable positioning means 95 for locking the turntable 7 at the transfer carriage receiving position shown in FIG. 12, and a turntable positioning means for locking the turntable 7 at the transfer carriage delivery position shown in FIG. 96. Both of these turntable positioning means 95 and 96 use positioning locked portions 97a and 97b projecting outward from both ends of one side guide rail 64a on the turntable 7, and the turntable positioning means 95 is 12, a locking tool 95 a that can be freely engaged with and disengaged from the positioning locked portion 97 a of the turntable 1 stopped at the transfer carriage receiving position shown in FIG. 12, and a cylinder unit 95 b that moves the locking tool 95 a back and forth. The turntable positioning means 96 includes a locking tool 96a that can be engaged with and disengaged from the positioning locked portion 97b of the turntable 1 stopped at the transport position shown in FIG. The cylinder unit 96b moves the stopper 96a back and forth. As shown in FIG. 19, the positioning-engaged portions 97a and 97b support a pair of left and right vertical shaft rollers 98b and 98c with an appropriate interval between upper and lower side plates 98a protruding from the guide rail 64a. Therefore, the turntable 7 is configured to be accurately positioned when the thick plate-like locking tools 95a and 96a are inserted between the vertical shaft rollers 98a and 98b.

  The carriage 1 is sent from the end of the outbound path section 3 onto the turntable 7 having the above configuration. As shown in FIG. 1, the end of the outbound path section 3, that is, near the end of the high-speed traveling section 3B. In the same manner as in the case of feeding to the work section 3A, the transported object support base 17 on the transport carriage 1 before being sent to the turntable 7 is switched from the lowered position shown in FIG. 4A to the raised position shown in FIG. 4B. A cam device 99 is provided. This cam device 99 includes a cam device 58 disposed in the work section 3A, that is, the start end side first cam rail 59A and the second cam rail 60 among the cam devices 58 described in detail with reference to FIGS. The transport support 1 is switched to the raised position as the transport cart 1 travels before the transport cart 1 is transferred onto the turntable 7. It is laid only in the area until the support base 17 is switched to the raised position, and is configured such that the transport carriage 1 is sent out to the turntable 7 in a state where the transported object support base 17 is held at the raised position by the lock means 51. is doing.

  According to the above configuration, the turntable 7 returned to the transfer carriage receiving position shown in FIG. 12 is locked to the transfer carriage receiving position by the turntable positioning means 95, and the guide rails 64a and 64b on the turntable 7 side travel. Connected to the guide rails 2a and 2b on the path part 3 side, the carriage stopper stopper 70a on the side adjacent to the forward path part 3 on the turntable 7 is switched to the inclining non-acting posture by the cam rail 80a and further transported. When the backup roller 84 of the carriage feeding means 81 is switched to the advancement action position, and the normally closed stopper 90 at the end of the forward path section 3 is changed to the lodging non-action position as the backup roller 84 advances, the turntable Since the preparation for receiving the transport cart 7 is completed, The carriage 1 that is waiting at the position of the variable speed driving means 11D at the end of the high-speed traveling section 3B or arriving at the position of the variable speed driving means 11D is supported by the cam device 99. In the state where the platform 17 is raised to the raised position and the transported object support platform 17 is held at the raised position by the lock means 51, the variable speed drive means 11D can feed the turntable 7 to the turntable 7 side. Accordingly, by driving the friction drive wheel 83 of the transport carriage feeding means 81 in the carriage feed direction by the motor 83a, the friction drive wheel of the transport carriage feeding means 81 immediately before leaving the variable speed drive means 11D. 83 and the backup roller 84 located at the advancing operation position are continuously driven by friction, and the transport carriage 1 can be transferred onto the guide rails 64 a and 64 b of the turntable 7.

  When the transport carriage 1 is transferred onto the turntable 7, the cam of the second operated portion 40 of the transported object support base 17 that is separated from the cam device 99 (second cam rail 60) and is held at the raised position by the lock means 51. The driven roller 44 is also transferred onto the second cam rail 60T on the turntable 7. In other words, between the terminal end of the cam device 99 (the terminal end of the second cam rail 60) and the second cam rail 60T on the turntable 7, the lock means 51 holds the transported object support base 17 in the raised position. Although the second cam rail 60T corresponding to the second cam rail 60 of the cam device 99 is laid on the turntable 7, the second cam rail 60 of the cam device 99 is sufficiently close to the turntable 7. It is obvious that the second cam rail 60 of the cam device 99 and the second cam rail 60T on the turntable 7 are connected to each other, and thus the lock means 51 can be omitted. Of course, by providing this locking means 51, as in the travel of the transport carriage 1 in the work section 3A, transport is performed while the transported object support base 17 is held at the raised position by the second cam rails 60, 60T. The safety against running the carriage 1 can be improved, and a gap between the second cam rail 60T on the rotating turntable 7 and the second cam rail 60 of the cam device 99 fixed on the floor surface can be provided. Since it becomes possible to make it so large that the cam follower roller 44 falls, a design condition becomes loose and implementation becomes easy. Thus, when the transport carriage 1 transferred onto the turntable 7 is stopped at a fixed position, the transport carriage 1 is locked at the fixed position by the transport carriage positioning means 89.

  Since the transport carriage 1 with the transported object support base 17 held at the raised position is transferred onto the turntable 7, the transported object support base 17 is at the lowered position as shown in FIG. 4A. The cam follower rollers 42a, 42b, 44 for raising and lowering the object support table that protruded greatly below the bottom of the transport carriage 1 protrude above the bottom surface of the transport carriage 1 or slightly below the bottom. Therefore, the second cam rail 60T laid on the turntable 7 is made thinner than the second cam rail 60 laid on the floor surface, and the guide rails 64a and 64b are within the height range. The turntable 7 can be laid on the intermediate frame 65 to be connected without any problem, and there is no adverse effect on the turntable 7 having a low floor structure.

  When the transport carriage 1 is sent to a fixed position on the turntable 7 and is locked by the transport carriage positioning means 89, the locking member 95a of the turntable positioning means 95 is positioned by the cylinder unit 95b on the turntable 1 side. The turntable 7 is unlocked by retreating from the locking portion 97a, and the backup roller 84 of the transport carriage feeding means 81 is switched to the reverse non-operating position by the cylinder unit 87. At this time, the backup roller 86 of the transport carriage delivery means 82 is also switched to the reverse non-acting position as shown in FIG. As a result, when the turntable 7 rotates in a direction away from the turntable rotation restricting stopper 72a of FIG. 12, the transport carriage 1 at a fixed position on the turntable 7 moves the backup roller 84 or the transport of the transport carriage feeding means 81. Since interference with the backup roller 86 of the carriage delivery means 82 is avoided, the two support rollers 67c and 67d provided in the turntable 7 are rotationally driven by the motors 68a and 68b, and the turntable 7 is shown in FIG. In this way, it is rotated 90 degrees to the transport carriage delivery position restricted by the turntable rotation restriction stopper 72b, the orientation of the transport carriage 1 to be mounted is changed by 90 degrees, and the front end of the transport carriage 1 is directed to the transverse path section 5 Can be stopped. During the rotation of the turntable 7, both ends of the travel path (guide rails 64a and 64b) on the turntable 7 are closed by the dolly stoppers 70a and 70b in the standing action posture, and are temporarily transported. Even if a situation occurs in which the transport carriage 1 is not locked at a fixed position due to malfunction of the carriage positioning means 89, the transport carriage 1 is not likely to drop off from the turntable 7 unexpectedly.

  When the turntable 7 is rotated 90 degrees to the delivery position of the transport carriage, as shown in FIG. 13, the locking device 96a of the turntable positioning means 96 is advanced by the cylinder unit 96b and the positioning table on the turntable 1 side is moved. The turntable 7 is locked at the transporting cart delivery position by engaging with the engaging portion 97b, and then the backup roller 86 of the transporting cart delivery means 82 is advanced by the cylinder unit 87 and switched to the operating position. At this time, the dolly stopper 70b on the side adjacent to the traversing path portion 5 on the turntable 7 is switched to the inclining non-operating posture by the cam rail 80b, and the guide rails 64a and 64b on the turntable 7 are traversing paths. Since the carriage 5 is connected to the guide rails 2a and 2b of the section 5, the carriage 1 on the turntable 7 is unlocked by the carriage positioning means 89 on the turntable 7, and the carriage 1 on the turntable 7 is moved forward. It will be in the state which can send out to the part 5 side. Accordingly, the friction drive wheel 85 of the transport carriage delivery means 82 that sandwiches the left and right sides of the front end of the transport carriage 1 on the turntable 7 with the backup roller 86 is rotationally driven by the motor 85a in the delivery carriage delivery direction. Thus, the transport carriage 1 on the turntable 7 can be sent out on the guide rails 2a and 2b of the traversing path portion 5.

  Thus, the transport carriage 1 on the turntable 7 is sent out from the turntable 7 in a state where the transported object support base 17 is held at the raised position by the second cam rail 60T on the turntable 7. When the delivery of the transport carriage 1 is completed, the turntable 7 is unlocked by the turntable positioning means 96 and the backup roller 86 of the transport carriage delivery means 82 is switched to the reverse non-operation position. The two supporting rollers 67c and 67d are reversely driven by the motors 68a and 68b, and the turntable 7 is reversely rotated by 90 degrees to the conveying cart receiving position limited by the turntable rotation limiting stopper 72a as shown in FIG. Thus, it is possible to prepare for the next direction change of the transport carriage 1. When the turntable 7 is reversely driven to the transfer carriage receiving position, since the transfer carriage 1 is not mounted on the turntable 7, the backup roller 84 of the transfer carriage feeding means 81 returns to the advance action position in advance. Even if it is done, the turntable 7 can be rotated and returned to the transport carriage receiving position without any problem.

  When the transport carriage 1 is sent out from the turntable 7 to the transverse path portion 5, the cam driven roller 44 pushed up to the upper position by the second cam rail 60T on the turntable 7 is detached from the second cam rail 60T. The transported object support base 17 is held in the raised position by the action of the lock means 51. The transport carriage 1 is sent to the turntable 8 by the variable speed driving means 11D of the traversing path section 5 when the next turntable 8 for changing the direction of the transport carriage is ready to receive the transport carriage. The turntables 9 and 10 on the lower side of the lower side travel on the lower side where the turntables 8 to 10 receive the transport cart 1 and the turntables 8 to 10 send out the transport cart 1 after the direction change. The structure and operation are the same except that the route is different from the turntable 7 between the outgoing route part 3 and the transverse route part 5 described above. Accordingly, the transport carriage 1 sent to the turntables 8 to 10 is turned 90 degrees by the rotation of the turntables 8 to 10, and the front end is the lower travel path (return path) of each turntable 8 to 10. Part 4, traversing path section 6, and outbound path section 3) while being sent out to the lower-side travel path, via the return path section 4 and traversing path section 6, the start of the outbound path section 3 It can be sent to the department.

  Similar to the turntable 7, the second cam rails 60 </ b> T are also laid on the other turntables 8 to 10. In this case, it is assumed that a cam device 99 for raising the transported object support base 17 of the transport carriage 1 passing therethrough is brought close to the turntable 7 on the upper travel path of the turntable 7. Similarly, the same cam device 99 is disposed close to the turntables 8 to 10 on the upper travel paths of the other turntables 8 to 10, and the lower travel paths of the turntables 7 to 10 are arranged on the lower travel paths. In order to lower the transported object support base 17 of the transport carriage 1 passing through the unlocking cam 60, the end side first cam rail 59B, and the second cam rail 60 of the cam device 58 provided in the work section 3A to the lowered position. The cam device 100 may be disposed close to the turntables 8 to 10, but in the layout of FIG. Without the cam device 100 adjacent to the hand side and the cam device 99 adjacent to the upper side of the turntables 8 and 10, the traverse route portion 5 between the turntables 7 and 8 and the traverse route between the turntables 9 and 10. The part 6 is configured such that the transported object support base 17 on which the cam follower roller 44 is detached from the second cam rails 60T on the turntables 7 and 9 and is about to descend is held by the lock means 51 in the raised position. . Thus, in the transport carriage 1 delivered from the turntables 8 and 10 to the lower side, the transport carriage 1 is operated by the functions of the unlocking cam 60, the terminal end side first cam rail 59 </ b> B, and the second cam rail 60 of the cam device 100. As the vehicle travels, the transported object support base 17 is automatically lowered from the raised position to the lowered position.

  Of course, the turntables 7 and 8 at both ends of the traverse path part 5 between the turntables 7 and 8 and the traverse path part 6 between the turntables 9 and 10 that run while the transported object support base 17 is held in the raised position are provided. It is obvious that the second cam rail 60 may be laid so as to connect the second cam rails 60T. Also, a second cam rail 60 of the cam device 100 for lowering the transported object support base 17 of the transport carriage 1 passing therethrough to a lowered position, and a second cam rail 60T on each turntable 8, 10 adjacent to the upper side thereof. It is also obvious that the cam driven roller 44 can be moved from the second cam rail 60T on the turntables 8 and 10 to the second cam rail 60 of the lower cam device 100 so that the cam driven roller 44 can be transferred. . With this configuration, as described in connection with the cam device 99, the lock unit 51 can function as a simple safety measure, or the lock unit 51 can be omitted.

  With the above-described configuration, the direction change path via the turntables 7 and 8 and the traversing path unit 5 from the end part of the outbound path 3 to the start end part of the outbound path 4, and the outbound path from the end part of the inbound path 4 In the turntables 9 and 10 to the start end of the section 3 and the direction changing path via the traversing path section 6, the transport carriage 1 can travel while holding the transported object support base 17 in the raised position, All the turntables 7 to 10 can be configured in a low floor structure.

  Note that the transported object support base 17 is lowered from the raised position to the lowered position at the end portion of the work section 3A, and is again covered by the cam device 99 at the end section of the high-speed traveling section 3B, that is, at the entrance of the turntable 7. Although the transported object support base 17 is configured to be switched to the raised position, depending on the situation, such as the path length of the high speed traveling section 3B is short, the transported object support base 17 may not be lowered to the lowered position at the end of the work section 3A. It is also possible to configure the transfer carriage 1 to be transferred onto the turntable 7 while holding the transfer object support stand 17 at the raised position. The present invention also applies to a layout in which the transported object is lowered from the transported object support base 17 before the transport cart 1 is transferred to the turntable 7 and the direction of the empty transport cart 1 is changed by the turntable 7. Can be implemented.

FIG. 3 is a partially cutaway plan view showing the entire layout. FIG. A is a schematic partially vertical side view for explaining the overall configuration of the transport carriage, FIG. B is a vertical side view of a main part showing a state before the connecting means is connected, and FIG. C is a connection state of the connecting means. It is a vertical side view of the principal part. It is a schematic top view explaining the whole structure of a conveyance trolley. Fig. A is a rear view of the transport carriage with the transported object support table in the lowered position, and Fig. B is a rear view of the transport cart with the transported object support table in the raised position. It is a vertical side view of the principal part which shows the state just before a to-be-conveyed object support stand begins to raise from a lowered position. It is a vertical side view of the principal part which shows a state when a to-be-conveyed object support stand raises to intermediate height. It is a vertical side view of the principal part which shows a state when the to-be-conveyed object support stand has reached the raised position. It is a vertical rear view in the state of FIG. It is a top view of the principal part which shows a state when a to-be-conveyed object support stand exists in a lowered position. It is a vertical side view of the principal part which shows a state when the to-be-conveyed object support stand is lowered | hung from the raising position to the intermediate height. Fig. A is a vertical side view of the main part showing a state immediately before the object support is unlocked at the raised position, and Fig. B is a state when the object support is unlocked at the raised position. It is a vertical side view of the principal part which shows a state. It is a top view which shows the state which the turntable for a direction change of a conveyance trolley has connected to the upper side travel path. It is a top view which shows the state which the turntable for direction change of a conveyance trolley has connected to the lower side travel path. It is a principal part side view of FIG. It is a front view which shows the turntable main-body part of FIG. It is a front view which shows the turntable main-body part of FIG. 12, and a conveyance trolley feed means. Fig. A is a front view of the main part showing the state where the cart stoppers at both the front and rear ends of the turntable are in the lying down non-operating posture, and Fig. B is the state when the cart stoppers are in the standing action posture. It is a front view of the principal part which shows. Fig. A is a plan view showing the back-and-forth drive mechanism of the back-up roller and the normally-closed stopper for stopping the conveyance cart from the forward path section in the conveying-cart feeding means attached to the turntable, and Fig. B is only the normally-closed stopper. FIG. It is a top view which shows a turntable positioning means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyor carriage 2a, 2b Guide rail 2c Stabilizing guide rail 3 Outbound path part 3A Work area 3B, 3C High-speed traveling area 4 Return path part 5,6 Crossing path part 5,6
7-10 Turntable 11A for changing the direction of the transport carriage Driving drive means 11B Pushing drive means 11C High speed drive means 11D Variable speed drive means 12, 83, 85 Friction drive wheels 13, 84, 86 Backup rollers 14, 83a, 85a Friction drive wheel drive motor 15 Wheel 16 Stabilizing vertical axis roller 17 Liftable movable object support base 18 Connecting means 20 Connecting tool 22 Connecting tool opening cam rail 22b Connecting tool opening cam driven roller 23 Supported object support Cross link mechanisms 24a and 24b for raising and lowering the table Cross links 33 and 38 Slide guide 39 First operated portion 40 Second operated portions 42a and 42b Cam driven roller 43 of first operated portion 43 Toggle link 44 Second operated portion Cam driven roller 51 Locking means 52 of the object to be conveyed support base Locked portion 5 for the locking means 3 Locking means locking tool 57 Locking means locking tool cam driven rollers 58, 99, 100 Conveyance object support base lifting control cam device 59A Start side first cam rail 59B End side first cam rail 60, 60T Second Cam rail 61 Unlocking cam 62 Dolly lift prevention cam rail 63 Dolly lift prevention backup roller 64a, 64b Guide rail 65 on turntable 65 Intermediate frame 66 Turntable rotation center Vertical support shafts 67a-67d Turntable support roller 68a, 68b Turntable drive motors 69a to 69d Turntable support auxiliary rollers 70a, 70b Stopping stopper 71 for the carriages Annular support plates 72a, 72b Stopper rotation limiter stopper 74 Support guide surfaces 75, 76 Auxiliary support guide surfaces 7 Stopper body 79 Cam follower rollers 80a and 80b Cam rail 81 for controlling the stopper for dropping the carriage 81 Conveying carriage feeding means 82 Conveying carriage delivery means 87 Backup roller retracting drive cylinder unit 88 Movable carriage 89 Conveying carriage positioning means 90 Normally closed stopper 92 Stopper body 93 Cam driven roller 94 Cam rails 95, 96 for controlling normally closed stoppers Turntable positioning means 95a, 96a Locking tools 95b, 96b Locking tool retracting drive cylinder units 97a, 97b Positioned locked parts

Claims (6)

  A transport carriage having a cam driven roller that moves up and down in conjunction with a supported object support base provided on the carriage so as to be able to move up and down between a lowered position and an elevated position, and a travel route of the transport carriage A turntable installed at a direction change position, and in the travel route of the transport carriage, a section in which the transported object support table travels while being held at the lowered position, and the transported object support table rises. A carriage-type transport device provided with a section that travels while being held at a position, and a cam rail that pushes up the cam driven roller to hold the transported object support base at a raised position on the turntable. When the transport carriage passes at least on the turntable, the transport object support table is held at the raised position.   Between the work section in which the transported object support table is held in the raised position and the turntable located on the lower side of the work section, the transported object support table is lowered to the lowered position and the high speed 2. The carriage type according to claim 1, wherein a high-speed traveling section for traveling is provided, and a cam rail that pushes up the cam follower roller and switches the transported object support base to a raised position at a position immediately before the turntable. Conveying device.   The turntable includes a pair of left and right guide rails that constitute a traveling route of the transport carriage on the turntable, an intermediate frame that connects and integrates both the guide rails on the inside thereof, and for rotatably supporting the intermediate frame. A vertical support shaft projecting from the floor side, a plurality of support rollers attached to the outside of the both guide rails and rolling on the support guide surface on the floor side, and at least one of these support rollers; The cart-type transfer device according to claim 1 or 2, comprising a motor that rotates, and the cam rail on the turntable is laid on the intermediate frame.   The support roller of the turntable is attached at an intermediate position in the length direction of both guide rails, and another auxiliary support roller is attached to the end portions of both guide rails. An auxiliary support guide surface is provided on the floor side for leveling the end of the guide rail through the support auxiliary roller adjacent to the end of the travel path when connected to the upper travel path or the lower travel path. The trolley | bogie type conveying apparatus of Claim 3 which is.   A conveying cart sending means from the upper side travel path onto the turntable and a conveying cart sending means from the turntable to the lower side running path are arranged on the floor side. The cart delivery means is composed of a friction drive wheel that is in pressure contact with one of the left and right sides parallel to the traveling direction provided in the transport cart and a backup roller that is in contact with the other, and the turntable is transported on the turntable. The range between the position where one end of the cart travel path is connected to the upper side travel path and the position where the other end of the transport cart travel path on the turntable is connected to the lower side travel path is driven to rotate forward and backward. The friction drive wheels of the carriage feeding means are arranged on the floor side on the side where the conveyance carriage sent onto the turntable moves away by the rotation of the turntable. The friction drive wheels of the transport carriage delivery means are arranged on the floor side where the transport carriage on the turntable approaches by the turntable rotation, and each backup roller is on the turntable by the turntable rotation. The trolley | bogie type conveying apparatus of any one of Claims 1-4 comprised so that retraction | suction was possible from the inner side to the outer side of the rotation space of a conveyance trolley | bogie.   At the end of the upper-side travel path to which the transport carriage travel path on the turntable is connected, an up and down normally closed stopper for preventing the transport carriage from falling is provided, and the backup roller of the transport carriage feeding means moves back and forth. 6. The cam means is provided in conjunction with the movement carriage, and the cam means is configured to switch the normally closed stopper to a non-operating position in conjunction with the retreating movement of the backup roller of the transport carriage feeding means. Trolley type transport device.

Images