JP4941826B2 - Carriage transfer device - Google Patents

Description

  The present invention relates to a cart-type transport apparatus including a transportable object support base that can be moved up and down controlled by a cam rail on the floor side.

On this kind of cart type transport device, that is, a transport cart that can travel on a fixed travel route, a transported object support base is supported by a cross link mechanism so as to be able to move up and down, and at the bottom of the transport cart, the cross A lift-type cam driven roller that moves up and down in conjunction with the undulation movement of the link mechanism is provided, and in the travel path of the transfer carriage, a cart-type transfer device provided with a cam rail that pushes up the lift-down cam driven roller is: Conventionally known as disclosed in Patent Document 1 and the like.
Japanese Patent Laid-Open No. 2006-62805

  In the cart type transport device configured as described above, when the transported object support base on which the transported object is loaded is located at a position higher than the lower limit position, that is, the cam driven roller causes the cross link mechanism to stand up by the cam rail. The upward reaction force acting on the fulcrum (non-slide link end and slide link end) of the cross-link mechanism on the transport carriage side in order to stabilize the transported object support base at a predetermined height. The weight of the transport cart must win (buoyancy). In other words, when the weight of the transported object loaded on the transported object support base increases, the upward reaction force (buoyancy) acting on the fulcrum on the transport cart side of the cross link mechanism becomes larger than the weight of the transport cart. Then, the transport carriage itself rises and changes the cross link mechanism to the lying posture. As can be seen from the above, in the cart type transport device having the above-described configuration, the weight of the transport cart itself must be sufficiently increased in order to be able to transport a heavy object to be transported. Therefore, an urging means for urging the object support table in the upward direction is provided, and the urging force of the urging means is used to support the object to be conveyed when the object to be conveyed is not mounted on the object support table. Although the table is moved up, it is considered that when the object to be conveyed is mounted on the object support table, the strength is set to allow the object object support table to be lowered by the load.

  However, when the urging means as described above is also provided, the transported object on which the transported object is not mounted in order to reduce the bulk of the transport cart and increase the loading efficiency on the truck, such as when transporting the transport cart. When trying to stabilize the support base in the lowered position (downward limit position or a position close to it), the object support base lowered against the urging force must be fastened with a wire rope or the like. Even if such effort is taken, when the wire rope is unwound, the transferred object support base jumps up vigorously by the urging force of the urging means, which is very dangerous. Further, as the rising angle of the cross link mechanism becomes smaller, the urging force that the urging means pushes the conveyed object support table directly upward becomes smaller, and when the conveyed object support table reaches the lowered position, the conveyed object Although it is possible to configure the weight of the support base to exceed the biasing force, the transported object support base at the lowered position is very unstable, and the transported object support base is lifted up only slightly. The object support base jumps up vigorously by the urging force, and the danger cannot be avoided.

  An object of the present invention is to provide a cart-type transfer device that can solve the above-described conventional problems, and the means thereof is indicated by reference numerals of embodiments to be described later. In the first aspect of the invention, the transported object support base 11 is supported on the transport carriage 1 that can travel on a fixed travel path so as to be able to move up and down, and is moved up and down in conjunction with the lifting movement of the transported object support base 11. Elevating cam driven rollers 30a, 30b, 32 are provided, and elevating cam rails 50, 52 for pushing up the elevating cam driven rollers 30a, 30b, 32 are provided in the traveling path of the transport carriage 1, A biasing means 45 for biasing the transported object support base 11 in the upward direction is provided, and this biasing means 45 supports the transported object when the transported object W is not mounted on the transported object support base 11. The base 11 is moved up However, when the object to be conveyed W is mounted on the object to be conveyed support 11, it is a cart type conveying apparatus configured to allow the object to be conveyed support 11 to be lowered due to the load. A detachable jig 60 is provided for holding the object support table 11 in the lowered position against the urging force of the urging means 45, and the jig 60 is subjected to a force applied by the urging force in accordance with the rotation operation amount. An operation screw member (operation nut 63) that allows the transported object support table 11 to move up is provided.

  According to the second aspect of the present invention, the transported object support base 11 is supported on the transport carriage 1 capable of traveling on a fixed travel path so as to be lifted and lowered, and interlocked with the lifting motion of the transported object support base 11. Elevating cam driven rollers 30a, 30b, 32 that move up and down are provided, and elevating cam rails 50, 52 that push up the elevating cam driven rollers 30a, 30b, 32 are provided in the travel path of the transport carriage 1. The urging means 45 for urging the conveyed object support base 11 in the upward direction is provided, and the urging force of the urging means 45 is not mounted on the conveyed object support base 11. When the transported object W is mounted on the transported object support base 11, the transported object support base 11 is moved to a strength that allows the transported object support base 11 to be lowered by the load. Set cart type transport equipment A jig 60 is provided for holding the transported object support base 11 in the lowered position against the urging force of the urging means 45. The jig 60 corresponds to the amount of rotation operation. An operation screw member (operation nut 63) that allows the object support table 11 to be lifted by an urging force is provided, and the operation screw member ( In a state where the operation nut 63) is present, the transported object support base 11 can be moved up and down freely within the range below the ascending limit position.

In carrying out the present invention having the configuration described in claim 1 or 2, specifically, as shown in claim 3, the transported object support base 11 includes a pair of left and right cross links 12a and 12b. The pair of left and right cross links 12a and 12b is supported by a central fulcrum shaft 15 having a concentric central fulcrum shaft 15. Links 13a, 13b and 14a, 14b. One end of each of the two links 13a-14b swings up and down by means of position fixing fulcrum shafts 18, 23 concentric with the transport carriage 1 and the transport object support base 11, respectively. The slide link ends that are freely pivoted, and the slide link ends on the other end side of the two links 13a to 14b are respectively provided on the transport carriage 1 and the transport object support base 11 so as to be slidable in the horizontal direction. Are vertically swingably supported around an axis 19, 24, the jig 60 is the common slide fulcrum shaft 1 9 connecting the pair of left and right crosslinks 12a, the slide link ends each other in the conveyance carriage 1 side of 12b a screw shaft 61 which is connected, a supporting member 62 in which the screw shaft 61 provided on the conveyance carriage 1 away from the conveyed object support table 11 is penetrations, the screw shaft 61 penetrating the support member 62 It can be set as the structure provided with the operation nut 63 screwed to the free end side.

  When the configuration described in claim 3 is adopted, as described in claim 4, a cylindrical body 64 is loosely fitted to the common slide fulcrum shaft 19 so as to be rotatable, and the cylindrical body 64 and the support are supported. An intermediate rod-like member 66 disposed in parallel with the cylindrical body 64 at an intermediate position with respect to the member 62 and the cylindrical body 64 are connected by connecting rods 65a and 65b at two axial positions of the cylindrical body 64. The screw shaft 61 has an inner end attached to the intermediate rod-like member 66 at an intermediate position between the two connecting rods 65a and 65b, and the support member 62 is a bearing member provided upright on the transport carriage 1 side. 73 can be rotatably supported around a support shaft 62 b parallel to the cylindrical body 64. Further, when the configuration according to claim 3 or 4 is employed, the axial direction of the screw shaft 61 with respect to the support member 62 can be reduced by loosening or removing the operation nut 63 as described in claim 5. It can comprise so that the to-be-conveyed object support stand 11 can be raised / lowered with a movement. Further, according to a sixth aspect of the present invention, the cylindrical body 64 is provided with a connecting rod coupling portion 64a for detachably coupling the two connecting rods 65a and 65b, and the bearing member 73 is formed of the transport carriage 1. Can be detachably attached.

  In addition, as described in claim 7, the urging force of the urging means 45 can move the transported object support base 11 on which the transported object W is not mounted from the descending limit position to the ascending limit position. In this case, as shown in claim 8, the urging means 45 is configured such that the object support table 11 on which the object W is not mounted is at the lower limit. A main urging means 45 for moving the transported object support base 11 up to the ascending limit position when the transported object support base 11 is moved up to a predetermined height from the position, and a transported object support on which the transported object W is not mounted. Sub-bias means 53 for moving the table 11 upward from the lower limit position to the predetermined height position can be configured.

  According to the cart type transfer device having the above-described configuration, the empty transfer object support base on which the transfer object is not mounted is in the ascending limit position by the urging force of the urging means. This is performed on the object support table at the ascending limit position. At this time, if it is inconvenient for the transported object support base to drop due to the load, a cam rail for pushing the transported object support base to the ascending limit position via the lift cam follower roller in this transported object loading zone. What is necessary is just to lay or to incorporate the automatic lock means which hold | maintains a to-be-conveyed object support stand in a raise limit position. The height of the carrier support base when the carriage is running in a work zone that starts from the workpiece loading zone and assembles parts to the loaded carrier, etc. is raised and lowered by the cam cam roller for raising and lowering. By pushing up to the required height, it is possible to obtain a height suitable for work on the loaded object. In other words, in the zone where the cam rail is not laid, the transported object support base on which the transported object is loaded falls to the lower limit position where the load of the transported object overcomes the biasing force of the biasing means, In the zone where the cam rail is laid, the vehicle is driven in a state where the cam rail is pushed up to a height corresponding to the push-up height of the raising / lowering cam follower roller by the cam rail, an ascending limit position, or any lower height. Become.

  Thus, since the object support base is urged in the upward direction by the urging means as described above, the load applied in the state where the object is loaded can be reduced by the upward urging force. Therefore, if it is a conventional cart-type transport device that does not include this urging means, that is, a conventional cart-type transport device that supports the transported object support table through a cross-link mechanism, the load load Therefore, even if the upward reaction force (buoyancy) acting on the fulcrum of the cross link mechanism on the conveyance carriage side becomes larger than the weight of the conveyance carriage, the load load is reduced. Thus, it is possible to suppress the buoyancy from acting on the transport carriage and to reliably hold the transported object support base at a predetermined height or to raise it to a predetermined height. In other words, it is possible to increase the maximum weight of the object to be transported while configuring the transport carriage itself to be relatively light and small. Furthermore, since the load applied to the lift cam follower roller can be reduced, the surface pressure applied to the roller can be reduced, and the diameter of the lift cam follower roller can be reduced. It is convenient to construct a floor structure.

  Moreover, according to the first aspect of the present invention, the transported object support table is held at the lowered position against the urging force of the urging means, for example, when the conveying cart is transported by a truck, thereby reducing the bulk. When necessary, a jig can be set to hold the transferred object support table in the lowered position, and after the transfer carriage is installed on the transfer path, the transferred object support table is returned to a state where it can be moved up and down. When this is done, the operation screw member of the jig can be rotated so that the object support base can be gradually raised by the urging force, so that the object support base lowered to the lowered position as in the prior art. The time-consuming and dangerous work of fastening the wire with the wire rope is unnecessary, and the work of returning the object support base to the usable state can be performed extremely safely. In particular, in the present invention described in claim 1, since a jig for holding the object support base in the lowered position is detachable, the jig is installed after the conveyance carriage is installed on the conveyance path. Compared to the case where the above jig is attached to all transport carts that need to hold the transported object support base in the lowered position, and can be reused for transportation of other transport carts. Economical.

  According to the second aspect of the present invention, as compared with the case where the configuration according to the first aspect is adopted, all the transport carts that need to hold the transported object support base in the lowered position are provided. Although it is necessary to attach and configure the jig, there is no need to remove the jig after storing the conveyance carriage on the conveyance path, and to save and store the removed jig.

It should be noted that the present invention is applied to a transport carriage of this type of general configuration in which the object support base is supported on the transport carriage by a cross link mechanism having a pair of left and right cross links. In the case of carrying out, according to the configuration of the third aspect, since the operation nut serving as the operation screw member of the jig is located on the transport carriage separated from the transport target support base, the transport target support base The operation of releasing the holding at the lowered position, that is, the screw return operation of the operation screw member (operation nut) can be performed easily and easily. In this case, according to the fourth aspect of the present invention, the inclination angle of the screw shaft can be changed as the object support base is moved up and down, so that the operation nut screwed onto the screw shaft can be conveyed. The position (height) on the carriage can be set so that it can be easily operated, and the slide link ends of the pair of left and right cross links that support the object support table on the object support table side are connected. The stress is not concentrated at one central portion of the common slide fulcrum shaft, and the common slide fulcrum shaft does not need to be particularly thick for incorporating the jig in the present invention. In other words, the present invention can be easily implemented by using the common slide fulcrum shaft as it is in a conventional cart-type transport device that supports the transported object support table so as to be movable up and down by a pair of left and right cross links.

  In addition, when adopting the configuration according to claim 3 or 4, according to the configuration according to claim 5, the object to be conveyed can be obtained by loosening or removing the operation nut without particularly removing the jig. Since the support table can be moved up and down, a test operation of the transport carriage is performed without removing the jig, and as a result, the object support table is held again at the lowered position by the jig and the transfer path is It becomes possible to carry it out.

  In addition, according to the configuration of the seventh aspect, it is possible to reliably start to raise the object support base by the urging force of the urging means simply by rotating the operation screw member of the jig. Since an auxiliary operation for assisting the start of ascent of the conveyed product support base is unnecessary, handling is easy. In this case, according to the configuration described in claim 8, the configuration described in claim 7 can be easily implemented.

  First, a specific example of a state before attaching a jig according to the present invention will be described with reference to the accompanying drawings. In FIGS. 1 and 2, 1 is a transport carriage, and left and right laid on a floor surface. Traveling on a travel path composed of a pair of supporting guide rails 2a and 2b and a single attitude regulating guide rail 3 laid close to and parallel to the guide rails 2a and 2b on one side To do. The travel drive means for traveling the transport carriage 1 is not particularly limited, but in this embodiment, as shown by the phantom line in FIG. 2, the travel drive means is on one side parallel to the travel direction of the transport carriage 1. Between the friction drive wheel 4 pressed against the friction drive surface 1a extending over the entire length of the formed carriage and the backup surface 1b formed on the other side parallel to the traveling direction of the transport carriage 1 and between the friction drive wheels 4 A friction drive type driving means 7 comprising a backup roller 5 sandwiching the transport carriage 1 and a motor 6 for rotationally driving the friction drive wheel 4 is disposed at an appropriate position in the travel path.

  The transport carriage 1 includes a pair of left and right pair of front and rear wheels 8 that roll on a pair of left and right support guide rails 2a and 2b (wheels that do not have a flange that engages with the guide rails 2a and 2b), and posture regulation. Four vertical axis rollers 9 a to 9 d that engage with the guide rail 3 are provided. In this embodiment, as shown also in FIG. 5, the posture regulating guide rail 3 is composed of a pair of left and right rail members 3a and 3b, and each of the vertical axis rollers 9a to 9d is between the pair of left and right rail members 3a and 3b. Although the structure which loosely fits is employ | adopted, the structure which pinches | interposes one vertical plate-shaped rail material with a pair of left and right vertical axis | shaft rollers may be sufficient. In any case, as shown in FIG. 5, the four vertical axis rollers 9 a to 9 d protrude downward from the bottom surface of the transport carriage 1, but the transport carriage support level L on the travel path side, that is, a pair of left and right In the state where the vertical axis rollers 9a and 9d at both front and rear ends are positioned at both front and rear ends of the transport carriage 1, which are positioned above the transport carriage support level L at the same level as the wheel support surfaces of the support guide rails 2a and 2b. They are arranged at approximately equal intervals.

  On the transport carriage 1, there is provided a transported object support base 11 that is supported at a substantially central position via a cross link mechanism 10 so as to be movable up and down. Hereinafter, the cross-link mechanism 10 will be described in detail with reference to FIGS. 3 to 6. The cross-link mechanism 10 has two cross-links 12 a and 12 b parallel to the traveling direction arranged in parallel on the lower left and right sides of the transported object support base 11. It is composed.

The pair of left and right cross links 12a and 12b provided in the cross link mechanism 10 is composed of two links 13a and 13b and 14a and 14b whose central crossing portions are pivotally attached to each other by a concentric central fulcrum shaft 15. Among the links 13a to 14b, the front end portions of both the links 13a and 14a which are on the inner side are a pair of left and right bearing members 17 provided on the support frame 16 on the transport carriage 1 side and are concentric with each other. vertically swingably pivoted by the rear ends of the both links 13a, 14a, as well are connected by a common slide fulcrum shaft 24, the common slide fulcrum shaft rollers 25 which are rotatably supported at both ends of 24, A pair of left and right front / rear direction slide guides 26 provided below the rear end of the transported object support base 11 are fitted to be able to roll in the front / rear direction. The front end portions of the two links 13b and 14b which are outside of the two links 13a to 14b are provided at positions directly above the pair of left and right bearing members 17 below the front end portion of the transported object support base 11. The pair of left and right bearing members 22 are pivotally attached to each other by a position fixing fulcrum shaft 23 concentric with each other. The rear ends of the links 13b and 14b are connected by a common slide fulcrum shaft 19 , and The rollers 20 supported on both ends of the common slide fulcrum shaft 19 are moved in the front-rear direction on a pair of left and right front-rear slide guides 21 provided on the support frame 16 on the transport carriage 1 side and immediately below the front-rear direction slide guide 26. It is fitted so that it can roll.

In the cross link mechanism 10, a pair of left and right first cam driven rollers 30a and 30b and one second cam driven roller 32 are incorporated as lifting cam driven rollers. The first cam follower rollers 30a and 30b are projecting portions 29a and 29b that are continuously provided downward from the inner links 13a and 14a of the two links 13a to 14b constituting the pair of left and right cross links 12a and 12b. Are supported on the lower end of the shaft concentrically. The protrusions 29a and 29b are continuously provided downward from a position close to the central fulcrum shaft 15 of the inner links 13a and 14a . As shown in FIG. The cam driven rollers 30 a and 30 b are configured to protrude downward from the transport carriage 1.

  The second cam driven roller 32 is pivotally supported by a toggle link 31 provided in the cross link mechanism 10. That is, the toggle link 31 is formed by connecting a long link 33 and a short link 34 with an intermediate bending fulcrum shaft 35, and each link 33, 34 is composed of a pair of left and right links. The two-cam driven roller 32 is pivotally supported by the intermediate bending fulcrum shaft 35 between the single links of the long link 33 on the inner side. The toggle link 31 is arranged at the approximate center between the pair of left and right cross links 12a and 12b. The free end of the long link 33 is the central fulcrum of the inner links 13a and 14a constituting the cross links 12a and 12b. The shaft 15 is pivotally attached by a shaft-like erection member (support shaft member) 36 that is laid horizontally between the inner links 13a and 14a at a position slightly closer to the common slide fulcrum shaft 19 than the shaft 15. The free end of the short link 34 is pivotally attached to a bearing member 37 provided on the support frame 16 on the transport carriage 1 side by a support shaft 38 positioned below the central fulcrum shaft 15 of the cross links 12a and 12b. .

The cross link mechanism 10 is also provided with an automatic locking means 39 for locking the object support 11 that has been raised to the ascending limit position. The automatic locking means 39 uses the common slide fulcrum shaft 19 installed between the outer links 13b and 14b constituting the cross links 12a and 12b as a locked portion 40, and It is provided with a pair of left and right locking tools 41 that are automatically engaged. Each locking tool 41 is arranged in a left-right distributed state with respect to the second cam driven roller 32 so as to be positioned between the pair of left and right first cam driven rollers 30a, 30b and one second cam driven roller 32. Each of which has the same structure and is supported by a bearing member 42 provided on the support frame 16 on the transport carriage 1 side so as to be swingable up and down by support shafts 43 that are concentric with each other horizontally and horizontally. The locking tool 41 is held by gravity at a locking position where the locking tool 41 extends horizontally backward from the support shaft 43. In addition, an arm portion 41a is integrally connected downward to each locking member 41, and an unlocking cam follower roller 44 is pivotally supported at the lower end of the arm portion 41a via left and right horizontal support shafts that are concentric with each other. Has been. The unlocking cam follower roller 44 is located below the bottom surface of the transport carriage 1 and above the transport carriage support level L when the locking tool 41 is in the locking position.

  The transported object support base 11 is urged in the upward direction by the urging means 45. As shown in FIGS. 4 to 6, the urging means 45 includes a plurality of urging units 46 arranged in parallel at appropriate intervals in the horizontal direction and in the horizontal direction in the lower space of the transported object support base 11. It is composed of Each urging unit 46 is composed of a pulling shaft rod 47 and a compression coil spring 48 fitted on the pulling shaft rod 47. Each of the pulling shaft rods 47 has an ascending limit as shown in FIG. A support member 49 fixedly projecting in parallel with the common slide fulcrum shaft 24 on the lower side of the transported object support base 11 at a position adjacent to the common slide fulcrum shaft 24 at the position is provided on the common slide fulcrum shaft 24. The one end is fixedly connected to a rotating body 47a that is externally fitted to the common slide fulcrum shaft 24 so as to be rotatable around its axis, and the other end side is A spring receiver 47b whose axial position is adjustable is provided. Thus, each compression coil spring 48 is fitted on the tension shaft 47 between the support member 49 and the spring receiver 47 b, and the initial compression stress of each compression coil spring 48 is passed through the tension shaft 47. The common slide fulcrum shaft 24 is configured to be moved in a direction in which the transported object support base 11 is raised (a direction in which the fixed slide fulcrum shaft 23 approaches).

As described above, the object support base 11 is urged in the upward direction by the incorporation of the urging means 45, and the urging force is applied to the empty object support base 11 on which no object is loaded. 4, that is, the locking tool 41 of the automatic locking means 39 locks the locked portion 40 of the common slide fulcrum shaft 19 on the transport carriage 1 side (support frame 16 side) in the cross link mechanism 10. However, when the weight of the object to be conveyed changes due to the work on the object to be conveyed in the work zone, the minimum weight When the transported object in the state is loaded, the transported object support base 11 is set so as to descend against the biasing force of the biasing means 45 due to the load applied to the transported object support base 11. Yes.

According to the above configuration, when the object to be conveyed is not stacked on the object support base 11, the object support base 11 stands up by the urging force of the urging means 45 as shown in FIG. 4. The cross link mechanism 10 is pushed up to the ascending limit position. At this time, the common slide fulcrum shaft 19 on the support frame 16 side in the cross link mechanism 10 slides horizontally toward the position fixed fulcrum shaft 18 side, but the common slide fulcrum immediately before the transported object support base 11 reaches the ascent end position. When the locked portion 40 of the shaft 19 passes through the locking device 41 of the automatic locking means 39 while pushing up against the gravity, and the conveyed object support base 11 reaches the ascent limit position, the locking device 41 is It swings back downward and automatically engages with the locked portion 40 of the common slide fulcrum shaft 19 . That is, the transported object support base 11 is automatically locked at the ascending limit position. In this state, as shown in FIGS. 4 and 5, the pair of left and right first cam driven rollers 30 a and 30 b are raised to a position slightly above the bottom surface of the transport carriage 1, and one second cam driven roller 32 is Although it is a position that protrudes slightly below the bottom surface of the transport carriage 1, it is raised to a position above the transport carriage support level L.

  When the transport carriage 1 in the state where the transport object support base 11 is locked at the ascent end position as described above arrives at the entrance of the work zone set in the travel route, the transport object support base at the ascent end position is reached. 11 to load the object to be transported. At this time, the lowering of the transported object support base 11 by the weight of the transported object is prevented by the locking tool 41 of the automatic lock means 39. The transport cart 1 on which the transported object is loaded on the transported object supporting table 11 at the ascending limit position is entered into the work zone, and a predetermined work is performed on the loaded transported object. Accordingly, when it is necessary to lower the level of the conveyed object from the ascending limit position, as shown in the phantom line of FIG. 5 and FIG. 7, the cam rail that can receive the second cam driven roller 32 in the ascending position, in other words Then, the center cam rail 50 having a height capable of pushing up the conveyed product support base 11 to the ascending limit position, and the cam of the automatic lock means 39 in a state where the center cam rail 50 can support the second cam driven roller 32. An unlocking cam rail 51 that pushes up the driven roller 44 is laid on the traveling path floor side.

As the transport carriage 1 travels, the second cam driven roller 32 in the raised position first moves to the upper side of the center cam rail 50, and then the unlocking cam driven roller 44 of the automatic locking means 39 is for unlocking. The locking device 41 rides on the cam rail 51 and is pushed upward from the locking position against gravity, and the locking device 41 is moved to the common slide fulcrum shaft 19 (locked portion 40 on the support frame 16 side of the cross link mechanism 10). ) From above, and the lock to the transported object support base 11 at the ascending limit position is released. From this moment, the second cam follower roller 32 is supported at substantially the same level by the center cam rail 50 immediately below, so that the transported object support base 11 remains substantially held at the ascending limit position. As the transport carriage 1 travels, the second cam driven roller 32 moves to the descending slope portion 50a (see FIGS. 7 and 8) of the center cam rail 50, so that the transported object support base 11 is cross-linked by the load. The mechanism 10 is lowered in parallel while being pushed down to the lying posture.

  The pair of left and right cross links 12a and 12b in the cross link mechanism 10 are rotated relative to each other around the center fulcrum shaft 15 and fall from the standing posture toward the horizontal posture as the transported object support base 11 is lowered. However, the lower limit of the transported object support base 11 by the descending slope portion 50a of the center cam rail 50 is that the short link 34 of the toggle link 31 whose posture changes with the overturning motion of the cross links 12a and 12b. It is when it becomes a vertical posture. At this time, the descending amount of the second cam follower roller 32 becomes the maximum, the closest to the floor surface of the travel route, and away from the end of the descending slope portion 50a of the center cam rail 50. On the other hand, the pair of left and right first cam driven rollers 30 a and 30 b also descend with the falling movement of the cross links 12 a and 12 b, and protrude downward from the bottom surface of the transport carriage 1. Accordingly, before the second cam driven roller 32 moves away from the terminal end of the descending slope portion 50a of the center cam rail 50, a pair of left and right first cam driven rollers projecting downward from the bottom surface of the transport carriage 1 as shown in FIG. A pair of left and right side cam rails 52 capable of receiving 30a and 30b are laid on the floor surface of the travel route, and the object to be conveyed is supported by the side cam rails 52 via the pair of left and right first cam driven rollers 30a and 30b. The base 11 is configured to be supported.

  Thus, as the transport carriage 1 travels, the pair of left and right first cam driven rollers 30a and 30b move to the descending slope portion 52a (see FIG. 8) of the side cam rail 52, so 11 is lowered in parallel while further pushing down the cross link mechanism 10 to the lying posture by the load. When the transported object support base 11 reaches the lower limit position shown in FIG. 9, the first cam driven rollers 30a and 30b are separated from the terminal end of the descending slope portion 52a of the side cam rail 52, and the lower limit position is reached. The transported object support 11 that has been reached is supported by a receiving portion (not shown) provided on the transport carriage 1 side. At this time, the short link 34 of the toggle link 31 becomes a posture swinging slightly forward from the vertical posture, and the second cam driven roller 32 is slightly raised from the position closest to the traveling path floor, The first cam driven rollers 30a and 30b are located at a position that protrudes most downward from the bottom surface of the transport carriage 1, that is, a position that is closest to the floor surface of the travel route. The positions of the cam driven rollers 30a, 30b, and 32 at this time are positions below the conveyance carriage support level L.

  As is clear from the above description, as the transport carriage 1 travels in the work zone, the transport object support base 11 loaded with transport objects is moved from the ascent limit position shown in FIG. 4 to the descending limit shown in FIG. Although it can be lowered to the position, it is possible to keep the transported object support base 11 in the ascending limit position by the center cam rail 50 for a predetermined section, and to move the transported object support base 11 to the position shown in FIG. It is possible to run while holding at the intermediate height position shown, or to run while holding the transported object support base 11 at the lower limit position without laying the cam rail. Further, the height of the center cam rail 50 and the side cam rail 52 is lowered, and the conveyed product support base 11 is moved to an arbitrary height between the ascent end position and the intermediate height position, or the intermediate position, for a predetermined section. It is also possible to run while maintaining an arbitrary height between the height position and the lower limit position. Further, conversely to the above, when it is desired to raise the transported object support base 11 lowered from the ascending limit position, when the height of the transported object support base 11 at that time is the descending limit position, FIG. As shown by an imaginary line, the cross-link mechanism 10 is erected through the first cam driven rollers 30a and 30b by the ascending slope portion 52b of the side cam rail 52 to bring the conveyed product support base 11 to the intermediate height position, for example. When the object support table 11 is pushed up and the height of the transported object support base 11 is at the intermediate height position, the second cam driven roller 32 is moved by the up-gradient portion 50b of the center cam rail 50 as shown by the phantom line in FIG. For example, the cross link mechanism 10 may be further erected via the upper end to push the transported object support base 11 to, for example, the ascent end position.

  As described above, the object support base 11 of the transport carriage 1 traveling in the work zone can be raised and lowered to an arbitrary height suitable for work on the loaded object W. The object support base 11 is located above the lower limit position, and the first cam driven rollers 30a and 30b are supported by the side cam rail 52, or the second cam driven roller 32 is supported by the center cam rail 50. In the cross link mechanism 10, the position fixing fulcrum shaft 18 and the common slide fulcrum shaft 19 on the conveyance carriage 1 side (support frame 16 side) of the cross links 12 a and 12 b in the cross link mechanism 10 are placed on the object support platform 11. Therefore, an upward force that is a reaction force of a load applied to the cross link mechanism 10, that is, a buoyancy is acting. When this buoyancy is greater than the weight of the transport carriage 1, that is, the weight of the loaded transport object W increases, and the reaction force acting upward on the position fixing fulcrum shaft 18 and the common slide fulcrum shaft 19 is greater than the weight of the transport carriage 1. When it becomes larger, the transport carriage 1 itself rises, and it becomes impossible to hold the transported object support base 11 at a predetermined height by the cam rails 50 and 52 or push it up to a predetermined height.

  However, according to the configuration of the present invention including the urging means 45, the upward urging force of the urging means 45 reduces the load applied to the cross link mechanism 10 by the weight of the loaded transported object W. Therefore, if there is no urging means 45, even if a heavy transport object W such that the transport carriage 1 is lifted for the above reason is loaded on the transport object support base 11, it is transported by the urging force of the urging means 45. The lift of the carriage 1 can be suppressed, and the object support base 11 can be reliably held at a predetermined height, or can be reliably pushed up to a predetermined height. Of course, even if the weight of the transported object W when it is loaded on the transported object support base 11 at the entrance of the work zone is small enough not to cause the transport carriage 1 to be lifted, the transported object W in the work zone. Even in a situation where the weight of the object to be conveyed W gradually increases due to the part assembling work, and the weight reaches the weight that causes the conveyance carriage 1 to lift at a certain point, the urging means 45 acts effectively.

  The transport cart 1 that can be used as described above is transported by a truck or the like to a user site such as an automobile assembly factory where transport equipment using the transport cart 1 is prepared, for example, by a manufacturer that manufactured the transport cart 1. However, in order to increase the loading efficiency in the transport vehicle at this time, it is desired to lower the bulk (height) of the entire transport carriage 1 by lowering and fixing the transported object support base 11 to the lower limit position. . In such a case, the jig 60 according to the present invention shown in FIGS. 10 to 12 is used.

  The jig 60 moves the common slide fulcrum shaft 19 on the transport cart 1 (support frame 16) side in the cross link mechanism 10 from the position when the transport object support base 11 is at the lower limit position. Is for restricting the movement in the direction approaching the position fixing fulcrum shaft 18 when moving up, and a screw shaft 61 connected to the common slide fulcrum shaft 19 side, and this screw shaft 61 penetrates Are provided with a support member 62 provided on the transport carriage 1 side, and an operation nut 63 that is screwed onto the free end side of the screw shaft 61 that passes through the support member 62.

  More specifically, for connecting the common slide fulcrum shaft 19 and the screw shaft 61, a cylindrical body 64, two connecting rods 65a and 65b using a screw shaft, and an intermediate rod-shaped member 66 are used. The cylindrical body 64 is loosely fitted around the common slide fulcrum shaft 19 so as to be rotatable around a central region of the common slide fulcrum shaft 19 in the vicinity of the both ends of the common slide fulcrum shaft 19. The cylindrical body 64 is prevented from floating in the axial direction by a pair of rings 67a and 67b that are fitted and fixed to the common slide fulcrum shaft 19 adjacent to both sides in the direction. Thus, the cylindrical body 64 is provided with a connecting rod coupling portion 64a that has screw holes 68 in two directions symmetrical in the axial direction of the cylindrical body 64 in a direction orthogonal to the axial direction of the cylindrical body 64. The inner ends of the two connecting rods (screw shafts) 65a and 65b are detachably screwed and connected to the screw holes 68 and fixed by a lock nut 69. The outer end portions of the two connecting rods (screw shafts) 65a and 65b pass through two axially symmetrical left and right symmetrical positions of the intermediate rod-shaped member 66 and are fastened with a receiving nut 70 sandwiching the intermediate rod-shaped member 66. The nut 71 is fixed to the intermediate bar-shaped member 66. The screw shaft 61 is fixed to the intermediate rod member 66 by welding or the like with its inner end penetrating the central position in the axial direction of the intermediate rod member 66. The screw rod 61 is connected to the connecting rods 65a and 65b from the intermediate rod member 66. It extends in the opposite direction (outward) to the side where the lies are, and is perpendicular to the axial direction of the cylindrical body 64.

  The support member 62 includes a through hole 62a through which the outer end screw shaft portion 61a of the screw shaft 61 is inserted, and a pair of left and right support shafts 62b that are perpendicular to the axis of the through hole 62a. A pair of left and right bearing members 73 erected on the mounting plate 72 are supported so as to be rotatable around the pair of left and right support shafts 62b. Thus, the mounting plate 72 is mounted on the transport carriage 1 at a position away from the side near the common slide fulcrum shaft 19 of the support frame 16 supporting the transported object support base 11 by a suitable distance in the horizontal direction. Are detachably attached by a plurality of bolts 72a. As a result, the connecting rods 65a and 65b and the screw shaft 61 extend slightly obliquely upward from the common slide fulcrum shaft 19 in a side view but extend substantially horizontally.

  When the operation nut 63 is rotated forward in the tightening direction with the jig 60 set as described above, the screw shaft 61, the intermediate rod-shaped member 66, the connecting rods 65a and 65b, and the cylindrical body 64 are interposed. The common slide fulcrum shaft 19 is pulled and moved in the direction in which the transported object support base 11 descends (the direction away from the fixed fulcrum shaft 18), and the reverse operation is performed in the direction of loosening the operation nut 63. Will allow the common slide fulcrum shaft 19 to move in the direction in which the conveyed object support base 11 descends (the direction approaching the position fixing fulcrum shaft 18).

  Therefore, as described above, when it is necessary to lower the object support table 11 to the lower limit position and fix it, the object support table 11 is provided with the biasing means 45 as shown in FIG. In a state where the operation nut 63 is loosened to the free end of the screw shaft 61 in the state where the urging force is at the ascending limit position, the mounting plate 72 is attached to a predetermined position on the transport carriage 1 with the bolt 72a and the common slide fulcrum shaft The inner end screw shafts of the connecting rods 65a and 65b are screwed and connected to the connecting rod coupling portion 64a of the cylindrical body 64 attached to the cylinder 19 in advance using the two screw holes 68 and locked. Secure with nut 69. At this time, as shown in FIG. 10B, the cylindrical body 64 is rotated by gravity so that the connecting rod coupling portion 64a is directed downward, so that the common slide is formed so that the connecting rod coupling portion 64a faces the support member 62. What is necessary is just to rotate around the fulcrum shaft 19.

  When the jig 60 is set as described above, the operation nut 63 is rotated forward in the tightening direction to forcibly pull the common slide fulcrum shaft 19 away from the fixed position fulcrum shaft 18 to be conveyed. The object support base 11 may be lowered, but this operation requires a considerable rotational operation force and time, and a considerable load is applied to the jig 60. An object having a weight capable of lowering the object support base 11 at the ascending limit position by an urging force against an urging force of the urging means 45, for example, an appropriate means. It is desirable to lower it to the lower limit position by a method such as placing it on the object support base 11. At this time, the screw shaft 61 of the jig 60 moves together with the common slide fulcrum shaft 19 in a direction away from the fixed position fulcrum shaft 18 as the transported object support base 11 is lowered. This is performed without any trouble by the nut 63 moving freely in the through hole 62a of the support member 62 in a direction away from the support member 62.

  When the object support base 11 is lowered to the lower limit position, the operation nut 63 located at the free end of the screw shaft 61 is rotated in the tightening direction and brought into contact with the support member 62. Even if the pressing force applied to the support base 11 is released (even if the object placed on the transport object support base 11 is removed), the transport object support base 11 is biased by the biasing means 45. That is, the movement of the common slide fulcrum shaft 19 in the direction approaching the fixed position fulcrum shaft 18 causes the operation nut 63 and the transport carriage 1 on the side of the jig 60 to be interlocked with the common slide fulcrum shaft 19. This can be prevented by contact with the support member 62 on the side. That is, as shown in FIG. 10A, the transported object support base 11 is fixed at the lower limit position.

  As described above, when the transport carriage 1 with the object support base 11 fixed by the jig 60 at the lower limit position is transported to the installation site and installed on the transport path of the installation site, the operation of the jig 60 is performed. By reversely rotating the nut 63 in the loosening direction, the screw shaft 61, the intermediate rod-shaped member 66, the connecting rods 65a and 65b, and the cylindrical body 64 are moved by the amount of backward movement of the operating nut 63 relative to the screw shaft 61. Since the common slide fulcrum shaft 19 can be moved away from the fixed position fulcrum shaft 18 via the reverse rotation operation of the operation nut 63, the conveyed object support base 11 is urged by the urging means 45. It will rise gradually. In this way, as shown in FIG. 12, when the object support base 11 is raised to the ascending limit position, the jig 60 that is no longer necessary can be removed and used for transportation of another carriage 1. it can. The removal of the jig 60 includes an operation of removing the mounting plate 72 on the support member 62 side from the transport carriage 1 and an operation of unscrewing the connecting rods 65a and 65b from the cylindrical body 64 on the common slide fulcrum shaft 19 and removing them. It can be carried out. The cylindrical body 64 left on the common slide fulcrum shaft 19 side only moves sideways with the common slide fulcrum shaft 19 as the transported object support base 11 moves up and down, and has no particular influence.

  In the above embodiment, there is no hindrance to raising and lowering the object support base 11 without removing the jig 60 in particular. That is, in the state where the operation nut 63 is loosened to the position where the object support base 11 reaches the ascending limit position, or after that, the operation nut 63 is further loosened and removed from the screw shaft 61. The screw shaft 61 only moves in and out of the through hole 62a of the support member 62 in the axial direction in conjunction with the lateral movement of the common slide fulcrum shaft 19 as the elevator moves up and down. Since the raising and lowering of the support base 11 is not adversely affected, the transport carriage 1 with the jig 60 attached can be used for the transport work on the transport path.

  The urging force of the urging means 45 shown in the above embodiment is increased to such an extent that the object support base 11 on which no object is mounted can be pushed up from the descending limit position to the ascending limit position. When the transported object support base 11 on which a transported object is not mounted cannot be stabilized at the lower limit position, the transported object support base 11 is fixed at the lower limit position by the jig 60. When the operating nut 63 is loosened, the transported object support base 11 starts to move up by the urging force of the urging means 45 immediately and automatically. The upward biasing force acting on the transported object support base 11 after rising up to this point becomes very large. Accordingly, when the maximum weight of the transported object to be handled is relatively light and the transported object is mounted on the transported object support base 11 in the ascending limit position, the transported object support base 11 is based on the weight of the transported object. There is a fear that it cannot be lowered. Therefore, in such a case, it is necessary to reduce the urging force of the urging means 45. For this reason, when the transported object support base 11 on which the transported object is not mounted is at or near the descending limit position, The urging force of the urging means 45 makes it impossible to push up the transported object support base 11 to the ascending limit position. In other words, it is possible to stabilize the transported object support base 11 on which the transported object is not mounted at the lower limit position. When the urging means 45 is configured in this way, even if the operation nut 63 is loosened from the state where the object support base 11 is fixed to the lower limit position by the jig 60, the object support base 11 does not automatically start to be lifted, it is necessary to push up the conveyed product support base 11 from the lower limit position by an appropriate method after loosening the operation nut 63 to some extent.

  Accordingly, when the urging force of the urging means 45 is reduced as described above so that the transported object support base 11 on which the transported object is not mounted can be stabilized at the lower limit position, The biasing means 45 is the main biasing means, and the transported object support base 11 on which the transported object is not mounted is moved from the lower limit position by the biasing force of the main biasing means 45. 11 is added, that is, a sub urging means for pushing up to a predetermined height position raised from the lower limit position to a predetermined height, and the main urging means 45 and the sub urging means urge the urging means. It is desirable to configure.

  13 and 14 show an embodiment in which the auxiliary biasing means 53 is combined. The auxiliary urging means 53 is provided on the support frame 16 on the support frame 16 corresponding to the four places around the object support base 11 as shown by an imaginary line in FIG. A spring receiving member 54 mounted on the support frame 16, a rod 55 penetrating the spring receiving member 54 vertically up and down within a certain range, and an upper end of the rod 55. The attached contact board 56, the compression coil spring 57 loosely fitted to the rod 55 between the contact board 56 and the spring receiving member 54, and the contact board 56 on the lower side of the object support base 11. It is comprised from the contact member 58 attached so that it might face. Further, in this embodiment, stopper bolts 59 for receiving the object support table 11 are attached to the spring receiving members 54 via the contact members 58 when the object support table 11 is lowered to the lower limit position. Yes.

  The sub urging means 53 is configured to support the transported object support base 11 in a process in which the transported object support base 11 on which the transported object is mounted descends from a predetermined height position slightly above the lower limit position to the lower limit position. The respective contact members 58 on the side compress the respective compression coil springs 57 on the support frame 16 side via the contact plates 56. At this time, the compression reaction force of each compression coil spring 57 is conveyed. Mainly biasing means for the object support base 11 on which the object to be conveyed is not mounted and each contact member 58 on the object support base 11 side is at the lower limit position received by each stopper bolt 59 on the support frame 16 side. The height at which the urging force of the urging means 45 can continuously push up the transported object support base 11, that is, the height at which each compression coil spring 57 reaches the extension limit as it rises from the lower limit position to a predetermined height. Younger than And it is configured such that the strength of which can be pushed to a lower predetermined height position.

  Therefore, although only the urging means 45, which is the main urging means, cannot move the transported object support base 11 on which the transported object is not mounted from the lower limit position, Since the object support base 11 is pushed up from the lower limit position to the predetermined height position by the force, the urging force of the urging means 45, which is the main urging means, subsequently causes the object support base 11 to move to the predetermined position. It can be pushed up from the height position to the ascending limit position. According to this configuration, even if the urging force of the urging means 45 that is the main urging means is not increased unnecessarily, the conveyed object support base 11 on which the conveyed object is not mounted is reliably raised from the lower limit position. Since it can be moved up to the limit position, if the operation nut 63 is loosened from the state where the object support base 11 is fixed at the lower limit position using the jig 60, it is immediately and automatically performed. Ascending of the transported object support base 11 can be started.

It is a general | schematic partially vertical side view explaining the whole structure of a conveyance trolley. It is a schematic top view explaining the whole structure of a conveyance trolley. It is a cross-sectional top view which shows a cross-link mechanism when a to-be-conveyed object support stand exists in a raise limit position. It is a vertical side view which shows the principal part when a to-be-conveyed object support stand exists in a raise limit position. It is a vertical rear view which shows the principal part when a to-be-conveyed object support stand exists in a raise limit position. It is a cross-sectional top view which shows a biasing means when a to-be-conveyed object support stand exists in a raise limit position. It is a vertical side view of the principal part which shows the state immediately before lowering a to-be-conveyed object support stand from a raise limit position. It is a vertical side view of the principal part which shows the state immediately before lowering the to-be-conveyed object support stand from the intermediate height position. It is a vertical side view of the principal part which shows a state when a to-be-conveyed object support stand exists in a descent | fall limit position. Fig. A is a vertical side view of the main part showing a state where the object support base is fixed at the lower limit position using a jig, and Fig. B is an enlarged partial vertical side view showing the state before the jig is attached, FIG. C is a longitudinal side view of the jig at the screw shaft position. It is a top view of the principal part which shows the state which fixed the to-be-conveyed object support stand in the descent | fall limit position using a jig | tool. It is a vertical side view of the principal part which shows the state which operated the jig | tool and raised the to-be-conveyed object support stand to the raise limit position. It is a vertical side view of the principal part which shows embodiment which employ | adopted the suburging means. It is a figure which shows the sub biasing means in embodiment same as the above, Comprising: A figure is a vertical side view which shows the state before a to-be-conveyed object support stand reaches a descent | fall limit position, FIG. It is a vertical side view which shows the state which reached to.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer carriage 2a, 2b Guide rail 3 Attitude control guide rail 4 Friction drive wheel 5 Backup roller 8 Wheel 9a-9d Vertical axis roller 10 Cross link mechanism 11 Conveyed object support stand 12a, 12b Cross link 13a-14b Link 16 Support Frames 17 and 22 Bearing members 18 and 23 Position fixed fulcrum shafts 19 and 24 Common slide fulcrum shafts 20 and 25 Rollers 21 and 26 Front and rear direction slide guides 30a and 30b (for lifting) First cam driven roller 31 Toggle link 32 (for lifting) ) Second cam driven roller 39 Automatic locking means 40 Locked portion 41 Locking tool 44 Unlocking cam driven roller 45 Energizing means 46 Energizing unit 47 Pulling shaft rod 48 Compression coil spring 50 Center cam rail (for raising and lowering) (Second cam rail)
51 Cam rail for unlocking 52 Side cam rail (first cam rail for lifting)
53 Sub biasing means 54 Spring receiving member 55 Rod 56 Contacting plate 57 Compression coil spring 58 Contacting member 59 Stopper bolt 60 Jig 61 Screw shaft 62 Support member 62a Through hole 62b Support shaft 63 Operation nut 64 Cylindrical body 65a, 65b Connecting rod (screw shaft)
66 Intermediate rod-shaped members 67a and 67b Cylindrical body position fixing rings 69 to 71 Nut 72 Mounting plate 73 Bearing member

Claims (8)

  A transported object support base is supported on a transport carriage capable of traveling on a fixed travel path so as to be movable up and down, and an elevating cam driven roller that moves up and down in conjunction with the up and down movement of the transported object support base is provided, In the travel route of the transport carriage, a lift cam rail that pushes up the lift cam follower roller is provided, and a biasing means that biases the transported object support base in the upward direction is provided. When the object to be conveyed is not mounted on the object to be conveyed support, the object to be conveyed support is moved up, but when the object to be conveyed is mounted on the object to be conveyed support, the object to be supported by the load is supported. A cart-type transfer device configured to allow the table to be lowered, provided with a detachable jig that holds the object support table in a lowered position against the urging force of the urging means, This jig corresponds to the amount of rotation operation And an operation screw member to allow upward movement of the conveyed object support table according to the biasing force Te, carriage-type conveyance device.   A transported object support base is supported on a transport carriage capable of traveling on a fixed travel path so as to be movable up and down, and an elevating cam driven roller that moves up and down in conjunction with the up and down movement of the transported object support base is provided, An elevation cam rail for pushing up the elevation cam follower roller is provided in the travel path of the conveyance carriage, and an urging means for urging the conveyed object support base in the upward direction is provided. When the object to be conveyed is not mounted on the object support table, the force moves the object object support table up, but when the object is mounted on the object object support table, the force depends on the load. A carriage-type transfer device set to a strength that allows the transfer object support table to descend, and a jig that holds the transfer object support table in a lowered position against the urging force of the urging means This jig corresponds to the amount of rotation operation. In the state where the operation screw member that allows the object support table to move upward by the biasing force is provided and the operation screw member is located at the position where the object support base is raised to the ascent limit position, A cart-type transfer device configured to be freely movable up and down within a range below the position. The transported object support base is supported so as to be movable up and down on the transport carriage via a cross link mechanism having a pair of left and right cross links, and each of the pair of left and right cross links has a central fulcrum whose concentric center is concentric. Consists of two links pivoted by shafts, and one end portions of the two links are pivotably pivoted to the transport carriage and the transport object support base by concentric position fixing fulcrum shafts, respectively. The slide link ends on the other end side of the two links are supported so as to be swingable up and down around slide fulcrum shafts that are slidable in the horizontal direction on the transport carriage and the transport object support base, respectively. Koo, a screw shaft connected to a common sliding fulcrum shaft connecting the sliding link ends each other in the conveyance carriage side of the pair of right and left crosslinks, wherein provided on the conveyance carriage away from the conveyed object support table A support member di- axis is penetrations, and an operation nut for screwed on the free end of the screw shaft passing through the support member, carriage-type conveying apparatus according to claim 1 or 2.   A cylindrical body is loosely fitted to the common slide fulcrum shaft so as to be capable of rotating, and an intermediate rod-shaped member disposed in parallel with the cylindrical body at an intermediate position between the cylindrical body and the support member, and the cylindrical body Are connected by connecting rods at two locations in the axial direction of the cylindrical body, and the screw shaft is attached to the intermediate rod-like member at an inner end portion of the two connecting rods, and the support member is 4. The cart-type transport device according to claim 3, wherein the cart-type transport device is supported by a bearing member standing on the transport cart side so as to be rotatable around a support shaft parallel to the cylindrical body.   The carriage according to claim 3 or 4, wherein the carriage support base can be moved up and down with the axial movement of the screw shaft relative to the support member by loosening or removing the operation nut. Type conveyor.   6. The cylindrical body is provided with a connecting rod coupling portion for detachably coupling the two connecting rods, and the bearing member is detachably attached to a transport carriage. The trolley | bogie type conveying apparatus of description.   The urging force of the urging means is set to a strength with which the object support table on which the object to be conveyed is not mounted can be moved up from the descending limit position to the ascending limit position. The trolley | bogie type conveying apparatus of any one of these.   The urging means moves the transported object support base up to the ascending limit position when the transported object support base on which the transported object is not mounted is at a predetermined height position raised from the lower limit position to a predetermined height. The main urging unit for moving the object and a sub urging unit for moving the object support base on which the object to be conveyed is not mounted from the lower limit position to the predetermined height position. Trolley type transport device.

Images