JP3814577B2 - Transport vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transport vehicle operated on a transport line that transports a workpiece.
[0002]
[Prior art]
As shown in FIG. 10, a connecting rod 1 (hereinafter also referred to as a connecting rod) constituting an internal combustion engine of an automobile has a first end 3 in which a small through hole 2 is formed and a first end in which a large through hole 4 is formed. It is a long object having two end portions 5 and a body portion 6 that connects the first end portion 3 and the second end portion 5. Among these, a pin for connecting the connecting rod 1 to the piston is passed through the small through hole 2 of the first end 3, and a crankshaft is passed through the large through hole 4 of the second end 5. That is, the crankshaft and the piston are connected via the connecting rod 1.
[0003]
When the automobile is operated, in the internal combustion engine, the connecting rod 1 is displaced as the crankshaft rotates, and the piston is displaced in the cylinder bore following this.
[0004]
In the process of manufacturing the connecting rod 1 having such an action, a crushing process for crushing and expanding the end part and a drilling process for providing the small through hole 2 and the large through hole 4 to the expanded end part are performed. The At this time, for example, the molded product is directly placed on a belt conveyor or the like from a crushing station to a punching station.
[0005]
By the way, when placing the molded product directly on the belt conveyor as described above, it is pointed out that if the molded product is placed vigorously, the molded product may be damaged by the impact at that time. ing.
[0006]
Also, for example, when drilling is performed, the molded product placed on the belt conveyor is gripped by a robot and transferred to the drilling device, but the molded product faces a random direction on the belt conveyor. Moreover, since one end surface of the molded product is in contact with the belt conveyor, there is a problem that it is not easy for the robot to grip the molded product. When the robot cannot grip a predetermined portion of the molded product, it is difficult to form the small through hole 2 and the large through hole 4 at predetermined positions. That is, when conveying a molded article with a belt conveyor, the malfunction that it is not easy to provide the small through-hole 2 and the large through-hole 4 with high precision has become obvious.
[0007]
Therefore, it is also conceived that the molded product is transported by mounting the molded product on a jig and moving the belt up on the belt conveyor. However, in this case, there is a concern that the jig collapses.
[0008]
And the literature which discloses the technical idea which conveys along a conveyance line in the state which stood up the elongate workpiece | work is not known so far.
[0009]
[Problems to be solved by the invention]
The present invention has been made to solve the above-described problems, and is capable of reliably transporting various types of workpieces without damaging them, and providing a transport vehicle having a small and simple configuration. Objective.
[0010]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention is accompanied by displacement along the conveying line.LongWorkIn a standing postureTransport vehicle to transportLinked transport vehicle with multiple connectedBecause
  The transport vehicle isHold the workpieceGrip with clamp pawlHolding mechanism;
  A clamping mechanism that includes a set of plate members including at least one movable plate, and clamps a portion of the workpiece that is different from a location gripped by the gripping mechanism with the set of plate members;
  SaidClamp claw and the movable plate in the direction to hold the workpieceEarnMovementA holding member operating mechanism,
  SaidEach of the clamp claw and the movable plateTheClamp claw and movable plateA resilient member that is resiliently biased in a direction opposite to the direction operated under the action of the holding member operating mechanism;
  SaidHoldHolding mechanism, The clamping mechanismAnd a main body that supports the holding member operating mechanism,
  An engagement member attached to the main body and engaged with a guide member constituting the transport line;
  Have
  The holding member operating mechanismButUnder the action of a drive mechanism installed along the transfer lineThe clamp pawl and the movable plate in a direction opposite to the direction in which the elastic member is urgedRunningAs the clamp pawl and the set of plate members open, the clamp pawl and the movable plate are released from the action of the holding member operating mechanism, and the elastic member is subjected to the elastic hitting. Under the urging action, the clamp pawl and the pair of plate members are opened, and the gripping mechanism and the clamping mechanism hold the workpiece in an upright posture.,
  And it is displaced while being guided along the guide member.
[0011]
According to the present invention, the workpiece is conveyed while being held. For this reason, it is not necessary to place a workpiece on a belt conveyor or the like. Inevitably, since the workpiece does not collide with the belt conveyor, the concern that the workpiece is damaged can be eliminated.
[0012]
Further, in the transport carrier configured as described above, the work is mounted and transported at a predetermined position. Therefore, at the station that performs the next process, the robot can reliably hold a predetermined part of the workpiece, and therefore the robot may always perform the same operation. For this reason, it is not particularly necessary to install a robot that performs a complicated operation, so that the capital investment can be reduced.
[0013]
  Moreover, the holding mechanism(Grip mechanism and clamping mechanism)Since the holding member operating mechanism for operating is driven by the drive mechanism installed in the transport line, it is not necessary to install the drive mechanism in the transport vehicle itself. Thereby, it becomes possible to comprise a conveyance vehicle very simply.
[0014]
Furthermore, in the present invention, the workpiece is held with a relatively small force, ie, a bullet biasing force of the bullet member. For this reason, the workpiece can be easily detached from the transport vehicle. In other words, it is easy to take out the workpiece from the transport vehicle.
[0015]
  The holding mechanism isAs mentioned aboveA gripping mechanism having a clamp claw that operates under the action of the holding member operating mechanism, a set of plate members that include at least one movable plate, and a portion that is gripped by the gripping mechanism in the workpiece. Can be constituted by a clamping mechanism that clamps another portion with a set of the plate members. In this case, the workpiece may be clamped or released by displacing the movable plate under the action of the holding member operating mechanism.
[0016]
In this way, by installing the two types of holding mechanisms, the workpiece can be held more reliably.
[0017]
  In order to displace the transport vehicle along the transport line, for example, a cam provided with a tooth portion is attached to the transport vehicle, and the tooth portion of the cam is attached to a transfer chain provided along the transport line. What is necessary is just to make it mesh.Alternatively, a transfer chain and a guide member that is disposed below the transfer chain and supports the transfer chain are provided along the transport line, and the transfer chain is elastically biased by the elastic member. A chain pressing plate may be provided on the transport vehicle, and the transfer chain may be interposed between the chain pressing plate and the guide member.In this case, along with the circular motion of the transfer chainThe chain pressing plate receives a force from the upper surface of the transfer chain,Transport vehicleAlong the transfer chainDisplace.
[0018]
Here, a locking member is attached to the main body of the transport vehicle, and when the holding member operating mechanism operates the holding member under the action of the drive mechanism, the hook member of the lock mechanism installed in the transport line is engaged with the engaging member. It is preferable to be engaged with a stop member. This is because the carriage is positioned by this, so that the workpiece can be reliably mounted at a predetermined position of the carriage.
[0019]
Moreover, it is preferable to have the pocket part for inserting the edge part of a workpiece | work and supporting this edge part. This is because the end portion of the workpiece is inserted into the pocket portion, so that the workpiece can be reliably prevented from falling from the transport vehicle.
[0020]
In the present invention, the pocket portion, the gripping mechanism, and the clamping mechanism can be provided in the main body in this order from below. By comprising in this way, even if a workpiece | work is a long thing, it becomes possible to convey this workpiece | work in the state which stood up. Therefore, since the dimensions in the lateral direction and the depth direction of the transport vehicle can be reduced, the transport vehicle can be configured to be small in the end.
[0021]
As a long workpiece, a connecting rod constituting an internal combustion engine of an automobile can be exemplified. Note that the connecting rod in the present invention includes a molded product that is processed so as to finally have the shape of the connecting rod.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a transport vehicle according to the present invention will be described and described in detail with reference to the accompanying drawings.
[0023]
In the connected transport vehicle 10 according to the present embodiment shown in FIG. 1, the transported vehicle in a state where four vehicles are connected displaces on the transport line 12, thereby forming a molded product W that becomes the connecting rod 1 (see FIG. 10). It is transported as a workpiece.
[0024]
A rail 14 extends in the conveying direction of the conveying line 12, and a chain 16 is stretched along the extending direction of the rail 14. The chain 16 is meshed with a sprocket 18 that is urged to rotate by a motor (not shown). The coupled transport vehicle 10 is displaced while being guided by the rail 14 when the chain 16 starts rotating around as the sprocket 18 is urged to rotate.
[0025]
The chain 16 is accommodated in the cover member 20 whose side portion along the longitudinal direction is open. The cover member 20 is supported by a plurality of stepladder members 22 erected on the ground, and bending is prevented by this support.
[0026]
In FIG. 1, air cylinders 24 and 24 are arranged between the stepladder members 22. As will be described later, each air cylinder 24 is energized when a molded product is mounted on the coupled transport vehicle 10. As shown in FIG. 2, the upper end large-diameter portion 28 of the rod 26 constituting the air cylinder 24 is notched partially so as to be directed downward toward the diametrically inner side of the upper end large-diameter portion 28. Thus, an inclined portion 30 that is inclined is provided. A projection 34 is formed on the upper end surface of the cylinder tube 32 so as to protrude.
[0027]
Here, the air cylinder 24 is provided with a lock mechanism 36. The lock mechanism 36 includes a hook member 38 provided with a protruding upper end portion, and a bearing roller 40 that slides along an inclined portion 30 provided on the upper end large diameter portion 28 of the rod 26.
[0028]
The hook member 38 is provided with a through hole, and a bolt 42 is passed through the through hole. The bolt 42 is screwed into the screw hole of the protrusion 34. The body of the bolt 42 is passed through a coil spring 44. One end of the coil spring 44 is seated on the hook member 38, and the other end is in contact with the lower end surface of the head of the bolt 42.
[0029]
The bearing roller 40 is rotatably supported by a support member 46 attached to the hook member 38. As will be described later, as the bearing roller 40 slides along the inclined portion 30, the hook member 38 tilts under the action of the coil spring 44.
[0030]
The leading transport vehicle constituting the coupled transport vehicle 10 that displaces the transport line 12 configured as described above along the rail 14 is connected to the base plate 50 with the under plate 52 and the upper plate 54 as understood from FIG. The main body 56 is configured by being formed. Among these, the base plate 50 includes a main portion 58 and a lower horizontal portion 60 and an upper horizontal portion 62 that are bent substantially perpendicularly from the main portion 58. The under plate 52 includes a lower tongue piece portion 64 that hangs vertically downward, a horizontal portion 66 that is bent perpendicularly to the lower tongue piece portion 64 and extends toward the main surface, and the horizontal portion 66. The upper plate 54 has a vertically rising upper tongue piece 68, while the upper plate 54 has a bottom 70, a rear vertical end 72 and a front vertical end 73 rising vertically from the bottom 70. An upper tongue piece 68 of the under plate 52 and a rear vertical end 72 of the upper plate 54 are connected to one end face of the main portion 58 of the base plate 50.
[0031]
As shown in FIGS. 2 to 4, the main body 56 includes a locking member 74, a first V-shaped pocket portion 76 a and a second pocket portion 76 b that are substantially V-shaped with lower ends opened, and a body of the molded product W. A first clamping mechanism 78a and a second clamping mechanism 78b that grip the portion 6, and a first clamping mechanism 80a and a second clamping mechanism 80b for clamping the large-diameter second end portion 5 of the molded product W are viewed from below. They are provided in this order. This point will be specifically described below.
[0032]
The locking member 74 having a substantially L-shaped cross section includes a horizontal locking portion 82 extending toward the upper end protruding portion of the hook member 38, and a wall portion 84 rising vertically from the horizontal locking portion 82. Have The locking member 74 is fixed to the lower tongue piece portion 64 by a bolt (not shown) passing through the lower tongue piece portion 64 of the under plate 52 and screwed into the wall portion 84. In addition, the 1st pocket part 76a and the 2nd pocket part 76b are comprised by attaching to the lower tongue piece part 64 in the state in which four acute angle plates with a sharp lower end were inclined.
[0033]
A first rod 86 is passed through the horizontal portion 66 of the under plate 52. The upper end portion of the first rod 86 passes through the bottom portion 70 of the upper plate 54. The body portion of the first rod 86 is provided with a large diameter portion 88, and a recessed portion 90 is formed in the body portion below the large diameter portion 88 by cutting out a part of the body portion. ing.
[0034]
The upper portion of the trunk portion is surrounded by a coil spring 92 above the large diameter portion 88. That is, the coil spring 92 is sandwiched between the large diameter portion 88 and the lower end surface of the bottom portion 70, and accordingly, always urges and urges the large diameter portion 88 in a direction away from the bottom portion 70. For this reason, the first rod 86 is constantly urged and urged downward in FIGS.
[0035]
A base 94 constituting a first clamp mechanism 78a is further connected to the horizontal portion 66 of the under plate 52, and two clamp claws 96a and 96b are pivotally fixed to the base 94. ing. Among these, one end portion of the arm member 98 is connected to the clamp claw 96 a disposed on the outside, and the other end portion of the arm member 98 formed in a spherical shape is in the recess 90 of the first rod 86. Contained.
[0036]
Tooth base portions (not shown) are respectively provided at the base end portions of the clamp claws 96a and 96b, and the both tooth portions engage with each other. When one tooth profile part rotates clockwise, the remaining one tooth profile part rotates counterclockwise.
[0037]
From the horizontal portion 66 of the under plate 52 to the bottom portion 70 of the upper plate 54, the second rod 100 is passed through the substantially central portion thereof. The body portion of the second rod 100 is also provided with a large-diameter portion 102, and a concave portion 104 is formed in the large-diameter portion 102 by notching a part thereof.
[0038]
The lower ends of the first rod 86 and the second rod 100 are located above the upper end large diameter portion 28 of the rod 26 constituting the air cylinder 24.
[0039]
The first clamping mechanism 80 a has an outer movable plate 106 and an inner movable plate 108. On the outer movable plate 106 and the inner movable plate 108, pressing rods 114 and 116 are respectively fixed by bolts 110 and 112. As shown in FIG. 5, the pressing rods 114 and 116 have tooth portions 117a. 117b. The tooth portions 117a and 117b are meshed with the pinion 118. That is, the pressing rods 114 and 116 are connected to each other via the rack and pinion mechanism 119 and interlock with each other under the action of the rack and pinion mechanism 119. Following this, the outer movable plate 106 and the inner movable plate 108 move toward or away from each other.
[0040]
The outer movable plate 106 and the inner movable plate 108 are provided with through holes 120 and 122, respectively (see FIG. 3). When the outer movable plate 106 and the inner movable plate 108 are positioned closest to each other, the pressing rod 114 protrudes from the through hole 122 of the inner movable plate 108, and the pressing rod 116 has the through hole 120 of the outer movable plate 106. Protrude from.
[0041]
The inner movable plate 108 is provided with a cut portion 124. The front vertical end 73 of the upper plate 54 constituting the main body 56 is in contact with and supported by the second end 5 of the connecting rod 1 to position the second end 5. Is installed.
[0042]
In the above configuration, the second clamping mechanism 78b is configured similarly to the first clamping mechanism 78a, and the second clamping mechanism 80b is configured in the same manner as the first clamping mechanism 80a. Therefore, the same reference numerals are assigned to the same components. A detailed description thereof will be omitted.
[0043]
Here, in the concave portion 104 of the second rod 100, one end portions of the substantially L-shaped first L-shaped arm member 128a and the second L-shaped arm member 128b are accommodated and held. The bent portions of the first L-shaped arm member 128a and the second L-shaped arm member 128b are pivotally supported by the pins 129a and 129b. Therefore, the first L-shaped arm member 128a and the second L-shaped arm member 128a are pivoted. The mold arm member 128b is rotatable about the bent portion.
[0044]
The other end of the first L-shaped arm member 128a is in contact with the inner end of the pressing rod 114 of the first clamping mechanism 80a, while the other end of the second L-shaped arm member 128b is the second end. It contacts the inner end of the pressing rod 114 of the clamping mechanism 80b.
[0045]
Further, as shown in FIGS. 3 and 4, a guide bar 130a fixed to each inner movable plate 108, 108 is passed through each outer movable plate 106, 106 by a pin (not shown). Cover members 132, 132 are fitted on the heads of the pins protruding from the inner movable plates 108, 108, and these cover members 132, 132 are accommodated in the coil spring 134. Each end of the coil spring 134 is in contact with both inner movable plates 108 and 108, respectively. On the other hand, a guide bar 130b fixed to each outer movable plate 106, 106 by a pin 137 (see FIG. 3) is passed through each inner movable plate 108, 108.
[0046]
On the back surface of the base plate 50 constituting the main body 56, wheels 140 and 140 are rotatably inserted into the lower shaft 136 and the upper shaft 138 connecting the under plate 52 and the upper plate 54, respectively (FIG. 2). reference). These wheels 140 and 140 are slidably fitted to the rail 14.
[0047]
Among these, a chain pressing plate 142 that presses the chain 16 is attached to the upper shaft 138 via a frame body 143. Specifically, as shown in FIG. 6, the frame 143 is provided with a notch groove 144, and the chain pressing plate 142 is inserted into the notch groove 144.
[0048]
Both front and rear ends of the lower surface of the chain pressing plate 142 are formed in an arc shape. On the other hand, two U-shaped grooves 145a and 145b that cross in the width direction are formed on the upper surface of the chain pressing plate 142. The two U-shaped grooves 145a and 145b include the upper shaft 138 of the base plate 50, 138 is passed.
[0049]
Two bottomed holes 146a and 146b are provided between the U-shaped grooves 145a and 145b. Coil springs 148a and 148b having natural lengths (lengths in a state where no external force is applied) slightly larger than the depths of the holes 146a and 146b are inserted into the holes 146a and 146b, respectively. Furthermore, a slightly vertically long slot 150 is provided at the approximate center of the side surface of the chain pressing plate 142 in the width direction.
[0050]
Holes 152a and 152b through which the upper shafts 138 and 138 pass are provided in the vicinity of the front and rear ends of the side wall of the frame 143, and a small hole 154 is provided in the approximate center. The small hole 154 is fitted with a retaining pin 156 that is passed through the long hole 150 of the chain pressing plate 142, whereby the chain pressing plate 142 is attached to the frame body 143.
[0051]
At this time, the chain pressing plate 142 is elastically biased by the compressed coil springs 148a and 148b. The chain pressing plate 142 can be moved up and down in accordance with the dimensional difference between the long hole 150 and the retaining pin 156 in the vertical direction.
[0052]
A lateral sprocket 158 is attached to the side wall of the frame 143. That is, a small hole 158 is provided between the small hole 154 and the hole 152a, and a fixing pin 162 that is passed through the through hole 160 of the lateral sprocket 158 is fitted into the small hole 158.
[0053]
The frame 143 includes a bolt 166a screwed into a bolt hole of the upper shaft 138 passed through the wheel 140, the spacer 164a, the U-shaped groove 145a, the hole 152a, and the through-hole 164 provided in the lateral sprocket 158, and the wheel. 140, the bolt 166b is screwed into the bolt hole of the upper shaft 138 passed through the spacer 164b, the U-shaped groove 145b, and the hole 152b, thereby being connected to the upper shafts 138 and 138.
[0054]
Here, the chain 16 is supported by a lower horizontal guide 168 a and an upper horizontal guide 168 b connected to the rail 14, thereby preventing the chain 16 from being bent.
[0055]
A buffer member 170 is attached to the upper end portion of the base plate 50 to mitigate an impact when a situation occurs such that it collides with a preceding transport vehicle (see FIG. 3).
[0056]
Of the transport vehicles other than the leading transport vehicle, the second and third transport vehicles have the buffer member 170 at the upper rear end of the base plate 50 except that the buffer member 141 is not provided. Except for being attached, it is configured in the same way as the leading transport vehicle.
[0057]
The transport vehicles configured as described above are connected to each other by a connecting bar 172 (see FIG. 1).
[0058]
The coupled transport vehicle 10 according to the present embodiment is basically configured as described above. Next, the function and effect will be described.
[0059]
The molded product W of the connecting rod 1 that is a workpiece is transported by the coupled transport vehicle 10 as follows.
[0060]
First, the sprocket 18 is rotationally biased by biasing the motor installed in the transport line 12. Accordingly, when the chain 16 starts rotating, the chain pressing plate 142 presses the chain 16 under the elastic force of the coil springs 148a and 148b, so that the chain 16 sliding on the upper horizontal guide 168b is moved. Since the upper horizontal guide 168 b and the chain pressing plate 142 are sandwiched, the chain pressing plate 142 receives force from the upper surface of the chain 16. For this reason, the coupled transport vehicle 10 starts to move on the principle of so-called rollers, and eventually starts to be displaced along the transport line 12. At this time, the connected transport vehicle 10 is displaced while being guided by the rail 14 because the wheel is fitted to the rail 14.
[0061]
When the coupled transport vehicle 10 is displaced to the station where the molded product W is mounted, the coupled transport vehicle 10 stops at a predetermined position under the action of a brake mechanism (not shown).
[0062]
Thereafter, the rod 26 of the air cylinder 24 moves upward. At this time, since the bearing roller 40 slides while contacting the inclined portion 30 of the upper end large diameter portion 28 of the rod 26, the bearing roller 40 is displaced toward the inside in the diameter direction of the upper end large diameter portion 28. Following this, the hook member 38 tilts, and finally, the protruding upper end portion of the hook member 38 is engaged with the horizontal locking portion 82 of the locking member 74 as shown in FIG. Thereby, the connection conveyance vehicle 10 is positioned.
[0063]
Moreover, the 1st rod 86 and the 2nd rod 100 raise by being pressed by the upper end large diameter part 28 of the rod 26. FIG. Following this, as one end of the arm member 98 housed in the recess 90 of the first rod 86 in the first clamp mechanism 78a rises, the clamp pawl 96a tilts toward the outside. As described above, since the tooth profile portions provided on the clamp claw 96a and the clamp claw 96b are engaged with each other, the clamp claw 96a opens outward, and at the same time, the clamp claw 96b also tilts outward, and as a result, As shown in FIG. 8, the clamp claws 96a and 96b are opened.
[0064]
When the above operation is performed, the coil spring 92 is compressed.
[0065]
Also in one second rod 100, one end of the first L-shaped arm member 128a housed in the recess 104 rises, and as a result, the first L-shaped arm member 128a rotates around the bent portion as a fulcrum. To do. For this reason, the pressing rod 114 is pressed and displaced at the other end of the first L-shaped arm member 128 a, and finally, the outer movable plate to which the pressing rod 114 is connected is separated from the second rod 100. It is displaced in the direction. At this time, since the tooth portions 117a and 117b of the pressing rod 114 and the pressing rod 116 are engaged with the pinion 118, the pressing rod 116 is operated under the action of the rack and pinion mechanism 119 as shown in FIG. In addition, it is displaced in the direction opposite to the pressing rod 114. As a result, the inner movable plate connected to the pressing rod 116 is displaced toward the second rod 100 side.
[0066]
That is, the outer movable plate 106 and the inner movable plate 108 are displaced in directions away from each other while being guided by the guide bars 130a and 130b. In other words, the 1st clamping mechanism 80a will be in an open state (refer FIG. 8). When the outer movable plate 106 and the inner movable plate 108 are positioned farthest from each other, the guide bar 130a is detached from the outer movable plate 106, and the guide bar 130b is detached from the inner movable plate 108.
[0067]
Of course, the above operation is also performed in the second clamping mechanism 78b and the second clamping mechanism 80b, and therefore the coil spring 134 is compressed by the two inner movable plates 108 and 108.
[0068]
In this state, as shown in FIG. 3, the two molded products W gripped by the robot are inserted from the front of the first clamping mechanism 80a and the second clamping mechanism 80b, respectively. The first end portion 3 having a small diameter of the molded product W is inserted and held in the first pocket portion 76a or the second pocket portion 76b.
[0069]
Thereafter, when the rod 26 of the air cylinder 24 is lowered, the first rod 86 and the second rod 100 are released from the pressing force of the air cylinder 24, and the second rod 100 is lowered and the coil springs 92 and 92 are extended. At this time, as the coil springs 92 and 92 elastically urge the first rods 86 and 86, respectively, the first rods 86 and 86 move downward.
[0070]
As a result, the arm member 98 moves downward, so that the clamp claws 96a and 96b of the first clamp mechanism 78a are tilted simultaneously and inwardly under the action of the meshing portions engaged with each other. As a result, the body portion 6 of the molded product W is gripped by the clamp claws 96a and 96b. Of course, the same applies to the second clamp mechanism 78b.
[0071]
On the other hand, the respective one end portions of the first L-shaped arm member 128a and the second L-shaped arm member 128b are lowered, and the first L-shaped arm member 128a and the second L-shaped arm member 128b are rotated. The pressing rods 114 and 114 are released from the pressing force of the first L-shaped arm member 128a or the second L-shaped arm member 128b. When this pressing force becomes smaller than the elastic biasing force of the coil spring 134, the coil spring 134 expands and elastically biases the inner movable plates 108 and 108. As a result, the inner movable plates 108 and 108 are displaced toward the outer movable plates 106 and 106, and the outer movable plates 106 and 106 are directed toward the inner movable plates 108 and 108 under the action of the rack and pinion mechanism 119. Displace.
[0072]
That is, the outer movable plates 106 and 106 and the inner movable plates 108 and 108 are displaced in a direction approaching each other, and finally hold the large-diameter second end portion 5 of the molded product W.
[0073]
In short, in the present embodiment, in the molded product W, the first end portion 3 is inserted and held in the first pocket portion 76a or the second pocket portion 76b, and the body portion 6 is held in the first clamp mechanism 78a or the second clamp. The second end portion 5 is sandwiched between the first sandwiching mechanism 80a or the second sandwiching mechanism 80b and mounted on the coupled transport vehicle 10 while being held up by the mechanism 78b. As described above, since the long molded product W can be erected and mounted, each dimension of the coupled transport vehicle 10 in the lateral direction or the depth direction can be reduced. Eventually, the coupled transport vehicle 10 can be configured as a small one.
[0074]
The opening / closing operation of the first clamping mechanism 78a and the second clamping mechanism 78b and the clamping / release operation of the first clamping mechanism 80a and the second clamping mechanism 80b are performed only by the air cylinder 24 installed in the station. For this reason, since it is not necessary to incorporate hydraulic equipment, pneumatic equipment, and electrical equipment into the coupled transport vehicle 10, the configuration of the coupled transport vehicle 10 and the transport line 12 can be simplified.
[0075]
In addition, in this case, since the molded product W is mounted on the coupled transport vehicle 10, no impact is applied to the molded product W. For this reason, it can also avoid that the molded article W is damaged.
[0076]
Furthermore, since the molded product W is blocked by the first pocket portion 76a or the second pocket portion 76b, it is possible to reliably prevent the molded product W from dropping from the coupled transport vehicle 10.
[0077]
When the rod 26 of the air cylinder 24 is lowered, the bearing roller 40 is rotated along the inclined portion 30 of the upper end large diameter portion 28 of the rod 26, thereby directing the outer diameter direction of the upper end large diameter portion 28. To displace. At this time, the hook member 38 is tilted by being elastically biased by the coil spring 44, and as a result, the protruding upper end portion of the hook member 38 is detached from the horizontal locking portion 82 of the locking member 74 (FIG. 2). reference). As a result, the coupled transport vehicle 10 is released from the lock mechanism 36.
[0078]
Further, the coupled transport vehicle 10 is released from the brake mechanism.
[0079]
During this time, the motor is urged to rotate without being stopped. Therefore, the coupled transport vehicle 10 released from the lock mechanism and the brake mechanism is again guided while being guided by the rail 14 under the action of the rotating chain 16. Start to displace. Thereby, the molded product W is conveyed to the station which performs the next process.
[0080]
At the next station, the molded product W that has been transported is gripped by the gripping robot and removed from the coupled transport vehicle 10. At this time, since the molded product W stands up with the second end portion 5 facing upward, the gripping robot can easily grip the molded product W.
[0081]
Further, only the first end 3 is gently inserted in the first pocket portion 76a and the second pocket portion 76b, and the first clamp mechanism 78a, the second clamp mechanism 78b, the first clamping mechanism 80a, and the second In the clamping mechanism 80b, the gripping robot can easily detach the molded product W from the coupled transport vehicle 10 because it is only gripped or clamped by a relatively small force such as the elastic urging force of the coil springs 92 and 134. Can do.
[0082]
Furthermore, since the molded product W is positioned by the first pocket portion 76a and the second pocket portion 76b, the operation when the gripping robot grips can be made the same every time. For this reason, a gripping robot having a simple configuration can be sufficiently handled, so that a gripping robot that performs a complicated operation is not particularly required. Accordingly, capital investment can be reduced.
[0083]
Here, when the molded product W having different dimensions is conveyed, the clamp claws 96a and 96b, the outer movable plates 106 and 106, and the inner movable plates 108 and 108 are displaced until the molded product W is gripped or sandwiched. In other words, the coupled transport vehicle 10 can be mounted with molded products W having various dimensions. Therefore, it is not necessary to prepare the coupled transport vehicle 10 having a size corresponding to the size of the molded product W, so that the capital investment is not increased.
[0084]
For the molded product W detached from the coupled transport vehicle 10, for example, after threading or the like for providing a screw thread is performed, it is transported to a station for performing the next process in the coupled transport vehicle 10 in the same manner as described above. Then, processing is performed so that the connecting rod 1 which is the final product is obtained.
[0085]
In addition, in this Embodiment, although the molded article W of the connecting rod 1 of the same dimension was illustrated as a workpiece | work, the connecting rod from which a dimension mutually differs can also be conveyed. Also in this case, the movable plates 106 and 108 of the clamp mechanism that holds the small-sized workpiece are closed under the elastic force of the coil spring 134, while the clamp claws 96 a and 96 b of the clamping mechanism are coil springs 92. It is closed under the bullet energization. Of course, in this case, the closing positions of the movable plates 106 and 108 in the first clamping mechanism 78a and the second clamping mechanism 78b and the clamping claws 96a and 96b in the first clamping mechanism 80a and the second clamping mechanism 80b are different. become.
[0086]
Further, it is not particularly necessary to assemble the clamp mechanism and the clamping mechanism together, and at least one of the mechanisms may be present.
[0087]
Furthermore, although the first clamping mechanism 80a and the second clamping mechanism 80b are configured by the outer movable plate 106 and the inner movable plate 108, either one may be a fixed plate.
[0088]
Furthermore, it goes without saying that the workpiece is not limited to the connecting rod.
[0089]
【The invention's effect】
As described above, according to the transport vehicle according to the present invention, since the work is transported in a state in which the work is securely held, it is not necessary to place the work on a belt conveyor or the like. For this reason, the concern that the workpiece is damaged can be eliminated.
[0090]
Further, in this transport vehicle, since the work is mounted and transported at a predetermined position, the robot can reliably grip a predetermined part of the work in the next step.
[0091]
In addition, the holding member operating mechanism that operates the holding mechanism of the transport vehicle is urged by a drive mechanism installed in the transport line. That is, it is not necessary to install the drive mechanism on the transport vehicle itself. Thereby, it becomes possible to comprise a conveyance vehicle very simply.
[0092]
Furthermore, since the workpiece is held with a relatively small force, ie, a bullet urging force of the bullet member, the workpiece can be easily taken out from the transport vehicle.
[0093]
In addition, this transport vehicle can also transport a long workpiece in an upright state. For this reason, since the dimension of a horizontal direction or a depth direction can be made small, after all, a conveyance vehicle can also be comprised as a small thing.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a schematic configuration of a main part of a transport line for transferring a coupled transport vehicle according to an embodiment.
FIG. 2 is an overall schematic side view of a leading transport vehicle constituting the coupled transport vehicle according to the present embodiment.
3 is an overall schematic perspective view of the leading transport vehicle in FIG. 2. FIG.
4 is an overall schematic front view of the leading transport vehicle in FIG. 2; FIG.
FIG. 5 is an enlarged cutaway view of a main part of a leading transport vehicle showing a rack and pinion mechanism constituting a clamping mechanism.
FIG. 6 is an explanatory perspective view for explaining a configuration for attaching a chain pressing plate to a leading transport vehicle.
FIG. 7 is an enlarged side view of an essential part showing a state in which a hook member constituting a lock mechanism is engaged with a locking member.
8 is an overall schematic front view showing a state in which a clamp mechanism and a clamping mechanism of the leading transport vehicle in FIG. 2 are opened. FIG.
9 is an essential part enlarged cutaway view showing a state in which an outer movable plate and an inner movable plate are separated from each other under the action of the rack and pinion mechanism of FIG. 5;
FIG. 10 is a schematic overall perspective view of a connecting rod.
[Explanation of symbols]
1 ... Connecting rod 10 ... Linked transport vehicle
12 ... Conveying line 14 ... Rail
16 ... Chain 24 ... Air cylinder
26 ... Rod 28 ... Upper end large diameter part
30 ... Inclined part 36 ... Locking mechanism
38 ... Hook member 40 ... Bearing roller
44, 92, 134 ... Coil spring 50 ... Base plate
52 ... Under plate 54 ... Upper plate
56 ... Main body 74 ... Locking member
76a, 76b ... Pocket part 78a, 78b ... Clamp mechanism
80a, 80b ... clamping mechanism 86 ... first rod
96a, 96b ... Clamp claw 98 ... Arm member
100 ... second rod 106 ... outer movable plate
108 ... Inner movable plate 114, 116 ... Pressing rod
118 ... pinion 119 ... rack and pinion mechanism
128a ... 1st L-shaped arm member 128b ... 2nd L-shaped arm member
140 ... wheel 142 ... chain pressing plate
W ... Molded product

Claims (5)

It is a connected transport vehicle in which a plurality of transport vehicles that transport a long workpiece in an upright posture along with displacement along the transport line,
The transport vehicle includes a bunch lifting mechanism having clamp jaws to hold the workpiece,
A clamping mechanism that includes a set of plate members including at least one movable plate, and clamps a portion of the workpiece that is different from a location gripped by the gripping mechanism with the set of plate members;
And said movable plate and said clamp jaws, the holding member operating mechanism for稼moving in a direction for holding the workpiece,
A resilient member for resiliently biasing each of the clamp pawl and the movable plate in a direction opposite to the direction in which the clamp pawl and the movable plate are operated under the action of the holding member operating mechanism;
The bunch lifting mechanism, a body for supporting the clamping mechanism and the holding member operating mechanism,
An engagement member attached to the main body and engaged with a guide member constituting the transport line;
Have
Wherein the holding member operating mechanism with the Rukoto is operated the clamp jaws and the movable plate to said resilient resiliently urging direction of the member and the opposite direction under the action of the installed drive mechanism along the transport line While the clamp claws and the one set of plate members are opened, the clamp claws and the movable plate are released from the action of the holding member operating mechanism, and the clamps are subjected to the bullet urging action of the bullet members. The claw and the set of plate members are opened, and the gripping mechanism and the clamping mechanism hold the workpiece in an upright posture ,
And it is displaced while being guided along the said guide member, The connected conveyance vehicle characterized by the above-mentioned. In claim 1 Symbol mounting connection conveying vehicle, having a chain presser plate for pressing the transfer chains provided along the conveying line by being resiliently urging by the elastic member,
The transfer chain is interposed between the chain pressing plate and a guide member provided below the transfer chain,
A coupled transport vehicle, wherein the chain pressing plate is displaced along the transfer chain by receiving a force from the upper surface of the transfer chain as the transfer chain rotates . 3. The coupled transport vehicle according to claim 1, wherein when the holding member operating mechanism operates the holding member under the action of the drive mechanism, a hook member of a lock mechanism installed in the transport line is engaged. connecting the transport vehicle, characterized in that the stop member is attached to the body. The connection conveyance vehicle of any one of Claims 1-3 WHEREIN: It has a pocket part which inserts the edge part of the said workpiece | work and supports the said edge part, The connection conveyance vehicle characterized by the above-mentioned. 5. The connected transport vehicle according to claim 4 , wherein the pocket, the gripping mechanism, and the clamping mechanism are provided in the main body in this order from below, and a connecting rod that constitutes an internal combustion engine of an automobile is transported as the work. A connected transport vehicle characterized by that.

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