JP4588775B2 - Screw-driven trolley conveyor - Google Patents

Description

  The present invention relates to a screw-driven bogie transport device that rotationally drives a screw shaft having a spiral feed member on a circumferential surface and transports a transport body that engages a feed member with an engaging portion of the transport body. is there.

  Conventionally, as a transport device that transports and transports a transport body by an external driving force, a pair of rails, a screw shaft provided in parallel between the pair of rails, a wheel that travels on the rail, and a screw shaft 2. Description of the Related Art A screw-driven transfer device is known that includes a carriage-like transfer body having an engagement portion that engages with a spiral feed member, and is configured to rotate a screw shaft to move the transfer body on a rail. ing.

  As shown in FIGS. 11 to 13, these screw drive conveyance devices 500 include a pair of left and right guide rails 502 laid on a base portion 501 and screws provided in a cover body 503 between both guide rails 502. It comprises a shaft 510 and a transporting body 520 that has wheels 521 and is supported and guided by both guide rails 502 and can travel.

  The conveying body 520 is provided with an engaging roller 523 guided by the guide body 522 so as to be movable up and down, and the screw shaft 510 is provided with a spiral plate 511 spirally on the cylindrical surface. When the screw shaft 510 is rotationally driven by a drive mechanism (not shown) with the 523 engaged with the spiral plate 511 of the screw shaft 510 from above, the conveying body 520 is supported and guided by the guide rail 502 and travels.

  Further, as shown in FIG. 13, the screw drive conveyance device 500 forms the pitches P <b> 1 and P <b> 2 of the spiral plate 511 of the screw shaft 510 so as to differ depending on the part, so that the rotational speed of the screw shaft 510 is not changed. It is configured to change the traveling speed of the conveyance body 520, and the engagement roller 523 of the conveyance body 520 is moved up and down so that the spiral plate 511 and the engagement roller 523 can be engaged and disengaged. It is comprised so that driving | running | working / stop of the conveyance body 520 can be selected (for example, refer patent document 1).

  Further, in a screw drive conveying device that rotates and drives a screw shaft having a spiral feeding member on a circumferential surface, and engages the engaging portion of the conveying member with the helical feeding member to convey the conveying member, the screw shaft Are also known which are arranged in series in the transport direction.

  As shown in FIGS. 14 to 16, these screw drive conveyance devices 600 include a pair of left and right guide rails 602, a screw shaft 610 provided between both guide rails 602, and wheels 621, and both guide rails 602. The carrier 620 is supported and guided by the vehicle and can travel freely.

  A plurality of screw shafts 610 are provided along a closed-loop-shaped conveyance path 650, and a chain conveyor 604 is provided between both guide rails 602 over the entire conveyance path 605.

  The conveying body 620 is provided with an engaging roller 623, the screw shaft 610 is provided with a spiral plate 611 in a spiral shape on the cylindrical surface, and the engaging roller 623 of the conveying body 620 is provided on the spiral plate 611 of the screw shaft 610. When the screw shaft 610 is rotationally driven in an engaged state from above, the transport body 620 is supported and guided by the guide rail 602 and travels.

  Further, the carrier 620 is provided with a hook 625 that swings up and down, the dog 605 is provided on the chain conveyor 604, and the hook 625 of the carrier 620 is engaged with the dog 605 of the chain conveyor 604 from above. When the chain conveyor 604 is driven in this state, the transport body 620 is supported and guided by the guide rail 602 and travels.

The conveying operation of these screw drive conveying devices 600 will be described below.
The carrier 620 at the standby positions 651a, 651b, 651c, and 651d has the carriage roller 626 lifted by the carriage rail 606, the carriage link 627 swings upward, and the hook 625 is lifted in conjunction with the carriage 620. The conveyor 620 leaves the dog 606 of the conveyor 604 and stops.

  The transport body 620 at the standby positions 651a, 651b, 651c, and 651d is pushed by the cylinders 607a, 607b, 607c, and 607d while the screw shafts 610a, 610b, 610c, and 610d are stopped, respectively, and the insertion positions 652a, 652b, 652c, and 652d The operation is stopped in a state where the engaging roller 623 is pressed against the spiral plate 611 of the screw shafts 610a, 610b, 610c, 610d at the insertion position.

When the screw shafts 610a, 610b, 610c, and 610d are rotated in this state, the respective engagement rollers 623 are engaged with the respective spiral plates 611, and the conveyance body 620 advances by the rotation of the screw shafts 610a, 610b, 610c, and 610d. To do.
The transport body 620 is transported to the separation position 654 while stopping at the stop positions 653a to 653i and performing a predetermined work.
When reaching the disengagement position 654, the engagement roller 623 is disengaged from the screw shafts 610a, 610b, 610c, and 610d.

When the conveyance body 620 reaches the disengagement position 654, the engagement roller 623 is disengaged from the screw shafts 610a, 610b, 610c, 610d, the carriage roller 626 is disengaged from the carriage rail 606, and the carriage link 627 is swung downward. Since the hook 625 is lowered, the dog 606 of the chain conveyor 604 is engaged with the hook 625, and the conveyance body 520 moves forward by being pulled by the chain conveyor 604 (for example, see Patent Document 2).
JP-A-9-58463 (pages 3 to 4, FIG. 1, FIG. 3, FIG. 6) JP 2001-122422 A (page 4, FIG. 2, FIG. 3, FIG. 5)

  However, the conventional screw drive conveyance device 500 described in the previous section changes the traveling speed depending on the position by providing sections with different pitches, or changes the traveling speed by controlling the rotational speed of the screw shaft. Although it is possible to control the travel of the transport body, there is a problem in that the travel of each transport body cannot be controlled independently when a plurality of transport bodies are traveled simultaneously.

  In addition, the conventional screw-driven transport device 600 described in the latter stage controls the rotational speeds of the plurality of screw shafts independently, thereby causing the plurality of transport bodies to travel simultaneously, and the travel of each transport body to be performed independently. Although it is possible to perform control, when the transport body is connected between a plurality of screw shafts, it is necessary to set a section in which traveling drive by the screw shaft is not performed and to include another drive mechanism in the section. There is a problem that the entire apparatus becomes complicated.

  Furthermore, in the conventional screw drive conveyance device 600, the conveyance body needs to be temporarily stopped at the time of connection from the screw shaft to another drive mechanism when the conveyance body transfers between the screw shafts, or from another drive mechanism to the next screw shaft. There is a problem that it is difficult to carry out the transfer continuously at a high speed.

  The present invention solves the problems of the prior art as described above, that is, an object of the present invention is to run a plurality of transport bodies simultaneously and to control the travel of each transport body independently. At the same time, it is intended to provide a screw-driven bogie transport device that simplifies the configuration of the device and that the engagement roller of the transport body that travels on the wheel smoothly transfers the screw shaft and continuously transports the screw shaft.

  The invention according to claim 1 includes a plurality of screw shafts arranged in series in the conveying direction and having a spiral feed member on the circumferential surface, and a plurality of drives for independently rotating the plurality of screw shafts. A mechanism, and a carriage-like carrier that is driven by rotation of the screw shaft via an engagement roller that engages with the spiral feed member, and that is guided to travel along a guide rail by a pair of left and right wheels. In the screw drive type cart transport device provided with the above, the spiral feed member is composed of two spiral plates that are erected on the circumferential surface of the shaft main body of the screw shaft and engage with the engagement roller. The engagement rollers are held by a pair of guide bodies provided at a pair of front and rear lower portions in the traveling direction of the transport body so as to be engaged before and after the half pitch of the spiral of the screw shaft and from both the left and right sides. The drive mechanism is, by having a synchronization control means for rotating in synchronization with the rotation speed and rotation phase of the adjacent screw shaft is intended to solve the aforementioned problems.

  In the invention according to claim 2, in addition to the configuration of the screw-driven bogie transport device according to claim 1, the drive mechanism includes a motor and rotation transmission means for transmitting the rotation of the motor to the screw shaft. And the synchronization control means is a clutch capable of connecting and releasing the rotation of the adjacent rotation transmission means, thereby further solving the above-described problem.

  In the invention according to claim 3, in addition to the configuration of the screw drive type carriage transport device according to claim 2, the clutch is a single position type clutch that can be connected in only one phase per one rotation. Thus, the above-described problem is further solved.

  The screw-driven bogie transport device of the present invention includes a plurality of screw shafts arranged in series in the transport direction and having a spiral feed member on a circumferential surface, and a plurality of screw shafts that independently rotate and drive the plurality of screw shafts. A plurality of screw shafts each having a drive mechanism and a carriage-like transport body that has an engagement roller that engages with the spiral feed member and that is transported by the rotation of the screw shaft. In order to control independently, when a plurality of conveyance bodies are made to run simultaneously, it is possible to individually control the movement of the conveyance bodies by performing the control independently for each screw shaft. A special effect can be achieved.

  That is, the screw-driven bogie transport device according to the first aspect of the present invention has two spiral plates in which the spiral feed member is erected on the circumferential surface of the shaft main body of the screw shaft and engages with the engagement roller. The engagement roller is held by a guide body provided in pairs at the front and rear lower portions in the running direction of the conveyance body so that the engagement roller is engaged before and after the half pitch of the spiral of the screw shaft and from both the left and right sides. Since the mechanism has synchronous control means for rotationally driving in synchronization with the rotation speed and rotational phase of adjacent screw shafts, the engagement roller of the conveying body is connected via another drive mechanism when connecting between the screw shafts. Since it is not necessary, the engagement roller of the carrier traveling on the wheel can smoothly transfer between the screw shafts while simplifying the configuration of the apparatus, and it is not necessary to stop once for the connection. It can be conveyed continuously conveying member at a high speed.

  In addition to the effect produced by the screw-driven trolley transport device according to claim 1, the screw drive trolley transport device according to the second aspect of the present invention has a drive mechanism that transmits the motor and the rotation of the motor to the screw shaft. And the synchronization control means is a clutch capable of connecting and releasing the rotation of the adjacent rotation transmission means, thereby adding a simple configuration to the synchronization control means. Therefore, the configuration of the entire apparatus can be simplified.

  In addition to the effect of the screw-driven trolley conveying device according to claim 2, the screw-driven trolley conveying device of the invention according to claim 3 is a single that can be connected only at one phase per rotation. Since it is a position type clutch, the rotational phase of the screw shaft is synchronized only by the clutch connecting / disengaging operation, so that the synchronization control means can be further simplified.

  The present invention includes a plurality of screw shafts arranged in series in the conveying direction and having a spiral feed member on a circumferential surface, a plurality of drive mechanisms for independently rotating the plurality of screw shafts, and a spiral shape Screw-driven carriage provided with a carriage-like carriage that is driven by rotation of a screw shaft via an engagement roller that engages with a feed member of the carriage and that is guided by a pair of left and right wheels so as to be able to travel and guide the guide rail. In the conveying device, the spiral feed member is configured by two spiral plates that are erected on the circumferential surface of the shaft main body of the screw shaft and engage with the engagement roller, and the engagement roller is a half of the screw shaft spiral. The number of rotations of the screw shaft adjacent to each other is maintained by a pair of guide bodies provided in front and rear in the traveling direction of the transport body so as to be engaged before and after the pitch and from both the left and right sides. It has a synchronous control means that rotates and synchronizes the rotation phase, and allows a plurality of transport bodies to travel at the same time, independently controls the travel of each transport body, and simplifies the configuration of the apparatus while transporting. Any specific embodiment may be used as long as the body smoothly transfers the screw shaft and continuously conveys the screw shaft at a high speed.

That is, the plurality of screw shafts of the screw-driven bogie transport device of the present invention may all be the same length or different lengths as long as they are independently driven to rotate.
Also, a plurality of screw shafts having the same length may be connected and used as different lengths.
Moreover, the drive mechanism of the screw drive type trolley | bogie conveyance apparatus of this invention may be provided one by one in the screw shaft driven to rotate independently, and may be provided in multiple numbers.

  Furthermore, the synchronous control means of the drive mechanism of the screw-driven bogie transport device of the present invention may be any device that can control the number of rotations and the rotation phase, and may be a control circuit that performs all electronically, The clutch may be mechanically performed. In the case of a clutch, a fluid pressure drive clutch or an electromagnetic clutch may be used.

Below, the screw drive type trolley | bogie conveyance apparatus which is an Example of this invention is demonstrated based on drawing.
FIG. 1 is a perspective view of a screw-driven trolley transport apparatus according to an embodiment of the present invention, and FIG. 2 is a side view of the screw-driven trolley transport apparatus according to an embodiment of the present invention. 1 is a plan view of the transport body shown in FIG. 1, FIG. 4 is a front view of the transport body shown in FIG. 1, FIG. 5 is a side view of the transport body shown in FIG. FIG. 7 is a plan view of the screw-driven trolley transport apparatus according to the present embodiment, FIG. 7 is an explanatory view of the arrangement of the screw-driven trolley transport apparatus according to the present embodiment, and FIG. 8 is a diagram of the screw shaft shown in FIG. FIG. 9 is a side view, FIG. 9 is a sectional view of the screw shaft shown in FIG. 1, and FIG. 10 is a development view of the screw shaft shown in FIG.

  As shown in FIGS. 1 and 2, a screw-driven bogie transport apparatus 100 according to an embodiment of the present invention is provided on a pair of left and right guide rails 102 laid on a base portion 101 and both guide rails 102. The screw shaft 110, the wheel 121 and the carrier 120 supported and guided by the two guide rails 102, the motor 131, and the rotation transmission means 140 for transmitting the rotation of the motor 131 to the screw shaft 110. As shown in FIG. 7, a plurality of screw shafts 110 are arranged in series in the transport direction, and a plurality of drive mechanisms 130 are also provided.

  As shown in FIGS. 3 to 5, the transport body 120 includes a transport body frame 124 having wheels 121 on which articles can be placed and supported and guided by the guide rails 102. A guide body 122 having a combination roller 123 is provided.

  The engaging roller 123 is held by the guide body 122 so as to be engaged with the screw shaft 110 from the side, and the guide body 122 is provided with at least one pair in the traveling direction of the conveying body frame 124 and two pairs in the rear. Each pair of guide bodies is provided so that the engagement rollers 123 are positioned on both the left and right sides of the screw shaft 110 around a half pitch of the spiral.

  The distance between the pair of guide bodies 122A, 122B in the front in the traveling direction and the pair of guide bodies 122C, 122D in the rear in the traveling direction is such that a plurality of adjacent screw shafts 110 are arranged in series. It is set wider than the interval.

  The motor 131 is arranged at a position laterally away from the screw shaft 110, and the rotation of the motor 131 is transmitted to the screw shaft 110 by the rotation transmitting means 140. As shown in FIG. Are arranged so as to be orthogonal to the screw shaft 110, so that motors 131 for driving the adjacent screw shafts 110 are arranged adjacent to each other in parallel.

  In rotation transmission means 140, in order from the motor 131 side, the output shaft 132 of the motor 131 is connected to the gear box 141 via a joint 146, the gear box 141 is connected to the drive shaft 142 via a universal joint 144, and the drive shaft. 142 is connected to the final gear 143 via the universal joint 145, and the output of the final gear 143 is configured to drive the screw shaft 110.

  The drive shaft 142 is configured to be freely extendable and connected at both ends via universal joints 144 and 145, so that the relative positional relationship between the motor 131 and the gear box 141 that are drive sources and the screw shaft 110 is established. It can be changed according to the installation space.

  The gear box 141 is provided with a clutch shaft 147 on the adjacent rotation transmission means 140 side, and the gear ratio of the gear box 141 is set so that the clutch shaft 147 rotates at the same rotational speed as the screw shaft 110. ing.

  The clutch shaft 147 of the gear box 141 of the adjacent rotation transmission means 140 is configured to connect and release the rotation by a single position type clutch 148. At the time of release, the adjacent screw shaft 110 is connected to each motor. Rotation drive control is independently performed by 131, and at the time of connection, adjacent screw shafts 110 are driven with a predetermined rotation phase and the same rotation speed.

  Since the motor 131 and the single position type clutch 148 are installed at positions separated laterally, it is possible to provide a wall or the like that penetrates only the drive shaft 142 in the middle to isolate the transfer line from the transfer line. The motor 131 and the single position clutch 148 can be cut off from the influence of heat generation, ignition, dust generation, and the like.

Moreover, when synchronizing with the screw shaft which adjoins upstream and downstream both like screw shaft 110B, 110C, 110G, 110H shown in FIG. 7, the drive mechanism 130 is provided in the both sides of the screw shaft 110, and each drive mechanism 130 is provided. Are configured to be able to synchronize with the drive mechanism 130 of the adjacent screw shaft 110.
In this case, one of the drive mechanisms 130 on both sides may omit the motor 131 and have only the rotation transmission means 140.

As shown in FIGS. 8 to 10, the screw shaft 110 has spiral plates 111 </ b> A and 11 </ b> B standing in a spiral manner on the circumferential surface of a cylindrical shaft body 112.
The two spiral plates 111 </ b> A and 111 </ b> B that engage with the engagement roller 123 are provided at a constant interval, and the gap functions as a spiral groove 113 with which the engagement roller 123 of the transport body 120 is engaged.

At both ends of the screw shaft 110, end plates 111 </ b> C continuous with the two spiral plates 111 </ b> A and 111 </ b> B are provided so as to close portions other than the ends of the spiral groove 113.
Further, the end plate 111C has a slight spiral shape smaller than the pitch of the two spiral plates 111A and 111B.
The operation of the screw-driven trolley transport apparatus according to the embodiment of the present invention configured as described above will be described below.
As shown in FIG. 7, screw shafts 110A, 110B, 110C, 110D, 110E, 110F, 110G, 110H, and 110J are arranged in series from the upstream side. The screw shaft 110A has a drive mechanism 130A on the downstream side and a screw shaft. 110B, 110C, 110G, and 110H have drive mechanisms 130B1, 130B2, 130C1, 130C2, 130G1, 130G2, 130H1, and 130H2 on both upstream and downstream sides, and the screw shaft 110J has a drive mechanism 130J on the upstream side, and the screw shaft 110D. , 110E, 110F are directly coupled to each other and rotate together, and a drive mechanism 130D is provided upstream of the screw shaft 110D, and a drive mechanism 130F is provided downstream of the screw shaft 110F.

  Drive mechanisms 130A and 130B1, 130B2 and 130C1, 130C2 and 130D, 130F and 130G1, 130G2 and 130H1, 130H2 and 130J are provided adjacent to each other, and single position clutches 148AB, 148BC, 148CD, 148FG, 148GH, and 148HJ. It is comprised so that rotation may be connected and released.

  First, when the transport body 120 is transported from the upstream (left side in the drawing) by the screw shaft 110A, the single-position clutch 148AB is connected before the engagement roller 123A at the tip of the transport body 120 reaches the screw shaft 110B. The drive mechanisms 130A and 130B1 drive the screw shafts 110A and 110B at the same rotational speed.

  At this time, the screw shafts 110A and 110B are fixed to a predetermined rotational phase by the single position clutch 148AB, and the pair of guide bodies 122A and 122B in the traveling direction of the transport body 120 and the pair in the rear in the traveling direction. Since the distance between the guide bodies 122C and 122D is set wider than the distance between the two adjacent screw shafts 110, the engagement rollers 123C and 123D at the rear end of the conveying body 120 are formed by the spiral groove 113 of the screw shaft 110A. In the running state, the engagement rollers 123A and 123B at the tip smoothly engage with the spiral groove 113 of the screw shaft 110B.

  When the conveyance body 120 further travels and the engagement roller 123D at the rear end disengages the spiral groove 113 of the screw shaft 110A, the single-position clutch 148AB is released, and the travel of the conveyance body 120 becomes independent by the drive mechanisms 130B1 and 130B2. Control.

  Next, before the engagement roller 123A at the tip of the transport body 120 reaches the screw shaft 110C, the single position clutch 148BC is connected, and the drive mechanisms 130B2 and 130C1 drive the screw shafts 110B and 110C at the same rotational speed. .

  Then, in a state where the engagement roller 123D at the rear end of the conveyance body 120 travels by the spiral groove 113 of the screw shaft 110B, the engagement rollers 123A and 123B at the front end smoothly engage with the spiral groove 113 of the screw shaft 110C. When the conveying body 120 further travels and the engagement roller 123D at the rear end leaves the spiral groove 113 of the screw shaft 110B, the single position type clutch 148BC is released.

  By performing these operations at the time of connecting each screw shaft 110, the conveying body 120 can smoothly transfer the screw shaft 110 and can be continuously conveyed at high speed while simplifying the configuration of the apparatus. The effect is enormous.

  In the above embodiment, the screw shafts 110 having the same length are appropriately combined depending on the section in which the traveling of the transport body 120 is independently controlled. However, screw shafts having different lengths may be arranged.

  In addition, the rotation speed and rotation phase of the adjacent screw shaft 110 are simultaneously synchronized using a single position clutch 148, but the rotation timing of the screw shaft 110 is detected using a normal clutch to control the connection timing. By doing so, the rotational speed and the rotational phase may be synchronized, or the rotational speed and rotational phase of the screw shaft 110 may be detected and controlled by controlling the motor 131 without using a clutch.

The perspective view of the screw drive type trolley | bogie conveyance apparatus which is one Example of this invention. The side view of the screw drive trolley | bogie conveyance apparatus which is one Example of this invention. The top view of the conveyance body shown in FIG. The front view of the conveyance body shown in FIG. The side view of the conveyance body shown in FIG. The top view of the screw drive trolley | bogie conveyance apparatus which is one Example of this invention. The arrangement explanatory view of the screw drive trolley carrier which is one example of the present invention. The side view of the screw shaft shown in FIG. Sectional drawing of the screw shaft shown in FIG. FIG. 2 is a development view of the screw shaft shown in FIG. 1. The perspective view of the conventional screw drive conveyance apparatus. Sectional drawing of the conventional screw drive conveyance apparatus. The side view of the conventional screw drive conveyance apparatus. Sectional drawing of the other conventional screw drive conveyance apparatus. Arrangement explanatory drawing of the other conventional screw drive conveyance device. Side surface explanatory drawing of the other conventional screw drive conveyance apparatus.

DESCRIPTION OF SYMBOLS 100 ... Screw drive trolley | bogie conveyance apparatus 101 ... Base part 102 ... Guide rail 110 ... Screw shaft 111 ... Spiral plate 112 ... Shaft body 113 ... Spiral groove 120 ... Transport body 121 ・ ・ ・ Wheel 122 ・ ・ ・ Guide body 123 ・ ・ ・ Engagement roller 124 ・ ・ ・ Transport body frame 130 ・ ・ ・ Drive mechanism 131 ・ ・ ・ Motor 132 ・ ・ ・ Output shaft 140 ・ ・ ・ Rotation transmission Means 141 ... Gear box 142 ... Drive shaft 143 ... Final gear 144 ... Universal joint 145 ... Universal joint 146 ... Joint 147 ... Clutch shaft 148 ... Single position type clutch 500, 600 ... Screw drive conveying device 501 ... Base part 502, 602 ... Guide rail 503 ... Cover body 604 ... Chain conveyor 605 ... Dog 606 ... Carriage rail 607 ... Cylinder 510,610 ... Screw shaft 511, 611 ... Spiral plate 520, 620 ... Conveyance Body 521, 621 ... Wheel 522 ... Guide body 523, 623 ... Engagement roller 624 ... Carriage 625 ... Hook 626 ... Carriage roller 627 ... Carriage link 650 ... Conveyance Path 651 ... Standby position 652 ... Insertion position 653 ... Stop position 654 ... Release position

Claims (3)

A plurality of screw shafts arranged in series in the conveying direction and having a spiral feed member on the circumferential surface, a plurality of drive mechanisms for independently rotating the plurality of screw shafts, and the spiral feed member A screw-driven carriage transporting device that is driven by rotation of the screw shaft through an engagement roller that engages with a carriage and that is transported in a guide-guide manner on a guide rail by a pair of left and right wheels. In
The spiral feed member is composed of two spiral plates that are erected on the circumferential surface of the shaft main body of the screw shaft and engage the engagement roller,
The engagement rollers are held by a pair of guide bodies provided at a pair of front and rear lower portions in the traveling direction of the transport body so as to be engaged before and after the half pitch of the spiral of the screw shaft, respectively,
The screw drive type bogie transport device, wherein the drive mechanism has a synchronous control means for rotating and driving by rotating the rotation speed and rotation phase of adjacent screw shafts. The drive mechanism is composed of a motor and rotation transmission means for transmitting rotation of the motor to the screw shaft,
2. The screw-driven bogie transport apparatus according to claim 1, wherein the synchronization control means is a clutch capable of connecting and releasing the rotation of the adjacent rotation transmission means.   The screw-driven trolley conveying device according to claim 2, wherein the clutch is a single position type clutch that can be connected only in one phase per one rotation.

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