JP5383333B2 - Chain conveyor equipment - Google Patents

Description

  The present invention can engage and disengage a carriage that can be guided by a traveling rail, a conveyor chain that is guided by a guide rail provided below the traveling rail, and that is driven to circulate, and the conveyor chain and the carriage. In particular, a chain conveyor apparatus suitable for a conveying means of a production line that performs assembly, processing, painting, etc. that require accurate speed control and positioning control while conveying a workpiece by a carriage. About.

  Conventionally, a cart that can be guided by a traveling rail and a conveyor chain that is circulated and guided by a guide rail provided below the traveling rail are engaged by an engaging means provided on the conveyor chain and the cart. A chain conveyor apparatus in which a conveyor chain pulls and conveys a carriage is known.

  In order to prevent irregular fluctuations in the transport speed and position of the carriage and unintentional runaway caused by changes in the speed and tension of the conveyor chain and play in the engagement means, the carriage can be used as an engagement means for the conveyor chain. A chain conveyor apparatus provided with a pressing member for pressing the engaging means from the rear side in the traveling direction is known.

  As shown in FIG. 8, the known chain conveyor apparatus 500 includes a conveyor chain 510 that is supported by guide rails (not shown) by side rollers 512 that are attached to both sides of the connecting portion of the chain link 511 and is circulated. A carriage 520 supported by a traveling rail (not shown) and capable of traveling, and an engaging means 530 for engaging the conveyor chain 510 and the carriage 520 are provided.

  The engaging means 530 includes a propelling member 531 and a pressing member 532 provided on the conveyor chain 510, and an engaging member 521 provided on the carriage 520.

  The propulsion member 531 and the presser member 532 are pivotally supported by pins 515 on brackets 513 and 514 fixed to the upper portion of the chain link 511 at an appropriate interval. It is held at the engagement position facing the C shape.

  The engagement member 521 is attached to the lower part of the carriage 520, the tip of the propulsion member 531 hits the rear surface of the engagement member 521, the carriage 520 is pushed, and the tip surface of the presser member 532 is pushed to the lower front of the engagement member 521. The escape of the cart 520 is prevented (see Patent Document 1).

Japanese Utility Model Publication No. 62-150415 microfilm (see especially page 4-6, FIGS. 1 to 3)

However, in such a known conventional chain conveyor device 500, the propelling member 531 and the pressing member 532 which are the engaging means 530 on the conveyor chain 510 side are provided in different chain links 511. The accuracy of the gap between the propelling member 531 and the pressing member 532 is low due to the inevitable gap, and the conveyance speed and position of the carriage 520 due to changes in the speed and tension of the conveyor chain 510, play of the engaging means, etc. still remain. There was a problem that regular fluctuations occurred.
This is a particularly serious problem when performing so-called constant-pitch tact transport, in which the carriage 520 is transported to a predetermined place at regular time intervals.

  In addition, when the conveyor chain 510 is bent horizontally, the distance between the propelling member 531 and the pressing member 532 provided in different chain links 511 is further greatly changed, so that the chain conveyor having a path curved in the horizontal direction. There is a problem that the apparatus 500 cannot be applied.

  In addition, when the chain conveyor device 500 is applied to robot painting, high-accuracy stop control is required, so that positioning control means and sensors are necessary, and the apparatus configuration is complicated. There is a problem that the paint sticks and malfunctions or the maintenance work load increases.

Further, since it takes time to position the carriage 520 and the engaging means 530, there is a problem that the conveyance time is prolonged.

  Furthermore, when a plurality of circulation driven conveyor chains are arranged in series and different processes are performed continuously, when the carriage of one process reaches the end of the transfer path, the workpiece is transferred to the carriage of the next process and emptied. The cart that has become necessary needs to reversely rotate the conveyor chain and return it to the beginning of the conveyance path, and there is a problem that the conveyance time is prolonged and the running cost is increased.

  Therefore, the technical problem to be solved by the present invention, that is, the object of the present invention is to fix the presser claw on the cart side until the dog on the conveyor chain side and the engagement claw on the cart side approach and the engagement is completed. When engagement is completed without interfering with the dog on the cart side, the rear of the dog is pressed to prevent irregular fluctuations in the conveyance speed and position of the cart due to play of the engagement means, and the curve is horizontal. The object is to provide a chain conveyor device that performs constant pitch tact conveyance that prevents irregular fluctuations in the conveyance speed and position of the carriage on the route.

  A further object of the present invention is to provide a chain conveyor device that eliminates the need for positioning control means and sensors, simplifies the apparatus configuration, reduces malfunctions, and reduces the burden of maintenance work.

  Another object of the present invention is to connect a carriage between each conveyor chain by increasing the conveying accuracy of each conveyor chain when a plurality of circulation driven conveyor chains are arranged in series and different processes are performed continuously. It is possible to provide a chain conveyor device suitable for so-called constant pitch tact conveyance.

  First, the invention according to claim 1 is a cart that can be guided and traveled by a traveling rail, a conveyor chain that is guided and guided by a guide rail provided below the traveling rail, and the conveyor chain. In a chain conveyor apparatus for carrying out constant pitch tact conveyance, the engaging means for engaging and disengaging the carriage and a driving means for driving the conveyor chain, wherein the engaging means is a dog provided on the conveyor chain. And a presser claw pivotally supported on a swinging shaft provided on the rear side in the traveling direction from the dog of the cart and a swinging shaft forwardly supported on the swinging shaft so as to swing upward and downward. The dog rear surface of the dog has an obtuse angle with the dog upper surface of the dog, and is substantially similar to the swinging orbit of the tip of the presser claw when engaged with the engagement claw. Curved surface shape By having a, in which to solve the problems described above.

  The invention according to claim 2 is the chain conveyor device according to claim 1, wherein the engaging claw has a presser claw stopper that regulates a lower limit of swinging of the presser claw. It solves the problem further.

  The invention according to claim 3 is the chain conveyor device according to claim 1 or 2, wherein the guide rail is in contact with the traveling rail in a region where the engagement between the conveyor chain and the carriage is started. By arranging so that the interval is gradually narrowed, the above-described problems are further solved.

  According to a fourth aspect of the present invention, in the chain conveyor apparatus according to any one of the first to third aspects, the carriage has an engagement claw stopper that regulates a lower limit of swing of the engagement claw. Thus, the above-described problems are further solved.

The invention according to claim 5 further solves the above-mentioned problem in the chain conveyor apparatus according to any one of claims 1 to 4, wherein the drive means is a servo motor. It is.
Here, the servo motor is a motor that incorporates a rotation detector (encoder). This encoder detects the rotation angle and rotation speed of the motor shaft, and performs the specified pulse and comparative specified feedback control to stop the motor. It has the features of high accuracy and positioning accuracy and stopping at the specified position with high accuracy.

The invention according to claim 6 is the chain conveyor apparatus according to any one of claims 1 to 5, wherein the conveyor chain is a needle bush chain, thereby further solving the above-described problem. is there.
Here, the needle bushing chain is a chain in which a plurality of rolling elements (needles) are incorporated between the roller and the bushing of the chain, and initial wear elongation occurs slightly at the start of operation, but subsequent wear elongation It does not occur.

  The chain conveyor device of the present invention engages a carriage that can be guided and traveled by a traveling rail, a conveyor chain that is guided and circulated by a guide rail provided below the traveling rail, and the conveyor chain and the carriage. -By having engagement means that can be disengaged and drive means for driving the conveyor chain, it is possible to adjust the transport speed and position according to the transport section without providing a drive device or control device for each individual carriage. Control becomes possible and the special effect corresponding to the following unique structures can be produced.

  That is, according to the chain conveyor apparatus according to the first aspect of the present invention, the engaging means can swing up and down on the dog provided on the conveyor chain and the swing shaft provided on the rear side in the traveling direction from the dog of the carriage. By means of an engaging means on the carriage side. Since the distance between a certain engaging claw and presser claw can be arranged with high accuracy, it is possible to prevent irregular fluctuations in the transport speed and position of the carriage caused by changes in the speed and tension of the conveyor chain and play in the engaging means. Since the dog, which is the engagement means on the conveyor chain side, is provided on one chain link, and the distance between the engaging claw and the presser claw is not changed by horizontal bending, the carriage can be transported even on a horizontal curved path. Irregular speed and position It is possible to prevent variation, it is possible to constant pitch tact transport.

  In addition, the dog rear surface of the dog has an obtuse angle with the dog upper surface of the dog and has a curved surface shape substantially similar to the swinging trajectory of the presser claw tip when engaged with the engagement claw. The presser claw does not interfere with the dog until the dog and the engaging claw approach and the engagement is completed, and the presser claw presses the rear of the dog when the engagement is completed. The play of the trolley is reduced, and irregular fluctuations in the transport speed and position of the carriage caused by play of the engaging means can be prevented.

  Moreover, according to the chain conveyor apparatus which concerns on this invention 2, in addition to the effect which the chain conveyor apparatus which concerns on Claim 1 show | plays, an engagement nail | claw has a stopper which controls the rocking | fluctuation lower limit of a press nail, Since the lower limit of the swinging movement of the presser claw with respect to the engaging claw is regulated by a stopper provided on the engaging claw, the dog can pass smoothly at the start of engagement, etc., and the speed change and tension change of the conveyor chain can be prevented. Can be reduced.

  Moreover, according to the chain conveyor apparatus which concerns on this Claim 3, in addition to the effect which the chain conveyor apparatus which concerns on Claim 1 or Claim 2 show | plays, the area | region where a guide rail starts engagement with a conveyor chain and a trolley | bogie Since the dog is in contact with the engaging claw that swings downward and gradually rises to the position at the time of conveyance, the distance from the traveling rail is gradually reduced. While being able to contact the engaging claw, the presser claw can be surely positioned behind the dog, and the speed change and tension change of the conveyor chain can be reduced.

  Furthermore, according to the chain conveyor apparatus according to the fourth aspect, in addition to the effect exerted by the chain conveyor apparatus according to any one of the first to third aspects, the carriage regulates the lower limit of swing of the engaging claw. By having the engaging claw stopper, the amount of the engaging claw swinging upward before the dog engages with the engaging claw is reduced, and the dog and the engaging claw can be smoothly contacted and engaged, Since the lower limit of the swing of the presser claw restricted by the presser claw stopper provided on the engagement claw is also restricted, the amount of upward swing when the dog passes through the presser claw is reduced, so that the engagement claw is smoothly engaged. It is possible to reduce the speed change and tension change of the conveyor chain.

  Moreover, according to the chain conveyor apparatus which concerns on this 5th aspect, in addition to the effect which the chain conveyor apparatus which concerns on any one of Claim 1 thru | or 4, there exists a conveyor means by a drive means consisting of a servomotor. Therefore, the positioning control means and the sensor are not required, the apparatus configuration can be simplified, the malfunction can be reduced, and the maintenance work load can be reduced.

  And according to the chain conveyor apparatus which concerns on this invention 6, in addition to the effect which the chain conveyor apparatus which concerns on any one of Claims 1 thru | or 5 show | plays, since a conveyor chain is a needle bush chain, a conveyor Since wear elongation does not occur on the chain, when multiple conveyor belts that are driven in circulation are arranged in series and different processes are performed continuously, the conveyance accuracy of each conveyor chain is improved, and the transfer of the carriage between the conveyor chains is improved. This makes it possible to realize a chain conveyor device suitable for tact conveyance.

  The chain conveyor device of the present invention engages a carriage that can be guided and traveled by a traveling rail, a conveyor chain that is guided and circulated by a guide rail provided below the traveling rail, and the conveyor chain and the carriage. -It has an engaging means that can be detached and a driving means that drives the conveyor chain, and the engaging means is a dog provided on the conveyor chain and a swing provided on the rear side in the traveling direction from the dog of the carriage. A dog rear surface of the dog having a presser claw pivotally supported on the shaft so as to be swingable in the vertical direction and an engaging claw pivotally supported on the swing shaft so as to be swingable in the vertical direction and engaging in the forward direction of the dog. However, it has an obtuse angle with the dog upper surface of the dog and has a curved surface shape similar to that of the swinging track at the tip of the presser claw when engaged with the engaging claw. The dog on the conveyor chain side and the engaging claw on the cart side Until the engagement is complete. By pressing the rear of the dog when the engagement is completed without causing the pawl to interfere with the cart on the cart side, irregular fluctuations in the cart transport speed and position due to play of the engagement means are prevented, and the horizontal direction Any specific embodiment may be used as long as it can prevent irregular fluctuations in the conveyance speed and position of the carriage even on a curved path and enables constant pitch tact conveyance. Absent.

  For example, the chain conveyor device of the present invention is used as a workpiece lifting type conveyor device in which a workpiece is supported on a carriage, or as a workpiece suspension type conveyor device in which a workpiece is suspended under a carriage. Even if it exists, there is no problem in the carrying operation and the engaging / disengaging operation between the conveyor chain and the carriage.

  Further, the chain conveyor apparatus of the present invention may be used for any application, and in particular, a constant pitch tact conveyance that is carried out continuously while conveying processes such as pretreatment, spraying, and drying that require accurate speed and positioning. It is suitable for use in a robot painting line of the type.

An embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 is an overall side view of a chain conveyor apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged side view of a portion II in FIG. 1, and FIG. FIG. 4 is a cross-sectional view taken along line -III, FIG. 4 is an explanatory view at the start of engagement in the engagement start region of the chain conveyor device of this embodiment, and FIG. 5 is a diagram of the chain conveyor device of this embodiment. FIG. 6 is an explanatory diagram in the middle of engagement in the joint start region, FIG. 6 is an explanatory diagram when the engagement is completed in the engagement start region of the chain conveyor device of the present embodiment, and FIG. It is explanatory drawing at the time of engagement cancellation | release in the isolation | separation area | region of a chain conveyor apparatus.

  As shown in FIGS. 1 to 3, a chain conveyor device 100 according to an embodiment of the present invention includes a carriage 120 that can be guided by a traveling rail 101 and a guide rail 102 that is provided below the traveling rail 101. The conveyor chain 110 guided and circulated is engaged by the engagement means 130 that enables the conveyor chain 110 and the carriage 120 to be engaged and disengaged, so that the conveyor chain 110 pulls and conveys the carriage 120. It is configured.

  The distance between the traveling rail 101 and the guide rail 102 gradually decreases in the engagement start region L1 where the engagement between the conveyor chain 110 and the carriage 120 starts, and is parallel in the transfer region L2, and the conveyor chain 110 and the carriage 120 The disengagement region L3 is released so as to gradually become wider.

  As shown in FIG. 3, the traveling rail 101 is composed of a pair of U-shaped rails arranged with the open sides facing each other, and the guide rail 102 has at least open sides from the engagement start region L1 to the disengagement region L3. It consists of a pair of U-shaped rails arranged opposite to each other.

  As shown in FIG. 1, the carriage 120 is connected to a front carriage 121 having an engagement means 130 and a rear carriage 122 having a conveyed product holding means 123 so as to be bent in a horizontal direction via a coupling means 124. The front carriage 121 engaged with 110 by the engaging means 130 is configured to pull the rear carriage 122.

  As shown in FIG. 2 and FIG. 3, the front carriage 121 and the rear carriage 122 are arranged between a running roller 125 that runs inside a U-shaped cross section of the running rail 101 in the front and rear and an open side facing the running rail 101. A guide roller 126 that is pivotally supported perpendicular to the traveling direction of the carriage 120 is provided, and is configured to travel along the traveling rail 101.

In the conveyor chain 110, a large number of chain links 111 are connected endlessly so as to be bent by pins 115, side rollers 112 are provided on both sides of the pins 115, and the side rollers 112 have an internal U-shaped cross section of the guide rail 102. The vehicle is driven along the guide rail 102 at least from the engagement start region L1 to the disengagement region L3. As shown in FIG. 1, the conveyor chain 110 is hung between a driven sprocket 182 and a drive sprocket 184 to form an endless circular track.
Then, the servo motor 170 connected to the rotating shaft of the drive sprocket 184 performs highly accurate speed control and stop control on the conveyor chain 100.

Further, by using a needle bushing chain in which a plurality of rolling elements (needles) are incorporated between the roller and the bushing in the conveyor chain 110, positional deviation due to chain elongation is reduced.
A synergistic effect with the high-accuracy stop control by the servo motor 170 described above eliminates the need for a stopper for stopping the carriage, which has been indispensable for realizing the stop accuracy required for robot painting.

  As shown in FIGS. 2 and 3, the engaging means 130 includes a dog 131 fixedly erected on the carriage side of the chain link 111 at an appropriate interval of the conveyor chain 110, and a swing shaft on the front carriage 121. An engaging claw 132 and a presser claw 133 provided so as to be swingable in the vertical direction via 134 are provided.

  The lower limit of the swing of the engaging claw 132 is regulated by the engaging claw stopper 135 provided on the front carriage 121, and the lower limit of the swing of the presser claw 133 is controlled by the presser claw stopper 137 provided on the engaging claw 132. It is regulated.

In this embodiment, the carriage 120 includes the front carriage 121 and the rear carriage 122, but naturally one carriage may include both the engaging means and the transported article holding means.
Hereinafter, it will be described as a cart 120.

Next, the detail of each structure of the engaging means 130 is demonstrated based on FIG. 2 thru | or FIG.
The engaging claw 132 is supported by a swinging shaft 134 provided on the carriage 120 and extends forward, and its front end is bent downward and engages with the dog 131. The engaging surface 151 of the claw lower surface 152 and the downward bent portion is configured to form an acute angle β (see FIG. 2).
Further, an engaging claw swing restricting portion 138 is provided above the portion extending forward, and the lower limit of the swing of the engaging claw 132 with respect to the cart 120 is in contact with the engaging claw stopper 135 provided on the cart 120. It is regulated.
Further, a push-up portion 136 protruding left and right in the transport direction is formed at the tip of the portion bent downward of the engaging claw 132.

  The presser claw 133 is supported by a swing shaft 134 provided on the carriage 120 and extends forward, and the rear end surface of the engagement claw 132 functions as a presser claw stopper 137, and the presser claw 133 is more than the swing shaft 134. The rear part abuts against the presser claw stopper 137 and the lower limit of swinging of the presser claw 133 with respect to the engaging claw 132 is regulated.

  The dog 131 is fixedly erected on the carriage 120 side of the chain link 111, the dog upper surface 142 is a plane parallel to the line connecting the pins 115 of the chain link 111, and the dog front surface 141 abutting on the engaging claw 132 is The dog upper surface 142 and an acute angle plane, and the dog rear surface 143 contacting the presser claw 133 have a curved surface similar to the arc trajectory at the tip of the presser claw 133 at an obtuse angle with the dog upper surface 142.

As shown in FIG. 6, an acute angle α formed by the dog front surface 141 and the dog upper surface 142 (see FIG. 2).
Is smaller than an acute angle β (see FIG. 2) formed by the engagement claw lower surface 152 and the engagement surface 151, and the corner portions of both are formed in an R shape.

  Next, the engaging and releasing operations of the engaging means 130 will be described with reference to FIGS.

  First, at the position where the distance between the start point of the engagement start region L1, that is, the center line of the pin 115 of the conveyor chain 110 and the center line of the swing shaft 134 provided on the carriage 120 is R1, which is the farthest, The dog 131 approaches the engaging claw 132 from the upstream side (the left side in the drawing) by driving the conveyor chain 110.

When the dog 131 approaches, the dog claw 133 swings slightly upward and passes through, and the dog front surface 141 comes into contact with the engagement surface 151 of the engagement claw 132, resulting in the state shown in FIG.
At this time, the distance between the center line of the pin 115 of the conveyor chain 110 and the center line of the swing shaft 134 provided on the carriage 120 is separated, and the swing lower limit of the presser pawl 133 is regulated by the presser pawl stopper 137. Therefore, the impact when the dog 131 comes into contact with the presser claw 133 is extremely small.

When the dog 131 advances (to the right in the drawing), the dog 131 pushes the engagement claw 132, and the carriage 120 reaches the midpoint of the engagement start region L1 and enters the state shown in FIG.
At this time, the distance between the center line of the pin 115 of the conveyor chain 110 and the center line of the swing shaft 134 provided on the carriage 120 gradually decreases to R2, and during this time, the dog 131 moves forward and rises. The acute angle α (see FIG. 2) formed by the front surface 141 and the dog upper surface 142 is
The propulsive force that the dog 131 exerts on the engagement claw 132 is smaller than the acute angle β (see FIG. 2) formed by the engagement claw lower surface 152 and the engagement surface 151, and the propulsive force that causes the engagement claw 132 to swing downward. Therefore, the dog 131 and the engaging claw 132 are not disengaged.

  Further, as the dog 131 rises, the tip of the presser claw 133 approaches the dog 131, but the dog rear surface 143 has an obtuse angle with the dog upper surface 142 and forms a curved surface similar to the arc locus of the tip of the presser claw 133. Therefore, the presser claw 133 does not come into contact with the dog 131.

Further, when the dog 131 advances (rightward in the drawing), the dog 131 pushes the engagement claw 132, the carriage 120 reaches the final point of the engagement start region L1, and is in the state shown in FIG.
At this time, the distance between the center line of the pin 115 of the conveyor chain 110 and the center line of the swing shaft 134 provided on the carriage 120 is gradually narrowed to R3. During this time, the dog 131 moves forward and rises, and finally the dog The upper surface 142 and the engaging claw lower surface 152 abut.

As the dog 131 rises, the tip of the presser claw 133 further approaches the dog 131, the tip of the presser claw 133 comes into contact with the rear surface 143 of the dog and presses the dog 131 from the rear in the advancing direction. Eliminate play.
Note that, due to a dimensional error during manufacturing, the tip of the presser claw 133 may have a slight gap at the position indicated by the solid line in FIG. 6 or may contact the dog rear surface 143 at the position indicated by the dotted line. In either case, the play of the engaging means is extremely reduced, and the effect of preventing irregular fluctuations in the transport speed and position of the carriage 120 due to play and the like can be achieved.

  In the conveyance region L2 following the engagement start region L1, the dog 131 and the engaging claw 132 are engaged in the state shown in FIG. 6, and the tip of the presser claw 133 presses the dog 131 from the rear in the advancing direction. When the conveyor chain 110 is driven, the carriage 120 is smoothly pulled and conveyed.

  The disengagement of the engagement means 130 in the disengagement region L3 is in the state of FIG. 6 at the starting point of the disengagement region L3, contrary to the engagement operation in the engagement start region L1, and the dog 131 advances (right of the drawing). Direction), the dog 131 propels the engaging claw 132, the carriage 120 reaches the intermediate point of the disengagement region L3, and is in the state shown in FIG. 5, and when the dog 131 advances (to the right in the drawing), the dog 131 is engaged. By driving the pawl 132, the carriage 120 reaches the final point of the separation region L3 and enters the state shown in FIG.

Then, as shown in FIG. 7, the disengagement member 160 at the position where the distance between the center line of the pin 115 of the conveyor chain 110 and the center line of the swing shaft 134 provided on the carriage 120 is the farthest R1. The engagement between the engagement claw 132 and the dog 131 is released by pushing up the push-up portion 136 provided at the tip of the engagement claw 132 and swinging the engagement claw 132 upward.
At this time, as shown in FIG. 4, the dog 131 is in a lowered position with respect to the engaging claw 132, and the tip of the presser claw 133 is in a position away from the dog 131. Even if the presser claw 133 swings upward together with the engaging claw 132 when swinging, it does not interfere with the dog 131.

The carriage 120 disengaged from the conveyor chain 110 is guided and moved by the pusher mechanism (not shown) in the connecting area L4, and in the engagement start area L1 of the adjacent conveyor chain 110, as described above. The carriage 120 and the conveyor chain 110 are engaged by the engaging means 130 by the same operation as described above.
Therefore, the work of removing the workpiece from the carriage 120 that has reached the final point of the disengagement area L3 and returning the empty carriage 120 to the start point of the engagement start area L1 becomes unnecessary, and the conveyance time is greatly shortened. it can.

In this embodiment, the disengagement of the engagement means 130 in the disengagement region L3 is performed at the final point of the disengagement region L3. As long as the presser pawl 133 swings upward together with the engaging pawl 132 when swinging 132 upward, it may be an intermediate point of the separation region L3 as long as it does not interfere with the dog 131.
Further, the disengagement member 160 may move up and down to selectively disengage any cart 120, and is fixedly provided on the route and automatically moves with the travel of the cart 120. The engagement of the carriage 120 may be released.

  As described above, the chain conveyor device of the present invention includes a carriage that is guided by the traveling rail and can travel, a conveyor chain that is guided by the guide rail provided below the traveling rail and is circulated, and a conveyor chain. Engaging means for enabling engagement and disengagement with the carriage, and the engaging means is a dog provided on the conveyor chain, and an engagement claw provided on the carriage that engages in the forward direction of the dog; A presser claw provided so as to be able to swing in the vertical direction by a swing shaft provided on the rear side in the advancing direction from the dog of the carriage, and the dog rear surface of the dog has an obtuse angle with the dog dog upper surface and the engagement Conveying the carriage due to changes in the speed and tension of the conveyor chain, play of the engaging means, etc., by having a curved surface that is almost similar to the swinging orbit of the tip of the presser claw when engaged with the claw Irregular speed and position Do prevents fluctuations, can also prevent irregular fluctuation of the conveying speed and the position of the carriage in a path which is curved in the horizontal direction, suitable for use in the constant pitch tact transport.

  In addition, the chain conveyor apparatus of the present invention employs a needle bushing chain that does not stretch as a conveyor chain, and is driven by a servo motor capable of speed control and stop control with high accuracy. The stopping accuracy can be dramatically improved without using a, reducing malfunctions, reducing the burden of maintenance work, enabling smooth transfer of the carriage between endless circulation tracks of adjacent conveyor chains, etc. The effect is tremendous.

BRIEF DESCRIPTION OF THE DRAWINGS The whole side view of the chain conveyor apparatus which is one Example of this invention. The side view which expanded the II section of FIG. Sectional drawing in the III-III line of FIG. Explanatory drawing at the time of the engagement start in the engagement start area | region of this invention. Explanatory drawing in the middle of engagement in the engagement start area | region of this invention. Explanatory drawing at the time of completion of engagement in the engagement start area | region of this invention. Explanatory drawing at the time of engagement cancellation | release in the detachment | leave area | region of this invention. The whole side view of the conventional chain conveyor apparatus.

DESCRIPTION OF SYMBOLS 100, 500 ... Chain conveyor apparatus 101 ... Traveling rail 102 ... Guide rail 110, 510 ... Conveyor chain 111,511 ... Chain link 112, 512 ... Side roller 513 ... Bracket 514 ... Brackets 115, 515 ... Pins 120, 520 ... Carriage 121 ... Front car 122 ... Back car 123 ... Conveyed material holding means 124 ... Connection means 125 ... Traveling Roller 126 ... guide roller 521 ... engagement member 130, 530 ... engagement means 131 ... dog 132 ... engagement claw 133 ... presser claw 134 ... swing shaft 135 .... Engagement claw stopper 136 ... Push-up part 137 ... Presser claw stopper 138 ... Engagement claw swing restricting part 531 ... Propulsion part Material 532 ... Holding member 533 ... Weight part 141 ... Dog front face 142 ... Dog upper face 143 ... Dog rear face 151 ... Engagement face 152 ... Engagement claw lower face 103 ... -Engagement start area 104 ... Transport area 105 ... Disengagement area 160 ... Engagement release member 170 ... Servo motor 182 ... Driven sprocket 184 ... Drive sprocket L1 ... Start of engagement Area L2 ... Transport area L3 ... Detach area L4 ... Transfer area

Claims (6)

A cart capable of traveling by being guided by a travel rail, a conveyor chain guided by a guide rail provided below the travel rail and driven to circulate, and a mechanism capable of engaging and disengaging the conveyor chain and the cart In a chain conveyor apparatus for carrying out constant pitch tact conveyance having a combination means and a drive means for driving the conveyor chain,
The engaging means includes a dog provided on the conveyor chain and a presser claw pivotally supported on a swinging shaft provided on the rear side in the advancing direction from the dog of the carriage, and a vertical direction on the swinging shaft. An engaging claw that is pivotally supported and engages the front of the dog in the traveling direction;
The dog rear surface of the dog has an obtuse angle with the dog upper surface of the dog and has a curved surface shape substantially similar to the swinging track of the tip of the presser claw when engaged with the engagement claw. Chain conveyor device.   The chain conveyor apparatus according to claim 1, wherein the engagement claw includes a presser claw stopper that regulates a lower limit of swinging of the presser claw.   The said guide rail is arrange | positioned so that the space | interval with the said travel rail may become narrow gradually in the area | region which starts the engagement with the said conveyor chain and the said trolley | bogie. The chain conveyor device described.   The chain conveyor apparatus according to any one of claims 1 to 3, wherein the carriage has an engagement claw stopper that regulates a lower limit of swing of the engagement claw.   The chain conveyor apparatus according to any one of claims 1 to 4, wherein the driving means is a servo motor.   6. The chain conveyor apparatus according to claim 1, wherein the conveyor chain is a needle bush chain.

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