JP2010285264A - Device and method for carrying in and carrying out treated object to surface treatment area - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for carrying in and out a treated object to a surface treatment area for improving productivity capable of making the carry-in and carry-out operation of the treated object to the surface treatment area flexible, and capable of reducing cost. <P>SOLUTION: The device includes: a plurality of carriers 1 movable along a guide rail and supporting the treated object W; an ordinary speed towing drive means 11 for installing a first engaging dog engaged with a towing object member of the carriers 1; a high speed towing drive means 12 for installing a second engaging dog engaged with the towing object member and higher in a towing speed than the ordinary speed towing drive means 11; a rotational drive means 10 arranged at the right-left one side of the surface treatment area C and rotating a divided rail of dividing a part of the guide rail in the counterclockwise direction when viewed from the right side in the carrying direction; a first engagement releasing means for releasing the engagement of the towing object member and the first engaging dog; and a second engagement releasing means for releasing the engagement of the towing object member and the second engaging dog. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an apparatus and a method for loading and unloading an object to be processed in order to perform a surface treatment such as an electrolytic coating process on the object to be processed.

For example, in the transport direction as a device for carrying in and carrying out the body to be processed with respect to the surface treatment area such as the treatment tank for performing the surface treatment used for the electrolytic coating treatment of the vehicle body in the automobile production factory or the pretreatment thereof. A plurality of carriers with vehicle bodies mounted on parallel processing tanks are transported all at once along the traveling rail by an intermittent feed device, and rotated in a stopped state where a part of the traveling rail is positioned on a divided rail. There is one that is immersed in a treatment liquid in a treatment tank by being rotated together with a divided rail by a driving device (see, for example, Patent Document 1).
Further, a plurality of mounting frames to which the vehicle body is mounted are moved along a guide rail in a predetermined moving direction by driving means such as a driving chain, and the mounting frame is rotated around a horizontal rotation axis orthogonal to the predetermined moving direction. A mounting plate on which a vehicle body is mounted by means of a self-propelled transfer vehicle (carriage) that translates along a traveling surface (guide device, guide way), comprising a cam rail and a cam lever (for example, see Patent Document 2) (Inner frame, mount) is supported so as to be rotatable around a horizontal rotation axis (rotation shaft) orthogonal to the translational movement direction, and an electric motor (rotation drive, rotating the rotation axis on the self-propelled transfer vehicle) There are also devices (for example, see Patent Documents 3 to 5) to which an electric drive device is attached.

US Pat. No. 5,110,440 (FIG. 2) JP-T-2001-501532 (Fig. 1-5) Japanese Patent Laid-Open No. 2008-100300 (FIG. 1-5) JP-T-2005-517616 (FIGS. 5 and 12-13) JP-T 2007-537959 (FIG. 3b)

The apparatus of Patent Document 1 conveys a plurality of carriers all at once along a traveling rail by an intermittent feeding device, and rotates the carriers together with the divided rails by a rotary driving device in a state where the carriers are stopped all at once. Therefore, since the vehicle body is intermittently fed, it is difficult to reduce the tact time, and the productivity cannot be improved.
Further, the device of Patent Document 2 conveys a plurality of mounting frames all at once along a traveling rail by driving means such as a driving chain, and moves a cam lever fixed to the mounting frame while moving the mounting frame. Since the vehicle body is carried in and out of the surface treatment area by rotating the mounting frame based on the movement in the translation direction, the rotation speed is determined by the movement speed in the translation direction. Therefore, it is not possible to flexibly carry in and carry out the vehicle body with respect to the surface treatment region.
Furthermore, the devices of Patent Documents 3 to 5 require that each of the self-propelled transfer vehicles (carriages) be provided with a driving device, supply power to the self-propelled transfer vehicles, and the self-propelled transfer vehicles and the ground side. This increases the cost.

  Accordingly, in view of the above-described situation, the present invention intends to solve the problem that the tact time can be shortened and the productivity can be improved, and the loading and unloading operations of the workpiece to and from the surface treatment region are performed relatively flexibly. The object is to provide an apparatus and a method for loading and unloading an object to and from a surface treatment region capable of suppressing an increase in cost.

  In order to solve the above problems, an apparatus for loading and unloading an object to and from a surface treatment area according to the present invention is movable along guide rails laid on the upper left and right sides of the surface treatment area. In addition, a plurality of carriers that support an object to be processed and a first engagement dog that is engaged with a towed member of the carrier are attached, and usually extend along a conveyance path on one or both sides of the surface treatment region. From the normal speed traction drive means, which is attached along the conveyance path on the left or right side or both sides of the surface treatment region, to which a fast traction drive means and a second engagement dog that engages the towed member of the carrier are attached. In addition, a high-speed traction drive means having a high traction speed and a split rail that is provided on one of the left and right sides or both sides of the surface treatment region and that divides a part of the guide rail are viewed from the right side in the conveyance direction. Rotation drive means for rotating in a metering direction, first engagement release means for releasing engagement of the towed member and the first engagement dog, and engagement of the towed member and the second engagement dog. And a second disengagement means for releasing.

  Here, the carrier has a traveling frame extending in the front-rear direction fixed to one end of a horizontal rotation shaft extending in the left-right direction to which a support member for supporting the object to be processed is attached, and the left and right sides of the traveling frame are The front and rear traveling wheels which are engaged with one of the guide rails are attached, and the traveling wheel is attached to the other end of the horizontal rotating shaft, and the rotational driving means is arranged on the left and right sides of the surface treatment region. It is preferable to install only on the traveling frame side.

  The carrier fixes a first traveling frame extending in the front-rear direction to one end of a horizontal rotating shaft extending in the left-right direction to which a support member for supporting the object to be processed is attached, and the other end of the horizontal rotating shaft A second traveling frame extending in the front-rear direction is attached to be rotatable about a left-right axis, and front and rear traveling wheels that engage with the left and right guide rails are attached to the front and rear of the first traveling frame and the second traveling frame, respectively. It is preferable that the rotation driving means is installed only on the first traveling frame side on the left and right sides of the surface treatment region.

  Further, the storage object has the object to be processed above the carrier, and extends in the front-rear direction by being offset above the rotation center of the rotation driving means in a state where the carrier is moving along the guide rail. It is preferable that a bumper frame for determining the pitch is attached to the carrier, and the length of the traveling frame in the front-rear direction is made shorter than the bumper frame.

  In order to solve the above problems, the method for carrying in and carrying out the object to / from the surface treatment area according to the present invention is a work object that is movable along guide rails laid on the upper left and right sides of the surface treatment area. A plurality of carriers that support the carrier by towing the normal speed traction drive means, and the traction drive of the carrier in front of the surface treatment region has a higher traction speed than the normal speed traction drive means. A step of switching to traction by means and transporting faster than the upstream adjacent carrier, and releasing the traction by the high-speed traction drive means with respect to the fast-forwarded carrier and guiding the carrier on one side or both sides of the surface treatment region A step of positioning a part of the rail on the divided rail, and the divisional rail as viewed from the right side in the conveying direction by the rotation driving means. The object to be processed supported by the carrier by rotating clockwise is carried into the surface treatment region, and further, the divided rail is rotated counterclockwise by the rotation driving means, and the object to be treated is subjected to the surface treatment. A step of unloading the carrier, a step of releasing the positioning of the carrier and the divided rail, towing by the high-speed traction drive means and transporting faster than the upstream adjacent carrier, and towing the carrier at the high-speed traction And a step of switching from the driving means to the traction by the normal speed traction driving means.

  Further, in order to solve the above problems, a method for carrying in and carrying out an object to / from a surface treatment area according to the present invention is a movable object along guide rails laid on the upper left and right sides of the surface treatment area. A step of transporting a plurality of carriers supporting a processed object by pulling with a normal speed traction drive means, and a traction speed of the carrier before reaching the surface treatment region is higher than that of the normal speed traction drive means. A step of switching to traction by the traction drive means and transporting faster than the upstream adjacent carrier, and releasing the traction by the high-speed traction drive means with respect to the fast-forwarded carrier, and the carrier is moved to the left or right side of the surface treatment region or A part of the guide rails on both sides is divided, and positioned on the upstream divided rail located upstream of the surface treatment region; and An object to be treated which is supported by the carrier by rotating the upstream divided rail 180 degrees counterclockwise when viewed from the right in the transport direction by upstream rotation driving means located upstream of the surface treatment area. , The positioning of the carrier and the upstream split rail is released, the vehicle is pulled and transported by the normal speed traction drive means, and the traction by the normal speed traction drive means is released. A step of positioning the carrier on a downstream divided rail located downstream of the surface treatment region obtained by dividing a part of the guide rail on one of the left and right sides or both sides of the surface treatment region; The downstream split rail is rotated 180 degrees counterclockwise by the downstream rotational drive means located on the downstream side, and the carrier The step of unloading the supported workpiece from the surface treatment region, the positioning of the carrier and the downstream split rail being canceled, and the high speed traction drive means having a traction speed higher than the normal speed traction drive means A step of towing and transporting faster than the upstream adjacent carrier, and a step of switching the carrier towing from the high speed traction drive means to the traction by the normal speed traction drive means.

  Here, the upstream rotating drive means rotates the object to be processed 180 degrees counterclockwise, carries the object into the surface treatment area, and supports the object positioned in the surface treatment area. After releasing the positioning with the upstream split rail and before towing the carrier with the normal speed traction drive means, the intermediate speed between the traction speed of the normal speed traction drive means and the traction speed of the high speed traction drive means. A step of towing the carrier by a medium-speed traction drive means at a traction speed; and after switching the traction by the medium-speed traction drive means to traction by the normal speed traction drive means and transporting the carrier, to the downstream split rail Before positioning the carrier, the carrier is transported by switching from traction by the normal speed traction drive means to traction by the medium speed traction drive means. Preferably formed by a step that.

According to the apparatus for carrying in and out the surface treatment area from the surface treatment area according to the present invention, the guide rail laid on the upper left and right of the surface treatment area, and the object to be treated that is movable along the guide rail Normal-speed traction drive means extending along the conveyance path on one of the left and right sides or both sides of the surface treatment region, to which a first engagement dog that engages a to-be-towed member of the carrier is attached. The traction speed is higher than that of the normal speed traction drive means, which is attached along the conveyance path on one side or both sides of the surface treatment region, to which a second engagement dog that engages a towed member of the carrier is attached. A high-speed traction drive means and a split rail, which is a part of the guide rail, installed on the left and right sides or both sides of the surface treatment area, are rotated counterclockwise when viewed from the right side in the transport direction. Rotation drive means, first engagement release means for releasing engagement of the towed member and the first engagement dog, and second release of engagement of the towed member and the second engagement dog. Since the disengagement means is provided, the carrier is normally transported by traction by the normal speed traction drive means, and when the workpiece is carried into the surface treatment region, the first disengagement means is used at the preceding stage. It is possible to release the traction of the carrier by the normal speed traction drive means and to pull the carrier by the high speed traction drive means and to carry it forward.
By this fast-forwarding conveyance, it is possible to make a gap between the carrier that has been fast-forwarded conveyance and the upstream adjacent carrier, so in this state, the second engagement disengaging means releases the traction of the carrier by the high-speed traction driving means, An object to be processed supported on the carrier while avoiding interference with the upstream adjacent carrier by positioning the carrier on the divided rail and rotating the divided rail counterclockwise as viewed from the right in the conveying direction by the rotation driving means. Can be carried into the surface treatment region.
In addition, after carrying the workpiece into the surface treatment region, the division rail can be rotated counterclockwise by the rotation driving means so as to avoid interference with the downstream adjacent carrier moving downstream. Therefore, the object to be processed supported by the carrier can be carried out from the surface treatment region while avoiding interference with the downstream adjacent carrier.

Therefore, normal conveyance by the normal speed traction drive means, high-speed conveyance by the high-speed traction drive means installed at the required location, and the carrier in the stopped state by the rotation drive means installed at the required location in the counterclockwise direction when viewed from the right in the conveyance direction. By combining with rotation, the conveyance of the carrier is stopped in order to carry the workpiece into and out of the surface treatment region without interfering with the carrier continuously conveyed by the normal speed traction drive means. Since it is not necessary to rotate the carrier while intermittently feeding it, the tact time can be shortened and the productivity can be improved as compared with the configuration of Patent Document 1.
In addition, the rotational speed of the rotational drive means is not determined by the pulling speed (moving speed) of the normal speed traction drive means that performs normal carrier transportation or the high speed transportation means that performs high speed transportation. Compared to a simple configuration, the workpiece can be carried into and out of the surface treatment region flexibly.
Furthermore, the carrier is transported by the normal speed traction drive means and the high speed traction drive means outside the carrier, and the carrier is rotated by the external rotation drive means. Since it is not necessary to provide power supply to the carrier and to perform communication between the carrier and the ground side, the cost can be reduced as compared with the configurations of Patent Documents 3 to 5.
In addition, the carrier is rotated counterclockwise when viewed from the right side in the conveyance direction, and the workpiece is carried in and out of the surface treatment region. For example, the surface treatment region is a treatment tank in which treatment liquid is stored. In some cases, the flow of the processing liquid in the same direction as the processing object traveling in the transport direction in the processing liquid is created, and the resistance of the processing liquid to the processing object can be reduced, so that the resistance of the processing liquid is reduced. The damage of the to-be-processed object based can be suppressed.

In addition, the carrier fixes a traveling frame extending in the front-rear direction to one end of a horizontal rotating shaft extending in the left-right direction to which a support member for supporting the object to be processed is attached, It is a three-wheel configuration in which front and rear traveling wheels that are engaged with one of the guide rails are attached, and a traveling wheel is attached to the other end of the horizontal rotation shaft, and the rotation driving means is arranged on the left and right sides of the surface treatment region. If it is installed only on the traveling frame side, in addition to the above-mentioned effects, the divided rail obtained by dividing a part of the guide rail on the traveling frame side is rotated by the rotation driving means installed only on the traveling frame side, so that the divided rail is obtained. The positioned carrier and the object to be processed can be rotated and carried into and out of the surface treatment region.
Therefore, since the split rail, the rail lock device that fixes the split rail and the guide rail, and the rotational drive means that rotates the split rail need only be installed on the left and right sides of the surface treatment area, Compared with the configuration installed on both sides, the installation cost of the rotational drive means and the like can be reduced to about ½.
In addition, since the non-self-propelled carrier conveyed along the guide rails laid on the upper left and right of the surface treatment area has a simple configuration of three wheels, the cost of the carrier can be reduced and the reliability can be reduced. Can be improved.

Further, the carrier fixes a first traveling frame extending in the front-rear direction to one end of a horizontal rotation shaft extending in the left-right direction to which a support member for supporting the object to be processed is attached, and the other end of the horizontal rotation shaft A second traveling frame extending in the front-rear direction is attached to be rotatable about a left-right axis, and front and rear traveling wheels that engage with the left and right guide rails are attached to the front and rear of the first traveling frame and the second traveling frame, respectively. If the rotational driving means is installed only on the first traveling frame side on the left and right sides of the surface treatment area, in addition to the above-described effects, the second traveling frame has a horizontal rotation axis. Since it is mounted so as to be rotatable around the left-right axis, a split rail that is part of the guide rail on the first traveling frame side is installed only on the first traveling frame side. By rotating the rotational drive means, it can be carried in and out relative to rotate the surface treatment area of the carrier and the workpiece which has been positioned in the divided rail.
Therefore, since the split rail, the rail lock device that fixes the split rail and the guide rail, and the rotational drive means that rotates the split rail need only be installed on the left and right sides of the surface treatment area, Compared with the configuration installed on both sides, the installation cost of the rotational drive means and the like can be reduced to about ½.
In addition, since the non-self-propelled carrier conveyed along the guide rails laid on the upper left and right of the surface treatment area has a simple configuration of four wheels, the cost of the carrier can be reduced and the reliability can be reduced. Can be improved.

Furthermore, the object to be processed is on the upper side of the carrier, and the carrier moves along the guide rail, and is offset upward from the rotation center of the rotation driving means and extends in the front-rear direction. When a bumper frame for determining a storage pitch is attached to the carrier, and the length of the traveling frame in the front-rear direction is shorter than the bumper frame, in addition to the effect, the carrier is carried into the surface treatment region. In a state where the carrier is rotated counterclockwise when viewed from the right side in the conveyance direction, the bumper frame is located below the rotation center (horizontal rotation axis) of the rotation driving means. For example, one of the adjacent carriers is to be processed. Is in the normal transfer state with the workpiece positioned on the upper side, and the other is in the state of loading into the surface treatment area with the workpiece to be positioned on the lower side. It can reduce the distance between the carrier than the storage pitch during normal transport.
Accordingly, the length in the front-rear direction of the surface treatment region such as the treatment tank can be reduced, so that space saving and cost reduction can be achieved.

According to the method for loading and unloading a workpiece to and from the surface treatment region according to the present invention, a plurality of workpieces that are movable along guide rails laid on the upper left and right of the surface treatment region and that support the workpiece. The step of towing and transporting the carrier by the normal speed traction drive means and the traction of the carrier in front of the surface treatment area are switched to the traction by the high speed traction drive means having a higher traction speed than the normal speed traction drive means. A step of fast-forwarding and transporting from the upstream adjacent carrier, and releasing the traction by the high-speed traction drive means with respect to the fast-forwarded carrier, and removing the carrier on a part of the guide rail on one side or both sides of the surface treatment region. Positioning on the divided rails and rotation of the divided rails counterclockwise when viewed from the right in the conveying direction by the rotation drive means Then, the object to be processed supported by the carrier is carried into the surface treatment area, and the divided rail is rotated counterclockwise by the rotation driving means to carry out the object to be treated from the surface treatment area. A step of releasing the positioning of the carrier and the divided rail, towing by the high-speed traction drive means and transporting faster than the upstream adjacent carrier, and towing the carrier from the high-speed traction drive means A step of switching to traction by the normal speed traction drive means, so that the carrier that has been normally conveyed is fast-forwarded before reaching the surface treatment region, and by this rapid-feed conveyance, the carrier is adjacent to the upstream side. Since it can be spaced from the carrier, the carrier is stopped in this state and positioned on the split rail. In addition, by rotating the split rail 360 degrees counterclockwise when viewed from the right in the transport direction by the rotation driving means, the workpiece supported by the carrier can be carried into and out of the surface treatment region, Thereafter, the carrier can be returned to normal conveyance after fast-forwarding.
Therefore, there exists an effect similar to the apparatus which carries in and carries out a to-be-processed object with respect to the above-mentioned surface treatment area | region.

Moreover, according to the method of carrying in and carrying out the workpiece to and from the surface treatment area according to the present invention, the workpiece to be treated is supported, which is movable along the guide rails laid on the upper left and right of the surface treatment area. A step of towing a plurality of carriers by a normal speed traction driving means and a traction by a high speed traction driving means having a traction speed higher than that of the normal speed traction driving means. To fast-forward and transport from the upstream adjacent carrier and release the traction by the high-speed traction drive means for the fast-forwarded carrier, and the carrier is moved to the left or right guide rail on the left or right side of the surface treatment region. Positioning on an upstream split rail located on the upstream side of the surface treatment region, partly divided, and above the surface treatment region A step of rotating the upstream divided rail by 180 degrees counterclockwise when viewed from the right side in the conveying direction by an upstream rotational driving means positioned on the side, and carrying the workpiece supported by the carrier into the surface treatment region; Releasing the positioning of the carrier and the upstream split rail, and pulling and transporting the carrier by the normal speed traction drive means; releasing the traction by the normal speed traction drive means with respect to the carrier; Positioning the carrier on a downstream divided rail located on the downstream side of the surface treatment region obtained by dividing a part of the guide rail on the left or right side or both sides of the treatment region, and located on the downstream side of the surface treatment region The downstream divided rail is rotated 180 degrees counterclockwise by the downstream rotational driving means, and the process supported by the carrier is performed. A step of unloading the object from the surface treatment region, positioning of the carrier and the downstream divided rail is canceled, and the upstream side is pulled by a high-speed traction drive unit having a higher traction speed than the normal-speed traction drive unit. A step of transporting faster than an adjacent carrier, and a step of transporting the carrier by switching the traction of the carrier from the high speed traction drive means to the traction by the normal speed traction drive means. It is fast-forwarded before reaching the processing area, and by this fast-forwarding conveyance, the carrier and the upstream adjacent carrier can be spaced apart, so in this state the carrier is stopped and positioned on the upstream split rail, The upstream divided rail is rotated 180 degrees counterclockwise as viewed from the right side in the transport direction by the upstream rotational driving means. Thus, the workpiece supported by the carrier can be carried into the surface treatment region, and the carrier can be conveyed at a normal speed in this state, and the carrier is stopped downstream of the surface treatment region. Positioning the downstream split rail, and rotating the downstream split rail 180 degrees counterclockwise when viewed from the right in the transport direction by the downstream rotational drive means, so that the workpiece supported by the carrier is surface-treated. Can be carried out, and after the subsequent carrier is fast-forwarded, it can be returned to normal conveyance.
Therefore, the same effect as the apparatus for carrying in and out the object to be processed is obtained with respect to the surface treatment area described above, and the length of the surface treatment area in the front-rear direction is long (for example, the object to be treated is immersed in the treatment liquid). It can also be applied to a configuration in which the time that needs to be kept is long).

  Further, the upstream rotating drive means rotates the workpiece to be rotated 180 degrees counterclockwise, carries the workpiece into the surface treatment region, and supports the carrier positioned in the surface treatment region and the carrier. After releasing the positioning with the upstream divided rail and before towing the carrier by the normal speed traction drive means, the traction between the traction speed of the normal speed traction drive means and the traction speed of the high speed traction drive means A step of towing the carrier by the medium-speed traction drive means at a speed, and after switching the traction by the medium-speed traction drive means to the traction by the normal speed traction drive means and transporting the carrier, Before positioning the carrier, the traction by the normal speed traction drive means is switched to the traction by the medium speed traction drive means to convey the carrier. In addition to the above-described effect, the step of pulling the carrier supporting the workpiece positioned in the surface treatment region by the medium-speed traction drive means is provided in the step. The carrier supporting the object to be processed located in the processing area can be fed faster than the normal speed traction drive means by traction by the medium speed traction drive means. Therefore, when the tact time is shortened, the normal speed traction is achieved. The case where it cannot catch up with the engagement dog of a drive means, or the case where an upstream adjacent carrier collides with the said carrier can be eliminated.

It is a schematic plan view which shows the apparatus which carries in and carries out a to-be-processed object with respect to the surface treatment area | region which concerns on embodiment of this invention, and has shown the structure provided with one rotation drive means in a surface treatment area | region. Similarly, it is a schematic plan view, and shows a configuration including a rotation driving means on the upstream side and the downstream side of the surface treatment region that is long in the front-rear direction. It is a front view which shows the rotation drive means circumference. Similarly, it is a plan view and shows a case where the carrier has a three-wheel configuration. It is the partial longitudinal cross-sectional view similarly seen from back. It is an enlarged front view which shows a 1st engagement dog and a 1st engagement cancellation | release means. It is an enlarged front view which shows a 2nd engagement dog and a 2nd engagement cancellation | release means, and has shown the engagement state. Similarly, it is an enlarged front view and shows a disengaged state. It is the principal part enlarged view seen from back which shows a normal-speed traction drive means and a high-speed traction drive means, and has shown the state which is pulling the carrier by the high-speed traction drive means. It is a top view which shows the rotation drive means circumference, and has shown the case where a carrier is a 4 wheel structure. It is a schematic front view which shows operation | movement in a surface treatment area | region, (a) is the state which positioned the said carrier pulled by the high-speed traction drive means to the division rail (rotation drive means), (b) is the said carrier by rotation drive means. (C) shows a state in which the carrier is rotated 90 degrees counterclockwise as viewed from the right in the transport direction by the rotation driving means. FIG. 6 is also a schematic front view, in which (a) shows a state where the carrier is rotated 180 degrees counterclockwise by the rotation driving means, and (b) shows a rotation of the carrier 270 degrees counterclockwise by the rotation driving means. (C) shows a state in which the carrier is rotated 360 degrees counterclockwise by the rotation driving means. It is a schematic front view which shows the operation | movement in another surface treatment area | region, (a) is the state which has pulled the said carrier by the high-speed traction drive means, (b) is the upstream division rail (upstream rotation drive) of the said carrier. (C) is a state where the carrier is rotated 90 degrees counterclockwise by the upstream side rotation driving means, and (d) is a state where the carrier is rotated by the upstream side rotation driving means. The carrier is shown rotated 180 degrees counterclockwise. FIG. 5A is also a schematic front view, in which (a) positions and rotates the carrier that has been pulled by the normal speed traction drive means after rotating 180 degrees counterclockwise on the downstream divided rail (downstream rotation drive means). (B) shows a state in which the carrier is rotated 90 degrees counterclockwise by the downstream side rotation driving means, and (c) shows a state in which the carrier is turned counterclockwise by the downstream side rotation driving means. (D) shows the moment when the carrier is pulled by the high-speed traction drive means.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste.
In FIG. 1 and FIG. 2, description of guide rails and the like is omitted, and in FIG. 2, only the carriers at the positions of the upstream and downstream rotational drive means are shown.
In the present specification, along the carrier transport direction (see arrow A in the figure), the front side (downstream side) is the front, the rear side (upstream side) is the rear, and the left and right are forwards. The view from the right is the front view.

  As shown in FIGS. 1-5, the apparatus which carries in and carries out a to-be-processed object with respect to the surface treatment area | region which concerns on embodiment of this invention has several carrier 1,1, ... supporting the to-be-processed object W. Is transported from the upstream side to the downstream side of the transport path (see arrow A in the figure), and the workpiece W is carried into the surface treatment region C and unloaded from the surface treatment region C. The carriers 1, 1,... Are pulled by a chain conveyor 11 as normal speed traction drive means and high speed chain feeders 12, 12A, 12B as high speed traction drive means, which will be described later, and are laid on the upper part (upper side) of the surface treatment region C. It moves along the right and left guide rails GR1, GR2 made of, for example, H-shaped steel.

4 and 5, the carrier 1 has a traveling frame 3 extending in the front-rear direction at the right end of the horizontal rotation shaft 2 extending in the left-right direction to which the support member 4 for supporting the workpiece W is attached. Is fixed, front and rear traveling wheels 5A and 5B that engage with the right guide rail GR1 are attached to the front and rear of the traveling frame 3, and the traveling wheel 6 is attached to the left end of the horizontal rotary shaft 2 (the traveling wheel is The structure is provided with three wheels) and is positioned in the left-right direction by side rollers 20 and 20 (see FIG. 5) attached to the traveling frame 3.
Further, the carrier 1 has a bumper frame 9 for determining a storage pitch, with the workpiece W on the upper side of the support member 4 as shown in FIGS. 3 to 5, of the rotation driving means 10, 10 </ b> A, 10 </ b> B. The traveling frame 3 is attached so as to extend in the front-rear direction by being offset above the rotation center (horizontal rotation shaft 2), and the length in the front-rear direction of the traveling frame 3 is set to be shorter than the length in the front-rear direction of the bumper frame 9. .

As shown in FIGS. 3 to 5, a part of the right guide rail GR1 is divided into a divided rail SR, and the divided rail SR is supported so as to be rotatable around a left-right axis.
In a state in which the carrier 1 is positioned on the split rail SR by the carrier positioning mechanisms 13 and 14, a rail lock device (not shown) that fixes the split rail SR on the rotation side and the right guide rail GR1 on the fixed side is released to rotate. By the means 10, 10A, 10B (see also FIGS. 1 and 2), the workpiece W is rotated counterclockwise as viewed from the right (conveying direction right) as indicated by the arrow D in FIG. Therefore, the workpiece W can be carried in and out of the surface treatment region C.

As shown in FIGS. 4 and 5, the carrier positioning mechanism 13 drives the positioning pin 15 (see FIG. 5) by the air cylinder 13 </ b> A and inserts the positioning pin 15 into the hole formed in the traveling frame 3 of the carrier 1. The carrier positioning mechanism 14 drives the arms 16A and 16B (see FIG. 4) by the air cylinder 14A and sandwiches the traveling wheel 6 by the arms 16A and 16B. Such positioning rotates the carrier 1. This is done to hold the axis of rotation.
As shown in FIGS. 3 to 5, the rotation drive means 10, 10 </ b> A, 10 </ b> B includes a pin gear sprocket 18 fixed to the output shaft of a rotation drive device 17 constituted by, for example, an electric motor and a speed reducer, as split rails SR. The divided gear SR is driven in a counterclockwise direction when viewed from the right by the driving torque of the rotary driving device 17.

Next, the chain conveyor 11 which is a normal speed traction drive means and the high speed chain feeders 12, 12A and 12B which are high speed traction drive means will be described.
As shown in FIGS. 1 and 2, the chain conveyor 11 and the high-speed chain feeders 12, 12 </ b> A, 12 </ b> B extend along the conveyance path on the right side (or the left side) of the surface treatment region C, and the chain conveyor 11 is installed over substantially the entire length of the transport path, and the high-speed chain feeders 12, 12A, 12B are installed only at locations where fast-feed transport is required.
Note that the chain conveyor 11 that is the normal speed traction drive means and the high-speed chain feeders 12, 12A, and 12B that are the high-speed traction drive means may be installed on the left and right sides instead of the left and right sides.

As shown in FIGS. 5, 6, and 9, first engagement dogs 21 </ b> A and 21 </ b> B that engage with the towed member 8 of the carrier 1 are attached to the chain conveyor 11, and the first disengaging means The rollers 23 and 24 of the first engagement dogs 21A and 21B are pushed up by the cam rail 31 and the first engagement dogs 21A and 21B are swung around the swing shafts 25 and 26, whereby the towed member 8 and the first The engagement with the 1 engagement dogs 21A and 21B is released.
Further, in a place where the cam rail 31 is not provided, the first engagement dogs 21A and 21B attached to the chain conveyor 11 at an equal pitch engage with the pulled member 8, so that the carrier 1 is moved at a normal conveyance speed by the chain conveyor 11. Towed by.

As shown in FIGS. 5 and 7 to 9, the high-speed chain feeders 12, 12 </ b> A, and 12 </ b> B are attached with second engagement dogs 22 </ b> A and 22 </ b> B that engage with the pulled member 8 of the carrier 1. The second engagement release means for releasing the engagement between the pulling member 8 and the second engagement dogs 22A and 22B is constituted by a divided lift rail 33 and an air cylinder 34 that drives the lift.
That is, by lowering the divided elevating rail 33 by the air cylinder 34 (see FIG. 8), the rollers 27 and 28 are in contact with the upper surface of the divided elevating rail 33 and the second engagement dogs 22A and 22B are moved to the swing shaft 29. , 30 swings around, so that the engagement of the first engagement dogs 21A, 21B with the pulled member 8 of the carrier 1 is released.
Further, in a state where the divided lifting rail 33 is raised by the air cylinder 34 (see FIG. 7), the rollers 27 and 28 are pushed up by the divided lifting rail 33 and the second engagement dogs 22A and 22B are pulled by the carrier 1. In order to engage with the member 8, the carrier 1 is pulled at a higher pulling speed than the chain conveyor 11 by the high-speed chain feeders 12, 12A, 12B.

Here, the carrier 1 may have a four-wheel configuration (a configuration including four traveling wheels) as shown in FIG. 10 instead of the three-wheel configuration as shown in FIG.
That is, in the carrier 1 of FIG. 10, the first traveling frame 3A extending in the front-rear direction is fixed to the right end of the horizontal rotation shaft 2 extending in the left-right direction to which the support member 4 for supporting the workpiece W is attached. A second traveling frame 3A extending in the front-rear direction is attached to the left end of the rotating shaft 2 so as to be rotatable about a left-right axis by a bearing 7, and before and after engaging with the right guide rail GR1 before and after the first traveling frame 3A. Traveling wheels 5A and 5B are attached, and front and rear traveling wheels 6A and 6B that engage with the left guide rail GR2 are attached before and after the second traveling frame 3B.
The bumper frame 9 similar to the configuration of FIG. 4 is also attached to the carrier 1 of FIG. 10, and the length of the traveling frames 3A, 3B in the front-rear direction is set shorter than the length of the bumper frame 9 in the front-rear direction. Is done.
Although not shown in FIG. 10, the carrier 1 having such a four-wheel configuration is positioned to hold the rotation axis when the carrier 1 is rotated. For example, the first traveling frame 3A And the carrier positioning mechanism of the structure which inserts a positioning pin in the hole each formed in the 2nd traveling frame 3B is used.

Next, an operation for carrying the workpiece W into the surface treatment region C, an operation for carrying the workpiece W out of the surface treatment region C, and the like will be described.
First, the case where the length of the surface treatment region C (treatment tank B1) in the front-rear direction is relatively short will be described with reference to FIGS.

FIG. 11 (a) shows that the traction of the carrier 1B (referred to as “the carrier”) that has been pulled by the chain conveyor 11 that is a normal speed traction drive means is high-speed traction before reaching the processing tank B1 shown in FIG. Switching to the high-speed chain feeder 12 that is the driving means, and transporting faster than the upstream adjacent carrier 1C, the traction by the high-speed chain feeder 12 is released by the second engagement release means 32 (see FIGS. 7 and 8), The carrier 1B is positioned on the split rail SR (see FIGS. 3 to 5), and the fixed state between the split rail SR and the right guide rail GR1 (see FIGS. 3 to 5) by the rail lock device is released. Yes.
In this state, as shown in FIG. 11 (c), FIG. 12 (a), FIG. 12 (b) and FIG. 12 (c), the rotation drive means 10 shown in FIG. By rotating the rail SR 360 degrees counterclockwise when viewed from the right side in the transport direction, the workpiece W supported by the carrier 1B is immersed in the processing liquid in the processing tank B1 and further taken out from the processing liquid.

  Then, in the state shown in FIG. 12 (c), the split rail SR and the right guide rail GR1 are fixed by the rail lock device, the positioning of the carrier 1B to the split rail SR is released, and the carrier 1B is moved to the high-speed chain feeder. 12, the distance between the carrier 1 </ b> A and the downstream adjacent carrier 1 </ b> A is narrowed, and then the carrier 1 </ b> B is pulled by the chain conveyor 11 by switching the traction of the carrier 1 </ b> B from the high-speed chain feeder 12 to the chain conveyor 11. Transported at normal speed.

Next, the case where the length of the surface treatment region C (treatment tank B2) in the front-rear direction is relatively long will be described with reference to FIGS.
FIG. 13 (a) shows the upstream side of the carrier 1B (referred to as “the carrier”) that has been pulled by the chain conveyor 11, which is the normal speed traction drive means, before reaching the processing tank B2 shown in FIG. A state is shown in which it is switched to the upstream high-speed chain feeder 12A, which is a high-speed traction drive means, and is transported faster than the upstream adjacent carrier 1C.
In FIG. 13B, the second engagement release means 32 (see FIGS. 7 and 8) releases the traction by the upstream high-speed chain feeder 12A, and the carrier 1B is separated from the upstream split rail SR (FIG. 3). FIG. 5 to FIG. 5) shows a state in which the fixing between the upstream divided rail SR and the right guide rail GR1 (see FIGS. 3 to 5) by the rail lock device is released.

In this state, as shown in FIGS. 13 (c) and 13 (d), the upstream side rotation rail means 10A shown in FIG. By rotating, the workpiece W supported by the carrier 1B is immersed in the processing liquid in the processing tank B1, and in this immersion state, the positioning of the carrier 1B and the upstream split rail SR is released. The upstream split rail SR and the right guide rail GR1 are fixed by the rail lock device, the positioning of the carrier 1B on the upstream split rail SR is released, and the carrier 1B is pulled by the chain conveyor 11 at a normal speed. Transport.
In FIG. 14A, the carrier 1B that has been pulled by the chain conveyor 11 in the state of FIG. 13D is positioned on the downstream divided rail SR (see FIGS. 3 to 5), and downstream by the rail lock device. The state where the side split rail SR and the right guide rail GR1 (see FIGS. 3 to 5) are released from the fixed state is shown, as shown in FIGS. 14 (b) and 4 (c). By rotating the downstream divided rail SR 180 degrees counterclockwise when viewed from the right side in the transport direction by the downstream side rotation driving means 10B, the workpiece W supported by the carrier 1B becomes the processing liquid in the processing tank B1. Taken from.

  Then, as shown in FIG. 14D, the downstream split rail SR and the right guide rail GR1 are fixed by the rail lock device, the positioning of the carrier 1B on the downstream split rail SR is released, and the state in this state The carrier 1B is pulled by the downstream high-speed chain feeder 12B, which is the downstream high-speed traction drive means shown in FIG. 2, to narrow the distance from the downstream adjacent carrier 1A, and then the carrier 1B is pulled by the downstream high-speed chain feeder 12B. By switching from traction to chain conveyor 11, the carrier 1 </ b> B is conveyed at a normal speed while being pulled by the chain conveyor 11.

  When the length of the surface treatment region C (treatment tank B2) in the front-rear direction is relatively long, the surface treatment region is obtained by rotating the workpiece W 180 degrees counterclockwise by the upstream side rotation driving means 10A. C is carried into C (treatment tank B2), and after the positioning of the carrier 1B supporting the workpiece W positioned in the surface treatment region C and the upstream divided rail SR is released, the carrier 1B is driven at normal speed traction. Before pulling by the chain conveyor 11 as the means, the intermediate speed pulling drive means (not shown) having an intermediate pulling speed between the pulling speed of the chain conveyor 11 and the high speed chain feeders 12A and 12B as the high speed pulling drive means. The carrier 1B is towed, and the carrier is switched from towing by the medium speed tow drive means to tow by the chain conveyor 11. A step of switching the traction by the chain conveyor 11 to the traction by the medium-speed traction drive means and conveying the carrier 1B after positioning B and before positioning the carrier 1B on the downstream divided rail SR. May be.

The medium speed traction drive means may be extended so that the high speed chain feeders 12A and 12B can be controlled at a variable speed without being separated from the high speed chain feeders 12A and 12B which are high speed traction drive means.
Here, the reason for using medium-speed towing instead of high-speed towing is to prevent damage to the workpiece W due to the resistance of the treatment liquid, and an appropriate speed higher than the normal towing speed can be selected. It is.
Thus, by providing the step of pulling the carrier 1B supporting the workpiece W positioned in the surface treatment region C by the medium-speed traction drive means, the processing target positioned in the surface treatment region C in the step is provided. Since the carrier 1B that supports the object W can be fed faster than the chain conveyor 11 that is the normal speed traction drive means by traction by the medium speed traction drive means, when the tact time is further shortened, The case where it cannot catch up with 1st engagement dog 21A, 21B, or the case where the upstream adjacent carrier 1C collides with the said carrier 1B can be eliminated.

As described above, the upstream rotation driving means 10A and the downstream rotation driving means 10B are installed, and the carrier 1 (the carrier 1B) in a state of being positioned on the upstream division rail SR and the downstream division rail SR is 180 degrees each. By the structure to rotate, it can apply also to the structure where the length of the front-back direction of the surface treatment area | region C is long (for example, the time which needs to immerse a to-be-processed object in a process liquid is long).
In addition, as described above for the carrier 1, the workpiece W is above the carrier 1, and the bumper frame 9 is moved along the guide rails GR1 and GR2 while the bumper frame 9 is rotated. 13A and 13B is offset above the rotation centers 10A and 10B (horizontal rotation shaft 2), and the length of the traveling frames 3, 3A and 3B in the front-rear direction is shorter than that of the bumper frame 9. As shown in FIG. 14B and FIG. 14D, in the state where the workpieces W, W of the adjacent carriers 1A, 1B and 1B, 1C are turned upside down, the storage pitch is larger than that during normal conveyance. The interval between carriers can be reduced.
Therefore, the length of the treatment tank B2 in the front-rear direction can be shortened to reduce the volume, and the cost of the treatment liquid can be reduced, so that the cost can be reduced.
In addition, since the length in the front-rear direction of the surface treatment region C such as the treatment tank B2 can be reduced, the conveyance line can be shortened, so that cost reduction and space saving can be achieved.

By the operation as described above, since the carrier 1B fast-forwarded and the upstream adjacent carrier 1C can be spaced apart by the above-described fast-forwarding, the carrier is divided by the rotational driving means 10 (upstream rotational driving means 10A). By rotating the rail (upstream division rail) SR counterclockwise, the workpiece W supported by the carrier 1B is treated with the treatment tank B1 (treatment tank B2) while avoiding interference with the upstream adjacent carrier 1C. ).
In addition, after the workpiece W is loaded into the processing tank B1 (processing tank B2), the rotation driving means 10 (downstream rotation driving means is arranged so as to avoid interference with the downstream adjacent carrier 1A moving downstream. 10B), the split rail (downstream split rail) SR can be rotated counterclockwise, so that the workpiece W supported by the carrier 1B is processed while avoiding interference with the downstream adjacent carrier 1A. It can be carried out from the tank B1 (processing tank B2).

  Therefore, normal conveyance by the chain conveyor 11 that is normal speed traction drive means, high-speed conveyance by the high-speed chain feeders 12, 12A, 12B that are high-speed traction drive means installed at required places, and rotation drive means 10 that are installed at the required places, By combining with the counterclockwise rotation when viewed from the right in the transport direction of the stopped carriers 1,... By 10A, 10B, interference with the carriers 1,. In order to carry the workpiece W into and out of the surface treatment region C without being transported, the carrier 1B can be rotated in a stopped state, so that it is necessary to rotate the carrier while intermittently feeding it. Therefore, the tact time can be shortened and productivity can be improved as compared with the configuration as in Patent Document 1.

In addition, the rotational speed of the rotation driving means 10, 10A, 10B is not determined by the pulling speed (moving speed) of the normal speed traction drive means that performs normal conveyance of the carrier or the high speed conveyance means that performs high speed conveyance. Compared with the configuration described in Document 2, the work W can be carried into and out of the surface treatment region C flexibly.
Further, the carriers 1,... Are transported by normal speed traction drive means and high speed traction drive means outside the carrier, and the carriers 1,... Are rotated by external rotation drive means 10, 10A, 10B. ,... Need not be provided with a traveling drive device and a rotation drive device for each, and it is not necessary to supply power to the carriers 1, and to communicate with the carrier, and the ground side. Cost can be reduced compared to the configuration.
Furthermore, the carrier 1,... Is rotated counterclockwise when viewed from the right side in the conveyance direction, and the workpiece W is carried into and out of the surface treatment region C. Therefore, for example, the surface treatment region C is treated with the treatment liquid. In the case of the processing tanks B1 and B2 in which the liquid is stored, the flow of the processing liquid in the same direction as the processing object W proceeding in the transport direction A in the processing liquid is created, and the resistance of the processing liquid to the processing object W is reduced. Since it can be made small, damage to the workpiece W based on the resistance of the processing liquid can be suppressed.

Further, the carrier 1,... Has a three-wheel configuration as shown in FIG. 4 or a four-wheel configuration as shown in FIG. 10, and a rail lock device for fixing the split rail SR, the split rail SR, and the guide rail GR1, and the split rail SR. Since the rotation driving means 10, 10A, 10B for rotating the vehicle are installed only on the traveling frame 3 on the left or right side of the surface treatment region C or the first traveling frame 3A side, the rotation driving means 10, 10A, 10B, etc. Compared with a configuration in which the processing area C is installed on both the left and right sides, the installation cost of the rotation driving means and the like can be reduced to about ½.
Further, in the configuration in which the rotation driving means 10, 10 </ b> A, 10 </ b> B are installed on the left and right sides of the surface treatment region C, the carriers 1,... Are twisted when the driving from both sides is not completely synchronized. Since an unnecessary load is applied to the load, it is necessary to supplement the strength of the carrier 1, itself with respect to such a load. However, the rotation driving means 10, 10A, and 10B are provided only on the left and right sides of the surface treatment region. Therefore, it is not necessary to perform reinforcement to cope with the unnecessary load.
Furthermore, since the non-self-propelled carriers 1,... Conveyed along the guide rails laid on the upper left and right of the surface treatment region C have a simple configuration of three wheels or four wheels, the carriers 1,. Costs can be reduced and reliability can be improved.

A Transport direction B1, B2 Treatment tank C Surface treatment region D Rotation direction GR1, GR2 Guide rail SR Split rail W Object 1, 1A, 1B, 1C, 1D Carrier 2 Horizontal rotation shaft 3 Traveling frame 3A First traveling frame 3B Second traveling frame 4 Support members 5A, 5B, 6, 6A, 6B Traveling wheel 7 Bearing 8 Pulled member 9 Bumper frame 10 Rotation drive means 10A Upstream rotation drive means 10B Downstream rotation drive means 11 Chain conveyor (normal speed traction) Driving means)
12 High-speed chain feeder (High-speed traction drive means)
12A upstream high-speed chain feeder (upstream high-speed traction drive means)
12B downstream high-speed chain feeder (downstream high-speed traction drive means)
13, 14 Carrier positioning mechanism 13A, 14A Air cylinder 15 Positioning pin 16A, 16B Arm 17 Rotation drive device 18 Pin gear sprocket 19 Pin gear 20 Side rollers 21A, 21B First engagement dogs 22A, 22B Second engagement dogs 23, 24 Rollers 25, 26 Oscillating shafts 27, 28 Rollers 29, 30 Oscillating shafts 31 Cam rail (first disengagement means)
32 Second disengagement means 33 Split lift rail 34 Air cylinder

Claims (7)

Guide rails laid on the upper left and right of the surface treatment area;
A plurality of carriers that are movable along the guide rails and that support the workpiece;
A normal speed traction drive means, which is attached with a first engagement dog to be engaged with a towed member of the carrier, and extends along a conveyance path on one or both sides of the surface treatment region;
A high-speed traction speed higher than that of the normal-speed traction drive means that extends along the conveyance path on one or both of the left and right sides of the surface treatment region, to which a second engagement dog that engages the to-be-towed member of the carrier is attached. Traction drive means;
Rotation drive means for rotating a divided rail obtained by dividing a part of the guide rail installed on the left or right side or both sides of the surface treatment region, counterclockwise when viewed from the right side in the conveying direction;
First engagement release means for releasing engagement of the towed member and the first engagement dog;
Second engagement release means for releasing engagement of the towed member and the second engagement dog;
The apparatus which carries in and carries out a to-be-processed object with respect to the surface treatment area | region characterized by providing.   The carrier fixes a traveling frame extending in the front-rear direction to one end of a horizontal rotation shaft extending in the left-right direction to which a support member for supporting the object to be processed is attached, and the left and right guide rails are disposed in front of and behind the traveling frame. And a traveling wheel attached to the other end of the horizontal rotation shaft, and the rotational driving means is connected to the traveling frame on the left and right sides of the surface treatment region. The apparatus which carries in and carries out to-be-processed object with respect to the surface treatment area | region of Claim 1 installed only in the side.   The carrier fixes a first traveling frame extending in the front-rear direction to one end of a horizontal rotating shaft extending in the left-right direction to which a support member for supporting the object to be processed is attached, and front and rear to the other end of the horizontal rotating shaft. A second traveling frame extending in the direction is attached so as to be rotatable about a left-right axis, and front and rear traveling wheels that engage with the left and right guide rails are respectively attached to the front and rear of the first traveling frame and the second traveling frame 4. 2. The workpiece is carried in and out of the surface treatment region according to claim 1, wherein the rotation driving means is installed only on the first traveling frame side on the left and right sides of the surface treatment region. apparatus.   A storage pitch that extends in the front-rear direction by being offset above the rotation center of the rotation driving means in a state where the object to be processed is above the carrier, and the carrier is moving along the guide rail. The surface treatment region according to any one of claims 1 to 3, wherein a bumper frame to be determined is attached to the carrier, and a length of the traveling frame in the front-rear direction is made shorter than the bumper frame. Equipment for loading and unloading processed materials. A step of pulling and conveying a plurality of carriers supporting a workpiece, which are movable along guide rails laid on the upper left and right of the surface treatment region, by a normal speed traction drive means;
Switching the traction of the carrier before reaching the surface treatment region to the traction by the high-speed traction drive means having a higher traction speed than the normal speed traction drive means, and transporting it at a higher speed than the upstream adjacent carrier;
Releasing the traction by the high-speed traction drive means with respect to the fast-forwarded carrier, and positioning the carrier on a divided rail obtained by dividing a part of the guide rail on one of the left and right sides or both sides of the surface treatment region;
The division rail is rotated counterclockwise when viewed from the right in the conveying direction by the rotation driving means, and the workpiece supported by the carrier is carried into the surface treatment area, and the division rail is further moved by the rotation driving means. Rotating the object to be treated from the surface treatment region by rotating it counterclockwise;
Releasing the positioning of the carrier and the split rail, towing by the high-speed traction drive means and transporting faster than the upstream adjacent carrier, and
Switching the traction of the carrier from the high speed traction drive means to the traction by the normal speed traction drive means,
A method for loading and unloading an object to be treated with respect to a surface treatment region. A step of pulling and conveying a plurality of carriers supporting a workpiece, which are movable along guide rails laid on the upper left and right of the surface treatment region, by a normal speed traction drive means;
Switching the traction of the carrier before reaching the surface treatment region to the traction by the high-speed traction drive means having a higher traction speed than the normal speed traction drive means, and transporting it at a higher speed than the upstream adjacent carrier;
Release the traction by the high-speed traction drive means with respect to the fast-forwarded carrier, and position the carrier on the upstream side of the surface treatment region obtained by dividing a part of the guide rail on the left or right side or both sides of the surface treatment region. Positioning to the upstream split rail,
An object to be processed supported by the carrier by rotating the upstream divided rail 180 degrees counterclockwise when viewed from the right side in the conveying direction by an upstream rotation driving means located upstream of the surface treatment region. Step into the area;
Releasing the positioning of the carrier and the upstream divided rail, and pulling and transporting by the normal speed traction drive means;
To the downstream split rail located on the downstream side of the surface treatment region, which is part of the guide rails on the left and right sides or both sides of the surface treatment region is released by releasing the traction of the carrier by the normal speed traction drive means Positioning the carrier;
A step of rotating the downstream divided rail by 180 degrees counterclockwise by a downstream rotational drive means located downstream of the surface treatment region and carrying out the object supported by the carrier from the surface treatment region. When,
Releasing the positioning of the carrier and the downstream divided rail, towing the high-speed traction drive means having a traction speed faster than the normal-speed traction drive means,
Switching the traction of the carrier from the high speed traction drive means to the traction by the normal speed traction drive means,
A method for loading and unloading an object to be treated with respect to a surface treatment region. The upstream rotating drive means rotates the workpiece to be rotated 180 degrees counterclockwise, carries the workpiece into the surface treatment region, and supports the carrier located in the surface treatment region and the upstream side. After releasing the positioning with the split rail, before pulling the carrier supporting the workpiece located in the surface treatment region by the normal speed traction drive means, the traction speed of the normal speed traction drive means Towing the carrier by medium-speed traction drive means having an intermediate traction speed between traction speeds of the high-speed traction drive means;
After transporting the carrier by switching from traction by the medium speed traction drive means to traction by the normal speed traction drive means, the traction by the normal speed traction drive means is performed before positioning the carrier on the downstream split rail. Switching to traction by the medium speed traction drive means and conveying the carrier;
The method of carrying in and carrying out a to-be-processed object with respect to the surface treatment area | region of Claim 6 provided with these.

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