JP5669017B2 - Traveling immersion processing equipment - Google Patents

Description

  The present invention relates to a traveling immersion treatment apparatus for an automobile body.

  As a traveling type immersion treatment apparatus, as described in Patent Document 1, a traveling body that travels along an immersion treatment bath is rotated by a rotation shaft that horizontally traverses the immersion treatment bath and the rotation shaft. A rotating-type dipping process in which a rotating shaft driving means is provided, a work supporting means is provided on the rotating shaft, and the workpiece to be processed supported by the work supporting means can be immersed in the dipping bath by rotation of the rotating shaft. The device is known.

JP 2008-1003003 A

  When this type of traveling type immersion treatment apparatus is used in a car body coating system, as is well known in the art, a long and large car body is supported in a state in which the length direction is supported in parallel with the conveying direction. In order to immerse the vehicle body in the immersion treatment bath, the vehicle travels in a state where the vehicle body is positioned on the immersion treatment bath. When the rotation shaft at a fixed position on the body is driven and rotated in the forward rotation direction, the forward rotation trajectory of the vehicle body in an upright posture supported horizontally above the rotation shaft at the fixed position is A round shape centered on the rotation axis and having a radius to the corner of the vehicle body that is farthest from the rotation axis, and the vehicle body is turned forward from both front and rear end positions of the vehicle body in the upright posture. The movement trajectory is both forward and backward in the direction of travel of the carrier So that the overhangs. Therefore, in order to prevent the vehicle body that rotates forward from interfering with the vehicle body that is supported by the front and rear conveying traveling bodies, the pitch between the conveying traveling bodies is greatly widened compared to the overall length of the vehicle body. As a result, not only the transfer efficiency is lowered, but the total length of the immersion bath is increased, and the equipment cost and the running cost are increased.

  The present invention proposes a traveling immersion treatment apparatus capable of solving the above-described conventional problems, and the traveling immersion treatment apparatus according to the present invention described in claim 1 will be described later. In order to facilitate understanding of the relationship with the embodiment, the reference numerals used in the description of the embodiment are shown in parentheses, and a traveling body for transportation (1) traveling along the immersion treatment bath (2). ) Is provided with a rotating shaft (4) horizontally traversing the immersion treatment bath (2) and rotating shaft driving means (5) for rotating the rotating shaft (4), and a workpiece is attached to the rotating shaft (4). Traveling provided with support means (14) so that the workpiece (vehicle body W) supported by the work support means (14) can be immersed in the immersion treatment bath (2) by the rotation of the rotating shaft (4). In the mold immersion treatment apparatus, the transport traveling body (1) includes a travel drive means (3) having a variable travel speed, and a travel speed of the transport travel body (1). A traveling speed control device (6) that controls the rotational shaft (4) according to the rotation angle (θ) is provided, and the traveling speed control device (6) is supported by the work support means (14). The workpiece (vehicle body W) was separated from the rotating shaft (4) by a certain distance until it reached a 90-degree tilted posture in the forward rotation direction from an upright posture positioned horizontally above the rotating shaft (4). The forward traveling speed of the transport traveling body (1) is gradually decreased with respect to the reference transport speed with respect to the workpiece-side reference position (P), and the transport traveling body (1 ) Is gradually increased with respect to the reference transport speed, and the forward speed of the transport traveling body (1) is gradually decreased with respect to the reference transport speed until the 270-degree tilted posture returns to the original upright posture. The control is configured so that the forward rotation trajectory of the workpiece (vehicle body W) assumes a vertically long shape when the reference transport speed is assumed to be zero. To have.

  When carrying out the present invention, as described in claim 2, each transport traveling body (1) traveling on the same travel route is provided with a reference position on the workpiece side in each transport traveling body (1) ( P) is arranged so that the intervals in the traveling direction of the traveling body for transporting are equal, and the traveling speed control device (6) makes reference transportation for the reference position (P) on the workpiece side of each traveling body for transportation (1). Each transport traveling body (1) can travel forward so that the speeds are equal to each other.

  Specifically, as described in claim 3, the traveling speed control device (6) uses a vertical coordinate axis passing through the reference position P on the workpiece side as a reference coordinate axis X, and the rotation axis (4) A vertical coordinate axis passing through the axis is a control target coordinate axis x, and a displacement amount of the control target coordinate axis x relative to the reference coordinate axis X in the transport traveling body traveling direction, which is generated as a result of the travel speed control for the transport traveling body (1). δx, the rotation angle of the rotation shaft (4) is θ, and the rotation angle θ when the workpiece (vehicle body W) is in the upright posture and the reference coordinate axis X and the control target coordinate axis x coincide with each other. The traveling speed control of the transport traveling body (1) can be performed so that δx = X−Rsinθ is satisfied.

  Further, according to a fourth aspect of the present invention, each transport traveling body (1) includes a transport traveling body between the reference positions (P) on the workpiece side between the transport traveling bodies (1) adjacent to each other. Detection means (25) for detecting a state in which the interval in the traveling direction is narrow can be provided. Specifically, as described in claim 5, the detection means (25) includes a rod-shaped movable body (26) supported on the transport traveling body (1) so as to be capable of reciprocating in the traveling direction. A vertical vertical guide rail (27) attached to the body (26), a rotating arm (28) that rotates integrally with the rotating shaft (4), and the workpiece (vehicle body W) on the tip side of the rotating arm (28). ) Side engaging position (roller 29) that is pivotally supported so as to coincide with the reference position (P) and engages with the guide rail (27) so as to be movable up and down, provided at one end of the rod-shaped movable body (26). The detected portion (30) of the rod-shaped movable body (26) of the adjacent transport traveling body (1) provided at the other end of the detected portion (30) and the rod-shaped movable body (26), It can be composed of a detector (31) that detects when the distance in the traveling direction of the transport traveling body between the workpiece side reference positions (P) between the transport traveling bodies (1) adjacent to each other in the front and rear is narrowed. .

  According to the configuration of the first aspect of the present invention, when the rotary shaft on the transport traveling body that travels forward is rotated to rotate the workpiece in the forward rotation direction, the forward speed of the transport traveling body is increased or decreased. By simply shifting the speed, the forward rotation trajectory of the workpiece can be changed from a perfect circle to a vertically long shape with a narrow width in the front-rear horizontal direction.

  Therefore, when one work supported by the traveling body for conveyance located on the immersion treatment bath is rotated forward and the work is immersed in the immersion treatment bathtub, the traveling body traveling direction of the immersion treatment bath is moved. The length can be shortened, the floor surface utilization efficiency can be increased and the equipment cost can be reduced. Further, in the case where a plurality of transport traveling bodies are arranged in series and traveled, by adopting the configuration according to claim 2, the work that rotates forward is moved forward and backward as in the prior art. In order to prevent interference with an upright workpiece supported by the body or a workpiece rotating in the same way, the pitch between the transporting traveling bodies is greatly increased compared to the total length of the workpiece. There are no restrictions that must be kept. Therefore, not only can the pitch between the transfer traveling bodies be reduced to increase the transfer efficiency, but also the overall length of the immersion bath for immersing multiple workpieces at the same time is shortened, reducing equipment costs and running costs. Can be planned.

  The present invention can be easily and easily implemented by setting a speed control program in advance in the travel speed control device in accordance with the configuration of claim 3.

  In addition, when a large number of transport traveling bodies are arranged and traveled, the travel driving means, the travel speed control device, or the like is broken, or the speed control error is accumulated by the travel speed control device, or the transport travel body. When the distance between the transport traveling bodies adjacent to the front and back is unexpectedly narrowed due to slipping during traveling, the workpieces supported by the transport traveling bodies adjacent to the front and rear are at least immersed. Although it may interfere with each other and cause a very dangerous situation when rotating forward for processing, according to the configuration of claim 4, the transport traveling bodies adjacent to each other in the front-rear direction Since the detection means can detect that the situation has been reached before the interval between them exceeds the permissible range and unexpectedly narrows, the automatic stopping or warning of each conveyance traveling body is detected based on the detection signal of the detection means. Ringing, etc. The emergency measures required automatically to be executed, can be avoided in advance from becoming a dangerous situation, such as described above.

  As the detection means, for example, a distance sensor that measures and detects the distance between the transport traveling bodies adjacent to each other in the front and back is provided, and the distance between the transport traveling bodies adjacent to each other before and after the detection by the distance sensor is equal to or less than a set value. However, according to the configuration of claim 5, the traveling direction end of the transport traveling body is used as a detection surface such as a distance sensor. Even if the structure / shape is not suitable, it is possible to mechanically reliably detect that the distance between the front and rear transport traveling bodies is abnormally narrow, and to reliably avoid such a dangerous situation as described above. . In addition, when the interval between the transport traveling bodies adjacent to each other in the front and back is abnormally narrowed, the rod-like movable bodies included in the respective transport traveling bodies adjacent to the front and rear are configured to face each other and are adjacent to each other in the front and rear. It is also possible to mechanically secure the minimum distance between the transporting traveling bodies, and the safety can be further enhanced.

FIG. 1 is a partially longitudinal front view showing an embodiment of the present invention. FIG. 2 is a plan view of the same. FIG. 3 is a side view of the transport traveling body. FIG. 4 is configured such that the position of the rotation shaft for rotating the work support base is moved forward and backward in the traveling direction of the transporting body on the transporting traveling body without performing the traveling speed control for the transporting traveling body. It is a side view of the traveling body for conveyance. 5A to 5E are operation explanatory diagrams in the transport traveling body shown in FIG. 4, and FIG. 5F is an explanatory diagram for explaining the basis of a calculation formula used in the traveling speed control in the embodiment of the present invention. 6A to 6E are operation explanatory views of the transport traveling body of the present invention shown in FIG. FIG. 7A is a schematic side view showing the forward rotation trajectory of the workpiece when the speed of the conveyance traveling body is not controlled, and FIG. 7B is a schematic side view showing the forward rotation trajectory of the workpiece in the present invention. FIG. 8 is a side view showing the second embodiment. 9A to 9C are plan views for explaining the operation of the second embodiment. FIG. 10 is a partially longitudinal front view showing the main part of the second embodiment.

  The hardware configuration used in the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. 1 is a traveling body for transportation, 2 is an immersion arranged along the traveling path of the traveling body 1 for transportation. It is a processing bathtub. The traveling body 1 for transportation includes traveling driving means 3, a rotating shaft 4 extending horizontally from the traveling body 1 to the side where the immersion bath 2 is located, a rotating shaft driving means 5 for the rotating shaft 4, and the transport. A traveling speed control device 6 that controls the traveling speed of the traveling body 1 is provided.

  The travel drive means 3 of the transport traveling body 1 includes a front drive carriage 8 and a rear follower truck 9 that engage with one guide rail 7 laid on the travel path. , 9 are respectively attached to the bottom of the transport traveling body 1 so as to be rotatable around a vertical axis, and wheels 8a, 9a rolling on the upper horizontal rail portion of the guide rail 7 using H-section steel, A pair of left and right front and rear two pairs of front and rear vertical rollers 8b and 9b sandwiching the vertical plate portion of the guide rail 7 are provided, and the drive carriage 8 is equipped with a speed reducer that rotationally drives the wheels 8a. A motor 10 is provided. Accordingly, by operating the motor 10 with a speed reducer of the drive carriage 8 to rotationally drive the wheels 8a, the transport traveling body 1 can be moved forward along the guide rail 7, and the front and rear carriages 8, 9 are By rotating around the vertical axis with respect to the transporting traveling body 1, the horizontal curve path portion can also travel smoothly. In addition, it replaces with the back driven cart 9 and attaches the same drive cart as the front drive cart 8, and selectively drives one of the wheels 8a of the front and rear drive carts 8 according to the travel route section. It can also be configured.

  The rotating shaft 4 is horizontally supported by a pair of left and right bearings 11a and 11b attached on the transport traveling body 1 with a drive shaft portion 4a concentrically connected to an end portion on the transport traveling body 1 side. At the same time, the supporting roller 12 pivotally supported on the other end of the rotating shaft 4 by a supporting shaft parallel to the rotating shaft 4 sandwiches the immersion treatment bath 2 with the guide rail 7 of the transport traveling body 1. By being supported on the guide rail 13 laid in parallel with the guide rail 7 so as to be able to roll, it is configured to move integrally with the transport traveling body 1 while maintaining the horizontal and horizontal orientation. . A work support means 14 is attached to the rotating shaft 4. The work support means 14 supports a vehicle body W of a car, which is a work to be processed, in a direction in which the length direction thereof is parallel to the travel direction of the transport traveling body 1, and its detailed structure is illustrated. However, as is conventionally known, the vehicle body W can be firmly fixed in a state where the vehicle body W supported can be safely rotated around the rotation shaft 4 by the rotation of the rotation shaft 4. .

  The rotating shaft drive means 5 of the rotating shaft 4 includes a large-diameter spur gear 15 attached to the driving shaft portion 4a of the rotating shaft 4, a motor 16 with a speed reducer installed on the transport traveling body 1, and the speed reducer. The small-diameter spur gear 17 is attached to the output shaft of the attached motor 16 and meshes with the large-diameter spur gear 15. The traveling speed control device 6 controls the traveling speed of the transport traveling body 1, that is, the rotational speed of the motor 10 with a speed reducer of the traveling drive means 3 in accordance with the change in the rotation angle of the rotating shaft 4. A speed control program is preset.

  The traveling speed control of the transport traveling body 1 by the traveling speed control device 6 is performed when the vehicle body W supported by the work support means 14 is rotated forward around the rotating shaft 4 by the rotational drive of the rotating shaft 4. A reference configuration for mechanically obtaining a similar forward rotation trajectory will be described with reference to FIG. 4.

  On the transport traveling body 1, a movable base 20 is mounted on a guide rail 18 laid on the transport traveling body 1 via a slide guide 19 so as to be movable forward and backward in the traveling direction of the transport traveling body 1. The rotating shaft 4 and the rotating shaft driving means 5 are mounted on the movable base 20. At the free end of the drive shaft portion 4a of the rotating shaft 4, when the vehicle body W supported by the work support means 14 is in an upright posture located directly above the rotating shaft 4 in a horizontal front-rear direction, it stands up vertically upward. The rotating arm 21 is fixed in such a direction that the guide rail 22 is vertically fixed to the conveying traveling body 1 so as to overlap the outside of the rotating arm 21 in the vertically upward posture. On the outer side of the free end of the rotary arm 21, an engaging member, for example, a roller 23, which is engaged with the guide rail 22 so as to be movable up and down in the length direction (vertical vertical direction) is pivotally supported. The guide rail 22 has a vertical length that prevents the roller 23 from being disengaged from the upper and lower ends when the rotary arm 21 makes one rotation, and an intermediate position thereof rotates between the sides of the transport traveling body 1. The arm 21 is attached to the transport traveling body 1 by a support member 24 that secures a rotation space.

  In the configuration shown in FIG. 4, when the rotating shaft 4 (drive shaft portion 4 a) is rotationally driven and the vehicle body W supported on the work support means 14 is rotated forward around the rotating shaft 4, The roller 23 of the rotating arm 21 that rotates in the vertical direction moves up and down in a vertical vertical guide rail 22 fixed to the transporting traveling body 1 side, and the movable base 20 on which the rotating arm 21 is pivotally supported. Is driven in a direction opposite to the direction of the rotary arm 21 with respect to the rotary shaft 4, and the rotary shaft 4, the rotary shaft drive means 5, the work support means 14, and the vehicle body W supported by the movable base 20 are conveyed. The traveling body 1 is reciprocated.

  That is, as shown in FIGS. 5A to 5E, the movement of the vehicle body W when the rotation shaft 4 is rotated to rotate the vehicle body W supported by the workpiece support means 14 from the forward traveling body 1 is viewed from the conveyance traveling body 1. When the position of the roller 23 located at a certain distance from the rotating shaft 4 and at a certain position when viewed from the vehicle body W is a reference position P on the vehicle body W side, the vertical position coincides with the guide rail 22. The reference position P on the vehicle body W side moves up and down on the coordinate axis, that is, the reference coordinate axis X. When the vertical coordinate axis passing through the axis of the rotary shaft 4 on the movable base 20 that reciprocates back and forth with respect to the transporting traveling body 1 is a control target coordinate axis x, the vehicle body W is directed horizontally forward directly above the rotary shaft 4. In the standing upright posture (FIG. 5A) and the 180 degree tilted posture (FIG. 5C) in which the vehicle body W is positioned in the horizontal rearward direction directly below the rotation shaft 4, the control target coordinate axis x coincides with the reference coordinate axis X in the front-rear direction. Is equal to the rotation radius R of the roller 23 when the vehicle body W is turned 90 degrees in the forward rotation direction (FIG. 5B). The controlled object coordinate axis x is moved backward with respect to the reference coordinate axis X by the displacement amount -δx, and conversely, the vehicle body W is further rotated 90 degrees from the 180-degree inverted position (FIG. 5C) (FIG. 5D). Then, the reference seat is displaced by a displacement δx corresponding to the rotation radius R of the roller 23. Control target coordinate axis x is to leave the front with respect to the axis X.

  As is clear from the above operation, the conveyance traveling body 1 between the rotation shaft 4 and the reference position P on the vehicle body W side that rotates forward around the rotation shaft 4 with a radius R with respect to the rotation shaft 4. The horizontal distance in the traveling direction, that is, the displacement δx of the horizontal distance of the control target coordinate axis x with respect to the reference coordinate axis X accompanying the change in the rotation angle θ of the rotary arm 21 is the value when the vehicle body W is in the upright posture (FIG. 5A). When the rotation angle θ of the rotary arm 21 is zero, δx = X−Rsinθ is established. It is clear that the forward rotation trajectory of the vehicle body W when viewed from the reference coordinate axis X side has a vertically long shape in which the width in the front-rear horizontal direction is narrower than the height.

  In the present invention, the forward rotation trajectory of the vehicle body W has a vertically long shape. Instead of mechanically moving the position of the rotary shaft 4 on the transport traveling body 1 back and forth as described above, The transport traveling body 1 itself is moved back and forth with respect to the reference coordinate axis X so that the position of the rotary shaft 4 coincides with the control target coordinate axis x with the position fixed on the transport traveling body 1. is there.

  Specifically, it is assumed that the transport traveling body 1 is speed controlled so that the reference coordinate axis X passing through the reference position P corresponding to the position of the roller 23 on the vehicle body W side moves forward at a constant reference transport speed. As shown in FIG. 6, until the vehicle body W reaches the 90-degree tilted posture (FIG. 6B) in the forward rotation direction from the upright posture (FIG. 6A), the traveling body 1 for conveyance. Is gradually reduced so that the control target coordinate axis x passing through the position of the rotary shaft 4 is separated from the reference coordinate axis X by -δx when the 90 ° tilted posture (FIG. 6B) is reached. From the 90-degree fall position (FIG. 6B) to the 180-degree fall position (FIG. 6C), the forward speed of the transport traveling body 1 is gradually increased to reach the 180-degree fall position (FIG. 6C). When the control target coordinate axis x passing through the position of the rotation axis 4 is equal to the reference coordinate axis X, At the same time, the forward travel speed of the transport traveling body 1 is also returned to the reference transport speed, and the transport travel body 1 is transported until it reaches the 270-degree tilted posture (FIG. 6D) from the 180-degree tilted posture (FIG. 6D). When the forward speed of the traveling body 1 is gradually increased to reach the 270-degree tilting posture (FIG. 6D), the coordinate axis x to be controlled passing through the position of the rotary shaft 4 is separated from the reference coordinate axis X by δx. Until the original erect posture (FIG. 6E, FIG. 6A) returns from the 270-degree turning posture (FIG. 6D), the forward traveling speed of the transport traveling body 1 is gradually decreased to restore the original erect posture (FIG. 6E, FIG. 6A), the control target coordinate axis x passing through the position of the rotary shaft 4 coincides with the reference coordinate axis X, and at the same time, the forward speed of the transport traveling body 1 is returned to the reference transport speed. , The traveling speed control of the transporting traveling body 1 is performed, and the reference coordinate axis X The forward rotation trajectory of the vehicle body W when the reference transport speed is assumed to be zero is the same as the longitudinal forward rotation trajectory described with reference to FIGS. In order to obtain a narrow vertically elongated shape.

  That is, as shown in FIGS. 1 to 3, the rotating shaft 4 provided at a fixed position on the transport traveling body 1 is rotated by the rotating shaft driving means 5, and the vehicle body W is moved forward around the rotating shaft 4. When rotating, the travel speed of the transport traveling body 1 traveling forward at the reference transport speed is increased or decreased by the travel speed control device 6 by the travel drive means 3. A displacement amount δx when the control target coordinate axis x passing through the axis of the rotary shaft 4 moves back and forth in the traveling direction of the transport traveling body with respect to the reference coordinate axis X passing through the reference position P on the vehicle body W side separated by R. However, when the vehicle body W is in the upright posture and the reference coordinate axis X and the control target coordinate axis x coincide with each other, the rotation angle θ of the rotation shaft 4 is zero, and δx = X−Rsinθ is established. As shown, the forward speed of the transport traveling body 1 increases or decreases. Road speed controller 6 is configured to be. In other words, the rotation radius R of the reference position P that is a constant value and the above expression are set, and the position information of the reference coordinate axis X on the travel route of the transport traveling body 1 (changes at a constant reference transport speed). A speed control program in which the position information of the reference coordinate axis X) and the rotation angle θ information of the rotating shaft 4 are input as variables is set in the traveling speed control device 6, and this program increases or decreases the forward speed of the transport traveling body 1. As a result of the shift control being executed, the reference position P (reference coordinate axis X) on the vehicle body W side is moved forward at a constant reference transport speed as described above, and the position of the rotary shaft 4 (control target coordinate axis x) is changed to the above formula. By moving the vehicle back and forth so that the above is established, the forward rotation trajectory of the vehicle body W when the reference transport speed is assumed to be zero can be changed to a vertically long shape.

  As is clear from the above description, as shown in FIG. 7A, the vehicle body W that becomes a perfect circle when the rotating shaft 4 rotates at a fixed position on the transport traveling body 1 without performing shift control of the transport traveling body 1. Compared with the forward rotation trajectory, according to the configuration of the present invention described above, the forward rotation trajectory of the vehicle body W becomes vertically long as shown in FIG. Accordingly, the pitch between the transporting traveling bodies 1 is set so that the vehicle bodies W on the adjacent transporting traveling bodies 1 do not come into contact with each other regardless of the timing at which the vehicle body W rotates. When the forward rotation rotation trajectories of the vehicle body W in the traveling body 1 are set so as to be separated from each other while maintaining a safety interval in front and back, the pitch between the conventional transportation traveling bodies (between the vehicle bodies W) shown in FIG. In contrast to P1, in the present invention, the pitch P2 between the vehicle bodies W can be narrowed as shown in FIG. 7B.

  Note that the pitch P2 between the vehicle bodies W in the present invention shown in FIG. 7B is a pitch between the reference positions P set on the vehicle body W side, not the pitch between the transport traveling bodies 1. Basically, each transport traveling body 1 travels forward at the same reference transport speed so as to maintain this pitch P2, but the body W is rotated forward and immersed in the immersion treatment bath 2. In this situation, since each conveyance traveling body 1 is controlled to increase or decrease with respect to the reference conveyance speed, the pitch between the conveyance traveling bodies 1 is the pitch P2 between the vehicle bodies W (between the reference positions P of the vehicle bodies W). Increases or decreases with respect to. Accordingly, the transport traveling body 1 includes the range of the forward rotation trajectory of the vehicle body W that is vertically long, including the amount of front and rear movement with respect to the reference coordinate axis X when the increase / decrease speed control is performed with respect to the reference transport speed as described above. It must be short enough to always fit within. By setting the overall length of the transport traveling body 1 in this manner, when each transport traveling body 1 travels in the immersion treatment section provided with the immersion treatment bath 2, the top of each transport traveling body 1 is set. Even if the vehicle body W is rotated forward at an arbitrary timing, there is no possibility that the transport traveling bodies 1 adjacent to each other and the vehicle body W on the transport traveling body 1 interfere with each other. Accordingly, by executing the rotation driving of the rotating shaft 4 and the increase / decrease speed control of the traveling speed of the conveying traveling body 1 by the traveling speed control device 6 in the order in which each traveling traveling body 1 enters the immersion treatment section. The vehicle body W on each transport traveling body 1 is rotated forward to pass through the vehicle body W while being immersed in the treatment liquid in the immersion treatment bath 2 and in order of exiting from the immersion treatment section. The vehicle body W on the traveling body 1 can be returned to the original upright posture and transported.

  In the case where the present invention is carried out, there is an undeniable possibility that the current position of the transport traveling body 1 may unexpectedly fluctuate from the theoretical position due to various reasons as described above. A second embodiment for dealing with such a case will be described with reference to FIGS.

  In the second embodiment, each transport traveling body 1 has an interval in the transport traveling body travel direction between the reference positions P on the vehicle body W side between the transport traveling bodies 1 adjacent to each other (shown in FIG. 7B). A detecting means 25 for detecting a state in which the pitch P2) is narrowed is provided. Specifically, the detection means 25 includes a rod-shaped movable body 26 supported by the transport traveling body 1 so as to be reciprocally movable in the traveling direction, a vertical vertical guide rail 27 attached to the rod-shaped movable body 26, A rotary arm 28 that rotates integrally with the rotary shaft 4, and an engagement that is pivotally supported on the front end side of the rotary arm 28 so as to coincide with the reference position P on the vehicle body W side and engages with the guide rail 27 so as to be movable up and down. It comprises a roller 29 as a member, a detected portion 30 provided at one end of the rod-like movable body 26, and a detector 31 provided at the other end of the rod-like movable body 26.

  More specifically, the rod-shaped movable body 26 is slightly smaller than the maximum width in the front-rear direction of the longitudinal forward rotation trajectory of the vehicle body W when the reference position P of the vehicle body W does not move in the traveling direction of the transport traveling body 1. It has a long overall length, in other words, an overall length that is slightly shorter than the pitch P2 between the reference positions P of the vehicle body W shown in FIG. 7B, a slide guide 32 attached to the transport traveling body 1 side, The movable body 26 is supported on the lateral side portion of the transport traveling body 1 via a slide rail 33 that is provided along the length direction of the movable body 26 and engages with the slide guide 32. The vertical vertical guide rail 27 has a total length slightly more than twice the rotation radius of the roller 29 accompanying the rotation of the rotary arm 28, and the center position in the length direction coincides with the position of the rotary shaft 4. As described above, the rod-shaped movable body 26 is fixed to the inside of the substantially central position in the length direction. The detected part 30 is attached to the rear end upper side of the rod-like movable body 26 so as to extend rearward, and the detector 31 is forward from the upper side of the front end of the rod-like movable body 26 at a higher level than the detected part 30. Is attached to the lower side of the tip of the attachment member 26a attached so as to extend in the direction between the reference position P (roller 29) on the vehicle body W side between the conveyance traveling bodies 1 adjacent to the front and rear. When the interval in the travel direction of the traveling body is narrowed to a set value or less, the detected portion 30 faces the detected portion 30 of the rod-like movable body 26 of the immediately preceding transport traveling body 1 with a small gap therebetween. Is detected.

  According to the configuration of the second embodiment, when the rotating shaft 4 is rotated and the vehicle body W is rotated forward, the rotating arm 28 that rotates around the rotating shaft 4 integrally with the vehicle body W is a roller. The rod-shaped movable body 26 is reciprocated back and forth with respect to the transport traveling body 1 via the guide rail 27 and the guide rail 27, and the guide rail 27 to which the roller 29 positioned at the reference position P on the vehicle body W side is fitted. 9 and the rod-shaped movable body 26 are integrated, the reference position P (roller 29) on the vehicle body W side and the rod-shaped movable body 26 do not move relative to each other in the traveling direction of the transport traveling body 1, as shown in FIG. In other words, when the vehicle body W in the upright posture is transported by each transporting traveling body 1, or when the vehicle body W is rotated forward around the rotating shaft 4 according to the configuration of the present invention described above. In any case where the increase / decrease shift control of the forward speed of the traveling body 1 is performed, the position of the rod-shaped movable body 26 does not change with respect to the reference coordinate axis X passing the reference position P (roller 29) on the vehicle body W side. While the reference position P on the W side is traveling forward while maintaining the pitch P2 shown in FIG. 7B at the reference transport speed, a certain gap is secured between the rod-like movable bodies 26 of the transport traveling bodies 1. It will be. In this situation, the detector 31 at the front end of the rod-like movable body 26 provided in the rear transfer traveling body 1 is compared with the detected portion 30 at the rear end of the rod-like movable body 26 provided in the front transfer traveling body 1. The state where the detector 31 is not detecting the detected portion 30 is maintained at a position slightly rearward.

  In addition, due to various causes as described above, the actual forward speeds of the respective transport traveling bodies 1 vary, and the transport between the reference positions P on the vehicle body W side supported and transported by the respective transport traveling bodies 1 is performed. When the interval in the traveling direction of the traveling body fluctuates, the rear-side transportation traveling in which the reference transportation speed of the reference position P on the vehicle body W side is relatively high among the two transportation traveling bodies 1 adjacent to the front and rear. The rod-shaped movable body 26 of the body 1 moves relatively close to the rod-shaped movable body 26 of the front-side transport traveling body 1 on the speed-lowering side, and the rod-shaped movable body 26 of the rear-side transport traveling body 1 moves. The detector 31 provided at the front end overlaps the detected portion 30 provided at the rear end of the rod-like movable body 26 of the front traveling traveling body 1 to detect the detected portion 30.

  That is, it is detected by the detector 31 of the rear transport traveling body 1 that forms the interval that the interval in the traveling direction of the transport traveling body between the reference positions P on the vehicle body W side is narrower than the set interval. Therefore, based on the signal of the detector 31, the rear traveling traveling body 1 that is traveling forward at a relatively high speed on the side provided with the detector 31 can be Deceleration is performed until the detection signal from 31 is turned OFF, and correction can be made so as to widen the interval in the traveling direction of the conveying traveling body between the reference positions P on the vehicle body W side. Of course, it is also possible to automatically activate alarm means for notifying an abnormality based on the detection signal of the detector 31. For example, each transporting traveling body 1 in front of the immersion treatment section provided with the immersion treatment bath 2 is provided. Is automatically stopped based on the detection signal, and all the transport traveling bodies 1 in the immersion treatment section and on the lower side of the section are used as the reference on the vehicle body W side for each transport traveling body 1 based on the detection signal. When the forward speed control for avoiding the interval in the traveling direction of the traveling traveling body between the positions P is narrowed, when all the traveling traveling bodies 1 in the immersion treatment section are retracted to the lower side from the section, It is also possible to automatically stop all the traveling bodies 1 for conveyance.

  Further, the detected part 30 is provided in two stages in the front and rear, and the detection of the first stage detected part is detected by the detector 31 so that the deceleration control of the rear conveyance traveling body 1 is performed, and the second stage detected part is detected. It is also possible to configure the rear transport traveling body 1 and all the transport traveling bodies 1 on the upper side thereof to make an emergency stop when the detector 31 detects the part. Further, after the detector 31 detects the detected portion 30, the deceleration control for the rear traveling body 1 is not performed as expected, and the detector 31 passes forward over the detected portion 30. When this occurs, the rod-like movable bodies 26 of the front and rear transport traveling bodies 1 collide with each other, and it is mechanically compulsory that the interval between the reference positions P on the vehicle body W side of the front and rear transport traveling bodies 1 is further reduced. It can be configured to prevent it. Of course, when the rod-like movable bodies 26 of the front and rear transport traveling bodies 1 collide with each other, the interval between the reference positions P on the vehicle body W side of the front and rear transport traveling bodies 1 is set to the minimum allowable range. It is what you make up.

  The traveling type immersion treatment apparatus of the present invention is utilized as a means for performing immersion treatment by rotating a vehicle body that is supported horizontally forward on a traveling body for conveyance in a liquid to be treated while being conveyed in a coating system for a vehicle body of an automobile. I can do it.

W Car body (work)
DESCRIPTION OF SYMBOLS 1 Transporting body 2 Immersion bath 3 Traveling drive means 4 Rotating shaft 5 Rotating shaft driving means 6 Traveling speed control device 7, 13, 18, 22, 27 Guide rail 8 Drive cart 9 Driven cart 10, 16 Motor with reduction gear DESCRIPTION OF SYMBOLS 11 Rotating shaft 12 Roller for support 14 Work support means 15 Large diameter spur gear 17 Small diameter spur gear 20 Movable base 21, 28 Rotating arm 23, 29 Roller 24 Support member 25 Detection means 26 Rod-shaped movable body 30 Detected part 31 Detector

Claims (5)

  The transport traveling body that travels along the immersion treatment bath is provided with a rotation shaft that horizontally traverses the immersion treatment bath and a rotation shaft drive unit that rotationally drives the rotation shaft, and a work support unit is provided on the rotation shaft. In the traveling type immersion treatment apparatus capable of immersing the workpiece to be processed supported by the workpiece support means in the immersion treatment bath by the rotation of the rotating shaft, the conveyance traveling body includes a traveling drive means having a variable traveling speed. And a traveling speed control device that controls the traveling speed of the transport traveling body in accordance with the rotation angle of the rotating shaft, and the traveling speed control device is configured to rotate the workpiece supported by the workpiece support means. From the upright position, which is positioned horizontally right above the axis, to the 90 degree tilted position in the forward rotation direction, for the transfer relative to the reference transfer speed with respect to the reference position on the workpiece side that is a fixed distance away from the rotation axis Run The forward speed of the body is gradually decreased, and the forward speed of the transport traveling body is gradually increased with respect to the reference transport speed until reaching the 270-degree inverted position from the 90-degree inverted position. Until it returns to the standing posture, the forward traveling speed of the workpiece is controlled to gradually decrease with respect to the reference transport speed, and the forward rotation trajectory of the workpiece when the reference transport speed is assumed to be zero A traveling type immersion treatment apparatus configured as described above.   The transport traveling bodies traveling on the same travel route are arranged such that the intervals in the traveling direction of the transport traveling body between the reference positions on the workpiece side in each transport traveling body are equal, and the travel speed control device is The traveling type immersion treatment apparatus according to claim 1, wherein the forward traveling speed of each transport traveling body is controlled so that the reference transport speeds relative to the reference position on the workpiece side of each transport traveling body are equal to each other.   The travel speed control device uses the vertical coordinate axis passing through the workpiece-side reference position P as the reference coordinate axis X, and the vertical coordinate axis passing through the axis of the rotation axis as the control target coordinate axis x, and the travel speed control for the transport traveling body. The displacement of the controlled object coordinate axis x relative to the reference coordinate axis X in the direction of travel of the transporting traveling body is δx, the rotation angle of the rotation axis is θ, and the workpiece is in the upright posture and the reference coordinate axis The rotational speed θ of the conveyance traveling body is controlled so that δx = X−Rsinθ is satisfied, with X being the rotational angle θ when X and the coordinate axis x to be controlled coincide with each other. The traveling type immersion treatment apparatus according to claim 1 or 2.   Each conveyance traveling body is provided with detection means for detecting a state in which a distance in the traveling direction of the conveyance traveling body between the reference positions on the workpiece side between the conveyance traveling bodies adjacent to each other is narrowed. Item 4. A traveling immersion treatment apparatus according to item 2 or 3.   The detection means is a rod-like movable body supported by the conveyance traveling body so as to be reciprocally movable in the running direction, a vertical vertical guide rail attached to the rod-like movable body, a rotating arm that rotates integrally with the rotating shaft, An engagement member that is pivotally supported on the tip end side of the rotating arm so as to coincide with the reference position on the workpiece side and engages the guide rail so as to be movable up and down; a detected portion provided at one end of the rod-shaped movable body; And the other end of the rod-shaped movable body for conveying the detected portion of the rod-shaped movable body of adjacent conveyance traveling bodies between the reference positions on the workpiece side between the conveyance traveling bodies adjacent to each other. The traveling type immersion treatment apparatus according to claim 4, comprising a detector that detects when the interval in the traveling body traveling direction is narrowed.

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