JPH07115262B2 - Work positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of Industrial Application The present invention is designed in advance for placing a work on a work placing portion on a transport carriage that travels on a transport path. The present invention relates to a work positioning device capable of correcting and positioning the work to an alignment position with respect to a transport carriage.

(2) Conventional Technology A conventional work positioning device for positioning a work on a carrying table at a carry-in portion of a conventional carrying path is, for example, the actual open sho 61.
-102447 is disclosed.

(3) Problems to be Solved by the Invention However, in the above-mentioned conventional one, since the position of the work is corrected by the pushing member driving device from the front and rear and the left and right directions of the work, the pushing member is driven. In addition to requiring a large number of devices, it is necessary to attach a device for retracting the pushing member arranged in front of the work from the work transfer area so as not to interfere with the transfer of the work. There is a problem that the configuration of the positioning device becomes complicated and the cost is increased.

The present invention has been made in view of the above circumstances, and makes it possible to reduce the number of work pressing devices for positioning a work and to greatly simplify the entire structure of the work positioning device by eliminating the retracting device. It is an object of the present invention to provide a work positioning device capable of solving the above problems.

B. Configuration of the Invention (1) Means for Solving the Problems According to the present invention, a work for positioning and placing a work on a work placing portion of a transport carriage that can be moved up and down in order to achieve the above object. A positioning device, left and right front work placement tables and left and right rear work placements, which are respectively arranged on the front and rear sides of a transport carriage that stops at the loading section of the transport path so as to be movable in the traveling direction of the transport carriage. A mounting table; a connecting frame that integrally connects the left and right front work mounting tables and the left and right rear work mounting tables; a drive device that drives the connecting frame forward and backward in the traveling direction of the transport vehicle; And a detection device for detecting the front end position of the work, and the left and right front work mounting tables and the left and right rear work mounting tables are both the work seat and the side of the work. Before pressing from one side, rear work And a pressing mechanism.

In the above-mentioned configuration, the work may be any one other than the car body, and the carrier may be of any type as long as it is provided with a work mounting table that can be raised and lowered.

(2) Operation The work is shifted forward from the fixed position at the loading part of the transport path and placed on the left and right front and rear mounting tables, and by the operation of the front and rear work pressing mechanisms provided on these mounting tables, respectively. The width direction of the work is corrected and the work is fixed on the mounting table. Next, by operating the drive device, the front left and right front and rear mounting bases are simultaneously advanced to activate the detection device, correct the front-back direction of the work and hold it in a fixed position, and in this state, raise the mounting base of the transport carriage. Then, this is connected to the work and the carrier is moved to another station.

(3) Example Hereinafter, one example of the present invention will be described with reference to the drawings.

In the present embodiment, in the case where the vehicle body Bo as a work loaded into the carrier truck Tr on the carrier path arranged along the automobile assembly line is corrected to a fixed position on the carrier truck Tr and can be positioned. Then, in the following explanation, "before, after",
"Left, right" is based on the forward direction of the carrier truck Tr.

A transfer pit Pi is provided along the assembly line on the work floor Fl in the factory, and a floor surface 1 flush with the work floor Fl is laid on the upper opening of the transfer pit Pi.

A transport path 2 made of a square tubular material is provided at an intermediate portion in the width direction of the transport pit Pi. This transport path 2 has its carry-in section A.
In, is isolated as indicated in the first figure serves more the separation conveyance path 2 ₁ of a predetermined length, the separating and conveying path 2 _1, the pit
It is possible to move up and down by a conventionally known lift mechanism Li provided in the Pi.

The separating and conveying path 2 ₁ is straddled possible travel transport vehicle Tr, automobile body Bo as a work on the conveyance carriage Tr
Is positioned and placed.

The carrier truck Tr is self-propelled, and a substantially horizontal lift table 5 is provided on the carriage frame 3 through a lift mechanism 4 so that the lift table 5 is vertically movable. It is supported so that it can swivel approximately horizontally about the central axis,
Positioning pins 20, 20 ... Are projectingly provided on the front part of the pallet Pa as a work placement part on the swivel base 6, and vehicle body clamps Cl, Cl are provided on the rear part of the pallet Pa.
... is inserted into the pin holes h, h on the bottom surface of the car body Bo, and the car body Bo is clamped from the side by the left and right car body clamps Cl, Cl, so that the car body Bo is mounted on the pallet Pa.
Can be positioned. The plurality of carrier trucks Tr respectively extend in the front-rear direction at the front portion and the rear portion of the carriage frame 3 of each carrier truck Tr so as to maintain a constant distance between the preceding carrier truck and the following carrier trucks. Rod-shaped front and rear spacing members 7 and 8 are fixed.

A large number of rolling rollers 9 are rotatably supported at upper portions on the left and right side surfaces of the conveying path 2 at intervals in the longitudinal direction thereof, and these rolling rollers 9 are mounted on the bogie frame 3 of the conveying carriage Tr. The traveling rails 10, 10 provided are engaged so that they can travel freely.

A carriage motor 11 is supported on a carriage frame 3 of the carriage Tr, and a pinion 12 that is interlocked with the carriage motor 11 is meshed with a rack 13 provided on the side surface of the carriage path 2 over its entire length. ing. Therefore, the traveling motor 11
When is driven, the pinion 12 rolls on the rack 13 so that the carrier truck Tr can self-propel along the carrier path 2.

The upper part of the bogie frame 3 projects upward through the slits 14, 14 of the floor surface 1, and an elevating mechanism 4 for elevating the pallet Pa on which the vehicle body Bo is placed is provided on the upper part thereof. The elevating mechanism 4 includes a pair of left and right cross links 15 whose middle portions are rotatably supported by pivots, and an elevating cylinder 16 that extends and contracts the links 15. On the lift table 5, a swivel base 6 for supporting and swiveling the vehicle body Bo is supported so as to freely swivel around a vertical center axis, and a drive for swiveling the swivel base 6. The unit 17 is supported by the carriage frame 3 of the transport carriage Tr. A vehicle body front support arm 18 and a vehicle body rear support arm 19 extending in the diametrical direction are provided on the swivel base 6 so as to extend substantially horizontally.

As shown in FIGS. 1 and 2, an automobile body suspended from a hanger H of a drop lifter (not shown) at the carry-in portion A of the transport path 2.
After Bo is lowered and positioned at a fixed position by the work positioning device provided in the carry-in section A, the work placing section of the carrier truck Tr, that is, the pallet Pa is lifted to be placed on the carrier truck Tr and the pallet Pa. Positioning pins 20,20…
Is fitted into the pin holes h of the car body Bo, and the car body Bo is positioned by clamping the car body Bo from both sides by the left and right car body clamps Cl, Cl.

By the way, the configuration of the positioning device of the present invention for positioning the vehicle body Bo at a fixed position in the carry-in section A of the transport path 2 when the vehicle body Bo is placed on the transport vehicle will be described next. This device is equipped with a work pressing mechanism 21,21.
Left and right front work placement tables Sf, Sf, and left and right rear work placement tables Sr, Sr provided with other work pressing mechanisms 22, 22.
And a drive device Dr for moving the front and rear work rests Sf, Sf and Sr, Sr together with the work, that is, the vehicle body Bo, and a detection device De for detecting the front end position of the vehicle body Bo. To be done.

First, the configuration of the pair of left and right front work placement tables Sf, Sf will be described. As shown in FIGS. 1 to 3, the left and right front work mounting tables Sf, Sf are symmetrically provided on the bases 23, 23 disposed on the left and right of the transport path 2, respectively. Since they have the same structure, one of them will be described in detail. A pair of guide rails 24, 24 are laid on the base 23 in the same direction as the transport path 2, and a moving table 25 is placed on the rails 24, 24.
Is slidably laid. The lower ends of the parallel links 26, 26 are pivotally supported 27, 27 on the moving table 25 so as to be swingable in the direction orthogonal to the transport path 2, and the support members 28 are pivotally connected to the free ends of the parallel links 26, 26. 29,29 will be done. The flat upper surface of the support member 28 supports a receiving seat 30 to which an elastic material is attached on the upper surface via a free bearing, and the front vertical frame f ₁ of the vehicle body Bo is placed on the receiving seat 30. It Also the support member 28
A push member 31 is pivotally supported on one of the pivotally connected portions 29, and the push member 31 has a support member 28 for swinging the push member 31.
The pressing cylinder 32 provided in the is connected. This pushing member 31
A pressing piece 33 made of an elastic material is fixed to the free end of the pressing piece 33 by the extension operation of the pressing cylinder 32.
Can be pressed against the outer surface of the front vertical frame f ₁ of the car body Bo.

Next, the structure of the pair of left and right rear work placement tables Sr, Sr will be described with reference to FIGS.
The left and right rear work placement tables Sr, Sr are symmetrically provided on the bases 35, 35 disposed on the left and right of the above, respectively.
Since they have the same structure, one of them will be described in detail. A pair of guide rails 36, 36 are laid on the base 35 in the same direction as the transport path 2, and a moving table 37 is provided on the rails 36, 36. Is slidably mounted. Moving table 37
A bracket 38 that bends in a dogleg shape is erected upright, and a seat 39 to which an elastic material is attached is fixed to the flat upper surface of the bracket 38 via a free bearing.
The rear vertical frame f ₂ of the car body Bo is placed on the 39.
A pushing member 40 is pivotally supported 41 on the bracket 38, and a pushing cylinder 42 for swinging the pushing member 40 is connected to the pushing member 40. A pressing piece 43 made of an elastic material is fixed to the free end of the pressing member 40, and the pressing cylinder 43 is contracted to press the pressing piece 43 against the outer surface of the rear vertical frame f ₂ of the automobile body Bo. You can

As clearly shown in FIG. 2, the left and right front mounting tables Sf, S
The movable tables 25, 25 of f and the movable tables 37, 37 of the left and right rear mounting tables Sr, Sr are connected by a planar U-shaped connecting frame 44 so as to be integrally movable back and forth. Connection frame 44
The driving device Dr is connected to the rear part of the device. That is, a slider 45 is integrally provided at the center of the rear portion of the connecting frame 44, and the slider 45 is supported slidably back and forth on a guide rail 48 laid on a frame 47 fixed to a base 46. It The slider 45 has the frame
A drive motor 49 supported on 47 is connected. By the expansion / contraction operation of the drive motor 49, the left and right front and rear mounting tables Sf, Sf, Sr, Sr can be moved back and forth all at once via the connecting frame 44.

Next, the structure of the detection mechanism De for detecting the front end position of the vehicle body Bo on the carrier truck Tr will be described.
In FIG. 2, a pole 50 is erected on the front part of the base 23 of the above-mentioned mounting table Sf on the right side, and a support arm 51 extending substantially horizontally is supported by a support shaft 52 on the upper end of the pole 50. , This support arm 51 is a drive mechanism consisting of a rack cylinder and a pinion.
It is rotated about the vertical axis by 53. A detection rod 54 extending in a substantially horizontal direction is slidably supported on the tip of the support arm 51, and the detection rod 54 is returned to a neutral position by a return spring in the support arm 51. A proximity switch 55 supported by the support arm 51 is arranged at the base of the detection rod 54. The support arm 51 rotates about 180 ° between the detection position a shown by the solid line in FIG. 2 and the non-detection position b shown by the chain line in FIG. 2, and when the support arm 51 is at the detection position a, the tip of the detection rod 54 is an automobile. When it abuts against the front wall f ₃ of the front part of the vehicle body Bo, the detection rod 54 slides at this time and actuates the proximity switch 55 to detect the position of the vehicle body Bo in the front-rear direction.

Next, the operation of this embodiment will be described.

The vehicle body Bo, which has been carried onto the carry-in section A of the carrying path 2 by an overhead conveyor (not shown), is hung by the hanger H of the drop lifter and left and right front and rear mounting tables S
It is placed on the upper surface of f, Sf and Sr, Sr. At this time, as shown in FIG. 1, the car body Bo is moved forward and backward from the fixed position P ₁ by a displacement distance d (about 100 mm) at a displacement position P ₂ , left and right front and rear mounting tables Sf, Sf and Place it on Sr, Sr. The rearward shift distance d is set to be larger than the error in the front-rear direction actually expected when the automobile body Bo is placed on the mounting tables Sf, Sf and Sr, Sr.

Next, the front and rear vertical frames f ₁ and f ₂ of the vehicle body Bo are activated by operating the front and rear work pressing mechanisms 21, 21 and 22, 22 provided on the left and right front and rear mounting tables Sf, Sf and Sr, Sr. The car body Bo is clamped from the outside and the car body Bo is placed on the left and right front and rear mounting tables Sf, Sf.
And Sr and Sr are fixed, and the position of the vehicle body Bo in the width direction is aligned.

Next, the driving device Dr is operated to move forward the left and right front and rear mounting tables Sf, Sf and Sr, Sr all at once via the connecting frame 44.
When the vehicle body Bo moves forward and comes to a fixed position, its front wall f ₃ comes into contact with the detection rod 54 of the detection device De to operate it, and operates the proximity switch 55 to stop the advancement of the connecting frame 44. Fix the car body Bo to a fixed position and stop it.

When the automobile body Bo stops at a fixed position, the placing portion of the carrier truck Tr, that is, the pallet Pa is raised to place the automobile body Bo on the pallet Pa, and the positioning pins 20 ... on the pallet Pa are attached to the automobile body Bo. It fits into the pin holes h ... on the bottom surface, and the vehicle body Bo is positioned on the pallet Pa by clamping the vehicle body Bo from both sides by the left and right vehicle body clamps Cl, Cl.

Next, the left and right front and rear mounting tables Sf, Sf and Sr, Sr front and rear work pressing mechanisms 21, 21 and 22, 22 are released as shown by the chain lines in Fig. 3 and 4, and left and right front mounting is performed. The mounting tables Sf, Sf are retracted as shown by the chain line in FIG. 3, and the detection rod 54 is further rotated to the non-detection position as shown by the chain line in FIG. After that, the carrier truck Tr is caused to travel by itself and moved from the carry-in section A to another work station.

C. Effect of the Invention As described above, according to the present invention, the work is positioned in the width direction by correcting the position in the width direction by the pressing mechanism of the left and right front and rear mounting tables provided on both sides of the work. Further, since the position of the work in the front-rear direction can be corrected and the work can be positioned in the front-rear direction only by correcting the forward direction of the work by the drive device and the detection device, it is possible to position the work forward in the conventional direction. A pressing mechanism is unnecessary, and an auxiliary device for retracting the pressing mechanism from the conveying path for advancing the vehicle body is also unnecessary, greatly simplifying the configuration of the work positioning device as a whole. The cost can be reduced and the work position correction work can be facilitated.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a side view thereof, FIG. 2 is a plan view taken along the line II of FIG. 3, and FIG.
A sectional view taken along the line III-III, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. A: Carry-in department, Bo ... Car body as work, De ...
… Detection device, Dr …… Drive device, Pa …… Pallet as a work rest part, Sf …… Front work rest stand, Sr …… Rear work rest stand, Tr …… Transport carriage, 2 …… Conveyance path, 21,22 ...
… Work pressing mechanism, 30,39 …… Catch, 44 …… Coupling frame

Claims (2)

[Claims] 1. A work positioning device for positioning and placing a work (Bo) on a work placing part (Pa) which can be moved up and down, of a transfer carriage (Tr), and which carries in a transfer path (2). The carriages (Tr) stopped at the section (A) are arranged respectively on the front and rear sides so as to be movable in the traveling direction of the carriages (Tr).
Left and right front work rests (Sf, Sf) and left and right rear work rests (Sr, Sr); and the left and right front work rests (Sf, Sf) and left and right rear work rests (Sr) , Sr) are integrally connected, and a drive device (Dr) that drives the connection frame (44) back and forth in the traveling direction of the carrier vehicle (Tr);
The left and right front work rests (Sf, Sf) are arranged in front of the work (Bo) on the transfer carriage (Tr), and include a detection device (De) for detecting the front end position of the work (Bo). And the left and right rear work rests (Sr, Sr) are
o) seat (30, 30; 39, 39) and front and rear work pressing mechanism (21, 21; 22, 22) for pressing the work (Bo) from the side Work positioning device. 2. The work positioning device according to claim 1, wherein the left and right front work mounting tables (S
f, Sf) seat (30, 30) and front work pressing mechanism (21,
21) is the transport path (2) to evacuate to the outside of the transport path (2)
Workpiece positioning device that can move forward and backward with respect to.