JPH0418744Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a workpiece positioning device, and particularly to a device suitable for positioning multiple types of vehicle bodies when conveying them on an automobile body assembly line. It is something.

BACKGROUND OF THE INVENTION For example, a plurality of types of automobiles are produced on the same production line, and each vehicle body is conveyed with the rear portion of the vehicle body positioned by a conveying device equipped with a base plate installed to enable square motion. However, since the size and shape of the car body differ depending on the car model, the positioning position of the rear of each car body is shifted in the transport direction. A dedicated positioning jig was used depending on the situation.

Problems that the invention aims to solve Conventionally, a dedicated positioning device was required depending on the car model, which required a large installation space to install multiple jigs. The problem was that the work was complicated and the workability was extremely poor.

Means for Solving the Problems The present invention was proposed in view of the above-mentioned problems. A fixing pin, a mounting piece that is pivotally mounted on the base plate via a bracket so as to be swingable, and a mounting piece and a pressing piece that is pressed by a workpiece transferred onto the base plate are formed on both sides of the pivot joint. It consists of a swinging arm and a movable pin that is fixed to the tip of the mounting piece of the swinging arm and is held waiting downward at a position shifted by a predetermined distance from the fixed pin, and the shape of the workpiece transferred onto the base plate. The swing arm is pressed and swung using the difference, and either the fixed pin or the movable pin is selectively inserted into and latched into the positioning hole of the work depending on the type of work. It is.

Operation When the workpiece transferred onto the base plate is of a shape that is held in a non-contact state with the swing arm, a fixing pin is inserted into the positioning hole of the workpiece to position the workpiece. At this time, the swing arm does not swing, and the movable pin fixed to the tip thereof is held in a standby position below.

Furthermore, if the workpiece transferred onto the base plate is held in contact with the swinging arm and held in a non-contact state with the fixing pin, the swinging arm is pressed by the workpiece and pivots. The movable pin is rotated about the mounting portion as a fulcrum, and as the swing arm rotates, the movable pin projects upward and is fitted into and locked in the positioning hole of the workpiece. At this time, the workpiece is held in a non-contact state with the fixing pin.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. In the drawings, reference numerals 1 and 1' indicate multiple types of workpieces, such as car bodies, which are sequentially transferred through N work processes arranged horizontally at predetermined intervals. It is held in a workpiece installation part (not shown). Reference numeral 2 denotes a plurality of carts for transporting the car bodies 1 and 1' for each work process, and these carts 2 are arranged below the workpiece installation section and are provided with rails (not shown in the figure) installed along the work process. ) by the rotation of the wheels 3. The above-mentioned trolley 2 has a support base 4
A base plate 6 is attached to the top via a lifting support device 5 having a pantograph type structure, and each trolley 2 is connected to a connecting tool 7.
are connected by. The base plate 6 of each of the above-mentioned carts 2 is moved in a square mode as shown by the dashed line in FIG. It is arranged so that it can be moved.

8 is a hollow shape fixed along the width direction on the upper surface 10 of the rear end portion 9 of the base plate 6 constituting the truck 2;
Further, a fixed frame having a rectangular cross section, 11 a mounting bracket fixed to a predetermined portion of the upper surface 12 of the fixed frame 8 toward the rear, and 13 fixed to the upper surface 15 of the tip end 14 of the mounting bracket 11 so as to stand upright. The fixed pin 16 held is a support bracket fixed to the front surface 17 of the fixed frame 8, and this support bracket 16 is formed in an arc shape diagonally upward, and a stopper piece 1 is attached below the tip 18.
9 is installed protrudingly. Reference numeral 20 denotes a swinging arm pivotally attached to the distal end 18 of the support bracket 16 via a pivot 21, and this swinging arm 20
Forms a pressing piece 22 curved in an arc diagonally upward on the front side of the pivot 21, and
A mounting piece 23 is formed on the rear side of the pivot 21 and extends linearly rearward. 24 is an upper surface 26 of the tip portion 25 of the mounting piece 23 of the swing arm 20.
This movable pin 24 is normally held at a lower position. Reference numerals 27 and 27' denote floor panels constituting the vehicle bodies 1 and 1', and these floor panels 27 and 27' are each press-molded into a predetermined shape.
The shape is such that it is held in a non-contact state with the pressing piece 22 of the swing arm 20 during transfer to the floor panel. 27' is base plate 6
When transferring, press the pressing piece 22 of the swinging arm 20,
Further, it has a shape that is held in a non-contact state with the fixed pin 13, and a positioning hole 29 into which the movable pin 24 is fitted and locked is formed at a predetermined portion.

Next, the operating procedure of the device according to the present invention will be explained as follows.

Normally, the swing arm 20 is rotated counterclockwise as shown in FIG. 1, and the movable pin 24 is held in a standby position below. When transporting the vehicle body 1 equipped with the floor panel 27, for example, the base plate 6 held at the lower end of the trolley 2 located in the A process shown in FIG. Then, during the rising process, the car body 1 held on the workpiece installation part is transferred onto the base plate 6, and
In addition, the fixing pin 13 is fitted and locked into the positioning hole 28, and the vehicle body 1 is accurately positioned and held on the base plate 6. At this time, the floor panel 2 of the vehicle body 1
7 has a shape that is held in a non-contact state with the pressing piece 22 of the swinging arm 20, so the swinging arm 20 does not rotate, and therefore the movable pin 24 is placed at a predetermined position below the floor panel 27. It is held on standby at intervals of . When the base plate 6 of the cart 2 is located at the rising end, the carts 2 move forward to the next process all at once.
The vehicle body 1 is sent from process A to process B. When the cart 2 reaches the B process, the bed plate 6 located at the rising end descends, and during the descending process, the car body 1 is held on the workpiece installation part. returns to the original A process.

In addition, a floor panel 2 is installed in the workpiece installation part of process A.
7' is held, A
When the base plate 6 held at the lower end of the trolley 2 located in the process is raised by the operation of the lifting support device 5,
During the rising process, the vehicle body 1' held by the workpiece installation section is transferred onto the base plate 6. Then, as shown in FIG. 2, the pressing piece 22 of the swing arm 20 is pressed by the floor panel 27' of the vehicle body 1'.
The swing arm 20 rotates clockwise about the pivot 21 until it comes into contact with the stopper piece 19 of the support bracket 16. Due to this rotation of the swing arm 20, the movable pin 24 at the tip of the mounting piece 23 protrudes upward, and the positioning hole 24 of the floor panel 27' is
The vehicle body 1' is accurately positioned and held on the base plate 6. At this time, the fixing pin 13 and the floor panel 27' are maintained in a non-contact state.

Although the above embodiment describes the case of positioning the bodies of multiple types of automobiles, the present invention is not limited to this, and can be used to position all types of workpieces of multiple types produced on the same production line. be able to.

Effects of the Invention According to the present invention, each workpiece can be reliably positioned by utilizing the shape differences between a plurality of types of workpieces. Therefore, for example, if multiple types of automobiles are produced on the same production line, if this method is applied to the conveyance system, the vehicle body can be moved onto the bedplate even if the positioning position of the rear of the car body with respect to the bedplate differs depending on the vehicle type. By simply placing the vehicle body on the base plate, the vehicle body can be easily and reliably positioned at a desired position on the base plate, thereby greatly improving work efficiency and making effective use of the installation space.

[Brief explanation of the drawing]

Fig. 1 is a partially cross-sectional explanatory diagram showing an embodiment of the device of the present invention, Fig. 2 is a partially cross-sectional explanatory diagram showing the positioning procedure using the device of the present invention, and Fig. 3 is a schematic diagram of a conveying device to which the device of the present invention is applied. It is an explanatory diagram. 1, 1'... Work (car body), 6... Base plate, 13
...Fixing pin, 16...Support bracket, 20...
... Swing arm, 22 ... Pressing piece, 23 ... Mounting piece, 24 ... Movable pin, 28, 29 ... Positioning hole.

Claims (1)

[Scope of utility model registration request] a base plate on which one of the plurality of types of workpieces is transferred; a fixing pin that is erected and fixed on the base plate;
A swinging arm is pivotably mounted on the base plate via a bracket, and is formed with a mounting piece on both sides of the pivot portion and a pressing piece that is pressed by a workpiece transferred onto the base plate. It consists of a movable pin that is fixed to the tip of the mounting piece of the swing arm and is held in standby at a position deviated from the fixed pin by a predetermined distance below, and is used to compensate for the difference in shape of the workpiece transferred onto the base plate. The positioning device is characterized in that the swinging arm is pressed and swung using the oscillation arm, and either a fixed pin or a movable pin is selectively inserted into and latched into a positioning hole of the workpiece depending on the type of workpiece.