JPH02284827A - Pallet for assembly performing assembly of plural kinds of works - Google Patents

Abstract

PURPOSE:To reduce the space of a jig with the reduction of the number of pallets and to reduce the loss time in arrangement at the grade switching time by performing by a robot hand the transfer of the work placed on a pallet and the movement arrangement of a jig in the automatic assembly line of a multi-kind less production. CONSTITUTION:Jigs A1..., B1..., C1... placed on a pallet P are arranged in a constant direction at a constant position in advance by insertion holes a1..., b1..., c1... and positioning pins a11..., b11..., c11... and can be moved to the other regulated constant position from the constant position easily by the operation of a robot hand. When a work is transferred onto an assembly line, a jig conformed to the work is arranged to the constant position located on the pallet P with the operation of the hand and fixed by the jig to perform the assembly of a part. Also when a work is arranged to the constant position located on the pallet P with the operation of the hand and fixed by the jig to perform the assembly of a part. Also when a work of other kind is transferred, the present jig is returned to the original position, a new jig is arranged on the pallet by the hand as well and the assembly is similarly performed, so one pallet will manage and also the need for the rearrangement and so on of a jig by the line stoppage is not required at all.

Description

[Detailed description of the invention] [Object of the invention] (Industrial application field) The present invention relates to an assembly tool in an assembly line,
It is used in automatic assembly lines using pallet transport.

(Prior art) As a prior art related to the present invention, Japanese Patent Application Laid-Open No. 63-64446
There is a public notice of issue.

This is a pallet changing device that replaces the pallet, which is the base of the assembly, when changing the product to be assembled on the pallet on the assembly line.

(Problem to be Solved by the Invention) However, in the assembly line for high-mix, low-volume production, the pallet changing device requires a number of parts equal to the number of product types multiplied by the number of assembly steps. However, there is a problem in that a large space is required to stock the pallets.

The technical problem of the present invention is to minimize the number of pallets in an automatic assembly line for high-mix, low-volume production, to reduce the space for jigs and tools, and to reduce setup loss time when changing products. It is.

(Structure of the invention) (Means for solving the problem) The technical means taken to solve the problem are as follows. That is, when assembling parts on a pallet on an assembly line, on an assembly pallet on which jigs for positioning the workpieces are arranged, a robot moves jigs corresponding to multiple types of workpieces onto the pallet. The parts are assembled by taking out the workpiece freely with the hand and placing it in a fixed position, and placing the jig that should hold the workpiece in the fixed position.If another type of workpiece is transported, the corresponding This is an assembly barrette 1- in which a jig is moved to a fixed position on a pallet to assemble parts, and a robot hand is used to transport the workpiece on the pallet and move and arrange the jig.

(Function) All jigs on the pallet are arranged in fixed positions and fixed directions using insertion holes and positioning pins, so they can be easily moved from one fixed position to another specified fixed position by operating the robot hand. It is something that can be moved.

When multiple types of workpieces are transported on the assembly line, the hand operates based on the information, places a jig that matches the workpiece in a fixed position on the pallet, and fixes the workpiece with the jig. The parts are assembled using the same method.

If another type of work is to be transported, the current jig is returned to its original position based on that information, and
A new jig is placed on a pallet by hand and assembled in the same manner as above, so only one pallet is required and there is no need to change jig setups due to line stoppages. be.

(Example) Examples will be described below.

P in Fig. 1 is a pallet to be transported on the assembly line, and there are a pair of holes and positioning pins on the flat plate 1, al, B2...B4 and bl+'b2... on both sides of the flat plate 1. B4 is arranged in a straight line, and further C,, C2...C4 are arranged in the center.
are arranged in a square shape, and similarly pin aaz+”I
I, bll+ bz+++, C+++ C
There is z+...

Separate jigs A,,A,...,B,,B2 (second
(as shown in the figure), and in that case, the positioning pins that also serve as a rotation stopper for the jig are all+1□...+ bll
, b2+...CII, Cal...

FIG. 2 shows a state in which the workpieces WI to be assembled are set on the pallet P, and the jigs used are A2°A4. B
z, B a is used.

Hole "l+aZ...B" on the flat plate which is the pallet in Figure 1
4 are arranged with jigs A, A2...A4 having holes into which shafts and positioning pins are inserted, and jigs A, A2...A4 of other shapes are arranged in BUNJINSU, b,...B4. Jig B+, Bz...
・B4 is placed.

Next, as shown in FIG. 3, the jig A4 has a support 1 for holding and fixing the arcuate side surface of the workpiece WI, and this supporter 1 has an arcuate portion 2 that matches the arc of the workpiece W1. There is a hole A4I into which all positioning pins can be inserted.

FIG. 4 shows a situation in which a square workpiece W2 is held and fixed on the pallet I-P using jigs A, A.

B,,B4 are used.

Figure 5 shows the situation in which the workpiece W2 is held by the jig A3, and the linear side surface of the workpiece W2 is
It is held and fixed at the linear side surface 3 of A 3
1 is a hole into which the positioning pin C21 is inserted.

To explain the operation of the above structure, (1) jigs A, A2, . . ., B, B2 are arranged on the pallet P.

(2) When the work W to be assembled is transported, the robot hand catches this information and sets the jig At, 7!
t, 4. B2. B 3 is placed from the regular position to the regular position of C, C2, . . .

(3) Next, the workpiece W1 is placed and held on a pallet with a hand, and the workpiece X+ (indicated by a dashed line in FIG. 2) to be assembled is transported and assembled, and the combined workpiece Wl
and move Xl to another location.

(4) When the workpiece W1 is transported next, the jig Δz
, A4. B2. B: Continue with the work.

(5) When another workpiece W2 is transported, if there is support, the hand moves to A of the jig 2. A a, B 2.
While returning B 3 to its regular position, remove the other jigs on the pallet,
A1゜A3. B +, B 4 in fixed position C,,C,・
...Move it to C4 and fix it.

(6) Transfer the transported workpiece W2 to the jig AA3. B
+, B4 is held and fixed, the workpieces X2 to be combined are transported, and after the combination is completed, the workpieces are transported to another location.

The above operations are repeated.

In this way, multiple types of jigs are held in place on a flat pallet using holes and pins, and when multiple workpieces are being transported, matching jigs are placed on the pallet and held in place. It is to be firmly fixed and assembled. Even if there are a plurality of types of workpieces or more, if a plurality of corresponding jigs are arranged on the pallet, it is possible to smoothly assemble the plurality or more types of workpieces on a flat pallet.

[Effects of the Invention] The present invention has the following effects. That is, (1) different types of products can be handled by replacing jigs on the pallet, so there is no need for a replacement pallet.

(2) This can be achieved by simply manufacturing a jig compatible with the new product.

(3) In an automatic assembly line, by providing a jig exchange process every time, product types can be changed without stopping the line.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a pallet in an embodiment of the present invention,
Figure 2 is an explanatory diagram of the pallet for assembling workpiece W, Figure 3
The figure is an explanatory diagram of jig A4, Fig. 4 is an explanatory diagram of a pallet for assembling workpiece W2, and Fig. 5 is an explanatory diagram of jig A3. ...Insertion hole. C+, Cz... A 1. A z..., B,, B2...Jig W,
,W,,X,,Xz・--Work. ■... Jig prop 2 1.3... Side part of the prop. Figure 13 No. 52

Claims (1)

[Claims] When assembling parts on a pallet on an assembly line, on an assembly pallet on which jigs for positioning workpieces and workpieces are arranged, jigs corresponding to multiple types of workpieces are attached to the robot hand on the pallet. The parts are assembled by placing the jig that should hold the workpiece in the fixed position, and if another type of workpiece is transported, the jig in charge of it is assembled. An assembly pallet for assembling multiple types of workpieces, in which parts are assembled by moving the workpieces to fixed positions on the pallet, and a robot hand transports the workpieces on the pallet and moves and arranges the jigs.