JPS6284932A - Positioning method for parts and the like - Google Patents

Abstract

PURPOSE:To make positioning of semicylindrical parts efficiently by making the parts placed on a jig to be titled in a specified direction so that the parts are placed in a parts placement areas with their arc-shaped portions directed to vertically upward. CONSTITUTION:First an arm 68 is displaced vertically downward to bring semicylindrical surface portion of works W1 and W2 into contact with the top of a work placing table 86 of a jig table 84. the arm 68 is then driven to move a holding device 20 in both vertically upward and X-axis directions so that a work titling means 70 is located between and above the works W1 and W2. When a piston rod 78 is displaced downward, a pressing member 80 comes down to press the works W1 and W2 simultaneously in respective directions X1 and X2. Accordingly, the work W1 is turned by 90 deg. and falls due to its own weight from the work placing table 86 into a first parts placement area 88 and the work W2 similarly falls into a second parts placement area 94, with which the positioning of the works W1 and W2 is made.

Description

[Detailed Description of the Invention] The present invention relates to a method for positioning parts, etc., and more specifically,
For example, the present invention relates to a method for positioning parts, etc., for automatically and easily arranging and positioning semi-cylindrical bearings, etc., so that they can be attached to sliding contact parts such as a connecting rod and a crankshaft, and a crankshaft and a cylinder block, which constitute an engine part.

Generally, inside an engine of an automobile, piston motion that reciprocates at a considerably high speed is converted into rotational motion of a crankshaft via a connecting rod. Therefore, in particular, bearings with excellent wear resistance are fitted to the sliding contact areas between the connecting rod and the crank pin, as well as the journal and the cylinder block. Generally, engines are manufactured that can withstand use over a period of time.

By the way, even in a single engine, quite a large number of bearings as described above are used, so if a worker tries to transfer the bearing or attach it to a connecting rod, etc., the work itself becomes difficult for the worker. The work is extremely burdensome and also quite complicated.

That is, the bearing has a semi-cylindrical shape, and when installing this bearing on a cylinder block, crankshaft, connecting rod, etc., it must be placed on a jig in advance so that it can be easily installed on each sliding contact area. The bearing is arranged with its outer peripheral surface or inner peripheral surface facing upward. Next, the bearing must be inserted into a predetermined sliding contact area using various attachment devices. For this reason, the operator must place the bearings on the jig with each bearing oriented in a predetermined direction.
When done manually, there is no slight improvement in work efficiency.
Moreover, there arises an inconvenience that the above-mentioned work requires a considerable amount of time.

The present invention has been made in order to overcome the above-mentioned disadvantages, and the present invention has been made to take out a desired part from a parts accumulation section that stores a large number of parts such as bearings, place it on a predetermined jig, and then is dropped from the jig using its own weight or an external force acting on the part, and the part is positioned with its outer peripheral surface or inner peripheral surface oriented in a predetermined direction, thereby automatically arranging the part. It is an object of the present invention to provide a method for positioning parts, etc., which can be performed easily and in a short time, more efficiently accomplishes the positioning work of parts, and which is suitable for highly automated line production processes.

In order to achieve the above object, the present invention includes placing at least one or more semi-cylindrical parts on a jig with their axes oriented in the vertical direction, and then tilting the parts in a predetermined direction, The component is characterized in that the component is placed in a component placement section provided in at least one part of the jig, with the arcuate outer circumferential portion or inner circumferential portion of the component oriented vertically upward.

Next, the method for positioning parts, etc. according to the present invention will be described in detail below with reference to the attached drawings, taking the positioning of a bearing member as an example and giving a preferred embodiment in relation to a gripping device that performs the method. .

1 and 2, reference numeral 20 designates a gripping device for carrying out the method of the invention.

In this case, a cylinder 24 is attached to the lower end of a mounting base 22 that constitutes the gripping device 20 and is made of an L-shaped plate. As shown in FIG. 3, pipes 26a and 26b for introducing and discharging fluid at a predetermined pressure are connected to the cylinder 24, and a piston movement door (not shown) extending vertically downward from the cylinder 24 is connected to the cylinder 24. A rack section 28 is provided.

Teeth portions 30a and 30 are provided on both side surfaces of the rack portion 28, respectively.
b is formed.

The hand portion 32 is fixed to the cylinder 24. A rack part 2 extending from the cylinder 24 enters the hand part 32 by a predetermined length, and meshes with the teeth 30a, 30b of the rack part 28, so that the pinions 34 and 36 can rotate freely. Pivotally supported. Further, chuck members 38a and 38b are mounted on the hand portion 32 so as to be horizontally displaceable. A pinion 34 is provided on the upper surface of the chuck members 38a and 38b.
．． The chuck members 38a, 38b have tooth portions 4Qa, 40b that mesh with the chuck members 36, and the lower end portions of the chuck members 38a, 38b are largely cut out to form mounting portions 42a, 42b extending vertically downward. A support plate 44 is fixed to the mounting portion 42a.

The support plate 44 includes a first plate body 46a having an L-shape;
A second plate 46b is formed integrally with one end of the first plate 46a and extends in the horizontal direction. Rods 48a and 48b are fixed to the second plate 46b, extending vertically downward in parallel to both end edges thereof. In this case, the rods 48a and 48b constitute a gripping means 49, and a claw member 50 made of a flexible resin material is attached to the lower end of the rod.
Attach a and 50b.

Then, the first plate body 46a and the mounting portion 42a are fixed via the strike member bolts 52 and the bolts 54a, and the support plate 4
4 to the hand portion 32. In addition, stopper port 5
There is a predetermined distance between the tip of the bolt 2 and the mounting portion 42b, and the stopper bolt 52 is equipped with a spring member 56.

On the other hand, a plate member 58 constituting a gripping means 49 is engaged with the chuck member 38b via pins 54a and 54b. The plate-like member 58 is located between the rods 48a and 48b, and extends vertically downward in parallel with the rods 48a and 48b, and after bending horizontally on the way, it extends further downward. extending in the direction. In this case, the plate member 5
8 and the lower ends of the claw members 50a, 50b are preferably adjusted to the same height position.

Furthermore, the hand portion 32 includes holding members 60a and 60b.
are fixed via pores H2a to 62d (see FIG. 1). Holes 54a and 64b are formed vertically through one end edge of the holding members 60a and 60b, and these holes 5
Rod-shaped stopper members 55a, 66b are fitted into 4a, 64b, and the stopper members 66a, 66b are fixed to the holding members 60a, 60b via set screws 67a, 167b. At that time, the height position of the lower end of the pa members 55a and 66b is adjusted to the plate member 5th and the claw member 50a,
50b so as to be located above it by a predetermined height.

Therefore, the gripping device 20 configured in this manner is attached to the arm 68 of the robot. In this case, the arm 6
The arm 68 is configured to be movable in the three wheel directions of the orthogonal coordinate system, that is, on the X, Y, and Z axes.
A workpiece tilting means 70 is engaged with. The workpiece tilting means 70 includes a mounting plate 72 fixed to the arm 68,
A cylinder 76 is provided on this mounting plate 72 via L-shaped support plates 74a and 74b. In this case, a conical pressing member 80 is fixed to the tip of the piston door 8 extending vertically from the cylinder 76.

Furthermore, as shown in FIG. 5, the workpiece W, that is, the jig 82 for arranging the semi-cylindrical bearing, is composed of a plurality of jig stands 84 connected to each other at a predetermined interval. A workpiece mounting table 86 having a predetermined height is formed at one end of the jig table 84, and a first workpiece placement section 88 is provided at one end of the workpiece mounting table 86.

The first workpiece placement section 88 includes a support stand 90 having the same width as a predetermined portion inside the workpiece W, and the support stand 90.
positioning inclined portions 9 that are integrally formed on both ends of the 0 and inclined outward in the direction of separation from each other;
2a and 92b. On the other hand, a second work placement section 94 is defined by providing a predetermined distance between the other end side of the workpiece mounting table 86 and the jig table 84 adjacent thereto.

In this case, unlike the first work placement section 88, the second work placement section 94 is configured to fit the semi-cylindrical work W in an inverted state without providing a support base. It defines a space slightly larger than the outer periphery.

The gripping device for carrying out the method for positioning parts and the like according to the present invention is basically constructed as described above, and its operation and effects will be explained next.

First, under the driving action of the arm 68, the gripping device 20 is moved to the workpiece accumulating section 9 in which a large number of works W are arranged close to each other.
6 (see Figure 4). Here, the work accumulating section 9
Among the large number of works W arranged in 6, for example, the work W
1 and workpiece W2 are taken out at the same time and then placed on the jig 82 will be described.

That is, if the gripping device 20 is displaced downward in the vertical direction (Z-axis direction) by driving the Arno and Gi3, the plate member 58 is defined by the inner circumferential surface of the workpiece Wl, as shown in FIG. Meanwhile, the claw members 50a and 50b enter the space defined between the work W2 and the work W3. Furthermore, when the gripping device 20 is displaced vertically downward, the stopper members 55a and 66b come into contact with the upper surface of the workpiece W3 and press and support it. Therefore,
After stopping the drive of the arm 68, the cylinder 24 is driven.

As shown in FIG. 3, the pipe line 2 connected to the cylinder 24
When fluid at a predetermined pressure is supplied from the pipe line 26b among the cylinders 6a and 26b, the piston (not shown) fitted in the cylinder 24 is displaced, and the rack portion 28 provided therein is displaced.
is displaced in the direction of arrow X1. Therefore, the rack section 2
Pinions 34 and 36 that mesh with the teeth 30a and 30b of 8
rotates in directions A1 and A2 in the figure, and the pinion 34 rotates in directions A1 and A2 in the figure.
．． The chuck members 38a and 38b that engage with the chuck member 36 are respectively displaced in the directions of arrows X9 and Xz (directions in which they approach each other).

Therefore, the support Fi44 and the plate-like member 58 are displaced so as to approach each other, and the claw members 50a and 50b come into contact with the outer peripheral surface of the workpiece W2, while the plate-like member 58 is moved closer to the workpiece W2.
1 (see Fig. 4).

Next, by driving the cylinder 24 to further displace the rack portion 28 in the force direction of the arrow Z, the workpieces W, , W2 can be held by the claw members 50a, 50b and the plate member 58. In this case, a stopper bolt 52 is screwed onto the chuck member 38a, and the tip of the stopper bolt 52 comes into contact with the inner surface of the mounting portion 42b of the chuck member 38b, so that the claw members 5Qa, 50b The plate member 58 does not press the works W, , W2 more than necessary. Further, the resilient force of the spring member 56 suitably prevents the claw members 5Qa, 50b and the plate-shaped member 58 from rapidly moving closer to each other, thereby preventing the works W, , W2 from falling over or being damaged.

In this way, after the gripping means 49 grips the works Wl and W2 via the hand part 32, the arm 68 is driven to displace the gripping device 20 upward in the vertical direction, and then
The gripping device 20 is disposed above the jig 82 by being displaced by a predetermined distance in the axial or Y-axis direction (see FIG. 5). Therefore, by displacing the arm 68 downward in the vertical direction, the work W
, , one semicircular side surface of W2 is brought into contact with the workpiece mounting table 86 of the jig table 84. When fluid at a predetermined pressure is supplied from the pipe line 26a connected to the cylinder 24, the rank part 28 is displaced in the direction of the arrow X2 in FIG. By rotating in the B2 direction, the chuck members 38a and 38b are displaced in the arrow X2)X1 direction (direction in which they are separated from each other). Eventually, the works W, W2 held by the claw members 50a, 50b and the plate member 58 are placed on the work 81 stand 86.

Next, the arm 68 is driven to displace the gripping device 20 upward in the vertical direction, and the gripping device 20 is also displaced in the X-axis direction, so that the workpiece tilting means 70 is placed above the intermediate portion between the works W and W2. .

Therefore, under the driving action of the cylinder 76, the piston rod 7
8 is displaced vertically downward, the pressing member 80 fixed to the piston door 8 is lowered, and its conical outer circumference pushes the work W and the work W2 in the direction of the arrows X+ and X, respectively.
Press simultaneously in the z direction (see Figure 5). Therefore, the work W.

falls from the workpiece mounting table 86 onto the first workpiece placement section 88 by 90'' due to its own weight, and the outer peripheral surface of the workpiece W1 is directed upward in the vertical direction. As the inclined parts 92a and 92b approach each other, they incline inwardly, and the distance between the inclined parts 92a and 92b is the same as the width of the workpiece W, so that the workpiece that fell on the first workpiece arrangement part 8th W, can be satisfactorily placed on the support stand 90.

On the other hand, the workpiece W2 falls from the workpiece placement section 88 to the second workpiece arrangement section 94 due to its own weight, similar to the workpiece W1, and eventually the workpiece W2 is arranged with its inner peripheral surface facing upward in the vertical direction. be done.

Therefore, the gripping device 20 is transferred to the work stacking section 96 under the driving action of the arm 68, and according to the procedure described above, for example, the works W3 and W4 are gripped and placed on the jig 82.

In this way, the workpiece W is placed and positioned on the jig 82 with its outer peripheral surface or inner peripheral surface facing upward, and the workpiece W is attached to a predetermined sliding portion via various mounting devices (not shown). will be installed on the Then, in the jig 82, a new work W is placed on the jig table 84 from which the work W has been taken out by the gripping device 20. Therefore, the work of arranging and positioning the workpiece W on the jig 82 in a desired orientation can be performed automatically, and the work can be carried out more efficiently and in a shorter time than when it is done manually. .

In this case, the jig 82 has a first work placement section 8.
8 and a second work placement section 94, it is easily possible to use only one of the respective placement sections 88 and 94 depending on the sliding contact portion where the work W is mounted. I hope you understand.

Furthermore, the workpiece W placed on the workpiece mounting table 86 can also be dropped onto the first workpiece placement section 88 or the second workpiece placement section 94 using only its own weight without using the gripping device 20 in particular. For example, the workpiece mounting table 86
If the width of , that is, the separation distance between the workpiece placement parts 88 and 94 is selected to be short, the workpieces W1 and W2 placed on the workpiece mounting table 86 will be separated from each other due to their own weight. On the other hand, the workpiece W2 falls and is placed in the second workpiece placement section 94 in the workpiece placement section 88 .

Furthermore, if the workpiece W is placed on the workpiece mounting table 86 so as to be close to either side of each of the workpiece placement sections 88 and 94, the width of the workpiece mounting table 86 can be shortened as described above. Alternatively, the workpiece W can be placed in any of the workpiece placement parts 88 and 94 via its own weight.

As described above, according to the present invention, a semi-cylindrical bearing is placed on a jig using a gripping device with its semi-circular part facing upward, and then the bearing is held under its own weight or By turning the workpiece upside down and dropping it from the jig using the pressing force of a workpiece tilting means or the like, it is possible to place the bearing with its outer circumferential surface or inner circumferential surface facing upward in the vertical direction. In this way, since the work of placing the bearings on the jig can be done automatically, it is easier than the conventional work where the worker himself orients the bearings in the desired direction and places them on the jig. Advantageously, a quick and efficient bearing placement operation is achieved. Moreover, by automating the conveyance and arrangement of the bearings, it is possible to realize a highly automated line production process within a factory, and it is also possible to achieve the effect of efficiently carrying out mass production.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments. Of course, various improvements and changes in design are possible without departing from the gist of the present invention, such as application to the present invention.

[Brief explanation of drawings]

FIG. 1 is a partially omitted perspective view of a gripping device for carrying out the method for positioning parts, etc. according to the present invention, FIG. 2 is a front view of the gripping device shown in FIG. 1, and FIG. 3 is an operation of the gripping device. FIG. 4 is an explanatory diagram showing the state, FIG. 4 is an explanatory diagram when a workpiece is gripped by the gripping device, and FIG. 5 is an explanatory diagram showing the relationship between the workpiece and the jig. 20...Gripping device 22...Mounting base 2
4...Cylinder 28...Rack part 3
2... Hand portion 34. 36... Binion 38a, 38b... Chuck member 44... Support plate 50a, 50b... Claw member 52... Stopper bolt 58... Plate member 66a, 66b... Stopper member 70... Work (citing means 80... Pressing member 82...
・Jig 84... Jig stand 88. 94... Work placement section 96... Work accumulation section FIo, 2 FIG, 3 Voluntary writing of procedure correction) August 18, 1986

Claims (5)

[Claims] (1) At least one or more semi-cylindrical parts are placed on a jig with their axes oriented vertically, and then the parts are tilted in a predetermined direction, so that the part has an arcuate outer circumference. Alternatively, a method for positioning a component, etc., characterized in that the component is placed in a component placement section provided on at least one side of the jig, with the inner peripheral portion facing upward in the vertical direction. (2) A method for positioning a component such as a semi-cylindrical bearing member in the method according to claim 1. (3) In the method set forth in claim 2, the means for tilting the bearing member in a predetermined direction comprises the own weight of the bearing or an external force that presses the bearing member, and the means for tilting the bearing member in a predetermined direction comprises the own weight of the bearing or an external force that presses the bearing member. A method of positioning parts, etc. by dropping them upside down onto the parts placement section of a jig. (4) In the method described in claim 3, a pair of bearing members are placed on a jig in a state aligned in the same direction, and each bearing member is tilted in opposite directions to arrange the parts. A method for positioning parts, etc., by dropping them on a surface. (5) In the method according to claim 4, a pressing member is introduced into a space defined by a pair of aligned bearing members, and the pressing force of the pressing member is applied to each of the pair of bearing members. A method for positioning parts, etc., by tilting them in the direction of separating them from each other.