JPS643607B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a jig device for setting work parts and guiding them to, for example, an automatic working machine for assembly, processing, etc.

[Technical background of the invention and its problems]

When manufacturing mass-produced products such as assembling engines for two-wheeled vehicles, a large number of jigs are mounted on the conveyor, and the base parts of the product are first set on the jigs.
Other parts are sequentially attached to the base part by means of work robots, work machines, etc. installed along the conveyor. Such a production method is also required when products are diversified and low-volume production of a wide variety is required.

By the way, jig devices used in conventional mass production systems are equipped with a pair of clamp claws and a support that supports the clamp claws on a frame, etc., corresponding to the base part of one model of engine, for example, and the clamp claws are used to hold the workpiece. A device is used in which the locking portion is clamped from the width direction to support the workpiece from both sides. For this reason, such a jig device cannot be used for assembling various types of engines in which the shapes, positions, numbers, etc. of the locking portions are different.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and its purpose is to provide a jig device that can arbitrarily assemble or process products of different shapes and sizes.

[Summary of the invention]

The present invention includes a base, a frame post that is erected facing each other on the base and forms a space between them for mounting a work, and mounting the work on one side of the frame post and between the frame posts. fixed side supports located around the space, movable side supports provided on the other side of the frame post that can move forward and backward with respect to the other frame post, and a cylindrical main body. a slider having a shaft inserted into the movable side support and each fixed side support so as to be movable and retractable; means for movably supporting the main body on each of the movable-side supports and fixed-side supports in a movable manner along the advance/retreat direction of the shaft; A clamp claw on the reference side that protrudes parallel to the direction of the line connecting A clamp claw on the operating side with the tip facing inward that clamps together with the clamp claw on the side, a drive unit that moves the body of each slider, and a drive unit that controls this drive unit to move the body of the slider according to the workpiece to the reference side. By comprising a means for shifting the clamp claw of the
Workpieces such as various parts with different sizes of locking parts such as steps or different widths can always be supported in a horizontal state with one clamp claw as the reference. This is how it was done.

[Embodiments of the invention]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings based on an embodiment of a jig device used for engine assembly. Reference numeral 1 in FIGS. 1 and 2 indicates a conveyor that constitutes an engine assembly line. On this conveyor 1, a large number of jig devices 2 are mounted at regular intervals, and each work robot and work machine are transported by the conveyor 1. The robot is guided to the working position in sequence. The jig device 2 has a base 3 formed into a substantially rectangular shape, and the base 3 is fixed on the conveyor 1. A pair of frame posts 4 are erected facing each other on both sides of the base 3 in the longitudinal direction along the conveyance direction, and bearings 5, 5 (only one is shown) are provided on the upper side of the frame posts 4, respectively. ) is provided. A substantially U-shaped frame 7 having shaft portions 6 (only one shown) at both ends is rotatably supported between these bearings 5, 5, and a central space of this U-shaped frame 7 A workpiece loading section 8 is formed in which an engine base component 27 is mounted. This frame 7 has clamp portions 8a and 8 on the right, center, and left sides, respectively.
b, 8c are provided. These clamp parts 8
Of the clamp portions a, 8b, and 8c, the clamp portion 8c is shown in FIGS. 3 and 4, and the clamp portion 8a is shown in FIGS. 5 and 6.

The structure of the clamp portion 8c includes a support member 9 attached to the inner surface of the frame 7, and a groove portion 10 is provided in the upper surface portion of the support member 9 along the width direction of the frame 7. Further, a screw shaft 11 is attached to the front part of the support member 9 along the width direction of the frame 7.
It is rotatably supported by support parts 12, 12 protruding from the front part of. A head 13 consisting of a bolt head is provided on the head of this screw shaft 11,
Further, a floating nut 14 is provided in the center so as to be able to move forward and backward with respect to the screw shaft 11. Further, a clamp mechanism 15 is provided on the support member 9, and this clamp mechanism 15 has a cylindrical spline shaft 1 disposed within a cylindrical body 17 (corresponding to the main body of the present invention).
A clamp screw shaft 19 passes through these spline shafts 18 and the body 17, and a threaded portion 20 formed on the tip side is attached to the body 17. The spline shaft 18 can be moved forward and backward in the axial direction by screwing into the nut 21 that is attached to the spline shaft 18. A stationary clamp claw 23a is provided on the outer surface of the end of the slide body 17 configured in this manner with the hanger member 22 interposed therebetween, with the tip thereof facing inward. Furthermore, a movable clamp claw 23b is similarly provided protruding from the outer surface of the end portion of the spline shaft 18. The clamp claws are opposed to each other. Further, at the lower part of the body 17, a pair of partition walls 25, 25 are provided, each of which includes a rail portion 24 that engages with the groove portion 10 of the support member 9, and a through hole 25a.

And, the clamp mechanism 1 configured in this way
5 is installed with the rail part 24 attached to the groove part 10 of the support member 9, and the partition walls 25, 25 are arranged close to both sides of the floating nut 14, so that the entire clamping mechanism is fixed to the width of the base 3. It is supported so as to be movable in the direction (perpendicular to the line connecting the frame posts 4, 4 and along the plate surface of the base 3). That is, the floating nut 1 is connected with the supporting member 9 as the fixed support member 28.
4, the clamp claw 23a can be adjusted and moved in the width direction of the locking portion 27a of the engine component 27 mounted on the workpiece filling section 8. Moreover, each clamp claw 23a, 23b is controlled by a slider 16.
Head 26 provided on the head of the clamp screw shaft 19
By rotating the fixed side clamp claw 23a on the body 17 side as the reference side clamp claw and the movable side clamp claw 23b on the spline shaft 18 side as the operating side clamp claw, the movable side clamp claw 23b
can be moved forward and backward relative to the fixed side clamp claw 23a. Thus, the plurality of locking portions 27a having through-holes of various engine base parts 27 housed in the workpiece filling portion 8 are clamped from both sides in the width direction using the opening edges of the through-holes as locking surfaces, The engine base component 27 is supported from the width direction. The movement of the movable clamp claw 23b is performed by a drive machine (not shown) installed on the side of the conveyor 1.
Further, by rotating the head 13, this clamp portion 8c can be attached to the fixed side clamp claw 23, which serves as a reference for clamping, through the screw shaft 11, floating nut 14, partition walls 25, 25, and body 17.
The position of a can be adjusted. In other words, the width direction position adjustment of the stationary side clamp claw 23a with respect to the locking portion 27a of the engine base part 27 is performed using a pulse motor 29 provided with a locking tool 29a provided on the side of the conveyor 1 and releasably locking with the head 13. , a mechanism in which a linear scale 30 for detecting the position of the body 17 of the slider 16 (corresponding to the drive unit of the present invention) is installed, and a control unit 32 consisting of a microcomputer is connected to the pulse motor 29 via a controller 31. is used (corresponding to the means for shifting the clamp claw on the reference side).
Information such as the positions and dimensions of the locking portions 27a of various engine base parts 27 is input in advance to this control unit 32, and based on this information and the detection information of the linear scale 30, the pulse motor 29
The locking tool 29a is locked to the head 13, and by rotating and moving the floating nut 14 relative to the screw shaft 11, the position of the fixed side clamp claw 23a is adjusted according to the width of the locking portion 27a of the various engine base parts 27. It is now possible to match the
In addition, the fixed side clamp claws 23a and the movable side clamp claws 23b are both formed into a tapered tip, so that the tapered portion 33 can reliably fit any diameter of the through hole 52 of the locking portion 27a. It is designed so that it can be locked. In FIG. 3, 34 is a spline guide provided on the body 17 of the slider 16, and 35 is a rotation stopper thereof.

Regarding the clamp part 8b provided at the center of the frame 7, the same structure as the above-mentioned clamp part 8c is used, so the same reference numerals are given to the same components as the clamp part 8c, and the explanation thereof will be omitted.

The clamp claws 23a, 23b of this clamp portion 8b and the above-mentioned clamp portion 8c are arranged in parallel in the direction of the line connecting the frame posts 4, 4.

Next, the clamp portion 8a provided on the left side of the frame 7 will be explained. Figure 5 and 3 in Figure 6
6 is the same slider as the slider mechanism of the clamp part 8c mentioned above. Therefore, this slider 3
6, the same parts as those of the above-mentioned clamp part 8c are given the same reference numerals, and the explanation thereof will be omitted.
A hanger member 22 is attached to both sides of the slider 36, and a fixed side clamp claw 23a and a movable side clamp retainer 23b are provided at both ends of the hanger member 22, respectively. It forms the side clamp claw.
Reference numeral 37 denotes a support member attached to the frame 7. A groove 38 facing the clamp portion 8c is cut into the upper surface of the support member 37, and a slide member 39 is slidably inserted into the groove 38. , serves as a movable support body 40 that can move forward and backward with respect to the clamp portion 8c. And this movable support 4
The slider 3 is placed on the tip of the slide member 39 of 0.
The center part of the body 17 of No. 6 is attached in a direction perpendicular to the sliding direction of the movable side support 40, and cooperates with the above-mentioned movable side and fixed side clamp claws 23a and 23b to clamp the engine base part 27 from both sides. They are now able to support each other. That is, in order to position and adjust the movable side support body 40 for supporting this engine base part 27, a locking rod 41 that extends slidably through the support member 37 is provided at the lower part of the slide member 39, and the conveyor 1
The position of the drive unit 43 and the slide member 39, in which a locking member 42a that removably locks with the locking rod 41 is connected to the output shaft of the pulse motor 42 by screw fitting, is located on the side of the locking rod 41. Linear scale 44 to detect
The above-mentioned control unit 32 is configured with a microcomputer that connects the pulse motor 42 and the linear scale 44 via a controller 45.
A mechanism is used to connect to the Then, based on the information such as the position and dimensions of the locking portions 27a of various engine base parts 27 inputted in advance to this control unit 32, and the detection information of the linear scale 44, the locking member 42a is attached to the locking rod 41. Lock it and
The locking rod 41 is slid and driven to lock the locking portions 27a of the various engine base parts 27...each clamp claw 23a, 23b of each clamp portion 8b, 8c according to the position.
Each clamp claw 23 of the movable support 40
Adjust the positions of a and 23b. Therefore, the forward and backward movements of the movable support 40 and the respective clamp portions 8a,
By moving the movable clamp claw 23b forward and backward relative to the fixed clamp claw 23a of 8b and 8c and adjusting the reference position of the fixed clamp claw 23a, the pitch distance and width of the different locking parts 27a of various engine base parts 27 can be adjusted. Various kinds of engine base parts 27 can be suspended and supported in the workpiece filling section 8 in a desired horizontal position depending on the size and the like. In this suspension support, a plurality of fixed-side clamp claws 23a, movable-side clamp claws 23b, and respective supports 28, 40 are arranged at different positions around the engine base component 27 housed in the workpiece filling section 8. It is also important that

Regarding the frame posts 4, 4, the frame post 4 located on the left side is provided with a rotation mechanism 47 for manually rotating and displacing the frame 7, as shown in FIG. This rotation mechanism 47 is provided with a disk-shaped allocation plate 48 having locking holes (not shown) bored at different positions, for example, 90 degrees, on the frame 7 side, and by rotating an operating lever 49, the allocation plate 48 is A locking pin 50 that locks into the locking hole of
By locking and unlocking by fitting the locking pin 50 into the locking hole, the frame 7 can be rotated in 90° increments within a range of 180° with the shaft portions 6, 6 as rotation centers. I am now able to do this. Further, this rotating mechanism 47 is provided with a gear 51 on the frame 7 so that it can also be rotated by an automatic machine (not shown). Note that 53 is a spring member for returning the operating lever.

Note that the clamp parts 8a, 8b, 8c are connected to the control part 3.
The engine base parts 27 are simultaneously operated in response to commands from the engine base parts 27.

Next, the operation of the jig device 2 configured as described above will be explained.

First, a case will be described in which the engine base part 27 is attached, which is provided with two locking portions 27a, 27a having the same shape and the same locking width on both sides in the longitudinal direction as indicated by two-dot dashed lines in FIG. First, using a transfer machine (not shown), the engine base component 27 is placed in the workpiece loading section 8 with the locking portions 27a, 27a facing the left and right clamp portions 8a, 8c. Then, based on a command from the control section 32, the fixed side clamp claw 23a of the right side clamp section 8c is moved to the locking section 2.
7a, and then the movable side clamp claw 23b
to clamp the locking portion 27a from the width direction. At the same time, the movable side support body 40 is moved forward by the drive of the pulse motor 42 in response to a command from the control unit 32, and the fixed side clamp claw 23a and the movable side clamp claw 23b on the upper stage of the clamp part 8a are positioned at the left locking part 27a. Then, the left locking portion 27a is clamped from the width direction by the upper fixed side clamp claw 23a and the movable side clamp claw 23b. In this way, the engine base part 27 is horizontally suspended and supported from both sides and is mounted on the jig device 2 as desired.

In addition, as shown by the broken lines in FIG. 2, in order to install a different type of small-sized engine base component 27 having two locking portions 27a, 27a having the same shape and the same width in the vertical direction, first transfer At the machine, each locking part 27 of the engine base part 27
a, 27a to each clamp part 8a, clamp part 8b
Place it towards. Then, based on a command from the control section 32, one of the locking sections 27a is locked and clamped by the fixed side clamp claw 23a and the movable side clamp claw 23b of the right side clamp section 8b. At the same time, based on a command from the control unit 32, the movable side support body 40 is driven by the pulse motor 42 to move forward with respect to the clamp part 8b, and the fixed side clamp claw 23a and the movable side clamp claw 23b on the lower stage side of the clamp part 8a are moved forward. is aligned with the locking part 27a on the left side, and by locking and clamping the other locking part 27a with each of the lower stationary clamp claws 23a and movable clamp claw 23b, a small locking part can be formed. 27a,
The engine base parts 27 having different pitches 27a can be horizontally suspended and supported from both sides and attached to the jig device 2.

In addition, as shown in FIGS. 7a and 7b, the locking portion 27a has so-called steps having different widths and lengths l at three different points, and through holes 52 are formed in the locking portions 27a and 27a. When attaching the engine base part 27 having a different shape having a different diameter d, first the engine base part 27 is placed between the clamp part 8a and the clamp part 8c using a moving machine (not shown).
Next, based on a command from the control unit 32, the fixed side clamp claw 23a and the movable side clamp claw 23b of the right side clamp part 8c lock the right side locking part 27a. Since there is a step, first move the stationary side clamp claw 23a by the step using the pulse motor 29 via the floating nut 14 so that the fixed side clamp claw 23a is locked on one of the locking sides of the locking portion 27a. Shift the reference position. Then, fixed side clamp claw 2
3a and the movable side clamp claw 23b, the locking part 2
7a and clamp it. At the same time, based on a command from the control section 32, the movable support 40 is driven by the pulse motor 42 to move forward relative to the clamp section 8c, for example, the fixed clamp claw 23a and the movable clamp claw 23b on the upper stage of the clamp section 8a. is aligned with the left locking part 27a, and the fixed side clamp claw 23a and the movable side clamp claw 23b are used to lock the left side locking part, and by clamping, the position and position of the locking part 27a can be adjusted with the irregular shape. Engine base components 27 having different widths can also be horizontally suspended and supported. It goes without saying that the position of the fixed clamp claw 23a of the clamp portion 8c is adjusted using the fixed clamp claw 23a of the movable support 40 as a reference. Furthermore, the difference in diameter d of the locking portions 27a is such that the distal end portions of the stationary side clamp claws 23a and the movable side clamp claws 23b form tapered portions 33, so that they can be clamped as desired.

Thus, the widths of the locking portions 27a are different from each other.
Even if the engine base part 27 has locking portions 27a that are stepped from each other, it is possible to precisely support the engine base part 27 in a horizontal state by adjusting the reference position, without causing the engine base part 27 to be inadvertently tilted diagonally or otherwise misaligned. This makes it easy and simple to assemble many different types of engines. Moreover, the horizontal support is provided by the movable clamp claw 23 with respect to the fixed clamp claw 23a.
Since b moves forward and backward to determine the position, accurate support for work robots, work machines, etc. can be obtained.

Furthermore, by shifting the reference positions of the plurality of fixed-side clamp claws 23a, 23a, which serve as the reference side, even when holding the engine base part 27 using both the clamp parts 8b, 8c, the engine base part 27 can be held. Even when the widths of the locking portions 27a of the component 27 are different, as long as the reference position is shifted according to the width of the locking portions 27a, both fixed sides can be used to force the locking portions 27a into the specified position. Can be clamped without applying force.

In the above-described embodiment, a jig device used for assembling an engine was taken as an example, but the present invention is not limited to this and can be applied to assembling and processing other parts.

〔Effect of the invention〕

As explained above, according to the present invention, by adjusting the clamp reference point, even if the widths of the locking portions are the same, or the locking portions have different locking portions with different steps. Workpieces can now be supported in a horizontal position with one clamp claw as a reference, and work robots,
It is possible to mount a workpiece that is suitable for a working machine, etc. without shifting its position. Moreover, since the reference position of both clamp claws on the reference side can be shifted, even if the width of the locking part is different when clamping a workpiece with both,
As long as the reference position is shifted in accordance with the different widths of the locking portions, the workpiece can be clamped at a predetermined position without applying excessive force.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of the jig device, Fig. 2 is a side view of the jig device, and Fig. 3 shows the structure of the fixed side support and the structure around the clamp claw. 4 is a side view, FIG. 5 is a sectional view showing the structure of the movable support and the structure around the clamp claw, FIG. 6 is a side view, and FIGS. 7a and 7b are views showing the workpiece. FIG. 2 is a plan view and a side view. 23a... fixed side clamp claw, 23b... movable side clamp claw, 27... engine base part (work), 27a... locking part, 28... fixed side support body,
40...Movable side support.

Claims (1)

[Claims] 1 A base, a frame post that is erected opposite to the base and forms a space between them for mounting a workpiece, and a space between one side of the frame post and between the frame posts for mounting the workpiece. fixed-side supports provided on the periphery; a movable-side support provided on the other side of the frame post that can move forward and backward relative to the other frame post; and a movable side support that can move forward and backward into the cylindrical main body. A slider having a shaft inserted therein and arranged along the base and perpendicular to a line connecting the frame posts to the movable side support and each fixed side support; and a main body of the slider, respectively. Means for supporting each of the movable side supports and fixed side supports so as to be movable along the forward and backward direction of the shaft, and a line on the outer surface of each main body of the slider, the tip thereof facing inward, and connecting the frame posts. Clamp claws on the reference side are provided on the axis of the slider opposite to the clamp claws on the reference side, and the workpiece is clamped on the reference side by moving the slider back and forth. A clamp claw on the operating side with the tip facing inward that clamps together with the claw, a drive unit that moves the body of each slider, and a clamp claw on the reference side that controls this drive unit and moves the body of the slider according to the workpiece. A jig device characterized by comprising means for shifting.