JPH0151297B2 - - 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, in the jig device used in the conventional mass production method, for example, a pair of clamp claws and a support for supporting the clamp claws are provided on a frame or the like, and the clamp claws are attached to the base part of one model of engine. A device is used in which the locking portion of the workpiece is clamped from the width direction so that the workpiece is supported 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.

[Object of the Invention] This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a jig device that can arbitrarily process or process a wide variety of products with different shapes and sizes. It is something to do.

[Summary of the invention]

This invention consists of a base, a frame post that is erected facing each other on the base and forms a space between them for mounting a workpiece, and a U-shaped frame post that is rotatably supported between the frame posts. a frame, a fixed support provided at one end of the frame, and a movable support movable relative to the fixed support provided at the other end of the frame; a pair of first clamp claws that are supported by the fixed support and clamp the work; and a pair of first clamp claws that are supported by the movable support and clamp the work with reference to the fixed support and support it in the space. a second clamp claw, and a locking plate provided on a shaft portion that rotatably supports the frame and having a plurality of locking portions provided on a plate surface around the shaft portion;
A locking pin is provided on the frame post corresponding to the locking plate and locks with the locking portion corresponding to a position where the center of gravity of the workpiece supported in the space part stably stops to fix the frame. By configuring a jig device by providing a jig device, it is possible to support a variety of parts having different shapes and positions of locking portions based on the clamp claws of the stationary support body.

[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 configured to mount an engine base part 27 on the engine base part 27. 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 slider 16 in which a cylindrical spline shaft 18 is fitted into a cylindrical body 17 so as to be able to move forward and backward. 18
A clamping screw shaft 19 passes through the body 17, and a threaded portion 20 formed at its tip engages with a nut 21 attached to the body 17 to move the spline shaft 18 back and forth in its axial direction. It is now possible to do so. Clamp claws 23a, 23b are mounted on both ends of the slider 16 configured in this manner via hanger members 22, 22.
(corresponding to the first clamp claws) are protrudingly provided to face 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, respectively, and the clamp claws 23a, 23b are moved. supported as possible. That is, the support member 9 and the body 17 of the slider 16 are connected to the fixed side support 2.
8, the clamp claw 23a can be adjusted and moved in the width direction of the locking portion 27a of the engine base component 27 mounted on the workpiece loading portion 8 via the floating nut 14. Further, each clamp claw 23a, 23b is rotated by the slider 16 to rotate a head 26 provided on the head of the clamping screw shaft 19.
3a is a fixed side clamp claw, the spline shaft 18 side clamp claw 23b is a movable side clamp claw, and the movable side clamp claw 23b is a fixed side clamp claw 23a.
It is designed to be able to move forward and backward. Thus, the plurality of locking portions 27a having through-holes of various engine base parts 27 housed in the workpiece loading section 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. In addition, this clamp portion 8c
By rotating the head 13, the screw shaft 11, floating nut 14, partition walls 25, 2
5. Through the body 17, it is possible to adjust the position of the fixed side clamp claw 23a, which serves as a reference during clamping. That is, 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 provided with a locking tool 29a on the side of the conveyor 1, which locks the head 13 in a detachable manner. 29, slider 16
linear scale 3 that detects the position of the body 17 of
A mechanism is used in which a control section 32 composed of a microcomputer is connected to a pulse motor 29 via a controller 31.
Information such as the positions and dimensions of the locking parts 27a of various engine base parts 27 of the control unit 32 is input in advance, 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, rotated, and the floating nut 14 is moved relative to the screw shaft 11, so that the position of the fixed side clamp claw 23a is adjusted to the width of the locking portion 27a of the various engine base parts 27. It is now possible to adjust it accordingly. Further, each fixed side clamp claw 23a and movable side clamp claw 23b are both formed into a tapered tip, and the through hole 52 of any locking portion 27a is formed into a tapered shape.
The tapered portion 33 can be reliably locked even with a diameter of . 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.

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 clamp claws 23a and 23b (corresponding to second clamp claws) are attached to both ends of the hanger member 22.
are provided in a protruding manner, forming a pair of fixed side clamp claws 23a, 23a and movable side clamp claws 2, respectively.
3b and 23b. 37 is frame 7
A groove 38 facing the clamp part 8c is carved in the upper surface of the support member 37, and a slide member 39 is slidably inserted into the groove 38, and the support member 37 is attached to the clamp part 8c. It serves as a movable support body 40 that can move forward and backward with respect to 8c. The body 17 of the slider 36 is disposed on the tip of the slide member 39 of the movable support 40.
The central part of the movable side support body 40 is attached in a direction perpendicular to the sliding direction of the movable side support body 40, and supports the engine base part 27 from both sides in cooperation with the above-mentioned movable side and fixed side clamp claws 23a and 23b. It is becoming possible to do this. 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 A locking member 42 that removably locks with the locking rod 41 is disposed on the side of the locking rod 41.
A drive unit 43 which is connected to the output shaft of a pulse motor 42 by screw fitting, and a linear scale 44 that detects the position of the slide member 39 are installed respectively, and these pulse motor 42 and linear scale 44 are controlled by a controller 45. A mechanism is used that connects to the above-mentioned control section 32 configured with a microcomputer via a microcomputer. 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. By locking and sliding the locking rod 41, the locking portions 27a of various engine base parts 27 are attached to each clamp portion 8b, 8 according to the position.
The position of each clamp claw 23a, 23b of the movable support body 40 is adjusted with respect to each clamp claw 23a, 23b of c. Therefore, the movement of the movable side support body 40 and the movement of the movable side clamp claw 2 with respect to the fixed side clamp claw 23a of each clamp portion 8a, 8b, 8c.
3b and the reference position adjustment of the stationary side clamp claw 23a, various types of engine base parts 27 can be adjusted according to pitch distances, widths, etc. of different locking parts 27a of various engine base parts 27. It can be suspended and supported within the workpiece loading section 8 in the desired horizontal position. 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 parts 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 has locking holes (corresponding to locking portions, not shown) located at different positions, for example, 90 degrees on the frame 7 side.
A locking pin 50 is provided with a disk-shaped allocation plate 48 (corresponding to a locking plate) having a hole therein, and locks into the locking hole of the allocation plate 48 by rotating an operating lever 49.
By locking and unlocking by fitting the locking pin 50 into the locking hole, the frame 7 can be rotated about the shaft parts 6, 6, for example.
It can be rotated in 90° increments within a 180° range. In addition, this rotation mechanism 47
A gear 51 is provided 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 component 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 indicated by two-dot chain 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. The engine component 27 is thus horizontally suspended from both sides and mounted on the jig device 2 as desired. After this, the operating lever 49 is pulled toward the user to make the frame 7 freely rotatable and to hold the engine base component 27 in a stable state. Specifically, when the frame 7 becomes rotatable, the frame 7
However, along with the engine base component 27, rotational displacement occurs around the shaft portion 6 as a fulcrum due to the deviation of the weight (center of gravity) of the engine base component 27. Thereafter, the operating lever 49 is returned and the locking pin 50 is locked in the locking hole of the allocation plate 48 corresponding to the position where the engine base component 27 has stably stopped.

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 pitches 27a horizontally suspend and support engine base parts 27 of different types from both sides and are attached to the jig device 2. Then, as in the previous case, by operating the operating lever 49, the engine base component 27 is held in a stable state.

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 an engine base part 27 having an irregular 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 transfer 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. To position. Then, the locking portion 27a is locked and clamped by the fixed side clamp claw 23a and the movable side clamp claw 23b. At the same time, based on a command from the control unit 32, the movable support 40 is moved by the pulse motor 42.
For example, the fixed side clamp claw 23a and the movable side clamp claw 23b on the upper stage side of the clamp part 8a are moved forward relative to the clamp part 8c by the driving of
a. By locking and clamping the left side locking part with the movable side clamp claw 23b, it is possible to horizontally suspend and support engine base parts 27 which are irregularly shaped and have different positions and widths of the locking part 27a. can. Of course, the engine base component 27 is held in a stable state by operating the operating lever 49. In addition, the fixed side clamp claw 2 of the clamp part 8c
Needless to say, the position of the movable support member 40 is adjusted using the fixed clamp claw 23a of the movable support member 40 as a reference. Further, the difference in diameter d of the locking portions 27a is such that the tip portions of the stationary side clamp claws 23a and the movable side clamp claws 23b are tapered portions 33, so that they can be clamped as desired.

In this way, the support body disposed on the side of the engine base component 27 is replaced by the fixed side support body 2 that is disposed in a fixed manner.
8 and a movable side support 40 that is arranged to be movable forward and backward with respect to the fixed side support 28, it is possible to use various types of engine base parts 27 having locking portions 27a in different positions and shapes. It can be clamped (supported) as desired, and can be easily and easily adapted to assembling various types of engines. Moreover, since the movable support 40 advances and retreats to determine its position with respect to the fixed support 28, it is possible to perform accurate and desired setting for work robots, work machines, and the like. Furthermore, since the rotatable frame 7 is used to hold the engine base part 27 with the center of gravity at a stable position, the engine base part 27 can be held in a stable state no matter what shape or size it is. There are also advantages to being able to do so.

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, the support distance can be changed depending on the position, shape, etc. of the locking part of a workpiece such as a component, and workpieces having different locking part mounting pitches can be changed at any time. can be supported. Furthermore, since the movable support body moves forward and backward with respect to the fixed support body, various types of workpieces can be attached with high precision as desired. By using a rotatable frame and a means of fixing the frame at an angle, the center of gravity is held at a stable position, allowing workpieces of any shape or size to be held in a stable state. be able to.

[Brief explanation of drawings]

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, 23b... fixed side clamp claw, movable side clamp claw (clamp claw), 27... engine base part (work), 27a... locking part, 28...
Fixed side support body, 40... Movable side support body, 48...
Allocation plate (locking plate), 50...locking pin.

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 U-shaped frame rotatably supported between the frame posts; A fixed side support provided on one end of the frame, a movable support that can move forward and backward with respect to the fixed support provided on the other end of the frame, and a movable side support provided on the other end of the frame. a pair of first clamp claws that are supported by the support and clamp the work; and a pair of second clamp claws that are supported by the movable support and clamp the work with reference to the fixed support and support it in the space. a clamp claw, a locking plate provided on a shaft portion that rotatably supports the frame and having a plurality of locking portions around the shaft portion on a plate surface; Correspondingly, a locking pin is provided on the frame post and locks with the locking portion corresponding to a position where the center of gravity of the workpiece supported in the space part stably stops, thereby fixing the frame. Characteristic jig device.