JPH0232353Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a leg attachment device for a bottom plate, and particularly to a leg attachment device for a bottom plate that holds the bottom plate facing downward and attaches legs from above.

[Background technology] In the process of assembling equipment such as audio equipment, communication equipment, and measuring equipment, the work of attaching resin/rubber legs to the bottom plate of the housing is often done manually. However, the work was time consuming and required manpower, making it inefficient.

For this reason, in recent years, automatic machines specifically for attaching legs have been installed within assembly lines in an effort to streamline and streamline the work. The bottom plate with the legs attached is transferred by this automatic machine to an assembly conveyor, and electronic components are sequentially assembled in the following steps.

By the way, conventional automatic machines are designed to hold the bottom plate facing downward (inside out) and attach the legs from above, and the bottom plate transferred from the automatic leg attaching machine to the pallet of the assembly conveyor faces downward. Therefore, in the next process (next station) on the assembly line, it is necessary to use a special machine to invert the bottom plate before assembling the electronic components, which has the disadvantage of occupying an extra station on the assembly line. Ta.

[Purpose of the invention] Taking the above facts into consideration, the present invention enables the bottom plate after the legs are attached to be transferred to the outside of a conveyor device, etc. in an upward position, thereby reducing the area occupied on the assembly line and making it possible to use it offline. It is an object of the present invention to provide a leg attachment device for a bottom plate that does not require the effort of reversing the bottom plate when used.

[Structure of the invention] The bottom plate leg attachment device according to the present invention has a bottom plate supply device that supplies the bottom plate facing downward, a leg supply device that supplies the legs, and a work station that performs the leg attachment work, and A leg mounting device main body that is extendable and has a first hand that takes out the bottom plate facing downward from the feeding device and positions it on the workstation, and a second hand that takes out the leg from the leg feeding device and attaches it to the bottom plate on the workstation. and a transfer and reversing device that uses a suction section provided at the tip of the arm to invert the bottom plate after attaching the legs from the work station and transfer it to the outside. The work station where the work is carried out is directly transferred to an external conveyor device or the like with the bottom plate facing upward using a transfer and reversing device.

[Embodiment of the invention] FIGS. 1 to 3 show an embodiment of the bottom plate leg attachment device according to the present invention. Device"
10 is installed close to the starting end position of the conveyor device 12 for assembly. The leg mounting device 10 and conveyor device 12 are installed on the floor 14. The leg mounting device 10 includes a chassis alignment device 16 as a bottom plate supply device installed on the left side of FIG. It is composed of a leg attachment device body 20 installed between the devices 18 and a transfer/reversal device 22 installed between the leg attachment device body 20 and the conveyor device 12.

The sheath aligning device 16 includes two sets of front and rear sheath aligning sections 24, and each aligning section 24 has a plurality of steel chassis 26 aligned downward and placed on a lifter (see FIG. 2) 28. It is locked in steps. The chassis alignment device 16 is configured to be able to vary the locking position of the lifter 28 according to the chassis width, and the chassis size can be changed within a set range. The chassis 26 is raised one step at a time as the leg plate attachment work progresses, and is taken out from the position at the top of the lifter 28 to the leg attachment device main body 20 (see arrow A in FIG. 2). ) The leg supply device 18 is provided on the table 30 and feeds the legs 3 provided at the rear end of the table 30.
2. A first ball feeder 34 for alignment, and a second push rivet 36 for alignment provided in the center.
The table 30 includes a ball feeder 38 and an index table 40 provided at the front end of the table 30. The second ball feeder 38 is installed one step higher than the first ball feeder 34, and the chute 4 runs from the outlet of the first and second ball feeders 34, 38 to the index table 40 in front.
2.44 have been extended.

At the tip of the upper chute 42, as shown in the upper part of FIG. 4, there is a catch arm 4 that can freely rotate downward.
6 are connected. First ball feeder 38
The push rivet 36, which is transported with its neck suspended through a chute 42, is finally suspended by a catch arm 46. The push rivet 36 is split into legs to facilitate caulking to the chassis 26. On the other hand, the tip of the lower chute 44 is connected to the index table 40 as shown in the lower part of FIG. It is designed to be gripped in sequence by a plurality of leg receivers 48 that are equally divided.

A rivet insertion cylinder 50 is disposed above the catch arm 46 and is moved up and down using compressed air.The rivet insertion cylinder 50 is lowered while drawing a vacuum inside the hollow piston 52, and the push rivet 36 suspended by the catch arm 46 is inserted into the piston by a vacuum action. 52, and then inserted into the leg hole 54 of the leg 32 held by the index table 40 (see arrow J' in FIGS. 5 and 2). At this time, the head of the push rivet 36 comes into contact with the stepped portion of the leg hole 54, and the tip protrudes from the leg 32 to the outside.
To complete the insertion of the push rivet 36 into the leg 32,
Confirmation switch 56 provided at the lower end of the leg holder 48
The piston 52 is vacuum-stopped and raised, and the index table 40 is rotated by one division. (Arrow K′ in Figure 2,
(see L′). The catch arm 46 returns as the piston 52 rises.

As shown in FIGS. 6 and 7, a leg supply pusher 58 that moves up and down is installed on the lower side of the index table 40 at the periphery of the leg mounting device main body 20. leg 3
2 is positioned, it is extracted upward from the leg receiving portion 48 and supplied to the leg attachment device main body 20.

The leg mounting device main body 20 consists of a work station 64 provided on the front side of the table 62 and a robot section 66 provided on the rear side. The work station 64 has a U-shaped frame shape with an opening extending forward from the center, through which the transfer and reversing device 22 can move above the work station 64. Robot section 66
, a base 68 rotatably erected on the table 62, a two-jointed arm 70 held horizontally by the base 68, and a vertically slidable arm 70 at the tip of each arm 70. A seat take-out hand 72 and a leg take-out hand 74 are provided. The palm ejecting hand 72 has a magnetic catch 75 that attracts the palm using magnetic force. When the chassis 26 is made of a non-magnetic material, the magnetic catch 75 can be replaced with a vacuum chuck which performs suction using a vacuum. The operation of taking out the chassis 26 from the chassis alignment device 16 is performed in the order of arrows B to F in FIG. First, the palm ejecting hand 72 located on the chassis alignment device 16 is lowered, the magnetic catch 75 is energized, and the chassis 2 is positioned at the top of the chassis alignment device 16.
6 is adsorbed. Next, raise the extraction hand 72,
After bending the joint of the arm 70 of the robot section and moving it onto the workstation 64, the chassis retrieval hand 72 is lowered onto the workstation 64, and the workpiece is inserted into the positioning holes drilled in advance near the left and right ends of the chassis 26. The chassis 26 is placed on stands 78 (see FIG. 9) fixed to the four corners of the work station 64 while fitting positioning pins 76 protruding from the left and right centers of the station 64. At this time, the leg mounting hole 80 of the chassis 26 is connected to the stand 78.
located above. After the chassis 26 is transferred to the work station 64, the attraction of the chassis removal hand 72 is released and it rises. The chassis 26 is held downwardly on a workstation 64.

On the other hand, as shown in FIG. 8, the leg extraction hand 74 is fitted into a first cylinder 80 attached to the tip of the arm 70, and is slidably fitted in the cylinder 80 in the vertical direction by the action of compressed air. and a piston 82 extending downward.
The lower end of the second cylinder 84 is open. The work of attaching the legs 32 to the chassis 26 is as follows:
This is done in the order of arrows G to L in FIG. First, the joint of the arm 70 is bent and the leg take-out hand 74 is moved above the leg supply pusher 58 across the index table 40 of the leg supply device 18. Next, the leg supply pusher 58 is raised, the leg 32 with the pusher rivet 36 held on the index table 40 is pulled out, and the leg hole 54 of the leg 32 is fitted into the lower end of the second cylinder 84 of the leg extraction hand 74. At this time, the head of the push rivet 36 is
The piston 82 is located directly above the opening of the cylinder 84 . After the leg 32 is held by the leg take-out hand 74, the leg supply pusher 58 moves downward. On the index table 40 side, the above-described push rivet 36 is then assembled to the leg 32 and the index table 40 is rotated (see arrows J', K', and L' in FIG. 2).

Next, bend the joint of the arm 70 and use the leg extraction hand 7.
4 placed on the workstation 64
6, move above one of the leg attachment holes 80, lower the leg extraction hand 74, and attach the leg 32 to the chassis 26. Specifically, the piston 82 is lowered together with the second cylinder 84, and the tip of the push rivet 36 protruding downward from the leg 32 is inserted into the hole 80 of the chassis 26. A die 86 is installed in the stand 78 on the lower side of the chassis 26. After the push rivet 36 comes into contact with this die 86 and the second cylinder 84 stops, the piston 82 is further lowered to pressurize the push rivet 36, deforming the tip of the push rivet 36, and fastening it to the chassis 26. Completion of attachment of the legs 32 to the chassis 26 is confirmed by turning on a confirmation switch 90 by a slide rod 88 provided within the die 86.

After attaching the legs, the leg removal hand 74 rises. Then, the legs 32 are attached to the four corners of the chassis 26 by repeating the same operations as described above. After attaching the four legs, the arm 70 is bent at its joint and positioned on the seat alignment device 16 (see arrow M in FIG. 2).

The transfer and reversal device 22 is installed on a table 94, and includes a rotary actuator 96, a slide arm 98 attached to the rotary actuator 96 in a cantilevered manner, and a slide arm 98 attached to the tip of the slide arm 98. It is composed of a vertical arm 100 and a magnetic catch 102 provided on the vertical arm 100. The rotary actuator 96 has the function of rotating the slide arm 98 180 degrees between the work station 64 and the conveyor device 12 in a vertical plane. The slide arm 98 is extendable and retractable in its axial direction, and the vertical arm 100 at the tip thereof is telescopically moved, and the vertical arm 100 is extendable and retractable to move the magnetic catch 102 in the direction perpendicular to the slide arm 98. slide arm 98
When the intermediate stopper 106 (see FIG. 3), which is provided on the arm body 104 so as to be freely advanced and retracted, is retracted, it extends to the maximum extent, and when the intermediate stopper 106 advances, the extension movement is restricted to a predetermined position. ing. Magnetic catch 102 can be replaced with a vacuum catch if chassis 26 is non-magnetic.

The chassis 26 after the legs are attached by the transfer/reversal device 22
The movement is performed in the order of arrows N to Y in FIG.
However, the robot section 66 is equipped with the chassis alignment device 16 in advance.
moving to the side. First, vertical arm 100
In the retracted state, the slide arm 98 is advanced to the maximum without applying the stopper 106, and is moved to a predetermined position below the downward facing chassis 26 after the legs are attached, which are placed on the work station 64. Next, raise the vertical arm 100 and release the magnetic catch 10.
After the chassis 26 is attracted and separated from the push-up positioning pin 76 by the excitation of step 2, the slide arm 98 is retreated, and then the vertical arm 100 is lowered.

Next, the rotary actuator 96 is operated to rotate the slide arm 98 by 180 degrees. After the rotation is completed, the intermediate stopper 106 is advanced and the slide arm 98 is advanced. The slide arm 98 comes into contact with the intermediate stopper 106 and stops. At this time,
The chassis 26 carries pallets 1 on the conveyor device 12.
It is positioned upwardly above the positioning pin 110 implanted in 08. Next, vertical arm 10
0 and placed on the pallet 108 while fitting the positioning pin 110 into the positioning hole of the chassis 26, the excitation of the magnetic catch 102 is turned off to complete the transfer. After the transfer is completed, the vertical arm 100 is raised, the intermediate stopper 106 is removed, the slide arm 98 is retreated, and the rotary actuator 96 is operated to rotate back toward the work station 64.

A slide arm 98, a vertical arm 100, which are each slide operation part of the transfer and reversal device 22,
The intermediate stopper 106 and the rotary actuator 96 are equipped with a fine adjustment mechanism for position setting, and are adjusted in advance before operation of the apparatus.

As described above, the chassis 2 with the legs attached is inverted from the work station 64 by the transfer and inversion device 22 and placed upward on the conveyor device 12.
6 is conveyed to the conveyor device 12 and moved to the next step of assembling electronic components and the like.

In this way, in this embodiment, the chassis after the legs are attached is rotated 180 degrees in the vertical plane to perform the transfer, so the transfer from the work station to the conveyor device and the reversal of the chassis are done at the same time. The device configuration is extremely simple compared to the case where the transfer device and the reversing device are provided separately.

In the above embodiment, the bottom plate leg attachment device was installed in an assembly line, but the present invention is not limited to this in any way. You may also do so.

[Effect of the invention] As explained above, in the bottom plate leg attaching device according to the present invention, the chassis is taken out from the chassis supply device, placed face down on the workstation, the legs are attached to the chassis, and then the legs are attached to the chassis while being turned over. As a series of operations are carried out in one device until the pallet is transferred to the
By only occupying one sheet, the sheet with legs attached can be transferred to the next process in an upward position, making it possible to effectively utilize the line.

Furthermore, when used offline, the work efficiency is improved by eliminating the trouble of reversing the bottom plate.

Furthermore, the arm section of the transfer/inversion device is extendable and retractable, so by retracting the arm section, the bottom plate leg attachment device can be used in narrower spaces, and when the distance between the work station and the conveyor device is long. The transfer and reversal work can be easily performed by extending the arm portion.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing a bottom plate leg attachment device according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the overall operation of the leg attachment work in FIG. 1, and FIG.
Explanatory diagrams showing the chassis transfer operation in Figures 4 and 5.
The figure is an explanatory diagram showing the push rivet installation operation of the leg supply device in FIG. 1, FIGS. 6 and 7 are explanatory diagrams showing the leg supply operation of the leg supply device in FIG.
9 are explanatory diagrams showing the leg attaching operation of the leg extracting hand of FIG. 1. DESCRIPTION OF SYMBOLS 10... Bottom plate leg attachment device, 16... Chassis alignment device, 18... Leg supply device, 20... Leg attachment device main body, 22... Transfer reversing device, 26... Chassis, 32... Legs, 64 ...work station,
72... Palm take-out hand, 74... Leg take-out hand.

Claims (1)

[Scope of utility model registration request] a bottom plate feeding device that feeds the bottom plate facing downward;
It has a leg supply device that supplies legs and a work station that attaches the legs, and one of the two-jointed arms that is held horizontally by a base that is rotatably erected on a table. A first hand is provided on the tip of the arm so as to be slidable in the vertical direction, and a second hand is provided on the other tip of the arm so as to be slidable in the vertical direction, and the first hand is , the second hand is configured to take out a bottom plate from the bottom plate supply device, and the second hand includes a mounting device main body configured to take out the legs from the leg feed device and attach them to the bottom plate on the workstation, and an extendable arm portion. and a transfer and reversing device that transfers the bottom plate from the work station to the outside while inverting the bottom plate after the legs are attached using a suction part provided at the tip of the arm part. Device.