JP4601563B2 - Parts assembly device - Google Patents

Description

  The present invention relates to a part assembling apparatus used for part assembling work such as fastening a screw as a part to a work.

In order to increase the efficiency of screw tightening work when tightening a screw to a workpiece, an automatic screw tightening machine that performs screw tightening with a driver bit (electric driver) has been widely used (see, for example, Patent Document 1). .
JP-A-11-156650

  By the way, in order to further improve the efficiency of the screw tightening operation on the workpiece by the automatic screw tightening machine, it is necessary to consider the movement operation of the workpiece with respect to the lifting and lowering operation of the driver bit as a tool. However, the conventional automatic screwing machine as disclosed in Patent Document 1 does not disclose the movement operation of the workpiece with respect to the raising / lowering operation of the driver bit, and the automatic screwing that can further increase the efficiency of the screwing operation is disclosed. A fastening machine was desired.

  Therefore, the present invention considers the movement operation of the workpiece with respect to the lifting / lowering operation of a tool (for example, a driver bit), and can perform a component assembling operation such as a screw tightening operation on the workpiece more efficiently. The purpose is to provide.

To achieve the above object, the component assembling apparatus according to the present invention includes at least one component supply unit, a component supply port provided in the component supply unit according to the number of the component supply units, and the component A component installed on the upper side of the supply port and having an assembling means for assembling a component supplied from the component supply port to the workpiece, and a workpiece placing means for detachably placing the workpiece. In the assembling apparatus, the assembling means is provided so as to be movable between a standby position, a component assembling position, and a component supplying position along the vertical direction, and the standby position is located on the uppermost side and the lowermost side. The component supply position has the component assembly position in the middle thereof, and the workpiece mounting means is provided so as to be movable in a direction orthogonal to the moving direction of the assembly means. Assembly of parts To move between the location, furthermore, the component feed port on the lower side of the component mounting position is characterized by being provided.

The invention according to claim 2 is characterized in that a plurality of the assembling means are installed at a predetermined interval, and the plurality of assembling means are movable in the vertical direction at the same timing. Yes.

The invention described in claim 3 is characterized in that a plurality of the workpiece mounting means are provided in the vertical direction .

According to a fourth aspect of the present invention, there is provided a plurality of workpiece placement means, wherein the workpiece placement means located on the lower stage side of the movement amount of the workpiece placement means located on the upper stage side of the plurality of workpiece placement means. The movement amount is lengthened so that the workpiece standby position of the workpiece placing means located on the upper stage side and the workpiece waiting position of the workpiece placing means located on the lower stage side do not overlap in the vertical direction. It is characterized by.

According to the first aspect of the present invention , the assembling means is moved in the vertical direction and the work placing means is moved only in the direction perpendicular to the moving direction of the assembling means without moving the component supply port. Thus, it is possible to perform the work of assembling the parts to the work from holding the parts to the assembling means, and the work of assembling the parts such as the screw tightening work to the work can be performed more efficiently.

  Hereinafter, the present invention will be described based on illustrated embodiments. 1 is a perspective view showing an embodiment in which a component assembling apparatus according to the present invention is applied to a screw tightening apparatus, FIG. 2 is a front view thereof, FIG. 3 is a plan view thereof, and FIG. 4 is a side view thereof. is there.

  As shown in these drawings, a screw tightening device (parts assembling device) 1 according to the present embodiment includes a plurality of (three in the present embodiment) screw feeders 3 installed on a square base 2. 4 and 5 and plate-like first and second work tables 6 and 7 installed in a horizontal state in two upper and lower stages, and first and second work bases 8 and 9, respectively. First and second moving mechanisms 10 and 11 that are moved along the planes of the work tables 6 and 7, respectively, and driver units 12, 13, and 14 as a plurality (three in this embodiment) of electric drivers The main plate includes an elevating mechanism 16 for vertically moving (elevating) the fixed plate 15 to which the driver units 12, 13, and 14 are fixed, and a side plate 17 on which the elevating mechanism 16 is installed. The side plate 17 side of the screw tightening device 1 is the rear part, and the side where the first and second work bases 8 and 9 are located during standby (the state shown in FIGS. 1 to 4) is the front part.

  The screw feeders 3, 4, and 5 position a large number of screws (for example, screws 40 as shown in FIG. 5) placed in the screw insertion ports 3 a, 4 a, and 5 a below the second work table 7. Each screw supply port (not shown) is provided with a screw supply mechanism (not shown) for supplying one screw at a time so that the screw head 40a faces upward.

  The first work table 6 on the upper side is fixed to the side plate 17 at the rear end side with a predetermined distance from the second work table 7 on the lower side. The first moving mechanism 10 provided on the first work table 6 includes guide members 18a and 18b installed on both sides of the first work table 6 in the front-rear direction (the left-right direction in FIG. 4) along the plane, A movable member 19a, 19b, which is provided on the outer peripheral surface of each of the guide members 18a, 18b, and a first work base 8 as a drive source for moving the first work table 8 fixed on the movable members 19a, 19b in the front-rear direction. An air cylinder 20 is provided. The rear end sides of the guide members 18a and 18b are fixed to the side plate 17.

  The lower second work table 7 is installed in parallel with the first work table 6 so as to be positioned above the screw supply ports (not shown) of the screw feeders 3, 4, and 5. Yes. The front side of the second work table 7 is fixed on the base table 2 via support members 21 a and 21 b, and the rear side of the second work table 7 is fixed to the side plate 17. The second work table 7 has a width in the front-rear direction so that the second work table 9 on the second work table 7 is exposed from the front side of the first work table 6 during standby (the state shown in FIGS. 1 to 4). It is longer than the first work table 6.

  The second moving mechanism 11 provided on the second work table 7 includes guide members 22a and 22b installed on both sides of the second work table 7 along the plane in the front-rear direction (left-right direction in FIG. 4), respectively. A second moving source 23a, 23b provided on the outer peripheral surface of each of the guide members 22a, 22b and a second driving source for moving the second work table 9 fixed on the moving members 23a, 23b in the front-rear direction. An air cylinder 24 is provided. The rear end sides of the guide members 22a and 22b are fixed to the side plate 17.

  The first and second air cylinders 20 and 24 detect the positions of the first and second work bases 8 and 9 (work standby position and screw tightening position) based on the extension position of the cylinder rod, respectively. Position detection sensors 25a and 25b (the second work table 7 side is not shown) are provided.

  At positions corresponding to the vicinity of the screw tightening positions of the first and second work tables 6, 7, the driver bits 12 a, 13 a, 14 a of the driver units 12, 13, 14 are connected to the screw supply ports (not shown). Are provided with openings 6a, 6b, 6c (the second work table 7 side is not shown).

  The driver units 12, 13, and 14 installed in a line at a predetermined interval are respectively connected to the driver bits 12a, 13a, and 14a and the motors 12b and 13b that rotate and drive the driver bits 12a, 13a, and 14a, respectively. , 14b and the like. The tip of each driver bit 12a, 13a, 14a is formed in a shape that can be engaged with an engagement groove 40b formed in a screw head 40a (see FIG. 5). It is magnetized so that it can be held.

  The elevating mechanism 16 includes guide shafts 26a and 26b installed on both sides of the side plate 17 along the vertical direction, and vertically movable members 27a and 27b (see FIG. 3) provided on the outer peripheral surfaces of the guide shafts 26a and 26b, respectively. And a third air cylinder 28 as a drive source for moving the fixed plate 15 (driver units 12, 13, 14) fixed to the vertical movement members 27a, 27b in the vertical direction. The lower end sides of the guide members 26 a and 26 b are fixed to the first work table 6.

  The third air cylinder 28 provided on the upper side of the side plate 17 has a position of each driver bit 12a, 13a, 14a that moves linearly in the vertical direction based on the extended position of the cylinder rod 28a (from the lowest position to the highest position). 4 position detection sensors 29a, 29b, 29c, for detecting the position of the screw supply port, the work position on the second work table 9, the work position on the first work table 8, and the driver bit standby position), respectively. 29d is installed.

  The side plate 17 is fixed on the base table 2 by fixing plates 30a and 30b installed on the back surface thereof. Further, the side plate 17 is positioned near the driver bit standby position (state shown in FIG. 1) to detect whether or not the screw is normally held at the tip of each driver bit 12a, 13a, 14a. Non-contact type screw detection sensors 31a, 31b, 31c and 31d are respectively installed.

  The control unit 32 provided on the base 2 is preset with the position detection sensors 25a and 25b (the position detection sensors on the second air cylinder 25 side are not shown) and detection signals from 29a to 29d. A series of screw tightening operations are performed based on the operation procedure, and the first and second and third air cylinders 20, 24 and 28 are operated and the operation timing is controlled, and the rotation control of each motor 12b, 13b and 14b is performed. Execute. Hereinafter, the screw tightening operation by the screw tightening device 1 will be described with reference to the flowchart shown in FIG.

  When the first and second work bases 8 and 9 are at the work standby position (the state shown in FIGS. 1 to 4), which is the initial position, the worker is placed on the first and second work bases 8 and 9. After placing the first and second workpieces 33a and 33b (the first workpiece 33a and the second workpiece 33b are the same), the start switch 34 is turned on, and the third air is based on the signal from the control unit 32. The cylinder 28 is operated (step S1). The operation of the third air cylinder 28 causes the elevating mechanism 16 to lower the driver units 12, 13, and 14 in the driver bit standby position (the state shown in FIGS. 1 to 4) integrally with the fixed plate 15 (step S2).

  First, when the tip of each driver bit 12a, 13a, 14a descends to the vicinity of each screw supply port (not shown) of the screw feeder 3, 4, 5, based on the output of the detection signal from the position detection sensor 29a. Once stopped, the screw is held by magnetic force (step S3). Then, by the operation of the third air cylinder 28, the driver units 12, 13, and 14 are moved up and down integrally with the fixed plate 15 by the elevating mechanism 16 (step S4). Then, the driver bits 12a, 13a, and 14a are stopped at the driver bit standby position based on the detection signal from the position detection sensor 29d.

  At this time, it is detected by the screw detection sensors 31a, 31b, 31c, and 31d whether or not the screws are normally held at the tip portions of the driver bits 12a, 13a, and 14a (step S5). When it is detected in step S5 that the screw is normally held in each driver bit 12a, 13a, 14a (step S5: YES), the first air cylinder 20 is then operated (step S6). If the screw detection sensors 31a, 31b, 31c, 31d detect that any of the driver bits 12a, 13a, 14a is not holding a screw (step S5: NO), the subsequent operation is performed. The operator stops and informs the operator that a screw retention failure has occurred, for example, by turning on (or blinking) a warning light (not shown).

  Then, in step S6, the first moving mechanism 10 places the first work on the first work cylinder 10 by the operation of the first air cylinder 20 in a state where the screws are normally held in the driver bits 12a, 13a, 14a. The work table 8 is moved to the screw tightening position provided with the openings 6a, 6b, 6c (step S7). Then, based on the detection signal from the position detection sensor 25a, the first work table 8 is stopped at the screw tightening position.

  Then, by the operation of the third air cylinder 28, the driver units 12, 13, and 14 are lowered integrally with the fixed plate 15 by the elevating mechanism 16 (step S8). And based on the detection signal from the position detection sensor 29c, the front-end | tip part which hold | maintained the screw | thread of each driver bit 12a, 13a, 14a is stopped in a screwing position.

  And each motor 12b, 13b, 14b is rotationally driven, and the 1st workpiece | work 33a on the 1st workpiece base 8 is screwed with each rotating driver bit 12a, 13a, 14a (step S9). At this time, when a torque sensor (not shown) provided in each driver unit 12, 13, 14 detects that a predetermined tightening torque value has been reached, the rotational drive of each motor 12b, 13b, 14b is stopped. End the screw tightening operation.

  When this screw tightening operation is completed, the driver unit 12, 13, 14 is moved up and down integrally with the fixed plate 15 by the lifting mechanism 16 by the operation of the third air cylinder 28 (step S10). Then, the driver bits 12a, 13a, and 14a are stopped at the driver bit standby position based on the detection signal from the position detection sensor 29d.

  Then, by the operation of the first air cylinder 20, the first work base 8 on which the screwed first work is placed is moved to the work standby position by the first moving mechanism 10 (step S11). Then, based on the detection signal from the position detection sensor 25b, the first work table 8 is stopped at the work standby position.

  Then, the screw tightening operation for the second work 33b on the second work table 9 is executed in the same manner as the screw tightening operation (steps S1 to S11) for the first work 33a on the first work table 8 (step S1). S12).

  And after completion | finish of the screw fastening operation | work with respect to the 1st workpiece | work 33a on the above-mentioned 1st workpiece base 8, and the screw fastening operation | work with respect to the 2nd workpiece | work 33b on the 2nd workpiece base 9, by the action | operation of the 3rd air cylinder 28, As described above, the driver units 12, 13, and 14 are lowered integrally with the fixing plate 15 by the elevating mechanism 16, and the screws are held at the tip portions of the driver bits 12 a, 13 a, and 14 a by the screw supply ports (not shown). Later, while the driver bits 12a, 13a, and 14a are raised to the driver bit standby position, the first and second screwed screws on the first and second work bases 8 and 9 in the workpiece standby position are displayed. The second workpieces 33a and 33b are removed, and the next workpiece is placed on the first and second workpiece tables 8 and 9, respectively.

  Hereinafter, the above-described series of screw tightening operations (steps S1 to S12) are repeated. Further, when stopping the series of screw tightening operations described above, the screw tightening operation is stopped by the operator pressing a stop button (not shown).

  Thus, according to the screw tightening apparatus according to the present embodiment, the lifting and lowering operation of the driver bits 12a, 13a and 14a by the lifting mechanism 16 and the first and second moving mechanisms 10 and 11 by the first and second moving mechanisms 10 and 11 are performed. The screw work for the first and second workpieces 33a and 33b can be performed from the holding of the screws to the driver bits 12a, 13a and 14a only by the movement operation of each of the workpiece tables 8 and 9. It is possible to perform the screw tightening work on the workpiece more efficiently.

  Further, by using air cylinders (first, second, and third air cylinders 20, 24, and 28) as drive sources for the first and second moving mechanisms 10 and 11 and the lifting mechanism 16, respectively, The first and second moving mechanisms 10 and 11 and the lifting mechanism 16 can be operated with a simple configuration.

  In the above-described embodiment, the component assembling apparatus according to the present invention is applied to the screw tightening apparatus. However, the present invention is also applied to, for example, a rivet caulking apparatus for caulking a work with a rivet. It is possible to apply.

The perspective view which shows the screw fastening apparatus which concerns on embodiment of this invention. The front view which shows the screw fastening apparatus which concerns on embodiment of this invention. The top view which shows the screw fastening apparatus which concerns on embodiment of this invention. The side view which shows the screw fastening apparatus which concerns on embodiment of this invention. The perspective view which shows a screw. The flowchart which shows the screw fastening operation | work by the screw fastening apparatus which concerns on embodiment of this invention.

Explanation of symbols

1 Screw tightening device (component assembly device)
3,4,5 screw feeder (part supply means)
6 1st work table 7 2nd work table 8 1st work stand (work mounting means)
9 Second work table (work placement means)
DESCRIPTION OF SYMBOLS 10 1st moving mechanism 11 2nd moving mechanism 12, 13, 14 Driver unit 12a, 13a, 14a Driver bit (assembly means)
12b, 13b, 14b Motor 16 Elevating mechanism 20 First air cylinder 24 Second air cylinder 28 Third air cylinder 25a, 25b Position detection sensor (work position detection sensor)
29a, 29b, 29c, 29d Position detection sensor (assembly means position detection sensor)
32 Control unit 33a First work 33b Second work

Claims (4)

At least one or more component supply means, a component supply port provided in the component supply means according to the number of the component supply means, and an upper side of the component supply port, and supplied from the component supply port In a part assembling apparatus having an assembling means for assembling a part to a work and a work placing means for detachably placing the work.
The assembly means is provided movably between a standby position, a component assembly position and a component supply position along the vertical direction, the standby position on the uppermost side, the component supply position on the lowermost side, In the middle there are the parts assembly positions,
The workpiece mounting means is provided so as to be movable in a direction orthogonal to the movement direction of the assembly means, and moves between a workpiece standby position and the component assembly position,
Further, the component assembling apparatus , wherein the component supply port is provided below the component assembling position . 2. The component assembling apparatus according to claim 1, wherein a plurality of the assembling means are installed at a predetermined interval, and the plurality of assembling means installed are movable in the vertical direction at the same timing. . The component assembling apparatus according to claim 1 , wherein a plurality of the work placing means are installed in the vertical direction . With respect to the plurality of workpiece placement means, the movement amount of the workpiece placement means positioned on the lower side is made longer than the movement amount of the workpiece placement means located on the upper stage side, and the upper stage 4. The component according to claim 3 , wherein the workpiece standby position of the workpiece mounting means positioned on the side and the workpiece standby position of the workpiece mounting means positioned on the lower side do not overlap in the vertical direction. 5. Assembly device.

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