JPS6014657B2 - Screw selection supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screw selection and supply device that selects any screw from among a plurality of screws of different types that are conveyed and separately feeds screws of the same type from two screw extraction ports. It is.

In recent years, due to the demand for labor saving in various industries, even assembly work has been automated.

Particularly when screw tightening is performed using an automatic machine, the screws are supplied to the assembly by sequentially bringing one screw supply port to the screw tightening position. In this case, a device is required to select and continuously supply the required screws from several types of screws depending on the screw tightening position. In order to meet such demands, the applicant has already proposed a screw selective supply device as shown in Japanese Utility Model Publication No. 14271/1983. 1st
The figure is an overall view showing the state of use of this device. In this figure, 1 is a bowl feeder, and different types of screws are sorted by this bowl feeder 1 and sent through a straight chute 2 to a screw selection and supply device 3. This screw selection supply device 3
is provided with a plurality of screw ejecting ports corresponding to the types of screws, and the conveying hoses 4 connected to each of these ejecting ports are collected at the assembly head 5 and are connected to the to-be-assembled objects 7 transferred on the conveyor 6. Selectively feed screws. In the figure, reference numeral 8 denotes an assembly robot, and the assembly head 5 is fixed to the tip of an arm 9 extending from the assembly robot 8 onto the conveyor 6 via a mounting plate 10. Further, 11 is a driver similarly fixed to the tip of the arm 9. The assembly head 5 and driver 11 are moved to arbitrary positions by the operation of the assembly robot 8 and cylinder 12. In the screw selection and supply device configured as described above, the number of conveyance hoses 4 is equal to the number of types of screws, and the conveyance hoses 4 not only act as resistance when the mounting head 5 moves; There was also a risk that the screw would get caught at the junction of the hoses.

Now, in order to improve assembly efficiency, we consider the case where the objects 7 to be assembled are moved in pairs on the conveyor 6 and two assembly heads 5 are attached to the tips of the arms 9. In the above apparatus, not only two apparatuses are required, but also twice the number of conveyance hoses 4 are required, and the movement resistance of the assembly head 5 becomes considerably large.

Moreover, even if a screw gets caught in either one of the confluence points of the hoses 4, the entire apparatus must be stopped. Furthermore, even though there are transport hoses 4 in the textbook, screws are not sent from these at the same time, so it is not necessarily rational to prepare a number of transport hoses 4 corresponding to the number of types of screws. I can't say that. The present invention was made in view of these problems, and includes a control base having a concave groove facing a screw conveying path and a screw support member selectively exiting from this concave structure, and a control base having a concave groove in the control base. The control table and the distribution table are each reciprocated by a position actuator. This extremely simple configuration not only reduces the number of conveying hoses and reduces the movement resistance of the assembly head, but also provides a screw selection and supply device that allows the screws to be easily caught.

The present invention will be explained in detail below based on the drawings. FIG. 2 is an overall view showing the use of a screw selection and supply device that supplies five types of screws from two screw outlets in an embodiment of the present invention, FIG. 3 is a plan view thereof, and FIG. FIG. 5 is a longitudinal sectional side view of the upper part taken along the line AA in FIG. 3 and the lower part taken along the line BB in FIG. 5, and FIG. 5 is a longitudinal sectional front view taken along the line V-V.

In these figures, reference numerals 13 to 13e indicate screw conveyance paths arranged in parallel with an interval m (see FIG. 3), and this conveyance path 1
3a to 3e are formed by two opposing rails, and the lower surface of the head of the screw a4 is supported on these rails, and the screw 14 is conveyed. Reference numeral 15 denotes a holding plate provided opposite to the supply ends of the conveyance paths 13a to 13e, and grooves constituting part of the three conveyance paths are provided at positions corresponding to the respective conveyance paths 13a to 13e.

That is, this groove is the groove 16 into which the head of the screw 14 engages.
a and a groove 16b having the same width as the rail spacing of the transport paths 13a to 13e. Note that this holding plate 15 is fixed to the frame 17. Reference numeral 18 denotes a control table that is slidably installed, and strokes in a direction perpendicular to the direction in which the screws 14 are conveyed.
), and this control stand 18
On the surface facing the conveyance paths 13a to 13e, each conveyance path 1
Concave grooves 19a to 19e are formed corresponding to 3a to 3e.

These grooves 19a to 19e are grooves 16a provided in the holding plate 15.
It has the same width and penetrates in the vertical direction. A distribution table 20 is provided below the grooves 19a to 19e so as to be movable in the same direction as the control table 18. This sorting table 2
0 is provided with screw delivery holes 21a to 21f, which are one more in number than the number of the grooves 19a to 19e and penetrated downward at the same distance m as the grooves 19a to 19e. This sorting table 2 has a holding member 22 fixed to the holding plate 15.
It is held so as to reciprocate within a stroke m in the same direction as the control base 18. That is, a sliding hole 22a is formed in the holding member 22 and extends vertically and extends in the reciprocating direction of the sorting table 20, through which the lower part of the sorting table 20 is held. A collection block 23 is coupled to the lower end of the sorting table 20. This collective block 23 has the respective screw delivery holes 21a to
At the same time, two screw outlet ports 23a and 23b are formed by gathering every other screw feed hole 21a to 21f. In addition, a conveying air intake port 23c for conveying screws is provided near the collection point of each of the screw delivery holes 21a to 21f.
Screw support members 24a to 24e, which can move forward and backward, are provided in a to e, and the ends of the support members 24a to 24e on the side of the conveyance paths 13a to 13e support the heads of the screws 14, and also support the threaded portions of the screws 14. A groove 25 into which the groove 025 engages is provided, and this groove 25 is arranged so as to face into the grooves 19a to 19e. 26
is a two-position actuator for advancing and retracting the screw support members 24a to 24e, and is provided on a support portion 27 protruding from the control base 18 so as to face the screw support members 24a to 24e. .

Further, 28 is a two-position actuator for reciprocating the control base 18 with a stroke, and a bracket 29 fixed to the holding plate 15 and the holding member 22
Fixed. 30 is a two-position actuator for reciprocating the magazine sorting table 20 with a stroke m, and is provided on a bracket 31 fixed to the holding plate 15 and the holding member 22.

Next, the operation of this device will be explained with reference to FIG.

Figure a shows that the most advanced screws of the screws 14 conveyed from the conveyance paths 13a to 13e enter the concave grooves 19 of the control base 18, and are transferred to the grooves 25 of the screw support members 24a to 24e, respectively. The state in which it is held on the groove 25 is shown. In this state, as shown in FIGS. 3 and 5, the groove 19 and the screw holes 21a to 21f are not aligned properly. From this state, if the actuator 28 is actuated to move the control base 18 by one stroke in the direction penetrating the page to the back side, the five grooves 19a to 19e will be inserted into the five screw delivery holes 21a to 21e among the six. 2, and prevents the subsequent movement of the screw 4, resulting in the state shown in Figure b. One of the screw supporting members 24a to 24e supporting the screw to be supplied next is connected to the actuator 2.
When the screw 14 is moved in the direction of the arrow shown in FIG. Now, conveyance bribe 1
3c and the groove 19c, since the groove 19c communicates with the screw delivery hole 21c, the fallen screw 14 is guided toward the outlet 23b. Next, after returning the screw support member 24c in the direction of the arrow d in the same figure, the actuator 28 is operated to return the control base 18 to a stroke in a direction penetrating the plane of the drawing to the front side, and the screw 14 is recessed. It is introduced into the groove 19c. Then, when the control table 18 is again moved by a stroke in the penetrating direction to the back side of the paper (this state is the same as in Figure a), and the distribution table 20 is also moved by a stroke m in the same direction, the grooves 19a to 19e are It passes through the holes 21b to 21f and becomes in the state shown in the figure e. After that,
If the screw support village 24c is moved in the direction of the arrow f in the figure, the screw 14 will fall into the screw delivery hole 21d, and the screw 14 will fall into the screw outlet 23.
guided by a. After returning the screw support member 24c, the control table 18 and the distribution table 20 can be returned to the same position as shown in FIG.
Return to state and prepare for supplying the next screw. in this way,
By moving only the control base 18 or moving both the control base 18 and the distribution base 20, the five types of screws can be divided into two types.
The screw can be sent to either of the screw outlet 23a or 23b of the book. This apparatus constructed as described above is used as shown in FIG.

That is, two assembly heads 32 are fixed to the tip of the arm 9 via a mounting plate 10, and each screw outlet 23a of the screw selection supply device 33 according to the present invention is attached to the assembly heads 32.
23b (see FIGS. 4 and 5) is connected to the conveyor hose 4 which is passed through the pipe. That is, between the screw selection supply device 33 and each mounting head 32, there is one transport hose 4,
It is accelerated by 4. In this figure, the same parts as in FIG. 1 are designated by the same reference numerals. In the embodiment described above, the sorting table 22 and the collecting block 23 are separate bodies, and the collecting block 23 is provided with two screw extraction ports 23a and 23b. It's okay.

As explained above, according to the present invention, multiple types of screws are guided to the two screw extraction ports by the selective reciprocating motion of the control table and the distribution table, so that each assembly head is connected to the screws. The number of transport hoses is extremely small compared to conventional equipment,
The movement resistance of the assembly head is also reduced.

Furthermore, since the number of conveyance hoses is reduced, the total path for supplying screws is shortened, and as a result, accidents caused by screws getting caught are reduced. Furthermore, since the control table and the distribution table are operated by a two-position actuator such as an air cylinder or a solenoid, there is an advantage that not only the configuration is simple but also the operation is quick and reliable.

[Brief explanation of the drawing]

Fig. 1 is an overall view showing how the subordinate screw selection and supply device is used, Fig. 2 is an overall view showing how an embodiment of the invention is used, and Fig. 3 is a plan view showing the main parts of the invention. , FIG. 4 and FIG. 5 are a longitudinal side view and a longitudinal front view, and FIG. 6 is an explanatory diagram of the operation. 13a-e... Conveyance path, 14... Screw, 18... Control stand, 19a-e... Concave groove, 20... Sorting table, 21a-f...
・Screw delivery hole, 23a, 23b...0 screw outlet, 24a-e...screw support member, 33...
Screw selection feeding device. Figure 2 Figure 3 Figure 4 Figure 1 Figure 5 Figure 6

Claims (1)

[Claims] 1. A control table 18 having concave grooves facing each of a plurality of screw conveyance paths arranged in parallel at equal intervals and reciprocating in a direction perpendicular to the conveyance direction, and a tip provided slidably on this control table. a screw supporting member 24 whose portion selectively exits from the groove; and a sorting table having a plurality of screw delivery holes selectively communicating with the groove of the control table and reciprocating in the same direction as the control table. 20, and the screw feed hole 2 is fixedly installed on this sorting table.
A screw selection and supply device comprising a collecting block 23 that collects at screw extraction ports 23a and 23b of a book, and two-position actuators 28 and 30 that reciprocate the control table and the distribution table.