JPS58160030A - Bolt fastening method and device - Google Patents

Abstract

PURPOSE:To enable the feeding and the screw-fitting of a bolt to be performed automatically and continuously by a method wherein in an automatic assembling machine, a rotary tool of a vertically movable plate guided by a stationary shaft and a rotary shaft are made to become engaged with, or disengaged from, a slide rod of a rotary plate rotatably by 180 degrees through the up and down movements of the vertically movable plate. CONSTITUTION:When a vertically movable plate 16 fitted about a stationary guide shaft 11 is lowered by a cylinder 14, a rotary plate 33 is also lowered through a rotary member 39 and a spring 45 and a part stop 60 stops as a result of its contact with an assembled part B. Upon further lowering of a plate 16, a rotary tool 25 and a slide rod 53 holding a bolt A, and a rotary shaft 21 and a slide rod 53 having magnet 59 at the top thereof, are brought into engagement with each other, respectively, by the rotation of a nut runner 26 and a rotary cylinder 18. Then the bolt A is screwed into the assembled part B by a rotary tool 29 while springs 24, 31 and 55 are compressed and a new bolt A is held in a hexagonal hole 58 drilled in the slide rod. Thus, when the above operation is completed and the plate 16 and the rotary plate 33 moves up to become disengaged from the related members, the rotary plate 33 is rotated by 180 degrees through a gear section 47 to thereby initiate the next operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bolt assembly device that can be widely used as an accessory device for automatic assembly machines, various special processing machines, and the like.

Screws and bolts have been used in many places, including valley line machinery, devices, and parts. However, although screws and bolts are frequently tightened when assembling these machines, equipment, etc.
Examples of automation are limited to small screws, and at present there is no suitable automated device that can immediately tighten bolts after they have been transferred. Therefore, in most cases, the bolts used to connect the assembled parts are either manually tightened by workers, or a two-step device is used to insert and tighten the bolts. It is.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An automated bolt assembly system for tightening bolts into a book is provided.The content will be explained in detail by showing one embodiment of the present invention. FIG. 1 shows an overall schematic diagram of an embodiment of the present invention, FIG. 2 shows a sectional view of a supporting part, and FIG. 8 shows an explanatory diagram of a rotational drive part. In the figure, parts A are aligned and sent through alignment grooves by parts feeders and held in a predetermined position by a bolt positioning rock #f (not shown). The invention relates to a device for transporting this held bolt to the assembly part B and for screwing the bolt into position.

First, the fixed guide shaft 11 and the auxiliary guide shaft 12 are fixed and erected on the pace 10 of the machine. A 1 m horizontal plate is installed above the fixed guide shaft 11 and the auxiliary guide shaft 12, and the horizontal plate 18
The vertical mechanism 1 is installed at. That is, the cylinder &4 is fixed on this horizontal plate lB, and the tip of the cylinder @LS of this cylinder 14 is connected to the fixed guide shaft 11 and the auxiliary guide shaft 12.
As a guide, the upper and lower sliding openings are connected to the upper plate 16 which can be moved.

In addition, on the upper and lower plates 16, a receiving rotating machine $2 and a screw-in rotating mechanism 8 are installed at symmetrical positions with respect to the entire center of the fixed guide shaft 11.The receiving rotating mechanism 2 #i, 1IiI is set on the same axis as the portom described in 1IiI. It is installed in a position with
A rotating cylinder 18 is attached to a platen 17 fixed on the upper and lower plates 16, and a gear 20 with a long tooth width is fixed to the rotating shaft 19 of the rotating cylinder 18. Further, a rotating shaft 21 is provided that penetrates the upper and lower plates 16 and is slidable and rotatable in the vertical direction.
A gear 3+2 is cut on the upper end flange portion of this rotating shaft 21, and is meshed with the =U gear wheel 20 and O teeth. Further rotation @21
The spring receiver 2B is assembled on the F side of the spring, and the compression spring 24 is inserted between the upper and lower plates 16. Therefore, the rotation 111121 is always urged downward (FIG. 2) by the pressure IkIJ spring 24, and the lower surface of the flange of the gear 22 comes into contact with the upper and lower plates 16, and also serves as a stopper for determining the lower limit of the rotation shaft 21. A hexagonal hole 25 having a hexagonal shape is provided in the lower end of the rotating shaft 21. On the other hand, at a position symmetrical to the rotating shaft 21 with the screw-in rotating machine asVi fixed guide shaft 11 as the center,
Also, the bolt assembly of the previous Wi2 assembly part B is installed at a position that has the same axis as the position, and the rotation axis 2 of the nut runner 26 that passes through the upper and lower plates 16 and is fixed.
A bottle 28 is inserted through the rotary tool 7, and the bottle 28 is loosely inserted into the elongated hole 8G of the rotary tool 29. In addition, a compression spring si is inserted between the lower end surface of the nut runner 1!6 and the upper end surface of the rotating tool 29, so that the tool is always rotating! 9 is biased downward. Further, at the lower end of the rotary tool 29 is a hexagonal hole a1 having the same shape as the hexagonal hole 26! be recessed. Further, below the upper and lower plates 16, a rotary plate 38 is suspended from the upper and lower parts &16 so as to be vertically slidable and rotatable about the identification guide shaft 1.1, and a bolt holder #44 is installed on the rotary plate 38. That is, a cylindrical body s4 having seven lunges is inserted into the fixed guide shaft 11 through the upper and lower plates 16, the flange portion of the cylindrical body 84 is fixed to the upper and lower plates 16, and the lower end of the cylindrical body 84 is The suspension ring 86 is fixed. And, between the hanging ring s5 and the upper and lower plates 16, the clamping ring 87 is inserted through the bearings 86 and 86.
The tCC is rotatably held on the outer periphery of the cylindrical body s4, and the flange part and the sliding part 8 are attached to the fixed guide shaft 11 for vertical sliding and rotation.
The upper end of the rotary body 89 having a rotation body 89 and the holding ring holder 7 are attached as one piece and integrated. Also, the lower end A of the rotating body 89! A retaining ring 40 having an outer diameter larger than the outer diameter of the cm moving part s8 is fixed. 41 is a bearing metal provided between the fixed guide shaft 11 and the rotating body 89.

Further, an engaging body 42 having a flange portion that can only slide vertically with the rotary body 89 is attached to the outer periphery of the sliding portion 88 using a guide key 46. A compression spring 46 is inserted between the spring receiver 44 recessed in the
'5r charge.

By this compression spring 45, the engagement body 42'ft is engaged with the body ring 40. Also, a gear part 47 is cut into the flange part of the rotating body 89 and installed on the upper and lower plates 16. The rotary drive mechanism 5 rotates the rotary plate 88 via the rotary body 89. That is, the rotary cylinder 48 is attached to the upper and lower plates 16, and the rotary shaft 49 of the rotary cylinder 48 passing through the upper and lower plates 16 is attached to the intermediate plate 88. The shaft 60 is mounted non-rotatably via a key, and the gear 61 is non-rotatably installed at the tip of the intermediate @5G via the key. The rotation causes the rotating plate am to rotate via the rotating body 89.

In this embodiment, a rotary cylinder and a set of gears are used as the rotary drive mechanism, but the present invention is not limited to this, and a rotary drive mechanism such as a rack and a pinion may be used. Bolt holding mechanism 4 rotates *88VCt
1: An arbitrary number of guide shafts can be installed, but in this embodiment, two guide shafts are installed at symmetrical positions with the fixed guide shaft 11 as the center. In other words, the two bolt holding supports 1i14 are installed at symmetrical positions with the fixed guide shaft 11 as the center. When assembling the bolts of assembly part B, rotate plate 8 at the same axis position as the axis of position.
Set it at 8. This bolt holding mechanism 4 is vertically slidable and rotatable on the internal sliding surface of a hollow sliding holding body 52' that passes through the rotating plate 3B and is fixed to the rotating plate 88 at its flange portion in the vertical direction. It is composed of a sliding rod 5s. And it is splashed on the top of this sliding rod SS 4
is provided, and a compression spring 5b is inserted between it and the rotary plate 8s.

The elastic force of the compression spring 66 is weaker than that of the compression spring 24 and the compression spring St. Further down the sliding rod [Fi lock 4! Install l1as protrudingly. Therefore, the sliding rod 68 is always urged upward (FIG. 2), and the locking screw 56 comes into contact with the sliding holder 62. Further, a hexagonal hole 68 having a hexagonal shape into which the head of Pole A can fit is provided in the lower end surface of the slide #I68, and a magnet 59 is buried in the bottom of the hexagonal hole b8. On the other hand, at the -E end of the sliding rod 68,
A hexagonal column 67, which can house animals, protrudes from the hexagonal holes 26 and 82. Note that 6O is a parts holder protruding from the ninth rotary plate SS for fixing the assembled parts when screwing in bolts.The present invention will be explained with reference to an embodiment having the above structure, and its operation will be explained below. First, the bolt positioning mechanism holds the bolt in a predetermined position. At this point, the cylinder 14 starts operating, and the cylinder axis IS moves the upper and lower plates 1
6 starts descending. As the upper and lower plates 16 descend, the cylindrical body s4 also descends, so that on the outside of the cylindrical body 14, the upper and lower plates 1 and 8 clamping rings held by the hanging ring II form one body. The rotating body s9 also descends. As a result, the engaging body 4 is pressed by the action of the compression spring 4s! The rotary plate ss fixed to the engaging body 4 = is also lowered at the same time.The lowering of the rotary plate am is stopped when the component holder SO provided on the rotary plate am comes into contact with the assembly part BK. Since the upper and lower plates 16 are pushed and lowered by the operation JM&C of 14, the compression spring 45 is compressed, and the sliding portion SS of the rotating weight 9 continues to slide on the inner diameter of the engaging body 42 under the guidance of the guide key 46. descend. Upper and lower plates 16
As the rotation axis 21 installed on the upper and lower plates 16 descends, the rotation s! The lower end surface of the sliding rod 58 comes into contact with the upper surface of the rotating plate 5I, and the sliding rod 5I stops descending.
It is placed on the internal sliding surface of the sliding holder 52 provided in the holder and lowered while compressing the compression spring 6b. Then, the lower end surface of the sliding rod 63 that descends comes into contact with the upper end of the head of the bolt which is held in position, and sliding -5s stops, but as the upper and lower plates 111 further descend from there, the compression spring 24 is compressed. When the rotation @21 moves upward by a set amount with respect to the upper and lower plates 16, the operation of the cylinder 14 is stopped, and the upper and lower plates 16
stops descending. Then, the rotary cylinder 18 starts to operate, causing the rotary shaft 19 of the rotary cylinder 18 to rotate. Therefore, the rotating shaft 21 rotates via the gear 20 attached to the rotating shaft 19 and the gear part 22 that meshes with the gear 20. Due to the plane rotation movement of this rotation 11121, it moves below the rotating shaft 21 (the recessed hexagonal hole 2
When the shapes of the five hexagonal columns protruding from the upper end of the sliding rod 6s match each other, the five hexagonal columns are inserted into the hexagonal hole 2fhK by the elastic force of the compression spring 24. By fitting, the rotating shaft 19 of the rotating cylinder 8 rotates like a gear! It is transmitted to the sliding rod IsI via O1 rotation @21t-. Then, due to the rotation of the sliding rod 5s, when the hexagonal shape of the lower part of the sliding rod ■ (the recessed hexagonal hole is and the head of the portom) match, the elastic force of the compression spring ! By inserting the head of Portom into this hexagonal hole 6s, the upper end of the head of Portom is connected to the sliding rod 5j.
[ji! The installed magnet 1sIc will come into contact with it, and the pole A will be held under the sliding rod 5s by its attractive force. After the above operation, the cylinder 4 draws the cylinder shaft 16 in the opposite direction. Therefore, the upper and lower plates 111Fi fixed guide shaft attached to the cylinder shaft tS! !
and the auxiliary guide shaft WC guides it up. As the upper and lower plates 16 rise, the rotating fine snow l of the receiving rotary machine 1112 installed on the upper and lower plates 16 is caused by the action of the compression spring 24, so that the lower surface of the gear 22 moves to the upper and lower plates ss&cI&L, and then the upper and lower plates 1
It rises with 6. Furthermore, as the rotating shaft 1 moves up, the sliding rod 58 also rises while attracting the head of Portom to the hexagonal hole 68 by the attraction force of the magnet SS due to the action of the compression spring 66, and the locking row 56 slides. It comes into contact with the holding body 6t and stops rising. As the upper and lower plates 1@ rise further, the rotating shaft 21 also rises, and the hexagonal hole 2S of the rotating shaft z1 and the sliding rod S
The six hexagonal columns at the upper end of a are disengaged. Furthermore, by further raising the upper and lower plates 16, the upper and lower plates l@
The retaining ring 40 is connected via the cylindrical weight 4 and the rotary body 9 provided in the
rises. Therefore, the engaging body 4 is fixed to the rotating plate II having the component presser 60 which was pressing the assembled component B by the action of the compression spring 4S! The engagement ring 40 comes into contact with the
The upper and lower plates 16 and the rotary plate am rise together and are fixed at a predetermined position. Simultaneously with the vertical movement of the upper and lower plates 16, the screwing rotation mechanism 3 screws the bolt A held by the bolt holding mechanism 4 into the bolt receiving hole of the assembly part B, which will be described later. Said is rotated. That is, the rotation of the rotary cylinder 48 causes the four gear parts to rotate via its rotating shaft 49, intermediate shaft so, and gear %1, and the rotation of this wheel s4y also causes the rotating body SS and the guide key to be fixed. The respective bolt holding mechanisms 4 provided at symmetrical positions with respect to the guide shaft 11 are respectively moved to opposite positions. Then, the cylinder shaft 1b lowers the upper and lower plates 16 again by the cylinder 14, so that the rotary plate 31 releases the compression spring 4.
It descends together with the upper and lower plates 16 due to the action of s. (At the same time, for the next process of assembly part B, the receiving rotary machine AT causes other bolt holding mechanism numbers to receive the portom.) Due to this lowering, the rejected item holder @e is moved to the assembly part. BK comes into contact with the rotating plate SS, and the descending movement of the rotating plate SS stops.◎However, the upper and lower plates 16 are further pushed and lowered by the action of the cylinder 14. Therefore, the engaging body 42 fixed to the rotating plate 88
The rotating body 89 descends by sliding on the inner diameter of the cylinder, compressing the compression spring 45, and lowering the upper and lower plates 16 including the cylindrical body 84 and the rotating body 89.
i;i Continue descending. As a result, the co-rotating tool 29 of the screw-in rotation mechanism 8 installed on the upper and lower plates 16 is moved by the sliding rod 58.
A sliding rod 61i contacts a hexagonal column 57 protruding from the upper end;
i It slides on the inner diameter of the sliding holder 52 fixed to the rotary plate 88 that has stopped descending and descends while resisting the compression spring 55.

Therefore, the bolt whose head is fitted into the hexagonal hole 58 at the lower end of the descending sliding member 4$511 enters the bolt mounting hole of the assembly part B, and the lower end of the bolt comes into contact with the threaded part of the bolt mounting hole and slides. The moving rod 68 stops descending. However, as the upper and lower plates 16 further descend, the compression spring 81 is compressed, and after the upper and lower plates 16 descend to the set position, the operation of the cylinder 14 is stopped. Then screw in and rotate m
The nut runner 26 of the mechanism 8 starts operating, and the rotation of the rotating shaft 27 is transmitted to the rotating tool 29. When the rotary tool 29 rotates, the hexagonal hole s2 recessed in the lower end of the rotary tool 29 and the hexagonal column 57 protruding from the upper end of the sliding rod Isa match, and compression is achieved. spring 8
It is charged with a force of 1. By fitting the hexagonal column b7 into the hexagonal hole 82, the rotation of the two rotating shafts of the nut runner 26 is transmitted to the sliding rod 58 via the rotating tool 29.

The portom, which has a head held by the attraction force of a magnet 59 in a hexagonal hole 58 recessed in the lower end of the sliding rod 68, is rotated by the rotation of the sliding rod 68 to open the bolt mounting hole of the assembly part B. Screwed into the threaded part.

When this bolt tightening work is completed (at this time, the operation of the bolt holding mechanism 4 receiving the portom by the receiving rotation mechanism 2 is completed), the cylinder shaft 16 fixedly guides the upper and lower plates 16 by the operation of the cylinder 14. It is placed on the shaft 11 and the auxiliary guide shaft 12 and raised. As the upper and lower plates 16 rise, the screw-rotating *SS installed on the upper and lower plates l@
The rotating shaft 27 of the rotary tool 2g is raised and is held through a long hole 80 by a pin 28 inserted through the rotating shaft 27.
will also rise. Furthermore, as the rotary tool 29 rises, the sliding rod 61 having the hexagonal column 57 that fits into the hexagonal hole 12 also rises due to the action of the compression spring 65. At this time, the hexagonal hole formed in the lower end of the sliding rod S8 After finishing the screwing work from 58, the head of POL A is removed. On the lower surface of the sliding holder 52 fixed to the rotary plate SS as the sliding rod b8 rises,
The locking collar 66 protruding from the sliding rod 58 comes into contact with the sliding rod 6s.
stops rising. Further, as the upper and lower plates 16 rise, the engagement between the hexagonal column 5 protruding from the upper end of the sliding rod 3 is disengaged from the 61-hole s2 recessed in the rotary tool 29. Further, as the upper and lower plates 16 rise further, the engagement body 4 is moved by the retaining ring 40 fixed to the lower end of the rotating body s9, which is fixed to the cylindrical body s4 fixed to the upper and lower plates 16! In the state in which 1 is being pulled up, the upper and lower plates 16 and the rotary plate $1 are raised together. Then, it rises to the Wr foot position and stops the operation of cylinder 14ti.

By repeating the above operations, it becomes possible to sequentially screw the portoms into the bolt mounting holes of the assembly part B that is sent to a predetermined position by a conveyor such as a belt conveyor. Now, the work of transporting and screwing bolts into assembled parts, which was difficult to automate, can be carried out automatically and continuously from the bolt transport/positioning position, and the bolts are transferred to the screwing position with the bolts removed. Then, the screwing operation is performed on the assembled parts in that state. Further, since the device of the present invention can be easily attached as an accessory device to automatic assembly machines, special processing machines, etc., it has the advantage of being used as an applied device in various machines and devices. In this embodiment, two bolt holding mechanisms to be attached to the rotary plate were installed symmetrically with respect to the fixed guide axis, but they may also be installed in one piece (Fig. 6). Depending on the location, multiple bolt retaining mechanisms may be installed (Fig. 6).
In the sectional view of FIG. 11, diagrams O S and O 6 show the cases of the other embodiments described above.

[Brief explanation of drawings]

FIG. 1 is an overall schematic diagram of an embodiment of the device of the present invention, and FIG.
The figure is a cross-sectional view of the main part, Figure 1 is an explanatory diagram of the rotary drive part, Figure 4 is a cross-sectional view of the rotor 11, and Figures 6 and 6 show other embodiments. 1... Vertical mechanism 2... Receiving rotation mechanism 8.
...Screw-in rotation mechanism 4...Bolt holding mechanism 6...
Rotation drive mechanism 1t... Fixed guide shaft 16... φ upper and lower plates 21... Rotating shaft 29, fist, rotating tool
88... Rotating plate 5s... Sliding rod Patent applicant Asahi Seiki Kogyo Co., Ltd. 3j; 4 "1 11 53 ノ

Claims (1)

[Scope of Claims] l) Upper and lower plates movable up and down on a fixed guide shaft; a vertical mechanism for moving the upper and lower plates up and down; suspended on the upper and lower plates and movable up and down and rotatable with respect to the fixed guide shaft; a rotary plate; a rotary drive mechanism for rotating the rotary plate; a sliding rod capable of sliding and rotating in a direction perpendicular to the rotary plate; and a rotating shaft capable of sliding and rotating in a direction perpendicular to the upper and lower plates. and the rotating sole are installed in symmetrical positions about the fixed guide shaft and on the center of the shelf of the sliding rod; by the vertical movement of the upper F plate, the rotating shaft, the sliding rod, the rotating sole and the sliding rod are The bolt is held at the tip of the sliding rod by the rotation of the rotating shaft, and the bolt is rotated and held in the held position.
A bolt assembly method characterized by rotating and transferring the bolt, and screwing in the bolt held at the tip of the sliding rod by the rotation of the rotating sole. 2) a top and bottom plate that is movable up and down relative to a fixed guide shaft; a vertical mechanism that moves the top and bottom plates up and down; a rotary plate that is suspended from the top and bottom board and that is rotatable up and down with respect to the fixed guide shaft;
A rotation drive mechanism for rotating the rotary plate: A bolt holding IFIk structure in which a sliding rod that can slide and rotate in a vertical direction is installed on the rotary plate, and a bolt can be held at the tip of the sliding rod:
A rotary shaft capable of sliding and rotating in the vertical direction is provided on the upper and lower plates at the same axis as the m moving rod, the rotary shaft and the sliding rod are engaged, and the sliding rod is rotated by rotation of the rotary shaft. A receiving and rotating mechanism that rotates and receives the bolt at the tip of the sliding rod: a rotating tool that can slide and rotate in a vertical direction on the upper and lower plates is provided at a position symmetrical to the rotating axis with the fixed guide shaft as the center; A rotary tool and the sliding rod are engaged, and the sliding rod is rotated by the rotation of the rotating tool, and the sliding target y is rotated.
@ vc A bolt assembly device that consists of a screw-in rotation mechanism that screws in the held bolt, and that the bolt held at the tip of the sliding rod is transferred in the held position and screwed in.