JPH0718503Y2 - Multi-axis screw tightening machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a multi-screw screw machine capable of adjusting a pitch interval between axes of a multi-screw screw machine.

[Prior Art] A multi-axis screw tightening machine developed for simultaneously tightening a plurality of tightened screws at the same time is well known, but in these multi-axis screw tightening machines, a multi-screw tightening device is provided on a fastened body. Since it is necessary to adjust the pitch interval of each screw tightener so as to correspond to the multi-axis of a large number of tightened screws, that is, the pitch interval,
The multi-axis screw tightening machine is configured so that the shaft pitch of each screw tightening machine can be adjusted.

However, the means for adjusting the pitch interval of each screw tightener in the conventional multi-axis screw tightening machine moves each of the screw tighteners individually to adjust the pitch interval of each screw tightener.
There is a method in which two screw tighteners are connected with a screw rod and the shaft pitch of both screw clamps is adjusted by rotating this screw rod, but the former screw mover is individually moved. In the case of adjustment, a great deal of time and effort is spent until the position adjustment of each screw tightener is completed, and workability is poor. Therefore, as a means for eliminating this drawback, for example, as disclosed in Japanese Utility Model Laid-Open No. 58-150435, there is a multi-screw screw tightener capable of adjusting the pitch interval between the respective axes in the multi-screw screw tightener. It is known.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional pitch interval adjusting mechanism, a plurality of nut runners are arranged in parallel with each other, and nut runners supported by a frame such that their respective axial cores can be closely spaced from each other via parallel links. A cylinder that is attached to the frame and is connected to each of the nut runners through a joint and that changes the pitch by changing the axial distance of the nut runner by expansion and contraction operation, and at least one of the cylinders has an axially facing surface that faces the nut runner body. And two stoppers that are mounted on the frame so as to be movable in the axial direction so as to come into contact with each other and regulate the positioning of the nut runner at a large pitch and a small pitch. The horizontal movement of each nutrunner is converted via the Of the nut runner is not smooth due to the movement of the nut runner, and it is required to increase the cylinder output for driving each nut runner, and since the stroke of the piston rod is required to be long, the cylinder is enlarged. There was a problem that it would end up.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional problems, and a plurality of movable plates for mounting a screw tightening machine are provided in a radial direction on a top surface of a horizontally positioned substrate. And a slidably supported multi-axis screw tightening machine, in which a disc parallel to the substrate is provided at the center of the upper surface of the substrate, and the disc and the movable plates are arranged in parallel with each other. The screw tightening machine held by each movable plate can be moved and adjusted in the radial direction by connecting the disk by means of appropriate driving means.
Therefore, according to this, since it is possible to smoothly and easily adjust the movement of the movable plate via the link by the rotating motion of the disk,
The drive means for rotating the disk is small and has a small capacity, and the overall shape of the screw tightener can be reduced.

[Embodiment] The present invention will be described in detail below based on an embodiment shown in the drawings.

Reference numeral 1 denotes a base plate of a multi-axis screw tightening machine, and a rotary rod 2 is erected and held at the center of the base plate 1. The upper end of the rotating rod 2 is rotatably supported by the receiving plate 3, and a rotary actuator 4 for rotating the rotating rod 2 is attached to the upper end of the rotating rod 2 and supported by the receiving plate 3. Has been done. A guide hole 5 is formed in the base plate 1 for moving the screw tightening machine in the radial direction about the rotary rod 2.
Is formed (in this embodiment, four guide holes 5 are provided). In each guide hole 5, the movable plate 7 mounted and supported by each screw tightening machine 6 moves in the radial direction. It is one that can be combined. A guide plate 8 also serves as a pressing plate for pressing the movable plate 7 against the substrate 1. A guide roller 9 for smoothing the movement of the movable plate 7 in the radial direction is attached to the guide plate 8. . Reference numeral 10 denotes a rotary table which is connected to the lower end of the rotary rod and is positioned in parallel with the substrate 1. Between the rotary table 10 and the movable plates 7, the rotary rod 2 is rotated. table
A link 11 for moving the movable plate 7 in the radial direction is connected via 10.

Further, as shown in FIG. 4, elongated shapes 16 are formed at both ends of the link 1, and the elongated holes 16 are provided to absorb the difference in the movement amount caused by the processing error of each screw tightening machine. The spring 14 and the pin 15 are engaged, and the horizontal link 11 thereof, the rotary table 10 and the movable plate 7 are connected.

Further, in the center of the substrate 1, there is a front stopper 12 which also serves as a guide plate for the rotary table 10 and which determines the front position of each movable plate 7, and behind the movable plate 7 there is a movable plate 7. A rear stopper 13 for rearward positioning is mounted on the substrate 1. The rear stopper 13 has a structure capable of changing the rear position of the movable plate 7. Note that
21 is a positioning pin for preventing the guide plate 8 from being displaced, 22
Is a screw tightening socket provided in the screw tightening machine 6, and 23 is a screw to be tightened located on the object to be tightened 24. The screw to be tightened 23 is tightened by the screw tightening socket 22. It is a thing.

The structure of the embodiment of the present invention has been described above. Next, the operation thereof will be described. When the rotary actuator 4 is rotated, the rotating rod 2 is rotated, and the rotating rod 2 is coupled to the lower end portion of the rotating rod 2 in accordance with this rotation. The rotating table that is being rotated also rotates. Since each movable plate 7 is moved in the radial direction via the link 11 as the rotary table 10 rotates,
The screw tightening socket 22 of each screw tightening machine 6 fixedly held by each movable plate 7 can be displaced in the radial direction,
As a result, the pitch of each screw tightener socket 22 can be adjusted in a variable manner, and each screw tightener 6 can be fixed in a fixed position for screw tightening work.

As described above, according to this embodiment, the pitch adjustment of a plurality of screw tightening machines (four in this embodiment) can be performed at once by operating the rotary actuator 4. Since the rotary table 10 and the movable plate 7 which are positioned parallel to the substrate 1 are connected to each other by the link 11 parallel to the substrate 1, the rotary power of the rotary table 10 is controlled by the movable plate 7. It is extremely easy to convert into a linear motion, and the movement adjustment of each movable plate 7, that is, the pitch adjustment of each screw tightener can be smoothly performed. In this embodiment, the rotary actuator 4 is used as the drive source of the rotary rod 2, but the drive source is not limited to this and may be electric or manual. In addition, each movable plate 7 has a movable plate 7
Since a stopper (positioning) 13 for stopping the screw at a fixed position is provided, by adjusting the position of this stopper, the pitch interval of each screw tightening machine becomes accurate. Further, in the above-described embodiment, four screw tightening machines are provided, but it is naturally possible to move four or more screw tightening machines at the same time to adjust each pitch.

Further, in this embodiment, the links 13 have the same length, but by making the lengths of the links different, a large number of screw tightening machines can be used even for tightened screws having different pitches in the thinning direction. It can also be displaced.

[Advantages of the Invention] As described above, according to the present invention, the fixed substrate 1, the rotating rod 2 supported in the central portion of the substrate 1 in the direction orthogonal to the substrate surface, and the substrate 1 are provided. Parallel to
A rotary table having the rotary rod 2 fixed to the center thereof
10, a plurality of movable plates 7 slidably supported on the upper surface of the base plate 1 in the radial direction about the rotary rod 2 and to which the respective screw tighteners 6 are attached, each movable plate 7 and the rotary table. A plurality of horizontal links 11 connecting the movable plate 7 and the movable plate 7 via a spring 14 for absorbing the movement amount difference of the movable plate, and the movable plate 7
Since it is a multi-axis screw tightening machine characterized by having a stopper 12 for regulating the moving position of the movable plate 7, the moving distance (pitch) of the movable plate 7 can be adjusted by adjusting the position of the stopper 12. Can be adjusted. Further, even if the movement distance of each movable plate 7 is changed by the stopper position adjustment, the change amount, that is, the difference in the movement amount of the movable plate 7 can be absorbed by the spring, so that the movement distance is changed by the operation of the rotary table 10. It is possible to obtain the effect that each movable plate (screw tightener) can be operated simultaneously.

[Brief description of drawings]

Each of the drawings shows an embodiment of a multi-axis screw tightening machine according to the present invention, FIG. 1 is a plan view thereof, FIG. 2 is a side view thereof, and FIG. 3 is a plan view showing its operating state, FIG. FIG. 6 is a plan view showing the engagement of the link with the rotary table and the movable plate. DESCRIPTION OF SYMBOLS 1 ... Substrate, 2 ... Rotating rod 3 ... Receiving plate 4 ... Rotary actuator 5 ... Guide hole, 6 ... Screw tightening machine 7 ... Movable plate, 8 ... Guide plate 9 ... Roller, 10 ... Rotating table 11 ... Link, 12 ... Front Stopper 13 ... Rear stopper, 14 ... Spring 15 ... Pin, 16 ... Oblong hole 21 ... Positioning pin, 22 ... Screw tightening socket 23 ... Tightening screw, 24 ... Tightening object

Claims (1)

[Scope of utility model registration request] 1. A substrate (1) which is fixed, a rotating rod (2) which is supported at a central portion of the substrate (1) in a direction orthogonal to the substrate surface, and the substrate (1). And a rotary table (10) which is fixed to the center of the rotary rod (2) and slides on the upper surface of the substrate (1) in a radial direction about the rotary rod (2). A plurality of movable plates (7) which are movably supported and to which the respective screw tighteners (6) are mounted, and each movable plate (7) and the rotary table (10) absorb the difference in movement amount of the movable plates. Springs for (14)
A multi-axis screw tightening machine, comprising: a plurality of horizontal links (11) connected through a stopper and a stopper (12) for restricting a moving position of a movable plate (7).