JPH0432184Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The disclosed technology, when performing tightening work on a tightening member such as a bolt or nut using a nut runner, allows the tightening member to be attached to the nut runner in synchronization with the tightening operation of the nut runner. It belongs to the technical field of the structure of a feeding device that sequentially feeds one item at a time.

Therefore, this invention is equipped with a component supply hose that connects the parts feeder and the nut runner, and through the component supply hose, tightening members such as bolts or nuts are sequentially passed from the parts feeder to the component tightening section of the nut runner one by one. This invention relates to a device for supplying tightening members to a nut runner, and in particular, the member supply hose is divided midway into a supply hose on the parts feeder side and a supply hose on the nut runner side, and the supply hose on the parts feeder side is The hose is held on a fixed base,
Further, the supply hose on the nut runner side is held by a supply receiving base that is integrated with the nut runner, and furthermore, positioning parts are provided on the fixed base and the supply receiving base, and the fixed base and the supply receiving base are connected to each other via the positioning parts. The supply hose on the parts feeder side and the supply hose on the nut runner side are connected, and the supply receiving base is separated from the fixed base so that the tightening member can be tightened by the nut runner, and the bolt is attached to the bracket provided on the fixed base. A device for supplying tightening members to a nut runner, in which a component receiving box provided at the tip of the rod is provided with a bullet interposed between it and the bracket so that it can freely come into contact with and separate from a supply receiving base. It is.

<Conventional technology> In general, bolts and
For tightening of tightening members such as nuts, a nut runner is used to tighten the tightening members such as bolts and nuts to a constant tightening torque in an extremely short period of time.

In addition, when there are many tightening parts of bolts, nuts, etc. on one workpiece, a nut runner having multiple tightening shafts is used to improve work efficiency. Increasingly, devices equipped with a supply device for tightening members are being used.

It is desired that the tightening member supply device can supply the member accurately and quickly, and recently, research and improvement have been actively conducted for this purpose. It is disclosed in Publication No. 56-3154, Publication No. 56-114674, etc.

Therefore, when performing tightening work on tightening members such as bolts and nuts for workpieces conveyed on a line, so-called hanging nut runners are often employed; It is suspended from the ceiling of a factory, etc. so that it can be transferred in synchronization with the assembly line, and the tightening members fed from the parts feeder are supplied to each tightening shaft via the parts supply hose to tighten the workpieces transported on the line. Components can be installed efficiently.

<Problem to be solved by the invention> However, since the nut runner's tightening shaft is connected to the parts feeder via the parts supply hose, the nut runner has multiple tightening shafts, so the line When the tightening member is tightened on the work being transported by the machine, there is a problem in that the component supply hose interferes with the tightening member, making it difficult to operate.Furthermore, there is a problem in that the visibility of the line becomes poor.

Additionally, since the nut runner and parts feeder are usually integrated via a parts supply hose, it is difficult to quickly detect equipment abnormalities such as when a tightening member gets caught in the supply route from the parts feeder to the nut runner. It was hot.

Furthermore, for example, in the case of a tightening member supply device as proposed in Japanese Utility Model Application No. 60-172668, there is a risk that if the timing of supplying the tightening members is unexpectedly shifted, the tightening members may be scattered around. .

The purpose of this invention is to solve the technical problem of supplying tightened parts from the parts feeder to the nut runner based on the above-mentioned conventional technology, and to simplify the arrangement structure of the parts supply hose to the nut runner to improve the operability and maintainability of the nut runner. It is an object of the present invention to provide an excellent apparatus for supplying tightening members to a nut runner, which is useful in the application field of parts assembly technology in the machine manufacturing industry.

<Means for Solving the Problems> In accordance with the above-mentioned purpose, the structure of this invention, which is summarized in the scope of the above-mentioned utility model registration claims, is to solve the above-mentioned problems by supplying parts to feed the tightening members from the parts feeder to the nut runner. In a tightening member supply device for a nut runner equipped with a hose, the component supply hose is divided into a parts feeder side supply hose and a nut runner side supply hose, and the divided end faces of each can be joined and separated, and the parts feeder side supply hose is attached to a fixed base. The nut runner side supply hose is held by a supply receiving base provided integrally with the nut runner, a positioning portion is provided on the fixed base and the supply receiving base, and the rod can move forward and backward through a bracket on the fixed base. A technical measure has been taken in which a bullet is interposed between the component receiving box provided on the rod and the bracket so that it can come into contact with and separate from the supply receiving base.

<Function> Thus, the parts supply hose that feeds the tightening member from the parts feeder to the nut runner is divided into the parts feeder side supply hose and the nut runner side supply hose from the middle, and the parts feeder side supply hose is held on the fixed base. , the nut runner side supply hose is held by a supply receiving base provided integrally with the nut runner, and further, a positioning portion is provided on the fixed base and the supply receiving base to connect and separate the ends of each hose,
When the nut runner is in a standby state, the supply receiving base is linked to the fixed base via the positioning part, the nut runner side supply hose and the parts feeder side supply hose are connected, and in this state, the tightening member is inserted from the parts feeder to the nut runner side supply hose. When the nut runner is fed and filled, and then the nut runner is operated, the supply receiving base is separated from the fixed base, the parts feeder side supply hose and the nut runner side supply hose are separated, and in this state, the nut runner tightens the tightening member. This is so that even if the tightening members are accidentally released during the separation, they are immediately received in the parts receiving box and are not scattered around.

<Example> Next, an example of this invention will be described below based on the drawings.

Reference numeral 1 denotes a tightening member supply device, which is the central point of this invention, and is used when tightening members such as bolts or nuts using a multi-axis nut runner 2 on a workpiece conveyed on a line. In this case, tightening members are sequentially fed to each tightening shaft of the nut runner 2 from a parts feeder (not shown) in synchronization with the tightening operation of the nut runner 2.

Reference numeral 3 designates a fixed base, one side of which is formed in a rectangular shape is supported and fixed to an I-shaped beam 4 suspended from the ceiling, and an angular bracket 5 is fixedly connected to the adjacent side. ing.

A plurality of holes 6 are arranged in a set matrix and drilled in the fixed base 3, and each hole 6 has a contracted tip of a parts feeder side supply hose 7 connected to a parts feeder (not shown). A pair of notches are provided at a predetermined distance from each other on the opposite side of the fixed base 3 to the side where the bracket 5 is joined. A guide bush 9, 9 having a notch running in the vertical direction on one side is fitted and fixed to the part.

Furthermore, a pair of positioning guide bushes 10 are provided on the lower surface of the fixed base 3 at a predetermined distance from each other.
A rod guide 11 is attached to the vertical surface of the bracket 5. A rod 12 communicating with the vertical surface of the bracket 5 is slidably held in the rod guide 11. A component receiving box 13 is supported and fixed at the end, and a compression spring 14 mounted on the rod 12 is interposed between the component receiving box 13 and the inner vertical surface of the bracket 5.

A flange 15 is attached to the outer end of the rod 12.
are integrally formed, and when no external force is applied to the component receiving box 13 at the tip of the rod 12, the elastic force of the compression spring 14 causes the flange 15 to
is in contact with the end face of the rod guide 11, and the rod 1
2 and the parts receiving box 13 as shown in FIG.
When the rod 12 and the component receiving box 13 are maintained in an inwardly protruding state and an external force is applied to the component receiving box 13, as shown in FIG. It is made to retreat outwardly against the

Reference numeral 16 denotes a supply receiving base, which is supported by a piston rod 18 of an elevating cylinder 17 and can be raised and lowered freely. The supply receiving base 16 is moved together with a nut runner 2 (not shown) that attaches a tightening member to a workpiece.

The error absorbing section 20 has exactly the same mechanism as the mechanism by which the component receiving box 13 is held by the bracket 5, and the relative position between the supply receiving base 16 and the nut runner 2 is corrected via the compression spring 14'. It's like that.

The supply receiving base 16 has a plurality of similar holes 2 at positions corresponding to the holes 6 of the fixed base 3.
1... are bored in each hole 21, and the tip of a nut runner side supply hose 22... connected to a tightening shaft (not shown) of the nut runner 2 is fitted and fixed through an enlarged diameter socket 23... In addition, there are guide bushes 99 at positions corresponding to the guide bushes 9 of the fixed base 3 of the supply receiving base 16.
A pair of guide rods 24, 24 that fit into the positioning bushes 10, 1 of the fixed base 3 are installed upright.
A pair of tapered positioning pins 25, 25 are erected at the position corresponding to 0.

Further, a fixed position limit switch (not shown) is attached to the supply receiving base 16, and when the nut runner 2 and the supply receiving base 16 are brought close to the fixed base 3 and set in the fixed position, the lifting cylinder 17 is activated. A rising end limit switch (not shown) is attached to the fixed base 3, so that when the supply receiving base 16 rises via the lifting cylinder 17 and reaches the rising end, the parts feeder is activated.

In the above-described configuration, when the nut runner 2 tightens a tightening member such as a bolt or a nut, the nut runner 2 is first moved along with the supply receiving base 16 via a moving device (not shown) as shown in FIG. It is moved in the horizontal direction, and the tip of the supply receiving base 16 comes into contact with the parts receiving box 13 and pushes the parts receiving box 13 backward (towards the right in the figure) against the elastic force of the compression spring 14. , In that state, the nut runner 2 and the supply receiving base 1
6 is brought close to the fixed base 3 in a predetermined manner, and the pair of guide rods 24, 24 of the supply receiving base 16 are engaged with the guide bushes 9, 9 of the fixed base 3, so that the nut runner 2, Then, the horizontal movement of the supply receiving base 16 is stopped and set at a predetermined position.

When the nut runner 2 and the supply receiving base 16 are set in the fixed position in this way, a fixed position limit switch (not shown) is activated, and thereby the lifting cylinder 17 extends the piston 2 rod 18 upward. to raise the supply and receiving base 16.

When the supply receiving base 16 rises by a predetermined amount, the positioning pins 25, 25 on the upper surface of the supply receiving base 16 fit into the positioning bushes 10, 10 on the lower surface of the fixed base 3 via the tapered outer circumferential surface of the tip. Accordingly, the diameter-reducing sockets 8 on the lower surface of the fixed base 3 are fitted and connected to the diameter-expanding sockets 23 on the upper surface of the supply receiving base 16, and the parts feeder-side supply hose 7 and the nut runner-side supply hose 22 are connected. are now connected in communication.

Note that when the positioning pins 25, 25 and the positioning bushes 10, 10 are engaged, the supply/reception base 16 is supported by the nut runner 2 through the error absorbing part 20 so as to be able to be slightly displaced. As it advances, the position of the supply receiving base 16 is precisely corrected, thereby ensuring that the enlarged diameter socket 2
3 and the diameter reducing socket 8... are securely fitted and connected.

Then, when the supply receiving base 16 reaches a preset rising end, a rising end limit switch (not shown) is activated, the air shunter of the parts feeder connected to the rising end limit switch is activated, and the parts feeder side supply hose 7... A tightening member such as a bolt or a nut is fed to the nut runner supply hose 22 through the nut runner.

When a predetermined amount of the tightening member is fed from the parts feeder to the nut runner supply hose 22, the air shunter of the parts feeder is stopped.
The supply receiving base 16 is lowered via the lifting cylinder 17, and the parts feeder side supply hose 7... and the nut runner side supply hose 22 are separated. When the supply receiving base 16 reaches the lower end, the nut runner 2 moves the moving device (not shown). The clamping member is moved horizontally through the workpiece, and is transported to the tightening member attachment position of the workpiece being conveyed on the line.

Then, the supply receiving base 16 is the nut runner 2.
When the component receiving base 16 starts moving in the horizontal direction, the pressure on the component receiving box 13 is gradually released, and as a result, the component receiving box 1
3 is moved forward by the elastic force of the compression spring 14 and moved below the diameter reducing socket 8... on the lower surface of the fixed base 3, and comes into contact with the end of the supply base 16, and from the diameter reducing socket 8... If the tightening member is accidentally air-shunted, the tightening member is reliably received by the component receiving box 13 and is prevented from being scattered around.

In this way, when the nut runner 2 is transferred to the tightening member attachment position of the work being transported on the line, the nut runner 2 is in a state where it is disconnected from the parts feeder side supply hose 7...
The nut runner 2 has a simple structure, and as a result, the nut runner 2 can be easily handled by the operator.

It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments, and various other embodiments can be adopted.

<Effects of the invention> As described above, according to this invention, it is possible to simplify the arrangement of the material supply hose when operating the nut runner so as not to cause any hindrance to normal use. This has the excellent effect of greatly improving the operability and maintainability of the nut runner.

That is, the component supply hose that feeds tightening members such as bolts and nuts from the parts feeder to the nut runner is divided into a parts feeder side supply hose and a nut runner side supply hose, and the divided end surfaces can be connected and separated. As a result, after connecting the parts feeder side supply hose and the nut runner side supply hose and supplying and filling the nut runner side with the tightening member, the nut runner side supply hose can be disconnected from the parts feeder side supply hose, and the nut runner side supply hose can be connected to other equipment without having to route a long supply hose. The nut runner can be operated without interfering with other parts, and as a result, the nut runner can be operated easily, the visibility of the line during line work is also good, and the tightening member is not caught in the device. If an abnormality occurs, since the parts feeder and nut runner are separate from the parts supply hose, the abnormality can be detected early and appropriate measures can be taken.

Further, the parts feeder side supply hose is held on a fixed base, the nut runner side supply hose is held on a supply receiving base provided integrally with the nut runner, and positioning parts are provided on the fixed base and the supply receiving base. Not only can the parts feeder side supply hose and the nut runner side supply hose be separated, but also the parts feeder side supply hose and the nut runner side supply hose can be reliably joined by accurate engagement through the mutual positioning parts of the fixed base and the supply receiving base. Therefore, the nut runner can be used for normal use without being inferior to a conventional nut runner that is integrated with a component supply hose.

In addition, a rod can be freely moved forward and backward through a bracket on the fixed base side, a parts receiving box is provided at the tip of the rod, and an elastic device such as a spring is interposed between the rod and the bracket, and the parts receiving box is attached to the supply receiving base. By making it possible to freely come into contact with and release from the supply hose, even if the parts receiving box faces the supply hose on the side of the baht feeder and the tightening member is accidentally released, it will be received without any time delay when the supply hose is disconnected. , the excellent effect of not being scattered around is achieved.

Furthermore, even if the parts feeder breaks down, the component supply hose can be separated and the nut runner can be used independently, resulting in an excellent effect of improving the operating efficiency of the nut runner.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention,
Figures 1 and 4 are partially sectional front views, Figure 2 is a plan view,
FIG. 3 is a sectional view corresponding to FIG. 2. 2... Natsu runner, 7, 22... Part supply hose, 1... Tightening member supply device, 7... Parts feeder side supply hose, 22... Natsu runner side supply hose, 3... Fixed base, 16... Supply receiving base , 9, 10, 24, 25...positioning section, 5...bracket, 12...rod, 13...
...Parts receiving box.

Claims (1)

[Scope of utility model registration request] In a tightening member supply device for a nut runner, which is equipped with a member supply hose for feeding tightening members from a parts feeder to a nut runner, the member supply hose is divided into a parts feeder side supply hose and a nut runner side supply hose, and the divided end surfaces of the parts are joined. The supply hose on the parts feeder side is held on a fixed base, the supply hose on the nut runner side is held on a supply receiving base provided integrally with the nut runner, the fixed base and the supply receiving base are provided with positioning parts, and A rod is provided on the fixed base so as to be movable forward and backward via a bracket, and a component receiving box provided on the rod has a bullet interposed between it and the bracket so that it can come into contact with and separate from the supply receiving base. A tightening member supply device for a nut runner, characterized in that: