JPS60108276A - Screw holder for screwing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a screw holder for a screw tightening machine, and in particular, when the screw is rotated, the rotation between the head of the screw and the sleeve 7 that holds the This invention relates to a screw holder suitable for eliminating friction.

[The Mouse of Invention]

The conventional screw holder shown in this figure includes a housing 3 coupled to a screw tightening machine 1, a housing 3 connected to a rotating shaft 2 of the screw tightening machine 1, and supported by the housing 3 via bearings 5, 5.
The bit 6 is attached to the tip of the shaft 4 via the bit holding hole 7, the shaft 4 supported by the housing 3, and the bit holding ball 7 is attached to the tip of the shaft 4. The installed bit 6 and the outer circumference of the housing 3
This fits.

It also has a sleeve 8 attached so as to be slidable in the axial direction. The sleeve 81 has a vacuum chamber 10 and a vacuum supply port 11 provided in the front half of the sleeve 81 which is urged forward by a compression spring 9. 15' is designed to be vacuum-adsorbed.

In Fig. 1, reference numeral 12 indicates a seal member, 13 indicates a stopper for the sleeve, 14 indicates a slit, 16 indicates a workpiece, and 17 indicates a screw hole.

However, in the conventional screw holder, the sleeve 8 that holds the screw 15 is compressed by the compression spring 91 and the screw 1 is attached to the workpiece.
When the screw 5 rotates, rotational friction occurs between the sleeve 8 and the head 45' of the screw 15, and the screw 15 cannot be rotated smoothly 1C.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a screw holder for a screw tightening machine that can completely eliminate rotational friction between the screw and the sleeve that holds the screw when the screw is rotated.

[Summary of the invention]

A feature of the present invention is that a means is provided for moving the sleeve holding the screw in the direction away from the head of the screw when the screw is rotated by the screw.
As a result, we were able to reliably achieve the above objectives.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows a first embodiment of the present invention, and FIGS. 3 and 4 show its operation.

The embodiment shown in FIG.
A shaft 4 is connected to the shaft 4, a stone is attached to the tip of the shaft 4 via a bit holding ball 7, and a bit 6 is fitted to the outer periphery of the housing 3.

A sleeve 11-b 8 is attached so as to be slidable in the axial direction, and a front chamber 1 is formed in the front half side of the sleeve 8.
8 and z7. formed between the overlapping part of the housing 3 and Su-1-18. - a rear chamber 19, a vacuum chamber 20 formed between the front chamber 18 and the rear chamber 19, and a vacuum chamber 20 provided at the front end of the housing 3; In other words, it includes a switching member 23 for switching the rear chamber 19 into communication or non-communication, and a vacuum supply means 24.

The shaft 4 is supported within the housing 3 via bearings 5, 5.

The tube 8 has a twist screw 15 at its tip 8'l.
The head 15' of the head 15' is held in place. Also, S1
1-b 8 is urged forward toward the workpiece 16 by a compression spring 9 interposed in the rear chamber 19.

・Furthermore, the sleeve 8 has a stopper 13 provided in the housing 3 and a slit formed in the sleeve 8.
The advancing position and the rear-A position are regulated through fitting with n,
ing.

an overlapping portion between the housing 3 and the rear end of the sleeve 78;
When the switching member 23 on the wall between the rear chamber 19 and the vacuum chamber 20 moves forward, the part that overlaps with the switching member 23 and the wall of the front chamber 18 move forward.
Now, the seal member 12 is installed.

A passage 21 communicating with the atmosphere is formed in the front chamber 18.
A normally closed ball 22 is provided in this passage 20.

The rotor changing member 23 is held at the tip 8' of the sleeve 8, and until the external screw 15 faces the screw hole 17 of the workpiece 16, the front chamber]8 and the vacuum chamber 20 are communicated with each other and the sleeve 8 is screwed. 15 is vacuum-adsorbed, and when the bit 6 is half-fitted into the head 15' of the screw 15, it advances together with the housing 3 to cut off the front chamber 18♂ and the vacuum chamber 20, and the ball 2.2 Press to open passage 21,
Bit 6 is the head of screw 5 Kl 5',
When the τ bin 61r and 15 are rotated, the rear chamber 19 and the vacuum chamber 20 are brought into communication with C-.

The vacuum supply means 24 is connected to a vacuum supply port 25 provided in the vacuum chamber 20, and a port 26 connected to the vacuum supply port 25.
It has a vacuum generation source 27.

In this embodiment, the above-mentioned front chamber 18 and rear chamber 1 are
9, a ball 22, and a switching member 23 provided in the vacuum chamber 20 and one passage 21, separate the sleeve 8 from the head 15' of the screw 15 when the bit 6 rotates the screw 15. The screw holder of the first embodiment is used as follows.
l”1., acts.

In other words, when the tube 8 is at its most forward position relative to the housing 3 and the front chamber 18 and the vacuum chamber 20 are in communication, the screw 15 is inserted into the tip 8' of the tube 8. head 15
By fitting these and operating the vacuum supply means 24, the screw 15 is held in the stob 8 by full suction, as shown in FIG.

Next, after the end of the screw 15 faces the screw hole 17 of the workpiece 16, the screw tightening machine 1 is moved forward, and the screw 6 is inserted into the screw through the rotating shaft 2 and the shaft 3, which are stopped for one rotation. It advances toward the head 15' of the screw 15 and engages. Meanwhile, the switching part 23 provided with the housing 31 moves forward, and the human 6 partially inserts the screw 15θ) into the head 15'.
, P, as shown in FIG. 3, the front chamber 18 and the vacuum chamber 20 are cut off by the switching member 23, and
The pole 22 is connected to the pusher 1, the front chamber 18 communicates with the atmosphere through the passage 217i, and the rear chamber 19σ) air is connected to the tube 11 through the passage 217i.
The stones formed on the ground are released to the outside through the
Switch to do so.

Further, when the human 6 completely fits into the head 15' of the screw 15, 1. At one point in time, as shown in FIG. 4, the rear chamber 19 and the vacuum chamber 211 are communicated through the switching member 23i. Accordingly, as shown in Figure 4,
The shaft 11-78 moves in the backward direction until it is regulated by the stopper 13, and the tip 8' of the shaft 11-78 is fixed to the screw 15.
completely away from the head 15'.

In this state, the rotating shaft 2 of the screw tightening lock 1 is driven, the weight 4 is lifted, the bit 6 is rotated, and the screw 5 is screwed into the screw hole 17 of the workpiece 6. At this point, as mentioned above, the tip 8' of the tube 1-8 is connected to the head 15 of the screw 5.
The sleeve 8 and screw 15 are completely separated from each other.
The screw 15 can be screwed in smoothly with three forces without any rotational friction occurring between them.

Next, FIG. 5 shows a second o) embodiment of the present invention.

In this embodiment, a pitch h6ic
The sleeve 8 constitutes a means for moving the sleeve 8 in a direction away from the head of the screw when the screw rotates. Said I+
The Mitsutoshi switch 29 is fixed to the Hawazinc 3 with a bracket 28! This mounting line 9 is located at a position 17 where it can come into contact with the rear end surface of the strip 1-b 8 L7. The air pressure supply device 31 supplies air to the housing 3 through the air pressure supply port 32 in response to control signals from the control device 13 (17) and others.
and tube 11 - formed in the N section of block 8 rl, T - rear chamber 19
It is designed to send air pressure to. In addition, Sub11-B8
Inside) First half IC @Narifu n.

Front chamber J81 moss, compression spring 9, and tube 11-bu 80)
A vacuum supply port 25 for vacuum suctioning the head of the screw is provided at the tip 8'.

In this second embodiment, when holding the screw, the bit 6
At this point, the head of the screw should be fully seated.

When the limit switch 29 comes into contact with the rear end surface of the sleeve 8, it is turned ON! From this, a control signal is transmitted from the control device 30 to the air pressure supply device 31, and air pressure is supplied from the air pressure supply device 31 through the air supply port 32, and from this air pressure ζ, the valve 8 is retracted, and its tip is The portion 8' is spaced apart from the head of the screw.

Note that 0) 201st Embodiment 1) Other functions of the structure 1 are the same as those of the first embodiment.

Next, FIG. 6 shows an embodiment of the brush 3 (invented in this invention).

In this actual sister example, there is a hole on the rear end surface of block 8.
The edges tl and f are connected to the magnetic body 33 and the housing 3,
When rotating the electromagnet 34 and the limit switch 36, the three 7'8 are screwed in the direction ζ away from the head.
This movement is made up of 1.7 stages. The magnetic body 3
3 is attached when the tube 11-8 is formed of a non-curved body. The limit switch 36 is
It is fixed to the housing 3 and is attached to the rear end 35, and the sleeve 8θ) is placed in a position where it can come into contact with the rear end I. Is the control 4 mount 37 connected to the 11 minute switch 361? Complete stone 1, this system? Wholesale suit 21
C' (7 has a power supply 38 connected to the tongue 1, this power supply 3
An electromagnet 34 is connected to the magnet 8.

Then, when the bit 6 is completely pushed into the head of the screw with this bay 3θ) positive example force screw holder, the switch 36 is turned ON by the switch 11-b8. "jl
This causes the control device 37 to send power (w, control U to the device 38).
(No. h or send n, the electromagnet 34 by the original device 38
is excited, the magnetic body 33 is attracted, and the sleeve 11-8 is moved in the backward direction.1.
The tip 8' of the swivel 8 has separated from the head of the screw.

I'm staggering.

? , -$l 74) Gradient T +Inva4k(El11/
7r) Yurha wb> ttcmlr-i Then, the above-mentioned 1. The same is true for the second sister case.

In addition, in the present invention I, when the bit 6 is rotated,
The means for moving the screw 1-78 away from the head of the screw (2) is not limited to the embodiment shown in FIG.

1゛Effects of the Invention〕According to the described invention, the screw is rotated by means of a bit. Therefore, it is possible to completely eliminate rotational friction between the three 7 and the screw.

This has the effect of allowing the screw to rotate smoothly and being screwed in.

Figure 1 is a vertical cross-sectional view showing a conventional screw holder for a screw tightening machine, and Figure 2 is a vertical cross-sectional view showing a first embodiment of the present invention.
, 3 and 4 are vertical views showing the same operating state.
The stone in Figure 5 and the stone in Figure 6 are the 2nd and 30th fruits of the present invention! A σ
It is a longitudinal cross-sectional view showing an example.

J...Screw tightener, 2...Rotating shaft, 3...Housing, 4...Shaft, 6...=Bit% 8...Sleeve, 8""4'l-b tip qHB, 9... σ) compression spring for sub 1-b advancement, 13... stopper for sub I-b, 15... screw, 15'... head of screw, 16...
...Work, 17...Screw hole, 18...Sue 1-"/
q) Front chamber, 19... rear chamber, 2o... vacuum chamber,
23...Communicate between the vacuum chamber and the front or rear chamber.
is a switching member for switching non-communicating EC, 24...
・J ~ Soku Koku Sensai 29...+1 Mituto Switch, 3
0...Control device for the air pressure supply device, 31...Pneumatic pressure supply 4 wire 33...Sleeve attachment point magnetic material, 34...Gallery attached to the housing, electromagnet,
36...+1 Mitsutwitch, 37... Control device for power supply device, : (8... Power supply device.

Figure 1 Figure 2

Claims (1)

[Claims] a housing coupled to a screw tightening machine, a shaft connected to a rotating shaft of the screw tightening machine and supported by the housing, a bit attached to the tip of the shaft, and the housing. In the screw holder, the screw holder includes a sleeve for holding the head of the screw at the tip thereof, and a sleeve for holding the head of the screw at the tip thereof, when the screw is rotated by the bit, the screw holder is slidably attached to the screw.
A screw holder for a screw tightening machine, characterized in that the screw holder is provided with means for moving the screw in a direction away from the head of the screw.