JPS59158732A - Screw pressure feeder - Google Patents

Abstract

PURPOSE:To make an instantaneous changeover of various screws attainable, by installing such a shutoff device as free of opening or closing in the midway of a screw feeding through hole installed in a base block, while supplying a screw with pressure air for screw pressure feed use when the screw reaches up to the bottom of the said hole. CONSTITUTION:In the state of an initial stage where a topper screw 8'' among aligned screws 8 in a row is situated on a screw receiving part 7 of a screw feed plate 4, when this screw feed plate 4 and a shutoff plate 9 are shifted to the left, the screw 8'' is separated from other screws 8 by means of a separation claw 5, and entered inside a screw feeding through hole 2 by way of a guide part 6. Simultaneously with this entry, a through hole 10 of the shutoff plate 9 is accorded with the said hole 2 whereby the screw 8'' being entered inside the hole 2 immediately drops down to the extent of a pressure feed hose 12. Next, both plates 4 and 9 are brought back to the initial position and simultaneously the screw 8'' inside the pressure feed hose 12 is fed forward by pressure to the pressure air fed in from a pressure feed air passage 11. According to this method, there is none of these screws 8 behind inside the pressure feed hose 12 so that the desired end can be easily brought to full fruition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a screw force feeding device for force feeding screws to an air driver or the like.

[Background technology]

Air drivers use air pressure to rotate a rotating shaft.
It works by screwing the screws, which are force-fed from the screw-feeding device to the screw holder at the tip of the rotating shaft, into prepared holes in the object to be tightened. A screw feeding device that pumps screws to an air driver like this one is! The structure is as shown in FIGS. 1 and 2. In the figure, reference numeral 1 denotes a base, and a screw feed through hole 2 is formed in the thickness direction. The screw feed through hole 2 has a side portion opened to one side of the base l, and the open portion serves as a screw socket 3. 4 is a screw feed plate, and separation claw part 5. It is provided with a guide portion 6 and a screw receiving portion 7, and is adapted to slide back and forth on one side of the base l by the action of a drive motor (not shown). The screws 8 are arranged in a line by a feeder (not shown) and are arranged on a line connecting the center of the screw socket 3 and the center of the screw feeding hole 2. Reference numeral 9 denotes a blocking plate that interlocks with the screw feeding plate 4 and slides inside the base 1 in the surface direction of the base l.

A through hole 10 is formed in this shielding plate 9, and the through hole 10 is set so as to match the screw feed through hole 2 of the base 1 in the state shown in FIG. Reference numeral 11 denotes a pressurized air passage, one end of which opens into the screw feeding through hole 2 below the blocking plate 9. 12 is a pressure hose.

In the state shown in FIGS. 1 and 2, the screw 8' that was previously separated is still attached to the pressure feed hose 12. When the screw feeding plate 4 and the shielding plate 9 move to the left in the figure from the state shown in FIGS. 1 and 2, the separating claw portion 5 of the screw feeding plate 4 moves as shown in FIG. -The first screw 8″ of the screws 8 lined up in a row
is separated from other screws 8 and guided to the guide portion 6. At the same time, inside the base l, the blocking plate 9 moves as shown in FIG.
In this state, pressurized air is fed into the pressurized air passage 11 from a pressurized air supply device (not shown), and pressurized air X is applied to the previously separated screw 8'. When the screw feeding plate 4 and the blocking plate 9 further move in the direction of the arrow from this state, the guide portion 6
The screw 8'' (see Figure 3), which was located at At this time, the previously separated screw 8' is forced downward by the pressurized air %XK.In the state shown in FIGS. It has been moving, and now it moves to the right from that state and returns to its original position.

As a result, as shown in FIG. 7, the second screw 8 falls onto the screw receiving part 7 of the screw feed plate 4, and as shown in FIG. ' drops to the pressure feed hose 12 through the through hole 10 of the blocking plate 90. By repeating this operation, a plurality of aligned screws 8
are pumped out sequentially.

Such a conventional bis pressure feeding device always uses the pressure feeding hose 12.
Since the screw 8 that will be fed next is contained inside, even if you try to change the screw 8 that is to be fed midway through, the first screw will always end up being fed the same screw as before, which is very inconvenient. l [Object of the Invention] This invention was made in view of the above circumstances, and an object of the present invention is to provide a screw feeding device that can force feed a new screw from the beginning even if the screw to be fed is changed in the middle. purpose.

[Disclosure of the invention]

The screw feeding device of the present invention includes a base that is provided in the thickness direction of the screw feed through hole, and a screw that feeds the screw into the screw feed through hole of the base from the upper side of the base. The screw feed means and the screw feed through hole are fully closed halfway through the screw feed through hole, and the screw feed through hole is opened only when the screw is fed into the screw feed through hole by the screw feed means. a pressurized air passage whose tip is open in a portion of the screw feeding through hole below the blocking means; and when the screw reaches the bottom of the screw feeding through hole IJ. The air supply means for supplying pressurized air to the pressurized air path is characterized in that the air supply means is biased.Next, the present invention will be explained in detail based on embodiments thereof.

That is, this screw pressure feeding device moves the blocking plate so that the through hole of the screw feeding plate coincides with the screw feeding through hole of the base when the screw enters the screw feeding through hole of the base,
It is configured so that the screw that has entered the screw feed through hole directly falls to the pressure feed hose part. Other than that, it is the same as the screw feeding device described in the background art section.

The operation of this screw feeding device will be explained with reference to FIGS. 9 to 16. In addition, in these figures, the same parts as those of the screw feeding device described in the background art section are given the same numerals. In the initial state, as shown in FIGS. 9 and 10, the leading screw of the screws 8 arranged in a row is located on the screw receiving portion 7 of the screw feeding plate 4. At this time, the screw 8 is not inserted into the pressure feed hose 12 at all. Next, when the screw feeding plate 4 and the blocking plate 9 move leftward from this state, the state shown in FIGS. 11 and 12 is reached.

When the screw feeding plate 4 and the blocking plate 9 move further to the left from this state, the state shown in FIG. 13 is reached, and the top screw 8'' enters the screw feeding through hole 2. The through hole 10 of the plate 90 is aligned with the screw feeding hose through hole 2 as shown in FIG. Next, from that state, the screw feeding plate 4 and the blocking plate 9 are returned as shown in FIGS. Screw 8# is continuously fed to the wall pressure feeder fed from the pressurized air passage 11. As a result, the screw feeding device returns to the state shown in FIGS. 9 and 10, and the next screw 8 is fed under pressure. Get ready.

In this way, in this screw force feeding device, the screw 8 that has entered the screw feed through hole 2 immediately falls to the pressure feed hose 12 and is force fed, so that no pinu 8 remains in the pressure feed hose 12. Therefore, even if the screw 8 to be force-fed is changed in the middle, a new screw can be force-fed from the beginning.

〔Effect of the invention〕

As described above, the screw feeding device of the present invention
t A base provided in the thickness direction of the communicating hole, a screw feeding means for feeding a screw into the screw feeding through hole of this base from the upper side of the base, and a screw feeding means for feeding a screw into the screw feeding through hole of the base, and a screw feeding means that feeds a screw from the upper side of the base, and a blocking means that closes the through hole and opens the screw feeding hole only when a screw is fed into the screw feeding through hole by the screw feeding means; A pressurized air passage that opens into the screw feed through hole on the lower side, and an air supply means that supplies pressurized air to the pressurized air passage when the screw reaches the bottom reed of the screw feed through hole. Because it is equipped with this feature, even if you change the screw to be force-fed midway through, you can force-feed a new screw from the beginning. Therefore, by using this screw feeding device, instantaneous switching of various types of screws has become possible. That is, this is possible by lining up several screw feeding devices and moving only the screw feeding devices for the necessary screws.

[Brief explanation of the drawing]

Figure 1 is a plan view of the main parts of the conventional example, and Figure 2 is its A-A'
The sectional views and FIGS. 3 to 8 are explanatory diagrams of the operation,
'W; Figure 4, Figure 6, and Figure 8 are BB', CC', and D-D' sectional views of Figures 3, 5, and 7, respectively, and Figures 9 to 8. FIG. 16 is an explanatory diagram of the operation of one embodiment of the present invention, and FIG. 10 and @ 12 are diagrams. FIG. 14 and FIG. 16 are FIG. 9 and FIG. 11, respectively. E-E', F-F', G in Figures 13 and 15
-G' and HH' sectional views. l... Base 2... Screw feed through hole 4... Screw feed plate 8... Screw 19... Shutoff plate 10... Through hole 11... Pressurized air path 12... Pressure hose agent Patent attorney Takehiko Matsumoto Figure 5 8 Figure 7 8' Figure 9 Figure 8 Figure 11 Figure 12 Figure 13 Figure 15 Figure 14 Figure 16

Claims (1)

[Claims] (1) One device having a screw feed through hole provided in the thickness direction, a screw feed means for feeding a screw into the screw feed 9 through hole of this base from the upper side of the base, and the screw feeding device described above. A blocking means that closes the through hole in the middle of the through hole and opens the screw feed 9 through hole only when the screw is fed into the screw feed 9 through hole by the screw feeding means, and Pressurized air is supplied to a pressurized air path that opens in a portion of the screw feed through hole below the blocking means, and to the pressurized air path when the screw reaches the bottom of the screw feed through hole. A screw pumping device characterized in that it is equipped with an air supply means.