JPH0357392Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a suction and insertion device for processed products.
In particular, bolts that attract and hold short workpieces such as washers by lowering the internal pressure of the device and are placed at predetermined locations corresponding to the workpieces;
The present invention relates to a device for rotating and inserting the processed product into a member such as a screw.

[Conventional technology]

FIG. 2 shows, in longitudinal section, the structure of a workpiece (washier) adsorption and insertion device as an example of a conventional type. In FIG. 2, a drive shaft 51 is rotatable by a drive device (not shown), and a block 52 is fixed to the drive shaft 51. As shown in FIG.
The holder 53 is fixed to the block 52 and holds the suction tube 54 such that the tip of the suction tube 54 is located on an extension of the central axis of the drive shaft 51. This holding is performed by tightening bolts 56 via springs 55 at a plurality of locations on the outer circumferential surface of the suction tube 54 .

One end of the suction tube 54 forms a tip 57 for holding a washer, and one end of a shaft 58 is fitted and connected to the other end of the suction tube. Further, a guide pin 60 is built in between one end of the shaft 58 via a spring 59.
The tip of this guide pin 60 is connected to the tip 5 of the suction tube.
7 protrudes slightly from the opening. A spherical bearing 61 is interposed between the other end of the shaft 58 and the block 52 and holder 53, and a bolt 62 is connected to the other end of the shaft 58 via a collar to prevent the spherical bearing 61 from coming off. It is screwed together.

Further, one end of the shaft 63 is fixed to the side surface of the suction tube 54 by bolt connection, and the other end of the shaft 63 is connected to the hollow shaft 64 via a ball bearing 65.
It is inserted into the through hole of No. 4. The hollow shaft 64 is engaged with an opening 67 of the support member 66, and is adapted to move in the direction of the arrow in response to the rotational movement of the suction tube 54. Furthermore, the tip 5 of the adsorption tube 54
A joint 68 is fitted and coupled near 7, one end of an air hose 69 is connected to this joint 68, and the other end is connected to an air suction device (not shown).

In the apparatus shown in FIG. 2, the air suction device is activated to suck air from the tip 57 of the adsorption tube 54 through the joint 68 and the air hose 69, thereby adsorbing and holding the washer at the tip 57. will be held. In addition, when inserting the washer held in this way into a member such as a bolt placed at a predetermined location corresponding to the washer, the drive shaft 51 is rotated, thereby turning the suction tube 54. The insertion is performed while

[Problem that the invention attempts to solve]

In the conventional device described above, the suction air hose is attached to the side near the tip of the suction tube, and when inserting a processed product, the air hose is forcibly bent, so the bending stress is applied to the suction tube. This causes a problem in that it becomes difficult to maintain the tip of the suction tube on an extension of the central axis of the drive shaft, that is, the precision in returning the tip to the origin is reduced. This also leads to a decrease in work efficiency when inserting processed products.

SUMMARY OF THE INVENTION In view of the problems of the conventional type described above, an object of the present invention is to provide a workpiece suction and insertion device that can maintain high accuracy in returning the tip end portion that holds the workpiece to its origin.

[Means for solving problems]

According to the present invention, there is provided a drive shaft which has a built-in passage communicating with the fluid suction means and is movable and rotatable by external drive, a block fixed to the drive shaft, and one end of which is connected to the other end. a tube that is thinner than the end of the block, and one end of which forms a tip for holding a workpiece; and a tube that is fixed to the block and extends along the central axis of the drive shaft. a holder that holds the tube so that the tip is positioned;
a first member that is fitted and coupled to the other end of the tube and has a through hole; a second member having a through hole whose end is fitted into the through hole of the first member and through which fluid sucked from the tip of the tube can pass; and a through hole of the second member; a joint having a communicating through hole, fit-coupled to the other end of the second member, and connectable to the passage in the drive shaft at least via a flexible conduit; A workpiece suction and insertion device is provided.

[Effect]

In the device of the present invention, when inserting a workpiece, that is, when the tube is rotating, the first member is fitted and connected to the tube and the first member is fitted into the through hole of the first member. The second member and the second member rotate independently of each other via bearings, so that the flexible conduit connected to the joint that is fit-coupled to the second member is temporarily bent. Even if you are
That bending stress is not transferred to the tube. This makes it possible to maintain the tip end of the tube on the extension line of the central axis of the drive shaft with high precision, and to prevent the accuracy of returning the tip end to the origin from decreasing.

〔Example〕

FIG. 1 shows, in longitudinal section, the structure of a workpiece suction and insertion device as an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a drive shaft, which has a built-in passage 2 that communicates with air suction means (not shown), and is movable and rotatable by external drive. A block 3 is fixed to the drive shaft 1 by a key (not shown), so that the block 3 is synchronized with the movement of the drive shaft 1. A spacer 4 having a through hole communicating with the passage 2 in the drive shaft 1 is threadedly connected to the block 3, and the spacer 4 further includes:
A joint 5 having a through hole communicating with the through hole of the spacer and having one end of the through hole closed is screwed together.

A holder 6 is fixed to the block 3 by bolt connection, and is used to hold the suction tube 7 such that the tip of the suction tube 7 is located on an extension of the central axis of the drive shaft 1. This holding is carried out by the adsorption tube 7
This is done by tightening bolts 9 via springs 8 at eight locations (two locations in the illustrated example) on the predetermined outer circumferential surface of.

One end of the suction tube 7 is formed thinner than the other end, and this one end forms a tip 10 for holding a workpiece (washier), and the other end has a through hole. A hollow shaft 11 having a hole is fitted and connected. One end of a roller shaft 13 is fitted between the hollow shaft 11 and the roller shaft 13 via a thin double-shielded radial ball bearing 12 so as to be rotatable around the central axis of the suction tube 7. This roller shaft 13 has a through hole through which air sucked from the tip 10 of the suction tube 7 can pass, and one end of the roller shaft is arranged so as not to come off from the through hole of the hollow shaft 11. It is locked at both ends by E-shaped rings 14.

A guide pin 16 is built into the suction tube 7 with a spring 15 interposed between it and one end of the roller shaft 13. As shown in FIG. The head portion 17 of the suction tube 7 is hooked onto the shoulder portion 18 of the suction tube 7, and the tip portion 19 of the guide pin 16 slightly protrudes from the opening of the tip portion 10 of the suction tube 7. This protrusion causes the washer and the distal end 10 of the suction tube 7 to
This helps in easily aligning the

When inserting the washer into a bolt, etc.,
When the tip of a bolt or the like enters the tip 10 of the suction tube 7, the guide pin 16 is housed in the suction tube 7.

A spherical bearing 20 is interposed between the other end of the roller shaft 13 and the block 3 and holder 6, and a joint 22 is fitted and connected to the other end of the roller shaft via a collar 21. . This joint 22 is
It has a through hole that communicates with the through hole of the roller shaft 13,
It is connected to the aforementioned joint 5 via a flexible air hose 23.

In the apparatus shown in FIG. 1, the air sucked from the tip 10 of the suction tube 7 is passed through the joint 22, which is disposed on the line of the central axis of the suction tube passing through the tip, and the air is sucked through the air hose 23. This joint 22
is not fixed to the main body of the suction tube 7, but to a roller shaft 13 that is rotatably attached around the central axis of the suction tube, so when inserting the washer, the suction tube Even if the air hose 23 is bent or twisted when the air hose 23 is turned, the bending stress will not be transmitted to the suction tube. Therefore, it is possible to maintain the center of the tip portion 10 of the suction tube on the extension line of the central axis of the drive shaft 1 with high precision.

[Effect of idea]

As explained above, according to the present invention, it is possible to maintain high accuracy in returning the tip of the tube that holds the workpiece to the origin, and it can also contribute to preventing a decrease in work efficiency when inserting the workpiece.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing a workpiece suction and insertion device as an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing an example of a conventional type. 1... Drive shaft, 2... Passage, 3... Block,
6... Holder, 7... Adsorption tube, 10... Tip part,
11...Hollow shaft (first member), 12...Ball bearing,
13... Roller shaft (second member), 22... Joint,
23...Air hose.

Claims (1)

[Scope of Claim for Utility Model Registration] A drive shaft that has a built-in passage communicating with a fluid suction means and is movable and rotatable by external drive, a block fixed to the drive shaft, and one end. a tube whose one end is thinner than the other end, and whose one end forms a tip for holding a workpiece; a holder that holds the tube so that the tip of the tube is positioned; a first member that is fitted and coupled to the other end of the tube and has a through hole; and a bearing between the first member. a through hole whose one end is rotatably inserted into the through hole of the first member so as to be rotatable around the central axis of the tube, through which fluid sucked from the tip of the tube can pass; a second member having a through hole communicating with the through hole of the second member, and being fitted and coupled to the other end of the second member;
and a joint that can be connected to a passage in the drive shaft at least via a flexible conduit.