JP3122952B2 - O-ring mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a case where an O-ring is mounted on an annular groove formed on an outer peripheral surface of a core built in a pipe end anticorrosion joint body or a pipe end anticorrosion valve. The present invention relates to an O-ring mounting device to be used.

[Prior Art] Generally, in a pipe end anticorrosion joint for water supply or the like, as shown in FIG. 6, both ends of a metal joint body 62 made of steel or cast iron or the like having female threads 61, 61 formed at both ends. Screw part
Form a resin coating layer 63 for rust prevention on the inner surface excluding 61, 61,
The resin core 23 is screwed into the female screw portions 61, 61 at both ends, with a gap 65 allowing the end of the inner surface coated steel pipe 64 to be fitted outside,
Further, a male screw portion 67 on the outer periphery of an end portion of the inner surface coated steel pipe 64 is screwed into the female screw portions 61, 61, and is externally fitted to the extending portion 23a of the core 23.

Incidentally, in order to ensure liquid tightness between the outer periphery of the extension 23a and the inner periphery of the inner surface coated steel pipe 64, an annular groove 30 is formed on the outer periphery of the extension 23a. By fitting the ring 7, the connection between the joint main body 62 and the inner surface coated steel pipe 64 is sealed. However, in order to fit the O-ring 7 into the annular groove 30, conventionally, the O-ring 7 is spread by hand. In the annular groove 30 or manually by using a simple jig or the like.

[Problems to be Solved by the Invention] As described above, conventionally, the O-ring 7 is manually attached to the annular groove 30, so that the workability is very poor. That is, there is an inconvenience that the O-ring 7 having an inner diameter smaller than the diameter of the annular groove 30 has to be expanded by hand and fitted into the annular groove 30 so as to be sunk in the extending portion 23a of the core 23. In particular, an annular ring 23b having a diameter larger than the outer diameter of the extension portion at the edge of the annular groove 30.
When the O-ring 7 is formed, it takes much more time to fit the O-ring 7, and the O-ring 7 is deformed by twisting or the like by forcibly expanding the O-ring 7 by hand. In some cases, the sealing performance was poor, and even if it could be fitted into the annular groove 30, the predetermined sealing performance was bad.

The present invention has been made to solve such a conventional problem, and an O-ring mounting apparatus capable of improving workability for mounting an O-ring on a core and ensuring predetermined sealing performance. The purpose is to provide.

[Means for Solving the Problems] In order to achieve the above object, an O-ring mounting apparatus according to the present invention has an O-ring fitting annular groove formed on an outer peripheral surface and is incorporated in a pipe end anticorrosion joint body. A cylindrical shape in which a core holding body for detachably holding a core is provided to face the substrate, is arranged coaxially with the core, and is configured so as to be externally fitted and connectable to the distal end side and the outer peripheral side of the core. An O-ring is externally fitted and temporarily held on the outer peripheral surface of the guide body in an elastically expanded state, is externally fitted on the cylindrical guide body, and is relatively movable in the axial direction with respect to the core holder. The O-ring push-out cylindrical body is held on the substrate side, and the cylindrical guide body is configured such that the outer diameter of a portion that is externally fitted and connected to the distal end side of the core and to the outer side is the same as the core holder. When the cylinder is relatively moved with the O-ring extrusion cylinder, it is elastic by the O-ring extrusion cylinder. After the O-ring in the expanded state is pushed out of the cylindrical guide body, the O-ring is configured to have an outer diameter that shifts to the annular groove on the core side only by the elastic contraction.

[Operation] According to the above configuration, the O-ring is elastically expanded and externally fitted to the outer peripheral surface of the cylindrical guide body to temporarily hold the O-ring, and then the distal end of the core holding the cylindrical guide body to the core holder. O-ring temporarily expanded on the outer peripheral surface of the cylindrical guide body by moving the core holding body and the O-ring pushing cylinder relative to each other, After being extruded from the cylindrical guide by the extrusion cylinder, the O-ring is transferred to the core-side annular groove only by the elastic diameter reduction, so that the O-ring is transferred from the cylindrical guide to the core annular groove. In addition to the effect that sometimes the O-ring is not expanded and twisted, the effect of achieving the automation of the mounting of the O-ring is achieved.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

1 and 2 are a top view and a side view, respectively, showing an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an index table constituting a substrate, which is rotatably supported on a pedestal 2 via a rotary shaft 3 and is configured to intermittently rotate in the direction of arrow C. Reference numeral 4 denotes an O-ring parts feeder disposed on the left rear side of the index table 1, and reference numeral 5 denotes a core parts feeder disposed on the right rear side of the index table 1.

6 is an O-ring 7 in the O-ring parts feeder 4
O-ring conveyance chute for carrying out the parts feeder, near the exit of the parts feeder 4
A first air nozzle 8 is provided which blows air onto the O-ring 7 discharged to the transport chute 6 and is fed forward (in the direction of arrow a). 9 is a linear vibration feeder that vibrates the O-ring 7 on the transport chute 6;
Reference numeral 10 denotes an O-ring receiving member installed near the tip of the transport chute 6. On the tip side of the transfer chute 6,
As shown in FIG. 3, there is provided a delivery device 11 for separating the O-rings 7 continuously transported by the transport chute 6 one by one and supplying the O-rings 7 to the O-ring receiving member 10 intermittently. The delivery device 11 includes gates 12 and 13 for opening and closing the transport chute 6 alternately before and after in the transport direction.
A second air nozzle 14 for blowing out the O-ring 7 divided by 13 to the O-ring receiving member 10 with air is provided.

Reference numeral 15 denotes an O-ring transfer member which is configured to be movable in the direction of arrow b above the O-ring receiving member 10, reference numeral 16 denotes a platform for moving the O-ring transfer member 15, and reference numeral 17 denotes an O-ring in the O-ring receiving member 10. This is a cylinder device that pushes the ring 7 toward the lower surface of the O-ring transfer element 15. On the lower surface of the O-ring transfer element 15, a holding frame 18 into which the O-ring 7 from the O-ring receiving member 10 is fitted as shown in FIGS. And a plurality of expanding pins 19 that are provided so as to be displaceable in the direction and expand the O-ring 7 fitted to the holding frame 18.

The index table 1 is provided with four O-ring mounting mechanisms 20 at positions equally arranged in the circumferential direction.
The O-ring 7 is received from the O-ring transfer element 15 and the O-ring 7 is mounted on a core to be described later at a predetermined position where the index table 1 rotates half a turn. twenty one
Is a cylinder device that drives the O-ring mounting mechanism 20 when the O-ring transfer element 15 is positioned on the index table 1.

Reference numeral 22 denotes a core transport chute for transporting the core 23 in the core part feeder 5, and reference numeral 24 denotes the transport chute 22.
This is a straight vibration feeder that sends the upper core 23 forward by vibration. At a position near the tip of the transfer chute 22, a delivery slider 25 and a slider driving cylinder device for sending the core 23 toward the index table 1 (in the direction of arrow d).
26 are installed. 27 is a feeding cylinder device for feeding the core 23 from the sending slider 25 toward the O-ring mounting position, and 28 is a front side of the feeding cylinder device 27 for detachably holding the core 23. Reference numeral 29 denotes a color sensor for detecting the presence or absence of the O-ring 7 of the O-ring mounting mechanism 20.

The parts of the O-ring mounting mechanism 20 and the core positioning device 28 will be described with reference to FIGS. 5a to 5c.

6, the core 23 is built in the pipe end anticorrosion joint main body 62 as shown in FIG. 6 and has an extended portion 23a. A rib 23b having a diameter larger than the outer diameter of the extending portion is formed at the edge of the groove 30. 31
Is a plunger fitted and positioned in the core 23, 32 is a cylinder device for driving the plunger 31, 33 is a core holder holding the core 23, and the color sensor 29 is located at a position corresponding to the annular groove 30. Installed.

Numeral 34 denotes a cylindrical guide body which is disposed coaxially with the core 23 and on which the O-ring 7 is externally fitted. The O-ring push-out tube 35 is externally fitted to the tubular guide 34 so as to be vertically movable. This O-ring extrusion cylinder 35
A first compression coil spring 38 is interposed between a spring seat plate 36 fixed to a lower portion of the first guide member and an annular convex portion 37 for retaining formed on the outer peripheral surface of the cylindrical guide body 34.

Reference numeral 39 denotes a movable holder integrally holding the O-ring pushing cylinder 35. The movable holder 39 is fitted and held in a vertically movable manner on a cylindrical bracket 40 fixed to the index table 1. A second compression coil spring 42 is interposed between the retaining end 40a on the upper end side of the bracket 40 and the retaining collar 41 formed at the lower end of the movable holder 39. . The O-ring mounting mechanism 20 is constituted by the cylindrical guide body 34, the O-ring pushing cylinder 35, the movable holder 39, the bracket 40, and the like.

An opening of the index table 1 is provided below the index table 1 corresponding to the O-ring mounting position.
A cylinder device that pushes up the movable holder 39 through 43
The O-ring push-out cylinder 35 is raised by the pushing-up operation of the cylinder device 44 and pushes out the O-ring externally fitted to the cylindrical guide body 34 so as to push out the core.
It is adapted to transfer to 23 grooves 30.

 Next, the operation of the above configuration will be described.

O-rings 7 aligned by the O-ring parts feeder 4
Is discharged to the transport chute 6, the first air nozzle 8
Is conveyed continuously on the conveyance chute 6 in the direction of the arrow a by the air from the air and the vibration of the linear vibration feeder 9, and the gates 12, 13 of the delivery device 11 are alternately opened and closed by 1.
The second air nozzle 14 separates
It is sent out to the ring receiving member 10.

The O-ring 7 of the O-ring receiving member 10 is pushed into the holding frame 18 of the O-ring transfer element 15 by the cylinder device 17 as shown in FIG. After receiving the O-ring 7, the O-ring transfer element 15 moves to the index table 1 side, that is, the direction of the arrow b, and displaces the plurality of expanding pins 19 outward to move the O-ring 7 as shown in FIG. 4b. The elastically expanded state is maintained.

When the O-ring mounting mechanism 20 reaches a position corresponding to the O-ring transfer element 15 due to the intermittent rotation of the index table 1, the cylinder device 21 operates to operate the O-ring transfer element 15.
The O-ring 7 is externally fitted to the outer peripheral surface of the cylindrical guide body 34 in the O-ring mounting mechanism 20 and is temporarily held.

On the other hand, the cores 23 aligned by the core parts feeder 5
Is discharged to the transport chute 22 and continuously conveyed on the transport chute 22 in the direction of arrow a by the vibration of the rectilinear vibration feeder 24, and then sent out by the delivery slider 25 in the direction of arrow d. Further, the core 23 is sent out to a predetermined position above the index table 1 by the feeding cylinder device 27, and as shown in FIG.
While being held by the core holding member 33 of 28, it is positioned at a position facing the O-ring mounting mechanism 20.

In this state, when the cylinder device 44 is driven to rise, the movable holder 39 and the O-ring pushing cylinder 35 are displaced upward against the spring force of the second compression coil spring 42 as shown in FIG. 5b. The cylindrical guide body 34 on which the O-ring 7 is temporarily held is pushed up and externally fitted and connected to the distal end side of the core 22 held on the core holding body 33. Further, when the upward drive of the cylinder device 44 is continued, the cylindrical guide body
34 is stationary, whereas the O-ring extrusion cylinder 35
As shown in FIG. 5c, the O-ring 7 of the cylindrical guide body 34 is displaced upward together with the movable holder 39 against the spring force of the first compression coil spring 38 by the O-ring pushing cylinder 35. It is pushed out from the outer peripheral surface of the cylindrical guide body 34 and fitted into the annular groove 30 of the core 23. Thus, the O-ring 7
When the O-ring 7 is pushed out by the O-ring pushing-out cylinder 35 from the cylindrical guide 34 which is fitted and externally held in the elastically expanded state, the O-ring 7 in the elastically expanded state
After being extruded from the cylindrical guide body 35, it is transferred to the annular groove 30 on the core 23 side only by the elastic diameter reduction. Therefore, when the O-ring is transferred from the cylindrical guide body 34 to the annular groove 30 of the core 23, the O-ring 7 is not expanded and twisted.

At this time, the presence or absence of the O-ring 7 is detected by the color sensor 29, and if the O-ring 7 is not mounted,
Stops taking in the core 23 from the core transfer chute 22 and sets the next O-ring mounting mechanism on the index table 1.
If 20 O-rings 7 are used and the core 23 is not taken in, the index table 1 is automatically stopped and the next core 23 is taken in. If these are repeated several times, it will be displayed as a failure.

In the above embodiment, the core holder 33 is fixed, while the O-ring pushing cylinder 35 is axially moved. It is also possible to adopt a configuration in which the core holder 33 and the cylindrical guide body 34 are axially moved with respect to the O-ring pushing cylinder 35 while being fixed.

[Effects of the Invention] As described above, according to the present invention, the relative relationship between the core held by the core holding body and the O-ring pushing cylinder externally fitted to the cylindrical guide body temporarily holding the O-ring. Since the O-ring is transferred to the groove of the core by the movement, the mounting of the O-ring can be automated, the productivity can be improved, and the O-ring can be moved without deformation such as twisting. , And therefore, a predetermined sealing performance can be ensured.

[Brief description of the drawings]

1 and 2 are a top view and a side view, respectively, showing an embodiment of an O-ring mounting apparatus according to the present invention. FIG. 3 is a side view showing the vicinity of a transfer chute for an O-ring.
4b is a diagram showing an O-ring holding state by an O-ring transfer element, FIGS. 5a, 5b and 5c are diagrams for explaining the operation of the main part of the O-ring mounting device, and FIG. FIG. 4 is an explanatory diagram of a core built therein. 1 ... board, 7 ... O-ring, 23 ... core, 30 ... annular groove, 33 ... core holder, 34 ... cylindrical guide body, 35 ... O
Cylindrical body for ring extrusion, 62 ... The pipe end corrosion-resistant joint body.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Ryuichi Higashikawa, 153-1, Tajiyone-cho, Kishiwada-shi, Osaka Japan Steel Pipe Fitting Co., Ltd. (56) References -107436 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23P 19/02

Claims (1)

(57) [Claims] An annular groove for fitting an O-ring is formed on an outer peripheral surface of the core, and a core holder for detachably holding a core built in the pipe end anticorrosion joint body is provided opposite to the substrate. An O-ring is elastically expanded and externally fitted to an outer peripheral surface of a cylindrical guide body which is arranged coaxially and is configured to be externally fitted and connectable to the distal end side and the outer peripheral side of the core, and is temporarily held, An O-ring extrusion cylinder, which is fitted to the cylindrical guide body and is configured to be relatively movable in the axial direction with respect to the core holder, is held on the substrate side, and the cylindrical guide body is ,
When the outer diameter of the portion that is fitted and connected to the distal end side and the outer side of the core is relatively moved between the core holder and the O-ring pushing cylinder, the O-ring pushing cylinder is elastically expanded. An O-ring mounting device characterized in that the O-ring is configured to have an outer diameter that, after the O-ring in the open state is pushed out of the cylindrical guide body, transitions to the annular groove on the core side only by the elastic contraction. .