JPH0226579Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a device for automatically assembling a fluororesin ring to a valve body.

[Prior art]

When assembling the fluororesin ring into the groove of the valve body, it is necessary to make the inner diameter of the fluororesin ring approximately the same as the outer diameter of the groove of the valve body before assembly. Therefore, during assembly, it is necessary to enlarge the inner diameter of the fluororesin ring, fit it into the groove of the valve body, and then tighten it to the inner diameter of the groove. Conventionally, this operation was performed manually as shown in FIGS. 5-7. That is, the conical portion 21a shown in FIG.
and the conical part 21 of the jig 21 consisting of the cylindrical part 21b.
A is a fluororesin ring 5 (the inner diameter of which is the cylindrical part 21
b), and press the urethane pad 22 shown in FIG. 5A against the fluororesin ring 5 to enlarge the fluororesin ring 5. This enlarged fluororesin ring 5 is placed in the ring groove 3a of the valve body 4 shown in FIG. 6, and the contraction tool 23 shown in FIG. 7 is repeatedly opened and closed via the lever 23a to contract the fluororesin ring 5. It was fitted into the groove 3a.

However, since this method is manual, it not only takes a long time, but also requires skill.
There were also variations in the shrinkage diameter of the fluororesin rings.

[Problem that the invention attempts to solve]

The object of this invention is to provide an automatic ring assembling device that is easy to operate, takes a short time, and does not cause variations in the shrinkage diameter of the fluororesin ring after it is assembled to the valve body.

[Means for solving problems]

In order to solve the above problems, this invention consists of a cylindrical part removably fitted on the outer circumferential surface of a cylindrical valve body having a plurality of ring grooves on the outer circumferential surface, and a hollow trapezoidal conical part connected to the front end of the cylindrical part. A mounting jig that is inserted into the inner circumferential surface of the valve body to hold the valve body, and a fluorocarbon resin ring of the same number as the ring groove of the valve body inserted into the trapezoidal conical part of the sleeve. While enlarging, push each piece from the trapezoidal conical part to the cylindrical part and place the pad in a position corresponding to the ring groove of the valve body, and the ring disposed on the cylindrical part of the sleeve fitted to the valve body. A caulking holder consisting of a vertically movable ring shutter and a caulking piece that is held from below, a knock-out rod that knocks out the sleeve from the valve body while holding the fluororesin ring and sleeve with the caulking holder, and a knock-out rod that knocks the sleeve out from the valve body. and a caulking mechanism that caulks the fluororesin ring into the ring groove of the valve body from above and below through the caulking piece of the caulking holder.

[Effect of invention]

With the above configuration, one fluororesin ring is supplied to the sleeve, and is pushed into the cylindrical part through the trapezoidal conical part of the sleeve by the urethane push pad, expanding its radius and corresponding to each ring groove in the valve body. It is placed in the position where it will be.

Next, attach the valve body to the horizontal mounting jig, fit the sleeve with the fluororesin ring on the outer circumferential surface of the valve body, align the ring groove of the valve body with the fluororesin ring, and caulk. The holder is operated from above and below to hold the fluorine resin ring and sleeve from above and below with its ring shutter and caulking piece, and then the sleeve is knocked out from the valve body with the knock out rod. Next, the caulking mechanism operates the caulking piece to shrink and fit the fluororesin ring into the ring groove of the valve body.

[Description of Examples]

This invention will be explained below with reference to FIGS. 1 to 4 shown in Examples. In FIG. 1, a sleeve 2 is fitted onto the jig shaft 1 in the vertical direction. The sleeve 2 is composed of a trapezoidal conical part 2a and a thin cylindrical part 2b connected to the trapezoidal conical part 2a, and the inner diameter of the thin cylindrical part 2b is set to a size that allows it to be fitted onto and removed from the outer peripheral surface of the valve body 3. Directly above the sleeve 2, a trapezoidal conical pad 4 made of urethane is arranged so as to be movable up and down by a cylinder (not shown). A fluororesin ring 5 extruded horizontally from the magazine 18 is fitted into the trapezoidal conical portion 2a of the sleeve 2, and this fluororesin ring 5 is expanded in radius to the thin cylindrical portion 2b of the sleeve 2 by the pad 4. I was pushed into the room. The fluororesin ring 5 is pushed into the thin cylindrical portion 2b by the number of ring grooves 3a of the valve body 3 (four in FIG. 1), and its position is adjusted by the pads 4 so that its pitch matches the pitch of the ring grooves 3a. ing.

As shown in FIG. 2, the valve body 3 is installed horizontally on a mounting jig 6, and the valve body 3 is
The aforementioned sleeve 2 with a fluorine resin ring is fitted onto the outer peripheral surface of the sleeve 2 through its thin cylindrical portion 2b.
At this time, the four fluororesin rings 5 on the sleeve 2 are opposed to the four ring grooves 3a of the valve body 3. At this time, the knockout rod 7 is pushed into the sleeve 2 through the valve body 3,
When the tip of the rod 7 comes into contact with a limit switch (not shown), the racks 8, 9 are driven by a drive source (not shown), and the crimping holders 1 attached to these racks 8, 9, respectively.
0 move upward and downward respectively.

Each caulking holder 10 includes five ring shutters 11 having semicircular end surfaces, and 44 caulking pieces 1 having semicircular end surfaces slidably disposed between these ring shutters.
4 is installed. Further, each caulking piece 14 is connected via a slider 13 to a caulking cylinder 12 or a caulking cylinder 16 as a caulking mechanism.
is connected to. In the normal state, a step is formed between the end surface of the ring shutter 11 and the end surface of the caulking piece 14, and this step creates four semicircular ring chambers 15 between them. is formed. Therefore, the four fluororesin rings 5 on the sleeve 2 are received in the fluororesin ring chamber 15 by moving the caulking holder 10 upward and downward, respectively.
After the fluorine resin ring 5 is completely received in the fluorine resin ring chamber 15, the knockout rod 7 is further pushed in and the sleeve 2 is knocked out from the valve body.

Next, the caulking cylinder 12 is operated at the bottom,
A caulking piece 14 attached to the cylinder 12 via a slider 13 moves up within the fluororesin ring chamber 15 and fits the fluororesin ring 5 into the ring groove 3a of the valve body 3. Next, the upper caulking cylinder 16 is activated and presses the fluororesin ring 5 from above, but at this time, the fluororesin ring 5 is supported from below by the caulking piece 14, so it is gradually compressed, and the fluorine resin ring 5 is gradually compressed. It is held at the forward end for several seconds, and contracts and fits into the ring groove 3a, taking on the appropriate diameter. During this caulking operation, the racks 8 and 9 are the wedge cylinders 19 that receive the reaction force of caulking.
It doesn't work because it has been backed up by

Finally, the valve body 3 is unclamped by the unlocking operation of the lever 17, and the operation of the device is completed.

[Effect of idea]

Since this invention has the above-mentioned mechanism, it has the following excellent effects.

(b) Compared to conventional manual work, the number of man-hours is greatly reduced and the working time is shortened.

(b) Conventional manual methods required skill to shrink fluororesin rings, but with this device, even unskilled workers can do it easily.

(c) With conventional manual work, there were variations in the shrinkage of the fluororesin rings, but this variation has been eliminated with this device.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1A is an enlarged front view showing the state in which the fluororesin ring is set in the sleeve. FIG. 1B is a bottom view of the pad for pushing in the fluororesin ring. FIG. 2 is a front view showing a state in which the sleeve is fitted to the valve body. FIG. 3 is a front view showing the valve body in an unclamped state. FIG. 4A is a perspective view of the caulking holder. FIG. 4B is an exploded view of FIG. 4B. FIG. 5A shows a pad for pushing in a fluororesin ring. FIG. 5B shows a front view of the fluororesin ring enlarging jig. FIG. 6 shows a front view of the valve body. FIG. 7 shows a tool for shrinking a fluororesin ring. 2... Sleeve, 3... Valve body, 4...
Pad, 5...Fluorine resin ring, 6...Mounting jig, 7...Knock out rod, 10...Clinching holder, 11...Ring shutter, 12...Clinching cylinder, 14...Clinching piece.

Claims (1)

[Scope of utility model registration request] A sleeve consisting of a cylindrical part that is removably fitted onto the outer circumferential surface of a cylindrical valve body having a plurality of ring grooves on the outer circumferential surface and a hollow trapezoidal conical part connected to the front end of the sleeve, and an inner circumferential surface of the valve body. A mounting jig is inserted into the trapezoidal conical part of the sleeve to hold the valve body, and the same number of fluororesin rings as the ring grooves of the valve body are inserted into the trapezoidal conical part of the sleeve. a pad disposed at a position corresponding to the ring groove of the valve body, a caulking holder that can be moved into and out of contact with the cylindrical portion of the sleeve fitted to the valve body, and a ring shutter attached to the caulking holder; a caulking piece slidably attached between the ring shutters, and a knockout rod for knocking out the sleeve from the valve body while holding the fluorine resin ring in a ring chamber formed between the ring shutter and the caulking piece. An automatic ring assembling device comprising a crimping mechanism that operates the crimping piece with the sleeve knocked out from the valve body and crimps the fluororesin ring into the ring groove of the valve body from above and below.