JPH0345783Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention provides a method for forming a coating of rubber or the like on the tip of a metal fitting such as a needle valve or plunger using a mold, in the preparation stage before forming the mold with the mold.
This invention relates to an improvement of a jig for inserting a metal fitting into a hole in a mold.

BACKGROUND OF THE INVENTION Generally, needle valves and plungers are formed by covering the tip of a metal fitting with a covering member such as resin or rubber.

This coating is formed on the lower mold 1 as shown in FIG.
, a space 4 surrounded by the middle mold 2 and the upper mold 3
A metal fitting 5 is housed inside. Then, with a covering member 7 such as rubber interposed between the upper die 3 and the presser die 6, a hot plate 8 is applied to the lower die 1 and the presser die 6.
This is done by heating and applying pressure.

Due to this heating and pressurization, the coating member 7 is melted and injected into the space 4 from the introduction path 10 under pressure, so that a desired coating is formed on the tip of the metal fitting 5.
In this case, a large number of holes are formed in the middle mold 2,
If a metal fitting 5 is accommodated in each hole, a large number of metal fittings can be covered in one molding process.

When covering the metal fittings, it is extremely troublesome and inefficient to insert the metal fittings 5 into each of the many holes of the medium 2 by hand, so it is usually possible to automatically insert the metal fittings 5 using a jig. It is being done.

FIG. 3 shows a conventionally used jig for inserting metal fittings. In this jig, an upper plate 14 having a second insertion hole 13 is slidably mounted on a lower plate 12 having a first insertion hole 11. Then, with the upper plate 14 shifted, a large number of metal fittings 5 are placed on the upper surface of the upper plate 14, and by stirring, the metal fittings 5 are placed on the second
It is inserted into the insertion hole 13 of. and,
When the jig is placed on the top surface of the medium mold 2 in the inserted state, and the upper plate 14 is slid to align both insertion holes 11 and 13, the metal fitting 5 will fall through the first insertion hole 11. Then, they are inserted into the holes of the medium mold 2 all at once.

However, in this conventional jig, when the metal fittings 5 placed on the upper surface of the upper plate 14 are stirred, the metal fittings 5 may be inserted upside down as shown in the figure. In such a case, it is necessary to take out the metal fitting 5 that has been inserted in the opposite direction and reinsert it, which is a cumbersome task and is a major obstacle to improving work efficiency.

In addition, as in the invention described in Japanese Patent Publication No. 54-33565, inserts arranged in a certain positional relationship in advance are sequentially inserted into a mold using a large device that has a complex combination of many cylinders. Are known.

However, the device of this invention is extremely complicated, large-sized, and expensive, and it is not possible to insert a large number of inserts, metal fittings, etc. into a mold at the same time in the same direction, resulting in poor working efficiency.

Problems to be Solved by the Invention This invention attempts to solve the above-mentioned problems, and its purpose is to be able to quickly insert the metal fitting into the jig in the correct orientation rather than in the opposite direction. It is an object of the present invention to provide a mold insertion jig for a metal fitting for forming a coating, which allows the insertion operation to be extremely easy and efficient.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention includes a pin plate, a lower plate placed on the upper surface of the pin plate and having a plurality of fitting holes formed therein, and an upper surface of the lower plate. an intermediate plate that is slidably placed on the upper surface of the intermediate plate and has a metal fitting receiving hole that corresponds to the metal fitting receiving hole; The pin plate has a plurality of pins protruding upward to be inserted into the insertion holes provided at the bottom of the metal fitting, and the tips of the pins pass through the corresponding metal fitting pit holes. and the tip of the pin protrudes to a position where the center of gravity of the metal fitting is above the top surface of the upper plate when the metal fitting is supported by the tip of the pin in an inverted state, Further, the upper plate is provided with a frame portion for storing the plurality of metal fittings with insertion holes on the upper surface of the upper plate.

In addition, a two-stage taper is formed on the circumferential surface of the metal fittings receiving hole, and the diameter of the hole increases upwardly, and the slope of the taper on the upper end side is gentler than the slope of the taper on the lower side. It's okay if it's something.

Further, the upper plate may be provided to be rotatable in a horizontal plane relative to the middle plate.

Function Since the present invention is constructed as described above, by randomly inserting a large number of metal fittings into the frame while the middle plate is shifted relative to the bottom plate, and by vibrating the top plate, the inner plate can be moved inside the frame. The metal fittings are stirred and inserted into the metal fitting accommodation hole of the intermediate plate through the metal fitting introduction hole.

In this case, when the metal fitting is inserted in the correct posture (top and bottom in the forward direction), the pin is inserted into the insertion hole of the metal fitting, and the metal fitting is accommodated in the metal fitting accommodation hole.

On the other hand, when the metal fitting attempts to enter the metal fitting accommodation hole in an inverted state, the tip of the head of the metal fitting is locked by the pin and cannot be inserted. In this inverted metal fitting, the tip of the pin protrudes to a position where the center of gravity of the metal fitting is above the top surface of the top plate when the metal fitting is supported by the tip of the pin in an inverted state. Due to the vibrations, this inverted metal fitting is easily thrown out of the metal fitting introduction hole.

Then, after being thrown away, another metal fitting in the correct posture enters, so that all the metal fittings are inserted in the correct posture into the metal fitting receiving hole after all.

In this state, remove the combined body consisting of the lower plate, middle plate, and upper plate from the pin plate, mark this combined body on the mold, slide the middle plate, and make the metal fitting accommodation hole and the metal fitting pit hole in the lower plate. If they match, the metal fittings will fall through the metal fitting pit and be inserted all at once into the intended hole of the mold.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings. Reference numeral 15 represents a pin plate, and this pin plate 15 includes:
A plurality of pins 16 are provided to protrude upward.
The number of pins 16 is the same as the number of holes in the medium size 2 shown in FIGS.
Each position corresponds to each hole position of the medium mold 2 on a one-to-one basis.

Further, a lower plate 17 is placed on the upper surface of the pin plate 15, and a plurality of fitting pit holes 18 are formed in the lower plate 17, corresponding to each hole 9 of the medium mold 2.

Further, an intermediate plate 20 is slidably mounted on the upper surface of the lower plate 17, and this intermediate plate 20 also has metal fitting accommodation holes 21 in one-to-one correspondence with the metal fitting pit holes 18.
is provided. The circumferential surface of the metal fitting receiving hole 21 has a first taper 22 from the lower end to the center and a second taper 23 from the center to the upper end, in order to facilitate insertion of the metal fitting 5. 2
A stepped taper is formed, and the second taper 2
3 is gentler than the slope of the first taper 22.

Further, an upper plate 24 is placed on the upper surface of the middle plate 20 so as to be able to slide in a straight direction and rotate through 360°, and this upper plate 24 also corresponds to the metal fitting accommodation hole 21. Thus, a tapered fitting introduction hole 25 is formed.

At the edge of the upper plate 24, the upper plate 2
A frame portion 26 for mounting and accommodating a large number of metal fittings 5 is fitted onto or integrally fixed to the upper surface of the metal fittings 4. The lower plate 17, the middle plate 20, and the upper plate 24 are integrally connected so as not to be separated from each other, and these three members 17, 20, and 24 form a composite assembly 27.

By the way, the pin 16 planted on the pin plate 15
passes through the fitting pit hole 18, and its tip extends into the fitting receiving hole 21. In addition, the position of the tip of this pin 16 is such that when the metal fitting 5 is locked upside down (inverted) at the tip of the pin 16, the center of gravity of the metal fitting 5 is in the upper position, as shown in FIG. Board 2
It is set to be above the top surface of 4.

In this embodiment configured as described above, in order to accommodate the metal fitting 5 in the metal fitting accommodation hole 21,
Do as follows.

First, the intermediate plate 20 is slightly slid to shift the positions of the metal fitting trap hole 18 and the metal fitting accommodation hole 21, and in this state, a large number of metal fittings 5 are randomly thrown onto the upper surface of the upper plate 24 and positioned.

Next, a separate vibration generator (not shown)
The upper plate 2 is removed by driving or by hand.
4, the metal fitting 5 on top of the upper plate 24 will be
It is turbulently stirred and enters the metal fitting accommodation hole 21 from the metal fitting introduction hole 25. In this case, when the metal fitting 5 is inserted in the correct orientation, that is, in the vertical direction, the pin 16 is inserted into the insertion hole 28 of the metal fitting 5, so that the metal fitting 5 is locked on the upper surface of the lower plate 17. It is accommodated in the metal fitting accommodation hole 21 in this state.

On the other hand, when the metal fitting 5 is in an inverted state and attempts to enter the metal fitting accommodation hole 21 from the metal fitting introduction hole 25, the tip head of the metal fitting 5 is locked to the tip of the pin 16, and the metal fitting 5 is inserted into the metal fitting accommodation hole 21. It cannot enter the hole 21.

At this time, if the vibration is continued to be applied to the upper plate 24, the center of gravity of the metal fitting 5 in this inverted state will be shifted to the upper plate 24.
Since the metal fitting 5 is placed above the metal fitting 4 and is unstable, it is immediately thrown off and escapes from the metal fitting introduction hole 25, and thereafter the metal fitting 5 in the vertical direction enters into the metal fitting accommodation hole 21.

By applying vibration to the upper plate 24 in this way, the metal fittings 5 can be easily and quickly accommodated in all the metal fitting accommodation holes 21 in the correct posture.

Next, the composite assembly 27 in which the metal fittings 5 are housed as described above is removed from the pin plate 15, and this composite assembly 27 is placed on the middle mold 2, and the hole 9 of the intermediate mold 2 and the lower plate 17 are While matching the position with the metal fitting receiving hole 18, slide the middle plate 20, and insert the metal fitting receiving hole 2.
If the position of the metal fittings 1 is aligned with the metal fitting pit hole 18, the metal fittings 5 will fall through the metal fitting pit hole 18, and will be housed all at once in the hole 9 of the target medium mold 2.

Effects of the invention Since the present invention is constructed as described above, even if a metal fitting tries to enter the metal fitting accommodation hole in an inverted state, it is prevented from entering, and furthermore, this inverted metal fitting is unstable in position. Because of this, the metal fittings are thrown away by the vibrations, and then the metal fittings in the correct orientation enter the vertical direction. Therefore, there is an unavoidable problem with conventional devices, namely, when the metal fittings housed in an inverted state are pulled out from the metal fitting housing hole.
You are completely freed from troublesome work such as having to change to the correct posture. Therefore, it becomes possible to perform the work of inserting the metal fitting into the mold extremely easily and efficiently.

In addition, the metal fittings only need to be thrown randomly onto the top surface of the upper plate, and by simply applying vibration to the upper plate, many metal fittings can be efficiently brought into an upright state at once. It is possible to insert . Moreover, since the structure is simple, it is possible to economically insert the metal fitting into the mold using a small and inexpensive device.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the present invention;
3 is a sectional view showing the structure of a conventional example, and FIG. 4 is an explanatory view showing a state in which a covering member is formed on a metal fitting. 5...Metal fittings, 15...Pin plate, 16...Pin,
17...Lower plate, 18...Metal fitting pit hole, 20...Middle plate, 21...Metal fitting accommodation hole, 22...First taper, 23...Second taper, 24...Upper plate, 25
...Metal fitting introduction hole, 26...Frame part, 28...Insertion hole.

Claims (1)

[Claims for Utility Model Registration] (1) A pin plate, a lower plate placed on the upper surface of the pin plate and having a plurality of fitting holes formed therein, and a lower plate placed on the upper surface of the lower plate so as to be slidable. A middle plate in which a metal fitting accommodation hole corresponding to the metal fitting trap hole is formed, and an upper plate slidably written on the upper surface of this middle plate and in which a metal fitting introduction hole corresponding to the metal fitting accommodation hole is formed. The pin plate has a plurality of pins protruding upward to be inserted into insertion holes provided at the bottom of the metal fitting, and the tips of the pins are inserted into the metal fitting accommodation holes through the corresponding metal fitting pit holes. In addition, the tip of the pin protrudes to a position where the center of gravity of the metal fitting is above the top surface of the upper plate when the metal fitting is supported by the tip of the pin in an inverted state. A mold insertion jig for a metal fitting for forming a covering portion, characterized in that a frame portion for mounting and accommodating the plurality of metal fittings with insertion holes is provided on the upper surface of the upper plate. (2) A two-stage taper is formed on the circumferential surface of the metal fittings receiving hole, and the diameter of the hole increases toward the top, and the slope of the taper on the upper end side is gentler than that of the taper on the lower side. A mold insertion jig for a metal fitting for forming a covering portion according to claim 1 of the registered utility model. (3) A mold insertion jig for a metal fitting for forming a covering portion as set forth in claim 1 of the utility model registration claim, wherein the upper plate is rotatable in a horizontal plane with respect to the middle plate. Ingredients.