JPH088039Y2 - Vacuum suction type work holder - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum suction type work holder for sucking and holding a work by using a vacuum.

[0002]

2. Description of the Related Art As a conventional work holder for holding a work by suction using a vacuum, those shown in FIGS. The work holder is provided with a lattice-shaped groove portion c for fitting a band-shaped elastic sealing material b on the front surface side of the substrate a, and the groove portion c is provided with a suction hole e connected to the suction portion d at a predetermined interval. It was provided in several places.
Then, when using it, first, in order to ensure that the work f is suction-held even in the final processing state,
The place where the work is to be arranged is carefully set so that at least one suction hole e is included in the closed space portion formed by the fitting of the elastic sealing material.

After that, as shown in FIG. 8, the elastic sealing material b is fitted into the groove c so that the elastic sealing material comes into contact with the peripheral portion of the back surface of the work f, and the surface of the substrate is exposed. The suction hole was closed with a lid member g as shown in FIG.

Incidentally, the reason why the number of the suction holes in the work holder is made small in this way is to minimize the troublesomeness of closing the unnecessary suction holes with the lid member and the complexity of the management of the lid member. Conceivable. But this
With the technology, since there are few suction holes, there are few suction holes on the back side of the workpiece.
Work place where there is at least one suction hole e
There is the trouble of having to pay attention to
, A plurality of workpieces are arranged on the substrate surface and adsorbed at the same time.
In some cases, you have to use nerves in the placement of the work,
It couldn't be done simply. Also, there are few suction holes
Since the exhaust speed of the suction hole is slow,
There was also a problem that it took time. Therefore, the surface of the substrate
, A grid-like groove for fitting an elastic sealing material
In addition to providing the parts, recesses are provided in each partitioned grid.
The bottom surface of the recess penetrates the bottom surface of the substrate.
A hole is provided, and a suction hole composed of the recess and the through hole is formed,
By the negative pressure from the suction hole, the workpiece placed on the substrate is
Vacuum adsorption type work device configured to adsorb and hold.
A cradle has been proposed (JP-A-3-187701).
See the bulletin).

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When using the work holder according to Japanese Patent No. 701,
By providing suction holes in each of the grids
It was possible to solve the problems of the conventional technology that
The suction holes on each grid at the location
Needless to say, each case is a place that does not correspond to the work.
The suction holes in the sub-eyes should be closed to improve suction efficiency.
I had to do it. The means is to thread the through hole.
Set the plug member here by screwing it closed.
Was to do. Therefore, for opening and closing a large number of suction holes
There was a problem that it took a lot of time and effort.
Therefore, the inventor of the present invention has completely separated the screw-type stopper member.
A rotary valve machine that can open and close the suction hole without removing it.
I thought about it. However, this rotary valve has a similar screw fixing type
Therefore, when opening and closing the valve, tightening and loosening are involved.
The abrasion of the screw part may cause the screw to loosen and suction may not be
Maintains airtightness in important places (places requiring closure)
The problem of being difficult to move occurs and the intended purpose can be achieved.
I knew it wasn't.

The present invention has been made in view of the above problems of the prior art.
It has been developed by the company and has elasticity on the surface of the substrate.
With the provision of a grid-like groove for fitting the sealing material
A concave portion is provided in each divided grid, and the bottom surface of the concave portion is formed.
In addition to providing a shaft hole for release on the back side of the board,
Connected to the suction part provided on the back side of the substrate around the shaft hole.
A first suction hole is provided through the bottom surface part,
Hold the work placed on the substrate by the negative pressure of
In the vacuum suction type work holder configured as
The benefit of having many suction holes.
The required and unnecessary suction holes can be opened and closed easily and securely.
Of vacuum suction type work holder
The purpose is.

[0007]

In order to solve the above problems, the present invention employs the following means. That is, a vacuum suction type work holder according to the present invention (hereinafter referred to as a work holder) is provided with a lattice-shaped groove portion 6 for fitting a sealing material 5 having elasticity on the surface portion of the substrate 3 and is partitioned. A recess 9 is provided in each grid 7, and a bottom surface 11 of the recess 9 is provided with a shaft hole 13 that is released to the back surface side of the substrate 3 and is provided around the shaft hole 13 on the back surface side of the substrate 3. The first suction hole 16 connected to the suction portion 15 is formed on the bottom surface 1
1 is provided so that the negative pressure from the first suction hole 16
Therefore, it is configured to hold the work placed on the substrate 3.
In the vacuum suction type work holder, the plate-shaped rotary valve 10 in which the second suction hole 21 which can communicate with the first suction hole 16 is provided in the recess 9 in the plate thickness direction,
The rotary shaft 20 projecting from the rear surface side is inserted into the shaft hole 13 and installed, and in the installed state, the surface 26 of the rotary valve 10 is sunk into the substrate surface 27 and the rotary shaft 20 is installed. There none as protrude to the reverse side of the substrate 3, protruding between the receiving portion 33 and the shaft hole peripheral portion 30 of the substrate back surface provided on the shaft portion 20a to leave, the bottom portion of the rotary valve 10 recess 9
Interposed a spring member 31 for urging the 11, also on the surface side of the rotary valve 10, set the engagement portion 25 which engages with the rotating tool
And the back surface 35 of the rotary valve 10 and the bottom of the recess 9.
A hole is formed between the face portion 11 and the surface portion 11 so as to communicate with the shaft hole 13.
And the first suction hole 16 and the second suction hole
It is characterized in that a rubber plate 12 perforated so as to communicate with 21 is interposed .

[0008]

In order to make the work holder 1 hold the work, for example, initially, all suction recesses (work 38
The first suction hole 16 and the second suction hole 21 are displaced with respect to the recessed portion 29 whose bottom is the rotary valve surface 26 and which is closed by the lower surface 40 of the rotary valve surface 26. It is cut off at 10. In this state, in order to ensure that the work piece is securely sucked and held even in the final working state, the elastic sealant is used to take into consideration the shape of the work piece and the final working state of the work piece. The groove 6 is fitted so as to draw a loop so as to come into contact with the portion in an elastically compressed state. After that, with respect to the rotary valve 10 existing on the back side of the work after processing, the rotary valve 10 is rotationally operated so that the first suction hole 16 and the second suction hole 21 are in communication with each other. After that, if the suction unit 15 is evacuated,
Since the air is exhausted in each of the suction recesses 29 on the (back surface of the work after processing) , the work W is in a required suction-held state within an extremely short time after the work is installed. Also, due to the influence of resistance and vibration during processing, the elastic seal material 5 and the workpiece W are
Even if the airtight state with and is partially broken, the exhaust speed is high, so that the suction-holding state returns to a stable state instantaneously.

Further , by using the spring member 31, the rotary valve 10 is
It is configured so as to urge toward the bottom surface portion 11 of the concave portion 9, and
Between the back surface 35 of the rotary valve 10 and the bottom surface portion 11 of the recess
To communicate with the first suction hole 16 and the second suction hole 21.
The rubber plate 12 perforated as described above is interposed. That
Therefore, the first suction hole 16 and the second suction hole 21 are not positioned.
If the rotary valve 10 is rotated in this state,
Due to the elastic compression of the rubber plate 12 due to the urging action of the member 31
Therefore, the airtightness between the rotary valve 10 and the bottom surface portion 11 of the recess is improved.
It can be increased extremely.

Moreover, on the front surface side of the rotary valve 10, a rotary
Since the engaging portion 25 for engaging with the tool is provided, this engaging portion
25 engage a rotating tool (eg screwdriver)
The opening / closing operation of the rotary valve 10 can be achieved by simply rotating
It can be done very easily.

Further , the rotary valve 10 is elastically moved by the spring member 31.
Since it is only pressed, the rotation operation of the rotary valve 10
When doing so, the frictional resistance increases for some reason,
When the resistance becomes high, the spring member 31 temporarily compresses
In this state, the rotary valve 10 can be displaced in the axial direction.
Therefore, the opening / closing operation of the rotary valve 10 is performed with a light rotary operation force.
It can be.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4, the work holder 1 according to the present invention is
A lattice-shaped groove portion for fitting a band-shaped elastic sealing material (for example, made of sponge rubber) 5 to the surface portion of the substrate 3 which is the upper portion of the rectangular parallelepiped box body 2 having a hollow inside. 6 is provided, and each of the divided grids 7 is provided with a recess 9, and a disk-shaped rotary valve 10 is installed in each of the recesses.

[0013] the bottom surface 11 of the recess 9 is provided at its center, a shaft hole 13 which opens on the back surface side of the substrate 3 is provided, on the periphery of the shaft hole 13, for example, on a circle of the axial hole 13 concentric 180
The first suction holes 16 and 16 connected to the suction portion (hollow portion of the box) 15 on the back surface side of the substrate are provided at an angular interval of 5 degrees so as to vertically penetrate the bottom surface portion 11. Also, the table of the bottom surface portion 11
An insertion hole 12a is formed on the surface so as to communicate with the shaft hole 13.
So as to communicate with the first suction hole 16
A rubber plate 12 having a through hole 12b is attached.
Further, a peripheral groove 17 is formed in an intermediate portion of the shaft hole 13, and the suction portion 15 is connected to an end portion of a suction pipe 19 connected to a vacuum pump.

The rotary valve 10 has a disk shape substantially equal to the inner diameter of the concave portion 9, and the insertion hole 12a and the insertion hole 12a are formed on the back surface thereof.
Through a fine axial hole 13 to project the rotary shaft 20 which projects required length into the suction unit 15. In the vicinity thereof, the through hole 12b
A second, which can be matched with the first suction hole 16
Suction holes 21 are vertically penetrated at an angular interval of 180 degrees. An O-ring 23, which can be elastically fitted to the peripheral groove 17, is elastically fitted in an annular groove 22 provided in the base end side portion of the rotary shaft 20. Further, an engaging portion 25 capable of engaging with the tip of the driver is provided on the surface side of the rotary valve 10, and the rotary valve surface 26 is formed so as to sink into the substrate surface 27.
The recess having the rotary valve surface 26 as the bottom serves as an adsorption recess 29.

Further, a disc spring 31a (spring member 31) capable of contacting the peripheral portion 30 of the shaft hole on the back surface of the substrate is fitted on the protruding shaft portion 20a on the back surface side of the rotating shaft 20, and the shaft portion 20a. 33a screwed onto the screw portion 32 of the
When the (reception part 33) is tightened as required, the spring member 31
Are in an elastically compressed state, and the urging action of the spring member 31 causes the back surface 35 of the rotary valve and the front surface 36 of the rubber plate 12 to rotate.
And are in a state of being elastically pressed (FIG. 3).

However, in order to hold the work in the work holder 1, for example, initially, as shown in FIG. 4, the first suction holes 16 and the second suction holes 21 are located in all the suction recesses 29. The first suction hole 16 is displaced so that the rotary valve 10
Keep it blocked by.

In this state, the shape of the work and the final working state of the work are taken into consideration so that the work is surely sucked and held even in the final working state.
As shown in FIGS. 3 and 5, the elastic sealing material 5 is fitted into the lattice-shaped groove portion 6 in a loop so that the elastic sealing material 5 contacts the peripheral portion of the back surface of the work W. In addition, in FIG. 5, since a drill hole is formed in the central portion of the work,
Through hole to be formed (shown by a chain line in FIG. 5)
All of the rotary valves 10a facing the portion 39 are in the shut-off state.

After that, with respect to all of the rotary valves 10 to be present on the back side of the processed workpiece, the rotary valve 10 is rotated so that the first suction holes 16 and the second suction holes 21 are in communication with each other. . After that, if the suction unit 15 is evacuated,
Since the airtightness is maintained by the elastic seal material 5 in the compressed state and exhausted in each of the suction recesses 29 on the back side of the workpiece, the workpiece W is in a required suction-held state within a very short time after the workpiece is installed. .

Even when the airtight state between the elastic seal material 5 and the work W is partially broken due to the influence of resistance and vibration during processing, the exhaust speed is high, so that a stable suction and hold state is instantly obtained. Return to.

FIG. 6 shows a shaft portion 20a protruding to the back side of the substrate.
Another embodiment of the present invention in which a coil spring 31b (spring member 31) is interposed in a slightly compressed state between a snap ring 33b (reception portion 33) fitted to the shaft and a peripheral portion 30 of the shaft hole on the back surface of the substrate. Is shown.

[0021]

According to the present invention, it is provided on the surface of the substrate.
Drill the first suction holes in correspondence with each partitioned grid.
Due to the holes, it is very efficient even if the shape of the work is different.
It is possible to perform good suction and hold, and each grid
By providing a rotary valve on the side, it is not necessary depending on the shape of the workpiece.
It is possible to close the rotary valve of each grid at the place where
Yes, and therefore the suction effect of the suction holes of each grid where needed.
The rate can be increased. Moreover, it is necessary and unnecessary
Before opening and closing the suction hole of the place, using the screw type plug member
Compared to the conventional type described above, it is easier to operate and
With the rubber plate interposed, the airtightness is greatly enhanced.
It has a remarkable effect that it can be performed reliably.
It is a thing.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a suction concave portion provided on a substrate, a concave portion and a rotary valve forming the suction concave portion.

FIG. 3 is a cross-sectional view illustrating a configuration of a main part of the present invention in a use state in which a first suction hole is opened.

FIG. 4 is a cross-sectional view illustrating a state in which a first suction hole is blocked.

FIG. 5 is a plan view illustrating a state in which an elastic seal material is fitted into a lattice-shaped groove portion provided on a substrate in consideration of a form of a work and a final processing state thereof.

FIG. 6 is a cross-sectional view for explaining another embodiment of the present invention in its usage state.

FIG. 7 is a perspective view illustrating a conventional suction type work holder.

FIG. 8 is a cross-sectional view illustrating a usage state of a conventional work holder.

FIG. 9 is a plan view illustrating a state where an elastic seal member is fitted in a lattice-shaped groove portion of a conventional work holder.

[Explanation of symbols]

 1 Work Holder 3 Substrate 5 Elastic Seal Material 6 Groove 7 Grid 9 Recess 10 Rotating Valve 11 Bottom of Recess 13 Shaft Hole 15 Suction Part 16 First Suction Hole 20 Rotation Shaft 21 Second Suction Hole 25 Engagement Part 26 Front surface of rotary valve 27 Substrate surface 31 Spring member 33 Receiving portion 35 Back surface of rotary valve 36 Bottom surface of recess

Claims (1)

[Scope of utility model registration request] 1. A lattice-shaped groove portion 6 for fitting a sealing material 5 having elasticity is provided on a surface portion of a substrate 3, and a concave portion 9 is provided in each of the divided lattice cells 7, and the concave portion 9 is formed. the bottom portion 11, the periphery of the shaft hole 13 provided with a shaft hole 13 to release the back surface side of the substrate 3, bottom surface of the first suction holes 16 communicating with the suction portion 15 provided on the back surface side of the substrate 3 1
1 is provided so that the negative pressure from the first suction hole 16
Therefore, it is configured to hold the work placed on the substrate 3.
In the vacuum suction type work holder described above, the second portion that can communicate with the first suction hole 16 is provided in the concave portion 9.
Plate-shaped rotary valve 10 in which suction holes 21 of the
The rotary shaft 20 projecting on the back side of the rotary shaft 20.
It is inserted and inserted into the container, and in the installed state, the rotary valve 1
The surface 26 of 0 is sunk into the surface 27 of the substrate, and the rotary shaft 20 is projected toward the rear surface of the substrate 3 ,
The rotary valve 10 is provided on the bottom surface of the recess 9 between the receiving portion 33 provided on the protruding shaft portion 20a and the peripheral edge portion 30 of the shaft hole on the rear surface of the substrate.
A spring member 31 that urges toward the portion 11 is interposed, and an engaging portion 25 that engages with a rotary tool is provided on the surface side of the rotary valve 10.
The rear surface 35 of the rotary valve 10 and the recess 9 are provided.
Between the bottom surface portion 11 and the bottom surface portion 11, a hole is formed so as to communicate with the shaft hole 13.
The first suction hole 16 and the second suction hole
With the rubber plate 12 punched so as to communicate with the hole 21
A vacuum suction type work holder.