JPH0671039U - Vacuum suction type work holder - Google Patents

Abstract

(57) [Summary] [Purpose] Use vacuum to hold and hold work stably. In addition, the preparation work for sucking and holding the work is performed simply and quickly. [Structure] The surface of the substrate 3 is provided with lattice-shaped grooves 6 for fitting the elastic sealing material 5. The rotary valve 10 is installed in the concave portions 9 provided in each divided grid, and the rotary valve surface 2
An adsorption recess 29 having a bottom surface 6 is formed. By rotating the rotary valve 10, the first suction hole 16 provided on the bottom surface of the recess is provided.
Open and close.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vacuum suction type work holder that sucks and holds a work by using a vacuum.

[0002]

[Prior art]

 As a conventional work holder for sucking and holding a work by using a vacuum, those shown in FIGS. 7 to 9 are provided. The work holder is provided with a lattice-shaped groove portion c on which the band-shaped elastic sealing material b is fitted on the surface side of the substrate a, and the groove portion c is provided with a suction hole e connected to the suction portion d for a predetermined time. It was provided in several places at intervals. In order to ensure that the work f is securely sucked and held even in the final working state, at least one suction hole e is formed in the closed space formed by the fitting of the elastic sealing material. Carefully set where the work should be placed so that it is included.

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

By the way, the reason why the number of 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 management of the lid member. It is thought that

[0005]

[Problems to be solved by the device]

 However, the conventional work holder has the following problems. Considering the shape of the work to be suction-held and the final processing state of the work, the installation location of the work must be carefully set so that there is at least one suction hole e on the back side of the work. was there. In particular, when a plurality of works are arranged on the substrate surface and adsorbed and held at the same time, the works cannot be arranged unless the arrangement state is carefully considered.

In the closed space portion formed by the fitting of the elastic sealing material, only one or at most two suction holes are present, so the exhaust speed is not so high. , It took a long time to hold the work piece in the required state by suction. In particular, if the airtight state between the elastic seal material and the workpiece is partially broken due to the influence of resistance and vibration during processing, the workpiece cannot be returned to the stable suction-holding state instantaneously, resulting in a large accident. There was a risk of inviting.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention employs the following means. That is, a vacuum suction type work holder (hereinafter referred to as a work holder) according to the present invention is provided with a grid-like groove portion 6 for fitting an elastic sealing material 5 on the surface portion of a substrate 3 and is partitioned. Further, each grid 7 is provided with a concave portion 9, and a bottom surface portion 11 of the concave portion 9 is provided with a shaft hole 13 which opens to the back surface side of the substrate and a suction hole provided on the back surface side of the substrate around the shaft hole 13. A first suction hole 16 connected to the portion 15 is provided so as to penetrate the bottom surface portion 11, and a second suction hole 21 that can communicate with the first suction hole 16 is formed in the recess 9 in the plate thickness direction. The installed plate-shaped rotary valve 10 is mounted by inserting the rotary shaft 20 projecting on the rear surface side into the shaft hole 13 and in the mounted state, the surface 26 of the rotary valve is the substrate surface 27. The rotary shaft 20 projects toward the back side of the substrate. In other words, by the biasing action of the spring member 31 interposed between the receiving portion 33 provided on the projecting shaft portion 20a and the shaft hole peripheral edge portion 30 on the back surface of the substrate, the back surface 35 of the rotary valve and the bottom surface 36 of the recess are formed. Is in an elastic pressure contact state, and an engaging portion 25 for engaging a rotary tool is provided on the surface side of the rotary valve 10.

[0008]

[Action]

 However, in order to hold the work on the work holder 1, for example, first, all suction recesses (recesses closed by the lower surface 40 of the work 38 and having the rotary valve surface 26 as the bottom surface) 29 are first The first suction hole 16 and the second suction hole 21 are displaced from each other and the first suction hole 16 is blocked by the rotary valve 10.

In this state, in order to ensure that the workpiece is sucked and held even in the final processing state, the elastic sealing material is adjusted by considering the shape of the workpiece and the final processing state of the workpiece. A loop is drawn and fitted in the groove 6 so as to come into contact with the peripheral portion of the back surface of the work 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 rotated so that the first suction hole 16 and the second suction hole 21 are in communication with each other. However, when the rear suction unit 15 is in a vacuum state, the workpiece W is sucked and held as required within a very short time after the workpiece is installed, because the suction is carried out in each of the suction recesses 29 on the back surface of the workpiece. .

Further, even if 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 holding state is obtained. Return instantly.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 4, a work holder 1 according to the present invention has a strip-shaped elastic sealing material (for example, sponge rubber) on a surface portion of a substrate 3 which is an upper portion of a rectangular parallelepiped box body 2 having a hollow interior. 1) is provided with a grid-like groove portion 6 for fitting therein, and a recess 9 is provided in each partitioned grid 7, and a disc-shaped rotary valve 10 is installed in each of the recesses.

A surface layer portion of the bottom surface portion 11 of the recess 9 serves as an adhesive layer of the rubber plate 12, and a shaft hole 13 that opens to the back surface side of the substrate 3 is provided in the center thereof, and the periphery of the shaft hole 13 is provided. The first suction holes 16, 16 connected to the suction portion (hollow portion of the box) 15 on the back surface side of the substrate are provided on the bottom surface of the bottom hole portion at an angular interval of, for example, 180 degrees on a circle concentric with the shaft hole 13. 11 is provided so as to penetrate vertically. 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 recess 9, and a rotary shaft 20 penetrating the shaft hole 13 and projecting a required length into the suction portion 15 is projected on the back surface of the rotary valve 10. Set up. A second suction hole 21 which can be matched with the first suction hole 16 is vertically provided around the periphery thereof at an angular interval of 180 degrees. Further, 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 that can be engaged with the tip of a driver is provided on the surface side of the rotary valve 10, the rotary valve surface 26 is formed so as to sink into the substrate surface 27, and the rotary valve surface 26 is a bottom surface. The place is a suction recess 29.

Further, a disc spring 31 a (spring member 31) capable of abutting the shaft hole peripheral portion 30 on the back surface of the substrate is fitted to the protruding shaft portion 20 a on the back surface side of the rotation shaft 20, and the shaft portion 2 The nut 33a (the receiving portion 33) screwed into the screw portion 32 of 0a is tightened as required to bring the spring member 31 into the elastically compressed state. The back surface 35 of the rotary valve and the bottom surface of the recess (the surface of the rubber plate 12) 36 are in elastic contact with each other (FIG. 3).

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

In this state, the shape of the work and the final processed state of the work are taken into consideration so that the work is surely sucked and held even in the final processed state, as shown in FIGS. 3 and 5. In this way, the elastic sealing material 5 is fitted in 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 the central portion of the workpiece is drilled, all of the rotary valve 10a facing the through hole (shown by the alternate long and short dash line in FIG. 39) to be formed is cut off. It is in a state.

After that, with respect to all of the rotary valves 10 that are 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, when the suction portion 15 is placed in a vacuum state, airtightness is maintained by the elastic sealing material 5 in the compressed state and the air is exhausted in each of the suction recesses 29 on the back side of the work. In addition, the work W is in a state of being suction-held as required.

Further, 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 obtained. Return instantly.

FIG. 6 shows that a coil spring 31b (spring member 31) is provided between the snap ring 33b (receiving portion 33) fitted to the shaft portion 20a protruding to the back side of the substrate and the shaft hole peripheral edge portion 30 on the back surface of the substrate. 7 shows another embodiment of the present invention which is interposed in a slightly compressed state.

[0021]

[Effect of device]

 The present invention has the following excellent effects. In the work holder according to the present invention, a grid-like groove for fitting a band-shaped sealing material is provided on the surface of the substrate, and a recess is provided at each partitioned grid, and the rotary valve installed in the recess is appropriately provided. The rotation operation controls whether or not the suction recess is in the suction state. Therefore, unlike the conventional work holder described above, it is not necessary to determine the installation location of the work in relation to the suction hole, and the work may be installed at any location on the substrate surface. Further, since it is possible to easily control whether or not the suction recess is brought into the suction state by rotating the rotary valve, the conventional method, that is, the attachment and detachment of the lid member is troublesome, and the lid member can be managed easily. Compared with the conventional lid member attachment / detachment method, which is complicated, the preparatory work for holding and holding the work can be performed simply and quickly. These advantages are remarkable when a large number of works are arranged and adsorbed and held on the substrate surface.

Since the number of suction portions increases as the work to be held becomes larger, the work is installed in comparison with a conventional work holder that suctions from a small number of suction holes to form a vacuum state. After that, it is in a state of being adsorbed and held as required in an extremely short time. In addition, even if the airtight state between the elastic seal material and the work partly breaks due to the influence of resistance and vibration during processing, the exhaust speed is high and the stable suction-holding state is returned instantly. Therefore, it is possible to solve the conventional problem that the adsorption and holding of the work becomes unstable.

[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 Sealing 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 surface portion 11 is provided with a shaft hole 13 that opens to the back surface side of the substrate, and a first suction hole 16 that is continuous with the suction portion 15 provided on the back surface side of the substrate is provided around the shaft hole 13 to form the bottom surface portion 11. A plate-shaped rotary valve 1 having a second suction hole 21 penetrating therethrough and having a second suction hole 21 that can communicate with the first suction hole 16 in the plate thickness direction.
0, the rotary shaft 20 projectingly provided on the back side thereof
3 is inserted and installed, and in the installed state, the surface 26 of the rotary valve is made to sink into the substrate surface 27, and the rotary shaft 20 is projected to the rear surface side of the substrate, and the projecting shaft portion 20a. The back surface 35 of the rotary valve and the bottom surface of the recess 36 are brought into elastic pressure contact with each other by the urging action of the spring member 31 interposed between the receiving portion 33 provided on the back surface of the substrate and the peripheral portion 30 of the shaft hole on the back surface of the substrate, and the rotation A vacuum suction type work holder characterized in that an engaging portion 25 for engaging a rotary tool is provided on the front surface side of the valve 10.