JPH05187430A - Sucking structure and sucker - Google Patents

Abstract

PURPOSE:To provide a simple sucking structure and a sucker in which only a part carrying thereon a workpiece is automatically set in a sucked condition, in a sucking and fixing means for fixing the workpiece under vacuum suction force CONSTITUTION:A sucking structure (a) has a large diameter suction chamber 2 opened at its upper part, and a small diameter suction hole 3 formed in the bottom part of the chamber 2, piercing therethrough. A valve 4 adapted to be floated up and down, depending upon variation in the pneumatic pressure in the chamber 2 is attached so as that the upper end of the hole 3 is covered therewith. Further, a sucker is composed of several such sucking structures (a) arranged on a given board.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction structure for positioning and sucking a workpiece by vacuum suction, and a suction disc using the suction structure.

[0002]

2. Description of the Related Art Wooden products, such as doors and surface plates (hereinafter referred to as "workpieces") of wood cabinets, have various kinds of decorative processing applied to their surfaces. It is necessary to position and fix the parts in place, and labor saving in the setup work such as positioning directly leads to a reduction in production cost. Therefore, we have achieved a reduction in setup costs for mass-produced products of a certain shape by using frame jigs, but there is a problem in terms of the cost required for jig production in the production of various small quantities. In order to solve the problem, a suction plate by vacuum suction has been proposed, but in setting the work, the block pieces of the suction chambers arranged in large numbers on the suction plate must be removed within the suction part. The action is time-consuming and does not improve the work efficiency as expected.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides an extremely simple suction structure and suction cup in which only a set portion of a work is automatically sucked in a vacuum suction technique.

[0004]

The suction structure of the first invention is a suction structure comprising a large-diameter suction chamber having an open top and a small-diameter suction port penetrating the bottom of the suction chamber. The upper end of the mouth is covered with a valve that floats due to atmospheric pressure fluctuations in the suction chamber.

The adsorption structure according to the second invention is the adsorption structure according to the first invention, wherein one end of the valve is fixed and a slight gap is formed at the upper end of the intake port and the valve is held by a predetermined elastic force.

The suction plate of the third invention comprises a large number of the suction structures of the first invention or the second invention arranged on a required disk.

[0007]

When a valve for receiving atmospheric pressure sucks a required atmosphere at a predetermined low vacuum and a work is placed on the upper part of the suction chamber, the suction chamber becomes a vacuum state at the vacuum and the valve floats. In this state, when the degree of vacuum is set to a predetermined high degree of vacuum, the suction chamber in which the work is placed strongly sucks and positions the work, and the suction chamber in the part where the work is not placed The valve is in close contact with the bottom of the suction chamber with a high suction force in addition to the atmospheric pressure, and is in a state of not sucking air.

[0008]

EXAMPLE The present invention will be described by way of example. The suction structure a shown in FIG. 1 has a required thickness and is made of a non-breathable disc body 1, and the upper end thereof is opened in a required elliptical (or circular) area. Then, a suction chamber 2 dug to a required depth and a small-diameter intake port 3 penetrating the bottom of the suction chamber 2 are provided, and one end is provided at the upper end of the intake port 3 (bottom surface of the suction chamber 2). The (right end) is screwed and the other end is covered with a valve 4 made of an elastic material that is turned upside down by an elastic internal stress. The suction structure a shown in FIG. The packing 5 is attached to FIG.
In the suction structure a shown in FIG. 5, the valve 4 is composed of a combination of an elastic body and a leaf spring 6, and the leaf spring 6 is screwed to the bottom of the suction chamber 2 so that the elastic body formed to have a desired contour is introduced into the intake port 3. The adsorption structure a shown in FIG. 4 is formed by contacting the packing 5 attached to the upper peripheral surface, and one end of the valve 4 which is entirely made of an elastic material is fixed to the bottom surface of the suction chamber 2, and the other on the fixed center. The end is engaged with the upper end of the spring 7 having a required elastic force, and the lower end of the spring 7 is housed in the recessed hole 8 dug in the suction chamber 2. Further, the suction structure a shown in FIG. 5 is a suction structure including a large circular suction chamber 2 and a small-diameter suction port 3 which are concentrically dug, and a valve 4 housed in the suction chamber 2 has a central portion. It is floated upward, and the outer peripheral edge is simply placed on the bottom surface of the suction chamber 2 (or the upper surface of the packing 5 that is attached to the bottom surface of the suction chamber 2), and the outer peripheral edge is evenly arranged as shown in FIG. A ventilation path 9 is provided around the top of the intake port 3 so as to be sufficiently separated from the periphery of the intake port 3, and in practical use, a packing 10 that also serves as a retainer for the valve 4 as shown by an imaginary line is provided. It is used by being attached to the upper end of the suction chamber 2.

The suction structure a thus constructed is provided as a plurality of suction disks b arranged as shown in FIG. 7, and is mounted and fixed on a frame (not shown) of a predetermined processing machine (router or the like). The front surface (opening side of the suction chamber 2) is used as the mounting surface of the work 11, and the back surface is connected to the vacuum suction system. In this case, work 1
On the mounting surface of No. 1, the packing 10 is attached to the upper edge of the suction chamber 2 as shown in FIG. 8 or is used via the pedestal jig 12 as shown in FIG. .

Next, the state in which the work 11 is positioned and fixed on the suction plate b will be described in detail. During vacuum operation at a predetermined low degree of vacuum, the valve 4 attached to the bottom of the suction chamber 2 is a spring 7 or a plate. Due to the elastic force of the spring 6 or internal stress, there is a slight gap at the upper end of the intake port 3 against the suction force at the vacuum level, and the intake port 3 is not completely closed. is there. When the work 11 is placed at an arbitrary position on the suction board b in this state, the suction chamber 2 on which the work 11 is placed is placed.
Immediately becomes a vacuum state, suction force does not act on the valve, and the valve 4 is held in a state where the intake port 3 is further opened.
If suction is performed at a predetermined high degree of vacuum from this state, the work 11
The suction chambers 2 on which the workpieces 11 are mounted strongly adsorb and position the work 11 on the suction plate b, and the valves 4 are strongly sucked in the suction chambers 2 open to the atmosphere, and the bottom surface of the suction chambers 2 or the bottom surface The upper surface of the packing 5 attached to the above is closely contacted, and the intake port 3 is completely closed. If the pedestal jig 12 is used,
The pedestal jig 1 is provided by the frictional resistance due to the suction force between the packing 13 provided around the upper surface of the jig 12 and the lower surface of the work.
2 and the work 11 are integrated, and the base jig 12 is the jig 1
2 is firmly positioned on the suction cup b by the frictional resistance between the packing 13 and the upper surface of the suction cup b provided around the lower surface of the suction cup b. As shown in FIG. 10, the suction structure a has a suction seat 14 formed of a friction body or the like.
Mass production can be provided as well. In this case, it is only necessary to machine the board 1 by simple drilling, and each valve 4
Since the work of assembling is eliminated, the manufacturing cost can be reduced. Further, if the suction board b is attached to the hand of the robot for carrying out and carrying out, the work 1 having a recessed groove on a certain plane.
1 and the like can be transferred by suction.

[0011]

As described above, in the adsorption structure a of the present invention, the valve that opens due to the fluctuation of the atmospheric pressure in the suction chamber automatically opens the intake port in the suction chamber where the work is placed.
In the suction chamber in which no work is placed, the valve strongly closes the intake port, and the suction plate b in which a large number of the structures a are arranged.
Can easily position and fix a workpiece in any posture, which reduces setup costs, and when used as a robot hand, a workpiece with a machining surface such as a depressed groove can be transferred by suction. It also has a ripple effect that can be utilized.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an example of an adsorption structure a according to the present invention.

FIG. 2 is a vertical sectional view of another embodiment of the adsorption structure a of the present invention.

FIG. 3 is a vertical sectional view of another embodiment of the adsorption structure a of the present invention.

FIG. 4 is a vertical sectional view of another embodiment of the adsorption structure a of the present invention.

FIG. 5 is a vertical sectional view of another embodiment of the adsorption structure a of the present invention.

6 is a plan view of a valve in the adsorption structure a shown in FIG.

FIG. 7 is a plan view showing a state where a work is placed on the suction plate b of the present invention.

FIG. 8 is a vertical cross-sectional view showing an example of use of the adsorption structure a of the present invention.

FIG. 9 is a vertical cross-sectional view showing an example of use of the suction plate b of the present invention.

FIG. 10 is a vertical cross-sectional view showing a state in which the suction structure a of the present invention is attached to a board as a suction seat.

[Explanation of symbols]

 1 Board 2 Suction Chamber 3 Inlet 4 Valve 5 Packing 6 Leaf Spring 7 Spring 9 Ventilation Path 11 Work 12 Pedestal Jig 13 Adsorption Seat

Claims (3)

[Claims] 1. A suction structure comprising a large-diameter suction chamber having an opening at the top and a small-diameter suction port penetrating the bottom of the suction chamber, wherein a valve that floats at the upper end of the suction port due to atmospheric pressure fluctuations in the suction chamber. Adsorption structure formed by covering. 2. The adsorption structure according to claim 1, wherein the valve is fixed at one end and has a slight gap at the upper end of the intake port and is held by a predetermined elastic force. 3. A suction plate comprising a large number of suction structures according to claim 1 or 2 arranged on a required plate.