Work table for wood working machine or the like
First Claim
1. A work table for a wood working machine or the like, comprising:
- a hollow table body having an upper plate and a lower plate and defining a chamber therein between said upper and lower plates, said chamber being capable of being put into a negative pressure condition;
a plurality of supporting cylinders mounted for individual upward and downward sliding movement in a juxtaposed relationship on said table body to extend upwardly through and from said upper plate of said table body;
an attracting pad provided at an upper end of each of said supporting cylinders, each of said supporting cylinders having an air sucking passageway formed therein for communicating said attracting pad with said chamber, said air sucking passageway having a lower end opening at a lower end face of the supporting cylinder;
a spring for urging each of said plurality of supporting cylinders downwardly to contact the lower end face of each of the supporting cylinders with a seat portion in said chamber to close said lower end opening of said air sucking passageway;
a pneumatic cylinder disposed in each of said plurality of supporting cylinders for driving each respective supporting cylinder to move upwardly against the corresponding spring; and
a valve device for controlling supply and discharge of compressed air into and from each of the pneumatic cylinders.
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Accused Products
Abstract
A workpiece is placed on a plurality of supporting cylinders which are projected upwardly from an upper plate or a hollow table body. All of the supporting cylinders normally assume a lowered position at which lower end faces thereof contact seat portions in a chamber of the table body so that attracting pads provided at upper ends of the supporting cylinders are disconnected from the chambers. Accordingly, even if the chamber is put into a negative pressure condition, the workpiece is not attracted to the attracting pads. Then, compressed air is supplied to the pneumatic cylinders of those supporting cylinders which fall within a horizontal area of the workpiece to lift those supporting cylinders. Consequently, the lower end faces of those supporting cylinders are spaced away from the seat portions to allow communication between the attracting pads and the chamber by way of air sucking passageways formed in the supporting cylinders to suck air through the attracting pads. As a result, the workpiece is attracted to the attracting pads and thus fixed to the lifted supporting cylinders.
27 Citations
10 Claims
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1. A work table for a wood working machine or the like, comprising:
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a hollow table body having an upper plate and a lower plate and defining a chamber therein between said upper and lower plates, said chamber being capable of being put into a negative pressure condition; a plurality of supporting cylinders mounted for individual upward and downward sliding movement in a juxtaposed relationship on said table body to extend upwardly through and from said upper plate of said table body; an attracting pad provided at an upper end of each of said supporting cylinders, each of said supporting cylinders having an air sucking passageway formed therein for communicating said attracting pad with said chamber, said air sucking passageway having a lower end opening at a lower end face of the supporting cylinder; a spring for urging each of said plurality of supporting cylinders downwardly to contact the lower end face of each of the supporting cylinders with a seat portion in said chamber to close said lower end opening of said air sucking passageway; a pneumatic cylinder disposed in each of said plurality of supporting cylinders for driving each respective supporting cylinder to move upwardly against the corresponding spring; and a valve device for controlling supply and discharge of compressed air into and from each of the pneumatic cylinders. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification