JP3726927B2 - Cylinder work pressing and fixing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cylinder-type workpiece pressing and fixing device for pressing and fixing a workpiece to the upper surface of a workpiece mounting base, and in particular, a cylinder-type workpiece pressing and fixing suitable for fixing a sample to a sample table of a hardness tester. Relates to the device.
In addition, in an automatic machine, it can also be used for a fixing device that fixes a work in a predetermined position in order to accurately deliver the work to the next processing machine.
[0002]
[Prior art]
As a cylinder-type workpiece pressing and fixing device as described above, a device as shown in FIG. 2 has been known.
That is, in FIG. 2, the code | symbol 1 has shown the base | substrate, The workpiece mounting base 2 is provided in this base | substrate 1. FIG.
Further, a cylinder support 3 is provided on the base 1, and a pneumatic cylinder 4 is attached to the cylinder support 3.
[0003]
A rod 5 is fitted into the cylinder 4 so as to be movable up and down, and a work pressing element 7 is attached to an upper end portion of the rod 5 via an arm 6.
A compressed air supply pipe 8 is connected near the upper end of the cylinder 4. When pressurized air is supplied from the compressed air supply pipe 8, the rod 5 is driven downward. It is pressed and fixed to the upper surface of the base 2.
[0004]
Further, the cylinder support 3 is provided with a sensor 11 that detects the completion of pressing and fixing the upper portion by detecting the stop of the downward movement of the piston portion 5 a provided at the lower end portion of the rod 5. Reference numeral 12 denotes a limit sensor for detecting the top dead center of the piston portion 5a, that is, the upper limit of movement of the rod 5. Reference numerals 11a and 12a denote lead wires, respectively.
[0005]
[Problems to be solved by the invention]
By the way, in the conventional cylinder type workpiece pressing and fixing device as described above, since the cylinder is fixed, the position of the piston portion 5a of the rod is different when the thickness of the workpiece 9 is different when the pressing and fixing of the workpiece by the cylinder device is completed. Is different.
[0006]
On the other hand, a sensor with a narrow sensitivity range is used to increase detection accuracy. Therefore, when multiple workpieces with different thicknesses are targeted, the number of sensors can be accurately detected to detect the completion of workpiece pressing and fixing. However, there is a problem that the thickness variation of the workpiece must be limited (actually a very narrow range) according to the sensor mounting position.
The present invention is intended to solve such problems.
[0007]
[Means for Solving the Problems]
The present invention relates to a cylinder-type workpiece pressing and fixing device in which a workpiece is pressed and fixed to the upper surface of a workpiece mounting base provided on a base by a cylinder device, and the cylinder and the cylinder are fitted and movably moved up and down. A pressure fluid is supplied to the cylinder in order to drive the rod downward in order to press and fix the work to the upper surface of the base. And a pressure fluid supply means, and the cylinder is mounted on a cylinder support provided on the base so as to be movable up and down, and a sensor for detecting completion of pressing of the workpiece by the workpiece pressing element is provided. As a means to solve the problem.
[0008]
In the fixing device, a piston is provided at the lower end of the rod, and the one sensor is provided in the cylinder near the bottom dead center of the rod as means for solving the problem.
[0009]
In the cylinder type workpiece pressing and fixing device according to the present invention, the thickness of the cylinder-type workpiece pressing and fixing device can be increased by simply providing one sensor at a specific location, for example, near the bottom dead center of the piston portion, by simply mounting the cylinder to the cylinder support so as to move up and down. It is possible to deal with all kinds of workpieces.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a cylinder type workpiece pressing and fixing device as an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view thereof (partially cut). In FIG. 1, the same reference numerals as those in FIG. 2 indicate substantially the same members.
[0011]
In this embodiment, the pneumatic cylinder 4 is attached to the cylinder support 3 so as to be movable up and down.
That is, a vertical groove 3a in the vertical direction is formed in the cylinder support base 3, and a base portion of the cylinder holder 13 is fitted into the vertical groove 3a so as to be vertically movable. A cylinder 4 is attached to the tip of the cylinder holder 13. A rod 5 is fitted into the cylinder 4 so as to be movable up and down, and a work pressing element 7 is attached to an upper end portion of the rod 5 via an arm 6.
Further, a sensor 11 is mounted on the cylinder 4 near the bottom dead center of the piston 5a, and a limit sensor 12 is mounted near the top dead center of the piston 5a.
[0012]
In the above configuration, when pressurized air is supplied from the vicinity of the upper end of the cylinder 4 via the compressed air supply pipe 8, the rod 5 is pushed down and the workpiece 9 is pressed against the upper surface of the workpiece mounting table 2 by the workpiece pressing element 7. . At the same time, the cylinder 4 itself is lifted upward together with the cylinder holder 13 while being guided by the vertical groove 3a by the reaction force of the workpiece pressing force.
[0013]
That is, when the pressing and fixing of the work 9 by pressing down the rod 5 is completed, the piston portion 5 a of the rod 5 is always located at the bottom dead center regardless of the thickness of the work 9.
Therefore, by adopting a configuration in which the cylinder 4 is attached to the cylinder support 3 so as to be movable up and down, it is possible to cope with any workpiece having different thicknesses by providing only one sensor 11 near the bottom dead center of the piston portion 5a. Become.
The pressing and fixing of the workpiece 9 is released by supplying compressed air from below the cylinder 4.
[0014]
In this embodiment, the cylinder holder 13 is attached to the cylinder support 3 so as to be movable up and down, and the cylinder 4 is attached to the cylinder holder 13. However, the cylinder 4 shown in FIG. The same effect can be obtained even if the cylinder support base 3 is inserted so as to be movable up and down.
[0015]
In any case, since the cylinder 4 moves in the vertical direction, the compressed air supply pipe 8 is formed of a flexible member, or the compressed air supply pipe 8 is connected to the compressed air source via a flexible hose. It is necessary to be configured to connect to (not shown).
In addition to compressed air, pressurized oil may be used as the pressure fluid.
[0016]
【The invention's effect】
As described above in detail, according to the cylinder-type workpiece pressing and fixing device of the present invention, it is possible to detect pressing and fixing of workpieces having different thicknesses by one sensor, reducing the manufacturing cost and the range of use (workpieces). An advantage is that it is possible to expand the limit range of the change in thickness of the substrate.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a cylinder-type workpiece pressing and fixing device according to an embodiment of the present invention, partially cut away.
FIG. 2 is a schematic side view showing a conventional cylinder-type workpiece pressing and fixing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Workpiece mounting base 3 Cylinder support base 3a Vertical groove 4 Pneumatic cylinder 5 Rod 5a Piston part 6 Arm 7 Work pressing element 8 Compressed air supply pipe 9 Workpiece
11 Sensor
12 Limit sensor
13 Cylinder holder

Claims (2)

  A cylinder-type workpiece pressing and fixing device in which a workpiece is pressed against and fixed to the upper surface of a workpiece mounting base provided on a base by a cylinder device, and a cylinder and a rod that is inserted into the cylinder so as to be movable up and down. , A work pressing member attached to the tip of the rod, and a pressure fluid supply means for supplying pressure fluid to the cylinder to drive the rod downward to press and fix the work to the upper surface of the base The cylinder is attached to a cylinder support provided on the base so as to be movable up and down, and one sensor for detecting completion of pressing and fixing the workpiece by the workpiece pressing element is provided. A cylinder-type workpiece pressing and fixing device.   2. The cylinder-type workpiece pressing and fixing according to claim 1, wherein a piston portion is provided at a lower end portion of the rod, and the one sensor is provided in the cylinder near a bottom dead center of the rod. apparatus.

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