JPH02299793A - Work table device - Google Patents

Abstract

PURPOSE:To obtain this device for especially carrying out satisfactorily a work without hooking it to the upper end of a first work supporting member by constituting its device so that a large interval can be obtained between a supporting position of the work by a second work supporting member and the upper end of a first work supporting member without increasing necessary driving force of a second work supporting member. CONSTITUTION:When a work is supported at the time of laser beam machining, a free bearing 25 is in a rolled-down position of the lower part than the upper end of a needle-like supporting member 21. Also, the supporting member 21 is in a normal work supporting position, and brings the work to point-like support in a roughly horizontal state. Moreover, at the time of supporting the work so as to be slidable by the bearing 25 from the above supporting position, all of supporting rods 23 are turned clockwise, and the bearing 25 is turned and moved to an erect position shown by a virtual line from the rolled-down position. Furthermore, when the bearing 25 is position in the erect position, its upper face comes to be positioned in the upper part than the upper end of the supporting member 21 existing in the normal work supporting position. Accordingly, the work is raised from the upper end of the supporting member 21, and supported so as to be slidable in a roughly horizontal state by the bearing 25 instead of the supporting member 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a work table device, and particularly to a pincushion type work table device used in a laser processing device or the like.

(Prior Art) In general, a needle-type work table device used in laser processing equipment, etc. has a plurality of needle-shaped first work supports each having a pointed upper end and supporting the work in a dotted manner on the pointed upper end. and a plurality of second work support members each having a rolling member such as a free bearing at an upper end and slidably supporting a work on the rolling member, the first work support member is fixedly arranged to support the workpiece during laser processing by laser beam irradiation, and the second workpiece support member is movable in the vertical direction and its rolling member is positioned above the upper end of the first workpiece support member. The workpiece is supported in a slidable manner by being selectively positioned in the
To allow workpieces to be carried in and out of a worktable smoothly and with good work efficiency when reloading the workpieces.

(Problem to be Solved by the Invention) In the above-mentioned needle-type work table device, when the workpiece is transferred from the supported state by the first workpiece supporting member to the supported state by the second workpiece supporting member, The second workpiece support member lifts the workpiece from the position supported by the first support member. The greater the lifting amount of the workpiece, the more difficult it is to cause problems such as the tip of the first support member getting caught in the cutting opening made in the workpiece when the workpiece is removed from the worktable. The amount of material lifted was immeasurable, and the problems described above were likely to occur. In particular, when the second workpiece support member stands up by rolling over or rotating from the tilted position, thereby lifting the workpiece from the first workpiece support member, as the amount of workpiece lifting increases, the second The distance from the rotation center of the first workpiece support member to its tip, the so-called rotation arm length, increases, and as the rotation arm length increases, the distance required to lift the workpiece from the first workpiece support member increases. The driving force for rotationally displacing the second workpiece supporting member increases. If there is a limit to this driving force, the amount by which the workpiece is lifted is naturally limited, and in many cases, the current situation is that the amount by which the workpiece is lifted can only be set to a quantity.

In view of the above-mentioned problems, the present invention aims to improve the position of the workpiece supported by the second workpiece support member and the upper end of the first workpiece support member without increasing the required driving force of the second workpiece support member. It is an object of the present invention to provide a work table device which is improved so that a large gap can be obtained between the first workpiece support member and the workpiece can be carried out from the worktable without being caught on the upper end of the first workpiece support member. The purpose is

[Structure of the Invention] (Means for Solving the Problems) According to the present invention, the above-mentioned object is to provide a plurality of first parts each having a pointed upper end and supporting a workpiece in a point-like manner on the pointed upper end. a workpiece support member; a plurality of second workpiece support members each having a rolling member at an upper end and slidably supports a workpiece on the rolling member; and the rolling member of the second workpiece support member. a first displacement means for displacing the second workpiece support member so that the upper surface thereof is selectively positioned above and below the upper end of the first workpiece support member;
This is achieved by a work table device comprising a second displacement means for displacing the first work support member between a normal work support position and a retracted position lower than the normal work support position.

(Function) According to the above configuration, since the first support member moves up and down in addition to the second support member, the first workpiece can be moved while the workpiece is supported by the second workpiece support member. By moving the support member to the retracted position, even if the amount of workpiece lifting by the second workpiece support member is not increased, the position where the workpiece is supported by the second workpiece support member and the upper end of the first workpiece support member is changed. The spacing between will be increased.

(Example) Examples of the present invention will be described in detail below with reference to the attached drawings.

FIG. 5 shows an example of a suitable laser processing apparatus incorporating a work table device according to the present invention. In FIG. 5, reference numeral 1 indicates the entire laser processing apparatus, and the laser processing apparatus 1 has a base frame 3 and a gate-shaped frame 5 provided straddling the base frame 3.

The portal frame 5 has an upper bridge 7 extending above the base frame 3 and across the base frame 3, and the Y-axis gear ridge 9 is attached to the upper bridge 7 in the extending direction of the upper bridge 7, that is, the base frame. It is provided so as to be movable in the direction across 3. A two-axis carriage 11 is provided on the Y-axis gear ridge 9 so as to be movable in the vertical direction.
A laser processing head 13 that emits a laser beam oscillated from a laser oscillator (not shown) is attached to the lower part of the Z-axis gear ridge 11.

A work table device 15 is provided on the base frame 3 so as to be movable in the extending direction of the base frame 3.

The work table device 15 has a rectangular frame 17, as shown in FIGS. 1 to 4.

A plurality of support bars 19 are provided within the frame 17 at predetermined intervals.
are arranged parallel to each other, and each of the support bars 19 has a plurality of needle-shaped workpiece support members 21, each of which is a first workpiece support member and has a sharp upper end, erected thereon.

A plurality of support rods 23, three in the illustrated embodiment, are arranged in parallel to each other in the frame 17 in a direction perpendicular to the extending direction of the support bar 19.
A plurality of free bearings 25 are attached to each of the free bearings 25. The support rods 23 are rotatably supported by the frame 17 with bearings 27 provided at both ends, and are supported by free bearings 25 as shown by solid lines in FIG.
The top surface of the free bearing 25 is located below the upper end of the needle-like workpiece support member 21, and the top surface of the free bearing 25 is located below the upper end of the needle-like workpiece support member 21, as shown by the imaginary line in FIG.
It is possible to rotate between the upright position located above the upper end of.

The support rods 23 have brackets 2 provided on each of them.
9 and bracket 29 are pivotally connected to each other by a linking ring 31 that pivotally connects them to each other, so that they can rotate in the same manner as each other. A frame 17 is attached to one end of the central support rod 23 among the three support rods 23.
A drive lever 33 is attached on the outside. A fluid pressure cylinder device 3 such as a pneumatic type is installed at the tip of the drive lever 33.
5 piston rods 37 are drivingly connected by pins 39. The fluid pressure cylinder device 35 has a bracket 4 fixed to the frame 17 at the base end of the cylinder tube 41.
3 is pivotally supported by a bottle 45.

The fluid pressure cylinder device 35 is constructed by moving the piston rod 37 to the left as seen in FIGS. 1 and 2 from the state as shown, and moving the support rod 23 with the drive lever 33 as seen in FIG. 2. rotating it in a clockwise direction, and driving it rotationally from the rolled-over position to the upright position;
By an operation opposite to this, the support rod 23 is rotationally driven from the upright position to the overturned position.

Support plates 47 are fixed to outer positions of the frame body 17 corresponding to both ends of the support bar 19, respectively. The support plates 47 each extend along the arrangement direction of the support bars 19 and support the vertically movable bars 49 so as to be movable up and down. The vertically movable bar 49 is provided for each support bar 19, and is connected to the bearing hole 5 of the slide bearing 53 by a slide shaft 51 erected at one end.
5 so as to be vertically movable between a raised position as shown by a solid line in FIG. 5 and a lowered position as shown by a phantom line in FIG. It has become. The vertically movable bars 49 are each connected to the support bar 19 at the other end by a bolt 57, and support the support bar 19 in a substantially horizontal state.

A fluid pressure cylinder device 59 is provided on the support plate 47 for each of the plurality of vertically movable bars 49 .

Each of the pneumatic or other fluid pressure cylinder devices 59 has its cylinder member 61 fixed to the support plate 47, and its piston rod 63 connected to the vertically movable bar 49 via the spacer 67 by the Poltro 5. A compression coil spring 69 is attached around the spacer 67, and the compression coil spring 69 acts between the support plate 47 and the vertical movement bar 49 to move the vertical movement bar 49 downward with respect to the support plate 47. It is energizing.

The supply and discharge of fluid pressure to and from the plurality of fluid pressure cylinder devices 59 are performed simultaneously by a general fluid pressure control circuit (not shown), and fluid pressure is applied to the fluid pressure cylinder devices 59. As a result, the piston rod 63 rises, and the vertically movable bar 49 rises against the spring force of the compression coil spring 69 to a raised position as shown by the solid line in FIG. By discharging the fluid pressure of the pressure cylinder device 59, the vertically movable bar 4
9 is moved by the spring force of a compression coil spring 69 to a lowered position as shown by the imaginary line in FIG.

In the figure, 71 indicates a work clamp device attached to the guide rail 73, 75 indicates a positioning pin device, and 77 indicates a positioning bin lifting device.

In the work table device 15 configured as described above, when supporting the work during laser processing, the third
As shown in the figure, the free bearing 25 is in the overturned position below the upper end of the needle-shaped support member 21, and fluid pressure is supplied to each of the hydraulic cylinder devices 59 to move the vertically movable bar 49. Since it is in the raised position, the needle-shaped workpiece support member 21 is in the regular workpiece support position,
At this regular workpiece support position, the workpiece is point-supported in a substantially horizontal state.

When the workpiece is to be slidably supported by the free bearing 25 when the workpiece is to be transferred from the above-mentioned workpiece support state, the fluid pressure cylinder device 35 is first actuated and the piston rod 37 of the workpiece is moved as shown in FIGS. 1 and 2. The drive lever 33 moves clockwise as seen in FIG.
3 all rotate clockwise at the same time, and the free bearing 25 rotates from the rolled position shown by the solid line in FIG. 3 to the upright position shown by the imaginary line. . When the free bearing 25 is in the upright position, its upper surface is located above the upper end of the needle-like workpiece support member 21 in the normal workpiece support position, and thus the free bearing 25 is placed on the needle-like workpiece support member 21. The workpiece that has been supported in this state is lifted from the upper end of the needle-like workpiece support member 21, and
Instead of 1, it is slidably supported in a substantially horizontal state by a free bearing 25.

Once the free bearing 25 is in the upright position as described above, the fluid pressure supply to the fluid pressure cylinder device 59 is then stopped, and the fluid pressure of the fluid pressure cylinder device 59 is discharged all at once. As a result, the vertically movable bar 49 comes to be lowered to the lowered position as shown by the imaginary line in FIG. It will now move downward from the position to the retreat position. This downward movement of the support bar 19 increases the distance between the workpiece supported by the free bearing 25 and the upper end of the needle-shaped workpiece support member 21.

Although the present invention has been described in detail with respect to specific embodiments above, the present invention is not limited thereto.
It will be apparent to those skilled in the art that various embodiments are possible within the scope of the invention.

[Effects of the Invention] As can be understood from the description of the embodiments as described above, in the work table device according to the present invention, the first work support member is provided separately from the free bearing that is the second work support member. Since the needle-like workpiece support member is also movable up and down, when the workpiece is supported by the free bearing, the distance between the workpiece and the upper end of the needle-like workpiece support member is equal to the lifting height of the workpiece by the free bearing. It comes to be increased without being accompanied by an increase in size. As a result, the distance between the workpiece supported by the free bearing and the needle-like workpiece support member can be set large without increasing the driving force of the free bearing required to lift the workpiece, and the workpiece can be reloaded. This ensures that problems such as the opening of the workpiece getting caught on the needle-like workpiece support member at times, etc., are reliably avoided, and the workability of reloading the workpiece is further improved.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the work table device according to the present invention, Fig. 2 is a view taken in the direction of arrow A in Fig. 1, and Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1. , FIG. 4 is an enlarged side view showing a part of the vertical movement mechanism of the needle-like workpiece support member, and FIG. 5 is an example of a suitable laser processing device incorporating the worktable device according to the present invention. FIG. 1... Laser processing device 3... Base frame 1
5...Work table device 19...Support bar 21...Acicular work support member 23...Support rod 25...Free bearing 35...Fluid pressure cylinder device 49...Vertical movement bar 51 ...Slide shaft 53
...Slide bearing 59...Fluid pressure cylinder device

Claims (1)

[Claims] a plurality of first work support members each having a pointed upper end and supporting a workpiece in a point-like manner on the pointed upper end; each having a rolling member at the upper end and slidably supporting the workpiece on the rolling member; a plurality of second work support members, and the upper surface of the rolling member of the second work support member is selectively positioned above and below the upper end of the first work support member. a first displacement means for displacing the second workpiece support member to a desired position, and a second displacement means for displacing the first workpiece support member between a normal workpiece support position and a retracted position lowered from the normal workpiece support position. A work table device comprising: