JPH0318155Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an automatic opening/closing device for a work floor, and uses a special industrial robot to perform welding, painting, soldering, assembly, press processing, etc. on various workpieces.
When performing other types of work, protect workers safely from obstacles or harmful substances such as sparks, metal fragments, chips, oil droplets, etc. that are generated during the work, and create a reasonable working environment. The robot is designed to open and close automatically in conjunction with the action of the robot, allowing for highly efficient work.

To take welding work as an example, in the past, curtains were hung over the work floor, and workers entered the enclosed room and worked while wearing light-blocking masks. The work environment is extremely closed, giving workers a sense of psychological pressure and early fatigue, which is not only unfavorable in terms of work efficiency and safety, but also makes it extremely inconvenient to get in and out of the room. .

What's more, this sort of fixed curtain partition cannot immediately respond to the automation of work by recent welding robots. Therefore, in practice, such automatic machinery cannot be installed without any protection.
Workers are walking around the area, temporarily assembling workpieces, but it is clear that the work is too dangerous.

Similar problems also apply to metal stamping, fusing, soldering, painting, assembly, and other automated operations, including welding sparks, processing debris, and chips emitted during these operations. ,
Peripheral equipment is required to safely protect workers from obstacles or harmful substances such as oil droplets, and to never reduce their work efficiency.

The present invention aims to provide an automatic opening/closing device for a work floor that meets these demands, and its specific configuration will be explained in detail based on the illustrated embodiment. The applied present invention is illustrated, and in Figures 1 to 5, M represents an arc welding robot (automatic welding machine).
It is a general term for the welding jig stand devices attached as a pair around R, and consists of the installation stand 10 fixed to the work floor, the slide drive unit 11 assembled to this, and the drive unit 11. It consists of a slide plate 13 that is linearly moved back and forth in the front-back direction along a guide rail 12 on a mounting base 10, and a jig table 14 that is detachably and replaceably assembled on the slide plate 13.

Therefore, a workpiece (not shown) that is clamped by a welding jig (not shown) on the jig table 14 is automatically carried into the working area of the welding robot R by the reciprocating movement of the slide plate 13.
It will be carried out, and the worker will use the jig table 1.
After temporarily assembling the workpieces on 4, it is sufficient to operate a switch on the control panel (not shown).

Reference numeral 15 denotes a stand column installed in an upright manner at a position midway between both welding jig stand devices M, and its installation location can be changed by means of a seat 16 fixed to its lower end. The support column 15 is made of a hollow rectangular metal pipe material, and a pair of left and right slide guide units 17 are assembled in the middle thereof. As is clear from FIGS. 6 and 7, each of the guide units 17 is formed from the following members.

That is, in both figures, 18 is a slide guide rail with a constant stroke length that is press-worked from a metal plate into a substantially letter-shaped cross section, and is connected to the support column 1.
5 by bolts 19.
20 slides within the guide rail 18,
It is a slider that moves up and down along the pillar 15,
It is irremovably engaged with the rail 18 via a large number of balls 21 that are self-held therein. As can be seen from the figure, the slider 20 is made up of two corrugated metal plates that are overlapped and integrated by studs 22, and a steel ball 21 is enclosed in the gap between the overlapped metal plates so as to be able to roll. That's obvious.

As suggested from FIG. 2, three sliders 20 are provided for each guide rail 18, and three sliders 20 are provided at the top, middle, and bottom at a constant interval W.
arranged in tiers. A mounting base 23 that is common to all three of the guide rails 18 is fixed and integrated so as to cover the open surface side of the guide rail 18. 24 is the slider 20
These reinforcing plates are also joined and fixed to the mounting base 23 in three pieces with bolts 25 so as to correspond to the mounting base 23 in the lower position.
The one fixed to is assembled into a roughly L-shape in order to support an air cylinder, which will be described later.

Further, 26 is a connector attached to each of the three reinforcing plates 24, which includes a connector main body 27 that is directly screwed into the reinforcing plate 24, a wedge ring 28 that tightens the shielding body, which will be described later. Wedge ring 2
8 and a tightening cap nut 29 screwed onto the connector body 27 in order to cause the connector body 8 to contract. Therefore, the main bodies 27 of the connector 26 are also arranged in three stages, upper, middle and lower, with the above-mentioned constant interval W in correspondence with the slider 20.

A shield 30 is detachably connected to the mounting base 23 of the slider 20 by a connector 26, and includes, for example, a holding frame 31 bent into an elongated shape from a hollow pipe material, and a reinforcing bar 32 thereof.
A membrane 33 stretched within a partitioned frame including
It also consists of nonflammable hangings 34 made of elastic material suspended from the holding frame 31. Although the membrane 33 in the figure is made of synthetic resin with properties such as heat insulation and light shielding for welding work, it can of course be made of any suitable material that has the necessary protective functions depending on the various types of work. Appropriate surface treatment may also be applied.

In that case, the holding frame 31 of the shield 30 is shown in the figure.
Although the installation height of the shield 30 is determined to be relatively low by connecting it to both the connectors 26 at the middle and lower positions, as suggested by the chain lines in FIG. Based on the stepwise arrangement of the Ws, the holding frame 31 can be connected to both the connectors 26 at the upper and middle positions by changing their positions, so to speak. In other words, depending on the size of the workpiece, welding jig, standing height, etc.
The structure is such that the installation height of the shield 30 can be changed. As long as the configuration is changeable, it goes without saying that it is not limited to the top, middle, and bottom three levels as shown in the figure.

Furthermore, 35 is a shield 30 and its slider 20.
The air cylinder serves as an operating mechanism for raising and lowering the air cylinder, and a pair of left and right air cylinders are fixedly installed at the bottom of the support column 15. 36 is a mounting bracket for fixing the same, and 37 is a protective cover for the cylinder 35, which is also attached to the support column 15. The piston rod 38 of the cylinder 35 is screwed into the reinforcing plate 24 of the slider 20 in the lower position, and is connected and fixed by a lock nut 39. Of course, a hydraulic cylinder or other elevating mechanism may be used in place of the air cylinder 35. 40 is the limit switch cover,
41 is a rail reinforcing metal fitting, and 42 is a light shielding cover.

The automatic opening/closing device for a work floor according to the present invention and the jig stand device M of the welding robot R installed on the work floor are operatively connected to each other as follows. That is, as is clear from FIGS. 1 and 2, when the work is carried into the welding robot R by the forward movement of the jig table 14, the shield 30 moves downward to block the table 14. Then, the automatic welding work can be performed by the robot R safely for the operator.On the other hand, when the table 14 moves backward and forwards and the workpiece is carried out from the robot R, the shield 3 is removed by the air cylinder 35.
0 moves upward to take out the welded workpiece and prepare for the next welding (temporary assembly of the workpiece, etc.). This means that the shield 30 is controlled to open and close automatically.

When performing such opening and closing operations of the work floor,
By moving the shield 30 up and down along the support column 15, the jig table 14 can quickly pass through and block the shield, and in this sense, the movement of the welding robot R and its jig table device M can be easily controlled. It can be said that it is very useful for increasing the efficiency of automatic welding work and making effective use of installation space without any restrictions or negative effects. Furthermore, the hanging of the elastic sag 34 from the shield 30 allows the welding jigs clustered on the jig table 14, the various workpieces attached and set thereon, and the shield 30 itself to be rigid comrades. This makes it difficult for collisions to occur due to
The elasticity of the jig table 14 serves to absorb the jig, so to speak, and from this point of view, the passage of the jig table 14 can be made smoother and faster.

Furthermore, the ability to change the installation height of the shield 30 contributes to absorbing the crowding height of the welding jig and workpiece, and also functions effectively to completely shield the welding location from the workpiece. it is obvious. In the figure, the jig table 14 and the shielding body 30, which are operatively connected, are shown as a pair on the left and right, and are set so that they alternately perform the above-mentioned motion action.

As mentioned above, this invention uses welding, soldering,
The industrial robot R automatically applies predetermined actions such as painting, assembly, and press processing to the workpiece, and the industrial robot R is installed around the industrial robot R in pairs of adjacent robots. , and a pair of jig table devices M for automatically loading and unloading workpieces into and out of the working area of the industrial robot R, and a jig table device M installed at an intermediate position adjacent to both the jig table devices M. The stand column 15, a pair of slide guide rails 18 which are laid and fixed along the height direction of the stand column 15 as a pair corresponding to both jig table devices M, and a pair of slide guide rails 18 which are movable up and down along each guide rail 18. The slider 20, and a pair of shielding bodies 30 projected from each slider 20 to cross the top surface of the jig table device M so as to partition the boundary position between the loading state and the unloading state of the workpiece by the jig table device M. and a pair of air cylinders 35 fixedly installed on the stand column 15 in order to raise and lower the pair of sliders 20 alternately in conjunction with the loading and unloading of the work by the jig table device M, Since the installation height of the shield 30 relative to the stand column 15 is set so that it can be changed according to the workpiece, all of the conventional problems mentioned at the beginning can be solved, and various tasks by the robot can be performed more efficiently. It has the effect of ensuring safety and a reasonable environment during the work while being well-performed.
While making effective use of the limited work floor, it is also possible to easily integrate the system with robots.

Furthermore, since the overall configuration of the device is extremely simplified, it is possible to maximize the effectiveness of mass production, and it can be used not only for welding work as in the illustrated embodiment, but also for soldering, fusing, painting, and pressing. It can be widely used in processing and other types of automatic work, and is of great practical benefit as a tool to protect workers from obstacles or harmful substances such as sparks, chips, metal fragments, and oil droplets that are generated during the work. It can be said that being able to change the set height of the shielding body 30 also works extremely effectively.

[Brief explanation of the drawing]

The figures illustrate the present invention applied to automatic welding work by robots. Figure 1 is a schematic plan view of its use, Figure 2 is a front view, and Figure 3 shows its welding jig table device and 4 is a partially enlarged partially cutaway sectional view taken along the line A-A in FIG. 3, FIG. 5 is a sectional view taken along the line BB in FIG. 4, and FIG. 6 is a side view with the robot omitted. 7 is a partially enlarged side view showing an extracted slide guide unit, and FIG. 7 is an enlarged sectional view taken along line CC in FIG. 6. R...Welding robot, M...Welding jig table device,
15...Stand support, 12, 18...Slide guide rail, 17...Slide guide unit,
20...Slider, 23...Mounting base, 26
... Connector, 30 ... Shield, 35 ... Air cylinder.

Claims (1)

[Scope of claim for utility model registration] An industrial robot R that automatically applies predetermined actions such as welding, soldering, painting, assembly, and press processing to a workpiece, and a pair of two adjacent robots. a jig stand device M that is attached to and installed around the industrial robot R as a unit and that automatically carries in and out workpieces into and out of the working area of the industrial robot R in pairs; A stand column 15 installed at an intermediate position between adjacent jig table devices M, a slide guide rail 18 laid and fixed along the height direction of the stand column 15 as a pair corresponding to both jig table devices M, A pair of sliders 20 that can move up and down along each guide rail 18, and a top surface of the jig table device M from each slider 20 so as to partition the boundary position between the loading state and the unloading state of the work by the jig table device M. A pair of shields 30 projected across the area and a pair of sliders 20 are fixed to the stand column 15 so as to be moved up and down alternately in conjunction with the loading and unloading of the workpiece by the jig stand device M. An automatic opening/closing device for a work floor, comprising a pair of installed air cylinders 35, and characterized in that the installation height of the shield 30 with respect to the stand support 15 can be changed depending on the workpiece.