JP2521529B2 - Work fixing base for caulking device and takeout method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caulking device used for fastening and fixing constituent members of a sheet metal product to each other, and more particularly to a horizontal caulking device having opposed machining heads. Of the work fixing table.

<< Prior Art >> As shown in FIG. 6, a sheet metal product having a structure in which side members 12 are fixed to both ends of a connecting member 11 (11a to 11d) has a tongue piece 14 formed at both ends of the connecting member 11. In many cases, a fixing structure is used in which the through hole is formed in the side member 12 and the tip is crimped and fastened. In such a case, the caulking work is performed by the processing heads 44 facing each other as shown in FIG.
Made by a horizontal caulking device equipped with a processing table
The connecting member 11 is loaded on the work fixing base 20 fixed to 62, the side members 12 are fitted into the projections at both ends thereof, and the table 62 is moved in the direction (X direction) perpendicular to the paper surface of the drawing and in the vertical direction (Z direction). The caulking position is adjusted to the machining head, and the machining head 44 is simultaneously advanced from both sides to perform the caulking work.

<< Problems to be Solved by the Invention >> In order to securely and satisfactorily finish the members without deforming the members due to the caulking work, the processing reaction force of the processing head 44 is connected to the side surface of the work fixing base 20. Element
The width dimension of the work fixing base 20 and the length of the connecting member 11 must be matched with high accuracy so that they can be received by 11 and 11 at the same time. Therefore, conventionally, at the stage of final adjustment of the caulking device, the length of the connecting member 11 is measured and the end surface of the work fixing base 20 is scraped according to this, but the work fixing base 20 is usually extremely Since this requires heavy and extremely high processing accuracy, there is a problem in that this processing requires skill, great care and time, and if it is cut too much by mistake, the entire work fixing base must be recreated. There was a problem of loss.

Further, due to the above-mentioned dimensional relationship between the work fixing base 20 and the connecting member 11, the side member 12 of the work after crimping is in close contact with the side surface of the work fixing base 20, and therefore the processed work is processed. When removing from the fixed base, the side member 12 must be removed by twisting with a screwdriver or the like, which is inefficient, and there is a problem that the work 10 may be scratched.

<< Means for Solving the Problems >> The present invention solves the above problems by making the work fixing table 20 have a unique structure and performing the work loading / unloading in a unique procedure. The work fixing base of the present invention is inserted into and removed from the stationary table 21 fixed to the processing table 62 of the caulking device, the movable table 22 provided on the side of the stationary table 21 so that the movable table 22 can be moved toward and away from the stationary table, and the movable table. The spacer block 23 is provided, and the pressing device 25 that presses them against each other is provided. The spacer block 23 can be automatically moved back and forth by the fitting / removing cylinder 26 and the like. Further, the moving table 22 can be automatically advanced and retracted by the pressing device 25, and these can also be automatically and sequentially operated by sequence control or program control. Of course, in addition to these, similarly to the conventional device, a gripping member 31 (33a to 33e) for temporarily holding the loaded connecting member 11 and the side member 12 and the opening / closing device 33 (33a to 33e) thereof are provided. It is provided as needed.

The spacer block 23 may have an integral structure, but
As shown in FIG. 10, a structure in which the adjusting piece 23b is incorporated into the base body 23a is convenient when the work fixing base is relatively large.

The operation procedure of the automated work fixing base is performed as follows. Upon completion of the work crimping work, the control device receives the end signal and releases the pressing force of the pressing device 25,
The spacer block 23 is retracted by operating the fitting / removing cylinder 26 and the like in the retracting direction. After confirming this retreat with the sensor 26h, etc., the pressing device 25 is reapplied with pressing force to move the moving table.
22 is brought close to the stationary table 21, and in this state, waits for a completion signal for taking out the work 10. This take-out completion signal is given manually or from an unloader attached to the caulking device. Upon receiving this take-out completion signal, the control device gives a backward movement command to the pressing device 25 to separate the movable table 22 from the stationary table 21, and the spacer block 23 in the gap formed between the stationary table 21 and the movable table 22. To advance. After that, the pressing device 25
To the stationary table 2 by giving the advance command to the
1. The spacer block 23 and the movable table 22 are held in a pressed state and wait until a crimping operation end signal is received.

<Operation> In order to match the width of the work fixing base 20 with the length of the work connecting member, the moving device 22 and the spacer block are pressed by the pressing device 25.
23 and the stationary table 21 in a state of being pressed, the width of the work fixing base 20 and the length of the connecting member 11 are measured to obtain the difference size between them, and the spacer block 23 or the adjustment piece 23b attached to this from the work fixing base. The end surface is removed, the end surface is processed by an amount corresponding to the difference size, and the work fixing base 20 is assembled again.
If too much is cut by mistake, prepare a new spacer block or adjustment piece and repeat the above procedure.

When the work fixing table 20 of the present invention is manually operated, after the caulking work is completed, the pressing force of the pressing device 25 is released to retract the spacer block 23, and then the moving table 22 is moved toward the stationary table 21. Then, the side member 12 of the work and the end surface of the work fixing base 20 are separated from each other, and the processed work is removed in this state. After removing the work, move table 22
Is moved to the outside, the spacer block 23 is advanced, the moving table 22 is pressed by the pressing device 25, and the next work is processed.

When the work fixing table 20 is automatically operated,
The work may be taken out and loaded at a time point corresponding to the sequential operation, and upon receipt of the completion signal, the work fixing base 20, the table 62 and the processing unit 40 start the operation of the next process.

<< Example >> FIG. 5 shows an example of a caulking device in which the workpiece fixing base of the present invention is used. In the figure, 51 is a base, 52 is a head support, and 40 is a processing unit mounted on the head support. The machining unit 40 rotates the tool pin 42 (see FIG. 1 (d)) at the tip of the machining head with the motor 41 and advances the tool pin 42 with the cylinder 43 to pinch the work 10 and tongues protrudingly formed on the work. The piece 14 is crushed to fix the members 11 and 12 to each other. Generally, the entire processing unit 40 is slidably mounted on a support base 52, and has a structure in which the entire processing unit can be retracted during setup or the like.

61 is an X that is mounted so as to be movable in the direction perpendicular to the paper surface of the figure.
The direction moving table 62 is a working table mounted on the moving table 61 so as to be vertically movable, that is, movable in the Z-axis direction. These tables are servomotors 63, 64 as schematically shown in FIG. Is moved and positioned by the ball screws 65 and 66, and the machining position of the work is opposed to the tool pin 42 by the positioning. In addition, in the structure shown in FIG. 5, a rear plate 67 is erected on the moving table 61.
67 is provided with a lifting guide 68 for the processing table 62,
A servo motor 64 for raising and lowering the table is attached to the upper end of the rear plate 67. The work fixing base 20 is fixed to the processing table 62, and the work 10 is loaded on the work fixing base.

As shown in FIGS. 2 and 6, the workpiece 10 to be processed is composed of connecting members 11 (11a to 11d) and side members 12 (12a, 12b), and tongue pieces projecting from both ends of the connecting member 11. .. are inserted into the through holes of the side member 12, and the tip end thereof is crushed by the tool pin 42 and caulked to fix the connecting member 11 and the side member 12. Reference numeral 13 shown in FIG. 2 is a positioning hole for fixing the connecting member 11 to the work fixing base 20.

The work fixing table 20 is moved between the stationary table 21 fixed to the machining table 62, the movable table 22 which is mounted on the stationary table 21 so as to be close to and separated from the stationary table 21, and the stationary table and the movable table separated from each other. The spacer block 23 is provided for retracting and retracting.
The guide rail of the movable table 22 is indicated by reference numeral 24 in FIGS. 7 and 8, and is substantially integrated with the stationary table 21. 25 is a cylinder for pushing the moving base 22, 26 is a cylinder for moving the spacer block 23 forward and backward, and an air cylinder is used in the embodiment apparatus, and a sensor 25h for detecting the forward and backward movement end of these cylinders is used. , 25r and 26h, 26r are provided as schematically shown in FIG. 1 (a). Stationary stand
21 is provided with a positioning bar 27 extending to the left and right, and the positioning bar 27 is provided with a positioning pin 28 that fits into the positioning hole 13 of the work. Therefore, the connecting member 11 is positioned by the stationary table 21 regardless of the position of the moving table 22.

The moving table 22 is provided with a gripping member for securely fixing the tongue piece 14 forming portion of the connecting member 11 at least at the end position of the work fixing table 20. This gripping member is schematically indicated by reference numeral 31 in FIG. 1, and gripping members of various shapes are indicated by reference numerals 31a ... 31e in FIGS. These gripping members are swingably or slidably mounted on the moving table 22 and are opened and closed by the cylinders 33a, ..., 33e, etc., and when they are closed, the connecting member 11 is sandwiched between the holding table 11 and the moving table 22. Therefore, the upper surface of the moving table 22 has a shape that matches the cross section of the connecting member 11. As required, the stationary table 21 and the movable table 22 are provided with a work detection sensor schematically shown in FIG. 1 (a).
Provide 21w and 22w. Here, the sensor 21w detects the connecting member 11, and 22w detects the side member 12.

Next, the procedure of the caulking work will be described with reference to the flowcharts of FIGS. 1 and 3. FIG. 1 (a) shows a work set preparation completed state. The spacer block 23 extends between the stationary table 21 and the movable table 22, and the pressing cylinder 25 of the movable table 22 presses the head end side of the movable table 22 and the spacer block 23 to the stationary table 21 side. are doing. In this state, first the work connecting member 11 is loaded, and the gripping member
31 is closed (FIG. 1 (b)). Next, the side member 12 is provided with tongue pieces having corresponding through holes protruding from both ends of the work fixing base 20.
It is inserted and fixed in 14 (Fig. 1 (c)).

When the completion of the above work is confirmed by an operator's command or a signal from the loader, if it is mounted, the caulking operation is started with the work presence signals of the sensors 21w and 22w as execution conditions. The caulking operation is performed by moving the tables 61 and 62 based on the preset X-Z coordinates of the caulking position, and after the table 62 is positioned, the tool pin 42 advances while rotating and pushes the tongue piece 14 at that position. The operation is performed in the order of crushing and then retracting the tool pin 42. Since there are usually a plurality of caulking positions, the table 62 is sequentially moved to a plurality of caulking positions and the above operation is repeated (FIG. 1 (d)).

When the work completion signal is input from the caulking device, the control device switches the air piping to release the pressure on the head end side of the pressing cylinder 25 and opens the gripping member 31. Next, the fitting and removing cylinder
The rod end side of 26 is pressed to retract the spacer block 23 (Fig. 1 (e)). After receiving the contraction completion signal of the fitting / removing cylinder 26 from the sensor 26h, the head end side of the pressing cylinder 25 is pressed again to bring the moving table 22 closer to the stationary table 21 (FIG. 1 (f)). In this state, the device stands by and receives a command from the operator that the work 10 has been removed or a signal from the unloader.If it is installed, the no-work signal of the sensors 21w and 22w is used as the execution condition. , The head end side of the pressing cylinder 25 is pressed to separate the moving table 22 from the stationary table 21, and the head end side of the insertion cylinder 26 is pressed after receiving the separation completion signal of the moving table from the sensor 25h, and the spacer block is pressed. 23 is advanced (Fig. 1 (h)), the head end side of the pressing cylinder 25 is pressed after receiving the spacer block advance completion signal from the sensor 26r, and the work set preparation complete state of Fig. 1 (a) is obtained. Return to.

FIG. 4 is a block diagram showing a control system for executing the crimping work of the above procedure, and a programmable controller is used for the control unit. The work presence / absence sensor in FIG. 4 is a sensor indicated by reference numerals 21w and 22w in FIG. 1 (a), and the air pressure sensor is a sensor for detecting the pressure applied to the pressing cylinder 25 and the release thereof. . Further, the servo motor is a servo motor indicated by reference numerals 63 and 64 in FIG. 2, the caulking machine is a machining unit indicated by reference numeral 40 in FIG. 5, and its position sensor is the advance / retreat cylinder 53 shown in FIG.
This is a sensor for detecting the forward / backward movement of the processing unit 40 due to. Further, each cylinder of the jig portion is designated by reference numeral 33a in FIG.
The position sensors of the cylinders denoted by ~ e are sensors for detecting the piston position of the cylinder, that is, the open / closed state of each gripping member 31a ~ e. The control unit advances the control to the next process while confirming the end of each process by each of these sensors.

6 to 9 show a more specific embodiment of the present invention. Since the basic structure and operation are the same as those of the first embodiment, the first embodiment will not be described. Only the structures not shown are briefly described.

The work to be processed by the work fixing base of the second embodiment is shown in FIG. 6, and the four connecting members 11a ...
・ Has 11d. The side member 12 is composed of a side plate 12a and a side column 12b erected with its base fixed to the outer side surface thereof, and the tongue pieces 14c at both ends of the connecting member 11c penetrate both the side plate 12a and the side column 12b. ing. The mounting positions of these connecting members 11 on the work fixing base 2 are shown in FIG. FIG. 8 is shown in a state where only 31b of the gripping members 31a ... 31e is closed. The first gripping member 31a is the dockle link 3
It is opened / closed by the cylinder 33a via 2 and holds the first connecting member 11a with the moving table 22. The closed second gripping member 31b is opened and closed by the cylinder 33b around the support shaft 34b as the swing center, and is connected to the moving base 22 by the second to fourth connecting members.
Holds 11b, 11c and 11d. In order to ensure the pressing force of the tip of the gripping member 31b, a pressing roller 35 that advances and retreats with a cylinder 36 is provided, and the roller 35 advances after the gripping member 31b is closed, and the gripping member 31b by a wedge action. Press the tip of. Further, in the workpiece fixing table shown in the figure, a third gripping member 31c for sandwiching the end portion of the second connecting member 11b, a fourth gripping member 31d for sandwiching the rear edge portion, and a standing wall of the fourth connecting member 11d. A fifth gripping member 31e that holds the portion is provided.
The third gripping member 31c moves forward / backward by the cylinder 33c mounted on the second gripping member 31b, the fourth gripping member 31d horizontally moves forward / backward by the cylinder 33d mounted on the moving table 22, and the spindle 34e moves the shaft 33e. The fifth gripping member 31e pivotally supported by the moving table 22 is opened and closed by a wedge 37 that moves forward and backward by a cylinder 33e and a return spring (not shown). The reason why such a large number of gripping members are provided is to securely fix the tongue projecting portion of each connecting member.

When the side pillars 12b and the like are erected on the side member 12 as in the workpiece shown in FIG. 6 and thus the thickness of the side member 12 is substantially different depending on the location, the machining unit 40 is adjusted according to the change in the thickness. Must be moved axially. The structure is shown in FIG. 9, 53 is an advancing / retreating cylinder of the processing unit 40, 54 is a receiving block, 55 is an elevating cylinder of the receiving block 54, and the elevating cylinder is a double cylinder, and the upper and lower and intermediate parts. It has three stop positions. The receiving block 54 is provided with a step 56 equal to the plate thickness of the side pillar 12b of the workpiece in the middle, and the receiving block 54 descends when the entire processing unit 40 is retracted during setup or the like, and the side pillar 12b. It is in an intermediate position when crimping a part, and rises when crimping another part. The illustrated position shows the receiving block 54 in the intermediate position. When the tool block 42 is retracted, pressure is applied to the head end side of the unit advancing / retreating cylinder 53 to move the elevating cylinder 55 to a predetermined position and then the rod end side of the unit advancing / retreating cylinder 53. It is performed by a sequential operation of applying pressure.

<< Advantages of the Invention >> According to the work fixing base of the present invention described above, a work that only moves the processed work can be removed from the work fixing base, and even if the work is manually removed, the automatic unloader is used. Even if it is performed by using, the work can be performed quickly and easily, and there is no fear of scratching the work. Also, in setup work,
The width of the work fixing base and the length of the connecting member can be matched by scraping the spacer block or the spacer piece attached to it, and it is not necessary to process the entire heavy work fixing base, so the work can be done easily and by mistake. Even if it is cut too much, the effect can be dealt with easily in a short time.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 1 is a diagram schematically showing the structure and work procedure of a work fixing base, FIG. 2 is a perspective view showing a work having a simple structure and its fixing base, FIG. 3 is a flowchart showing the operation procedure, FIG. 4 is a block diagram of the control system, and FIG. 5 is a front view of the entire apparatus. Figures 6 to
FIG. 10 is a view showing a more specific structure of the work fixing base. FIG. 6 is a perspective view of the work, FIG. 7 is a perspective view of the work fixing base, and FIG. 8 is a side view of the work fixing base. FIG. 9 is a partial front view showing the advancing / retreating mechanism of the processing unit, and FIG. 10 is a perspective view of the spacer block. In the figure, 10: Workpiece, 11: Connecting member 12: Side member, 14: Tongue piece 20: Workpiece fixing table, 21: Stationary table 22: Moving table, 23: Spacer block 25: Pressing cylinder, 26: Fitting / removing cylinder 40 : Machining unit, 62: Machining table

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shigeyuki Shibata 98, Unoki-nu, Unoki-cho, Kawakita-gun, Ishikawa 2 PFU Co., Ltd.

Claims (2)

(57) [Claims] 1. A stationary table (21) fixed to a processing table (62), a movable table (22) provided laterally on the stationary table (62) so as to be movable toward and away from the stationary table, and the stationary table and the movable table. A spacer block (23) that is fitted into and removed from the space and a pressing device (25) that presses these parts are provided. The spacer block (23) is driven forward and backward by the fitting and removing device (26), and the movable table (22) is Characterized by being driven forward and backward by the pressing device (25),
Work fixing base for the caulking device. 2. A work fixing base (20) and a movable base (2) mounted on the stationary base (21) so as to be movable in the approaching and separating directions.
2) and a spacer block (23) that is inserted and removed between the 2) and a pressing device (25) that urges the movable table (22) toward the stationary table (21), and the work (10) is crimped. After performing the pressing, the pressing force of the pressing device (25) is released, the spacer block (23) is retracted, the pressing force is applied to the pressing device (25) again, and the workpiece is put in a standby state. A method for taking out a work in a caulking device.