JPS6310192Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a material feeding device that can adjust the amount of material fed during processing operations.

Coil material, sheet material, etc. to the processing position of a press machine, etc.
Alternatively, there is a gripper feed as one of the material feeding devices that automatically feeds a predetermined amount of material such as a profiled material.

This gripper feed is configured to feed a predetermined amount of material to a processing position by reciprocating a movable clamp section that clamps the material between fixed members having a fixed clamp section on one side when feeding the material. It is something. The reciprocating motion of the movable clamp section and the vertical motion of the clamp plate are
A piston, generally driven by a pressure fluid.
A cylinder mechanism is used.

By the way, this type of material feeding device has various structures depending on the thickness and width of the material to be fed, the feeding amount, the feeding speed, etc. As an example, the structure shown in FIG. 1 is known. There is.

The material feeding device shown in FIG. 1 is a gripper feed that uses compressed air as a driving source, and is located between a main body 1 in which a pneumatic circuit, etc. is built-in, and a fixed clamp part 3 in which a clamp plate 2 is disposed. , guide rod 4
This results in a configuration in which a movable clamp section 6 having a clamp plate 5 is disposed. A piston rod 7 of a piston-cylinder mechanism provided in the main body 1 is connected to the movable clamp portion 6, and compressed air is alternately introduced into the front and rear ends of the cylinder that clamps the piston. , the movable clamp section 6 reciprocates within a section regulated by the main body 1 and the fixed clamp section 3. Similarly, compressed air is introduced into the clamp plates 2 and 5, which are alternately opened and closed to clamp and feed the material 8 to the processing position. Reference numeral 9 denotes a pilot valve that is operated by a pressing member attached to the ram of a press machine, for example, and generates a signal for switching the pneumatic circuit in accordance with the vertical movement of the ram.

Furthermore, although not shown, a feeding length adjustment mechanism, a guide member for guiding the material 8 from the width direction, and the like are provided.

By the way, in recent years, for example, machining such as press working has become more precise, and the materials that can be handled have become extremely diverse. For example, in addition to ordinary metal materials, continuous machining of flexible materials such as ultra-thin metal sheets, paper tapes, plastic sheets, and ceramic sheets is now being performed.
In line with this, it is necessary for the material feeding device shown in FIG. 1 to feed the material in batches as described above.

In this case, for example, if the material itself elongates, the preset feed rate may not be secured.
Alternatively, there have been problems in that sufficient clamping force cannot be obtained and slipping occurs between the material and the clamp plate, resulting in insufficient feed or, conversely, overfeed.

Conventionally, when such an excess or deficiency in feed amount occurs,
Each time, the worker monitoring the processing machine temporarily stopped the processing machine and readjusted the feed length adjustment mechanism to obtain the appropriate feed length depending on the elongation of the material.

However, once the processing machine is stopped, the operating rate of the processing machine is significantly reduced, which has been a major obstacle to improving work efficiency. Moreover, this work of readjusting the feed length is a heavy burden on the operator.

The present invention has been developed in view of the above-mentioned circumstances, and detects the actual feed amount of the material on the introduction side of the material feeding device or the material coming out from the material feeding device, and detects excess or deficiency in the feeding length. If this occurs, the feed length can be adjusted without stopping the processing machine by moving one or more adjustment plates in and out between the fixed member that regulates the movement range of the movable clamp and the movable clamp. The object of the present invention is to provide a material feeding device that can automatically adjust the amount of material.

Hereinafter, an embodiment of the material feeding device according to the present invention will be described with reference to the drawings.

FIG. 2 is a side view, partially in section, for explaining the configuration of essential parts of an embodiment of the material feeding device according to the present invention. In FIG. 2, 11 is a main body in which a pneumatic circuit such as a cylinder of a piston-cylinder mechanism is built. Reference numeral 12 denotes a fixed clamp portion having a clamp plate 13 and fixed to the mounting plate 14. Further, the mounting plate 14 is provided with an introduction section 15 in which a roller for introducing the material 16 or the like is arranged as required. Reference numeral 17 denotes a movable clamp through which a guide rod 18 disposed between the main body 11 and the fixed clamp section 12 is slidably inserted, and which reciprocates between the main body 11 and the fixed clamp section 12 while being guided by the guide rod 18. A clamp plate 19 is disposed on the movable clamp section 17.

Further, reference numeral 20 denotes an adjustment plate section for adjusting the feed length, which is the gist of the present invention, and in this embodiment, it has two adjustment plates 20a and 20b. Reference numeral 21 denotes a driving section of the adjusting plate section 20, and the adjusting plate section 20 and the driving section 21 are arranged on a mounting plate 22.

Further, 23 is attached to the surface of the movable clamp section 17 facing the main body 11, and is attached to the mounting plate 22.
Alternatively, it is a spacer that abuts against the adjustment plates 20a and 20b, and these members are supported by the pedestal 24.

On the other hand, on the introduction side or the extraction side (in the illustrated embodiment, the introduction side) of the material 16 with respect to the feeding device, a feed amount detection section 25, the details of which will be described later, is disposed.
Furthermore, although not shown, the fixed clamp section 12 includes a feed amount adjustment mechanism for adjusting the fixed position of the fixed clamp section 12 according to the necessary feed amount before starting machining, and a mechanism for adjusting the feed amount to adjust the width of the material 16. A guide mechanism etc. for guiding from the direction is attached.

Next, the adjusting plate portion 20, which is the gist of the present invention, will be described in more detail with reference to Figs.

FIG. 3 is a cross-sectional view taken along the - line in FIG. 2 and viewed from the direction of the arrow, and FIGS. 4 and 5 are the arrows in FIG.
FIG.

Each adjustment plate 20a, 20 that constitutes the adjustment plate section 20
b is a pair of adjustment pieces 33 that rotate in opposite directions about the rotation shafts 31 and 32, respectively;
It is composed of a and 33b. And each adjustment plate 20
The adjusting pieces 33a, 33b of the adjusting pieces 33a, 20b are connected by gear parts 35a, 35b formed on the lower side, and approximately semicircular recesses 36a, 36b into which the guide rod 18 fits are formed on the upper side. has been done. Moreover, in the recesses 36a and 36b,
If necessary, a cushioning material is attached to soften the impact when colliding with the guide rod 18.

On the other hand, in this embodiment, the drive unit 21 is configured to include one adjustment piece 33 that constitutes each adjustment plate 20a, 20b.
It is composed of cylinder mechanisms 37a and 37b whose piston rods are connected to a and 33b. For example, by switching and introducing compressed air into the cylinder mechanisms 37a and 37b, the piston rod is driven to rotate the pair of adjustment pieces 33a and 33b in opposite directions about the rotation shafts 31 and 32, respectively. become.

In the state shown in FIGS. 3 to 5, the adjusting plate 20
The cylinder mechanism 37a connected to the piston rod 1 is operated, and the pair of adjustment pieces 33a are rotated in the directions A and B in the figure, respectively, so that the recess 36a is aligned with the piston rod 1.
8, and the amount of movement of the movable clamp portion 17 is adjusted to decrease by the thickness of the adjustment plate 20a. Further, in FIGS. 3 and 5, numerals 26 and 27 are a piston rod and a cylinder that serve as a drive mechanism for the movable clamp section 17.

In other words, the feed amount adjustment mechanism according to the present invention is as follows:
The movable clamp section 17 and the movable clamp section 17
The mounting plate 22 is a fixed member that regulates the movement section of the
One or more adjustment plates 20a,
The feed amount is adjusted by moving 20b in and out.

Next, the feed amount detection section 25 that generates a signal for driving the drive section 21 will be explained with reference to FIG.

Various methods can be considered for detecting the actual amount of movement of the material 16. For example, the detection unit 25 is installed on the material output side of the processing machine, and the feed rate is measured by electrically, magnetically, or optically detecting the hole or deformed part of the material 16 processed by the processing machine. Alternatively, there is a method in which marks are attached to the material 16 before processing at each predetermined length and the feed amount is determined by reading the marks.
A detection method in the case where slits or through holes 16a are formed in advance for each predetermined length of 6 will be described.

In FIG. 6, 41a, 41b and 42a, 42b are provided opposite to each other across the position where the through hole 16a of the material 16 is formed.
For example, it is a sensor unit consisting of a light emitting element and a light receiving element.

Now, it is assumed that the material 16 is being fed in the direction of arrow C in the figure, and in one feeding process, the through hole 16a passes through the sensor parts 41a and 41b and is detected here.
If it stops before reaching the sensor parts 42a, 42b, that is, if the through hole 16a stops near the _d1 position shown by the solid line in the figure, it is assumed that the preset feed length has been secured, and the drive part 21
No drive signal is sent to.

On the other hand, if the feeding of the material 16 is stopped before the through hole 16a reaches the sensor portions 41a, 41b in one feeding process, that is, the line _d2
If it stops before the position indicated by , the sensor section 41
No detection signal is sent from a, 41b. Therefore, the detection circuits 43 and 44 do not output detection signals, and the determination circuit 45 outputs a feed amount insufficient signal.

When the processing end signal from the processing machine side is given from the synchronization signal generating section 46, the synchronization circuit 47 is opened, and the insufficient feed amount signal formed by the discrimination circuit 45 is given to the drive circuit 48, for example. The solenoid valve 49 that switches the compressed air passage is switched, and the cylinder mechanism 37a is activated. This cylinder mechanism 3
The adjustment plate 2 shown in FIGS. 3 to 5 is adjusted by the operation of 7a.
0a is separated from the guide block 18, and the adjusting plate 20
The amount of movement of the movable clamp portion 17 increases by the thickness a, and an appropriate amount of feed can be obtained in the next feeding step.

Conversely, the through hole 16a is connected to the sensor 4 in one feeding process.
1a, 41b and the sensor parts 42a, 42b, that is, when the material 16 stops beyond the position _d3 shown by the two-dot chain line in the figure, a detection signal is output from both the detection circuits 43 and 44. Therefore, the determination circuit 45 forms an excess feed amount signal. This excess signal is then given to the drive circuit 49 side via the synchronization circuit 47, the solenoid valve 50 is switched, and the cylinder mechanism 37b is operated. As a result, the adjustment plate 20b shown in FIGS. 3 to 5 rotates in the directions of arrows A and B, and in addition to the adjustment plate 20a, the adjustment plate 20b also fits into the guide rod 18, and the clamp portion 17 moves by the thickness thereof. The amount of movement will be reduced, and an appropriate feed amount will be obtained in the next feeding process.

Therefore, without having to stop the processing machine,
The feed amount is automatically adjusted.

In this case, since this embodiment is equipped with two adjusting plates, for example, before starting machining, one adjusting plate 20a is fitted to the guide rod 18, and the position of the fixed clamp part 12 is adjusted. Adjust the feed amount. After that, the actual processing work begins,
If there is an excess or deficiency in the feed rate due to elongation or slippage of the material, the feed rate is automatically adjusted by moving the adjusting plates 20a and 20b in and out based on a detection signal from the detection unit 25. It is possible to adjust the feed amount in three stages.

The number of adjustment stages of the feed amount is determined by the number of adjustment plates, and by increasing the number of adjustment plates and the drive mechanism thereof, finer automatic adjustment of the feed amount becomes possible. However, in this case, the detection unit 25
The detection signal output from the sensor also needs to be subdivided accordingly.

Further, the shape of the adjusting plates 20a and 20b is not limited to the illustrated embodiment, and an appropriate shape can be selected according to the structure of the material feeding device itself. The present invention is not limited to the cylinder mechanism described above, and may be constructed using, for example, an electromagnetic plunger mechanism.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications without changing the gist thereof.

As described above, the material feeding device according to the present invention detects the actual feeding amount of the material, and if there is an excess or deficiency in the feeding amount, one or more sheets are inserted between the movable clamp part and the fixed member. By moving two adjustment plates in and out, the amount of movement of the movable clamp section, and therefore the amount of material fed, is automatically adjusted.

Therefore, the appropriate feed amount can be obtained without stopping the processing machine itself, and can be used for materials such as plastic materials and ultra-thin metal materials that tend to elongate or slip, resulting in incorrect feed amounts. It is extremely effective when feeding materials, and has the feature of improving the operating rate on the processing machine side.

Additionally, if an irregularity occurs in the feed rate, there is no need to temporarily stop the processing machine and readjust the feed rate, which greatly reduces the burden on the operator and improves work efficiency. The effects obtained from the above are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the schematic configuration of a gripper feed type material feeding device, FIG. 2 is a side view of essential parts showing an embodiment of the material feeding device according to the present invention, and FIG. Figure 4 is a front view of the main part taken along the - line in the figure and seen from the direction of the arrow.
Figure 5 is a side view of the main part seen from the direction of the arrow in the figure.
FIG. 3 is a plan view of the main part viewed from the direction of the arrow, and FIG. 6 is a block diagram for explaining the detection section in the same embodiment. 11... Main body, 12... Fixed clamp part, 1
3, 19... Clamp plate, 16... Material, 17...
...Moving clamp part, 18...Guide rod, 20
... Adjustment plate section, 21 ... Drive section, 22 ... Mounting plate, 3 ... Spacer, 25 ... Detection section.

Claims (1)

[Scope of utility model registration request] The movable clamp section reciprocates within a section regulated by a pair of fixed members each having a fixed clamp section disposed on either side, and the fixed clamp section and the movable clamp section alternately perform clamping operations. A material feeding device that transports a material to a processing position includes a feed rate detection unit that detects the feed rate of the material, and a piece that is disposed on the fixed member and that moves in and out between the fixed member and the movable clamp unit. Alternatively, a material feeding device is provided with a plurality of adjustment plates and an adjustment plate driving section that moves the adjustment plates in and out between a fixed member and a movable clamp section according to the output of the feed amount detection section.