JPS62193718A - Chamfering device for hole-drilled plate - Google Patents

Abstract

PURPOSE:To improve efficiency of chamfering work, by detecting a position of many holes, drilled in a plate, by an optical sensor and moving tools to said position so as to automatically perform the chamfering work. CONSTITUTION:A hole-drilled plate to be chamfered is carried into between upper and bottom tools 5 by a roller conveyer 1. A sensor 3, which detects a hole position in the hole-drilled plate, is additionally provided in a tool lift means 2. Light from a light source 3b, mounted to a bottom lift means 2b, is received by the sensor 3 through a hole in the hole-drilled plate. A device, if it confirms the light to be received, actuates an upper surface retaining means 9 retaining the hole-drilled plate to be fixed. Next the device, which vertically moves the tools 5 from the upper and the bottom chamfers the hole of the hole-drilled plate, and the plate, if its chamfering is finished, is carried out via the conveyer 1.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a chamfering device for perforated plates such as splicing plates used for on-site joints of bridges, steel frames, etc.

<Prior Art and Problems> When joining bridges, steel frames, etc. on-site with bolts or rivets, splicing plates are used on both sides or one side of the joint.

Holes are drilled in the splicing plates for bolts and rivets to pass through, and the drilling is done with high efficiency by stacking a large number of splicing plates and using an NG multi-spindle drill or the like. Holes drilled in this way may have burrs due to the feed of the drill, and even if there is no burr, the edges of the holes are sharp, which poses a problem in terms of the durability of the joint, and also has a negative impact on painting. Therefore, chamfering of the hole is required. Conventional chamfering is done manually by attaching a chamfering tool to an air drill.
It was very time-consuming because I had to do each step one by one and then turn over the back side after finishing the front side.

<Object of the Invention> The present invention was devised in view of the problems of the prior art, and an object of the present invention is to provide a perforated plate chamfering device that automatically chamfers a perforated plate such as a splicing plate. shall be.

<Means for Solving the Problems> In order to achieve the above object, the perforated plate chamfering device of the present invention has a roller conveyor 1 for conveying the perforated plate and a chamfering mechanism B as shown in FIGS. 1 to 3. It is equipped with The chamfering mechanism B includes an elevating means 2 for elevating and lowering a pair of tools 5 for chamfering holes in a perforated plate on the roller conveyor 1 from above and below, respectively, and moving each elevating means 2 in a direction perpendicular to the conveying direction of the conveyor. The lateral movement means 7 detects when the required hole of the perforated plate has come to the required position corresponding to the tool on the conveyor, and the operation of the lateral movement means 7 moves the tool to the position corresponding to the required hole. It is equipped with a sensor 3 that detects when the vehicle has arrived. The sensor 3 consists of a light source 3b attached to one of the elevating means and a light receiving end 3a attached to the elevating means used, and the light receiving end 3a is open in a direction perpendicular to the direction of conveyance. and a lateral slit 3f through which light passes when the perforated plate passes between the sensors while the perforated plate is being conveyed by the conveyor, and a lateral moving means that is open along the conveyance direction of the conveyor. 7, the sensor 3 has a vertical slit 3g through which light does not pass when it passes through the required hole, and a light receiving element 3 disposed inside corresponding to the horizontal slit 3f and the vertical slit 3g.
It is characterized by having e.

<Function> The perforating plate is conveyed to the chamfering mechanism B by the roller conveyor 1. In the chamfering mechanism B, the tool elevating means 2 moves from the movement origin (
It is located at the left end of the chamfer mechanism B in Figure 1),
A sensor 3 attached to the tool elevating means 2 detects a hole near the origin of the first hole row of the blank plate through the horizontal slit 3 of the sensor.
The position of the hole in the conveyance direction is detected by the light passing through the hole when passing through f, and the conveyor is stopped when the position of the center of the chain hole in the conveyor conveyance direction coincides with the position of the tool axis in that direction. Next, while moving the tool elevating means 2 laterally,
When the vertical slit 3q passes through the hole, the horizontal position of the hole is detected by the light passing through the hole, and when the center position of the chain hole and the axis position of the tool coincide, the tool lifting means 2 is moved laterally. stop. At that position, the tool elevating means 2 is operated and the tip of the rotating tool is brought into contact with the hole to perform chamfering. After the chamfering is completed, the tip of the tool is retracted, the tool elevating means 2 is moved laterally again, and the next hole in the same row is chamfered in the same way. In this way, the holes in the row are sequentially chamfered, and when the chamfering of the holes in that row is completed, the tool elevating means 5 and the means 2 are returned to the origin, and the conveyor 1 is moved to move the holes on the origin side of the next row of holes. is detected and chamfering is performed on that column in the same way. When chamfering is completed for all rows of holes, the tool elevating means 2 returns to the origin, and the perforated plate on which chamfering has been completed is sent to the next process by the roller conveyor 1.

In addition, if the hole rows are not lined up perpendicularly to the conveyor conveyance direction but are lined up diagonally backwards when viewed from the origin, the tool When the elevating means 2 is moved horizontally, when the sensor 3 passes through the next hole in the row, the light that has passed through that hole first passes through the horizontal slit 3f, so when that light is detected, the sensor 3 stops the horizontal movement. Next, the conveyor 1 is moved until the position of the center of the hole in the conveyor transport direction coincides with the position of the tool axis in that direction, and then stopped. Then, the tool elevating means 2 is moved laterally again to make use of the vertical slit 3g so that the center of the hole and the axis of the tool coincide. With this procedure, it is possible to handle even if the hole row is oblique to the conveyor transport direction.

<Example> An embodiment of the present invention will be described below with reference to the drawings.

1 is a perspective view of the chamfering mechanism B of this device, FIG. 2 is a front view of the light receiving end 3a of the sensor 3, FIG. 3 is a bottom view of the light receiving end 3a, and FIG. 4 is a perspective view of the entire device, Fig. 5 is a perspective view of the plate sending mechanism A of this device, Fig. 6 is a side view of the plate sending mechanism A, Fig. 7 is a perspective view of the roller conveyor 1, and Fig. 8 is a perspective view of the finished product discharging mechanism C. , FIG. 9 is a sectional view of the finished product discharge mechanism, and FIG. 10 is a side view of the terminal end of the roller conveyor 1.

As shown in FIGS. 1, 4, and 7, the perforated board chamfering device of this embodiment includes a board delivery mechanism A1, a la conveyor 1, a chamfering mechanism B, and a finished product discharge mechanism C. .

The board feeding mechanism A and the finished product discharging mechanism C are installed facing the side surfaces of the starting end and the ending end of the roller conveyor 1, and the chamfering mechanism B is installed approximately at the center of the roller conveyor 1 so as to straddle the conveyor. The perforated plate is sent out from the plate sending mechanism A to the starting end of the roller conveyor 1, and is conveyed to the chamfering mechanism B by the roller conveyor 1.

After the chamfering is performed by the chamfering mechanism B, the perforated plates are conveyed to the terminal end of the roller conveyor 1, and from there, they are stacked by the finished product delivery mechanism C and transported to the outside by a forklift or the like.

As shown in FIGS. 5 and 6, the board delivery mechanism A includes a temporary storage stand 20 whose upper surface slopes downward toward the roller conveyor 1.

The upper surface of the temporary storage table 20 has a large number of bar-shaped members 21 arranged in parallel toward the conveyor 1, and the upper surface of the bar-shaped members 21 has a large number of rollers 22 arranged thereon. Temporary stand 20
An electrically driven retractable stopper 23 is located midway in the slope direction of the upper surface of the
is provided, and the front of the stopper 23 is the storage section 20a.
, and the rear thereof is the feeding section 20b. Foldable stopper 2
3 has a large number of stopper rods 23b fixed to a rotating shaft 23a installed below the bar-shaped member 21 in a horizontal direction perpendicular to the bar-shaped member 21. By rotating the rotating shaft 23a, the stopper rods 23b are erected. When I let it go,
The stacked perforated plates placed on the upper surface of the bar-shaped member 21 are stopped, and when the rotary shaft 23a is rotated and the stopper rod 23b is brought down, the tip of the rod is attached to the bar-shaped member 21.
The perforation plate is lower than the upper surface so that it slides down the upper surface of the crosspiece member 21. A stopper 25 is provided near the side surface of the roller conveyor 1 at the lower end of the slope of the temporary storage table 20.

The stopper 25 is equipped with a stopper plate 25a suspended by a plurality of jacks 25b so that its height can be adjusted freely, and only one perforated plate can pass through the bottom of the stopper plate 25a to be transferred onto the conveyor. It looks like this.

The height of the stopper plate 25a is adjusted according to the thickness of the perforated plate. A plurality of plate delivery chains 24 driven by an electric motor 24m are provided between the bar-like members 21 from the upstream side of the stopper 25 to slightly downstream thereof. chain 24
is attached with a short claw 24a, and when the claw 24a runs toward the conveyor 1, it hooks the bottom plate of the stacked perforated plates and sends the perforated plate onto the conveyor 1. It looks like this.

As shown in FIG. 7, the roller conveyor 1 has a large number of conveyor rollers 1b arranged on a frame 1a, a chain sprocket is installed at the end of the roll shaft, and these are interconnected by a chain. One of the motors 1b is driven by a motor IG with a reduction gear.

The chamfering mechanism B is provided approximately at the center of the roller conveyor 1, and includes a gate-shaped frame 8 provided so as to straddle the roller conveyor 1. The gate-shaped frame 8 is provided with tool elevating means 2 for elevating and lowering a pair of tools 5, 5 for chamfering holes in a perforated plate on the roller conveyor 1 from above and below, respectively.

Here, the tool 5 is a chamfering drill 5 at the tip of the air drill 5a.
b is attached. The tool elevating means consists of an upper elevating means 2a and a lower elevating means 2b, each of which has a support base 2.
A tool elevating cylinder 2d is fixed to C, and the tool 5 is attached to the piston rod of the cylinder.

The tool elevating means 2 is moved laterally by a lateral moving means 7 in a direction perpendicular to the conveyor transport direction. The lateral movement means 7 is horizontally suspended between the column parts 8a and 88 on both sides of the frame 8,
It includes a ball screw 7a and a slide shaft 7b that support the support stand 2C, and the tool elevating means 2 is laterally moved by rotation of the ball screw 7a.

The ball screws 7a, 7a have a chain sprocket attached to one end, and are connected to each other by a chain 7d.
It is designed to rotate in sync. The ball screw 7a is driven by a motor 7m with a reduction gear. Upper ball screw 7
A rotary encoder 7e for detecting the rotational speed is provided at the Q end.

A sensor 3 is attached to the tool elevating means 2 to detect the position of the hole in the perforated plate. The sensor 3 is attached to the lower lifting means 2b, and includes a light source 3b including a light bulb and the upper lifting means 2.
a light receiving end 3 that is attached to a and detects light from the light source 3b;
It consists of a. As shown in FIGS. 2 and 3, the light receiving end 3a has a light receiving element 3 such as a phototransistor inside the box 3G.
The box body 3C has a bottom plate 3d having horizontal slits 3f that are open in a direction perpendicular to the conveyor transport direction and vertical slits 3g that are open along the transport direction.
When the light passes through the slit 31.3Q, the light hits the light receiving element 3e. The light-receiving elements that receive the light passing through the horizontal slit 3f and the vertical slit 3g form separate ports and output different output signals. Also, each circuit has a light receiving element 3e.
are connected in parallel, so that no matter which light receiving element 3e is hit by light, it will output.

Upper surface holding means 9 and side holding means 10 are provided for fixing the perforated plate conveyed to the chamfering mechanism. The upper surface pressing means 9 is provided on the upper tool elevating means 2a, and consists of an air cylinder 9a and a pressing tool 9b attached to the tip of the piston rod.
Press to secure. The side pressure means 10 includes a pressure metal fitting 10a provided below the conveyor roller and slidably fitted onto two slide shafts 10b and 10b provided parallel to the roller, and a pressure metal fitting 10a provided on the side of the conveyor frame 1a. The upper end of the presser metal fitting 10a is brought into contact with the side surface of the perforated plate, and the perforated plate is attached to the conveyor frame on the opposite side of the air cylinder 10c. It is fixed by pressing it against side rollers 11 arranged in a row on 1a with their axes perpendicular. In this example, the side pressing means 10 has three
A set is provided.

The perforated plate that has been chamfered is sent to a finished product discharge mechanism C provided at the end of the roller conveyor 1.

As shown in FIG. 10, a spring-type stopper 1C is provided at the end of the conveyor.

The finished product discharge mechanism C includes a pusher 31 that pushes out the perforated plates on the roller conveyor 1 laterally, and an elevating table 32 that stacks and supports the perforated plates pushed out laterally.

The bushing 31 is provided with a rectangular framework 31a provided on a roller conveyor, a plurality of slide shirts 1 to 31c provided laterally parallel to the framework, and slidably fitted onto the shaft. Extrusion bar 31b and framework 31
The push bar 31b consists of an air cylinder 31d that is attached to the side surface of A, connects a piston rod to the push bar 31b, and moves the push bar 31b laterally.
is brought into contact with the side surface of the perforated plate to push the perforated plate onto the lifting table 32. Elevating table 32
consists of a hydraulic jack 32a forming a leg and a table surface 32b provided thereon.

Next, a method of operating the chamfering device will be explained.

(1) Storage section 20a and delivery section 20 of temporary storage stand 20
Set the perforated plate on b.

(2) The computer operates and the dialogue pair flashes, so
Press the confirmation button.

(3) Perform a reset to return the tool elevating means 2 of the chamfering mechanism B to its origin.

(4) The board delivery chain 24 of the board delivery mechanism A is operated to deliver one perforated board onto the roller conveyor 1.

(5) After completing sending the perforated plate onto the conveyor 1,
The claw 24a of the chain 24 hits the limit switch 26, and the chain 24 stops due to the signal. When the light source 3b of the sensor 3 is turned on and light reception is confirmed at the light receiving end 3a, the roller conveyor 1 moves and conveys the perforated plate to the chamfering mechanism B. The horizontal slit 3 of the light receiving end 3a is formed by the tip of the perforated plate.
When light reception to f is interrupted, the conveyor 1 is stopped in response to the signal. In response to this signal, the air cylinder 10c of the side pressing means 10 is operated to press the perforated plate toward the origin (the left end of the first drawing mechanism B) to correct the position. After a certain period of time, the air cylinder 10c is retracted.

(6) The conveyor 1 moves again, and when the holes on the origin side of the first row of the perforated plate pass under the horizontal slit 3f as shown in FIG. 11, the light to the slit 3f changes from the blocking state to the passing state. Since it becomes blocked again, passage through the hole is detected, and
Conveyor 1 is stopped when the passage is completed. At this time, the center position of the eye hole is on the horizontal extension of the axis of the chamfering tool 5. The side pressing means 10 is operated again to hold the perforated plate from the side.

(7) Next, the tool lifting means 2 is moved laterally while detecting the light passing through the vertical slit 3g.

The passage of the vertical slit 3g over the navigation hole is detected when the light shining through the slit 3g changes from the blocking state to the passing state and then to the blocking state again (FIG. 12). When the tool 5 passes through the eye hole and further moves laterally a certain distance, the center line of the hole coincides with the axis of the tool 5, so the lateral movement of the lifting means 2 is stopped there. In addition, the above fixed distance is the ball screw 7.
It is detected by a rotary encoder 7e provided at the end of a.

(8) Activate the upper surface pressing means 9 to press the perforated plate from the upper surface as well.

(9) Ventilate the air drill 5a, rotate the chamfering drill 5b, operate the tool lifting cylinder 2d, and
Chamfering is performed by bringing b into contact with the hole.

After chamfering is completed, the lifting cylinder 2d is retracted and rotation is stopped. Chamfering is performed first on the top surface, then on the bottom surface. After chamfering is completed, the upper surface pressing means 9 is retracted.

(10) When the chamfering is completed, check whether light is passing through the horizontal slit 3f (Fig. 13).

(11) If no light is detected in the above (10), the holes are lined up in a straight line in the horizontal direction, so move the tool lifting means 2 laterally again and follow the steps (7) to (9) above in the same line. Chamfer the upper hole. When the tool is further moved laterally after the chamfering of the last hole is completed, the side presser metal fitting 10a hits the limit switch 40 attached to the lower tool lifting means 2a, and upon receiving this signal, the tool lifting means 2 is reset to return to its origin. Ru. Then, chamfering is performed in the same manner for the second row.

(12) When the light is detected in (10) above, they are not lined up in the horizontal direction, but lined up diagonally backward in the transport direction of the conveyor 1, so the holes pass through the conveyor 1 until the holes pass through the horizontal slit 3f. move.

Chamfering is performed according to steps (7) to (9). Conveyor 1 below
The holes in that row are sequentially drilled in the order of conveyance and lateral movement of the elevating means 2. Chamfering is performed in the same manner for the second row.

(13) During the chamfering operation, the limit switch 12 attached to the frame 8 of the chamfering mechanism B is in contact with the top surface of the perforating plate, but after chamfering of all holes is completed, the perforating plate leaves the chamfering mechanism B. and the limit switch 12 is O.
Since it becomes FF, completion of chamfering is detected.

(14) The perforated plate that has been chamfered is conveyed to roller conveyor 1.
It is fed to the terminal end of , and stops when it hits a spring-type stopper 1C. At that time, hit the limit switch 33. Upon receiving the signal from the limit switch 33, the conveyor 1
At the same time, the pusher 31 of the finished product delivery mechanism C is activated to push the perforated plate onto the lifting table 32.

(15) When the pushing bar 31b of the button 31 hits the limit switch 34, the button 31 retracts.

When the perforating plate is pushed out onto the lifting table 32, it hits the limit switch 35. If the limit switch 34 is hit in this state, the lifting table 32 begins to descend and continues to descend until the limit switch 35 turns OFF. Ru.

(16) Next, the limit switch 27 of the plate feeding mechanism A
If it is ON, there is a plate in the feeding section 20b, so repeat steps (4) to (15) above.
If the limit switch 27 is OFF, the sending unit 20
Since there is no board in section b, the collapsible stopper 23 is activated to allow the boards stacked in storage 20a to slide down to delivery section 20b.

FIGS. 14 to 17 show the above procedure as a process flowchart.

Figure 14 is a process flow chart of the entire device, Figure 15
The figure shows the device reset subroutine, FIG. 16 shows the chamfering work subroutine, and FIG. 17 shows the traverse processing subroutine.

<Effects of the Invention> As described above, the perforated plate chamfering device of the present invention has the following effects.

(1) Since the positions of the many holes in the perforated plate are detected using an optical sensor and the tool is moved to the position to perform chamfering, the chamfering work can be performed automatically and efficiently.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the chamfering mechanism B, Fig. 2 is a front view of the sensor receiving tip, Fig. 3 is a bottom view of the sensor receiving tip, Fig. 4 is an overall perspective view, and Fig. 5 is a perspective view of the plate feeding mechanism A. , Fig. 6 is a side view of the plate delivery mechanism A, Fig. 7 is a perspective view of the roller conveyor 1, Fig. 8 is a perspective view of the finished product ejection mechanism C, Fig. 9 is a sectional view of the finished product ejection mechanism C, and Fig. 10 is a sectional view of the finished product ejection mechanism C. A side view of the terminal end of the roller conveyor 1, FIGS. 11 to 13 are correlation diagrams between hole positions and sensor light receiving end positions, FIG. 14 is a process flow chart of the entire device, FIG. 15 is a device reset subroutine, and FIG.
The figure shows the chamfering work subroutine, and FIG. 17 shows the traverse processing subroutine. A...Plate sending mechanism B...Chamfering mechanism C...Finished product discharge mechanism 1...Roller conveyor 2...Tool elevating means 3 ...Sensor 5...Tourer...Lateral movement means Fig. 16

Claims (1)

[Claims] A roller conveyor that conveys the perforated plate, a pair of tool elevating means that respectively raises and lowers a pair of tools that chamfer the holes of the perforated plate from above and below on the roller conveyor, and each elevating means moves in the conveying direction of the conveyor. A lateral movement means moves perpendicularly to the perforated plate, and detects when a desired hole in the perforated plate has reached a desired position corresponding to the tool on the conveyor, and moves the tool to the desired hole by the operation of the lateral movement means. a sensor that detects when the conveyor has reached a corresponding position, and the sensor includes a light source attached to the one lifting means and a light receiving end attached to the other lifting means, and the light receiving end is connected to the conveyor. There are horizontal slits that are open perpendicular to the conveyance direction and allow light to pass through when the required holes in the perforated plate pass between the sensors while the perforated plate is being conveyed by the conveyor, and horizontal slits that are open in the direction perpendicular to the conveyance direction. It has vertical slits that are open along the sides and through which light passes when the sensor passes through the required holes by the horizontal movement means, and has light receiving elements arranged inside corresponding to the horizontal slits and the vertical slits. A device for chamfering a perforated plate, which is characterized by: