JP7079142B2 - Position detection device and processing device - Google Patents

Description

The present invention relates to a position detection device and a processing device.

A processing device for processing a member to be processed that has been conveyed on a production line by a perforated portion is known. The processing device has a positioning device that controls a position where the member to be machined stops on the conveyor (see, for example, Patent Document 1). The positioning device is provided with a stopper that is movably attached in the transport direction of the conveyor and comes into contact with the plate material being transported to stop the work. The conveyed plate material abuts on the stopper, and the stopper opposes the inertial force of the member to be machined to stop the member to be machined at an optimum position.

Japanese Unexamined Patent Publication No. 06-305557

By the way, in a positioning device as in Patent Document 1, when the conveyed member to be machined comes into contact with the stopper, the member to be machined may be pushed back by the stopper and pushed back in a direction away from the stopper. If the member to be machined is machined at the position pushed back from the stopper, the quality of the product will vary.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a position detection device and a processing device that reliably detect a conveyed member to be processed at a processing position.

In order to solve the above problems, the position detection device according to the present invention includes a moving body that comes into contact with the workpiece in front of the target position of the conveyed member and moves to the target position. It is characterized by including a stopper that restricts the movement of the moving body in contact with the moving body at a target position, and a sensor that detects whether or not the moving body is restricted from moving by the stopper.

Further, the moving body has a rotating member having a rotating shaft, a contact portion with which the workpiece is in contact, and a detected portion that moves to the detection range of the sensor at the target position. The rotating shaft is provided at a position different from the center of gravity of the rotating member, and the contact portion is located at least partly in the transport path of the machined member before the contact of the machined member. The detected portion is preferably located outside the detection range.

Further, it is preferable that the rotating shaft is located on the side of the contact portion with respect to the center of gravity of the rotating member.

Further, it is preferable that the center of gravity of the rotating member is located on the side of the contact portion with respect to the rotating shaft.

Further, it is preferable that the sensor detects that the moving body is in the target position when the moving body is within the detection range of the sensor for a predetermined time.

Further, it is preferable that the moving body can move forward and backward with respect to the transport path of the member to be processed.

Further, in order to solve the above problems, the processing apparatus according to the present invention includes a moving body that comes into contact with the workpiece in front of the target position of the conveyed member and moves to the target position. A position detection unit having a stopper that regulates the movement of the moving body in contact with the moving body at the target position, and a sensor that detects whether or not the moving body is restricted from moving by the stopper, and the subject. It is characterized by including a holding portion for holding the machined member at the target position and a machined portion for processing the machined member held by the holding portion.

Further, the holding unit and the control unit for controlling the drive of the processing unit are provided, and the control unit holds the moving body when the sensor detects that the moving body is within the detection range of the sensor for a predetermined time. It is preferable to drive the portion and the processed portion.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to reliably detect a conveyed member to be machined at a machined position so that the member to be machined is machined at the machined position, and to provide a product of stable quality.

It is a schematic plan view of the processing apparatus which processes a member to be processed. It is a block diagram for demonstrating the structure of the processing apparatus which processes a member to be processed. It is a schematic side view of the processing apparatus which processes a member to be processed. It is a schematic diagram for demonstrating the process of drilling a column. It is a schematic diagram for demonstrating the process of drilling a column. It is a schematic diagram for demonstrating the process of drilling a column. It is a schematic diagram for demonstrating the process of drilling a column. It is a schematic side view of the position detection apparatus which concerns on a modification.

A preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment shown below is an example, and various forms can be taken within the scope of the present invention.
FIG. 1 is a schematic plan view of a processing device for processing a hole in a support column. FIG. 2 is a block diagram for explaining the configuration of a processing device for processing holes in columns. FIG. 3 is a schematic side view of a processing device for processing holes in columns. FIG. 4 is a diagram showing a state in which the support column is positioned at the machining position. FIG. 5A is a side view showing a state in which the support column is held in the machining position, and FIG. 5B is a front view showing a state in which the support column is held in the machining position. FIG. 6A is a side view showing a state in which the support column is drilled at the machining position, and FIG. 6B is a front view showing a state in which the support column is punched in the machining position. FIG. 7 is a side view showing a state in which the drilled columns are conveyed.

<Structure of processing equipment>
The processing device 1 is a device for processing a hole for attaching a beam to a support (member to be processed) P such as a steel pipe to which a beam is attached in a guard fence. As shown in FIGS. 1 to 7, the processing apparatus 1 includes a position detection device (position detection unit) 2 for detecting whether or not there is a support column P at a processing position (target position) Tp, and a support column P at the processing position. It includes a clamp device (holding unit) 3 for holding, a drilling device (machining unit) 4 for processing a hole in the support column P, and a control device (control unit) 5.

(Position detector)
The position detection device 2 determines whether or not the unprocessed (before drilling) column P conveyed from the upstream side of the processing device 1 is positioned at the processing position Tp for processing a hole in the column P. To detect. The position detecting device 2 is provided above the transport path of the support column P, and can move up and down freely. Here, the "transport path" is a path through which the outer diameter portion (outer peripheral surface) of the support column P passes. That is, the term "inside the transport path" means the inside of the outer diameter of the support column P, and is the position where the position detection device 2 interferes (contacts) with the support column P to be transported. In addition, "outside the transport path" is a position where the position detection device 2 does not interfere (contact) with the support column P to be transported.
The position detecting device 2 has a rotating member (moving body) 21 that receives the conveyed support column P, a stopper 26 that regulates the rotation of the rotating member 21, and a stopper 26 that rotates the rotating member 21. It has a sensor 27 that detects whether or not it is in a regulated machining position.

The rotating member 21 has a main body 22 and a rotating shaft 25 that rotatably supports the main body 22. The main body 22 has a predetermined thickness along the lateral direction with respect to the transport direction T. The main body 22 has a detected portion 23 detected by the sensor 27, and a contact portion 24 that comes into contact with the tip end of the conveyed support column P in the conveying direction T.
The detected portion 23 is a portion having a substantially square shape in a side view. The detected portion 23 has a detected surface 23a facing the sensor 27 in a state where the rotating member 21 is rotated to the processing position Tp on the upper surface in the vertical direction of the processing device 1. The detected portion 23 extends perpendicularly to the detected surface 23a, faces the upstream side in the transport direction T, and has a contact surface 23b that contacts the stopper 26.
The contact portion 24 is integrally connected to one of the four corners of the detected portion 23 and extends upstream in the transport direction T. The contact portion 24 comes into contact with the support column P at the end opposite to the detected portion 23. The end portion of the contact portion 24 with which the support column P contacts has a tip portion 24c formed by the long side portion 24a and the short side portion 24b. Since the contact portion 24 comes into contact with the support column P at the long side portion 24a, the long side portion 24a has a contact surface (hereinafter, also referred to as “contact surface 24a”).

The rotating shaft 25 rotatably supports the main body 22 at the contact portion 24. The rotating shaft 25 is provided at a position that does not match the center of gravity G of the main body 22 of the rotating member 21. Specifically, the axis of the rotating shaft 25 is located on the side of the tip portion 24c with respect to the position of the center of gravity G of the main body 22. As a result, in the rotating member 21, the detected portion 23 rotates (tilts) downward about the rotation shaft 25 in a state where the support column P is not in contact (non-contact state).
That is, in the non-contact state, the rotating member 21 is in a state in which the detected portion 23 rotates downward and the contact portion 24 rotates upward. In the non-contact state, the tip portion 24c of the contact portion 24 is at the contact position Cp located upstream of the machining position Tp in the transport direction T.

The stopper 26 limits the rotation (movement) of the detected portion 23 in the direction opposite to the transport direction T (upstream side) when the support column P comes into contact with the contact surface 24a of the contact portion 24. In a state where the rotating member 21 comes into contact with the stopper 26 at the detected portion 23 and cannot be further rotated, the position where the support column P is located is the processing position Tp of the support column P (see FIG. 4).
The stopper 26 is provided at a position substantially the same height as the detected portion 23 of the rotating member 21, and is provided on the upstream side of the detected portion 23 so as to face the detected portion 23 in the transport direction T. ing.
The stopper 26 has an upstream surface 26a facing the upstream side and a downstream surface 26b facing the downstream side in the transport direction T, and the contact surface 23b of the detected portion 23 of the rotating member 21 comes into contact with the downstream surface 26b.

The sensor 27 is provided on the downstream side of the stopper 26 in the transport direction T and at an upper position facing the downstream end of the detected portion 23 in a state where the rotating member 21 is in contact with the stopper 26. The sensor 27 is, for example, a proximity sensor, and detects whether or not the rotation member 21 is in a state where its rotation is restricted by the stopper 26.
When the rotation of the rotating member 21 is restricted, the sensor 27 is arranged to face the detected portion 23 at a position where the detected portion 23 falls within the detection range of the sensor 27. The detected portion 23 of the rotating member 21 enters the detection range of the sensor 27 only when its rotation is stopped by the stopper 26. When the support column P reaches the machining position Tp, the sensor 27 transmits a predetermined signal (detection signal) to the control device 5 that controls the drive of the clamp device 3 and the drilling device 4.
The rotating member 21, the stopper 26, and the sensor 27 are housed in a housing (indicated by a broken line) B.

(Clamp device)
The clamp device 3 presses (holds) the support column P that has reached the processing position Tp during the drilling process of the support column P at the processing position Tp. The clamp device 3 is provided on the upstream side of the position detection device 2 in the transport direction T. The clamp device 3 has a clamp body 31 that is supported so as to be movable in the height direction. The clamp body 31 is movably supported on both sides in the transport direction T, for example, hydraulically or pneumatically in the height direction.

(Punching device)
The drilling device 4 drills a hole in the support column P at the machining position Tp. The drilling device 4 has, for example, a drilling tool 41 such as a drill. The drilling tool 41 approaches the support column P at the processing position Tp from the side in the transport path and processes the hole H in the support column P.

(Control device)
The control device 5 receives the detection signal from the sensor 27 of the position detection device 2 and controls the drive of the clamp device 3 and the drilling device 4. The control device 5 is communicably connected to the position detection device 2, the clamp device 3, and the drilling device 4, respectively.

<Hole processing process>
Next, the process of processing the hole H in the support column P will be described.
Before the support column P before drilling is transported, as shown in FIG. 3, the position detection device 2 is moved so that the contact surface 24a of the contact portion 24 of the rotating member 21 has entered the transport path. Let me.

First, as shown in FIG. 4, the support column P comes into contact with the contact surface 24a of the contact portion 24 of the rotating member 21 before the processing position Tp. Due to the inertial force of the conveyed support column P, the support column P pushes the rotating member 21 to the processing position Tp along the transfer direction T. As a result, the detected portion 23 of the rotating member 21 rotates in the direction opposite to the transport direction T, and the contact surface 23b of the detected portion 23 comes into contact with the downstream surface 26b of the stopper 26. In this state, the detected portion 23 (detected surface 23a) that was outside the detection range of the sensor 27 enters the detection range.

In the sensor 27, after the contact surface 23b of the detected portion 23 comes into contact with the downstream surface 26b of the stopper 26, in other words, after the detected surface 23a of the detected portion 23 enters the detection range of the sensor 27, a predetermined time is reached. Then, the detection signal is transmitted to the control device 5. That is, the sensor 27 transmits a detection signal to the control device 5 when the detected surface 23a is detected for a predetermined time.
Upon receiving the detection signal, the control device 5 transmits a signal for holding the support column P to the clamp device 3. Upon receiving the signal, the clamp device 3 moves the clamp body 31 toward the support column P as shown in FIG. When the clamp body 31 comes into contact with the support column P and presses the support column P, the clamp device 3 transmits a clamp signal to the effect that the pressing of the support column P is completed to the control device 5.

When the control device 5 receives the clamp signal from the clamp device 3, the control device 5 transmits a signal to the drilling device 4 to start drilling a hole. The drilling device 4 receives the signal from the control device 5 and, as shown in FIG. 6, approaches the drilling tool 41 from the side to the column P to machine the hole H in the column P. After processing the hole H, the drilling device 4 separates the drilling tool 41 from the support column P and returns it to the retracted position. When the drilling tool 41 returns to the retracted position, the drilling device 4 transmits a drilling signal indicating that the drilling of the hole H is completed to the control device 5.

When the control device 5 receives the drilling signal from the drilling device 4, the control device 5 transmits a signal to the position detecting device 2 and the clamping device 3 so as to retract out of the transport path of the support column P. As shown in FIG. 7, when the position detection device 2 retracts out of the transport path, the contact between the contact portion 24 of the rotating member 21 and the support column P is released, whereby the support column P in which the hole H is machined is released. It is transported to the next process in the transport direction T.
When the contact between the rotating member 21 and the support column P is released, the detected portion 23 of the rotating member 21 rotates downward and the contact portion 24 rotates upward, and the contact portion 24 again. The tip portion 24c comes to the contact position Cp.

Since the processing device 1 is provided with the position detecting device 2 as described above, the hole H is machined in the support column P only when the support column P is at the processing position Tp. As a result, the hole H is always machined into the support column P at the same height position on the support column P, so that the support column P with stable quality can be manufactured. Further, the rotating member 21 of the position detecting device 2 comes into contact with the conveyed support column P before the machining position Tp (contact position Cp), and rotates in the transfer direction T due to the inertial force of the support column P. Absorbs the impact caused by the contact of the support column P. Thus, it is effectively prevented that the conveyed support column P is pushed back in the direction opposite to the transfer direction T.

Further, the position detecting device 2 has a stopper 26 which prevents the support column P from moving beyond the machining position Tp by stopping the rotation of the rotating member 21 when the detected portion 23 of the rotating member 21 comes into contact with the detected portion 23. Therefore, the support column P is provided so that the contact portion 24 of the rotating member 21 that receives the support column P does not rotate beyond the processing position Tp (the support column P moves beyond the processing position Tp). It is securely stopped at the processing position Tp. Then, since the sensor 27 detects whether or not the rotation of the rotating member 21 is restricted by the stopper 26, the hole H is machined in the column P after confirming that the column P is present at the processing position Tp. be able to.

Further, the rotation shaft 25 of the rotation member 21 is located on the tip portion 24c side of the contact portion 24 from the position of the center of gravity G of the main body 22 of the rotation member 21. If the support column P is separated from the contact portion 24 of the rotating member 21 in the direction opposite to the transport direction T, the rotating member 21 rotates and the detected portion 23 is out of the detection range of the sensor 27. Move in (away direction). Since the sensor 27 does not detect the detected portion 23 outside the detection range, the detection signal is not transmitted from the sensor 27 to the control device 5. That is, the processing of the hole H in the support column P is not performed.

Further, only when the sensor 27 continuously detects that the detected portion 23 is within the detection range for a predetermined time, the sensor 27 transmits the detection signal to the control device 5, so that the detected portion 23 is assumed to be. The sensor 27 does not transmit the detection signal to the control device 5 when the detection range is entered but the detection range is exited before the predetermined time elapses, that is, when the support column P is separated from the machining position Tp.
As described above, only when the contact portion 24 of the rotating member 21 is in continuous contact with the support column P at the machining position Tp, the sensor 27 transmits the detection signal to the control device 5, so that the hole H is provided in the support column. It can always be processed at a desired position with respect to P.

Further, since the position detecting device 2 can move forward and backward with respect to the transport path of the support column P, the position detection device 2 retracts from the transfer path of the support column P after the hole H of the support column P is machined. The contact state between the contact portion 24 and the support column P is eliminated. As a result, the support column P is transported to the next process.

<Others>
The present invention is not limited to the above embodiment, and can be appropriately modified without exceeding the scope of the present invention. For example, the rotating member 21 is a rotating shaft located so that the detected portion 23 detected by the sensor 27, the contact portion 24 in contact with the support column P, and the center of gravity G of the main body 22 are displaced toward the contact portion 24. With 25, the overall shape and configuration is not limited to the embodiments described above.

Further, in the above embodiment, the rotating member 21 is rotatably supported by the rotating shaft 25, but the rotating member 21 may be rotatably supported, for example, rotating. The moving member 21 may be rotatably supported by sandwiching the moving member 21 from the side at a position where the rotating shaft 25 is provided.

Further, although the sensor 27 was a non-contact type sensor in the above embodiment, it may be a contact type sensor. In the case of the contact type sensor 27, the sensor 27 is provided on the downstream surface 26b of the stopper 26, and when the contact surface 23b of the detected portion 23 is in contact with the sensor 27 for a predetermined time, the detection signal is sent to the control device 5. You may send it.

In the above embodiment, the position detection device 2 is provided above the transport path of the support column P, but may be provided below the transport path. Further, in the above embodiment, the rotation shaft 25 is provided on the side of the contact portion 24 with respect to the position of the center of gravity G. However, the rotating shaft 25 is provided at a position where the rotating member 21 rotates on the opposite side (upstream side) of the transport direction T in a non-contact state between the rotating member 21 and the support column P. The installation position of the rotating member 21 is not particularly limited.
For example, the position detecting device 2A according to the modified example will be described with reference to FIG.

FIG. 8 is a schematic side view of the processing device according to the modified example, and FIG. 8 (a) is a schematic side view of the position detecting device according to the modified example before contacting with the support column P. FIG. 8B is a diagram showing a state in which the support column is positioned at the machining position by the position detection device according to the modified example.
In the following, a configuration different from the position detection device 2 according to the above embodiment will be mainly described, and the same configuration will be designated by the same reference numerals and description thereof will be omitted.

The position detecting device 2A is provided below the transport path and freely advancing and retreating with respect to the transport path. The rotating shaft 25 rotatably supports the main body 22. The rotating shaft 25 is provided at a position that does not coincide with the center of gravity G of the main body 22 of the rotating member 21, and specifically, the axis is on the side opposite to the contact portion 24 with respect to the position of the center of gravity G of the main body 22. positioned. In other words, in the position detecting device 2A, the center of gravity G of the main body 22 is located on the side of the contact portion 24 with respect to the rotating shaft 25.
As a result, the rotating member 21 rotates (tilts) about the rotation shaft 25 on the opposite side of the transport direction T, that is, toward the upstream side in a state where the support column P is not in contact with the support. It has become.

Further, the sensor 27 is provided at a position downstream of the stopper 26 in the transport direction T and facing the downstream end of the detected portion 23 in a state where the rotating member 21 is in contact with the stopper 26. There is.

Even the processing device 1 provided with the position detection device 2A as described above can exhibit the same effects as those of the above-described embodiment.

1 Processing device 2 Position detection device (position detection unit)
21 Rotating member (moving body)
23 Detected part 24 Contact part 25 Rotating shaft 26 Stopper 27 Sensor 3 Clamping device (holding part)
4 Drilling device (processed part)
5 Control device P strut (working member)
Tp processing position (target position)
Cp contact position

Claims (7)

A moving body that comes into contact with the workpiece in front of the target position of the conveyed member and moves to the target position.
A stopper that restricts the movement of the moving body in contact with the moving body at the target position,
A sensor that detects whether or not the moving body is restricted from moving by the stopper, and
Equipped with
The moving body has a rotating member having a rotating shaft, a contact portion with which the workpiece is in contact, and a detected portion that moves to the detection range of the sensor at the target position.
The rotating shaft is provided at a position different from the center of gravity of the rotating member.
The contact portion is located at least partly in the transport path of the workpiece before the contact of the workpiece, and the detection portion is located outside the detection range.
A position detection device characterized by the fact that. The position detecting device according to claim 1 , wherein the rotating shaft is located on the side of the contact portion with respect to the center of gravity of the rotating member. The position detecting device according to claim 1 , wherein the rotating shaft is located on the side opposite to the contact portion with respect to the center of gravity of the rotating member. The one according to any one of claims 1 to 3 , wherein the sensor detects that the moving body is in the target position when the moving body is within the detection range of the sensor for a predetermined time. Position detector. The position detecting device according to any one of claims 1 to 4 , wherein the moving body can move forward and backward with respect to a transport path of the member to be machined. A moving body that comes into contact with the machined member and moves to the target position in front of the target position of the transported member, and a stopper that the moving body comes into contact with the target position and regulates the movement. A position detecting unit having a sensor for detecting whether or not the moving body is restricted from moving by the stopper, and
A holding portion that holds the member to be machined at the target position,
A processing portion for processing the member to be processed held by the holding portion, and a processing portion.
Equipped with
The moving body has a rotating member having a rotating shaft, a contact portion with which the workpiece is in contact, and a detected portion that moves to the detection range of the sensor at the target position.
The rotating shaft is provided at a position different from the center of gravity of the rotating member.
The contact portion is located at least partly in the transport path of the workpiece before the contact of the workpiece, and the detection portion is located outside the detection range.
A processing device characterized by that. A control unit that controls the drive of the holding unit and the processing unit is provided.
The sixth aspect of claim 6 , wherein the control unit drives the holding unit and the processing unit when the sensor detects that the moving body is within the detection range of the sensor for a predetermined time. Processing equipment.

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