JPH0625219U - Work detection device in work transfer device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a work detection device in a work transfer device capable of surely detecting a work without detecting or damaging the work at an irrelevant position. A work transfer device for transferring a work on an upstream conveyor to a predetermined position on a downstream conveyor, and contact detection devices 51 to 55 for detecting the work A at least at a specific position of the downstream conveyor 3. Support member 6 for supporting
Is provided so as to be able to move up and down, and when the supporting member 6 is moved up and down, the contact detection devices 51 to 55 contact a predetermined portion of the work A to detect the work A, and a predetermined position of the work A. And a lower position that avoids contact with the part.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work detection device in a work transfer device that transfers a work on an upstream conveyor to a predetermined position on a downstream conveyor.

[0002]

[Prior art]

 Conventionally, in a work transfer device that transfers a work on the upstream conveyor to a predetermined position on the downstream conveyor, a reflection type photoelectric sensor is used as a detection means for detecting the work. Was detected, and drive control of the upstream side conveyor and the downstream side conveyor was performed based on this detection signal.

[0003]

[Problems to be solved by the device]

 However, in the case of detecting a work by a photoelectric sensor as in the above-mentioned conventional case, the light emitting portion and the light receiving portion of the photoelectric sensor are easily contaminated when the usage environment is bad, and the light amount changes when these light emitting portion and the light receiving portion are contaminated. There was a problem that the detection of the work varied and the work could not be conveyed exactly as requested.

Further, if a mechanical sensor having a contact such as a limit switch is used as the sensor, detection can be surely performed. However, if the limit switch is simply fixed, there is a protrusion in the work. However, there is a problem that the limit switch interferes with the protrusion to detect the work at an irrelevant position or damage the work.

[0005]

[Means for Solving the Problems]

 The work detection device in the work transfer device of the present invention is a work transfer device that includes an upstream conveyor and a downstream conveyor, and transfers the work on the upstream conveyor to a predetermined position on the downstream conveyor, and at least the downstream conveyor. A support member that supports a contact detection device that detects the work is provided at a specific position of the side conveyor so as to be able to move up and down, and the contact detection device makes contact with a predetermined portion of the work by the lifting operation of the support member. The work is configured to have a raised position where the work can be detected and a lower position where the work can be prevented from coming into contact with a predetermined portion of the work.

[0006]

[Action]

 When detecting a work, place the contact detection device in the raised position to reliably detect the work with this contact detection device, and after detecting the work with the contact detection device, move this contact detection device to the lower position. By arranging them, it is possible to avoid interference with the protrusions of the work.

[0007]

【Example】

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

FIG. 1 shows a work transfer device.

In FIG. 1, reference numeral 1 denotes a work transfer device, which is provided with an upstream conveyor 2 and a downstream conveyor 3 and transfers a work A on the upstream conveyor 2 to a downstream conveyor 3 It is to be conveyed to a predetermined position above.

The work A is formed, for example, in a rectangular shape in a side view as in the illustrated example, and a protrusion A1 protruding downward is provided at an appropriate position on the bottom of the rectangular work A. .

The upstream conveyor 2 conveys the work A provided with the protrusion A1, and therefore cannot convey the work A using the entire conveyance surface like a belt conveyor, and therefore the front and rear And a pair of left and right chains 22 wound around the sprockets 21 and 21, and a plurality of slats 23 connected between the left and right chains 22 so as to be orthogonal to the chains 22. A so-called slat conveyor is used. Therefore, the upstream conveyor 2 supports the bottom of the work A at the tops of the plurality of slats 23 while avoiding the projections A1, and rotationally drives the chain 22 by a driving device (not shown) to move the slats 23 to the downstream side. The work A is conveyed to the downstream side conveyor 3 by being circulated and moved toward the conveyor 3.

For the same reason as the upstream side conveyor 2, the downstream side conveyor 3 also has a pair of left and right chains 32 wound around sprockets 31 and 31 arranged in front and rear, and the chain between the left and right chains 32. A so-called slat conveyor is used which is composed of a plurality of slats 33 arranged so as to be orthogonal to 32.

Further, the downstream side conveyor 3 is provided with a deceleration sensor 51, a synchronization sensor 52, a high speed synchronization sensor 53, a loading deceleration sensor 54, and a loading stop sensor 55 in this order from the upstream side to the downstream side.

The deceleration sensor 51 uses a mechanical contact switch, for example, a limit switch, and is provided on the support member 6 as shown in FIG.

The support member 6 has a bottom center portion connected to the rod end 61 a of the telescopic cylinder 61 via a bracket 62, and guide members 65 including a guide rod 63 and a guide cylinder 64 are provided on the left and right sides of the bottom surface. The extension / contraction operation of the extension / contraction cylinder 61 is configured to move up and down while being guided by the guide member 65. The support member 6, the telescopic cylinder 61, and the guide member 65 are fixed to a base member (not shown) of the downstream side conveyor 3 via a mounting member 66.

Therefore, when the support member 6 is moved up and down by the telescopic cylinder 61, the deceleration sensor 51 provided on the support member 6 has a detection end, for example, a predetermined portion of the work A that is carried into the downstream conveyor 3. It has a raised position (see the chain double-dashed line in FIG. 2) that comes into contact with the projection A1 provided at the tip of the work A and a lower position (see the solid line in FIG. 2) that avoids contact with the projection A1 and the like of the work A. be able to.

Further, the synchronous sensor 52, the high-speed synchronous sensor 53, the carry-in deceleration sensor 54, and the carry-in stop sensor 55 also use a mechanical limit switch having a contact like the above-mentioned decelerating sensor 51. It is provided on a support member that can be raised and lowered by a telescopic cylinder, and is configured to take the above-described raised position and lowered position.

Next, drive control of the upstream side conveyor 2 and the downstream side conveyor 3 based on the detection of each of the sensors 51 to 55 will be described.

In a state where the sensors 51 to 55 are in contact with a predetermined portion of the work A and located at a detectable rising position, the upstream conveyor 2 is rotationally driven to move the work A on the upstream conveyor 2. It is conveyed to the downstream side conveyor 3. When the work A is carried into the downstream conveyor 3 during this work conveyance, the deceleration sensor 51 first contacts the work A to detect it, and based on the detection of the deceleration sensor 51, the upstream conveyor 2 Is decelerated and the work A is decelerated and conveyed to the downstream conveyor 3 side.

Next, the synchronous sensor 52 comes into contact with the work A to detect it, and the downstream side conveyor 3 is rotationally driven based on the detection of the synchronous sensor 52. The rotational drive of the downstream side conveyor 3 is controlled so that the slats 33 of the downstream side conveyor 3 do not interfere with the protrusions A1 of the work A, and at the same transportation speed as the upstream side conveyor 2. .

When the downstream conveyor 3 and the upstream conveyor 2 are synchronously driven in this way, and when the front end of the work A is conveyed to near the central portion of the downstream conveyor 3, the high speed synchronous sensor 53 comes into contact with the work A. This is detected, and based on the detection of this high-speed synchronization sensor 53, the downstream side conveyor 3 and the upstream side conveyor 2 are operated at high speed in a synchronized state, and the upstream side conveyor 2 to the downstream side conveyor 3 Increase the transfer speed of work A to.

Then, when the work A is conveyed to the downstream conveyor 3 at a high speed and the work A is completely carried in from the upstream conveyor 2 onto the downstream conveyor 3, the carry-in deceleration sensor 54 comes into contact with the work A. Then, this is detected, and the downstream side conveyor 3 is decelerated based on the detection of the carry-in deceleration sensor 54, and the driving of the upstream side conveyor 2 is stopped.

After that, the carry-in stop sensor 55 comes into contact with the work A and detects it, so that the drive of the downstream conveyor 3 is stopped and the work A is placed on the downstream conveyor 3.

Here, although each of the sensors 51 to 55 is arranged in the raised position when the work A is detected, it is moved to the lower position by the retracting operation of the telescopic cylinder 61 after the contact with the work A is detected. Will be placed. As described above, the sensors 51 to 55 are arranged at the lower positions after the work A is detected. If the sensors 51 to 55 are arranged at the upper position even after the work A is detected, the sensors 51 to 55 are arranged. This will interfere with the projection A1 provided on the rear portion of the work A and cause erroneous detection at an irrelevant position or damage due to interference. Therefore, by arranging the sensors 51 to 55 at the lower position after detecting the work A, the sensors 51 to 55 do not interfere with the projection A1 at the rear of the work A after detecting the work A. There is no risk of accidental detection at unrelated positions or damage due to interference.

In this example, the five sensors 51 to 55 are provided on the downstream side conveyor 3, but, for example, when the upstream side conveyor 2 and the downstream side conveyor 3 do not require synchronous operation. It is sufficient to provide only the carry-in stop sensor 55, and if high-speed synchronous operation is not required, the synchronous sensor 52 and the carry-in stop sensor 55 may be provided, and the sensors 51 to 55 are appropriately provided according to the purpose. Good.

The carry-in deceleration sensor 54 may be provided on the upstream conveyor 2.

Further, by providing the sensors 51 to 55 on the upstream conveyor 2, the work A can be carried into the upstream conveyor 2 and the work A can be carried from the upstream conveyor 2 to the downstream conveyor 3 described above. You can do the same.

[0028]

[Effect of device]

 As described above, according to the present invention, the workpiece is reliably detected by the contact detection device, and the detection device is prevented from moving to the lower position after the detection by the detection device. It does not interfere with the body, etc., and it does not cause problems such as work detection or damage at unrelated positions.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of a work transfer device.

FIG. 2 is a side view showing a contact detection device and a support member.

[Explanation of symbols]

 1 Work Transfer Device 2 Upstream Conveyor 3 Downstream Conveyor 51-55 Sensor (Contact Detection Device) 6 Support Member

Claims (1)

[Scope of utility model registration request] 1. A work transfer device comprising an upstream side conveyor and a downstream side conveyor, which transfers a work on the upstream side conveyor to a predetermined position on the downstream side conveyor, at least at a specific position of the downstream side conveyor. A support member for supporting the contact detection device for detecting the work is provided so as to be able to move up and down, and as the support member is moved up and down, the contact detection device is brought into contact with a predetermined portion of the work to detect the work. A work detection device in a work transfer device, which is configured to have a position and a lower position that avoids contact with a predetermined portion of the work.