JP2020075773A - Work-piece stacking device and work-piece stacking method - Google Patents

Abstract

To provide a work-piece stacking device capable of improving production efficiency by stably performing stacking of work-pieces, and to provide a work-piece stacking method.SOLUTION: A work-piece stacking device capable of stacking work-pieces on an upper surface of a symbol 2 as a work-piece stacking position, comprises: pressing means 1 for pressing work-pieces 10, 11 toward the work-piece stacking position by relatively approaching from above toward the work-piece stacking position; and load measurement means 21 for measuring a load applied to the work-piece stacking position by the pressed work-pieces 10, 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a work stacking device and a work stacking method, and more particularly, to a work stacking device and a work stacking method for stacking works of the same shape.

  In the product manufacturing process, there is a process of stacking works of the same shape at the work stacking positions.

  As such a work stacking device, there is a device as shown in Patent Document 1. In Patent Document 1, there is a take-out plate for taking out a product, which is a work, by vacuum suction on a lower surface from between upper and lower molds of a molding machine, and an accumulation table on which the taken-out products are accumulated. Products are sequentially stacked on the products suction-held on the accumulation table. When the products are sequentially stacked, the transfer of the products from the take-out plate to the collecting table is performed by air blowing from the vacuum drawing hole of the take-out plate.

JP-A-03-120121

  However, when transferring workpieces, the stacking of workpieces may become unstable due to the elasticity of the workpieces causing the postures of the stacked workpieces to tilt and the overlap with the workpieces below not being constant. There is a problem that it ends up.

  The instability of the stacking of works may cause an operation stop due to an abnormality detection or a trouble in the subsequent process, which may lead to a reduction in production efficiency.

  Therefore, an object of the present invention is to provide a work stacking apparatus and a work stacking method capable of improving production efficiency by stably stacking works.

  In order to solve the above problems, the work stacking apparatus according to claim 1 is a work stacking apparatus capable of stacking works at a work stacking position, and the work stacking apparatus relatively approaches the work stacking position from above, And a load measuring means for measuring the load applied to the work stacking position by the pressed work.

  In the work stacking apparatus according to the first aspect, the load applied to the work stacking position by the works pressed by the pressing unit can be measured by the load measuring unit. When the measured load reaches a predetermined load, the pressing means stops approaching. Accordingly, it is possible to appropriately press the work to be stacked on the work stacking position or the works already stacked at the work stacking position. By appropriately pressing the stacked works, the works can be stacked stably.

  The work stacking apparatus according to claim 1 is for stacking the work at the work stacking position such that the posture of the stacked works is inclined due to the load measured by the load measuring means and the overlap with the work below is not constant. Anomalies can be detected.

  In order to accumulate as many works as possible in the work stacking position, which is a limited space, there may be a plurality of rows in which the works overlap at the work stacking position. In this case, the work stacking apparatus according to the first aspect can confirm whether or not the stacking of the works is performed stably in the overlapping rows of the works by the distribution of the load measured by the load measuring means.

  The work stacking position of claim 2 is the work stacking device of claim 1, wherein the work stacking device detects the distance between the work stacking position and the pressing means, or the height of the work stacked at the work stacking position. Work height detection means for detecting

  A work stacking apparatus according to a second aspect of the present invention has the same operation as that of the first aspect, and when the approach of the pressing means is stopped, the distance between the work stacking position detected by the distance detecting means and the pressing means is determined. Can be detected. When the detected distance reaches a predetermined distance, the work stacking operation is temporarily stopped. Thereby, it is possible to prevent the stacked work heights from exceeding the limit at the work stacking position.

  Further, in the work stacking device according to the second aspect, the postures of the stacked works are inclined and the overlap with the work below is not constant due to the load measured by the load measuring unit and the distance detected by the distance detecting unit. It is possible to detect abnormalities in the stacking of works at the work stacking positions such as the above.

  The work stacking apparatus according to the second aspect of the invention has the same function and effect even when the height of the stacked work pieces is detected by the work height detection means instead of the distance detection means.

  A work stacking apparatus according to a third aspect is the work stacking apparatus according to the first or second aspect, wherein the pressing means can hold and convey the work.

  The work stacking apparatus of claim 3 has the same operation as that of claim 1 or 2, and in addition to the pressing means pressing the work toward the work stacking position, the work can be held and conveyed. The number of constituent elements of the device can be reduced.

  In the work stacking apparatus according to the fourth aspect, the pressing means relatively presses the held works toward the works already stacked at the work stacking position, and then releases the holding of the works.

  In the work stacking apparatus of the fourth aspect, the works held by the pressing means are pressed toward the works already stacked at the work stacking position, and then the holding of the works is released. As a result, it is possible to stack the workpieces whose holding has been released and the workpieces below the workpieces so that the overlap therebetween becomes constant. Further, by utilizing the load measured by the load measuring means, every time the work is transferred from the pressing means to the work stacking position, the held work is evenly distributed toward the work stacked at the work stacking position. It can be pressed with various loads. Therefore, it is possible to stably stack the works.

  The work stacking method according to claim 5, wherein the work held above the work stacking position is moved, and the held work is pressed against the work already stacked at the work stacking position, Releasing the holding, and stacking the held works on the works already stacked at the work stacking position.

  In the work stacking method of the fifth aspect, the held works are pressed against the works already stacked at the work stacking position, and then the holding of the works is released. As a result, it is possible to stack the workpieces whose holding has been released and the workpieces below the workpieces so that the overlap therebetween becomes constant.

  The work stacking device according to the first to fourth aspects and the work stacking method according to the fifth aspect can improve the production efficiency by stably stacking the works.

It is the schematic of the work stacking apparatus which concerns on this invention.

  Hereinafter, the work stacking apparatus according to the first embodiment of the present invention will be described.

  FIG. 1 shows a work stacking operation. In FIG. 1, the work stacking device includes a vacuum platen 1 and a lifter conveyor 2. The stacked works 10 and 11 have the same shape.

  The vacuum platen 1 serves as a pressing means, as will be described later in a stacking operation.

  The vacuum platen 1 can adsorb and hold the work 10 on its bottom surface.

  The vacuum platen 1 can convey the work 10 above the lifter conveyor 2 while holding the work 10.

  The upper surface of the lifter conveyor 2 is the work stacking position.

  The lifter conveyor 2 can move up and down with respect to the vacuum platen 1.

  The lifter conveyor 2 has a load measuring means 21 for measuring the load applied to the work stacking position by the works 11 pressed toward the work stacking position. The load measuring means 21 can measure the load using, for example, a strain gauge.

  The lifter conveyor 2 also has a distance detecting means 22. The distance detecting means 22 detects the rising distance of the lifter conveyor 2.

  The stacking operation of the work stacking device will be described below.

  As shown in FIG. 1A, the vacuum platen 1 having the work piece 10 adsorbed and held on its bottom surface moves above the lifter conveyor 2. This is a step of moving the works 10 held above the work stacking position.

  Next, as shown in FIG. 1 (b), the lifter conveyor 2 rises toward the vacuum surface plate 1. When viewed relatively from the lifter conveyor 2 side, the vacuum platen 1 approaches from the upper side toward the upper surface of the lifter conveyor 2 which is the work stacking position.

  When the lifter conveyor 2 continues to rise, as shown in FIG. 1C, the work 10 held on the vacuum platen 1 and the work 11 already stacked on the upper surface of the lifter conveyor 2 are vacuumed. It is pressed against the upper surface of the lifter conveyor 2 by the board 1. This is also a step of pressing the held works 10 toward the works 11 already stacked at the work stacking position.

  In the state of FIG. 1C, the load measuring means 21 measures the load applied to the upper surface of the work lifter conveyor 2 by the pressed works 10 and 11. As the lifter conveyor 2 rises, the measured load increases. In other words, the measured load increases as the distance between the upper surface of the lifter conveyor 2 and the vacuum platen 1 decreases.

  When the load measured by the load measuring means 21 reaches a predetermined load, the lifting of the lifter conveyor 2 is stopped. When viewed relatively from the lifter conveyor 2 side, the approach of the vacuum platen 1 toward the upper surface of the lifter conveyor 2 stops.

  The vacuum surface plate 1 releases the suction holding of the work 10 on its bottom surface. As a result, the works 10 are stacked on the works 11 already stacked on the upper surface of the lifter conveyor 2. This is a process of releasing the holding and stacking the held works 10 on the works 11 already stacked at the work stacking position.

  Next, as shown in FIG. 1D, the lifter conveyor 2 is lowered to complete the transfer of the works 10 to the work stacking position. The descending distance of the lifter conveyor 2 is such that, in the repetition of the work stacking operation thereafter, the work 10 sucked and held on the bottom surface of the vacuum platen 1 moving above the lifter conveyor 2 has already been stacked at the work stacking position. 11 is set so as not to come into contact with it.

  By repeating the work stacking operation, works can be sequentially stacked on the upper surface of the lifter conveyor 2.

  As shown in FIG. 1A, when the lifter conveyor 2 is at the lowest position, in other words, when the lift distance of the lifter conveyor 2 is 0, the lifter conveyor 2 that is the work stacking position The maximum distance between the upper surface and the bottom surface of the vacuum platen 1 which is the pressing means is set in advance.

  In the stacking operation of the work stacking apparatus described above, as shown in FIG. 1C, the load measured by the load measuring unit 21 becomes a predetermined load, and the distance detecting unit 22 lifter is lifted at a position where the lifter conveyor 2 is stopped from rising. The rising distance of the conveyor 2 is detected.

  The distance between the upper surface of the lifter conveyor 2 at the work stacking position and the bottom surface of the vacuum surface plate 1 as the pressing means is obtained by subtracting the lift distance of the lifter conveyor 2 of FIG. 1 (c) from the maximum distance of FIG. 1 (a). Can be calculated.

  The calculated distance between the upper surface of the lifter conveyor 2 and the bottom surface of the vacuum platen 1 is the height of the work stacked on the top surface of the lifter conveyor 2 which is the work stacking position.

  When the height of the work reaches a predetermined height, the work stacking operation is temporarily stopped.

  While the work stacking operation is temporarily stopped, for example, the works 10 and 11 stacked on the upper surface of the lifter conveyor 2 are further transported to the next process.

  In the above embodiment, the vacuum platen 1 which is the pressing means can hold and convey the work, but the present invention is not limited to this. The pressing means may not hold and convey the works and may only have a function of pressing the works toward the work stacking position.

  In the above-described embodiment, the vacuum surface plate 1 serving as the pressing means can hold the work 10 by suction, but the present invention is not limited to this. The pressing means may hold the work by a method other than suction, such as gripping or pinching.

In the above embodiment, the case where the work stacking position is the upper surface of the lifter conveyor 2 has been described, but the present invention is not limited to this. The work stacking position may be provided on an element other than the lifter conveyor, such as a table, as long as the work stacking surface is provided.

  The above embodiment has described the case where the lifter conveyor 2 whose upper surface is at the work stacking position can be raised and lowered with respect to the vacuum surface plate 1 which is the pressing means, but the present invention is not limited to this. There is no. The pressing means may be capable of descending and ascending to the work stacking position.

  In the above embodiment, the lifter conveyor 2 whose upper surface is at the work stacking position also has the distance detecting means 22 for detecting the distance between the work stacking position and the vacuum surface plate 1 which is the pressing means. It is not limited to. The distance detecting means may be provided in the pressing means or other elements.

  Although the above-mentioned embodiment explained the case where distance detection means 22 detects the rising distance of lifter conveyer 2, it is not limited to this. The distance detecting means may detect the distance between the work stacking position and the pressing means directly or indirectly by a position sensor or the like.

  Although the above embodiment has described the case where the lifter conveyor 2 also has the distance detecting means 22, the present invention is not limited to this. The work stacking device may have a work height detecting means for detecting the height of the work stacked at the work stacking position by using a sensor such as a photoelectric tube or the like, instead of the distance detecting means.

1 Vacuum Surface Plate 2 Lifter Conveyor 10, 11 Work 21 Load Measuring Means 22 Distance Detecting Means

Claims (5)

A work stacking device capable of stacking works at a work stacking position,
A pressing means that relatively approaches the work stacking position from above and presses the works toward the work stacking position,
A work stacking device, comprising: load measuring means for measuring a load applied to the work stacking position by the pressed work.   3. A distance detecting means for detecting a distance between the work stacking position and the pressing means, or a work height detecting means for detecting a height of the works stacked at the work stacking position. Work stacking device described in.   The work stacking device according to claim 1 or 2, wherein the pressing means can hold and convey works.   The pressing means relatively presses the held works toward the works already stacked at the work stacking position, and then releases the holding of the works. Work stacking device. A step of moving the works held above the work stacking position,
The process of pressing the held work toward the work already stacked at the work stacking position,
A work stacking method comprising a step of releasing the holding and stacking the held works on the works already stacked at the work stacking position.

Images