JP6189979B2 - Circulating transfer device - Google Patents

Description

  The present invention relates to a circulation type conveyance device, and more particularly, to a circulation type conveyance device in which a conveyance object removed from the alignment path is returned to the upstream side and supplied to the alignment path again while the conveyance objects are aligned on the alignment path. It relates to the structure of the carrier.

  In general, there is a transport apparatus configured to transport a transported object in an aligned state in a desired posture by controlling the posture of the transported object in the middle of transport. As this type of conveyance device, for example, a vibration type conveyance device called a parts feeder or a linear feeder is known. In such a transport device, while transporting the transported object on the alignment path, the posture is changed such as sorting or reversing by shaking off the transport body that is not in the desired posture or blowing it away with an air current. In other words, all the conveyed items supplied to the exit of the alignment path are aligned in a desired posture.

  In the alignment process of the transported object, the transported object in an inappropriate posture is excluded from the alignment path, so that the recovery side transport for collecting the transported object, returning it to the upstream side, and supplying it to the alignment path again. A circulation type conveyance device provided with a body is known (for example, refer to patent documents 1 and 2 below). In this circulation type conveyance device, a supply side conveyance body and a collection side conveyance body are provided in parallel, and the supply side conveyance body is provided with a supply side alignment path for supplying a conveyance object in an aligned state, and this supply A supply-side conveyance path is formed in parallel with the side alignment path, and receives a conveyance object excluded from the supply-side alignment path and conveys the conveyance object to the downstream side of the supply-side alignment path. A collection-side conveyance path is formed for receiving a conveyed product from the downstream end of the sheet and conveying it to the upstream side of the supply-side alignment path. In addition, between the supply-side transport body and the collection-side transport body, a supply-side transport path having a structure in which both transport bodies face each other with gaps and steps that do not hinder the movement of the transported object. A collection transfer unit that transfers the conveyed product to the collection side conveyance path and a supply transfer unit that transfers the conveyance item from the collection side conveyance path to the supply side alignment path and the supply side conveyance path are provided.

JP 2001-063816 A JP 2002-068460 A

  However, rapid miniaturization has progressed in recent electronic components, and at present, cubic electronic components (electrical resistance) of 0604 (0.6 mm × 0.4 mm) or 0402 (0.4 mm × 0.2 mm) size. , Capacitors, inductors, diodes, transistors, etc.) are increasingly being used, but as the next-generation component size, 0201 (0.25 mm x 0.125 mm) size will be considered, and more in the future It is expected that electronic components will be further miniaturized. If the transported material becomes finer in this way, the transported product may become clogged in the transport path due to dust or the like, or may be stuck to the transport surface, or the transport contamination may cause problems due to dirt on the transported material. Is likely to occur. Further, in the above-described collection transfer section and supply transfer section where both transport bodies face each other with a slight gap and a level difference, the transported object may be jammed or clogged with dust, resulting in trouble in the transport operation.

  In addition, along with the miniaturization of electronic components as described above, the line speed of the electronic system production line is increasing. Therefore, the transfer apparatus is also required to increase the transfer speed and increase the density of the transfer mode. At the same time, since the damage due to the line stop time for recovery when electronic components having an inappropriate posture are supplied by mistake is increasing, the required level for the alignment accuracy of the conveyed objects is also increasing.

  Therefore, the present invention solves the above-mentioned problems, and the problem is that it is possible to reduce the conveyance failure and conveyance contamination accompanying the miniaturization of the conveyed product, and also to increase the conveyance speed and the density of the conveyance mode. It is to realize a circulation type conveying apparatus that can contribute.

  In view of such a situation, the circulation type conveying device according to the present invention has a supply-side conveyance body having a supply side alignment path that exhibits a vibration mode for conveying a conveyance object in a predetermined supply direction, and the conveyance object. It exhibits a vibration mode for transporting in the collection direction opposite to the supply direction, accepts the transported object excluded from the supply side alignment path, transports it in the recovery direction, and supplies at least a part of the transported object to the supply A collection-side conveyance body including a collection-side conveyance path that returns to the upstream side of the side alignment path.

  In the present invention, the collection transfer unit that transfers the conveyed product excluded from the supply side alignment path to the collection side conveyance path, and the conveyance item conveyed by the collection side conveyance path is transferred to the supply side alignment path. A supply transfer unit is provided, and in the recovery transfer unit, the downstream end portion of the transported material removal path from the supply side alignment path projects above the upstream part of the recovery side transport path with a gap. Alternatively, in the supply transfer unit, it is preferable that the downstream end portion of the collection side conveyance path projects above the upstream portion of the supply side alignment path with a gap. According to this, in the collection transfer unit or the supply transfer unit, the exclusion path from the supply side alignment path or the downstream end of the collection side conveyance path is located above the upstream part of the collection side conveyance path or the upstream part of the supply side alignment path, respectively. Therefore, even if the transported object is miniaturized, the transported object or dust is trapped in the gap between the supply-side transport body and the recovery-side transport body in the collection transfer section or the supply transfer section. It is possible to prevent the conveyance body from causing interference, the conveyance object from being damaged, and dust from being generated. In this case, in the collection transfer section, the downstream end portion of the exclusion path from the supply side alignment path projects with an interval above the upstream section of the collection side conveyance path, and in the supply transfer section, the collection side conveyance path Of course, it is desirable that the downstream end portion of the first and second end portions protrude above the upstream portion of the supply side alignment path with a gap.

In the present invention, the overhang structure in the recovery transfer section (the structure in which the downstream end portion of the supply-side transport body exclusion path projects above the upstream portion of the collection-side transport path of the recovery-side transport body with an interval above, Similarly, the upstream projecting portion projecting sideways toward the lower side of the portion where the downstream end portion of the exclusion path from the supply side alignment path of the supply side transport body is formed is the recovery side transport body. It is preferable that it is comprised by providing in. Further, a projecting structure in the supply transfer section (a structure in which the downstream end of the collection transport path of the collection side transport body projects with an interval upward from the upstream portion of the supply side alignment path of the supply side transport body, below) The same applies to the case where the upstream side of the supply side alignment path of the supply side transport path is formed on the recovery side transport body. It is preferred that According to this, the protruding structures of the recovery transfer section and the supply transfer section are both upstream and downstream protrusions that protrude laterally toward the upper side or lower side of the supply side transport body in the recovery side transport body. By providing a part, it is possible to preferentially design the conveyance structure of the supply-side conveyance body, so that the conveyance state of the conveyance object on the supply-side alignment path is stabilized and the conveyance performance and alignment performance are improved. Can do. In particular, since it becomes easy to configure the supply-side transport body in a symmetrical shape, the transport speed can be increased while ensuring the stability of the transport mode due to vibration. In addition, the apparatus can be made compact while ensuring the lateral distance between the inner portions of both transport bodies. In particular, in an area between the upstream projecting portion and the downstream projecting portion of the recovery side transport body, the inner side surface of the supply side transport body and the inner side surface of the recovery side transport body are lateral to each other. The upstream projecting portion protrudes toward the supply side transport body beyond the extension range of the gap between the inner side surfaces, while facing the supply side transport body. The downstream end portion does not protrude toward the collection-side conveyance body with respect to the extension range of the gap, and the downstream-side protrusion portion protrudes toward the supply-side conveyance body beyond the extension range of the gap. On the other hand, it is desirable that the upstream portion of the supply-side transport body does not protrude toward the collection-side transport body with respect to the extension range of the gap.

  In the present invention, the supply-side transport body is parallel to the supply-side alignment path, and accepts a transported object removed from the supply-side alignment path and transports it in the supply direction to the upstream side of the recovery-side transport path. It is preferable that a supply-side conveyance path provided with a downstream end portion constituting the recovery transfer section as a downstream end portion of the exclusion path is further provided between the first and second sections. According to this, the conveyed product excluded from the supply-side alignment path is conveyed in the supply direction by the supply-side conveyance path as the exclusion path, and upstream of the collection-side conveyance path via the collection transfer unit at the downstream end thereof. Therefore, even if the collection transfer unit is provided in a limited range, a wide selection area for removing the conveyed product on the supply side alignment path can be secured.

  In this case, it is preferable that the downstream end portion of the supply-side transport path protrudes above the upstream portion of the recovery-side transport path with a gap in the recovery transfer section. Further, the projecting structure is such that the upstream projecting portion projecting sideways toward the lower side of the portion where the downstream end portion of the supply side transport path of the supply side transport body is formed on the recovery side transport body. It is desirable to be configured by being provided.

  In the present invention, as the supply transfer section, a transported object transported by the recovery-side transport path between the downstream end portion of the recovery-side transport path and the upstream portion of the supply-side alignment path is the supply-side alignment. In addition to this, an outer peripheral side supply transfer section for transferring to the path has been provided, and in addition, it has been transported by the recovery side transport path between the downstream end portion of the recovery side transport path and the upstream portion of the supply side transport path. It is preferable that an inner peripheral side supply transfer unit that transfers the conveyed product to the supply side transfer path is provided as a second recovery transfer unit. In the outer periphery side supply transfer unit, it is preferable that the outer periphery side downstream end portion of the recovery side conveyance path projects above the upstream portion of the supply side alignment path with a gap. In this overhang structure, the recovery-side transport body is provided with a downstream outer peripheral protrusion that protrudes sideways toward the upper side of the portion where the upstream portion of the supply-side alignment path of the supply-side transport body is formed. Desirably configured. Further, in the above-described inner periphery side supply transfer section, it is preferable that the inner periphery side downstream end portion of the collection side conveyance path projects with an interval above the upstream portion of the supply side conveyance path. In this overhanging structure, the recovery-side transport body is provided with a downstream inner peripheral protrusion that protrudes sideways toward the upper side of the portion where the upstream portion of the supply-side transport path of the supply-side transport body is formed. It is desirable to be constituted by.

  In the present invention, at least in the downstream side region of the collection-side conveyance path, an outer peripheral side selection path part that is formed on the outer peripheral side for sorting and passing the conveyed product, and subsequently downstream of the outer peripheral side selection path part. An outer peripheral side conveyance path portion that is formed and reaches the outer peripheral side downstream end portion, and an inner peripheral side conveyance path portion that is formed in parallel with the outer peripheral side sorting path portion and reaches the inner peripheral side downstream end portion. It is preferable to be provided. In this case, the outer perimeter sorting path section controls the transport mode of the transported object by performing sorting, single-rowing, single-layering, posture selection, posture switching, etc. by limiting the width or height of the transport path. To do. As a result, the supply amount, posture, conveyance density, etc., of the conveyed product are controlled in the collection-side conveyance path and returned to the supply-side alignment path, thereby improving the stability of the quantity and alignment state of the conveyed product in the supply-side alignment path. Therefore, high-speed and high-density conveyance and high accuracy of the alignment state can be achieved.

  In the present invention, between the recovery transfer unit and the supply transfer unit, the supply side inner portion of the supply side transport body and the recovery side inner portion of the recovery side transport body face each other laterally inside, It is preferable that the supply side inner part is provided with a partition wall extending upward from the recovery side inner part. In this case, it is desirable that the partition wall is provided with a covering portion having a shape that covers the gap between the supply side inner portion and the recovery side inner portion from above. According to this, the supply side inner portion and the collection side inner portion are configured to face each other sideways, so that the upstream portion of the collection side conveyance path is connected to the supply side alignment path exclusion path in the collection transfer section. The collection-side transport path is gradually raised relative to the supply-side alignment path while being arranged with a gap below the downstream end, and the downstream end of the collection-side transport path in the supply transfer section Can be arranged above the upstream portion of the supply side alignment path with a gap. In addition, by providing a partition wall extending upward from the collection side inner part on the supply side inner part, the transported object excluded from the supply side alignment path is placed in the gap in the facing region between the supply side inner part and the collection side inner part. It is suppressed that it falls to. In particular, the partition wall is provided with a covering portion having a shape that covers the gap between the supply-side inner portion and the collection-side inner portion from above, so that it is excluded from the supply-side alignment path and received by the supply-side conveyance path. The conveyed product is further reliably prevented from falling into the gap in the facing area between the supply side inner part and the collection side inner part. Here, it is desirable that the covering portion is formed so as to continuously protrude from the partition wall toward the collection side transport body.

  In the present invention, the supply-side alignment path (and the supply-side conveyance path, if provided) is configured in a straight line, and the recovery-side conveyance path includes an upstream portion and a downstream portion provided in the upstream-side protruding portion. It is preferable that the downstream portion provided in the side protruding portion has a planar shape of a] (square bracket) shape or a] (tortoise shell bracket) shape that protrudes to the side of the supply side conveyance body. . According to this, since the supply-side transport body can be configured linearly and easily configured symmetrically to the left and right of the supply direction, it is easy to ensure the alignment performance of the supply-side alignment path and the transport performance. It becomes easy to improve, and it becomes easy to stabilize a conveyance aspect. In particular, by reducing the asymmetry in the left-right direction of the supply-side transport body, an ideal vibration mode can be precisely realized, so that the transport performance can be improved. On the other hand, although the schematic structure of the collection-side transport body is asymmetrical to the left and right in the collection direction, the above projecting structure can avoid interference with the supply-side transport body except for portions that overlap in the vertical direction. It becomes easy to reduce the width and the size of the entire apparatus while ensuring a sufficient space in the left-right direction between the inner portions of the carrier.

  In the present invention, it is preferable that a minimum value of a gap between the supply side transport body and the recovery side transport body is larger than a maximum dimension value of the transported object. According to this, it is possible to suppress the occurrence of troubles due to the conveyance object biting into the gap and the two conveyance bodies interfering with each other or the gap being clogged with dust. Here, the said maximum dimension value means the maximum value of the length measured in various directions about the conveyed product. Moreover, in this invention, it is preferable to have separately the supply side vibration means to vibrate the said supply side conveyance body, and the collection | recovery side vibration means to vibrate the said collection side conveyance body. Moreover, it is desirable that the vibration frequency of the supply-side conveyance body that vibrates by the supply-side vibration means is higher than the vibration frequency of the collection-side conveyance body that vibrates by the collection-side vibration means. Furthermore, it is desirable that the vertical movement and amplitude of the vibration of the supply side transport body are smaller than the vertical movement and amplitude of the vibration of the collection side transport body.

  According to the present invention, it is possible to realize a circulation type conveying apparatus that can reduce conveyance defects and conveyance contamination associated with the miniaturization of conveyed items, and that can contribute to higher conveyance speed and higher conveyance mode density. An excellent effect can be achieved.

The perspective view (a) which shows a mode that the whole structure of embodiment of the circulation type conveying apparatus which concerns on this invention was seen from the side of the collection | recovery side conveyance body of diagonally forward, and the side of the supply side conveyance body of diagonally forward was seen. It is a perspective view (b) which shows a mode. FIG. 4 is an enlarged plan view (enlarged twice as large as FIG. 3) of the same embodiment. It is the left view (a), the front view (b), and the right view (c) of the embodiment. It is a cross-sectional arrow view which shows the cross section along the AA line of FIG. 2 of the embodiment in the direction of the arrow. It is a cross-sectional arrow view which shows the cross section along the BB line of FIG. 2 of the embodiment in the direction of the arrow. It is a cross-sectional arrow view which shows the cross section along CC line of FIG. 2 of the embodiment in the direction of an arrow. It is a cross-sectional arrow view which shows the cross section along the DD line of FIG. 2 of the embodiment in the direction of an arrow. It is a cross-sectional arrow view which shows the cross section along the EE line of FIG. 2 of the embodiment in the direction of an arrow.

  Next, an embodiment of a circulating transfer device according to the present invention will be described in detail with reference to the accompanying drawings. FIGS. 1 to 3 are external views showing the entire apparatus of this embodiment, and FIGS. 4 to 8 are enlarged sectional views of respective parts shown in FIG.

  The circulation type conveyance device 10 of the present embodiment includes a supply side conveyance body 11 mounted on the upper side of the supply side vibration mechanism 13 and a recovery side conveyance body 12 mounted on the upper side of the recovery side vibration mechanism 14. . The supply-side transport body 11 and the collection-side transport body 12 are attached in a posture parallel to each other. The supply side conveyance body 11 is comprised by the base block 11E mounted in the upper part of the supply side vibration mechanism 13, and the attachment block 11F attached to the upper part of this base block 11E. The supply-side vibration mechanism 13 is a top plate (not shown) that is elastically supported via two front and rear positions on a base plate (not shown) in a slightly inclined posture so as to face obliquely forward with respect to the supply direction. The top plate is configured to generate a reciprocating vibration that is obliquely upwardly directed forward in the supply direction F by an excitation source including a piezoelectric driving body (piezoelectric element) or an electromagnetic driving body (electromagnet) (not shown). The The supply-side transport body 11 (actually, the base block 11E) is mounted on the top plate.

  A collection-side vibration mechanism 14 on which the collection-side transport body 12 is mounted is disposed on the side of the supply-side vibration mechanism 13. The collection-side vibration mechanism 14 also has a plate spring and a top plate for elastic support (not shown) similar to the supply-side vibration mechanism 13 on the same base plate as the supply-side vibration mechanism 13. A reciprocating vibration is generated by the vibration source in the same manner as described above. The collection-side transport body 12 is mounted on this top plate. However, the vibration generated by the collection-side vibration mechanism 14 is a reciprocating vibration that is directed obliquely upward in the collection direction B opposite to the supply direction F. As a result, the supply direction F, which is the direction of conveyance of the conveyed product on the supply side alignment path 11 a and the supply side conveyance path 11 b on the supply side conveyance body 11, and the recovery side conveyance path 12 a on the collection side conveyance body 12. The collection direction B, which is the direction of conveyance of the conveyed product, is opposite to each other.

  Note that the supply-side vibration mechanism 13 generally has a relatively high vibration frequency (for example, 300 Hz to 1.5 kHz) at a relatively high speed so that the conveyed product is conveyed at a high speed in a stable posture in the supply-side alignment path 11a. By reducing the vertical movement of the vibration and reducing the amplitude, the supply-side transport body 11 is configured to give stable vibration so as not to include vibration modes other than the transport direction. As a result, the conveyed product is less likely to move up and down during conveyance, and the conveyance posture is also stable. On the other hand, as will be described later, the collection-side transport body 12 has an upward slope relative to the collection-side transport path 12a from the upstream side to the downstream side when the supply-side alignment path 11a and the supply-side transport path 11b are used as a reference. Therefore, unless the vertical movement and amplitude of the vibration applied by the collection-side vibration mechanism 14 are relatively increased, the conveyed product tends to stay and efficient conveyance cannot be performed. Therefore, the collection-side vibration mechanism 14 applies a vibration with a low vibration frequency (for example, about 50 to 200 Hz) in order to efficiently move the transported object in the upward-gradient collection-side transport path 12a and It is preferable to increase the vertical movement and amplitude to some extent. In addition, although it is a natural prerequisite in the vibration type transfer device, in the present embodiment, as described above, the supply-side transfer body 11 and the collection-side transfer body 12 are driven so as to exhibit different vibration modes. Both conveying bodies 11 and 12 are arranged so as to have a predetermined gap (at least a gap larger than the maximum dimension value of the conveyed object) so as not to contact each other during operation.

  The base block 11E of the supply-side transport body 11 has a mounting seat portion for attaching an attachment block 11F having an extended shape along the supply direction F, and the side of the mounting seat portion is substantially parallel to the supply direction F. A linear supply-side transport path 11b configured to extend is formed. The attachment block 11F attached to the attachment seat is formed with a linear supply side alignment path 11a configured to extend in the supply direction F. The supply-side alignment path 11a basically transports the transported objects arranged in a single layer and single row in a straight line, and in order to make the transported material received in the upstream part into a single layer and a single row. Alternatively, a width-limiting structure or a height-limiting structure for a transported object for sorting, a discharge airflow blowing structure 11p that operates according to a sensor output that detects the posture or shape of the transported object, a reverse airflow blowing structure, or the like Is provided with a known sorting region 11D having a configuration combined with a V-groove or R-groove track structure. The supply side alignment path 11a is not particularly limited, but is basically set to extend horizontally in order to realize reliable control of the conveyance state and high-efficiency conveyance.

  In addition, in the attachment block 11E, a transported object that has been excluded from the supply-side alignment path 11a by the above-described structures in a portion adjacent to the supply-side transport path 11b with respect to the supply-side alignment path 11a. An inclined surface (a surface on which the conveyed product slides) 11s for dropping toward the surface is formed. And in order to prevent sticking of a conveyance thing, all were formed in the conveyance bottom face of the supply side conveyance path 11b, and this inclined surface 11s so that a conveyance thing may move along the direction which moves. A plurality of R grooves are formed in parallel in a stripe shape. Here, it is desirable that the width of the flat portion between the R grooves is configured to be equal to or smaller than the size of the conveyed product. Further, instead of this R groove structure or together with this R groove structure, other sticking prevention processing such as shot blasting or low friction resin coating may be applied to the transport surface or the inclined surface. As described above, the supply-side transport body 11 moves the transported object in the supply direction F by vibration with a small vertical movement and amplitude with a high vibration frequency, so that it is fine and lightweight such as a minute electronic component. In the case of a conveyed product, the conveyed item is likely to stick to the conveyance surface, and is difficult to move smoothly and is likely to stay. Therefore, it is particularly effective to take the above measures.

  The transported material to be transported in the circulating transport device 10 of the present embodiment is not particularly limited, but examples include electronic components such as an electric resistance, a capacitor (multilayer ceramic capacitor), an inductor, a diode, and a transistor. Suppose a cube with rounded corners. The size of the conveyed product has a size generally called 0201, specifically, a length L = 0.25 mm, a thickness and a width d = 0.125 mm. Here, in the case of a cube-shaped conveyance object as described above, the maximum dimension value of the conveyance object is one vertex of four vertices at one end in the length direction and four at the other end. Of the two vertices, the one vertex is connected to a vertex in a diagonal position (that is, a vertex that cannot be reached from the one vertex through only one ridge line or only one surface). The length corresponding to the distance between the two vertices is measured. Moreover, the apparatus size of this embodiment corresponding to the said conveyed product has a full length of a supply direction of about 200 mm.

  In the present embodiment, the supply-side transport path 11b is configured in a straight line and is formed in parallel with the supply-side alignment path 11a. Here, the gradient seen in the supply direction F of the supply side conveyance path 11b may be horizontal as in the case of the supply side alignment path 11a. Thus, it may be formed to have a slight downward slope. Further, in the supply-side transport path 11b, the upstream end portion to the downstream portion is formed in a straight line shape having a bowl-shaped cross-sectional groove, but the downstream end portion 11be opens sideways, A conveying surface formed to have a slight downward slope is provided. The plurality of R grooves are also formed on the conveyance bottom surface of the downstream end portion 11be, but these R grooves extend in the supply direction F like other portions of the supply side conveyance path 11b. Instead, it has a shape extending in the direction along the downward gradient, that is, in the side toward the adjacent collection-side transport path 12a. The downstream end portion 11be of the supply side conveyance path 11b and the upstream portion of the collection side conveyance path 12a constitute a collection transfer unit X described later.

  The downstream end portion 11be of the supply-side transport path 11b extends in a direction substantially orthogonal to the supply direction F determined by the vibration direction of the supply-side transport body 11, so that the transported material can be smoothly discharged to the collection-side transport path 12a. In addition, the conveyance bottom surface is inclined by a predetermined angle β toward the collection-side conveyance path 12a to form a downward gradient. In the illustrated example, the angle β is about 5 degrees to 10 degrees.

  In the present embodiment, the collection-side conveyance path 12a includes an upstream portion disposed below the downstream end portion 11be of the supply-side conveyance path 11b, and is formed to have a slight upward gradient toward the collection direction. Yes. The collection-side conveyance path 12a has a bowl-shaped cross section as a whole, but includes a conveyance bottom surface 12ad inclined in the width direction toward the outer peripheral side until reaching the downstream portion as shown in FIG. The conveyance bottom surface 12ad of the collection-side conveyance path 12a is gradually raised toward the downstream side as shown in FIG. Then, in the downstream portion of the collection-side conveyance path 12a, as shown in FIG. 6, the narrow-side narrowed outer circumferential side is narrowed down from the upstream side to the outer circumferential side in the width direction of the collection-side conveyance path 12a. A path portion 12b is continuously formed on the downstream side of the conveyance bottom surface 12ad. Further, subsequently to the downstream side of the outer peripheral side sorting path portion 12b, as shown in FIG. 7, an outer peripheral side transport path portion 12c formed so as to have a concave (樋 -shaped) cross-sectional structure is formed. This outer peripheral side conveyance path part 12c reaches the outer peripheral side downstream end part 12ce, and constitutes an outer peripheral side supply transfer part Yo for transferring the conveyed product to the upstream part of the supply side alignment path 11a. In addition, the recovery-side transport path 12a is formed with an inner-periphery-side transport path portion 12d formed so as to have a concave (tubular) cross-sectional structure in parallel with the outer-periphery-side sorting path portion 12b. The inner circumferential conveyance path portion 12d reaches the inner circumferential downstream end portion 12de, and constitutes an inner circumferential supply transfer section Yi that transfers the conveyed product to the upstream portion of the supply conveyance path 11b. The outer periphery side supply transfer unit Yo and the inner periphery side supply transfer unit Yi constitute the supply transfer unit Y described above.

  As shown in FIG. 4, the collection-side transport body 12 has a portion corresponding to the upstream portion of the collection-side transport path 12 a protruding sideways toward the supply-side transport body 11, and the supply-side transport path of the supply-side transport body 11. An upstream protrusion 12E is provided below the downstream end 11be of 11b. On the upper surface of the upstream protruding portion 12E, the end of the linear collection side conveyance path 12a along the collection direction B is refracted with respect to the collection direction B, that is, on the supply side conveyance body 11. An upstream end portion 12ae extending straightly or obliquely is formed. The bottom surface of the upstream end portion 12ae of the collection-side conveyance path 12a is inclined downward toward the outer peripheral side, that is, the side away from the supply-side conveyance body 11, similarly to the other parts of the collection-side conveyance path 12a on the downstream side. (An angle α). Here, the angle α is for gathering the transported objects to the outer peripheral side in the collection-side transport path 12a and aligning the transported objects with high density along the outer peripheral side sorting path portion 12b described later. The angle α is usually about 5 to 10 degrees. Note that the conveyance bottom surface 12ad of the collection-side conveyance path 12a in the illustrated example does not include a plurality of R-groove structures unlike the supply-side conveyance path 11b. This is because the vertical movement and amplitude of the vibration of the collection-side transport body 12 is larger than that of the supply-side transport body 11, so that the transported object is less likely to stick to the transport bottom surface 12ad and the transported object stays in some places. Because.

  With the above-described structure, in the recovery transfer section X, the downstream end portion 11be of the supply side transport path 11b protrudes above the upstream portion of the recovery side transport path 12a (upstream end portion 12ae in the illustrated example) with a gap. It is said. That is, a part of the supply-side transport body 11 constituting the downstream end portion 11be projects sideways, whereby the upstream-side projecting portion of the recovery-side transport body 12 including the upstream end portion 12ae of the recovery-side transport path 12a. 12E is arranged in a state of being spaced upward. As a result, the conveyed product that has fallen from the downstream end portion 11be to the upstream end portion 12ae is less likely to enter the gap between the supply-side conveyance body 11 and the collection-side conveyance body 12, and the conveyance object, dust, or the like temporarily enters the gap. Even if it enters, it is configured so that it will not be caught between both transport bodies. For example, as shown in FIG. 4, in the overhang structure described above, it is preferable that the vertical gap Gtx between the transport bodies 11 and 12 is secured to be larger than the maximum dimension of the transported object. However, the vertical gap Gtx takes into account the vertical movement strokes of the supply-side transport body 11 and the collection-side transport body 12, and when the vibrations of both transport bodies are in opposite phases, It is designed to have a value larger than the maximum dimension value of the conveyed product so that the conveyed product is not trapped by the movement. For example, if the transported object is the above-mentioned 0201 size, it is preferably 0.4 mm or more in consideration of the above-described vertical stroke of vibration, and in the illustrated example, the gap Gtx is set to 0.4 mm-0. The value is about 5 mm. In this way, it is possible to prevent clogging of not only conveyed objects but also dust and the like.

  On the other hand, as shown in FIGS. 7 and 8, the collection-side transport body 12 projects toward the supply-side transport body 11 (side) near the downstream end, and the supply-side transport body 11 is aligned on the supply side. A downstream projecting portion 12F is provided above the upstream portion of the path 11a and the supply-side transport path 11b. The downstream protrusion 12F includes an outer peripheral protrusion 12Fo that constitutes the outer peripheral downstream end 12ce of the outer peripheral transport path 12c and the inner peripheral transfer part Yi in the outer peripheral transfer part Yo. The inner circumferential side projecting portion 12Fi constituting the inner circumferential side downstream end portion 12de of the inner circumferential side conveyance path portion 12d. Here, the outer peripheral side downstream end portion 12ce formed in the outer peripheral side protruding portion 12Fo has a structure protruding above the upstream portion of the supply side alignment path 11a with a gap, and the inner peripheral side protruding portion 12Fi has The formed inner peripheral downstream end 12de has a structure protruding above the upstream portion of the supply-side transport path 11b with a gap. Here, since the supply side alignment portion 11a is located at a position farther from the collection side conveyance body 11 than the supply side conveyance path 11b, the outer peripheral side protrusion portion 12Fo protrudes to the side from the inner peripheral side protrusion portion 12Fi. Out) Large amount. In this supply transfer unit Y (outer peripheral side transfer transfer unit Yo and inner peripheral supply transfer unit Yi), the vertical gaps Gtyo (see FIG. 8) and Gtyi (see FIG. 7) are the same as the gap Gtx. It is preferable that the value is larger than the maximum dimension value of the conveyed product, for example, 0.4 mm or more. In the illustrated example, each value is designed to be about 0.5 mm to 0.6 mm.

  As shown in FIG. 8, the downstream end 12ce of the outer peripheral side conveyance path portion 12c extends in a direction substantially orthogonal to the collection direction B, so that the conveyed product smoothly moves on the conveyance surface of the downstream end portion 12ce, In order to be able to transfer to the supply side alignment path 11a, it is formed so as to have a downward slope (angle γ) toward the overhang destination. This angle γ is usually about 5 degrees to 10 degrees.

  In the present embodiment, the collection-side conveyance path 12a formed in the collection-side conveyance body 12 is lower at the upstream end portion 12ae than the downstream end portion 11be of the supply-side conveyance path 11b formed in the supply-side conveyance body 11. In the outer peripheral side downstream end portion 12ce and the inner peripheral side downstream end portion 12de, the upstream side of the supply side alignment path 11a formed in the supply side transport body 11 and the upstream portion of the supply side transport path 11b are higher. is there. For this reason, the collection-side transport body 12 must be configured to reverse the height of the transport surface in the middle of the upstream portion and the downstream portion on the side of the supply-side transport body 11. For this reason, in the area | region between the said upstream protrusion part 12E and the downstream protrusion part 12F of the collection | recovery side conveyance body 12, the inner side part of the collection | recovery side conveyance body 12 and the inner side part of the supply side conveyance body 11 are FIG. And as shown in FIG. 6, it arrange | positions so that it may mutually face mutually spaced apart.

  At this time, when the transported object removed from the supply side alignment path 11a falls to the supply side transport path 11b, the transported object drops in the left-right gap Gs between the inner side surfaces due to too strong momentum such as airflow. There is a risk of biting. Similarly, there is a possibility that dust or the like may be clogged in the gap Gs even if it is not a conveyed product. For this reason, in the present embodiment, the gap Gs in the left-right direction is set to a value larger than the maximum dimension value of the conveyed object so as not to bite the conveyed object, similarly to the gaps Gtx, Gtyo, and Gtyi. doing. In the illustrated example, Gs is designed to be about 0.5 mm to 1.0 mm. Further, in order to prevent the conveyed product from dropping toward the gap Gs, on the inner side of the supply-side conveyance body 11, that is, on the inner side of the supply-side conveyance path 11b (the side facing the collection-side conveyance body 12), the collection side A partition wall 11t that is higher than the inner side of the carrier 12 is formed. A covering portion 11ta that covers the gap Gs from above is formed on the upper portion of the partition wall 11t. By providing the covering portion 11ta, it is possible to completely eliminate room for a conveyed product or dust to enter the gap Gs. In the illustrated example, the covering portion 11ta includes a structure that continuously protrudes from the partition wall 11t (preferably the upper end thereof) toward the supply-side transport body 12.

  As shown in FIG. 2, the collection-side transport body 12 is formed such that the collection-side transport path 12 a has a shape of] or] when viewed in a plan view. With such a planar shape, a sufficient gap is ensured so that the transport bodies 11 and 12 do not interfere with each other, and the upstream end and the downstream end of the collection-side transport path 12a are vertically spaced as described above. Thus, the recovery transfer portion X and the supply transfer portion Y that are projected can be formed. Such a structure is such that the collection-side transport body 12 includes the upstream-side protruding portion 12E and the downstream-side protruding portion 12F, so that even when viewed along a cross section orthogonal to the supply direction F and the collection direction B, It means that the carrier 12 has a shape of] or]. Such a structure is useful for compactly configuring the entire apparatus while ensuring a gap between the two carriers 11 and 12. Note that the discharge unit 12p is provided to discharge the remaining transported object after changing the lot of the transported object. In addition, when a new conveyed product is given from the outside of the circulation type conveying device 10, a hopper or the like is used to provide an upstream side of the outer peripheral side downstream end portion 12ce and the outer peripheral side sorting path portion 12b of the collection side conveying path 12a. What is necessary is just to supply a conveyed product to a halfway position etc.

  According to the present embodiment described above, in the recovery transfer unit X and the supply transfer unit Y (the outer peripheral side supply transfer unit Yo and the inner peripheral side supply transfer unit Yi), the above-described overhang structure is provided, Even if the transported object is miniaturized, the transported object or dust can be prevented from being entrained, and the transported object can be prevented from being damaged, generating dust, or affecting the vibration mode. Further, the overhang structure is formed between the supply-side transport body 11 and the recovery-side transport body 12 in the recovery transfer unit X and the supply transfer unit Y (the outer peripheral side supply transfer unit Yo and the inner peripheral side supply transfer unit Yi). In order to make it possible to provide large vertical and horizontal gaps Gtx, Gtyo, Gtyi, Gs, the vibration mode of the supply-side transport body 11 and the vibration mode of the recovery-side transport body 12 are greatly different, or Further, even when the vertical movement and amplitude of the vibration of the collection-side transport body 12 are large, it is not necessary to consider the influence on the transported object due to the difference in level difference or gap in each transfer section.

  In the present embodiment, the supply-side transport body 11 is provided with a supply-side transport path 11b parallel to the supply-side alignment path 11a, and the upstream-side protrusion 12E and the downstream-side protrusion 12F of the collection-side transport body 12 are supplied to the supply side. Since the recovery transfer portion X and the supply transfer portion Y are configured by projecting sideways toward the transport body 11, the downstream end portion 11be of the supply side transport path 11b and the downstream end portion of the recovery side transport path 11a Even when the (outer peripheral downstream end portion 12ce and inner peripheral downstream end portion 12de) are formed in a range limited to the supply direction F and the recovery direction B, the conveyed product can be reliably transferred. For this reason, the sorting region 11D (see FIG. 2), which is a range in the supply direction F that can be used for the sorting process in the supply side alignment path 11a, is secured relatively wide by the limited width of each downstream end. There is an advantage that you can.

  In particular, in recent years, there has been an increasing demand for reducing the contamination of the conveyed product by limiting the conveyance distance of the conveyed product to be supplied as much as possible. Although it is desired to reduce the total length of the apparatus when viewed in the collection direction B, on the other hand, since the required level of sorting accuracy is also high, the length of the sorting region 11D must be ensured to some extent. In this embodiment, even if the overall length of the apparatus is reduced by the above structure, a large set ratio of the sorting area 11D can be secured, so that it is possible to reduce the transport distance of the transported object while securing the sorting accuracy.

  In addition, the circulation type conveying apparatus of the present invention is not limited to the above-described illustrated examples, and it is needless to say that various changes can be made without departing from the gist of the present invention. For example, in the above-described embodiment, the supply-side transport body 11 is provided with the supply-side transport path 11b, and the collection-side transport path 12a is formed with the outer-periphery-side sorting path portion 12b, the outer-periphery-side transport path portion 12c, and the inner-periphery-side transport path portion 12d. However, it is possible to configure without providing at least one of these.

DESCRIPTION OF SYMBOLS 10 ... Circulation type conveying apparatus, 11 ... Supply side conveyance body, 11a ... Supply side alignment path, 11b ... Supply side conveyance path, 11be ... Downstream end part, 11s ... Inclined surface, 11D ... Sorting area | region, 11E ... Base block, 11F ... Attachment block, 11 t ... Partition wall , 11 t a ... Covering part, 12 ... Collection side transport body, 12a ... Collection side transport path, 12b ... Outer peripheral side sorting path section, 12c ... Outer peripheral side transport path section, 12ce ... Outer peripheral side Downstream end, 12d ... inner peripheral side conveyance path, 12de ... inner peripheral downstream end, 12E ... upstream protruding part, 12F ... downstream protruding part, 12Fo ... outer peripheral side protruding part, 12Fi ... inner peripheral side protruding part , 13 ... supply side vibration mechanism, 14 ... collection side vibration mechanism,

Claims (7)

A supply-side transport body having a supply-side alignment path that exhibits a vibration mode for transporting a transported object in a predetermined supply direction, and a vibration mode for transporting the transported material in a collection direction opposite to the supply direction. A collection side having a collection side conveyance path that accepts the conveyance object removed from the supply side alignment path, conveys the conveyance object in the collection direction, and returns at least a part of the conveyance object to the upstream side of the supply side alignment path. In the circulation type transport device comprising the side transport body,
A collection transfer unit that transfers the conveyed product that has been excluded from the supply side alignment path to the collection side conveyance path; and a supply transfer unit that transfers the conveyance item that has been conveyed by the collection side conveyance path to the supply side alignment path; Is provided,
In the collection transfer section, a downstream end portion of the conveyance path of the conveyed product from the supply side alignment path projects above the upstream section of the collection side conveyance path with an interval, and
In the supply transfer unit, a downstream end portion of the collection-side conveyance path projects above the upstream portion of the supply-side alignment path with an interval,
The overhanging structure in the recovery transfer unit includes an upstream projecting portion projecting sideways toward a lower side of a portion where the downstream end portion of the exclusion path from the supply side alignment path of the supply side transport body is formed. It is configured by being provided on the collection side transport body,
The overhang structure in the supply transfer unit is provided with a downstream protrusion that protrudes laterally toward the upper side of the portion where the upstream part of the supply side alignment path of the supply side transport body is formed. Configured by
In the region between the upstream projecting portion and the downstream projecting portion of the recovery side transport body, the inner side surface of the supply side transport body and the inner side surface of the recovery side transport body are spaced apart from each other laterally. Arranged to face each other,
The upstream projecting portion projects beyond the extension range of the gap between the inner side surfaces toward the supply- side transport body, while the downstream end portion of the supply-side transport body is within the extension range of the gap. On the other hand, it does not protrude toward the collection side transport
The downstream projecting portion projects beyond the extension range of the gap toward the supply-side transport body, while the upstream portion of the supply-side transport body transports the recovery side relative to the extension range of the gap. Does not protrude to the side of the body,
A circulation type conveying apparatus characterized by that. The minimum value of the gap between the supply-side transport body and the collection-side transport body is larger than the maximum dimension value of the transported object,
The circulation type conveying apparatus according to claim 1. In parallel with the supply side alignment path, the supply side transport body receives a transported object removed from the supply side alignment path and transports it in the supply direction between the upstream portion of the recovery side transport path A supply-side conveyance path provided with a downstream end portion constituting the recovery transfer section as a downstream end portion of the exclusion path,
The circulation type conveying apparatus according to claim 1 or 2, characterized in that. As the supply transfer section, a transported object transported by the recovery side transport path between the outer peripheral side downstream end of the recovery side transport path and the upstream part of the supply side alignment path is used as the supply side alignment path. An outer periphery side supply transfer section for transfer is provided,
As the second supply transfer section, the transported object transported by the recovery side transport path between the inner peripheral downstream end of the recovery side transport path and the upstream section of the supply side transport path is the supply side. An inner peripheral side supply transfer unit for transferring to the conveyance path is provided.
The circulation type conveying device according to claim 3 characterized by things. In at least the downstream area of the collection side conveyance path,
An outer peripheral side selection path portion formed on the outer peripheral side for selecting and passing the conveyed product;
An outer peripheral side conveying path portion formed downstream from the outer peripheral side sorting path portion and reaching the outer peripheral side downstream end portion;
Formed in parallel to the outer periphery side sorting path portion, the inner periphery side transport path portion reaching the inner periphery side downstream end, and
Is provided,
The circulation type conveyance device according to claim 4 characterized by things. Between the recovery transfer unit and the supply transfer unit, the supply side inner portion of the supply side transport body and the recovery side inner portion of the recovery side transport body face each other laterally inside,
The supply side inner portion is provided with a partition wall extending upward from the collection side inner portion.
The circulation type conveying apparatus according to any one of claims 1 to 5, wherein: The partition wall is provided with a covering portion having a shape that covers the gap between the supply side inner portion and the recovery side inner portion from above.
The circulation type conveying apparatus according to claim 6.

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