JP6206962B2 - Article transport feeder - Google Patents

Description

  The present invention relates to an article transport feeder that transports an object to be transported from one side to the other.

  2. Description of the Related Art Conventionally, an article conveyance feeder that conveys various articles such as parts, food, and medicine from one to the other is known. For example, in Patent Document 1 below, 2 masses are oscillated back and forth by a trough drive unit attached to a base with a trough supported via a leaf spring with respect to a base installed on a floor surface via a vibration isolation member. A system vibration conveyor (corresponding to an article conveying feeder) is disclosed. In this case, the trough drive unit reciprocally vibrates the trough by rotating and driving two drive shafts respectively holding two unbalanced weights in directions symmetrical to the conveyance direction of the object to be conveyed. The pushing and pulling force is generated.

JP 2004-91193 A

  However, in the article conveying feeder described in Patent Document 1, two drive shafts are arranged with a sufficient interval between them to avoid interference (physical contact) between two unbalanced weights adjacent to each other. Therefore, there has been a problem that the apparatus configuration becomes large.

  The present invention has been made to address the above-described problems, and an object of the present invention is to provide an article transport feeder that can make the apparatus configuration compact.

In order to achieve the above object, the features of the present invention described in claim 1 are: a trough for placing an article to be conveyed; a trough driving unit for reciprocally vibrating the trough; and a trough for conveying the trough on a base. An article transport feeder that transports an object to be transported from one side to the other with a trough support that supports the trough support in a state that can be reciprocally displaced in the transport direction. The trough drive unit includes two trough drive units arranged in parallel to each other A weight drive shaft, a drive motor that drives the two weight drive shafts to rotate in reverse directions, and a center of gravity at a position off the rotational axis of each weight drive shaft, and acts on each center of gravity when each weight drive shaft is driven to rotate And a pair of unbalanced weights respectively provided on each weight drive shaft so that the directions of the centrifugal forces that coincide with each other every 180 ° are provided. DOO are provided on each of the two unbalanced weights and other weights the drive shaft position of two unbalanced weights and different from each other axially provided provided on one of the weight driving shaft, two weights The drive shaft is set such that the distance between the rotation shafts is longer than the rotation radius of the unbalanced weight and shorter than twice the rotation radius, and each of the drive shafts faces each of the two unbalanced weights. Cylindrical sleeves are respectively provided on the weight drive shafts, and the sleeves are formed with a thickness greater than the thickness of each unbalanced weight .

In order to achieve the above object, the features of the present invention described in claim 2 are: a trough for placing the article to be conveyed; a trough drive unit for reciprocating vibration of the trough; and a trough for conveying the trough on the base. An article transport feeder that transports an object to be transported from one side to the other with a trough support that supports the trough support in a state that can be reciprocally displaced in the transport direction. The trough drive unit includes two trough drive units arranged in parallel to each other A weight drive shaft, a drive motor that drives the two weight drive shafts to rotate in reverse directions, and a center of gravity at a position off the rotational axis of each weight drive shaft, and acts on each center of gravity when each weight drive shaft is driven to rotate A pair of unbalanced weights provided on each of the weight drive shafts in such a direction that the centrifugal force directions coincide with each other every 180 °, and rotational driving of the drive motor. A pair of unbalanced weights are provided at positions in the axial direction where the unbalanced weight provided on one weight drive shaft and the unbalanced weight provided on the other weight drive shaft are different from each other. The two weight drive shafts are set such that the distance between the rotation axes is longer than the rotation radius of the unbalanced weight and shorter than twice the rotation radius, and the control device supports the trough. A first frequency that is higher than the natural frequency of the entire object supported by the plate and capable of conveying the object to be conveyed; a frequency that is higher than the natural frequency and lower than the first frequency; It is to control the operation of the drive motor so as to selectively reciprocate the trough at at least two frequencies of the second frequency .

According to the feature of the present invention configured as described above, the article conveying feeder has a distance between the rotation axes of the two weight drive shafts that is longer than the rotation radius of the unbalanced weight and shorter than twice the rotation radius. It is set to length. That is, the article transporting feeder is configured so that the unbalanced weight held by one weight drive shaft of the two weight drive shafts and the unbalanced weight held by the other weight drive shaft enter each other from the outer peripheral portion. Two weight drive shafts are arranged close to each other so as to overlap each other in the axial direction of the drive shaft. Thereby, since the article conveyance feeder can set the distance between the rotating shafts of two weight drive shafts shorter, the apparatus configuration can be made compact.

According to the feature of the present invention as set forth in claim 1, this facilitates the assembling process in which the article conveying feeder alternately arranges the unbalanced weight and the unbalanced weight along the axial direction. Further, according to the feature of the present invention described in claim 2, the article transport feeder is capable of transporting the transport target article in a standby state in which the trough reciprocally vibrates with a strength that cannot transport the transport target article. Since it can operate in the conveyance state in which the trough is reciprocally oscillated with the strength that can be generated, it is possible to avoid a resonance state in a standby state where the article to be conveyed is not conveyed.

According to another aspect of the present invention, in the article transporting feeder, the pair of unbalanced weights includes two unbalanced weights provided on one weight drive shaft and two of the above-described unbalanced weights provided on the other weight drive shaft. The unbalanced weights are provided at different axial positions, and the two weight drive shafts are provided with cylindrical sleeves on the respective weight drive shafts respectively opposed to the two unbalanced weights. The sleeve is formed with a thickness greater than the thickness of each unbalanced weight. Accordingly, the article transporting feeder can easily perform an assembly process in which the unbalanced weight and the unbalanced weight are alternately arranged along the axial direction.

Another feature of the present invention is that, in the article transporting feeder, each unbalanced weight can be changed in its mounting position in the circumferential direction with respect to each weight drive shaft, and the sleeve is driven by each weight body on the outer peripheral portion. The scale is provided along the circumferential direction of the shaft. As a result, the article transporting feeder can adjust the balance of the center of gravity between the two unbalanced weights since the mounting position of the pair of unbalanced weights can be changed in the circumferential direction with respect to each weight drive shaft. The tractive drive force generated by the trough drive unit can be freely adjusted. In addition, since the article conveying feeder is provided with a scale sleeve on each weight body drive shaft, it is possible to prepare and accurately position each unbalanced weight in the circumferential direction.

In these cases, in the article transporting feeder, the driving motor can be constituted by one driving motor that transmits the rotational driving force to the two weight driving shafts. According to this, since the trough drive unit rotationally drives the two weight drive shafts with one drive motor, the article transport feeder can simplify and make the device configuration simple.

Further, in these cases, in the article transporting feeder, the trough drive unit includes a disk-like drive-side disk that is rotationally driven by a drive motor, a driven-side disk that is connected to each weight drive shaft, and a drive-side disk. A ring-shaped annular transmission member spanned between the body and each driven disk member. According to this, since the trough drive unit is composed of the drive side disk body, the driven side disk body, and the annular transmission body, that is, the wrapping transmission mechanism, the article conveyance feeder has a simple structure and is quiet. Power can be transmitted well. The drive side disk body and the driven side disk body include a flat pulley with a flat portion on which the annular transmission is applied, a toothed pulley with teeth and grooves formed on the portion on which the annular transmission is applied, and a sprocket. There is. Further, as the annular transmission body, a flat belt formed in a belt shape, a toothed flat belt formed in a belt shape and formed with teeth and protrusions that are hung on the teeth and grooves in the driving side disk body and the driven side disk body, or In addition to the V-belt formed in a rope shape, there are chains.

Further, in these cases, in the article transporting feeder, the mounting position of the pair of unbalanced weights can be changed in the circumferential direction with respect to each weight drive shaft, and each of the two weight drive shafts has a horizontal rotation drive shaft that is horizontal. It can be provided parallel to the direction. According to this, in the article transport feeder, each rotational drive shaft of the two weight drive shafts is provided in parallel to the horizontal direction, and each unbalanced weight is attached in the circumferential direction with respect to the weight drive shaft. Therefore, the action direction of the pushing / pulling force generated by the trough drive unit can be changed by the mounting position of the unbalanced weight in the circumferential direction. That is, the article transport feeder can adjust the direction of the pushing and pulling force generated by the trough drive unit with respect to the center of gravity of the trough, so that the vibration efficiency of the trough can be improved and the transported article placed on the trough It is possible to respond flexibly to changes in the object.

In these cases, the article transport feeder further includes a control device that controls the rotational drive of the drive motor, and the control device has a first frequency higher than the natural frequency of the entire object supported by the trough support plate. The operation of the drive motor can be controlled to selectively reciprocate the trough at at least two frequencies of a second frequency higher than one frequency. According to this, the article conveying feeder has a first frequency higher than the natural frequency of the entire object supported by the trough support plate and a second frequency higher than the first frequency by the control device controlling the rotational drive of the drive motor. Since the trough is selectively reciprocated between two frequencies, the article transport feeder can be operated in two states without bringing the article transport feeder into a resonant state. For example, the article transport feeder operates in a standby state in which the trough is reciprocally oscillated with a strength that cannot convey the object to be transported, and a transport state in which the trough is reciprocally oscillated with a strength that can transport the object to be transported Therefore, it is possible to avoid a resonance state during a standby state where the article to be transported is not transported. In addition, the article transport feeder can transport an object to be transported at two transport speeds.

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It is the side lineblock diagram showing the outline composition and system outline of the article conveyance feeder concerning one embodiment of the present invention. It is the back side sectional view showing the outline of the composition of the article conveyance feeder seen from line 2-2 shown in FIG. FIG. 2 is a partially broken cross-sectional view illustrating an outline of a configuration of a trough drive unit viewed from an arrow 3 illustrated in FIG. It is a top view which shows typically the structure of the drive side disk body seen from the arrow 4 shown in FIG. 1, two driven side disk bodies, and an annular transmission body. FIG. 5 is a cross-sectional view illustrating an outline of a configuration of a trough drive unit as viewed from line 5-5 illustrated in FIG. 3. (A)-(e) is explanatory drawing which shows in time series the relative positional relationship of the gravity center of each unbalanced weight attached to the two weight drive shafts shown in FIG. It is the side surface lineblock diagram showing the outline composition and the outline of the system of the article conveyance feeder concerning the modification of the present invention. (A)-(e) is the description shown in time series which shows the relative positional relationship of the gravity center of each unbalanced weight which is respectively attached to two weight drive shafts in the article conveyance feeder shown in FIG. FIG.

  Hereinafter, an embodiment of an article conveyance feeder according to the present invention will be described with reference to the drawings. FIG. 1 is a side configuration diagram showing an outline of an external configuration of an article conveyance feeder 100 according to the present invention. The article transport feeder 100 is supplied with various articles such as parts, food, or medicines as articles to be transported in a factory, and intermittently transports the articles to be transported from one side to the other while temporarily holding the articles to be transported. This is a vibration type hopper device.

(Configuration of article transport feeder 100)
The article conveyance feeder 100 includes a base 101. The base 101 is a part that serves as a base for supporting various parts constituting the article transporting feeder 100, and is configured by assembling metal plate materials into a rectangular frame shape. The base 101 is fixed to a floor surface on which the article conveyance feeder 100 is installed by a fixing tool such as a bolt directly or via a vibration-proof elastic member such as a rubber material. On the other hand, a trough support 102 and a trough 103 are provided on the base 101.

  The trough support 102 is a part that supports the trough 103 while elastically deforming in order to reciprocate the trough 103 in the conveying direction (left direction) of the article to be conveyed (not shown), and the trough 103 on which the article to be conveyed is placed. It is comprised with the metal plate-shaped body which can support. More specifically, as shown in FIG. 2, the trough support body 102 is configured to have bent edges 102 a formed by bending the center portions of two side edges extending in the vertical direction in the figure in a rectangular plate material. ing.

As a result, the trough support 102 has the two bent edges 102a to increase the rigidity between the bent edges 102a and buckle or bend, and elastically deforms between both ends in the width direction where the bent edges 102a are not formed. It is easily formed. The trough support 102 has two each in the transport direction and in the width direction orthogonal to the transport direction so that the plate surface of the trough support 102 faces the transport direction in which the trough 103 transports the object to be transported. Is provided.

  Each of the four trough supports 102 is fixedly connected to the base 101 by bolts at the lower end in the figure while being inclined with respect to the horizontal direction, and the upper end in the figure is at the trough. 103 are fixedly connected to the hopper base 105 by bolts. In this case, preferably, each of the four trough supports 102 is perpendicular to the extension line TL of the plate surface of each of the four trough supports 102 with respect to the extension line FL of the pushing and pulling force F generated by the trough drive unit 110 described later. It is good to be attached at an angle. In this case, more preferably, the extension line FL of the pushing and pulling force F is the center of gravity position SP of the whole object supported by the four trough supports 102, specifically, the center of gravity position SP of the trough 103 and the trough drive unit 110. It is good to pass.

The trough 103 is a component that constitutes a storage unit and guide path that transports an article to be transported from one side to the other while mainly containing a hopper 104 and a hopper base 105. Among these, the hopper 104 is a long metal container that conveys an object to be conveyed from the one (right side in the figure) to the other (left side in the figure) while temporarily holding the article to be conveyed. The hopper 104 is provided with walls on three sides of the bottom portion on which the article to be transported is placed, specifically, on the width direction of the hopper 104 and on the rear side (right side in the drawing) of the article to be transported. The upper part in the figure for introducing the object to be conveyed and the front side in the conveying direction (the left side in the figure) for delivering the object to be conveyed are opened to form the inlet 104a and the outlet 104b, respectively.

  The hopper base 105 is a component that supports the hopper 104 and the trough drive unit 110, and is configured by assembling metal plates in a cross-beam shape. In this case, the hopper base 105 supports the hopper 104 so as to be inclined downward toward the front of the conveyance target article in the conveyance direction. In addition, a trough drive unit 110 is provided at the rear end of the hopper base 105 in the conveyance direction of the object to be conveyed. In FIG. 1, the broken line arrow shown in the upper part of the hopper 104 indicates the reciprocating vibration direction of the trough 103, and the broken line arrow in front of the discharge port 104b of the hopper 104 (the left side in the figure) indicates the conveyance direction of the article to be conveyed. Is shown.

  As shown in FIG. 3, the trough drive unit 110 is a drive force generation mechanism that generates a pushing force F for reciprocating displacement of the trough 103 by converting electric energy into a linear reciprocating motion. In the case 111 formed in the shape, the drive motor 112, the drive side disk body 113, the annular transmission body 114, the driven side disk bodies 115 and 116, the weight drive shafts 117 and 118, the unbalanced weights 121 and 122, the sleeve 123, 124 respectively. Among these, the drive motor 112 is an electric motor that is operated and controlled by a control device 130 described later to rotate the weight drive shafts 117 and 118, respectively, and is fixed in the case 111. A drive-side disc body 113 is provided on the drive shaft 112 a of the drive motor 112.

  The drive side disk body 113 is a pulley for transmitting the rotational driving force of the drive motor 112 to the driven side disk bodies 115 and 116 via the annular transmission body 114. The drive-side disc body 113 has concave and convex teeth (not shown) that mesh with the annular transmission 114 on the circumferential surface around which the annular transmission 114 is wound. That is, the drive side disk body 113 is a so-called toothed pulley in the present embodiment.

  The annular transmission body 114 is an annular flat belt for transmitting the rotational driving force of the drive side disk body 113 to the driven side disk bodies 115 and 116, respectively. On the front and back surfaces of the annular transmission body 114, concave and convex teeth (not shown) that mesh with the driving side disk body 113 and the driven side disk bodies 115 and 116, respectively, are formed. As shown in FIG. 4, the annular transmission body 114 has a driving-side disk body 113 and a driven-side disk body 115 wound around the back surface (inner surface) of the annular transmission body 114 and the surface of the annular transmission body 114. (Outside surface) A driven-side disc body 116 is hung. As a result, the driven-side disk body 115 is driven to rotate in the same rotational direction as the driving-side disk body 113, and the driven-side disk body 116 is rotated in the opposite direction to the rotational directions of the driving-side disk body 113 and the driven-side disk body 115. To drive.

  The driven-side disk bodies 115 and 116 are pulleys for transmitting the rotational driving force transmitted by the annular transmission body 114 to the weight driving shafts 117 and 118, respectively, and are attached to the respective distal end portions of the weight driving shafts 117 and 118. ing. As for these driven side disk bodies 115 and 116, the uneven | corrugated tooth | gear (not shown) which meshes with the annular transmission body 114 is formed in the circumferential surface where the annular transmission body 114 is hung. In other words, the driven disk bodies 115 and 116 are so-called toothed pulleys in the present embodiment.

  The weight drive shafts 117 and 118 are metal rods that hold and rotate the unbalanced weights 121 and 122, respectively, and the weight drive shaft 117 and the weight drive shaft 118 are parallel to each other via a bearing. The case 111 is rotatably held. In this case, the weight drive shaft 117 and the weight drive shaft 118 are arranged with an interval at which the unbalanced weight 122 and the unbalanced weight 121 provided on the respective weight drive shaft 118 and the weight drive shaft 117 do not contact each other. Yes. In the present embodiment, the weight drive shafts 117 and 118 are longer than the rotation radius R of the unbalanced weights 121 and 122, and the distance L between the rotation shafts is shorter than twice the rotation radius R. Is set. Unbalanced weights 121 and 122 and sleeves 123 and 124 are attached to the weight drive shafts 117 and 118, respectively.

  As shown in FIG. 5, the unbalanced weights 121 and 122 are parts for generating a pushing and pulling force F that reciprocally vibrates the trough 103, and are metal plate-like bodies formed in a quadrant shape in plan view. It is configured. The unbalanced weights 121 and 122 are formed with through holes 121a and 122a through which the weight drive shafts 117 and 118 penetrate on the center side of the quadrant, and are in communication with the through holes 121a and 122a. Thus, two slits 121b and 122b are formed respectively.

  Further, the unbalanced weights 121 and 122 are respectively formed with bolt holes made of female screws in communication with one of the two slits 121b and 122b, and the bolts 121c and 122c are respectively formed in these bolt holes. Is screwed. The inner diameters of the through holes 121a and 122a are elastically changed by the screwing amounts of the bolts 121c and 122c, and the holding force of the weight drive shafts 117 and 118 is increased or decreased.

  Two of these unbalanced weights 121 and 122 are attached to the weight drive shafts 117 and 118 respectively. In this case, the two unbalanced weights 121 attached to the weight drive shaft 117 and the two unbalanced weights 122 attached to the weight drive shaft 118 are in contact with each other in the axial direction of the weight drive shafts 117 and 118. It is not attached in different positions. In the present embodiment, the unbalanced weights 121 and 122 are such that the unbalanced weight 121 and the unbalanced weight 122 are alternately arranged along the axial direction. In this case, two unbalanced weights 121 and 122 are respectively attached to the weight drive shafts 117 and 118 via sleeves 123 and 124 between the unbalanced weights 121 and 122, respectively.

  The sleeves 123 and 124 are metal members for defining the positions of the unbalanced weights 121 and 122 on the weight drive shafts 117 and 118, and are formed in a cylindrical shape through which the weight drive shafts 117 and 118 penetrate. . Each of the sleeves 123 and 124 has a thickness in which the unbalanced weights 121 and the unbalanced weights 122 are alternately arranged along the axial direction, specifically, a thickness larger than the thickness of the unbalanced weights 121 and 122. It is formed with. Therefore, the sleeves 123 and 124 are arranged on the weight drive shafts 117 and 118 so that the sleeve 123 faces the unbalanced weight 122 and the sleeve 124 faces the unbalanced weight 121. Thereby, the assembly process which arrange | positions the unbalanced weight 121 and the unbalanced weight 122 alternately along an axial direction becomes easy.

  The sleeves 123 and 124 are alternately arranged with the unbalanced weights 121 and 122 on the weight drive shafts 117 and 118, and are fixed to the weight drive shafts 117 and 118 with screws. In addition, a scale 125 is formed on the outer peripheral surface of one of the two sleeves 123 and 124 of each of the weight drive shafts 117 and 118. The scale 125 is for specifying the position of the unbalanced weights 121 and 122 in the circumferential direction on the weight drive shafts 117 and 118, and the bar lines extending in the axial direction of the weight drive shafts 117 and 118 are in the circumferential direction. It is formed side by side at equal intervals. The sleeves 123 and 124 in which the scale 125 is formed correspond to the scale sleeve according to the present invention.

  The control device 130 is configured by a microcomputer and controls the operation of the drive motor 112 via a drive circuit (not shown). The control device 130 includes an input device 131 that inputs an instruction from a user of the article transporting feeder 100 and a display device 132 that displays an operating state of the control device 130. Therefore, the control device 130 drives the drive motor 112 to rotate at a rotation number preset by the user or at a rotation number input via the input device 131. The control device 130 is provided separately from the base 101 and the trough 103, but may be fixed on the base 101.

  Further, a stopper 140 is provided on the rear side of the four trough supports 102 on the base 101 where the two trough supports 102 on the front side in the conveyance direction of the article to be conveyed are inclined. The stopper 140 is a component for preventing excessive vibration of the trough 103, and is configured to include an elastic member such as a rubber material that receives upper ends of the two front trough supports 102 that are excessively tilted. .

(Operation of article conveying feeder 100)
Next, the operation of the article transport feeder 100 configured as described above will be described. The article transport feeder 100 is installed at a place where the transport target article needs to be transported in a production line for manufacturing various products to which the transport target article is assembled. In this case, the article conveyance feeder 100 is opened above the hopper 104 so that the articles to be conveyed can be introduced, and a mechanical device that requires the articles to be conveyed (for example, the articles to be conveyed are aligned in front of the discharge port 104b. And a mechanical device (not shown) to be assembled to the product.

  A user who uses the article transport feeder 100 sets the push / pull force F of the hopper 104 in the article transport feeder 100, in other words, sets the output for the hopper 104 to transport the transport target article. The push / pull force F of the hopper 104 is set such that two unbalanced weights 121 for each weight drive shaft 117, 118 in each two unbalanced weights 121, 122 attached to the weight drive shafts 117, 118, respectively. It is defined by the relative positional relationship between the circumferential direction 122 and the rotational speed of the weight drive shafts 117 and 118.

  That is, as shown in FIGS. 6A to 6E, the push / pull force F of the hopper 104 is based on the deviation amount of the center of gravity CP of the unbalanced weights 121 and 122 with respect to the rotation axis of the weight drive shafts 117 and 118 and the weight. It is defined by the number of rotations of the drive shafts 117 and 118. In this case, the center of gravity CP of the unbalanced weights 121 and 122 is the total center of gravity of the two unbalanced weights 121 and 122 provided on the weight drive shafts 117 and 118, respectively. The amount is defined by the relative positional relationship in the circumferential direction between two unbalanced weights 121 and 122, respectively. 6A to 6E, the rotation directions of the weight drive shafts 117 and 118 are indicated by broken-line arrows.

  Therefore, the user adjusts the relative positions in the circumferential direction of the two unbalanced weights 121 and 122 for each of the weight drive shafts 117 and 118. More specifically, the user can use the bolt 121c of one of the two unbalanced weights 121 attached to the weight drive shaft 117 (preferably, the unbalanced weight 122 adjacent to the sleeve 123 on which the scale 125 is formed). To adjust the circumferential position of the other unbalanced weight 121.

  In this case, the user can maximize the pushing / pulling force F of the hopper 104 by matching one unbalanced weight 121 with the circumferential position of the other unbalanced weight 121 (circumferential rotation angle 0 °). In addition, one unbalanced weight 121 is disposed opposite to the other unbalanced weight 121 via the weight drive shaft 117 (circumferential rotation angle 180 °), thereby minimizing the pulling force F of the hopper 104 (theoretical). The top can be “0”). That is, the user sets the rotation angle in the circumferential direction of one unbalanced weight 121 with respect to the other unbalanced weight 121 within a range of 0 ° to 180 ° (or 0 ° to −180 °). The push / pull force F having an arbitrary magnitude can be set in a stepless manner within a range from 104 to 104. Further, the user can accurately position the circumferential position of the unbalanced weight 121 while checking the scale 125 formed on the sleeve 123. In this case, the user can easily position the scale 125 by using a slot 121b formed outside the through hole 121a in the unbalanced weight 121 or by marking the outer peripheral surface of the through hole 121a. Can do.

  After positioning the unbalanced weight 121, the user is adjacent to one of the two unbalanced weights 122 (preferably adjacent to the sleeve 124 on which the scale 125 is formed) attached to the weight drive shaft 118 in the same manner. The bolt 122c of the unbalanced weight 122) is loosened to adjust the circumferential position of the other unbalanced weight 122. In the operation of adjusting the position of the unbalanced weights 121 and 122 in the circumferential direction, the user can change the direction of the centrifugal force CF acting on the center of gravity CP of the unbalanced weights 121 and 122 when the weight drive shafts 117 and 118 are rotationally driven. Are adjusted to coincide with each other every 180 °. In the present embodiment, the user positions the unbalanced weight 121 and the unbalanced weight 122 so as to be symmetrical with respect to the axis direction of the weight drive shafts 117 and 118.

  Accordingly, as shown in FIGS. 6A to 6E, the pushing / pulling force F generated by the trough drive unit 110 is the centrifugal force CF generated in the radial direction of each rotation surface of the unbalanced weights 121 and 122. The centrifugal force CF component in the width direction of the hopper 104, which is the direction connecting the two weight drive shafts 117 and the weight drive shaft 118, is removed, and only the centrifugal force CF component acting in the direction orthogonal to the width direction is formed. . That is, the trough drive unit 110 generates a pushing / pulling force F that linearly reciprocates in the direction toward the hopper 104.

  Next, the user sets the rotation speed of the drive motor 112. Specifically, after the user operates the input device 131 to turn on the power of the control device 130, the user operates the input device 131 to define two rotation speeds of the drive motor 112 for the control device 130. A first frequency and a second frequency to be set are set. In this case, the first frequency is the natural frequency of the entire object (also referred to as “natural frequency”) supported by the four trough supports 102, specifically, the natural frequency of the trough 103 and the trough drive unit 110 as a whole. It is a frequency that is higher than that of the hopper 104 and that vibrates the hopper 104 to such an extent that the articles to be conveyed in the hopper 104 can be conveyed. The second frequency is a frequency that is higher than the natural frequency of the entire object supported by the four trough supports 102 and is lower than the first frequency to convey the object to be conveyed in the hopper 104. The frequency at which the hopper 104 is reciprocally oscillated to the extent that there is not.

  In the present embodiment, the natural frequency of the entire object supported by the four trough supports 102 is 5 to 8 Hz, and the first frequency is 20 Hz to 35 Hz. Therefore, the user sets the first frequency between 20 Hz and 35 Hz (for example, 30 Hz), and sets the second frequency between 9 Hz and less than 20 Hz (for example, 12 Hz).

  Next, the user starts the conveyance of the articles to be conveyed by the article conveyance feeder 100. Specifically, after starting the supply of articles to be supplied and conveyed from the storage container to the hopper 104, the user operates the input device 131 to instruct the control device 130 to drive the drive motor 112 to rotate. To do. In response to this instruction, the control device 130 causes the drive motor 112 to start rotating at a preset rotation speed, specifically, at a rotation speed corresponding to the first frequency.

  As a result, the trough drive unit 110 has a pulling force F according to the circumferential position of the unbalanced weights 121 and 122 when the weight drive shaft 117 and the weight drive shaft 118 are rotationally driven in the opposite directions at the same rotational speed. And the trough 103 is reciprocally vibrated by the same pulling force F. Accordingly, in the article transport feeder 100, the trough 103 reciprocally vibrates due to the pulling force F by the trough drive unit 110, and the transport target article in the hopper 104 is moved to the discharge port 104b side.

  On the other hand, the user operates the input device 131 to instruct the control device 130 to perform the standby operation of the drive motor 112 when the conveyance of the conveyance target article by the article conveyance feeder 100 is temporarily interrupted. In response to this instruction, the control device 130 drives the drive motor 112 to rotate at a preset rotational speed, specifically, at a rotational speed corresponding to the second frequency.

  As a result, the trough drive unit 110 generates a push / pull force F corresponding to the number of rotations corresponding to the second frequency, that is, a push / pull force F that is insufficient for transporting the articles to be transported in the hopper 104 and the push / pull force. The trough 103 is reciprocated by F. Therefore, the article conveyance feeder 100 is in a standby state in which the trough 103 is reciprocally oscillated while the conveyance target article is held in the hopper 104 without being moved.

  Then, when the user resumes the conveyance of the articles to be conveyed by the article conveyance feeder 100, the user operates the input device 131 to instruct the controller 130 to perform the conveyance operation of the drive motor 112. In response to this instruction, the control device 130 drives the drive motor 112 to rotate at a preset rotation speed, specifically, at a rotation speed corresponding to the first frequency. As a result, in the article transport feeder 100, the trough 103 reciprocally vibrates due to the pushing and pulling force F corresponding to the first frequency, and the articles to be transported in the hopper 104 are moved toward the discharge port 104b. In this case, the article transporting feeder 100 does not pass the natural frequency (5 to 8 Hz in this embodiment) of the entire object supported by the four trough supports 102 in the process of increasing the reciprocating vibration of the trough 104. Can be smoothly reciprocated by the pushing and pulling force F corresponding to the first frequency without resonating.

  When the user interrupts the conveyance of the articles to be conveyed by the article conveyance feeder 100, the user operates the input device 131 to instruct the control device 130 to stop the operation of the drive motor 112. In response to this instruction, control device 130 stops the rotational drive of drive motor 112. Then, the user can completely stop the operation of the article transport feeder 100 by operating the input device 131 and turning off the power of the control device 130 to finish the transport operation of the transport target article. In addition, the user changes the magnitude of the pulling force F by changing the circumferential positions of the weight drive shafts 117 and 118 of the unbalanced weights 121 and 122 according to the conveyance specification of the object to be conveyed. The conveyance of the article can be continued or resumed.

  As can be understood from the above description of operation, according to the above embodiment, the article conveyance feeder 100 is configured such that the distance L between the rotation axes of the two weight drive shafts 117 and 118 is greater than the rotation radius R of the unbalanced weights 121 and 122. The length is set to be longer and shorter than twice the same radius R. That is, the article transporting feeder 100 includes an unbalanced weight 121 held on one weight drive shaft 117 and an unbalanced weight 122 held on the other weight drive shaft 118 of the two weight drive shafts 117 and 118. The two weight drive shafts 117 and 118 are arranged close to each other so as to be overlapped with each other in the axial direction of the weight drive shafts 117 and 118 by entering inside the portion. Thereby, since the article conveyance feeder 100 can set the distance L between the rotating shafts of the two weight drive shafts 117 and 118 to be shorter, the apparatus configuration can be made compact.

  Furthermore, in carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. In addition, in each modification demonstrated below, the same code | symbol is attached | subjected to the component similar to the said embodiment, and description is abbreviate | omitted suitably.

  For example, in the above embodiment, two unbalanced weights 121 and 122 are provided on the two weight drive shafts 117 and 118, respectively. However, at least one unbalanced weight 121, 122 may be provided on each of the two weight drive shafts 117, 118.

  In the above embodiment, the sleeves 123 and 124 are used to position the unbalanced weights 121 and 122 in the axial direction of the weight drive shafts 117 and 118. However, it is natural that the unbalanced weights 121 and 122 can position the weight drive shafts 117 and 118 in the axial direction even if the sleeves 123 and 124 are omitted.

  In the above-described embodiment, the scales 125 are formed on the sleeves 123 and 124 to position the unbalanced weights 121 and 122 in the circumferential direction of the weight drive shafts 117 and 118. However, it is natural that the unbalanced weights 121 and 122 can be positioned in the circumferential direction of the weight drive shafts 117 and 118 even if the scale 125 is omitted.

  In the above-described embodiment, the unbalanced weights 121 and 122 are configured such that the circumferential positions of the weight drive shafts 117 and 118 can be changed by loosening the bolts 121c and 122c. However, the unbalanced weights 121 and 122 cannot change the circumferential position of the weight drive shafts 117 and 118, that is, can be fixedly provided to the weight drive shafts 117 and 118.

  In the above embodiment, the trough drive unit 110 is configured such that the rotational axes of the two weight drive shafts 117 and 118 are parallel to the extension line TL of the plate surface of the four trough support bodies 102. That is, the trough drive unit 110 is provided so as to be inclined in a direction in which the pushing / pulling force F is directed toward the center of gravity SP. However, the trough drive unit 110 only needs to be provided in a direction that generates the pushing / pulling force F along the transport direction so that the trough 103 can reciprocate in the transport direction of the article to be transported. Therefore, the trough drive unit 110 can be provided at an arbitrary rotation angle around the extension line TL, for example.

  Moreover, the trough drive unit 110 can also provide the two weight drive shafts 117 and 118 in the direction extended in parallel with a horizontal direction, respectively, as shown, for example in FIG. In this case, the unbalanced weights 121 and 122 respectively provided on the two weight drive shafts 117 and 118 are used when the weight drive shafts 117 and 118 are rotationally driven, as shown in FIGS. The direction of the centrifugal force CF acting on each center of gravity CP of the unbalanced weights 121 and 122 is the direction that coincides with each other every 180 ° and the centrifugal force CF that coincides with each other. Is adjusted toward the center of gravity SP.

  In FIG. 7, the drive motor 112 and the unbalanced weights 117 and 118 in the trough drive unit 110 are indicated by broken lines. 8A to 8E show the trough drive unit 110 in a horizontal state. Each centrifugal force CF in FIG. 8A is directed toward the center of gravity SP, and each centrifugal force CF in FIG. Indicates a state of being directed to the opposite side of the center of gravity SP.

  According to this, the article transporting feeder 100 can change the acting direction of the pushing / pulling force F generated by the trough drive unit 110 according to the circumferential mounting position of the unbalanced weights 121 and 122. That is, the article transporting feeder 100 can adjust the direction of action of the pushing and pulling force F generated by the trough driving unit 100 with respect to the center of gravity SP, so that the vibration efficiency of the trough 103 can be improved and the article conveying feeder 100 is placed on the trough 103. It is possible to flexibly cope with the change of the transported article object to be performed.

  In the above embodiment, the control device 130 is configured to selectively drive the drive motor 112 at two rotation speeds corresponding to the first frequency and the second frequency, respectively. However, the control device 130 may be configured to selectively rotate the drive motor 112 at only one rotation speed or at three or more rotation speeds.

  Further, in the above embodiment, the article transport feeder 100 is configured to drive the two weight drive shafts 117 and 118 by the single drive motor 112. However, the article transporting feeder 100 may be configured to drive the two weight drive shafts 117 and 118 by one drive motor 112, that is, two drive motors 112, respectively.

  In the above-described embodiment, the article transporting feeder 100 is configured by a so-called single vibration system in which the trough 103 is directly supported on the base 101 via the trough support 102. That is, the article transport feeder 100 in the above embodiment does not vibrate the trough 103 due to the resonance phenomenon, but directly reciprocates by the pulling force F generated by the trough drive unit 110, so the amount of articles to be transported in the hopper 104 It is particularly suitable for a hopper device in which the change is made. However, the article conveying feeder according to the present invention is a so-called two-vibration-type article conveying apparatus that supports two mass systems in a floating manner on a base and resonates these two mass systems to convey an object to be conveyed. Of course, it is also applicable.

F ... push / pull force, FP ... push / push force generation center position, SP ... the center of gravity of the entire object supported by the trough support, FL ... push-pull extension line, TL ... extension line of the trough support plate surface, L ... The distance between the two weight drive shafts, R: the radius of rotation of the unbalanced weight, CP: the center of gravity of each unbalanced weight, CF : the centrifugal force acting on each unbalanced weight that is driven to rotate,
100 ... article conveying feeder,
DESCRIPTION OF SYMBOLS 101 ... Base, 102 ... Trough support body, 102a ... Bending edge, 103 ... Trough, 104 ... Hopper, 104a ... Input port, 104b ... Discharge port, 105 ... Hopper stand,
DESCRIPTION OF SYMBOLS 110 ... Trough drive conveyance unit, 111 ... Case, 112 ... Drive motor, 112a ... Drive shaft, 113 ... Drive side disk body, 114 ... Annular transmission body, 115, 116 ... Driven side disk body, 117, 118 ... Weight drive shaft 121, 122 ... unbalanced weight, 121a, 122a ... through hole, 121b, 122b ... slot, 121c, 122c ... bolt, 123, 124 ... sleeve, 125 ... scale,
130 ... Control device, 131 ... Input device, 132 ... Display device,
140: Stopper.

Claims (4)

A trough for placing articles to be transported;
A trough drive unit for reciprocating vibration of the trough;
And a trough support that supports the trough in a state where the trough can be reciprocally displaced in a conveyance direction of the conveyance target article on a base, and is an article conveyance feeder that conveys the conveyance target article from one side to the other. And
The trough drive unit is
Two weight drive shafts arranged parallel to each other;
A drive motor that drives the two weight drive shafts to rotate reversely to each other;
Each of the weight drive shafts has a center of gravity at a position deviating from the rotational axis of each weight drive shaft, and the respective centrifugal forces acting on the center of gravity when the weight drive shafts are driven to rotate coincide with each other every 180 °. A pair of unbalanced weights respectively provided on the weight drive shaft,
The pair of unbalanced weights is
One and two of the unbalanced weights provided on the weight drive shaft to the two provided the unbalanced weights and the other the weight driving shaft are respectively provided on different axial position to each other,
The two weight drive shafts are
The distance between the rotation axes is set to be longer than the rotation radius of the unbalanced weight and shorter than twice the rotation radius, and each of the weights facing each of the two unbalanced weights. A cylindrical sleeve is provided on each drive shaft,
The sleeve is
An article transporting feeder, wherein the article transporting feeder is formed to be thicker than each unbalanced weight . A trough for placing articles to be transported;
A trough drive unit for reciprocating vibration of the trough;
And a trough support that supports the trough in a state where the trough can be reciprocally displaced in a conveyance direction of the conveyance target article on a base, and is an article conveyance feeder that conveys the conveyance target article from one side to the other. And
The trough drive unit is
Two weight drive shafts arranged parallel to each other;
A drive motor that drives the two weight drive shafts to rotate reversely to each other;
Each of the weight drive shafts has a center of gravity at a position deviating from the rotational axis of each weight drive shaft, and the respective centrifugal forces acting on the center of gravity when the weight drive shafts are driven to rotate coincide with each other every 180 °. A pair of unbalanced weights respectively provided on the weight drive shaft;
A control device for controlling the rotational drive of the drive motor;
The pair of unbalanced weights is
The unbalanced weight provided on one of the weight drive shafts and the unbalanced weight provided on the other weight drive shaft are provided at different axial positions.
The two weight drive shafts are
The distance between the rotation axes is set to be longer than the rotation radius of the unbalanced weight and shorter than twice the rotation radius;
The controller is
The first frequency that is higher than the natural frequency of the entire object supported by the trough support plate and that is higher than the natural frequency and capable of conveying the article to be conveyed, and lower than the first frequency. article transport feeder characterized that you control the operation of the drive motor so as to reciprocally vibrate selectively the trough at least two frequencies of the second frequency can not be transported to the target article. The article conveying feeder according to claim 1,
The pair of unbalanced weights is
The two unbalanced weights provided on one of the weight drive shafts and the two unbalanced weights provided on the other weight drive shaft are respectively provided at different axial positions.
The two weight drive shafts are
A cylindrical sleeve is provided on each of the weight drive shafts respectively facing the two unbalanced weights,
The sleeve is
Article transport feeder, wherein Rukoto said formed of a thicker than the thickness of the unbalanced weights. In the article conveyance feeder according to claim 1 or 3,
Each of the unbalanced weights can be changed in mounting position in the circumferential direction with respect to each of the weight drive shafts.
The sleeve is
Article transport feeder, wherein Rukoto the the outer periphery along the circumferential direction of the weight body driving shaft have been given the scale.

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