JP7324990B2 - vibrating conveyor - Google Patents

Description

The present invention relates to a vibrating conveyor that conveys workpieces by reciprocating a trough.

As a conventional vibrating conveyor, there is one described in Patent Document 1, for example. In this vibrating conveyor, the power from the rotary motor is transmitted to the trough through the parallel link to reciprocate the trough and convey the work on the trough. The rotational speed of the rotary motor is controlled so that when moving the trough in the work conveying direction, the trough is moved at a speed slower than the speed at which the trough is moved in the direction opposite to the work conveying direction.

By reciprocating the trough as described above, the work placed on the trough can be moved so as to slide on the trough while being accelerated in the transport direction.

In Patent Document 1, the configuration for controlling the rotation speed of the motor requires a dedicated driver/controller separate from the motor, which not only leads to an increase in cost and installation space, but also generates a control load.

Japanese Patent Application Laid-Open No. 2005-272132

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vibrating conveyor capable of suppressing increases in cost and installation space by eliminating the need for a driver/controller for controlling the rotation of a motor.

The present invention comprises a reciprocating trough for conveying a workpiece, a revolving member that revolves at a constant speed by driving force from a driving source, and a revolving member provided between the revolving member and the trough. a converting mechanism for converting motion into linear reciprocating motion of the trough, wherein the revolving member revolves at a constant speed, the converting mechanism has one end connected to the revolving member, and one end connected to the revolving member. a rocking member configured to be rockable about an axis substantially parallel to the axis passing through the center of rotation of the rotating member at an intermediate portion between and the other end; a connecting member having the other end connected to the trough, wherein the swinging member has a distance between one end of the swinging member and the shaft and the other end of the swinging member. The vibrating conveyor is characterized in that it is movable so that the ratio of the distance between the portion and the shaft changes every moment as the revolving member revolves.

As described above, it moves so that the ratio of the distance between one end of the swinging member and the shaft to the distance between the other end of the swinging member and the shaft changes every moment as the orbiting member rotates. By doing so, the acceleration in the phase in which the trough reverses from forward to backward can be made larger than the acceleration in the phase in which the trough reverses from backward to forward. Further, the connecting member is pushed and pulled in conjunction with the swinging motion of the swinging member around the shaft while moving relative to the shaft, thereby converting the swinging motion of the swinging member into linear reciprocating motion of the trough. The trough can be reciprocated. That is, the present invention provides a conversion mechanism that converts the orbiting motion of the orbiting member into the linear reciprocating motion of the trough, as described above, without controlling the orbiting of the orbiting member using a driving source such as a servomotor as in the conventional art. can be mechanically realized to allow the rotating member to rotate at a constant speed. This not only eliminates the need for an expensive servomotor as a drive source, but also eliminates the need for a driver/controller for circular control, as well as eliminating the need for a drive circuit and a control circuit. Moreover, since it is a mechanical structure, when a failure occurs, it is easy to investigate the cause of the failure and repair it on site.

Further, the swinging member may be provided with a sliding portion that is capable of swinging while holding the shaft and that slides in the longitudinal direction while holding the shaft.

As described above, by sliding the oscillating member by means of the slide portion, the ratio of the distance between one end of the oscillating member and the shaft to the distance between the other end of the oscillating member and the shaft changes. is carried out smoothly.

Further, the slide portion may be configured by a long hole formed in the swing member.

As described above, the sliding portion can be formed simply by forming the long hole in the swinging member, which facilitates the manufacture of the swinging member.

Further, when the driving force transmitted to the trough via the connecting member is reversed from one direction to the other direction in relation to the linear reciprocating motion, the swinging member reverses from the other direction to the other direction. The configuration may be such that the movement is performed so that .

According to the above configuration, the acceleration acting on the trough when reversing from another direction to one direction can be made larger than the acceleration acting on the trough when reversing from one direction to the other direction. This can be achieved with a mechanical configuration.

ADVANTAGE OF THE INVENTION According to this invention, the vibration conveyor which can suppress the increase in a cost and an installation space can be provided by making the driver controller which controls rotation of a motor unnecessary.

FIG. 3 is a plan view extracting and showing a conversion mechanism of the vibration conveyor according to the first embodiment of the present invention; It is a side view of the same vibration conveyor. (a), (b) is explanatory drawing which simplifies the conversion mechanism of the vibration conveyor and shows the movement. (a), (b) is explanatory drawing which simplifies the conversion mechanism of the vibration conveyor and shows the movement. It is a side view of the vibration conveyor which concerns on 2nd Embodiment of this invention. It is a side view of the vibration conveyor based on 3rd Embodiment of this invention. It is a side view of the vibration conveyor based on 4th Embodiment of this invention. FIG. 11 is a plan view showing an extracted conversion mechanism of a vibration conveyor according to a fifth embodiment of the present invention;

The vibrating conveyor of the present invention will be explained based on the drawings.
<First embodiment>

FIG. 2 shows the vibration conveyor 1 of the first embodiment according to this embodiment. In addition, in FIG. 2, the left-right direction (longitudinal direction) of the drawing is defined as the front-rear direction, and the direction penetrating through the paper surface is defined as the left-right direction. The vibration conveyor 1 includes a trough 3 supported on the ground G via a support portion 2 so as to be able to reciprocate in the front-rear direction, and a driving portion 4 for reciprocating the trough 3 .

Although the support part 2 supports the front and rear ends of the trough 3 in FIG. 2, the support parts 2 are also provided at both left and right ends, and support the trough 3 at a total of four points. Each support part 2 is attached to a fixed block 21 fixed to the ground G and a support member 22 extending upward from the fixed block 21 so as to be rotatable about a horizontal axis X, and a wheel that abuts and supports the lower surface of the trough 3 . 23 and.

The trough 3 is elongated in the front-rear direction, and includes a bottom wall 31, left and right wall portions 32, 32 extending upward from both left and right ends of the bottom wall 31 (only one wall portion is shown in FIG. 2), It is an upper open type with a substantially U shape when viewed in the front and back direction.

The driving part 4 is attached to a fixed part 5 fixed to the ground G. The fixing portion 5 includes a rectangular plate-like plate member 51 that is long in the front-rear direction and supports the driving portion 4, and four block-like leg portions 52, 52, 52, and 52 that support the four corners of the plate member 51 (see FIG. 2, only one side in the left-right direction is shown).

Specifically, the drive unit 4 receives a rotational force from an electric motor 41 as a drive source driven by the power source 6 and a drive shaft 41A of the electric motor 41, and revolves around the drive shaft 41A at a constant speed. A rotary member 42 as an oval plate-shaped rotating member pivotally supported by the drive shaft 41A as shown in FIG. and a conversion mechanism 43 that converts the circular motion of the trough 3 into a linear reciprocating motion of the trough 3 . As the electric motor 41, for example, an inexpensive general-purpose motor such as an induction motor, or a motor combining these with a speed reducer such as a gear mechanism can be used. When a speed reducer is used, it is possible to obtain an appropriate number of revolutions to meet the specifications of the vibrating conveyor and easily obtain the torque required to drive the vibrating conveyor.

The electric motor 41 includes a motor body 41B and a drive shaft 41A projecting upward from the motor body 41B. The motor body 41B is fixed with its upper end surface in contact with the lower surface of the plate member 51, and the drive shaft 41A penetrates the plate member 51 and protrudes upward from the upper end surface of the plate member 51. A rotary member 42 is attached to the upper end portion of the projecting drive shaft 41A so as to be integrally rotatable.

The conversion mechanism 43 is arranged between the upper surface of the plate member 51 and the lower surface of the bottom wall 31 of the trough 3 . Specifically, one end 431A of the conversion mechanism 43 is pivotally connected to the rotating member 42 via a pin P1, and the center of rotation of the rotating member 42 is positioned at an intermediate portion 431C between the one end 431A and the other end 431B. A rocking member 431 configured to be rockable around an axis 8 (see FIG. 1) substantially parallel to the drive shaft 41A through which it passes, and a pin P2 at the other end 431B of the rocking member 431 and one end 432A. and a connecting member 432 pivotally connected via a pin P3 to a rectangular plate-like fixing plate 7 whose other end 432B is fixed to the bottom wall 31 of the trough 3. there is Note that the rotating member 42 and the conversion mechanism 43 constitute a link mechanism that connects the electric motor (driving source) 41 and the trough 3 . The trough 3 is reciprocated by converting the rotational force from the rotating member 42 rotating at a constant speed into linear reciprocating motion by the conversion mechanism 43 . This not only eliminates the need for an expensive servomotor as a drive source, but also eliminates the need for a driver/controller for circular control, as well as eliminating the need for a drive circuit and a control circuit. Moreover, since it is a mechanical structure, when a failure occurs, it is easy to investigate the cause of the failure and repair it on site.

The shaft 8 is composed of a shaft body 82 projecting upward from the upper end of a rectangular base member 81 fixed to the upper surface of the plate member 51, and a roller 83 rotatably fitted around the shaft body 82. It is

The swinging member 431 is made of a substantially rectangular plate-like member with rounded corners at both ends, and is capable of swinging while holding the roller 83 constituting the shaft 8 and holding the roller 83 . It has a slide portion 431G that slides in the longitudinal direction while being held. The sliding portion 431G is an elongated hole formed in the swinging member 431, and allows the swinging member 431 to move with respect to the shaft 8, so that the one longitudinal end portion 431A of the swinging member 431 and the shaft 8 are separated. , and the ratio between the other longitudinal end portion 431B of the swing member 431 and the shaft 8 change every moment as the rotating member 42 rotates. In this way, by sliding the swinging member 431 with the sliding portion 431G, the distance between the one longitudinal end portion 431A of the swinging member 431 and the shaft 8 and the distance between the other end portion 431B of the swinging member 431 and the shaft 8 are changed. Changes in the distance and ratio between are carried out smoothly. In addition, since the sliding portion 431G can be configured only by forming an elongated hole in the swinging member 431, the swinging member 431 can be manufactured easily.

In addition, the swinging member 431 is more flexible than when the driving force transmitted to the trough 3 via the connecting member 432 is reversed from one direction related to the linear reciprocating motion of the trough 3 to the other direction (direction opposite to the conveying direction). , so as to move larger when reversing from the other direction to one direction (conveyance direction). Therefore, the acceleration acting on the trough when reversing from another direction to one direction is greater than the acceleration acting on the trough when reversing from one direction to the other direction. Moreover, this movement can be realized with a mechanical configuration.

The connecting member 432 is a substantially rectangular plate-shaped member having rounded corners at both ends, and is slightly smaller in width than the swinging member 431 and slightly longer in length than the swinging member 431 . but not limited to.

A pair of left and right rotating rollers 9, 9 are arranged in the front-rear direction at the left and right ends of the fixed plate 7 so that the fixed plate 7 moves linearly in the front-rear direction. Each rotating roller 9 is rotatably fitted around a shaft 10 fixed to the ground G. As shown in FIG.

Next, the movement of the conversion mechanism 43 when conveying the work by the vibration conveyor 1 will be described based on the schematic diagrams shown in FIGS.

First, referring to FIGS. 3(a), (b) and FIGS. 4(a), (b), the first joint (reference joint) 11 is the part where the electric motor 41 is installed (attached). 2 corresponds to the plate member 51 of FIG. The second joint 12 is a member forming a rotating pair with the drive shaft 41A of the electric motor 41, and corresponds to the rotating member 42 connected to the drive shaft 41A in FIG. The third joint 13 is a member forming a rotating pair with the second joint 12, and corresponds to the swinging member 431 connected to the rotating member 42 of FIG. 1 by a pin P1. The fourth joint 14 is a member forming a sliding pair with the third joint 13, and is a member (for example, a cylindrical member) that allows the swinging member 431 to swing and slide. It is attached so that it can only swing. Therefore, the fourth joint 14 has the same function as the elongated hole (slide portion 431G) formed in the rocking member 431 of FIG. The fifth joint 15 is a member forming a turning pair with the third joint 13, and corresponds to the connecting member 432 in FIG. The sixth joint 16 is a member forming a turning pair with the fifth joint 15, and corresponds to the fixing plate 7 in FIG. The third joint 13 and the fifth joint 15 are connected by a pin P2, and the sixth joint 16 and the fifth joint 15 are connected by a pin P3. Further, on the first joint 11, a drive shaft 41A of the electric motor 41, a swinging fulcrum 17 to be described later, and a pin P3 that is a connecting portion between the sixth joint 16 and the fifth joint 15 are arranged. .

When the electric motor 41 is driven, the second joint 12 rotates counterclockwise as indicated by an arrow in plan view as shown in FIG. 3(a). This rotation of the second joint 12 causes the third joint 13 to swing and move toward the second joint 12 (to the left). The movement of the third joint 13 pulls the fifth joint 15 to pull the sixth joint 16 linearly along the first joint 11 . This causes the trough 3 to move to the left (see FIGS. 3(a) to 3(b)). Further, when the second joint 12 rotates, as shown in FIG. 4A, the second joint 12 pushes and moves the third joint 13 while swinging in the opposite direction. This causes the trough 3 to move from left to right (see FIGS. 4(a) to 4(b)).

In the vibrating conveyor 1 having the above configuration, the conversion rate of the amount of movement between the input and the output (the movement of the output with respect to the input amount ratio) changes. To explain this point, FIG. 3(b) shows a phase in which the backward movement is reversed to the forward movement. (output) movement is small. This is because the distance L2 from the swing fulcrum (corresponding to the shaft body 82 in FIG. 1) 17 of the third joint 13 to the pin P2, which is the connecting portion between the third joint 13 and the fifth joint 15, is equal to the second joint. This is because it is shorter than the distance L1 from the pin P1, which is the connecting portion between 12 and the third joint 13, to the swing fulcrum 17 of the third joint 13 (due to the principle of leverage).

On the other hand, FIG. 4B shows a phase in which the forward movement is reversed to the backward movement, and the trough side end of the third joint 13 (output ) is large. This is because the distance L2 from the rocking fulcrum 17 of the third joint 13 to the pin P2, which is the joint between the third joint 13 and the fifth joint 15, is equal to the joint between the second joint 12 and the third joint 13. (due to the principle of leverage). Thus, the conversion rate of the amount of motion between the input and the output results from the change in the leverage due to the change in the position of the swing fulcrum 17 with respect to the third joint 13 .

Therefore, when the trough 3 is reversed from forward to reverse, the reversal from forward to reverse is performed quickly because of the large movement of the output relative to the input. That is, the acceleration (deceleration) at the time of reversal is large. On the other hand, when the trough 3 is reversed from reverse to forward, the reversal from reverse to forward is performed slowly because the movement of the output with respect to the input is small. That is, the acceleration (deceleration) at the time of reversal is small. The maximum value of the acceleration (deceleration) of the trough 3 when reversing from forward to backward is greater than the static friction coefficient between the work and the trough 3 x the value of gravitational acceleration. A slip occurs between them. The workpiece moves forward relative to the trough 3 because it is a slip that occurs when the forward movement is reversed to the backward movement. As described above, the workpiece that has slipped during the reversal phase from forward movement to backward movement continues to move forward relative to the trough 3 while being decelerated by the dynamic friction force. On the other hand, the trough 3 undergoes a reversal phase from backward movement to forward movement after backward movement, and accelerates forward movement. Before long, the speed of the trough 3 and the speed of the work match, and a static frictional force acts. When the trough 3 reverses from backward to forward, the acceleration is smaller than when it reverses from forward to reverse, so there is no slippage between the trough 3 and the workpiece, and they are united under static friction. exercise. As the trough repeats such movements, the work is conveyed forward.

The distance between the drive shaft 41A of the electric motor 41 and the swing fulcrum (corresponding to the shaft body 82 in FIG. 1) 17 of the third joint 13 may be adjustable. As a result, the motion pattern (magnitude of acceleration) of the trough 3 can be changed, and the motion of the trough can be optimally adjusted according to the characteristics of the workpiece.
<Second embodiment>

In the first embodiment, the plate member 51 that supports the drive section 4 is fixed to the leg section 52 installed on the ground G, so that the reaction force when the vibration conveyor 1 is driven is transmitted to the ground. However, it can have a simpler configuration. On the other hand, in the second embodiment, the reaction force when the vibration conveyor 1 is driven is made difficult to be transmitted to the ground. Specifically, as shown in FIG. 5, it may be composed of a plurality of (specifically, four pieces arranged at the four corners of the plate member 51) supporting members 18 that abut and support the plate member 51 from below. . Each support 18 is attached to a fixed block 181 fixed to the ground G and a support member 182 extending above the fixed block 181 so as to be rotatable around the horizontal axis X1. 183 and . A counterweight 19 is attached to the lower surface of the plate member 51 .

By supporting the plate member 51 in this way, the plate member 51 can freely move linearly with respect to the ground, and receives a reaction force to move in the direction opposite to the movement of the trough 3. However, the reaction force transmitted from the plate member 51 to the ground is reduced. Since the amount of movement of the plate member 51 depends on the weight ratio with the trough 3 , a counterweight 19 may be installed to balance the weight of the trough 3 . In addition, while attaching|subjecting the same code|symbol to the part of the same structure as 1st Embodiment, description is abbreviate|omitted.
<Third Embodiment>

As shown in FIG. 6, the vibration conveyor 1 shown in the second embodiment may be provided with a spring (here, it is a coil spring, but it may be a spiral spring, a plate spring, etc.) 20 as an elastic body. good. Specifically, the rear end of the fixed block 21 positioned on the front side fixed to the ground G and the front end of the plate member 51 are connected by a spring (coil spring) 20 extending in the front-rear direction (horizontal direction). The front end of the fixing block 21 positioned on the fixed rear side and the rear end of the plate member 51 are connected by a spring (coil spring) 20 along the front-rear direction (horizontal direction). By arranging the spring 20 in this way, the plate member 51 has a restoring force to a predetermined central position, and when the vibration conveyor 1 is driven, the plate member 51 and the trough 3 are centered on the predetermined position. reciprocating motion. In addition, while attaching|subjecting the same code|symbol to the part of 2nd Embodiment and an identical configuration, description is abbreviate|omitted.
<Fourth Embodiment>

In the third embodiment, the spring 20 is arranged horizontally. It may be configured from a member formed in the arc-shaped concave portion 51A. In this case, as in the second embodiment, the plate member 51 has a restoring force to a predetermined central position, and when the vibration conveyor 1 is driven, the plate member 51 and the trough 3 are centered on the predetermined position. reciprocating motion. In addition, while attaching|subjecting the same code|symbol to the part of 3rd Embodiment and an identical configuration, description is abbreviate|omitted.
<Fifth Embodiment>

In the first embodiment, the swinging of the swinging member 431 is performed by the shaft 8, and the sliding of the swinging member 431 is performed by the elongated hole 431G of the swinging member 431 through which the shaft 8 penetrates. Then, the rocking and sliding of the rocking member 431 may be performed by the holder 24 rotatably attached to the base member 81 fixed to the plate member 51 . The holding body 24 is arranged so as to sandwich the swinging member 431 from both sides in the short direction orthogonal to the longitudinal direction of the swinging member 431 at an intermediate portion 431 between the one end portion 431A and the other end portion 432B of the swinging member 431. Two rollers 241, 241, and shafts 241A, 241A for rotatably supporting the rollers 241, 241 are supported at both ends and a holding member 242 is rotatably attached to a shaft 82 fixed to a base member 81. and have. Therefore, when the holding member 242 rotates around the shaft 82, the swinging member 431 swings, and the swinging member 431 is guided on the holding member 242 by the rotation of the rollers 241, 241 in the straight line direction of the arrow. By sliding, the rotary motion of the rotating member 42 can be converted into the linear reciprocating motion of the trough 3 . In this way, by sliding the swinging member 431 on the holding member 242, the distance between the one end 431A in the longitudinal direction of the swinging member 431 and the shaft 82 and the distance between the other end 431B of the swinging member 431 and the shaft The ratio change with the distance between 82 is performed smoothly. In addition, while attaching|subjecting the same code|symbol to the part of the same structure as 1st Embodiment, description is abbreviate|omitted.

It should be noted that the vibrating conveyor according to the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

For example, the rotary member 42 may be configured in a polygonal shape such as a triangular shape or a square shape, or in a disk shape.

Although the connecting member 432 is connected to the trough 3 via the fixing plate 7 in the above embodiment, the connecting member 432 may be directly connected to the trough 3 .

Further, in the above-described embodiment, the swinging member 431 having the long hole 431A and the fourth joint 14 forming a sliding pair with the third joint 13 corresponding to the swinging member 431 are formed of cylindrical bodies. A long groove recessed upward may be formed in the rocking member 431, and the roller 83 (a shaft may be substituted for the roller) may be engaged with the long groove.

Further, in the above embodiment, the drive shaft 41A is arranged in the vertical direction, but the drive shaft 41A may be arranged in the horizontal (horizontal) direction.

In the above embodiment, the rotating member 42 is provided such that one end of the swinging member 431 moves on a perfect circle. good too. The rotating member 42 and the elliptical member correspond to the rotating member.

DESCRIPTION OF SYMBOLS 1... Vibration conveyor, 2... Support part, 3... Trough, 4... Drive part, 5... Fixed part, 6... Power source, 7... Fixed plate, 8... Shaft, 9... Rotating roller, 10... Shaft, 11... First Joint (reference joint), 12...Second joint, 13...Third joint, 14...Fourth joint, 15...Fifth joint, 16...Sixth joint, 17...Swing fulcrum, 18...Support body, 19...Counter Weight 20 Spring 21 Fixed block 22 Supporting member 23 Wheel 24 Holder 31 Bottom wall 32 Left and right walls 41 Electric motor (driving source) 41A Drive shaft ( Rotating shaft), 41B Motor main body 42 Rotating member (surrounding member) 43 Converting mechanism 51 Plate member 51A Concave portion 52 Leg portion 81 Base member 82 Shaft main body 83 Roller , 84... shaft, 181... fixed block, 182... support member, 183... wheel, 241... roller, 242... holding member, 431... rocking member, 431A... one end, 431B... other end, 431C... middle part, 431G...slide part (long hole), 432...connecting member, 432A...one end, 432B...other end, G...ground, L1, L2...distance, P1, P2, P3...pin, X, X1...horizontal axis

Claims (4)

a reciprocating trough for conveying a workpiece; a revolving member that revolves by driving force from a driving source; A vibration conveyor comprising a conversion mechanism that converts to motion,
The revolving member revolves at a constant speed,
One end of the conversion mechanism is connected to the encircling member, and the conversion mechanism is configured to be swingable at an intermediate portion between one end and the other end about an axis substantially parallel to an axis passing through the center of rotation of the encircling member. a swinging member; and a connecting member having one end connected to the other end of the swinging member and the other end connected to the trough,
The oscillating member has a ratio of a distance between one end of the oscillating member and the shaft to a distance between the other end of the oscillating member and the shaft. A vibrating conveyor characterized in that it is configured to be movable so as to change from moment to moment. 2. The vibration conveyor according to claim 1, wherein the swinging member is capable of swinging while holding the shaft, and has a sliding portion that slides in the longitudinal direction while holding the shaft. 3. The vibrating conveyor according to claim 2, wherein said slide portion is formed by an elongated hole formed in said swinging member. The oscillating member is configured such that the driving force transmitted to the trough via the connecting member is more effective when reversing from one direction to the other than when reversing from one direction to the other direction related to the linear reciprocating motion. 4. The vibrating conveyor according to any one of claims 1 to 3, characterized in that said movement is such that .