JP2021109721A - Vibration conveyance device - Google Patents

Abstract

To provide a vibration conveyance device having a vibration-proof structure in which pitching can be easily adjusted without causing a significant cost increase or structural complexity.SOLUTION: A vibration conveyance device X for conveying a conveyance object W on a linear conveyance surface by vibration includes: a first mass body 1 having a linear conveyance surface; a second mass body 2 vibrating in the opposite phase to the first mass body 1; a first elastic body 3 connecting the first mass body 1 and the second mass body 2; and a second elastic body 5 connecting a base 4 and the first elastic body 3. With respect to an elastic coefficient in a horizontal direction of the second elastic body 5 and an elastic coefficient in a vertical direction of the second elastic body 5, at least a vertical elastic coefficient of the second elastic body 5 can be independently changed.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vibration transfer device capable of transporting an object to be transported in a predetermined direction.

Conventionally, there has been known a vibration transport device capable of transporting an object to be transported such as a work to a predetermined transport destination along a transport path by vibration. The vibration transfer device is a plate-shaped first elastic body that connects a movable portion (first mass body) having a transport path, a second mass body that functions as a fixed portion, and the first mass body and the second mass body. It has a (drive spring) and is configured to be able to transport an object to be transported downstream in the transport direction by vibrating the transport path of the movable portion (first mass body) in the horizontal direction. Further, the vibration transfer device is configured to support a structure having a first mass body, a second mass body and a first elastic body from the ground with a second elastic body (vibration-proof spring).

In such a vibration transfer device, when a structure supported by the second elastic body rotates in the vibration transfer direction during vibration (movement like swinging, hereinafter referred to as "pitching"), the transfer path becomes uniform. It does not vibrate, and especially at the tip of the transport path (downstream end in the transport direction), the vibration becomes large, and the object to be transported is violently transported, and poor connection with the next process or poor transport occurs. It adversely affects the processing.

Pitching can be prevented or effectively suppressed if the elastic spindle defined by the mounting angle of the elastic body (drive spring), the center of gravity of the first mass body, and the center of gravity of the second mass body completely match. .. However, since it is difficult to apply a center of gravity design that completely satisfies the above conditions to an actual machine, it is a difficult task to suppress pitching.

Therefore, a technique has been devised to suppress pitching by adjusting the vertical spring constant of the anti-vibration leaf spring by changing the angle of the flat plate-shaped spring (anti-vibration leaf spring) which is the anti-vibration spring. (Patent Document 1, Patent Document 2). When a flat plate-shaped spring (vibration-proof leaf spring) is applied as the vibration-proof spring, the principle of suppressing pitching by adjusting the spring constant of the vibration-proof leaf spring in the vertical direction is as follows.

In other words, when the structure supported by the anti-vibration leaf spring is pitching (rotational motion), in order to suppress this pitching, the vertical direction of the anti-vibration leaf spring is made firm (strong) to the ground (stable). When the reaction force from (base, etc.) is transmitted to the structure, a force in the direction opposite to the direction of rotation acts on the structure, and pitching is suppressed. However, if the vertical direction of the anti-vibration leaf spring is made hard (strong), the reaction force to the ground will increase and affect the on-board equipment, or the horizontal direction of the anti-vibration leaf spring will be weakened. After considering the optimum center of gravity design, it is desirable to suppress pitching by the vibration-proof leaf spring.

Japanese Unexamined Patent Publication No. 2012-66931 (Patent No. 5741993) Japanese Unexamined Patent Publication No. 2007-276963 (Patent No. 5332080)

By the way, if the configuration realizes the two functions of the anti-vibration function (horizontal anti-vibration property) and the pitching suppression function (vertical anti-vibration property) with one anti-vibration leaf spring, the angle of the anti-vibration leaf spring. When the vertical spring constant is adjusted with, the horizontal spring constant of the anti-vibration leaf spring always changes, and the degree of pitching changes even if the tilt angle of the anti-vibration leaf spring is slightly changed. , Severe angle adjustment is required.

Further, since the anti-vibration leaf spring is installed between the base and the second mass body, the second mass body vibrates greatly horizontally, and it is necessary to reduce the spring constant of the anti-vibration leaf spring in the horizontal direction. There is. As a result, the anti-vibration leaf spring becomes weak in the horizontal direction, and when an impact is applied, the position shift occurs.

In this way, in the conventional vibration transfer device in which the anti-vibration spring is composed of a flat plate-shaped spring, only the angle of the anti-vibration leaf spring can be adjusted. It was impossible to adjust the spring constant in the horizontal direction individually.

The present invention has focused on such a point, and a main object of the present invention is to provide a vibration transfer device having a vibration-proof structure in which pitching can be easily adjusted.

That is, the present invention relates to a vibration transport device that transports an object to be transported on a linear transport surface by vibration. Here, examples of the object to be transported include electronic parts (workpieces) having a small size, medical parts, and the like, but the objects are not particularly limited as long as they can be transported by the vibration transfer device of the present invention.

Then, the vibration transfer device according to the present invention includes a first mass body having a linear transport surface, a second mass body vibrating in the opposite phase to the first mass body, and a first mass body and a second mass body. A first elastic body to be connected and a second elastic body connecting the base to the second mass body or the first elastic body are provided, and the elastic modulus in the horizontal direction of the second elastic body and the vertical direction of the second elastic body are provided. Regarding the elastic modulus, at least the elastic modulus in the vertical direction of the second elastic body can be changed independently.

Here, the "horizontal elastic modulus of the second elastic body" in the present invention is synonymous with the "elastic modulus of the horizontal component of the second elastic body" and is the "vertical elastic modulus of the second elastic body". Is synonymous with "the elastic modulus of the vertical component of the second elastic body". Further, the "horizontal direction" in the present invention means a direction along the elastic main axis defined by the mounting angle of the first elastic body (a direction parallel to or substantially parallel to the elastic main axis), and the "vertical direction" in the present invention. "Direction" means a direction orthogonal to or substantially orthogonal to the elastic spindle (normal direction with respect to the elastic spindle). That is, in the present invention, the horizontal direction and the vertical direction of the second elastic body are determined with reference to the elastic principal axis of the first elastic body, and the horizontal direction in the "horizontal elastic coefficient of the second elastic body" is the gravity of the earth. In some cases, it coincides with the direction that intersects at right angles to the direction of (horizontal direction defined in physics), and in other cases, it does not intersect at right angles with the direction of gravity of the earth. In some cases, the vertical direction in "Vertical Elasticity Coefficient of In the vibration transfer device according to the present invention, at least the elastic modulus in the vertical direction of the second elastic body is independently related to the elastic modulus in the horizontal direction of the second elastic body and the elastic modulus in the vertical direction of the second elastic body. The structure may be changeable, and the external shape of the second elastic body is not particularly limited.

In the vibration transfer device according to the present invention, when the first elastic body connecting the first mass body and the second mass body is driven by an appropriate vibration means to vibrate, the second mass body becomes a fixed portion (counter). By functioning as a weight) and the second elastic body functioning as a vibration isolator, the first mass body vibrates, and the object to be transported on the linear transport surface can be transported in a predetermined transport direction. Further, in the vibration transfer device according to the present invention, at least the vertical elasticity coefficient of the second elastic body is independent of the horizontal elasticity coefficient of the second elastic body and the vertical elasticity coefficient of the second elastic body. Therefore, the vertical elastic coefficient of the second elastic body can be set to the elastic coefficient that can suppress pitching without affecting the horizontal elastic coefficient of the second elastic body. It is possible to realize a device that facilitates pitching adjustment. Therefore, in a state where the elastic modulus in the horizontal direction of the second elastic body is set large in advance and the device is set to a device (device that is strong against impact) in which misalignment is unlikely to occur even when an impact is applied from the outside. It is also possible to set the elastic modulus in the vertical direction of the second elastic body to an elastic modulus that can suppress pitching without affecting the elastic modulus in the horizontal direction of the two elastic bodies.

In particular, if the vibration transfer device according to the present invention is configured so that the horizontal and vertical elastic coefficients of the second elastic body can be changed independently, the horizontal elastic coefficient of the second elastic body can be changed. By adjusting only the elastic coefficient in the vertical direction of the second elastic body without changing it, it becomes easier to adjust the pitching, and it is possible to suppress pitching without changing the elastic coefficient in the vertical direction of the second elastic body (for example, it is possible to suppress pitching). By adjusting only the horizontal elastic coefficient of the second elastic body (while maintaining a high elastic coefficient), the horizontal elastic coefficient of the second elastic body can be set large, and when an impact is applied from the outside. It is possible to realize a device (a device that is strong against impact) that is unlikely to be displaced.

In particular, if the vibration transfer device according to the present invention has one end of the second elastic body attached to the vibration node of the first elastic body, the node does not displace (vibrate) in the horizontal and vertical directions. Therefore, by attaching one end of the second elastic body to this node, an anti-vibration action is exerted, which makes it possible to set a large elastic modulus in the horizontal direction of the second elastic body. Although the knots can be specified as points, the "knot of the first elastic body" in the present invention is a concept including a predetermined region including a knot that can be specified as a point in the first elastic body.

In Japanese Patent Application Laid-Open No. 11-91928, regarding the piezoelectric drive type transfer device, i) an inertial mass body is fixed to the upper surface of a vibrating body arranged in the lateral direction, and a vibrating body is attached to the lower surface thereof. A configuration for fixing the members, ii) a configuration for connecting and fixing the vibrating body mounting member and the transport body via a first connecting member that is erected in an inclined manner, and iii) a connecting member in the intermediate portion in the longitudinal direction of the first connecting member. A configuration is disclosed in which the support piece is fixed and the connecting member support piece and the base are connected and fixed via the second connecting member. In particular, iv) one end of the second connecting member is screwed to the side surfaces of both ends of the base. The piezoelectric drive type transport device is supported by a configuration in which the other end of the second connecting member is fixed to the connecting member support piece, and the connecting member support piece is fixed to the node portion of the first connecting member. It is disclosed that it is possible to significantly reduce the vibration from the base to its installation surface. Here, the part "fixed to the node portion of the first connecting member" in the same publication is a connecting member support piece that is not an elastic body, and is clearly different from the present invention in this respect. And, with the configuration described in the same publication, it is easy to understand that the elastic modulus in the vertical direction, which contributes to the suppression of pitching, cannot be adjusted at all.

In the vibration transfer device according to the present invention, as the second elastic body, at least one of a horizontal arm portion capable of adjusting the elastic coefficient with respect to the vertical vibration component and a vertical arm portion capable of adjusting the elastic coefficient with respect to the horizontal vibration component. When the one provided with the above is applied, the configuration aimed at by the present invention can be realized even though the shape is simple. It may be provided with both a horizontal arm portion and a vertical arm portion, or may be provided with only one of the arm portions. The horizontal arm portion and the vertical arm portion of the second elastic body do not necessarily have to be orthogonal to each other, and even if they are not orthogonal to each other (the horizontal arm portion and the vertical arm portion intersect at an angle other than 90 degrees). good.

When a second elastic body having a horizontal arm portion and a vertical arm portion is applied, the elastic adjusting member is provided with an elastic adjusting member that presses at least one of the horizontal arm portion and the vertical arm portion in the thickness direction. If the effective length of the arm part to be adjusted can be changed by adjusting the area to be pressed so that it cannot be elastically deformed, the arm part and the part to be connected to the arm part (base and second mass body or first elastic body) can be changed. The effective length of the arm can be easily adjusted while maintaining the relative positional relationship with the body), and as a result, the elasticity coefficient for the vertical vibration component or the elasticity for the horizontal vibration component. The elastic coefficient of at least one of the coefficients can be easily adjusted.

In particular, if the second elastic body is an L-shaped leaf spring having a horizontal arm portion and a vertical arm portion integrally (a single flat plate-shaped leaf spring bent into an L shape), the horizontal arm portion. Alternatively, by appropriately adjusting or changing the effective length of either one of the vertical arms or both, the elastic coefficient in the vertical direction (spring constant) and the elastic coefficient in the horizontal direction (spring) of the second elastic body. (Constant) can be individually set to an appropriate value. Here, by adjusting the vertical effective length of the L-shaped leaf spring (effective length of the vertical arm portion), the horizontal spring constant can be adjusted, and the horizontal effective length of the L-shaped leaf spring (horizontal arm). By adjusting the effective length of the part), the spring constant in the vertical direction can be adjusted.

According to the present invention, focusing on the second elastic body connecting the base and the second mass body or the first elastic body, the elastic modulus in the vertical direction of the second elastic body is the elastic modulus in the horizontal direction of the second elastic body. It is possible to provide a vibration transfer device having a vibration-proof structure in which pitching can be easily adjusted by adopting a configuration that can be changed independently without affecting the above.

The plan view which shows typically the whole of the vibration transfer apparatus (linear feeder) which concerns on one Embodiment of this invention. An exploded perspective view of the vibration transfer device according to the same embodiment. Enlarged view of the main part of FIG. FIG. 5 is a side view showing a part of the vibration transfer device seen from the direction of arrow A in FIG. 1 with some omissions.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the vibration transfer device X according to the present embodiment moves a work K such as an electronic component on a transfer path 14 (a linear transfer path 14 described later) by vibration to a predetermined transfer destination (supply). It is a device that conveys to the previous). The vibration transfer device X of the present embodiment is an device that conveys the work K to a transfer destination along a linear transfer path 14 (hereinafter referred to as “linear transfer path 14”). The upstream end of the linear transport path 14 is connected to the downstream end of the bowl feeder transport path (bowl transport path) for transporting while aligning (not shown). Therefore, the linear feeder X can carry the work K conveyed through the transfer path (bowl transfer path) formed in the bowl feeder to the end of the linear transfer path 14 by vibration and supply it to a predetermined transfer destination. Is. In this linear feeder X, a bowl of the target work K (work K that overflows or work K that is determined not to be in the predetermined transport posture) when it is determined that the work K is not in the predetermined transport posture at the time of overflow. It is equipped with a return unit (return transport path) for returning to the transport path.

As shown in FIGS. 1 to 4, the linear feeder X includes a first mass body 1 having a linear transport surface, a second mass body 2 vibrating in the opposite phase to the first mass body 1, and a first mass. It includes a first elastic body 3 that connects the body 1 and the second mass body 2 to each other, a base 4, and a second elastic body 5 that connects the base 4 and the first elastic body 3 to each other. be.

In the present embodiment, the movable weight 11 (movable portion), which is the main part of the first mass body 1, is arranged above the base 4 having a long shape along the transport direction T, and above the movable weight 11. The counterweight 21 (fixed portion), which is the main part of the second mass body 2, was arranged via the first elastic body 3 and connected to the movable weight 11 via the side connecting plate 12 above the counterweight 21. The shoot stand 13 is arranged. In the present embodiment, as shown in FIG. 2, the movable weight 11 and the chute base 13 are connected to each other via a pair of side connecting plates 12. In FIG. 4, the side connecting plates 12 on the front side of the paper surface are omitted from the paired side connecting plates 12.

A transport path 14 is detachably provided on the upper surface of the chute base 13 via a fixing tool such as a bolt, and vibration is applied to the transport path 14, so that the work K is provided on the transport path 14 in a linear transport surface. Move in (conveyor groove). The chute base 13 moves in synchronization with the vibration of the movable weight 11, and functions as a vibration transmission unit that transmits the vibration of the movable weight 11 to the transport path 14.

In the following description, the transport direction T of the work K along the transport path 14 is the front-rear direction T, the upstream side of the transport direction T is the rear side, and the downstream side of the transport direction T is the front side. Further, the direction orthogonal to the transport direction T in the horizontal plane is defined as the width direction W (transverse direction) (see FIG. 1 and the like).

As shown in FIGS. 2 and 4, the front end portion and the rear end portion of the chute base 13 are overhang portions protruding forward and rearward from the movable weight 11, respectively. For example, a sub movable weight (not shown) can be attached to the downward surface of the front overhang portion of the chute base 13. The side connecting plate 12, the chute base 13, and the transport path 14 are parts that form the first mass body 1 like the movable weight 11.

In the present embodiment, the movable weight 11 which is the main part of the first mass body 1 and the counter weight 21 which is the main part of the second mass body 2 are set to have substantially the same dimensions (front-rear dimension) along the transport direction T. The counter weights 21 and the movable weights 11 are arranged so as to face each other in the height direction.

In the linear feeder X of the present embodiment, the first elastic body 3 is arranged at a position where the front ends and the rear ends of the movable weight 11 and the counter weight 21 are connected to each other.

The first elastic body 3 has a form of a flat plate-shaped spring (leaf spring) whose thickness direction substantially coincides with the transport direction T. A piezoelectric element 31 that functions as a vibration source is attached to the first elastic body 3, and by applying an electric charge to the piezoelectric element 31, the first elastic body 3 is elastically deformed to generate vibration, and the first mass body 1 And the second mass body 2 vibrates. Therefore, the first elastic body 3 functions as a drive spring. The first elastic body 3 of the present embodiment is set so that the normal posture that is not elastically deformed becomes a posture that stands upright in the vertical direction. The spring constant including the first elastic body 3 and the piezoelectric element 31 is appropriately selected according to the conditions of an arbitrary resonance frequency determined by the weight and size of the parts to be conveyed, the weight of the transport path 14 (trough), and the like. In the present embodiment, the first mass body 1 and the second mass body 2 are connected by a plurality of first elastic bodies 3.

Further, in the present embodiment, the first elastic body 3 is also arranged at a position where a predetermined intermediate portion between the front end and the rear end of the movable weight 11 and the counter weight 21 is connected to each other. The first elastic body 3 is arranged in pairs at each arrangement location (a location where the movable weight 11 and the counter weight 21 are connected) with a slight gap in the front-rear direction T. In the present embodiment, a place where the front ends of the movable weight 11 and the counter weight 21 are connected to each other, a place where the rear ends of the movable weight 11 and the counter weight 21 are connected to each other, and a front end and a rear end of the movable weight 11 and the counter weight 21 are connected to each other. A part of the middle part between the front and rear ends that is closer to the front end side than the front end side of the front and rear direction T center, and a middle part between the front end and the rear end of the movable weight 11 and the counter weight 21 that is behind the front and rear direction T center. Adopted a mode in which two first elastic bodies 3 are arranged in a form of arranging two first elastic bodies 3 in the front-rear direction T at four places closer to a predetermined distance, that is, a mode in which a total of eight first elastic bodies 3 are provided. is doing.

The linear feeder X according to the present embodiment has an integral structure (hereinafter, a movable weight 11 which is a main part of the first mass body 1, a counter weight 21 which is a main part of the second mass body 2, and a first elastic body 3). , This integrated structure is referred to as "mainframe M"). As a result, friction does not occur at the connection point between the first mass body 1 and the first elastic body 3 and the connection point between the second mass body 2 and the first elastic body 3, the viscosity coefficient is reduced, and at the time of large amplitude. However, the fixed condition (connection condition at the connection point) does not change, and the non-linearity of the spring is reduced.

Further, since the movable weight 11 and the counter weight 21 are supported by the first elastic body 3 at both ends and the middle portion in the front-rear direction T, the bending change of the movable weight 11 and the counter weight 21 is reduced, and in particular, the main frame M The friction between the movable weight 11 and the side connecting plate 12 is reduced, and the viscosity coefficient is reduced. Further, when the first elastic body 3 is fixed to the first mass body 1 (movable weight 11) or the second mass body 2 (counter weight 21) with a fixture such as a bolt, a space for arranging the fixture is secured. However, according to the present embodiment, since it is not necessary to secure a space for arranging the fixtures, the height dimension of the first mass body 1 can be set large, and the bending rigidity can be improved. As a result, the first mass body 1 (movable weight 11) is less likely to bend in an S shape, and the drive frequency becomes higher. As described above, according to the linear feeder X according to the present embodiment, the drive frequency and amplitude at which the structure (mainframe M) vibrates can be increased, a high resonance magnification can be achieved, and a large amplitude can be obtained. ..

In the linear feeder X of the present embodiment, the first elastic body 3 arranged in the middle portion between the front end and the rear end of the first mass body 1 (movable weight 11) and the second mass body 2 (counter weight 21) is ribbed. This also makes it difficult for the first mass body 1 and the second mass body 2 to bend in an S shape.

In the present embodiment, a main frame M having a movable weight 11, a counter weight 21, and a first elastic body 3 is formed by wire-cutting a mass of metal material. It is also possible to mold the main frame M by a processing process other than the wire cutting process.

In the linear feeder X according to the present embodiment, for example, a counter weight (sub-counter weight) separate from the main frame M can be integrally attached to the counter weight 21. The sub-counterweight is installed in the internal space MS of the main frame M, that is, a relatively large space MS (in a set of two) formed between the first elastic bodies 3 adjacent to each other along the transport direction T. The space between the first elastic bodies 3 arranged close to each other is excluded). In this case, with the sub-counterweight provided in the internal space MS of the main frame M, the sub-counterweight is a part other than the counterweight 21 (first elastic body 3, piezoelectric element 31, movable weight 11, side connecting plate 12). It is important to satisfy the condition of not contacting). The sub-counterweight is a part that constitutes the second mass body 2 like the counterweight 21. The size of the internal space MS of the main frame M (a relatively large space MS partitioned by the first elastic body 3 adjacent to the transport direction T) is a mutually equal size (equal division) as shown in FIGS. It may be an uneven size (unequal division). Note that FIG. 3 is an enlarged view of a main part of FIG. Further, the internal space MS of the main frame M can also be used as an access space for attaching the piezoelectric element 31 to the first elastic body 3.

Here, the vibration transfer device X of the present embodiment is the main part of the movable weight 11 which is the main part of the first mass body 1 which is a movable portion, and the main of the second mass body 2 which functions as a fixed portion with respect to the movable weight 11. A structure (main frame M) having a counter weight 21 which is a part and a first elastic body 3 integrally is provided, and this structure (main frame M) is grounded by a second elastic body 5 (ground in this embodiment). It is configured to support from the base 4) which can be regarded as, and the second elastic body 5 functions as an anti-vibration spring.

In the linear feeder X according to the present embodiment, as shown in FIGS. 2 to 4, the second elastic body 5 is arranged in front of and behind the main frame M, respectively, and each of the second elastic bodies 5 is used to form a base 4 and the base 4. It is connected to the main frame M.

In the present embodiment, the second elasticity is provided by using a flat plate L-shaped elastic member (L-shaped spring 5A) integrally having a vertical arm portion 51 extending in the vertical direction and a horizontal arm portion 52 extending in the horizontal direction. It constitutes the body 5. In the second elastic body 5 shown in FIG. 2 and the like, the tip (upper end) portion of the vertical arm portion 51 is fixed to the first elastic body 3, and the tip end of the horizontal arm portion 52 (the end on which the vertical arm portion 51 does not stand up). Part) The part is fixed to the base 4.

In the present embodiment, a protrusion 32 projecting forward or backward is provided at a node portion of the first elastic body 3 that does not displace in the horizontal and vertical directions, and the tip portion of the vertical arm portion 51 is provided on the protrusion 32. It is fixed. Since both ends (upper end and lower end) of the first elastic body 3 are fixed to the movable weight 11 and the counter weight 21 (holding both ends fixed), the node is the central portion in the longitudinal direction. Here, the node of the first elastic body 3 can be regarded as a point, but the region provided with the protrusion 32 in the first elastic body 3 is a predetermined region including the node of the first elastic body 3 ( A node and a region near the node). The protrusion 32 is provided with female screw holes 33 at two locations separated in the width direction W (see FIG. 3). A bolt insertion hole communicating with each female screw hole 33 is formed in the vertical arm portion 51, and the bolt B1 inserted through the bolt insertion hole is screwed into the female screw hole 33 to form a second elastic body 3. The vertical arm portion 51 of the elastic body 5 can be fixed. A holding plate is interposed between the head of the bolt B1 and the vertical arm portion 51 of the second elastic body 5.

Female screw holes 41 are provided at two positions separated from each other in the width direction W at the front end portion and the rear end portion of the base 4 (see FIG. 3). A female bolt insertion hole communicating with each female screw hole 41 is formed in the horizontal arm portion 52, and a bolt B2 inserted through the female bolt insertion hole is screwed into the female screw hole 41 so that the base 4 is second. The horizontal arm portion 52 of the elastic body 5 can be fixed.

In the linear feeder X according to the present embodiment, the second elastic body 5 is arranged at a position that does not overlap with the first elastic body 3 in the transport direction T, and the upper end portion of the second elastic body 5 is set higher than the first elastic body 3. Since it is attached to a node that is substantially in the center of the longitudinal direction H, the vibration of the transport path 14 becomes stable when the first mass body 1 vibrates, and it is possible to realize a more stable component transport process by that amount. ..

By the way, in order to carry out a more stable work transfer process, it is necessary to prevent the pitching phenomenon from occurring in the transfer path 14.

In the linear feeder X according to the present embodiment, each elastic modulus in the horizontal direction and the vertical direction of the second elastic body 5 is independently adjusted without changing the inclination angle of the first elastic body 3 in the front-rear direction T. Then, the vibration of the first elastic body 3 can be adjusted to be a desired vibration that eliminates or substantially eliminates the pitching phenomenon. Here, the "horizontal elastic modulus of the second elastic body" in the present embodiment is synonymous with the "elastic modulus of the horizontal component of the second elastic body", and the "vertical elastic modulus of the second elastic body". Is synonymous with "the elastic modulus of the vertical component of the second elastic body". Further, the "horizontal direction" in the present embodiment means a direction along the elastic main axis defined by the mounting angle of the first elastic body 3 (a direction parallel to or substantially parallel to the elastic main axis), and the present embodiment. The "vertical direction" in the above means a direction orthogonal to or substantially orthogonal to the elastic main axis (normal direction with respect to the elastic main axis). In the linear feeder X according to the present embodiment, a flat plate L-shape having a horizontal arm portion 52 having an adjustable elastic coefficient with respect to a vertical vibration component and a vertical arm portion 51 having an adjustable elastic coefficient with respect to a horizontal vibration component. By using the second elastic body 5 in the shape, the elastic coefficients in the horizontal direction and the vertical direction of the second elastic body 5 can be adjusted independently without adversely affecting each other.

In the present embodiment, as shown in FIGS. 3 and 4, a flat plate is formed at a position where the tip portion of the horizontal arm portion 52 of the L-shaped leaf spring 5A, which is the horizontal portion of the second elastic body 5, is sandwiched in the height direction H. A shape-shaped elastic adjusting member 6 is arranged, and the elastic adjusting member 6 and the horizontal arm portion 52 are fixed by a common bolt B2. An elongated hole 61 extending in the transport direction T (front-rear direction T) is formed in the elastic adjusting member 6, and the bolt B2 inserted into the elongated hole 61 is also inserted into the female bolt insertion hole of the horizontal arm portion 52. It is tightened by screwing it into the female screw hole 41 of the base 4. Then, with the tightening state of the bolt B2 slightly loosened, the bolt B2 is guided into the elongated hole 61 to change the fixing position of the elastic adjusting member 6 with respect to the horizontal arm portion 52, and the bolt B2 is tightened again at that position. Therefore, the size of the free region (the region that is not tightened or pressed by the bolt B2 and the elastic adjusting member 6) of the horizontal arm portion 52 of the second elastic body 5 can be changed, and as a result, the second elastic body 5. The effective length of the horizontal arm portion 52 of the two elastic body 5 can be changed, and the elastic coefficient (spring constant) of the second elastic body 5 in the vertical direction can be adjusted.

Whether such adjustment work is performed sequentially for each of the second elastic bodies 5 or at the same time can be selected according to the state in which the pitching phenomenon occurs.

The elastic adjusting member 6 is not limited to the one arranged at a position sandwiching the horizontal arm portion 52 in the thickness direction, that is, two arranged with respect to one horizontal arm portion 52, with respect to one horizontal arm portion 52. Only one may be arranged. In this case, if an elastic adjusting member that presses the horizontal arm portion 52 in the thickness direction is applied and the region that is pressed so as not to be elastically deformed by the elastic adjusting member is adjusted, the effective length of the horizontal arm portion 52 can be changed. good. It is also possible to make the elastic adjusting member 6 function as a spacer or a washer.

In the present embodiment, the vertical arm portion 51 of the L-shaped leaf spring 5A, which is the vertical arm portion 51 of the second elastic body 5, has a configuration in which the free region (effective length) cannot be adjusted. In such a configuration, the adjustment of the elastic modulus (spring constant) in the horizontal direction of the second elastic body 5 differs in the size of the vertical arm portion 51 (length in the vertical direction, thickness and width of the spring, number of layers). It can be carried out by replacing (replacement) with the second elastic body (not shown). The vertical arm portion 51 of the second elastic body 5 also has a configuration similar to that of the horizontal arm portion 52, that is, a flat plate-like elasticity at a position where the tip portion of the vertical arm portion 51 is sandwiched in the transport direction T (front-rear direction T). The second elasticity is formed by arranging the adjusting member, forming an elongated hole extending in the height direction H in the elastic adjusting member, and changing the fixing position of the elastic adjusting member with respect to the vertical arm portion 51 by using the elongated hole. It is possible to apply a configuration for changing the size of a free region (a region that is not tightened or pressed by the bolt B2 and the elastic adjusting member 6) of the vertical arm portion 51 of the body 5. Of course, as in the modification of the elastic adjusting member with respect to the horizontal arm portion 52, it is also possible to adopt an embodiment in which one elastic adjusting member is arranged with respect to one vertical arm portion 51. In this case, if an elastic adjusting member that presses the vertical arm portion 51 in the thickness direction is applied and the region that is pressed so as not to be elastically deformed by the elastic adjusting member is adjusted, the effective length of the vertical arm portion 51 can be changed. good.

In the present embodiment, the elastic modulus of the second elastic body 5 provided at two front and rear positions along the transport direction T can be individually adjusted. That is, it is possible to set the elastic moduli of the second elastic bodies 5 at the two front and rear positions to different values.

As described above, according to the linear feeder X according to the present embodiment, the first elastic body 3 connecting the first mass body 1 and the second mass body 2 is driven by the vibration source (piezoelectric element 31) to vibrate. Then, the second mass body 2 functions as a fixed portion (counter weight) and the second elastic body 5 functions as a vibration isolator, so that the first mass body 1 vibrates and is a transport target on the linear transport path 14. The object K can be transported in a predetermined transport direction T. Further, according to the linear feeder X according to the present embodiment, since each elastic coefficient in the horizontal direction and the vertical direction of the second elastic body 5 can be changed independently, the horizontal direction of the second elastic body 5 By adjusting only the elastic coefficient in the vertical direction of the second elastic body 5 without changing the elastic coefficient of the second elastic body 5, pitching adjustment can be easily performed, and the elastic coefficient in the vertical direction of the second elastic body 5 is not changed. By adjusting only the horizontal elastic coefficient of the second elastic body 5 (for example, while maintaining the elastic coefficient that can suppress pitching), the horizontal elastic coefficient of the second elastic body 5 can be set large. , It is possible to realize a device (device that is strong against impact) in which misalignment is unlikely to occur even when an impact is applied from the outside.

In particular, the linear feeder X according to the present embodiment is good because one end of the second elastic body 5 is attached to a node of the first elastic body 3 that does not displace (vibrate) in the horizontal and vertical directions even when vibrating. It has a good anti-vibration effect, which makes it possible to set a large elastic modulus in the horizontal direction of the second elastic body 5.

Further, in the vibration transfer device X according to the present embodiment, as the second elastic body 5, the horizontal arm portion 52 capable of adjusting the elastic coefficient with respect to the vertical vibration component and the elastic coefficient with respect to the horizontal vibration component can be adjusted. Since the one provided with the vertical arm portion 51 is applied, it is possible to realize the configuration aimed at by the present invention in spite of its simple shape.

In addition, a plate-shaped horizontal arm portion 52 and a flat plate-shaped vertical arm portion 51 are applied as the second elastic body, and an elastic adjusting member 6 for pressing the horizontal arm portion 52 in the thickness direction is provided. Since the effective length of the arm portion (horizontal arm portion 52) to be adjusted can be changed by adjusting the region to be pressed so as not to be elastically deformed by 6, the arm portion (horizontal arm portion 52) and the arm portion The effective length of the arm portion (horizontal arm portion 52) can be easily increased while maintaining the relative positional relationship between the base 4 and the first elastic body 3 which are the parts to be connected (horizontal arm portion 52). It can be adjusted, and as a result, the elastic coefficient with respect to the vibration component in the vertical direction can be easily and smoothly adjusted.

In particular, since the second elastic body 5 is an L-shaped leaf spring 5A having the horizontal arm portion 52 and the vertical arm portion 51 integrally, the effective length of either the horizontal arm portion 52 or the vertical arm portion 51, or By adjusting or changing the effective lengths of both, the vertical elasticity coefficient (spring constant) and horizontal elasticity coefficient (spring constant) of the second elastic body 5 can be individually set to appropriate values. Can be done.

The present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, as a configuration for adjusting the elastic coefficient of the L-shaped spring which is the second elastic body, an L-shaped spring is used by using an elastic adjusting member that sandwiches the arm portion of the L-shaped spring in the thickness direction. The configuration for adjusting the effective length (size of the free area) of the arm portion of the spring is illustrated, but the present invention is not limited to this, and the L-shaped spring is L-shaped without using an elastic adjusting member that sandwiches the arm portion in the thickness direction. A configuration that adjusts the elastic coefficient of the spring can be adopted. As an example, an elongated hole is formed in the arm portion of the L-shaped spring, and a female screw is formed at a predetermined pitch along the longitudinal direction of the elongated hole in the portion (base 4 in the above embodiment) for fixing the arm portion. By selecting and changing the female screw hole that fixes the bolt while moving the entire L-shaped spring along the longitudinal direction of the elongated hole, the effective length of the arm (the size of the free area) can be changed. The configuration to be adjusted can be mentioned. With this configuration, the entire structure (mainframe) supported by the L-shaped spring may also move according to the amount of movement of the L-shaped spring.

Further, as described above, a plurality of types of L-shaped springs having different lengths, areas, thicknesses, etc. of the vertical arm portion and the horizontal arm portion are prepared in advance, and an appropriate L-shaped spring is selected from them. The elastic modulus in the horizontal direction and the elastic modulus in the vertical direction of the second elastic body may be changed by changing or replacing the second elastic body.

The number of second elastic bodies and the fixed position with respect to the base can be changed as appropriate. Further, the second elastic body may connect the base and the second mass body.

Springes other than L-shaped springs (for example, springs that connect the base ends of I-shaped springs, T-shaped springs, etc.)
Alternatively, the second elastic body in the present invention can be configured by an elastic body (rubber or the like) other than the spring.

The number and shape of the first elastic body and the connection position of the first elastic body with respect to the first mass body and the second mass body can also be appropriately changed. For example, it is also possible to arrange the first elastic body in a posture inclined by a predetermined angle in the transport direction. The first elastic body in the above-described embodiment is also arranged in a posture inclined by a predetermined angle (about 2 degrees) in the transport direction. As described above, the "horizontal elastic modulus of the second elastic body" in the present invention is synonymous with the "elastic modulus of the horizontal component of the second elastic body", and the "vertical elastic modulus of the second elastic body". Is synonymous with "the elastic modulus of the vertical component of the second elastic body". Further, the "horizontal direction" in the present invention means a direction along the elastic main axis defined by the mounting angle of the first elastic body (a direction parallel to or substantially parallel to the elastic main axis), and the "vertical direction" in the present invention. "Direction" means a direction orthogonal to or substantially orthogonal to the elastic spindle (normal direction with respect to the elastic spindle). That is, in the present invention, the horizontal direction and the vertical direction of the second elastic body are determined with reference to the elastic principal axis of the first elastic body, and the horizontal elastic coefficient of the second elastic body and the vertical direction of the second elastic body are determined. Regarding the elastic coefficient in the direction, at least the elastic coefficient in the vertical direction of the second elastic body may be changed independently, and the external shape of the second elastic body is not particularly limited. Therefore, the horizontal arm portion and the vertical arm portion of the second elastic body do not necessarily have to be orthogonal to each other, and may be, for example, not orthogonal to each other. Further, the present invention also includes a configuration in which the height direction of the base and the vertical direction of the second elastic body coincide with each other.

In the above-described embodiment, the embodiment in which the movable weight 11 (a part of the first mass body 1), the counter weight 21 (a part of the second mass body 2), and the first elastic body 3 are integrally provided has been exemplified. It is also possible to adopt an embodiment in which all or part of the above is a separate body. The vibration transfer device of the present invention includes a mode in which the first elastic body is directly connected to the first mass body and the second mass body, and a mode in which the first elastic body is indirectly connected by interposing another member. Similarly, it includes a mode in which the second elastic body is directly connected to the base and the second mass body or the first elastic body, and a mode in which the second elastic body is indirectly connected by interposing another member. ..

The first mass body may have a linear transport surface, does not have the above-mentioned transport path (trough), has a linear transport surface formed on the upward surface of the chute base, or does not have a chute base and is movable. A linear transport surface may be formed on the upward surface of the weight, or a linear transport surface may be formed on a part (not limited to the chute stand) that vibrates in synchronization with the movable weight.

Further, the second mass body may consist of only a single counterweight or may have a plurality of counterweights. It is also possible to adopt a configuration in which the first mass body is arranged above the second mass body.

The vibration source may be something other than the piezoelectric element.

Further, the object to be transported may be various LEDs such as LEDs, electronic parts other than LEDs, or electronic parts such as food.

Further, in the present invention, the elastic modulus in the vertical direction of the second elastic body can be independently changed with respect to the elastic modulus in the horizontal direction of the second elastic body and the elastic modulus in the vertical direction of the second elastic body. A vibration transfer device in which the elastic modulus in the horizontal direction of the second elastic body is independently and cannot be changed is also included.

In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 ... 1st mass body 1L ... Linear transport surface 2 ... 2nd mass body 3 ... 1st elastic body 4 ... Base 5 ... 2nd elastic body 51 ... Vertical arm part 52 ... Horizontal arm part 5A ... L-shaped plate Spring (L-shaped spring)
K ... Object to be transported X ... Vibration transport device (linear feeder)

Claims (6)

It is a vibration transfer device that conveys the object to be conveyed on the linear transfer surface by vibration.
The first mass body having the linear transport surface and
A second mass body that vibrates in the opposite phase to the first mass body,
A first elastic body connecting the first mass body and the second mass body,
A base and a second elastic body connecting the second mass body or the first elastic body are provided.
Regarding the horizontal elastic modulus of the second elastic body and the vertical elastic modulus of the second elastic body, at least the vertical elastic modulus of the second elastic body can be changed independently. A characteristic vibration transfer device. The vibration transfer device according to claim 1, wherein each elastic modulus in the horizontal direction and the vertical direction of the second elastic body can be changed independently. The vibration transfer device according to claim 1 or 2, wherein one end of the second elastic body is attached to the vibration section of the first elastic body. The second elastic body includes at least one of a horizontal arm portion having an adjustable elastic coefficient with respect to a vertical vibration component and a vertical arm portion having an adjustable elastic coefficient with respect to a horizontal vibration component. Item 2. The vibration transfer device according to any one of Items 1 to 3. An elastic adjusting member for pressing at least one of the horizontal arm portion and the vertical arm portion in the thickness direction is provided, and the effective length of the arm portion is adjusted by adjusting the region to be pressed so as not to be elastically deformed by the elastic adjusting member. The vibration transfer device according to claim 4, which is configured so as to be changeable. The vibration transfer device according to claim 4 or 5, wherein the second elastic body is an L-shaped leaf spring having the horizontal arm portion and the vertical arm portion integrally.

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