JP2018052636A - Vibratory component conveyance device and method of adjusting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust the spring constant of a leaf spring of a vibratory component conveyance device.SOLUTION: A vibratory component conveyance device is configured to: hold a lower end part of a leaf spring 5, coupling an upper vibration body 2 and a lower vibration body 3 together, between an inner press plate 11 and an outer press plate 12 having long holes 11a, 12a formed to extend upward and downward; and then fix the leaf spring to the lower vibration body 3 with a screw 13 penetrating long holes 11a, 12a of both the inner and outer press plate 11, 12 and the leaf spring 5. After the screw 13 is loosened and both the press plates 11, 12 are moved up and down, the screw 13 is only fastened again so as to easily adjust the spring constant by varying an effective length of the leaf spring 5 without attaching or detaching the leaf spring unlike conventional.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vibration-type component conveying device that vibrates a component conveying member by an excitation mechanism and conveys components on the component conveying member, and an adjustment method thereof.

  The vibration-type component conveying device has a trough (component conveying member) in which a straight conveying path is formed attached to the upper vibrating body, and a vibration isolating member in which a lower vibrating body disposed below the upper vibrating body is installed on the floor The upper vibration body and the lower vibration body are connected by a leaf spring at a plurality of locations in the component transport direction, and both vibration bodies are connected by the vibration mechanism and the leaf spring provided between the upper vibration body and the lower vibration body. There is a type that linearly conveys the components on the trough by causing the trough to vibrate substantially in the plate thickness direction of the leaf spring by vibrating.

  In such a vibration type component conveying apparatus, the drive frequency of the vibration mechanism is usually adjusted to a value close to the resonance frequency (natural frequency) determined by the spring constant of the leaf spring and the weight of each component, The trough is vibrated efficiently with little energy (see, for example, Patent Document 1).

  However, when the type of the parts to be transported changes, if the operation is performed at a drive frequency close to the resonance frequency at the time of assembling the apparatus, the necessary parts supply capability may not be obtained. In such a case, by adjusting the spring constant of the leaf spring to change the resonance frequency and operating at a driving frequency close to this, stable component supply can be performed.

  Adjustment of the spring constant of the leaf spring often changes the number of leaf springs used, but the leaf spring to be used may be changed depending on the parts to be conveyed. For example, in the case of a component having a small size and mass, a plate spring having a high spring constant is used, and a small amplitude is generated at a high frequency so that stable conveyance can be performed. On the other hand, in the case of parts with a large size and mass, a large amplitude is required to obtain a high supply capacity. Therefore, a leaf spring that is thin enough to prevent breakage and has a low spring constant is used. Amplitude is generated.

  Also, by connecting the trough and the upper vibrator with a second leaf spring instead of integrating them, the trough amplitude is amplified relative to the amplitude of the upper vibrator, and parts that are more difficult to carry than usual are carried with a larger amplitude. It has also been proposed to make it possible (see, for example, Patent Document 2).

Japanese Patent No. 3836969 JP 2011-105481 A

  However, in the method of adjusting the spring constant by the number of leaf springs or the method of changing the leaf springs used according to the parts to be transported, the conditions for obtaining the frequency and amplitude suitable for the parts to be transported are selected. In addition, it is necessary to repeat the attachment / detachment of the leaf spring and the adjustment of the driving frequency, which is very troublesome.

  Further, in the method of connecting the trough and the upper vibrating body with the second plate spring for amplitude amplification, the trough position is higher than usual and a large space is required in the height direction, so that it is difficult to install. There is a fear.

  Then, this invention makes it a subject to make it easy to adjust the spring constant of the leaf | plate spring of a vibration type component conveying apparatus.

  In order to solve the above-described problem, the vibration type component conveying apparatus of the present invention includes a component conveying member, an upper vibrating body to which the component conveying member is attached, a lower vibrating body disposed below the upper vibrating body, In a vibration-type component conveying apparatus, comprising: a leaf spring that connects the upper vibrating body and the lower vibrating body; and a vibration mechanism that applies vibration to the upper vibrating body and the component conveying member in cooperation with the leaf spring. The leaf spring is arranged such that at least one of an upper end fixed to the upper vibrating body and a lower end fixed to the lower vibrating body is sandwiched between an inner pressing plate and an outer pressing plate. In addition, a configuration is adopted in which means for moving the inner presser plate and the outer presser plate that are opposed to each other with the leaf spring interposed therebetween in the vertical direction and fixing the leaf spring together with the upper vibrator or the lower vibrator is provided.

  According to the above configuration, the effective length of the leaf spring (the length of the vibrating portion) can be changed simply by moving the inner and outer retainer plates sandwiching the leaf spring in the vertical direction and fixing them together with the leaf spring. Since the spring constant can be adjusted, it is possible to save the trouble of attaching and detaching the leaf spring, which is necessary in the conventional spring constant adjusting method for changing the number and type of leaf springs.

  In this case, if the fixing means is formed of a long hole provided in the inner presser plate and the outer presser plate and extending in the vertical direction, and a screw passing through each of the long holes and the plate spring, Since the inner presser plate and the outer presser plate can be fixed at an arbitrary position within the movable range in the vertical direction, the spring constant of the leaf spring can be finely adjusted.

  And the adjustment method of the vibration type component conveying apparatus of the present invention is the adjustment method of the vibration type component conveying apparatus having the above-described configuration, wherein the inner pressing plate and the outer pressing plate are moved in the vertical direction, It includes a step of changing the effective length.

  In the present invention, as described above, the inner presser plate and the outer presser plate sandwiching the end portions of the plate springs connecting the upper vibrator and the lower vibrator are moved in the vertical direction and fixed together with the plate springs. Since the effective length of the leaf spring is changed, the spring constant can be easily adjusted without attaching or removing the leaf spring. Moreover, since the height of the entire apparatus does not change by adjusting the spring constant, there are few restrictions on installation space.

Front view of the component conveying apparatus of the embodiment Left side view of FIG. The front view which shows the state which changed the fixing position of the leaf | plate spring lower end part of the components conveying apparatus of FIG. Left side view of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, the vibration type component conveying apparatus is configured such that a trough (component conveying member) 1 in which a linear component conveying path 1 a is formed is attached to the upper surface of an upper vibrating body 2. Is supported by a vibration isolating member 4 installed on the floor F, and the upper vibrator 2 and the lower vibrator 3 are vertically moved at the upstream end and the downstream end in the component conveying direction. The linear feeder is provided with an excitation mechanism 6 that is connected by a leaf spring 5 that extends at an inclination and generates vibration between the upper vibrator 2 and the lower vibrator 3.

  The vibration mechanism 6 includes an AC electromagnet 7 installed on the lower vibrating body 3 and a movable iron core 8 attached to the upper vibrating body 2 so as to face the electromagnet 7 at a predetermined interval. Yes. When the electromagnet 7 of the vibration mechanism 6 is energized, an intermittent electromagnetic attractive force acts between the electromagnet 7 and the movable iron core 8, and both the vibrating bodies 2 and 3 are applied to this electromagnetic attractive force and the restoring force of the leaf spring 5. Vibration occurs, and the trough 1 integrated with the upper vibrating body 2 vibrates in the plate thickness direction of the leaf spring 5 so that the parts on the trough 1 are conveyed linearly. The configuration of the vibration mechanism is not limited to that composed of an AC electromagnet and a movable iron core as in this embodiment, and any actuator that can generate a similar vibration force may be used.

  The upper vibrating body 2 has a pair of leaf spring mounting surfaces 2a inclined at a certain angle at both ends in the component conveying direction. Similarly, the lower vibrating body 3 also has a pair of leaf spring mounting surfaces 3a inclined at a certain angle at both ends in the component transport direction.

  And the upper end part of each said leaf | plate spring 5 is being fixed to the upper vibration body 2 with the press plate 9 with the screw 10 in the state pressed against the leaf | plate spring attachment surface 2a of the upper vibration body 2 with the press plate 9. FIG. On the other hand, the lower end portion of each leaf spring 5 is sandwiched between the inner retainer plate 11 and the outer retainer plate 12 and pressed against the leaf spring mounting surface 3a of the lower vibrating body 3, and the inner retainer plate 11 and the outer retainer plate 12 are pressed. At the same time, the lower vibrator 3 is fixed with screws 13.

  Here, the inner presser plate 11 and the outer presser plate 12 are respectively formed with elongated holes 11a and 12a extending in the vertical direction, and the lower screw 13 for fixing the lower end of the leaf spring 5 is used as the outer presser. The long hole 12 a of the plate 12, the leaf spring 5, and the long hole 11 a of the inner presser plate 11 are sequentially passed through and screwed into the lower vibrating body 3. That is, the inner presser plate 11 and the outer presser plate are formed by the long holes 11a and 12a provided in the inner presser plate 11 and the outer presser plate 12, and the long holes 11a and 12a and the screws 13 passing through the leaf springs 5. Fixing means for fixing 12 to the lower vibrating body 3 together with the leaf spring 5 is configured.

  Therefore, in this vibration type component conveying apparatus, the lower screw 13 is loosened, the inner presser plate 11 and the outer presser plate 12 facing each other with the leaf spring 5 interposed therebetween are moved in the vertical direction, and then the lower screw is again provided. By tightening 13, the effective length L of the leaf spring 5 can be easily changed and the spring constant can be adjusted. In this case, it is not necessary to attach and remove the leaf spring as in the conventional case, and it is efficient. Adjustment work can be performed. At this time, the presser plates 11 and 12 have elongated holes 11a and 12a extending in the vertical direction, and can be fixed at any position within the movable range in the vertical direction, so that the spring constant of the leaf spring can be finely adjusted. Can also be done easily. Moreover, since the height of the entire apparatus does not change by adjusting the spring constant, there are few restrictions on installation space.

  Then, by adjusting the spring constant as described above, vibration characteristics (frequency and amplitude) suitable for the parts to be conveyed can be obtained.

  For example, FIGS. 1 and 2 illustrate a case where the inner presser plate 11 and the outer presser plate 12 are fixed at the highest position within the movable range. At this time, the inner presser plate 11 and the outer presser plate 12 are fixed so that the uppermost portion of the contact surface with the leaf spring 5 is located in the same plane in the plate thickness direction. The effective length L is the same for the upstream leaf spring 5 and the downstream leaf spring 5 in the component conveying direction.

  In this case, since the effective length L of the leaf spring 5 is the shortest and the spring constant is the largest within the adjustable range, the allowable amplitude is small, but the resonance frequency (inherent frequency of the upper vibrator 2 and the trough 1 is inherent). (Frequency) becomes high, and it becomes possible to operate efficiently at a high driving frequency. That is, vibration characteristics (small amplitude and high frequency vibration) suitable for conveying parts having a small size and mass can be obtained.

  On the other hand, FIG. 3 and FIG. 4 show the case where the inner presser plate 11 and the outer presser plate 12 are fixed at the lowest position within the movable range, contrary to the cases of FIGS. Also at this time, the inner presser plate 11 and the outer presser plate 12 are fixed so that the uppermost portion of the contact surface with the leaf spring 5 is located in the same plane in the plate thickness direction, and upstream and downstream in the component conveying direction. On the side, the effective length L of the leaf spring 5 has the same dimensions.

  In the case of FIGS. 3 and 4, the effective length L of the leaf spring 5 is the longest and the spring constant is the smallest within the adjustable range, so that the allowable amplitude is increased, while the upper vibrator 2 and The resonance frequency (natural frequency) of the trough 1 becomes low, and it becomes possible to operate efficiently at a low driving frequency. That is, it is possible to obtain vibration characteristics (vibration with a large amplitude and low frequency) suitable for conveying parts having a large size and mass.

  In addition, since the number of leaf springs 5 can be arbitrarily selected at the time of assembling the apparatus, an appropriate number of leaf springs 5 are incorporated in consideration of the range of the size and mass of parts that can be transported, and the spring constant is roughly adjusted. If the inner presser plate 11 and the outer presser plate 12 are moved in the vertical direction and finely adjusted the spring constant according to the actual parts to be conveyed during operation, more various vibration characteristics can be obtained. It becomes like this.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  For example, in the above-described embodiment, only the lower end portion of the leaf spring is fixed between the inner presser plate and the outer presser plate that can be moved up and down and fixed to the lower vibrating body. However, the same fixing method is applied to the upper end portion of the leaf spring. It can also be applied to fixing to the upper vibrating body, and if applied to both ends of the leaf spring, the adjustment range of the spring constant can be expanded.

  Further, the present invention can be applied not only to the linear feeder as in the embodiment, but also to a bowl feeder that conveys parts on the bowl by vibrating the bowl with a vibration mechanism and a leaf spring.

1 trough (component conveying member)
2 Upper vibration body 2a Leaf spring mounting surface 3 Lower vibration body 3a Leaf spring mounting surface 4 Vibration isolation member 5 Leaf spring 6 Excitation mechanism 7 AC electromagnet 8 Movable iron core 9 Presser plate 10 Screw 11 Inner presser plate 11a Long hole 12 Outer presser Plate 12a Long hole 13 Screw F Floor

Claims (3)

A component conveying member, an upper vibrating body to which the component conveying member is attached, a lower vibrating body disposed below the upper vibrating body, a leaf spring connecting the upper vibrating body and the lower vibrating body, and the plate In a vibration-type component conveying device provided with a vibration mechanism for applying vibration to the upper vibrating body and the component conveying member in cooperation with a spring,
The leaf spring is arranged in a state where at least one of an upper end portion fixed to the upper vibrating body and a lower end portion fixed to the lower vibrating body is sandwiched between an inner pressing plate and an outer pressing plate. A fixing means is provided for moving the inner presser plate and the outer presser plate facing each other across the plate spring in the vertical direction so as to fix the plate spring together with the upper vibrator or the lower vibrator. Vibrating parts conveyor.   The said fixing means comprises a long hole provided in the inner and outer pressing plates and extending in the vertical direction, and a screw that passes through each of the long holes and the leaf spring. 2. The vibratory component conveying apparatus according to 1. A method for adjusting a vibration component conveying device according to claim 1 or 2,
A method for adjusting a vibration type component conveying apparatus, comprising a step of moving the inner presser plate and the outer presser plate in a vertical direction to change an effective length of the leaf spring.

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