JP2004067256A - Parts feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To feed parts at a higher speed on the upperstream side of a chute than that on the downstream side of the chute in a straight advancing feeder of a parts feeder. <P>SOLUTION: With the inclination θ<SB>1</SB>of a plate spring 14a on the upperstream side of the chute 4 in the rear to the parts feeding direction of the chute 4 of a straight advancing feeder 8 made less than the inclination θ<SB>2</SB>of a plate spring 14b and by providing a ceiling 23, which vibrates integral with the chute 4 and come into contact with the parts leaping up from the travelling passage 5 above a travelling passage 5 on the downstream side of the chute 4, where the inclination θ<SB>2</SB>of a plate spring 14b is made larger, the parts feeding speed on the upperstream side of the chute 4 is made higher than that on the downstream side of the chute 4 so that even if parts are removed from the travelling passage 5 on the upperstream side of the chute 4, higher parts feeding ability can be secured by shortening the interval between parts on the downstream side of the chute 4. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component feeder provided with a vibrating linear feeder.
[0002]
[Prior art]
As shown in FIG. 7, the vibrating linear feeder supports an upper vibrating body 52 to which a chute 51 is attached by a pair of front and rear leaf springs 53 on a lower vibrating body 54 on a base. A tilt angle θ that is inclined upward from the vertical line to the rear is provided, and the electromagnetic force between the electromagnet 55 as a vibration source and the movable iron core 56 applies vibration to the chute 51 in the front-rear direction to convey parts. is there.
[0003]
As shown in FIG. 8, since the chute 51 vibrates in the direction of the elevation angle θ equal to the inclination angle θ of the leaf spring 53, the component 58 on the conveyance path 57 of the chute 51 corresponds to the vibration elevation angle θ of the chute 51. The sheet is conveyed while jumping forward at a jump angle α. Normally, in a straight-ahead feeder that requires only a high transport speed, the inclination angle θ of the leaf spring 53 is set to about 10 °.
[0004]
Conventionally, the role of a straight-ahead feeder in a component supply device has often been to simply transfer and supply components arranged in an upstream bowl feeder in accordance with a pitch required by various devices arranged at a discharge end. . For this reason, in the conventional straight-ahead feeder, the components need only be conveyed from the upstream side to the downstream side of the chute at a constant speed, and the inclination angle θ of the pair of front and rear leaf springs is set to the same angle.
[0005]
However, in a recent component supply device, for example, as described in Japanese Patent Application Laid-Open No. 2000-118682, the upstream bowl feeder is configured to simply send out components to the linear feeder, and is mounted on a chute of the linear feeder. The number of parts to be arranged is increasing. There is also a type in which two linear feeders are arranged close to each other in opposite directions, and components supplied from one linear feeder are aligned on the chute of the other linear feeder.
[0006]
In a component feeder that arranges components on a chute of such a linear feeder, an alignment tooling unit such as a groove, a slope, a protrusion, or a notch is provided on an upstream side of the chute to sort and align components in a predetermined posture. ing. On the downstream side of the chute, the components are conveyed to the discharge end while maintaining the posture of the aligned components.
[0007]
[Problems to be solved by the invention]
In the straight feeder as described above, components such as posture defects are eliminated on the upstream side of the chute, so if the components are transported at a constant speed from the upstream side to the downstream side of the chute, the component intervals on the downstream side will increase. There is a problem that the parts supply capacity cannot be improved. Therefore, if the component transport speed on the upstream side can be made higher than that on the downstream side, the overall component supply capability can be improved.
[0008]
On the other hand, as a component supply device that sets the component transport speed in the straight-ahead feeder different between the upstream side and the downstream side of the chute, there is one described in JP-A-2002-46842. This component supply device increases the above-described component jump angle α on the downstream side of the chute by increasing the inclination angle θ of the pair of leaf springs before and after supporting the chute on the front side and on the rear side. The component conveying speed on the side is made faster than that on the upstream side, and the intervals between the components are provided on the downstream side so that the number of components can be counted accurately.
[0009]
The components supplied by the component supply device are tablets or capsules having a disk shape or a cylindrical shape, and do not require the components to be aligned. For this reason, the conveyance path of the chute is U-shaped with a blue ceiling. In such a configuration of the transport path, the components are greatly jumped downstream of the chute in which the inclination angle θ of the leaf spring is increased, and the transport speed is increased.
[0010]
Therefore, the linear feeder of this component supply device cannot be applied to a device for aligning components on the chute as described above and for improving the component supply capability.
[0011]
Therefore, an object of the present invention is to increase the component transport speed in a straight-ahead feeder that arranges components on a chute on the upstream side of the chute on the upstream side.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a method in which a chute is supported on a base by a pair of front and rear leaf springs, and each of these leaf springs is provided with an inclination angle θ inclined upward from a vertical line to a rearward direction to generate vibration. A component feeder provided with a rectilinear feeder provided with a component arranging portion on a transport path on the upstream side of the chute, by imparting vibration in a front-rear direction to the chute from the source to convey the component; respect, the inclination angle theta ₁ of the rear upstream of the leaf spring is made smaller than the inclination angle theta ₂ of the front downstream side of the leaf spring, relatively large and the downstream side inclination angle theta ₂ of the leaf spring Above the transfer path, a ceiling is provided that vibrates integrally with the chute and contacts a component that jumps up from the transfer path, and the component transfer speed on the upstream side of the chute is higher than that on the downstream side.
[0013]
As described above, when the inclination angle θ of the leaf spring that supports the chute of the rectilinear feeder is increased, the component jumping angle α is increased, and the transport speed is increased. Therefore, in order to relatively greater than the downstream parts conveying speed of the upstream side of the chute, first, the inclination angle theta ₁ of the upstream side of the leaf spring larger than the inclination angle theta ₂ of the downstream side of the leaf spring It is possible to do. However, in the linear feeder for aligning the parts on the upstream side of the chute, by increasing the inclination angle theta ₁ of the upstream side of the leaf spring, the posture becomes unstable bounce component is increased, the selection of components, the alignment accuracy And the amount of parts transported to the downstream side decreases.
[0014]
The present inventors have found that the selection of components, in order to convey efficiently to ensure alignment accuracy, it was confirmed that the inclination angle theta ₁ of the upstream side of the plate spring 4 ° may be reduced to around. As a result, it is possible to secure the posture of the component and stably allow the component having a good posture to pass through the alignment tooling portion such as the notch. At this time, the inclination angle theta ₂ of the downstream side of the leaf spring, when the same 4 ° longitudinal inclination angle theta ₁ of the upstream side of the leaf spring, the conveyance path on the downstream side protrudes largely forward, installation conditions Ya In some cases, the component is susceptible to the influence of the vibration frequency and the like, and the component jumping angle α becomes too small, so that the component cannot be transported.
[0015]
Therefore, as this solution, selection of parts to reduce the inclination angle theta ₁ of the upstream side, while ensuring the alignment accuracy, and increasing the inclination angle theta ₂ of the downstream side of the leaf spring. As a result, a sufficient component jumping angle α can be obtained in the downstream transport path, but the dancing of the parts becomes excessive, and some of the parts jump out of the transport path due to collision between the front and rear parts. In addition, a ceiling vibrating integrally with the chute is provided above the downstream conveying path to prevent parts from jumping out. It has been found that when such a ceiling is provided, the component transport speed on the downstream side is lower than that on the upstream side.
[0016]
That is, when the inclination angle θ ₂ of the leaf spring on the downstream side is increased and the behavior in the case where such a ceiling is provided is analyzed in detail, the part that greatly jumps up due to the inclination angle θ ₂ of the large leaf spring vibrates integrally with the chute. When the ceiling comes in contact with the ceiling, it is found that the ceiling is in the middle of returning in the direction opposite to the transport direction, and that the parts that jumped up in the transport direction are decelerated by receiving the force in the opposite direction from the ceiling, thus solving the above-described problem. Was completed. Note that the absolute transport speed level can be ensured by adjusting the amplitude or frequency of the vibration.
[0017]
Wherein the inclination angle theta ₁ of the upstream side of the leaf spring and 3 to 5 °, it is preferable that the inclination angle theta ₂ of the downstream side of the leaf spring and 5 to 8 °.
[0018]
Was the inclination angle theta ₁ of the upstream side of the leaf spring and 3 to 5 °, when more than the inclination angle theta ₁ is 5 °, bounce parts is increased, the selection of components on the upstream side, aligned precision There was lowered, the inclination angle θ less than ₁ 3 °, and bounce component almost disappears, because not enough transport speed.
[0019]
To that an inclination angle theta ₂ of 5 to 8 ° of the downstream side of the leaf spring, the inclination angle theta ₂ exceeds 8 °, the conveying speed of the parts in contact with the ceiling suddenly decreases, the inclination angle theta ₂ If the angle is less than 5 °, the component arising angle α may be too small due to the above-described installation conditions, vibration frequency, and the like, and the component may not be conveyed.
[0020]
By providing a guide surface for guiding the aligned components in four directions on the transport path on the downstream side of the alignment unit, the posture of the components aligned on the upstream side can be reliably held on the downstream side. .
[0021]
The above-described component supply device is suitable for supplying a small component having a volume of approximately 10 mm ³ or less, in which the component is lightweight and easily jumps up.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, the component supply device conveys components to be fed into a bowl 1 along a helical conveyance path 2 and a vibratory bowl feeder 3 and conveys the components from the bowl feeder 3. The vibrating linear feeder 8 receives components on the chute 4, arranges the components on an aligning section 6 provided on a transport path 5 on the upstream side of the chute 4, and conveys the components to a discharge end 7.
[0023]
This component supply device supplies a rectangular parallelepiped micro component 9 having a volume of approximately 10 mm ³ or less as shown in FIG. 3 to a device arranged at the discharge end 7 with its posture aligned in the longitudinal direction. is there.
[0024]
In the bowl feeder 3, an upper vibrating body 10 to which the bowl 1 is attached is vertically connected to a lower vibrating body 12 by a plurality of leaf springs 11 arranged in the circumferential direction. And a movable iron core and an electromagnet (not shown) are incorporated into the bowl 1 and the bowl 1 is torsionally vibrated integrally with the upper vibrator 10 by an electromagnetic force acting between the movable iron core and the electromagnet.
[0025]
As shown in FIG. 4, the linear feeder 8 has an upper vibrating body 13 to which a chute 4 is attached, supported by a lower vibrating body 15 by a pair of front and rear leaf springs 14a and 14b, and incorporated in the upper vibrating body 13. The chute 4 vibrates in the front-rear direction integrally with the upper vibrating body 13 by the electromagnetic force acting between the movable iron core 16 and the electromagnet 17 incorporated in the lower vibrating body 15. FIG. 4 shows a state in which the cover 18 of the vibration drive unit shown in FIG. 1 is removed, and the lower vibrator 15 is attached to the base 20 with a vibration-proof spring 19.
[0026]
The rear tilt angle theta ₁ from the vertical line on the upstream side of the plate spring 14a is 4 °, the inclination angle theta ₂ of the front downstream side of the leaf spring 14b is set to 6 °, towards the inclined angle theta ₂ is inclined It is larger than the angle θ _1.
[0027]
As shown in FIG. 5, the alignment section 6 provided in the transport path 5 on the upstream side of the chute 4 is cut out so that the width of the transport path 5 is substantially equal to the width dimension of the component 9. The component 9 conveyed in the horizontal direction falls into the notch 21 with the vibration of the conveyance path 5 and is returned to the bowl 1. Therefore, only the component 9 in a predetermined posture, which is transported with the longitudinal direction directed in the traveling direction, is transported downstream.
[0028]
As shown in FIG. 6, the transfer path 5 on the downstream side of the alignment section 6 is provided with left and right walls 22 and a ceiling 23 so as to guide four rounds of the rectangular cross section of the component 9 in the transfer direction. I have. In order to allow the parts 9 to jump, a larger gap is provided on the ceiling 23 side than on each wall 22 side, and the members forming the ceiling 23 are attached so as to vibrate integrally with the chute 4.
[0029]
Therefore, the conveying path 5 on the downstream side of the chute 4 to the inclination angle theta ₂ of the plate spring 14b is set large and part 9 is going Haneagaro large, the flow returns to just after jumped in the direction opposite to the conveying direction the ceiling 23 , And is slowed down at a speed lower than the transport speed on the upstream side where the alignment unit 6 is provided. For this reason, even if a component having a poor posture is eliminated in the upstream alignment unit 6, the component interval is reduced on the downstream side, and the components 9 are arranged at a short pitch at the discharge end 7 so that the components 9 are required one after another. Supplied.
[0030]
In the embodiment described above, the straight feeder is incorporated on the downstream side of the bowl feeder. However, the straight feeder of the component supply device according to the present invention has a need to increase the component transport speed on the upstream side from the downstream side. Can be incorporated into any site having
[0031]
【The invention's effect】
As described above, the component supply device of the invention, to the component carrying direction of the chute linear feeder, also the inclination angle theta ₁ of the rear upstream of the leaf spring than the inclination angle theta ₂ of the front downstream side of the leaf spring and small, above the transport path on the downstream side with a larger inclination angle theta ₂ of the plate spring, vibrate the chute integrally, is provided with the ceiling of decelerating in contact with the component jumps from conveying path, the chute Even if parts are eliminated at the upstream conveying path alignment section by increasing the component conveying speed on the upstream side compared with the downstream side, the intervals between the components on the downstream side are reduced to increase overall component supply capacity. Can be secured.
[0032]
Also, by providing a guide surface for guiding the aligned components in four directions on the transport path on the downstream side of the alignment section, the posture of the components aligned on the upstream side can be reliably held on the downstream side. Can be.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a component supply device. FIG. 2 is a plan view of FIG. 1. FIG. 3 is an external perspective view showing components supplied by the component supply device of FIG. FIG. 5 is a sectional view taken along line VV in FIG. 4; FIG. 6 is a sectional view taken along line VI-VI in FIG. 4; FIG. 7 is a front view showing a conventional straight-moving feeder. FIG. 8 is a front view for explaining the jumping of components in the transport path of the straight-ahead feeder.
DESCRIPTION OF SYMBOLS 1 Bowl 2 Conveying path 3 Bowl feeder 4 Chute 5 Conveying path 6 Alignment part 7 Discharge end 8 Straight feeder 9 Parts 10 Upper vibrating body 11 Leaf spring 12 Lower vibrating body 13 Upper vibrating bodies 14a, 14b Leaf spring 15 Lower vibrating body 16 Movable Iron core 17 Electromagnet 18 Cover 19 Anti-vibration spring 20 Base 21 Notch 22 Wall 23 Ceiling

Claims (4)

The chute is supported on a base by a pair of front and rear leaf springs, and each of these leaf springs is provided with an inclination angle θ that is inclined upward from a vertical line to a rearward direction. A component feeder provided with a straight-line feeder provided with an alignment section for components in a transport path on the upstream side of the chute, wherein the inclination of the leaf spring on the rear upstream side with respect to the component transport direction of the chute. the angle theta ₁ is made smaller than the inclination angle theta ₂ of the front downstream side of the leaf spring, above the transport path of the inclination angle theta ₂ a relatively larger the downstream side of the plate spring, the vibration in the chute and integral A component feeder, wherein a ceiling is provided for contacting components jumping up from a transport path, and the component transport speed on the upstream side of the chute is higher than that on the downstream side. Wherein the inclination angle theta ₁ of the upstream side of the leaf spring and 3 to 5 °, the component supply device according to claim 1 in which the inclination angle theta ₂ of the downstream side of the leaf spring and 5 to 8 °. 3. The component supply device according to claim 1, wherein a guide surface that guides four aligned components is provided on a transport path downstream of the alignment unit. 4. 4. The component supply device according to claim 1, wherein the component is a micro component having a volume of approximately 10 mm ³ or less. 5.

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