JP4426641B1 - Electromagnetic feeder - Google Patents

Abstract

An object of the present invention is to increase the conveyance speed of a conveyance object by increasing the amplitude of a chute without widening the gap between an electromagnetic coil and a magnetic body, or to reduce power consumption while maintaining the conveyance speed of the conveyance object. To provide an electromagnetic feeder that can be used.
An electromagnetic feeder 1 for conveying potato chips C disposed on a chute 2 is installed on a floor F via a vibration isolating rubber 4 and connected to the chute 2. A first vibrating body 21, a second vibrating body 22 disposed above the first vibrating body 21, a first elastic rubber 23 connecting the first vibrating body 21 and the second vibrating body 22, and a second A third vibrating body 24 disposed above the vibrating body 22; a second elastic rubber 25 connecting the second vibrating body 22 and the third vibrating body 24; the second vibrating body 22 and the third vibrating body 24; And the magnetic body 29 and the electromagnetic coil 27 attached between the first elastic rubber 23 and the total rigidity of the first elastic rubber 23 are made smaller than the total rigidity of the second elastic rubber 25.
[Selection] Figure 1

Description

  The present invention relates to an electromagnetic feeder that transports an object to be transported using vibration caused by electromagnetic force.

  In general, a feeder is well known as an apparatus that conveys an object to be conveyed using vibration. In this feeder, there are various methods depending on the driving force that gives vibration. For example, a motor system using a motor as a motive power, a cylinder system using an air cylinder as a motive power, an electromagnetic system using an electromagnetic coil as a motive power, and the like.

  In this way, there are various types of feeders depending on the motive power, but the vibration ON / OFF switching time is short, quietness during driving, ease of maintenance, especially no need for oil etc. in the driving part, etc. Due to its advantages, the electromagnetic type is often used.

  An example of an electromagnetic feeder is described in Patent Document 1. The electromagnetic feeder includes a base block 6 supported by a frame 40 on the floor via a vibration-proof rubber spring mechanism 23 and a leaf spring mounting block 2 disposed above the base block 6, and a pair of front and rear inclined leaf springs 10, 11, an electromagnetic coil 22 that vibrates the base block 6 and the leaf spring mounting block 2 is provided between the base block 6 and the leaf spring mounting block 2, and is linearly conveyed above the leaf spring mounting block 2. The trough 4 (chute part) which has a path is attached.

  Such an electromagnetic feeder is composed of an electromagnetic coil 22 attached to the base block 6 and a magnetic body attached to the leaf spring mounting block 2 so as to face the electromagnetic coil 22 at a predetermined interval. In many cases (see Patent Document 2), by applying an alternating current to the electromagnetic coil, the leaf spring mounting block 2 and the trough 4 vibrate integrally in the plate thickness direction of the inclined leaf springs 10 and 11, and the trough 4 parts are conveyed in a certain direction.

  Although this is an electromagnetic feeder with many advantages, there is a desire to further increase the work efficiency by increasing the transfer speed of the transfer object, or to reduce the power consumption while maintaining the transfer speed of the transfer object. was there.

  In this regard, Patent Document 3 includes a first electromagnet 66a that vibrates the trough 50 (chute portion) in the horizontal direction and a second electromagnet 68a that vibrates the trough 50 in the vertical direction. An elliptical vibration feeder is disclosed in which a trough 50 is caused to elliptically vibrate with a phase difference between horizontal and vertical vibration displacements caused by the exciting force of two electromagnets 66a and 68a. According to this, the trough 50 can guarantee a uniform transport speed over the entire trough 50 without performing any pitching motion. That is, the object to be transported on the trough 50 can be transported efficiently (increased transport speed).

JP-A-8-239113 JP-A-10-291623 JP 2003-40418 A

  However, since two electromagnets (first and second electromagnets 66a and 68a) are used as the vibration source to convey the object to be conveyed, the power consumption increases and it is uneconomical to use for a long time.

  Therefore, it is desirable to increase the conveyance speed of the object to be conveyed while using only one electromagnet to reduce power consumption. Here, in order to increase the conveyance speed of the conveyance object in the electromagnetic feeder, it is generally necessary to increase the amplitude at the chute portion that becomes the conveyance path of the conveyance object. In order to increase the amplitude at the chute portion, it is necessary to increase the amplitude of vibration generated between the electromagnetic coil and the magnetic body by widening the gap (gap) between the electromagnetic coil and the magnetic body. However, if the gap is excessively widened, an overcurrent flows through the electromagnetic coil to increase power consumption, and the electromagnetic coil may be heated and coil burning may occur.

  Therefore, the present invention has been made paying attention to the situation as described above, and the purpose thereof is to increase the amplitude of the chute portion without increasing the gap (gap) between the electromagnetic coil and the magnetic body. An object of the present invention is to provide an electromagnetic feeder that can increase the conveying speed of an object or reduce the power consumption while maintaining the conveying speed of the object.

  An electromagnetic feeder according to a first aspect of the invention for achieving the above object is an electromagnetic feeder that conveys a conveyance object placed on a chute by vibration caused by electromagnetic force, and is on the floor via a vibration isolating member. A first vibrating body connected to the chute portion, a second vibrating body disposed above the first vibrating body, the first vibrating body, and the second vibrating body, A first elastic member connecting the second vibrating body, a second elastic member connecting the second vibrating body and the third vibrating body, and the second elastic member. And a magnetic body and an electromagnetic coil attached between the vibrating body and the third vibrating body, wherein the rigidity of the first elastic member is smaller than the rigidity of the second elastic member. Yes.

  According to this configuration, the third vibrating body and the second vibrating body can be vibrated with a phase difference by generating vibration by applying an electromagnetic force between the electromagnetic coil and the magnetic body. The vibration having a phase difference between the third vibrating body and the second vibrating body vibrates the first vibrating body via the first elastic member. And the conveyance object on a chute | shoot part can be conveyed because the vibration in a 1st vibrating body is transmitted to a chute | shoot part. Here, since the rigidity of the first elastic member is set to be smaller than the rigidity of the second elastic member, the amplitude of vibration at the chute portion is the amplitude of vibration generated between the electromagnetic coil and the magnetic body. Than can be amplified. As a result, the amplitude of the chute can be increased without widening the gap (gap) between the electromagnetic coil and the magnetic body, the conveyance speed of the conveyance object is increased, or the conveyance speed of the conveyance object is consumed as it is. The power can be lowered.

  Moreover, since the gap is not widened, overcurrent does not flow through the electromagnetic coil and power consumption does not increase, and the electromagnetic coil is not heated and coil burn does not occur.

  The electromagnetic feeder according to the second invention is characterized in that, in the first invention, the first elastic member and the second elastic member are formed of a plurality of rubbers having the same shape.

  According to this configuration, the first elastic member and the second elastic member are formed of a plurality of rubbers having the same shape, thereby changing the number of rubbers corresponding to the first elastic member and the second elastic member, thereby increasing the rigidity. Can be set freely. Specifically, the rigidity can be reduced by making the number of rubbers used as the first elastic member smaller than the number of rubbers used as the second elastic member. Moreover, since the rubber | gum which has the same shape is used for the 1st elastic member and the 2nd elastic member, substitution property is high and it is economical.

  The electromagnetic feeder according to a third aspect of the present invention is the electromagnetic feeder according to the first or second aspect, wherein the frequency generated by the electromagnetic force of the electromagnetic coil is close to the natural frequency or the natural frequency of the entire electromagnetic feeder. It is characterized by being a number.

  With this configuration, by setting the frequency generated by the electromagnetic force of the electromagnetic coil to the natural frequency of the entire electromagnetic feeder or a frequency close to the natural frequency, the amplitude of vibration transmitted to the chute can be amplified to the maximum. it can.

  According to a fourth aspect of the present invention, there is provided the electromagnetic feeder according to any one of the first to third aspects, the center of gravity position including the chute portion and the first vibrating body, the second vibrating body, and the third vibrating body. The center of gravity position including the vibrating body, the second elastic member, the magnetic body, and the electromagnetic coil is arranged to be coincident with or close to the center of gravity.

  According to this configuration, the position of the center of gravity including the chute portion and the first vibrating body matches the position of the center of gravity including the second vibrating body, the third vibrating body, the second elastic member, the magnetic body, and the electromagnetic coil. Since it arrange | positions in the near position, the further uniformization of the vibration transmitted to a chute | shoot part can be achieved. That is, the conveyance object on the chute can be conveyed at a uniform speed without stagnation.

  An electromagnetic feeder according to a fifth aspect of the present invention is the electromagnetic feeder according to any one of the first to fourth aspects, wherein the frequency setting device sets the frequency of the chute to be maintained and the vibration that detects the frequency of the chute. And a frequency control device that controls the frequency of the electromagnetic coil so that the frequency detected by the vibration sensor matches the frequency set by the frequency setting device. Yes.

  According to the above configuration, the frequency control device can control the frequency of the electromagnetic coil so that the frequency detected by the vibration sensor matches the frequency set to be maintained by the frequency setting device. That is, even if the frequency at the chute changes due to changes in environmental conditions (changes due to heat of the second elastic member, the first elastic member, etc., changes in the power supply frequency) due to the electromagnetic feeder being used for a long time, It is possible to automatically correct the vibration frequency of the chute portion to be maintained. Thereby, the electromagnetic feeder can be used stably for a longer time.

  By increasing the amplitude of the chute without widening the gap between the electromagnetic coil and the magnetic material, the electromagnetic speed can be increased while the conveyance speed of the conveyance object is increased or the power consumption can be reduced while the conveyance speed of the conveyance object remains unchanged. A method feeder can be provided.

It is a sectional side view of the electromagnetic feeder which concerns on this embodiment. It is a back sectional view of the electromagnetic system feeder concerning this embodiment. It is a top view of the electromagnetic system feeder which concerns on this embodiment. It is a side view of the electromagnetic system feeder which concerns on this embodiment. It is a block diagram explaining the alternating current inverter in the electromagnetic system feeder which concerns on this embodiment. It is a graph showing the change of the amplitude at the time of vibration of the 1st vibrator, the 2nd vibrator, and the 3rd vibrator concerning this embodiment. It is explanatory drawing which represented typically the motion at the time of the vibration of the 1st vibrating body which concerns on this embodiment, 1st elastic rubber, 2nd vibrating body, 2nd elastic rubber, and a 3rd vibrating body.

(Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a side sectional view of an electromagnetic feeder 1 according to this embodiment. FIG. 2 is a back sectional view of the electromagnetic feeder 1 according to the present embodiment. FIG. 3 is a top view of the electromagnetic feeder 1 according to the present embodiment. FIG. 4 is a side view of the electromagnetic feeder 1 according to the present embodiment. FIG. 5 is a block diagram for explaining the AC inverter 50 in the electromagnetic feeder 1 according to the present embodiment. FIG. 6 is a graph showing changes in amplitude during vibration of the first vibrating body 21, the second vibrating body 22, and the third vibrating body 24 according to the present embodiment. FIG. 7 schematically illustrates the movements of the first vibrating body 21, the first elastic rubber 23, the second vibrating body 22, the second elastic rubber 25, and the third vibrating body 24 according to the present embodiment during vibration. FIG.

(Configuration of electromagnetic feeder 1)
The electromagnetic feeder 1 includes a chute 2 serving as a conveyance path for the potato chips C that are objects to be conveyed, a gantry 5 installed on the floor F, and an anti-vibration rubber 4 (vibration proofing member) provided on the gantry 5. ) And the first support frame 3 that connects the vibration mechanism 20 and the chute portion 2 to each other.

  As shown in FIGS. 2 and 3, the chute portion 2 has a U-shape having a floor surface 2 a and a side surface 2 b in a cross-sectional view. And as shown in FIG. 1, the angle | corner which the floor surface 2a of the chute | shoot part 2 and the horizontal surface make can be set between 0 degrees-3 degrees. In this embodiment, the angle is set to 2 °. This plays the role of adjustment at the time of connecting with other conveyance devices including the electromagnetic feeder 1.

  Moreover, as shown in FIG. 4, the side surface 2b of the chute | shoot part 2 and the 1st support frame 3 are welded and connected by the welding location 3d. This chute part 2 becomes a conveyance path for the potato chips C, and the potato chips C move in the conveyance direction W on the floor surface 2 a by the vibration of the chute part 2.

  As shown in FIGS. 1 to 4, the gantry 5 is installed on the floor F so as to bridge the two first square pipes 6 made of iron and the two first square pipes 6. Two iron second square pipes 7 arranged, a first support base 8 arranged on the two second square pipes 7, and two support plates arranged in the center of the first support base 9, a second support frame 10 fixed to the two support plates 9 by bolts 11 and inclined in the back floor direction H in a side view, and a second support frame 10 disposed on the inclined surface of the second support frame 10. A support base 12 is used. Then, four columnar vibration-proof rubbers 4 are arranged on the upper surface 12 a of the second support 12. The gantry 5 can freely adjust the height of the support plate 9 and the fixing angle between the support plate 9 and the second support frame 10. In the present embodiment, the angle formed between the second support base 12 and the horizontal plane can be adjusted between 18 ° and 23 ° by adjusting the fixing angle between the support plate 9 and the second support frame 10. And in this embodiment, as shown in FIG. 1, the angle | corner which the 2nd support stand 12 and the horizontal surface make is set to 20 degrees.

  As shown in FIG. 1, the vibration mechanism 20 is made of aluminum and disposed on the four anti-vibration rubbers 4 and is disposed above the first vibration body. The vibration mechanism 20 is disposed on the upper surface 22a. A plate-like second vibrating body 22 having a projection 28 at the center portion, and 12 (four rows and three columns) first elastic rubbers 23 (first row) connecting the first vibrating body 21 and the second vibrating body 22. An elastic member), a plate-like third vibrating body 24 disposed above the second vibrating body 22 and having an opening 24c in the center portion, and the second vibrating body 22 and the third vibrating body 24 are connected to each other. Pieces (6 rows and 3 columns) of second elastic rubber 25 (second elastic member), an electromagnetic coil 27 fixed to an electromagnetic coil support plate 26 attached to the opening 24c of the third vibrating body 24, and the electromagnetic coil 27 attached to the protrusion 28 so as to face the gap 27 with a predetermined gap G. It is constituted by the body 29. Further, three screw holes 21 d for passing the bolts 31 are provided on the side surface 21 c of the first vibrating body 21. In this embodiment, the gap G between the electromagnetic coil 27 and the magnetic body 29 is set to 3 mm.

  Here, the first elastic rubber 23 and the second elastic rubber 25 have the same shape and the same rigidity, and are formed of a cylindrical rubber having elasticity (this embodiment). So, we use a round vibration-proof rubber, which is a commercial product made by Kurashiki Rubber). Then, a total of twelve first elastic rubbers 23 are used to connect the first vibrating body 21 and the second vibrating body 22, and the second vibrating body 22 and the third vibrating body 24 are connected to each other by the second. By using a total of 18 elastic rubbers 25, the overall rigidity using a total of 12 first elastic rubbers 23 is set smaller than the overall rigidity using a total of 18 second elastic rubbers 25. is doing. That is, by using the same rubber for the first elastic rubber 23 and the second elastic rubber 25, the number of rubbers used as the first elastic rubber 23 is less than the number of rubbers used as the second elastic rubber 25. Thus, the rigidity can be reduced.

  The first support frame 3 connects and supports the vibration mechanism 20 and the chute part 2. As shown in FIG. 4, the upper end portion 3e of the first support frame 3 and the side surface 2b of the chute portion 2 are fixed by welding at a welding location 3d. Further, the first vibrating body 21 and the first support frame 3 are fixed by passing bolts 31 through screw holes 21 d provided in the side surface 21 c of the first vibrating body 21.

  Each component of the electromagnetic feeder 1 includes a center of gravity position (referred to as an upper center of gravity position) including the chute portion 2, the first support frame 3, and the first vibrating body 21, and second vibrating bodies 22 and 18. The center of gravity (including the lower center of gravity) including the second elastic rubber 25, the electromagnetic coil support plate 26, the electromagnetic coil 27, the protrusion 28, and the magnetic body 29 coincides or is disposed at a position close to the coincidence point. Has been. Here, the position close to the coincidence point where the upper gravity center position and the lower gravity center position coincide with each other means a position whose radius is within 10% of the height of the electromagnetic feeder 1 from the coincidence point.

  The total weight of the third vibrating body 24, the electromagnetic coil support plate 26, the electromagnetic coil 27, the second vibrating body 22, the second elastic rubber 25, the protrusion 28, and the magnetic body 29 is the total weight. -It is set to be heavier than the total weight of the total weight of the first support frame 3 and the first vibrating body 21.

(Operation of electromagnetic feeder 1)
Next, the operation of the electromagnetic feeder 1 will be described. FIG. 6 is a graph showing changes in amplitude during vibration of the first vibrating body 21, the second vibrating body 22, and the third vibrating body 24. The abscissa indicates the scale for each 1/4 period (phase 90 °) in time (T). The vertical axis is the amplitude. FIG. 7 is an explanatory view schematically showing the movement of the first vibrating body 21, the first elastic rubber 23, the second vibrating body 22, the second elastic rubber 25 and the third vibrating body 24 during vibration.

  First, an electromagnetic coil from a power source (not shown) is set so that the frequency generated by the electromagnetic force acting between the electromagnetic coil 27 and the magnetic body 29 becomes the natural frequency of the entire electromagnetic feeder 1 or a frequency close to this natural frequency. 27 is supplied with an alternating current of frequency f intermittently. The amplitude generated at this time is 2 mm, which is smaller than the gap G (3 mm) between the electromagnetic coil 27 and the magnetic body 29. The frequency f of the alternating current that is intermittently supplied to the electromagnetic coil 27 is 20 Hz. That is, the period is 0.05 s.

  When an alternating current is applied to the electromagnetic coil 27, the electromagnetic coil 27 and the magnetic body 29 are attracted to each other, so that the second vibrating body 22 moves in the back floor direction H, and the third vibrating body 24 moves in the back floor direction H. Moves in the opposite direction. On the other hand, at the time of de-energization, the second vibrating body 22 moves in the direction opposite to the back floor direction H by the restoring force of the second elastic rubber 25, and the third vibrating body 24 moves in the back floor direction H. Accordingly, the third vibrating body 24 and the second vibrating body 22 are given a phase difference of 180 ° (see the line segment 61 and the line segment 62 in FIG. 6), and the third vibrating body 24 and the second vibrating body 22 are Can be vibrated in conjunction with each other. At this time, the amplitude in the second vibrating body 22 is amplified to about 1.4 times the amplitude in the third vibrating body 24 (see a line segment 62 in FIG. 6).

  And the 1st vibrating body 21 is vibrated by the vibration which the 3rd vibrating body 24 and the 2nd vibrating body 22 which have this phase difference of 180 degrees via the 1st elastic rubber 23. At this time, the phase of the 2nd vibrating body 22 and the 1st vibrating body 21 is shifted 180 degrees (refer the line segment 62 and the line segment 63 of FIG. 6), and the 1st vibrating body 21 is vibrated. This is because the linked vibrations of the third vibrating body 24 and the second vibrating body 22 having a phase difference of 180 ° are integrated to serve as one pendulum, and this vibration causes the chute unit 2 and the first support frame 3 to move. The 1st vibrating body 21 containing is resonated. In addition, the amplitude in the 1st vibrating body 21 is amplified about 5 times the amplitude in the 3rd vibrating body 24 (refer the line segment 63 of FIG. 6). Specifically, the amplitude is amplified to 10 mm.

  Then, the vibration of the first vibrating body 21 is transmitted to the chute 2 via the first support frame 3, so that the potato chips C on the floor surface 2 a of the chute 2 are conveyed in the conveying direction W. At this time, if the chute part 2 is viewed from the viewpoint of the potato chips C, the chute part 2 moves forward while lifting upward, and further, the chute part 2 moves backward while sinking downward. . Thereby, the potato chips C move in the transport direction W while jumping on the floor surface 2a according to the move M. Here, when the conveyance speed in the conveyance direction W of the potato chips C on the chute part 2 was actually measured, it was 15 to 20 m / min.

  Next, changes in amplitude during vibration of the first vibrating body 21, the second vibrating body 22, and the third vibrating body 24 will be described with reference to FIG. In the graph of FIG. 6, the horizontal axis is scaled every 1/4 period (phase 90 °) in time (T). The vertical axis represents the amplitude of the first vibrating body 21, the second vibrating body 22, and the third vibrating body 24 during vibration. Note that the graph of FIG. 6 is a value measured after an alternating current having a frequency f is passed through the electromagnetic coil 27 for a predetermined time.

  In the line segment 61 of the graph, the amplitude of the third vibrating body 24 when the electromagnetic coil 27 is intermittently energized with an alternating current having a frequency of 20 Hz (period 0.05 s) is 2 mm, which is smaller than the interval G (3 mm). In the line segment 62 of the graph, the vibration of the second vibrating body 22 is 180 ° out of phase with the third vibrating body 24, and the amplitude of the second vibrating body 22 is 1 of the amplitude of the third vibrating body 24. .4 times amplified to 2.8 mm. In the line segment 63 of the graph, the vibration of the first vibrating body 21 is 180 ° out of phase with the second vibrating body 22, and the amplitude of the first vibrating body 21 is 5 of the amplitude of the third vibrating body 24. Doubled to 10 mm. The amplification factor of the amplitude is adjusted by adjusting the rigidity factor (elements: diameter, thickness, number, material, etc.) of the first elastic rubber 23 and the second elastic rubber 25, the first vibrating body 21, the second vibrating body 22, It can be changed by adjusting the weights of the three vibrating bodies 24, the first support frame 3, the chute 2 and the like.

  Next, the movement of the first vibrating body 21, the first elastic rubber 23, the second vibrating body 22, the second elastic rubber 25, and the third vibrating body 24 during vibration will be described with reference to FIG. 7A is a cross-sectional view of the vibration mechanism 20 when the first vibrating body 21 swings to the maximum in the direction opposite to the back floor direction H. FIG. 7B is a cross-sectional view of the vibration mechanism 20 when the first vibrating body 21 swings to the maximum in the back floor direction H. FIG.

  As described above, the first vibrating body 21, the second vibrating body 22, and the third vibrating body 24 reciprocate in the vibration direction I in conjunction with each other via the first elastic rubber 23 and the second elastic rubber 25. At this time, the first elastic rubber 23 is set by setting the overall rigidity using 12 total first elastic rubbers 23 to be smaller than the overall rigidity using 18 total second elastic rubbers 25. The fracture surface S becomes a fulcrum around the upper portion of the first vibration body 21, the first elastic rubber 23, the second vibration body 22, the second elastic rubber 25, and the third vibration body 24 bend like a line segment J. To work. The fracture surface S is a surface that is stationary regardless of how the first vibrating body 21 moves in the vibration direction I. As a result, the amplitude of the first vibrating body 21 as a whole is amplified to 10 mm, which is five times the amplitude of the third vibrating body 24.

  According to said structure, the amplitude of the chute | shoot part 2 can be enlarged without expanding the space | interval G of the electromagnetic coil 27 and the magnetic body 29, the conveyance speed to the conveyance direction W of the potato chips C can be raised, or The power consumption can be reduced while the conveyance speed of the potato chips C remains unchanged. Further, since the gap G is not widened, an overcurrent flows through the electromagnetic coil 27 and power consumption does not increase, and the electromagnetic coil 27 is not heated and coil burning does not occur.

  Moreover, according to the said structure, the 1st elastic rubber 23 and the 2nd elastic rubber 25 are formed of the rubber | gum corresponding to the 1st elastic rubber 23 and the 2nd elastic rubber 25 by forming with the several rubber | gum which has the same shape. The rigidity can be freely set by changing the number. In other words, the rigidity can be reduced by making the number of rubbers used as the first elastic rubber 23 smaller than the number of rubbers used as the second elastic rubber 25. Further, since rubber having the same shape is used for the first elastic rubber 23 and the second elastic rubber 25, the substituteability is high and economical.

  Moreover, according to said structure, the vibration frequency transmitted to the chute | shoot part 2 is made by making the frequency generated with the electromagnetic force of the electromagnetic coil 27 into the natural frequency of the electromagnetic feeder 1 whole or a frequency close | similar to a natural frequency. The amplitude can be amplified to the maximum.

  Moreover, according to the said structure, each structural member of the electromagnetic system feeder 1 is located in the gravity center position containing the chute | shoot part 2, the 1st support frame 3, and the 1st vibrating body 21, the 2nd vibrating body 22, and 18th 18th. 2 Since the center of gravity including the elastic rubber 25, the electromagnetic coil support plate 26, the electromagnetic coil 27, the projection 28, and the magnetic body 29 coincides or is located at a position close to the coincidence point, the vibration transmitted to the chute 2 is reduced. Further uniformization can be achieved. That is, the potato chips C on the chute unit 2 can be transported at a uniform speed without stagnation.

(AC inverter for electromagnetic feeder 1)
Next, the AC inverter 50 that controls the operation of the electromagnetic feeder 1 will be described with reference to FIG. FIG. 5 is a block diagram illustrating the AC inverter 50 of the electromagnetic feeder 1.

  The AC inverter 50 includes a frequency setting device 52 and a frequency control device 53. And the vibration sensor 51 is provided in the rear part of the chute | shoot part 2 of the electromagnetic system feeder 1, and this vibration sensor 51 is connected with the control apparatus 53. FIG. The electromagnetic coil 27 of the electromagnetic feeder 1 is also connected to the control device 53. Here, for the AC inverter 50, for example, an AC single layer 200V (100V) inverter system or the like is used.

  The vibration sensor 51 is a sensor that detects the number of vibrations in the chute unit 2. The frequency setting device 52 is an input device that sets the frequency to be maintained in the chute unit 2. The frequency control device 53 controls the frequency of the electromagnetic coil 27 so that the frequency detected by the vibration sensor 51 matches the frequency set by the frequency setting device 52.

(Operation of AC inverter of electromagnetic feeder 1)
First, the electromagnetic feeder 1 and the AC inverter 50 are turned on. Then, the frequency to be maintained in the chute unit 2 is input to the frequency setting device 52 by hand. Then, the vibration sensor 51 has a chute portion due to a change in environmental conditions (elastic change due to heat of the second elastic rubber 25, the first elastic rubber 23, etc., a change in power supply frequency) due to the electromagnetic feeder 1 being used for a long time. When the frequency at 2 changes, the frequency is detected and transmitted to the frequency controller 53. Then, the frequency of the electromagnetic coil 27 is controlled to increase or decrease so that the frequency detected by the vibration sensor 51 matches the frequency set by the frequency setting device 52.

  According to the above configuration, the frequency control device 53 controls the frequency of the electromagnetic coil 27 so that the frequency detected by the vibration sensor 51 matches the frequency set by the frequency setting device 52 to be maintained. be able to. That is, the frequency at the chute unit 2 is changed due to changes in environmental conditions (elastic changes due to heat of the second elastic rubber 25, the first elastic rubber 23, etc., changes in the power supply frequency) due to the electromagnetic feeder 1 being used for a long time. Even if it changes, it can correct | amend automatically to the frequency of the chute | shoot part 2 to maintain. Thereby, the electromagnetic feeder 1 can be used stably for a longer time.

(Modification)
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  For example, the support plate 9 and the second support frame 10 may be pivotally supported by a single fixed shaft and may be tightly fixed by a fixing screw.

  In this case, the inclination of the chute part 2 can be freely set by loosening the fixing screw and rotating the second support frame 10 around the fixed axis with respect to the support plate 9. In this case, it may be configured to rotate by an electric motor.

  Further, when the electromagnetic feeder 1 is used for a long time, the second elastic rubber 25 and the first elastic rubber 23 are softened by heat and the rigidity is lowered and elastically changed to change the natural frequency of the electromagnetic feeder 1 as a whole. There is. Therefore, a cooling device (fan, cooler, or the like) may be provided around or outside the second elastic rubber 25 or the first elastic rubber 23 to cool the second elastic rubber 25 or the first elastic rubber 23.

  In this case, even when the electromagnetic feeder 1 is used for a long time, the second elastic rubber 25 and the first elastic rubber 23 are softened by heat and the rigidity is not lowered and elastically changed. The frequency can be kept constant.

  In the present embodiment, the AC inverter 50 controls the frequency of the electromagnetic coil 27 by increasing or decreasing the frequency so that the frequency detected by the vibration sensor 51 matches the frequency set by the frequency setting device 52. Playing a role. However, the present invention is not limited to this, and an amplitude sensor that detects the amplitude instead of the vibration sensor 51 by setting the amplitude of the chute unit 2 to be maintained by the frequency setting device 52 may be provided.

  In this case, control is performed by increasing or decreasing the frequency of the electromagnetic coil 27 so that the amplitude detected by the amplitude sensor matches the amplitude set by the frequency setting device 52. Thereby, the electromagnetic feeder 1 can be used stably for a longer time.

  Moreover, in this embodiment, potato chips C are used as objects to be transported, but foods such as mushrooms, soybeans, and strawberries, powdered mushrooms, sugar, salt, and solids are not limited to foods, screws, semiconductors Naturally, parts such as parts and electronic elements are also considered as objects to be conveyed.

  In this embodiment, the electromagnetic coil 27 is used as a device for generating vibration, but vibration may be generated using a piezoelectric element.

DESCRIPTION OF SYMBOLS 1 Electromagnetic feeder 2 Chute part 3 1st support frame 4 Anti-vibration rubber 21 1st vibration body 22 2nd vibration body 23 1st elastic rubber 24 3rd vibration body 25 2nd elastic rubber 27 Electromagnetic coil 29 Magnetic body C Potato chips F Floor G Interval (gap)
H Rear floor direction I Vibration direction J line segment M Move S Fracture surface W Transport direction

Claims (5)

An electromagnetic feeder that conveys a conveyance object placed on a chute by vibration due to electromagnetic force,
A first vibrating body installed on the floor via a vibration isolating member and connected to the chute;
A second vibrating body disposed above the first vibrating body;
A first elastic member connecting the first vibrating body and the second vibrating body;
A third vibrating body disposed above the second vibrating body;
A second elastic member connecting the second vibrating body and the third vibrating body;
A magnetic body and an electromagnetic coil attached between the second vibrating body and the third vibrating body;
With
The electromagnetic feeder according to claim 1, wherein the first elastic member has a rigidity smaller than that of the second elastic member.   The electromagnetic feeder according to claim 1, wherein the first elastic member and the second elastic member are formed of a plurality of rubbers having the same shape.   The electromagnetic feeder according to claim 1 or 2, wherein the frequency generated by the electromagnetic force of the electromagnetic coil is a natural frequency of the whole electromagnetic feeder or a frequency close to the natural frequency.   The position of the center of gravity including the chute portion and the first vibrating body matches the position of the center of gravity including the second vibrating body, the third vibrating body, the second elastic member, the magnetic body, and the electromagnetic coil. The electromagnetic feeder according to any one of claims 1 to 3, wherein the electromagnetic feeder is disposed at a position close thereto. A frequency setting device for setting the frequency of the chute portion to be maintained;
A vibration sensor that detects the frequency of the chute,
A frequency control device that controls the frequency of the electromagnetic coil so that the frequency detected by the vibration sensor matches the frequency set by the frequency setting device;
The electromagnetic feeder according to any one of claims 1 to 4, wherein the electromagnetic feeder is provided.