JPS6333854Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a conveyor device used when supplying paddy to a huller, and particularly relates to an improvement in a sensor used to prevent dry running of the conveyor device.

For example, when a paddy storage case is placed on the floor where a huller is installed, a conveyor device is used to transport the paddy upwards from the huller and then drop it due to its gravity and supply it to the supply port of the huller. is used. In such conveyor equipment, there is a risk of dry running if the paddy in the paddy storage case runs out during operation, so a sensor is installed to prevent dry running, and this sensor can prevent dry running. It would be convenient if a safety function was added to prevent this.

However, as shown in FIG. 1, in the case where the actuator 26a of the sensing sensor 26 is provided in a direction perpendicular to the bottom surface of the outlet section 21, culm pieces mixed in the conveyed object may be removed. Foreign matter such as straw or straw waste may get caught, resulting in false detection.

This invention attempts to prevent false detection by devising the shape and mounting posture of the actuator, and takes the following technical measures.

That is, in a conveyor device that conveys the powder-like conveyed material received at the receiving section 18 to the receiving section 15, the receiving section 15 is provided with a cylindrical outlet section 21 that is inclined diagonally downward. A sensor 40 capable of detecting the presence or absence of an object to be conveyed is provided at the outlet section 21, and the lower end of the actuator 42 of the sensor 40 is on the downstream side of the object than the upper end, and The actuator 42 is provided so as to be located near the bottom surface, and the lower end of the actuator 42 is bent in the downstream direction.

Through such means, this invention achieves the following technical effects. That is, since the outlet portion 21 is inclined, the downward pressing force of the conveyed object is increased. Since this large pressing force actuates the actuator 42, it is possible to improve the detection performance of the presence or absence of an object to be transported. Moreover, the actuator 42
Since the lower end is located closer to the flow direction of the conveyed object than the upper end and near the bottom of the outlet section 21, it can withstand not only the above-mentioned pressing force but also a small pressing force. Since detection can be performed sensitively even when the object is being transported, the effect of detecting the presence or absence of the object to be transported can be further enhanced.

Furthermore, since the lower end of the actuator 42 is bent in the downstream direction, a large sensing area for the objects to be transported can be secured, and detection is possible even when there are few objects to be transported. In addition, there is less entanglement with culm cuts, straw waste, etc., and even if entanglement occurs, it is easy to remove, so detection performance is improved. Furthermore, since the actuator 42 is provided inside the cylindrical outlet portion 21, even if the conveyed object hits the actuator 42, it will not be scattered outside the machine.

FIG. 1 is a front view showing an example of this type of conveyor device.

In FIG. 1, 1 is a motor base that supports a motor 2, 3 is a pulley fixed to the rotating shaft of the motor 2, 4 is a pulley fixed to a drive shaft 6 supported by a main bearing 5, and 7 is a pulley. Variable speed pulley device 8 and 9 are provided between variable speed pulley device 7 and pulleys 3 and 4; belt 10 is connected between variable speed pulley device 7 and pulleys 3 and 4;
1 is a belt cover, 11 is a frame that supports the motor base 1 and the main bearing 5, and 12 is a motor base 1.
A stand bar is fixed to the lower end of the stand bar, 13 is a leg base for directing the stand bar 12 vertically, and 14 is a handle for adjusting and fixing the stand bar 12 up and down with respect to the leg base 13. Also, 15
16 is a flexible tube whose one end is attached to the receiving portion 15 by a joint 17; 18 is a receiving portion provided at the other end of the tube 16; 19 is a conveyor spring housed in the spirally formed tube 16 and supported so as to be rotationally driven by the drive shaft 6; 20 is a joint 17 of the tube 16;
21 is a cylindrical outlet section attached to the bottom surface of the receiving section 15 so as to be horizontally rotatable and extending obliquely downward;
The movable outlet parts 23a and 23b, which are formed in a cylindrical shape with a slightly larger diameter than the outlet part 21 and are slidably attached to the outer periphery of the outlet part 21, are provided in the sliding gap between the outlet part 21 and the movable outlet part 22. Sliding rubber, 24
Similarly, numerals a and 24b are sponge-like dustproof bodies made of soft polyurethane foam. 25 is a full sensor installed in the outlet section 21 to detect whether or not the paddy is full when the huller is stopped or the next time the shutter is closed, which will be described later; This detection sensor is provided at the outlet section 21 to detect the presence or absence of paddy being transported, and this sensor 26 has an actuator 26a that moves from the solid line position shown in the figure to the broken line position when the paddy is being conveyed. It turns on when pushed up, and turns off when it is in the solid line position. The motor 2 is configured to rotate for a predetermined period of time even if the actuator 26a is at the solid line position when the motor 2 is activated. The actuator 26a is formed in a rectangular shape within the conveyance path of the outlet portion 21 and is supported in a direction substantially perpendicular to the conveyance direction.

In addition, 27 is a huller having a supply port 28;
9 is a tank section provided in front of the supply port 28;
0 is a shutter for opening and closing the supply port 28, 31
is a storage case in which dried paddy is stored as an object to be transported. This storage case 31 is installed at almost the same height as the huller 27, and a receiving part 18 provided at the tip of the tube 16 is arranged at the bottom thereof. 22 is arranged.

In such a configuration, when the motor 2 rotates, the drive shaft 6 rotates via the belt mechanism, thereby rotationally driving the conveyor spring 19. When the conveyor spring 19 rotates, the paddy stored in the storage case 31 enters the tube 16 from the receiving part 18, and then
The material rises spirally into the tube 16 and is conveyed to the receiving section 15. The paddy that has entered the receiving section 15 falls into the tank section 29 through the outlet section 21 and the movable outlet section 22 due to its gravity. When the shutter 30 is moved upward to open the supply port 28, the paddy that has entered the tank portion 29 is supplied to the huller 27 through the supply port 28. In this case, it is necessary to correctly position the conveyor device with respect to the huller 27 in order to ensure that the paddy discharged from the movable outlet section 22 enters the tank section 29 without spilling. For this reason, the footrest 13
After setting up the stand bar 1 in approximately the correct position,
2 using the handle 14, rotating the outlet part 21 horizontally with respect to the receiving part 15, and slidingly expanding and contracting the movable outlet part 22 with respect to the outlet part 21, Ensure that the opening of the movable outlet section 22 is correctly located at the top of the tank section 29.

Next, the operation of the variable speed pulley device will be explained in more detail with reference to FIG.

FIG. 2 is a structural diagram of the variable speed pulley device. In the figure, 7a is a pulley that engages with the belt 8;
b is a pulley piece concentrically fixed to the pulley 7a by the connecting shaft 7c, and 7d is a set of pulleys that are attached to the connecting shaft 7c so as to be movable in the axial direction and engage with the belt 9 together with the pulley piece 7b. The constituent pulley piece 7e is a spring that biases the pulley piece 7d toward the pulley piece 7b. The rotation of the motor 2 is transmitted to the pulley 7a via the pulley 3 and belt 8, and the pulley pieces 7b, which rotate together with the pulley 7a,
When the load applied to the drive shaft 6 transmitted from 7d to the drive shaft 6 via the belt 9 and the pulley 4 is light, the force with which the belt 9 engages with the pulley pieces 7b and 7d is relatively small, so the pulley piece 7d The belt 9 approaches the pulley 7b by the force of the spring 7e, and the belt 9 approaches the pulley piece 7.
b, 7d and near their outer periphery. but,
When the load on the drive shaft 6 becomes heavier, the force with which the belt 9 engages with the pulleys 7b and 7d increases, so the pulley piece 7d resists the spring 7e and separates from the pulley piece 7b, causing the pulley pieces 7b and 7d of the belt 9 to separate from the pulley piece 7b.
The engagement position relative to the center moves toward the center. As a result, the rotation transmission ratio from the motor 2 to the drive shaft 6 increases, the rotation speed of the drive shaft 6 decreases, and the torque increases. Therefore, if the tube 16 is clogged with paddy, making it difficult for the conveyor spring 19 to rotate and increasing the load on the drive shaft 6, the torque of the drive shaft 6 will increase, and the speed of the paddy conveyance action will slow down. continues without stopping.

FIG. 3 is a partially cutaway sectional view of the main structure of an embodiment of the conveyor device according to the present invention. Here, the same reference numerals as in FIG. 1 indicate the same or corresponding parts. In this embodiment, a detection sensor 40 for preventing dry running is arranged near the fullness sensor 25 of the outlet section 21 attached to the receiving section (see Fig. 1), and this detection sensor 40 serves as a sensor body. It consists of a micro switch 41, an actuator 42, and a dustproof cover 43. Micro switch 41
is a case 4 attached to the outside of the outlet section 21;
It is housed within 4. The actuator 42 is
It is composed of a switch drive section 45 that drives the micro switch 41 and a detection section 46 having a rectangular shape. has been done. And the switch drive section 45
is supported in a direction substantially perpendicular to the direction of inclination of the outlet section 21 by a dustproof cover 43 whose one end is fixed to the case 44 and protrudes into the conveyance path of the outlet section 21 through the hole 47. One end 45a thereof is bent so as to drive the micro switch 41, and the other end 45b is bent so as to be exposed from the tip of the dustproof cover 43 and oriented substantially vertically. Further, the upper end of the detecting section 46 is integrally attached to the other end 45b of the switch driving section so that the detecting section 46 can hang down in a substantially vertical direction, and the lower end of the detecting section 46 is curved in the flow direction of the transported object. The outlet portion 21 is formed so as to be in contact with the bottom surface of the outlet portion 21. In this case, the dustproof cover 43
is selected from a material whose load changes little depending on the operating angle of the actuator 42, that is, the detection section 46, and is made of, for example, flexible rubber.

In the conveyor device configured in this way,
As shown in FIG. 3, in the case of normal operation in which paddy A is conveyed by a predetermined amount in the direction of the arrow shown in the figure along the bottom surface of the outlet section 21, the paddy A causes the actuator 42 to
When the detection part 46 of the switch is displaced from the neutral position by the operating angle θa, the switch drive part 45 moves to its bearing 48.
It rotates around , following the changed position of the detection section 46 . At this time, the switch driving section 45 rotates around its bearing 48 in accordance with the amount of displacement of the detecting section 46 . At this time, when the micro switch 41 is driven by the switch driving section 45, the switch 41 is turned on and the sensing sensor 40 is turned on. On the other hand, when the conveyance amount of paddy A gradually decreases in the process of conveying the paddy A and the detecting section 46 of the actuator 42 is displaced to the operating angle θb, the switch driving section 45 disables the micro switch 41. 41 is turned off, and the sensing sensor 40 is turned off. In addition, also in this case,
The motor 2 rotates for a predetermined period of time. Therefore, in connection with the on/off operation of the sensing sensor 40, the motor 2
By controlling on/off (see Figure 1),
In the same way as before, dry running of the conveyor device can be prevented.

As described above, according to the above embodiment, the actuator 4 constituting the detection sensor 40 for preventing dry running
By hanging the actuator 2 in a substantially vertical direction, dust and straw debris mixed in the rice conveyed into the outlet section 21 becomes difficult to adhere to the actuator 42, and the detection sensor 40 is made to hang down in a substantially vertical direction. Malfunctions can be significantly reduced, and sensor design becomes easier. Further, since the main body of the sensor such as the micro switch 41 is protected by the dustproof cover 43, maintenance is facilitated, and the reliability of the automatic safety device can be improved.

Note that the present invention is not limited to the above-mentioned embodiment, but as shown in FIG. You can also

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a conventional conveyor device, FIG. 2 is a structural diagram of the variable speed pulley device shown in FIG. FIG. 4 is a sectional view of a main part showing another embodiment of the present invention. 15 is a receiving section, 18 is a receiving section, 21 is an exit section,
40 is a sensing sensor, and 42 is an actuator.

Claims (1)

[Scope of utility model registration request] In a conveyor device that conveys powder and granular objects received at the receiving section 18 to the receiving section 15, the receiving section 15 is provided with a cylindrical outlet section 21 that is inclined diagonally downward; A sensor 40 capable of detecting the presence or absence of an object to be conveyed is provided at the outlet section 21, and the lower end of the actuator 42 of the sensor 40 is on the downstream side of the object than the upper end, and the bottom surface of the outlet section 21 A conveyor device is provided to be located nearby, and the lower end of the actuator 42 is bent toward the downstream direction.