JPS6153282B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a feeding device for regularly arranging randomly stored cylindrical objects (for example, roller chain pins, bushes, rollers, etc.) and sending them to the next process.

For example, in order to automatically perform assembly in an assembly machine, etc., each part to be assembled must first be automatically supplied to each work station of the assembly machine. In recent years, a hopper feeder (a type of parts feeder) equipped with a funnel-shaped ball for storing the parts has been widely used as a feeding device for each of these parts. It consists of three functions, and those that utilize vibration, rocking, rotation, etc. are often used. However, (1) The action of the electromagnet gives vertical vibration to the bowl storing parts, and also gives rotational motion, and these combined vibrations create an upward slope spiraling from the bottom of the bowl. The vibrating hopper feeder, which moves the hopper toward the exit, is good for handling relatively small parts, but is not suitable for large parts, and also produces a lot of noise, especially when it comes to large parts. Furthermore, since the quantity to be conveyed is small, there is a certain limit even if the vibration is increased.
Furthermore, it is often impossible to transport the product due to adhesion of oil or the like.

(2) In addition, the swinging hopper feeder, which scoops up and sorts parts with an intermediate plate that swings in a parts storage tank, and sends out the parts in the correct position from the outlet, generally uses parts with heads, such as screws, It is limited to bolts, rivets, etc.

(3) In addition, the rotary hopper feeder uses an impeller with several blades to pass through the pool of parts in the storage tank, stirring up the parts and feeding only those in the correct position from the outlet. and diameter ratio of 1.5 to 4.5 is suitable, other ranges remain problematic.

Therefore, since the feeding device according to the present invention is a cylindrical object, it prevents the generation of vibration and noise and achieves the intended purpose at a higher speed, regardless of its size and shape. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

(Embodiment) The cylindrical object feeding device according to the present invention includes a screw shaft 12 in which a screw groove 11 is turned to fit the diameter of the cylindrical object 13 to be transported, and a bowl 14 in which cylindrical objects to be transported are randomly stored. , cylindrical object 1
3 to easily enter into the screw groove 11, and an in-bowl shielding plate 2.
1. Cylindrical object 13 parallel to screw shaft 12
A guide 15 is provided along the screw groove 11 to the extent that it can be held and automatically rotated, and a guiding guide 1 for guiding the orderly arranged cylindrical objects 13 to the next step.
6. Furthermore, a pulley 17 for rotating the screw shaft 12, a belt 18 for power transmission,
It is constituted by a bearing 19 of the screw shaft 12. (Figure 1).

The operation of the feeding device is such that the cylindrical object 13 stored in the bowl 14 enters the screw groove 11 of the screw shaft 12 rotating at a constant speed, and moves along the screw groove 11 to the exit side (second
(left side in the figure). It does not matter whether the screw groove 11 is on the left or right side in the spiral direction,
When the screw groove 11 is turned into a right-handed thread in the screw shaft 12 (Fig. 1), the screw shaft 12 must be rotated to the left toward the exit side, and the guide 15 must be rotated to the left. It is necessary to install the

By the way, one end of the screw shaft 12 provided with the screw groove 11 is connected to the cylindrical objects 13, 13...
Even if you put it in a storage bowl and rotate it,
Although the cylindrical object 13 cannot enter the screw groove 11, the present invention has a major feature in that the cylindrical object 13 can enter the screw groove 11 correctly. In the following, a configuration for inserting cylindrical objects 13 randomly stored in the bowl 14 into the screw groove 11 of the screw shaft 12 will be explained (see FIGS. 2 and 4). Screw shaft 1
2 is inserted at its end and attached with the outlet side raised slightly higher, and an in-bowl guide 20 and a shielding plate 21 are fixed to the outer periphery of the screw shaft 12 inside the bowl 14. In order to insert the cylindrical object 13 into the screw groove 11 of the screw shaft 12, the bowl inner guide 20 has an inner surface that is concentric with the center O of the screw shaft 12, and an outer diameter of the cylindrical object 13. A corresponding space 22 is formed extending approximately 90° from the upper end. Therefore, first, the cylindrical object 13a, which is substantially parallel to the screw groove 11, enters the groove 11 without any problem through the gap with the in-bowl guide 20 as the screw shaft 12 rotates.

A cylindrical object 13b that is perpendicular to the screw groove 11, that is, parallel to the screw shaft 12.
No matter how much the screw shaft 12 rotates, it will not enter the groove 11 in this state.
However, the cylindrical object 13b, which is parallel to the screw shaft 12, does not enter into the screw groove 11 due to the rotation of the screw shaft 12, but is moved toward the exit, and becomes the state 13c.

The in-bowl guide 20 has a step on its upper end surface, and the cylindrical member 13b, which is parallel to the screw shaft 12, is tilted to a state like 13c so that it can be inserted into the screw groove 11. There is. The cylindrical object 13 inserted into the screw groove 11 hits the bottom 23 of the in-bowl guide guide 20 and moves in that state as the screw shaft 12 rotates, so that the in-bowl guide guide 20
The guide 15 is connected to the guide 15. FIG. 5 shows the in-bowl guide 20 and the guide 15 independently, and as seen in the figure, the guide 15 and the in-bowl guide 20 are connected as a single body. Furthermore, the screw shaft 12 has an exit side that is highly inclined, and the cylindrical object 13 that has been inserted into the same screw groove 11 more than necessary or the cylindrical object 1 that has risen as the screw shaft 12 rotates.
3 rolls down at a certain position and returns into the bowl 14. Further, due to the rotation of the screw shaft 12, a downward force acts on the cylindrical object 13 conveyed along the screw groove 11 due to friction between the two, and a repulsive force is generated to balance this force. As shown in FIG. 3, the guide 15 has a notch that can hold the outer surface and bottom surface of the cylindrical object, and furthermore, a force in the feeding direction acts from the side surface of the screw groove 11, and the above-mentioned The screw shaft 12 is rotated and fed along the guide 15. Therefore, in order to reduce the frictional force caused by the rotation of the screw shaft 12,
The shape of the screw groove 11 corresponds to the shape of the cylindrical object 13 to be conveyed.
Better results can be obtained by making a point contact with a slightly different diameter than by making a line contact between the two, where the diameter is exactly the same as that of the two. Moreover, cylindrical object 1
3, the frictional force with the screw groove 11 and the guide 1
Due to the repulsive force with the guide 15 and the screw groove 11, a force is always generated regardless of the size, so if the force causes the cylindrical object 13 to rotate and there is a possibility that galling may occur between the guide 15 and the screw groove 11, In particular, when the diameter of the cylindrical object 13 is relatively large compared to its height, the cylindrical object 1
By supplementing a guide such as a spring wire (not shown) along the upper surface of the guide 15 in parallel with the guide 15, the above-mentioned force can be canceled.

On the other hand, the cylindrical object 13 conveyed by the feeding device
It does not have to be a perfect cylinder; it is okay to have notches in one or several places, and it does not have to be completely solid; even if it is pipe-shaped, it can have a bottom. It is also possible to use a cylindrical object 13 (cup-shaped by drawing) or a cylindrical object 13 with one end rounded.

The feeding device for the cylindrical object 13 according to the present invention has the configuration described above, and can mainly obtain the following effects.

(Effects) (1) The size of the cylindrical object conveyed by the feeding device according to the present invention has a much wider range than that of conventional feeding devices, and the size of the screw shaft diameter and the screw groove size can vary widely. The size and pitch can be used according to the size of the cylindrical object,
Furthermore, even if the diameter of the cylindrical object is considerably larger than its height, by guiding the upper surface of the cylindrical object with a wire as described above, it is possible to cancel out the force generated.

(2) Also, the quantity transported by this device is extremely large. In this system, the cylindrical objects stored randomly in the bowl are guided into the screw groove of the screw shaft by the guide in the bowl, and once they enter the screw groove, they are forcibly sent out along the screw groove to the exit side. Therefore, the conveyance amount can be easily increased in proportion to the number of rotations of the screw shaft without being unable to feed due to adhesion of oil or the like.

(3) The torque required to rotate the screw shaft in this device is due to the friction between the cylindrical object stored in the bowl and the screw shaft, and the friction between the cylindrical object that has entered the screw groove and is being transported and the screw shaft. This is necessary due to the friction in the bearings, as well as the friction in the bearings, which is necessary for conventional vibrating hopper feeders that vibrate the entire storage bowl and rotating hopper feeders that stir the inside of the storage bowl. Energy consumption is very low compared to Eider etc.

(4) Furthermore, this device can deliver cylindrical objects very quietly without collisions with delivery parts or vibration of the device.

The main effects have been listed above, but by using the principles of the present invention, it is possible to not only deliver conventionally used powder and granular materials, but also to improve the delivery of general rigid bodies by devising the shape of the screw groove. sending out,
This is a very useful invention that can be applied to transportation.

[Brief explanation of the drawing]

1 to 4 show a cylindrical object feeding device according to the present invention, FIG. 1 is a perspective view thereof, FIG. 2 is a plan view thereof, and FIG. 3 is a view showing A in FIG. 2. -A cross section, and FIG. 4 shows a B-B cross section in FIG. 2. Furthermore, FIG. 5 shows the in-bowl guide and the guide independently. 11... Screw groove, 12... Screw shaft, 13... Cylindrical object, 14... Bowl, 15
... Guide, 16 ... Induction guide, 20 ... Inner bowl guide, 21 ... Shielding plate, 22 ... Space, 23 ... Bottom.

Claims (1)

[Claims] 1 A notch parallel to the side surface of a screw shaft having a spiral groove with a radius of curvature that is approximately the same as the radius of the cylindrical object, and whose cross section can hold the outer surface and bottom surface of the cylindrical object. A guide is provided, the exit side of the screw shaft is inclined high, and one end is inserted into a bowl that serves as a storage container for cylindrical objects, and the cylindrical objects stored in the bowl are inserted into the bottom of the bowl using a screw shaft. An in-bowl guide is provided to guide the screw into the screw groove of the shaft. A space large enough to accommodate the cylindrical object to be conveyed is formed between the screw shaft and extends approximately 90 degrees from the upper end of the screw shaft, and the upper end is shaped like a step in the axial direction of the screw shaft. By aligning the bottom of the in-bowl guide with the bottom of the guide,
A feeding device for a cylindrical object, characterized in that the cylindrical object entered into a screw groove of a screw shaft by the in-bowl guide is regularly sent out along the guide by rotation of the screw shaft.