JP2864289B2 - Link drive of horizontal rotary transfer device using equilateral triangle rotor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pair of polygonal rotors each rotating around a vertical axis, and a link connected in an endless belt shape is erected on a horizontal plane. The present invention relates to a horizontally rotating transfer device for moving, and more particularly, to a link drive device in the above-described device in which a rotor has a regular triangular shape.

[Conventional technology]

The applicant of the present application has filed Japanese Patent Application No.
FIG. 4 is a plan view showing a schematic configuration of a horizontal rotary transfer device using a pair of equilateral triangular rotors in an embodiment described in the specification of the earlier application. FIG.

A pair of rotors (01) formed in an equilateral triangle having the same dimensions are paired with a pair of rotating shafts (0) vertically supported at required intervals.
2), and are synchronously rotated with the same phase by appropriate driving means.

Link of unit length corresponding to the side length of rotor (01) (0
3), a row of links sequentially pivoted at the joint (04) is mounted by winding a pair of rotors (01), and a transfer pallet (05) is attached to the link (03) with an appropriate pitch. Then, when each rotor (01) is rotationally driven, each link (03) travels around a pair of rotors (01) to transfer the pallet (05).

[Problems to be solved by the invention]

The apparatus shown in FIG. 4 has an advantage that the unit length of the link (03) with respect to the size of the rotor (01) can be considerably increased, so that a large pallet (05) can be stably transferred. On the other hand, pulsation occurs in which the traveling speed of the link (03) periodically increases and decreases.

That is, since the distance (R) from the rotation center of the rotor (01) to the vertex of the equilateral triangle and the distance (r) from the side are not equal, when the rotor (01) is rotated at a constant speed, The speed ratio of the traveling speeds of the left and right link trains in FIG. 4 is R / r. Since R = 2r in the equilateral triangle, the speed of the link row on the left side in the state of FIG.
It is twice the speed of the right row of links. On the other hand, when the pair of rotors (01) is rotated by 60 degrees from the position shown in FIG. 4, the speed of the right link row is twice the speed of the left link row.

Therefore, the traveling speed of each link train is equal to the rotor (0
With a cycle of 1/3 rotation of 1), pulsation occurs in which the fluctuation ratio between the high speed and the low speed is 2: 1. Such pulsation imposes a heavy load on the rotating shaft and the driving source of the rotor (01), and causes a failure.

The drive of the link row is independent of the rotation of the rotor (01).
In order to drive one link row at a constant speed by driving the link row directly by some means, and to reduce the load on the rotor (01), the high and low speeds of the other driven link row are reduced. The ratio is amplified to 4: 1, causing large pulsations and potentially damaging the joint (04).

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems in a horizontal rotary transfer device using an equilateral triangular rotor, and to provide a link drive device in which link rows on both sides can run stably.

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention is configured as follows.

A pair of rotors (11) attached to a pair of right and left vertical shafts (12) and forming an equilateral triangle having the same dimensions, and a link (13) having a unit length corresponding to the side length of the rotor (1)
A link drive device of a horizontal rotary transfer device that is mounted with an endless link row sequentially connected by an articulating pin (14), and is made to travel around the link. A pair of sprockets ( 16a) (17a) (16b) (17B) A pair of endless chains, in which engaging pieces (18) that engage with the joint pins (14) of the link row are attached at a pitch that matches the link unit length. (15
a) (15b) and a pair of sprockets (16a) (16b) having endless chains (15a) (15b) mounted on a common axis so as to be driven via transmission means, respectively. A differential gear device (24) that connects a pair of drive shafts (22a) (22b) and a pair of drive shafts (22a) (22b) to be rotatable at the same speed and at different speeds.
And a pair of drive shafts (22a) (22b) and a differential gear device (24)
And a driving device (26) driven through a link, a link driving device of a horizontal rotary transfer device using an equilateral triangular rotor.

To transmit the movement of the endless chain (15a) (15b) to the link row, one end of the joint pin (14) protrudes from the surface of the link row, and the engagement attached to the endless chain (15a) (15b) It is preferable that the link (18) is configured to travel and drive the link row by contacting and pressing the projecting portion of the joint pin (14).

In this case, the engagement piece (18) corresponding to each joint pin (14)
It is preferable that two sets are set as one set and a plurality of sets are mounted at a pitch corresponding to the link unit length, and the joint pin (14) is sandwiched between the engagement pieces (18) of each set.

[Action]

When a pair of drive shafts (22a) and (22b) are driven to rotate by a drive device (26) via a differential gear device (24), sprockets (16a) and (16b) rotate and a pair of endless chains are rotated. (15a) and (15b) drive along the corresponding row of links,
The engagement pieces (18) attached to the chains (15a) (15b) are sequentially engaged with the joint pins (14) of the link rows, and the link rows are driven by the endless chains (15a) (15b). Let it run.

At this time, if a difference occurs in the traveling speed between the link rows on both sides due to the angular position of the equilateral triangular rotor (11), the function of the differential gear device (24) causes the pair of drive shafts (22a) (22
b) rotates relatively, automatically absorbs the speed difference between both sides, and performs stable transfer.

In order to transmit the drive of the endless chain (15a) (15b) to the link row, an engagement piece (18) is attached to the endless chain (15a) (15b) at a pitch that matches the link unit length. The link row is driven by the endless chain (15a) (15b) by being pressed against the joint pin (14).

When the two sets of the engaging pieces (18) are attached to each other and the joint pin (14) is clamped between them, the link row can be transferred in both forward and reverse directions.

〔Example〕

FIG. 1 is a plan view of a horizontal rotary transfer device to which a link drive device of the present invention is applied.

A pair of equilateral triangular rotors (11) are fixedly supported on a vertical rotating shaft (12) and supported by a plurality of links (13).
An endless belt-shaped link row, which is sequentially connected by an articulating pin (14), is wound around a pair of rotors (11) and mounted. Each joint pin (14) protrudes from the upper surface of the link (13), and can be engaged with an engagement piece (18) attached to a chain (15) described later.

In the present invention, the rotor (11) is driven not to rotate but to drive the link row, and the rotating shaft (12) of each rotor (11) is driven by the rotor (11) running in the link row. It is freely rotatably supported so that it can rotate following the rotation.

Hereinafter, for convenience of explanation, the lower part in FIG. 1 is referred to as a “front side” and the upper part is referred to as a “rear side”. , And those on the rear side are indicated by (b).

An endless chain for driving is mounted along each of the two front and rear link rows. The front chain (15a) is mounted on a driving sprocket (16a) (this sprocket is not shown in FIG. 1) and a driven sprocket (17a), and the rear chain (15b) is similarly driven. By mounting on the side sprocket (16a) and the driven side sprocket (17b),
Each is configured to rotate in a horizontal plane.

The two chains (15a) and (15b) are erected at positions where the rear rows are close to or slightly overlap with the corresponding link rows, and the pitch of the articulating pins (14) of the link rows. A plurality of pairs of engaging pieces (18) are mounted at intervals corresponding to (effective length of the link (13)).

The pair of engaging pieces (18) are attached at an interval having an appropriate margin with respect to the diameter of the joint pin (14), and a link row is provided between each pair of engaging pieces (18). The joint pin (14) is pinched to move.

Drive side sprocket (16a) (16b) shaft (19a) (19
b) is extended downward and the bevel gear (20a) (20
b) is fixed, and the sprockets (16a) (16b)
Each is designed to rotate integrally with the large bevel gears (20a) (20b).

FIG. 2 is a perspective view showing a main part of a drive device of the front chain (15a). A small bevel gear (21a) fixed to a drive shaft (22a) facing rearward has a large bevel gear (20a) on the front side. Are engaged. The rear bevel gear (20b) has a small bevel gear (21) fixed to the drive shaft (22b) facing forward, symmetrically with the front side.
b) is engaged.

The front and rear drive shafts (22a) and (22b) are supported on the same axis by bearings (23a) and (23b), respectively, and are connected via a differential gear device (24).

A sprocket (25) concentric with the drive shaft (22a) is fixed to the front of the differential gear unit (24), and a chain (27) is installed between the sprocket and the output shaft of the drive motor (26). I have.

FIG. 3 is a sectional plan view showing the differential gear device (24).
The configuration is similar to that of a differential gear device in a known vehicle drive device.

Cylindrical hollow gear box with axis pointing in the front-back direction (28)
The front drive shaft (22a) is inserted from the front side and the rear drive shaft (22b) is inserted from the rear side into the large bevel gear (2).
9a) (29b) and each drive shaft (22a) inside the gear box (28)
(22b), a pair of small bevel gears (30) (30)
Shaft (31), which is supported on the cylindrical peripheral surface of the gear box (28)
With (31), it is installed orthogonal to the axis of the drive shafts (22a) and (22b), and four bevel gears are meshed with each other.

As described above, the sprocket (25) is fixed to the front surface of the gear box (28) concentrically with the drive shaft (22a), and the chain (2
7) is mounted.

The operation of the above-structured link drive device of the present invention is as follows.

When the motor (26) is started, the gear box (28) rotates through the chain (27) and the sprocket (25), and a pair of large umbrellas is inserted through a pair of small gears (30) and (30). Gears (29
a) (29b), drive shaft (22a) (22b) and bevel gear (21
a) Rotate (21b) integrally with the gear box (28).

The rotation of the small bevel gears (21a) (21b) is transmitted to the large bevel gears (20a) (20b) meshing symmetrically in the front-rear direction, and the sprockets (19a) ( 1
9b) is rotationally driven in directions opposite to each other, and the chains (15a) and (15b) mounted thereon are driven to travel in directions opposite to each other.

A large number of engagement pieces (18) attached to each chain (15a) (15b) are located in a region where the back row side of each chain (15a) (15b) approaches or overlaps the corresponding link row, and the joint of each link row is formed. Because pin (14) is pinched,
The front and back link trains follow the chain (15a) (15b),
Driven in opposite directions, a pair of rotors (11) (11)
Around the.

At this time, when each rotor (11) of the equilateral triangle is in the state shown in the first illustration, that is, at an angular position which is symmetrical with respect to the center line connecting the left and right rotation axes (12) and (12), Are moved at the same speed in the opposite direction, but at other angular positions, a speed difference occurs between the front and rear link rows.

In order to adjust the speed difference and smoothly drive the front and rear link rows, a differential operation gear unit (24) is provided.

When each rotor (11) is at the first illustrated angular position and the speeds of the front and rear link rows are equal, the front and rear chains (15a) (15b), sprockets (18a) (18b), and large bevel gear ( The small bevel gears (21a and 20b) mesh with the large bevel gears (20a) and (20b) because they rotate in the opposite direction at the same speed.
a) (21b) may be rotated in the same direction at a constant speed. Therefore, the large bevel gears (29a) and (29b) in the gear box (28) also rotate in the same direction at the same speed, and do not rotate relatively between the two, and are supported by the gear box (28). A pair of small bevel gears (3
0) also does not rotate.

When each rotor (11) rotates from the first illustrated angular position and the speeds of the front and rear link rows are different, the chain (15a) (15b), the sprockets (18a) (18b), the large bevel gear (20a) ) Since the rotation speed of (20b) is different, the rotation speeds of the small bevel gears (21a) (21b) and the large bevel gears (29a) (29b) are also different, and the large bevel gear (29a) in the gear box (28) is different. (29b)
Rotates relatively, and a pair of small bevel gears (30)
It rotates around and absorbs the speed difference before and after.

That is, if the gear box (28) of the differential gear unit (24) is driven to rotate at a required constant speed by the motor (26) via the chain (27) and the sprocket (25), The gears (21a) (21b) rotate together with the gear box (28), and the bevel gears (20a) (20b) and the shafts (19a) (19)
b), chain (1a) via sprocket (18a) (18b)
5a) (15b) is driven, the corresponding joint pin (14) is clamped by the engagement piece (18) attached to each chain (15a) (15b) with a required pitch, and the link row is driven to drive. Can be.

During traveling driving, the speed change occurring in the front and rear link rows based on the angular position of each rotor (11) is absorbed by the differential gear device (24), so that the driving can be performed extremely smoothly. The load on the rotor rotating shaft and the driving source in the means for rotating and driving the rotor (01) can be reduced.

In addition, in the horizontal rotation type transfer device using the equilateral triangle rotor, there is a problem that pulsation occurs in the traveling of the above-described link row and a traveling path of the link row periodically moves.

That is, in FIG. 4, the distance from the center of the rotor (01) to the vertex of the equilateral triangle is R, the distance from the center of the side is r, and R = 2r. The rotor (01) moves at a width of r with a period of 1/3 rotation.

In the apparatus shown in FIG. 1, it is necessary to configure the front and rear chains (15a) and (15b) so that the traveling route of the link train does not move.

Means for holding the traveling route of this link row in a fixed position
Since the applicant has filed a patent application at the same time (the title of the invention, "A device for correcting the running position of a link row in a horizontal rotary transfer device using an equilateral triangle rotor"), a brief description will be given here.

Each rotor (11) is installed on a movable table (33) that can be moved in the front-rear direction by a guide roller (32), and the rotating shaft (12) of the rotor (11) has a large gear (3).
4) is fixed and rotated integrally with the rotor (11). A small gear (35) meshing with the large gear (34) is supported by a vertical shaft (36) at an appropriate position on the moving table (33). The fraction ratio of both gears is 3: 1.

A crank pin (37) is erected on a small gear (35), and one end of a rod (38) is pivotally connected. The other end of the rod (38) is pivotally supported by a fixed position bearing (39). It is. The position of the crank pin (37) is set at a distance of 1 / 2r from the center of the small gear (35).

With this configuration, each time the rotor (11) makes a 1/3 rotation, the moving table (33) reciprocates with an amplitude of r in the front-rear direction so as to cancel the movement of the link train, and travels along the link train. The route can be kept constant.

As described above, the present invention has been described based on the illustrated embodiment, but the present invention is not limited to the above description, and various application modifications are possible.

For example, in the above-described embodiment, a pair of engagement sides (18) attached to the chains (15a) (15b) are attached so as to sandwich the joint pin (14). In the case of a device for transferring to a joint pin, one engagement piece (18) may be installed on the rear side of each joint pin (14).

The output of the differential gear unit (24) is connected to the sprocket (18a) (1
The means for transmitting to 8b) is not limited to the bevel gear of the illustrated embodiment.
Screw gears, crown gears and the like can also be used.

The differential gear device (24) may use a planetary gear mechanism using a spur gear in addition to the configuration using the illustrated bevel gear.

〔The invention's effect〕

(1) A differential gear device (24) absorbs a speed difference generated between link rows on both sides of a horizontal transfer device using an equilateral triangular rotor (11), and allows the link train to run stably and smoothly. Can be.

(2) Each link row is provided with a drive device for traveling, and the rotor (11) is supported in a freely rotatable manner so as to follow the movement of the link row, so that the rotor shaft (12) is excessively large. There is no burden and the risk of damage is small.

[Brief description of the drawings]

FIG. 1 is a plan view of a horizontal rotary transfer device to which the link drive device of the present invention is applied, FIG. 2 is a perspective view showing a main part of the drive device, and FIG. 3 is a sectional plan view of a differential gear device. FIG. 4 is a schematic view of a horizontal rotary transfer device using an equilateral triangular rotor. (11) Rotor, (12) Rotary axis (13) Link, (14) Joint pin (15a) (15b) Chain, (16a) (16b) (17a) (17b)
Sprocket (18) engagement piece, (19a) (19b) shaft (20a) (20b) large bevel gear, (21a) (21b) small bevel gear (22a) (22b) drive shaft, (23a) (23b) bearing (24) Differential gearing, (25) Sprocket (26) Motor, (27) Chain (28) Gear box, (29a) (29b) Large bevel gear (30) Small bevel gear, (31) Support shaft (01 ) Rotor, (02) Rotary axis (03) Link, (04) Joint (05) Pallet

Claims (3)

(57) [Claims] 1. A pair of rotors, which are rotatably mounted on a pair of right and left vertical axes and form equilateral triangles having the same size with each other, are sequentially linked with unit length links corresponding to the side lengths of the rotors by joint pins. In a link drive device of a horizontal rotary type transfer device in which a continuously provided endless link row is mounted and travels around, a link drive apparatus is installed on a pair of sprockets along a pair of link rows, respectively. The engagement piece that engages with the joint pin,
A pair of drive shafts arranged on a common axis so that at least one of a pair of endless chains attached at a pitch corresponding to the link unit length and at least one of the sprockets on which the endless chains are installed are respectively driven via transmission means. A differential gear device that rotatably couples a pair of drive shafts at the same speed and at different speeds, and a drive device that drives the pair of drive shafts via the differential gear device. Link drive device for horizontal rotation type transfer device using equilateral triangle rotor. 2. An end of an articulated pin is protruded from a surface of a link row, and an engaging piece attached to an endless chain abuts against a protruding portion of the articulated pin to push the link pin to drive the link row. A link driving device for a horizontal rotary transfer device using the equilateral triangle rotor according to claim (1). 3. A plurality of sets of engaging pieces corresponding to each joint pin are attached at a pitch corresponding to the link unit length, with two sets each as a set, and the joint pins are sandwiched between the engaging pieces of each set. A link drive device for a horizontal rotary transfer device using an equilateral triangular rotor according to claim (2).