JPH04169410A - Link driving device for horizontal rotary type transfer device in which equilateral triangular rotors are used - Google Patents

Abstract

PURPOSE:To stabilize movement of rows of links by running a pair of chains, to which engaging pieces for engaging with link hinge pins are mounted at a pitch of unit length of the links, by means of respective sprockets driven by a single differential gear so as to move respective rows of the links. CONSTITUTION:Chains 15a and 15b are driven by sprockets 16b 17a and 17b, respectively, (sprocket 16a not shown in the figure) which are turned by a motor 26, a chain 27, a differential gear 24, drive shafts 22a and 22b, large bevel gear 20a (gear on only one side is shown), and small bevel gears 21a and 21b. Engaging pieces 18 engaged with link hinge pins 14 for connecting links 13 to each other are mounted on these chains 15a and 15b at a pitch of unit length of the links 13. In the moving chains 15a and 15b, therefore, the engaging pieces 18,18 are engaged with respective link hinge pins 14 to move the links 13 smoothly and securely.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a pair of polygonal rotors rotating around vertical axes, each of which is equipped with links connected in the form of an endless belt. The present invention relates to a water hand rotary type transfer device for moving a rotor, and particularly to a link drive device in the above device in which the rotor has an equilateral triangular shape.

[Conventional technology]

The above-mentioned horizontal rotation type transfer device was developed by the applicant in Japanese Patent Application No.
The patent application was filed as No. 13700, and FIG. 4 is a plan view schematically showing the configuration of a horizontal rotation type transfer device using a pair of equilateral triangular rotors, which is an embodiment described in the specification of this earlier application. It is a diagram.

A pair of rotors (0
1), a pair of rotating shafts (02
) and are driven to rotate synchronously with the same phase by appropriate driving means.

Link (0
3), the link row which is sequentially pivoted at the joint (04) is 1
The pair of rotors (01) are wound and mounted, and the link (03
) with the transport pallets (05) mounted at appropriate pitches,
When each rotor (01) is rotationally driven, each link (03
) travels around a pair of rotors (01) and transports a pallet (05).

[Problem to be solved by the invention]

The device shown in Figure 4 has the advantage of being able to stably transport large pallets (05) because the unit length of the link (03) can be considerably increased relative to the size of the rotor (Ol). However, on the other hand, the link (03
) produces pulsations in which the running speed of the vehicle increases and decreases periodically.

In other words, the distance (R) from the center of rotation of the rotor (01) to the vertex of the equilateral triangle is not equal to the distance wl(r) to the side, so when the rotor (01) is rotated at a constant speed, , the speed ratio of the running speeds of the left and right link rows in FIG. 4 is R/r.

Since R=2r in an equilateral triangle, in the state shown in Figure 4,
The speed of the left link row is twice the speed of the right link row. When the pair of rotors (01) are each rotated 60 degrees from the position shown in FIG. 4, the speed of the link row on the right side is, on the contrary, twice the speed of the link row on the left side.

Therefore, the traveling speed of each link row is the rotor (0
With a cycle of 173 rotations in 1), pulsation occurs with a speed variation ratio of high speed and low speed of 2:1. Such pulsation places a large burden on the rotating shaft and drive source of the rotor (01), and becomes a factor that induces failure.

The drive of the link row is not based on the rotation of the rotor (01),
If you try to directly drive the link rows by some means to make one link row run at a constant speed and reduce the load on the rotor (01), the height and low speeds of the other driven link row will change. The ratio is amplified to 4:1, resulting in large pulsations that may damage the joint (04).

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems in a horizontal rotation type transfer device using an equilateral triangular rotor, and to provide a link drive device that allows both link rows to run stably.

[Means to solve the problem]

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

A pair of rotors (11) each having an equilateral triangle shape and having the same dimensions are attached to a pair of left and right vertical shafts (12), respectively.
Link (1) of unit length corresponding to the side length of rotor (11)
3), in a link drive device of a horizontal rotary transfer device in which endless link rows successively connected by joint pins (14) are mounted and run in a circular motion, one pair of each Sprocket (16a) (17a) (
16b) A pair of endless chains (15a) installed in (17B) and having engaging pieces (18) that engage with the joint pins (14) of the link row attached at a pitch that matches the link unit length.
(15b) and 5. A pair of drive shafts arranged on a common axis so as to drive at least one of the sprockets (15a) (16b) on which the endless chains (15a) (15b) are installed, respectively, via transmission means. (22a) (22b), a differential gear device (24) that rotatably connects the pair of drive shafts (22a) and (22B) at constant speed and different speeds, and the pair of drive shafts (22B). 22a) A link drive device for a horizontal rotary transfer device using an equilateral triangular rotor consisting of a drive device (26) that drives (22b) via a differential gear (24).

In order to transmit the movement of the endless chains (15a) (15b) to the link row, one end of the joint pin (14) is made to protrude from the surface of the link row, and the endless chains (15a) (15b)
It is preferable that the engagement piece (18) attached to the joint pin (14) is configured to abut and press the protrusion of the joint pin (14), thereby driving the link row to travel.

In this case, the engagement piece (18) corresponding to each joint pin (14)
), two sets each are installed at a pitch that matches the link unit length, and g! It is preferable to sandwich the 5 pin (14).

[For production]

When the drive device (26) rotates the pair of drive shafts (22a) (22b) via the differential gear device I (24), the sprockets (16a) (16b) rotate, and the pair of endless shafts rotate. The chains (15a) (15b) run along the corresponding link rows, and each chain (15a) (1
The engaging pieces (18) attached to the link row (5b) sequentially engage the joint pins (14) of the link row to connect the link row to the endless chain (
15a) (15b) to run.

At this time, if a difference occurs in the running speeds of the link rows on both sides due to the angular position of the equilateral triangular rotor (11), the differential gear system! (24), a pair of drive shafts (22a)
(22b) rotates relatively to automatically absorb the speed difference between the two sides, thereby ensuring stable transfer.

In order to transmit the drive of the endless chain (15a) (15b) to the link row, the endless chain (15a) (15b)
The engagement pieces (18) are attached at a pitch that matches the link unit length, and are brought into contact with and pressed against the protrusion of the joint pin (14) of the link row, thereby connecting the link row to the endless chain (15).
a) Follow (15b).

By attaching two engaging pieces (18) as a set and sandwiching the joint pin (14) between them, the link row can be moved in both forward and reverse directions.

【Example〕

FIG. 1 is a plan view of a horizontal rotation type transfer device to which the 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 are supported by a plurality of links (13).
are sequentially connected by joint pins (14) to form an endless belt-like link array, which is wound around a pair of rotors (11) and mounted. Each joint pin (14) has a link (13
) so that it can be engaged with an engaging piece (18) attached to a chain (15), which will be described later.

In addition, in the present invention, the rotor (11) is not rotationally driven, but the link row is driven, and the rotor (11) rotates the rotation shaft (12) of each rotor (11) when the link row runs. It is supported so that it can rotate freely so that it can rotate according to the rotation.

Hereinafter, for convenience of explanation, the lower side in Fig. 1 will be referred to as the "front side" and the upper side will be referred to as the "rear side", and for the same members on both the front and rear sides, (a) is attached to the front side. , those on the rear side are marked with (b).

Endless chains for driving are installed along the two link rows, front and rear. The front chain (15a) is mounted on the driving sprocket (16a) (this sprocket is not shown in Figure 1) and the driven sprocket (17a), and the rear chain (15b) is mounted on the driving sprocket (16a) (this sprocket is not shown in Figure 1). It is mounted on the side sprocket (16b) and the driven sprocket (17b) so that they can rotate in a horizontal plane.

The two chains (15a) and (15b) are constructed so that each rear row is close to or slightly overlaps the corresponding link row, and the pitch of the joint pins (14) of the link row is (The effective length of the link (13)) A plurality of pairs of engagement pieces (18) are attached at intervals corresponding to the length (effective length of the link (13)).

The pair of engagement pieces (18) are attached at intervals with an appropriate margin relative to the diameter of the joint pin (14).

Between each pair of engagement pieces (18) are joint pins (1
4) It is designed to be moved by holding it in place.

Shaft (19) of drive side sprocket (16a) (16b)
a) (19b) extends downward and fixes large bevel gears (20a) (20b), and sprockets (16a) (16b) respectively extend downward and fix large bevel gears (20a) (20b), respectively.
) (20b) to rotate integrally.

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

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 (24).

A sprocket (25) concentric with the drive shaft (22a) is fixed to the front of the differential type vehicle mounting W (24), and a chain (25) is fixed to the front surface of the differential type vehicle mounting W (24).
27) was constructed.

FIG. 3 is a cross-sectional plan view showing the differential gear device (24),
The configuration is similar to a differential gear device in a well-known automobile drive device.

The front drive shaft (22a) from the front side and the rear drive shaft (22b) from the rear side are inserted into a cylindrical hollow gear box (28) with its axis facing in the front-rear direction to form large bevel gears. (29a) and (29b) are fixed to each drive shaft (22a) and (22b) inside the gear box (28), and a pair of small bevel gears (30) and (30) are fixed to each drive shaft (22a) and (22b) inside the gear box (28). The support shafts (31) (31) supported on the cylindrical peripheral surface of the drive shafts (22a) (22b) are installed perpendicularly to the # lines of the drive shafts (22a) (22b), and the four bevel gears are meshed with each other.

As mentioned above, the sprocket (25) is fixed concentrically with the drive shaft (22a), and the chain (27) is mounted on the front surface of the gear box (28).

The operation of the link drive device of the present invention having the above configuration is as follows.

When the motor (26) is started, the gear box (28) rotates via the chain (27) and sprocket (25).
A pair of front and rear large bevel gears (29a) (29b) and a drive shaft (22a) are connected via a pair of small gears (30) (30).
(22b) and small bevel gears (21a) (21b) are rotated integrally with the gear box (28).

The rotation of the small bevel gears (21a) (22b) is transmitted to the large bevel gears (20a) (20b) which are meshed symmetrically in the front and back, and via the respective shafts (19a) (19b),
The sprockets (19a) (19b) are driven to rotate in opposite directions, and the chains (15a) (1,5b) mounted on the sprockets (19a) (19b) are
) are driven to run in opposite directions.

A large number of pairs of engagement pieces (18) attached to each chain (15a) (15b) are located in a region where the rear row side of each chain (15a) (15b) is close to or overlaps the corresponding link row, and each chain has nine links. Since the joint pins (14) of the rows are sandwiched, the front and rear link rows are connected to the chain (15a).
(15b) and are driven in mutually opposite directions, 1
It rotates around a pair of rotors (11) m).

At this time, when each equilateral triangular rotor (11) is in the state shown in the first diagram, that is, in an angular position that is front and back symmetrical with respect to the center line connecting the left and right rotation axes (12) (12), The link rows move in opposite directions at the same speed, but at other angular positions, a speed difference occurs between the front and rear link rows.

In order to adjust this speed difference and smoothly drive the front and rear link rows, a differential gearing system is used! (24) is provided.

When each rotor (11) is at the angular position shown in the first diagram and the speeds of the front and rear link rows are equal, the front and rear chains (15a) (15b) and sprocket (18a)
(18b), large bevel gear (20a) (20b) rotates at a constant speed in the opposite direction, so large bevel gear (20a) (2
The small bevel gears (21a) and (21b) that mesh with the gears 0b) may rotate at the same speed and in the same direction. Therefore, the gear box (
The large bevel gears (29a) and (29b) in 28) also rotate in the same direction at the same speed, and no relative rotation occurs between them.
A pair of small bevel gears (30) that are pivotally supported on a gear box (28)
6 If each rotor (11) rotates from the angular position shown in the first figure and the speeds of the front and rear link rows are different, the chains (15a) (15b) and sprocket (1
8a) (18b), and the small bevel gears (21a) (21b) because the rotational speeds of the large bevel gears (20a) and (20b) are different.
) and the large bevel gears (29a) (29b) are also different in rotational speed, and the large bevel gears (29a) (29b) in the gear box (28)
b) rotates relative to each other, and the pair of small bevel gears (30) rotate around the shaft (31) to absorb a speed difference of around 1.

That is, by the motor (26), the chain (27),
Differential gearing (24) via sprocket (25)
If the gear box (28) is rotated at a required constant speed, the front and rear small bevel gears (21a) (21b) will rotate into the gear box (28).
8), each rotating with a large bevel gear (20a).
(20b), shaft (19a) (19b), sprocket (
18a) (18b), the chain (15a) (1
5b), and the corresponding joint pins (14) can be held by the engaging pieces (18) attached to each chain (15a) (15b) with a required pinch to drive the link row.

During driving, the speed changes that occur in the front and rear link rows based on the angular position of each rotor (11).

Since it is absorbed by the differential gear t (24), it can be driven extremely smoothly, and compared to the conventional rotor (0
1) It is possible to reduce the burden placed on the rotor rotation shaft and the drive source in the means for rotationally driving.

In addition, in a horizontal rotation type transfer device using an equilateral triangular rotor, pulsations occur in the running of the link rows mentioned above, and
There is a problem in that the running route of the link train moves periodically.

That is, in FIG. 4, the distance from the center of the rotor (01) to the vertex of the equilateral triangle is r, and the distance to the midpoint of side R1 is r, and R = 2 r, so the running route of the link row is , the rotor (01) moves with a width of r with a period of 173 rotations.

In the device shown in the first figure, the front and rear chains (15a) (15b
) etc., it is necessary to configure the running route of the link train so that it does not move.

The means for maintaining the travel path of the link row in a fixed position was developed by the applicant of the present invention, who simultaneously filed a patent application (title of the invention: ``Devices for correcting the running position of link rows in a horizontal rotary transfer device using equilateral triangular rotors''). Therefore, I will briefly explain it here.

Each rotor (11) has a guide roller (32).
A large gear (34) is fixed to the rotating shaft (12) of the rotor (11), and is integrated with the rotor (11). Rotate. Place the large gear (34) on the moving platform (33).
A small gear (35) that meshes with is supported by a vertical shaft (36).

The fractional ratio of both gears is 3:1.

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

With this configuration, every time the rotor (11) rotates 1/3, the movable table (33) reciprocates with an amplitude r in the front-rear direction so as to offset the movement of the link row, and The route can be held constant.

Although the above has been described based on the illustrated embodiments, the present invention has the following features:
The present invention is not limited to the above-mentioned content, and various applications and modifications are possible.

For example, in the above example, the chain (15a) (15
The engaging pieces (18) to be attached to b) are attached in 1' pairs each so as to sandwich the joint pin (14).
If the device transfers the link row in only one direction, one engagement piece (18) is provided on the rear side of each joint pin (14).
) may be installed.

The output of the differential gear (24) is connected to the sprocket (18a)
The means for transmitting the signal to (18b) is not limited to the bevel gear in the illustrated embodiment, but may also be a screw gear, a crown gear, or the like.

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

〔Effect of the invention〕

(1) In a horizontal transfer device using an equilateral triangular rotor (11), the speed difference that occurs between the link rows on both sides is absorbed by the differential gear device I (24), and the link row is made to run stably and smoothly. be able to.

(2) A drive device is attached to each link row to make it run, and the rotor (11) is rotatably supported so that it follows the movement of the link row, so the rotor shaft (12)
No excessive stress is placed on the product, and there is little risk of damage.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a horizontal rotation type transfer device to which the link drive device of the present invention is applied, Fig. 2 is a perspective view showing the main parts of the drive device, and Fig. 3 is a cross-sectional plane of the differential gear device. figure. FIG. 4 is a schematic diagram of a horizontal rotary transfer device using an equilateral triangular rotor. (11) Rotor (12) Rotating shaft (13) Link (14) Joint pin (15a) (15b)
Chain (16a) (16b) (1,7a) (17b) Sprocket (18) Engagement piece (19a) (1
9b) Shaft (20a) (20b) Large bevel gear (21a)
(21b) Small bevel gear (22a) (22b) Drive shaft
(23a) (23b) Bearing (24) Differential gear device I
(25) Sprocket (26) Motor
(27) Chain (28) Gear surface (29a)
(29b) Large bevel gear (30) Small bevel gear (31)
Support shaft (01) Rotor (02) Rotating shaft (03)
Link (04) Joint (05) Pallet Figure 2 Figure 3 Figure 4

Claims (3)

[Claims] (1) Mounted rotatably around a pair of left and right vertical axes,
A pair of equilateral triangular rotors with the same dimensions are equipped with an endless link row in which links with a unit length corresponding to the side length of the rotor are sequentially connected by joint pins, and the horizontal In a link drive device of a rotary transfer device, engaging pieces are installed along a pair of link rows, respectively on a pair of sprockets, and engage with joint pins of the link row.
A pair of drive shafts arranged on a common axis so as to drive at least one of a pair of endless chains installed at a pitch that matches the link unit length and a sprocket on which the endless chains are installed, respectively, via transmission means. , a differential gear device that rotatably connects a pair of drive shafts in conjunction with each other at a constant speed and a different speed, 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 triangular rotor. (2) One end of the joint pin protrudes from the surface of the link row,
The horizontal rotation type transfer using an equilateral triangular rotor according to claim (1), wherein the engagement piece attached to the endless chain contacts and presses the protrusion of the joint pin to drive the link row. Device link drive. (3) Two or more sets of engagement pieces corresponding to each joint pin are installed at a pitch that matches the link unit length, and the joint pin is sandwiched between each set of engagement pieces. A link drive device for a horizontal rotation type transfer device using the equilateral triangular rotor according to claim (2).