JP3098609B2 - Differential carrier rotating device in chain conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain conveyor having a truck driven and driven by a power chain, for example, a trolley conveyor, and more particularly, to a carrier which is connected to a continuously traveling truck and moves. The present invention relates to a carrier rotating device that rotates a predetermined angle in a state.

[0002]

2. Description of the Related Art Generally, a trolley conveyor used for a heat treatment line, a processing line, a painting line, a drying line or the like in a factory has a carriage driven by a power chain, and the carriage is provided with a carrier (hereinafter referred to as a hanger). ) Is suspended and placed on the hanger to convey articles. Further, the hanger is rotatably connected to the bogie, is positioned at, for example, every 90 degrees by an indexer, and has a predetermined number of projecting portions projecting outward in the indexer portion.

[0003] A rotation fixing pin is fixed to a fixing member facing the conveying path of the hanger. When the hanger travels or moves, the protrusion comes into contact with the fixing pin. , The hanger is rotated at a peripheral speed equal to its running speed.

[0004]

According to the above-described hanger rotating device, when the traveling speed of the bogie is high, the impact of the hanger abutting on the fixing pin is large, and the angular speed of rotating the hanger is also high. The overrun tends to occur due to the inertial force, making it difficult to reliably rotate the hanger at a predetermined angle, for example, every 90 degrees.

Accordingly, the present invention provides a carrier (a pin) which moves a rotating member (pin) so that the relative speed with respect to the carrier (hanger) can be reduced, and the indexing rotation can be reliably performed at a predetermined angle. Hanger) It is an object to provide a rotating device.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has trucks (7) and (9) driven and driven by a power chain (3). In a chain conveyor (1), a carrier (29) is rotatably connected to an indexer (22) via an indexer (22).
Projecting portions (23a) and (23b) provided integrally with the carrier (29) in the rotating direction and projecting in the radial direction, and are disposed along the transport path of the chain conveyor (1),
A first moving member (37) that moves in conjunction with the carrier (29), and is movably supported along the transport path of the chain conveyor (1);
A second moving member (52) having a rotating member (25) for rotating the carrier (26) in contact with the (23b);
And an interlocking member (4) that interlocks the second moving member (52) with the first moving member (37) at a predetermined speed ratio.
5, 47, 49, 50, 53), and the rotation member (2) with respect to the protrusions (23a), (23b).
5) The carrier (29) is rotated by the relative movement based on the predetermined gear ratio.

[0007]

According to the above construction, when the first moving member (37) moves in conjunction with the carrier (29) running and driven by the chain conveyor (1), the interlocking members (45, 4) move.
7, 49, 50, 53), and the second moving member (52) is moved with a predetermined gear ratio. Then, the rotating member (25) provided on the second moving member (52)
The rotation member (25) moves at a predetermined speed ratio with respect to the carrier (29), and the protrusions (23a),
(23b) abuts with the carrier (29) at a relative speed based on the predetermined gear ratio. The carrier (29) rotates and is positioned by the indexer (22) by the relative movement of the projections (23a) and (23b) with respect to the rotation member (25) based on the relative speed.

[0008]

As described above, according to the present invention,
The rotation member (2) for the protrusions (23a) and (23b)
The carrier (2) is moved by the relative movement based on the predetermined gear ratio of (5).
9), the rotating member (25) and the protruding portions (23a), even when the chain conveyor (1) runs at high speed.
The relative speed of (23b) is small, and the carrier (29) can be smoothly and reliably indexed and rotated at a predetermined angle without generating a large impact.

Note that the reference numerals in parentheses are for comparison with the drawings, but do not limit the configuration of the present invention.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a trolley conveyor will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the trolley conveyor 1 includes a power chain 3 guided on a rail 2.
And a trolley rail 5 arranged substantially parallel below the chain 3. A front bogie 7 and a rear bogie 9 are supported on the trolley rail 5 by rollers 6 and 6 so as to be able to run freely. The front bogie 7 supports an engaging member 10 protruding upward, and also supports a corner member 11 protruding forward and swingably.
And the locking tool 10 is linked so that the locking tool 10 may be immersed by the upward swing of the corner member 11. An auxiliary locking member 12 is supported on the front bogie 7 so as to be rotatable clockwise, and a push piece 3a protruding downward and fixed to the power chain 3 pushes the locking member 10 to move the bogie. When traveling, the auxiliary locking member 12 sandwiches the push piece 3a from behind to ensure the traveling of the carriage by the chain 3. Also,
A tail member 13 is fixed to the rear bogie 9 so as to project rearward from the rear bogie 9. The corner member 11 of the front bogie 7 that follows the rear bogie 9 abuts on the tail member 13, thereby swinging upward, and a locking member 12.
To disengage from the power chain 3.

The front bogie 7 and the rear bogie 9 are respectively connected with suspending pins 15, 15, and a load bar 16 is rotatably connected and supported over both suspending pins. A pin 1 is located at the center of the load bar 16.
7, a bracket 19 is connected so as to be rotatable in the front-rear direction and held at a predetermined position by a stopper pin 18, and the bracket 19
Has been fixed. As shown in detail in FIG. 4, a disc 20a is integrally provided at the lower end of the rod 20, and the upper surface of the disc 20 has wavy irregularities 20b, 2 at every 90 degrees.
0c is formed. Then, on the disk 20a,
An index plate 21 having a hole 21a and an edge 21b in the center is placed, and the wavy uneven portion and the circular uneven portion are formed at the lower end of the edge 21b. Then, the concave and convex portions abut on the concave and convex portions 20b and 20c of the disk 20a.
An indexer 2 which is mounted and positions and holds the indexing plate 21 every 90 degrees by engagement of the two concave and convex portions every 90 degrees.
2.

1 and 3 on the indexing plate 21.
As shown in detail in FIG. 1, an indexing drive plate 23 is integrally fixed, and the drive plate 23 is formed with two projecting portions 23a and 23b extending in a radial direction. The protrusion 23
The indexing drive plate 23 is alternately rotated every 90 degrees by contacting a rotation pin 25 described later. A bracket 26 is fixed below the index plate 21 via bolts.
Further, a hanger (carrier) 29 is suspended from the bracket 26 by a pin 27. A material such as a heat-treated component is placed on the hanger 29, and various processes such as an air cooling process are performed.

As shown in FIG. 5 and FIG. 6, a differential hanger (carrier) rotating device 30 is provided along a part of the transport section of the trolley conveyor 1. The differential hanger rotation device 30 has a fixed frame 31 disposed at a straight portion of the trolley conveyor 1, and an upper fixed rail 33 is provided on an upper portion of the fixed frame 31 via an arm member 32. The fixed frame 31 is fixed along a predetermined length, and a lower fixed rail 35 is disposed below the fixed frame 31 in parallel with the upper fixed rail. Further, the upper fixed rail 33 has a linear guide device 3.
The upper moving base 37 is guided via the base 6 so as to be able to reciprocate freely. The upper moving base 37 is separated from the upper moving base 37 by a predetermined distance.
The air cylinders 39, 40 are arranged facing each other, and the piston rods 39a,
The tip of 40a is connected to one end of the holding arms 41, 42, respectively. These holding arms 41, 42 are pivotally supported by pins 41a, 42a implanted on the upper base 37, respectively, and hold the load bar 16 of the trolley conveyor 1 at both ends 41b, 42b to move upward. The base 37 can be moved integrally with the traveling of the conveyor 1. In addition, a return air cylinder 43 is provided between one end of the upper moving base 37 and the fixed frame 31, and can return the upper moving base 37 moved by the conveyor to a predetermined position.

On the other hand, a rack 45 is fixed to the side surface of the upper moving base 37 over substantially the entire length thereof. A vertical axis 47 is rotatably supported on the arm member 32 fixed to the fixed frame 31 via upper and lower bearing devices 46,46. A spur gear 49 having a predetermined number of teeth is fixed above the vertical axis 47, and a spur gear 50 having, for example, half the number of teeth of the gear 49 is fixed below the shaft 47. . In addition, the lower fixed rail 35
The lower moving base 52 is guided in a reciprocating manner via a linear guide device 51, and on the lower moving base 52, as described above, the projecting portion 23 of the index driving plate 23 is provided.
A rotation pin 25 for rotating the indexing plate 21 in contact with a or 23b is fixed. A roller 25a is rotatably fitted to the rotation pin 25. Further, a rack 53 is fixed to the side surface of the lower moving base 52 over substantially the entire length thereof. The spur gear 49 fixed to the longitudinal axis 47 meshes with the upper rack 45, and the spur gear 50 meshes with the lower rack 53.

Next, the operation of the above-described embodiment will be described.

The trolley conveyor 1 includes a power chain 3
Is suspended on the power rail 2 and travels in the direction of the arrow, and the front bogie 7 travels integrally by being pulled by the push piece 3a of the chain 3. The front bogie 7 and the rear bogie 9 are suspended by the trolley rail 5 and run integrally, and the load bar 1
The hanger 29 travels through 6 and the like, and is placed on the hanger to transport the processing material and the like.

When the hanger 29 reaches the differential hanger rotating device 30, both air cylinders 39 and 40 of the upper moving base 37 at the predetermined return position are contracted, and the holding arms 41 and 42 are respectively moved to the solid line position. To sandwich the load bar 16 from the front and rear. At this time, the upstream air cylinder 40 is contracted in advance, and at the same time when the load bar 16 comes into contact with the upstream holding arm 42, the downstream air cylinder 39 is contracted, and the load bar 16 is May be held down. At this time, the return air cylinder 43 is in a free state, and does not hinder the movement of the upper moving base 37. Accordingly, in this state, the upper moving base 37 moves in the direction of the arrow as the trolley conveyor 1 travels.

The movement of the upper moving base 37 rotates the upper spur gear 49 meshing with the rack 45 fixed to the base 37, and the rotation is transmitted to the lower spur gear 50 via the longitudinal axis 47. Further, the rack 53 meshing with the gear 50 causes the lower moving base 52 integral therewith to move linearly. At this time, the moving speed of the lower moving base 52 with respect to the upper moving base 37 can be appropriately changed depending on the gear ratio between the upper spur gear 49 and the lower spur gear 50. For example, when the ratio of the number of teeth between the upper spur gear 49 and the lower spur gear 50 is 2: 1, the lower moving base 52 moves at a half speed with respect to the upper moving base 37.

Then, the rotating pin 25 fixed to the lower moving base 52 moves at a speed appropriately reduced with respect to the trolley conveyor 1 that moves the upper moving base 37 integrally. Indexing drive plate 2 on pin 25
The indexing drive plate 23 is rotated by the relative movement of the protrusions 23a (or 23b) of the third abutment 23, and the indexing plate 21 integrated therewith is positioned with respect to the disk 20a every 90 degrees. For example, as shown in FIG. 7, when the trolley conveyor is running at 18 [m / min],
Moves at a speed of 9 [m / min], which is half of that speed. Then
The protruding portion 23a of the index driving plate 23 catches up with and contacts the rotation pin 25 (see (a)), and based on the speed difference (9 m / min) between the hanger 29 and the rotation pin 25, the index driving plate 23 is moved. It rotates 30 degrees (see (b)) and further rotates 60 degrees (see (c)) with the movement of the hanger 29 and the pin 25, and as shown in (d), the index drive plate 23 rotates 90 degrees. In this state, the protruding portion 23a separates from the rotation pin 25.
At this time, the trolley conveyor 1, that is, 600 of the hanger 29
For a stroke of [mm], the rotation drive pin 25 moves by half [300] of the stroke.

When the rotation of one hanger 29 by 90 degrees is completed, both air cylinders 39 and 40 on the upper moving base 37 are extended, and the holding arms 41 and 42 are rotated to hold the load bar 16. Then, the moving base 37 and the trolley conveyor 1 are disconnected from each other. At this time, only the air cylinder 40 on the traveling upstream side is first extended to rotate the upstream holding arm 42, and after the continuous traction with the load bar 16 is released,
The upstream side air cylinder 40 is expanded and contracted so that the upstream side holding arm 4
2 may be rotated to the rising position, and the downstream air cylinder 39 may be extended to rotate the downstream holding arm 41 to the retracted position to prepare for the next hanger interlock. By retracting the return air cylinder 43 which has been extended in the free state, the upper moving base 37 is returned to a predetermined home position, and the rack 45, the upper spur gear 49, the vertical The lower moving base 52 is returned to the predetermined home position via the shaft 47, the lower spur gear 50 and the rack 53. In this state, the apparatus waits until the next hanger 29 is moved to the predetermined home position, and performs the same 90-degree indexing rotation on the next hanger.

Also, the hanger 2 rotated by 90 degrees is rotated.
In the next step 9, the other protruding portion 23b comes into contact with the rotation pin in the next stroke, and is rotated by 90 degrees in the opposite direction.

In the above-described embodiment, the description has been given of the case where the hanger is differentially rotated by applying to the trolley conveyor. However, the present invention is not limited to this, and the same applies to the carrier of a push chain conveyor having a power chain arranged under the floor. Of course, it can be applied to

The interlocking mechanism for transmitting the linear movement from the upper moving base 37 to the lower moving base 52 is provided with an unequal speed motion mechanism such as a crank piston mechanism to impart unequal speed motion to the lower moving base 52. At the position where the rotation pin 25 starts to contact the protruding portion 23a, the pin 25 is moved quickly to reduce the relative speed with respect to the protruding portion, and at the intermediate portion, the pin 25 is gradually lowered. It may be configured to move so as to increase the relative speed with respect to the protrusion, and gradually increase the moving speed of the pin 25 so that the pin and the protrusion separate at a lower relative speed.

[Brief description of the drawings]

FIG. 1 is a side view showing a trolley conveyor to which the present invention can be applied.

FIG. 2 is a front view thereof.

FIG. 3 is a view showing an indexer, and is a view taken along the line AA in FIG. 1;

4A is a side sectional view showing an indexer, and FIG. 4B is a plan view of the disk.

FIG. 5 is a plan view showing a differential carrier (hanger) rotating device according to the present invention.

FIG. 6 is a front sectional view thereof.

FIG. 7 is a plan view showing the rotation state of the differential carrier (hanger) as the conveyor advances, and (a), (b), (c), and (d) show different states.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 chain conveyor (trolley conveyor) 3 power chain 7,9 trolley (front trolley, rear trolley) 21 indexing plate 22 indexer 23 indexing drive plate 23a, 23b protrusion 29 carrier (hanger) 37 First (upper) movement Member (base) 45, 47, 49, 50, 53 Interlocking member (rack,
Vertical axis, upper spur gear, lower spur gear, rack) 52 Second (lower) moving member (base)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 54-133589 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 17/20

Claims (1)

(57) [Claims] 1. A chain conveyor having a truck driven and driven by a power chain and rotatably connecting a carrier to the truck via an indexer, wherein the chain conveyor is provided integrally with the carrier in a rotational direction. A projecting portion projecting in the radial direction, a first moving member disposed along the transport path of the chain conveyor and moving in conjunction with the carrier, and movably along the transport path of the chain conveyor. A second moving member that is supported and has a rotating member that rotates the carrier by contacting the protruding portion; and interlocks the second moving member with the first moving member at a predetermined speed ratio. An interlocking member that rotates the carrier by relative movement of the rotating member with respect to the protruding portion based on the predetermined gear ratio. Differential carrier rotating device.