JPH069018A - Horizontal rotation type transfer device - Google Patents

Abstract

PURPOSE:To decrease an installation area of a device and prevent mutual collision of pallets at a semicircular part of a guide rail. CONSTITUTION:Since centers of a pair of sprockets 2, 3 equipped with an endless chain 4 for transferring a pallet 7 are displaced inward in the longitudinal direction with respect to centers of semicular parts of a guide rail 1, the pallet 7 passing the semicircular part makes a long detour outward in the longitudinal direction by a displacement quantity (d) with respect to a center of each of sprockets 2, 3 so as to form a clearance S to an adjacent pallet 7 and smooth transfer can be thereby achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device for transferring an article to be stored to a required position in a warehouse or the like, and particularly,
The present invention relates to a horizontal rotary transfer device in which a plurality of pallets for placing articles are moved along a guide rail laid in an endless loop.

[0002]

2. Description of the Related Art FIG. 2 is a plan view showing an example of the basic structure of a conventional horizontal rotary transfer device.

The guide rail (101) is formed in an oval shape by connecting the semicircular portions at the left and right ends with a pair of front and rear straight portions, and is installed horizontally.

Inside the guide rail (101), a pair of sprockets (102) and (103) are rotatably supported around the respective semicircular portions so as to be rotatable about a vertical direction, and the endless chain (104). Is installed.

One sprocket (102) has a pulley (105)
Coaxially as a unit, and the pulley (105) and motor (10
The belt is mounted on the pulley of 6) and the sprocket (102) is rotated by driving the motor (106), and the endless chain (104) is rotated around the two sprocket (102) (103). It is designed to rotate.

A plurality of (8 in the illustrated example) pallets (10
7) is installed so as to be movable along the guide rail (101). Each pallet (107) is provided with a pair of wheels (108) rolling along the guide rail (101) and one wheel (109) rolling along an auxiliary guide rail (not shown), Support the pallet (107) horizontally.

Each pallet (107) has a link (110).
Through the endless chain (104). Link (11
0) is formed in an L-shape bent substantially at a right angle, both ends thereof are connected to the endless chain (104), and the bent apex portion is fixed to the pallet (107).

The engaging portion between the link (110) and the pallet (107) can be moved to some extent in the width direction orthogonal to the transfer direction of the pallet (107). This is the link (110) between the straight part and the semi-circular part of the guide rail (101).
In order to correct the movement of the relative position between the pallet (107) and the pallet (107), for example, a long hole in the width direction is provided in the pallet (107) and a pin erected at the apex of the link (110) is loosely fitted. And so on.

[0009]

In the above-mentioned device,
When transferring the pallet (107) along the guide rail (101), if the distance between the two rows of pallets along the straight part of the guide rail (101) and the interval between adjacent pallets are small, a semicircular portion There is a disadvantage that the pallet collides with an adjacent pallet when passing through the.

That is, as shown in FIG. 2, when the distance between the pallet rows (A ₀ ) and the distance between adjacent pallets (B ₀ ) are small, the pallet passes through the semicircular portion as shown by the chain double-dashed line. The inner corner (C) of the pallet (107a) to be
It will collide with the edge of 07b) and hinder the transportation.

In order to eliminate this inconvenience, it is natural that the distance between the pallet rows, the distance between the adjacent pallets, or both of them may be appropriately increased. However, there is a problem that the occupied area increases.

FIG. 3 is a plan view showing an example in which the distance between the pallet rows is larger than that in FIG. 2 (A ₁ ). The guide rail (101 ') is the same as that in FIG. Chiang (1
The diameter of the pair of sprockets (102 ') (103') is large in order to displace the 04 ') outward in accordance with the displacement of the pallet row.

In this case, as shown by the chain double-dashed line, a space (S ₁ ) can be provided between the pallet passing through the semicircular portion of the guide rail (101 ') and the adjacent pallet. Since the pallet (107) located at is displaced more outward than in the case of FIG. 2, the depth dimension (W ₁ ) of the device is (A ₁ −A ₀ ) greater than the depth dimension (W ₀ ) of FIG. Only grows.

The longitudinal dimension (L ₁ ) of the device is likewise (A ₁ -A ₀ ) larger than the dimension (L ₀ ) of that of FIG.

FIG. 4 shows the spacing between adjacent pallets.
FIG. 2 is a plan view showing a case where (B ₂ ) is made larger than (B ₀ ) in FIG. 2, and in this case also, as shown by a chain double-dashed line, there is a space between the pallet passing through the semicircle and the adjacent pallet. (S ₂ ) can be provided, but the longitudinal dimension (L ₂ ) of the device is
It becomes larger than (L ₀ ) in FIG. 2 by (B ₂ −B ₀ ) × n / 2 (n: the number of pallets).

As described above, when the occupying area of the device is increased, the area of a warehouse or the like in which the device is installed becomes large, or when the device is installed in an existing building, the number of pallets is limited, resulting in poor economic efficiency. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a horizontal rotary transfer device which has improved this problem, has a small occupied area, and prevents collision when a pallet passes through a semicircular portion.

[0018]

In order to achieve the above-mentioned object, the present invention provides a guide rail which is formed in an oval shape by connecting semicircular portions at both ends with a pair of straight portions and which is installed horizontally. On one side, the endless chain mounted on a pair of sprockets is installed in parallel to the straight part of the guide rail, and mounted on the endless chain at a constant pitch on multiple pallets movably along the guide rail. In a horizontal rotary transfer device, in which each pallet is transferred along a guide rail by rotating the endless chain via a sprocket by attaching a plurality of links to each other, the endless chain is mounted. The center position of the pair of sprockets is deviated inward in the longitudinal direction with respect to the center of the semicircular portion of the guide rail.

[0019]

Operation: By shifting the center position of the sprocket that drives the endless chain inward in the longitudinal direction from the center of the semicircular portion of the guide rail, the pallet passing through the semicircular portion of the guide rail is Compared with the case where the centers of the circles coincide, a large turn is made outward in the longitudinal direction of the device relative to the center of the sprocket, leaving a space between adjacent pallets. S) is formed and the pallets can be transferred without collision.

[0020]

1 is a plan view showing the schematic construction of an embodiment of a horizontal rotary transfer apparatus of the present invention, which is constructed in substantially the same manner as the conventional apparatus shown in FIG.

The guide rail (1) has a radius (r) at both left and right ends.
The semicircular parts of are connected by a pair of front and rear straight parts to form an oval shape, which is installed horizontally.

Inside the guide rail (1), a pair of left and right sprockets (2) and (3) are installed rotatably around a vertical axis,
The endless chain (4) is installed. Each sprocket (2)
The center (O ') of (3) is installed at a position displaced inward in the longitudinal direction of the device by a distance (d) with respect to the center (O) of each semicircular portion.

Pulley attached to one sprocket (2)
(5), motor (6) and belt, multiple pallets (7),
The wheels (8), (9), the link (10), etc. are the same as those in the apparatus of FIG.

The range in which the apex of the link (10) can move in the width direction with respect to the pallet (7) is at least the center (O ') of the sprockets (2) and (3) as compared with the case of FIG. And a length corresponding to the amount of deviation (d) between the center (O) of the semicircular portion of the guide rail (1) and extending in the direction of the wheel (9).

Similar to the device of FIG. 2, the device of FIG. 1 drives the endless chain (4) through the pulley (5) by the motor (6) and each pallet (7) through the link (10). ) Is transferred along the guide rail (1).

During this transfer, when the pallet (7) passes through the semicircular portions at both ends of the guide rail (1), the center (O ') of the sprockets (2) and (3) is changed to the center (O') of the semicircular portion. ), The sprocket is
(2) The range in which the link (10) connected to the endless chain (4) around (3) moves with respect to the pallet (7) is more inward in the longitudinal direction than in the case of FIG. It is large corresponding to the deviation amount (d).

On the contrary, the sprocket (2) (3) and the link (1
Observing with reference to 0), the pallet (7) passing through the semi-circular part of the guide rail (1) makes a larger roundabout than the case of FIG. Will be done.

As the pallet (7) makes a large turn in this manner, the pallet (7) can be transferred while maintaining a space between the adjacent pallets. That is, the two pallets (7a) (7b) indicated by the two-dot chain line in FIG. 1 indicate the positions where the adjacent pallets are closest to each other, and in this case as well, between the pallets (7a) (7b). A gap (S) is formed, and they are transferred without collision.

The apparatus shown in FIG. 1 is 2 times larger than the conventional example shown in FIG.
Other than the fact that the center position of each sprocket (2) (3) is deviated inward in the longitudinal direction, the other shape dimensions of the guide rail (1), the distance between two pallet rows
(A), the interval (B) between adjacent pallets in the straight line portion is the same as in the case of FIG.
(L) and width (W) are equivalent to those of the device of FIG.

That is, according to the present invention, it is possible to realize a horizontal rotary transfer device which can prevent the adjacent pallets from colliding with each other and smoothly transfer the pallets even though the occupied installation area is small. .

Needless to say, the present invention can be applied to a multi-stage type transfer device in which a plurality of sets of horizontal rotary transfer devices are vertically stacked.

[0032]

【The invention's effect】

(a) Even if the distance (A) between the pallet trains in the straight part of the guide rail (1) and the space (B) between the adjacent pallets (7) are set small, the pallets do not collide with each other and smoothly. Can be transferred.

(B) When installed in a building such as a warehouse, since the distance (A) and the interval (B) are small, the installation area occupied by the entire apparatus can be reduced and the efficiency of use of the building can be improved. .

(C) Since the center position of the pair of sprockets (2) and (3) in the conventional device is only displaced inward in the longitudinal direction, there is no need to modify the basic structure. It can be easily implemented.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of an embodiment of the present invention.

FIG. 2 is a plan view showing a basic configuration of a conventional horizontal rotary transfer device.

FIG. 3 is a plan view showing a conventional example in which a distance between pallet rows is increased.

FIG. 4 is a plan view showing a conventional example in which an interval between adjacent pallets is increased.

[Explanation of symbols]

(1) Guide rail (2) (3) Sprocket (4) Endless chain (5) Pulley (6) Motor (7) Pallet (8) (9) Wheel (10) Link (A) Distance between pallet rows (B ) Distance between adjacent pallets (O) Center of guide rail semi-circle (O ') Center of sprocket (d) Deflection amount of sprocket center (S) Clearance
(Space) (L) Total length of device (W) Total width of device

Claims (1)

[Claims] 1. A guide rail in which an endless chain mounted on a pair of sprockets is formed inside a horizontally extending guide rail, which is formed by connecting a pair of straight portions at both ends of a semicircular portion. Installed in parallel to the straight part of the, and attached to a plurality of pallets movably along the guide rails, a plurality of links attached to the endless chain at a fixed pitch, respectively, and through a sprocket. In a horizontal rotary transfer device in which each pallet is transferred along a guide rail by rotationally driving the endless chain, the center position of a pair of sprockets on which the endless chain is mounted is set to a semicircle of the guide rail. A horizontal rotary transfer device characterized in that it is displaced inward in the longitudinal direction with respect to the center of the part.