JPH06305528A - Carrier device - Google Patents

Abstract

PURPOSE:To carry a pallet or a work in a circular arc by interposing an oil bearing bush between an axis of rotation and a cylindrical roller, causing a slide between the cylindrical roller and the oil bearing bush when a load of more than a specified value works on the cylindrical roller and rotating the cylindrical roller freely. CONSTITUTION:To move a pallet A in a circular arc, it is required to change the numbers of rotation of a cylindrical roller 35 positioned outward of an axis of rotation 33 and a cylindrical roller 35 positioned inward. At this time, an oil bearing bush 36 is interposed between the axis of rotation 33 and each of the cylindrical rollers 35, and when a load of more than a specified value works on the cylindrical roller 35, a slide is generated between the cylindrical roller 35 and the oil bearing bush 36, and the cylindrical roller 35 is rotated freely. Consequently, the numbers of rotation of the cylindrical roller 35 positioned outward of the axis of rotation 33 and the cylindrical roller 35 positioned inward automatically differ, and as the pallet A moves along a guide rail, it is possible to move the pallet A with a work on it while changing its direction.

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 a work with a rotating roller.

[0002]

2. Description of the Related Art Although there are various types of transfer devices for transferring a work, a roller conveyor for transferring the work by utilizing the rotation of rollers is widely used.

By the way, the above-mentioned conveying device is not always constructed in a straight line, and is often changed in direction due to a problem of installation space and the like, and the direction changing portion is formed in a curved form.

In the curved part of the transfer device using a roller conveyor, in order to transfer the work while keeping the posture of the work constant, it is necessary to change the rotation speed inside and outside the roller, and usually a conical roller is used. There is. For example, as shown in FIGS. 4 and 5, a pair of frames (1) (2) curved into a predetermined curve.
The rotating shafts (3) (3) are radially arranged on the upper side, and are rotatably supported via bearing units (4) (5) having a centering property such as pillow balls, and the rotating shafts (3) ( 3) ... to conical roller (6)
(6) ... is attached.

These conical rollers (6) (6) ... are frame (1) (2)
The taper is used so that a predetermined speed difference can be obtained between the inside and the outside depending on the curvature of the. Also conical roller (6) (6)
The rotating shafts (3) (3) ... are inclined so that the upper surface of the ... becomes horizontal.

The above rotary shafts (3) (3) are driven by the respective rotary shafts.
(3) (3)… The driven gear (7) (8) with two sets of sprocket wheels is attached to the end, and the chain (10) (11)… is attached to this driven gear (7) (8). Are alternately mounted in a staggered manner, one of which is connected to the drive gear (13) of the drive shaft (12) mounted on the lower part of the frame (1) (2), and the drive shaft (12) is driven appropriately. It is adapted to be rotated by a mechanism (not shown).

[0007]

In the above conveying device, the taper of the conical roller (6) must be set according to the curvature of the frames (1) and (2), and the rotation with the conical roller (6) attached. Axis (1
Since the mounting angle of 2) had to be adjusted, the assembly was extremely troublesome and required a lot of labor and time for the assembly.

Further, in order to deal with various curvatures, it is necessary to manufacture and prepare conical rollers with various taper in advance, which is very wasteful.

Further, it is difficult to control the taper of the conical roller (6), the manufacturing thereof is troublesome, and the cost is high.

Further, in the case where the work is carried by the carrying device using the conical roller (6), in order to perform the accumulation rate for temporarily retaining the work on the carrying device,

There is also a problem that the drive portion needs to be separated from the conical roller (6) to temporarily stop the rotation of the conical roller (6), which further complicates the structure of the entire apparatus.

[0012]

A conveying device is provided with a support plate curved at a predetermined curvature, and a predetermined number of radial arrangements about the center of curvature of the support plate are radially arranged on an upper surface of the support plate and are rotatable. The supported rotating shafts, the cylindrical rollers attached to the inside and the outside of each rotating shaft one by one, the drive mechanism for rotationally driving each rotating shaft, and arranged on the support plate,
An arc shape centered on the center of curvature of the support plate, and a guide rail for moving the pallet or work placed on the cylindrical roller in an arc shape,

When an oil-impregnated bush is interposed between the rotary shaft and the cylindrical roller and a certain load is applied to the cylindrical roller, slip occurs between the cylindrical roller and the oil-impregnated bush so that the cylindrical roller can rotate freely. It is the one.

[0014]

As described above, the oil-impregnated bush is interposed between the rotary shaft and the cylindrical roller, and when a load of a certain amount or more acts on the cylindrical roller, the cylindrical roller and the oil-impregnated bush are caused to slide and the cylindrical roller is moved. By freely rotating, a pallet or a work is conveyed in an arc shape.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 to FIG.
Is shown.

In the figure, (31) is a flat support plate which is curved with a predetermined curvature and has a substantially fan-shaped planar shape, and (32) is
A support frame for supporting the support plate (31).

(33) is a support plate (31) on the upper surface of the support plate (31).
A predetermined number of rotating shafts are arranged radially around the center of curvature of each of the rotating shafts (33) .By supporting the vicinity of both ends by bearing units (34) and (34), the rotating shafts (33) can be rotated. I am doing it.

Reference numeral (35) is a cylindrical roller attached to each of the rotating shafts (33).

As shown in FIG. 3, the cylindrical roller (35) is attached to the rotary shaft (33) by attaching an oil impregnated bush (36) to the rotary shaft (33) and forming it on the outer circumference of the rotary shaft (33). Between the ball groove (37) and the key groove (38) formed in the oil-impregnated bush (36), the power transmission ball (39) is interposed, and the cylindrical roller (35) is provided around the oil-impregnated bush (36). ) Is attached.

Therefore, usually the rotary shaft (33) and the cylindrical roller (35)
When the cylindrical roller (35) is subjected to a certain load or more, a slip occurs between the cylindrical roller (35) and the oil impregnated bush (36), and the cylindrical roller (35) rotates freely, It is designed to prevent equipment damage.

(40) is fixed to the outer peripheral end of the rotary shaft (33),
A driven gear having a double row sprocket wheel (40a) (40b), (41) is an intermediate gear having a double row sprocket wheel (41a) (41b) interposed between each driven gear (40),
Between the driven gear (40) and the intermediate gear (41) that are adjacent to each other, the power transmission chain is alternately distributed to the inner side and the outer side in a zigzag manner.
(42) and (43) are attached, and each rotary shaft (33) is driven gear (4
0), the intermediate gear (41) and the power transmission chains (42) and (43).

Further, in each of the rotating shafts (33), one of the two rotating shafts (33) (33) located at the outer end of the support plate (31) is attached to the rotating shaft (33). The fixed driven gear (40) is connected to a drive mechanism (not shown).

Then, the rotary shaft (3
By rotating 3) by the drive mechanism, the rotating shafts (33), the driven gears (40), the intermediate gears (41), and the rotating shafts (42) and (43) connected to each other are connected. All 33) are designed to rotate.

Reference numeral (44) denotes a guide rail arranged so as to be located above the center of the support plate (31) and above the rotary shaft (33), and (45) supports the guide rail (44). Therefore, the support rails (31) are erected at a predetermined interval on the support plate (31), and the guide rail (44) has an arc shape centered on the center of curvature of the support plate (31).

In the above structure, the transfer device according to the present invention
In order to carry the work by changing the carrying direction by the (30), first, the pallet is placed on the carrying device (30).
Place (A).

The lower surface of this pallet (A) is a transport device.
It comes in contact with the cylindrical roller (35) arranged in (30), and on the lower surface
A protrusion (B) slidably fitted to a guide rail (44) provided on the transfer device (30) is provided so as to project.

Next, a work is placed on the pallet (A) and each rotary shaft (33) is rotated by the drive mechanism.

Then, a cylindrical roller attached to each rotating shaft (33)
Since (35) rotates with the rotation axis (33), this cylindrical roller (3
The pallet (A) that is in contact with 5) moves as the cylindrical roller (35) rotates.

At this time, the projection (B) protruding downward from the lower surface of the pallet (A) is fitted with the guide rail (44) provided on the transfer device (30), and the guide rail (44 ) Has an arc shape centered on the center of curvature of the support plate (31) as described above, the pallet (A) advances while changing its direction along the guide rail (44).

In order to move the pallet (A) in an arc shape, a cylindrical roller (35) located outside the rotary shaft (33) is used.
It is necessary to change the number of rotations of the inner and cylindrical rollers (35) located inside, but at this time, the oil impregnated bush (36) is interposed between the rotating shaft (33) and each cylindrical roller (35). It is, cylindrical roller (35)
When a certain amount of load is applied to the roller, slippage occurs between the cylindrical roller (35) and the oil impregnated bush (36), and the cylindrical roller (35) rotates freely, so it is located outside the rotating shaft (33). Cylindrical roller (3
5) and the cylindrical roller (35) located inside, the number of revolutions changes automatically, the pallet (A) moves along the guide rail (44), and the pallet on which the work is placed. (A)
It can be moved while changing its direction.

Further, since the work is temporarily retained on the transfer device (30), the movement of the pallet (A) on the transfer device (30) is prevented without stopping the rotation of the rotating shaft (33). In this case, unnecessary force acts on the pallet (A) and the cylindrical roller (35) because slippage occurs between the cylindrical roller (35) and the oil impregnated bush (36), causing the rotating shaft (33) to idle. There is no damage to both.

[0032]

As described above, according to the present invention, the conveying device is provided with a support plate curved at a predetermined curvature, and a predetermined number of the transfer devices are radially arranged around the center of curvature of the support plate. And rotatably supported rotating shafts, cylindrical rollers attached to the inside and outside of each rotating shaft, a drive mechanism for rotating each rotating shaft, and a support plate. Formed into a circular arc centered on the center of curvature of the support plate, and configured with a guide rail for moving the pallet or the work placed on the cylindrical roller in a circular arc,

An oil-impregnated bush is interposed between the rotary shaft and the cylindrical roller, and when a load of a certain amount or more acts on the cylindrical roller, a slip is caused between the cylindrical roller and the oil-impregnated bush.
By freely rotating a cylindrical roller, a pallet or a work is conveyed in an arc shape.

That is, according to the present invention, the work can be conveyed by changing the conveying direction by using the cylindrical roller. Since the cylindrical roller can be used in this way, the work can be easily attached to the rotating shaft, Easy to assemble and very easy to manufacture.

Further, it is not necessary to stock special parts dedicated to the curvature in the carrying direction, and it is possible to easily cope with bending of various curvatures.

Furthermore, since it is not necessary to stop the rotation of the rotary shaft when the work is retained on the transfer device, the accumulation rate can be very easily achieved.

[Brief description of drawings]

FIG. 1 is a plan view of a transfer device according to the present invention.

FIG. 2 is a side view of the transfer device according to the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part of a transfer device according to the present invention.

FIG. 4 is a partial cross-sectional side view showing a conventional example of a transfer device.

FIG. 5 is a plan view showing a conventional example of a transfer device.

[Explanation of symbols]

 30 Transport Device 31 Support Plate 33 Rotating Shaft 34 Bearing Unit 35 Cylindrical Roller 36 Oil Bushing 40 Driven Gear 42 Power Transmission Chain 43 Power Transmission Chain 44 Guide Rail A Pallet

Claims (1)

[Claims] 1. A support plate curved with a predetermined curvature, a rotation shaft rotatably supported on a top surface of the support plate in a predetermined number radially around the center of curvature of the support plate, and each rotation. A cylindrical roller attached to each of the inner side and the outer side of the shaft, a drive mechanism for rotationally driving each rotation shaft, and a circle centered on the center of curvature of the support plate arranged on the support plate. It has an arc shape and consists of a pallet placed on a cylindrical roller or a guide rail for moving a workpiece in an arc shape. An oil-impregnated bush is interposed between the rotary shaft and the cylindrical roller, and the cylindrical roller has a certain amount or more. When the load of 1 is applied, the cylindrical roller and the oil-impregnated bush cause a slip, and the cylindrical roller is allowed to rotate freely.