JP3021440B1 - Telescopic roller conveyor - Google Patents

Abstract

To provide a telescopic roller conveyor capable of quickly transferring luggage without falling down at a corner and smoothly transferring large luggage. An extendable roller conveyor is configured to transport a load 19 placed on the rollers 1 with a plurality of rollers 1 arranged side by side. Further, the telescopic roller conveyor is configured to be able to expand and contract by changing the distance between adjacent rollers, and also to change the distance between the rollers at both ends of the roller 1 to change from a linear arrangement to a curved arrangement, thereby changing the load 19. Is transported along a curved transport path 2. The roller 1 is configured to incline at a downward gradient from the far side where the roller interval is wide toward the approach side where the roller interval is narrow.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic roller conveyer for changing the distance between rollers to expand and contract the overall length.

[0002]

2. Description of the Related Art A telescopic roller conveyor becomes longer when the distance between adjacent rollers is increased, and becomes shorter when the distance between rollers is reduced. The roller conveyor having this structure can be conveniently used by setting the distance for transporting the luggage to an optimum length for the application. Further, the roller conveyor can change the transport path of the load from a straight line by changing the roller interval between both ends of the roller. The roller conveyor having this structure has a feature that, when there is an obstacle in the middle of the transport path, the roller conveyor can avoid the obstacle and transport the obstacle. Therefore, for various applications,
There is a feature that can be used more conveniently.

[0003]

However, if the load is transferred to a curved transport path, there is a disadvantage that the load easily drops from the transport path when passing the corner. That is, as shown in FIG.
This is because the centrifugal force (f) acts on. The centrifugal force (f) acting on the load 19 is inversely proportional to the radius of curvature (r) of the corner and proportional to the square of the velocity (v). Therefore, the centrifugal force (f) is proportional to v ² / r.

[0004] Since the centrifugal force increases in proportion to the square of the speed, when the speed at which the load is transported increases, the centrifugal force increases sharply, causing the load to drop from the rollers. For this reason, there is a problem in that it is not possible to transfer the load at a high speed when the transfer is performed with the transport path bent. Further, since the centrifugal force increases even when the radius of curvature of the corner decreases, there is a disadvantage that the radius of curvature cannot be reduced by sharply bending the conveying path.

[0005] The adverse effect that the load passing through the corner drops from the rollers can be eliminated by providing guide walls on both sides of the roller conveyor. This is because the guide wall prevents the load from falling. However, in the roller conveyor having this structure, the load to be transferred is transferred while contacting the guide wall at the corner. Luggage that comes into contact with the guide wall is not smoothly transported due to frictional resistance. Further, the roller conveyor of this structure has a drawback that it is not possible to transfer a large load protruding from the rollers. This is because the load passes between the guide walls provided on both sides. If the gap between the guide walls is widened to eliminate this drawback, a gap is created between the rollers and the guide walls. This gap causes small loads to fall when passing through the corner. For this reason, it is actually impossible to increase the distance between the roller and the guide wall.

[0006] The present invention has been developed with a view to solving such a drawback. An important object of the present invention is to provide a telescopic roller conveyor capable of transferring goods quickly so as not to fall at corners. Also,
Another important object of the present invention is to provide a telescopic roller conveyor capable of smoothly transferring a large load.

[0007]

The telescopic roller conveyor according to the present invention has the following configuration in order to achieve the above object. The telescopic roller conveyor is configured to convey a load 19 placed on the rollers 1 by arranging a plurality of rollers 1 side by side. Further, the telescopic roller conveyor is configured to be able to expand and contract by changing the distance between adjacent rollers, and also to change the distance between the rollers at both ends of the roller 1 to change from a linear arrangement to a curved arrangement, thereby changing the load 19. Is transported along a curved transport path 2. The roller 1 is configured to incline at a downward gradient from the far side where the roller interval is wide toward the approach side where the roller interval is narrow.

Furthermore, Shin contraction roller conveyor of the present invention, a plurality of rollers 1, via a link mechanism 3 are connected to be able to change the roller spacing.

[0009] In addition, Shin contraction roller conveyor of the present invention
It is the link mechanism 3 comprises an X link 4 which is connected to the X-shape so as to be pivotable intermediate two links by a pin 6. The plurality of X-links 4 are connected at upper and lower ends via pins 6 . The roller 1 is connected to the upper end connecting portion of the X link 4, or the roller 1 is connected to the upper end of an extension 4A extending further upward from the upper end connecting portion of the X link 4.

Further, in the telescopic roller conveyor according to the third aspect of the present invention, a chevron link 15 that can be bent in the middle is connected to a lower end connecting portion of the X link 4.
The middle bent portion of the chevron link 15 is connected to the lower part of the telescopic leg 10. In this telescopic roller conveyor, when the X link 4 is rotated so that the roller interval is reduced, the intermediate bent portion of the chevron link 15 rises, and the rising intermediate bent portion raises the lower part of the telescopic leg 10. Thus, the telescopic leg 10 is configured to be short.

Further, the extension according to claim 4 of the present invention.
The retractable roller conveyor can extend and retract the telescopic legs 10
A structure in which an elastic telescopic rod 12 is built in a tube 11;
are doing.

Further, the extension according to claim 5 of the present invention.
The reduction roller conveyor has a self-propelled drive at the end of the X-link 4.
The moving device 17 is connected. Claims of the present invention
Item 6. The telescopic roller conveyor according to item 6,
7 is provided with a fork 18 which moves up and down,
Pick up your luggage and place it on roller 1
Supply or the luggage sent from roller 1
Put it on the fork 18 and carry it out to the predetermined position
I have.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate a telescopic roller conveyor for embodying the technical idea of the present invention, and the present invention does not specify the telescopic roller conveyor as follows.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”. However, the members described in the claims are not limited to the members of the embodiments.

The telescopic roller conveyor shown in FIGS. 1 and 2 transports a load placed on the rollers 1 with a plurality of rollers 1 arranged side by side. Further, the telescopic roller conveyors shown in these figures can change the distance between adjacent rollers so as to be able to expand and contract as shown in FIGS. Further, as shown in FIG. 3, the telescopic roller conveyor changes the roller interval between both ends of the roller 1 to change the arrangement from a linear arrangement to a curved arrangement so that the luggage can be transferred on the curved transport path 2. I have to. In FIG. 3, the conveyance path 2 is curved by increasing the roller interval on one side of the roller 1 and narrowing the roller interval on the other side.

In the telescopic roller conveyor shown in these figures, as shown in FIGS. 1 and 4, a plurality of rollers 1 are connected via a link mechanism 3 having a pantograph structure so that the roller interval can be changed. . This link mechanism 3
Is provided with an X-link 4 that connects the middle of two main links 5 in an X-shape so that the center can be rotated by a pin 6. The two main links 5 have the same length, and the center is connected by a pin 6 to form an X link 4. The plurality of X links 4 are connected so that the upper and lower ends can be rotated by pins 6, and the roller 1 is connected to the upper end connecting portion of the X link 4. The upper end connecting portion of the X link 4 supports a rotation shaft 8 of the roller 1 via a ball joint bearing 7 in order to rotatably support the roller 1 in an inclined posture.

Further, in the roller conveyor shown in the figure, a sub-link 9 is connected between the valleys of the X-link 4 in order to reduce the roller interval, and the roller 1 is connected to an upper end connecting portion of the sub-link 9. The rollers 1 connected to the upper link of the X link 4 and the sub link 9 are arranged on the same horizontal plane. The sub-link 9 has an upper end pivotally connected via a pin 6 and is connected in an inverted V-shape. The total length of the sub-link 9 is one-fourth of the total length of the main link 5 and is connected to the center of the intermediate connecting pin 6 and the upper end connecting portion of the main link 5 via the pin 6 so that the lower end can rotate. I have. The roller conveyer connecting the sub-links 9 between the valleys of the X-links 4 can narrow the interval between the rollers 1 and smoothly transfer small loads.

In the telescopic roller conveyor shown in FIGS. 6 to 8, a plurality of rollers 1 are connected via a link mechanism 3 having a pantograph structure, as in FIGS. 1 and 4.
It is connected so that the roller interval can be changed. The link mechanism 3 includes an X link 4 that connects the middle of the two main links 5 in an X shape so as to be able to rotate with a pin 6. 2
One of the main links 5 of the book is longer than the other, and the central portion is connected by a pin 6 to form an X link 4. The plurality of X links 4 are connected so that upper and lower ends can be rotated by pins 6. The long link has an extension 4A extending further upward from the upper end connection portion, and connects the roller 1 to the upper end of the extension 4A. The upper end connecting portion of the X link 4 is connected via a pin of a joint ball.

Further, in the roller conveyor shown in the figure, a sub-link 9 is connected between the valleys of the X-link 4 in order to reduce the roller interval, and this sub-link 9 is also protruded from the upper end connecting portion by making one of the sub-links 9 longer. An extension 9A is provided, and the roller 1 is connected to the upper end of the extension 9A. The roller 1 connected to the X link 4 and the upper end of the extension 4A, 9A of the sub-link 9 is disposed on the same horizontal plane. The sub-link 9 has an upper end portion rotatably connected via a pin 6 and is connected in an inverted V-shape.

An extendable leg 10 is connected to the link mechanism 3. The link mechanism 3 rotates the X link 4 to extend and retract the extendable leg 10. When the telescopic leg 10 expands and contracts, the roller 1 is inclined downward from the far side to the near side. When the roller interval is changed by the link mechanism 3,
The telescopic leg 10 is expanded and contracted in conjunction with the link mechanism 3.

The telescopic leg 10 is, as shown in FIGS.
The upper end is connected to the upper end connecting portion of the X link 4. The telescopic leg 10 has an elastic telescopic rod 12 built in a double cylinder 11 that can expand and contract. As the elastic telescopic rod 12, a rod that elastically expands, for example, a rod having a built-in pressing spring such as a gas spring or a coil spring can be used. The double cylinder 11 has a lower end connected to a wheel 13 that can rotate in a horizontal plane and move in a free direction.

The roller conveyor shown in the figure has an X-link 4 and an extendable leg 10 connected by an extendable mechanism 14 in order to extend and retract the extendable leg 10 by changing the roller interval. The expansion / contraction mechanism 14 includes a chevron link 15 and a connecting rod 1 for connecting an intermediate bent portion of the chevron link 15 to a lower portion of the telescopic leg 10.
6 is provided.

The angle link 15 is connected to the two links so that the link can be bent, and the lower end thereof is connected to the lower end of the X link 4.
They are connected via a pin 6 so as to be rotatable. The roller conveyor shown in FIG.
Connected to the lower ends of the two main links 5 connected in the shape of a letter,
At the upper end of the main link 5 connected in an inverted V-shape, a telescopic leg 1
0 is connected at the upper end.

The angled link 15 has a length that makes the middle bent portion higher than both ends even in a state where the interval between the lower ends of the X link 4 is widest, in other words, in a state where the roller interval is the longest. This is because when the distance between the rollers 1 is reduced to bring the both ends of the angled link 15 closer to each other, the intermediate bent portion is raised.

FIGS. 5 and 8 show a state in which the intermediate bent portion of the chevron link 15 is in the raised position, and FIGS. 5 and 8 show a state in which the intermediate bent portion is in the lowered position. Yamagata Link 1
The middle bent portion 5 is connected to a lower portion of the telescopic leg 10 by a connecting rod 16 extending vertically. Therefore, when the intermediate bent portion rises, the telescopic leg 10 is contracted as shown on the left side of FIGS. When the intermediate bent portion descends, the telescopic leg 10 is extended as shown on the right side.

The telescopic mechanism 14 having the above-described structure performs the following operations to extend and retract the telescopic leg 10. When the distance between the rollers 1 is reduced and the roller 1 is approached, the X link 4 tilts from the position shown in FIG. 1 in the vertical direction as shown in FIG. When the X-link 4 tilts in the direction shown in FIG. 2, the lower end of the X-link 4 moves along the trajectory shown by the dashed line in FIG. This locus is an arc centered on the upper end connecting portion of the X link 4. When the lower ends of the X-links 4 move along this locus and approach each other, the intermediate bent portion of the chevron link 15 rises in the vertical direction. Since the intermediate bent portion of the chevron link 15 is connected to the lower portion of the telescopic leg 10 via the connecting rod 16, when the intermediate bent portion rises, the telescopic leg 1 is moved.
Then, the lower part of 0 is pulled up, and the telescopic leg 10 is contracted and shortened. The telescopic leg 10 causes the wheel 13 at the lower end to travel on the road surface.

As described above, the shorter the distance between the rollers, the shorter the telescopic leg 10 becomes. For this reason, as shown in FIG. 3, when the roller interval is increased at one end of the roller 1 and the roller interval is decreased at the other end of the roller 1,
The approach-side telescopic leg 10 in which the roller interval is narrower is shorter than the remote-side telescopic leg 10 in which the roller interval is widened,
The roller 1 is inclined downward from the far side to the near side.

The extension mechanism 14 can incline the roller 1 with a simple mechanism in a downward gradient from the far side to the near side. However, the telescopic roller conveyor of the present invention does not specify the telescopic mechanism in the above structure. Any mechanism capable of tilting the roller from the away side to the approach side depending on the roller interval can be adopted. For example, the distance between the rollers can be detected by a distance sensor, and the extendable leg can be expanded and contracted by a signal from the distance sensor, so that the roller can be inclined from the away side to the approach side. In this mechanism, the telescopic leg is extended and retracted by an electric cylinder that can be extended and retracted by an electric signal.

Further, the telescopic roller conveyor shown in FIGS. 1 and 2 has a self-propelled driving device 17 connected to one end. The driving device 17 includes a fork 18 that moves up and down. The fork 18 lifts the luggage and supplies the luggage onto the roller 1, or places the luggage sent from the roller 1 on the fork 18 and carries it out to a predetermined position.

Furthermore, in the telescopic roller conveyor, a motor can be connected to the rotating shaft 8 of the roller 1 and the load can be forcibly moved by rotating the roller 1 with the motor.

[0031]

The telescopic roller conveyor according to the present invention has a feature that it can transfer a load at a high speed and prevent it from dropping at a corner. This is because the telescopic roller conveyor of the present invention inclines the rollers arranged at the corners of the transport path in a downward gradient from the separated side having a large roller interval to the approach side having a small roller interval.

FIG. 9 shows a state where the load is sent on the inclined roller in this state, and FIG. 10 shows a state where the load is sent on the conventional horizontal roller. In FIG. 10, gravity (W) and centrifugal force (f) act on a load 19 moving in a corner. The centrifugal force (f)
And acts in a direction in which the load 19 slides down from the roller 1. As described above, since the centrifugal force (f) is proportional to v ² / r, the centrifugal force (f) rapidly increases as the speed at which the load 19 is transferred is increased. In addition, even if the radius of curvature of the corner is reduced, the radius of curvature increases. When the centrifugal force (f) becomes larger than the frictional resistance between the load 19 and the roller 1, the load 19 slips in a direction parallel to the roller 1 and falls off the roller 1.

The telescopic roller conveyor of the present invention uses a roller 1 as shown in FIG.
Is inclined at the corner. The load 19 placed on the inclined roller 1 is subjected to gravity (W) vertically downward. This gravity (W) is the horizontal component (W) parallel to the roller.
1) and a vertical component (W2) perpendicular to the roller. The horizontal component (W1) is the horizontal component (f) of the centrifugal force (f).
Acts in the opposite direction to 1). Therefore, the horizontal component (W
When 1) is equal to the horizontal component (f1) of the centrifugal force (f), the force of the load 19 to drop from the roller 1, that is, the force in the horizontal direction on the roller 1 does not work at all. However, the telescopic roller conveyor of the present invention,
The horizontal component (W1) does not necessarily have to be exactly equal to the horizontal component (f1) of the centrifugal force (f). Horizontal component (W
1) always acts in the direction opposite to the horizontal component (f1) of the centrifugal force (f) to substantially weaken the centrifugal force (f) and reduce the load from falling off the rollers. It is.

As described above, the telescopic roller conveyor of the present invention can substantially reduce the centrifugal force of the luggage moving in the corner, so that the centrifugal force does not exceed the frictional resistance between the luggage and the rollers, and the luggage can be transported. By moving to the corner at high speed, it can be effectively prevented from slipping off the rollers. Further, since the horizontal component of the centrifugal force is reduced by inclining the roller, there is no need to provide a guide wall or the like unlike a conventional telescopic roller conveyor. For this reason, large luggage etc.
The feature is that it can be transferred smoothly and at high speed.

[Brief description of the drawings]

FIG. 1 is a side view showing an extended state of a telescopic roller conveyor according to an embodiment of the present invention.

FIG. 2 is a side view showing a state where the telescopic roller conveyor shown in FIG. 1 is contracted.

FIG. 3 is a plan view showing a state where the telescopic roller conveyor according to the embodiment of the present invention is curved.

FIG. 4 is an enlarged side view showing a telescopic mechanism of the telescopic roller conveyor according to the embodiment of the present invention.

FIG. 5 is an enlarged sectional view showing a telescopic mechanism of the telescopic roller conveyor according to the embodiment of the present invention.

FIG. 6 is an enlarged side view showing a telescopic mechanism of a telescopic roller conveyor according to another embodiment of the present invention.

FIG. 7 is an enlarged side view showing a contracted state of the telescopic roller conveyor shown in FIG. 6;

FIG. 8 is an enlarged cross-sectional view showing a telescopic mechanism of the telescopic roller conveyor shown in FIGS. 6 and 7.

FIG. 9 is a cross-sectional view illustrating a state in which a load is transferred on the inclined roller of the telescopic roller conveyor according to the embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a state in which goods are transferred on horizontal rollers of a conventional roller conveyor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Roller 2 ... Conveying path 3 ... Link mechanism 4 ... X link 4A ... Extension part 5 ... Main link 6 ... Pin 7 ... Bearing 8 ... Rotating shaft 9 ... Sub link 9A ... Extension part 10 ... Telescopic leg 11 ... Double cylinder DESCRIPTION OF SYMBOLS 12 ... Elastic telescopic rod 13 ... Wheel 14 ... Telescopic mechanism 15 ... Yamagata link 16 ... Connecting rod 17 ... Drive device 18 ... Fork 19 ... Luggage

Claims (6)

(57) [Claims] A plurality of rollers (1) are arranged side by side to convey a load (19) placed on the rollers (1), and the distance between adjacent rollers can be changed so as to be able to expand and contract. Further, the distance between the rollers at both ends of the roller (1) is changed so that the arrangement is changed from a linear arrangement to a curved arrangement, so that the load (19) can be transferred on a curved transport path (2). in stretching roller conveyor comprising Te, roller (1) is arranged to tilt from a wide apart side of the roller gap in downward slope toward the narrow access side of the roller gap Rutotomoni plurality of rollers (1), 2 Book
Linked in an X-shape so that the middle of the link can be rotated with the pin (6)
The X-links (4) at the top and bottom ends with the pins (6).
Roller via link mechanism (3)
Linked so that the interval can be changed, and this link machine
Structure (3) has wheels (13) at the lower end and is extendable
The telescopic legs (10) are connected, and the rollers are linked by the link mechanism (3).
When the distance is changed, the telescopic legs are linked to the link mechanism (3).
An extendable roller conveyor characterized in that (10) is configured to expand and contract. 2. A roller (1) is connected to an upper end connecting portion of the X-link (4).
Or the roller (1) at the upper end of the extension (4A) extending further upward from the upper end connection of the X-link (4).
2. The telescopic roller conveyor according to claim 1 , wherein 3. An X-link (4) is connected to a lower end connecting portion with an intermediate bendable link (15) which can be bent in the middle.
The middle bent part of (15) is connected to the lower part of the telescopic leg (10),
When the X-link (4) is rotated so that the rollers are close to each other, the middle bend of the chevron link (15) rises, and the rising middle bend raises the lower part of the telescopic leg (10). Telescopic legs
The telescopic roller conveyor according to claim 2 , wherein (10) is shortened. 4. The telescopic leg (10) is a telescopic double cylinder (11).
Claims with built-in elastic telescopic rod (12) inside
Item 7. An extendable roller conveyor according to Item 3. 5. A self-propelled drive at the end of the X-link (4)
The telescopic roller according to claim 1, which is connected to (17).
Conveyor. 6. A driving device (17) for moving up and down.
(18), and carry the luggage with the fork (18).
And feed it onto the roller (1), or
ー Place the luggage sent from (1) on the fork (18)
The telescopic roller according to claim 5, which is carried out to a fixed position.
Conveyor.