JPH072320U - Accumulation conveyor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an accumulation conveyor having a simple structure and capable of easily changing the transfer speed. [Structure] Below a conveyor roller 3 rotatably arranged side by side on a frame 2, a swing support plate 6 swingably attached to a support shaft 5 projecting from the frame is provided at approximately three corners. A first roller 10, a second roller 11 symmetrical to the first roller, a third roller 12 coaxially with the second roller, and a fourth roller 12 which makes a rolling contact with the third roller.
Roller 13 is rotatably provided, an endless belt 4 is disposed on the first roller and the second roller, and the swing support plate is provided below the first roller mounting position of the swing support plate. An actuator 14 having three positions for oscillating the conveyor is provided, and an elastic support member 16 for urging the oscillating support plate in a certain direction is provided, and the actuator 14 selectively conveys the conveyor by a first roller or a fourth roller. It is characterized in that the roller is rotated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller conveyor used to convey articles, and more particularly, to an accumulation conveyor that is capable of converting a conveying speed by transmitting a rotational force from a rotational power source.

[0002]

[Prior art]

 Conventionally, the rotational force from a rotational power source such as a motor is transmitted to individual transport rollers forming a transport surface via, for example, a belt or a chain, so that the transport rollers are driven and placed on the rollers. Roller conveyors are known which are adapted to convey stored articles. This roller conveyor includes a so-called accumulation conveyor capable of temporarily stopping an article to be conveyed at a predetermined position on the roller conveyor or sending out the stopped article at a predetermined interval. In this accumulation conveyor, it is necessary to rotate a predetermined roller or to stop its rotation.Therefore, for example, a clutch or the like is provided between the transport roller and the drive system to positively apply the rotational force. In addition, the transfer roller and the drive belt are frictionally engaged with each other and the contact between the transfer roller and the drive roller is released so that the transfer roller is rotated. Various configurations such as a configuration for stopping are adopted.

[0003]

[Problems to be solved by the device]

 However, in the conventional accumulation conveyor, generally, when changing the transfer speed, it was necessary to change the drive speed of the drive system, and the configuration of the drive system itself had to be changed. Furthermore, in the past, the device for finely adjusting the article transportation by changing the rotation speed of each transportation roller has not been put into practical use because the configuration and control thereof are complicated. . The present invention has been made in view of the above-mentioned circumstances, and the purpose thereof is that it is not necessary to take an individual structure according to the transportation speed, and a simple structure and a complicated adjustment work are almost required. It is an object of the present invention to provide an accumulation conveyor capable of reliably stopping the articles and easily changing the transfer speed without the need.

[0004]

[Means for Solving the Problems]

 The object of the present invention is to convey a conveyor roller which is rotatably supported by a frame and conveys an article, and an endless roller which is hung along the frame under the roller to rotate the conveyor roller in a certain direction. A power transmission member, a first roller located on the inner surface side of the power transmission member to bring the power transmission member into contact with or away from the conveyor roller, and an outer surface of the belt below the power transmission member. A second roller that is in contact with and separated from the third roller, a third roller that is provided coaxially with the second roller, and a roller roller that is rotated in contact with the outer periphery of the third roller and contacts the conveyor roller. The fourth roller that is in a state of being separated or separated from each other, and the fourth supporting roller is rotatably held and is swingably mounted about a supporting shaft; An elastic supporting member that urges the actuator, and an actuator that causes the oscillating supporting plate to oscillate against the urging of the elastic supporting member, wherein the conveyor roller is at least responsive to an operation amount of the actuator. The present invention is achieved by an accumulation conveyor characterized in that it is configured to change between a state driven by a first roller and a state driven by the fourth roller. A similar object of the present invention is to contact the outer circumference of the conveyor roller when the first roller and the second roller on the swing support plate are not in contact with the power transmission member. It is also achieved by an accumulation conveyor characterized in that a brake member is provided on the swing support plate.

[0005]

[Action]

 In the accumulation conveyor of the present invention having the above structure, the first roller is pressed against the power transmission member by applying pressure to the actuator to push up the power transmission member to bring the power transmission member into contact with the conveyor roller and rotate the conveyor roller. Then, the article is conveyed. Next, by changing the operation amount of the actuator, the first roller is separated from the power transmission member by the operation of the elastic support member to stop the conveyor roller. Further, at this time, the brake member provided on the swing support plate may be brought into contact with the conveyor roller when the conveyor roller is a free roller (in a non-driven state), and the conveyor roller may be stopped suddenly. Further, by depressurizing the actuator, the swing support plate is swung by the urging of the elastic support member, and the second roller side comes into contact with the power transmission member, so that the fourth roller passes through the third roller. Since the roller rotates and the rotated fourth roller is brought into contact with the conveyor roller, the rotation speed of the conveyor roller can be changed by appropriately changing the diameter of each roller.

[0006]

【Example】

 Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a perspective view of a main part of the accumulation conveyor, and FIGS. 2 to 4 are side views showing various operating positions of the accumulation conveyor. In FIG. 1, an accumulation conveyor 1 is rotatably installed in a direction perpendicular to the frame 2 above a frame 2 which is erected in parallel to the left and right, and is installed side by side at predetermined intervals. 3, an endless power transmission member 4 such as a belt that is hung along the frame 2 with a slight gap below the conveyor roller 3, and inside the power transmission member 4 along the frame 2. Further, a supporting shaft 5 projecting in a direction perpendicular to the frame 2 below one conveyor roller 3 is provided with a rocking supporting plate 6 provided for rocking. The rocking support plate 6 is disposed under each roller so as to correspond to the plurality of conveyor rollers 3 in a one-to-one relationship (one of which is shown in FIG. 1). The swing support plate 6 is a plate member having a substantially rectangular shape, and support shafts 7, 8 and 9 are provided at two upper portions and one lower portion on one side among the four corners. The support shaft 7 extends toward the front side of the swing support plate 6, and a first roller 10 is rotatably mounted on the support shaft 7. The outer peripheral surface of the first roller 10 is the power transmission member. It is provided at a position corresponding to the lower surface on the upper side of 4. A support shaft 9 provided at a position symmetrical to the support shaft 7 penetrates the swing support plate 6 and extends to the front side and the back side, and is rotatable relative to the swing support plate 6. It is mounted as a current support shaft 9. A second roller 11 having a smaller diameter than the first roller 10 is fixed to the front side of the support shaft 9, and the outer peripheral surface of the second roller 11 is the lower surface of the lower side of the power transmission member 4. It is provided at the position corresponding to.

At the inner side of the support shaft 9 provided with the second roller 11, there is provided a third roller having the same diameter as the first roller 10 and having an outer peripheral surface formed of a high-friction member which easily makes a rolling contact. 12 is fixed, and the third roller 12 is provided so as to be simultaneously rotated in the same direction via the support shaft 9 according to the rotation of the second roller 11. The support shaft 8 at the upper corner of the rocking support plate 6 provided with the support shaft 9 is a support shaft 8 provided only in the rearward direction of the rocking support plate 6, and the support shaft 8 has A fourth roller 13 is provided rotatably in contact with the third roller 12 in a rolling contact. Below the remaining one corner of the swing support plate 6 provided with the above-mentioned first roller 10, second roller 11, third roller 12 and fourth roller 13 (mounting side of the first roller 10) On the lower side, an actuator 14 that rotates upward about the support shaft 5 of the swing support plate 6 is mounted on a base 15 fixed to the frame 2. An elastic support member 16 composed of a tension spring is installed between the base 15 to which the actuator 14 is fixed and the swing support plate 6, and the first roller 10 of the swing support plate 6 is provided with an elastic support member 16. The lower end face is always biased to the actuator 14. The actuator 14 is formed to have three positions by switching a valve from an air source provided outside. That is, it is possible to take a position 1 in which the pressure is completely reduced, a position 2 in which only one stage is pressurized, and a position 3 in which both stages are pressurized.

In the accumulation conveyor 1 configured as described above, when the actuator 14 is set to the position 2, as shown in FIG. 2, the first roller 10 swings and supports about the supporting shaft 5 as a center. When the plate 6 swings counterclockwise, it contacts the lower side surface of the power transmission member 4. When the power transmission member 4 is driven in the direction of arrow A in this state, only the first roller 10 is brought into an idling state due to the rolling contact with the power transmission member 4, and the conveyor roller 3 is kept in a stopped state and is ready for conveyance. It becomes a stage. In this state, when the actuator 14 is next pressed to set the position 3, the swing support plate 6 swings counterclockwise about the support shaft 5 as shown in FIG. Pushes up the power transmission member 4 to bring the upper surface side of the power transmission member 4 into contact with the conveyor roller 3 to rotate the conveyor roller 3. As a result, the article placed on the conveyor roller 3 is conveyed in the direction opposite to the traveling direction of the power transmission member 4. In order to stop the conveyance of the article being conveyed in the above-mentioned state, the pressure at the second stage side of the actuator 14 is released so that the actuator becomes the position 2 and the swing support plate 6 becomes the elastic support member 16. By the action, it is returned in the clockwise direction, returns to the state shown in FIG. 2, and the conveyor roller 3 naturally stops.

Further, when the pressure applied to the actuator 14 is stopped and the pressure is completely reduced to set the position 1, the swing support plate 6 is pulled by the elastic support member 16 to center the support shaft 5 as shown in FIG. As a result, the first roller 10 is separated from the lower surface of the power transmission member 4 and stops. At the same time, the second roller 11 provided at the symmetrical position of the first roller 10 comes into contact with the lower surface side of the lower stage of the power transmission member 4, receives the traveling in the direction of arrow B, and moves counterclockwise. Rotate by rolling contact. This counterclockwise rotation causes the third roller 12 to rotate clockwise through the support shaft 9, and the fourth roller 13 that is in rolling contact with the third roller 12 to rotate clockwise. Let Since the fourth roller 13 is in contact with the outer circumference of the conveyor roller 3 by the rocking of the rocking support plate 6, the conveyor roller 3 is rotated in the same direction as in the case of FIG. 3 and conveys the article in the same direction. be able to. However, since the second roller 11 has a smaller diameter than the first roller 10 in this transportation, the transportation speed of the article is increased, so that the transportation speed of the article can be increased.

If the swing support plate 6 described above is provided below the respective rollers of the conveyor rollers 3 arranged side by side on the frame 2, the accumulation conveyor 1 can simply switch the pressure applied to the actuator. It is possible to stop the conveyor roller 3, feed at a constant speed or fast-forward. Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6 both show that the swing support plate 6 of the first embodiment described above is provided with a brake member, and the addition of this brake member causes each roller to be stopped suddenly. In FIG. 5, the brake member 17 includes a brake arm 18 rotatably provided on the support shaft 7 of the swing support plate 6, a coil spring 19 for biasing the brake arm 18 in a clockwise direction, and a brake arm 18. It is constituted by a pin member 20 extending from the frame side that restricts movement. The brake arm 18 is provided with a rubber brake shoe 21 at its tip, and an engagement protrusion 22 that engages with the pin member 20 when the actuator 14 is in position 2 is provided on the upper end surface of the brake arm 18. Therefore, engaging recesses 23 that engage with the pin member 20 are provided on both left and right sides of the engaging protrusion 22.

In the brake member 17 configured as described above, when the actuator 14 is in the position 2, the power transmission member 4 is not in contact with the conveyor roller 3, and the engaging protrusion 22 of the brake arm 18 has the pin member 20. The brake shoe 21 provided at the tip of the brake arm 18 contacts the outer peripheral surface of the conveyor roller 3 to forcibly stop the rotation of the conveyor roller 3. Next, when the actuator 14 is set to the position 3, the first roller 10 side swings and is pushed up, so the brake arm 18 pushes the brake shoe 21 side downward against the bias of the coil spring 19. , The contact between the brake shoe 21 and the conveyor roller 3 is released, and the brake arm 18 locks the pin member 20 in the lower engaging recess 23 to hold the brake 21 at a position where it does not completely contact the conveyor roller 3. To do. At the same time, the first roller 10 pushes up the power transmission member 4 to rotate the conveyor roller 3. When the actuator 14 is set to the position 1, the elastic support member 16 urges the swing support plate 6 to bring the fourth roller 13 into contact with the conveyor roller 3. At this time, the brake arm 18 moves the coil spring 19 to It is lifted upward by a biasing force, and the pin member 20 is locked to the upper side of the engaging recess 23 to hold the brake shoe 21 apart from the conveyor roller 3.

FIG. 6 shows a modification of the brake member 17. The brake member 17A of this modification is configured such that a part of the swing support plate 6 shown in FIG. 2 to which the fourth roller 13 is attached is extended to the center of the adjacent conveyor rollers 3 to brake. A swing support plate 6A provided with an arm 18A is provided, and a brake shoe 21 that contacts the conveyor roller 3 (when in position 2) is provided at the tip of the brake arm 18A. The structure of the part is similar to that shown in FIGS. When the actuator 14 is in position 2, the brake member 17A stops the brake shoe 21 by contacting the adjacent conveyor roller 3, and when the actuator 14 is in position 3, the brake arm 18A moves counterclockwise to break the brake. Is released, and when in position 1, the brake shoe 21 is released upward by being moved clockwise. By providing the brake member 17 or 17A described above, the conveyor roller 3 is immediately stopped, and the next operation can be immediately started when the position of the actuator 14 is changed. In the above embodiment, the power transmission member 4 is a belt, but the power transmission member 4 is not limited to this. For example, a member such as a rope, a wire or a chain may be used. Further, depending on the power transmission member, various members related thereto can be appropriately changed. Although the elastic supporting member 16 is a tension spring, a compression spring may be used depending on the position where the tension spring is provided, or a member such as an air cushion may be used.

[0013]

[Effect of device]

 As described above in detail, the accumulation conveyor according to the present invention includes the first and second rollers, which are provided on the swing support plate and have different diameters, on the right and left sides of the support shaft that swing-supports the swing support plate. It is provided in a symmetrical manner on the side, and the swing support plate is swung by an actuator so that the conveyor roller is driven by the action of either the first roller or the second roller. With this structure, the conveyor roller transfer speed can be changed extremely quickly and easily, and in the structure with the brake member, the conveyor rollers can be stopped without fail, and the setting of the article delivery interval can be adjusted. In addition to being extremely advantageous in such cases, the versatility of the conveyor can be enhanced and cost reduction can be realized.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a main part of an accumulation conveyor showing a first embodiment of the present invention.

2 is a side view showing a state of position 1 in the accumulation conveyor of FIG. 1. FIG.

3 is a side view showing a state of position 2 in the accumulation conveyor of FIG. 1. FIG.

4 is a side view showing a state of position 3 in the accumulation conveyor of FIG. 1. FIG.

FIG. 5 is a side view of a main part of an accumulation conveyor according to a second embodiment of the present invention.

FIG. 6 is a side view of a main part of an accumulation conveyor showing a modified example of the second embodiment of the present invention.

[Explanation of symbols]

 1 Accumulation Conveyor 2 Frame 3 Conveyor Roller 4 Power Transmission Member 5 Support Shaft 6 Swing Support Plate 10 First Roller 11 Second Roller 12 Third Roller 13 Fourth Roller 14 Actuator 16 Elastic Support Member 17 Brake Member

Claims (2)

[Scope of utility model registration request] 1. A conveyor roller (3) rotatably supported by a frame (2) to convey an article, and a frame (2) below the roller to rotate the conveyor roller (3) in a fixed direction. An endless power transmission member (4) that is laid along and a power transmission member located on the inner surface side of the power transmission member (4) in contact with or separated from the conveyor roller (3) First roller (10) to be used, and the power transmission member
A second roller (11) that is in contact with and separated from the outer surface of the belt on the lower side of (4), a third roller (12) provided coaxially with the second roller (11), and a third roller (12). A fourth roller (13) which is rotated in contact with the outer periphery of the roller (12) and is brought into contact with or separated from the conveyor roller (3).
And rotatably holding each of them and a swing support plate (6) mounted swingably around a support shaft (5), and an elastic support for urging the swing support plate (6) in a certain direction. The member (16) and the swing support plate against the bias of the elastic support member (16).
(6) an actuator (14) for swinging the conveyor roller, and the conveyor roller (3) at least according to the operation amount of the actuator (14).
The accumulation conveyor (1), which is configured to change between a state driven by the roller (10) and a state driven by the fourth roller (13). 2. The conveyor roller when the first roller (10) and the second roller (11) on the swing support plate (6) are not in contact with the power transmission member (4). The accumulation conveyor (1) according to claim 1, wherein a brake member (17) contacting the outer periphery of (3) is provided on the swing support plate (6).