JPH0516715U - Roller conveyor - Google Patents

Abstract

(57) [Abstract] [Purpose] A drive transmission system is provided, which reliably transmits the start and stop of the drive unit to the rollers. A roller 3, a driving belt whose diameter is varied by air pressure between a rotatable roller 3 for conveying a conveyed object and a driving belt 5 arranged along the roller 3 and driven to move by a driving unit 6. Rotatable clutch part 4 which comes in contact with and separates from
To provide. The drive transmission system is connected or disconnected by increasing or decreasing the diameter of the clutch portion 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a roller conveyor. More specifically, it relates to an improvement in transmission performance of a drive transmission system that utilizes frictional force of a roller conveyor.

[0002]

[Prior Art]

 Conventionally, as a roller conveyor, for example, a rotatable roller that is arranged in parallel in the feed direction of the conveyed object to form the conveying surface of the conveyed object, and a roller side that is arranged along the arranged direction of the roller and is moved by movement. It is known that a driving belt that rotates a roller by a frictional force of direct pressure contact and a driving unit such as an electric motor that moves and drives the driving belt are provided.

[0003] In this conventional roller conveyor, the drive transmission system between the roller and the drive unit is configured by frictional force, and the drive transmission system is slipped against a sudden load applied to the roller to protect the drive unit and the like. You can do it.

[0004] In such a conventional roller conveyor, when the drive unit is started or stopped, slippage occurs in the drive transmission system, particularly when a certain amount of load is applied to the drive transmission system such as a conveyed object placed on the roller. However, there is a problem in that the start and stop of the drive unit cannot be reliably transmitted to the roller.

[0005]

[Problems to be solved by the device]

 The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a roller conveyor having a drive transmission system utilizing frictional force, in which start and stop of a drive unit are accurately transmitted to a roller. ..

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the roller conveyor according to the present invention employs the following means.

That is, according to the first aspect of the present invention, there are provided a rotatable roller which is arranged in parallel in the feed direction of the conveyed object and forms a conveying surface of the conveyed object, and a roller side which is arranged along the direction in which the rollers are arranged and is moved by the movement. In a roller conveyor including a drive belt that rotates a roller by frictional force and a drive unit that moves and drives the drive belt, the diameter of the roller and the drive belt is changed by air pressure between the roller and the drive belt. It is characterized in that it has a rotatable clutch part that comes in and out of contact with.

According to a second aspect of the present invention, in the roller conveyor according to the first aspect, the clutch portion is formed of a rubber material including a roller and a rotary shaft in which an air passage is provided in parallel with the driving belt and an inside thereof, and a cord. It is characterized by comprising an expansion / contraction part mounted around the rotation axis.

[0009]

[Action]

 According to the above-mentioned means, in claim 1, the diameter is enlarged when the air is pressure-fed to the clutch portion, and the drive transmission system is connected to the roller and the drive belt in pressure contact, and the diameter is reduced when the pressure-feeding of the air to the clutch portion is stopped. Then, the drive transmission system is cut off from the rollers and drive belt, and the pressure of the air that is pumped to the clutch is adjusted.Adjust the pressure contact force to the roller and drive belt in the clutch to adjust the connection strength of the drive transmission system. Since the drive force can be varied, it is possible to effectively prevent the drive transmission system from slipping when the drive unit is started or stopped.Therefore, it is possible to use the frictional force that reliably transmits the start and stop of the drive unit to the rollers. The problem of providing a roller conveyor with a drive train is solved.

[0010] Further, in the second aspect, in the operation of the first aspect, the expansion / contraction of the diameter of the clutch portion is changed by the expansion / contraction portion formed of a rubber material or the like mounted around the rotary shaft and having a built-in cord. The expansion and contraction with a uniform diameter around the rotation axis is surely performed.

[0011]

Embodiment An embodiment of the roller conveyor according to the present invention will be described below with reference to the drawings.

1 to 4 show a roller conveyor according to a first embodiment of the present invention.

In this embodiment, as shown in FIGS. 3 and 4, the conveyance surface C of the conveyance object P is set at a relatively high position from the floor surface F.

In this embodiment, a roller 3, a clutch portion 4, and a drive belt 5 are arranged in order from the upper side on a frame 2 which is supported at a relatively high position from a floor surface F by legs 1 and arranged on both sides in the length direction. , A drive unit 6 is equipped.

[0015] The roller 3 is a support shaft 31 that is hung on both sides of the frame 2 and is supported so as to be vertically movable with respect to the frame 2, and a cylindrical roller cylinder that is fitted to the outside of the support shaft 31 with a gap. And a bearing 33 that is interposed between the support shaft 31 and the roller cylinder 32 and rotatably supports the roller cylinder 32 with respect to the support shaft 31. As shown in FIGS. 2 to 4, a large number of rollers 3 are arranged in parallel in the length direction of the frame 2 (feeding direction of the conveyed product P) at equal intervals. Forms a conveying surface C of the conveyed object P.

The clutch unit 4 is rotatably supported by the frame 2 below the roller 3 in a posture parallel to the axis of the roller 3, an air passage 41a is provided inside, and an air hole 41b is opened from the inside to the outside. The rotating shaft 41, a tire-shaped rubber material expanding / contracting portion 42 capable of enlarging and reducing its diameter by the internal air pressure burnt and attached in communication with the air hole 41b around the rotating shaft 41, and the rotating shaft 41. And a bearing 43 for rotatably supporting the frame 2 on the frame 2. As shown in FIGS. 2 and 4, the clutch portion 4 is located only on one side below the center line of two adjacent rollers 3 and is arranged in parallel in the longitudinal direction of the frame 2 at equal intervals. The diameters of the expanding / contracting portions 42 are arranged in parallel, and simultaneously press the roller cylinders 32 of the two adjacent rollers 3. An air supply pipe 7 communicating with an air compressor (not shown) is connected to the rotating shaft 41 of the clutch portion 4, that is, to the clutch portion 4 including an air passage 41a and an air hole 41b on the rotating shaft 41. Since a part of the air supply system is incorporated, the structure of the air supply system to the clutch portion 4 is made compact.

The drive belt 5 has a roller 3 and an upper surface 51a that is parallel to the axis of the clutch unit 4, and is a belt that is endlessly arranged below the clutch unit 4 in the direction in which the clutch unit 4 is arranged. 51, a guide wheel 52 that rotatably supports a rotating cylinder 52c via a bearing 52b to a bolt 52a fixed to the frame 2, and a lower surface 51b on which the belt 51 is disposed are wound around to move the belt 51. Drive wheels 53 for transmission. In the drive belt 5, the upper surface 51a on which the belt 51 is disposed is brought into pressure contact with the expansion / contraction portion 42 of the clutch portion 4 by the expansion of the diameter of the expansion / contraction portion 42 of the clutch portion 4.

The drive unit 6 is composed of an electric motor connected to the drive wheels 53 of the drive belt 5.

According to such an embodiment, the air compressor (not shown) is operated in a state where the drive belt 5 is moved and driven by the drive unit 6, so that the air from the air supply pipe 7 to the air of the rotary shaft 41 of the clutch unit 4 is moved. Air can be pressure-fed to the expansion / contraction part 42 via the passage 41a and the air hole 41b. The expansion / contraction part 42 of the clutch part 4 whose diameter is expanded by the pressure of the air is the roller 3 (roller tube 32) and the drive belt 5 Since the drive transmission system can be connected to the upper surface 51a of the belt 51 by being pressed against each other, it is possible to rotate the roller 3 (roller cylinder 32) and convey the conveyed object P. Further, by stopping the air compressor, it is possible to stop the pressure feeding of air from the air supply pipe 7 to the expansion / contraction part 42 via the air passage 41a of the rotating shaft 41 of the clutch part 4 and the air hole 41b. The expansion / contraction part 42 of the clutch part 4 whose diameter has been reduced by stopping the pressure feeding of air separates from the roller 3 (roller cylinder 32) and the drive belt 5 (upper surface 51a of the belt 51) to shut off the drive transmission system. Therefore, the rotation of the roller 3 (roller cylinder 32) can be stopped and the conveyance of the conveyed object P can be stopped.

That is, since the driving belt 5 on the driving side and the roller 3 on the driven side can be completely brought into contact with and separated from each other by the operation of the clutch portion 4, the drive transmission system is surely connected and disconnected. be able to. Further, since the expansion / contraction part 42 of the clutch part 4 expands / contracts around the rotary shaft 41, the expansion / contraction form becomes asymmetrical and the pressure contact is made by the roller 3 (roller cylinder 32) and the drive belt 5 (belt 51 mounting upper surface 51a). There is no such thing as a hangover. Further, by adjusting the air pressure supplied to the expansion / contraction portion 42 of the clutch portion 4, it is possible to change the coupling strength of the drive transmission system corresponding to the weight of the conveyed product P and the like. Since the support shaft 31 of the roller 3 can move up and down with respect to the frame 2, the roller 3 on which the article P is not loaded is slightly pushed up by the expansion / contraction part 42 of the clutch part 4 having an enlarged diameter. It is possible to prevent unnecessary load on the drive side. It is also possible to enlarge only the diameter of the expansion / contraction part 42 of the clutch part 4 located below the roller 3 on which the conveyed product P is placed so that unnecessary load is not applied to the drive side.

FIG. 5 shows a second embodiment of the roller conveyor according to the present invention.

In this embodiment, with respect to the expansion / contraction part 42 of the clutch part 4 of the first embodiment, the main body 42a is made of a rubber material and has a built-in cord formed of a thin thread such as a metal wire or a synthetic resin wire. Both ends of the main body 42a are fastened and fixed to the rotary shaft 41 by the bands 42b. That is, the work of attaching the expansion / contraction part 42 to the rotary shaft 41 can be easily performed.

According to such an embodiment, the material of the main body 42a of the expansion / contraction part 42 of the clutch part 4 has an advantage that the expansion / contraction response to air pressure is good and the durability is also good.

[0024] As described above, in addition to the illustrated embodiment, when the conveyance surface C of the conveyance object P is set at a relatively lower position from the floor surface F, the drive belt 5 or the like is provided above the shaft end of the roller 3. It is also possible to make it an embodiment to be provided.

Further, when the transport surface C of the transported object P is made large, it is possible to adopt an embodiment in which the clutch portion 4 and the drive belt 5 are provided on both sides of the roller 3.

[0026]

As described above, in the roller conveyor according to the present invention, in claim 1, the drive transmission system is reliably connected and disconnected by the expansion and contraction of the diameter of the clutch portion due to the air pressure, and the drive is performed by adjusting the air pressure. Since the coupling strength of the transmission system is variable, the start and stop of the drive unit can be reliably transmitted to the rollers. Further, due to this effect, it is possible to surely carry and stop the carried object, which brings about an effect of improving the carrying performance.

[0027] Further, in addition to the effect of claim 1, in claim 2, since the air supply system to the clutch part is simplified by incorporating the air passage into the clutch part, the structure of the entire device is simple. Has the effect of being converted. Also, due to the material of the expansion / contraction part of the clutch part, the responsiveness of the expansion / contraction of the diameter to the air pressure is improved, the reliability of transmission of start / stop of the drive part is further improved, and the durability of the expansion / contraction part of the clutch part is improved. There is an effect.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of a roller conveyor according to the present invention.

FIG. 2 is a side view of a main part of FIG.

3 is a reduced plan view of FIG. 1. FIG.

FIG. 4 is a side view of FIG.

FIG. 5 is a vertical cross-sectional view of an essential part showing a second embodiment of the roller conveyor according to the present invention.

[Explanation of symbols]

 3: Roller 4: Clutch part 41: Rotating shaft 42: Expansion / contraction part 5: Driving belt 6: Driving part C: Conveying surface P: Conveyed object

Claims (2)

[Scope of utility model registration request] 1. A roller is provided by a frictional force between a rotatable roller that is arranged in parallel in a feed direction of a conveyed object and forms a conveyance surface of the conveyed object, and a roller that is arranged along the direction in which the conveyed object is arranged and is moved by the roller side. In a roller conveyor including a rotating drive belt and a drive unit that drives the drive belt to move, a rotatable clutch that changes the diameter between the roller and the drive belt by air pressure and that comes in contact with and separates from the roller and the drive belt. A roller conveyer characterized by interposing a section. 2. The roller conveyor according to claim 1, wherein
A roller conveyor characterized in that the clutch portion is composed of a roller, a rotary shaft that is parallel to the drive belt and has an air passage therein, and an expansion / contraction part formed of a rubber material containing a cord and attached around the rotary shaft. .