JP5025920B2 - Belt conveyor - Google Patents

Description

  The present invention relates to a belt conveyor, and more particularly to a drive mechanism that rotates an endless belt.

  The drive system of the endless belt in the straight conveyor belt conveyor is such that the endless belt is wound around tail rollers attached to both sides of the frame, and a part of the endless belt is wound around the outer peripheral surface of the drive pulley. The belt is rotated in the circumferential direction by a frictional force with the outer peripheral surface of the belt. And it is classified into a head drive type, a center drive type, etc. by the position where a drive pulley is arrange | positioned (for example, refer patent document 1).

By the way, rotation of the endless belt in the belt conveyor described above is performed by frictional force with the outer peripheral surface of the drive pulley. Therefore, in order to increase the frictional force, the belt contact range (winding range) with respect to the outer peripheral surface of the drive pulley. In order to further increase the contact pressure and further increase the contact pressure, the endless belt is squeezed with a snap roller, and a predetermined tension is applied to the belt. That is, in the conventional belt conveyor, belt tension is indispensable.
However, when oil, water, powder, etc. adhere to the endless belt and it adheres to the drive pulley, the contact frictional force with the endless belt decreases, thereby reducing the rotational transmission force to the endless belt. There is a problem that the rotational travel of the endless belt becomes unstable.

JP 2000-255737 A

The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a belt conveyor that realizes stable belt travel without applying unnecessary tension to the endless belt. There is.
Another object of the present invention is to provide a belt conveyor capable of ensuring stable rotation even when oil, water, powder or the like adheres to an endless belt.
Furthermore, another object of the present invention is to provide a belt conveyor in which a frame around which an endless belt is wound can be separated from a drive unit and disengaged upward so that the endless belt can be easily replaced.

In order to achieve the above object, the belt conveyor of the present invention has an endless belt wound around tail rollers disposed on both sides of a linear frame, and a return path side of the endless belt is disposed inside the belt. And holding the endless belt by the endless rotation of the drive rotating body corresponding to the rotating member and rotating the endless belt by the endless rotation of the driving rotating body. It shall be the feature.
As a form of the above-mentioned clamping, a form using a magnet attracting action, a form using a crimping action by a spring, and the like are raised.
Examples of the form of the rotating member include an endlessly rotating chain, a rotating belt such as a timing belt, a steel belt, and a round belt, or a roller unit in which a large number of small rollers are arranged in parallel. These rotating members may be either a free rotating type or a driving type.
Further, the arrangement position of the clamping means comprising a rotating member and the driving rotation member may be within the range of the width direction of the endless belt, the position and the number to the arrangement in accordance with the belt width of the endless belt Determine as appropriate. For example, both sides in the belt width direction, or approximately one center in the belt width are arbitrary.

  According to the above means, the return path side of the endless belt is sandwiched between the rotating member and the driving rotating body, and the sandwiched position moves from the starting end side of the driving rotating body that rotates endlessly to the terminal end side, thereby the endless belt. Is moved in the direction of the captain. This operation is continuously performed by the drive rotating body that rotates endlessly, whereby the linear endless belt is driven to rotate. And since a drive rotary body is arrange | positioned under the return path side (outside) of an endless belt, it can be set as the conveyor which can isolate | separate a flame | frame upward with respect to a drive rotary body (drive part).

The specific configuration of the clamping form using the magnet's attracting action consists of an endless rotation of the drive rotating body, and a rotation band that rotates endlessly and a magnet fixed to the outer surface of the rotation band at a predetermined interval. across the belt clamp the belt by the suction action of a rotating member made of a metal material that adsorbs to the corresponding magnet or magnets, you configured to transfer.
When the magnets are attracted to each other, either the N pole or the S pole is fixed to the rotation band of the driving rotating body, and the opposite pole that generates an attracting action with the magnet of the driving rotating body on the rotation band of the corresponding rotating member. Secure the magnet.
As the rotation bands of the driving rotator, expansion and contraction is substantially no elastic deformation less members, for example, using a chain, to which is constructed by attaching a magnet via a mounting piece (Claim 2). The shape of the magnet attached to the rotating belt via the attachment piece is not limited to a flat plate with a flat surface, but may be a circular shape, and any shape may be used as long as the clamping state by the magnet attracting action is established.
In addition to the chain, a timing belt, a steel belt, or the like can be used for the rotation band. Further, the outer circumference of the rotation band itself may be magnetized.

  According to the above means, the endless belt is clamped by the magnet of the driving rotating body that rotates endlessly and the magnetizing action of the rotating member, or the magnetizing action of the magnet and the metal plate, and the magnet that clamps the endless belt. The magnets and the metal plate are moved from the start end side to the end side of the drive rotator by endless rotation of the drive rotator. Thus, the movement with the endless belt sandwiched is continuously performed by the endless rotation of the drive rotating body.

One or a plurality of belt clamping means by the rotating member and the driving rotating body that rotates endlessly can be arranged within the range in the width direction of the endless belt. in the arrangement to Turkey, it is possible to establish a stable running balanced.

Further, at least one of the rotary member and the drive rotary member, but it may also be configured to be switchable and away with respect to the other.
According to the above means, the clamping state of the endless belt is released by separating one of the rotating member or the driving rotating body from the other. Thereby, the endless belt can be easily removed. In addition, it is more advantageous in terms of operation and structure that the holding means arranged outside the belt is movable.

The belt conveyor according to the present invention has the configuration according to claims 1 and 2 to sandwich the belt by the attracting action between magnets or the attracting action between magnets and a metal plate in contrast to the conventional method of rotating by transmission of frictional force. Therefore, the belt tension to obtain the frictional force as before is unnecessary, so the belt is not easily damaged, and a stable clamping state can be established, and a stable belt running over a long period of time. Possible belt conveyors can be provided.
In addition, since the drive rotator (drive unit) is disposed on the lower side (outside) of the return path side of the endless belt, when the connection between the drive rotator (drive unit) and the frame is separable, The frame can be separated upward from the driving rotating body (driving unit). Thereby, a belt conveyor capable of easily exchanging the endless belt can be provided.
In addition, since the endless belt can be released, the endless belt can be pulled out in the belt width direction if the leg or frame supporting the frame is a cantilever structure even when the drive rotating body and the frame are not separated. Can be easily removed.

Furthermore, according to the configuration of the third aspect of the invention, it is possible to establish a stable belt running without causing meandering or the like.

Hereinafter, an example of implementation of the belt conveyor according to the present invention will be briefly described with reference to the drawings.
FIG. 1 shows a belt conveyor A equipped with a driving system according to the present invention, in which a horizontally long frame 1 is horizontally supported by leg members 2 and tail rollers 3 and 3 ′ are rotated on both sides of the frame 1 in the machine length direction. The endless belt 4 is wound around the tail rollers 3 and 3 ′, and the rotating members 5 and 5 ′ are provided on the inner side of the return path side 4 b of the endless belt 4. , 5 ′, endlessly rotating drive rotors 6, 6 ′ are arranged outside endless belt 4, and the return side belt is sandwiched between the endless belts 4. The belt 4 is rotated so that the article to be conveyed W placed on the forward path side 4a is conveyed.

As shown in FIG. 3, the frame 1 is a well-known today in which side plates 1b and 1c are integrally connected to the front and rear edges of a top plate (trough) 1a that is slightly wider than the belt width of the endless belt 4 so as to be integrated downward at a right angle. In the frame, tail rollers 3 and 3 ′ are rotatably supported on both sides in the longitudinal direction of the frame 1 via tail brackets 7 and 7 ′.
Further, leg members 2 are connected and fixed to the lower surfaces of the front and rear side plates 1b and 1c in the frame 1 with bolts and nuts at predetermined intervals in the machine length direction. As shown in the drawing, the frame 1 is made of an aluminum material in which dovetails (groove structure in which the opening width of the inlet is narrower than the back groove width) 8 are formed on the front, rear, and lower surfaces of the front and rear side plates 1b and 1c. In the case of an object, the leg member 2 can be fixed at a predetermined position using the dovetail groove 8.

  Rotating members 5 and 5 ′ disposed between the forward path side 4 a and the return path side 4 b of the endless belt 4 can rotate freely with a small-diameter roller 5 a magnetized with one pole of a magnet approaching the outer periphery thereof. The arranged roller groups are arranged in two rows in the front-rear direction (belt width direction). The two rows of roller groups are arranged so as to be shifted by the radius of the roller 5a so that the axis of the roller 5a in one row is positioned between the axes of the rollers 5a in the other row. Due to this roller arrangement, there are many adsorbing locations with the corresponding drive rotator 6 across the return side belt 4b of the endless belt 4, and the interval between the adsorbing locations is reduced, so that stable belt clamping is performed. It is configured.

  The rotating members 5 and 5 ′ having the above-described configuration are arranged on both side edges of the endless belt 4 in the belt width direction using support plates 9 that are positioned below the top plate 1 a of the frame 1 and are laid between the side plates 1 b and 1 c. The suspension is supported so as to contact a slightly inner position. The support plate 9 is fixed to the side plates 1b and 1c by bolts and nuts using dovetail grooves 8 formed on the side plates 1b and 1c. Accordingly, the rotating members 5 and 5 ′ can move to a desired position along the dovetail groove 8 formed in the machine length direction of the frame 1 and can be fixed.

The drive rotator 6, 6 'holding the return path 4b of the endless belt 4 with the rotating members 5, 5' includes a chain (rotating band) 6a that rotates endlessly, and a magnet 6b on the outer surface of the chain 6a. Are fixed at predetermined intervals.
As shown in FIG. 3B, the magnet 6b is fixed to the chain 6a so as not to inhibit endless rotation of the chain 6a. The specific mounting structure will be described later.

The drive rotators 6 and 6 ′ are attached to auxiliary mounting plates 12 and 12 ′ that can be turned up and down and disposed inside the mounting plates 11 and 11 ′ that are vertically fixed to the outer surfaces of the side plates 1b and 1c of the frame 1. It has been.
Specifically, the auxiliary mounting plates 12 and 12 ′ are wound around sprockets 13a, 13b, 13a ′, and 13b ′ that are rotatably supported at predetermined intervals in the machine direction. The shaft 14a fixed over one of the sprockets 13a and 13a ′ is projected outward from the mounting plate 11 via bearings 15 and 15 ′ attached to the auxiliary mounting plates 12 and 12 ′, and is driven by the protruding portion. A mechanism 16 is connected.
The shaft 14b to which the other sprocket 13b is attached is fitted in a long hole 17 formed in the auxiliary mounting plate 12 so that the distance between the shaft 14a and the shaft 14a can be adjusted. Thus, the shaft 14b is moved and adjusted along the long hole 17, so that the distance between the sprocket 13a and the sprocket 13b can be varied, and the tension of the chain 8 can be adjusted. In addition, after moving and adjusting the shaft 14b of the sprocket 13b along the long hole 17, it is fixed to the adjusted state by tightening a nut or the like.

  As shown in FIGS. 2 and 4, the auxiliary mounting plates 12, 12 ′ to which the drive rotators 6, 6 ′ are attached have the side plate lower portion on the side of the sprocket 13 a to which the drive mechanism 16 is mounted. , 11 ′ is pivotally supported by a shaft 18 so as to be pivotable up and down, and a stopper pin 19 is fixed to a side end on the sprocket 13b side, and the stopper pin 19 is provided on the mounting plates 11, 11 ′. The arc grooves 20, 20 ′ for restricting the range are fitted. Further, the mounting plate 11 is provided with an elliptical window hole 21 through which a shaft 14a horizontally mounted on the auxiliary mounting plates 12 and 12 'rotating up and down.

  With the above configuration, when the auxiliary mounting plates 12 and 12 ′ are supported in a horizontal state, as shown in FIG. 4A, the drive rotors 6 and 6 ′ maintain the horizontal state, and the rotating members 5 and 5 ′. And the drive rotators 6 and 6 ′ sandwich the both ends of the endless belt 4 in the width direction of the return-side belt 4b by the attracting action of the magnets, and the endless rotation of the drive rotators 6 and 6 ′ rotates the rotating members 5 and 5 ′. The roller 5a is also rotated to move the magnetic field, and the endless belt 4 is rotated. Then, when the auxiliary mounting plates 12 and 12 ′ are rotated downward with the shaft 18 as a fulcrum, as shown in FIG. 4B, the drive rotators 6 and 6 ′ are moved to the rotating members 5 and 5 ′ and the return belt 4b. On the other hand, it moves in the separating direction, and the previous clamping state is released. Thereby, the endless belt 4 can be easily attached and detached.

  The drive mechanism 16 drives and rotates the drive rotators 6 and 6 '. As shown in FIGS. 2 and 3, the shaft fixed to the sprockets 13a and 13a' of the drive rotators 6 and 6 '. The drive sprocket 16a is fixed to the side end of 14a, and the chain 16d is wound around the drive sprocket 16a and the sprocket 16c fixed to the output shaft of the motor 16b fixed to the mounting plate 12. It is transmitted to the drive sprocket 16a through 16d, and the drive rotators 6, 6 'are driven to rotate.

Next, the fixing structure of the magnet 6b to the chain (rotating band) 6a in the drive rotators 6, 6 ′ described above will be described with reference to FIGS.
In FIG. 3B, the magnet mounting piece 22 is integrally formed on the outer peripheral edge of the link plate 10 constituting the chain 6a at the substantially central position in the length direction so as to protrude outward in the right-angled horizontal direction. The base plate 23 is fixed with screws over the magnet mounting pieces 22 of the left and right link plates 10, and the magnet 6 b is fixed with screws at the center of the upper surface (outer surface) of the base plate 23. The magnet 6b is countersunk and fixed with screws so that the outer surface of the magnet 6b is flush with the belt. Further, the fixing of the magnet 6b to the base plate 23 is not limited to screwing, and may be fixed by an adhesive material, and all conventional mounting methods are applied. However, the screwing has the advantage that it can be easily replaced when the magnet is damaged.
And the width | variety (direction orthogonal to the direction which rotates endlessly) of the magnet 6b fixed to the baseplate 23 is taken as the width | variety which covers the two rows of rollers 5a which comprise the rotating members 5 and 5 '.

  As the magnet 6b fixed to the chain 6a with the above-described structure, neodymium, ferrite, or the like is used. In the usage situation of the belt conveyor, it may be necessary to wash with water after use. In the case of the conveyor to be washed with water, as the above-mentioned magnet material, a magnet material that does not rust even when immersed in water, for example, made of ferrite It is beneficial to use a magnet.

In the illustrated embodiment described above, since the interval between the forward path side and the backward path side of the endless belt 4 that is endlessly rotated is narrow, one of the clamping members disposed inside the endless belt 4 is a roller type. When the distance between the forward path side and the backward path side can be secured widely, the same configuration as the other of the clamping members, that is, the endlessly rotating rotary body may be replaced with the illustrated roller type.
In this case, the form of the rotating body that rotates endlessly is the same as that of the driving rotating bodies 6 and 6 ′, in which a magnet is attached to the outer surface of the chain (rotating belt), or in which the magnet is attached to the outer surface of the timing belt. A round belt, a flat belt, or the like that is kneaded with any of these may be used. The rotating body may be either a driving type or a free rotating type, like the lower driving rotating bodies 6 and 6 '.

In the belt clamping structure in the above-described embodiment, a magnet is attached to the rotating member arranged on the inner side (upper side) of the belt and the driving rotating body arranged on the outer side (lower side) of the belt, and the magnet is clamped by the attracting action of the magnet. However, the belt may be sandwiched between elastic bodies.
For example, in the form of FIG. 3B, a pressure plate urged outward by a spring is provided on the upper surface of the base plate 23 instead of the magnet 6b, and the belt is sandwiched between the pressure plates.

  Further, when the illustrated embodiment and the illustrated rotating member are changed to a rotating body that rotates endlessly, the belt is held by the magnet's attracting action, and the operation of the driving rotating body that rotates endlessly is held. The endless belt is rotated by moving in the machine direction. Therefore, if a magnet is embedded in a range corresponding to the drive rotor in the belt width direction of the endless belt and the magnet portion is magnetized to the magnet of the drive rotor and a magnetic pole that generates an attracting action, the endless rotation of the drive rotor is achieved. The endless belt is rotated following the movement. In such a configuration, one of the clamping members can be omitted, the drive mechanism can be further simplified, and the drive unit and the frame can be separated by adopting a detachable separation structure for supporting the frame with respect to the leg member. Thus, a belt conveyor capable of easily exchanging belts can be configured.

The front view which shows an example of implementation of the belt conveyor which concerns on this invention. (A) is a cutaway plan view of the same part, (b) is an enlarged plan view of the main part. (A) is an expanded sectional view which follows the (3)-(3) line | wire of FIG. 1, (b) is an enlarged view of the principal part. (A) is sectional drawing which follows the (4)-(4) line | wire of FIG. 3, (b) is the same sectional drawing which spaced apart the drive rotary body from the belt.

Explanation of symbols

A ... Belt conveyor 1 ... Frame 3, 3 '... Tail roller 4 ... Endless belt 5, 5' ... Rotating member 6, 6 '... Drive rotating body 6a ... Chain (rotating belt) 6b ... Magnet

Claims (3)

An endless belt is wound around tail rollers arranged on both sides of the linear frame, and the return side of the endless belt is arranged on the inner side of the belt, and the outer side of the belt corresponding to the rotating member. A belt conveyor that is pinched by a drive rotating body that is endlessly rotated, and that rotates an endless belt by movement of a pinching portion by endless rotation of the drive rotating body ,
The drive rotator is constituted by a rotation band that rotates endlessly, and a magnet fixed to the outer surface of the rotation band at a predetermined interval. Further, the drive rotator is formed on the outer surface of the linear frame. Attached to an auxiliary mounting plate attached to a fixed mounting plate so as to be pivotable up and down around the support shaft, it can be switched to and away from the corresponding rotating member, and a corresponding magnet or magnet is sandwiched between endless belts. A belt conveyor characterized in that a belt is sandwiched and transferred by an adsorption action with a rotating member made of a metal material adsorbed on the belt. 2. The belt conveyor according to claim 1, wherein a rotation band of the drive rotator is a chain, and magnets are attached to the left and right independent chains via attachment pieces, respectively . The belt conveyor according to claim 1 or 2, wherein the belt holding means by the rotating member and the driving rotating body rotating endlessly are arranged on both sides in the width direction of the endless belt .

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