JP3205521U - Abnormal stop release device and gravity conveyor - Google Patents

Abstract

The present invention provides an abnormal stop canceling device that does not have a large structure even when a conveyance path is long and has a simple configuration and can be reliably operated. A conveyance path C inclined forward and downward so that a terminal end E2 is lower than a starting end E1 is constituted by free rollers 2, 2,..., And loads W, W,. In the gravity conveyor G, an abnormal stop canceling device 1 that cancels an abnormal stop state in which a part of the load W is stopped on the free rollers 2, 2,. Are arranged in a predetermined range M. In the normal state A, the drive unit 3 is provided to move downward from the free rollers 2, 2,..., And in the abnormal stop state, the drive unit 3 contacts the free rollers 2, 2,. At the same time, the driving body 3 moves relative to the free rollers 2, 2,. The free rollers 2, 2,... Are rotated by frictional force to cancel the abnormal stop state. [Selection] Figure 1

Description

  The present invention relates to an abnormal stop canceling device for canceling an abnormal stop state in which a part of a load is stopped on a conveyance path of a gravity conveyor and returning it to a normal state.

In a distribution line, in a configuration in which a load such as a parts pallet is stored on a conveyance path of a gravity conveyor and delivered to the downstream side, a part of the load may stop unexpectedly on the conveyance path.
In such an abnormally stopped state, when an operator moves to the place of the load that is stopped in the middle of the conveyance path and moves the load, the work efficiency is lowered and the burden on the operator is increased. In addition, since the abnormal stop state cannot be quickly released, the operation rate of the gravity conveyor is lowered. Such a problem becomes conspicuous especially when the conveyance path is long.

  As an abnormal stop canceling device that cancels the abnormal stop state and returns to a normal state, an endless member that circulates in the longitudinal direction over the entire length of the transport path is arranged, and a pushing member that can hit the load on the transport path from the rear side A device provided on the endless body (for example, see Patent Document 1), a power wire stretched over the entire length of the conveyance path, and a forced feeding device attached to the power wire is driven by an air cylinder (for example, see Patent Document 2) Etc.

JP 2004-51276 A JP 2000-168925 A

In the configuration of the abnormal stop canceling device as in Patent Document 1, it is necessary to vertically circulate the pushing member over the entire length of the transport path, and therefore, particularly when the transport path is long, it may be large and require a large amount of power. is there.
Further, in the configuration of the abnormal stop canceling device as in Patent Document 2, since it is necessary to provide a number of forced feeding devices between the front and rear free rollers over most of the entire length of the conveying path, particularly when the conveying path is long, it is large. At the same time, the output of the air cylinder may be insufficient.

  Therefore, in view of the above-described situation, the present invention is intended to provide an abnormal stop canceling device that does not have a large-scale structure even when the conveyance path is long, and that can be reliably operated with a simple configuration. is there.

The inventor of the present application made and evaluated a prototype of a gravity conveyor in developing the abnormal stop canceling device used for the gravity conveyor.
As a result, it was found that the part where the part of the load stopped unexpectedly was not in the beginning and the vicinity of the conveyance path, and near the termination and termination, but in a certain range in the middle of the conveyance direction of the conveyance path.
Further, it was found that the range in the conveyance direction in which a part of the load stops depends on the configuration of the gravity conveyor and the specifications such as the size and weight of the load.
Based on the above knowledge, it is not necessary to provide a function to move the load over the entire length of the transport path, and it is possible to improve the reliability of the operation of the abnormal stop cancellation device by providing a function to move the load only within a predetermined range in the transport direction. And the idea of reducing manufacturing costs.
Furthermore, the present invention has been completed by intensively studying a configuration that reliably operates without using an actuator such as a motor or an air cylinder.

That is, in order to solve the above-described problem, the abnormal stop canceling device according to the present invention is configured by a free roller having a conveyance path that is inclined forward and downward so that the end is lower than the starting end, and the load on the free roller is automatically In the gravity conveyor to run,
An abnormal stop release device that releases an abnormal stop state in which a part of the load is stopped on the free roller and returns to a normal state,
It is arranged in a predetermined range in the transport direction of the transport path, and in the normal state, includes a drive body that moves downward from the free roller,
In the abnormally stopped state, the drive body abuts on the free roller, and the drive body relatively moves backward or forward in the transport direction with respect to the free roller (Claim 1).

According to such a configuration, the driving body is arranged below the free roller in a predetermined range in the conveyance direction of the conveyance path, which is determined according to the configuration of the gravity conveyor and specifications such as the size and weight of the load. In an abnormally stopped state where a part of the load is stopped on the free roller, the free roller is rotated by frictional force by causing the drive body to contact the free roller and relatively moving backward or forward in the transport direction. The abnormal stop state can be quickly released.
In addition, since the driving body is arranged only in a predetermined range in the transport direction of the transport path, even if the transport path is long, a large structure is not obtained.
Furthermore, since the driving body is below the free roller in the normal state, it does not become a load of rotation of the free roller in the normal state, and does not affect the operation of the gravity conveyor in the normal state at all.

Here, the driving body is constituted by a winding transmission mechanism including a pair of front and rear rotating bodies separated in the conveying direction, and an endless stretch member spanned between the rotating bodies,
The front and rear rotating bodies are eccentric rotating bodies in which the distance to the outer peripheral surface around the rotation axis varies in the circumferential direction,
It is preferable that the state in which the driving body is separated from the free roller and the state in which the driving body is in contact with the free roller are switched depending on the rotation angle of the eccentric rotating body (Claim 2).
According to such a configuration, the state in which the drive body is separated from the free roller and the state in contact with the free roller can be switched depending on the rotation angle of the eccentric rotator, and the endless shape spans the pair of front and rear rotators. Since the abnormal stop state can be canceled by the tension member contacting the free roller and moving rearward or forward, the drive body of the abnormal stop canceling device can be configured by a simple and highly reliable mechanical element.

Further, it is more preferable that a plurality of the winding transmission mechanisms operate in synchronization by arranging a plurality of the winding transmission mechanisms back and forth along the conveying direction and connecting them by an endless stretching member ( Claim 3).
According to such a configuration, a plurality of winding transmission mechanisms composed of front and rear eccentric rotating bodies and endless stretching members are arranged in the front and rear, and these are connected to form a driving body, so that the conveyance path is long In this case, the driving body can be easily arranged in a predetermined range in the transport direction of the transport path.

Further, it is more preferable that the rotating body is a pulley and the endless stretch member is a belt.
According to such a configuration, since the power is transmitted by the pulley and the belt, the reliability of the operation of rotating the free roller by the frictional force is high. In particular, by using the timing pulley and the timing belt of both teeth, the pulley and the belt operate reliably in synchronism, and the operation of rotating the free roller by the irregularities on the outer peripheral surface of the timing belt of both teeth becomes more reliable. .

Furthermore, it is even more preferable that an operation unit capable of operating the drive body in the abnormally stopped state is provided at the terminal end or the start end of the conveyance path.
According to such a configuration, the drive body can be operated by the operation unit provided at the end or the start end of the conveyance path, so that the abnormal stop state can be released more quickly.

In addition, an operation unit operable to rotate the eccentric rotator in the abnormally stopped state is provided at the terminal end or the start end of the conveyance path,
One end of the flexible pulling member is connected to the operation unit, and the other end of the flexible pulling member is connected to a frame body installed in the transfer direction of the transfer path via an elastic body, and the flexible The intermediate portion of the traction member is stretched over a drive rotator coaxial with the eccentric rotator, and the drive rotator and the rotation shaft of the eccentric rotator are connected via a one-way clutch,
It is even more preferable that the eccentric rotating body rotates through the flexible pulling member and the drive rotating body by a pulling operation of the operation portion.

According to such a configuration, the drive unit can be operated by rotating the eccentric rotator by the operation unit provided at the terminal end or the start end of the transport path, so that the abnormal stop state can be released more quickly.
In addition, when the operating portion is pulled, the eccentric rotating body rotates via the flexible pulling member and the driving rotating body, so that the driving body can be operated by manual operation from the terminal end or the starting end of the conveyance path. When the hand is released from the operation part, the operation part, the flexible traction member, and the drive rotator are restored to their original positions by the restoring force of the elastic body that has been elastically deformed. Since it is not transmitted to the eccentric rotating body, the driving body does not operate so as to rotate the free roller in the reverse direction.
Therefore, it is possible to repeatedly perform the pulling operation of the operation unit, and thereby, the free roller can be continuously rotated in a desired rotation direction, and the abnormal stop state can be reliably released.
Furthermore, since an actuator such as a motor is not used, the manufacturing cost can be reduced, and attachment to an existing gravity conveyor is easy.

  The gravity conveyor according to the present invention is a gravity conveyor configured by a free roller with a conveying path inclined forward and downward so that the end is lower than the starting end, and the load on the free roller is self-propelled, and the abnormal stop A release device is provided (claim 7).

  As described above, according to the abnormal stop canceling device according to the present invention, even when the conveyance path is long, the structure is not large, and the operation is reliable with a simple configuration, and a part on the free roller. It is possible to quickly release the abnormal stop state in which the load of the vehicle stops.

It is a front view of the gravity conveyor provided with the abnormal stop cancellation | release apparatus which concerns on embodiment of this invention. Similarly it is the figure seen from back. It is a schematic explanatory drawing which shows the surroundings of the drive body of the abnormal stop cancellation | release apparatus in a normal state, (a) is a top view, (b) is a front view. It is operation | movement explanatory drawing of the drive body of the abnormal stop cancellation | release apparatus in an abnormal stop state, (a) is a front view which shows the state which the drive body contact | abutted to the free roller, (b) is a drive body back with respect to a free roller It is a front view which shows the state which moved relatively. (A) is a principal part enlarged front view which shows the state which the drive body contact | abutted to the free roller, (b) is a principal part enlarged front view which shows the state which the drive body moved relatively back with respect to the free roller. It is the longitudinal cross-sectional view seen from the back which shows the structure around the drive rotary body over which the flexible pulling member was spanned, and the eccentric rotary body.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and all the embodiments satisfying the requirements described in the claims of the utility model registration. Is included.
In this specification, it is assumed that the conveyance direction of the load is the front, the opposite side is the rear, the left and right are frontward, and the view seen from the left is the front view.

  As shown in the front view of FIG. 1 and the rear view of FIG. 2, the gravity conveyor G provided with the abnormal stop canceling device 1 according to the embodiment of the present invention has a lower end E2 than the start E1. Is configured with free rollers 2, 2,..., And the loads W, W,... On the free rollers 2, 2,. The length is, for example, about 5 to 10 m. The inclination angle of the conveyance path C is appropriately adjusted according to the weight, size, etc. of the load W.

The abnormal stop canceling device 1 cancels the abnormal stop state in which a part of the load W is stopped on the free rollers 2, 2,... And returns it to the normal state, and a predetermined range M in the transport direction of the transport path C. Placed in.
The driving body 3 of the abnormal stop canceling device 1 is separated downward from the free rollers 2, 2,... In the normal state A as shown in FIGS.
By pulling the operating portion 8 provided at the end E2 of the conveyance path C in the abnormally stopped state, the driver 3 is operated via a belt 9 that is a flexible pulling member as will be described later. Thereby, the driving body 3 abuts on the free rollers 2, 2,... And moves relative to the free rollers 2, 2,.

As shown in the front view of FIG. 1, the plan view of FIG. 3A, and the front view of FIG. 3B, the driving body 3 is an eccentric pulley 4 that is a pair of front and rear eccentric rotating bodies separated in the transport direction. , 5, and an endless belt 6 which is an endless stretch member spanned between the eccentric pulleys 4 and 5, and is constituted by winding transmission mechanisms D1, D2, D3 arranged back and forth along the transport direction. . Since the winding transmission mechanisms D1, D2, and D3 are connected by endless belts 7 and 7 that are endless stretching members, they operate in synchronization.
In addition, the number of such winding transmission mechanisms may be one, two, or four or more. The longitudinal direction of the predetermined range M set in accordance with the range of the conveyance direction in which some of the loads W, W,... Abnormally stop, which are determined by the configuration of the gravity conveyor G and specifications such as the size and weight of the load W. Depending on the length, the number of winding transmission mechanisms is appropriately selected.
As described above, when a plurality of winding transmission mechanisms constituted by the front and rear eccentric pulleys 4 and 5 and the endless belt 6 are arranged in the front and rear, and these are connected to form the driving body 3, the conveyance path C is long. The drive body 3 can be easily arranged in the predetermined range M in the transport direction of the transport path C.

The distance to the outer peripheral surface of the eccentric pulleys 4 and 5 around the rotation shafts 4A and 5A varies in the circumferential direction, and the endless belts 6 and 7 are thicker than the flanges of the eccentric pulleys 4 and 5. The eccentric pulleys 4 and 5 are arranged so that the endless belts 6 and 7 come into contact with the free rollers 2, 2,.
Accordingly, the endless belts 6 and 7 of the driving body 3 are in contact with the free rollers 2, 2,... At the rotational angle positions in the front view of FIG. .

From this state, the eccentric pulleys 4 and 5 are rotated as indicated by arrows in FIG. 5B, whereby the endless belts 6 and 7 are rotated by the eccentric pulleys 4 and 5 further rotated as shown in the front view of FIG. The upper part of the is moved backward.
Therefore, the free rollers 2, 2,... That contact the upper portions of the endless belts 6, 7 that move rearward rotate as indicated by the arrows in FIG. As shown by the arrow, the abnormally stopped load W can be moved in the transport direction.

By further rotating the eccentric pulleys 4 and 5 from this state, as shown in the front view of FIG. 3B and the enlarged front view of the main part of FIG. 3 are separated.
As described above, the state in which the driving body 3 is separated from the free rollers 2, 2,... By the rotation angle of the eccentric pulleys 4 and 5, which are eccentric rotating bodies, and the driving body 3 contacts the free rollers 2, 2,. You can switch between
According to such a configuration, the drive body 3 is switched between the state where the drive body 3 is separated from the free rollers 2, 2,... And the state where the drive body 3 is in contact with the free rollers 2, 2,. Since the endless belts 6, 7 spanned between the pair of front and rear eccentric pulleys 4, 5 abut against the free rollers 2, 2,. Thus, the driving body 3 of the abnormal stop canceling device 1 can be configured by highly reliable mechanical elements.

Here, in the present embodiment, power is transmitted by the eccentric pulleys 4 and 5 that are eccentric rotating bodies and the endless belts 6 and 7 that are endless stretch members, so that the free rollers 2, 2, 2 are caused by frictional force. The reliability of the operation of rotating ... is high.
Also, as shown in FIGS. 3 to 5, the endless belts 6 and 7 that are endless stretching members are timing belts of both teeth, and the eccentric pulleys 4 and 5 that are eccentric rotating bodies are timing pulleys. The pulleys 4 and 5 and the belts 6 and 7 operate reliably and synchronously, and the operation of rotating the free rollers 2, 2,. .
However, the endless stretch member and the eccentric rotator are not limited to such a configuration, and the endless stretch member may be a flat belt, a chain, or the like. Therefore, the eccentric rotator is a sprocket. Also good.

As shown in the front view of FIG. 1, the rear view of FIG. 2, and the longitudinal sectional view of FIG. 6, the one end 9 </ b> A of the belt 9, which is a flexible traction member, is connected to the operation unit 8. The other end portion 9B of the belt 9 is connected to a frame body F1 installed in the transport direction of the transport path C via a tension coil spring K that is an elastic body.
Then, the direction of the belt 9 is changed by the front and rear direction changing pulleys 11 and 12 supported by the structural members such as the frame bodies F1 and F2, and the intermediate portion 9C of the belt 9 is driven by a drive rotating body coaxial with the eccentric pulley 4. It runs over a certain drive pulley 10.
The drive pulley 10 and the rotating shaft 4A of the eccentric pulley 4 are connected via a one-way clutch H.

In the abnormal stop state B shown in FIG. 4 (a) in which a part of the load W stops unexpectedly on the free rollers 2, 2,... From the normal state A shown in FIG. The operation unit 8 is pulled as shown by a two-dot chain line in FIG.
Thereby, since the eccentric pulley 4 rotates via the belt 9 and the drive pulley 10, the drive body 3 can be operated by manual operation from the end E2 of the conveyance path C.
Therefore, by pulling the operating portion 8 provided at the end E2 of the transport path C, the eccentric pulley 4 is rotated to operate the driving body 3 so that the load W abnormally stopped as described above can be moved in the transport direction. Therefore, the abnormal stop state B can be quickly released.

When the operation unit 8 is released, the operation unit 8, the belt 9 and the drive pulley 10 are returned to their original positions by the restoring force of the elastically deformed tension coil spring K, and the rotation of the drive pulley 10 at that time is a one-way clutch. Since it is not transmitted to the eccentric pulley 4 due to H, the drive body 3 does not operate so as to rotate the free rollers 2, 2,.
Therefore, the pulling operation of the operation unit 8 can be repeatedly performed, and thereby the free rollers 2, 2,... Are continuously rotated in a desired rotation direction to reliably release the abnormal stop state B. Can do.
Furthermore, since an actuator such as a motor is not used, the manufacturing cost can be reduced, and attachment to an existing gravity conveyor is easy.

According to the configuration of the abnormal stop canceling apparatus 1 as described above, the free roller is set in the predetermined range M in the transport direction of the transport path C, which is determined according to the configuration of the gravity conveyor G and specifications such as the size and weight of the load. In the abnormal stop state B in which a part of the load W is stopped on the free rollers 2, 2,..., The driving body 3 is placed below the free rollers 2, 2,. Are brought into contact with each other and moved rearward in the conveying direction, whereby the free rollers 2, 2,...
Further, since the driving body 3 is disposed only in the predetermined range M in the transport direction of the transport path C, even if the transport path C is long, a large structure is not obtained.
Further, since the driving body 3 is below the free rollers 2, 2,... In the normal state A, the driving body 3 does not become a rotation load of the free rollers 2, 2,. The operation of the conveyor G is not affected at all.

In the above description, the operation unit 8 is provided at the end E2 of the conveyance path C. However, the operation unit 8 may be provided at the start end E1 of the conveyance path C.
Further, in the above description, in the abnormal stop state, the driving body 3 is brought into contact with the free rollers 2, 2,... And moved relative to the free rollers 2, 2,. However, the abnormal stop state may be canceled by moving the driving body 3 relative to the free rollers 2, 2,.
Further, in the above description, the driving body 3 has no actuator such as a motor, and the configuration example in which the driving body 3 is driven by manual operation of the operation unit 8 has been described. However, the driving body 3 is an actuator such as a rotary motor. You may comprise so that it may drive. In this case, an operation unit that is a so-called “remote control” that is wired or wireless that operates the actuator may be disposed on the end E2 side or the start end E1 side of the transport path C.

1 Abnormal stop release device 2 Free roller 3 Drive body 4, 5 Eccentric pulley (Eccentric rotating body)
4A, 5A Rotating shaft 6, 7 Endless belt (endless stretch member)
8 Operation part 9 Belt (flexible traction member)
9A One end portion 9B The other end portion 9C Intermediate portion 10 Drive pulley (drive rotary body)
11, 12 Direction change pulley A Normal state B Abnormal stop state C Conveyance path D1, D2, D3 Wound transmission mechanism E1 Start end E2 End F1, F2 Frame body G Gravity conveyor H One-way clutch K Tension coil spring (elastic body)
M Predetermined range W in the conveyance direction

Claims (7)

In the gravity conveyor that comprises a free roller and a conveyance path that is tilted forward so that the end is lower than the start end, and that self-propels the load on the free roller,
An abnormal stop release device that releases an abnormal stop state in which a part of the load is stopped on the free roller and returns to a normal state,
It is arranged in a predetermined range in the transport direction of the transport path, and in the normal state, includes a drive body that moves downward from the free roller,
In the abnormal stop state, the drive body abuts on the free roller, and the drive body relatively moves backward or forward in the transport direction with respect to the free roller. The driving body is composed of a pair of front and rear rotating bodies spaced apart in the conveying direction, and a winding transmission mechanism including an endless stretch member spanned between the rotating bodies,
The front and rear rotating bodies are eccentric rotating bodies in which the distance to the outer peripheral surface around the rotation axis varies in the circumferential direction,
The abnormal stop canceling device according to claim 1, wherein a state in which the driving body is separated from the free roller and a state in which the driving body is in contact with the free roller are switched depending on a rotation angle of the eccentric rotating body.   The abnormal stop according to claim 2, wherein a plurality of the winding transmission mechanisms are operated in synchronization by arranging a plurality of the winding transmission mechanisms back and forth along the conveying direction and connecting them with an endless stretch member. Release device.   The abnormal stop canceling device according to claim 2 or 3, wherein the rotating body is a pulley and the endless stretching member is a belt.   The abnormal stop canceling device according to claim 1, wherein an operation unit capable of operating the driving body in the abnormal stop state is provided at a terminal end or a start end of the conveyance path. An operation unit operable to rotate the eccentric rotator in the abnormally stopped state is provided at the terminal end or the start end of the conveyance path,
One end of the flexible pulling member is connected to the operation unit, and the other end of the flexible pulling member is connected to a frame body installed in the transfer direction of the transfer path via an elastic body, and the flexible The intermediate portion of the traction member is stretched over a drive rotator coaxial with the eccentric rotator, and the drive rotator and the rotation shaft of the eccentric rotator are connected via a one-way clutch,
The abnormal stop canceling device according to any one of claims 2 to 4, wherein the eccentric rotating body rotates through the flexible pulling member and the drive rotating body by a pulling operation of the operation unit. A gravity conveyor is configured with a free roller and a conveyance path inclined downward so that the end is lower than the start end, and the load on the free roller is self-propelled,
The gravity conveyor provided with the abnormal stop cancellation | release apparatus of any one of Claims 1-6.

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