JP2007290805A - Non-powered lowering conveyance device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-powered lowering conveyance device capable of stabilizing a conveying posture of a load receiving base in lowering and conveying a conveyance article even when it is a heavy article and reducing a burden on a traction member. <P>SOLUTION: This non-powered lowering conveyance device is furnished with rotors 2a, 2b respectively arranged on upper and lower parts of a device body 1 free to rotate, the traction member 3 wound around between these rotors free to travel and the load receiving base 4 horizontally supported on this traction member 3 and on which the conveyance article W is placed and carries the conveyance article W placed on the load receiving base 4 to a discharging position below by travelling the traction member 3, the load receiving base 4 is supported on the traction member 3 at a center of a side part free to revolve, and the device body 1 is furnished with a guide member 13 arranged in the vertical direction along the traction member 3 and to guide by holding a loading posture of the load receiving base 4 at least between the supplying position and the discharging position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a non-powered descent conveying apparatus capable of conveying an object to be conveyed from an upper position to a lower position without power.

For example, when transporting an object to be transported from a belt conveyor positioned at a predetermined height to a belt conveyor positioned one step lower than this, it is necessary to provide a descending transport device between the upper and lower belt conveyors.
Conventionally, a load receiving base that receives a transported object from the upper belt conveyor, transports the transported object downward to the lower belt conveyor, and a vertical movement mechanism that allows the load receiving base to move up and down. In this case, a lowering transport device including a motor or a pneumatic cylinder that drives the load receiving table up and down via this vertical movement mechanism has been used. However, the lowering transport device has a complicated structure and is driven by the device. Therefore, there is a problem that it is necessary to supply artificial energy such as electric power and air pressure.

Therefore, the applicant of the present application, in the previously filed Japanese Patent Application No. 2004-328619,
A rotating body arranged at the top, a traction member wound around the rotating body from below and moved up and down with rotation of the rotating body, and connected to the traction member and moved up and down together with the traction member to be conveyed Has proposed a descending and conveying apparatus provided with a load receiving table for conveying the load receiving table and a guide member for guiding the load receiving table in the vertical direction.

The load receiving platform is a horizontal plate-like placement portion on which the object to be conveyed is placed, and a plate that is provided at a base end portion of the placement portion in a direction orthogonal to the placement portion and horizontally supports the placement portion. And a roller provided on both sides of the upper end and both sides of the lower end of the mounting posture holding unit, the mounting unit and the mounting posture holding unit, It is connected to the traction member at the crossing part.
According to this lowering and conveying apparatus, when the object to be conveyed is placed on the placing portion, the load receiving table is pulled while the roller is guided by the guide member as the rotating body rotates due to the weight of the load receiving table and the object to be conveyed. Since the lowering is performed together with the members, the object to be transported can be transported from the upper belt conveyor to the lower belt conveyor without power.

  However, in the single-support structure in which the end of the placing portion on which the object is placed is supported by the traction member, as in the case of the above-described load receiving platform, the entire load due to the object to be conveyed is a rotational moment force on this supporting portion. In particular, when the object to be transported is a heavy object, the force acting between the roller and the guide member becomes extremely large. There was a drawback that it was likely to become unstable.

  The present invention has been made in view of the above-described drawbacks. Even when the object to be conveyed is a heavy object, the conveying posture of the load receiving platform can be stabilized in the descending conveyance, and the burden on the guide member can be reduced. The object is to provide a power drop transport device.

  That is, the present invention according to claim 1 is a rotating body that is rotatably disposed at the upper and lower portions of the apparatus main body, a pulling member that is wound so as to be able to run between the rotating bodies, and the pulling member. And a load receiving platform on which the object to be conveyed is placed, and the object to be carried placed on the load receiving table at the upper supply position is conveyed to the lower discharge position by the traveling of the pulling member. The load receiving table is provided with a support member orthogonal to the load receiving table at the center of the side, and is rotatably supported by the pulling member at the intersection. The apparatus main body includes a guide member that is arranged in the vertical direction along the traction member at least from the supply position to the discharge position and guides the support member so as to maintain the loading posture of the load receiving table. With features To have.

  The present invention described in claim 2 is characterized in that the load receiving table includes a loading table on which the object to be transported is placed, and a holding member that is supported by the pulling member and holds the loading table from below. The loading platform described above is pivotally connected to the discharge-side end of the holding member, and has the other end of the loading platform lowered at a portion facing the unloading position of the apparatus body. It is characterized in that a locking portion is provided which is locked before reaching the carry-out position and tilts the loading platform described above so that the discharge side is downward as the holding member descends.

  According to a third aspect of the present invention, there is provided the non-powered descent conveyance apparatus according to the second aspect, wherein the loading platform is connected to the holding member so as to be movable up and down at the connecting portion and is opposed to the connecting portion. The supply side end portion is provided with a rotation support portion serving as a rotation fulcrum of the loading platform described above, and the apparatus main body is configured to drive the rotation body and mount the object to be conveyed. Auxiliary power that can be transported from the discharge position to the supply position, and the other end of the loading platform ascending to the part corresponding to the supply position of the apparatus body is locked at the supply position, As the holding member is raised, an upper stage stopper is provided for inclining the loading platform described above so that the discharge side is upward.

According to the first to third aspects of the present invention, since the load receiving platform is supported by the traction member at the center of the side portion, during the descending transfer of the object to be transferred, which is a problem with the conventional load receiving platform, The rotational moment force generated in the support portion of the load receiving table due to the weight of the conveyed product can be reduced as much as possible, and the weight of the conveyed product can be mainly used as the force in the descending direction. As a result, it is possible to significantly reduce the load applied to the support portion and the guide member in the lowering conveyance of the object to be transported, thereby improving the durability and stabilizing the conveyance posture of the load receiving table during the lowering conveyance. .
In addition, if the cargo cradle is structured to be supported by the pulling member at the center of the side, supply of the transported object to the load cradle is the same direction as or opposite to the carry-out direction regardless of the carry-out direction of the transported object. It becomes possible to do from either direction.

  Further, according to the present invention described in claim 2, since only the support member is lowered while the one end portion of the loading table is locked to the locking portion at the unloading position when the conveyed object is lowered and transferred, The descent speed of the loading platform can be reduced to mitigate the impact at the time of stopping, and the discharge side of the loading platform is tilted downward so that the object to be conveyed is carried out, so that smooth unloading can be performed with little impact. become.

  Further, according to the third aspect of the present invention, since the auxiliary machine power is provided, not only the non-powered descent conveyance of the conveyed object but also the conveyed object is positioned above the lower position by the auxiliary power. In addition, when the transported object is transported upward, the transported object is transported with the discharge side of the loading table inclined upward at the upper position, so that smooth transport with less impact is performed.

Hereinafter, based on FIGS. 1-3, embodiment of the non-power-falling conveyance apparatus of this invention is described.
FIG. 1 is a side view showing an overall configuration of a non-powered descent carrying apparatus according to the present embodiment, FIG. 2 is a partial front view, and FIG. 3 is a view showing a support mechanism for a receiving platform.

  As shown in FIG. 1 and FIG. 2, the non-powered descent conveying apparatus according to the present embodiment is a vertically long casing 1 (apparatus main body) having a frame assembly structure including frames 1a, 1b and the like movably installed on the floor. 1, rotatable sprockets (rotating bodies) 2 a and 2 a and sprockets 2 b and 2 b respectively connected via a sprocket shaft 2 are arranged on the upper and lower portions of the housing 1. Endless chains (traction members) 3 and 3 are respectively wound around a pair of sprockets 2a and 2b.

  Between these chains 3 and 3, a load receiving platform 4 on which the object to be conveyed W is placed is disposed in a horizontal posture, and is installed on a table 40 on the supply side of the object to be conveyed W. The transported object W supplied from the moving table 50 to the load receiving platform 4 is transported downward and transported to the transport platform 60 installed on the floor on the discharge side.

As shown in FIG. 3A, the load receiving platform 4 includes a loading platform 5 on which the article W to be transported is placed, and a plate-like holding member 6 that supports the loading platform 5 from below.
The loading platform 5 is composed of a rectangular frame 7 and a plurality of rollers 8 rotatably provided on the frame 7, and these rollers 8 are arranged with respect to the side of the frame 7. They are arranged in parallel from the supply side to the discharge side while being axially attached in the orthogonal direction. Further, an engagement protrusion 19 is provided at the supply side tip of the frame body 7 so as to protrude toward the supply side.
The holding member 6 is formed so that the depth dimension (the dimension on the supply side end portion to the discharge side end portion) is shorter than the depth dimension of the loading table 5, and an intermediate portion of the loading table 5 is placed on the upper surface thereof in a well-balanced manner. In addition, the side portion of the loading platform 5 (frame body 7) is pivotally connected to the discharge-side end portion of the holding member 6 by the hinge mechanism 9, so that the loading platform 5 and the loading platform 5 are held. The member 6 has a hinge mechanism 9 as a fulcrum, and the supply side is detachable.
The hinge mechanism 9 is fitted between the vertically long holes 6a provided on both sides of the holding member 6 and the pins 17 projecting from the both sides of the frame 7 corresponding to the vertically long holes 6a to the side. In the connecting portion, the loading table 7 can move up and down with respect to the holding member 6.

  In addition, a plurality of (four) open concave notches 26 are juxtaposed in the lateral direction at the supply side end of the holding member 6 with respect to the longitudinally long hole 6a, and one of the concave notches 26 is provided. A support shaft 27 that engages with each other protrudes from the side of the frame body 7 toward the side, and the concave notch portion 26 and the support shaft 27 constitute a rotation support portion 28, and this rotation support is provided. The loading table 7 can be rotated by the hole size of the above-described vertically long hole 6a with the portion 28 as a fulcrum.

  Then, pivots 10 project from the central portions on both sides of the holding member 6 toward the sides, and the holding member 6 is pivotally attached to the chain 3 via the pivot 10. Yes. In addition, a vertically long roller mounting plate 11 (support member) is fixed in the vertical direction along the chain 3 at the central portion of both sides of the holding member 6, and a plurality of guide rollers are attached to the roller mounting plate 11. 12 is rotatably provided at an upper position and a lower position of the pivot 10.

  On the other hand, a guide rail 13 along the chain 3 is provided in the vertical direction from the upper end to the lower end of the housing 1. As shown in FIG. 3B, the guide rail 13 is formed of a U-shaped member in cross section, and the plurality of guide rollers 12 described above are sandwiched between the U-shaped portions, so that the load receiving platform 4 (holding member 6). ) Is held in a substantially horizontal posture (loading posture).

  In addition, a locking portion 14 that can be engaged with the engaging protrusion 19 of the frame body 7 described above is provided at a portion facing the discharge position of the frame 1a (position where the transport carriage 60 is disposed), and the load receiving base that descends. 4 (loading table 5), the end on the supply side is locked by this locking portion 14 before reaching the unloading position, and the loading table 5 is lowered on its discharge side as the holding member 6 is lowered. The to-be-conveyed object W is carried out by making it incline.

  A counterweight 16 protected by a cover member 18 is connected to the chain 3 on the side facing the load receiving table 4 via the upper and lower sprockets 2a, 2b. The counterweight 16 has a weight capable of driving the empty load receiving platform 4 on which the article to be conveyed W is not placed upward via the upper and lower sprockets 2a and 2b and the chain 3, and the object to be conveyed W is placed thereon. The weight is set so that the placed cradle 4 can be driven downward via the upper and lower sprockets 2 a and 2 b and the chain 3.

Further, an upper stopper 20 is provided at the supply position of the frame 1a to prevent further lifting operation of the load receiving platform 4, and a limit switch 25 is provided on the side of the frame 1b facing this.
The limit switch 25 is set at a position slightly higher than the upper end stopper 20, and a lock mechanism 29 is provided below the upper stage stopper 20 to prevent inadvertent lowering of the receiving platform 4. On the other hand, a lower stopper mechanism 21 is provided at the discharge position of the guide rail 13 to prevent further lowering operation of the load receiving platform 4.

  In the present embodiment, a power machine 24 for driving the sprocket 2a is connected to the upper part of the housing 1 via a transmission mechanism such as a clutch 22 and a power electric gear 23 to the sprocket shaft 2 of the upper sprocket 2a. In addition, it can be used as auxiliary machine power when the load receiving platform 4 that has been unloaded after being unloaded at the discharge position is raised to the supply position.

In the non-powered descent conveying apparatus having the above configuration, when the object to be conveyed W is supplied from the upper moving table 50 onto the loading table 5 of the object receiving table 4, the total weight of the object receiving table 4 and the object to be conveyed W is the counterweight. 16, the chain 3 travels between the sprockets 2a and 2b at a speed corresponding to the weight difference, and the load receiving platform 4 on which the article W to be transported is lowered.
At this time, the guide roller 12 provided at the center of the side of the holding member 6 of the load receiving platform 4 is supported and guided by the guide rail 13, so that the loading posture of the object W to be conveyed by the load receiving table 4 is held horizontally. The load receiving platform 4 can be lowered in the state.

Before the load receiving platform 4 is lowered and reaches the discharge position, the engagement protrusion 19 of the loading platform 5 engages with the locking portion 14 of the frame 1a, and thereafter, only the holding member 6 is lowered to sequentially move the loading platform 5. Since the discharge side is inclined so as to be on the lower side, the article W to be conveyed is smoothly unloaded from the load receiving platform 4 to the conveyance cart 60 at the discharge position.
Since a plurality of rotating rollers 61 are arranged in parallel in the discharge direction on the transport table 64 of the transport cart 60, the delivery of the article W to be transported from the load receiving table 4 to the transport table 60 is smooth and easy. It is. The transport table 60 is movable on the floor, and the height position of the transport table 64 can be freely adjusted according to the height of unloading at the discharge position by operating the hydraulic elevator 62 on the pedal 63. It can be done.

When the holding member 6 is lowered while the end of the loading table 5 is locked to the locking portion 14 at the discharge position, the vertical force for lowering the load receiving table 4 is partially applied to the locking portion 14. Since it is supported and shared, the descending speed of the load receiving platform 4 is decelerated accordingly, which contributes to shock mitigation when stopped.
The amount of descent force shared by the locking portion 14 can be adjusted by making the position of the hinge mechanism 9 provided on the holding member 6 variable. That is, as the hinge mechanism 9 approaches the discharge side, the share amount increases and the descending force of the load receiving platform 4 decreases. Conversely, as the hinge mechanism 9 approaches the central portion, the amount of sharing decreases, and the descending force of the load receiving platform 4 increases.

  Since the weight of the empty load receiving platform 4 from which the conveyed object W is carried out is lighter than the weight of the counterweight 16, the load receiving platform 4 slowly rises to the upper supply position.

  Further, in the present embodiment, as described above, the auxiliary machine power by the power machine 24, the clutch 22, and the like is provided on the upper portion of the housing 1, and therefore the transported object W is moved to the lower position (discharge position) using this auxiliary machine power. ) And transported to an upper position (supply position).

When the load receiving platform 4 on which the article W to be transported is lifted by the operation of the auxiliary machine power and reaches the supply position, the engagement protrusion 19 of the loading platform 5 contacts the upper stopper 20 of the frame 1a, and thereafter Since only the holding member 6 is raised, and the loading table 5 is rotated with the rotation support portion 28 as a fulcrum as the holding member 6 is raised, the loading table 5 is inclined so that the loading table 5 is gradually above the discharge side. The transferred object W is smoothly carried out from the receiving table 4 to the moving table 50 at the position.
When the end of the loading platform 5 is detected by the limit switch 25, the power supply to the power machine 24 and the clutch 22 is cut off, and the ascending operation of the loading platform 4 is stopped. Further, the load due to the rotation of the loading platform 5 can be adjusted by changing the protruding position of the support shaft 27 and shifting the position of the rotation support portion 28 in the lateral direction.

As described above, according to the non-powered descent conveying apparatus according to the present invention, since the load receiving platform 4 is supported by the chain 3 at the center of the side, when the object W is placed on the load receiving platform 4, The support balance of the load receiving platform 4 is lost, and a rotational moment force due to the weight of the transferred object W acts on the support portion. However, during the descending transfer, the placement position of the transferred object W is stabilized and the load receiving table 4 is supported. Because of the balance, the rotational moment force acting on the roller mounting plate is extremely small, and the weight of the conveyed object W mainly acts as a vertical force. As a result, the load (load) applied to the guide rail 13 is greatly reduced, the durability is improved, and the transport posture of the load receiving platform 4 in the descending transport can be stabilized.
In addition, if the load receiving platform 4 is structured to be supported by the chain 3 at the center of the side portion, the supply of the transported object W to the load receiving platform 4 can be performed regardless of the unloading direction of the transported object W. This can be performed from any direction in the depth direction (the left side or the right side of the housing 1 in FIG. 1).

  Further, when the transported object W is lowered and transported, only the holding member 6 is lowered while the engaging projection 19 of the loading table 5 is locked to the locking portion 14 at the unloading position. Is reduced, and the impact at the time of stopping can be mitigated, and the discharge side of the loading platform 5 is inclined downward so that the transported object W is carried out, so that smooth carry-out with less impact is performed.

  In addition to transporting the transported object W with no power, it is possible to transport the heavy transported object W to the upper position without relying on human power by operating auxiliary power. The value is extremely large.

The side view which shows the whole structure of the non-powered descent | fall carrying apparatus by embodiment of this invention. The partial front view of a powerless descent | fall conveyance apparatus. (A) is a side view which shows the support mechanism of a load receiving stand, (b) is the principal part top view.

Explanation of symbols

1 Device body (housing)
2a, 2b Rotating body (sprocket)
3 Towing member (chain)
4 Loading platform 5 Loading platform 6 Holding member 11 Support member (roller mounting plate)
13 Guide member (guide rail)
14 Locking part 20 Upper stopper 28 Rotation support part W Conveyed object

Claims (3)

Rotating bodies that are rotatably arranged at the upper and lower portions of the apparatus main body, a traction member that is wound so as to be able to travel between the rotators, and an object to be conveyed supported by the traction member. A non-powered descent conveying device that conveys an object to be conveyed placed on the load receiving table at an upper supply position to a lower discharge position by traveling of the pulling member,
The load receiving platform is provided with a support member orthogonal to the load receiving platform at the center of the side, and is rotatably supported by the pulling member at the intersection, and the apparatus main body is at least from the supply position. A non-powered descent conveying device comprising a guide member that is arranged vertically along the traction member between the discharge position and guides the support member so as to maintain a loading posture of the load receiving platform. . The loading platform includes a loading platform on which the object to be transported is placed, and a holding member that is supported by the pulling member and holds the loading platform from the lower side, and the loading platform is configured to discharge the holding member. It is pivotally connected to the end on the side,
In addition, the other end of the loading platform is lowered before reaching the unloading position at a portion facing the unloading position of the apparatus main body, and the loading platform is moved to the discharge side when the holding member is lowered. The non-powered descent conveying device according to claim 1, further comprising an engaging portion that is inclined so as to be downward. The loading platform is connected to the holding member so as to be movable up and down at the connection portion, and a rotation support portion serving as a rotation fulcrum of the loading platform is provided at the supply side end facing the connection portion,
In addition, the apparatus main body includes auxiliary power that can drive the rotating body to convey the receiving table on which the object to be conveyed is placed from a discharge position to a supply position, and supply the apparatus main body An upper stage stopper that locks the other end portion of the loading platform ascending to the position corresponding to the position at the supply position, and tilts the loading platform so that the discharge side is upward as the holding member is raised. The non-powered descent conveying device according to claim 2, wherein

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