JP2007119128A - Non-powered descending and conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-powered descending and conveying device capable of reducing an installation space and reducing noise during work conveyance. <P>SOLUTION: This non-powered descending and conveying device is provided with disk members 2a rotatably arranged at upper and lower parts of a device main body, respectively; an endless member 3 wound between the disk members 2a so as to freely travel; and an L-shaped loading table 4 rotatably journaled to the endless member 3 and comprising a loading plate 5 and a support plate 6 lighter than the loading plate 5. The device main body has a descending guide member 10 for guiding the support plate 6 downwardly between a supply position to the lower disk member 2a. The descending guide member 10 is provided with an inclined part 10a for guiding the support plate 6 gradually descending along with the traveling of the endless member 3 to switch the loading plate 5 to a loading posture, around the upper disk plate member 2a; and with a vertical part 10b continued to the inclined part 10a and holding the loading posture of the loading plate 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a non-powered descent conveying device that conveys an object to be conveyed from an upper position to a lower position without power.

For example, when the object to be transported is 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 lower transport device between the upper and lower belt conveyors.
Conventionally, a receiving object is received from the upper belt conveyor, the receiving object is conveyed downward and delivered to the lower belt conveyor, a vertical movement mechanism that allows the receiving table to move up and down, A descent conveyance device provided with a motor, a pneumatic cylinder, and the like for driving the load receiving table up and down via the vertical movement mechanism has been used. However, the descent conveyance device has a complicated structure and is used for driving the device. There is a problem that it is necessary to supply artificial energy such as electric power and air pressure.

  Therefore, in view of such problems, the present applicant has previously proposed a non-powered descent conveying device that can convey the object to be conveyed from the upper position to the lower position without power.

  As shown in FIG. 4, the non-powered descent conveying device includes a frame 51 erected on the floor, sprockets 52 a and 52 b that are rotatably arranged on the upper and lower parts of the frame 51, and the sprockets 52 a and 52 b, A chain 53 wound so as to be able to run between 52b, and a loading base 54 on which a work W is placed, spaced apart in the extending direction of the chain 53, are schematically configured. The base 54 is formed in an L shape by a loading plate 55 on which the workpiece W is placed and a support plate 56 integrally provided in a direction orthogonal to the base end portion of the loading plate 55. It is pivotally attached to the chain 53 by a pivot 57 at the intersection.

  In the non-powered descent conveying apparatus having the above-described configuration, when the workpiece W paid out from the belt conveyor A is placed on the loading plate 55, the chain 53 moves between the sprockets 52a and 52b by the weight of the loading platform 54 and the workpiece W. The loading platform 54 on which the work W has been carried down descends and transports the work W. By this transport operation, the subsequent loading platform 54 is transported to the supply position of the workpiece W, and the workpiece W can be sequentially transported downward.

By the way, inside the upper sprocket 52a, as shown in the figure, a rotatable disk member (dispensing guide plate 58) that supports the loading table 54 is provided concentrically.
As a result, the loading table 54 that has been moved with the loading plate 55 facing downward is gradually raised while the loading plate 55 is in contact with and supported by the outer periphery of the payout guide plate 57 around the upper sprocket 52a. The weight 57 rotates downward with the pivot 57 as a fulcrum, and automatically shifts from a standing state to a horizontal state where loading is possible on the workpiece supply side.

However, since the loading plate 55 largely protrudes upward around the upper sprocket 52a by such a rotation operation of the loading plate 54, it is necessary to secure a sufficient space above the sprocket in consideration of the protrusion. There was a problem that there was.
Further, since the impact when the loading plate 55 shifts from the standing state to the horizontal state where the loading plate 55 can be loaded is transmitted from the pivot 57 to the chain 53, there is a problem that a large noise is generated by the vibration.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a non-powered lowering conveyance device that reduces installation space and reduces noise during workpiece conveyance.

  That is, the present invention according to claim 1 is a non-powered descent conveying device that conveys an object to be conveyed placed on a loading platform at an upper supply position to a lower discharge position, and is erected on the floor. An apparatus main body, a disk member rotatably disposed on the upper and lower portions of the apparatus main body, an endless member wound around the disk member so as to be able to travel, and the object to be conveyed are placed And a support plate that is lighter than the above-described load plate integrally provided in a direction intersecting with the load plate at a base end portion of the load plate, and an intersection of the load plate and the support plate And a loading platform pivotally attached to the endless member, wherein the apparatus main body descends to guide the support plate downward between the upper disk member and the lower disk member. A guide member, and the lowering guide member includes the upper disk portion An inclined portion that guides the support plate that gradually descends as the endless member travels around and shifts the loading plate to the loading posture, and is connected to the inclined portion to maintain the loading posture of the loading plate. And a vertical portion.

  According to a second aspect of the present invention, in the non-powered descent conveying apparatus according to the first aspect, a rotatable roller is provided at a portion of the support plate that contacts the lowering guide member. .

  Further, the present invention according to claim 3 is the non-powered descent conveying apparatus according to any one of claim 1 or claim 2, wherein the endless member is conveyed around the upper disk member. The present invention is characterized in that a shock-absorbing member that restricts the jumping associated with the shaking of the packing plate is provided.

  According to a fourth aspect of the present invention, there is provided the non-powered descent conveying apparatus according to any one of the first to third aspects, wherein the upper and lower disk members are larger than the width dimension of the loading platform described above. And a pair of endless members wound between the upper and lower circular disk members mesh with each other at the same height and synchronously rotate with each other. It is characterized by being connected via a gear.

According to the invention described in any one of claims 1 to 4, the loading plate does not stand up due to the difference in weight between the loading plate and the supporting plate constituting the loading table around the upper disk member, and the tip portion thereof is It will always be facing downward. Thereby, when installing the apparatus, it is not necessary to secure a space in consideration of the standing of the loading plate above the upper disk member, and the installation space can be reduced.
In addition, by providing the descending guide member, the support plate that gradually descends as the endless member travels is first guided to the inclined portion so that the loading plate is shifted to the loading posture, and further, the loading posture of the loading plate in the vertical portion. Therefore, the movement of the loading plate to the horizontal state where it can be loaded after passing around the upper disk member is smoothly performed, and no large noise is generated at this time. Further, the structure of the guide mechanism for that purpose is very simple.

  According to the second aspect of the present invention, since the rotatable roller is provided at the portion of the support member that contacts the lowering guide member, the support member is smoothly guided on the lowering guide member. The operation of shifting the loaded plate to a state where it can be loaded can be performed more smoothly.

By the way, around the upper disk, the loading platform pivotably attached to the chain is not restricted by any guide member, and is in a free movement state in which the loading plate and the support plate are weight balanced with the pivot as a fulcrum. Since the carriage is transported, the loading platform is swung up and down around the support shaft due to vibrations during chain running, etc., causing the loading board to jump up, which generates noise and smoothly carries the loading platform. There is a risk of disappearing.
In this regard, according to the invention described in claim 3, by providing a buffer member and restricting the jumping of the loading plate around the upper disk member, it is possible to suppress the shaking of the loading table, and thus the support plate The operation when coming into contact with the inclined portion is stably performed. Thereby, the transition operation | movement to the state which can mount the loading board mentioned above comes to be performed more smoothly.

Further, since the upper and lower disk members arranged opposite to each other are arranged in an independent state in the main body device, there is a possibility that each upper and lower disk member is driven independently and each endless member runs asynchronously. When the endless member travels asynchronously, the loading table pivotally attached to the endless member loses its balance in the conveying direction and is shaken. As a result, the loading table is not smoothly transported.
In this respect, according to the fourth aspect of the invention, the endless members wound between the upper and lower disk members are connected to each other via the gears that rotate in synchronization with each other. It will run, and the loading platform pivotally attached to these endless members can be conveyed with good balance. Thereby, the shaking of the loading table at the time of conveyance can be reduced, and as a result, the above-described operation of shifting the loading plate to a state where the loading plate can be loaded is performed more smoothly.

Hereinafter, based on FIGS. 1-3, embodiment of the non-power-falling conveyance apparatus of this invention is described.
FIG. 1 shows an unpowered descent conveying apparatus according to the present embodiment, FIG. 2 shows an enlarged main part of FIG. 1, and FIG. 3 shows a moving state of the loading platform around the upper sprocket.

  As shown in FIG. 1, the non-powered descent conveyance device of the present embodiment is disposed rotatably on a frame (device main body) 1 standing on the floor and on the upper and lower portions of the frame 1 via a shaft 11. Sprockets (disk members) 2a, 2b, a chain (endless member) 3 wound around these sprockets 2a, 2b, and an extending direction of the chain 3, spaced apart from each other. This is generally constituted by a loading table 4 on which the workpiece W is placed.

The upper sprockets 2a, together are a pair arranged at a larger amount distance than the width of the loading platform 4 above the delivery unit A ₁ of the upper belt conveyor A, the lower sprocket 2b, the lower belt conveyor A pair is similarly arranged above B. The two chains 3 wound between the upper and lower sprockets 2a and 2b are connected by the gear mechanism 20 at the same height position. As shown in FIG. 2 (b), the gear mechanism is composed of a gear shaft 21 and a pair of gears 22 and 22 that are fixed to both ends of the gear shaft 21 and mesh with the chain 3 to rotate synchronously. Yes.

The loading table 4 includes a rectangular plate-shaped loading plate 5 on which the workpiece W is placed, and a support plate 6 that is integrally provided at a base end portion of the loading plate 5 in a direction orthogonal thereto. It is formed in an L shape, and is pivotally attached to the chain 3 via pivots 7 projecting from both sides in the width direction at intersections of the loading plate 5 and the support plate 6. In addition, as shown to Fig.2 (a), the reinforcement member 15 for hold | maintaining both at right angles between the loading board 5 and the support plate 6 is arrange | positioned.
In this loading table 4, rollers 8 are rotatably provided on pivots 7 projecting from both sides thereof, and rollers 9 are also rotatably provided on both sides of the lower portion of the support plate 6.

On the other hand, on the frame 1, the guide (drop roller 8 and the roller 9 between the upper delivery unit A ₁ of the upper belt conveyor A as the supply position of the workpiece W to the winding start position of the chain 3 by the lower sprockets 2b A guide member 10 is provided in the vertical direction.
The guide 10 is provided with an inclined portion 10a that guides the roller 9 downward and shifts the loading plate 5 to a loading posture, and is connected to the inclined portion 10a so that the loading posture of the loading plate 5 is maintained. And a vertical portion 10b that supports the support plate 6 in a substantially vertical posture by sandwiching the rollers 8 and 9 therebetween.
The inclined portion 10a extends the guide side of the roller 9 of the vertical portion 10b somewhat toward the inside (the center side of the upper sprocket 2a), and is loaded so that the loading plate 5 can be surely shifted to the loading posture. It is arranged with a suitable inclination angle in consideration of the inclination of the loading table 4 determined by the weight balance between the plate 5 and the support plate 6 and the pressing force to the inclined portion 10a by the support plate 6.
That is, as shown in FIG. 3, the angle θ of the support plate 6 with respect to the inclined portion 10a when the roller 9 comes into contact becomes an acute angle, and then the contact angle θ as the support plate 6 is guided downward. The inclination angle of the inclined portion 10a is set so that becomes an acute angle. The contact angle θ reaches 0 ° when reaching the vertical portion 10b.

  Further, at the position extending from the side of the lower sprocket 2b to the lower side, it is disposed so as to face the tip of the loading plate 5 with a gap along the track of the tip of the loading plate 5 inclined by the payout guide plate 12. A flat lower guide member 13 is provided. The lower guide member 13 is a concave curved portion 13a formed concentrically with the lower sprocket 2b, and a discharge position from the lower end of the concave curved portion 13a. It is comprised from the inclination part 13b which inclines below toward the low-order belt conveyor B, and the front-end | tip corner | angular part of the workpiece | work W sliding down by the inclination of the loading board 5 is latched to the intermediate part of the concave curved part 13a. A convex portion 14 is formed.

  On the other hand, a flat guide plate 16 is disposed in the vertical direction from the vicinity of the winding end position of the chain 3 by the lower sprocket 2b to the vicinity of the winding start position of the chain 3 by the upper sprocket 2a. A gear shaft 21 of the mechanism 20 is rotatably attached.

  In addition, a rectangular plate-shaped buffer member 25 is suspended from the frame 1 along the shaft 11 between the upper sprockets 2a and 2a facing each other at a position above the payout portion A1. As shown in FIG. 2A, the buffer member 25 acts as a stopper that restricts the jumping of the loading plate 5 caused by vibration during traveling around the upper sprocket 2a. In order to reduce as much as possible, the lower surface 25a with which the loading plate 5 abuts is provided with a flexible material such as round rubber.

In the non-powered descent conveying apparatus having the above configuration, the workpiece W conveyed by the upper belt conveyor A is dispensed at the dispensing unit A ₁ and supplied onto the loading plate 5 of the loading table 4. Then, the chain 3 travels between the sprockets 2a and 2b due to the weight of the loading table 4 and the workpiece W, and the loading table 4 on which the workpiece W is loaded descends. At this time, since the guide 10 is provided on the frame 1, the rollers 8 and 9 provided on the pivot 7 and the support plate 6 are guided by the guide 10, so that the loading posture of the workpiece W by the loading plate 5 can be changed. The loading platform 4 can be lowered while being held.
On the other hand, due to the lowering operation of the loading table 4, the subsequent loading table 4 is conveyed to the supply position of the workpiece W and can sequentially convey the workpiece W. The workpiece W is loaded around the lower sprocket 2 b. It slides down from the plate 5 and is delivered from the concave curved surface 13a of the lower guide plate 13 to the lower belt conveyor B through the inclined portion 13b.

  Next, the unloaded loading platform 4 is raised toward the upper sprocket 2a by the travel of the chain 3 by the continuous workpiece transfer operation. In this ascending path, the above-described guide plate 16 is disposed in place of the above-described guide 10, so that the loading table 4 pivotally attached to the chain 3 includes the loading plate 5 and the support plate. 6, the loading plate 5 rises along the guide plate 16 in a suspended state with no deflection. In the above transport process, the two left and right chains 3 wound between the upper and lower sprockets 2a and 2b travel synchronously by the gear mechanism 20, so that the loading platform 4 pivotally attached to these chains 3 has a good left / right balance. There is little shaking of the loading table 4 being conveyed and being conveyed.

  Around the upper sprocket 2a, as shown in FIG. 3, the loading plate 5 does not stand up due to the weight balance between the loading plate 5 and the support plate 6 with the pivot 7 as a fulcrum, and its tip is always directed downward. It moves while changing its direction along the upper sprocket 2a. On the workpiece supply side, first, the roller 9 at the tip of the support plate 6 contacts the inclined portion 10a of the guide 10, and the support plate 6 is guided downward along the inclined portion 10a. By the guiding operation of the support plate 6 by the inclined portion 10a, the loading plate 5 is gradually shifted to the loading posture, and reaches the vertical portion 10b so that the roller 9 and the roller 8 are sandwiched to guide the inside of the guide 10 downward. As a result, the loading table 4 descends while maintaining the loading posture of the workpiece W by the loading plate 5.

  As described above, according to the non-powered descent conveyance device having the above-described configuration, the loading plate 5 does not stand up and the tip portion is always downward due to the weight balance between the loading plate 5 and the support plate 6 around the upper sprocket 2a. Therefore, when installing the apparatus, there is no need to secure a space in consideration of the standing of the loading plate 5 as in the prior art, and the installation space can be reduced.

  On the workpiece supply position side, the inclined portion 10a of the guide 10 smoothly moves the loading plate 5 to the horizontal state where the loading plate 5 passes around the upper sprocket 2a and can be loaded. Will no longer occur. Further, the inclined portion 10a for that purpose is an extension of the guide side of the roller 9 of the vertical portion 10b, and therefore the structure is very simple.

  Further, since the buffer member 25 is suspended in the vicinity of the upper sprocket 2a, the jumping of the loading plate 5 is restricted around the upper sprocket 2a, and the shaking of the loading table 4 can be suppressed. As a result, the contact operation of the support plate 6 to the inclined portion 10a is stably performed, and the rotatable roller 9 contacts the inclined portion 10a. Therefore, the transition operation to the state where the loading plate 5 can be loaded can be performed more smoothly.

The figure which shows one Embodiment of the non-power-falling conveying apparatus which concerns on this invention. The principal part expansion of FIG. 1 is shown, (a) is a front view, (b) is a side view. Explanatory drawing which shows the movement state of the loading platform around an upper sprocket. The figure which shows the conventional non-power-falling conveying apparatus.

Explanation of symbols

1 frame (device body)
2a, 2b Sprocket (disc member)
3 Chain (endless member)
4 Loading platform 5 Loading plate 5a Protrusion 6 Support plate 8, 9 Roller 10 Guide (Descent guide member)
10a Inclined portion 10b Vertical portion 22 Gear 25 Buffer member W Workpiece (conveyed object)

Claims (4)

A non-powered descent conveying device that conveys an object to be conveyed placed on a loading platform at an upper supply position to a lower discharge position,
An apparatus main body standing on the floor, disk members rotatably disposed on the upper and lower portions of the apparatus main body, an endless member wound around the disk members so as to be able to travel, and the conveyed object A loading plate on which an object is placed and a supporting plate that is lighter than the above-described loading plate integrally provided in a direction intersecting the loading plate at a base end portion of the loading plate, and the loading plate and the supporting plate A loading platform pivotally attached to the endless member at the intersection with
The apparatus main body has a lowering guide member that guides the support plate downward between the upper disk member and the lower disk member, and the lowering guide member is around the upper disk member. In this embodiment, the support plate that gradually descends as the endless member travels to guide the support plate to shift the loading plate to the loading posture, and the vertical portion that is connected to the inclined portion to maintain the loading posture of the loading plate. And a non-powered descent conveying device. The non-power-lowering conveying apparatus according to claim 1, wherein a rotatable roller is provided at a portion of the support plate that contacts the descending guide member. 3. The shock absorber according to claim 1, wherein a buffer member is provided around the upper disc member to regulate the jumping of the load plate that is conveyed along with the travel of the endless member. The non-powered descent conveying device described. The upper and lower disk members are arranged in pairs with a distance greater than the width dimension of the loading platform described above, and the endless members wound between the upper and lower disk members are at the same height position. 4. The powerless lowering and conveying device according to claim 1, wherein the powerless lowering and conveying device is connected through a pair of gears that mesh with the endless member and rotate synchronously with each other. 5. .

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