JP7347310B2 - Conveyance device - Google Patents

Description

The present invention relates to a conveyance device. Specifically, there is a downward-sloping upper conveyor that allows the conveyed items to flow from the upstream supply table to the downstream receiving table using its own weight, and a downward-sloping upper conveyor that is installed below the upper conveyor and moves the conveyed items onto the receiving table using its own weight. The present invention relates to a conveying device having a downward slope lower stage conveyor that conveys the flow in a folded manner.

A workpiece conveyance device is disclosed that conveys a parts box filled with workpieces along a downwardly sloped roller conveyor by its own weight. This workpiece conveyance device consists of a downward-sloping delivery conveyor that carries empty parts boxes downstream by their own weight, and a conveyor that carries in empty parts boxes and, after filling them with parts, folds the parts boxes back downstream by their own weight. and a downwardly sloped discharge conveyor.

At the turning point between the carry-in conveyor and the carry-out conveyor, an elevating platform is provided which can switch the connection between the carry-in conveyor and the carry-out conveyor by raising and lowering. This elevating platform is held in a position connected to the carry-in conveyor by spring force, and when empty parts boxes are loaded onto the top of the lift platform, the weight of the platform lowers the platform and connects it to the carry-out conveyor. It is said that

Japanese Patent Application Publication No. 09-136715

In the above-mentioned workpiece conveyance device, there is a possibility that the lifting platform cannot be lowered appropriately depending on the weight of the parts box. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a conveying device that can appropriately turn and convey conveyed objects without using power.

In order to solve the above problems, the conveying device of the present invention takes the following measures.

That is, the conveying device of the present invention includes a downwardly sloped upper conveyor that allows the conveyed items to flow from the upstream supply table to the downstream receiving table by its own weight, and a downwardly sloped upper conveyor that is provided below the upper conveyor and supplies the articles onto the receiving table. This is a conveying device that includes a downwardly sloped lower stage conveyor that allows conveyed objects to flow in a folded manner due to their own weight. This conveyance device includes a first switching mechanism, a second switching mechanism, and a pushing mechanism.

The first switching mechanism switches the supply platform between a first upper stage position where it is connected to the upper stage conveyor and a first lower stage position where it is connected to the lower stage conveyor by rotating the supply table around the horizontal axis. The first switching mechanism includes a first biasing part that holds the supply table at the first upper position by biasing, a first operation part that lowers the supply table to the first lower position by user's operation, and and a first locking portion that locks the supply stand in the first lower position.

The second switching mechanism switches the receiver between a second upper stage position where it is connected to the upper stage conveyor and a second lower stage position where it is connected to the lower stage conveyor by rotating the receiving table around the horizontal axis. The second switching mechanism includes a second biasing section that holds the receiving stand at the second upper position by urging, and a second operating section that lowers the receiving stand to the second lower position by a user's operation.

The pushing mechanism causes the conveyed object, which has been swept onto the lower stage conveyor, to ride on the supply stage at the first lower stage position by dropping the receiving stage. The pushing mechanism includes a seesaw rail and a slider. The seesaw rail is biased to have an upward slope toward the downstream side of the lower conveyor, and is switched to a downward slope by operation of the second operating section. The slider is provided so as to be slidable in an inclination direction with respect to the seesaw rail, and when the seesaw rail slopes downward, the slider flows downstream due to its own weight and pushes out the conveyed object on the lower conveyor onto the supply table.

When the slider flows on the downwardly sloped seesaw rail to a predetermined downstream position, the first lock portion is pushed by the slider and released. As a result of this release, the supply table carrying the conveyed object is returned from the first lower position to the first upper position by force.

According to the above configuration, the user can appropriately return and transport the conveyed object between the supply table and the receiving table by the following procedure. First, a user sends a conveyed object onto an upper conveyor from a supply stand on the upstream side, and then to a receiving stand on the downstream side. Next, the user operates the first operation section to switch the supply stand to the connection state with the lower conveyor. Next, the user operates the second operation section to switch the receiving platform to a connection state with the lower conveyor, and causes the conveyed object to flow from above the receiving platform to the lower conveyor.

By the above operation, the slider flows downstream on the downwardly sloped seesaw rail, and pushes out the conveyed items on the lower conveyor onto the supply table connected to the lower conveyor. Then, as the slider flows to a predetermined downstream position, the first locking portion is unlocked, and the supply table carrying the conveyed object is returned to the connection state with the upper stage conveyor by force. As described above, the conveyed object can be appropriately turned around and conveyed between the supply stand and the receiving stand without power.

Note that the "connection" of the supply stand and the receiving stand to the upper conveyor or the lower conveyor includes a direct connection or an indirect connection via an intervening member such as a guide conveyor.

Moreover, the conveying device of the present invention may be further configured as follows. The pushing mechanism further includes a seesaw lock portion that locks the seesaw rail in a position switched to a downward slope and is pushed together with the first lock portion by the slider and unlocked when the slider flows to a predetermined downstream position.

According to the above configuration, the seesaw rail can be locked in the downward slope state by the user once operating the second operation section. Therefore, the slider can be moved downstream without the user continuing to operate the second operation section. Moreover, the above lock can be automatically released by the slider flowing to a predetermined downstream position.

Moreover, the conveying device of the present invention may be further configured as follows. The pushing mechanism further includes a slide stopper that blocks the slider at a predetermined upstream position on the seesaw rail and releases the blocking by operating the first operating section.

According to the above configuration, it is possible to prevent the slider from flowing downstream on the seesaw rail even if the second operating section is operated until after the first operating section is operated. Therefore, it is possible to prevent malfunctions in which the conveyed articles on the lower conveyor do not climb onto the supply table even if they are pushed out by the slider.

Moreover, the conveying device of the present invention may be further configured as follows. The conveyance device further includes an upwardly sloped guide conveyor that guides the conveyed articles flown onto the lower conveyor so as to ride on the supply stage at the first lower stage position by the flow toward the downstream side of the slider. have The guide conveyor is configured to stock the conveyed articles that have been flown onto the lower conveyor by hitting them at a change in slope.

According to the above configuration, the guide conveyor allows the conveyed items on the lower conveyor to appropriately ride onto the supply table. Moreover, the conveyed objects can be rationally stocked on the lower conveyor.

Moreover, the conveying device of the present invention may be further configured as follows. The first switching mechanism further includes an operation lock section that locks the operation of the first operation section by biasing, and a trigger that is pushed and moved by the conveyed object flowing on the upper conveyor to release the lock of the operation lock section. .

According to the above configuration, the operation is performed such that one conveyed article is flowed from the supply tray to the receiving tray, and then the supply tray is dropped to the first lower stage position to receive one conveyed article from the lower conveyor. It is possible to prevent the order from getting out of order.

Moreover, the conveying device of the present invention may be further configured as follows. The first switching mechanism further includes, in addition to the trigger, a manual release operation section that unlocks the operation lock section by a user's operation.

According to the above configuration, even when the conveyed object is used irregularly, such as by flowing the conveyed object from the middle, it is possible to correct the disruption of the operation order by operating the release operation section.

Moreover, the conveying device of the present invention may be further configured as follows. The conveyed object flowing from the top of the supply table through the upper conveyor onto the receiving table becomes a pallet full of workpieces, and the conveyed object flows from the top of the receiving table through the lower conveyor and back onto the supply table. It is assumed that the receiving table is an empty pallet from which workpieces have been taken out.

According to the above configuration, full pallets are conveyed to the upper conveyor and empty pallets are conveyed to the lower conveyor, so it is possible to suppress the overall size of the apparatus.

FIG. 1 is a perspective view showing a schematic configuration of a conveying device according to a first embodiment. FIG. 3 is a perspective view of the conveyance device viewed from the receiving table side. It is a side view showing an initial state of a conveyance device. FIG. 3 is a side view showing a state in which a pallet carrying workpieces is set on a supply table. FIG. 3 is a side view showing a state in which a pallet carrying workpieces has been flown onto a receiving table. FIG. 3 is a side view showing a state in which the first foot pedal is depressed. FIG. 6 is a side view showing a state in which the second foot pedal is depressed. FIG. 8 is a side view showing a state in which the slider and pallet flow downstream due to the operation shown in FIG. 7; FIG. 9 is a side view showing a state in which the supply stand and seesaw rail are returned to their initial positions by the operation shown in FIG. 8; FIG. 9 is a side view when the operation of FIG. 8 is performed with the pallet stocked. FIG. 11 is a side view showing a state in which the supply stand and seesaw rail are returned to their initial positions by the operation shown in FIG. 10; FIG. 2 is an enlarged view of the main part of FIG. 1. FIG. FIG. 13 is a view taken along arrow XIII in FIG. 12 showing the initial state of the first switching mechanism. FIG. 6 is an enlarged view showing a state in which the supply stand is lowered to a first lower position by operating the first foot pedal. It is an enlarged view showing the state where the lock of the 1st elevating part by the lock claw is released by operation of the release cable. FIG. 13 is an enlarged view showing the locked state of the operation lock section in section XVI of FIG. 12; FIG. 3 is an enlarged view showing a state in which the operation lock section is unlocked by operating a trigger. FIG. 3 is an enlarged view showing a state in which the supply table is dropped into a first lower position. FIG. 6 is an enlarged view illustrating a state in which the operation lock portion is returned to the locked state by the operation of returning the supply table to the initial position. FIG. 2 is an enlarged view showing the initial state of the slide stopper in section XX in FIG. 1; FIG. 3 is an enlarged view showing a state in which the slide stopper is unlocked by operating the first foot pedal. 3 is an enlarged view of the main part of FIG. 2. FIG. FIG. 23 is a view taken along arrow XXIII in FIG. 22 showing the initial state of the second switching mechanism. FIG. 7 is an enlarged view illustrating a state in which the receiving stand is dropped to a second lower position by operating the second foot pedal. FIG. 3 is an enlarged view showing the initial state of the tip of the seesaw rail. It is an enlarged view showing a state in which the seesaw rail is switched to a downward slope and locked by operation of the second foot pedal. It is an enlarged view showing a state in which the pushing body starts to push the pallets stocked on the lower stage conveyor by sliding of the slider. It is an enlarged view showing a state in which the pallet is pushed onto the supply table by further sliding of the slider. FIG. 6 is an enlarged view showing a state in which the seesaw lock part and the first lock part are unlocked by sliding the slider to the terminal position. It is an enlarged view showing a state in which the seesaw rail is returned to the initial position by unlocking.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

《First embodiment》
(About the schematic configuration of the transport device 1)
First, the configuration of a conveyance device 1 according to a first embodiment of the present invention will be explained using FIGS. 1 to 30. In addition, in the following description, when referring to each direction such as front, back, up and down, it refers to each direction shown in each figure. In addition, in the following explanation, the main cables, springs, and pulleys provided in the conveyance device 1 will be explained with reference numerals, but other cables, springs, and pulleys will be explained in detail and with reference numerals. The explanation will be omitted. In addition, in the following description, reference numerals not shown in the reference figures shall refer to each figure of FIGS. 1 to 30 as appropriate.

As shown in FIGS. 1 to 3, the transport device 1 according to the present embodiment is equipped with a mechanism capable of transporting a pallet PA carrying a workpiece W between a supply table 3 and a receiving table 4 by its own weight. The structure is said to be The transport device 1 has a structure in which mechanical parts such as a supply table 3 and a receiving table 4 are assembled to a device main body 2 assembled into a three-dimensional frame shape.

Here, the workpiece W used in this embodiment is an automobile bumper having a width longer than the width of the conveyance device 1. The workpiece W (bumper) has a U-shaped curve on both left and right sides. The workpiece W is placed on the pallet PA, and its right and left sides are provided in a hanging manner at each position where the conveyance device 1 is extended to the left and right.

On the other hand, the pallet PA is composed of a flat plate-shaped member that fits within the width of the supply table 3, and has cushioning material (not shown) provided on both left and right edges on which the work W can be placed in a floating state. It is said that In the following description, for convenience, the shapes of the pallet PA and the work W will be expressed in a simplified form. Here, the pallet PA corresponds to the "transferred object" of the present invention.

Specifically, the conveyance device 1 includes a supply table 3, a receiving table 4, an upper conveyor 5, a lower conveyor 6, and a guide conveyor 7. Further, the conveying device 1 includes a first switching mechanism 10, a second switching mechanism 20, and a pushing mechanism 30.

As shown in FIG. 4, the supply table 3 is a table on which an operator sets a workpiece W (and pallet PA) for supply. As shown in FIG. 5, the receiving table 4 is a table for receiving the work W (and pallet PA) that has been washed away from the supply table 3. The supply table 3 and the receiving table 4 have a structure in which a plurality of roller conveyors rotating around axes in the left-right direction are arranged flush in the front-rear direction on their upper surfaces.

The upper stage conveyor 5 is a conveyor with a downward slope that connects the supply table 3 and the receiving table 4. As shown in FIG. 7, the lower conveyor 6 is a downwardly inclined conveyor that is provided below the upper conveyor 5 and carries forward the pallet PA that has been folded back from the receiving stand 4. As shown in FIG. 10, the guide conveyor 7 is a conveyor that is connected to the lower conveyor 6 and switches the flow of the pallets PA to an upward slope. The upper conveyor 5, the lower conveyor 6, and the guide conveyor 7 also have a structure in which a plurality of roller conveyors rotating around axes in the left-right direction are arranged flush in the front-rear direction on their upper surfaces.

The first switching mechanism 10 changes the orientation of the supply table 3 into the direction in which it is connected to the upper stage conveyor 5 (see FIG. 4: first upper stage position P1) and the direction in which it is connected to the guide conveyor 7 (see FIG. 6: first lower stage position P2). This is a switching mechanism. The second switching mechanism 20 changes the orientation of the receiving tray 4 into the direction in which it is connected to the upper stage conveyor 5 (see FIG. 5: second upper stage position Q1) and the direction in which it is connected to the lower stage conveyor 6 (see FIG. 7: second lower stage position Q2). This is a switching mechanism. As shown in FIGS. 8 to 11, the pushing mechanism 30 is a mechanism for causing the pallet PA that has been sent to the lower conveyor 6 to ride onto the guide conveyor 7.

Next, the flow of the work of transporting the work W and pallet PA using the transport device 1 will be explained. The above-mentioned transport work is performed by assigning one worker to each of the front side, which is the supply side of the work W and pallet PA, and the rear side, which is the receiving side, of the transport device 1. Specifically, as shown in FIG. 4, first, an operator standing on the supply side (front side) places a pallet PA on the supply table 3 and sets a workpiece W thereon.

Next, the worker standing on the supply side manually pushes the pallet PA on the supply table 3 to flow downstream. As a result, as shown in FIG. 5, the pallet PA on which the workpiece W is placed is flown downstream (backward) on the upper stage conveyor 5 due to its own weight and is conveyed onto the receiving table 4. Next, as shown in FIG. 6, the worker standing on the supply side depresses the first foot pedal 13 of the first switching mechanism 10 located at the lower position with his or her foot. As a result, the supply table 3 is tilted downward, switched to a state connected to the guide conveyor 7, and locked.

In addition, at the above stage, the worker standing on the receiving side may take out the workpiece W from the pallet PA conveyed onto the receiving table 4. Next, as shown in FIG. 7, the worker standing on the receiving side depresses the second foot pedal 23 of the second switching mechanism 20 located at the lower position. As a result, the receiving table 4 is tilted downward, switched to a state connected to the lower conveyor 6, and locked. As a result, as shown in FIG. 8, the pallet PA on the receiving table 4 is flown downstream (frontward) on the lower conveyor 6 due to its own weight, and at the change of slope where it hits the guide conveyor 7 on the upward slope. It is transported to a location where it will be stocked.

At the same time, by operating the second foot pedal 23, the seesaw rail 31 of the pushing mechanism 30 is switched and locked in a direction that slopes downward toward the front. Thereby, the slider 32 of the pushing mechanism 30 slides on the seesaw rail 31 toward the downstream side (front side). When the slider 32 abuts against the downstream (front) end of the seesaw rail 31 due to the above slide, the pushing mechanism 30 locks the downward slope posture of the seesaw rail 31, and the first switching mechanism 10 locks the downward slope position of the seesaw rail 31. The lock of the depressed posture and the lock are respectively released.

Thereby, as shown in FIG. 9, the supply table 3 is lifted upward by the spring biasing force and returned to the initial position where it is connected to the upper conveyor 5. Moreover, the seesaw rail 31 is switched to a direction in which it slopes downward toward the rear side due to its own weight. Thereby, the slider 32 slides on the seesaw rail 31 toward the downstream side (rear side) and is returned to the initial position before sliding.

The slider 32 is slid downstream (frontward) by operating the second foot pedal 23, as shown in FIG. , functions as a device for lifting the pallet PA onto the supply table 3. Specifically, as the slider 32 slides downstream (frontward), the sliding body 32A and the pushing body 32B of the slider 32 hit the stocked pallet PA from the rear side and push the pallet PA forward. .

As a result, the pallet PA is pushed up onto the upwardly inclined guide conveyor 7 and onto the supply table 3. Thereafter, when the slider 32 abuts against the seesaw lock portion 33 provided at the downstream (front) end of the seesaw rail 31, the downward slope posture of the seesaw rail 31 is unlocked. As a result, the supply table 3 is lifted upward by the spring biasing force as shown in FIG. 11, and the pallet PA is returned to the state where it is placed on the supply table 3 which has been returned to its initial state. By repeating the above steps, the pallet PA can be repeatedly circulated between the supply table 3 and the receiving table 4 by gravity or manual force without the operator having to take out the pallet PA from the transport device 1 or lift it up and set it again. I can do it.

(About the configuration of the first switching mechanism 10)
Hereinafter, the specific configuration of each part of the transport device 1 will be explained in detail. First, the configuration of the first switching mechanism 10 will be explained in detail. As shown in FIGS. 12 and 13, the first switching mechanism 10 includes a first rotating shaft 11, a first urging section 12, a first foot pedal 13, a first lifting section 14, and a first locking section. 15, an operation lock section 16, a trigger 17, and a release operation section 19. Here, the first rotating shaft 11 corresponds to the "horizontal axis" of the present invention, and the first foot pedal 13 corresponds to the "first operation section" of the present invention.

The first rotating shaft 11 is a shaft that connects the supply table 3 to the apparatus main body 2 so as to be rotatable around a horizontal axis extending in the left-right direction. The supply table 3 is connected to the apparatus main body 2 via the first rotating shaft 11, and is located at a first upper stage position P1 where the upper stage conveyor 5 and each other's transport path are connected, and at a first upper stage position P1 where the guide conveyor 7 and each other's transport path are connected. 1 and the lower position P2 in the height direction.

The first biasing section 12 is bridged between the supply table 3 and the apparatus main body 2. The first biasing section 12 is composed of a winding device that winds the wire using a spring biasing force, and is configured to constantly apply a spring biasing force in the upward rotation direction to the supply table 3 . Due to the spring biasing force, the supply table 3 is always held at the first upper stage position P1 connected to the upper stage conveyor 5 before the first foot pedal 13 is depressed.

The first foot pedal 13 is connected to the lower right portion of the supply side (front side) of the apparatus main body 2 in the drawing by a first pedal shaft 13A extending in the front-rear direction so that it can be rotated by pressing the foot pedal. The first elevating section 14 is connected to the lower right portion of the supply side (front side) of the main body 2 of the apparatus in the figure so as to be able to move up and down only in the vertical direction. The first elevating part 14 has a lower part connected to the first foot pedal 13 and an upper part connected to the supply table 3.

As a result, the first elevating section 14 is always held at the lower position of the apparatus main body 2 by the force that holds the supply table 3 at the first upper position P1 before the first foot pedal 13 is depressed. It is said that As shown in FIG. 14, the first elevating section 14 is pushed upward along the device main body 2 when the first foot pedal 13 is depressed by the operator. Thereby, the first elevating section 14 pushes the portion of the supply table 3 on the front side of the first rotating shaft 11 upward, and pushes the supply table 3 down to the first lower position P2.

The first elevating section 14 is locked by the first locking section 15 provided on the device main body 2 at the above-mentioned pushed up position. Thereby, the supply table 3 is held in a depressed state at the first lower position P2. The first lock portion 15 is composed of a housing 15A attached to the device main body 2 and a lock claw 15B attached to the housing 15A. The first lock portion 15 is configured such that a lock claw 15B projects from the side on the vertical locus of the first lifting portion 14.

In the first locking part 15, when the first elevating part 14 is pushed up from below, the lock claw 15B avoids contact with the first elevating part 14 by rotating upward about the front-rear direction. Then, when the first lifting part 14 moves upwardly over the lock claw 15B, the lock claw 15B comes out of contact with the first lifting part 14 and returns to the initial position, and the first lifting part 15 returns to the initial position. 14 from below. Thereby, the first locking section 15 enters a locked state in which the lowering of the first elevating section 14 is restricted.

As shown in FIG. 15, in the first lock portion 15, when a release cable 15C connected to the housing 15A is operated, a link (not shown) supporting the housing 15A is bent, and the housing 15A is moved to the right in the figure. and is dismissed. As a result, the lock claw 15B attached to the housing 15A is removed from contact with the first elevating section 14, and the first elevating section 14 is released from the locked state. The release cable 15C is a member that is pushed and pulled by the slider 32 when the slider 32 slides to the end position of the seesaw rail 31, as will be described in detail later with reference to FIG.

As shown in FIG. 12, the first foot pedal 13 is normally locked from being depressed by an operation locking section 16 provided on the left side of the supply side (front side) of the device main body 2 in the figure. Ru. As shown in FIG. 5, the first foot pedal 13 is in the locked state when the trigger 17 provided on the upper conveyor 5 is pushed by the movement of the pallet PA carrying the work W on the upper conveyor 5. It will be canceled accordingly.

Specifically, as shown in FIG. 16, the operation lock section 16 includes a lock pipe 16A, a release holding plate 16B, and a tension spring 16C. The lock pipe 16A is made of a cylindrical member extending in the front-rear direction, and is connected to the device main body 2 so as to be slidable only in the front-rear direction. The release holding plate 16B is made of a flat member extending in the left-right direction, and is connected to the device main body 2 so as to be rotatable around an axis extending in the front-rear direction.

The release holding plate 16B is normally held with its flat plate portion dropped onto the lock pipe 16A due to the action of gravity. The tension spring 16C is bridged between the lock pipe 16A and the device main body 2, and is configured to constantly apply a spring biasing force to the lock pipe 16A in the direction of drawing it rearward.

Due to the spring biasing force described above, the lock pipe 16A is normally held in a rearwardly drawn position with respect to the device main body 2. In the rearwardly drawn state, the lock pipe 16A protrudes so as to hit a portion of the supply stand 3 from below. Therefore, in the above state, even if the supply table 3 is pushed down by pressing the first foot pedal 13, it will be restricted by the contact with the lock pipe 16A. Thereby, the depression operation of the first foot pedal 13 is restricted.

As shown in FIG. 17, the lock pipe 16A moves forward against the spring biasing force of a tension spring 16C when a cable (not shown) connected to the lock pipe 16A is operated. I'm drawn into it. As a result, the release holding plate 16B is dropped by the action of gravity into a concave stepped portion 16A1 formed at the middle portion of the lock pipe 16A in the front-rear direction. As a result, the lock pipe 16A is locked in the forwardly retracted position.

In the state in which the lock pipe 16A is pulled forward as described above, the lock pipe 16A is in a state in which it does not inhibit the movement of the supply table 3 due to the depression operation of the first foot pedal 13. That is, the first foot pedal 13 is unlocked. Therefore, as shown in FIG. 18, by depressing the first foot pedal 13, the supply stand 3 can be pushed down to the first lower position P2.

The state in which the lock pipe 16A is held in position by the release holding plate 16B is released by an operation in which the supply table 3 is pulled up from the depressed position, as shown in FIG. Specifically, when the supply table 3 is pulled up from the depressed position, the release operation rod 18 provided on the supply table 3 and extending in the vertical direction abuts against the release holding plate 16B from below, and the release holding plate 16B is pushed up. Pull the lock pipe 16A upward away from the stepped portion 16A1. As a result, the lock pipe 16A is pulled rearward again by the spring biasing force of the tension spring 16C, and the downward movement of the supply table 3 is returned to the state where it is restricted.

The lower end of the release operation rod 18 is rotatably connected to the supply table 3 by a support shaft 18A extending in the front-rear direction. The release operation rod 18 is normally maintained in an upright position with respect to the supply table 3 due to the biasing force of a spring (not shown) spanned between the release operation rod 18 and the supply table 3 .

As shown in FIG. 18, the release operation rod 18 is arranged so as to be brought into contact with the release holding plate 16B from the front when the supply table 3 is pushed down. However, the release operation rod 18 is adapted to slip into a position directly below the release holding plate 16B while escaping the contact with the release holding plate 16B by forward rotation around the support shaft 18A. As a result, as shown in FIG. 19, the release operation rod 18 is abutted against the release holding plate 16B from below by the movement of the supply table 3 being pulled up from the depressed position, and pushes the release holding plate 16B upward. It has become.

By the way, the other end of the cable (not shown) that pulls the lock pipe 16A forward is connected to the trigger 17 shown in FIG. 12. Thereby, as shown in FIG. 5, the above-mentioned cable (not shown) is pulled by the trigger 17 when the pallet PA carrying the work W flows over the upper conveyor 5 and the trigger 17 is pushed. It has become. The trigger 17 is rotatably connected to the device main body 2 by a trigger shaft 17A extending in the left-right direction.

The trigger 17 is normally maintained in an upright position above the upper conveyor 5 by the biasing force of a spring (not shown) that is bridged between the trigger 17 and the main body 2 of the apparatus. The trigger 17 is pushed by the pallet PA carrying the workpieces W as it flows over the upper conveyor 5, and is thrown backward. Thereby, the trigger 17 pulls a cable (not shown).

Further, as shown in FIG. 12, a release operation part 19 in the shape of a round bar extending in the vertical direction is provided on the left side of the supply side (front side) of the apparatus main body 2 in the drawing. The release operation section 19 is an emergency operation member that allows a worker standing on the supply side to remotely operate the trigger 17 when desired. Specifically, the release operation section 19 is connected to a cable (not shown) that connects the trigger 17 described above and the lock pipe 16A. When the operator pulls the release operation section 19 forward, the lock pipe 16A is pulled forward in the same way as when the trigger 17 is pushed as described above with reference to FIG. There is.

As shown in FIG. 12, the release operation section 19 is rotatably connected at its lower end to the device main body 2 by a release operation shaft 19A extending in the left-right direction. The release operation section 19 is normally held in an upwardly erect position by the biasing force of a spring (not shown) that is bridged between the release operation section 19 and the main body 2 of the device. When the operator operates the release operation section 19 to pull it forward, the release operation section 19 pulls a cable (not shown) and pulls the lock pipe 16A described above with reference to FIG. 19 forward.

By providing the release operation section 19, as shown in FIG. In irregular cases, such as when the operator wants to start pouring from a location, the first foot pedal 13 can be easily unlocked by the operator simply operating the release operation section 19.

Referring to FIG. 1, a slide stopper 34 of a pushing mechanism 30 shown in FIG. 20 is connected to the first elevating section 14 described above via a cable (not shown). The slide stopper 34 is made of a round bar-shaped member that extends in the vertical direction. The slide stopper 34 is rotatably connected at its upper end to the device main body 2 by a stopper shaft 34A extending in the front-rear direction. The slide stopper 34 is normally held in a hanging state due to the action of gravity.

The slide stopper 34 is pulled to the right side in the figure via a cable (not shown) as shown in FIG. be manipulated in such a way as to be manipulated. Thereby, the slide stopper 34 releases the locked state of the slider 32, which will be described later.

(About the configuration of the second switching mechanism 20)
Next, the configuration of the second switching mechanism 20 will be explained in detail. As shown in FIGS. 22 and 23, the second switching mechanism 20 includes a second rotating shaft 21, a second urging section 22, a second foot pedal 23, a pair of left and right second elevating sections 24, and a support. 25 and a dam stopper 26. Here, the second rotating shaft 21 corresponds to the "horizontal axis" of the present invention, and the second foot pedal 23 corresponds to the "second operating section" of the present invention.

The second rotating shaft 21 is a shaft that connects the receiving table 4 to the apparatus main body 2 so as to be rotatable around a horizontal axis extending in the left-right direction. The receiving table 4 is connected to the apparatus main body 2 via the second rotating shaft 21, so that the receiving table 4 is located at a second upper stage position Q1 where the upper stage conveyor 5 and each other's conveyance path are connected, and at a second stage position Q1 where the mutual conveyance path is connected to the lower stage conveyor 6. 2 and the lower position Q2 in the height direction.

The second biasing section 22 is bridged between the receiving table 4 and the device main body 2. The second biasing section 22 is composed of a weight and a spring (not shown) suspended between the receiving table 4 and the main body 2 of the device via a cable (not shown), and is constantly rotated upward relative to the receiving table 4. It is configured to apply a biasing force in the direction. Due to the biasing force, the receiving table 4 is always held at the second upper stage position Q1 connected to the upper stage conveyor 5 before the second foot pedal 23 is depressed.

The second foot pedal 23 is connected to the lower center of the receiving side (rear side) of the device body 2 in the drawing by a second pedal shaft 23A extending in the left-right direction so that it can be rotated by pressing the foot pedal. The receiving stand 4 is connected to the second foot pedal 23 via an unillustrated connecting mechanism so as to be interlocked with the rotational movement caused by pressing the foot pedal. With the above configuration, as shown in FIG. 24, when the second foot pedal 23 is depressed by the operator, the receiving table 4 is pulled downward around the second rotating shaft 21 via a cable (not shown). It is switched to the second lower stage position Q2 connected to the lower stage conveyor 6.

As shown in FIGS. 22 and 23, the pair of left and right second elevating portions 24 are each assembled into a frame shape when viewed from the side. Each of the second elevating parts 24 is connected to both left and right sides of the receiving side (rear side) of the apparatus main body 2 so as to be able to move up and down only in the vertical direction. Each second elevating section 24 is connected to the second foot pedal 23 via a cable (not shown).

As a result, each of the second elevating parts 24 is always held at a lower position on both left and right sides of the device main body 2 by the action of gravity before the second foot pedal 23 is depressed. In this state, the work lifting parts 24A of each of the second elevating parts 24, which are provided at their upper edges and extend in the shape of a vertical plate in the front-rear direction, are at a position lower than the upper surface of the receiving table 4 (the upper surface of the roller conveyor). It is considered to be in a certain state.

As shown in FIG. 24, each of the second elevating parts 24 moves upwardly along both left and right sides of the apparatus main body 2 via a cable (not shown) when the second foot pedal 23 is depressed by the operator. be lifted up. Thereby, the workpiece lifting parts 24A at the upper edges of each of the second elevating parts 24 are pulled up to a position higher than the upper surface of the receiving table 4 (the upper surface of the roller conveyor). As a result of the above-mentioned lifting, each second elevating section 24 can move only the pallet PA, leaving the work W, even if the second foot pedal 23 is operated with the work W left on the pallet PA on the upper surface of the receiving table 4. It is now possible to flow downstream.

Then, each of the second elevating parts 24 is in a state of being supported from below by each of the supporting parts 25 provided on both left and right sides of the apparatus main body 2 at each of the above-mentioned raised positions. Thereby, each second elevating section 24 can appropriately lift and hold the workpiece W from the pallet PA. Each support portion 25 has the same structure as the first lock portion 15 described above with reference to FIGS. 14 and 15.

That is, as shown in FIG. 24, when each second elevating portion 24 is pulled up from below by operating the second foot pedal 23, each support portion 25 rotates to prevent contact with each second elevating portion 24. Dodge. Then, each of the supporting parts 25 becomes in a state of supporting each of the second elevating parts 24 from below as each of the second elevating parts 24 passes over them. In addition, each support part 25 releases the supporting state of each second elevating part 24 when the operation of the second foot pedal 23 is returned, and allows each second elevating part 24 to fall to the initial position by its own weight. It has become.

The dam stopper 26 is rotatably connected to a region downstream of the upper conveyor 5 in the apparatus main body 2 (a region upstream of the receiving table 4) around a dam shaft 26A extending in the left-right direction. As shown in FIG. 23, the dam stopper 26 is always at a position lower than the upper surface of the upper conveyor 5 (the upper surface of the roller conveyor) before the second foot pedal 23 is depressed.

As shown in FIG. 24, when the second foot pedal 23 is depressed, the dam stopper 26 is pulled up to a position higher than the upper surface of the upper conveyor 5 via a cable (not shown). As a result, when the second foot pedal 23 is depressed, that is, when the receiving table 4 is dropped to the second lower position Q2 connected to the lower conveyor 6, the dam stopper 26 stops the next workpiece on the upper conveyor 5. Even if the pallet PA loaded with W is washed away, it can be stopped at a position upstream of the receiving table 4.

(About the configuration of the pushing mechanism 30)
Next, the configuration of the pushing mechanism 30 will be explained in detail. As shown in FIG. 3, the pushing mechanism 30 includes a seesaw rail 31, a slider 32, a seesaw lock portion 33, and a slide stopper 34.

The seesaw rail 31 is provided at a lower position than the lower conveyor 6 of the apparatus main body 2, as shown in FIGS. 22 and 23. The seesaw rail 31 is configured to include a pair of left and right rails that are elongated in the front-rear direction. The seesaw rail 31 is rotatably connected to the apparatus main body 2 at an intermediate portion thereof in the longitudinal direction by a seesaw shaft 31A extending in the left-right direction. Further, a portion of the seesaw rail 31 on the rear side of the seesaw shaft 31A is connected to a portion of the second foot pedal 23 on the front side of the second pedal shaft 23A by a connecting portion 31B.

Before the second foot pedal 23 is depressed, the seesaw rail 31 is always tilted backwards around the seesaw shaft 31A due to the biasing force of a spring (not shown) that is bridged between the seesaw rail 31 and the device main body 2. It is assumed that the position is maintained in the posture. As shown in FIG. 24, the seesaw rail 31 is tilted forward and downward around the seesaw shaft 31A by being pushed up by the second foot pedal 23 when the second foot pedal 23 is depressed by the operator. can be switched to

As the seesaw rail 31 is tilted forward downward, the front end portion 31C shown in FIG. Hung and locked. Specifically, the seesaw lock section 33 is configured as follows.

That is, first, the seesaw rail 31 is configured such that its front end portion 31C is connected to the main body portion 31D so as to be able to slide only in the front-back direction. A tension spring 33B is spanned between the front end portion 31C and the main body portion 31D of the seesaw rail 31. With the above configuration, as shown in FIG. 25, when the seesaw rail 31 is always in an upwardly inclined position, its front end portion 31C is held in a state drawn backward by the biasing force of the tension spring 33B. It looks like this.

As shown in FIG. 26, the seesaw rail 31 is tilted forward so that the front end portion 31C hits a hook portion 33C (pulley) provided on the device main body 2 from above, and Pushed forward by force. When the seesaw rail 31 further slopes forward downward and its front end portion 31C passes over the hooking portion 33C (pulley) downward, the front end portion 31C is pulled rearward by the biasing force of the tension spring 33B. It is in a locked state where it slips under the hook part 33C (pulley).

As a result, the seesaw rail 31 is locked in the forward-downwardly inclined position. In the above locked state, as shown in FIG. 29, the sliding body 32A of the slider 32, which will be described later, slides forward on the seesaw rail 31, and the pressure receiving rod 33A provided at the front end portion 31C is moved forward by the sliding body 32A. It is released by being pushed into. Specifically, the pressure-receiving rod 33A is pushed forward by the sliding body 32A, so that the front end portion 31C is removed forward from the state in which it has slipped under the hook portion 33C (pulley). As a result, the seesaw rail 31 is returned to the upwardly tilted position again, as shown in FIG. 30.

As shown in FIGS. 22 and 23, the slider 32 includes a sliding body 32A and a pushing body 32B that are individually connected so that the seesaw rail 31 can only slide in the longitudinal direction with respect to the seesaw rail 31. . The sliding body 32A is provided at the rear of the pushing body 32B, and is configured to slide in the inclination direction (back and forth direction) of the seesaw rail 31 due to its own weight. The sliding body 32A is always located at the rear end of the movable region of the seesaw rail 31 because the seesaw rail 31 is held in a tilted position downward backwards before the second foot pedal 23 is depressed. state.

As shown in FIG. 24, the sliding body 32A is configured to slide forward under its own weight when the second foot pedal 23 is depressed by the worker and the seesaw rail 31 is switched to a forward-downward inclined position. can be switched to an activated state. At this time, if the slide stopper 34 described above in FIGS. 20 and 21 is unlocked by operating the first foot pedal 13, the sliding body 32A slides in the forward and downward direction along the seesaw rail 31 due to its own weight. do.

However, when the slide stopper 34 described above in FIG. 20 is not unlocked, the sliding body 32A is restricted from sliding in the forward and downward direction due to contact with the slide stopper 34. Therefore, in that case, even if the seesaw rail 31 is switched to the forward-downwardly inclined position, the sliding body 32A is maintained at the rear end of the seesaw rail 31. However, when the first foot pedal 13 is operated thereafter, the sliding body 32A becomes in a state where it can slide in the forward and downward direction due to its own weight.

As shown in FIG. 27, the sliding body 32A slides in the forward downward direction along the seesaw rail 31 which is inclined forward downward, so that the sliding body 32A hits the pushing body 32B from behind and pushes the pushing body 32B forward. Push. Further, the sliding body 32A presses pressing rods 32A1 erected on both left and right sides of the sliding body 32A from behind against the pallets PA stocked on the lower conveyor 6. Then, the sliding body 32A pushes the pallet PA onto the guide conveyor 7 by the pressing rod 32A1 by further sliding forward.

As shown in FIG. 27, the pushing body 32B slides forward and downward together with the sliding body 32A by being pushed from the rear side by the sliding body 32A, and has telescopic rods erected on both left and right sides thereof. 32B1 is pressed from behind against the pallet PA that was previously pushed to an intermediate position by the pressing rod 32A1 of the sliding body 32A. Then, by further sliding forward, the pushing body 32B pushes the pallet PA onto the guide conveyor 7 by the telescopic rod 32B1 while extending the telescopic rod 32B1 upward, as shown in FIG. and lift it onto the supply table 3.

Here, as shown in FIG. 24, the pushing body 32B has a structure in which telescopic rods 32B1 on both left and right sides thereof and the device main body 2 are connected via a cable (not shown). The telescopic rod 32B1 is connected to the pushing body 32B so that it can only slide in the vertical direction. A spring (not shown) is interposed in the wiring path of the cable connecting the telescopic rod 32B1 and the main body 2 of the device, which applies a biasing force to the cable in the pulling operation direction.

The telescopic rod 32B1 is biased by the above-mentioned spring (not shown) so as to be drawn downward with the action of gravity against the pushing body 32B. The above-mentioned spring (not shown) applies a force to draw the pushing body 32B backward toward the initial position in the device main body 2 after the telescopic rod 32B1 has been drawn downward. Thereby, regardless of the inclination of the seesaw rail 31, the pushing body 32B is always held at an intermediate portion of the seesaw rail 31 in the front-rear direction before being pressed from behind by the slider 32.

As shown in FIG. 24, the pushing body 32B is configured such that when the second foot pedal 23 is depressed by the operator, the seesaw rail 31 is tilted forward and downward, and the slider 32 is thereby slid forward. 32 and is pushed forward. As a result, as shown in FIG. 27, the pushing body 32B is pushed forward and extends the telescopic rod 32B1 upward by operating a cable (not shown), thereby stocking the telescopic rod 32B1 on the lower conveyor 6. Press it against the pallet PA from behind.

Then, by further sliding forward, the pushing body 32B pushes the pallet PA from above the lower conveyor 6 to above the guide conveyor 7 and rides on the supply table 3, as shown in FIG. . After the above-mentioned pushing, as shown in FIG. 29, the sliding body 32A is pushed into the pressure receiving rod 33A provided at the front end portion 31C of the seesaw rail 31, thereby unlocking the seesaw rail 31. Further, at this time, the sliding body 32A is also pushed into the release cable 15C provided on the device main body 2, and pulls the release cable 15C.

By pulling the release cable 15C, the lock of the first elevating part 14 by the first locking part 15 described above with reference to FIG. 15 is also released. Therefore, as shown in FIG. 30, the seesaw rail 31 is returned to the downwardly inclined position, the supply table 3 is returned to the first upper position P1, and the pallet PA is returned onto the supply table 3. The state will be as follows. In addition, by returning the seesaw rail 31 to the backwardly inclined position, the sliding body 32A and the pushing body 32B that constitute the slider 32 are returned to their initial positions.

Further, the second foot pedal 23 described above with reference to FIG. 24 is also returned to the initial state before being depressed, as shown in FIG. 23. As a result, the receiving table 4 is returned to the second upper stage position Q1, and each second elevating section 24 is also returned to the lowered state. Further, the dam stopper 26 is also returned to the lowered state. Furthermore, as shown in FIGS. 12 and 13, the first foot pedal 13 is also returned to its initial state before being depressed.

Furthermore, the operation locking section 16 described above with reference to FIG. 17 is unlocked by the operation of returning the supply table 3 to the first upper stage position P1. Therefore, the first foot pedal 13 is returned to the locked state again. That is, the conveying device 1 is returned to the initial state in which the pallet PA is set on the supply table 3 described above in FIG. 4.

Note that the number of pallets PA stocked on the lower conveyor 6 described above in FIG. 10 and the number of pallets PA dammed by the dam stopper 26 described above in FIG. 24 are not particularly limited. Depending on the length of the lower conveyor 6 and the upper conveyor 5, two or more sheets may be stocked or dammed.

(summary)
To summarize the above, the transport device 1 according to the present embodiment has the following configuration. Note that the reference numerals given in parentheses below are the reference numerals corresponding to the respective configurations shown in the above embodiments.

That is, the conveyance device (1) includes a downwardly sloped upper stage conveyor (5) that allows the conveyed object (PA) to flow from the upstream supply stage (3) onto the downstream side receiving stage (4) by its own weight, and the upper stage. It has a downwardly sloped lower conveyor (6) which is provided below the conveyor (5) and allows the conveyed article (PA) supplied onto the receiving table (4) to flow in a folded manner under its own weight. This conveyance device (1) includes a first switching mechanism (10), a second switching mechanism (20), and a pushing mechanism (30).

The first switching mechanism (10) rotates the supply table (3) around the horizontal axis (11) to connect the first upper stage position (P1), which is connected to the upper stage conveyor (5), and the lower stage conveyor (6). and the first lower position (P2). The first switching mechanism (10) includes a first biasing part (12) that holds the supply table (3) at the first upper position (P1) by biasing, and a first biasing part (12) that holds the supply table (3) at the first upper position (P1) by the user's operation. It has a first operation part (13) that is dropped into the first lower position (P2), and a first lock part (15) that locks the supply table (3) in the first lower position (P2) by this dropping.

The second switching mechanism (20) rotates the receiving table (4) around the horizontal axis (21) to connect the second upper stage position (Q1), which is connected to the upper stage conveyor (5), and the lower stage conveyor (6). and the second lower stage position (Q2). The second switching mechanism (20) includes a second biasing part (22) that holds the receiving platform (4) at the second upper position (Q1) by biasing, and a second biasing section (22) that maintains the receiving platform (4) at the second upper position (Q1) by the user's operation. 2, a second operation part (23) that is lowered to the lower position (Q2).

The pushing mechanism (30) moves the conveyed article (PA), which has been flown onto the lower conveyor (6) by dropping the receiving table (4), onto the supply table (3) at the first lower position (P2). Let it go up. The pushing mechanism (30) includes a seesaw rail (31) and a slider (32). The seesaw rail (31) is biased to have an upward slope toward the downstream side of the lower conveyor (6), and is switched to a downward slope by operation of the second operating section (23). The slider (32) is provided so as to be able to slide in the inclination direction with respect to the seesaw rail (31), and when the seesaw rail (31) slopes downward, it flows downstream due to its own weight and onto the lower conveyor (6). A certain conveyed object (PA) is pushed onto the supply table (3).

When the slider (32) flows on the downwardly sloped seesaw rail (31) to a predetermined downstream position, the first lock portion (15) is pushed by the slider (32) and released. As a result of this release, the supply table (3) carrying the conveyed object (PA) is returned from the first lower position (P2) to the first upper position (P1) by force.

According to the above configuration, the user can appropriately return and transport the conveyed object (PA) between the supply table (3) and the receiving table (4) by the following procedure. First, a user flows the conveyed object (PA) onto the upper conveyor (5) from above the supply stage (3) on the upstream side, and flows it to the receiving stage (4) on the downstream side. Next, the user operates the first operation section (13) to switch the supply stand (3) to the connection state with the lower conveyor (6). Next, the user operates the second operation part (23) to switch the receiving platform (4) to the connection state with the lower conveyor (6), and connects the receiving platform (4) to the lower conveyor (6). Flow the conveyed object (PA).

By the above operation, the slider (32) flows downstream on the downwardly inclined seesaw rail (31), and connects the conveyed object (PA) on the lower conveyor (6) with the lower conveyor (6). Push it onto the supply table (3). Then, as the slider (32) flows to a predetermined downstream position, the first lock part (15) is unlocked, and the supply platform (3) carrying the conveyed object (PA) is biased toward the upper stage conveyor. The state of connection with (5) is restored. As described above, the conveyed object (PA) can be appropriately turned around and conveyed between the supply table (3) and the receiving table (4) without power.

Further, the pushing mechanism (30) further locks the seesaw rail (31) in the position switched to the downward slope, and the slider (32) flows to a predetermined downstream position, so that the slider ( It has a seesaw lock part (33) which is pushed and unlocked by 32). According to the above configuration, the seesaw rail (31) can be locked in the downward slope state by the user once operating the second operating section (23). Therefore, the slider (32) can be moved downstream without the user continuing to operate the second operation section (23). Moreover, the above lock can be automatically released by the slider (32) flowing to a predetermined downstream position.

Further, the pushing mechanism (30) further blocks the slider (32) at a predetermined upstream position on the seesaw rail (31), and the slide stopper (34) is unblocked by operation of the first operating section (13). ). According to the above configuration, the slider (32) does not flow downstream on the seesaw rail (31) even if the second operation part (23) is operated until after the first operation part (13) is operated. It can be dammed up like this. Therefore, it is possible to prevent a malfunction in which the conveyed object (PA) on the lower conveyor (6) does not climb onto the supply table (3) even if it is pushed out by the slider (32).

Further, the conveying device (1) further transfers the conveyed article (PA) that has flowed onto the lower stage conveyor (6) to the first lower stage position (P2) by flowing it downstream of the slider (32). It has an upward slope guide conveyor (7) that guides the conveyor to ride onto the platform (3). The guide conveyor (7) is configured to stock the conveyed articles (PA) flown onto the lower stage conveyor (6) by applying them to the change in slope. According to the above configuration, the guide conveyor (7) allows the conveyed article (PA) on the lower conveyor (6) to appropriately ride onto the supply table (3). Moreover, the conveyed objects (PA) can be rationally stocked on the lower conveyor (6).

Further, the first switching mechanism (10) further includes an operation locking part (16) that locks the operation of the first operating part (13) by biasing, and a conveyed object (PA) flowing on the upper stage conveyor (5). It has a trigger (17) that is pushed and moved to unlock the operation locking part (16). According to the above configuration, after one transported object (PA) is flown from the supply table (3) to the receiving table (4), the supply table (3) is dropped to the first lower position (P2) and It is possible to prevent the operation order from being disrupted so that one conveyed object (PA) is received from the conveyor (6).

In addition to the trigger (17), the first switching mechanism (10) further includes a manual release operation section (19) that unlocks the operation lock section (16) by a user's operation. According to the above configuration, even when the conveyed object (PA) is used irregularly, such as flowing from the middle, the disruption of the operation order can be corrected by operating the release operation section (19).

In addition, the conveyed object (PA) flowing from above the supply table (3) through the upper conveyor (5) onto the receiving table (4) is a full pallet (PA) on which the workpiece (W) is placed, The conveyed object (PA) is returned from above the receiving table (4) through the lower conveyor (6) onto the supply table (3). PA). According to the above configuration, full pallets (PA) are carried on the upper conveyor (5) and empty pallets (PA) are carried on the lower conveyor (6), which suppresses the overall size of the apparatus. be able to.

《Other embodiments》
Although the embodiment of the present invention has been described above using one embodiment, the present invention can be implemented in various forms shown below in addition to the above embodiment.

1. The conveyance object may be an object other than a pallet, such as a parts box or a workpiece. In addition, the conveyed items are empty pallets and parts boxes that flow from the supply table through the upper conveyor onto the receiving table, and the conveyed items that flow from the receiving table through the lower conveyor and back onto the supply table. However, it may also be configured as a pallet full of fruit or a parts box.

2. The pushing mechanism may be configured without a seesaw lock section. However, in that case, it should be noted that the slider cannot be moved downstream unless the user maintains the operating state of the second operating section. Further, the pushing mechanism may be configured without a slide stopper. However, in that case, the slider starts sliding toward the downstream side when the second operation section is operated, so it is necessary to switch the supply table to the first lower position by operating the first operation section beforehand. It is important to note that there are

3. The seesaw rail may be configured to be held in an upward slope toward the downstream side by its own weight instead of being biased by a spring in a state before the second operation portion is operated.

4. The first switching mechanism may be configured without an operation lock section. However, in that case, it should be noted that unless the user maintains the operating state of the first operating section, the supply table cannot be maintained in the switched state to the first lower position. Further, the first switching mechanism may be configured to release the lock of the operation locking section only by the detection operation of the trigger without including the release operation section.

5. The first operation section and the second operation section may be configured with other operation types such as a rotary operation type or a slide operation type lever or a push button in addition to a foot pedal.

6. The term "connection" between the supply tray and the receiving tray with the upper conveyor or the lower conveyor includes a direct connection or an indirect connection via an intervening member such as a guide conveyor. Therefore, when the supply stand is switched to the first lower stage position, it may be directly connected to the lower stage conveyor without going through the guide conveyor. However, in that case, it is necessary to provide another locking member in order to stock the conveyed items that have been carried on the lower conveyor at an intermediate position.

1 Transport device 2 Device body 3 Supply stand 4 Receiving stand 5 Upper conveyor 6 Lower conveyor 7 Guide conveyor 10 First switching mechanism 11 First rotation axis (horizontal axis)
12 First biasing section 13 First foot pedal (first operation section)
13A 1st pedal shaft 14 1st lifting section 15 1st lock section 15A Housing 15B Lock claw 15C Release cable 16 Operation lock section 16A Lock pipe 16A1 Step section 16B Release holding plate 16C Tension spring 17 Trigger 17A Trigger shaft 18 Release operation rod 18A Support shaft 19 Release operation section 19A Release operation shaft 20 Second switching mechanism 21 Second rotation axis (horizontal axis)
22 Second biasing section 23 Second foot pedal (second operation section)
23A 2nd pedal shaft 24 2nd elevating part 24A Work lifting part 25 Support part 26 Dam stopper 26A Dam stop shaft 30 Pushing mechanism 31 Seesole rail 31A Seeso shaft 31B Connecting part 31C Front end part 31D Main body part 32 Slider 32A Sliding body 32A1 Pressing rod 32B Pushing body 32B1 Telescoping rod 33 Seesole lock portion 33A Pressure receiving rod 33B Tension spring 33C Latching portion 34 Slide stopper 34A Stopper shaft P1 First upper position P2 First lower position Q1 Second upper position Q2 Second lower position PA Pallet (transferred object) )
W work

Claims (7)

A downwardly sloped upper stage conveyor that allows the conveyed objects to flow from the upstream supply stage to the downstream receiving stage by its own weight, and a downwardly sloped upper conveyor that is provided below the upper stage conveyor and turns back the conveyed objects supplied onto the receiving stage by its own weight. A conveying device having a downward slope lower stage conveyor that conveys the flow in a downward slope,
A first switching mechanism that switches the supply table between a first upper position where the supply table is rotated about a horizontal axis and a first lower position where the supply table is connected to the upper conveyor and a first lower position where the supply table is connected with the lower conveyor; a first biasing part that holds the supply table in the first upper position; a first operation part that lowers the supply table into the first lower position by a user's operation; the first switching mechanism having a first lock portion that locks in position;
A second switching mechanism that switches the receiving stand between a second upper stage position where the receiving stand is connected to the upper stage conveyor and a second lower stage position where the receiving stand is connected to the lower stage conveyor by rotating the receiving stand about a horizontal axis, the receiving stand being biased. the second switching mechanism, the second switching mechanism having a second biasing section that holds the receiver at the second upper position; and a second operation section that lowers the receiving stand to the second lower position by a user's operation;
A pushing mechanism for causing a conveyed object, which has been flown onto the lower conveyor by dropping the receiving table, onto the supply table at the first lower position, and is biased toward the downstream side of the lower conveyor. There is a seesaw rail that becomes an uphill slope and switches to a downhill slope by operating the second operation part, and a seesaw rail that is provided so as to be able to slide in the inclination direction and that flows downstream due to its own weight when the seesaw rail becomes a downward slope The pushing mechanism includes a slider that pushes out the conveyed object on the lower conveyor onto the supply table,
When the slider flows to a predetermined downstream position on the seesaw rail having a downward slope, the first lock portion is pushed by the slider and released, and the release causes the supply platform on which the transported object is placed to be biased. a conveying device that is returned from the first lower position to the first upper position by; The conveying device according to claim 1,
The pushing mechanism further locks the seesaw rail in a position switched to a downward slope, and when the slider flows to the predetermined downstream position, it is pushed together with the first locking part by the slider and the lock is released. A transport device with a seesaw lock section. The conveyance device according to claim 1 or claim 2,
The conveying device wherein the pushing mechanism further includes a slide stopper that blocks the slider at a predetermined upstream position on the seesaw rail, and the blocking is released by operation of the first operating section. The conveying device according to any one of claims 1 to 3,
The conveyance device further includes an upstream side that guides the conveyed articles flown onto the lower stage conveyor onto the supply table located at the first lower stage position by the flow toward the downstream side of the slider. Has a slope guide conveyor,
The conveyance device is configured such that the guide conveyor stocks the conveyed articles flown onto the lower conveyor by hitting them at a change in slope. The conveying device according to any one of claims 1 to 4,
The first switching mechanism further includes an operation lock section that locks the operation of the first operation section by biasing, and a trigger that is pushed and moved by the conveyed object flowing on the upper stage conveyor to release the lock of the operation lock section. A conveyance device having. The conveying device according to claim 5,
The first switching mechanism further includes, in addition to the trigger, a manual release operation section that unlocks the operation lock section by a user's operation. The conveying device according to any one of claims 1 to 6,
A conveyed object flowing from above the supply stand through the upper conveyor onto the receiving stand is a pallet full of workpieces, and from above the receiving stand, through the lower conveyor and onto the supply stand. A conveying device in which the conveyed object to be returned is an empty pallet from which the workpieces have been taken out on the receiving table.

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