JP2016196362A - loader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loader capable of operating loads more safely and more easily.SOLUTION: A loader includes: a carriage which has a travel roller and is capable of running along a groove-shaped rail formed on a floor surface; a cargo receiving member which is laid on the carriage and has a lifting inclined cam in a lower part; and a lift drive mechanism which is fixed to one end of the carriage and lifts the cargo receiving member with respect to the carriage. The lift drive mechanism is provided with: a worm gear mechanism for lift drive having a wormshaft for lift drive rotating by rotary drive from outside and a worm gear for lift drive engaged with the wormshaft for lift drive; and a crank mechanism having a rotary wheel linked with the drive gear coaxially fitted to the worm gear for lift drive and a crank arm whose one end is linked with the rotary wheel and whose other end is connected to the cargo receiving member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a loader for moving a load placed on a floor surface of a cargo vehicle such as a truck or a floor of a warehouse, for example, a load loaded on a pallet.

  Loaded into a pair of parallel loader grooves arranged on the loading platform floor of a dedicated cargo vehicle or warehouse, etc., and loaded on the loading platform to move the cargo on the loading platform floor to a predetermined position through the lifting and lowering operation of the loading section (loading section) Therefore, a loader used for loading and unloading a load from a storage position and carrying it outside is known (for example, see Patent Document 1).

  The loader described in Patent Document 1 includes a loader main body and an operating device, and the loader main body includes a lower-side roller frame, an upper-side loader base, and a roller frame. And a base guide disposed between the loader base and the loader base. The loader body can travel on a rail provided in a loading platform floor of a vehicle or the like in a state where a load is loaded on the upper surface (load receiving state) and can move to a load storage position. The actuating device includes an actuating device main body for moving up and down a loader base arranged on the rear end side of the loader base, and an operating rod for operating the actuating device.

  This type of loader is operated as follows. When moving a load placed on a floor surface in a cargo vehicle or a warehouse, a pair of loader bodies are inserted into a pair of loader rail grooves installed under the load. Further, when the pair of loader bodies are stored in advance in the pair of loader rail grooves, the load is placed on the rail grooves where the pair of loader bodies are present. Next, the insertion portions of the pair of operation rods (operation rods) are respectively inserted into the operation holes of the operating body of the loader operating device, and when the pair of operation rods are tilted rearward with the gear shaft as a fulcrum, the loader base And the base guide is pulled backward, and the load receiving part gradually rises from the floor surface of the loading platform floor. As a result, the load loaded on the load receiving portion is pushed up and leaves the floor. Next, the loader main body is moved forward on the rail like a wheelbarrow while the load receiving state where both the operating rods are tilted by a predetermined angle is moved to the storage position. When these operating rods are raised to the front side and returned to the vertical state, the cargo receiving portion descends and finally fits in the rail groove. Thereafter, holding both operating rods in the vertical state, the loader body is moved backward along the rail, and both operating rods are removed from the loader body.

JP-A-2005-154126

  The conventional loader as described in Patent Document 1 uses the operation rod to move the load receiving portion (loader base) up and down with respect to the roller frame, so that the operation rod rebounds due to the load of the load during the operation. There was a risk of hitting and injury.

  In addition, since the load is moved by pushing the operating rod forward, in the case of a heavy load (for example, 500 kg to 1000 kg), a considerable pressing force is required, which may make the operation difficult.

  The present invention has been made based on such a problem, and an object of the present invention is to provide a loader that can be operated more safely and easily.

  According to the present invention, the loader has a traveling roller and is capable of traveling along a grooved rail formed on the floor surface, and a load receiver mounted on the carriage and having a lifting cam at the bottom. A member, and an elevating drive mechanism that is fixed to one end of the carriage and raises and lowers the cargo receiving member with respect to the carriage. The elevating drive mechanism is coaxially mounted to the elevating drive worm gear having an elevating drive worm shaft rotating by an external rotational drive and an elevating drive worm gear meshing with the elevating drive worm shaft. And a crank mechanism having a crank arm having one end linked to the rotation wheel and the other end connected to the load receiving member.

  By using a lifting drive worm gear mechanism that is operated by rotation of an input rotating shaft that is driven to rotate from the outside, and a crank mechanism, the carriage can be moved up and down by rotational driving of the input rotating shaft from the outside. Done. That is, unlike the prior art, it is not configured to raise and lower the carriage by tilting the operating rod backward or raising it forward, so that the raising and lowering operation can be performed more safely and more easily. Further, since the elevating drive mechanism employs a crank mechanism, transmission of force applied in the reverse direction from the lifting portion side of the load receiving member is blocked by this crank mechanism. For this reason, the load receiving member is automatically locked at the raised position and does not descend, thereby improving safety.

  It is preferable that the insertion portion further includes an operation rod that can be fitted to the lifting drive worm shaft, and the operation rod has a rotation driving means for rotating the insertion portion.

  In this case, it is preferable that the rotation driving means is an electric rotation driving means having a motor for rotating the insertion portion and a battery for driving the motor.

  It is also preferable that the rotation driving means is manual rotation driving means for manually rotating the insertion portion.

  In this case, the manual rotation driving means is connected to the automatic screw transmission mechanism in which the pressing force is changed to the rotational force, the rod-like support member arranged in parallel to the automatic screw transmission mechanism, and the slider of the automatic screw transmission mechanism, and the rod-like support It is more preferable to provide a tread plate that can move up and down using the member as a guide.

  The traveling drive mechanism further includes a traveling drive mechanism for traveling the carriage along the groove-shaped rail. The traveling drive mechanism includes a traveling drive worm shaft, a traveling drive worm gear that meshes with the traveling drive worm shaft, and a traveling drive It is also preferable that the driving roller is coaxially mounted on the worm gear. Thereby, a load such as a pallet can be moved using a motor or the like, and automation and labor saving can be realized.

  It is also preferable that the insertion portion of the aforementioned operating rod can be fitted into the travel drive worm shaft.

  There is an insertion portion that can be fitted to the lifting drive worm shaft, and has a first rotation driving means configured to rotate the insertion portion, and an insertion portion that can be fitted to the traveling drive worm shaft. It is also preferable to include a second rotation driving unit configured to rotate the insertion portion.

  It is also preferable that each of the first rotation driving unit and the second rotation driving unit is an electric rotation driving unit having a motor for rotating the insertion portion and a battery for driving the motor.

  It is also preferable to further include a remote controller for operating the first rotation driving means and / or the second rotation driving means.

  According to the present invention, the loader is not configured to raise and lower the carriage by tilting the operating rod backward or raising it forward as in the prior art, but by raising and lowering the carriage by rotating the input rotary shaft from the outside. Therefore, the raising / lowering operation can be performed more safely and more easily. Further, since the elevating drive mechanism employs a crank mechanism, transmission of force applied in the reverse direction from the lifting link member side is blocked by this crank mechanism. For this reason, the load receiving member is automatically locked at the raised position and does not descend, thereby improving safety.

It is a perspective view which shows the external appearance structure of 1st Embodiment of the loader of this invention. It is a side view which decomposes | disassembles and shows the internal structure of the loader of FIG. It is side surface sectional drawing which shows the structure and operation | movement of the raising / lowering drive mechanism part of the loader of FIG. 1 in detail. It is a perspective view which shows the external appearance structure of 2nd Embodiment of the loader of this invention. It is a perspective view which shows the external appearance structure of 3rd Embodiment of the loader of this invention. It is a side view which decomposes | disassembles and shows the internal structure of the loader of FIG. It is a top view which shows the structure of the raising / lowering drive mechanism part of the loader of FIG. It is side surface sectional drawing which shows the structure and operation | movement of the raising / lowering drive mechanism part of the loader of FIG. 5 in detail. It is a perspective view which shows the external appearance structure of 4th Embodiment of the loader of this invention. It is a perspective view which shows the external appearance structure of 5th Embodiment of the loader of this invention. It is a side view which decomposes | disassembles and shows the internal structure of 6th Embodiment of the loader of this invention. It is a top view which shows the structure of the raising / lowering drive mechanism part of the loader of FIG.

  Hereinafter, embodiments of the loader according to the present invention will be described. FIG. 1 schematically shows an external configuration of a loader according to a first embodiment of the present invention, FIG. 2 shows an exploded internal configuration of the loader, and FIG. 3 shows a lift drive mechanism portion of the loader. The configuration and operation of the are shown in detail. This 1st Embodiment is related with the pallet loader which handles a pallet as a load, and has the structure which performs the raising / lowering operation | movement of the trolley | bogie electrically.

  As shown in these drawings, the pallet loader 100 according to the present embodiment includes a traveling roller 11 and a carriage 10 that can travel along a rail R laid in a groove formed in a floor surface F. A load receiving member 20 mounted on the carriage 10 and having an inclined cam 21 for raising and lowering, a lifting drive mechanism 30 fixed to one end of the carriage 10 to raise and lower the load receiving member 20 with respect to the carriage 10, and a rotation driving means. And an electric operation rod 50A.

  The carriage 10 is a member that is formed by sheet metal processing a stainless steel plate and has a U-shaped cross section that includes a bottom surface 10a and both side walls 10b. A plurality of openings 10c for arranging the traveling rollers 11 are formed on the bottom surface 10a. The shaft 11a of the traveling roller 11 is inserted through the side walls 10b. Each traveling roller 11 is rotatably supported with respect to this shaft 11a. The carriage 10 can travel along a rail R (see FIG. 3) laid in a loader groove formed on the floor surface F. In order to reduce the weight, a plurality of openings are provided in addition to the position where the traveling roller 11 is disposed on the bottom surface 10a.

  The load receiving member 20 is a member formed by sheet metal processing a stainless steel plate and having a U-shaped cross section composed of an upper surface 20a and both side walls 20b. A lifting cam 21 is formed at the lower end of both side walls 20b. The cargo receiving member 20 is mounted on the carriage 10 and supported by the ends of the plurality of shafts 11 a of the plurality of traveling rollers 11. When the load receiving member 20 is in the lowered position, the end of each shaft 11a is fitted into the arcuate upper end portion 21a of the lifting cam 21. On the other hand, when the load receiving member 20 is in the raised position, The end portion of the shaft 11a is in contact with the substantially horizontal lower end portion 21b of the lifting cam 21. A connecting pin 22 is provided between the side walls 20b. Moreover, it has the standing part 23 formed by bending upward at one end (rear end) of the cargo receiving member 20. Further, on the upper surface 20a of the cargo receiving member 20, there is provided a positioning member 24 (see FIG. 1) that can be raised and stored at a predetermined distance from the rising portion 23. The standing member 23 or the positioning member 24 can be used for positioning by inserting the cargo receiving member 20 into the lower part of the pallet G in accordance with the size of the pallet G (see FIG. 3). A pull-up connecting portion 25 is provided below the raised portion 23, and the pull-up connecting portion 25 is connected to a crank arm 37 of the lifting drive mechanism 30.

  The elevating drive mechanism 30 includes an elevating drive worm gear 31 formed by engaging an elevating drive worm shaft 31a serving as an input rotation shaft and an elevating drive worm gear 31b engaged with the elevating drive worm shaft 31a. A pair of driving gears 33a and 33b fixed to both ends of the worm gear 31b, a pair of intermediate gears 34a and 34b meshing with the driving gears 33a and 33b, respectively, and a pair meshing with the intermediate gears 34a and 34b, respectively. Driven gears 35a and 35b, a pair of crank wheels (rotating wheels) 36a and 36b fixed to the inside of the driven gears 35a and 35b, and one end rotating around a shaft provided between the crank wheels 36a and 36b. Crank arm 3 that is pivotally supported and has the other end connected to pull-up connecting portion 25 And a crank mechanism 38 comprising a. A hexagonal hole 32 into which the insertion portion 54 of the electric operation rod 50A is fitted is provided at the upper end of the input rotation shaft coaxial with the lifting drive worm shaft 31a. In the lifting drive worm gear mechanism 31, when the lifting drive worm shaft 31a on the input rotating shaft side rotates, the lifting drive worm gear 31b engaged therewith also rotates. As a result, the intermediate gears 34 a and 34 b, the driven gears 35 a and 35 b, and the crank wheels 36 a and 36 b also rotate, and the load receiving member 20 can be moved in the front-rear direction via the crank arm 37. The load receiving member 20 moves in the front-rear direction, and the load receiving member 20 is moved in the up-down direction by the lift cam 21.

  The electric operation rod 50 </ b> A is inserted into the motor 51, the battery 52 for driving the motor 51, the operation switch 53, and the hexagonal hole 32 of the elevating drive mechanism 30, and used as an input rotation shaft of the elevating drive worm gear mechanism 31. And an insertion portion 54 to be connected. By inserting the insertion portion 54 into the hexagonal hole 32 and operating the operation switch 53 in a state where the insertion portion 54 is connected to the input rotation shaft to rotate the motor 51, the lifting / lowering worm gear mechanism 31 rotates.

  FIG. 3A shows a state in which the pallet loader 100 is inserted below the pallet G on the rail R laid in the loader groove formed on the floor surface F, and FIG. A state in which the pallet G is lifted to a position higher than the floor surface F by the pallet loader 100 is shown.

  As shown in FIG. 3A, when the pallet loader 100 is inserted into the lower part of the pallet G along the rail R formed on the floor F, the pallet loader 100 is already installed on the rail R on which the pallet loader 100 is already installed. When loading G, since the load receiving member 20 is in the lowered position and the surface 20a of the load receiving member 20 is lower than the floor surface F, the pallet loader 100 does not contact the pallet G. Therefore, the pallet loader 100 can be smoothly inserted or pulled out. Moreover, when inserting the pallet loader 100, the insertion position is inserted to the position which contacts the raising part 23 according to the magnitude | size of the pallet G, for example. Next, the electric operation rod 50A is mounted. In this case, the insertion portion 54 of the electric operation rod 50 </ b> A is inserted into the hexagonal hole 32. The above operation is similarly performed for the pair of pallet loaders 100.

  Thereafter, the following operations are simultaneously performed on the pair of pallet loaders 100. First, the elevation drive mechanism 30 is operated by operating the operation switch 53 of the electric operation rod 50 </ b> A to rotate the motor 51 to rotate (forward rotation) the insertion portion 54. That is, as shown in FIG. 3B, the cargo receiving member 20 moves rearward (upward / downward drive mechanism 30 side) via the crank arm 37. Since the cargo receiving member 20 moves rearward and moves upward by the lifting cam 21, the pallet G is lifted to a position higher than the floor surface F.

  In this state, the pair of electric operating rods 50A or pallet G is manually pushed to move to a predetermined position. After moving to the predetermined position, the operation switch 53 of the electric operation rod 50A is operated, the motor 51 is reversely rotated, and the insertion portion 54 is reversely rotated, whereby the elevating drive mechanism 30 is operated and the link member 36 is operated. The load receiving member 20 moves forward. Since the load receiving member 20 moves forward and the load receiving member 20 moves downward by the lifting cam 21, the pallet G is lowered onto the floor surface F. In this state, the pair of pallet loaders 100 can be pulled out from below the pallet G.

  As described above, the pallet loader 100 according to the present embodiment includes the elevating drive mechanism 30 including the elevating drive worm gear mechanism 31 that operates by the rotation of the input rotation shaft that is rotationally driven from the outside, and the crank mechanism 38. By using it, the carriage 10 is moved up and down by the rotational drive of the input rotation shaft from the outside. That is, as in the conventional art, the operation rod is not moved up and down by raising the operation rod to the rear side or raised to the front side. Elevating operation can be easily performed. Further, since the elevating drive mechanism 30 employs the crank mechanism 38, transmission of force applied in the reverse direction from the pulling connection portion 25 side of the load receiving member 20 is blocked by the crank mechanism 38. For this reason, since the cargo receiving member 20 is automatically locked at the raised position and does not descend, safety is improved.

  FIG. 4 schematically shows an external configuration of a loader according to a second embodiment of the present invention. This 2nd Embodiment is related with the pallet loader which handles a pallet as a load, and has the structure which performs the raising / lowering operation | movement of the trolley | bogie manually. In the second embodiment, a manual operation rod 50B is used in place of the electric operation rod 50A in the first embodiment, and other configurations of this embodiment are the same as those in the first embodiment. .

  As shown in FIG. 4, the pallet loader 200 of the present embodiment includes a traveling roller 11, and a carriage 10 that can travel along a rail R that is laid in a groove formed in the floor surface F, and the carriage 10, a load receiving member 20 having an inclined cam 21 for raising and lowering at a lower portion, an elevating drive mechanism 30 fixed to one end of the carriage 10 to raise and lower the load receiving member 20 with respect to the carriage 10, and a rotation driving means. And a manual operation rod 50B.

  Since the structure and operation | movement of the trolley | bogie 10, the cargo receiving member 20, and the raising / lowering drive mechanism 30 are the same as that of the case of 1st Embodiment, description is abbreviate | omitted.

  The manual operation rod 50 </ b> B is inserted into the hexagonal hole 32 of the lifting drive mechanism 30 and is connected to the insertion portion 55 connected to the input rotation shaft of the lifting drive worm gear mechanism 31, the automatic screw transmission mechanism 56, and the automatic screw transmission mechanism 56. A bar-like support member 57 arranged in parallel and a tread plate 58 connected to the slider 56a of the automatic screw transmission mechanism 56 and movable up and down using the bar-like support member 57 as a guide are provided. The insertion portion 55 described above is provided at the lower end of the screw 56b of the automatic screw transmission mechanism 56. Further, an insertion portion 57 a that can be inserted into the through hole 12 provided on the upper surface of the rear side of the lift drive mechanism 30 of the carriage 10 is provided at the lower end of the rod-like support member 57. When the tread plate 58 is stepped on with a foot, the screw 56b is configured to rotate. The slider 56a and the foot plate 58 are restored by the biasing force of the spring 56c connected to the upper part of the slider 56a. Further, the slider 56a has slide type switching means S for switching the rotation direction of the screw 56b when the tread plate 58 is stepped on. When the switching means S is slid downward, the screw 56b rotates clockwise when the tread plate 58 is stepped on, and when it slides upward, the screw 56b rotates counterclockwise when the tread plate 58 is stepped on. Is configured to do. The insertion portion 55 of the manual operation rod 50B is inserted into the hexagonal hole 32 so as to be connected to the input rotation shaft, and the insertion portion 57a is inserted into the through hole 12 and fixed. , And the screw 56b is rotated to rotate the insertion portion 55, and the lifting drive worm gear mechanism 31 is rotated.

  As described above, the pallet loader 200 according to the present embodiment includes the lifting / lowering drive mechanism 30 including the lifting / lowering worm gear mechanism 31 that operates by the rotation of the input rotation shaft that is rotationally driven from the outside, and the crank mechanism 38. By using it, the carriage 10 is moved up and down by the rotational drive of the input rotation shaft from the outside. That is, as in the conventional technique, the operation rod is not moved up and down by moving it forward or forward, but is raised and lowered by manual rotation, so it is safer and more Elevating operation can be easily performed. In addition, since the motor is not used, it is not disabled due to battery exhaustion, motor failure, etc., and highly reliable work is possible. Further, since the elevating drive mechanism 30 employs the crank mechanism 38, transmission of force applied in the reverse direction from the pulling connection portion 25 side is blocked by the crank mechanism 38. For this reason, since the cargo receiving member 20 is automatically locked at the raised position and does not descend, safety is improved.

  FIG. 5 schematically shows the external configuration of the third embodiment of the loader of the present invention, FIG. 6 shows the internal configuration of the loader in an exploded manner, and FIG. 7 shows the lift drive mechanism portion of the loader. FIG. 8 shows in detail the configuration and operation of the lift drive mechanism portion of the loader. The third embodiment relates to a pallet loader that handles a pallet as a load, and is configured to electrically move the cart up and down.

  As shown in these drawings, the pallet loader 300 according to the present embodiment includes a traveling roller 11 and a carriage 10 that can travel along a rail R that is laid in a groove formed in a floor surface F. A load receiving member 20 mounted on the carriage 10 and having an inclined cam 21 for raising and lowering, a lifting drive mechanism 30 fixed to one end of the carriage 10 to raise and lower the load receiving member 20 with respect to the carriage 10, and the carriage 10 A travel drive mechanism 40 for traveling along the rail R and an electric operation rod 50A having a rotation drive means are provided.

  The carriage 10 is a member that is formed by sheet metal processing a stainless steel plate and has a U-shaped cross section that includes a bottom surface 10a and both side walls 10b. A plurality of openings 10c for arranging the traveling rollers 11 are formed on the bottom surface 10a. The shaft 11a of the traveling roller 11 is inserted through the side walls 10b. Each traveling roller 11 is rotatably supported with respect to this shaft 11a. The carriage 10 can travel along a rail R (see FIG. 8) laid in a loader groove formed on the floor surface F. In order to reduce the weight, a plurality of openings are provided in addition to the position where the traveling roller 11 is disposed on the bottom surface 10a.

  The load receiving member 20 is a member formed by sheet metal processing a stainless steel plate and having a U-shaped cross section composed of an upper surface 20a and both side walls 20b. A lifting cam 21 is formed at the lower end of both side walls 20b. The cargo receiving member 20 is mounted on the carriage 10 and supported by the ends of the plurality of shafts 11 a of the plurality of traveling rollers 11. When the load receiving member 20 is in the lowered position, the end of each shaft 11a is fitted into the arcuate upper end portion 21a of the lifting cam 21. On the other hand, when the load receiving member 20 is in the raised position, The end portion of the shaft 11a is in contact with the substantially horizontal lower end portion 21b of the lifting cam 21. A connecting pin 22 is provided between the side walls 20b. Moreover, it has the standing part 23 formed by bending upward at one end (rear end) of the cargo receiving member 20. Further, on the upper surface 20a of the cargo receiving member 20, there is provided a positioning member 24 (see FIG. 5) that can be raised and stored at a predetermined distance from the rising portion 23. The standing member 23 or the positioning member 24 can be used for positioning by inserting the cargo receiving member 20 into the lower part of the pallet G in accordance with the size of the pallet G (see FIG. 8). A pull-up connecting portion 25 is provided below the raised portion 23, and the pull-up connecting portion 25 is connected to a crank arm 37 of the lifting drive mechanism 30.

  The elevating drive mechanism 30 includes an elevating drive worm gear 31 formed by engaging an elevating drive worm shaft 31a serving as an input rotation shaft and an elevating drive worm gear 31b engaged with the elevating drive worm shaft 31a. A pair of driving gears 33a and 33b fixed to both ends of the worm gear 31b, a pair of intermediate gears 34a and 34b meshing with the driving gears 33a and 33b, respectively, and a pair of gears meshing with the intermediate gears 34a and 34b, respectively. The driven gears 35a and 35b, a pair of crank wheels (rotating wheels) 36a and 36b fixed inside the driven gears 35a and 35b, and a crank pin P provided at one end between the crank wheels 36a and 36b. A club that is pivotally supported and has the other end connected to the pull-up connecting portion 25. And a crank mechanism 38 comprising a Kuamu 37.. A hexagonal hole 32 into which the insertion portion 54 of the electric operation rod 50A is fitted is provided at the upper end of the input rotation shaft coaxial with the lifting drive worm shaft 31a. In the lifting drive worm gear mechanism 31, when the lifting drive worm shaft 31a on the input rotating shaft side rotates, the lifting drive worm gear 31b engaged therewith also rotates. As a result, the intermediate gears 34 a and 34 b, the driven gears 35 a and 35 b, and the crank wheels 36 a and 36 b also rotate, and the load receiving member 20 can be moved in the front-rear direction via the crank arm 37. The load receiving member 20 moves in the front-rear direction, and the load receiving member 20 is moved in the up-down direction by the lift cam 21.

  The travel drive mechanism 40 meshes with the travel drive worm shaft 41 provided so that the rotation axis is in the vertical direction, and the travel drive worm shaft 41 is provided so that the rotation axis is in the horizontal direction. The travel drive worm gear 42 and a pair of drive rollers 43 mounted coaxially on the travel drive worm gear 42 are mainly configured. A hexagonal hole 41 a into which the insertion portion 54 of the electric operation rod 50 </ b> A is fitted is provided at the upper end of the travel drive worm shaft 41. By rotating the travel drive worm shaft 41 by the rotation of the insertion portion 54, the drive roller 43 is rotated via the travel drive worm gear 42. Thereby, the pallet loader 300 can travel along the rail R.

  The electric operation rod 50 </ b> A is inserted into the hexagonal hole 32 of the motor 51, the battery 52 for driving the motor 51, the operation switch 53, and the elevating drive mechanism 30 and used as the input rotation shaft of the elevating drive worm gear mechanism 31. Or an insertion portion 54 that is inserted into the hexagonal hole 41a of the travel drive worm shaft 41 and connected to the travel drive worm shaft 41. By inserting the insertion portion 54 into the hexagonal hole 32 or the hexagonal hole 41a and operating the operation switch 53 to rotate the motor 51, the lifting / lowering worm gear mechanism 31 or the traveling driving worm shaft 41 is rotated.

  FIG. 8A shows a state in which the pallet loader 300 is inserted below the pallet G on the rail R laid in the loader groove formed on the floor surface F, and FIG. The state where the pallet G is lifted to a position higher than the floor surface F by the pallet loader 300 is shown.

  As shown in FIG. 8A, when the pallet loader 300 is inserted into the lower part of the pallet G along the rail R formed on the floor F, the pallet loader 300 is placed on the rail R where the pallet loader 300 is already installed. When loading G, since the load receiving member 20 is in the lowered position and the surface 20a of the load receiving member 20 is lower than the floor surface F, the pallet loader 300 does not contact the pallet G. Therefore, the pallet loader 300 can be smoothly inserted or pulled out. In addition, when inserting the pallet loader 300, the insertion position is inserted to a position where the pallet loader abuts against the rising portion 23, for example, in accordance with the size of the pallet G. Next, the electric operation rod 50A is mounted. In this case, the insertion portion 54 of the electric operation rod 50 </ b> A is inserted into the hexagonal hole 32. The above operation is similarly performed for the pair of pallet loaders 300.

  Thereafter, the following operations are performed simultaneously for the pair of pallet loaders 300. First, the elevation drive mechanism 30 is operated by operating the operation switch 53 of the electric operation rod 50 </ b> A to rotate the motor 51 to rotate (forward rotation) the insertion portion 54. That is, as shown in FIG. 8B, the load receiving member 20 moves rearward (upward / downward drive mechanism 30 side) via the crank arm 37. Since the cargo receiving member 20 moves rearward and moves upward by the lifting cam 21, the pallet G is lifted to a position higher than the floor surface F.

  In this state, the insertion portion 54 of the electric operation rod 50A is removed from the hexagon hole 32 and inserted into the hexagon hole 41a, the operation switch 53 of the electric operation rod 50A is operated, and the motor 51 is rotated to rotate the insertion portion 54 ( The traveling drive mechanism 40 is operated by rotating it forward. That is, as shown in FIG. 8C, the pallet G is moved while being lifted.

  After moving to a predetermined position, the insertion portion 54 of the electric operation rod 50A is pulled out from the hexagon hole 41a and inserted back into the hexagon hole 32, and the operation switch 53 of the electric operation rod 50A is operated to reversely rotate the motor 51. By rotating the insertion portion 54 in the reverse direction, the elevating drive mechanism 30 operates, and the cargo receiving member 20 moves forward via the crank arm 37. Since the load receiving member 20 moves forward and the load receiving member 20 moves downward by the lifting cam 21, the pallet G is lowered onto the floor surface F. In this state, the pair of pallet loaders 300 can be pulled out from below the pallet G.

  As described above, the pallet loader 300 according to the present embodiment includes the elevating drive mechanism 30 including the elevating drive worm gear mechanism 31 that operates by the rotation of the input rotation shaft that is rotationally driven from the outside, and the crank mechanism 38. In addition, by using the traveling drive mechanism 40, the carriage 10 is moved up and down by the rotational drive of the input rotation shaft from the outside. That is, as in the prior art, it is not a configuration for raising and lowering the carriage 10 by tilting the operation rod backward or raising it forward, but because it is raised and lowered by electric rotational drive, more safely, The raising / lowering operation can be performed more easily, and the movement of the pallet loader 300 is also electrically performed, so that the moving operation can be performed more easily. Further, since the elevating drive mechanism 30 employs the crank mechanism 38, transmission of force applied in the reverse direction from the pulling connection portion 25 side is blocked by the crank mechanism 38. For this reason, since the cargo receiving member 20 is automatically locked at the raised position and does not descend, safety is improved.

  FIG. 9 schematically shows an external configuration of a loader according to a fourth embodiment of the present invention. The fourth embodiment relates to a pallet loader that handles a pallet as a load, and is configured to manually move the cart up and down and move it. In the fourth embodiment, a manual operation rod 50B is used in place of the electric operation rod 50A in the third embodiment, and other configurations of the present embodiment are the same as those of the third embodiment. .

  As shown in FIG. 9, the pallet loader 400 of the present embodiment includes a traveling roller 11, a carriage 10 that can travel along a rail R laid in a groove formed in a floor surface F, and the carriage 10, a load receiving member 20 having an inclined cam 21 for raising and lowering, a lifting drive mechanism 30 fixed to one end of the carriage 10 for raising and lowering the load receiving member 20 with respect to the carriage 10, and the carriage 10 as a rail. A travel drive mechanism 40 for traveling along R and a manual operation rod 50B having a rotation drive means are provided.

  Since the configurations and operations of the carriage 10, the cargo receiving member 20, the elevating drive mechanism 30, and the travel drive mechanism 40 are the same as those in the third embodiment, description thereof is omitted. Moreover, since the structure and operation | movement of the manual operation rod 50B are the same as that of the case of 2nd Embodiment, description is abbreviate | omitted.

  As described above, the pallet loader 400 according to the present embodiment includes the elevating drive mechanism 30 including the elevating drive worm gear mechanism 31 that operates by the rotation of the input rotation shaft that is rotationally driven from the outside, and the crank mechanism 38. Further, by using the traveling drive mechanism 40, the carriage 10 is moved up and down by the rotational drive of the input rotation shaft from the outside. That is, as in the conventional technique, the operation rod is not moved up and down by moving it forward or forward, but is raised and lowered by manual rotation, so it is safer and more The lifting / lowering operation can be easily performed, and the movement of the pallet loader 400 can be easily performed because the pallet loader 400 is also moved manually. In addition, since the motor is not used, it is not disabled due to battery exhaustion, motor failure, etc., and highly reliable work is possible. Further, since the elevating drive mechanism 30 employs the crank mechanism 38, transmission of force applied in the reverse direction from the pulling connection portion 25 side is blocked by the crank mechanism 38. For this reason, since the cargo receiving member 20 is automatically locked at the raised position and does not descend, safety is improved.

  FIG. 10 schematically shows an external configuration of a loader according to a fifth embodiment of the present invention. The fifth embodiment relates to a pallet loader that handles a pallet as a load, and has a configuration in which the cart is lifted and moved electrically and remotely. In the fifth embodiment, a remotely operated electric drive mechanism is used instead of the electric operation rod 50A in the third embodiment or the manual operation rod 50B in the fourth embodiment. Other configurations of the present embodiment are the same as those of the third embodiment.

  As shown in FIG. 10, the pallet loader 500 according to the present embodiment has a traveling roller 11 and can travel along a rail R laid in a groove formed on the floor surface F, and the cart. 10, a load receiving member 20 having an inclined cam 21 for raising and lowering, a lifting drive mechanism 30 fixed to one end of the carriage 10 for raising and lowering the load receiving member 20 with respect to the carriage 10, and the carriage 10 as a rail. A travel drive mechanism 40 for traveling along R, an electric drive mechanism 50C having a rotation drive means, and a remote controller 60 for operating the electric drive mechanism 50C are provided.

  Since the configurations and operations of the carriage 10, the cargo receiving member 20, the elevating drive mechanism 30, and the travel drive mechanism 40 are the same as those in the third embodiment, description thereof is omitted.

  The electric drive mechanism 50C is inserted into the hexagonal hole 32 of the lift drive mechanism 30 and inserted into the hexagon hole 41a of the travel drive mechanism 40 and the insertion portion 54a connected to the input rotation shaft of the lift drive worm gear mechanism 31. And an insertion portion 54b connected to the drive worm shaft 41. The electric drive mechanism 50C further includes a motor 51a that rotationally drives the insertion portion 54a, a battery 52a for driving the motor 51a, and a wireless or infrared receiver (not shown). The electric drive mechanism 50C further includes a motor 51b that rotationally drives the insertion portion 54b, and a battery 52b that drives the motor 51b.

  The remote controller 60 is for remotely operating the electric drive mechanism 50C by wireless communication or infrared communication. The remote controller 60 includes, for example, two operation buttons 61 and 62 that generate signals for rotating the motor 51a forward (clockwise) and reverse (counterclockwise), and forward and reverse rotation of the motor 51b. And an operation button 63 for generating a signal for performing the operation and a wireless or infrared transmitter (not shown) for transmitting the signal from the operation buttons 61 and 62 or the operation button 63 to the wireless or infrared receiver of the electric drive mechanism 50C. doing.

  As described above, the pallet loader 500 in the present embodiment includes the elevating drive mechanism 30 including the elevating drive worm gear mechanism 31 that operates by the rotation of the input rotation shaft that is rotationally driven from the outside, and the crank mechanism 38. By using the traveling drive mechanism 40, the carriage 10 is moved up and down by rotational driving of the input rotation shaft from the outside. That is, as in the conventional art, the operation rod is not moved up and down by raising the operation rod to the rear side or raised to the front side. The lifting and lowering operation can be easily performed, and the movement of the pallet loader 500 is also electrically performed. Therefore, the moving operation can be performed more easily. Furthermore, since the electric drive mechanism 50C and the remote controller 60 are used to move the cart 10 up and down by remote operation, the operation can be performed very easily and safely. In addition, since the elevating drive mechanism 30 employs the crank mechanism 38, transmission of force applied in the reverse direction from the pulling connection portion 25 side is blocked by the crank mechanism 38. For this reason, since the cargo receiving member 20 is automatically locked at the raised position and does not descend, safety is improved.

  FIG. 11 is an exploded view showing the internal configuration of the sixth embodiment of the loader of the present invention, and FIG. 12 shows in detail the configuration of the lift drive mechanism portion of the loader. The sixth embodiment relates to a pallet loader that handles a pallet as a load, and has a configuration in which the carriage is lifted and moved electrically and remotely. In the sixth embodiment, the lifting drive 30 in the third embodiment uses a lifting drive worm gear mechanism 31 and a chain transmission crank mechanism 38A. Other configurations of the present embodiment are the same as those of the third embodiment.

  As shown in FIGS. 11 and 12, the pallet loader 600 of the present embodiment includes a traveling roller 11, and a carriage 10 that can travel along a rail R laid in a groove formed in the floor surface F. A load receiving member 20 mounted on the carriage 10 and having an inclined cam 21 for raising and lowering; a lifting drive mechanism 30A fixed to one end of the carriage 10 to raise and lower the load receiving member 20 with respect to the carriage 10; Travel drive mechanism 40 for traveling 10 along rail R, electric drive mechanism 50C (not shown, see FIG. 10) having rotation drive means, and remote controller 60 (for operating electric drive mechanism 50C). (See FIG. 10).

  The lift drive mechanism 30A includes a lift drive worm gear 31 formed by meshing a lift drive worm shaft 31a serving as an input rotation shaft and a lift drive worm gear 31b engaged with the lift drive worm shaft 31a. One drive gear 33a and 33b fixed to both ends of the worm gear 31b, a pair of driven gears 35a and 35b meshing with the drive gears 33a and 33b, respectively, and two sets of chain transmission crank mechanisms 38A. ing. The crank mechanism 38A includes a pair of drive chain wheels (rotating wheels) 39a and 39b fixed to the inside of the driven gears 35a and 35b, driven chain wheels 39c and 39d, and 2 arranged on a parallel plane at a predetermined interval. One chain C, and a crank arm 37 having one end pivotally supported by a crank pin P provided between the two chains C and the other end connected to the lifting connecting portion 25. A hexagonal hole 32 into which the insertion portion 54 of the electric operation rod 50A is fitted is provided at the upper end of the input rotation shaft coaxial with the lifting drive worm shaft 31a. In the lifting drive worm gear mechanism 31, when the lifting drive worm shaft 31a on the input rotating shaft side rotates, the lifting drive worm gear 31b engaged therewith also rotates. As a result, the driven gears 35 a and 35 b and the drive chain wheels 39 a and 39 b also rotate, and the cargo receiving member 20 can be moved in the front-rear direction via the crank arm 37. The load receiving member 20 moves in the front-rear direction, and the load receiving member 20 is moved in the up-down direction by the lift cam 21.

  As described above, the pallet loader 600 according to the present embodiment includes the elevating drive mechanism 30A including the elevating drive worm gear mechanism 31 that operates by the rotation of the input rotation shaft that is rotationally driven from the outside, and the crank mechanism 38A. In addition, by using the traveling drive mechanism 40, the carriage 10 is moved up and down by the rotational drive of the input rotation shaft from the outside. That is, as in the prior art, it is not a configuration for raising and lowering the carriage 10 by tilting the operation rod backward or raising it forward, but because it is raised and lowered by electric rotational drive, more safely, The raising / lowering operation can be performed more easily, and the movement of the pallet loader 600 is also electrically performed. Therefore, the moving operation can be performed more easily. Further, since the elevating drive mechanism 30A employs the crank mechanism 38A, transmission of force applied in the reverse direction from the lifting connection portion 25 side is blocked by the crank mechanism 38A. For this reason, since the cargo receiving member 20 is automatically locked at the raised position and does not descend, safety is improved. Further, by using the chain transmission crank mechanism 38A, the height of the pallet loader 600 can be made lower than when the crank mechanism 38 of the first to fifth embodiments is used, and the elevating drive mechanism 30A and the travel drive mechanism 40 are also provided. It can fit in the groove of the rail R. Therefore, when the pallet is placed on the pallet loader 600, it is possible to prevent the pallet loader 600 from being deformed due to the displacement of the pallet placement position without interfering with the drive unit.

  In addition, although the structural example which provided the motors 51a and 51b and the batteries 52a and 52b integrally in the pallet loader 500 mentioned above was demonstrated, this invention is not limited to this. For example, the battery may be arranged at a location different from the motor.

  In the above-described pallet loader 500, the electric drive mechanism 50C has been described with respect to the configuration example that drives both the lift drive mechanism 30 and the travel drive mechanism 40, but the present invention is not limited to this. For example, only the lifting drive mechanism 30 may be driven. In this case, the electric drive mechanism 50C includes a single insertion portion 54a, a single motor 51a that rotationally drives the insertion portion 54a, a single battery 52a for driving the motor 51a, and wireless reception (not shown). A single insertion portion 54a is sequentially inserted into the hexagon hole 32 of the lift drive mechanism 30 and the hexagon hole 41a of the travel drive mechanism 40, and the lift drive mechanism 3 and the travel drive mechanism 40 are sequentially driven.

  Further, in the above-described pallet loaders 100 to 500, a chain transmission crank mechanism 38A may be used instead of the crank mechanism 38. Other crank mechanisms may be used.

  In the pallet loader 600 described above, the electric operation rod 50A in the third embodiment or the manual operation rod 50B in the fourth embodiment may be used instead of the electric drive mechanism 50C and the remote controller 60.

  All the embodiments described above are illustrative of the present invention and are not intended to be limiting, and the present invention can be implemented in other various modifications and changes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

DESCRIPTION OF SYMBOLS 10 Bogie 10a Bottom surface 10b Side wall 10c Opening part 11 Traveling roller 11a Shaft 20 Load receiving member 20a Upper surface 20b Side wall 21 Lifting inclination cam 21a Upper end part 21b Lower end part 22 Connection pin 23 Erecting part 24 Positioning member 25 Lifting connection part 30, 30A Elevation Drive mechanism 31 Lifting drive worm gear mechanism 31a Lifting drive worm shaft 31b Lifting drive worm gear 32, 41a Hexagonal holes 33a, 33b Drive gears 34a, 34b Intermediate gears 35a, 35b Driven gears 36a, 36b Crank wheel 37 Crank arm 38, 38A Crank mechanism 39a, 39b Drive chain wheel (rotating wheel)
39c, 39d Drive chain wheel 40 Travel drive mechanism 41 Travel drive worm shaft 42 Travel drive worm gear 43 Drive roller 50A Electric operation rod 50B Manual operation rod 50C Electric drive mechanism 51, 51a, 51b Motor 52, 52a, 52b Battery 53 operation Switch 54, 54a, 54b, 55, 57a Insertion part 56 Automatic screw mechanism 56a Slider 56b Screw 56c Spring 57 Bar-shaped support member 58 Tread plate 60 Remote controller 61, 62, 63 Operation buttons 100, 200, 300, 400, 500, 600 Pallet Loader C Chain F Floor G Pallet P Crankpin R Rail S Switching means

Claims (10)

A carriage having a running roller and capable of running along a grooved rail formed on the floor;
A load receiving member mounted on the carriage and having an ascending / descending cam at the bottom;
An elevating drive mechanism fixed to one end of the carriage and elevating the cargo receiving member with respect to the carriage;
The elevating drive mechanism includes an elevating drive worm gear that has an elevating drive worm shaft that rotates by an external rotational drive and an elevating drive worm gear that meshes with the elevating drive worm shaft, and is coaxial with the elevating drive worm gear. A loader comprising: a rotating wheel interlocked with a mounted drive gear; and a crank mechanism having a crank arm having one end interlocked with the rotating wheel and the other end coupled to the load receiving member.   The insertion portion further includes an operation rod that can be fitted to the lifting drive worm shaft, and the operation rod has a rotation driving means for rotating the insertion portion. Loader.   The loader according to claim 2, wherein the rotation driving unit is an electric rotation driving unit having a motor for rotating the insertion portion and a battery for driving the motor.   The loader according to claim 2, wherein the rotation driving unit is a manual rotation driving unit that manually rotates the insertion portion.   The manual rotation driving means is connected to an automatic screw transmission mechanism in which a pressing force is changed into a rotational force, a rod-like support member arranged in parallel to the automatic screw transmission mechanism, and a slider of the automatic screw transmission mechanism, The loader according to claim 4, further comprising a tread plate that can move up and down using the support member as a guide. A travel drive mechanism for traveling the carriage along the groove-shaped rail;
The travel drive mechanism is composed of a travel drive worm shaft, a travel drive worm gear meshing with the travel drive worm shaft, and a drive roller mounted coaxially to the travel drive worm gear. The loader according to any one of claims 1 to 5.   The loader according to claim 6, wherein the insertion portion of the operation rod can be fitted into the traveling drive worm shaft.   A first rotation driving means having an insertion part that can be fitted to the lifting drive worm shaft and configured to rotate the insertion part, and an insertion part that can be fitted to the traveling drive worm shaft The loader according to claim 1, further comprising: a second rotation driving unit configured to rotate the insertion portion.   Each of the first rotation driving means and the second rotation driving means is an electric rotation driving means having a motor for rotating the insertion portion and a battery for driving the motor. The loader according to claim 8.   The loader according to claim 9, further comprising a remote controller for operating the first rotation driving means and / or the second rotation driving means.

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