JP6124457B2 - Floor cargo conveyor - Google Patents

Description

  The present invention relates to an on-floor cargo conveying apparatus.

  As a conventional cargo transportation apparatus on the floor, for example, there is one described in Patent Document 1. This on-floor cargo conveying device includes a roller frame and a receiving platform. The roller frame has a plurality of rollers and can travel on a rail groove provided on the floor surface. The load receiving platform is for loading cargo and is installed on the roller frame and can be moved up and down with respect to the roller frame. The cargo can be moved with a light force by lifting the cargo from the floor by raising the loading platform and running the roller frame in this state. On the other hand, the cargo can be placed on the floor surface by being lowered. Cargo does not move when placed on the floor. Moreover, a pair of left and right side rollers is provided on the side surface in the longitudinal direction of the roller frame and / or the load receiving table. When the roller frame and the load receiving table are moved to the left and right in the rail groove during traveling, the side roller rotates while contacting the rail groove. As a result, smooth running is possible.

JP 2002-114384 A

  Since the rail groove of the floor cargo transport device is formed below the floor surface, dust on the floor, broken pallet fragments, fibrous dust from the cargo packing material, etc. enter the rail groove, and the side rollers and It adheres to the rotating shaft and hinders its smooth rotation. When the side roller does not rotate, the contact area with the wall surface of the rail groove of the side roller itself is small, so that damage to each member becomes larger than the collision between the frame and the side wall of the rail groove. Therefore, it is necessary to perform maintenance such as cleaning for regularly and smoothly rotating the side rollers and repairing of the side roller parts.

  However, the side roller described in Patent Document 1 is rotatably supported by a vertical axis 35 on a support frame 6 including a base 37, an upper part 38, a lower part 39, a hollow part 40, and the like. It is fastened from the side surface of the front end portion of the roller frame 2 by a set screw 26 (see FIG. 3 of Patent Document 1). For this reason, even if the side rollers can be removed, in order to clean the upper and lower parts that serve as bearings and the hollow parts that serve as storage parts, it is necessary to carry out the work by taking out the cargo carrier on the floor itself from the rail groove. However, there was a problem that workability was poor.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an on-floor cargo transport device that enables stable traveling and improved maintainability.

Means for Solving the Problems and Effects of the Invention

  The first invention has a plurality of traveling rollers, a roller plate that enables traveling on rails arranged along the floor surface, and a mounting surface that is attached to the roller plate and on which cargo is placed. A main body frame, provided between the roller plate and the main body frame, between the lowered position where the main body frame is accommodated in the internal space of the rail and the raised position where the main body frame protrudes from the rail. A side roller having a side roller that is provided with a holder having at least one side wall parallel to the mounting surface at one end of the main body frame and protrudes on both sides in the width direction of the main body frame. The unit is fastened to the side wall of the holder.

  According to the present invention, a holder having a side wall parallel to the mounting surface of the main body frame is provided at one end of the main body frame that moves to the raised position, and the side roller unit is fastened to the side wall. Can be detached from the body frame. Therefore, the maintenance work of the side roller becomes easy. Furthermore, the cost can be reduced compared to the case where the main body frame provided with the side rollers is replaced. Moreover, after attaching a holder with respect to a main body flame | frame, it also becomes possible to retrofit to the existing floor cargo conveyance apparatus by attaching a side roller unit to a holder.

  According to a second aspect, in the first aspect, the side roller unit is fastened to the side wall of the holder from the placement surface side.

  According to the present invention, the side roller unit can be removed without being taken out of the rail from the rail by being fastened from the mounting surface side of the holder. Therefore, the replacement work of the side roller unit is facilitated, and the workability during maintenance is improved.

  A third invention is characterized in that, in the first or second invention, the holder is formed in a U-shaped cross section, and the side roller unit is fastened between a pair of opposing side walls. To do.

  According to the present invention, the side roller unit is firmly fixed because it is fastened between the pair of opposing side walls of the holder. Therefore, even if it hits the cargo placed on the floor at the end of the rail or in the raised state, it will not be damaged.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the side roller unit is provided at both ends in the longitudinal direction of the main body frame.

  According to the present invention, the side roller units are respectively provided at both ends in the longitudinal direction of the main body frame. As a result, even when the cargo carrier on the floor slides on the side wall of the rail, even more stable travel is possible.

It is a side view of a cargo transportation apparatus on a floor when a main part frame exists in a lowered position. It is a side view of an on-floor cargo conveyance device when a main part frame exists in a raised position. (A) is an AA arrow view of FIG. 1, (b) is an A'-A 'arrow view of FIG. It is a figure which shows the whole structure of an on-floor cargo conveyance apparatus, (a) is a top view, (b) is a side view, (c) is a bottom view. It is a perspective view of the guide unit attached to the front-end surface of the longitudinal direction of a main body frame. It is a disassembled perspective view of a guide unit. It is a figure when the cargo transportation apparatus on the floor is mounted in the rail with the traveling roller facing upward. It is a figure which shows the use condition of an on-floor cargo conveying apparatus.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show the up-down direction and the front-rear direction of the floor cargo transport apparatus 1. FIG. 3 and FIG. 7 show the up-down direction and the left-right direction of the floor cargo transport apparatus 1. FIG. 4 shows the front-rear direction of the cargo transport apparatus 1 on the floor. 5 and 6 show the up-down direction, the left-right direction, and the front-rear direction of the floor cargo transport apparatus 1.

  As shown in FIGS. 1 to 3 and 8, the on-floor cargo transport apparatus 1 is used when a cargo 17 is carried in and out. The floor cargo transport apparatus 1 is accommodated in the internal space S of the rail 3 provided on the floor surface 19. The rail 3 is fitted into a groove provided so as to extend in the front-rear direction of the floor surface 19. As shown in FIG. 3, the rail 3 has a substantially U-shaped cross section. The rail 3 has a width changing portion 3a at the central portion in the depth direction, and is formed so that the lower portion is narrowed from the central portion to the upper portion from the central portion. The width in the left-right direction at the lower part of the rail 3 in the depth direction is smaller than the width between the left and right ends of the two side rollers 20 attached to the side roller unit 4a. The floor surface 19 is, for example, the floor surface of a cargo bed of a cargo vehicle such as a truck. The floor cargo transport device 1 includes a main body frame 2, a roller plate 11, a link mechanism 8, a cam mechanism 30, and a guide unit 4.

(Body frame)
As shown in FIG. 1, the main body frame 2 extends elongated along the inner periphery of a rail 3 provided on a floor surface 19 of a loading platform of a cargo vehicle such as a truck. The length of the main body frame 2 in the longitudinal direction is appropriately selected depending on the size of the cargo 17 and the number of traveling rollers 16 supported by the roller plate 11. The main body frame 2 is accommodated in the internal space S of the rail 3 so as to be able to travel in the front-rear direction. The main body frame 2 includes a pair of left and right side plates 53 that are elongated along the rail 3, a top plate 2b that extends along the upper surface of the two side plates 53 and connects the side plates 53, two side plates 53, and The top plate 2b has end plates 58 at both ends in the longitudinal direction. The top plate 2b constitutes a loading platform 2b on which the cargo 17 is loaded. In addition, the top plate 2b is provided with an opening 57 that enables an operation by the operation lever 21 in a portion corresponding to the upper side of the link mechanism 8 described later. Further, the top plate 2 b is provided with a notch 2 a for accommodating the upper surface of the traveling roller 16 when the main body frame 2 is lowered with respect to the roller plate 11. The end plate 58 is provided with two bolt holes 26 as shown in FIG. The main body frame 2 is desirably formed of aluminum for the purpose of reducing the overall weight and weight, but may be formed of a material other than aluminum, for example, steel or stainless steel.

(Roller plate)
The roller plate 11 has a pair of left and right side plates 18 and is housed in the main body frame 2. The space between the side plates 18 is maintained at a predetermined interval by the caulking shaft 13. The traveling roller 16 is rotatably supported between the side plates 18 by the roller shaft 14. The roller plate 11 is connected to the main body frame 2 by a link mechanism 8 described later at the rear part.

  Further, a fall prevention means 61 for preventing the main body frame 2 from falling from the roller plate 11 is provided between the roller plate 11 and the main body frame 2.

(Link mechanism)
The link mechanism 8 is rotatably supported by a shaft 7 provided at the rear portion of the roller plate 11 and has an operation member 9 having a long hole-like slide groove 9a, and provided in the main body frame 2 along the slide groove 9a. And a pin member 10 movably engaged. The operating member 9 is integrally formed with a lever holding portion 9b that is supported by the shaft 7 and holds the operating lever 21, and a sliding frame 9c that constitutes a sliding groove 9a and engages the pin member 10 so as to be movable. Has been configured. The lever holding portion 9b is provided with a holding hole 9d, and the operation lever 21 is inserted into the holding hole 9d. By performing an operation of lowering the operation lever 9d by hand from the front side to the rear side, the operation member 9 rotates about the shaft 7 and the pin member 10 moves along the sliding groove 9a. Thus, the main body frame 2 can move in the front-rear direction with respect to the roller plate 11. At this time, the loading mechanism 2b of the main body frame 2 moves up and down with respect to the roller plate 11 in accordance with the forward / backward movement of the main body frame 2 as the link mechanism 8 rotates by the cam mechanism 30 described later.

  The sliding groove 9a is formed so as to have a substantially arcuate portion 9e protruding outward with respect to the rotation center of the operation member 9, and is engaged so that the pin member 10 moves along the arcuate portion 9e. doing. That is, the sliding groove 9 a is formed in a locus that raises the pin member 10 provided on the main body frame 2 side while being pulled along with the rotation of the operation member 9. And the end position part 9f formed in the pocket shape which the pin member 10 abuts is provided in the back side of the arcuate part 9e of the sliding groove 9a. Further, when the operation member 9 is pushed down to lower the main body frame 2 and the pin member 10 is detached from the pocket-shaped end position portion 9f, the escape portion 9g is moved so that the main body frame 2 smoothly moves forward. Is provided. The escape portion 9g is provided as a space that allows the pin member 10 to move with a margin in a portion of the sliding groove 9a that is positioned to face the sliding surface formed by the arcuate portion 9e.

(Cam mechanism)
The cam mechanism 30 is a mechanism for raising and lowering the main body frame 2 to the ascending position or the descending position in accordance with the movement of the main body frame 2 relative to the roller plate 11 by the link mechanism 8. Here, the raised position is a state in which the main body frame 2 protrudes from the rail 3, and the lowered position is a state in which the main body frame 2 is accommodated in the internal space S of the rail 3. is there. At least one cam mechanism 30 is provided between the roller plate 11 and the main body frame 2. The number of cam mechanisms 30 is appropriately selected according to the length of the roller plate 11. The cam mechanism 30 has an inclined cam 6 fixed by screws 31 on the lower surface of the top plate 2b of the main body frame 11, and a cam roller 15 rotatably supported on a side plate 18 of the roller plate 11 by a shaft 15a. .

  The inclined cam 6 includes an inclined surface 6c formed so that the thickness of the wedge-shaped portion increases from the rear side to the front side and increases in height, and a recess 6a provided continuously to the inclined surface 6c increased to a predetermined height. have. The height of the inclined cam 6 in the recess 6a is a height that secures the rising position of the main body frame 2 when the cam roller 15 is fitted in the recess 6a. And the highest height of the inclined surface 6c is a little higher than the height which ensures the raising position of the main body frame 2, in order to enable the formation of the hollow 6a. As shown in FIG. 1, the cam roller 15 is installed at a position where it comes into contact with the lowest part of the inclined surface 6 c when the main body frame 2 is in the lowered position, and the main body frame 2 is moved back and forth by the link mechanism 8. As it goes on, it is provided at a position where it rides on the inclined cam 6. Further, the distance from the lowest position of the inclined surface 6c to the recess 6a is such that the pin member 10 provided in the main body frame 2 rotates along the sliding groove 9a as shown in FIG. The position is adjusted so as to reach the end position portion 9f shown in FIG.

  As the main frame 2 moves from the front to the rear with respect to the roller plate 11 by the link mechanism 8, the cam mechanism 15 rides on the inclined surface of the inclined cam 6 and raises the main frame 2. When the main body frame 2 reaches the raised position, the cam roller 15 fits into the recess 6a and maintains the raised position of the main body frame 2.

(Guide unit)
As shown in FIGS. 1, 2, and 4, one guide unit 4 is provided on each end face in the longitudinal direction of the main body frame 2. As shown in FIG. 5, the guide unit 4 has a rectangular parallelepiped shape as a whole. The guide unit 4 includes a side roller unit 4a, a holder 4b, and a side roller 20.

  As shown in FIG. 6, the side roller unit 4 a is fitted into a storage portion S <b> 2 provided in the holder 4 b. The side roller unit 4a is a member in which a roller storage portion S1 that is opened left and right and rearward is formed at the center in the height direction. The side roller unit 4a is provided with two holes 22 that penetrate the side roller unit 4a in the vertical direction and into which the pins 27 are inserted. The side roller unit 4a has a bolt hole 23 provided on the upper surface of the side roller unit 4a. Bolts 28 are inserted into the bolt holes 23. Two side rollers 20 are accommodated in the left-right width direction in the roller accommodating portion S1 of the side roller unit 4a. The two side rollers 20 are attached to the side roller unit 4a in a state in which some of them protrude from the roller storage part S2 to the left and right.

  The side roller 20 is attached by inserting a pin 27 into the hole 22 and a hole 20a provided at the center of the side roller 20 and bolting. The side roller 20 is rotatably supported by the pin 27. A plurality of side rollers 20 may be attached to the left and right sides of the side roller unit 4a. At this time, the side roller 20 is installed so that two or more may be arranged in the front-back direction or an up-down direction.

  The holder 4b is a member formed in a U-shaped cross section, and has a storage portion S2 in which the side roller unit 4a is stored at the center in the height direction. The holder 4b is provided with bolt holes 24 that penetrate the holder 4b in the vertical direction and into which the bolts 28 are inserted. The side roller unit 4a is fitted in the storage part S2. The side roller unit 4a is attached to the holder 4b by inserting bolts 28 into the bolt holes 24 and 23 and fastening them with bolts. The holder 4b is provided with two bolt holes 25 that penetrate the rear surface of the holder 4b and into which the bolts 29 are inserted. The holder 4b is attached to the end plate 58 of the main body frame 2 by inserting a bolt 29 into the bolt hole 25 and the bolt hole 26 and fastening them. Thereby, the guide unit 4 is attached to the main body frame 2.

  The side roller 20 protrudes in the left-right direction with respect to the main body frame 2 to which the guide unit 4 is attached. The side roller 20 protrudes from the main body frame 2 by about 1.5 mm on one side.

  The material of the side roller unit 4a, the holder 4b, and the side roller 20 is, for example, aluminum, steel, or stainless steel. For the side roller 20, a commercially available metal bearing or synthetic resin bearing may be used.

(Position of side roller in rail)
When the main body frame 2 is in the lowered position, the upper end of the main body frame 2 does not protrude upward from the rail 3 as shown in FIG. Accordingly, the cargo 17 (pallet 51) is placed on the floor surface 19.
Here, the dimension from the upper end of the rail 3 to the side roller 20 is D1, the dimension from the lower end of the rail 3 to the side roller 20 is D2, and the dimension from the lower end of the rail 3 to the lower end of the width changing portion 3a is D3. When the main body frame 2 is in the lowered position, the side roller 20 is in the position D1 from the upper end and D2 from the lower end (bottom surface) in the internal space S of the rail 3, and D1 ≧ D2. The dimension D2 from the lower end of the rail 3 to the side roller 20 is larger than the dimension D3 from the lower end of the rail 3 to the lower end of the width changing portion 3a, and D2> D3. Therefore, the side roller 20 and the width change part 3a do not interfere.

  When the main body frame 2 is in the raised position, the upper end of the main body frame 2 jumps up from the rail 3 as shown in FIG. As a result, the cargo 17 (pallet 51) rises from the floor surface 19. At this time, the side roller 20 is located in the upper half of the internal space S of the rail 20. Here, the center in the depth direction of the rail 3 is sandwiched, and the upper half from the center is the upper half of the rail 3, and the lower from the center is the lower half of the rail 3.

(Operation of cargo transportation on the floor during cargo transportation)
As shown in FIG. 1, a rail 3 is provided, and a cargo 17 (pallet 51) is placed in an internal space S of the rail 3 on a floor surface 19 in which the on-floor cargo transport device 1 in which the main body frame 2 is in the lowered position is stored. ) Is placed. Next, the operation lever 21 is lowered so as to be pulled from the front side to the rear side so as to change from the state of FIG. 1 to the state of FIG. As a result, the main body frame 2 jumps out of the rail 3 and the cargo 17 (pallet 51) rises from the floor surface 19. As a result, the cargo 17 (pallet 51) is placed on the top plate 2b of the main body frame 2.

  In this state, when the cargo 17 is pushed back and forth, the traveling roller 16 provided on the roller plate 11 rotates, whereby the on-floor cargo transportation device 1 travels. Thereby, the cargo 17 (pallet 51) can be conveyed with a light force. In addition, when the on-floor cargo transport device 1 is inclined with respect to the rail 3 or close to one side in the width direction, the side roller 20 rotates while contacting the rail 3. Thereby, the on-floor cargo transport apparatus 1 can travel without being caught by the rail 3.

  After the cargo 17 (pallet 51) is transported to a desired position, the operation lever 21 is pushed up from the rear side to the front side so that the state shown in FIG. Is lowered to the lowered position. The main body frame 2 is lowered and stored in the internal space S of the rail 3, so that the cargo 17 (pallet 51) is placed on the floor surface 19.

(About the storage of the cargo transportation device on the floor when there is no cargo in the loading platform)
When there is no cargo 17 in the loading platform of a freight vehicle such as a truck, when there is no mechanism for locking the on-floor cargo transport device 1, for example, an inertial force at the time of running vibration or braking is applied. There is a problem that the cargo transportation device 1 travels in the rail 3.
At this time, as shown in FIG. 7, the floor cargo transportation device 1 may be placed upside down and placed in the internal space S of the rail 3. Here, when the floor cargo transportation device 1 is placed on the floor surface 19 in the upside down direction, the floor cargo transportation device 1 has the top plate 2 b of the main body frame 2 hitting the floor surface of the rail 3. That is, since the traveling roller 16 faces upward, the on-floor cargo conveying device 1 does not move during traveling. Moreover, as shown in FIG. 3, the side roller 20 is in the position of D1 from the upper end and D2 from the lower end (bottom surface) in the internal space S of the rail 3, and D1 ≧ D2. Therefore, as shown in FIG. 7, the side roller 20 does not interfere with the width changing portion 3 a of the rail 3 even if the floor cargo transport device 1 is turned upside down in the rail 3. Therefore, the floor cargo transportation device 1 can be stored and stored in the rail 3 in a stable state.

(Action / Effect)
In the present embodiment, the side roller unit 4a is fixed to the holder 4b by a bolt 28 from the mounting surface side, and the holder 4b is bolted by inserting a bolt 29 into the bolt hole 25 and the bolt hole 26. Is attached to the end plate 58 of the main body frame 2. Thereby, the guide unit 4 is attached to the main body frame 2. Therefore, the side roller unit 4a and the holder 4b can be easily attached to and detached from the main body frame 2. Thereby, when the side roller 20 is worn by contact with the rail 3, either the side roller unit 4 a or the holder 4 b attached to the main body frame 2 can be removed without removing the floor cargo transport apparatus 1 from the rail 3. Replacement and maintenance work becomes easy. Further, both the side roller unit 4a and the holder 4b can be individually replaced, and therefore the main body frame 2 can be used repeatedly without being replaced. Thereby, cost can be reduced compared with the case where it replaces | exchanges the main body frame 2 to which the guide unit 4 was attached.

  Further, in the present embodiment, when the main body frame 2 is in the raised position protruding from the rail 3, that is, when the cargo 17 is transported by the floor cargo transport device 1, the side roller 20 is positioned above the inner space S of the rail 3. Located in half. Accordingly, the distance from the contact point between the side roller 20 and the rail 3 to the center of gravity of the cargo 17 is small as compared with the case where the side roller 20 is positioned at the lower side in the rail 3 at the raised position. Accordingly, since the moment around the contact point between the side roller 20 and the rail 3 is reduced, the on-floor cargo conveying device 1 is not easily tilted during traveling. Thereby, the on-floor cargo conveying apparatus 1 can stably travel. From the viewpoint of reducing the moment around the contact point between the side roller 20 and the rail 3, it is more preferable that the side roller 20 is located at the upper end of the rail 3 as shown in FIG. . Furthermore, the contact between the main body frame 2 and the rail 3 is prevented by the side roller 20 first contacting the rail 3. Thereby, damage or breakage of the main body frame 2 and the rail 3 can be prevented.

  Moreover, in this embodiment, since the side roller unit 4a is fastened between a pair of side walls which the holder 4b opposes, it is firmly fixed. Therefore, even if it hits the cargo 17 placed on the floor in the end portion of the rail 3 or in the raised state, it is not damaged.

  In the present embodiment, the side roller units 4 a are provided at both ends in the longitudinal direction of the main body frame 2. Thereby, even when the on-floor cargo transport apparatus 1 slides on the side wall of the rail 3, it is possible to travel more stably.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments and examples, and various design changes can be made as long as they are described in the claims. is there.

  In the above-described embodiment, the rail 3 has the width changing portion 3a at the center in the depth direction, and is described as being formed so that the lower portion is narrowed from the central portion to the upper portion from the central portion. The width between the inner peripheral surfaces may be constant.

  In the above-described embodiment, the guide unit 4 is described as being attached to each end face in the longitudinal direction of the main body frame 2, but is attached to only one end face in the longitudinal direction of the main body frame 2. It doesn't matter.

  In the above embodiment, the side roller 20 is described as being provided on the guide unit 4 attached to both end surfaces of the main body frame 2 in the longitudinal direction. The protruding side rollers 20 may be directly attached to both ends in the longitudinal direction of the main body frame 2.

  Moreover, in said embodiment, although the guide unit 4 is attached to the end plate 58 of the main body frame 2, you may attach the guide unit 4 to the side plate 53 or the top plate 2b, for example. The guide unit 4 may be attached to the end plate 58 and the side plate 53, the end plate 58 and the top plate 2b, the side plate 53 and the top plate 2b, or all of them.

  In the above embodiment, as shown in FIG. 6, the side roller unit may be attached by inserting the bolt 34 into the bolt hole 33 and the bolt hole 32 by further using the bolt 34.

1: Floor cargo transport device 2: Main body frame 4: Guide unit 4a: Side roller unit 4b: Holder 8: Link mechanism 11: Roller plate 20: Side roller 30: Cam mechanism

Claims (4)

A rental equipment for transporting goods on the floor used for loading and unloading cargo,
A roller plate having a plurality of traveling rollers and capable of traveling on a rail arranged along the floor surface;
A body frame attached to the roller plate and having a placement surface on which cargo is placed;
Provided between the roller plate and the main body frame, the main body frame is moved up and down between a lowered position where the main body frame is accommodated in the inner space of the rail and a raised position where the main body frame protrudes from the rail. An elevating mechanism;
With
A holder having at least one side wall parallel to the mounting surface is provided at one end of the main body frame,
A side roller unit having side rollers protruding on both sides in the width direction of the main body frame is fastened to the side wall of the holder. In the above-mentioned floor cargo transportation device according to claim 1,
The above-mentioned side roller unit is fastened to the above-mentioned side wall of the above-mentioned holder from the above-mentioned placing side, The cargo transportation device on the floor characterized by things. In the floor freight conveyance device according to claim 1 or 2,
The above-mentioned holder is formed in a U-shaped cross section, and the above-mentioned side roller unit is fastened between a pair of opposing side walls. In the above-mentioned floor freight conveyance device in any one of claims 1-3,
The above-described side roller unit is provided at each of both ends in the longitudinal direction of the main body frame, and is an on-floor cargo conveying device.

Images