KR102477309B1 - Carrier for loading and unloading cargo - Google Patents

Abstract

The present invention relates to a carrier for loading and unloading a cargo, comprising: a traveling cart including a frame, a traveling roll part and a supporting roll part, which are accommodated in a traveling groove on a bottom of a cargo loading space; a lifter installed on top of the traveling cart and having an ascending and descending beam and a rising block; and an operation part for connecting the traveling cart and the lifter, and lifting and lowering the lifter. The supporting roll part includes: a pair of separated plates fixed to the frame, separated by a certain interval from each other, and having a facing groove corresponding to a facing surface; a roll shaft having both ends inserted into the facing groove; an oilless bearing for supporting both ends of the roll shaft to be able to pivot; and a supporting roll composed of engineering plastics including MC nylon and supported on the roll shaft. The carrier for loading and unloading a cargo according to the present invention configured as described above prevents the rising block and the frame from being in contact with each other, thereby generating little noise during operation and dispensing with application of lubricant such as grease. Moreover, a ball bearing is used instead of a needle bearing, so even a cargo with a high load can be carried with no difficulty. In addition, the rising block alone can be replaced without overall disassembly, thereby facilitating maintenance and repairs greatly.

Description

Carrier for loading and unloading cargo {Carrier for loading and unloading cargo}

The present invention relates to a cargo carrier used when loading and unloading cargo, and more particularly, to a cargo loading and unloading carrier having low noise and wear during use and good load capacity.

There are various types of loading boxes of cargo trucks, and among them, the loading boxes of trucks have a box-shaped sealed structure to enable safer transport of cargo. The loading box of the truck takes the shape of a box and has a door at the rear end. The door is a hinged door that is opened when loading or unloading cargo.

However, when the length of the loading box is long back and forth, there is considerable difficulty in loading and unloading cargo. For example, when loading, when the forklift lifts the cargo to the entrance of the loading box (rear end of the loading box), the operator must push the cargo to move it to the front of the loading box. to be.

It is fortunate if the weight of the cargo is light, but if the weight is heavy, it is very difficult to load and unload the cargo by manpower.

In order to solve this problem, a bearing was installed on the bottom of the loading box. The bearing has a structure that can be moved up and down by operating a switch, and when transporting cargo, it rises and supports the cargo. However, these bearing-type devices have a disadvantage in that they have a complicated structure and are difficult to maintain when a failure occurs because they are built into the floor of a vehicle.

Accordingly, a portable and lightweight carrier 10 has been developed and used. As shown in FIGS. 1 and 2 , the carrier 10 is inserted into the bottom 103 of the loading box 101 of the cargo truck 100 and is installed and used only when loading and unloading.

The conventional carrier has the structure of FIGS. 2 and 3 , and is inserted into the running groove 104 formed on the bottom 103 of the loading box 101 . The carrier 10 is inserted into the driving groove 104, enters the lower portion of the cargo, and then rises to lift the cargo from the floor 103. The worker pushes and moves the cargo 110 in a state where the cargo 110 is floating from the floor 103 .

3A and 3B are drawings for explaining the configuration and problems of a conventional loading and unloading carrier, and FIG. 4A is a perspective view showing a part of the frame of FIG. 3A. In addition, FIG. 4b is a perspective view of the rising block shown in FIG. 3a, and FIG. 4c is a view showing the rising block of FIG. 5 mounted on a frame.

As shown, the conventional loading and unloading carrier 10 has a traveling cart 12, a lifter 14, and an operating unit 16.

The running carriage 12 has a pair of frames 12a extending in the longitudinal direction, a number of running rolls 12f and support rolls 12g. The traveling roll 12f is supported between the frames 12a by needle bearings, and rolls in a state in contact with the bottom surface portion 104a of the traveling groove 104. In addition, the support roll 12g is located higher than the running roll 12f, floats from the bottom surface portion 104a, and serves to support the rising block 14c in the direction of arrow b.

In addition, a number of running grooves 12b and roll shaft grooves 12c are formed on the inward surface of the frame 12a. The roll shaft groove 12c is a groove for accommodating and supporting the running roll 12f and the backing roll 12g along a roll shaft (no reference numeral). Also, as shown in FIG. 4C, the traveling groove 12b accommodates and supports the ball plunger 14f of the rising block 14c and guides the movement of the rising block 14c.

The lifter 14 has a lifting beam 14a and a number of rising blocks 14c. The elevating beam 14a is a U-shaped straight member extending in the longitudinal direction and open to the bottom.

The rising block 14c is a block-shaped member fixed to the lower surface of the elevating beam 14a, and has an inclined surface portion 14d and a roll contact surface portion 14e. The roll contact surface portion 14e is a curved surface supported by the support roll 12g.

The operating unit 16 serves to elevate the lifter 14, and includes a tilting block 17, a connecting arm 18, and a lever 19. The tilting block 17 is linked to the lifting beam 14a through the first pin 17a and to one end of the connecting arm 18 through the second pin 17c, and has a lever fitting groove 17e in the center. . The lever 19 is fitted into the lever fitting groove 17e. And, the other end of the connecting arm 18 is connected to the end of the frame 12a with a pin.

Therefore, when the lever 19 is inserted into the lever fitting groove 17e and rotated in the direction of the arrow a, the lifter 14 is pulled to the left in the drawing and each rising block 14c rides the support roll 12g do. The lifter 14 lifts the cargo 110 from the floor 103.

However, the conventional carrier 10 described above has a disadvantage in that it generates severe wear and noise during driving, and does not properly move up and down when foreign substances enter between the ball plunger 14f and the driving groove 12b. In addition, since the bearing supporting the traveling roll is a needle bearing, there is a problem that the needle bearing is broken or broken when the load of the cargo is heavy.

Korean Patent Registration No. 10-1598407 (pallet carrier)

The present invention was created to solve the above problems, and the object of the present invention is to provide a carrier for loading and unloading cargo that generates little noise during operation, does not require the application of lubricants such as grease, and can transport even heavy cargo without difficulty. there is.

In addition, another object of the present invention is to provide a carrier for loading and unloading cargo, which is easy to maintain because only the rising block can be replaced separately.

The carrier for loading and unloading cargo of the present invention as a means of solving the problems for achieving the above object is disposed to be able to travel in a linear driving groove provided on the floor of a cargo loading space, and includes a frame accommodated inside the driving groove. A traveling cart having a plurality of traveling rolls for supporting the running and a plurality of support rolls for receiving and transmitting the load of cargo to the frame; It is installed to be able to move up and down on the upper part of the traveling carriage, and is fixed to the lower part of the lifting beam, which protrudes and descends to the upper part of the running groove in an elevated state and is hidden in the running groove. A lifter having a plurality of rising blocks supported and maintaining the lifting state of the lifting beam; An operating unit connecting the traveling carriage and the lifter and elevating the lifter, and the support roll unit; A pair of spacer plates fixed to the frame, spaced apart at a certain interval, and having opposite grooves corresponding to each other on opposite surfaces, a roll shaft having both ends inserted into the opposite grooves, and an oil-less bearing supporting both ends of the roll shaft rotatably. And, it is made of engineering plastics containing MC nylon, and is provided with a support roll supported by the roll shaft.

In addition, the frame and the elevating beam are made of stainless steel.

In addition, the traveling roll unit; a traveling roll in contact with the bottom surface inside the traveling groove, a roll shaft having both ends fixed to the frame and serving as a traveling roll rotation shaft;

It is fixed to the roll shaft and includes a ball bearing rotatably supporting the traveling roll.

In addition, the rising block is accommodated between the spacer plates when the lifter descends to maintain a non-contact state with the frame, and has a roll contact surface on a bottom surface that is in contact with the support roll unit.

In addition, the spacer plate is made of engineering plastics containing MC nylon.

In addition, a buffer cover is laminated and fixed to the lower portion of the rising block.

In addition, the rising block is a hollow member having an internal space, and is connected to a strain gauge that measures the amount of elastic deformation of the rising block when a load of cargo is applied, and communication that transmits measurement data of the strain gauge to the outside. contains more modules.

In addition, a plurality of installation holes are formed through the elevating beam of the lifter, and the rising block is coupled and detachably coupled to the elevating beam in a state of being installed under the elevating beam through the installation holes.

Since the carrier for loading and unloading cargo of the present invention made as described above has no contact between the rising block and the frame, almost no noise is generated during operation, and the application of lubricants such as grease is unnecessary.

In addition, since ball bearings are used instead of needle bearings, heavy loads can be moved without difficulty with little force, and it is hygienic because it does not rust, so it can be used for food transportation.

In addition, even if it is not disassembled as a whole, only the rising block can be replaced separately, so maintenance is very easy.

1 is a diagram for explaining a method of using a general loading and unloading carrier.
FIG. 2 is a view showing a state in which a carrier is installed on the bottom of the loading box of FIG. 1 .
3A and 3B are views for explaining the configuration and problems of a conventional loading and unloading carrier.
Figure 4a is a perspective view showing a portion of the frame of Figure 3a.
Figure 4b is a perspective view of the rising block shown in Figure 3a.
Figure 4c is a view showing a state in which the rising block of Figure 5 is mounted on the frame.
5 is a view for explaining the configuration of a carrier for loading and unloading cargo according to an embodiment of the present invention.
6 and 7 are side views illustrating an operation method of the loading and unloading carrier of FIG. 5 .
8 is a plan view of a carrier for loading and unloading cargo according to an embodiment of the present invention.
9 to 11 are views showing modified examples of the rising block shown in FIG. 5 .

Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

5 is a view for explaining the configuration of a cargo loading and unloading carrier 30 according to an embodiment of the present invention, and FIGS. 6 and 7 are side views showing an operation method of the loading and unloading carrier of FIG. 5 . 8 is a plan view of a carrier for loading and unloading cargo according to an embodiment of the present invention.

The same reference numerals as the above reference numerals indicate the same members with the same functions.

As shown, the carrier 30 for loading and unloading cargo according to the present embodiment includes a traveling cart 32, a lifter 40, and an operating unit 16.

The assembly of the traveling carriage 32 and the lifter 40 is installed in the traveling groove 104 provided on the bottom 103 of the loading box 101. This carrier 30 is used only when loading and unloading cargo. That is, it is stored separately at normal times, and then taken out and mounted in the driving groove 104 when loading and unloading cargo. A user manipulates the carrier 30 using the lever 19 .

The traveling carriage 32 includes a frame 33, a traveling roll unit 34, and a support roll unit 35. The frame 33 is a structure composed of two parallel extension beams 33c and a spacing plate 33d, and is capable of linear motion along the longitudinal direction of the running groove 104. The travel cart 32 does not protrude upward from the travel groove 104 while being accommodated in the travel groove 104 . The spacing plate 33d is a member that keeps the extension beams 33c parallel.

The frame 33 may be made of stainless steel. For reference, in the past, since the frame itself was made of heavy cast iron, it was not easy to handle due to the heavy weight, and also had to be treated with anti-corrosion to prevent corrosion. However, since the rust preventive is a toxic substance, when transporting food with the carrier 30 treated with rust, the food may be contaminated by the rust preventive. Conventional carriers are unsuitable for use in transporting food.

The travel roll unit 34 supports the frame 33 so as to be able to travel, and includes a travel roll 34e, a roll shaft 34a, and a ball bearing 34c.

The traveling roll 34e is in contact with the bottom surface portion 104a inside the traveling groove, and is a wheel that rolls when the operator pushes the carrier 30 to move, and has a roll shaft 34a at the central axis.

The roll shaft 34a is fixed at both ends to the extension beam 33c of the frame and supports the running roll. A roll shaft groove 33a is provided on the inner surface of the extension beam 33c to support the roll shaft 34a. Both ends of the roll shaft 34a are fixed to the roll shaft groove 33a. The roll shaft 34a cannot rotate while being fixed to the roll shaft groove 33a.

In addition, the ball bearing 34c rotatably supports the running roll in a state fixed to the roll shaft 34a. When the traveling cart 32 travels, the roll shaft 34a does not rotate, but only the traveling roll 34e rotates. The ball bearing is a waterproof bearing with waterproof ability, which prevents foreign substances and moisture from penetrating, so it has a long life and enables cargo to be transported smoothly with small force.

As shown in FIG. 7, the support roll unit 35 supports the rising block 43 and transmits the load of the cargo transmitted through the rising block 43 to the frame. The support roll unit 35 has a spacer plate 36, a roll shaft 35b, an oilless bearing 35c, and a support roll 35a.

The spacer plate 36 is a plate-like member of a certain thickness fixed to the inward side of the extension beam 33c of the frame. The spacer plate 36 is located on the opposite side with the backing roll 35a interposed therebetween and faces each other. In addition, opposing grooves 36a are formed in the spacer plate 36 .

The opposing groove 36a is a groove having a certain diameter and accommodates the end of the roll shaft 35b and the oilless bearing 35c. The spacer plate 36 may have the same material as the extension beam 33c or may be made of engineering plastics including MC nylon. By applying the spacer plate 36 in this way, when the lifter 40 descends, a non-contact state between the rising block 43 and the extension beam 33c is maintained.

The roll shaft 35b is a shaft member rotatably supported by an oilless bearing 35c with both ends inserted into the opposing grooves 36a, and supports the backing roll 35a.

The support roll 35a is a member made of engineering plastic containing MC nylon and supports a rising block 43 to be described later.

On the other hand, the lifter 40 is a member that is installed to be able to move up and down on the upper part of the traveling carriage 32, protrudes to the upper part of the traveling groove 104 in an elevated state, and is concealed within the traveling groove by descending. That is, the cargo 110 is raised from the lower part of the cargo 110 to be transported and the cargo 110 is lifted from the floor 103, or the cargo 110 is lowered to the floor by descending. The lifter 40 operates when the lever 19 of the operation unit 16 is moved without moving up and down by itself. FIG. 6 shows a state in which the lifter 40 is lowered, and FIG. 7 shows a state in which the lifter is raised.

The lifter 40 is composed of a straight elevating beam 41 and a plurality of rising blocks 43. The elevating beam 41 is a straight member that is open to the bottom and has a U-shaped cross-sectional shape. The elevating beam 41 has the same material as the frame 33 . When the elevating beam 41 is completely lowered, the lower end of the elevating beam 41 may come into contact with the bottom surface portion 104a of the running groove 104 .

The rising block 43 is a block-shaped member fixed to the lower portion of the lifting beam 41, and has an inclined surface portion 43a and a roll contact surface portion 43c. The inclined surface portion 43a comes into contact with the support roll 35a when the lifter 40 is completely lowered, and moves upward along the outer circumferential surface of the support roll 35a when the lift beam 41 is pulled in the direction of arrow k. .

The roll contact surface portion 43c is a groove having the same curvature as the outer circumferential surface of the support roll 35a, and as shown in FIG. 7, the support roll 35a Adhere to the outer circumference of The rising block 43 is supported by the supporting roll 35a to maintain the lifting state of the lifting beam 41. Even if the support roll 35a is pressed by the rising block 43, since the support roll 35a floats from the bottom surface portion 104a anyway, it does not affect the movement of the carrier 30.

A coupling method of the rising block 43 to the elevating beam 41 may be a welding or bolting coupling.

The operating unit 16 connects the traveling carriage and the lifter and lifts the lifter 40, and includes a tilting block 17, a connecting arm 18, and a lever 19.

The tilting block 17 is a member having a lever fitting groove 17e into which the lever 19 is inserted, and is connected to the elevating beam 41 through a first pin 17a, and a connecting arm through a second pin 17c. Linked to one end of (18). The connecting arm 18 is a straight member, and the other end is connected to the frame 33 through a connecting pin 18a.

Therefore, when the lever 19 is rotated in the direction of the arrow g in FIG. 7 with the end of the lever 19 inserted into the lever fitting groove 17e, the lifting beam 41 moves in the direction of the arrow m, and the rising block ( 43) rides on the top of the support roll 35a. When the lever 19 is moved in the opposite direction, the rising block 43 returns to its original position. As a result, of course, the elevating beam 41 descends.

The operator lifts the cargo 110 by holding the lever 19 while the carrier 30 is inserted into the lower portion of the cargo 110, pushes the cargo to a desired point, and reverses the lever 19. Rotate in the direction to lay down the cargo. The method of using the carrier 30 of this embodiment is the same as that of the conventional carrier.

9 to 11 are views showing modified examples of the rising block 43 shown in FIG. 5 .

The rising block 43 shown in FIG. 9 is composed of a block body 44a and a buffer cover 44c. The buffer cover 44c is a plate-like member of a certain thickness made of engineering plastic containing MC nylon, and prevents wear of the block body 44a. An inclined surface portion 44f and a roll contact surface portion 44e are also formed in the buffer cover 44c.

In particular, the buffer cover 44c is replaceable. For example, when the shock absorber cover 44c is worn out, it can be replaced with a new one. By applying the buffer cover 44c interchangeably, the height of the lifting beam 41 in the raised state is always accurate.

The rising block 43 of FIG. 10 takes a hollow shape. That is, the inner space 45a is provided in the rising block 43 . In addition, a strain gauge 45m is accommodated in the inner space 45a. The strain gauge 45m measures the amount of elastic deformation of the rising block 43 when a load is applied to the load. The greater the elastic deformation, the greater the load.

The measurement data of the strain gauge 45m is transmitted to the communication module 45n. The communication module 45n is installed under the elevating beam 41 and transmits the measurement data of the strain gauge to the outside. For example, load data is sent to the operator's portable terminal. The operator can grasp the load information of the cargo as a reference through the terminal.

On the other hand, the rising block 43 shown in FIG. 11 is detachably attached to the installation hole 41c formed in the lifting beam 41 of the lifter. The installation hole 41c is a square through-hole formed in the elevating beam 41 and has a support receiving groove 41d in the rim portion. A bolt hole 41e is formed through the bottom surface of the support receiving groove 41d.

In addition, a hooking portion 46e is formed on the outer edge of the upper end of the rising block 43 . The hooking portion 46e has a bolt groove 46f as an extension spanning the support receiving groove 41d. The bolt hole 46f is a groove in which the hexagonal head of the bolt is accommodated.

After passing the rising block 43 downward through the installation hole 41c to align the hooking part 46e with the support receiving groove 41d, and then bolting the hooking part 46e and the lifting beam 41 together, The binding of the rising block 43 to the is completed. Naturally, the rising block 43 can be separated from the elevating beam 41 by dismantling the bolting coupling. Therefore, when the rising block 43 needs to be replaced, the rising block 43 can be replaced without necessarily overturning the elevating beam 41 .

In the above, the present invention has been described in detail through specific embodiments, but the present invention is not limited to the above embodiments, and various modifications are possible by those skilled in the art within the scope of the technical idea of the present invention.

10: carrier 12: running truck 12a: frame
12b: running groove 12c: roll shaft groove 12f: running roll
12g: support roll 14: lifter 14a: elevating beam
14c: Rising block 14d: Inclined surface portion 14e: Roll contact surface portion
14f: ball plunger 16: operating unit 17: tilting block
17a: first pin 17c: second pin 17e: lever fitting groove
18: connecting arm 18a: connecting pin 19: lever
30: carrier 32: running truck 33: frame
33a: roll shaft groove 33c: extension beam 33d: spacing plate
34: running roll unit 34a: roll shaft 34c: ball bearing
34e: Running roll 35: Backing roll part 35a: Backing roll
35b: roll shaft 35c: oilless bearing 36: spacing plate
36a: facing groove 40: lifter 41: lifting beam
41c: installation hole 41d: support receiving groove 41e: bolt hole
43: rising block 43a: inclined surface portion 43c: roll contact surface portion
44a: block body 44c: buffer cover 44e: roll contact surface
44f: slope part 45a: inner space 45m: strain gauge
45n: communication module 46e: hanging part 46f: bolt groove
100: cargo truck 101: loading box 103: floor
104: driving groove 104a: bottom part 110: cargo

Claims (8)

It is arranged to be able to run in the linear driving groove provided on the floor of the cargo loading space, and includes a frame accommodated inside the driving groove, a plurality of driving roll units that support the frame to be able to run, and a plurality of driving rolls that receive the load of the cargo and transmit it to the frame. A traveling cart having a supporting roll of the;
It is installed to be able to move up and down on the upper part of the traveling carriage, and is fixed to the lower part of the lifting beam, which protrudes and descends to the upper part of the running groove in an elevated state and is hidden in the running groove. A lifter having a plurality of rising blocks supported and maintaining the lifting state of the lifting beam;
An operation unit connecting the travel cart and the lifter and lifting the lifter,
The support roll unit;
A pair of spacer plates fixed to the frame, spaced apart at a predetermined interval, and having mutually corresponding opposing grooves on opposite surfaces;
A roll shaft having both ends inserted into opposing grooves;
An oilless bearing that supports both ends of the roll shaft rotatably,
Made of engineering plastics containing MC nylon and having a support roll supported by a roll shaft,
Carrier for loading and unloading cargo. According to claim 1,
The frame and the elevating beam are made of stainless steel,
Carrier for loading and unloading cargo. According to claim 1,
The driving roll unit;
A traveling roll in contact with the bottom surface inside the traveling groove;
A roll shaft having both ends fixed to the frame and serving as a driving roll rotation shaft;
It is fixed to the roll shaft and includes a ball bearing rotatably supporting the traveling roll.
Carrier for loading and unloading cargo. According to claim 1,
The rising block,
When the lifter descends, it is accommodated between the spacer plates to maintain a non-contact state with the frame,
The bottom surface has a roll contact surface portion in contact with the backing roll portion,
Carrier for loading and unloading cargo. According to claim 4,
The spacer plate,
Made of engineering plastics containing MC nylon,
Carrier for loading and unloading cargo. According to claim 4,
A buffer cover is laminated and fixed to the lower part of the rising block,
Carrier for loading and unloading cargo. According to claim 4,
The rising block is a hollow member having an inner space,
A strain gauge for measuring the amount of elastic deformation of the rising block when a load is applied;
Further comprising a communication module connected to the strain gauge and transmitting measurement data of the strain gauge to the outside.
Carrier for loading and unloading cargo. According to claim 4,
A plurality of installation holes are formed through the elevating beam of the lifter,
The rising block is detachably coupled and fixed to the elevating beam in a state installed at the lower portion of the elevating beam through the installation hole,
Carrier for loading and unloading cargo.

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