WO2007139298A1

WO2007139298A1 - Water-tub carrier having counterflow prevention materials

Info

Publication number: WO2007139298A1
Application number: PCT/KR2007/002414
Authority: WO
Inventors: Tae-Ho Kim
Original assignee: Hbl Inc.
Priority date: 2006-05-26
Filing date: 2007-05-17
Publication date: 2007-12-06
Also published as: KR100622083B1

Abstract

A water-tub carrier equipped with a counterflow prevention material, enables a worker to easily load and unload a number of water tubs along a brief traffic line without interference among the tubs, thereby promoting economized, simplified, and automated physical distribution and highly saving the worker's labor during delivery. The water- tub carrier comprises a base frame horizontally mounted, a plurality of sidewall frames mounted vertically to the base frame and arranged forward and backward at intervals, thereby forming a receiving space therebetween to receive water tubs, and the counterflow prevention material mounted to the sidewall frames of the front side, directing each other in pairs, to be rotated by the water tub being pushed in the receiving space and then returned to the initial position, thereby preventing separation of the received water tub.

Description

WATER-TUB CARRIER HAVING COUNTERFLOW PREVENTION MATERIALS

Technical Field

[1] The present invention relates to a water- tub carrier, more particularly to a water- tub carrier equipped with a counterflow prevention material, enabling a worker to easily input and withdraw a number of water tubs along a brief traffic line without interference among the tubs, thereby promoting economized, simplified, and automated physical distribution and highly saving the worker's labor during delivery. Background Art

[2] In general, spring water suppliers utilize a water tub for convenient preservation and transportation to consumption places.

[3] By using the water tub which usually has about 18-liter capacity, the spring water can be transported by regular quantity and in good condition as insulated from the external environment. The water tub is also convenient in that preservation of the spring water can be achieved during consumption without requiring a dedicated container at each consumption place such as home.

[4] Conventionally, the water tub has a cylindrical body with a relatively small entrance. Since such water tubs are hard to be piled in multiple layers, a cubic case has been dedicatedly used for piling the water tubs. However, the case also induces several problems in distribution as follows.

[5] First, in order to load a number of water tubs received in the cases to a truck, the respective cases need to be loaded sequentially to a pallet one by one. This complicated and primitive method not only requires expensive equipment such as a robot arm but also deteriorates efficiency of the distribution.

[6] Although loading of the pallets having the water tubs to the truck can be easily performed by a forklift, it is very severe for a worker to deliver the water tubs to the respective consumption places in person. More specifically, withdrawal of a water tub piled on an uppermost layer is relatively easy. However, among a plurality of the water tubs even including empty tubs, when withdrawal of a lower-layer water tub is required, upper-layer water tubs should be removed once and relocated. This causes waste of labor and time. Furthermore, stoppage time of the truck is thus elongated, thereby causing traffic congestion.

[7] As aforementioned, the conventional system deteriorates efficiency of the whole distribution process from the supplier to the consumption places, accordingly inducing considerable expenses. Disclosure of Invention

Technical Problem

[8] Therefore, the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a water-tub carrier equipped with a counterflow prevention material, enabling a worker to easily input and withdraw a number of water tubs without interference. Technical Solution

[9] According to an aspect of the present invention, there is provided a water-tub carrier equipped with a counterflow prevention material, comprising a base frame horizontally mounted; a plurality of sidewall frames mounted vertically to the base frame and arranged forward and backward at intervals, thereby forming a receiving space therebetween to receive water tubs; and the counterflow prevention material mounted to the sidewall frames of the front side, directing each other in pairs, to be rotated by the water tub being pushed in the receiving space and then returned to the initial position, thereby preventing separation of the received water tub.

[10] The coutnerflow prevention material comprises a vertical bar; a rotative bar mounted vertically to the vertical bar; a joint unit connecting the rotative bar rotatably by a limited angle to the left and the right with respect to the vertical bar; and a torsion spring mounted to and supported by the vertical bar to offer resilient force for returning the rotative bar to the initial position.

[11] The joint unit comprises a connection piece consisting of a vertical bar insertion ring penetrated by the vertical bar to be rotatably fit around the vertical bar and having a cutout part formed along outer circumference thereof, and a rotative bar insertion ring extended horizontally from the vertical bar insertion ring and fit around an end of the rotative bar; a restriction pin fastened to the vertical bar through a cutout part to restrict rotational angles of the connection pieces and the rotative bar; and a friction relief ring made of synthetic resin, mounted between the vertical bar and the vertical bar insertion ring, and rotated along with the vertical bar insertion ring, thereby preventing contact between the vertical bar and the vertical bar insertion ring.

[12] In the joint unit, the vertical bar insertion ring and the rotative bar insertion ring are divided into two parts in a longitudinal direction, the divided parts of the rotative bar insertion ring are connected with each other by a fastening bolt and a nut, and the divided parts of the vertical bar insertion ring include an engaging recess and an engaging projection, respectively, on the opposite sides to the rotative bar insertion ring and are connected with each other by the engaging recess and the engaging projection.

[13] The base frame comprises multiple layers in a vertical direction. [14] The base frame includes a roller unit for sliding the water tub thereon forward and backward, the roller unit comprising a main frame mounted to the base frame forward and backward and including a bottom side and both sidewalls; and a plurality of rollers arranged in forward and backward rows between the sidewalls of the main frame to slidably support the water tub.

[15] Additionally, a moving caster and an extendible and contractible strut are mounted to four lower corners of the base frame in a vertical direction.

[16] The strut is mounted to the lower corners of the base frame, and a mounting piece is mounted to the uppermost corners of the sidewall frame to correspond to the strut.

[17] An ad plate is further comprised to cover the outside of the sidewall frames which are arranged at the outermost side, and the upper side of the sidewall frames.

[18] The base frame has a lattice structure comprising anteroposterior horizontal bars and lateral horizontal bars, and the sidewall frame has a lattice structure comprising the anteroposterior horizontal bars and vertical bars.

[19] The water- tub carrier further comprises a separation prevention material movably mounted across the sidewall frames of the front side to selectively obstruct an entrance of the receiving space according to the position thereof.

[20] The separation prevention material comprises a pair of static pieces respectively fixed to the sidewall frames dispose at both outer sides among the plurality of the sidewall frames, and having a displacement slit comprising an upper mounting part formed at an upper part thereof, a lower mounting part formed at a lower part, and a displacement part linking the upper to the lower mounting part; and a blocking bar movably connected in the displacement slits of the static pieces by both ends thereof, spanning the sidewall frames of the front side, and obstructing the entrance of the receiving space when disposed in the upper mounting part so that separation of the water tubs is prevented and releasing the obstruction when disposed in the lower mounting part.

[21] A water- tub carrier according to another embodiment of the present invention, comprises a base frame horizontally mounted; a plurality of sidewall frames mounted vertically to the base frame and arranged forward and backward at intervals, thereby forming a receiving space therebetween to receive water tubs; the counterflow prevention material mounted direct each other in pairs, to be rotated by the water tub being pushed the receiving space and then returned to the initial position to thereby prevent separation of the received water tub, and comprising a vertical bar, a rotative bar mounted vertically to the vertical bar, a joint unit connecting the rotative bar rotatably by a limited angle to the left and the right with respect to the vertical bar, and a torsion spring mounted to and supported by the vertical bar to offer resilient force for returning the rotative bar to the initial position; and a separation prevention bar comprising a pair of static pieces respectively fixed to the sidewall frames dispose at both outer sides among the plurality of the sidewall frames and having a displacement slit comprising an upper mounting part formed at an upper part thereof, a lower mounting part formed at a lower part and a displacement part linking the upper to the lower mounting part, and a blocking bar movably connected in the displacement slits of the static pieces by both ends thereof, spanning the sidewall frames of the front side, and obstructing the entrance of the receiving space when disposed in the upper mounting part so that separation of the water tubs is prevented and releasing the obstruction when disposed in the lower mounting part.

Advantageous Effects

[22] With use of a water-tub carrier with a counterflow prevention material according to the present invention, input and withdrawal of water tubs can be very simply performed, thereby promoting automated physical distribution without any expensive equipment or complex processes. [23] In addition, since input and withdrawal of the water tubs can be performed almost without interference among the water tubs, worker's labor can be remarkably saved when delivering spring water by the water tub using a truck. [24] According to the present invention, leakage of water can be prevented because the water tubs are kept erect rather than laid during the input and withdrawal. [25] Additionally, advertisement effect can be created by an aluminum ad plate enclosing the outside of the water-tub carrier. [26] The aluminum ad plate even prevents generation of green algae by sunlight and entry of dust and rainwater. Therefore, freshness of the spring water can be maintained for longer. [27] Furthermore, a separation prevention material is provided to doubly secure the water tub against separation, together with the counterflow prevention material.

Brief Description of the Drawings [28] The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which:

[29] FIG. 1 and FIG 2 show an embodiment of the present invention in use;

[30] FIG. 3 is a perspective view for explaining the embodiment of the present invention; [31] FIG. 4 is a perspective view of a counterflow prevention material according to the embodiment of the present invention; [32] FIG. 5 is an exploded perspective view of the counterflow prevention material according to the embodiment of the present invention; [33] FIGS. 6 through 8 are a series of reference views for explaining the operation of the counterflow prevention material according to the embodiment of the present invention;

[34] FIG. 9 is a reference view illustrating an ad plate according to the embodiment of the present invention; and

[35] FIG. 10 and FIG. 11 are perspective views illustrating the structure of a water-tub carrier according to another embodiment of the present invention. Best Mode for Carrying Out the Invention

[36] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[37] FIG. 1 and FIG. 2 are views showing an embodiment of the present invention in use.

[38] Referring to FIG. 1, basically, a water-tub carrier 100 is structured so that a number of water tubs W can be received as erected in rows and columns without interfering with one another, and a worker can conveniently input and withdraw the water tubs W at any time. Especially, as shown in FIG. 2, the water tubs W can be loaded to a truck as they are, that is, in an erect posture rather than a laid posture. This improves worker's convenience since the worker can bear the water tub W on his/her shoulder simply by grabbing the periphery of an entrance Wl of the water tub W without hindrance by a sidewall D of a cargo hold of the truck. Also, leakage of water from the water tub W can be securely prevented.

[39] In addition, the water- tub carrier 100 of the present invention is equipped with a counterflow prevention material 130. Therefore, the water tubs W can be put in according to a transfer line of a conveyer by merely being pushed in from the front side of the water-tub carrier. Consequently, automated physical distribution can be accomplished at moderate cost without requiring complex processes and expensive equipment such as a robot arm.

[40] On the whole, efficiency of the distribution from the supplier to the consumption places can be remarkably improved.

[41] Hereinafter, the structure of the water- tub carrier 100 will be described in greater detail.

[42] FIG. 3 is a perspective view of the embodiment of the present invention. FIG. 4 is a perspective view of the counterflow prevention material of the embodiment of the present invention. FIG. 5 is an exploded perspective view of the counterflow prevention material. FIGS. 6 through 8 are a series of reference views for explaining the operation of the counterflow prevention material of the embodiment of the present invention.

[43] As shown in the drawings, the water-tub carrier comprises a base frame 110, a sidewall frame 120, and a counterflow prevention material 130. The base frame comprises anteroposterior horizontal bars 12 IA, lateral horizontal bars 121C and vertical bars 12 IB, constituting the simple cubic lattice. The sidewall frame 120 comprises the anteroposterior horizontal bars 12 IA and the vertical bars 12 IB constituting a lattice together. The counterflow prevention material 130 functions concerning withdrawal and reception of the water tub. By having the counterflow prevention material 130, the water- tub carrier is capable of stably receiving the water tubs that are merely pushed in from the front by a transfer device such as a conveyer. Accordingly, a number of the water tubs can be conveniently received without requiring other expensive equipment such as the robot arm additionally to the conventional conveyer.

[44] The components of the water-tub carrier of the present invention will now be described in greater detail, with special regard to the counterflow prevention material 130.

[45] Referring to FIG. 3, the counterflow prevention material 130 is mounted to the sidewall frames 120 arranged in the front side. More particularly, the counterflow prevention material 130 is structured to allow only input of the water tub into a receiving space S formed among the sidewall frames 120 while preventing backward movement and separation of the input water tub. For this purpose, a pair of the counterflow prevention materials 130 are mounted on both sides of the receiving space S. The counterflow prevention material 130 comprises the vertical bar 12 IB, a rotative bar 133, a joint unit 135, and a torsion spring 138. The above components of the counterflow prevention material 130 will be described more specifically in the following.

[46] The vertical bars 12 IB of the counterflow prevention material 130 also function as the vertical bars 12 IB at the front side of the sidewall frame 120. Alternatively, dedicated vertical bars may be added to the front side of the sidewall frame 120.

[47] The rotative bar 133 of the counterflow prevention material 130 is rotatably mounted to the vertical bar 121B through the joint unit 135 in a horizontal posture. The rotative bar can be rotated within a limited range. As shown in FIGS. 6 and 7, the rotative bar 133 is rotated backward by contact with the water tub W being put in from the front. After the water tub W is completely put in, the rotative bar 133 returns to the initial position by resilient force of the torsion spring 138 as shown in FIG. 8. The returned rotative bar 133 obstructs the front side of the input water tub W, thereby preventing separation of the water tub W. More specifically, the rotatve bar 133 can be rotated only backward from the initial position by a predetermined limited angle and returned by the torsion spring 138, but cannot in the opposite direction from the initial position. Such limited rotation of the rotative bar 133 is performed by the joint unit 135 which will be explained hereinafter.

[48] The joint unit 135 is provided to connect the rotative bar 133 to be rotatable to the left and the right with respect to the vertical bar 121B. To this end, the joint unit 135 comprises connection pieces 135 A and 135B, a restriction pin 136, and a friction relief ring 139. More specifically, one of the connection pieces 135 A and 135B is a vertical bar insertion ring 135 A and the other is a rotative bar insertion ring 135B. The vertical bar insertion ring 135A is fit around the vertical bar 121B to be rotatable in a horizontal direction. The rotative bar insertion ring 135B is extended horizontally from the vertical bar insertion ring 135A and fit around an end of the rotative bar 133. As shown in FIG. 5, the vertical bar insertion ring 135A and the rotative bar insertion ring 135B are divided into two parts in a longitudinal direction. The divided parts of the rotative bar insertion ring 135B are connected with each other by a fastening bolt 137 A and a nut 137B. The divided parts 135A- 1 and 135A-2 of the vertical bar insertion ring 135 A include an engaging recess 135A-3 and an engaging projection 135A-4, respectively, on the opposite sides to the rotative bar insertion ring 135B, and are connected with each other by the engaging recess 135A-3 and the engaging projection 135A-4 (area "A" in FIG. 4). The engaging recess 135A-3 and the engaging projection 135A-4 are coupled with each other like a zipper. As long as the bolt 137 A and the nut 137B connecting the parts of the rotative bar insertion ring 135B are securely engaged, the engaging recess 135A-3 and the engaging projection 135A-4 maintains the engagement with each other. The restriction pin 136, penetrating a cutout part 135C, is fastened to the vertical bar 12 IB so as to restrict rotational angles of the connection pieces 135A and 135B, and the rotative bar 133. The rotational angles of the connection pieces 135 A and 135B and the rotative bar 133 are determined by a cut degree of the cutout part 135C in a circumferential direction of the vertical bar insertion ring 135 A. In this embodiment, rotation of the connection pieces 135 A and 135B and the rotative bar 133 is allowed by approximately 60°. The friction relief ring 139 is disposed between the vertical bar 121B and the vertical bar insertion ring 135A and rotated together with the vertical bar insertion ring 135 A, thereby reducing contact friction between the vertical bar 121B and the vertical bar insertion ring 135A. In order to minimize contact friction with the vertical bar 12 IB, the friction relief ring 139 is made of synthetic resin such as polyethylene.

[49] The torsion spring 138 of the counterflow prevention material 130 is supported by the vertical bar 12 IB or the horizontal bar 12 IA disposed nearby to supply resilient force to the rotative bar 133, so that the rotative bar 133 tends to return to the initial position when rotated. For this purpose, a rolled portion of the torsion spring 138 is fit around outer circumference of the vertical bar 12 IB. One of both ends of the torsion spring 138 is supported by the rotative bar 133, and the other end by the vertical bar 121B or the nearby anteroposterior horizontal bar 121A. Thus, the torsion spring 138 is capable of continuously supplying the resilient force for biasing the rotated rotative bar 133 to the initial position.

[50] The base frame 110 upholds a lower part of the water tub. For this, the base frame

110 comprises the anteroposterior horizontal bars 12 IA and the lateral horizontal bars 121C formed as a hollow pipe. A reinforcement steel frame may be additionally mounted to a lower part of the base frame 110, in order to more securely support the water tub enduring the weight of the water tub. Alternatively, as shown in the drawings, the base frame 110 can be supported by a pallet P. The pallet P is used for loading and unloading of the whole water-tub carrier with respect to the truck.

[51] The base frame 110 is equipped with a roller unit 140 for slidably supporting the water tub. The roller unit 140 comprises a main frame 141 mounted to the base frame 110 forward and backward and consisting of a bottom side and both sidewalls, and a plurality of rollers 143 arranged in forward and backward rows between the sidewalls of the main frame to slidably support the water tub. If a plurality of the base frames 110 are provided in multiple layers, a greater number of water tubs can be received in multiple layers without interference. In this case, a sidewall frame 120 is further mounted, being erected on the base frame 110.

[52] More specifically, a plurality of the sidewall frames 120 are arranged forward and backward at intervals and mounted vertically to the base frame 110. Therefore, the receiving space S is formed for receiving the water tub put in between the sidewall frames 120. The sidewall frame 120 is formed by connecting a plurality of the anteroposterior horizontal bars 12 IA and the vertical bars 12 IB having a hollow pipe form, in a lattice structure. Such a lattice structure reduces the whole weight thereof and facilitates withdrawal of the water tub.

[53] The sidewall frames 120 are distanced by an interval for easily passing a row of the water tubs therethrough. In the drawings, respectively four sidewall frames 120 are mounted on each layer, thereby forming three receiving spaces S. Alternatively, the interval between the sidewall frames 120 can be formed to allow two rows of water tubs. In this case, a horizontal guide bar may be mounted in the middle of the receiving space S along a forward and backward direction.

[54] In addition, a rear side support bar 121D is mounted across the sidewall frames 120 of the rear side of the water- tub carrier. The rear side support bar 12 ID is disposed at a height near the lower part of the water tub, as long as it can prevent backward separation of the received water tubs, so that withdrawal of the received water tub by the worker is not obstructed by the rear side support bar 121D.

[55] The water-tub carrier according to the present invention has a structure for superposition to be carried in multiple layers. For this, a mounting piece 150 is formed at each uppermost corner of the water- tub carrier. The mounting piece 150 comprising a bottom side and a sidewall 153 vertically formed to the bottom side 151, helps stably seat thereon four corners of the pallet P or four lowermost corners of another water-tub carrier. As a consequence, more water tubs can be carried at a time by superposing the water-tub carriers in multiple layers as long as capacity of the truck allows.

[56] A caster (not shown) can be mounted to four lower corners of the base frame 110 for rolling on the ground surface. Additionally, an extendible and contractible strut (not shown) may be mounted. The structure of a hydraulic jack can be adopted for the extendible and contractible structure. When the caster is used for carriage, the strut is contracted so that the caster reaches the ground surface. When the base frame 110 needs stable support, on the other hand, the strut is extended up to the ground surface. As long as the strut is completely received in the mounting piece 150, superposition of the water-tub carriers will not be disturbed in spite of existence of the extendible and contractible strut.

[57] FIG. 9 is a reference view for illustrating an ad plate according to the embodiment of the present invention.

[58] As shown in FIG. 9, the water-tub carrier according to the embodiment of the present invention may further comprise an ad plate surrounding the sidewall frame 120. The ad plate comprises left and right pieces 161 and 163 covering the sidewall frames 120 which are arranged in the outermost side, and an upper piece 165 covering the upper side of the water-tub carrier. Various advertising illustration and words may be printed on the ad plate. According to the embodiment of the present invention, especially, the pieces of the ad plate are connected to each other by puzzle fit. Therefore, a huge advertisement can be achieved using the puzzle fit in a large- capacity truck capable of loading a plurality of the water- tub carriers.

[59] Moreover, the ad plate prevents generation of green algae by sunlight and entry of foreign substances such as dust or rainwater, thereby freshly keeping the spring water longer. Aluminum is preferable for the material of the ad plate since being lightweight, corrosion-resistant, and inexpensive.

[60] Hereinafter, the operations of the water-tub carrier with the counterflow prevention material will be described in detail based on the accompanying drawings.

[61] Loading of the water tub W using the water- tub carrier according to the embodiment of the present invention is performed as follows.

[62] The conveyer (not shown) is simply connected to the front side of the receiving space S formed in the water-tub carrier and then operated to transfer a new water tub W filled with water. The conveyer has the structure corresponding to reception rows of the water tub W. For example, since the water-tub carrier of the present embodiment shown in FIG. 2 consists of two layers with three rows, the conveyers are grouped by three to transfer the water tubs W by three rows. The conveyers are separately mounted to each layer of the water-tub carrier. Input of the water tubs W is performed sequentially from the first layer to the second layer.

[63] While the new water tubs W are thus being transferred and put in the receiving space S of the water- tub carrier, the rotative bar 133 of the counterflow prevention material is rotated backward by contact with the water tubs W, thereby letting the water tubs W into the receiving space S.

[64] Next, when input of the water tubs W into the receiving space S is completed, the rotative bar 133 is returned to its initial position by resilient force of the torsion spring 138, thereby obstructing the front side of the receiving space S. Because the returned rotative bar 133 is not rotated in the opposite direction, backward movement and undesired separation of the received water tubs W can be effectively prevented.

[65] At the rear side of the water-tub carrier, the rear side support bar 121D mounted across the receiving space S prevents backward separation of the water tub W.

[66] After the receiving space S is filled with the water tubs W, the pallet P is raised by the forklift and the whole water-tub carrier is loaded to the truck. As described so far, the water-tub carrier according to the embodiment of the present invention is capable of conveniently performing automated distribution of the water tubs W, without requiring complex processes or expensive equipment such as the robot arm.

[67] The water tubs W delivered by the truck to the respective consumption places can be withdrawn in a simple way by the worker. Also, the worker can easily input a wasted water tub W back to the water-tub carrier. For this, the worker withdraws the new water tub W from the rear side of the receiving space S by slantingly lifting the new water tub W, and pushes the wasted water tub W from the front side of the water- tub carrier. Therefore, the water tubs W on the same row are pushed back, filling the rear vacancy of the receiving space S to be withdrawn next. Here, the water tubs W are smoothly slid owing to the rollers 143 mounted to the base frame 110, thereby saving the worker's labor.

[68] Instead of following the above method, surely, the worker can easily input and withdraw the water tub W through the sidewall frame 120 having the lattice structure or through the front and rear sides. This method is convenient because interference among the water tubs W is not caused.

[69] As described above, the water-tub carrier according to the embodiment of the present invention considerably improves convenience of physical distribution from the spring water supplier to the respective consumption places. Especially when delivering the spring water with the truck, the worker's convenience will be improved more remarkably. Mode for the Invention

[70] FIGS. 10 and 11 are perspective views for explaining the structure of another embodiment of the present invention.

[71] As shown in the drawings, a water- tub carrier according to another embodiment of the present invention further comprises a separation prevention material 180 that selectively obstructs an entrance of the receiving space S to doubly prevent separation of the water tub W in cooperation with the counterflow prevention material 130. The separation prevention material 180 comprises a pair of static pieces 181 fixed to the sidewall frame 120, and a blocking bar 183 movably connected to the static pieces 181.

[72] The static pieces 181 are fixed respectively to the sidewall frames 120 disposed at both outer sides among the plurality of the sidewall frames 120. The static pieces 181 respectively have a displacement slit 182. The displacement slit 182 comprises an upper mounting part 182A formed at an upper part thereof, a lower mounting part 182B formed at a lower part, and a displacement part 182C linking the upper and the lower mounting part 182A and 182B to each other. In other words, the displacement slit 182 is similar to a "7" shape.

[73] The blocking bar 183 is connected movably in the displacement slits 182 of the static pieces 181 by both ends thereof, spanning the sidewall frames 120 of the front side. When the both ends of the blocking bar 183 are disposed at the upper mounting part 182A of the displacement slit 182, the entrance of the receiving space S is obstructed so that the water tub W cannot be separated. When the both ends are disposed at the lower mounting part 182B, the obstruction is released. FIG. 10 shows the blocking bar 183 obstructing the entrance of the receiving space S. FIG. 11 shows the blocking bar 183 disposed under the entrance of the receiving space S so that the entrance is not obstructed. In FIGS. 10 and 11, a sliding pin 184A that smoothly slides along the displacement slit 182 is further included for more favorable operation. In addition, the sliding pin 184A and the ends of the blocking bar 183 are connected by a link 184B and a connection pin 184C.

[74] Even when the water tub W is suddenly shoved with great force by accident, the above-structured separation prevention material 180 is effective in preventing the water tub W from being separated out of the counterflow prevention material 130.

[75] While the invention has been shown and described with reference to certain embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Industrial Applicability

[76] A water-tub carrier equipped with a counterflow prevention material according to an embodiment of the present invention is capable of promoting automated physical distribution without expensive equipment or complex processes, by simplifying input and withdrawal of water tubs. Consequently, efficiency of the physical distribution can be much improved, thereby considerably saving the cost.

Claims

[1] A water- tub carrier equipped with a counterflow prevention material, comprising: a base frame horizontally mounted; a plurality of sidewall frames mounted vertically to the base frame and arranged forward and backward at intervals, thereby forming a receiving space therebetween to receive water tubs; and the counterflow prevention material mounted to the sidewall frames of the front side, directing each other in pairs, to be rotated by the water tub being pushed in the receiving space and then returned to the initial position, thereby preventing separation of the received water tub.

[2] The water- tub carrier of claim 1, wherein the coutnerflow prevention material comprises: a vertical bar; a rotative bar mounted vertically to the vertical bar; a joint unit connecting the rotative bar rotatably by a limited angle to the left and the right with respect to the vertical bar; and a torsion spring mounted to and supported by the vertical bar to offer resilient force for returning the rotative bar to the initial position.

[3] The water- tub carrier of claim 2, wherein the joint unit comprises: a connection piece consisting of a vertical bar insertion ring penetrated by the vertical bar to be rotatably fit around the vertical bar and having a cutout part formed along outer circumference thereof, and a rotative bar insertion ring extended horizontally from the vertical bar insertion ring and fit around an end of the rotative bar; a restriction pin fastened to the vertical bar through a cutout part to restrict rotational angles of the connection pieces and the rotative bar; and a friction relief ring made of synthetic resin, mounted between the vertical bar and the vertical bar insertion ring, and rotated along with the vertical bar insertion ring, thereby preventing contact between the vertical bar and the vertical bar insertion ring.

[4] The water-tub carrier of claim 3, wherein, in the joint unit, the vertical bar insertion ring and the rotative bar insertion ring are divided into two parts in a longitudinal direction, the divided parts of the rotative bar insertion ring are connected with each other by a fastening bolt and a nut, and the divided parts of the vertical bar insertion ring include an engaging recess and an engaging projection, respectively, on the opposite sides to the rotative bar insertion ring and are connected with each other by the engaging recess and the engaging projection.

[5] The water- tub carrier of claim 1, wherein the base frame comprises multiple layers in a vertical direction.

[6] The water- tub carrier of claim 1, wherein the base frame includes a roller unit for sliding the water tub thereon forward and backward, the roller unit comprising: a main frame mounted to the base frame forward and backward and including a bottom side and both sidewalls; and a plurality of rollers arranged in forward and backward rows between the sidewalls of the main frame to slidably support the water tub.

[7] The water- tub carrier of claim 1, wherein a mounting piece is further comprised at each uppermost corner of the water-tub carrier to correspond to the lowermost corners of another water-tub carrier, for superposition of a plurality of the water- tub carriers.

[8] The water- tub carrier of claim 1, wherein an ad plate is further comprised to cover the outside of the sidewall frames which are arranged at the outermost side, and the upper side of the sidewall frames.

[9] The water- tub carrier of claim 1, wherein the base frame has a lattice structure comprising anteroposterior horizontal bars and lateral horizontal bars, and the sidewall frame has a lattice structure comprising the anteroposterior horizontal bars and vertical bars.

[10] The water- tub carrier of claim 1, further comprising a separation prevention material movably mounted across the sidewall frames of the front side to selectively obstruct an entrance of the receiving space according to the position thereof.

[11] The water- tub carrier of claim 10, wherein the separation prevention material comprises: a pair of static pieces respectively fixed to the sidewall frames dispose at both outer sides among the plurality of the sidewall frames, and having a displacement slit comprising an upper mounting part formed at an upper part thereof, a lower mounting part formed at a lower part, and a displacement part linking the upper to the lower mounting part; and a blocking bar movably connected in the displacement slits of the static pieces by both ends thereof, spanning the sidewall frames of the front side, and obstructing the entrance of the receiving space when disposed in the upper mounting part so that separation of the water tubs is prevented and releasing the obstruction when disposed in the lower mounting part. [12] A water- tub carrier equipped with a counterflow prevention material, comprising: a base frame horizontally mounted; a plurality of sidewall frames mounted vertically to the base frame and arranged forward and backward at intervals, thereby forming a receiving space therebetween to receive water tubs; the counterflow prevention material mounted direct each other in pairs, to be rotated by the water tub being pushed in the receiving space and then returned to the initial position to thereby prevent separation of the received water tub, and comprising a vertical bar, a rotative bar mounted vertically to the vertical bar, a joint unit connecting the rotative bar rotatably by a limited angle to the left and the right with respect to the vertical bar, and a torsion spring mounted to and supported by the vertical bar to offer resilient force for returning the rotative bar to the initial position; and a separation prevention bar comprising a pair of static pieces respectively fixed to the sidewall frames dispose at both outer sides among the plurality of the sidewall frames and having a displacement slit comprising an upper mounting part formed at an upper part thereof, a lower mounting part formed at a lower part and a displacement part linking the upper to the lower mounting part, and a blocking bar movably connected in the displacement slits of the static pieces by both ends thereof, spanning the sidewall frames of the front side, and obstructing the entrance of the receiving space when disposed in the upper mounting part so that separation of the water tubs is prevented and releasing the obstruction when disposed in the lower mounting part.