JP4373131B2 - Load collapse prevention device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cargo collapse prevention device for preventing cargo collapse stored in a cargo storage space provided in a cargo transport vehicle such as a truck or a container, a railway vehicle, a ship, an aircraft, and the like. The present invention relates to a load collapse prevention device including an inflatable body provided in a space and an air supply / discharge mechanism capable of supplying air to the inflatable body so as to restrict or prevent the movement of cargo by inflating the inflatable body.
[0002]
[Prior art]
As this type of load collapse prevention device, long pipe-like inflatable bodies are suspended at the left and right side walls and the center of the left and right sides of the loading platform, and these inflating bodies are inflated between the left and right of the loads. Therefore, there is one that restricts left-right movement of the load between the left and right side walls to prevent collapse of the load. As such a conventional example, the one disclosed in Patent Document 1 is known.
[0003]
In addition, a long pipe-shaped expansion body is deployed on the ceiling wall of the loading platform, and the expansion body located in the gap between the top surface of the cargo and the ceiling wall is inflated, so that the load is pressed down and does not shake. Some of them are designed to prevent the collapse of cargo. As such a conventional example, the one disclosed in Patent Document 2 is known.
[0004]
[Patent Document 1]
JP-A-8-53230 [Patent Document 2]
Japanese Patent Laid-Open No. 10-297352
[Problems to be solved by the invention]
However, in the thing of patent document 1, since it has arrange | positioned in the state which suspended the expansion body in the inner side of the left and right side walls, and the right and left center of the luggage compartment, when moving the luggage in the luggage compartment or when unloading the luggage In some cases, the suspended expansion body may get in the way. In addition, since the inflatable body exists in two places, the upper end of the cargo compartment and a position slightly lowered from the upper part, it comes from a low-height baggage, a constricted baggage, or the size of the baggage Depending on the size of the gap, the inflatable body could not press the load well, and could not cope with it.
[0006]
And, as described in Patent Document 2, in the case of a structure in which the baggage is pressed downward with a pipe-like inflating body that is continuous in the front and rear direction, when carrying uniform baggage exclusively, the collapse of the load is effectively prevented. However, there is a case where the pressing action cannot be fully exerted in the case of luggage having different heights such as different types and shapes. As described above, in any of the conventional techniques, regardless of the shape and size of the load, further improvement can be achieved by causing an effective pressing action by supplying air to the inflating body and preventing the load collapse reliably. There is room for.
[0007]
An object of the present invention is to provide a load collapse prevention device capable of obtaining an effective load collapse prevention effect even when the height of the load is substantially different while keeping the expansion body out of the way during loading / unloading and movement of the load. Is to provide
[0008]
[Means for Solving the Problems]
The load collapse prevention device according to claim 1 includes a bellows expansion body formed by connecting a plurality of small expansion portions in series in a state where the internal spaces communicate with each other,
The bellows expansion body is suspended in the cargo storage space by setting it as a flat vertical shape in which the small expansion portions elongated in the width direction of the cargo storage space are lined up and down. It is configured to be freely switchable between a usage state that can be extended downward to restrict or prevent the movement of cargo and a non-use state that is moved and shrunk upward and folded along with air discharge.
In the state of use, it is located between cargoes in the cargo storage space to prevent collapse of the cargo in the cargo storage space,
Further, a support member for suspending the bellows expansion body in the cargo storage space is provided, and the support member can be installed over the left and right side walls of the cargo storage space, and its installation position can be adjusted back and forth. The attachment means is provided.
[0009]
According to the configuration of the first aspect, since the balloon-like expansion body is a bellows type expansion body, the expansion / contraction movement amount of the expansion body accompanying the air supply / discharge is reduced in the series connection direction of the small expansion portions. Can be set very large. That is, the ratio of the series connection direction length in the non-use state folded and contracted by air discharge to the series connection direction length in the use state expanded and extended by air supply, that is, the expansion ratio (shrinkage ratio). It can be made larger than before.
[0010]
Therefore, when not in use, it can be shrunk to save space in a more compact state, so when loading luggage or moving luggage in a cargo storage space such as a cargo compartment, the bellows expansion in the unused state Your body will not get in the way. Since the expansion rate associated with the air supply is large, for example, when the bellows inflating body is suspended and used, the gap size with the ceiling wall can be variously changed depending on the height of the load, and for example, front and rear or left and right Even when used between different loads, even if the heights of the loads are different, it is possible to cope with the large vertical dimension of the bellows expansion body in use.
[0011]
Expansion Consequently, the expansion body by devising be set to bellows expansion body expansion ratio is made large, a reasonable means do not need large modifications and significant increase in cost of the apparatus, when out and movement of the load It was possible to provide an improved load collapse prevention device capable of obtaining an effective load collapse prevention effect even when the height of the load varies substantially while keeping the body out of the way.
In addition, it can be configured as a bellows inflatable body that can act widely in the vertical direction with respect to gaps between luggage or between the luggage and each side wall, and acts on the luggage in the cargo storage space from the side to prevent collapse of the cargo. Can do. In this case, there is an advantage that even if there is a large difference in the height of the adjacent luggage, it can be covered by the large vertical dimension of the bellows expansion body in use.
Furthermore, since the bellows expansion body can be suspended from the support member laid over the left and right side walls, the bellows expansion body can be arranged in the left-right direction, and the expansion action is performed in the gap between the front and rear of the luggage. It is suitable for usage. Therefore, it is suitable for a cargo storage space with a long front and rear length, such as a luggage compartment of a truck car. Can be prevented.
[0016]
According to a second aspect of the present invention, there is provided the load collapse prevention device according to the first aspect , wherein the attachment means is provided at both an upper end portion and an upper and lower intermediate portion of the cargo storage space.
[0017]
According to the configuration of claim 2 , when the attachment means of the support member is installed at the upper end portion of the cargo storage space, the non-use bellows expansion body folded by air discharge is arranged at the upper end portion of the cargo effective space. Thus, it is possible to achieve a compact storage state that does not interfere with operations such as movement and loading of luggage (see FIG. 7). And if the attachment means is installed in the upper and lower middle part of the cargo storage space, the bellows expansion body will be in a state of use extending downward due to the air supply. While being able to give a collapse preventing action, even for a low load, the lower end portion of the bellows inflatable body can be set at a sufficiently low position, and an effective load collapse preventing action can be given (Fig. 8).
[0018]
As a result, by changing the support member up and down, both the compact storage capacity of the bellows expansion body in the non-use state and the usability of the bellows expansion body in the use state are further improved, and an easy-to-use and convenient load collapse prevention device. Can be provided.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic overall configuration diagram showing a load collapse prevention device A applied to a truck luggage compartment, and FIG. 2 is a front view of the truck luggage compartment showing an example of use of the bellows expansion body B. FIGS. These are various figures, such as a top view which shows the structure of bellows expansion body B. FIG. 7 and 8 are views showing the left side wall of the luggage compartment, and FIG. 9 is an action diagram showing the order of the expansion operation of the bellows expansion body.
[0026]
As shown in FIGS. 1 and 2, the cargo compartment (cargo storage space) r mounted on the truck car includes a bottom plate 1 that is a truck bed, left and right side walls 2 and 3, a ceiling wall 4, and a front wall 5. And a rectangular box composed of a rear wall 6 that can be freely opened and closed. The rear wall 6 is composed of a pair of left and right doors 6a and 6b that can swing open and close by a vertical axis P provided at left and right ends. A large number of loads n are stored while being placed on the pallet p, rolled by the roller conveyor 31 provided on the bottom plate 1 and packed in the back.
[0027]
The load collapse prevention device A includes a bellows inflatable body B provided in the left and right two rows arranged in the cargo storage space r via a support bar (an example of a support member) 9 and a plurality of front and rear bellows expansion bodies B. The blower system E is configured to be freely expanded by supplying air and sucking and contracting air. As shown in FIG. 1, the blower system E includes a blower 14 and a control box 27 connected thereto.
[0028]
The control box 27 is provided with a pressure switch (not shown) and a toggle switch having three contact points of supply-off-exhaust. And this control box 27 and the blower system E are connected by the wiring which is not illustrated.
[0029]
The blower 14 has an impeller housed in a casing having a discharge port 15 and a suction port 16, and the impeller is rotationally driven by a motor 14a. The piping from the motor-operated valve 13 is connected to the discharge port 15 and the suction port 16 is open to the atmosphere. However, when the rotation of the motor 15 is switched between forward and reverse, the rotational direction of the impeller is also switched forward and backward, and the air is sucked and discharged from the suction port 16. The blower 14 is connected to each bellows expansion body B in the cargo storage space r via pipes 28 and 29.
[0030]
As a type of the blower 14, a turbo type blower that can increase the pressure to 0.03 kgf / cm ^{2 to} 0.15 kgf / cm ² and increases the pressure of the passing air by the overflow generated by the action of the blades. Or it is preferable to use a compressor, for example, a ring blow (made by Fuji Electric Co., Ltd.), a Kranz blower (made by Takagi Iron Works Co., Ltd.), etc. The blower 14 is operated by an on-vehicle power source. The in-vehicle power source is usually 24V DC, and can be switched to normal rotation or reverse rotation only by changing the plus or minus connection form.
[0031]
As shown in FIGS. 3 to 6, the bellows expansion body B is made of a synthetic resin material and has a plurality of hollow split expansion portions 17 each having an oblong shape (an example of a long shape) that is horizontally long. The air hose 18 for supplying / discharging air is attached to the upper surface of the uppermost hollow inflating part 17. The inflating parts 17 adjacent to each other in the vertical direction are connected and integrated with each other via a long plastic reinforcing plate 19 (refer to FIG. 5). The communication holes 20 that communicate with each other are formed at a plurality of locations (three locations or more) in a state of passing through a reinforcing plate (an example of a connection reinforcing member) 19.
[0032]
Each of the split expansion portions 17 is formed by flange-joining an upper frame 17a and a lower frame 17b, and is positioned at an inner portion of the flange portion 17c between the upper and lower sides, and a piano wire (an example of a wire rod) is bent. An oval shape (an example of a loop shape) formed is internally provided. And it is suspended and supported by the support bar 9 using the belt member 22 of four places attached to the expansion | swelling part 17 of the uppermost part.
[0033]
Therefore, by supplying air using the blower system E, the bellows inflatable body B is in a usage state in which each of the small expansion portions 17 expands downward (an example of a series connection direction) [FIGS. 9 (c)] and a non-use state in which each of the small expansion portions 17 is folded upward and shortened by shrinking with air discharge [an example of the serial connection direction] [FIGS. 6 and 7]. , Refer to FIG. 9 (a)].
[0034]
The shape-retaining member 21 is equipped to maintain the shape of the flange portion 17c in the in-use state in which air is supplied and inflated so that the bellows expansion body B extends straight down. Further, an open / close valve 30 for venting air is provided on the upper side of the uppermost split expansion portion 17, and when the open / close valve 30 is opened when the air is sucked, the bellows expansion body is provided. Since atmospheric-pressure air can freely flow into B, the free-running state in which the air hangs down without much expansion can be achieved by its own weight as shown in FIG. 9B.
[0035]
Next, the mounting structure of the bellows expansion body B in the luggage compartment r will be described. First and second lashing rails (an example of attachment means) 7 and 8 having a length substantially extending in the front and rear of the cargo compartment 1 are respectively provided at the upper end portion and the intermediate portion of the inner wall surfaces of the left and right walls 2 and 3. Is attached, and a plurality of support bars 9 are installed so as to be interchangeable while straddling the pair of left and right lashing rails 7, 7 (8, 8). Each of the lashing rails 7 and 8 is formed with a large number of mounting holes 10 each having a vertically long rectangle in a side view in the front and rear at very short intervals.
[0036]
The support bar 9 is formed by providing beam sockets 12 at the left and right ends of the pipe material 11, and the beam socket 12 is configured to be able to engage and release the lashing rails 7 and 8 using the mounting holes 10. . That is, the support bar 9 is installed over the left and right first lashing rails 7 as shown in FIG. 7 and the support bar 9 is installed over the left and right second lashing rails 8 as shown in FIG. The position can be adjusted in the front-rear direction by replacing the beam socket 12 with the front and rear mounting holes 10 even in a non-use state.
[0037]
Next, how to use the load collapse prevention device A will be described. First, when not in use, the support bar 9 is installed on the upper left and right first lashing rails 7 and air is sucked and discharged (exhausted) using the blower 14 so that the bellows expansion body B has the smallest vertical dimension. In a non-use state, it is positioned near the ceiling wall 4 so as not to interfere with loading and unloading (see FIGS. 6 and 7).
[0038]
To use, first, as shown in FIG. 9A, the bellows inflatable body B in a non-use state is positioned just on the rear surface of the front load n already loaded in the cargo compartment (cargo storage space) r. In a state where the front and rear positions are adjusted, the support bar 9 is rebuilt from the first lashing rail 7 to the lower left and right second lashing rails 8. At the time of this replacement, the on-off valve 30 remains in the closed position.
[0039]
Next, the on-off valve 30 is artificially operated from the closed position to the open position, the internal space of the bellows expansion body B is released into the atmosphere, and the bellows expansion body B is brought into a free-hanging state as shown in FIG. In this state, it is desirable to set the front end portion of each of the split expansion portions 17 so as to lightly touch the rear side wall of the front luggage n.
[0040]
The load n on the rear side is carried in using the slide rail 8 or the like, and the bellows expansion body B in a freely suspended state, that is, the rear end portion of each split expansion portion 17 touches the front side wall of the rear load n lightly. Install it at an appropriate position. When the rear luggage n is installed, air is supplied to the bellows inflating body B using the air supply / discharge mechanism E, and is expanded between the front and rear luggage n as shown in FIG. Fill in the gaps between them.
[0041]
The above is a series of usage procedures. Actually, a gap for the bellows inflatable body B cannot be formed between the front and rear loads n, and a plurality of bellows are piled together to some extent, and then a plurality of bellows are simultaneously gathered. Although the inflatable body B may be inflated, even in these cases, it is possible to sufficiently exhibit the load collapse prevention effect that fills the gaps between the loads and prevents them from swinging.
[0042]
Further, by changing the erection direction of the support bar 9 or using the support bar 9 separately from the support bar 9, the flat bellows inflating body B having the above-mentioned vertical type and a narrow lateral width can be obtained from the front and rear walls 5, 6 and the luggage n. Can be used between the left and right sides of the left and right side walls 2 and 3 and the baggage n as a front-back orientation. Further, it can be used between the luggage n and the ceiling wall 4 as a lying posture.
[0043]
In the present specification, the “vertical type” in which the bellows expansion body B is a vertical type means that the expansion and contraction movement direction accompanying the air supply and discharge by the bellows structure is upward and downward. Therefore, when the support bar 9 is used in the vertical direction, it is called a “horizontal type” in which the bellows expansion body B expands and contracts in the horizontal direction by air supply / discharge.
[0044]
[Another embodiment]
(1) As shown in FIGS. 10 and 11, the bellows expansion body B may be configured in a vertical shape that exhibits a rectangle (square) in plan view. The bellows inflatable body B is suspended from the ceiling wall 4 and is used to prevent the collapse of the load n by fixing the load n so as not to move by pressing the load n downward from above. Accordingly, in order not to easily move in the front-rear and left-right directions, the shape in plan view of each of the split inflating portions 32 is set to a square with good sitting. The shape in plan view may be a pentagon or more regular polygon or a circle.
[0045]
The basic structure is the same as the flat bellows expansion body B described above except that the shape in plan view is different. A plurality of (seven) small inflatable portions 32 are provided with a square soft plastic reinforcing plate (an example of a connection reinforcing member) 33 in plan view between adjacent ones in the vertical direction, and each small The split expansion portion 32 is internally provided with a shape-retaining member 35 formed by bending a piano wire into a square shape (an example of a loop shape), and an air hose for supplying and discharging air to the uppermost split expansion portion 32. 34 is provided. As shown in FIG. 10, a total of four communication holes 36 are formed at the four corners of the reinforcing plate 33 so as to internally communicate the adjacent split expansion portions 32 vertically.
[0046]
As shown in FIG. 11, the bellows expansion body B has a vertical height dimension in a non-use state in which air is sucked (exhausted) and contracted upward, which is about the height dimension in a use state expanded by air supply. Although set to 1/20 or less, the shrinkage ratio (expansion ratio) can be set as appropriate depending on the shape, material, number, etc. of the split expansion portion 32. In addition, in FIG. 11, the thing of each state is drawn on it so that it may be easy to contrast the height dimension of a use state and a non-use state.
[0047]
Next, how to use the load collapse prevention apparatus A having the rectangular bellows expansion body B in the plan view will be described. First, as shown in FIG. 12 (a), the bellows expansion body B is discharged to be in a non-use state, and the load n is moved downward of the non-use state of the bellows expansion body B.
[0048]
Next, when the load n has finished moving to a predetermined position below the bellows expansion body B, air is supplied to the bellows expansion body B using the air supply / discharge mechanism E, and as shown in FIG. The lower inflated portion 32 brings the upper surface of the baggage n into a downward use state. The pressing force of the load n may be controlled by the pressure of the supplied air.
[0049]
Although not shown, the bellows expansion body B is also provided with an opening / closing valve (having the same function as the opening / closing valve 30 described above) that can be released to the atmosphere, and first, the opening / closing valve is opened to freely hang down. The driving air supply structure may be adopted so that the power of the air supply / discharge mechanism E can be reduced.
[0050]
(2) Although illustration is omitted, if a bellows inflatable body B having a rectangular shape in plan view is provided on the ceiling wall 4 above the pallet for each pallet p mounted in the luggage compartment r, the function of preventing collapse of the cargo is provided for each load. In addition, the bellows expansion body B can be pressed downward regardless of the size and shape of the load.
[0051]
【The invention's effect】
As described above, the load collapse prevention device according to the present invention includes an inflatable body provided in a cargo storage space, and an air supply that can supply air to the inflatable body in order to inflate the inflatable body and restrict or prevent movement of the cargo. In the load collapse prevention device having a discharge mechanism, the expansion body is formed into a bellows expansion body formed by connecting a plurality of small expansion portions in series in a state where the internal spaces communicate with each other. Switching between a use state where the split expansion part expands in the series connection direction with air supply and a non-use state where the split expansion part contracts with the air discharge and shortens in the series connection direction It is characterized by being freely configured.
[0052]
As a result, even if a long flat bellows inflating body having a narrow width in a plan view or a bellows inflating body having a square shape in a plan view can be used, the expansion ratio of these inflating bodies can be increased, and the non-use state In the case of loading / unloading and moving the package with a rational means that does not require a large remodeling or significant cost increase as a device, it is possible to obtain a compact storage property at the time of use and a wide range of effect of holding the load in use. In addition, it is possible to provide an improved load collapse prevention device capable of obtaining an effective load collapse prevention effect even when the height of the load is substantially different while preventing the expansion body from becoming an obstacle.
[Brief description of the drawings]
FIG. 1 is a front view of a cargo compartment showing an example of use of a load collapse prevention device.
FIG. 2 is a schematic overall configuration diagram showing a load collapse prevention device.
FIG. 3 is a plan view showing a bellows expansion body in use.
FIG. 4 is a front view showing the bellows expansion body in a use state.
FIG. 5 is a partially cutaway plan view showing the bellows expansion body in a non-use state.
FIG. 6 is a front view showing the bellows expansion body in a non-use state.
FIG. 7 is a side view of the inside of the cargo compartment when the bellows expansion body is not in use.
FIG. 8 is a side view of the inside of the cargo compartment when the bellows expansion body is in use.
FIGS. 9A and 9B show the operation of the bellows expansion pair, in which FIG. 9A is a side view in a state where a front load is loaded, FIG. 9B is a side view in a free state, and FIG. It is a side view which shows a state.
FIG. 10 is a plan view of the bellows expansion body according to another structure in a non-use state.
11 is a side view of the bellows expansion body shown in FIG. 10. FIG.
12A and 12B show the operation of the bellows expansion pair having another structure, in which FIG. 12A is a side view in a non-use state before the load is loaded, and FIG. 12B is a side view in a use state in which the load is pressed.
[Explanation of symbols]
2, 3 Side wall 4 Ceiling wall 7, 8 Mounting means 9 Support member 17, 32 Split expansion portion 19, 33 Connection reinforcement member 21, 35 Shape retaining member B Bellows expansion body E Blower system r Cargo storage space

Claims (2)

A bellows inflating body formed by connecting a plurality of small inflating portions in series in a state where internal spaces communicate with each other,
The bellows expansion body is suspended in the cargo storage space by setting it as a flat vertical shape in which the small expansion portions elongated in the width direction of the cargo storage space are lined up and down, and with air supply It is configured to be freely switchable between a use state in which it can be extended downward to restrict or prevent the movement of cargo and a non-use state in which the cargo is moved and shrunk upward and folded along with air discharge.
In the state of use, it is located between cargoes in the cargo storage space to prevent collapse of the cargo in the cargo storage space,
Furthermore, a support member for suspending the bellows expansion body in the cargo storage space is provided, and the support member can be installed over the left and right side walls of the cargo storage space, and its installation position can be adjusted back and forth. Load collapse prevention device provided with an appropriate attachment means.   The load collapse prevention device according to claim 1, wherein the attachment means is provided at both an upper end portion and an upper and lower intermediate portion of the cargo storage space.

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