JP2002347510A - Load collapse prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load collapse prevention device which can firmly fasten freight in a freight accommodating space of a truck etc., without performing a load collapse preventing operation which usually calls for labor hour or expertise, and can be used even when a freight is brought in or carried out in a cage cart without causing the freight being damaged by flashes on the cage cart or having interference with the cage cart, excellent in durability and capable of effectively utilizing a space. SOLUTION: The load collapse prevention device comprises a bag member 5 which is fixed to a rear wall 7 of a freight accommodating space for accommodating and transporting the freight and can be inflated and contracted by means of air and a means 6 to supply air to the bag member 5 and a fixing means 9 which is fixed to rails 12 disposed in the longitudinal direction so that the fixing member 9 holds and fastens the freight between the bag member 5 and the fixing means 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents cargo collapse when cargo is stored and transported 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, or the like. For preventing collapse of cargo for use.

[0002]

2. Description of the Related Art Freight vehicles such as trucks and containers,
When storing and transporting cargo in the cargo storage space provided in railway vehicles, ships, aircraft, etc., in order to prevent collapse of cargo in the cargo storage space,
It is common practice to arrange cushioning material around cargo and fix the cargo with a lashing belt. However, the work to prevent the collapse of the load has problems such as labor and skill required for the work, and is disclosed in Japanese Patent Application Laid-Open Nos.
As disclosed in Japanese Patent No. 53230, there is known a cargo collapse prevention device in which an inflatable body is provided in a depth direction of an inner wall of a cargo storage space, and the inflatable body is expanded to fix the cargo in the storage space.

[0003]

However, depending on the form of the cargo, it is often difficult to stably secure the cargo using only the inflatable body. When the cargo storage space is a truck bed and a bulk load is carried in and out of the cargo bed, a car is generally used. However, the car is usually provided on the bottom surface of a metal frame. Are provided with casters, and when used for a long period of time, the frame body is often deformed or burrs are generated. When fixing the car by the conventional cargo collapse prevention device, the inflatable body is caught on the car at the time of carrying in and out,
Alternatively, there is a problem that the expansion body may be damaged by the burrs at the time of fixing. To prevent this,
It is also conceivable to arrange a plate material or the like having a certain strength in the depth direction of the inner wall of the storage space and interpose it between the car and the inflatable body. However, it becomes disadvantageous in weight as well as in size, and the load capacity is reduced.

The present invention has been made in view of the above circumstances,
Cargo can be stably fixed to a cargo storage space such as a truck without performing troublesome and skillful cargo collapse prevention work, and even when cargo is carried in and out by a car with a tendency to generate burrs etc. It is an object of the present invention to provide a cargo collapse prevention device that can be used without interfering with or damaged by a car, has excellent durability, and can effectively utilize a storage space.

[0005]

According to a first aspect of the present invention, there is provided a cargo collapse prevention device which is attached to a back wall in a cargo storage space for storing and transporting cargo, and is provided with air. An inflatable and deflated bag, air supply means capable of supplying air to the bag, and the cargo between the bag and a rail disposed in a depth direction of the storage space. And a load holding means that can be attached so as to fix the

According to this structure, the cargo can be fixed so as to be sandwiched between the front and rear by the bag body attached to the back wall and capable of being inflated and contracted and the load holding means movable in the depth direction of the storage space. Becomes For this reason, it is possible to stably fix the cargo in the cargo storage space such as a truck without performing troublesome and skillful cargo collapse prevention work. Can be fixed. In addition, even when cargo is carried in and out using the above-mentioned carts, it does not interfere with the carts and is not caught, there is little possibility of being damaged, and it is a durable cargo collapse prevention device with excellent durability Can be obtained. In addition, with bag and load holding means,
Since it is configured to be sandwiched back and forth with respect to the depth direction of the loading platform, a compact collapse prevention device can be realized, and the storage space can be effectively utilized.

[0007] According to a second aspect of the present invention, in the load collapse prevention device according to the first aspect, the bag body fixes the cargo through a load holding plate.

According to this configuration, the cargo is not fixed directly by the bag, but is fixed via the load holding plate. For this reason, even when carrying in / out cargo using a car or the like, the car or the like can be fixed without the bag directly contacting the car or the like. Therefore,
It is possible to obtain a load collapse prevention device that is not caught or damaged due to interference with a car or the like.
And since it is fixed by the load holding plate, the car and the like can be fixed stably. In addition, since only the width of the cargo holding space is required for the load holding plate, it is possible to obtain a light-weight and simple mechanism for preventing collapse of the load.

According to a third aspect of the present invention, in the load collapse prevention device according to the second aspect, the attaching means for attaching the bag body to the back wall includes a mounting plate disposed facing the back wall; Supporting means for attaching the bag body to the mounting plate, connecting means capable of connecting the load holding plate and the mounting plate with the bag body interposed therebetween and expanding and contracting according to expansion and contraction of the bag body, Urging means for urging the load holding plate toward the mounting plate.

[0010] According to this configuration, since the mounting means is a unit including the bag body and the cargo holding plate, the mounting in the cargo storage space can be easily performed. Then, after carrying the cargo by inflating the bag body with air, when the cargo is carried out, the bag body can be easily contracted, and the fixation of the cargo can be smoothly released.

According to a fourth aspect of the present invention, in the load collapse prevention device according to any one of the first to third aspects, the load holding means can adjust a positional relationship with respect to the cargo in two or more steps. I do.

According to this structure, after the air is discharged from the bag for releasing the fixation of the cargo, the load holding means can be easily removed. That is, even if air is discharged from the bag, the cargo holding means remains pressed by the cargo, and even if it is difficult to remove the cargo holding means as it is, the cargo holding means itself may be in contact with the cargo. By changing the positional relationship, the cargo can be separated from the cargo holding means, and the cargo can be quickly unloaded.

According to a fifth aspect of the present invention, there is provided the cargo collapse prevention device according to the fourth aspect, wherein the load holding means has both ends attachable to rails provided in a depth direction of the cargo storage space; Driving means provided in the main body, a push frame that can be moved back and forth in the depth direction of the storage space with respect to the main body by the driving means,
It is characterized by having.

According to this configuration, the positional relationship with respect to the cargo can be easily adjusted by the driving means provided on the load holding means, and the load holding means can be easily removed. Therefore, it is possible to quickly carry out the work of unloading the cargo.

According to a sixth aspect of the present invention, there is provided the load collapse prevention device according to the fifth aspect, wherein the driving means is provided with a pin provided on the push frame and a cam rotatably provided on the main body and engaged with the pin. It is characterized by comprising a cylindrical cam provided with a groove, and operating means for rotating the cylindrical cam.

According to this structure, the driving means for adjusting the positional relationship of the cargo holding means with respect to the cargo can be realized by a compact and easy mechanism.

According to a seventh aspect of the present invention, there is provided a load collapse prevention device according to any one of the first to sixth aspects, wherein abnormality monitoring means for detecting an operation state of the bag or the air supply means, and operation of the detected operation state. Display means for notifying the user.

According to this configuration, for example, it is constantly monitored whether an abnormal operation state such as a case where the air pressure inside the bag does not reach a predetermined value and the bag is not inflated normally is generated. However, when an abnormality occurs, it is possible to promptly notify the worker. Therefore, the operator can take measures at the same time as the occurrence of the abnormality, and can prevent the collapse of the load.

According to an eighth aspect of the present invention, there is provided the cargo collapse prevention device according to any one of the first to seventh aspects, wherein the cargo storage space is a truck bed, and the cargo is moved by a cart to the cargo bed. It is characterized by carrying in and out.

In this case, since the load collapse prevention device can be used without interfering with or being damaged by the car, it is possible to provide a load collapse prevention device exhibiting a particularly excellent effect for use in a car transportation vehicle. .

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a state in which a load collapse prevention device 1 according to the present embodiment is attached to a bed 3 of a truck 2 which is a cargo storage space for storing and transporting cargo, and still shows a car. 2 shows a state where the car 4 is not fixed, while FIG. 2 shows a state where the car 4 is fixed. FIG. 4 is a view showing a state where the truck 2 loaded with the car 4 is viewed from the entrance side of the carrier 3, and FIG.
FIG. 4 is a diagram schematically showing a connection structure with the maker. Incidentally, the cart 4 is used for carrying in / out the bulk load to / from the carrier 3, and is usually provided on the bottom surface of the metal frame 4a.
b is provided. The application of the present invention is not necessarily limited to the case where the car 4 is fixed on the bed 3 of the truck 2 as shown in the present embodiment, and cargo transport vehicles such as containers, railway vehicles, ships, aircraft, etc. The present invention can be widely applied to a case where cargo is stored and transported in a cargo storage space.

In FIG. 1 and FIG. 2, a load collapse prevention device 1 is attached to a back wall 7 in a loading bed 3 via a mounting bracket 8 and can be inflated and contracted by air. Load holding means 9 attachable so as to fix the cart 4 as cargo between the bag 5 and the bag body 5. The bag body 5 fixes the cart 4 via the load holding plate 10, and is attached to the back wall 7 by the attaching means 11, and as shown in FIG.
The air supply means 6 is connected so that air can be supplied. In addition, as shown in FIG. 4, the load holding means 9 is attached to a rail (hereinafter, referred to as a "lashing rail 12") arranged in the depth direction of the loading platform 3.

In FIG. 1 and FIG. 2, the bag body 5 is made of a woven fabric in which warp and weft are woven in a cylindrical shape, and is provided with a flexible rubber or synthetic resin lining on the inner surface, and has airtightness. ing. This configuration allows expansion and contraction by air. In addition, the bag body 5 is not limited to a structure in which the woven fabric and the rubber are bonded, but may be any air-tight bag which can be expanded and contracted by air. Is also good.

FIG. 3 is a schematic view showing the mounting means 11. In FIGS. 1 to 3, the mounting means 11 includes a mounting plate 13 provided facing the back wall 7 and the mounting plate 13. Support means 14 for attaching the bag 5 to the bag, connecting means 15 for connecting the load holding plate 10 and the mounting plate 13 with the bag 5 interposed therebetween, and capable of expanding and contracting according to expansion and contraction of the bag 5; Biasing means 16 for biasing the plate 10 toward the mounting plate 13. The load holding plate 10 is a flat plate and is connected to the mounting plate 13 with the bag 5 interposed therebetween. As a result, the car 4 can be
Can be fixed via the load holding plate 10 instead of directly. Therefore, even when the car 4 is carried in and out, the bag 5 does not directly contact the car 4, and the car 4 can be fixed without being brought into contact with the bag 5. And the car 4 in the flat part
, And can be stably fixed.

The mounting plate 13 is made of a wooden plate, and is mounted on the mounting bracket 8. Support means 14 made of a rubber belt is provided on the mounting plate 13 at intervals sufficient to hold the bag body 5, and expands and contracts at a position where the bag body 5 faces the back wall 7. Making it possible.

The connecting means 15 includes two metal arms 15
a and 15b are configured as a link mechanism rotatably supported on each other. One arm 15a is attached to the load holding plate 10, and the other arm 15b is attached to the attachment plate 13. Thus, the bag body 5 can be expanded and contracted in accordance with the expansion and contraction. The connecting means 15 is provided above the load holding plate 10 and the mounting plate 13.
A total of four locations are provided at two locations and at the bottom, and support the weight of the load holding plate 10.

The biasing means 16 is configured as a spring for bridging the respective ends between the mounting plate 13 and the load holding plate 10 (see FIG. 3). The installation position and the spring constant of the urging means 16 need to be appropriately set in consideration of the air pressure supplied to the bag 5 and the like. The urging means 16 allows the bag 5 to be easily contracted when the cargo is transported after the bag 5 is inflated with air and then carried out, and the cargo can be smoothly unlocked. . The urging means 16 does not necessarily have to be as described in this embodiment.
Any material may be used as long as it can exert an urging force between the load holding plate 10 and the load holding plate 10.

As described above, the mounting means 11
Is a unit including the bag body 5 and the load holding plate 10, so that the unit can be easily attached to the carrier 3.

Next, the load holding means 9 will be described.
As shown in FIG. 4, the load holding means 9 includes lashing rails 12 extending in the depth direction on the side surfaces of the loading platform 3.
It is attached so as to be bridged at both ends, and is fixed so as to press the car 4 from the entrance side of the carrier 3.
5 and 6 show the structure of the load holding means 9, FIG. 5 is a schematic diagram showing a cross-sectional structure, and FIG. 6 is a schematic diagram showing a state in a longitudinal direction. 5 and 6, the load holding means 9 includes a main body 17 having both ends attachable to the lashing rail 12, a driving means 18 provided on the main body 17, and A push frame 19 that can move back and forth in the depth direction. Here, FIGS. 5A and 5B
5A and 5B show a state in which the push frame 19 is driven and is located at a position close to and away from the main body 17, respectively. FIGS. 5A and 5B show the internal structure of the push frame 19. FIG. The cross section at a position shifted in the longitudinal direction is shown for easy understanding.

The main body 17 has a gutter-shaped cross section whose outer edge is bent inward. The main body 17 partially includes the driving means 18 inside the gutter-like portion, and has a gutter-like shape as described later. The push frame 19 is
I support. At both ends of the main body 17, slide portions 23, which can be adjusted in length in the longitudinal direction of the load holding means 9, are provided.
In addition, a detachable fixing bracket 24 is attached to the lashing rail 12. The structure of the both ends makes it possible to mount according to the width of the carrier 3.

In FIG. 5, the push frame 19 is
An outer layer member 19 a having a U-shaped cross section and having a longitudinal direction along the main body 17, and a position corresponding to a portion where the driving unit 18 is provided for the main body 17,
And an inner layer member 19b attached to the outer layer member 19a. The inner layer member 19b has a U-shaped cross section like the outer layer member 19a, and a screw 1 is provided on the inner bottom of the outer layer member 19a.
9c and the fixing member 19d.
Further, a pin 22, which is a component of the driving means 18, which will be described later, is joined to one end of the inner layer member 19b.
In addition, a sliding hole 19e is provided at the center of the fixing member 19d, and can be freely fitted to a shaft member 25 of the driving means 18 to be described later, so that the push frame 19 is slidably supported. I have. The push frame 19 described above is supported by the main body 17 of the load holding means 9 such that the side plate portion 17a is sandwiched between the outer layer member 19a and the inner layer member 19b. The cargo is fixed so as to press the cargo with the outer bottom 19f of the outer layer member 19a.

The driving means 18 includes a pin 22 provided on the push frame 19, a cylindrical cam 20 rotatably provided on the main body 17, and a cam groove 26 cut into a cam groove 26 for engaging the pin 22. It has a handle 21 which is an operation means for rotating the cam 20. The cylindrical operating portion 27 to which the handle 21 is attached and the cylindrical cam 20 are coaxially arranged and joined by a shaft member 25 so as to rotate together. The shaft member 25 is fixed so as to penetrate the cylindrical cam 20 in the axial direction. One end of the shaft member 25 projects to the push frame 19 side, and the other end penetrates the main body 17.
Has been fixed. Push frame 19 of shaft member 25
The portion protruding to the side is, as described above, the fixing member 19d.
Is slidable so as to fit into the sliding hole 19e. The cam groove 26 is a groove spirally cut on the outer periphery of the cylindrical cam 20, and is provided at a position where it can be engaged with the pin 22. By rotating the handle 21 attached to the operation unit 27, the pin 22 slides along the spiral cam groove 26, and the push frame 19 moves the main body 17 and the shaft member 2.
5 while moving in the axial direction of the shaft member 25. The position of the handle shown in FIG. 6 shows the state in FIG. 5 (b). From this state, by rotating the handle 21 clockwise, the handle 21 is pushed to the state shown in FIG. 5 (a). The position of the frame 19 changes. That is, with these configurations, the load holding means 9
Fig. 5 (a) shows a positional relationship with respect to the car 4 as a cargo.
And (b) can be adjusted in two stages. In this embodiment, as shown in FIG.
Are provided in two places.

With the structure of the load holding means 9 described above, the bag 5 is used to release the fixation of the car 4 as a cargo.
After the air is discharged from the container, the load holding means 9 can be easily removed. In other words, even if air is discharged from the bag body 5, the load holding means 9 is kept pressed by the car 4 so that it is difficult to remove the load holding means 9 as it is. By changing the positional relationship between the car 4 and the car 4 by itself, the car 4 and the cargo holding means 9 can be separated from each other, so that the car 4 can be quickly unloaded.

Finally, the air supply means 6 for supplying air to the bag 5 will be described. As shown in FIG. 7, the air supply means 6 has a control box 28 directly connected to the bag body 5 and an air tank 29 connected to the control box 28. A source 30 is connected, and an external air supply port 31 is provided in a pipe connecting the air tank 29 and the truck air source 30.
Is provided. The external air supply port 31 can supply air to the air tank 29 by switching to the truck air source 30. The air supply means 6
Are disposed at the lower front portion and side portions of the truck 2.

Here, the air pipe to the bag 5 is connected to the bag 5 via an air supply valve 33 in the control box 28. The air supply to the bag body 5 is started by opening the air supply valve 33. When the air is discharged from the bag 5, the air is discharged to the outside of the bag 5 by opening the exhaust valve 34. When air is supplied to the bag 5, the truck air source 30 can be used when the truck engine is started. However, when the truck engine is stopped, factory air is introduced from the external air connection port 31. Then, the compressed air is accumulated in the air tank 29 and used. Incidentally, the truck air source 30 is configured as a blower or a compressor driven by electric power from a vehicle-mounted power supply such as a battery.

A pressure switch (not shown) is connected to the bag 5, detects the pressure in the bag 5, and opens and closes the air supply valve 33 in the control box 28 based on the detection result. Configuration. Then, an air supply valve is installed in the cab of the truck 2 so that an operator can grasp the operation state of the air supply valve 33 and know whether or not air leakage from the air pipe or the like has occurred. A lamp 32 is provided that lights up while the 33 is open. That is, abnormality monitoring means for detecting an abnormal operation state in the event of air leakage by monitoring the operation state of the air supply valve 33 with the control box 28 is configured. The lamp 32 constitutes display means for notifying an operator of the operation state detected by the abnormality monitoring means.

Next, the operation of the above-described load collapse prevention device 1 will be described. First, the mounting means 11, which is a unit including the bag 5 and the load holding plate 10, is mounted on the back wall 7 of the carrier 3. This mounting is shown in FIGS. 1 and 3
The mounting bracket 8 installed on the back wall 7 as shown in FIG.
This is done by attaching the attachment plate 13 to. Then, as shown in FIG. 1, the car 4 is carried into the carrier 3. At this time, the bag 5 is disposed at a position facing the back wall 7 and the load holding plate 10 is interposed therebetween, so that the bag 5 does not directly contact the car 4 and It will not be caught or hurt by interference. When the loading of the car 4 is completed, the load holding means 9 is mounted next. At this time, the load holding means 9
The main body 17 is an outer layer member 19a of the push frame 19.
5 (a) is located so as to be accommodated in the storage device.
From this state, the operator stands at the entrance of the carrier 3 and rotates the handle 21 counterclockwise with respect to the main body 17.
The operation of the handle 21 causes the cylindrical cam 20 to rotate, and the pin 22 slides along the cam groove 26 cut into the cylindrical cam 20 while engaging and moving the inner layer member 19 b of the push frame 19. Thereby, the state is shifted to the state of FIG. 5B in which the push frame 19 is positioned so as to protrude from the main body 17. Then, as shown in FIG. 4, both ends of the load holding means 9 are respectively attached to lashing rails 12 provided on both side walls of the loading platform 3. At this time,
The attachment of the load holding means 9 can be performed at an arbitrary position in the depth direction of the loading platform 3, so that the car 4 can be stably fixed regardless of the number of the loaded cars 4.

In this state, the supply of air to the bag 5 is started. First, a command to fix the car 4 issued by an operator pressing an operation button (not shown) provided in the driver's cab or the like is transmitted to the control box 28, the air supply valve 33 is opened, and the air tank 29 is opened. Compressed air is supplied to the bag body 5 from the container (see FIG. 7). When the supply of air is started, the state where the bag body 5 is contracted as shown in FIG. 1 changes to the state where the bag body 5 is expanded as shown in FIG.
As the bag body 5 expands, the cart 4 is pressed against the load holding means 9 via the load holding plate 10. At this time,
In FIG. 3, the bag 5 held by the support means 14 made of a rubber belt expands, the distance between the mounting plate 13 and the load holding plate 10 increases, and the two metal arms of the connecting means 15 extend. Note that the urging means 16 applies an urging force so as to resist the inflation direction with a force smaller than the force with which the bag body 5 expands.

When the inflation of the bag 5 progresses and a pressure switch (not shown) connected to the bag 5 detects a predetermined upper limit pressure (hereinafter referred to as "upper limit pressure P1"), the control box At 28, a command to close the air supply valve 33 is issued, and the supply of air is stopped. This completes the fixation of the car 4 between the load holding plate 10 and the load holding means 9 as shown in FIG.
Can be transported.

Next, the bag 5 rises to the upper limit pressure P1,
A case in which air gradually leaks from the air pipes and the like and the pressure drops in a state where the car 4 is completely fixed will be described with reference to FIG. At this time, the lower limit value of the inflation pressure necessary for fixing the car 4 in advance (hereinafter referred to as “lower limit pressure P2”)
Is set. When the pressure switch connected to the bag body 5 detects that a pressure drop below the lower limit pressure P2 has occurred, the air supply valve 33 is opened by a command from the control box 28. Thereby, the pressure of the bag body 5 rises again to the upper limit pressure P1. And the upper limit pressure P
When it reaches 1, the air supply valve 33 is closed. In this way, when the car 4 is fixed, the upper limit pressure P1 is always maintained.
The internal pressure of the bag body 5 is maintained between the lower limit pressure P2 and the lower limit pressure P2, and the car 4 is appropriately fixed.

If an abnormality occurs in the air pipe or the like and the air supply valve 33 is opened but the pressure is still lower than the lower limit pressure P2 and the pressure is not recovered, the air supply valve 33 is kept open without being closed. Become. At this time, the operating state of the air supply valve 33 is notified to the worker by lighting of the lamp 32 provided in the cab of the truck 2. That is, when the air supply valve 33 is open, the lamp 32 is lit, and depending on the lighting time, the operator can immediately determine that an abnormality has occurred in either the bag 5 or the air supply means 6. You can know. Thus, the operator can deal with the abnormality at the same time as the occurrence of the abnormality, and can prevent the collapse of the load.

Finally, the case where the transport of the car 4 is completed and the car 4 is carried out of the loading platform 3 of the truck 2 will be described. First, an unlocking command for the car 4 issued by an operator pressing an operation button (not shown) provided in the driver's cab or the like is transmitted to the control box 28, the exhaust valve 34 is opened, and the bag body is opened. The compressed air accumulated inside the bag 5 and expanding the bag 5 is discharged to the outside through the exhaust valve 34 (see FIG. 7). Thereby, the bag 5 contracts. At this time, the bag 5 is pressed by the urging means 16 provided between the load holding plate 10 and the mounting plate 13.
As the air inside is discharged, the bag body 5 is easily contracted (see FIG. 3). Therefore, it is easy to smoothly release the fixation of the car 4.

When the contraction of the bag 5 is completed, the load holding means 9 is removed next. At this time, the push frame 19 is in a state shown in FIG. From this state, this time, handle 2
1 is rotated clockwise, and the push frame 19 is moved with respect to the main body 17 again so as to be in the state of FIG. By performing the above operation, the load holding means 9
And the car 4 will be separated. Therefore, even if the load holding means 9 is kept pressed by the cart 4, even if the cart 4 and the load holding means 9 are kept pressed.
And the load holding means 9 can be quickly removed.

FIG. 1 shows a state in which the car 4 and the load-holding means 9 are separated from each other. In this state, the fixture 24 of the load-holding means 9 is removed, and the lashing rail 12 is removed.
The load holding means 9 is removed from the container. Then, the car 4 is carried out of the bed 3 of the truck 2. Thus, the transporting operation of the car 4 is completed. Such load collapse prevention device 1
Has a structure that can be easily attached and detached as a unit, so it is not limited to cargo storage spaces installed in cargo transport vehicles such as containers, rail vehicles, ships, aircraft, etc. Can be widely used.

As described above, the cargo collapse prevention device 1 according to the present embodiment can stably fix cargo in a cargo storage space such as a truck without performing labor and skillful cargo collapse prevention work. It is possible to stably fix even if the amount of cargo to be stored is small. In addition, even when cargo is carried in and out using a car, a cargo collapse prevention device having excellent durability can be obtained without being caught or damaged by interference with the car. In addition, a load collapse prevention device can be realized compactly, and a storage space can be effectively utilized.

The embodiment is not limited to the above-described embodiment, and may be modified as follows, for example. (1) The load holding means is not limited to the embodiment, but may be any of various other means as long as the positional relationship with the cargo can be adjusted in two or more steps. For example, a mechanism for supplying air into the main body of the load holding means may be provided as the driving means of the push frame, and the positional relationship of the push frame with respect to the main body may be changed by the supply and exhaust of the air. Further, as in the embodiment, the adjustment may not be performed only in two stages, but may be performed in three or more stages.

(2) The load holding means is not limited to the one shown in the embodiment, but may be, for example, one fixed by a ratchet buckle and a lashing belt. In this case, it is preferable to provide an interference preventing material such as a plate material between the lashing belt and the cargo so as not to come into direct contact.

(3) As shown in the embodiment, the abnormality monitoring means does not monitor the operation state of the air supply valve to the bag, but is configured by effectively utilizing the pressure switch. It may be something. For example, a pressure value lower than the lower limit pressure P2 (hereinafter, referred to as “lower lower limit pressure P3”).
May be set, and if the pressure falls below the lower limit pressure P3, it may be determined whether an abnormality has occurred in the bag body or the air supply means.

(4) The abnormality monitoring means may be configured by providing a distance sensor for measuring the distance between the load holding plate and the mounting plate. That is,
Whether or not the bag body is appropriately inflated may be determined based on whether or not the distance between the load holding plate and the mounting plate exceeds a predetermined value.

(5) The display means does not necessarily need to be a lamp as in the embodiment, and an abnormal state may be displayed to the operator, such as outputting a voice alarm based on the detection result of the abnormality monitoring means. Any type may be used as long as it can be recognized that the occurrence has occurred.

[0051]

According to the first aspect of the present invention, the cargo is sandwiched between the front and rear by the bag body attached to the back wall and expandable and contractable and the load holding means movable in the depth direction of the storage space. It can be fixed. For this reason, it is possible to stably fix the cargo in the cargo storage space such as a truck without performing troublesome and skillful cargo collapse prevention work. Can be fixed. And even when loading / unloading cargo using a car, etc., there is no interference with the car etc.
It is possible to obtain a load collapse prevention device which is less likely to be damaged and has excellent durability. In addition, since the bag and the holding means are sandwiched between the back and forth with respect to the depth direction of the loading platform, a load collapse prevention device can be realized compactly and the storage space can be effectively utilized.

According to the second aspect of the present invention, the cargo is not fixed directly by the bag, but is fixed via the load holding plate. For this reason, even when carrying in / out cargo using a car or the like, the car or the like can be fixed without the bag directly contacting the car or the like. Therefore, it is possible to obtain a load collapse prevention device that is not caught or damaged by interference with a car or the like. And since it is fixed by the load holding plate, the car and the like can be fixed stably. In addition, since only the width of the cargo holding space is required for the load holding plate, it is possible to obtain a light-weight and simple mechanism for preventing collapse of the load.

According to the third aspect of the present invention, since the mounting means is a unit including the bag body and the cargo holding plate, it can be easily mounted in the cargo storage space. Then, after carrying the cargo by inflating the bag body with air, when the cargo is carried out, the bag body can be easily contracted, and the fixation of the cargo can be smoothly released.

According to the fourth aspect of the invention, after the air is discharged from the bag to release the fixation of the cargo, the load holding means can be easily removed. That is, even if air is discharged from the bag, the cargo holding means remains pressed by the cargo, and even if it is difficult to remove the cargo holding means as it is, the cargo holding means itself may be in contact with the cargo. By changing the positional relationship, the cargo can be separated from the cargo holding means, and the cargo can be quickly unloaded.

According to the fifth aspect of the present invention, the positional relationship with the cargo can be easily adjusted by the driving means provided on the load holding means, and the load holding means can be easily removed. Therefore, it is possible to quickly carry out the work of unloading the cargo.

According to the sixth aspect of the present invention, the driving means for adjusting the positional relationship of the cargo holding means with respect to the cargo can be realized by a compact and easy mechanism.

According to the seventh aspect of the present invention, an abnormal operation state such as a case where the air pressure inside the bag does not reach a predetermined value and the bag is not inflated normally is generated. Is constantly monitored, and when an abnormality occurs, it is possible to promptly notify the operator. Therefore, the worker
This can be dealt with at the same time as the occurrence of an abnormality, and the collapse of the load can be prevented.

According to the eighth aspect of the present invention, since the load collapse prevention device can be used without interfering with or being damaged by the car, the load collapse prevention device which exhibits a particularly excellent effect for a car transport vehicle can be provided. Can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a state in which a load collapse prevention device according to the present invention is attached to a truck bed.

FIG. 2 is a schematic diagram showing a state in which the load collapse prevention device according to the present invention is attached to a truck bed.

FIG. 3 is a schematic view showing a mounting means of the load collapse prevention device according to the present invention.

FIG. 4 is a diagram showing a state in which a truck loaded with a car is viewed from an entrance side of a loading platform.

FIG. 5 is a schematic sectional view showing the structure of a load holding means of the load collapse prevention device according to the present invention.

FIG. 6 is a schematic view showing a longitudinal state of the load holding means of the load collapse prevention device according to the present invention.

FIG. 7 is a diagram schematically showing a connection structure between a bag body and an air supply means in the load collapse prevention device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 load collapse prevention device 2 truck 3 carrier 4 cart 5 bag 6 air supply means 7 back wall 9 load holding means 12 lashing rail

Claims (8)

[Claims] 1. A bag attached to a back wall in a cargo storage space for storing and transporting cargo and capable of being expanded and contracted by air, and capable of supplying air to the bag. A cargo collapse prevention device comprising: air supply means; and load holding means attachable to fix the cargo between the bag and a rail disposed in a depth direction of the storage space. 2. The load collapse prevention device according to claim 1, wherein the bag body fixes the cargo via a load holding plate. 3. A mounting means for mounting the bag body to the back wall, a mounting plate disposed facing the back wall, a support means for mounting the bag body on the mounting plate, and the load Connecting means for connecting the holding plate and the mounting plate with the bag interposed therebetween and extending and contracting according to expansion and contraction of the bag, and urging means for urging the load holding plate toward the mounting plate The load collapse prevention device according to claim 2, comprising: 4. The load collapse prevention device according to claim 1, wherein the load holding means can adjust a positional relationship with respect to the cargo in two or more steps. 5. The cargo holding means includes a main body having both ends attachable to a rail disposed in a depth direction of the cargo storage space, a driving means provided on the main body, and the main body provided by the driving means. A push frame movable back and forth in the depth direction of the storage space,
The load collapse prevention device according to claim 4, comprising: 6. The driving means includes a pin provided on the push frame, a cylindrical cam rotatably provided on the main body, and a cam groove provided with a cam groove to be engaged with the pin. The load collapse prevention device according to claim 5, further comprising an operation unit configured to perform the operation. 7. An apparatus according to claim 1, further comprising abnormality monitoring means for detecting an operation state of said bag or said air supply means, and display means for notifying an operator of the detected operation state.
The collapse prevention device according to any one of the above. 8. The cargo storage space is a cargo bed for trucks, and the cargo is loaded and unloaded to and from the cargo bed by a cart. A device for preventing collapse of a cargo described in Crab.