JP2001240180A - Collapse-preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely install and fix a stay between a ceiling and a floor or between side walls in a room. SOLUTION: The extensible and retractable stay 10 to be installed between a ceiling and a floor, or between side walls, which are opposed to each other in a room where a cargo is contained is mainly composed of a large diameter stay member 20 which is slidably fitted onto a small diameter stay member, a small diameter stay member 30, a locking mechanism 50 for locking the small diameter stay member 30 at a position of a predetermined length with respect to the large diameter stay member 20, an adjusting member 40 to be fitted in an extensible and retractable manner with an end of either the small diameter stay member 30 or the large diameter stay member 20, and a length adjusting mechanism 60 for adjusting the projecting length of the adjusting member 40. With these arrangements, a locked state of the locking mechanism 50 is liberated, and the small diameter stay member 30 is extended by a predetermined length from the large diameter stay member 20. Then the locking mechanism 50 is kept in a locked stay, and a rotational operation part 62 is rotated with a wrench or the like. The adjusting member 40 is thus rotated to perform the fine adjustment of a projecting extent of the adjusting member 40, whereby the stay 10 can be reliably installed and fixed between the ceiling and the floor, or between the side walls.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing collapse of cargo, and more particularly to a apparatus for preventing collapse of cargo used, for example, in a truck bed or container.

[0002]

2. Description of the Related Art Generally, when loading cargo onto a truck bed, container, or ship, the cargo may collapse due to shaking or vibration during traveling or navigating. Therefore, it is necessary to prevent individual cargo from moving. .

[0003] Therefore, in the past, a load collapse prevention device having a stay installed between the ceiling, the floor or the side wall facing the room for storing the cargo has been used.

[0004] As this kind of conventional load collapse prevention device,
For example, a so-called rack system in which one of the stay members slidably fitted to each other is provided with a rack along the longitudinal direction, and the other stay member is provided with a pinion that meshes with the rack and a lever that rotates the pinion. A through hole is provided on one side surface of a stay member slidably fitted to each other, and a plurality of through holes are provided on the other stay member at appropriate intervals along the longitudinal direction. A so-called pin type in which a stopper pin is fitted in a through hole in which the members match, or a so-called belt in which an end of a stay member slidably fitted to each other and a ceiling, a floor, or a side wall are fixed with a stretchable belt. A method is used.

[0005]

However, in the above-mentioned rack type and pin type, since the length adjustment is determined by the number of teeth of the rack and the interval between through holes, fine adjustment of the length is not perfect, and the transportation is not complete. There was a risk that the stay was loosened and came off. In order to solve this problem, it is conceivable to reduce the pitch between the teeth of the rack and the through holes. However, reducing the pitch increases the cost and reduces the strength. Although the above-mentioned belt type can be finely adjusted, there is a problem in that the belt cannot be maintained in a straight state due to the expansion and contraction of the belt during transportation, and as a result, the collapse of the load cannot be sufficiently prevented. Was.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a device for preventing collapse of a load, which can securely install and fix a stay between a ceiling, a floor, or between side walls. .

[0007]

In order to achieve the above object, the invention according to claim 1 comprises an extendable stay which is installed between opposed ceilings, floors or side walls of a room for storing cargo. And the stay is provided with:
A large-diameter stay member slidably fitted to each other, a small-diameter stay member, a locking mechanism for locking the small-diameter stay member to a predetermined length position with respect to the large-diameter stay member, and the small-diameter stay It is characterized by comprising an adjusting member fitted to the end of the member or the large-diameter stay member so as to be extendable and contractable, and a length adjusting mechanism for adjusting a projecting length of the adjusting member.

[0008] With this configuration, the large-diameter stay member and the small-diameter stay member are extended to a length slightly shorter than the dimension between the ceiling, floor, or side wall to be erected, and are extended to a predetermined length by the locking mechanism. In the locked state, the length of the adjustment member can be finely adjusted by the length adjustment mechanism.
Therefore, the ends of the large-diameter stay member and the small-diameter stay member are pressed against the ceiling surface, the floor surface, or the side wall surface, so that the stay can be reliably installed and fixed.

According to a second aspect of the present invention, in the load collapse prevention device according to the first aspect, the length adjusting mechanism includes a female screw portion provided in an opening of the small diameter stay member or the large diameter stay member, and the female screw portion. And an adjusting member having an external thread portion screwed into the adjusting member, and a rotation operation portion formed integrally with the adjusting member and rotating the adjusting member.
In this case, it is preferable that the adjusting member is rotatably mounted on an end portion thereof and further includes an engaging member that is in contact with a ceiling surface, a floor surface, or a side wall surface.

[0010] With this configuration, when the adjusting member is rotated by the rotation operating portion, the male screw portion provided on the adjusting member and the female screw portion provided on the small diameter stay member or the large diameter stay member are screwed. Since the adjusting member is in the mating state, the adjusting member can be slightly protruded from the small diameter stay member or the large diameter stay member.

According to a fourth aspect of the present invention, in the load collapse prevention device according to the first or third aspect, the small-diameter stay member or the large-diameter stay member and the end of the adjusting member are mounted on a ceiling surface, a floor surface, or a side wall surface. An abutting engagement member is attached, and a non-slip member is provided on the abutment surface of the engagement member.

With this configuration, the non-slip member provided on the contact surface of the small-diameter stay member or the large-diameter stay member and the engaging member attached to the end of the adjusting member can be used as a ceiling surface or a floor surface. Alternatively, since the abutment is in contact with the side wall surface, the stay can be more reliably installed and fixed between the ceiling, the floor, or between the side walls.

According to a fifth aspect of the present invention, in the device for preventing collapse of the load according to the first aspect, projections are provided at ends of the small-diameter stay member or the large-diameter stay member and the adjusting member, and a ceiling surface and a floor surface are provided. Alternatively, it is characterized in that a rail member fixed to the side wall surface is provided at appropriate intervals along the longitudinal direction of the rail member, and a locking receiving portion for fitting the projection is formed. .

[0014] With such a configuration, the small-diameter stay member or the large-diameter stay member and the protrusion protruding from the ends of the adjusting member are provided on the rail member fixed to the ceiling surface, the floor surface, or the side wall surface. The stay can be fitted to the predetermined locking receiving portion, so that the stay can be more securely mounted and fixed.

According to a sixth aspect of the present invention, in the load collapse prevention device of the first aspect, the locking mechanism is mounted on a large-diameter stay member so as to be swingable, and has a lever having a locking ridge at a tip. A plurality of projection rows provided in the longitudinal direction of the small-diameter stay member to engage with the locking projections of the lever; and a spring for urging the elastic force in a direction in which the locking projections of the lever engage with the projection rows. And a member. In this case, it is preferable to form the small-diameter stay member into a C-shaped cross section having an opening extending in the longitudinal direction, and to form a projection row on the inner surface facing the opening.

With this configuration, the lever is swung against the elastic force of the spring to release the engagement between the projection and the row of projections, and the small-diameter stay member is separated from the large-diameter stay member by a predetermined length. After the extension, the small-diameter stay member can be locked at a predetermined length by engaging the protrusions of the lever with the protrusion row by the elastic force of the spring member. Therefore, the stay can be easily positioned between the ceiling, the floor, or between the side walls by the lever operation. In this case, the small-diameter stay member is formed in a C-shaped cross section having an opening along the longitudinal direction, and the projection row is formed on the inner surface facing the opening, thereby reducing the material and weight of the small-diameter stay member, and thus the stay. And cost reduction can be achieved (claim 7).

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an apparatus for preventing collapse of a load according to the present invention.

First Embodiment FIG. 1 is a side view showing a first embodiment of a load collapse prevention device of the present invention, FIG. 2 is a view taken in the direction of the arrow II in FIG. 1, and FIG. 3 is a locking mechanism in the load collapse prevention device. FIG. 4 is an enlarged sectional view showing a main part of the locking mechanism, FIG. 5 is an enlarged sectional view showing a length adjusting mechanism in the load collapse prevention device, and FIGS. 6 and 7 are load collapse prevention devices. It is a schematic side view which shows the use condition of.

The above-mentioned collapse prevention device is provided with an extendable stay 10 which is installed between opposed ceilings 2 and floors 3 or between side walls 4 of a room 5 for accommodating a cargo 1 formed on a truck bed (not shown). It is mainly composed.

The stay 10 includes a large-diameter stay member 20, a small-diameter stay member 30, and a small-diameter stay member 30, which are slidably fitted to each other.
An adjusting member 40 that is slidably fitted to the small-diameter stay member 30, that is, the protrusion amount is adjustable; and a locking mechanism 50 that locks the small-diameter stay member 30 at a predetermined length position with respect to the large-diameter stay member 20. And a length adjustment mechanism 60 that adjusts the length of protrusion of the adjustment member 40.

In this case, the large-diameter stay member 20 is formed of an aluminum alloy pipe, and at one end thereof, an engaging member 70 which is in contact with the ceiling 2, the floor 3 or the side wall 4 is mounted. An opening 22 is formed on one side of the end to open the end. In this case, the engaging member 70 is
A contact plate portion 71 that contacts and engages the floor 3 or the side wall 4 and a pair of mounting pieces 7 that stand upright from one side surface of the contact plate portion 71
2 and a rubber sheet-shaped non-slip member 80 is adhered to the surface of the contact plate 71. In order to attach the engaging member 70 to the large-diameter stay member 20, the attaching piece 25 of the attaching member 24 fitted to the end of the large-diameter stay member 20 is inserted between the two attaching pieces 72. 25 through the connecting pin 73. The connection pin 73 is provided with a retaining prevention.

The small-diameter stay member 30 is formed to have a diameter slightly smaller than the inner diameter of the large-diameter stay member 20, and a slit 32 (opening) that matches the opening 22 provided at the end of the large-diameter stay member 20 in the longitudinal direction. Is formed of an extruded aluminum alloy material having a substantially C-shaped cross section.
The length adjustment member 31 is fitted into the inner surface facing the second member 2 (see FIGS. 3 and 4). In this case, the length adjusting member 31
Is formed of an extruded aluminum alloy material,
A pair of wall pieces 33 facing each other with a width equal to the width of the opening 22 and the slit 32 and a connecting piece 34 connecting bottom portions of both wall pieces 33 are provided. The connecting piece 34
A plurality of ridges 35 (in the drawing, four ridges are shown) extending in the longitudinal direction are formed on the side surface of the opening.
Is partially crushed by, for example, knurling, pressing, or the like within the effective sliding range of the small-diameter stay member 30 to form a large number of projection rows 36 that constitute a part of a locking mechanism 50 described later.

As shown in FIGS. 1 to 4, the locking mechanism 50 has a bracket 51 provided over the opening 22 of the large-diameter stay member 20, and is mounted on the bracket 51 so as to be swingable. A lever 53 having a locking ridge 52, a plurality of projection rows 36 provided in the longitudinal direction of the small diameter stay member 30 and meshing with the locking ridge 52 of the lever 53, and a locking ridge 52 of the lever 53 It mainly comprises a spring member 54 for urging an elastic force in the direction in which the row 36 meshes.

In this case, as shown in FIGS. 3 and 4, the bracket 51 is provided with a pair of mounting portions 51a fixed with rivets 55 on both sides of the opening 22 of the large-diameter stay member 20.
And an aluminum casting member having a pair of substantially triangular side pieces 51b extending above the mounting portions 51a and connecting pieces 51c connecting the side portions of both side pieces 51b. Then, the through hole 51 provided in the side piece 51b is provided.
The lever 53 is swingably mounted by a pivot pin 56 penetrating d. As shown in FIGS. 3 and 4, the lever 53 has a rack shoe 51e formed with a plurality of locking projections 52 which can be engaged with the projections 35 (projection rows 36).
The rack shoe 51e is provided so as to face the projection row 36 of the small-diameter stay member 30 between the side pieces 51b of the bracket 51 and the opening 22 of the large-diameter stay member 20. I have. Arm 51
f, a pin insertion groove 5 into which the pivot pin 56 is inserted.
1 g is provided (see FIG. 4). Also, the connecting piece 51
c, a spring receiving projection 51h formed on the inner surface of
A spring member, for example, a compression spring 54 is contracted between the spring receiving portion 51i protruding from the side surface of the arm 3 and the elastic force in the direction in which the arm 51f is opened is urged by the lever 53 by the compression spring 54. Therefore, lever 5
When the third member 3 is rotated against the elastic force of the compression spring 54, the engagement between the projection row 36 and the locking ridge 52 is released, so that the small-diameter stay member 30 expands and contracts with respect to the large-diameter stay member 20. Thus, a predetermined length position can be obtained.
After the small-diameter stay member 30 is expanded and contracted to a predetermined length in this manner, when the finger pressure of the lever 53 is released, the locking ridge 52 engages with the projection row 36 of the small-diameter stay member 30 by the elastic force of the compression spring 54. And the small diameter stay member 30
Movement is regulated. Thus, in use, the small-diameter stay member 30 can be locked at a predetermined position with respect to the large-diameter stay member 20, and the length of the large-diameter stay member 20 and the small-diameter stay member 30 is extended between the ceiling 2, the floor 3, or the side wall. The dimension can be set slightly smaller than the distance between the four. When not in use, the small-diameter stay member 30 can be locked in a state of being stored in the large-diameter stay member 20.

The length adjusting mechanism 60 includes a female screw portion 61 provided in an opening on the distal end side of the small-diameter stay member 30,
It mainly includes an adjusting member 40 having a female screw portion 41 screwed into the female screw portion 61 and a rotation operation portion 62 formed integrally with the adjusting member 40 and rotating the adjusting member 40. In this case, the female screw portion 61 is
Is formed by a nut which is fitted into the opening on the tip side of the nut and is fixed by welding W (see FIG. 5). Further, as shown in FIG. 5, the rotation operation part 62 is formed of a hexagon nut screwed to a screw shaft forming the adjustment member 40 and integrally fixed by welding W, and is a tool such as a spanner. Is engaged, the adjusting member 40 is rotated in the forward and reverse directions, and the adjusting member 40 can be linearly moved with respect to the small-diameter stay member 30. Also, the adjusting member 4
An engaging member 70A that is in contact with a ceiling surface, a floor surface, or a side wall surface is rotatably mounted at the leading end of the “0”. In this case, as shown in FIG.
4, a trunk portion 75 protruding from the periphery of the circular base portion 74 in an expanded taper shape, and a flange portion 76 bent outward from the tip of the trunk portion 75, and formed in a substantially hat shape in cross section. I have. A through hole 77 is formed in the center of the circular base 74 of the adjustment member 40 formed in this manner, and the tip of the adjustment member 40 is loosely fitted in the through hole 77, and the protrusion is prevented from falling off. A nut 78 for prevention is fixed with a set screw 79. Similarly to the engagement member 70, a rubber sheet-shaped non-slip member 80A is attached to the contact surface of the engagement member 70A, that is, the surface of the flange portion 76.

In order to prevent the cargo 1 from collapsing by using the cargo collapse prevention device configured as described above, first, the lever 53 is pressed against the urging force of the compression spring 54 of the locking mechanism 50.
To disengage the engagement between the locking projection 52 and the projection row 36, and then connect the small-diameter stay member 30 to the large-diameter stay member 20.
Pull out the stay 10 from the
Is extended to the vicinity of the ceiling 2, floor 3 or side wall 4 where the bridge is to be installed, the lever 53 is released, and the locking projection 52 and the projection row 36 are engaged with each other, so that the small-diameter stay member 30 has a predetermined length. To lock. With or after this extension operation, the engagement member 70 attached to the small-diameter stay member 30 is attached.
The flange portion 76 and the non-slip member 80 of A are in contact with one of the floor 3 and the side wall 4. In this state, when a wrench (not shown) is engaged with the rotation operation part 62 and the rotation operation part 62 and the adjustment member 40 are rotated clockwise, the male screw part 41 and the female screw part 61 are in a threaded state. The adjusting member 40 moves (extends) to the outside of the small-diameter stay member 30, and the abutting plate portion 7 of the engaging member 70 attached to the large-diameter stay member 20.
1 and the non-slip member 80 press against the other of the ceiling 2 or the side wall 4. In this manner, the stay 10 can be installed between the ceiling 2 and the floor 3 (see FIG. 6) or between the side walls 4 (see FIG. 7). In this state, since the non-slip member 80 is in close contact with the ceiling 2, the floor 3, or the side wall 4, the stay 10 does not come off. In this state, the small-diameter stay member 30 and the large-diameter stay member 20
Are locked and fixed by a locking mechanism 50. Therefore, the length of the stay 10 does not change during transportation.

In order to remove the erected stay 10, a tool such as a wrench is engaged with the rotating operation part 62 and the rotating operation part 62 and the adjusting member 40 are rotated counterclockwise as described above. Numeral 40 moves (shrinks) inwardly of the small-diameter stay member 30, and the engaging members 70 and 70A and the non-slip members 80 and 80A attached to the large-diameter stay member 20 and the small-diameter stay member 30 are used for the ceiling 2 and the floor 3 respectively. Or side wall 4
Away from, the erection state is released. After releasing the erection state, the lever 53 of the locking mechanism 50 is
Is pressed down against the elastic force of
When the small-diameter stay member 30 is stored in the large-diameter stay member 20 in a state in which the engagement with the
Can be easily transported and stored.

Second Embodiment FIG. 8 is a side view showing a part of a second embodiment of the load collapse prevention device of the present invention in cross section, and FIG. 9 is a perspective view showing a rail member in the second embodiment.

The second embodiment is a case in which the stay 10 is securely engaged with the ceiling 2, the floor 3, or the side wall 4 to strengthen the erected state. That is, the protrusions 90 are provided at the ends of the large-diameter stay member 20 and the adjustment member 40, and the ceiling 2, the floor 3
Alternatively, the lock receiving portion 1 is provided on the rail member 100 fixed to the surface of the side wall 4 at an appropriate interval along the longitudinal direction of the rail member 100 and fits the projection 90.
10 is formed.

In this case, the projection 90 projecting from the large-diameter stay member 20 is connected to the large-diameter stay member 2 formed by a pipe.
0, which is formed by a protruding shaft protruding from the tip of a fixed cylindrical body 91 which is inserted into the end opening of the fixing member 91 and which is bonded by brazing, welding, or an adhesive, and protruding from the adjusting member 40. Is formed by cutting the tip end side of the adjusting member 40 in a stepped manner.

The rail member 100 is shown in FIGS.
As shown in the figure, the base 101 is bent in a trapezoidal shape, and is formed of an aluminum alloy extruded shape having a substantially hat-shaped cross section in which outward flanges 102 are provided at both ends of the base 101. For example, it is fixed to the side wall 4. The base 101 of the rail member 100 includes
A plurality of circular holes 110 are formed at appropriate intervals along the longitudinal direction of the rail member 100 as locking receiving portions into which the projections 90 can be fitted. A substantially I-shaped cutout hole 111 is formed in the base 101 of the rail member 100 outside the circular hole 110 between the circular holes 110 to reduce the weight of the rail member 100.

In the second embodiment, the other parts are the same as those in the first embodiment. Therefore, the same parts are denoted by the same reference numerals and description thereof will be omitted.

In order to prevent the cargo 1 from collapsing using the cargo collapse prevention device of the second embodiment configured as described above,
First, as shown in the first embodiment, the compression spring 5
4, the small-diameter stay member 30 is pulled out of the large-diameter stay member 20 in a state in which the lever 53 of the locking mechanism 50 is pressed down against the urging force to release the engagement between the locking ridge 52 and the projection row 36. After extending the entire length of the stay 10 to the vicinity of the ceiling 2, the floor 3 or the side wall 4 where the stay 10 is erected, the depression of the lever 53 is released to release the compression spring 5.
The engagement protrusion 52 and the projection row 36 are engaged with each other by urging of the elastic force to lock the protrusion length position of the small-diameter stay member 30.
Fix it. With or after this extension operation,
The protrusion 90 projecting from the adjusting member 40 is fitted into a predetermined locking receiving circular hole 110 of the rail member 100 attached to one of the floor 3 and the side wall 4. In this state, a tool such as a wrench is engaged with the rotary operation
When the adjustment member 40 is rotated clockwise, the adjustment member 4 is rotated.
Numeral 0 moves (extends) to the outside of the small-diameter stay member 30 so that the projection 90 protruding from the large-diameter stay member 20 is fixed to the rail member 100 attached to the other of the ceiling 2 or the side wall 4. Into the circular hole 110 for use. In this manner, the stay 10 can be installed between the ceiling 2 and the floor 3 or between the side walls 4. Therefore, the stay 10 can be firmly installed.

When the installed stay 10 is to be removed, a tool such as a wrench is engaged with the rotary operation part 62 in the same manner as in the first embodiment, and the rotary operation part 62 and the adjusting member 4 are adjusted.
0 is rotated in the counterclockwise direction, and the protrusion 90 provided on the large-diameter stay member 20 and the adjustment member 40 is inserted into the circular hole 11 of the rail member 100 attached to the ceiling 2, the floor 3 or the side wall 4.
It may be pulled out from zero to release the erection state.

Other Embodiments (1) In the above embodiment, the case where the adjusting member 40 is attached to the end of the small-diameter stay member 30 via the length adjusting mechanism 60 has been described. You may make it attach to the end part of the stay member 20. That is, as shown in FIG. 10, the adjusting member 40 is attached to the end of the large-diameter stay member 20 via the length adjusting mechanism 60, and the engaging member 70A is rotatably attached to the tip of the adjusting member 40. The engaging member 7 is attached to the end of the small-diameter stay member 30.
0 may be attached. In this case, the female screw 6
Numeral 1 is formed by a nut fitted to the end of the large-diameter stay member 20 and fixed by welding or the like. In order to attach the engaging member 70 to the small-diameter stay member 30, the attaching piece 25 of the attaching member 24 fitted to the end of the small-diameter stay member 20 is inserted between the attaching pieces 72 of the engaging member 70. This is performed by penetrating the connecting pins 73 through the mounting pieces 72 and 25. The connection pin 73 is provided with a retaining prevention. The rail member 100 may be attached to the ceiling 2, the floor 3, or the side wall 4 by using the projection 90 of the second embodiment instead of the engagement members 70, 70A.

(2) In the above embodiment, one stay 1
Although the case where the zero is erected to prevent the collapse of the cargo 1 has been described, the collapse of the cargo 1 may be prevented by using a plurality of stays 10 as necessary. For example, as shown in FIG. 6, when a stay 10 is installed between the ceiling 2 and the floor 3, it is more reliable to install a plurality of stays 10 at intervals to prevent collapse of the cargo 1. it can.

[0037]

As described above, the load collapse prevention device of the present invention is configured as described above, so that the following effects can be obtained.

(1) According to the first aspect of the present invention, the large-diameter stay member and the small-diameter stay member are extended to a length slightly shorter than the dimension between the ceiling, the floor, or the side walls to be installed. The length of the adjustment member can be finely adjusted by the length adjustment mechanism in a state where the adjustment member is locked at a predetermined length position, so that the ends of the large-diameter stay member and the small-diameter stay member are fixed to the ceiling surface and the floor surface. Or, press against the side wall to securely install the stay.
Can be fixed.

(2) According to the second and third aspects of the present invention,
By rotating the adjusting member with the rotating operation portion, the male screw portion provided on the adjusting member and the female screw portion provided on the small-diameter stay member or the large-diameter stay member are in a threaded state. A small amount can be projected from the member or the large-diameter stay member.

(3) According to the fourth aspect of the invention, the non-slip member provided on the contact surface of the small diameter stay member or the large diameter stay member and the engaging member attached to the end of the adjustment member is provided. Since the abutment is in contact with the ceiling surface, the floor surface, or the side wall surface, in addition to the above (1), the stay can be more reliably installed and fixed between the ceiling, floor, or side wall.

(4) According to the fifth aspect of the present invention, the small-diameter stay member or the large-diameter stay member and the projections protruding from the ends of the adjusting member are fixed to the ceiling surface, the floor surface, or the side wall surface. Since it can be fitted to a predetermined locking receiving portion provided on the rail member, the stay can be further erected and fixed in addition to the above (1).

(5) According to the invention described in claim 6, the lever is swung against the elastic force of the spring to release the engagement between the ridge and the row of projections, and the small-diameter stay member is connected to the large-diameter stay. After extending a predetermined length from the member, the small-diameter stay member can be locked at a predetermined length position by engaging the ridge of the lever with the row of protrusions by the elastic force of the spring member.
In addition to the above, the stay can be easily positioned between the ceiling, floor or side wall by the lever operation.

(6) According to the seventh aspect of the present invention, the small-diameter stay member is formed to have a C-shaped cross section having an opening extending in the longitudinal direction, and a row of projections is formed on the inner surface facing the opening. The material and weight of the stay member and thus the stay can be reduced, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of a load collapse prevention device according to the present invention.

FIG. 2 is a view taken in the direction of the arrow II in FIG.

FIG. 3 is an exploded perspective view showing a locking mechanism according to the present invention.

FIG. 4 is an enlarged sectional view showing a main part of the locking mechanism.

FIG. 5 is an enlarged sectional view showing a length adjusting mechanism according to the present invention.

FIG. 6 is a schematic side view showing an example of a use state of the load collapse prevention device of the present invention.

FIG. 7 is a schematic sectional view showing another example of a use state of the load collapse prevention device.

FIG. 8 is a side view showing a cross section of a part of the second embodiment of the load collapse prevention device of the present invention.

FIG. 9 is a perspective view showing a rail member according to the second embodiment.

FIG. 10 is a side view showing a third embodiment of the load collapse prevention device of the present invention.

[Description of Signs] 2 ceiling 3 floor 4 side wall 5 chamber 10 stay 20 large diameter stay member 22 opening 30 small diameter stay member 32 slit (opening) 35 ridge 36 projection row 40 adjusting member 41 male screw part 50 locking mechanism 52 locking Ridge 53 Lever 54 Compression spring (spring member) 60 Length adjusting mechanism 61 Female screw part 62 Rotating operation part 70, 70A Engaging member 80, 80A Non-slip member 90 Projection 100 Rail member 110 Circular hole (lock receiving part)

Claims (7)

[Claims] An apparatus for preventing collapse of a cargo, comprising an extendable stay installed between opposed ceilings, floors or side walls of a room for storing cargo, wherein the stays are slidably fitted to each other. A large diameter stay member, a small diameter stay member, a locking mechanism for locking the small diameter stay member at a predetermined length position with respect to the large diameter stay member, and the small diameter stay member or the large diameter stay member. An apparatus for preventing collapse of a load, comprising: an adjusting member fitted to an end portion so as to be extendable and contractable; and a length adjusting mechanism for adjusting a protruding length of the adjusting member. 2. The load collapse prevention device according to claim 1, wherein the length adjusting mechanism includes a female screw portion provided in an opening of the small diameter stay member or the large diameter stay member, and a male screw portion screwed into the female screw portion. And a rotation operating unit formed integrally with the adjustment member and configured to rotate the adjustment member. 3. An apparatus according to claim 2, further comprising an engaging member rotatably mounted on an end of said adjusting member and abutting on a ceiling surface, a floor surface, or a side wall surface. A load collapse prevention device characterized in that: 4. An apparatus according to claim 1, wherein said small-diameter stay member or large-diameter stay member and an end of said adjusting member are provided with an engaging member which abuts a ceiling surface, a floor surface or a side wall surface. An apparatus for preventing collapse of a load, comprising a non-slip member mounted on a contact surface of the engaging member. 5. The load collapse prevention device according to claim 1, wherein projections are provided at ends of the small-diameter stay member or the large-diameter stay member and the adjusting member, and are fixed to a ceiling surface, a floor surface, or a side wall surface. A load collapsing prevention device characterized in that a rail member to be provided is provided at appropriate intervals along the longitudinal direction of the rail member, and a locking receiving portion for fitting the projection is formed. 6. The load collapse prevention device according to claim 1, wherein the locking mechanism is swingably mounted on the large-diameter stay member, and has a lever having a locking ridge at a tip thereof, and a longitudinal axis of the small-diameter stay member. A plurality of rows of projections provided in the direction, and meshing with the locking projections of the lever, and a spring member for urging the elastic force in a direction in which the locking projections of the lever mesh with the projection rows. Load collapse prevention device characterized by the above-mentioned. 7. The load collapse prevention device according to claim 6, wherein the small-diameter stay member is formed in a C-shaped cross section having an opening along a longitudinal direction, and a row of projections is formed on an inner surface facing the opening. An apparatus for preventing collapse of cargo.