JP2003212237A - Vibration-isolating pallet for carriage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration-isolating pallet for carriage which can carry articles while preventing the articles from being damaged by vibrations. <P>SOLUTION: The vibration-isolating pallet for carrying articles comprises a rectangular base frame 2, a plurality of pneumatic springs 25 which are provided on a plurality of parts on an upper side of the base frame and capable of regulating the pneumatic pressure, and a loading frame 31 which is elastically supported on the base frame by the pneumatic springs with the articles loaded on the upper side thereof. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier vibration isolation pallet for carrying a product that may be damaged by vibration of electronic equipment, precision equipment and the like.

[0002]

2. Description of the Related Art A vehicle such as a truck is used as a means for conveying a conveyed object. When there is a risk of damage to the transported object due to vibration such as electronic equipment or precision equipment, the suspension is a leaf spring in a normal vehicle, so the vibration damping ability is poor and it may be caused by unevenness on the road. The generated vibration is easily transmitted to the platform. Therefore, there is a possibility that the conveyed object may be damaged by vibration during conveyance.

Therefore, when carrying an article such as an electronic device or a precision instrument, a vehicle having an air suspension is used in order to make it difficult for vibrations during the article to be transmitted to the article. In a vehicle having an air suspension, vibration caused by unevenness of a traveling path is absorbed and damped by the air suspension, and thus it is difficult for the vibration to be transmitted to a conveyed object loaded on a bed of the vehicle. Therefore, it is possible to carry the transported object without damaging it.

However, since a vehicle having an air suspension is expensive, use of the vehicle causes a high transportation cost, which is an economical problem.

On the other hand, even if the conveyed object is conveyed by a vehicle having an air suspension, when the conveyed object is unloaded from the vehicle and moved in the factory, the conveyed object is placed on a pallet and is forklifted through the pallet. Be transported. In that case, the vibration accompanying the traveling of the forklift is transmitted to the conveyed product via the pallet, and the vibration may damage the conveyed product.

[0006]

As described above, when an object to be conveyed is conveyed, it is possible to convey the object without damaging the object by using a vehicle having an air suspension. Since vehicles are expensive, transportation costs may increase,
Further, since the vibration is easily transmitted to the transported object by the forklift transportation, the transported object may be damaged.

An object of the present invention is to provide a carrier-free vibration isolation pallet which can be carried without damaging the object to be carried by the vibration generated during the carrying even without using a vehicle having an air suspension.

[0008]

According to a first aspect of the invention, in a carrier vibration isolating pallet for carrying a product, a rectangular base frame and air pressure adjustments provided at a plurality of positions on the upper surface of the base frame. A carrier-isolated pallet, comprising a plurality of possible air springs, and a mounting frame that is elastically supported by the air springs on the base frame and on which the transported object is mounted. is there.

According to a second aspect of the present invention, caster members are provided at the four corners of the lower surface of the base frame, and among the four caster members, at least one pair of caster members located on one end side in the predetermined direction is the base frame. The vibration isolating pallet for transport according to claim 1, wherein the vibration isolating pallet is detachably provided.

According to a third aspect of the present invention, the caster member detachably provided on the base frame is a pedestal, a leg member having one end rotatably attached to the pedestal, and a rotation axis line at the other end of the leg member. And a wheel rotatably provided substantially orthogonal to the rotation axis of the leg member with respect to the pedestal, and a holding member for removably engaging and holding the pedestal is provided on the lower surface of the base frame. The vibration isolating pallet for transport according to claim 2.

According to a fourth aspect of the present invention, a pair of caster members located on one end side in the predetermined direction of the base frame is removed and the base frame is tilted, and the base frame is tilted at the lower end in the tilt direction. 3. The vibration isolating pallet for transport according to claim 2, further comprising a connecting member that connects one end of a slope member forming an inclined surface having substantially the same angle as the inclined surface of the mounting frame.

According to a fifth aspect of the present invention, the caster member is lifted by lifting one end side of the vibration isolation pallet by using a lifter member as a lever in a state where the transported object is placed on the mounting frame. When detached from the base frame, an engaging member serving as a fulcrum of rotation of the lifter member is provided at one end side in the predetermined direction of the base frame so as to be rotatably engaged with the lifter member. The vibration-isolating pallet for transportation according to claim 2.

According to a sixth aspect of the present invention, in the above-mentioned mounting frame,
2. The vibration isolating pallet for transport according to claim 1, wherein the amount of displacement of the transport object in the upward direction by the restoring force of the air spring is limited by the regulating member when the transport object is unloaded from the mounting frame. .

According to the present invention, the mounting frame is provided on the base frame via the air spring whose air pressure can be adjusted, and the transported object is mounted on the mounting frame. Therefore, the vibration generated at the time of transportation is absorbed by the air spring and is difficult to be transmitted to the transported object on the mounting frame.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 (a) is a plan view of the carrier vibration isolation pallet 1, and FIG. 1 (b) is a side view of the same. This carrier vibration isolation pallet 1 includes a base frame 2. As shown in FIGS. 2 (a) to 2 (c), the base frame 2 connects a plurality of girder members 3 formed by bending rolled steel plates in a U-shaped cross section into a rectangular frame shape, and a pair of facing girder members. 3 are connected by square pipes 4, respectively.

Of the four corners of the lower surface of the base frame 2, a first caster member 5 is detachably provided on the lower surface of each of the pair of corner portions located on one end side in the predetermined direction of the base frame 2, and on the other end side. A second caster member 6 is fixedly provided on the lower surfaces of the pair of corners.

The first caster member 5 has a pedestal 12 having a rectangular mounting plate 11 as shown in FIG. One end of a leg member 13 is rotatably connected to the pedestal 12 about an axis perpendicular to the plate surface of the pedestal 12. At the other end of the leg member 13, a wheel 14 is rotatably provided with its axis of rotation orthogonal to the axis of rotation of the leg member 13.

A holding member 16 having a U-shaped engaging portion 15 at both ends is joined and fixed to a lower surface corner portion of the base frame 2 on one end side in a predetermined direction, that is, an end lower surface of the girder material 3. There is. Then, the mounting plate 11 of the first caster member 5 is detachably attached to the holding member 16. That is, the pair of first caster members 5 is detachably provided on the base frame 2.

The first caster member 5 is the holding member 1.
It can be fixed to the girder member 3 of the base frame 2 by a screw (not shown) in a state of being mounted on the base member 6.

The second caster member 6 is shown in FIG.
As shown in FIG. 2, a leg member 17 having one end fixed to the lower surface of the end of the beam member 3 of the base frame 2, a wheel 18 rotatably provided at the other end of the leg member 17, and the leg member 17 are provided. The brake pedal 19 is provided. By operating the brake petals 19, it is possible to prevent the rotation of the wheels 18, so that the base frame 2 movably supported by the first and second caster members 5 and 6 cannot run. Can be fixed to.

A notch 21 that is open to the outer peripheral surface of the base frame 2 is formed at the longitudinal center of the girder member 3 located at one end of the base frame 2 in the predetermined direction. On the upper surface of the girder material 3 corresponding to the cutout portion 21,
Engaging members 22 formed by bending a rod into a U shape are provided with both ends fixed. This engaging member 22 is used to convey the article W (see FIG. 7).
It is used when one end side in the predetermined direction of the vibration isolating pallet 1 for transportation on which (a) is attached is shown when it is lifted as a lever.

Incidentally, although details of the conveyed article W are not shown,
For example, the precision equipment is housed in a box-shaped body having casters on the bottom surface.

The lifter member 50 is shown in FIG.
As shown in (b), a pair of levers 51 are connected by a plurality of bars 52 at a predetermined interval. The tip of the lever 51 is formed into a bent portion 53 bent in a dogleg shape, and a caster 54 is rotatably attached to the bent portion 53.
An L-shaped locking piece 55 is provided on the side surface of the pair of levers 51 slightly above the bent portion 53 and on the bent side of the bent portion 53.
Is provided.

A plurality of locking rods 23 are fixed to both sides of the base frame 2 intersecting with the predetermined direction with their upper ends protruding toward the upper surface of the base frame 2. The locking rod 23 is used to engage a rope (not shown) when the base frame 2 is secured to a truck bed or the like.

On the upper surfaces of both ends of the girder member 3 of the base frame 2, there are provided mounts 24 in which a plate member is bent in an inverted U shape as shown in FIGS. An air spring 25 is provided on each of the four mounts 24 with their lower ends fixed.

Each air spring 25 has a hollow elastic portion 2 made of an elastic material such as rubber as shown in FIG. 1 (b).
6, a metal mounting portion 27 integrally provided with the hollow elastic portion 26 on the upper end of the hollow elastic portion 26, and the mounting portion 2
7 has a valve section 28, and this valve section 28
To supply compressed air to the hollow elastic portion 26.
It can be discharged. That is, the air spring 25
The spring constant can be set by the pressure of the compressed air supplied to the hollow elastic portion 26.

A mounting frame 31 is provided above the base frame 2. This mounting frame 31 is
As shown in FIGS. 3A to 3C, similar to the base frame 2, a plurality of girder members 3 formed by bending a rolled steel plate in a U-shaped cross section are connected in a rectangular frame shape, and a pair of facing pairs is used. A frame body 33 is formed by connecting the beam members 3 with square pipes 4, and a deck board 34 is provided on the upper surface of the frame body 33.

The deck board 34 is formed to have substantially the same length in the predetermined direction of the mounting frame 31, and is formed to be narrower than the mounting frame 31 in the width direction intersecting with the predetermined direction. . Thereby, the mounting frame 31
Both ends of the frame body 33 in the width direction are exposed.

The above-mentioned mounting frame 31 is provided by joining the four corners of the lower surface to the upper surface of the mounting portion 27 of the air spring 25. As shown in FIG. 1, the valve portion 28 of the air spring 25 projects from the upper surface of the frame 33 of the placement frame 31, and the projecting portion is attached and fixed to the placement frame 31 by the nut 35. That is, the mounting frame 31 is integrally connected to the base frame 2 via the air spring 25.

A plurality of I bolts 36 are provided at predetermined intervals on the upper surfaces of both ends of the mounting frame 31 in the width direction. The I-bolt 36 is used to engage a rope (not shown) for securing the article W placed on the placing frame 31.

The above-mentioned mounting frame 31 and base frame 2
1A and 1B, when the conveyed article W is unloaded from the mounting frame 31, the mounting frame 31 is largely expanded by the restoring force of the air spring 25. A restricting member 38 that restricts rising is provided.

The restriction member 38 has a screw shaft 39 slidably penetrating the mounting frame 31 and the base frame 2 with the head portion 39a being the lower surface side of the base frame 31, and the screw shaft 39 of the screw shaft 39. The mounting frame 31 includes a nut 40 that is screwed into a screw portion that protrudes to the upper surface side.

Therefore, depending on the amount of tightening of the nut 40, when the load (conveyance W) is removed from the mounting frame 31, the distance by which the mounting frame 31 is displaced upward by the restoring force of the air spring 25 is increased. It is becoming restricted. That is, when the article W is unloaded from the loading frame 31, the distance that the loading frame 31 rapidly rises is limited, so that the unloading can be performed safely.

One end surface of the mounting frame 31 in the predetermined direction,
That is, a pair of connecting members 43 are provided on the end surface on the first caster member 5 side at predetermined intervals in a direction intersecting the predetermined direction. As shown in FIG. 1A, the connecting member 43 is made of a strip-shaped member, and both ends of the connecting member 43 are described above.
It is fixed to the end surface of No. 1 and the midway portion forms a gap 44 with the end surface of the mounting frame 31 at a predetermined interval.

In the gap 44, when the pair of first caster members 5 provided at one end of the base frame 2 are removed and the carrier vibration isolation pallet 1 is tilted as will be described later, the upper surface thereof is placed. The slope member 45 is connected so as to be inclined at substantially the same angle as the frame 31.

The slope member 45 is shown in FIG.
As shown in (c), a pair of slope plates 46 formed by rolling a rolled steel plate in a U-shaped cross section is used as a frame-shaped reinforcing member 4 made of a square pipe.
7, the L-shaped locking pieces 48 are bent downward at one end of each slope plate 46.

Then, with the first caster member 5 removed from the carrier vibration isolation pallet 1, the locking piece 48 is inserted into the gap 44 formed by the connecting member 43 and the end surface of the mounting frame 31. The slope member 45 is detachably connected with the same inclination angle as the upper surface of the mounting frame 31.

When the vibration isolating pallet 1 for transportation is tilted, it is carried out as follows. First, as shown in FIG. 7A, the lifter member 50 is inserted into the lower surface of the base frame 2 on one end side in the predetermined direction, with the bending direction of the bending portion 53 facing upward.
Next, the lifter member 50 is pulled in the direction shown by the arrow in FIG. 7A, and the locking piece 55 is engaged with the engaging member 22. Then, as shown in FIG. 7B, the lifter member 50 is rotated about this engaging point as a fulcrum so as to be substantially vertical.

As a result, the one end side of the base frame 2 in the predetermined direction can be lifted, so that the first caster member 5 provided at the one end side of the base frame 2 can be moved up to the caster 54 of the lifter member 50 as shown in FIG. Can be increased by the dimension indicated by L.

By raising the first caster member 5, the first caster member 5 can be removed from the locking portion 15 of the holding member 16 provided on the lower surface of the base frame 2.

When the first caster member 5 is removed, the lifter member 50 is laid down as shown in FIG. 7C and slid in the direction shown by the arrow in FIG.
As shown in (d), the lifter member 50 is removed. As a result, the carrier-isolated pallet 1 can be tilted at a predetermined angle with one end side lowered in the predetermined direction.

Next, as shown in FIG. 7E, the slope member 45 is attached to the lower end of the inclined mounting frame 31 in the inclination direction.
If the slope member 45 is connected to the mounting frame 3
It can be tilted at about the same angle as 1.

According to the carrier vibration isolating pallet 1 thus constructed, the mounting frame 31 is supported by the base frame 2 by the air spring 25. Therefore, when the transported object W is placed and fixed on the mounting frame 31 and transported,
Vibration during transportation is absorbed by the air spring 25, and it becomes difficult for the vibration during transportation to be transmitted to the transported article W on the mounting frame 31. Therefore, even if the transported article W is a precision instrument, it is damaged by vibration or the like. It becomes possible to carry without carrying out.

A loading frame 31 on which the article W is loaded
Are elastically supported by the air spring 25 on the base frame 2. The air spring 25 can adjust the air pressure. That is, since the spring constant can be set according to the load of the conveyed article W, the spring constant of the air spring 25 can be set according to the weight of the conveyed article W.

Therefore, if the spring constant of the air spring 25 is adjusted according to the weight of the conveyed product W, even if the weight of the conveyed product W changes, the conveyed product W can be conveyed in a state in which vibration is difficult to be transmitted. .

Of the pair of first and second caster members 5 and 6 provided on the base frame 2, the first caster member 5 can be detached from the base frame 2 and can be mounted in an inclined state in the detached state. As shown in FIG. 7E, the slope member 45 can be detachably connected to the connecting member 43 provided at the lower end of the mounting frame 31 in the inclined direction.

Therefore, in order to lower the conveyed article W from the placing frame 31, if the fixed state of the conveyed article W placed on the placing frame 31 is released, the conveyed article W is moved to the slope member 45. It suffices if the vehicle travels along the slope plate 46. Therefore, it is possible to easily and safely unload the conveyed article W from the mounting frame 31.

When the transported article W is unloaded from the mounting frame 31, the transport vibration isolation pallet 1 is tilted, and the slope member 45 is connected to the lower end side of the tilt direction. Therefore, since the angle of the slope member 45 can be made gentle, the unloading of the conveyed article W can be performed easily and safely also by that. Furthermore, since the slope of the slope member 45 can be made gentler, the distance of the slope can be shortened. Therefore, it is not necessary to secure a large space necessary for unloading, and the unloading work can be easily performed even in a small room. Is possible.

When the conveyed article W is unloaded from the mounting frame 31, the pair of first caster members 5 must be removed from the base frame 2 in order to tilt the mounting frame 31.

The first caster member 5 is attached to the base frame 2
In order to remove it from FIG. 7B, one end side of the carrier-isolated pallet 1 on which the carrier W is placed is lifted by the lifter member 50.
Can be lifted as shown in. That is, the engaging piece 55 provided on the lifter member 50 is engaged with the engaging member 22 provided on the base frame 2, and the engaging portion is used as a fulcrum as shown in FIG. When is rotated in the upright direction, one end side of the vibration isolating pallet 1 for transportation can be easily lifted with a comparatively light force to remove the first caster member 5 by the lever principle.

Therefore, the above-mentioned carrier isolation pallet 1 is tilted and the slope member 45 is attached, and then the carrier W is conveyed.
It is possible to easily perform a series of work of lowering.

Mounting frame 31 of the vibration isolation pallet 1 for transportation
When the article W is unloaded from the mounting frame 31, the mounting frame 31 is displaced in the ascending direction by the restoring force of the air spring 25. At that time, the displacement amount of the mounting frame 31 is limited by the regulating member 38.

Therefore, the article W is transferred from the mounting frame 31.
Since the mounting frame 31 is not largely displaced by the restoring force of the air spring 25 when unloading, the safety at the time of unloading can also be improved by that.

When the article W is placed on the placement frame 31 of the carrier isolation pallet 1 shown in FIGS.
The procedure may be performed in the reverse order of the unloading described with reference to (e).

[0056]

As described above, according to the present invention, the mounting frame is provided on the base frame via the air spring whose air pressure can be adjusted, and the transported object is mounted on the mounting frame. .

Therefore, the vibration generated at the time of transportation is absorbed by the air spring and is difficult to be transmitted to the transported object on the mounting frame, so that the transported object can be transported without being damaged by the vibration or the like.

[Brief description of drawings]

1A is a plan view of a carrying pallet according to an embodiment of the present invention, and FIG. 1B is a side view.

2A to 2C are views showing a base frame.

3A to 3C are views showing a mounting frame.

FIG. 4 is a side view in which a first caster member is detachably attached to a holding member on a lower surface of a base frame.

5A is a front view of a lifter member, and FIG. 5B is a side view.

6A to 6C are views of a slope member.

7 (a) to 7 (e) are explanatory views sequentially showing the operation of lowering the conveyed object from the mounting frame.

[Explanation of symbols]

2 ... Base frame 5 ... First caster member 6 ... Second caster member 22 ... Engaging member 25 ... Air spring 31 ... Mounting frame 38 ... Regulating member 43 ... Connection member 45 ... Slope member 50 ... Lifter member

Claims (6)

[Claims] 1. A carrier base isolation pallet for carrying a carrier, comprising: a rectangular base frame; a plurality of air springs having adjustable air pressures provided at a plurality of positions on an upper surface of the base frame; A carrier vibration isolation pallet, comprising: a mounting frame which is elastically supported by the air spring and on which an object is mounted. 2. A caster member is provided at each of the four corners of the lower surface of the base frame, and at least a pair of caster members of the four caster members located on one end side in a predetermined direction is detachably provided on the base frame. The vibration-isolating pallet for transport according to claim 1, wherein 3. A caster member removably provided on the base frame, a pedestal, a leg member having one end rotatably attached to the pedestal, and a rotation axis on the other end of the leg member with respect to the pedestal. A wheel that is rotatably provided substantially orthogonal to the rotation axis of the member, and a holding member that detachably engages and holds the pedestal is provided on the lower surface of the base frame. The vibration-isolating pallet for transportation according to claim 2. 4. The inclination of the mounting frame is at the lower end of the inclination direction of the mounting frame in a state where the pair of caster members located on one end side in the predetermined direction of the base frame are removed and the base frame is inclined. 3. A connecting member for connecting one end of a slope member forming an inclined surface having substantially the same angle as the surface is provided.
Vibration isolation pallet for transportation as described. 5. When removing a caster member from the base frame by lifting one end side of the vibration isolation pallet using a lifter member as a lever in a state in which a transported object is placed on the mounting frame, 3. An engaging member, which is rotatably engaged with the lifter member and serves as a fulcrum of rotation of the lifter member, is provided on one end side of the base frame in the predetermined direction. Vibration isolation pallet for transportation. 6. The mounting frame according to claim 1, wherein the amount of displacement in the ascending direction due to the restoring force of the air spring is limited by the regulating member when the transported object is unloaded from the mounting frame. The vibration isolation pallet for transportation according to Item 1.