JPH09301050A - Vibration-absorbing deck device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive vibration-absorbing deck device exerting its vibration-absorbing function only when necessary. SOLUTION: A vibration-absorbing deck device comprises a plurality of grooves 2 in a deck floor 1, expandable/shrinkable members 3 held in the grooves, nonskid members covering over the expandable/shrinkable members, and pipe lines L1 and L2. A three-way valve 6 is interposed between the pipe lines, which normally causes the expandable/shrinkable members 3 to communicate with the outside air and when a manual switch 7 is operated causes the expandable/shrinkable members 3 to communicate with a pressure gas source 5. A pressure sensor 8 is provided for the three-way valve 6. When the sensor 8 detects the pressure to the expandable/shrinkable members 3 of a preset value or above, the three-way valve 6 interrupts the communication of the expandable/shrinkable members 3 with the pressure gas source 5, and when another sensor detects the projection level of the nonskid members 4 from the deck floor 1 of a preset level or above, the three-way valve 6 also interrupts the communication of the expandable/shrinkable members 3 with the pressure gas source 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a luggage carrier that absorbs vibration of luggage on the luggage carrier.

[0002]

2. Description of the Related Art As shown in FIG.
A metal fitting 21 having a plurality of small windows 21a parallel to the floor and having a constant pitch D is provided on the left and right side surfaces from the front end to the rear end of 0, and both ends 22a of the crossbar 22 are provided in the left and right small windows 21a. There is known a device for penetrating the bag to restrain the movement of the luggage in the front-rear direction (Japanese Utility Model Laid-Open No. 4-68645).

However, with this device, the load is not restrained against vertical vibrations and the load is damaged.
For this reason, a freight vehicle equipped with an air suspension has been conventionally used for transporting precision equipment and electronic components that are sensitive to vibration.

[0004]

However, in the conventional freight vehicle equipped with the above-mentioned air suspension, the air suspension itself is expensive, and the load is not always a bag that does not want to vibrate at all times. On a certain road surface, there is a problem that a so-called rolling phenomenon in which the vehicle body is swayed laterally is likely to occur. In view of such problems of the conventional technology, an object of the present invention is to provide an inexpensive vibration absorbing load carrier device that exhibits a vibration absorbing function only when necessary.

[0005]

SUMMARY OF THE INVENTION A vibration absorbing load carrier device according to the present invention comprises a plurality of grooves formed on a floor surface of a load carrier and an expansion / compression member housed in the grooves and having airtightness and capable of expanding and contracting. A non-slip member that covers the upper portion of the expansion / contraction member, and a piping system that connects the expansion / contraction member to the pressurized gas source and the outside air.

A three-way valve is interposed in the piping system, the three-way valve normally communicates the expansion / contraction member with the outside air, and when the manual switch is operated, the expansion / contraction member is connected. It is configured to communicate with a pressure gas source,
Further, the three-way valve is provided with a pressure sensor, and when the pressure sensor detects that the pressure on the side of the expansion / contraction member of the three-way valve is equal to or higher than a predetermined value, the expansion / contraction member and the pressure gas source. With a sensor for blocking the communication with and also for measuring the amount of protrusion of the anti-slip member from the floor surface of the cargo bed,
It is provided with a mechanism for cutting off the communication between the expansion / contraction member and the pressurized gas source when it is confirmed that the amount of protrusion of the anti-slip member from the floor surface of the cargo bed is equal to or more than a predetermined value.

Further, the above piping system has a supply piping system for communicating the pressure gas source with the expansion / contraction member and a discharge piping system for communicating the expansion / contraction member with the atmosphere side. Each system can be equipped with an on-off valve.

[0008]

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

FIG. 1 is an overall configuration diagram of a vibration absorbing carrier device using a three-way valve, FIG. 2 is a diagram showing a state where the vibration absorbing function is activated in the AA cross section of FIG. 1, and FIG. FIG. 2 is a view of a state in which the vibration absorbing function does not operate in the AA cross section of FIG. 1.

Further, FIG. 4 is a diagram showing a control flow of the vibration absorbing function, and FIG. 5 is a pneumatic circuit diagram in the case where an on-off valve is used at two places as another embodiment.

First, the structure will be described with reference to FIGS.

In FIG. 1 to FIG. 3, two floor grooves 2 having a U-shaped cross section and open upward are formed from the front end to the rear end on the floor surface 1 of the cargo bed. A non-slip member 4 having a U-shaped cross section, which is slightly narrower than the width, is housed so that the groove 2 is convexly convex. The top surface of the anti-slip member 4 is made of, for example, hard rubber, so that the luggage does not easily slip when it comes into contact with the luggage. The space formed by the groove 2 and the anti-slip member 4 is airtight and accommodates, for example, a boot-shaped expansion / contraction member 3 made of resin, which is expandable / contractible by supplying / discharging pressurized gas. ing.

The expansion / contraction member 3 is connected to a pressure gas source 5 by supply piping systems L1 and L2 having a three-way valve 6 interposed therebetween, and one port of the three-way valve 6 communicates with the outside air. The three-way valve 6 is configured such that the expansion / contraction member 3 communicates with the pressure gas source 5 when the manual switch 7 is turned on. When pressure gas is supplied to the expansion / contraction member 3, the expansion / contraction member 3 expands, and the anti-slip member 4 is projected above the cargo bed floor surface 1.

Further, the supply piping system L on the expansion / contraction member 3 side.
2, a pressure sensor 8 is interposed, and the pressure sensor 8
The control unit 12 determines whether the pressure is larger than the predetermined value based on the pressure information of 1., and when the pressure becomes larger than the predetermined value, the three-way valve 6 shuts off the communication between the expansion / contraction member 3 and the pressure gas source 5. It is composed.

Further, a part of the floor is provided with a protrusion amount measuring sensor 9 for measuring the amount of protrusion of the anti-slip member 4 from the floor surface 1 of the cargo bed, and the anti-slip member 4 is loaded on the floor surface 1 of the cargo bed.
The three-way valve 6 blocks the communication between the expansion / contraction member 3 and the pressure gas source 5 when the amount of protrusion from the predetermined amount exceeds a predetermined value.

Reference numerals C1, C2 and C3 in FIG. 1 are signal lines.

Therefore, during transportation of equipment that dislikes vibration, such as precision equipment and electronic equipment, pressure gas is supplied to the expansion / contraction member 3 so that the anti-slip member 4 is projected from the floor surface 1 of the cargo bed (equipment that dislikes vibration). ), It is possible to greatly reduce the influence of vibration on the luggage due to the vibration absorbing function of the expansion / contraction member 3 that supports the anti-slip member 4.

Next, a method for controlling the supply / shutoff and discharge of air to the expansion / contraction member 3 (control of the vibration absorbing function) will be described with reference to FIGS. 4 and 1 to 3.

After the start, it is judged whether or not the three-way valve control switch 7 is operated (step S1, S in the figure).
Write 1. The same applies hereinafter), when it is desired to operate during transportation of equipment that dislikes vibration (YES in step S1), the three-way valve 6 is operated so that L1 and L2 of the supply pipe communicate with each other, and the expansion / contraction member from the pressure gas source 5 is expanded. The pressure gas is supplied to 3 (step S2). When not operating (NO in step S1), the three-way valve 6 is operated so that L2 of the supply pipe communicates with the atmosphere opening port E of the three-way valve 6, and the air in the expansion / contraction member 3 is discharged. Control ends. Further, in the supply piping system L2, the pressure sensor 8 detects the pressure on the side of the expansion / contraction member 3, and the control unit 12 judges whether or not the air pressure is a predetermined value or more based on this detection signal (step S3). ). If the air pressure has not reached the predetermined value (NO in step S3), the process proceeds to step S4. Further, the air pressure is equal to or higher than a predetermined value (step S
If YES in 3), the process proceeds to step S5.

In step S4, the protrusion amount detection sensor (for example, the gap sensor) 9 detects the protrusion amount of the anti-slip member 4 from the bed floor surface 1 (or the protrusion amount may be visually determined). Based on this detection signal (or visual inspection), the control unit 12 determines whether or not the protrusion amount is equal to or larger than a predetermined value. If the amount of protrusion is equal to or greater than the predetermined value (YES in step S4), the process proceeds to step S5, and the control unit 12 controls the three-way valve to stop the air supply (or manually), and ends the process. If the amount of protrusion does not reach the predetermined value (N in step S4
O) Control returns to step S2.

Next, as another embodiment, an example in which an on-off valve is used at two locations in addition to the above-described three-way valve will be described by using FIG. 5 and comparing with FIG. Note that the description of the portions having the same functions as those in FIG. 1 will be omitted. An on-off valve 10 is interposed between the supply pipe systems L1 and L2 instead of the three-way valve, and a discharge pipe system L3 is newly provided at the rear end of the expansion / contraction member 3, and the discharge pipe system L3. An on-off valve 11a is connected to the other end of the. Instead of connecting the discharge piping system L3 and the opening / closing valve 11a, the discharging piping system L4 and the opening / closing valve 11b may be connected in the middle of the supply piping system L2. However, the discharge piping system L3 and the opening / closing valve 11a and the discharge piping system L4 and the opening / closing valve 11b are not used at the same time.

When the vibration absorbing function is to be activated, the on-off valve 10 is opened and the on-off valve 11a (or the on-off valve 11
When b) is closed and the vibration absorbing function is not operated, the on-off valve 10 is closed and the on-off valve 11a (or the on-off valve 11b) is closed.
You can open it.

[0023]

According to the present invention having the above-described structure, a vibration absorbing function is exerted only when necessary without using an expensive air suspension for the chassis, that is, a device which is sensitive to vibration, such as a precision device or When the electronic device or the like is transported, the expansion / contraction member 3 is supplied with a pressure gas, and the anti-slip member 4 is projected from the floor surface 1 of the loading platform to support the load (device that dislikes vibration) to support the anti-slip member 4. By the vibration absorbing function of the expanding / contracting member 3 that can be provided, it is possible to provide a low-priced luggage carrier device that can greatly reduce the influence of vibration on luggage.
There is no need to worry about rolling when using the air suspension.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vibration absorbing load carrier device embodying the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 when the vibration absorbing function is activated.

3 is a cross-sectional view taken along the line AA of FIG. 1 when the vibration absorbing function does not work.

FIG. 4 is a control flow of a vibration absorbing function according to the present invention.

FIG. 5 is a pneumatic circuit diagram according to another embodiment of the present invention.

FIG. 6 is a conventional luggage restraint device for a luggage carrier.

[Explanation of Codes] 1 ... Floor of floor 2 ... Groove 3 ... Expansion / compression member 4 ... Anti-slip member 5 ... Pressure gas source 6 ... Three-way valve 7 ... Manual switch 8 ... Pressure sensor 9 ... Protrusion amount detection sensor 10, 11a, 11b ... Open / close valve 12 ... Control unit L1, L2 ... Supply piping system L3, L4 ... Discharge piping system C1, C2, C3 ... Signal line

Claims (6)

[Claims] 1. A plurality of grooves formed on a floor surface of a cargo bed, an expansion / compression member that is housed in the grooves and has airtightness and is expandable / contractible, and a slip stopper that covers an upper portion of the expansion / contraction member. A luggage carrier device comprising: a member; and a piping system that connects the expansion / contraction member to a pressure gas source and the outside air. 2. A three-way valve is interposed in the piping system, the three-way valve normally connects the expansion / contraction member and the outside air, and the expansion / contraction member is connected when the manual switch is operated. A device configured to communicate with a source of pressurized gas.
Carrier equipment. 3. A pressure sensor is provided in the three-way valve,
A mechanism is provided for interrupting communication between the expansion / contraction member and the pressure gas source when the pressure sensor detects that the pressure on the expansion / contraction member side of the three-way valve has reached a predetermined value or more. 2 luggage carrier device. 4. The luggage carrier device according to claim 2, further comprising a mechanism for cutting off the communication between the expansion / contraction member and the pressure gas source when the amount of protrusion of the anti-slip member from the floor surface of the luggage carrier exceeds a predetermined value. . 5. The luggage carrier device according to claim 4, further comprising a sensor for measuring the amount of protrusion of the anti-slip member from the floor surface of the luggage carrier. 6. The supply piping system and the discharge piping, wherein the piping system has a supply piping system that connects the pressure gas source and the expansion / contraction member to each other and a discharge piping system that connects the expansion / contraction member to the atmosphere side. The luggage carrier device according to claim 1, wherein each system is provided with an on-off valve.