JPH0868207A - Safety device for interior material conveying mounting vehicle - Google Patents

Abstract

PURPOSE: To prevent the drop of an interior material in such a way to automatically hold working oil, fed to a cylinder, at a pressure necessary to grasping and to announce a risk by alarming when a pressure necessary to grasping is not generated. CONSTITUTION: A solenoid valve 29 to switch the feed and discharge of working oil to and from a cylinder 26 and a pressure switch PSW to detect the pressure of working oil fed to the cylinder 26 are disposed to a hydraulic circuit 27 of the cylinder 26 to reduce a distance between a pair of grasping members 25 and 25 to grasp a building panel 21. When a pressure of working oil detected by the pressure switch PSW is reduced to a value lower than a given value, the solenoid valve 29 is switched so that working oil is fed to the cylinder 26. A logic circuit 31 is provided to alarm when a pressure of the working oil to the cylinder 26 is not increased to a value higher than a given value even when a specified time starting from switching of the solenoid valve 29 elapses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an interior material carrying and mounting vehicle for transporting and installing interior materials such as building panels to a predetermined place.

[0002]

2. Description of the Related Art For example, a vehicle for mounting and carrying interior materials disclosed in Japanese Patent Laid-Open No. 6-129087 discloses that a pair of gripping members provided at the tip of an arm provided on a vehicle body is expanded and contracted by a cylinder to hold both gripping members. The inner material is gripped in between, and the inner material is transported to a predetermined place and installed.When gripping the inner material between both gripping members, the pressure of the hydraulic oil supplied to the cylinder is necessary for gripping. When the pressure drops below a certain pressure, the interior material being gripped falls, so a safety device such as that shown in FIG.
, A pressure switch 4 is provided in the hydraulic circuit 3 of the cylinder 2 that reduces the distance between the pair of gripping members 1, 1.
When the pressure of the hydraulic oil in the cylinder 2 is equal to or higher than the pressure required for gripping, the display lamp 5 is turned on to let the operator recognize that the interior material is securely gripped.

When the pressure of the hydraulic oil supplied to the cylinder falls below a predetermined value, which is slightly higher than the lower pressure limit required for gripping, the indicator lamp 5 goes out and the operator who notices this turns off the manual switching valve. 6 is switched to restore the pressure of the hydraulic oil to the cylinder 2.

[0004]

However, in the above-mentioned configuration, when the user does not notice that the indicator lamp is off, the pressure of the hydraulic oil supplied to the cylinder falls below the pressure required for gripping. As a result, the interior material will fall, so the operator had to frequently check the lighting of the indicator lamp.

In view of this, the present invention automatically holds the fluid pressure for gripping or adsorbing the interior material at the pressure required for gripping or adsorbing the interior material to prevent the interior material from falling, and in the unlikely event that the interior material is gripped or adsorbed. An object of the present invention is to provide a safety device for a vehicle mounted with an interior material, which issues an alarm to notify a danger when a necessary pressure cannot be obtained.

[0006]

In order to achieve the above-mentioned object, the present invention is, in the first invention, a hydraulic circuit of a cylinder for expanding and contracting a distance between a pair of gripping members provided at the tip of an arm,
When the pressure of the hydraulic oil supplied to the cylinder is equal to or higher than the pressure required for gripping, in a safety device of a vehicle for mounting and mounting interior materials equipped with a pressure switch that lights an indicator lamp, the hydraulic circuit of the cylinder is connected to the cylinder. And a solenoid valve for switching the supply and discharge of the hydraulic oil, and when the pressure of the hydraulic oil is below a set value for turning off the pressure switch, the solenoid valve is switched to supply the hydraulic oil to the cylinder, A logical circuit for issuing an alarm when the pressure of the hydraulic oil does not exceed the set value for turning on the pressure switch even after a lapse of a certain time after switching the valve. In the second invention, plate glass or the like is provided. In a vehicle equipped with a negative pressure adsorption device for adsorbing the flat plate-shaped interior material at the tip of the arm, the vacuum circuit of the negative pressure adsorption device is connected to the vacuum circuit. A pressure switch is installed to detect the pressure of the vacuum circuit. If the pressure in the vacuum circuit exceeds the set value for turning off the pressure switch, rotate the vacuum pump and rotate the vacuum pump to keep the vacuum circuit running for a certain period of time. It is characterized in that a control circuit is provided for issuing an alarm when the pressure does not fall below a set value for turning on the pressure switch.

[0007]

[Operation] According to the above configuration, in the first aspect of the invention, when the pressure of the hydraulic oil in the cylinder in the gripped state becomes equal to or lower than the set value for turning off the pressure switch, the logic circuit switches the solenoid valve to switch the cylinder valve. Supply hydraulic oil to the cylinder to automatically increase the pressure of the hydraulic oil in the cylinder and turn on the pressure switch.
To prevent the interior material from falling, and in the unlikely event that the hydraulic oil pressure falls below the set value for turning off the pressure switch, the logic circuit switches the solenoid valve to supply hydraulic oil to the cylinder. However, if the pressure of the hydraulic fluid does not exceed the set value for turning on the pressure switch after a certain period of time, an alarm is issued to indicate the danger.

According to the second aspect of the invention, when the pressure in the vacuum circuit of the negative pressure adsorption device exceeds a set value for turning off the pressure switch, the vacuum pump is rotated to automatically increase the negative pressure. , Keep the pressure switch below the set value to prevent the interior material from falling, and if the pressure in the vacuum circuit exceeds the set value to turn off the pressure switch, rotate the vacuum pump and a certain time elapses. Even if the pressure in the vacuum circuit does not fall below the set value for turning on the pressure switch, an alarm is issued to notify the danger.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings.

FIGS. 1 to 4 show a first embodiment of the present invention. An interior material transporting and mounting vehicle 10 has a pair of front wheels 12 which are horizontally rotatable on both sides of a front portion of a vehicle body 11. A pair of rear wheels 14 capable of horizontally rotating a pair of rear wheels 14 via the support arm 13 and on both sides of the rear portion of the vehicle body 11.
5, an arm 16 is provided at the center of the front part of the vehicle body 11, and a storage part 17 for storing a hydraulic drive unit, a battery, etc. is provided at the rear part.

The arm 16 is composed of a lower arm 16a and an upper arm 16b. The lower arm 16a is provided so as to be rotatable in the horizontal direction, and a cylinder 18 is provided.
The vertical movement of the upper arm 1
The operation of the cylinder 19 causes the 6b to rotate up and down in the vertical direction.

A wrist bracket 20 which rotates in the vertical direction is provided at the tip of the upper arm 16b, and the wrist bracket 20 has a panel attachment 22 for holding an interior material such as a building panel 21 attached to the tip thereof.
The attachment 22 is configured to be capable of rotating in the horizontal direction and capable of rotating.

The interior material transporting and mounting vehicle 10 is capable of vertical traveling, lateral traveling, and spin-turning by operating an operating lever and various switches of the remote control box 23 by an operator, and grips the building panel 21 and the like. At the time of transportation work, the support arms 13 and 15 are expanded to the side of the vehicle body to improve safety, and when the main body is transferred, the support arms 13 and 15 are reduced to make the vehicle width compact, so that it can be installed in a construction elevator or the like. It can be easily stored.

Various safety devices are mounted on the vehicle 10 for transporting and mounting interior materials constructed as described above. As these safety devices, a fall prevention arm 24 extending to the tip of the support arm 13 and a work range for gripping weight are set to prevent falling from the front during gripping / transporting work, and this is exceeded. In this case, there are sensors that automatically stop the vehicle and sensors that detect obstacles in front of the vehicle because the vehicle travels by remote control.

The panel attachment 22 is for holding or opening the building panel 21 by reducing or enlarging the space between the pair of gripping members 25, 25 with a cylinder 26. The cylinder 26 is provided with a hydraulic circuit 27. ing.

The hydraulic circuit 27 is composed of a pump 28 for supplying hydraulic oil to the cylinder 26 and a solenoid valve 29 for switching the supply and discharge of hydraulic oil from the pump 28. The line 30 to the reduction side is provided with a pressure switch PSW for detecting the pressure of the hydraulic oil in the line 30, and the pressure switch PSW is connected to the logic circuit 31.

The logic circuit 31 operates the solenoid valve 29 based on a command from the remote control box 23, switches the supply and discharge of the hydraulic oil from the pump 28 to the cylinder 26, and expands and contracts the cylinder 26 to hold the gripping members 25, 25. The building panel 21 is gripped / opened by reducing or expanding the space between.

When the building panel 21 is held, when the cylinder reduction switch SW1 of the remote control box 23 is turned on, the logic circuit 31 causes the solenoid valve 29 to operate.
Sol1 is turned on to switch the solenoid valve 29, and hydraulic oil is supplied from the pump 28 to the reduction side of the cylinder 26 via the line 30.

The pressure switch PSW is set to be turned off when the pressure of the hydraulic oil in the line 30 is slightly above the lower pressure limit required for gripping, and is turned on at a pressure slightly higher than this.

Therefore, when the pressure of the hydraulic oil in the line 30 for reducing the cylinder 26 becomes equal to or higher than the ON set value of the pressure switch PSW, the pressure switch PSW is turned on, whereby the logic circuit 31 turns on the sol1 of the solenoid valve 29. It is turned off, the solenoid valve 29 is switched to the neutral state, the pump 28 is stopped, the pressure of the hydraulic oil in the line 30 is maintained at the pressure necessary for gripping, the display lamp PL is turned on, and the building panel 21 is securely held. The operator is made to recognize that it is gripped.

When the pressure of the hydraulic oil in the line 30 is lowered to the OFF set value of the pressure switch PSW or less while holding the building panel 21, the pressure switch PSW is OF
F, which causes the logic circuit 31 to rotate the pump 28 and turn on sol1 of the solenoid valve 29,
The solenoid valve 29 is switched, and the pump 28 connects to the line 30.
The hydraulic oil is supplied to the reduction side of the cylinder 26 via the, and the pressure of the hydraulic oil in the line 30 is automatically increased.

When the pressure of the hydraulic oil in the line 30 rises and exceeds the ON set value of the pressure switch PSW, the pressure switch PSW is turned on again, and the logic circuit 31 turns off the sol1 of the solenoid valve 29 and the solenoid valve Two
9 is switched to the neutral state, the pump 28 is stopped, and the line 3
The pressure of the hydraulic oil of 0 is maintained at the pressure necessary for gripping to prevent the building panel 21 from falling.

Then, in the unlikely event of a failure of the hydraulic system or the like, the pressure of the hydraulic oil in the line 30 drops and the pressure switch PSW
Turns off and the logic circuit 31 causes the sol of the solenoid valve 29 to
Even when 1 is turned on, the solenoid valve 29 is switched, and hydraulic oil is supplied from the pump 28 to the reduction side of the cylinder 26 via the line 30, the pressure is not reached after a certain period of time measured by the timer T incorporated in the logic circuit 31. When the switch PSW is not turned on, the logic circuit 31 sounds the buzzer BZ and issues an alarm to notify the danger.

In order to prevent the building panel 21 from dropping due to a malfunction when the held building panel 21 is opened, the cylinder extension switch SW2 of the remote control box 23 is turned on in this embodiment. After that, when the cylinder extension switch provided on the vehicle body 11 is turned on, the logic circuit 31 turns on sol2 of the solenoid valve 29.
N, the solenoid valve 29 is switched, and the gripping members 25, 2
The space of 5 is enlarged to open the building panel 21.

Therefore, the worker does not have to pay attention to the fall of the building panel 21 in the normal work, and can concentrate on the work of mounting and installing the building panel 21, and in the case of an emergency, carrying and installing the interior material. By moving the vehicle 10 to a safe place or the like, it is possible to avoid the risk of the building panel 21 falling.

FIGS. 5 to 7 show a second embodiment of the present invention in which a negative pressure suction device 32 is attached to the tip of the wrist bracket 20, and the negative pressure suction device 32 sucks the plate glass 33 by six pieces. Of the vacuum pump 35, the vacuum circuit 36 from the vacuum pump 35 is branched into two systems of vacuum circuits 36a and 36b, and three vacuum pads 3 are provided in each of the vacuum circuits 36a and 36b.
4 is connected so that even if one vacuum circuit is disabled, the other vacuum circuit can hold the plate glass 33.

The vacuum circuit 36a includes a solenoid valve 37a and a pressure switch 38a, and the vacuum circuit 36b includes a solenoid valve 37b and a pressure switch 38a.
b and solenoid valves 37a and 37b, respectively.
The plate glass 33 is sucked and released by switching.

Further, the negative pressure adsorption device 32 is provided with a control circuit 38 for rotating / stopping the vacuum pump 35 and switching the solenoid valves 37a and 37b by operating the remote control box 23.

The negative pressure adsorption device 32 configured as described above
Is a glass plate 3 for carrying and attaching the glass plate 33.
When 6 vacuum pads 34 are pressed against 3 and the suction switch of the remote control box 23 is turned on,
The control circuit 38 rotates the vacuum pump 35 and switches the solenoid valves 37a and 37b so that the vacuum pads 34 and 35 are communicated with each other to make the inside of the vacuum circuits 36a and 36b a negative pressure and to generate the six vacuum pads 34. The plate glass 33 is adsorbed.

In the present embodiment, the pressure switches 38a and 38b are -450 mm inside the vacuum circuits 36a and 36b.
ON at Hg to -760 mmHg, 0 to -300 mmH
It is set to be turned off by g, and the inside of the vacuum circuits 36a and 36b becomes a negative pressure so that both pressure switches 38
When a and 38b are turned on, the control circuit 38 turns on the confirmation lamp of the remote control box 23, stops the rotation of the vacuum pump 35, maintains the negative pressure state of the vacuum circuits 36a and 36b, and maintains the six vacuums. The state where the plate glass 33 is adsorbed by the pad 34 is maintained.

When one of the pressure switches 38a and 38b is turned off in the state where the plate glass 33 is adsorbed,
The control circuit 38 rotates the vacuum pump 35, and stops the rotation of the vacuum pump 35 when the pressure switch, which has been off for a certain period of time, is turned on.

In the unlikely event that the pressure switch, which has been off for a certain period of time, does not turn on, the control circuit 38
Switch the solenoid valve of the vacuum circuit on the pressure switch side that issues an intermittent alarm and turns it off to the atmosphere open side, and connect the remaining vacuum circuits to the three vacuum pads 3
At 4, the plate glass 33 is kept adsorbed.

As a result, it is possible to suspend the transportation and mounting work of the plate glass 33, place the plate glass 33 in a safe place, and inspect and repair the vacuum circuit in which the abnormality has occurred.

When the pressure switch of the remaining vacuum circuit adsorbing the plate glass 33 is turned off, the vacuum pump 35 is rotated and after a certain time has passed, OF
When the F pressure switch is turned on, the rotation of the vacuum pump 35 is stopped.

In the unlikely event that the pressure switch of the remaining vacuum circuit does not turn on even after a certain period of time, the control circuit 38 issues a continuous alarm to notify the danger, and at the same time, one of the vacuum circuits which was cut off earlier. Is returned to make the inside of the vacuum circuit a negative pressure to adsorb the plate glass 33,
The fall of the plate glass 33 is prevented.

When the plate glass 33 is opened, when the open switch of the remote control box 23 is pressed, the vacuum pump 35 stops rotating. Therefore, when the valve operation switch of the remote control box 23 is pressed in this state, The solenoid valves 37a and 37b are switched to the atmosphere open side, the vacuum circuits 36a and 36b return to normal pressure, and the six vacuum pads 34 separate from the plate glass 33.

Therefore, the operator does not need to pay attention to the fall of the plate glass 33 in the normal work, and the plate glass 33 is not required.
In addition to being able to concentrate on the transportation and mounting work, when an emergency occurs, the interior material transportation and mounting vehicle 10 can be moved to a safe place or the like to avoid the risk of falling the glass sheet 33.

[0038]

As described above, according to the first aspect of the present invention, in the safety device for a vehicle for mounting and mounting interior materials, the hydraulic circuit of the cylinder for expanding and contracting the distance between the pair of gripping members provided at the tip of the arm is provided. A solenoid valve for switching the supply and discharge of hydraulic oil to and from the cylinder; and, when the pressure of the hydraulic oil is below a set value for turning off the pressure switch, switching the solenoid valve to supply hydraulic oil to the cylinder, A logic circuit is provided for issuing an alarm if the pressure of the hydraulic fluid does not exceed the set value for turning on the pressure switch even after a certain period of time has elapsed since the solenoid valve was switched. When the pressure falls below the set value for turning off the pressure switch, the logic circuit switches the solenoid valve to supply hydraulic oil to the cylinder and automatically raise the hydraulic oil pressure in the cylinder. Hold the pressure switch above the set value to prevent the interior material from falling, and should the pressure of the hydraulic oil fall below the set value to turn off the pressure switch, the logic circuit switches the solenoid valve to switch the cylinder. If the pressure required for gripping does not exceed the set value for turning on the pressure switch after a certain period of time, even if the hydraulic oil is supplied to, a warning is issued to notify the danger.

According to the second aspect of the invention, the vacuum circuit of the negative pressure adsorbing device for adsorbing the flat interior material such as plate glass is provided with a pressure switch for detecting the negative pressure state of the vacuum circuit. If the pressure exceeds the set value to turn off, the vacuum pump is rotated, and if the vacuum circuit pressure does not fall below the set value to turn on the pressure switch even after a certain time has passed after rotating the vacuum pump, an alarm is issued. Since the control circuit has been installed, when the pressure in the vacuum circuit of the negative pressure adsorption device exceeds the set value for turning off the pressure switch, the vacuum pump is rotated to raise the negative pressure automatically and the pressure switch ON
To prevent the interior material from falling, and even if the vacuum circuit pressure exceeds the set value for turning off the pressure switch and the vacuum pump is rotated for a certain period of time, the vacuum If the circuit pressure does not fall below the set value for turning on the pressure switch, an alarm will be issued to alert you to the danger.

Therefore, the worker does not have to pay attention to the fall of the interior material during the normal work, and can concentrate on the work of attaching and installing the interior material, and in the event of an emergency, the vehicle for attaching and installing the interior material can be safely operated. By moving to a place,
It is possible to avoid the danger of falling interior materials.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram of a panel attachment.

FIG. 2 is a perspective view of a vehicle for mounting and mounting interior materials.

FIG. 3 is an electric circuit diagram of the panel attachment.

FIG. 4 is a flowchart showing the operation of the safety device.

FIG. 5 is a side view of the negative pressure adsorption device.

FIG. 6 is a vacuum circuit diagram of the negative pressure adsorption device.

FIG. 7 is a flowchart of a control circuit of the negative pressure adsorption device.

FIG. 8 is a hydraulic circuit diagram of a conventional material gripping device.

[Explanation of symbols]

10 ... Vehicle for mounting and transporting interior materials, 16 ... Arm, 21 ... Building panel, 22 ... Panel attachment, 23 ... Remote control box, 25 ... Gripping member, 26 ... Cylinder, 27 ... Hydraulic circuit, 29 ... Solenoid valve, 31 ... Logic Circuit, PSW ... Pressure switch, PL ... Indicator lamp, BZ
... Buzzer, 32 ... Negative pressure adsorption device, 33 ... Plate glass, 34
... vacuum pad, 35 ... vacuum pump, 36
a, 36b ... Vacuum circuit, 37a, 37b ... Solenoid valve, 39a, 38b ... Pressure switch, 39 ... Control circuit

Claims (2)

[Claims] 1. An indicator lamp is provided in a hydraulic circuit of a cylinder for expanding and contracting a space between a pair of gripping members provided at a tip of an arm when the pressure of hydraulic oil supplied to the cylinder is equal to or higher than a pressure necessary for gripping. In a safety device of a vehicle for mounting and mounting interior materials equipped with a pressure switch to be turned on, a solenoid valve for switching the supply and discharge of hydraulic oil to and from the cylinder in the hydraulic circuit of the cylinder, and a setting for turning off the pressure switch by the pressure of the hydraulic oil When the value becomes less than or equal to the value, the solenoid valve is switched to supply the hydraulic oil to the cylinder, and the pressure of the hydraulic oil is equal to or more than a set value at which the pressure of the hydraulic oil is turned on even if a certain time has elapsed after switching the solenoid valve. A safety device for a vehicle mounted with an interior material, characterized in that a logic circuit is provided for issuing an alarm if the condition does not occur. 2. A vehicle for mounting and transporting an interior material, wherein a negative pressure adsorption device for adsorbing a flat interior material such as plate glass is provided at the tip of an arm, and the vacuum circuit of the negative pressure adsorption device detects the pressure of the vacuum circuit. A pressure switch is installed to rotate the vacuum pump when the pressure in the vacuum circuit exceeds the set value to turn off the pressure switch, and even if a certain time has elapsed after rotating the vacuum pump, the pressure in the vacuum circuit remains unchanged. A safety device for a vehicle mounted with an interior material, wherein a control circuit is provided for issuing an alarm when the value does not fall below a set value for turning on.