JP2022071493A - Entry suppression device - Google Patents

Abstract

To provide an entry suppression device for suppressing the entry of a worker between construction vehicles by maintaining the tension of ropes between the construction vehicles and continuously calling attention even when the construction vehicles travel in parallel with each other while changing the interval between the vehicles.SOLUTION: An entry suppression device is provided with a rope 10 stretched between a pair of construction vehicles 1A and 1B, a winding part 20 provided on one construction vehicle 1A and winding or delivering the rope 10 according to the interval between the construction vehicles 1A and 1B, and a connection part 60 provided on the other construction vehicle 1B and connecting an end part 11 of the rope 10 to the construction vehicle 1B. The winding part 20 generates energizing force in the direction of winding the rope 10.SELECTED DRAWING: Figure 1

Description

Application for application of Article 30, Paragraph 2 of the Patent Law was announced on July 13, 2nd year of Reiwa on the company's website and 3 newspapers.

The present invention relates to a device for suppressing entry between construction vehicles traveling in parallel.

In order to prevent people from entering dangerous areas and vehicles from entering, ropes and tapes are used to call attention. For example, Patent Document 1 describes a vehicle entry warning device in which a tape is put between two cones installed on a road to notify that an accident handling or repair work is being performed on the road. This vehicle entry warning device is equipped with a winder that can wind up the excess part of the tape. In addition, when the vehicle enters while pushing the tape, the vehicle entry warning device pulls out the tape from the box into which the tip of the tape is inserted, turns on the switch, and issues an alarm.

Japanese Unexamined Patent Publication No. 10-74295

At the construction site, construction vehicles may run in parallel, and it is dangerous for workers or the like to enter the area between the construction vehicles. In such a case, it is conceivable to put a rope or the like between the vehicles to call attention. However, for example, at the construction site of concrete pavement by the set foam method, the laying vehicle and the compaction vehicle run in parallel, and the laying vehicle repeats the construction while moving forward and backward. That is, the vehicle travels while changing the distance between the vehicles. When the vehicles approach each other, the rope or the like will loosen and cannot function as a sign. Further, when the vehicles are separated from each other, the rope or the like cannot reach the sign and the sign may not be used, which may cause damage to the equipment or the like. As described above, there is a problem that it is difficult to continue to function as a sign even if a rope or the like is stretched between vehicles.
The present invention has been made to solve such a problem, and even if the construction vehicles run in parallel while changing the distance between the vehicles, the tension of the rope between the construction vehicles is maintained and caution is taken. The subject is to provide an entry control device that keeps the arousal and suppresses the entry of workers between construction vehicles.

In order to solve such a problem, the entry control device according to the present invention is provided on a rope stretched between a pair of construction vehicles and one of the construction vehicles, and is provided according to the distance between the construction vehicles. A winding portion for winding or unwinding the rope and a connecting portion provided on the other construction vehicle and connecting the end portion of the rope to the construction vehicle are provided, and the winding portion winds the rope. Generates an urging force in the winding direction.

According to this configuration, the entry control device generates an urging force in the direction of winding the rope, and the winding unit that winds or unwinds the rope according to the distance between the construction vehicles allows the space between the pair of construction vehicles. It is possible to maintain the tension of the ropes stretched in the building and continue to call attention, and to prevent workers from entering between the construction vehicles running in parallel.

In the entry control device according to the present invention, it is preferable that the winding portion generates the urging force by the elastic force of the elastic body.
According to this configuration, the entry restraint device does not require a power source such as a motor or an engine due to the winding portion that generates an urging force by the elastic force of the elastic body.

In the entry control device according to the present invention, it is preferable that the connecting portion connects the end portion of the rope to the other construction vehicle via the breaking portion having a breaking strength smaller than that of the rope.
According to this configuration, when the end of the rope is connected to the other construction vehicle through the rupture portion having a rupture strength smaller than that of the rope, and a large tension is applied to the rope and the rupture portion, the rope is more than the rope. Since the broken part breaks first, it is possible to predict the broken part and take safety measures.

In the entry control device according to the present invention, it is preferable that the connection portion has an elastic auxiliary rope provided between the rope and the other construction vehicle so as to straddle the break portion.
According to this configuration, when the broken portion is broken, the auxiliary rope provided across the broken portion is stretched, and the operation of the entry restraining device can be continued in an emergency. Further, by exhibiting elasticity of the auxiliary rope, it is possible to alleviate the impact when the rope is in a stretched state and to protect the entry restraining device.

In the entry control device according to the present invention, the connection portion includes an alarm unit connected between the end portion of the rope and the other construction vehicle, and the alarm unit includes a force at which the rope has a predetermined value or more. It is preferable to issue an alarm when the rope is pulled.
According to this configuration, for example, when a broken portion is broken and the end of the rope and the construction vehicle are separated from each other by a predetermined distance, the rope is pulled with a force equal to or higher than a predetermined value, and an alarm sound emitted by the alarm portion is used. , The driver can be notified of the abnormality.

The entry control device according to the present invention further includes a braking unit that brakes the winding operation of the rope by the winding unit, and the winding unit includes a winding shaft that rotates and winds the rope, and the winding shaft. It has a rotating plate that is fixed to the take-up shaft and rotates together with the take-up shaft, and the braking unit detects that the take-up shaft rotates faster than a predetermined speed and enters a detection state. It is preferable to have.
According to this configuration, the braking unit brakes the excessive winding operation of the rope by the winding unit by the detection unit that detects that the rotation of the winding shaft is faster than a predetermined speed, and the surrounding workers and the like. In addition to ensuring safety, it is possible to prevent damage to the entry control device.

In the entry control device according to the present invention, the detection unit has a string-shaped striking portion whose one end is fixed to the peripheral edge portion of the rotating plate and a target portion that is hit by the striking portion. It is preferable to detect that the rotation of the take-up shaft is faster than a predetermined speed depending on the magnitude of the striking force received from the striking portion.
According to this configuration, the detection unit rotates the take-up shaft faster than a predetermined speed depending on the magnitude of the impact force received by the target unit from the string-shaped impact unit whose one end is fixed to the peripheral edge of the rotating plate. Since this is detected, no electric power or electric circuit is required, and it is easy to use in combination with other devices.

The entry control device according to the present invention further includes a sign flag suspended from the rope and arranged along the rope at substantially regular intervals, and the number of sign flags arranged at substantially regular intervals is drawn out. It is preferable that the amount is increased or decreased according to the length of the rope.
According to this configuration, further attention can be drawn by the sign flags suspended from the rope and arranged at substantially regular intervals along the rope. In addition, the number of sign flags arranged at substantially regular intervals is increased or decreased according to the length of the pulled out rope, so that a stable alert effect can be obtained regardless of the length of the pulled out rope. You can continue.

According to the present invention, even if a pair of construction vehicles running in parallel run while changing the distance between the vehicles, the tension of the rope between the construction vehicles is maintained, the attention is continued, and the construction vehicle is used. It is possible to realize an entry control device that suppresses the entry of workers into the space. Further, the operation of the entry control device does not require an internal combustion engine, electric power, or the like.

It is a perspective view which shows the entry control device which concerns on embodiment provided between a pair of construction vehicles. It is a side view of the access control device which concerns on embodiment. It is a perspective view which shows a part of the winding part and the braking part before the braking part is activated. It is a perspective view which shows a part of a winding part and a braking part after the braking part is activated. It is a top view which shows the state which a part of the sign flag is stored.

An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the entry control device 100 according to the embodiment of the present invention is provided between a pair of construction vehicles 1A and 1B capable of independently moving forward and backward on the rail 2. The entry control device 100 is preferably provided on both the left and right sides of the construction vehicles 1A and 1B. The construction vehicles 1A and 1B do not have to travel on the rail 2 as long as they are parallel parking vehicles.
For example, the construction vehicle 1A is a concrete finishing device in the set foam method, and the construction vehicle 1B is a concrete leveling device.

As shown in FIG. 1, the entry control device 100 includes a rope 10 stretched between a pair of construction vehicles 1A and 1B, a take-up portion 20 provided on one construction vehicle 1A, and the other construction vehicle 1B. A rope 10 is stretched between the take-up portion 20 and the connection portion 60.

(rope)
The rope 10 is a member that serves as a warning sign indicating that it is a dangerous area. As the rope 10, a rope for calling attention (trarope) in which yellow and black are arranged alternately can be used. Further, it is preferable that the rope 10 is stretched substantially horizontally from the waist to the chest height so that there is no danger of the legs being taken off when the person accidentally enters the danger zone.

(Taking section)
The winding unit 20 is a device that winds or unwinds the rope 10 according to the distance between the construction vehicles 1A and 1B. The winding unit 20 generates an urging force in the direction of winding the rope 10, and if the external force for pulling out the rope 10 is larger than the urging force, the rope 10 is unwound. That is, when the construction vehicles 1A and 1B approach each other, the rope 10 is wound up by the urging force, and when the construction vehicles 1A and 1B are separated, the driving force of the construction vehicles 1A and 1B becomes an external force for pulling out the rope 10, and the rope 10 is unwound. Is done. Therefore, even if the distance between the construction vehicles 1A and 1B changes, the rope 10 is maintained.

The urging force of the winding portion 20 is generated by an elastic force, and can be generated by incorporating, for example, a mainspring. By utilizing the elastic force, the entry control device 100 does not need to draw in an external power source or electrical wiring, and can be installed anywhere. Then, it is possible to stably call attention without supplying electric power or the like.

(Connection part)
As shown in FIG. 1, the connecting portion 60 is a device for connecting the end portion 11 of the rope 10 to the side of the pair of construction vehicles 1A and 1B in which the winding portion 20 is not provided. The connection between the construction vehicles 1A and 1B and the end portion 11 of the rope 10 may be any method as long as it is easy to install and remove and can be securely hooked. For example, a hook or the like can be provided on the construction vehicle 1B, and the end portion 11 of the rope 10 can be hooked in a ring shape.

In the entry control device 100, as shown in FIG. 2, the connecting portion 60 connects the end portion 11 of the rope 10 to the construction vehicle 1B via the breaking portion 62. The broken portion 62 is made of, for example, a resin chain or the like. The breaking strength of the broken portion 62 is smaller than that of the rope 10. Therefore, when a large tensile load is applied to the rope 10 and the broken portion 62, the broken portion 62 breaks before the rope 10. By providing the fractured portion 62, the fractured portion can be predicted in advance.

The connecting portion 60 has an auxiliary rope 63 so as to straddle the broken portion 62 between the rope 10 and the construction vehicle 1B. The auxiliary rope 63 is provided in a relaxed state as an example. When the broken portion 62 is broken, the auxiliary rope 63 is stretched and the rope 10 can be maintained stretched. The auxiliary rope 63 may not be provided in a relaxed state.
The auxiliary rope 63 exhibits elasticity against elongation deformation. The auxiliary rope 63 is, for example, a rope made of rubber, and may be a rope including a metal spring. Since the auxiliary rope 63 exhibits elasticity, the impact when the auxiliary rope 63 is in a stretched state is alleviated, and the entry restraining device 100 can be protected.

An alarm unit 64 is connected between the end portion 11 of the rope 10 and the construction vehicle 1B. The alarm unit 64 is a device that emits an alarm sound when the end portion 11 of the rope 10 and the construction vehicle 1B are separated from each other by a predetermined distance. The alarm unit 64 has one end of the drawstring 66 connected to the main body portion 65, and when the drawstring 66 is pulled with a force equal to or higher than a predetermined value, an alarm sound is emitted from the main body portion 65. The other end of the drawstring 66 is fixed to the end 11 of the rope 10, and the main body 65 is connected to the construction vehicle 1B. Therefore, when the end portion 11 and the construction vehicle 1B are separated from each other by a predetermined distance, the drawstring 66 is pulled with a force equal to or higher than a predetermined value, and an alarm sound is emitted from the main body portion 65.
The driver of the construction vehicles 1A and 1B can stop the construction vehicles 1A and 1B by being notified of the abnormality by the alarm sound of the alarm unit 64, and the surrounding workers can take measures such as leaving the place. can. As the alarm unit 64, for example, a security buzzer of a type in which a switch is turned on when the string is pulled out or a type in which the switch is turned on when the pin is pulled out can be used.

(Brake part)
The braking unit 30 is a device that brakes the winding operation of the rope 10 by the winding unit 20. As shown in FIG. 3A, the support portion 25 that supports the take-up shaft 21 of the take-up portion 20 is fixed to the floor 23. The braking unit 30 is provided on the floor 23, and is composed of a detecting unit 35, a starting unit 40, and an extrusion unit 45. The floor 23 is provided with a wall 24 parallel to the take-up shaft 21, and two holes 26 penetrating the wall 24 are provided at the same height above the wall 24.

The detection unit 35 detects that the winding shaft 21 rotates faster than a predetermined speed, and enters a detection state. The detection unit 35 has a string-shaped striking portion 36 whose one end is fixed to the peripheral edge portion of the rotating plate 22, and a target portion 37 that is striked by the striking portion 36. The striking force received by the target portion 37 from the striking portion 36 increases as the winding shaft 21 rotates faster. Therefore, the detection unit 35 can detect that the rotation of the take-up shaft 21 is faster than a predetermined speed depending on the magnitude of the impact force received by the target unit 37 from the impact unit 36. It is preferable that the striking portion 36 has a length that strikes the end portion of the target portion 37 on the rotating plate 22 side when it is extended in a straight line. As a result, the striking force of the striking portion 36 can be efficiently applied to the target portion 37. Further, it is preferable that the striking portion 36 is made of a strong and not easily cut material such as aramid fiber.

The target portion 37 is a plate-shaped member, and is rotatably fixed to the upper end of the wall 24 with a hinge. The target portion 37 has a transmission pin 38 that protrudes parallel to the plate surface and opposes the winding portion 20 and rotates integrally with the target portion 37. The tip of the transmission pin 38 is hooked on the start pin 41 of the start unit 40, which will be described later.

The activation unit 40 activates the extrusion unit 45, which will be described later, when the detection unit 35 is in the detection state. The starting unit 40 has a retracting unit 42 that is urged from the first state to the second state. As shown in FIG. 3A, the state in which the retractable portion 42 is located near the hole 26 in the wall 24 is the first state, and as shown in FIG. 3B, the state in which the retracted portion 42 is located far from the hole 26 in the wall 24 is the second state. It is a state. The elastic force and gravity of the elastic body can be used for urging from the first state to the second state. As the elastic body, for example, a torsion coil spring can be used. In the entry restraint device 100, the position where the torsion coil spring is twisted is set as the first state. The retractable portion 42 rotates about the fixed shaft 44 by the elastic force of the torsion coil spring to reach the second state from the first state.
The start-up unit 40 further has a start-up pin 41 that is hooked on the lead-in portion 42 in the first state, and a locking tool 43 that supports the start-up pin 41. The retracting portion 42 is maintained in the first state by the starting pin 41 against the bias from the first state to the second state.

The extrusion unit 45 is activated by the activation unit 40 and operates so as to press the friction material 48 against the rotating plate 22. The winding shaft 21 and the rotating plate 22 are braked by the frictional force between the friction material 48 and the rotating plate 22. The extruded portion 45 has two strings 47, one end of which is fixed to the floor 23, and a columnar friction material 48 that is placed on the strings 47 and can roll on the floor 23. The string 47 is arranged so as to crawl from the fixed point 46 of the floor 23 to the wall 24 and climb the wall 24 along the wall 24. Then, the string 47 is bound to the retracting portion 42 of the starting portion 40 on the opposite surface of the wall 24 through the hole 26 at the upper part of the wall 24. The friction material 48 is placed on the string 47 in contact with the floor 23 and the wall 24. The friction material 48 is a material having elasticity against compressive deformation, and a material having a surface that is not slippery is preferable. As the friction material 48, for example, a columnar urethane sponge can be used.

(Operation of braking part)
Next, the operation of the braking unit 30 will be described.
FIG. 3A shows the states of the winding unit 20 and the braking unit 30 when the entry control device 100 is operating normally. The winding unit 20 winds and unwinds the rope 10 in accordance with the movements of the construction vehicles 1A and 1B, and maintains the tension of the rope 10. In FIG. 3A, the take-up shaft 21 and the rotary plate 22 rotate in the D1 direction, but the direction of rotation changes every moment according to the movements of the construction vehicles 1A and 1B. Since the rotation is slow during normal operation, the striking force of the striking portion 36 is weak. Therefore, even if the plate-shaped target portion 37 is hit by the hitting portion 36 with a downward force, the plate-shaped target portion 37 is kept in a substantially horizontal direction.

When the rope 10 is pulled out and the rope 10 is cut due to some trouble, for example, there is no external force to pull out the rope 10. At this time, the take-up unit 20 tries to take up the rope 10 by its own urging force, and the take-up shaft 21 and the rotary plate 22 continue to rotate in the D1 direction, which is the take-up direction. Therefore, the rotation becomes faster, and the hitting force of the hitting portion 36 becomes stronger. Then, the target portion 37 is hit by the hitting portion 36 with a downward hitting force, and the hitting force is larger than a predetermined magnitude. Will be.

In the normal operation, the retractable portion 42 is hooked on the starting pin 41 and is in the first state. When the target portion 37 faces downward, the transmission pin 38 rotates integrally with the target portion 37 and pulls out the activation pin 41 upward. When the starting pin 41 is pulled out, the retractable portion 42 loses the force to resist the urging from the first state to the second state and moves to the second state.
When the position of the retractable portion 42 moves from the first state to the second state, one end of the string 47 bound to the retractable portion 42 moves integrally with the retractable portion 42. Therefore, on the winding portion 20 side of the wall 24, the string 47 becomes shorter, and the string 47 separates from the floor 23 and the wall 24. By the movement of the string 47, the friction material 48 placed on the string 47 is pushed out in the direction of the winding portion 20.

The extruded friction material 48 rolls on the floor 23 in the direction of the take-up portion 20 and comes into contact with the rotary plate 22, and while being caught in the rotation of the rotary plate 22, enters under the rotary plate 22 and is stopped by the support portion 25. Will be done. Then, the rotation of the take-up shaft 21 and the rotating plate 22 is braked by the frictional force generated between the friction material 48 and the rotating plate 22.

In the entry control device 100, when the broken portion 62 is cut while the rope 10 is stretched between the construction vehicles 1A and 1B, the warning section 64 emits an alarm sound to notify the surroundings of the abnormality. Then, in a state where the auxiliary rope 63 is stretched, the stretch of the rope 10 can be maintained and the alerting can be continued. However, when the auxiliary rope 63 is further cut, there is no force to resist the external force for pulling out the rope 10, that is, the urging force in the direction of winding the rope 10 of the winding portion 20. Therefore, the take-up unit 20 continues only the take-up operation, and the take-up shaft 21 and the rotary plate 22 rotate faster. This state is dangerous because the rope 10, the end portion 11 of the rope 10, the members around them, and the like may move unpredictably. The braking unit 30 can brake the operation of the winding unit 20 that attempts to continue only winding, and can enhance the safety of the entry control device 100. Further, the braking unit 30 does not require electric power, an electric circuit, or the like, and is easy to use in combination with other devices. The braking unit 30 can be incorporated and used as it is in the entry control device 100 which is not provided with an external power source or an electric wiring.

(Sign flag)
The sign flag 71 is an additional sign for further enhancing the effect of alerting by the rope 10. As shown in FIG. 2, the sign flag 71 is suspended from the rope 10 via the ring 75. Each sign flag 71 is connected by a connecting rope 72 with its right end connected to the sign flag 71 adjacent to the right and its left end connected to the sign flag 71 adjacent to the left. One end of the sign flag 71 closest to the take-up section 20 is connected to the construction vehicle 1A provided with the take-up section 20.
On the end 11 side of the sign flag 71 closest to the end 11 of the rope 10, there is a leading ring 74 from which the sign flag 71 is not suspended, and one end of the sign flag 71 closest to the end 11 and the connecting rope 72. Are linked by. Further on the end 11 side of the lead ring 74, there is a magnet 73 fixed to the rope 10. The leading ring 74 is made of a material such as iron that attaches to a magnet. On the other hand, the ring 75 on which the sign flag 71 is suspended is made of a material such as plastic that does not stick to a magnet.

When the rope 10 is not pulled out, the sign flag 71 is housed so as to overlap with the magnet 73, the leading ring 74 and the ring 75 on the side of the construction vehicle 1A. When the rope 10 is pulled out, the magnet 73 fixed to the rope 10 is pulled out, the leading ring 74 is pulled out by the magnet 73, and the sign flag 71 is pulled out by the connecting rope 72. Therefore, if the rope 10 is pulled out shortly, the number of sign flags 71 to be pulled out is small, and if the rope 10 is pulled out long, a large number of sign flags 71 are pulled out. When the rope 10 is further pulled out, all the sign flags 71 are pulled out, and the leading ring 74 separates from the magnet 73. Therefore, no further tensile load is applied to the connecting rope 72 and the sign flag 71.

When the pulled out rope 10 is wound up, it is stored so as to overlap with the side of the construction vehicle 1A in order from the sign flag 71 on the side closer to the winding unit 20. Then, when the rope 10 is pulled out again, the stored sign flag 71 is pulled out again. That is, the number of the drawn sign flags 71 is increased or decreased according to the length of the pulled out rope 10. Further, since the connecting ropes 72 connecting the adjacent sign flags 71 have the same length, the drawn sign flags 71 have a substantially constant interval. The number of sign flags 71 arranged at substantially regular intervals is increased or decreased according to the length of the pulled out rope 10. Therefore, the sign flag 71 can continue a stable alerting effect regardless of the length of the pulled out rope 10.

The sign flag 71 has front and back sides, and as shown in FIG. 4, the connecting rope 72 connecting the front surfaces of the adjacent sign flags 71 and the connecting rope 72 connecting the back surfaces are alternately arranged. Therefore, when the rope 10 is wound up, the front surfaces and the back surfaces of the rope 10 are stored so as to face each other in order from the sign flag 71 on the side closer to the winding portion 20. If the sign flag 71 is randomly stored, the sign flag 71 and the connecting rope 72 may become entangled and cause cutting or the like. By being stored with regularity in this way, the sign flag 71 can be stably repeated withdrawal and storage.

1A, 1B Construction vehicle 2 Rail 10 Rope 11 End 20 Winding part 21 Winding shaft 22 Rotating plate 23 Floor 24 Wall 25 Support part 26 Hole 30 Braking part 35 Detection part 36 Strike part 37 Target part 38 Transmission pin 40 Starting part 41 Starter pin 42 Pull-in part 43 Locking tool 44 Fixed shaft 45 Extruded part 46 Fixed point 47 String 48 Friction material 60 Connection part 62 Breaking part 63 Auxiliary rope 64 Warning part 71 Sign flag 72 Connecting rope 73 Magnet 74 Leading ring 75 Ring

Claims (8)

A rope stretched between a pair of construction vehicles,
A winding unit provided on one of the construction vehicles and for winding or unwinding the rope according to the distance between the construction vehicles.
Provided with a connecting portion provided on the other construction vehicle and connecting the end of the rope to the other construction vehicle.
The winding unit is an entry control device that generates an urging force in the direction in which the rope is wound. The entry restraining device according to claim 1, wherein the winding portion generates the urging force by the elastic force of the elastic body. The entry control device according to claim 1 or 2, wherein the connecting portion connects an end portion of the rope to the construction vehicle via a breaking portion having a breaking strength smaller than that of the rope. The entry control device according to claim 3, wherein the connecting portion has an elastic auxiliary rope provided between the rope and the other construction vehicle so as to straddle the fractured portion. The connection includes an alarm that is connected between the end of the rope and the other construction vehicle.
The entry control device according to any one of claims 1 to 4, wherein the alarm unit issues an alarm when the rope is pulled with a force equal to or higher than a predetermined value. A braking unit for braking the winding operation of the rope by the winding unit is further provided.
The take-up portion has a take-up shaft for rotating and winding the rope, and a rotating plate fixed to the take-up shaft and rotating together with the take-up shaft.
The entry control device according to any one of claims 1 to 5, wherein the braking unit has a detection unit that detects that the winding shaft rotates faster than a predetermined speed and enters a detection state. The detection unit has a string-shaped striking portion whose one end is fixed to the peripheral edge portion of the rotating plate and a target portion that is hit by the striking portion, and the striking force that the target portion receives from the striking portion. The entry control device according to claim 6, which detects that the rotation of the take-up shaft is faster than a predetermined speed depending on the size. Further equipped with sign flags suspended from the rope and lined up along the rope at approximately regular intervals.
The entry control device according to any one of claims 1 to 7, wherein the number of sign flags arranged at substantially regular intervals is increased or decreased according to the length of the pulled out rope.

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