JPH0630206U - Safety guard device for compaction machines - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents the operator from being caught in the compaction roller and prevents damage. [Structure] An elastic bumper support member 10 having a length equal to or longer than a braking distance during normal work is projected from the ends of the front pressure roller and the rear pressure roller at the front and rear of the vehicle body, and the support member 10 has a wheel width of about the wheel width. Install the bumper 11 with the length of
When the worker C hits the support C, the support member 10 is displaced, and the switch 20 for detecting the displacement is turned on to give an alarm or brake. [Effect] Since the length of the support member 10 is equal to or longer than the braking distance during the normal work, the operator C is prevented from being caught in the pressure roller, and the support member 10 is elastic, so that the bumper 11 and the obstacle are blocked. Prevent damage.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a safety guard device for ensuring the safety of an operator working near a compaction machine used for rolling compaction of roadbed / roadbed and asphalt.

[0002]

[Prior art]

 Generally, when a compaction machine is used for asphalt rolling, etc., the compactor is driven at a speed of about 5 km / h after the finisher. However, in the vicinity of the finisher, several workers perform work. Therefore, there is a risk of involving the worker. In particular, with the recent aging and immaturity of workers, it is required to protect the safety of these workers.

Conventionally, an ultrasonic signal is used to detect that a vehicle is approaching an obstacle to issue an alarm. However, in this case, the noise of another machine may cause the alarm to be extinguished, or the alarm to be frequently generated. I was used to it because it was sounding so often that I didn't get the meaning of the alarm, and because it was noisy, I had to turn off the alarm device. Therefore, there is a problem in that the safety of workers cannot be achieved by simply providing an alarm device. In order to solve this problem, the technique of an automatic stop braking device such as Japanese Utility Model Laid-Open No. Sho 63-192912 has been disclosed. According to this technique, as shown in FIG. 6, the bumper brackets 103 and 104 of the front rolling roller 101 and the rear rolling roller 102 of the vehicle body 100 are made of a highly elastic material and have a pressure sensor 105 built therein. 106 was attached, and the braking device was activated by an electric signal due to the pressing force generated when the bumper 106 came into contact with an obstacle.

[0004]

[Problems to be solved by the device]

 However, since the protruding length of each bumper bracket 103, 104 is short, there is a high risk that an operator will be involved even if the braking device is operated. In particular, with the aging of workers, it is difficult to perform agile movements, and the danger is great. Furthermore, since the pressure-sensitive sensor 105 is attached to the bumper 106, the bumper brackets 103 and 104 cannot be made of an elastic material and a rigid material has to be used. Therefore, the load applied to the bumper brackets 103, 104 and the like at the time of collision becomes large, and not only the pressure sensor 105 and the bumper brackets 103, 104 are likely to be damaged, but also obstacles such as walls are damaged. There was a risk that An object of the present invention is to provide a safety guard device for a compaction machine which can ensure the safety of workers and prevent damage to vehicles and obstacles in paving work and the like.

[0005]

[Means for Solving the Problems]

 The compaction machine according to claim 1 is a safety guard device for a compaction machine in which a bumper support member for supporting a bumper is projected on a front portion or a rear portion of a vehicle body, wherein the bumper support member has elasticity. And, the protrusion length is set to be longer than the braking distance at the time of normal work from the vehicle body end, and a switch is provided to detect the displacement of the bumper support material when the bumper comes into contact with an obstacle. It is equipped with a control device that activates at least one of the braking device and the alarm device in the driver's seat based on the collision signal. In the problem solving means according to claim 2, an attachment device for detachably attaching the bumper support member to the vehicle body is provided, and the attachment device is formed on one of the vehicle body and the bumper support member, and the attachment rod. It is composed of a boss having a vertical mounting hole that allows the mounting rod to be mounted from above and below.

[0006]

[Action]

 In the problem solving means according to the above-mentioned claim 1, for example, at the time of paving work of asphalt, the final compacting machine is run after the finisher. At this time, because there are several workers around the finisher, it is necessary to drive while paying close attention to the workers. If the worker hits the bumper, the bumper support member is elastic, and therefore the bumper support member is elastically deformed. The displacement of the bumper support member is detected by the detection switch, and the control device activates the traveling braking device or activates the alarm device in the driver's seat to notify the driver to activate the braking device. At this time, since the protruding length of the bumper support member is set to be equal to or longer than the braking distance during the normal work of the vehicle, even if the worker hits the bumper, the bumper support member is elastically deformed and before the worker is caught in the wheel. It is safe to stop the vehicle at. Also, since the bumper support has elasticity, only the bumper support is deformed even if it collides with an obstacle, which prevents overloading the sensing switch and damage to obstacles such as walls. it can.

According to the second aspect, when performing paving work or the like, the bumper may be an obstacle, and for example, it may not be possible to roll to the wall. In this case, since the bumper support member is detachably attached to the vehicle body by the attachment device, the bumper support member can be easily removed from the vehicle body by pulling the bumper support member upward.

[0008]

【Example】

 1 is a side view of a compacting machine according to an embodiment of the present invention, FIG. 2 is a plan view of the compacting machine, FIG. 3 is a perspective view of the compacting machine, and FIG. 4 is a main part of a safety guard device. FIG. 5 is a side view and FIG. 5 is a perspective view showing a mounting state of the sensing switch.

As shown in FIGS. 1, 2, and 3, the compacting machine of this embodiment includes a front rolling roller 2 and a rear rolling roller 3 in front of and behind a vehicle body 1. The front pressure roller 2 is a steered wheel, and a fork 5 is rotatably supported by a front portion of the vehicle body 1 via a kingpin 4, and a frame-shaped front wheel support member 6 is fixed to the fork 5. A front rolling roller 2 is rotatably supported by the front wheel support member 6 and steered by a steering cylinder. The rear pressure roller 3 is a drive wheel and is driven by converting an output from an engine arranged near the center of the vehicle body 1 into a hydraulic drive system. The driver's seat 8 is arranged at the rear of the vehicle body 1.

A bumper support member 10 is projected from the front surface of the front wheel support member 6 and the rear surface of the vehicle body 1, and the bumper support member 10 has a lightweight length of about a wheel width A as shown in FIG. A bumper 11 made of pipe is attached. As shown in FIG. 4, the bumper support member 10 on the side of the front pressure roller is made of an elastic body 12 such as a rubber tube (a hydraulic hose or a water hose may be used) and a connecting rod 15 fixed at both ends by bands 13 and 14. , 16 in order to prevent the operator from being caught in the wheels 2 and 3 in the event of a collision, as shown in FIG. 1m) is set. The connecting rod 15 on the front wheel support member 6 side is bent into an L-shape as shown in FIG. 5, and a rectangular mounting rod 19b is formed at the lower end thereof. The mounting rod 19b is detachably fitted to a boss 18 having a rectangular vertical mounting hole 18a fixed to the front wheel support member 6. The boss 18 and the mounting rod 19b constitute a mounting device 19 that detachably mounts the bumper support member 10 to the vehicle body 1. On the other hand, the connecting rod 16 on the bumper 11 side is connected to the bumper 11 by welding or the like, as shown in FIG.

A switch 20 is provided to detect displacement of the bumper support member 10 when the bumper 11 contacts the obstacle C, and the braking device 21 is operated based on a collision signal from the switch 20. A control device 23 for activating the alarm device 22 of the driver's seat 8 is provided. As shown in FIGS. 4 and 5, the switch 20 includes a switch body 24 attached to the front wheel support member 6, a bumper support member 10 at an end thereof, and an operating rod 25 arranged in parallel with the displacement detection. In the switch, the tip end of the operating rod 25 is fitted to the switch holding member 26 fixed to the outer periphery of the elastic body 12. The holding member 26 is formed in a substantially U shape as shown in FIG. 5, and is fixed to the elastic body 12 by fixing both ends thereof with bolts 26a and the like. The switch 20 is configured to detect the elastic displacement of the holding member 26, that is, the elastic body 12, as the displacement of the operating rod 25. The bumper support member 10 on the rear side of the vehicle body is directly attached to the rear surface of the vehicle body 1, while the bumper support member 10 on the front rolling roller side is attached to the front wheel support member 6. Although different, the others are configured similarly.

In the case of a hydraulically driven vehicle, for example, the braking device 21 is composed of a brake built in the hydraulic motor. Further, the alarm device 22 is composed of an alarm buzzer (alarm lamp may be used, or both may be used together) arranged on the operation panel of the driver's seat 8. Further, the control device 23 is composed of a microcomputer or the like, and operates the braking device 21 and the alarm device 22 in response to a signal from the switch 20. It should be noted that when the braking device 21 is in operation, further work cannot be performed, so a reset switch 27 is provided on the operation panel of the driver's seat 8 and a braking device release signal is output from the control device 23 by the signal of this switch 27. Configured to do.

Further, when the diameter of the front rolling roller 2 is 1100 mm, the height of the bumper 11 is set to about 300 to 500 mm from the road surface. The height of the bumper 11 is set to be the same in the rear rolling roller 3 as well. Further, in FIG. 3, 29 is a scraper and 30 is a sprinkling nozzle part.

In the above structure, during the asphalt paving work, the compaction machine is run after the finisher. At this time, since there are several workers around the finisher, it is necessary to drive while paying close attention to the workers. If the worker C hits the bumper 11, the bumper support member 10 has elasticity, so that the bumper support member 10 elastically deforms as shown by the chain double-dashed line in FIG. The displacement of the bumper support member 10 is detected by the detection switch 20, and the control device 23 activates the traveling braking device 21 or activates the alarm device 22 of the driver's seat 8 to notify the driver of the braking. The device 21 is activated.

At this time, since the protruding length B of the bumper support member 10 is set to be equal to or longer than the braking distance (about 1 m) during the normal work of the vehicle, the speed at the time of asphalt rolling (3 to 3 for the load roller). Even if the worker hits the roller at 5 km / h and the tire roller at 5 to 7 km / h), the risk of being caught by the compaction rollers 2 and 3 is small. Further, since the bumper support member 10 has elasticity, even if the bumper 11 hits an obstacle (worker, wall, etc.), the bumper support member 10 is deformed before the bumper 11 is deformed. Therefore, unlike the conventional example shown in FIG. 6, the pressure-sensitive switch mounted on the bumper is not overloaded and an obstacle can be prevented from hitting the bumper 11 and being damaged. After activating the braking device 21, when the vehicle is to be avoided from an obstacle, the reset switch 27 on the operation panel of the driver's seat 8 is operated to brake the braking device 21 (in this embodiment, the brake of the hydraulic motor). After releasing, the vehicle can be moved backwards and work can be resumed.

In addition, in paving work or the like, the bumper 11 may be an obstacle, and for example, it may not be possible to roll on the wall. In this case, by removing the switch holding member 26 and then pulling out the bumper support member 10 upward, the bumper support member 10 and the bumper 11 can be easily removed from the vehicle body 1. Further, when the bumper support member 10 is mounted on the vehicle body side, the central mounting hole 18a and the mounting rod 19b of the boss 18 are square, so that the positioning thereof is easy.

In the above embodiment, the compacting machine having the bumpers 11 at the front and rear of the vehicle body 1 has been described, but the present invention is not limited to this, and the compacting machine having the bumpers 11 only at the front portion or only the rear portion of the vehicle body 1 is described. The present invention may be applied to a compacting machine. Further, in the above embodiment, the mounting rod 19b of the mounting device 19 is arranged on the bumper support member side, and the boss 18 is arranged on the vehicle body side. However, the boss 18 is arranged on the bumper support member side, and the boss 18 is arranged on the vehicle body side. The mounting rod 19b may be arranged. Further, in the above-described embodiment, the braking device 21 is operated, or the alarm device 22 of the driver's seat 8 is activated to notify the driver, and the braking device 21 is operated. In addition, a configuration may be added in which the vehicle is controlled so that the vehicle is automatically braked and retracted from the obstacle.

[0018]

[Effect of device]

 As described above, in the safety guard device for a compacting machine according to claim 1, the front or rear portion of the vehicle body is provided with the elastic bumper support member set to have a length equal to or more than the braking distance during normal work from the vehicle body end. Since it is provided, it is possible to prevent the operator from being caught in the wheel even if it hits. Further, since the bumper support member has elasticity, even if the bumper hits an obstacle such as an operator or a wall, it is possible to prevent the sensing switch or the like from being damaged or the obstacle from being damaged. In the safety guard device for the compacting machine according to claim 2, the bumper support member is detachably attached to the vehicle body, so that the bumper is an obstacle when performing paving work, for example, even when the bumper cannot be rolled up to the wall. By pulling the material upwards, the bumper support material and the bumper can be easily removed from the vehicle body.

[Brief description of drawings]

FIG. 1 is a side view of a compacting machine according to an embodiment of the present invention.

FIG. 2 is a plan view of the compaction machine.

FIG. 3 is a perspective view of a compaction machine.

FIG. 4 is a side view of the safety guard device of the compaction machine

FIG. 5 is a configuration diagram of a control unit including a sensing switch.

FIG. 6 is a side view of a safety guard device of a conventional compacting machine.

[Explanation of symbols]

 1: Vehicle main body 2, 3: Rolling roller 6: Front wheel supporting member 8: Driver's seat 10: Bumper supporting member 11: Bumper 12: Elastic body 15, 16: Connecting rod 18: Boss 18a: Mounting hole 19: Mounting device 19b: Mounting rod 20: Sensing switch 21: Braking device 22: Alarm device 23: Control device 25: Actuating rod 26: Switch holding material

Claims (2)

[Scope of utility model registration request] 1. A safety guard device for a compacting machine, wherein a bumper support member for supporting a bumper is projected on a front portion or a rear portion of a vehicle body, wherein the bumper support member has elasticity and has a protruding length. A switch is set to a length that is longer than the braking distance during normal work from the vehicle body end, and a switch that detects displacement of the bumper support material when the bumper comes into contact with an obstacle is provided. A compacting machine comprising a control device for activating either the device or the alarm device in the driver's seat. 2. The safety guard device for a compaction machine according to claim 1, further comprising a mounting device for removably mounting the bumper support member to the vehicle body, the mounting device being provided on one of the vehicle body and the bumper support member. A compaction machine comprising a formed mounting rod and a boss having a mounting hole in the vertical direction that allows the mounting rod to be mounted in the vertical direction.