JP7531369B2 - Rolling Machine - Google Patents

Description

The present invention relates to a rolling machine, and in particular to a rolling machine equipped with an entrapment prevention device.

Some rolling machines are equipped with an anti-entanglement device to prevent workers working nearby from getting caught in the wheels (for example, Patent Document 1).

The entrapment prevention device described in Patent Document 1 is configured to include a fixed part, which is a metal fence whose upper end is fixed to the front part of the front wheel support part, and a movable part, which is a metal fence whose upper end is attached to the lower end of the fixed part, for example via a hinge, and whose lower end can rotate rearward.

The entrapment prevention device described in Patent Document 1 is configured to detect when an obstacle is about to be entrapped in the front wheels when the obstacle comes into contact with the movable part and the lower end of the movable part rotates rearward. Furthermore, when the entrapment prevention device detects that an obstacle is about to be entrapped in the front wheels, it is configured to issue a predetermined warning or the like to the operator of the rolling machine and workers working around the rolling machine.

JP 2019-157407 A

Meanwhile, a rolling machine may perform compaction work on road surfaces with large steps, for example, and there is a risk that the movable part of the entrapment prevention device may come into contact with the steps during the compaction work. In addition, the rolling machine may be loaded onto a transport vehicle for transport to a work site, for example, and there is a risk that the movable part of the entrapment prevention device may come into contact with the transport vehicle during the loading work. In this way, when the entrapment prevention device comes into contact with an obstacle other than the obstacle that is originally intended to be detected, the work performed by the rolling machine (for example, compaction work or loading work) may be temporarily interrupted. In order to prevent temporary interruptions to compaction work, etc., the entrapment prevention device may be temporarily removed depending on the work content.

However, if the entrapment prevention device is temporarily removed from the rolling machine during compaction work, it will need to be reinstalled if the work content changes, and if the entrapment prevention device is temporarily removed from the rolling machine during loading work, it will need to be reinstalled when compaction work begins. And since the work etc. is temporarily interrupted while such reinstallation work is being carried out, there is a risk that the progress of work will become inefficient.

The present invention was made in consideration of these problems, and its purpose is to provide a rolling machine that allows work to be carried out efficiently without the need for temporary installation and removal of an entrapment prevention device.

In order to achieve the above-mentioned object, the rolling machine of the present invention comprises a body, front and rear wheels rotatably supported on the front and rear sides of the body, a first detection device configured to detect obstacles in front of the body, a second detection device configured to detect obstacles behind the body, an alarm device, a control device that controls the alarm device based on obstacle information detected by the first detection device and the second detection device, a first entanglement prevention device attached to the body and arranged in front of the front wheels, and a second entanglement prevention device attached to the body and arranged behind the rear wheels, wherein at least one of the first entanglement prevention device and the second entanglement prevention device are attached to the body so as to be movable in the vertical direction between a use position and a non-use position, the use position is located outside the detection range of the first detection device and the second detection device, and the non-use position is located within the detection range of the first detection device and the second detection device .

According to the rolling machine of the present invention, at least one of the first and second entrapment prevention devices is attached to the machine body so as to be movable in the vertical direction between the use position and the non-use position. Therefore, even when performing work in which the first and second entrapment prevention devices may come into contact with an obstacle, such as compacting a road surface with a large step or loading a transport vehicle, the entrapment prevention device can be moved to the upper side (non-use position) to avoid the entrapment prevention device coming into contact with the obstacle. In addition, since the first and second entrapment prevention devices can be moved up and down to accommodate changes in the work content, it is not necessary to reinstall the entrapment prevention device when the work content is changed. In this way, it is possible to avoid contact with obstacles other than those that the entrapment prevention device is intended to detect, and it is possible to avoid temporary interruptions to work, etc. due to reinstallation of the entrapment prevention device, and the work can be carried out efficiently. In addition, according to the rolling machine of the present invention, at least one of the first and second entrapment prevention devices is outside the detection range of the first and second detection devices when it is located on the lower side (use position). Therefore, even when compaction work or the like is performed with the entrapment prevention device located on the lower side, the entrapment prevention device is not detected by the first and second detection devices. Therefore, erroneous detection of the entrapment prevention device by the detection device is avoided, and thus temporary interruption of work is avoided, and work can be efficiently progressed. In this way, it is possible to provide a rolling machine that makes it possible to efficiently progress work while suppressing contact with the entrapment prevention device. Furthermore, according to the rolling machine of the present invention, at least one of the first and second entrapment prevention devices is within the detection range of the first and second detection devices when it is located on the upper side (non-use position). Therefore, even when working with a compaction machine with the first entrapment prevention device and the second entrapment prevention device in the non-use position (i.e., when the entrapment prevention function is not being activated), the operator in the driver's seat can reliably recognize the operating status of the first entrapment prevention device and the second entrapment prevention device.

FIG. 2 is a right side view showing the schematic configuration of a rolling compaction machine according to one embodiment of the present invention, illustrating the state in which the entrapment prevention device is positioned on the lower side, and also illustrating the control by the ECU. FIG. 2 is a right side view showing the schematic configuration of a rolling machine according to one embodiment of the present invention, in which the entrapment prevention device is positioned on the upper side. FIG. 2 is a front view of the rolling machine shown in FIG. 1 . FIG. 2 is a rear view of the rolling machine shown in FIG. 1 . FIG. 13 is a schematic diagram showing a modified example of an entanglement prevention device according to an embodiment of the present invention. FIG. 13 is a schematic diagram showing another modified example of an entanglement prevention device according to an embodiment of the present invention.

The following describes an embodiment of the present invention with reference to the drawings.

Figure 1 is a right side view showing the schematic configuration of a rolling machine 1 according to one embodiment of the present invention, showing the state in which the entrapment prevention device 60 is located on the lower side (use position) and also showing control by an ECU 40 (control device). Figure 2 is a right side view showing the schematic configuration of a rolling machine 1 according to one embodiment of the present invention, showing the state in which the entrapment prevention device 60 is located on the upper side (non-use position). Figure 3 is a front view of the rolling machine 1 shown in Figure 1. Figure 4 is a rear view of the rolling machine 1 shown in Figure 1.

For ease of explanation, "front," "rear," "left," and "right" are defined based on the traveling direction of the rolling machine 1 as seen by the operator in the driver's seat 16, and "up" and "down" are defined based on gravity. That is, the "front" and "rear" arrows shown in each figure indicate the forward and backward directions of the rolling machine 1, the "left" and "right" arrows indicate the left-right (vehicle width) direction of the rolling machine 1, and the "up" and "down" arrows indicate the up-down direction of the rolling machine 1.

The rolling machine 1 is a so-called tire roller that flattens and compacts asphalt to pave roads, and is equipped with a machine body 10 and wheels 20 as shown in FIG. 1. The wheels 20 are, for example, made of rubber tires, and are composed of front wheels 22 rotatably supported on the front side of the machine body 10, and rear wheels 24 rotatably supported on the rear side of the machine body 10. Specifically, the front wheels 22 and rear wheels 24 are rotatably supported by a front wheel support section 12 and a rear wheel support section (not shown) described later. The front wheels 22 and rear wheels 24 are arranged in a row with a predetermined interval between them in the left-right direction. In addition, in FIG. 1 and FIG. 2, the front wheels 22 in the straight-traveling state of the rolling machine 1 are shown by solid lines, and a part of the front wheels 22 in the turning state of the rolling machine 1 is shown by two-dot chain lines. In other words, the front end of the front wheels 22 in the turning state is located forward of the front end of the front wheels in the straight-traveling state.

As shown in FIG. 1, the machine body 10 is configured to include a main body 11, a front wheel support 12, a driver's seat 16, and a fall prevention fence 18. A front wheel support 12 is provided on the front side of the main body 11, and the front wheel support 12 is configured to rotate left and right in response to the operation of a handle, which will be described later. A rear wheel support (not shown) that rotatably supports a rear wheel 24 is provided on the rear side of the main body 11. A driver's seat 16 is provided on the upper side of the main body 11. A handle (not shown) that is operated by an operator is provided within the driver's seat 16, and the front wheel support 12 rotates left and right when the operator operates the handle, which in turn rotates the front wheel 22 left and right. A fall prevention fence 18 is provided behind the driver's seat 16 on the main body 11.

Furthermore, the main body 11 is provided with an engine room (not shown), in which an HST system is arranged. The HST system is composed of an engine, a hydraulic pump for traveling, a gear pump, a hydraulic motor for traveling, etc. This HST is a so-called hydraulic continuously variable transmission that uses the driving force of the engine to operate pumps such as the hydraulic pump for traveling and the gear pump to circulate hydraulic oil, and is capable of driving, decelerating, and stopping the machine body 10 by circulating the hydraulic oil. Note that the configuration of the HST itself is well known, so a detailed description thereof will be omitted.

As shown in FIG. 1, the rolling machine 1 further includes sensors 30 provided at the front and rear of the machine body 10, an ECU 40 provided on the machine body 10, a warning lamp 50 (alarm device) provided near the driver's seat 16, and an entrapment prevention device 60 provided at the front and rear of the machine body 10.

The sensor 30 includes a front sensor 32 (first detection device) configured to detect an obstacle in front of the machine body 10, and a rear sensor 34 (second detection device) configured to detect an obstacle in the rear of the machine body 10. As shown in FIG. 1, the front sensor 32 is attached to the front side of the main body 11, and the rear sensor 34 is attached to the fall prevention fence 18. The front sensor 32 and the rear sensor 34 are infrared sensors that irradiate infrared rays to the front and rear of the machine body 10, receive the reflected infrared rays, and detect obstacles by the received infrared rays. As shown in FIG. 1 and FIG. 2, the front sensor 32 has a detection range set between a detection range upper limit value A and a detection range lower limit value B, and the rear sensor 34 has a detection range set between a detection range upper limit value C and a detection range lower limit value D.

While each of the front sensor 32 and the rear sensor 34 has a predetermined detection range based on its own performance, the ECU 40 actually controls the detection ranges of the front sensor 32 and the rear sensor 34 to be limited to a predetermined range. For this reason, the "detection range" used in this specification and claims does not mean the limit of the detection range based on the performance of the front sensor 32 and the rear sensor 34 themselves, but means the detection range limited to a predetermined range by the ECU 40. In this embodiment, the detection range in the left-right direction by the front sensor 32 and the rear sensor 34 is set to be equal to or approximately equal to the width direction length of the aircraft 10.

As shown in FIG. 1, the ECU 40 is configured to receive obstacle information detected by the front sensor 32 and the rear sensor 34, and transmit a predetermined notification signal to the warning lamp 50 based on the obstacle information. Specifically, the ECU 40 is configured to determine whether or not there is an obstacle in front of and behind the vehicle 10 based on the obstacle information received from the front sensor 32 and the rear sensor 34, and transmit a predetermined notification signal to the warning lamp 50 if it determines that an obstacle is present. This causes a warning to be issued to workers around the vehicle 10 and the operator in the driver's seat 16 via the warning lamp 50. The ECU 40 is a control device for performing comprehensive control including engine operation control, and is configured to include input/output devices, memory devices (ROM, RAM, non-volatile RAM, etc.), a central processing unit (CPU), etc.

As shown in FIG. 1, the front sensor 32 and the rear sensor 34 are electrically connected to the input side of the ECU 40. This allows the ECU 40 to determine whether or not an obstacle is present in front of and behind the vehicle 10 based on the obstacle information received from the front sensor 32 and the rear sensor 34. In addition, the warning lamp 50, the front sensor 32, and the rear sensor 34 are electrically connected to the output side of the ECU 40. The warning lamp 50 is configured to receive a notification signal from the ECU 40 and notify the operator of the obstacle information based on the notification signal. Specifically, the ECU 40 turns on the warning lamp 50 to allow the operator or the like around the vehicle 10 to visually recognize and warn the operator. In addition, the front sensor 32 and the rear sensor 34 receive a detection range change signal transmitted from the ECU 40, and the settings of the detection range upper limit value A and lower limit value B of the front sensor 32 and the detection range upper limit value C and lower limit value D of the rear sensor 34 are changed based on the signal.

As shown in Figures 1 to 4, the entanglement prevention device 60 is attached to the machine body 10 and includes a front entanglement prevention device 62 (first entanglement prevention device) disposed in front of the front wheels 22, a rear entanglement prevention device 64 (second entanglement prevention device) attached to the machine body 10 and disposed behind the rear wheels 24, and a handle 66 for an operator or the like to operate the front entanglement prevention device 62 and the rear entanglement prevention device 64.

As shown in FIG. 1, the front entrapment prevention device 62 includes a front support part 62a fixed to the front part of the front wheel support part 12, a front link part 62b rotatably attached to the front support part 62a at the base end, and a front guard fence 62c rotatably attached to the tip end of the front link part 62b.

As shown in FIG. 1, the front support part 62a is a flat metal member fixed to the front part of the front wheel support part 12 and disposed in front of the front wheel 22. The front support part 62a includes a side surface facing in the left-right direction. In addition, as shown in FIG. 3, two front link parts 62b are disposed at a distance in the left-right direction. Each of the front link parts 62b is composed of a pair of rod-shaped metal members disposed at a distance in the up-down direction as shown in FIG. 1. Each of the front link parts 62b is supported rotatably on the side surface of the front support part 62a as shown in FIG. 1. Of the two front link parts 62b, only the front link part disposed on the right side is shown in FIG. Furthermore, the front guard fence 62c is a metal fence formed in a lattice shape by a plurality of rod-shaped members and has a mesh-like member disposed in the part that opens in the front-rear direction as shown in FIG. 3.

As shown in FIG. 1, when the front guard fence 62c is in the lower position (usage position), the front entrapment prevention device 62 positions the front guard fence 62c in front of the front wheels 22 while narrowing the gap between the fence and the road surface to prevent obstacles from being entrapped in the front wheels 22. Note that in FIG. 1 and FIG. 2, the front guard fence 62c when the rolling machine 1 is moving straight is shown by a solid line, and a part of the front guard fence 62c when the rolling machine 1 is turning is shown by a two-dot chain line. In other words, the frontmost end of the front guard fence 62c in the turning state is located forward of the frontmost end of the front guard fence 62c in the straight-moving state.

As shown in FIG. 1, the rear anti-entanglement device 64 includes a rear support part 64a fixed to the rear of the main body 11, a rear link part 64b rotatably attached to the rear support part 64a at the base end, and a rear guard fence 64c rotatably attached to the tip end of the rear link part 64b.

As shown in FIG. 1, the rear support 64a is a flat metal member fixed to the rear of the main body 11 and disposed behind the rear wheel 24. The rear support 64a includes a side surface facing in the left-right direction. In addition, as shown in FIG. 4, two rear link portions 64b are disposed spaced apart in the left-right direction. Each rear link portion 64b is composed of a pair of rod-shaped metal members disposed spaced apart in the up-down direction as shown in FIG. 1. Each rear link portion 64b is supported rotatably on the side surface of the front support portion 62a as shown in FIG. 1. Of the two rear link portions 64b, only the rear link portion disposed on the right side is shown in FIG. Furthermore, the rear guard fence 64c is a metal fence formed in a lattice shape by a plurality of rod-shaped members and has a mesh-like member disposed in the portion opening in the front-rear direction as shown in FIG. 4.

As shown in FIG. 1, when the rear guard fence 64c is in the lower position (usage position), the rear entrapment prevention device 64 positions the rear guard fence 64c behind the rear wheel 24 and narrows the gap between the fence and the road surface to prevent obstacles, etc. from being entrapped by the rear wheel 24.

The front entrapment prevention device 62 and the rear entrapment prevention device 64 are attached to the machine body 10 so as to be movable in the vertical direction between the use position and the non-use position. Specifically, as shown in FIG. 1 and FIG. 2, the front entrapment prevention device 62 is configured to rotate in the vertical direction with the base end side of the front link part 62b supported by the front support part 62a as a base point. As a result, in the front entrapment prevention device 62, the front guard fence 62c supported on the tip side of the front link part 62b moves in the vertical direction. Similarly, the rear entrapment prevention device 64 is configured to rotate in the vertical direction with the base end side of the rear link part 64b supported by the rear support part 64a as a base point. As a result, in the rear entrapment prevention device 64, the rear guard fence 64c supported on the tip side of the rear link part 64b moves in the vertical direction. It is not necessary that both the front anti-entanglement device 62 and the rear anti-entanglement device 64 are attached to the machine body 10 so that they can move in the vertical direction; only one of them may be movable in the vertical direction.

The front entrapment prevention device 62 and the rear entrapment prevention device 64 are outside the detection range of the front sensor 32 and the rear sensor 34 in the use position (positioned at the lower side). Specifically, as shown in FIG. 1, the front entrapment prevention device 62 is configured so that, in the use position, the front guard fence 62c located at the forefront of the front entrapment prevention device 62 is positioned rearward and lower than the lower limit value B of the detection range of the front sensor 32. The front entrapment prevention device 62 is configured so that the front guard fence 62c is positioned outside the detection range of the front sensor 32 (rearward and lower than the lower limit value B of the detection range) even when the rolling machine 1 is in a rotating state (see the two-dot chain line in FIG. 1). The rear anti-entanglement device 64 is configured such that, when positioned at the bottom, the rear support portion 64a and the rear guard fence 64c located at the rearmost part of the rear anti-entanglement device 64 are positioned forward and below the lower limit value D of the detection range of the rear sensor 34. It is not necessary for both the front anti-entanglement device 62 and the rear anti-entanglement device 64 to be outside the detection range of the front sensor 32 and the rear sensor 34 in the usage position, and only one of them may be outside the detection range of the front sensor 32 and the rear sensor 34 in the usage position.

In addition, the front entrapment prevention device 62 and the rear entrapment prevention device 64 are located within the detection range of the front sensor 32 and the rear sensor 34 in the non-use position (upper position). Specifically, as shown in FIG. 2, both the front entrapment prevention device 62 and the rear entrapment prevention device 64 are configured to be fixed, for example, using a stopper pin or the like, in the non-use position (upper position). More specifically, the front entrapment prevention device 62 is configured so that the front guard fence 62c is at least partially located forward and above the lower limit value B of the detection range of the front sensor 32 in the non-use position (upper position). The front entrapment prevention device 62 is configured so that the front guard fence 62c is at least partially located within the detection range of the front sensor 32 (forward and above the lower limit value B of the detection range) even when the rolling machine 1 is in a straight-ahead state (see solid line in FIG. 1). The rear anti-entanglement device 64 is configured such that, in the non-use position (upper position), the rear guard fence 64c is at least partially located rearward and above the lower limit value D of the detection range of the rear sensor 34. Note that it is not necessary for both the front anti-entanglement device 62 and the rear anti-entanglement device 64 to be located within the detection range of the front sensor 32 and the rear sensor 34 in the non-use position, and only one of them may be located within the detection range of the front sensor 32 and the rear sensor 34 in the non-use position.

In this embodiment, the lower limit value B (FIG. 1) of the detection range of the front sensor 32 when the front guard fence 62c is in the lower position is set differently from the lower limit value B (FIG. 2) of the detection range of the front sensor 32 when the front guard fence 62c is in the upper position. The lower limit value B of the detection range of the front sensor 32 may be automatically changed by the ECU 40 in response to the vertical movement of the front guard fence 62c, or may be changed as appropriate in response to a predetermined operation by the operator in the driver's seat 16.

The handle 66 is provided on the front anti-entanglement device 62 and the rear anti-entanglement device 64. Specifically, as shown in Figs. 3 and 4, the handle 66 includes a front handle 66a (Fig. 3) provided on the front guard fence 62c, and a rear upper handle 66b and a rear lower handle 66c (Fig. 4) provided on the rear guard fence 64c. As shown in Fig. 3, the front handle 66a is formed by a portion extending in the left-right direction on the front guard fence 62c. As shown in Fig. 4, the rear upper handle 66b is a portion provided on the upper part of the rear guard fence 64c and is formed by a separate member attached to the rear guard fence 64c. The rear lower handle 66c is a portion provided on the lower part of the rear guard fence 64c and is formed by a portion extending in the left-right direction on the rear guard fence 64c. The rear upper handle 66b and the rear lower handle 66c are prepared in consideration of the fact that workers have different physiques. Note that the handle 66 may be provided on only one of the front anti-entanglement device 62 and the rear anti-entanglement device 64.

The front handle 66a is outside the detection range of the front sensor 32 when the front anti-entrapment device 62 is in the use position (positioned at the lower side). Specifically, the front handle 66a is configured to be located rearward and lower than the lower limit value B of the detection range of the front sensor 32 when the front anti-entrapment device 62 is in the use position. The front handle 66a is configured to be located outside the detection range of the front sensor 32 (rearward and lower than the lower limit value B of the detection range) even when the rolling machine 1 is in a rotating state (see the two-dot chain line in FIG. 1). In addition, the rear upper handle 66b and the rear lower handle 66c are outside the detection range of the rear sensor 34 when the rear anti-entrapment device 64 is in the use position. Specifically, the rear upper handle 66b and the rear lower handle 66c are configured to be located forward and below the lower limit D of the detection range of the rear sensor 34 when the rear anti-entanglement device 64 is in the usage position.

Furthermore, the handles 66 are attached to the front anti-entanglement device 62 and the rear anti-entanglement device 64 so that at least a part of the operator is located within the detection range of the front sensor 32 and the rear sensor 34 when the operator operates the device. Specifically, as shown in FIG. 3, the front handle 66a is provided in the center or approximately the center of the front guard fence 62c in the left-right direction. Also, as shown in FIG. 4, the rear upper handle 66b and the rear lower handle 66c are provided in the center or approximately the center of the rear guard fence 64c in the left-right direction.

Next, we will explain the operation and effects of the compaction machine 1 according to one embodiment of the present invention.

According to the rolling machine 1 according to one embodiment of the present invention, at least one of the front entrapment prevention device 62 and the rear entrapment prevention device 64 is attached to the machine body 10 so as to be movable in the vertical direction between the use position and the non-use position. For this reason, even when performing work in which the front entrapment prevention device 62 and the rear entrapment prevention device 64 may come into contact with an obstacle, such as compacting a road surface with a large step or loading a transport vehicle, the front entrapment prevention device 62 and the rear entrapment prevention device 64 can be moved to the upper side (non-use position) to avoid the front entrapment prevention device 62 and the rear entrapment prevention device 64 coming into contact with an obstacle. In addition, since the front entrapment prevention device 62 and the rear entrapment prevention device 64 can be moved up and down to accommodate changes in the work content, there is no need to reinstall the front entrapment prevention device 62 and the rear entrapment prevention device 64 when the work content is changed. In this way, it is possible to avoid contact with obstacles other than those that are intended to be detected by the front and rear entrapment prevention devices 62 and 64, and it is also possible to avoid temporary interruptions to compaction work, etc., due to reinstallation of the front and rear entrapment prevention devices 62 and 64, allowing work to proceed efficiently. Furthermore, by moving the front and rear entrapment prevention devices 62 and 64 to the upper side (non-use position), it becomes possible to easily visually confirm the front and rear entrapment prevention devices 62 and 64, and the operating status of the front and rear entrapment prevention devices 62 and 64 can be grasped at a glance.

In addition, according to the rolling machine 1 according to one embodiment of the present invention, at least one of the front entrapment prevention device 62 and the rear entrapment prevention device 64 is outside the detection range of the front sensor 32 and the rear sensor 34 in the use position (positioned at the lower side). Therefore, even when compaction work or the like is performed with the front entrapment prevention device 62 and the rear entrapment prevention device 64 positioned at the lower side, the front entrapment prevention device 62 and the rear entrapment prevention device 64 are not detected by the front sensor 32 and the rear sensor 34. Therefore, erroneous detection of the front entrapment prevention device 62 and the rear entrapment prevention device 64 by the front sensor 32 and the rear sensor 34 is avoided, and temporary interruption of work is avoided, and work can be efficiently progressed. In this way, it is possible to provide a rolling machine 1 that enables work to be efficiently progressed while suppressing contact with the front entrapment prevention device 62 and the rear entrapment prevention device 64.

In addition, according to the rolling machine 1 of one embodiment of the present invention, at least one of the front entrapment prevention device 62 and the rear entrapment prevention device 64 is attached to the machine body 10 so as to be rotatable in the vertical direction. Therefore, as described above, it is possible to efficiently proceed with work while suppressing contact with the front entrapment prevention device 62 and the rear entrapment prevention device 64, and when rotating the front entrapment prevention device 62 and the rear entrapment prevention device 64 in the vertical direction, the front entrapment prevention device 62 and the rear entrapment prevention device 64 can be moved with less force by using, for example, a link mechanism (front link portion 62b and rear link portion 64b).

In addition, according to the rolling machine 1 according to one embodiment of the present invention, the handle 66 is outside the detection range of the front sensor 32 and the rear sensor 34 when the front entrapment prevention device 62 and the rear entrapment prevention device 64 are in the use position (positioned at the bottom). Furthermore, the handle 66 is attached to the front entrapment prevention device 62 and the rear entrapment prevention device 64 so that the worker is located within the detection range of the front sensor 32 and the rear sensor 34 when operating the machine. For this reason, even when compaction work or the like is performed with the front entrapment prevention device 62 and the rear entrapment prevention device 64 in the use position, the handle 66 is not detected by the front sensor 32 and the rear sensor 34. Therefore, erroneous detection of the handle 66 by the front sensor 32 and the rear sensor 34 is avoided, and thus temporary interruption of work is avoided, allowing work to proceed efficiently. Furthermore, when the worker uses the handle 66 to move the front anti-entrapment device 62 and the rear anti-entrapment device 64 up and down, the worker is detected by the front sensor 32 and the rear sensor 34. Therefore, the operator in the driver's seat 16 can reliably recognize through the warning lamp 50 that the front anti-entrapment device 62 and the rear anti-entrapment device 64 are being manually operated by the worker.

Furthermore, according to the rolling machine 1 of one embodiment of the present invention, at least one of the front entrapment prevention device 62 and the rear entrapment prevention device 64 is located within the detection range of the front sensor 32 and the rear sensor 34 when in the non-use position (upper position). Therefore, even when the rolling machine 1 is used for work with the front entrapment prevention device 62 and the rear entrapment prevention device 64 in the non-use position (i.e., when the entrapment prevention function is not being exercised), the operator in the driver's seat 16 can reliably recognize the operating status of the front entrapment prevention device 62 and the rear entrapment prevention device 64 through the warning lamp 50.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the rolling machine 1 according to the above embodiment, but includes all aspects included in the concept of the present invention and the scope of the claims. In addition, each configuration may be appropriately and selectively combined to achieve the above-mentioned problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment may be appropriately changed depending on the specific aspect of the present invention.

Figure 5 is a schematic diagram showing a modified example of the entrapment prevention device 60 according to one embodiment of the present invention. The entrapment prevention device 60a shown in Figure 5 differs from the entrapment prevention device 60 described above in the configuration of the rear link portion 65b. In the entrapment prevention device 60 described above, the rear link portion 64b has been described as being composed of a pair of metal members spaced apart in the vertical direction. However, in the entrapment prevention device 60a according to the modified example, the rear link portion 65b may be composed of a single metal member. This modified example can also be applied to the front link portion 62b in the same manner.

Figure 6 is a schematic diagram showing another modified example of the entrapment prevention device 60 according to one embodiment of the present invention. The entrapment prevention device 60b shown in Figure 6 differs from the entrapment prevention device 60 described above in that an electric drive mechanism is provided on the rear link portion 64b. In the entrapment prevention device 60 described above, the rear link portion 64b is described as being manually moved up and down. However, in the entrapment prevention device 60b according to another modified example, the rear link portion 64b may be configured to rotate in response to the expansion and contraction of, for example, a pneumatic cylinder or a hydraulic cylinder 68. In this case, the pneumatic cylinder or the hydraulic cylinder 68 may be driven by remote control by a worker or the like in the vicinity of the rolling machine 1, or may be driven by an operator in the driver's seat 16 operating an operation panel (not shown). This makes it possible to change the height of the front guard fence 62c and the rear guard fence 64c without approaching them, thereby improving the safety associated with the operation of the entrapment prevention device 60b. Note that this modified example can also be applied to the front link portion 62b in the same manner.

In the above embodiment, the rolling machine 1 has been described as having a single machine body 10 with front wheels 22 and rear wheels 24. However, the rolling machine 1 may be an articulated vibratory roller. In this case, the rolling machine 1 includes a front machine body and a rear machine body that are articulated and connected to each other via a connecting pin mechanism. The rolling machine 1 is configured such that the front machine body can be steered left and right (vehicle width direction) via the connecting pin mechanism by a steering mechanism (not shown) in response to steering wheel operation in the driver's seat 16, and thus the front wheels can be steered left and right.

In the above embodiment, it has been described that lighting the warning lamp 50 as an alarm device makes it possible to visually warn workers around the machine 10. However, the alarm device may be, for example, a speaker. In this case, a buzzer sound is output from the speaker based on the alarm signal from the ECU 40, making it possible to sound an alarm to the operator on board the machine 10 and workers around the machine 10. In addition, the alarm device may be, for example, a rotating light. In this case, based on the alarm signal from the ECU 40, the rotating light turns on a bulb while rotating a mirror, making it possible to visually warn workers around the machine 10.

In the above embodiment, the front sensor 32 is described as being attached to the front side of the main body 11. However, the front sensor 32 may be provided on the front wheel support 12. In this case, the operator in the driver's seat 16 operates the steering wheel to rotate the front wheel support 12 left and right, and the front sensor 32 changes direction accordingly, making it possible to reliably detect obstacles in the direction of rotation.

In the above embodiment, the front guard fence 62c is described as moving up and down by rotating via the front link portion 62b. However, the front guard fence 62c may move linearly in the vertical direction, for example, using a slide rail or the like. This point is also applicable to the rear guard fence 64c.

In the above embodiment, the front handle 66a is described as being configured by a portion of the front guard fence 62c that extends in the left-right direction. However, the front handle 66a may be configured by attaching a member separate from the front guard fence 62c to the front guard fence 62c. This point is also applicable to the rear lower handle 66c. In the above embodiment, the rear upper handle 66b is described as being configured by a separate member attached to the rear guard fence 64c. However, the rear upper handle 66b may be configured by a portion of the rear guard fence 64c that extends in the left-right direction. In addition, the front handle 66a, the rear upper handle 66b, and the rear lower handle 66c do not have to be provided in the center or approximately the center of the front guard fence 62c and the rear guard fence 64c, and may be provided, for example, on the left or right side of the front guard fence 62c and the rear guard fence 64c.

In the above embodiment, the detection range in the left-right direction by the front sensor 32 and the rear sensor 34 is described as being set to be equal to or approximately equal to the width length of the aircraft 10. However, the detection range of the front sensor 32 and the rear sensor 34 does not have to be fixed in the left-right direction, and the detection range may be changeable as appropriate.

Reference Signs List 1 rolling machine 10 machine body 22 front wheel 24 rear wheel 32 front sensor (first detection device)
34 Rear sensor (second detection device)
40 ECU (control unit)
50 Warning lamp (alarm device)
62 Front side entrapment prevention device (first entrapment prevention device)
64 Rear entrapment prevention device (second entrapment prevention device)
66 Handle

Claims (2)

The aircraft and
A front wheel and a rear wheel rotatably supported on the front and rear sides of the airframe, respectively;
a first detection device configured to detect an obstacle in front of the aircraft;
a second detection device configured to detect an obstacle behind the aircraft;
An alarm device;
a control device that controls the notification device based on obstacle information detected by the first detection device and the second detection device;
A first anti-entanglement device attached to the airframe and disposed in front of the front wheel;
A second entrapment prevention device attached to the machine body and disposed behind the rear wheel,
A rolling machine characterized in that at least one of the first entanglement prevention device and the second entanglement prevention device is attached to the body so as to be movable in the vertical direction between a use position and a non-use position, the use position being located outside the detection range of the first detection device and the second detection device, and the non-use position being located within the detection range of the first detection device and the second detection device . At least one of the first entanglement prevention device and the second entanglement prevention device is provided with a handle for an operator to move the device between the use position and the non-use position,
The compaction machine according to claim 1, characterized in that the handle is attached to the first entrapment prevention device and the second entrapment prevention device so that when the first entrapment prevention device and the second entrapment prevention device are in the use position, the handle is located outside the detection range of the first detection device and the second detection device, and when the operator operates the compaction machine to move it, the operator is located within the detection range of the first detection device and the second detection device.

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