Mobile protector and installation method of mobile protector

Abstract

To reduce labor and time for moving a protector.SOLUTION: A mobile protector according to a preferred embodiment of the present invention is a protector enabling construction of a road while ensuring passage of vehicles. The mobile protector has a frame portion including a first side wall portion and a second side wall portion that face each other and an upper wall portion connecting upper portions of the two side wall portions, a tire that is installed on a lower portion of the first side wall portion and can rotate on a ground surface, and a wheel that is installed on a lower portion of the second side wall portion and can travel on a rail. The mobile protector is moved by rotation of the tire and traveling of the wheel.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a protector that enables construction work on a road while ensuring the passage of vehicles. [Background technology]

[0002] For example, protectors are used in tunnel widening work that increases traffic volume after the construction of a tunnel. Vehicles can pass through inside the protector, which is installed to cover the road inside the tunnel. Meanwhile, construction work is carried out outside the protector using various types of work equipment (e.g., aerial work vehicles or excavators). The protector can also protect vehicles and roads from falling or flying objects that accompany construction work.

[0003] In addition to tunnel widening work, the protector is also used to protect vehicles in, for example, cutting and slope protection work.

[0004] As such protectors, fixed protectors have been used in the past, which are fixed and installed over the entire length of the tunnel that is the subject of construction. However, fixed protectors need to be installed over the entire length of the tunnel, which is not only time-consuming but also expensive. Therefore, in recent years, mobile protectors that can move within the tunnel have been used, as in the techniques of Patent Documents 1 to 5. With mobile protectors, there is no need to install the protector over the entire length of the tunnel, making it possible to shorten the length of the protector. Therefore, mobile protectors require less time and cost to install than fixed protectors. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 8-28175 [Patent Document 2] JP 2002-250044 A [Patent Document 3] JP 2003-278476 A [Patent Document 4] JP 2004-92072 A [Patent Document 5] JP 2006-57370 A Summary of the Invention [Problem to be solved by the invention]

[0006] Specifically, in the techniques of Patent Documents 1 to 5, wheels are provided on the bottom of the protector, and rails on which the wheels can move are installed on the road to be constructed. The wheels move on the rails, causing the protector itself to move. Therefore, in the techniques of Patent Documents 1 to 5, not only the installation work of installing the rails themselves, but also surveying work to determine the installation position of the rails before the rail installation work is required. As described above, the techniques of Patent Documents 1 to 5 have a problem in that it takes a lot of effort to move the mobile protector. In consideration of the above circumstances, the present invention aims to provide a mobile protector that reduces the effort required for movement. [Means for solving the problem]

[0007] In order to solve the above problems, a mobile protector according to a preferred embodiment of the present invention is a protector that enables road construction work while ensuring vehicle passage, and is equipped with a frame portion including a first side wall portion and a second side wall portion facing each other and an upper wall portion connecting the upper portions of the two side wall portions, a tire installed at the lower portion of the first side wall portion and capable of rotating on the ground, and a wheel installed at the lower portion of the second side wall portion and capable of running on a rail, and moves by the rotation of the tire and the running of the wheel. Effect of the Invention

[0008] According to the portable protector of the present invention, it is possible to reduce the effort required for transportation. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a configuration diagram (front view) illustrating the configuration of a movable protector. [Diagram 2] FIG. 2 is a configuration diagram (side view) illustrating the configuration of a movable protector. [Diagram 3] FIG. 2 is a configuration diagram (side view) illustrating the configuration of a movable protector. [Figure 4] FIG. 2 is a front view focusing on the tire and wheel. [Diagram 5] An enlarged view of the wheels and rails. [Figure 6] 11 is an explanatory diagram of the movable protector when it moves. FIG. [Figure 7] FIG. 13 is an explanatory diagram of when the mobile protector stops. [Figure 8] FIG. 13 is a configuration diagram of a protector according to a comparative example. [Figure 9] 10A and 10B are explanatory diagrams of a method for installing a movable protector. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] 12 is a cross-sectional view taken along line aa in FIG. 11. [Figure 13] 13 is a cross-sectional view taken along line aa in FIG. 12. [Figure 14] FIG. 11 is a side view of a protector unit according to another embodiment. [Figure 15] 15 is a cross-sectional view taken along line aa in FIG. 14. [Figure 16] 15 is a cross-sectional view taken along the line bb in FIG. 14. [Figure 17] 15 is a cross-sectional view taken along line cc in FIG. 14. [Figure 18] 16 is a cross-sectional view taken along line aa in FIG. 15. [Figure 19] FIG. [Figure 20] FIG. 4 is a side view of the cover member during installation. [Figure 21] FIG. 11 is a side view of the cover member during movement. [Figure 22]13A and 13B are a side view and a front view of a movable protector according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] <Mobile Protector> 1 is a front view (view from the entrance side of tunnel T) of a mobile protector 100 according to this embodiment. In the present invention, a protector is a device that is installed so as to cover a road in an existing tunnel, and enables construction of the tunnel (e.g., widening construction) while ensuring the passage of vehicles. The mobile protector 100 of the present invention is a protector that can move within tunnel T.

[0011] In the following description, the short side direction (width direction) of the mobile protector 100 is referred to as the x direction, and the long side direction (length direction) of the mobile protector 100 is referred to as the y direction. The direction perpendicular to a plane including the x and y directions is referred to as the z direction. That is, the z direction is the up-down direction (height direction) of the mobile protector 100. In addition, in a state where the mobile protector 100 is installed in the tunnel T, the x direction is approximately parallel to the width direction of the tunnel T (road), the y direction is approximately parallel to the length direction of the tunnel T (road), and the z direction is approximately parallel to the height direction of the tunnel T. In addition, the positive side of the z direction is an example of the "upper side", and the negative side of the z direction is an example of the "lower side".

[0012] 2 and 3 are side views of the mobile protector 100. Fig. 2 is a side view seen from the negative side of the x direction, and Fig. 3 is a side view seen from the positive side of the x direction. As illustrated in Figs. 1 to 3, the mobile protector 100 includes a frame portion 10, a plurality of tires 20A, a plurality of wheels 20B, and a plurality of load receiving devices 40.

[0013] 1, the frame portion 10 is a member that covers a road and is formed in a substantially gate-like shape when viewed from the front. Specifically, the frame portion 10 includes a first side wall portion 11A, a second side wall portion 11B, and an upper wall portion 13.

[0014] The first side wall portion 11A and the second side wall portion 11B are portions extending along the z direction in a front view, and are disposed so as to face each other in the x direction. FIG. 1 illustrates a case in which the second side wall portion 11B is located on the positive side of the x direction, and the first side wall portion 11A is located on the negative side of the x direction. A tire 20A is disposed on the first side wall portion 11A, and a wheel 20B is disposed on the second side wall portion 11B. In the following description, when it is not necessary to distinguish between the first side wall portion 11A and the second side wall portion 11B, they are simply referred to as "side wall portion 11."

[0015] As illustrated in FIGS. 2 and 3 , the side wall portion 11 includes, for example, a lower beam 111 , an upper beam 112 , a support column 113 , and a brace 114 .

[0016] The lower beam 111 is an elongated portion along the y direction on the negative side (lower side) of the z direction in a side view. The lower beam 111 according to this embodiment includes one or more first portions 91 and one or more second portions 92. FIG. 2 illustrates a case in which the lower beam 111 is composed of two first portions 91 and one second portion 92. The first portions 91 and the second portions 92 are arranged alternately. Specifically, the second portion 92 is located between one first portion 91 and the other first portion 91 along the y direction.

[0017] The second portion 92 is located on the negative side in the z direction (i.e., lower side) than the first portion 91. That is, the second portion 92 is located closer to the ground W (surface of the road) than the first portion 91. In other words, the first portion 91 is located closer to the upper girder 112 than the second portion 92. The length (size in the y direction) of the first portion 91 and the length of the second portion 92 are arbitrary, but FIG. 2 illustrates a case where the second portion 92 is longer than the first portion 91.

[0018] The upper beam 112 is an elongated portion that extends along the y direction on the positive side (upper side) of the z direction. In this embodiment, the upper beam 112 is formed from a single member.

[0019] The pillars 113 are elongated portions extending along the z direction, and connect the lower beam 111 and the upper beam 112. In this embodiment, a plurality of pillars 113 (five in FIG. 2) are provided at predetermined intervals. In FIG. 2, the pillars 113 are provided at positions corresponding to both ends of each first portion 91 (ends on the negative and positive sides in the y direction), both ends of the second portion 92 (ends on the negative and positive sides in the y direction), and the center of the second portion 92. The number of pillars 113 is not limited to the example shown in FIG. 2.

[0020] The diagonal brace 114 is a member that connects two adjacent columns 113. The two diagonal braces 114 connect two adjacent columns 113 along a diagonal line. Note that, in the above description, the side wall portion 11 is formed by the lower beam 111, the upper beam 112, the columns 113, and the diagonal brace 114, but the specific configuration of the side wall portion 11 is not limited to the above example.

[0021] 1, the upper wall portion 13 is a portion that extends along the x direction in a front view, and connects the upper portions of the two side wall portions 11. In the present invention, the upper portion of the side wall portion 11 refers to a portion that is located at the end portion on the positive side in the z direction of the side wall portion 11. For example, this corresponds to the end portion on the positive side (upper side) in the z direction of the upper beam 112 or the support column 113, or the upper portion of the side wall portion 11.

[0022] 2, the upper wall portion 13 of this embodiment includes a plurality of cross beams 131 and a base 132. Each cross beam 131 is an elongated member extending along the x direction, and is formed from an upper beam 112 of one side wall portion 11 to an upper beam 112 of the other side wall portion 11. Each cross beam 131 is installed at a predetermined interval along the y direction. The base 132 is a plate-shaped member installed across the plurality of cross beams 131.

[0023] The mobile protector 100 according to this embodiment can also be used as a work platform on which construction equipment, materials, etc. can be placed using the upper wall portion 13. Therefore, there is also an advantage that there is no need to install a work platform separate from the mobile protector 100.

[0024] 1 and 2, the tire 20A installed on the first side wall portion 11A can rotate while in contact with the ground W (surface of the road). For example, a unique tire (puncture-free tire) capable of withstanding the weight of the mobile protector 100 is preferably used as the tire 20A. The tire 20A according to the present invention can run without requiring a rail R.

[0025] The tire 20A of this embodiment is installed in the first portion 91 of the first sidewall portion 11A. Specifically, the tire 20A is installed on the bottom surface of the first portion 91 of the first sidewall portion 11A. Note that FIG. 2 illustrates a configuration in which one tire 20A is installed for each first portion 91. However, the number of tires 20A installed in the first portion 91 is arbitrary. Also, as shown in FIG. 1, a set of two tires running side by side may be used as the tire 20A. The number of tires 20A and the number of wheels 20B in the mobile protector 100 may differ from the positions at which they are installed in each sidewall portion 11.

[0026] On the other hand, as illustrated in FIG. 1 and FIG. 3, the wheels 20B installed on the second side wall portion 11B can run on the rail R. The wheels 20B run by rotating while in contact with the rail R. The shapes of the rail R and the wheels 20B will be described later. For example, the tires 20A and the wheels 20B are electrically driven by a motor that rotates when electricity is supplied. The tires 20A and the wheels 20B rotate along the y direction. That is, the rotation axes of the tires 20A and the wheels 20B are axes parallel to the x direction. Note that the motor is installed, for example, near the tires 20A (wheels 20B) for each of the multiple tires 20A (wheels 20B). However, it is not essential to provide a motor for each tire 20A (wheel 20B). For example, a motor may be provided for one of the two tires 20A (wheels 20B) installed on each side wall portion 11.

[0027] Also, a configuration in which the rotation speed of each motor is variably set (i.e., an inverter-type motor equipped with an inverter) may be adopted. In a configuration equipped with an inverter-type motor, the speed can be finely adjusted when starting and stopping, so that sudden starting and stopping can be suppressed, and therefore safety is ensured. Also, in the above configuration, for example, the rotation speed of the motors installed on one side wall portion 11 and the other side wall portion 11 may be made different. Note that the mobile protector 100 may be provided with brakes for stopping the rotation of the tires 20A and the wheels 20B.

[0028] The bottom surface of the second portion 92 of the first sidewall portion 11A is located above the lower end of the tire 20A, and the bottom surface of the second portion 92 of the second sidewall portion 11B is located above the lower end of the wheel 20B.

[0029] Fig. 4 is a front view of the tire 20A and the wheel 20B. As illustrated in Fig. 4, the tire 20A is installed on the first portion 91 of the first sidewall portion 11A (lower beam 111) by a retaining mechanism 30A, and the wheel 20B is installed on the first portion 91 of the second sidewall portion 11B (lower beam 111) by a retaining mechanism 30B. When there is no need to distinguish between the retaining mechanisms 30A and 30B, they will be simply referred to as the retaining mechanism 30.

[0030] Each holding mechanism 30 includes a bearing portion 31, a support member 32, and a holding member 33. The bearing portion 31 is a member that holds the rotation axis O of the tire 20A (or the wheel 20B) so as not to impede rotation. For example, the bearing portion 31 holds the rotation axis O from both sides (positive and negative sides in the x direction) of the tire 20A (or the wheel 20B) between them.

[0031] The support member 32 is a member for supporting the bearing portion 31. For example, the support member 32 is formed so as to connect a portion of the bearing portion 31 on the positive side in the x direction and a portion of the bearing portion 31 on the negative side in the x direction, passing above the tire 20A (or the wheel 20B). Note that a motor for driving the tire 20A (or the wheel 20B) may be installed in the support member 32, for example. However, the location where the motor is installed is not limited to the above example. For example, the motor may be mounted in the lower beam 111 (for example, the first portion 91).

[0032] The holding member 33 is an elongated member along the z direction. One end (end on the negative side in the z direction) of the holding member 33 is connected to the support member 32. For example, one end of the holding member 33 is connected to a portion of the support member 32 located above the tire 20A (or the wheel 20B). On the other hand, the other end (end on the positive side in the z direction) of the holding member 33 is connected to the first part 91. For example, the other end of the holding member 33 is connected to the first part 91 in a state where it is inserted into a through hole (through hole along the z direction) formed in the first part 91. Note that, although FIG. 4 illustrates a case where the holding mechanism 30A and the holding mechanism 30B have the same configuration, the holding mechanism 30A and the holding mechanism 30B may have different configurations. As long as the tire 20A and the wheel 20B can be installed on the first part 91, the configuration of each holding mechanism 30 is arbitrary.

[0033] As illustrated in Fig. 4, the first portion 91 of the first side wall portion 11A and the first portion 91 of the second side wall portion 11B may have bottom surfaces at different positions in the z direction. Fig. 4 illustrates a configuration in which the bottom surface of the first portion 91 of the first side wall portion 11A is located lower (on the negative side in the z direction) than the bottom surface of the first portion 91 of the second side wall portion 11B. Also, as illustrated in Fig. 4, an openable cover S may be attached to the outer side of the tire 20A and the wheel 20B (the side opposite to the internal space of the frame portion 10) to prevent excavated soil, water, and the like from getting on them.

[0034] FIG. 5 is an enlarged view of the wheel 20B and the rail R in FIG. 4. As illustrated in FIG. 5, the outer peripheral surface of the wheel 20B according to this embodiment includes a first region 201, a second region 202, and a third region 203 in the width direction of the wheel 20B. The first region 201 is located on one periphery in the width direction (positive side in the x direction), and the second region 202 is located on the other periphery in the width direction (negative side in the x direction). The third region 203 is located between the first region 201 and the second region 202. The first region 201 and the second region 202 are parts that protrude from the third region 203. That is, the outer diameter in the first region 201 and the outer diameter in the second region 202 are larger than the outer diameter in the third region 203. The first region 201, the second region 202, and the third region 203 are formed over the entire circumference of the wheel 20B. As can be understood from the above description, the shape of the wheel 20B is a so-called double-brim shape. By making the wheel 20B a double-brim shape, even if one side is the tire 20A, the mobile protector 100 is less likely to derail from the rail R. Regarding the height of the brim, a configuration that is higher than usual may be adopted in consideration of the case where the mobile protector 100 is subjected to pressure from the tire 20A side when moving in a curved line.

[0035] The rail R on which the wheel 20B runs is composed of, for example, a first rail portion R1 and a second rail portion R2. The first rail portion R1 is a portion that abuts against the ground W. The first rail portion R1 includes a first member r1 and a second member r2. The first member r1 is a plate-shaped portion that is aligned along the x direction in a front view. The width (size in the x direction) of the first member r1 is larger than the width (size in the x direction) of the wheel 20B. The second member r2 is a portion that protrudes from the first member r1 toward the positive side in the z direction. The second member r2 is formed at each of the positive end and negative end of the first member r1 in the x direction. That is, the first rail portion R1 is shaped (concave) with a central portion recessed in a front view.

[0036] The second rail portion R2 is a portion with which the wheel 20B directly abuts. The second rail portion R2 is installed between two second members r2 on the surface of the first rail portion R1. The second rail portion R2 includes a third member r3, a fourth member r4, and a fifth member r5. The third member r3 is a portion along the z direction. The fourth member r4 and the fifth member r5 are portions along the x direction. The fourth member r4 is connected to the end of the third member r3 on the negative side in the z direction. The second rail portion R2 is installed on the first rail portion R1 so that the fourth member r4 abuts on the surface of the first rail portion R1 (first member r1).

[0037] The fifth member r5 is connected to an end of the third member r3 on the positive side in the z direction. The wheel 20B is placed on the rail R so that the fifth member r5 comes into contact with the third region 203 of the wheel 20B. The wheel 20B rotates with the third region 203 in contact with the rail R, thereby enabling the wheel 20B to run on the rail R.

[0038] 4, the tire 20A and the rail R are installed so that the lower end Q1 (part that abuts on the ground W) of the tire 20A and the lower end Q2 (part that contacts the ground W) of the first rail portion R1 of the rail R are at the same height (position in the z direction). Therefore, the mobile protector 100 of this embodiment can move by the tire 20A rotating on the ground W and the wheel 20B running on the rail R installed on the ground W.

[0039] Here, for example, it is assumed that the road inside the tunnel T is divided into a plurality of sections (first section, second section, third section, ...) along the axial direction of the tunnel T, and construction is carried out in sequence. That is, when construction of the first section is completed, construction moves to the second section located next to the first section. When construction of the first section is carried out, the mobile protector 100 is stopped in the first section. Then, when construction of the first section is completed, the mobile protector 100 is moved to the second section. Then, after moving to the second section, it is stopped, and construction of the second section begins. As described above, the movement and stopping of the mobile protector 100 is repeated until construction of all sections is completed.

[0040] The load receiving device 40 is a device for dispersing the load applied to the tire 20A and the wheel 20B while the mobile protector 100 is stopped. The load applied to the tire 20A and the wheel 20B is, for example, the weight of the mobile protector 100 and the weight of materials and equipment placed on the mobile protector 100.

[0041] As illustrated in FIG. 2 and FIG. 3, the load receiving device 40 is installed at the lower part of the side wall part 11. A plurality of load receiving devices 40 are installed at each side wall part 11. At the first side wall part 11A, the load receiving device 40 is installed at a position not in contact with the tire 20A. At the second side wall part 11B, the load receiving device 40 is installed at a position not in contact with the wheel 20B and the rail R. The lower part of the side wall part 11 is a part located at the end part on the negative side in the z direction in the side wall part 11. For example, the end part on the negative side (lower side) in the z direction of the support 113 or the lower beam 111 corresponds to the lower part of the side wall part 11. In this embodiment, a configuration in which the load receiving device 40 is installed at the end part on the negative side in the z direction of the support 113 is illustrated. Specifically, the load receiving device 40 is installed on the side surface of the support 113 (for example, the surface opposite to the internal space of the frame part 10).

[0042] Specifically, the load receiving device 40 is in a state separated from the ground W (hereinafter referred to as the "separated state") and a state in contact with the ground W (hereinafter referred to as the "contact state"). Fig. 6 is a side view of the mobile protector 100 in which the load receiving device 40 is in the separated state, and Fig. 7 is a side view of the mobile protector 100 in which the load receiving device 40 is in the contact state. Note that Figs. 6 and 7 show side views of the first side wall portion 11A on which the tire 20A is installed, but the second side wall portion 11B on which the wheel 20B is installed has the same configuration as Figs. 6 and 7 except that the tire 20A is replaced with the wheel 20B.

[0043] When the mobile protector 100 is moved, the load receiving device 40 is put into a separated state as illustrated in Fig. 6. That is, the load receiving device 40 is in a non-functioning state. Therefore, the tire 20A rotates on the ground W, and the wheel 20B is in a state capable of running on the rail R. That is, the mobile protector 100 is in a movable state.

[0044] On the other hand, when the mobile protector 100 is stopped, the load receiving device 40 is in an abutting state as illustrated in FIG. 7. Then, the mobile protector 100 is supported by the load receiving device 40 abutting the ground W. That is, the load receiving device 40 is in a functioning state. Therefore, a reaction force against the load is generated in the load receiving device 40. In a state in which the tire 20A abuts the ground W and the wheel 20B abuts the rail R, the load receiving device 40 also abuts the ground W. As a result, the load applied to the tire 20A and the wheel 20B is reduced by the load receiving device 40. In other words, the mobile protector 100 is in a fixed state by the load receiving device 40 abutting the ground W. In addition, in the abutting state, the load receiving device 40 on the second side wall portion 11B abuts the ground W on the opposite side of the internal space of the frame portion 10 as viewed from the rail R so as not to come into contact with the rail R.

[0045] The load receiving device 40 of this embodiment is, for example, a device that can expand and contract in the z direction. That is, the length of the load receiving device 40 in the z direction is variable. The load receiving device 40 contracts when in a separated state (i.e., when the mobile protector 100 is moved), and extends when in an abutting state (i.e., when the mobile protector 100 is stopped). The load receiving device 40 is capable of maintaining its length in the z direction for both the separated state and the abutting state. The specific configuration of the load receiving device 40 is arbitrary as long as it is a device that can maintain its length in the z direction in the separated state and the abutting state.

[0046] As can be understood from the above description, when the mobile protector 100 is stopped, the load receiving device 40 is brought into contact with the tire 20A and the wheel 20B, thereby making it possible to reduce the load applied thereto.

[0047] The position where the load receiving device 40 is installed is not limited to the above example. The position where the load receiving device 40 is installed is arbitrary as long as the tire 20A does not come into contact with the wheel 20B and the rail R. For example, the load receiving device 40 may be installed on either or both of the first portion 91 and the second portion 92 of the lower beam 111. Furthermore, the positions and the number of the load receiving devices 40 installed on the first side wall portion 11A and the second side wall portion 11B may be different.

[0048] FIG. 8 illustrates a mobile protector according to a comparative example to be compared with the present invention. As illustrated in FIG. 8, the comparative example is configured such that wheels 20B that run on rails are provided on both side walls of the mobile protector. That is, in the comparative example, two rails are required when moving the mobile protector. Therefore, in the comparative example, not only the installation work of installing the rails themselves, but also the surveying work for determining the installation position of the rails before the installation work of the rails is required for the two rails. In contrast, in the mobile protector 100 of this embodiment, the wheels 20B are installed on one of the two side walls 11, but the tire 20A that does not require a rail is installed on the other. That is, according to this embodiment, the installation work of installing the rails themselves and the surveying work for determining the installation position of the rails before the installation work of the rails need only be performed for one rail. Thus, compared to the comparative example, the effort required to move the mobile protector 100 is reduced.

[0049] Here, a configuration is assumed in which tires are installed on both the first side wall portion 11A and the second side wall portion 11B. In the above configuration, the effort of installing rails is not required, but since the mobile protector does not move along the rails, it is necessary to guide the mobile protector to the destination while checking its current location. On the other hand, according to the mobile protector 100 of this embodiment, the wheel 20B runs along the rails, and the tire 20A moves so as to follow the running of the wheel. In other words, since the mobile protector 100 moves along the rails, there is an advantage in that the effort of guiding the mobile protector 100 is not required.

[0050] In the present invention, the load receiving device 40 is not essential. For example, when the load on the tire 20A and the wheel 20B is small, or when the tire 20A and the wheel 20B (rail R) are made of a material capable of withstanding the load, the load receiving device 40 does not need to be provided.

[0051] <How to install the mobile protector> 9 is an explanatory diagram for explaining a method for installing a mobile protector on a road to be repaired (hereinafter referred to as an "installation method"). In this embodiment, a road inside a tunnel is taken as an example of a road to be repaired, and an installation method for installing the mobile protector at a position on the road near the entrance of the tunnel is shown.

[0052] First, the mobile protector is assembled in a yard outside the tunnel (i.e., outside the road that is the subject of construction). At this time, full access is permitted. After the mobile protector is assembled in the yard, it is moved to the vicinity of the tunnel entrance in the following steps (1) to (3).

[0053] (1) Lay rails for the wheels installed on the second side wall portion 11B to run on. The rails are laid from the yard to the road up to near the entrance of the tunnel. The rails are laid along the road edge to avoid laying them near the center of the road. This makes it possible to lay the rails for one-way alternating traffic. (2) With the entire line closed, the mobile protector is moved from the yard to the vicinity of the mine entrance. With the wheels placed on the rails and the tires in contact with the ground, the wheels and tires are rotated to move the mobile protector to the vicinity of the mine entrance. (3) Traffic will be changed to one-way alternating traffic and the entire road closure will be lifted.

[0054] Here, a case where a mobile protector (having wheels on both of the two side wall parts) according to a comparative example is installed near the entrance of a tunnel will be described. First, after assembly in a yard outside the tunnel, the road is completely closed to traffic and two rails are laid from the yard to the vicinity of the entrance. When laying two rails, a complete road closure is necessary. After the mobile protector is moved to the vicinity of the entrance, the complete road closure cannot be lifted until the rails laid from the yard to the vicinity of the entrance are removed. That is, in the comparative example, not only is it necessary to lay and remove rails R for each of the two rails in order to install the mobile protector near the entrance, but there is also a problem that the complete road closure is long.

[0055] In contrast, the mobile protector of the present invention only requires installation and removal of one rail, and allows one-way traffic to pass alternately without a full road closure when laying the rail. In other words, it reduces the effort required to move the mobile protector to the vicinity of the tunnel entrance, and also shortens the period of full road closure.

[0056] <Protector unit> A protector unit U in which a plurality of mobile protectors 100 are connected to each other will be described. FIG. 10 is a top view of the protector unit U according to this embodiment when viewed from above. FIG. 10 illustrates a protector unit U in which two adjacent mobile protectors 100a and 100b are connected to each other. In this embodiment, a case in which the mobile protector 100b leads in the traveling direction and the mobile protector 100a follows is illustrated. However, a configuration in which the mobile protector 100a leads and the mobile protector 100b follows may also be used.

[0057] The mobile protector 100a and the mobile protector 100b are connected so that the spaces formed by the respective frame portions 10 are linked. The protector unit U is bendable around a portion N where the mobile protector 100a and the mobile protector 100b are connected (hereinafter referred to as the "connection portion"). The protector unit U can move in a desired direction in the bent state. Therefore, as illustrated in FIG. 10, the protector unit U can move along the tunnel T, the linear shape of which is curved.

[0058] FIG. 11 is a side view of the connection portion N (a side view seen from the outside of the mobile protector 100). Note that FIG. 11 illustrates the internal structure of the support 113a and the support 113b for convenience. FIG. 12 is a cross-sectional view of the line aa in FIG. 11. FIG. 13 is a cross-sectional view of the line aa in FIG. 12. Note that FIG. 12 illustrates the angle θ formed by the mobile protector 100a and the mobile protector 100b in a plan view. Note that when the protector unit U is in a straight line, the angle θ is 180 degrees, and when the protector unit U is bent, the angle θ is an angle other than 180 degrees. Note that FIG. 12 illustrates an example in which the protector unit U is bent, but FIG. 13 illustrates a cross-sectional view in which the angle θ is 180 degrees for convenience.

[0059] The connection mechanism 50 of this embodiment includes a turnbuckle 51, a pin member 52, and a pin guide 53. The turnbuckle 51 is a member that connects the outer surface of the lower beam 111a of the mobile protector 100a and the outer surface of the lower beam 111b of the mobile protector 100b. The outer surface of the lower beam 111 is the surface opposite to the internal space of the frame portion 10. An elongated turnbuckle 51 that extends across both the lower beam 111a and the lower beam 111b is used.

[0060] As illustrated in FIG. 11 to FIG. 13, the lower beam 111a is connected to one end of the turnbuckle 51 so as to be rotatable around a first shaft portion 511 along the z direction. Similarly, the lower beam 111b is connected to the other end of the turnbuckle 51 so as to be rotatable around a second shaft portion 512 along the z direction. That is, the mobile protector 100a and the mobile protector 100b are mutually rotatable around the connection mechanism 50. As a result, the angle θ changes, and the protector unit U can be in a bent state. The turnbuckle 51 can be changed to a desired length. The interval between the support pillar 113a and the support pillar 113b can be adjusted according to the length of the turnbuckle 51.

[0061] The position where the turnbuckle 51 is installed is not limited to the lower beam 111. For example, the turnbuckle 51 may be provided to connect the support pillars 113, the upper beams 112, or the cross beams 131 of two movable protectors 100.

[0062] The pin member 52 and the pin guide 53 are members for changing the angle θ. The angle θ can be changed within a predetermined range (hereinafter referred to as the "bending range"). The larger the bending range, the more the angle θ can be away from 180 degrees. In other words, one of the mobile protector 100a and the mobile protector 100b can bend greatly relative to the other.

[0063] The value of the bending range of the connection mechanism 50 is obtained, for example, from the angle of the front and rear rails R at the connection part of the multiple rails R laid according to the horizontal alignment of the tunnel. The type of rail R used is usually a straight rail or a curved rail, but a straight rail is mainly used. However, in the case of a sharp curve, a short straight rail or a curved rail may be used. Regarding the bending range, the angle formed by the leading mobile protector 100a and the trailing mobile protector 100b when the mobile protector 100 is placed on the laid rail R is obtained based on the minimum radius of the plan line of the tunnel. In this case, the value of the bending range in which the protector unit U can bend is determined taking into consideration the safety factor. Then, a connection mechanism 50 capable of satisfying the value of the bending range is adopted.

[0064] The pin members 52 are pin-shaped members. For example, as illustrated in Fig. 11, two pin members 52 are provided to connect a support 113a located at an end on the positive side in the y direction of the multiple support columns 113 of the mobile protector 100a and a support 113b located at an end on the negative side in the y direction of the multiple support columns 113 of the mobile protector 100b. However, the positions and number of the pin members 52 are arbitrary. Note that the pin members 52 cannot actually be seen from the outside of the protector unit U, but are illustrated in Fig. 11 for convenience.

[0065] The pin guide 53 is a member provided for each pin member 52, and has a space (hereinafter referred to as a "guide space") for guiding the movement of the pin member 52. As illustrated in FIG. 12, one end 521 of the pin member 52 is fixed to the support 113b at a position facing the support 113a. For example, one end 521 of the pin member 52 is fixed to the support 113b in a state where it is inserted into a through hole provided in a web portion 330b of the support 113b. A bracket for supporting the pin member 52 is provided on the support 113b. The angle θ can be said to be the angle formed between the pin member 52 and the support 113a in a plan view.

[0066] For example, the pin member 52 is fixed to the support 113b via a fixing member inserted into a through hole I (for example, a through hole along the x direction) formed in the pin member 52. In this embodiment, the axial position of the pin member 52 fixed to the support 113b is variable. As illustrated in FIG. 15, for example, the through holes I are formed at a plurality of different positions in the axial direction (y direction) of the pin member 52. Therefore, it is possible to change the axial position of the pin member 52 fixed to the support 113b depending on the position of the plurality of through holes I into which the fixing member is inserted.

[0067] On the other hand, the pin guide 53 is installed on the support 113a at a position corresponding to the other end 522 of the pin member 52 fixed to the support 113b. Specifically, the pin guide 53 is provided on the surface of the web portion 330a of the support 113a that faces the movable protector 100b. The other end 522 of the pin member 52 is inserted into the guide space of the pin guide 53 in a state in which it can move in a horizontal plane. Specifically, the other end 522 of the pin member 52 can slide in the horizontal plane in the guide space. The other end 522 slides in the horizontal plane in the guide space, causing the protector unit U to bend around the connection part N.

[0068] The bending range can change depending on the amount by which the other end 522 of the pin member 52 is inserted into the guide space (hereinafter referred to as the "insertion amount"). Specifically, the greater the insertion amount (the deeper the other end 522 of the pin member 52 is inserted into the guide space), the smaller the bending range. On the other hand, the smaller the insertion amount (the shallower the other end 522 of the pin member 52 is inserted into the guide space), the larger the bending range. Note that when the insertion amount is large, the other end 522 slides at a position away from the entrance of the guide space, and when the insertion amount is small, the other end 522 slides near the entrance of the guide space.

[0069] The insertion amount can be changed according to the length of the turnbuckle 51. The longer the turnbuckle 51 (i.e., the greater the distance between the movable protector 100a and the movable protector 100b), the smaller the insertion amount. That is, the bending range becomes larger. On the other hand, the shorter the turnbuckle 51 (i.e., the smaller the distance between the movable protector 100a and the movable protector 100b), the larger the insertion amount. That is, the bending range becomes smaller.

[0070] The insertion amount can be changed according to the axial position of the pin member 52 fixed to the support 113b. Specifically, the closer the pin member 52 is fixed to the support 113b at a position closer to the one end 521, the greater the insertion amount. That is, the bending range becomes smaller. On the other hand, the farther the pin member 52 is fixed to the support 113b at a position farther from the one end 521, the smaller the insertion amount. That is, the bending range becomes larger. As described above, the axial position of the pin member 52 fixed to the support 113b can be changed according to the through hole I into which the fixing member is inserted among the multiple through holes I. The length of the turnbuckle 51 and the position at which the one end 521 side of the pin member 52 is fixed can be changed appropriately by the operator.

[0071] The positions of the mobile protector 100a and the mobile protector 100b are adjusted in the following procedure. (1) The height of the movable protector 100a and the height of the movable protector 100b are adjusted to be the same by driving and fixing the pin member 52 into the through hole provided in the web portion 330b of the movable protector 100b from the opposite side to the movable protector 100a. Specifically, The pin member 52 is driven into the through hole of the web portion 330b so that the other end 522 is inserted into the guide space of the pin guide 53. (2) Insert an adjusted liner material under the adjusted movable protector 100 (between the lower beam 111 and the ground). (3) Attach the connecting turnbuckles 51 to both movable protectors 100 and adjust their positions.

[0072] Furthermore, when the connection between the movable protector 100a and the movable protector 100b is to be released, the fixing member inserted into the through hole I is pulled out and the pin member 52 is removed, as necessary.

[0073] In this embodiment, a configuration is exemplified in which pin member 52 is fixed to support pillar 113b and pin guide 53 is provided on support pillar 113a, but if protector unit U can move in the desired direction in a bent state, pin member 52 may be fixed to support pillar 113a and pin guide 53 may be provided on support pillar 113b.

[0074] Other configurations of the connection mechanism 50 will be exemplified below.

[0075] Fig. 14 is a side view of the protector unit U corresponding to Fig. 11, Fig. 15 is a cross-sectional view taken along line aa in Fig. 14, Fig. 16 is a cross-sectional view taken along line bb in Fig. 14, and Fig. 17 is a cross-sectional view taken along line cc in Fig. 14. Fig. 18 is a cross-sectional view taken along line aa in Fig. 15. Note that Fig. 15 illustrates an example in which the protector unit U is bent, but Fig. 18 illustrates a cross-sectional view in which the angle θ is 180 degrees for the sake of convenience.

[0076] 14 to 18, a connection mechanism 50 is illustrated which is provided with a punch pin 57 instead of the above-mentioned pin member 52, and which omits the pin guide 53. The punch pin 57 is a pin-shaped member.

[0077] 15, 16 and 18, a circular pin hole Q2 through which the support 113b is inserted is provided. Specifically, the pin hole Q2 is provided so as to penetrate both the reinforcing backing plate 592 attached to the web portion 330b of the support 113b and the web portion 330b. The punch pin 57 is driven into the pin hole Q2 from the side opposite to the movable protector 100a and fixed.

[0078] 15, 17, and 18, the support 113a is provided with an oval (horizontally long) pin hole Q1 through which the other end 571 of the punching pin 57 driven into the pin hole Q2 is inserted. Specifically, the pin hole Q1 is provided so as to penetrate both the reinforcing backing plate 591 attached to the web portion 330a of the support 113a and the web portion 330a. The other end 571 of the punching pin 57 is movable within the horizontal plane while inserted into the pin hole Q1.

[0079] In other words, the punch pin 57 and the pin hole Q1 are members for setting the bending range within a desired range. The larger the bending range, the more the angle θ can be away from 180 degrees. In other words, one of the mobile protector 100a and the mobile protector 100b can be largely bent relative to the other.

[0080] The pin hole Q1 serves as a guide space for guiding the movement of the punching pin 57, and the punching pin 57 is inserted into the pin hole Q1 so as to be movable in a horizontal plane. Specifically, the other end 571 of the punching pin 57 can slide in the horizontal plane in the guide space. When the other end 571 slides in the horizontal plane in the guide space, the protector unit U bends around the connection part N.

[0081] As can be understood from the above explanation, while the above-mentioned pin member 52 is fixed to the support 113b via a rod-shaped fixing member inserted into the through hole I, the punching pin 57 is fixed to the support 113b by being driven into the pin hole Q2.

[0082] The positions of the mobile protector 100a and the mobile protector 100b are adjusted in the following procedure. (1) The height of the mobile protector 100a is adjusted to be the same as the height of the mobile protector 100b by driving the punch pin 57 into the pin hole Q2 of the support 113b from the opposite side to the mobile protector 100a. Specifically, the punch pin 57 is driven into the pin hole Q2 so that the other end 571 is inserted into the pin hole Q1 of the mobile protector 100a. (2) Insert an adjusted liner material under the adjusted movable protector 100 (between the lower beam 111 and the ground). (3) Attach the connecting turnbuckles 51 to both movable protectors 100 and adjust their positions.

[0083] Furthermore, when the connection between the mobile protector 100a and the mobile protector 100b is to be released, the driven punching pin 57 is punched out from the mobile protector 100a side as necessary to remove the mobile protector 100a.

[0084] In addition, in Figures 15 to 18, a configuration is shown in which punching pin 57 is fixed to support pillar 113b and a guide space is provided in support pillar 113a, but if protector unit U can move in the desired direction in a bent state, punching pin 57 may be fixed to support pillar 113a and a guide space may be provided in support pillar 113b.

[0085] In the above description, the connection mechanism 50 that connects the mobile protector 100a and the mobile protector 100b so that the protector unit U can be bent has been exemplified, but the specific configuration of the connection mechanism 50 is not limited to the above example. The specific configuration of the connection mechanism 50 is arbitrary as long as it is possible to connect the mobile protector 100a and the mobile protector 100b so that they can move forward.

[0086] However, from the viewpoint of enabling the protector unit U to move in a curved shape, a configuration in which the movable protector 100a and the movable protector 100b are connected so that the protector unit U can be bent is preferable.

[0087] 19 is a side view of the lid member 70 installed above the connection part N in the protector unit U. The lid member 70 is an openable and closable plate-like member for preventing (stopping) water from entering the inside of the mobile protector 100. The lid member 70 is formed to be large enough to close the gap between the mobile protector 100a and the mobile protector 100b. For example, the lid member 70 is installed on the stand 132 of the mobile protector 100a using a hinge 71. The lid member 70 can be opened and closed by rotating around the hinge 71.

[0088] As illustrated in Fig. 20, during construction, the cover member 70 is closed so that the gap between the mobile protector 100a and the mobile protector 100b is not exposed. Therefore, for example, the cover member 70 can prevent water falling from inside the tunnel from entering the inside of the mobile protector 100. On the other hand, as illustrated in Fig. 21, during movement of the protector unit U, the cover member 70 is opened so that the movement of the mobile protector 100a and the mobile protector 100b is not hindered.

[0089] In order to improve the watertight performance, two cylindrical rubber hoses 73 and an inner cover member 75 located between the two may be provided between the stand 132 of the mobile protector 100a and the stand 132 of the mobile protector 100b. One cylindrical rubber hose 73 is provided along the edge of the stand 132 of the mobile protector 100a, and the other cylindrical rubber hose 73 is provided along the edge of the stand 132 of the mobile protector 100b.

[0090] As can be understood from the above explanation, the protector unit U of this embodiment is capable of being bent around the connection portion N, and is therefore capable of proceeding along the interior of the tunnel T even if the linear shape of the tunnel T is curved.

[0091] As shown in FIG. 12, a cover 55 for protecting the connection portion N may be provided on the surface of the connection portion N of the side wall portion 11 (the support 113) opposite to the turnbuckle 51.

[0092] The number of movable protectors 100 included in the protector unit U is arbitrary. A configuration in which the protector unit U does not bend is also included in the protector unit U of the present invention. By moving each movable protector 100 constituting the protector unit U by the above-mentioned moving method, the protector unit U can be moved.

[0093] <Modification> The above-mentioned exemplary embodiments can be modified in various ways. Specific modified embodiments are exemplified below. Two or more embodiments selected from the following examples can be appropriately combined.

[0094] (1) FIG. 22 is a configuration diagram of a mobile protector 100 according to a modified example. As illustrated in FIG. 22, the mobile protector 100 according to the modified example is equipped with a guard rail for preventing a vehicle passing beside the mobile protector 100 from colliding with the mobile protector 100 in the event of an erroneous operation, and a safety device including a rear-end collision impact mitigation device and a runaway prevention stopper when the mobile protector 100 is traveling. The guard rail is, for example, a long member extending along the y direction, and is installed on the side of the side wall portion 11 (for example, the support 113 or the lower beam 111) or the side of the tire 20. The position where the guard rail is provided is appropriately changed depending on the position where the vehicle passes. For example, it is assumed that the guard rail is installed on both the positive and negative side of the side wall portion 11 (or the tire 20) in the X direction, or on only one of the side surfaces.

[0095] The rear-end collision impact mitigation device is a member that plastically deforms and cushions the impact of a rear-end collision if the mobile protector 100 runs away and collides with another vehicle. For example, the rear-end collision impact mitigation device is installed on the surface of the end portion in the y direction of the side wall portion 11 (the support pillar 113 in FIG. 22). The safety device is necessary when the longitudinal gradient of the tunnel is large, particularly when the longitudinal gradient is 3% or more.

[0096] 22, runaway prevention stoppers may be installed to stop the mobile protector 100 from running away. The runaway prevention stoppers are installed in front and behind the position of the mobile protector on the rail R (i.e., on the negative and positive sides of the y direction as seen from the mobile protector). The location of the runaway prevention stoppers is appropriately changed as the mobile protector moves.

[0097] On the other hand, when the mobile protector 100 is stopped, the load receiving device 40 is in contact with the ground to support the mobile protector 100, so the mobile protector 100 is stopped on the rail, but the mobile protector 100 may be provided with rail clamps (not shown) to grip the rail so that the mobile protector 100 does not move when stopped even if an unexpected force such as an operating force due to a longitudinal gradient acts on the mobile protector 100. The rail clamps are preferably installed in front of the leading mobile protector 100a and behind the trailing mobile protector 100b, and are installed regardless of the longitudinal gradient for safety.

[0098] (2) In each of the above-described embodiments, the lower beam 111 includes the first portion 91 and the second portion 92, but the configuration of the lower beam 111 is arbitrary. The lower beam 111 may include a portion different from the first portion 91 and the second portion 92, or a lower beam 111 whose position in the height direction (z direction) is constant from the negative end to the positive end of the side wall portion 11 in the y direction may be used.

[0099] (3) In the above embodiment, a situation in which the mobile protector 100 is used during tunnel widening work is assumed, but the situation in which the mobile protector 100 is used is not limited to the above examples. For example, the mobile protector 100 may be used to ensure vehicle passage during cutting and slope protection work. As can be understood from the above explanation, the mobile protector 100 according to the present invention is used to enable road construction work while ensuring vehicle passage. Road construction work includes, for example, road widening work in a tunnel, cutting and slope protection work, etc. However, road construction work is not limited to the above examples.

[0100] (4) In the above embodiment, the mobile protector 100 is moved by the electric tire 20, but the method of moving the mobile protector 100 (i.e., the method of rotating the tire 20) is arbitrary. For example, the mobile protector 100 may be moved by being pulled by a winch. Specifically, an anchor is installed in front of the mobile protector 100 in the traveling direction, and a winch is connected to the anchor. The mobile protector 100 is then pulled by the winch connected to the anchor. When the mobile protector 100 is pulled by a winch, a rod-shaped member may be provided to connect both side wall portions 11 in order to prevent the frame portion 10 from being distorted. For example, the vicinity of the tire 20 (for example, the first portion 91) on both side wall portions 11 is connected.

[0101] The mobile protector 100 may also be moved by a pressing device (e.g., a hydraulic jack) that presses the mobile protector 100 from the opposite side of the traveling direction. The mobile protector 100 pressed by the pressing device moves along the traveling direction. The method of moving the mobile protector 100 by a winch or pressing device is suitable when there is no space in the side wall portion 11 to install a motor. Also, a configuration that uses a winch or pressing device has the advantage of being cheaper than a configuration that uses a motor.

[0102] Furthermore, when moving the protector unit U, a heavy machine such as a backhoe may be positioned in the direction of travel, a wire may be connected to the front of the leading mobile protector 100a, and the leading mobile protector 100a and the trailing mobile protector 100b may be towed together to move the protector unit U. In addition, in order to reduce the weight to be moved, the protector unit U may be moved in the following procedure. First, the connection by the connection mechanism 50 is temporarily released to separate the leading mobile protector 100a and the trailing mobile protector 100b, allowing them to be towed individually by heavy machine. Next, the leading mobile protector 100a is moved forward, and then the trailing mobile protector 100b is also moved forward to move the leading mobile protector 100a to the rear of the leading mobile protector 100a. Then, the connection mechanism 50 is reconnected to integrate the leading mobile protector 100a and the trailing mobile protector 100b. However, the method of towing the mobile protector 100 using heavy machinery is limited to cases where sufficient space can be secured in the traveling direction of the mobile protector 100. As can be understood from the above explanation, the method of rotating the tire 20 (i.e., the method of moving the mobile protector 100) is arbitrary. [Explanation of symbols]

[0103] 1: Side wall 10: Frame section 11: Side wall 11A: First side wall part 11B: Second side wall part 13: Upper wall part 20A: Tire 20B: Wheel 30: Holding mechanism 31: Bearing part 32: Support member 33: Retaining member 40: Load receiving device 50: Connection mechanism 51: Turnbuckle 52: Pin member 53: Pin guide 55: Cover 57: Punching pin 591: Reinforcement plate 592: Reinforcement plate 70: Lid member 71: Hinge 73: Cylindrical rubber hose 75: Internal cover member 91 :1st part 92:Second part 100: Mobile Protector 111: Lower digit 112: Upper digit 113: Strut 330: Web Department 131: Cross beam 132: Stand 201 :First area 202:Second area 203:Third area 511: First shaft 512: Second shaft N: Connection part O: Rotation axis R: Rail R1: First rail section R2: Second rail section S: Cover U: Protector unit Q1: Pin hole Q2: Pin hole r1: First member r2: Second member r3: Third member r4: Fourth member r5: 5th component

Claims

1. A protector that enables road construction work while ensuring vehicle passage, a frame portion including a first side wall portion and a second side wall portion opposed to each other and an upper wall portion connecting upper portions of the two side wall portions; a tire installed on a lower portion of the first side wall portion and rotatable on a ground surface; a wheel installed at a lower portion of the second side wall portion and capable of running on a rail; Movement occurs due to the rotation of the tires and the running of the wheels. Mobile protector.

2. a load receiving device that is installed on the first side wall portion and the second side wall portion and that is in a state of contact with the ground and a state of being spaced from the ground; When the mobile protector is moving, the load receiving device is separated from the ground; When the mobile protector is stopped, the load receiving device is brought into contact with the ground to reduce the load applied to the tires and the wheels. The mobile protector of claim 1.

3. The outer circumferential surface of the wheel includes a first region located on one circumferential edge in a width direction, a second region located on the other circumferential edge in the width direction, and a third region located between the first region and the second region, the first region and the second region protrude from the third region, The third region of the wheel abuts against the rail. The mobile protector according to claim 1 or 2.

4. The tires and the wheels are electrically powered. A mobile protector according to any one of claims 1 to 3.

5. A plurality of mobile protectors according to any one of claims 1 to 4; a connection mechanism for connecting two adjacent movable protectors in the plurality of movable protectors so that spaces formed by the frame portions are connected to each other, The movable protector is bendable around a connecting portion where the two movable protectors are connected. Protector unit.

6. The connecting portion is provided with an openable and closable cover member for preventing water from entering the inside of the portable protector. The protector unit according to claim 5.

7. A method for installing a mobile protector according to any one of claims 1 to 4 on a road to be subjected to construction work, comprising the steps of: Assembling the mobile protector in a yard outside the road, and then moving the mobile protector from the yard to install the mobile protector on the road; When moving the vehicle from the yard to the road, the wheels run on rails installed between the yard and the road. How to install a mobile protector.

Images