Loading device

Abstract

The objective of this invention is to reduce the angle formed by the mainframe device with respect to the vertical axis. [Solution] The first side view shows that the fixed rail device is fixed to the upper surface of the vehicle body. The movable rail device is attached to the fixed rail device so as to be able to move forward and backward relative to the fixed rail device. The main frame device is attached to the movable rail device. In a first state in which the movable rail device protrudes rearward from the fixed rail device, the main frame device has a structure that allows it to rotate relative to the movable rail device about a first central axis that extends along the left and right axes. The first central axis is located in the portion in which the movable rail device protrudes rearward from the fixed rail device. The fixed rail device includes a first section including the front end of the fixed rail device and a second section excluding the first section. The first section has a structure that allows it to be removed from the upper surface of the vehicle body without the second section being removed from the upper surface of the vehicle body.

Description

Technical Field

[0001] The present invention relates to a loading device.

Background Art

[0002] As an invention related to a conventional loading device, for example, a ladder lifting device described in Patent Document 1 is known. This ladder lifting device includes a base member on which a main body frame disposed at a position higher than the upper surface of the vehicle body by a predetermined short dimension is disposed on the upper surface of the vehicle body, a ladder member holder capable of reciprocating in the vehicle front-rear direction with respect to this base member, and a rotation allowance mechanism that allows downward rotation of the rear end of the ladder member holder in a rearward slide state of the ladder member holder. When the ladder member holder slides rearward while remaining in a horizontal state, by applying an external force downward to the rear end side of the ladder member holder, the ladder is lowered due to the displacement of the rotation allowance mechanism, and from the ladder lowering state, by applying an external force upward to the rear end side of the ladder member holder, the ladder member holder returns to the horizontal state due to the displacement of the rotation allowance mechanism.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described ladder lifting device, in the ladder lowering state, the upper end of the ladder member holder inclines so as to be positioned in front of the lower end of the ladder member holder. In the field of ladder lifting devices, there is a desire to reduce the angle formed by the ladder member holder with respect to the vertical axis.

[0005] Therefore, an object of the present invention is to provide a loading device capable of reducing the angle formed by the main frame device with respect to the vertical axis.

Means for Solving the Problems

[0006] The first aspect is, The loading device comprises a fixed rail system, a movable rail system, and a main frame system. The aforementioned fixed rail device extends along the front and rear axes and is fixed to the upper surface of the vehicle body. The movable rail device extends along the front-rear axis and is attached to the fixed rail device so as to be movable in the forward and rearward directions relative to the fixed rail device. The main frame device extends along the front-rear axis and is attached to the movable rail device. In the first state in which the movable rail device protrudes rearward from the fixed rail device, the main frame device has a structure that allows it to rotate relative to the movable rail device about a first central axis extending along the left and right axes. The first central axis is located at the portion where the movable rail device protrudes rearward from the fixed rail device. The fixed rail device includes a first section including the front end of the fixed rail device, and a second section excluding the first section. The first section has a structure that allows it to be removed from the upper surface of the vehicle body without the second section being removed from the upper surface of the vehicle body. It is a loading device.

[0007] The second aspect is, The first section has a structure that allows it to rotate relative to the second section about a second central axis that extends along the left-right axis, The second central axis is located at the front end of the second section. This is the loading device described on the first side.

[0008] The third aspect is, The aforementioned loading device further comprises rollers, In the first state, the state in which the main frame device extends along the front-rear axis is defined as the second state. The roller is capable of rotating about a third central axis extending along the left and right axes, and is provided on the fixed rail device. In the second state described above, when the movable rail device is moved forward relative to the fixed rail device, the roller contacts the lower surface of the main frame device. This is a loading device as described on either the first or second side.

[0009] The fourth aspect is, The roller is provided on the left or right side of the fixed rail device. This is the loading device described on the third side.

[0010] The fifth aspect is, The aforementioned loading device further includes a restricting member, The regulating member is provided on the upper surface of the fixed rail device and, by contacting the side surface of the main frame device, guides the main frame device to move forward or backward. This is the loading device described on the fourth side.

[0011] The sixth aspect is, The aforementioned loading device further comprises a first locking device, In the first state, the state in which the main frame device extends along the front-rear axis is defined as the second state. In the first state, the state in which the main frame device has rotated clockwise from the second state, as viewed from the right, is defined as the third state. In the third state, the first locking device restricts the movement of the movable rail device so that the movable rail device cannot move forward relative to the fixed rail device by preventing the main frame device from contacting the first locking device. In the second state, the first locking device releases the restriction on the movement of the movable rail device so that the movable rail device can move forward relative to the fixed rail device by the main frame device contacting the first locking device. It is the loading device described in any one of the first to fifth side surfaces.

[0012] The seventh side surface is, The loading device further includes a second locking device, The second locking device includes an operating device, a support member, a lever, and a protrusion, The protrusion is provided on the main frame device, A state where the movable rail device is located at the front end of the movable range of the movable rail device with respect to the fixed rail device is defined as the fourth state, The lever is attached to the fixed rail device via the support member, and in the fourth state, is located behind the protrusion and contacts the protrusion, When the user operates the operating device, the lever moves to a position where the lever does not overlap with the protrusion when viewed from the front, It is the loading device described in any one of the first to sixth side surfaces.

[0013] The eighth side surface is, At least a part of the lower part of the rear surface of the vehicle body protrudes rearward from the upper part of the rear surface of the vehicle body. It is the loading device described in any one of the first to seventh side surfaces.

Effect of the Invention

[0014] According to the present invention, the angle formed by the main frame device with respect to the vertical axis can be reduced.

Brief Description of the Drawings

[0015] [Figure 1] FIG. 1 is a left side view of the vehicle 1. [Figure 2] FIG. 2 is a left side view of the vehicle 1. <o000105> [Figure 3] FIG. 3 is a left side view of the vehicle 1. [Figure 4] FIG. 4 is a left side view of the vehicle 1. [Figure 5] FIG. 5 is a left side view of the vehicle 1. [Figure 6] Figure 6 is a perspective view of the loading device 10. [Figure 7] Figure 7 is a perspective view of the loading device 10. [Figure 8] Figure 8 is a perspective view of the loading device 10. [Figure 9] Figure 9 is a perspective view of the loading device 10. [Figure 10] Figure 10 is a perspective view of the loading device 10. [Figure 11] Figure 11 is a cross-sectional view of XX in Figure 6. [Figure 12] Figure 12 is a cross-sectional view at YY in Figure 6. [Figure 13] Figure 13 is an enlarged perspective view of the vicinity of roller 18R. [Figure 14] Figure 14 is an enlarged perspective view of the vicinity of roller 18R. [Figure 15] Figure 15 is an enlarged perspective view of the first locking device 22L. [Figure 16] Figure 16 is an enlarged perspective view of the first locking device 22L. [Figure 17] Figure 17 is an enlarged view of the vicinity of the second locking device 24. [Figure 18] Figure 18 is an enlarged view of the vicinity of the second locking device 24. [Figure 19] Figure 19 is an enlarged view of the vicinity of the second locking device 24. [Figure 20] Figure 20 is an enlarged view of the vicinity of the operating device 245. [Figure 21] Figure 21 is an enlarged view of the vicinity of the operating device 245. [Figure 22] Figure 22 is an enlarged view of the vicinity of the operating device 245. [Modes for carrying out the invention]

[0016] (Embodiment) [Structure of the loading device 10] The structure of a vehicle 1 equipped with a loading device 10 according to one embodiment of the present invention will be described below with reference to the drawings. Figures 1 to 5 are left side views of the vehicle 1. In this specification, the forward, rear, left, right, up, and down directions of the vehicle 1 are simply referred to as the forward, rear, left, right, up, and down directions.

[0017] In this specification, the front of a component (for example, the vehicle body 2) means the front half of the component. The rear, left, right, top, and bottom of a component are also treated the same as the front. The front end of a component refers to the point located furthest forward in the component. The rear end, left end, right end, top, and bottom of a component are also treated the same as the front end. The front end of a component refers to the front end and its surroundings in the component. The rear end, left end, right end, top, and bottom of a component are also treated the same as the front end.

[0018] Vehicle 1 is a fire truck. As shown in Figures 1 to 5, Vehicle 1 comprises a body 2, a lid 3, and a loading device 10. The body 2 houses firefighting equipment such as portable pumps and generators, as well as emergency medical equipment. The body 2 has an upper surface Su and a rear surface Sb. The upper surface Su is located on the top of the body 2 and is the surface of the body 2 that faces upward. The rear surface Sb is located at the rear of the body 2 and is the surface of the body 2 that faces backward. At least a portion of the lower part of the rear surface Sb of the body 2 protrudes backward from the upper part of the rear surface Sb of the body 2. At least a portion of the lower part of the rear surface Sb of the body 2 protrudes backward from the rear end of the upper surface Su of the body 2.

[0019] A maintenance hole H is provided on the upper surface Su of the vehicle body 2. The maintenance hole H is an opening for the user to access tanks and other components located inside the vehicle body 2. The maintenance hole H is located between the front wheel (not shown) and the rear wheel of the vehicle 1. The distance from the maintenance hole H to the front wheel is shorter than the distance from the maintenance hole H to the rear wheel.

[0020] Cover 3 is a disc-shaped component. Cover 3 covers the maintenance hole H.

[0021] Next, an overview of the structure of the loading device 10 will be described. The loading device 10 can move a ladder (not shown) loaded on the upper surface Su of the vehicle body 2 to behind the rear surface Sb of the vehicle body 2. This allows the user to easily remove the ladder from the loading device 10 and use it. The loading device 10 can move a ladder located behind the rear surface Sb of the vehicle body 2 to the upper surface Su of the vehicle body 2. This allows the user to attach a used ladder to the loading device 10 and load it onto the upper surface Su of the vehicle body 2. Such a loading device 10 includes a fixed rail device 12, a movable rail device 14, a main frame device 16, and rollers 18L, 18R (only roller 18L is shown).

[0022] The fixed rail device 12 extends along the longitudinal axis. The fixed rail device 12 is fixed to the upper surface Su of the vehicle body 2. The fixed rail device 12 includes a first section 12a which includes the front end of the fixed rail device 12, and a second section 12b which excludes the first section 12a. More specifically, the first section 12a and the second section 12b extend along the longitudinal axis. The length of the second section 12b along the longitudinal axis is longer than the length of the first section 12a along the longitudinal axis. The second section 12b is located behind the first section 12a. The first section 12a is located above the cover 3.

[0023] The movable rail device 14 extends along the longitudinal axis. However, the length of the movable rail device 14 along the longitudinal axis is shorter than the length of the fixed rail device 12 along the longitudinal axis. The movable rail device 14 is attached to the fixed rail device 12 so that it can move forward and backward relative to the fixed rail device 12. Hereinafter, the range in which the movable rail device 14 can move relative to the fixed rail device 12 will be referred to as the movable range A. The front end Af of the movable range A is the position of the front end of the movable rail device 14 in the state shown in Figure 1. The rear end Ab of the movable range A is the position of the front end of the movable rail device 14 in the state shown in Figure 3.

[0024] The main frame device 16 extends along the longitudinal axis. The main frame device 16 is attached to the movable rail device 14. In Figure 1, the main frame device 16 is positioned above the movable rail device 14. The main frame device 16 cannot move forward or backward relative to the movable rail device 14. However, because the movable rail device 14 can move forward and backward relative to the fixed rail device 12, the main frame device 16 can move forward and backward relative to the fixed rail device 12.

[0025] Furthermore, in the first state (see Figures 3 and 4) in which the movable rail device 14 protrudes rearward from the fixed rail device 12, the main frame device 16 has a structure that allows it to rotate relative to the movable rail device 14 about a first central axis Ax1 that extends along the left and right axes. The first central axis Ax1 is located at the portion in which the movable rail device 14 protrudes rearward from the fixed rail device 12. In this embodiment, the first central axis Ax1 is located at the rear end of the movable rail device 14.

[0026] Roller 18L is located on the left side of the fixed rail device 12. Roller 18R is located on the right side of the movable rail device 14. In this embodiment, rollers 18L and 18R are located at the rear end of the fixed rail device 12. Rollers 18L and 18R have a cylindrical shape with a central axis extending along the left and right axes. Rollers 18L and 18R can rotate around a third central axis Ax3 that extends along the left and right axes.

[0027] [Operation of the loading device 10] Next, the operation of the loading device 10 will be explained with reference to Figures 1 to 5. The loading device 10 can perform the operation of removing a ladder (not shown) from the loading device 10 (hereinafter referred to as the removal operation) and the operation of attaching the ladder to the loading device 10 (hereinafter referred to as the attachment operation).

[0028] During the removal operation, as shown in Figure 1, the front end of the movable rail device 14 is located at the front end Af within the movable range A. The main frame device 16, to which a ladder (not shown) is attached, is loaded onto the upper surface Su of the vehicle body 2.

[0029] The user pulls the main frame device 16 in the rearward direction. This causes the movable rail device 14 and the main frame device 16 to move rearward relative to the fixed rail device 12. Then, as shown in Figure 3, the front end of the movable rail device 14 is located at the rear end Ab in the movable range A. The main frame device 16 extends along the front-rear axis.

[0030] As shown in Figure 4, the user rotates the main frame device 16, to which the ladder is attached, clockwise while looking to the right. This positions the main frame device 16 with the ladder attached behind the vehicle body 2 and extends along the vertical axis. However, the main frame device 16 is tilted with respect to the vertical axis such that its upper end is in front of its lower end. This allows the user to remove the ladder from the main frame device 16.

[0031] Furthermore, the first section 12a has a structure that allows it to be removed from the upper surface Su of the vehicle body 2 without the second section 12b being removed from the upper surface Su of the vehicle body 2. More specifically, as shown in Figure 5, the first section 12a has a structure that allows it to rotate relative to the second section 12b about a second central axis Ax2 that extends along the left and right axes. The second central axis Ax2 is located at the front end of the second section 12b. As a result, the first section 12a can move from the space above the lid 3 to the space above and behind the lid 3. Therefore, the user can open the lid 3 or remove it from the vehicle body 2. Thus, the user can access the tank, etc.

[0032] During the installation process, as shown in Figure 4, the front end of the movable rail device 14 is located at the rear end Ab within the movable range A. The main frame device 16 is located behind the vehicle body 2 and extends along the vertical axis. The user then attaches a ladder to the main frame device 16.

[0033] As shown in Figure 3, the user rotates the main frame device 16, to which the ladder is attached, counterclockwise while looking to the right. As a result, the main frame device 16 extends rearward from the vehicle body 2. However, as shown in Figure 3, the main frame device 16 is tilted with respect to the longitudinal axis such that its front end is slightly above its rear end. Also, in the state shown in Figure 3, the rollers 18L and 18R are not in contact with the main frame device 16. Hereafter, as shown in Figure 3, the state in which the main frame device 16 extends along the longitudinal axis in the first state is defined as the second state. Note that the first state is the state in which the movable rail device 14 protrudes rearward from the fixed rail device 12, as shown in Figures 3 and 4.

[0034] The user pushes the main frame device 16 forward, as shown in Figure 2. In the second state, when the movable rail device 14 is moved forward relative to the fixed rail device 12, the rollers 18L and 18R come into contact with the lower surface of the main frame device 16. As the main frame device 16 moves forward, the rollers 18L and 18R are rotated counterclockwise when viewed from the right.

[0035] Furthermore, when the first central axis Ax1 is positioned in front of the rollers 18L and 18R, the rollers 18L and 18R push the rear of the main frame device 16 upward. As a result, as shown in Figure 1, the main frame device 16 assumes a position parallel to the longitudinal axis. The movable rail device 14 is then positioned at its front end Af within the movable range A. The main frame device 16, to which a ladder (not shown) is attached, is loaded onto the upper surface Su of the vehicle body 2.

[0036] [Detailed structure of each part of the loading device 10] Next, the detailed structure of each part of the loading device 10 will be described with reference to the drawings. Figures 6 to 10 are perspective views of the loading device 10. Figure 11 is a cross-sectional view at XX in Figure 6. Figure 12 is a cross-sectional view at YY in Figure 6. Figures 13 and 14 are enlarged perspective views of the vicinity of the roller 18R. Figures 15 and 16 are enlarged perspective views of the first locking device 22L. Figures 17 to 19 are enlarged views of the vicinity of the second locking device 24. Figures 20 to 22 are enlarged views of the vicinity of the operating device 245.

[0037] (Structure of the fixed rail device 12) As shown in Figures 6 to 8, the fixed rail device 12 includes a left fixed rail 120L, a right fixed rail 120R, and a plurality of connecting members 122. The left fixed rail 120L and the right fixed rail 120R extend along the longitudinal axis. The left fixed rail 120L is located to the left of the right fixed rail 120R. The left fixed rail 120L and the right fixed rail 120R are fixed to the upper surface Su of the vehicle body 2 with screws.

[0038] Furthermore, as shown in Figure 11, the left fixed rail 120L includes an upper member 120Lu, a left side member 120Ll, and a lower member 120Ld. The upper member 120Lu and the lower member 120Ld have a plate shape with an upper and lower surface. The left side member 120Ll has a plate shape with a left and right surface. The upper member 120Lu extends to the right from the upper end of the left side member 120Ll. The lower member 120Ld extends to the right from the lower end of the left side member 120Ll. However, the length of the upper member 120Lu in the left-right direction is slightly longer than the length of the lower member 120Ld in the left-right direction. Therefore, the right end of the upper member 120Lu is located to the right of the right end of the lower member 120Ld. As a result, the left fixed rail 120L has a shape that is a square U-shape rotated 90 degrees clockwise. Since the right fixed rail 120R has a structure that is symmetrical to the left fixed rail 120L, the explanation of the right fixed rail 120R will be omitted.

[0039] Furthermore, as shown in Figure 7, the left fixed rail 120L includes the first section 120La and the second section 120Lb. The right fixed rail 120R includes the first section 120Ra and the second section 120Rb. The first sections 120La and 120Ra correspond to the first section 12a. The second sections 120Lb and 120Rb correspond to the second section 12b. And, as shown in Figure 9, each of the first sections 120La and 120Ra has a structure that allows it to rotate around the second central axis Ax2 extending along the left and right axes relative to the second sections 120Lb and 120Rb. Therefore, the first section 120La is connected to the second section 120Lb via a hinge. The first section 120Ra is connected to the second section 120Rb via a hinge.

[0040] Each of the multiple connecting members 122 extends in the left-right direction. The multiple connecting members 122 are arranged in a line along the front-rear axis. Each of the multiple connecting members 122 is connected to the left fixed rail 120L and the right fixed rail 120R. As a result, the fixed rail device 12 has a ladder shape.

[0041] (Structure of the movable rail device 14) As shown in Figures 6 to 9, the movable rail device 14 includes a left movable rail 140L, a right movable rail 140R, a plurality of connecting members 142, a plurality of left rollers 144L (see Figure 11), a plurality of right rollers 144R (see Figure 11), a left support part 146L (see Figure 10), a right support part 146R (see Figure 11), a left damper 148L (see Figure 10), and a right damper 148R (see Figure 10).

[0042] The left movable rail 140L and the right movable rail 140R extend along the longitudinal axis. The left movable rail 140L is located to the left of the right movable rail 140R. Also, as shown in Figure 11, the left movable rail 140L is located to the right of the left fixed rail 120L. A resin sheet is provided on the left side of the left movable rail 140L to reduce friction between the left movable rail 140L and the left fixed rail 120L. The right movable rail 140R is located to the left of the right fixed rail 120R. A resin sheet is provided on the right side of the right movable rail 140R to reduce friction between the right movable rail 140R and the right fixed rail 120R.

[0043] As shown in Figure 8, each of the multiple connecting members 142 extends in the left-right direction. The multiple connecting members 142 are arranged in a line along the front-rear axis. Each of the multiple connecting members 142 is connected to the left movable rail 140L and the right movable rail 140R. As a result, the movable rail device 14 has a ladder shape.

[0044] As shown in Figure 11, multiple left rollers 144L are provided on the left side of the left movable rail 140L. These multiple left rollers 144L are arranged in a single line along the front-rear axis. Multiple right rollers 144R are provided on the right side of the right movable rail 140R. These multiple right rollers 144R are arranged in a single line along the front-rear axis. The left rollers 144L and right rollers 144R have a cylindrical shape with a central axis extending along the left-right axis. They can rotate around this central axis. These multiple left rollers 144L are arranged in the space enclosed by the left fixed rail 120L. The multiple left rollers 144L can roll forward or backward by being guided by the upper surface member 120Lu of the left fixed rail 120L. The multiple right rollers 144R are arranged in the space enclosed by the right fixed rail 120R. Multiple right rollers 144R can roll forward or backward while being guided by the upper surface member 120Ru of the right fixed rail 120R. This allows the movable rail device 14 to move forward or backward relative to the fixed rail device 12.

[0045] As shown in Figure 10, the left support portion 146L supports the main frame device 16 so that the main frame device 16 can rotate relative to the movable rail device 14 around the first central axis Ax1. More specifically, as shown in Figure 10, the left support portion 146L is provided at the rear end of the left movable rail 140L. The left support portion 146L has an axial member that extends along the left-right axis. The axial member passes through the left main frame member 160L, which will be described later, along the left-right axis. Note that the right support portion 146R has a structure that is symmetrical to the left support portion 146L, so the description of the right support portion 146R will be omitted.

[0046] The left damper 148L is connected to the left movable rail 140L and the left main frame member 160L. In this embodiment, in the state shown in Figures 9 and 10, the left damper 148L is connected to the rear of the left movable rail 140L and to the portion of the left main frame member 160L above the first central axis Ax1. In the state shown in Figures 9 and 10, the left damper 148L reduces the speed at which the main frame device 16 rotates in a counterclockwise direction when viewed from the right. Note that the right damper 148R has a structure symmetrical to the left damper 148L, so the description of the right damper 148R is omitted.

[0047] (Structure of mainframe device 16) As shown in Figure 8, the main frame device 16 includes a left main frame member 160L, a right main frame member 160R, a plurality of connecting members 162, and an operating rod 164.

[0048] The left main frame member 160L and the right main frame member 160R extend along the front-rear axis. The left main frame member 160L is located to the left of the right main frame member 160R. Also, as shown in Figures 11 and 12, the left main frame member 160L is located to the upper left of the left fixed rail 120L. Furthermore, the left main frame member 160L is located above the roller 18L. The right main frame member 160R is located to the upper right of the right fixed rail 120R. Furthermore, the right main frame member 160R is located above the roller 18R.

[0049] Each of the multiple connecting members 162 extends in the left-right direction. The multiple connecting members 162 are arranged in a line along the front-rear axis. Each of the multiple connecting members 162 is connected to the left main frame member 160L and the right main frame member 160R. As a result, the main frame device 16 has a ladder shape.

[0050] As shown in Figure 6, the operating rod 164 is a rod-shaped member that extends along the vertical axis. The operating rod 164 extends downward from the rearmost connecting member 162 among the multiple connecting members 162. By applying force to the operating rod 164, the user moves the main frame device 16 forward or backward, or rotates the main frame device 16.

[0051] (Structure of regulating members 20L and 20R) As shown in Figures 13 and 14, the loading device 10 further includes regulating members 20L and 20R. The regulating members 20L and 20R (regulating member 20L is not shown) are provided on the upper surface of the fixed rail device 12. In this embodiment, regulating member 20L protrudes upward from the upper surface of the left fixed rail 120L. Also, regulating member 20L is located to the upper right of roller 18L. Regulating member 20R protrudes upward from the upper surface of the right fixed rail 120R. Also, regulating member 20R is located to the upper left of roller 18R. These regulating members 20L and 20R contact the side surfaces of the main frame device 16. In this embodiment, regulating member 20L contacts the right side of the left main frame member 160L. Regulating member 20R contacts the left side of the right main frame member 160R. As a result, regulating members 20L and 20R guide the main frame device 16 to move forward or backward. As a result, when the mainframe device 16 moves forward or backward, it is difficult for the mainframe device 16 to move to the right or left.

[0052] (Structure of the first locking devices 22L and 22R) As shown in Figure 10, the loading device 10 is further equipped with first locking devices 22L and 22R. Here, in the first state, the state in which the main frame device 16 has rotated clockwise from the second state (Figure 3) when viewed to the right is defined as the third state (Figure 4).

[0053] In the third state, the first locking devices 22L and 22R restrict the movement of the movable rail device 14 so that it cannot move forward relative to the fixed rail device 12, by preventing the main frame device 16 from contacting the first locking devices 22L and 22R. On the other hand, in the second state, the first locking devices 22L and 22R release the restriction on the movement of the movable rail device 14 so that it can move forward relative to the fixed rail device 12, by allowing the main frame device 16 to contact the first locking devices 22L and 22R.

[0054] To achieve the above operation, as shown in Figure 15, the first locking device 22L includes a support member 220L, a swinging member 222L, and a projection 224L. The support member 220L is provided on the left movable rail 140L. The support member 220L is located at the front end of the left movable rail 140L. The support member 220L has an upper surface Su1 facing upward. The upper surface Su1 is located slightly above the left movable rail 140.

[0055] The oscillating member 222L includes a first contact member 222La and a second contact member 222Lb. The first contact member 222La has a rod shape extending in the left-right direction. The central part of the first contact member 222La in the left-right direction is supported by a support member 220L. The first contact member 222La can also rotate relative to the support member 220L about a fourth central axis Ax4L that extends along the front-rear axis. The part of the support member 220L located to the right of the fourth central axis Ax4L is located on the left fixed rail 120L. Hereafter, the part located to the right of the central axis of the member will simply be referred to as the right part of the member. The left part of the member, the front part of the member, the rear part of the member, the upper part of the member, and the lower part of the member will have the same meaning as the right part of the member. The second contact member 222Lb is a rod-shaped member extending rearward from the left end of the first contact member 222La. Furthermore, the right side of the oscillating member 222L is heavier than the left side. Therefore, as shown in Figure 15, the right side of the oscillating member 222L is located lower than the left side. Thus, the right side of the oscillating member 222L is in contact with the upper surface of the left fixed rail 120L.

[0056] The projection 224L is provided on the upper surface of the left fixed rail 120L. In this embodiment, the projection 224L protrudes upward from the upper surface of the left fixed rail 120L. The rear surface of the projection 224L faces backward. The front surface of the projection 224L faces forward and upward. Since the oscillating member 222R and the projection 224R have structures that are symmetrical to the oscillating member 222L and the projection 224L, a description of the oscillating member 222R and the projection 224R will be omitted.

[0057] Next, the operation of the first locking devices 22L and 22R will be described. Since the operation of the first locking device 22R is the same as that of the first locking device 22L, the operation of the first locking device 22L will be described below.

[0058] In the second state shown in Figure 7, the left main frame member 160L extends along the front-rear axis. As a result, the left main frame member 160L pushes the second contact member 222Lb downward. Consequently, as shown in Figure 16, the left part of the oscillating member 222L is positioned below the right part of the oscillating member 222L. As a result, the right part of the first contact member 222La is not positioned behind the projection 224L. Therefore, when the movable rail device 14 moves forward, the right part of the first contact member 222La does not come into contact with the projection 224L. Thus, the movable rail device 14 can move forward relative to the fixed rail device 12.

[0059] Furthermore, in the second state shown in Figures 3 and 7, and the fourth state shown in Figure 1, the connecting member 162 is in contact with the upper surface Su1 of the support member 220L. In other words, the connecting member 162 is supported by the support member 220L.

[0060] In the third state shown in Figure 8, the left main frame member 160L extends along the vertical axis. Therefore, the left main frame member 160L does not contact the second contact member 222Lb. The right side of the oscillating member 222L is heavier than the left side of the oscillating member 222L. Therefore, as shown in Figure 15, the right side of the oscillating member 222L is located below the left side of the oscillating member 222L. As a result, the right side of the first contact member 222La is located behind the projection 224L. Therefore, when the movable rail device 14 attempts to move forward, the right side of the first contact member 222La comes into contact with the projection 224L. Consequently, the movable rail device 14 cannot move forward relative to the fixed rail device 12.

[0061] (Second locking device 24) As shown in Figures 17 to 22, the loading device 10 further comprises a second locking device 24. The second locking device 24 includes a support member 240, a lever 242, a projection 244, and an operating device 245. The support member 240 is provided on the fixed rail device 12. In this embodiment, the support member 240 is attached to the rearmost connecting member 122 among a plurality of connecting members 122.

[0062] The lever 242 has a rod shape that extends in the left-right direction. The central part of the lever 242 in the left-right direction is supported by a support member 240. The lever 242 can rotate relative to the support member 240 about a fifth central axis Ax5 that extends along the front-rear axis. As a result, the lever 242 is attached to the fixed rail device 12 via the support member 240. The right part of the lever 242 is located below the operating rod 164.

[0063] As shown in Figure 17, the projection 244 is provided on the main frame device 16. In this embodiment, the projection 244 protrudes downward from the lower surface of the operating rod 164. The rear surface of the projection 244 faces backward. The front surface of the projection 244 faces forward and downward.

[0064] As shown in Figure 20, the operating device 245 includes a rod 246, a support member 248, a first lever 250, a handle 252, a second lever 254, and a spring 256. The support member 248 is provided on the rear surface Sb of the vehicle body 2.

[0065] The first lever 250 has a rod shape that extends in the left-right direction. The central part of the first lever 250 in the left-right direction is supported by a support member 248. The first lever 250 can rotate relative to the support member 248 about a sixth central axis Ax6 that extends along the front-rear axis. As a result, the first lever 250 is attached to the rear surface Sb of the vehicle body 2 via the support member 248.

[0066] Rod 246 is a rod-shaped member that extends in the vertical direction. The upper end of rod 246 is connected to the left side of lever 242. The lower end of rod 246 is connected to the right side of first lever 250.

[0067] The handle 252 has a cylindrical shape with a central axis extending along the front-rear axis. The handle 252 is connected to the portion of the first lever 250 located to the left of the sixth central axis Ax6. In this embodiment, the handle 252 is connected to the left end of the first lever 250. The user can rotate the first lever 250 by applying force to the handle 252.

[0068] The second lever 254 extends in the vertical direction. The central part of the second lever 254 in the vertical direction is supported by a support member 248. The second lever 254 can rotate relative to the support member 248 about a seventh central axis Ax7 that extends along the left-right axis. A step is provided at the upper end of the second lever 254. More specifically, a projection 254a is provided at the upper end of the second lever 254, so that the rear part of the upper end of the second lever 254 protrudes upward from the front part of the upper end of the second lever 254.

[0069] The spring 256 is supported by the support member 248. When viewed from the right, the spring 256 applies a force to the second lever 254 that causes it to rotate counterclockwise.

[0070] Next, the operation of the second locking device 24 will be described. As shown in Figures 1 and 6, the state in which the front end of the movable rail device 14 is located at the front end Af of the movable range A of the movable rail device 14 relative to the fixed rail device 12 is defined as the fourth state.

[0071] As shown in Figure 22, in the fourth state, the left side of the first lever 250 is positioned above the right side of the first lever 250. At this time, the step at the upper end of the second lever 254 is hooked onto the left side of the first lever 250. The projection 254a of the second lever 254 is in contact with the front surface of the left side of the first lever 250. The second lever 254 is pressed against the front surface of the first lever 250 by the spring 256. As a result, the first lever 250 cannot rotate counterclockwise when viewed from the front.

[0072] Furthermore, as shown in Figure 17, the right side of the lever 242 is positioned above the left side. As a result, the lever 242 is positioned behind the projection 244 and is in contact with the projection 244. Therefore, in the fourth state, when the movable rail device 14 and the main frame device 16 attempt to move in the rearward direction, the right side of the lever 242 comes into contact with the projection 244. Consequently, the movable rail device 14 and the main frame device 16 cannot move in the rearward direction relative to the fixed rail device 12.

[0073] On the other hand, as shown in Figures 18 and 21, when the user operates the operating device 245, the lever 242 moves to a position where it does not overlap with the projection 244 when viewed from the front. More specifically, the user pushes the lower part of the second lever 254 forward. This allows the first lever 250 to rotate counterclockwise when viewed from the front. The user then pushes the handle 252 downward, rotating the first lever 250 counterclockwise when viewed from the front. This causes the rod 246 to move upward. Accordingly, the left part of the lever 242 is pushed upward by the rod 246. This causes the lever 242 to rotate clockwise when viewed from the front. As a result, the lever 242 moves to a position where it does not overlap with the projection 244 when viewed from the front. Therefore, when the movable rail device 14 and the main frame device 16 move backward, the lever 242 does not come into contact with the projection 244. Therefore, the movable rail device 14 and the main frame device 16 can move in the rearward direction relative to the fixed rail device 12.

[0074] [effect] The loading device 10 allows for a reduction in the angle θ (see Figure 4) formed by the main frame device 16 with respect to the vertical axis. More specifically, the lid 3 is provided on the upper surface Su of the vehicle body 2, as shown in Figure 4. Therefore, in conventional loading devices, the fixed rail device 12 is positioned so as not to overlap with the lid 3. Consequently, it was difficult to increase the length of the fixed rail device 12 along the longitudinal axis.

[0075] Therefore, the first section 12a of the fixed rail device 12 has a structure that allows it to be removed from the upper surface Su of the vehicle body 2 without the second section 12b being removed from the upper surface Su of the vehicle body 2. As a result, even if the first section 12a is positioned to overlap the cover 3, the user can remove the cover 3 from the upper surface Su of the vehicle body 2 by removing the first section 12a from the upper surface Su of the vehicle body 2. Thus, the length of the fixed rail device 12 along the longitudinal axis can be increased. When the length of the fixed rail device 12 along the longitudinal axis is increased, the length of the movable rail device 14 along the longitudinal axis can also be increased. In this case, as shown in Figures 3 and 4, the movable rail device 14 can protrude significantly in the rearward direction from the vehicle body 2. Therefore, even if the angle θ is small, the main frame device 16 is less likely to come into contact with the vehicle body 2. For the reasons above, the loading device 10 allows the angle θ (see Figure 4) formed by the main frame device 16 with respect to the vertical axis to be reduced.

[0076] In the loading device 10, the first section 12a has a structure that allows it to rotate around the second central axis Ax2, which extends along the left and right axes, relative to the second section 12b. This allows the user to move the first section 12a from above the lid 3 with simple operation. Furthermore, since the first section 12a is not removed from the second section 12b, there is no need to secure a storage space for the first section 12a.

[0077] With the loading device 10, the forces applied to the left support portion 146L and the right support portion 146R are reduced. More specifically, as shown in Figure 2, in the second state, when the movable rail device 14 is moved forward relative to the fixed rail device 12, the rollers 18L and 18R come into contact with the lower surface of the main frame device 16. Then, in the fourth state shown in Figure 1, the left support portion 146L and the right support portion 146R are positioned between the support members 220L and 220R and the rollers 18L and 18R in the longitudinal axis. At this time, the main frame device 16 is parallel to the longitudinal axis. Therefore, the main frame device 16 is supported by the support members 220L and 220R and the rollers 18L and 18R. As a result, with the loading device 10, the forces applied to the left support portion 146L and the right support portion 146R are reduced.

[0078] The loading device 10 reduces the vertical thickness of the loading device 10. More specifically, the mounting position of the rollers 18L and 18R to the fixed rail device 12 in the conventional loading device was higher than the mounting position of the rollers 18L and 18R to the fixed rail device 12 in the loading device 10. Furthermore, the rollers 18L and 18R in the conventional loading device had a stepped structure with a large diameter portion and a small diameter portion. The diameter of the large diameter portion of the rollers 18L and 18R in the conventional loading device was larger than the diameter of the rollers 18L and 18R in the loading device 10. As a result, in the conventional loading device, the large diameter portion of the rollers 18L and 18R contacts the side surface of the main frame device 16. Therefore, the large diameter portion of the rollers 18L and 18R functions as a guide for the movement of the main frame device 16. Therefore, in conventional loading devices, when the main frame device 16 moves forward or backward, the main frame device 16 is less likely to be displaced to the right or left. In addition, the small diameter portions of the rollers 18L and 18R contact the lower surface of the main frame device 16. Thus, the small diameter portions of the rollers 18L and 18R support the main frame device 16.

[0079] On the other hand, in the loading device 10, the regulating members 20L and 20R are provided on the upper surface of the fixed rail device 12. The regulating members 20L and 20R contact the side surface of the main frame device 16, thereby guiding the main frame device 16 to move forward or backward. As a result, the rollers 18L and 18R do not need to function as guides for the movement of the main frame device 16. Therefore, in the loading device 10, the roller 18L is provided on the left side of the fixed rail device 12. The roller 18R is provided on the right side of the fixed rail device 12. Furthermore, the diameters of the rollers 18L and 18R in the loading device 10 are smaller than the diameter of the large diameter portion of the rollers 18L and 18R in conventional loading devices. As a result, the vertical thickness of the loading device 10 is reduced.

[0080] According to the loading device 10, in the third state shown in Figure 4, the movable rail device 14 and the main frame device 16 do not unnecessarily slide forward relative to the fixed rail device 12. More specifically, in the third state shown in Figure 4, the first locking devices 22L and 22R restrict the movement of the movable rail device 14 so that the movable rail device 14 cannot move forward relative to the fixed rail device 12 by preventing the main frame device 16 from contacting the first locking devices 22L and 22R. On the other hand, in the second state shown in Figure 3, the first locking devices 22L and 22R release the restriction on the movement of the movable rail device 14 so that the movable rail device 14 can move forward relative to the fixed rail device 12 by allowing the main frame device 16 to contact the first locking devices 22L and 22R. As a result, unless the user tilts the main frame device 16, the movable rail device 14 and the main frame device 16 cannot move forward relative to the fixed rail device 12. Therefore, according to the loading device 10, in the third state shown in Figure 4, the movable rail device 14 and the main frame device 16 do not unnecessarily move forward relative to the fixed rail device 12.

[0081] According to the loading device 10, in the fourth state shown in Figure 6, the movable rail device 14 and the main frame device 16 do not unnecessarily move backward relative to the fixed rail device 12. More specifically, the lever 242 is located behind the projection 244 and is in contact with the projection 244. Therefore, in the fourth state, when the movable rail device 14 and the main frame device 16 attempt to move backward, the right side of the lever 242 comes into contact with the projection 244. Thus, the movable rail device 14 and the main frame device 16 cannot move backward relative to the fixed rail device 12. However, as shown in Figures 18 and 21, when the user operates the operating device 245, the lever 242 moves to a position where it does not overlap with the projection 244 when viewed from the front. Therefore, when the movable rail device 14 and the main frame device 16 move backward, the lever 242 does not come into contact with the projection 244. Thus, the movable rail device 14 and the main frame device 16 can move backward relative to the fixed rail device 12. As described above, unless the user operates the operating device 245, the movable rail device 14 and the main frame device 16 cannot move backward relative to the fixed rail device 12. Therefore, with the loading device 10, in the fourth state shown in Figure 6, the movable rail device 14 and the main frame device 16 do not unnecessarily move backward relative to the fixed rail device 12.

[0082] (Other embodiments) The loading device according to the present invention is not limited to loading device 10, but can be modified within the scope of its gist.

[0083] Note that the first locking device 22L is not limited to the structure shown in Figure 15. For example, the projection 224L may be provided on the left movable rail 140L. And the support member 220L may be provided on the left fixed rail 120L.

[0084] Furthermore, the first section 12a may be removed from the second section 12b. Also, the first section 120La may be rotatable around a central axis extending along the vertical axis relative to the second section 120Lb. The first section 120Ra may be rotatable around a central axis extending along the vertical axis relative to the second section 120Rb.

[0085] Note that Vehicle 1 is not limited to a fire truck. Vehicle 1 can be any type of vehicle in which equipment is loaded on the upper surface Su of the vehicle body 2.

[0086] Note that lid 3 does not have to be a disc-shaped component. Lid 3 can be in the shape of a plate. [Explanation of Symbols]

[0087] 1: Vehicle 2: Vehicle body 3: Lid 10: Loading device 12: Fixed rail device 12a: Section 1 12b: Section 2 14: Movable rail device 16: Mainframe device 18L, 18R: Roller 20L, 20R: Regulating member 22L, 22R: First locking device 24: Second locking device 120L: Left fixed rail 120La: Section 1 120Lb: Section 2 120Ld: Bottom part 120Ll: Left side member 120Lu: Top surface component 120R: Right fixed rail 120Ra: Section 1 120Rb: Section 2 122: Connecting member 140L: Left movable rail 140R: Right movable rail 142: Connecting member 144L: Left roller 144R: Right roller 146L: Left support part 146R: Right support part 148L: Left damper 148R: Right damper 160L: Left main frame component 160R: Right main frame component 162: Connecting member 164: Operation stick 220L: Support member 222L: Oscillating member 222La: First contact member 222Lb: Second contact member 222R: Oscillating member 222Ra: First contact member 222Rb: Second contact member 224L: Protrusion 240: Support member 242: Lever 244: Protrusion 245: Operating device 246: Rod 248: Support member 250: First lever 252: Handle 252a: Protrusion 254: Second lever 256: Spring A: Range of motion Ab: rear end Af: Front end Ax1: 1st center axis Ax2: 2nd central axis Ax3: 3rd central axis Ax4L: 4th central axis Ax5: 5th central axis Ax6: 6th central axis Ax7: 7th central axis H: Maintenance port Sb: Rear Su:Top surface

Claims

1. The loading device comprises a fixed rail system, a movable rail system, and a main frame system. The aforementioned fixed rail device extends along the front and rear axes and is fixed to the upper surface of the vehicle body. The movable rail device extends along the front-rear axis and is attached to the fixed rail device so as to be movable in the forward and rearward directions relative to the fixed rail device. The main frame device extends along the front-rear axis and is attached to the movable rail device. In the first state in which the movable rail device protrudes rearward from the fixed rail device, the main frame device has a structure that allows it to rotate relative to the movable rail device about a first central axis extending along the left and right axes. The first central axis is located at the portion where the movable rail device protrudes rearward from the fixed rail device. The fixed rail device includes a first section including the front end of the fixed rail device, and a second section excluding the first section. The first section has a structure that allows it to be removed from the upper surface of the vehicle body without the second section being removed from the upper surface of the vehicle body. Loading device.

2. The first section has a structure that allows it to rotate relative to the second section about a second central axis that extends along the left-right axis, The second central axis is located at the front end of the second section. The loading device according to claim 1.

3. The aforementioned loading device further comprises rollers, In the first state, the state in which the main frame device extends along the front-rear axis is defined as the second state. The roller is capable of rotating about a third central axis extending along the left and right axes, and is provided on the fixed rail device. In the second state described above, when the movable rail device is moved forward relative to the fixed rail device, the roller contacts the lower surface of the main frame device. A loading device according to either claim 1 or claim 2.

4. The roller is provided on the left or right side of the fixed rail device. The loading device according to claim 3.

5. The aforementioned loading device further includes a restricting member, The regulating member is provided on the upper surface of the fixed rail device and, by contacting the side surface of the main frame device, guides the main frame device to move forward or backward. The loading device according to claim 4.

6. The aforementioned loading device further comprises a first locking device. In the first state, the state in which the main frame device extends along the front-rear axis is defined as the second state. In the first state described above, the state in which the main frame device has rotated clockwise from the second state, as viewed from the right, is defined as the third state. In the third state, the first locking device restricts the movement of the movable rail device so that the movable rail device cannot move forward relative to the fixed rail device by preventing the main frame device from contacting the first locking device. In the second state, the first locking device releases the restriction on the movement of the movable rail device so that the movable rail device can move forward relative to the fixed rail device by the main frame device contacting the first locking device. A loading device according to claim 1 or claim 2.

7. The aforementioned loading device further comprises a second locking device. The second locking device includes an operating device, a support member, a lever, and a projection. The aforementioned protrusion is provided on the main frame device, The state in which the movable rail device is positioned at the front end of the movable range of the movable rail device relative to the fixed rail device is defined as the fourth state. The lever is attached to the fixed rail device via the support member, and in the fourth state, is positioned behind the projection and in contact with the projection. When the user operates the control device, the lever moves to a position where, when viewed from the front, the lever does not overlap with the projection. A loading device according to claim 1 or claim 2.

8. At least a portion of the lower part of the rear surface of the vehicle body protrudes rearward from the upper part of the rear surface of the vehicle body. A loading device according to claim 1 or claim 2.

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