JP2977547B1 - Fire truck - Google Patents

Abstract

An object of the present invention is to provide a fire engine suitable for fire extinguishing activities on narrow roads by reducing the vehicle width by increasing the degree of freedom of arrangement of pipes for conveying a fire extinguishing fluid. A boom-side pipe (43) is swingably connected to a boom (3) supported by a vehicle body so as to swing about a swing shaft (22) along a lateral direction. One end of a first connection pipe 45 connected to the vehicle body side pipe 44 connected to the vehicle body side is rotatably connected to a center of a first shaft 91 parallel to the swing shaft 22 of the boom 3. The other end of the first connection pipe 45 is connected to one end of the second connection pipe 46 by the swing shaft 22 of the boom 3 and the first shaft 91.
Are connected so as to be relatively rotatable about a second shaft 92 which is parallel to. The other end of the second connection pipe 46 is connected to the boom side pipe 43.
The pivot shaft 22 of the boom 3 is rotatably connected to a center of a third shaft 93 parallel to the first shaft 91 and the second shaft 92.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire engine capable of jetting a fire-extinguishing fluid such as water from the end of a boom.

[0002]

2. Description of the Related Art A boom such as a ladder that is swingably supported by a vehicle body around a horizontal axis, a vehicle body-side pipe connected to the vehicle body side, and a boom-side pipe connected to the boom so as to be able to swing together. And a single connection pipe connected to the body side pipe and the boom side pipe, the boom side pipe is connected to one end of the connection pipe, and the other end of the connection pipe is connected to the body side pipe. Fire engines have been used in the past. A fire extinguishing operation is performed by a fluid such as water or a chemical carried by the pipe.

[0003]

Conventionally, the single connecting pipe rotates coaxially with the swing axis of the boom with respect to the pipe on the vehicle body side. Therefore, the single connecting pipe must be disposed on the left and right sides of the swing axis of the boom. there were. Then, there is a problem that the width of the fire engine becomes large and fire fighting on narrow roads is hindered.

Conventionally, as shown in FIG. 16A, a connection pipe 204 is supported in a cantilever manner by a support member 203 on a vehicle body side that supports a boom 201 at the center of a swing shaft 202. Alternatively, as shown in FIG.
The connection pipe 204 was supported at both ends by a pair of support members 203 and 205. However, when the connection pipe 204 is supported in a cantilever manner, the connection pipe 204 and the boom-side pipe 207 cannot be rocked stably with respect to the vehicle body-side pipe 208. 2
08, the strength of the connecting portion is reduced. Further, when the connection pipe 204 is supported at both ends, the width of the fire engine is further increased.

An object of the present invention is to provide a fire engine capable of solving the above-mentioned problems.

[0006]

A fire engine according to the present invention comprises a vehicle body, a boom supported by the vehicle body so as to be capable of swinging about a swing axis along a lateral direction, and a vehicle body side connected to the vehicle body side. A pipe, a boom-side pipe that is swingably connected to the boom, a first connection pipe that is connected to the vehicle-body-side pipe, and a second connection pipe that is connected to the boom-side pipe. One end of a first connection pipe is connected to the vehicle body side pipe so as to be relatively rotatable about a first axis parallel to the swing axis of the boom, and the other end of the first connection pipe is connected to one end of a second connection pipe.
The other end of the second connection pipe is connected to a boom-side pipe, and the other end of the second connection pipe is connected to a boom-side pipe, and the other end of the second connection pipe is connected to a boom-side pipe. The boom swings the boom so that the boom-side piping can swing about the swing shaft center with the boom swinging, and the second connection piping is the boom. Swingable about the third axis with respect to the side pipe and swingable about the second axis with respect to the first connection pipe, and the first connection pipe is centered on the first axis with respect to the body side pipe. It is characterized by being able to swing. According to the configuration of the present invention, the boom-side swing causes the boom-side pipe to swing together with the boom about the swing axis, and the second connection pipe swings about the third axis relative to the boom-side pipe. The first connection pipe swings about the first axis with respect to the vehicle body-side pipe with respect to the one connection pipe. Since the first connection pipe and the second connection pipe swing about an axis parallel to the swing axis of the boom, there is no need to arrange them on the left and right sides of the swing axis. This makes it possible to reduce the width of the fire engine and prevent fire-fighting activities on narrow roads from being hindered.

It is preferable that both ends of the first connection pipe are swingably supported about a first axis, and both ends of the second connection pipe are supported both swingably about a third axis. This allows
The first connection pipe, the second connection pipe, and the boom-side pipe can be rocked stably without increasing the overall width of the fire truck.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. A fire ladder truck 1 shown in FIG. 1 includes a ladder-type telescopic boom 3 and a vehicle body 2 supporting the boom 3. The vehicle body 2 is supported by front and rear wheels 4, 5,
A cabin 6 that covers the cab is attached to the front, and a turntable 7 that can be swiveled around the vertical axis is provided at the rear.

The boom 3 has four unit booms 3a,
3b, 3c, and 3d are vertically stacked so as to be relatively movable in the boom longitudinal direction. Each unit boom 3
a, 3b, 3c and 3d are relatively driven in the longitudinal direction with respect to each other by a known telescopic mechanism. Those unit boom 3
As in the prior art, a, 3b, 3c, and 3d are connected to each other via play in the up-down and left-right directions when the longitudinal direction is along the front-rear direction.

[0010] The boom 3 is a lowermost unit boom 3d.
And is swingably supported by the vehicle body 2.
That is, the lowermost unit boom 3d is connected to the receiving member 27.
Attached to. The receiving member 27 is supported by a support member 21 fixed on the turntable 7 via a support shaft 26. As shown in FIG. 7, the center of the support shaft 26 is the swing shaft 22 along the lateral direction. The support member 21 has a double-acting hydraulic cylinder 23
Are swingably connected to the center of the horizontal axis 24. The telescopic rod of the hydraulic cylinder 23 is
7 is swingably connected to the center of the horizontal axis 25. Thereby, the boom 3 is driven by the expansion and contraction drive of the hydraulic cylinder 23.
Swings about the center of the swing shaft 22, and the swing causes the tip of the boom 3 to move up and down. The swing shaft 22 extends in the left-right direction when the longitudinal direction of the boom 3 extends in the front-rear direction of the vehicle body.

As shown in FIG. 1, the uppermost unit boom 3
basket mounting frame 3 provided at the front end of a
The basket 30 is attached to a '. The basket 30 has a bottom plate 30a and a fence 30b surrounding the bottom plate 30a.

[0012] As shown in FIG.
Is mounted so as to be swingable around a support shaft 31 along a lateral direction perpendicular to the longitudinal direction of the boom 3 via a support bracket 34. That is, a pair of upper and lower hooks 30c and 30d is attached to the rear part of the fence 30b. The support bracket 34 is attached to the front end of the uppermost unit boom 3a.
It is attached to be able to swing around one. A pair of upper and lower pin-shaped receiving members 35a and 35b are attached to the support bracket. The baskets 30 are swingably supported by the boom 3 around the support shaft 31 by fitting the hooks 30c, 30d into the receiving members 35a, 35b from above. In addition, the downward displacement of the boom 3 with respect to the basket 30 allows the receiving members 35a and 35b to be pulled out from the hooks 30c and 30d, and the basket 30 to be detached from the boom 3. The axial directions of a first joint pipe 141, a second joint pipe 142, and a third joint pipe described later are along the vertical direction of the basket 30. Thereby, each joint piping 141, 1 of the boom 3 to the basket 30
The displacement of the basket 30 by the axial displacement of the
Can be removed from the boom 3.

The rod 32 a of the double-acting hydraulic cylinder 32 is connected to the support bracket 34 via a link 33. The link 33 is connected to the support bracket 34 and the rod 3
2a is swingably connected to the centers of shafts 33a and 33b parallel to the support shaft 31. The rod 32a and the link 33
The support shaft 31 is attached to the uppermost unit boom 3a via the link 36.
Is pivotably connected to a center of a shaft 36a parallel to. The tube of the hydraulic cylinder 32 is swingably connected to the uppermost unit boom 3a about the axis parallel to the support shaft 31. The floor surface of the basket 30 is held horizontally by the hydraulic cylinder 32 being expanded and contracted by the horizontal holding mechanism. As the horizontal holding mechanism, a known sensor having a sensor that detects the inclination of the bottom surface of the basket 30 from the horizontal and a control device that expands and contracts the hydraulic cylinder 32 according to the detected value can be used.

As shown in FIG. 1, a water discharge gun 40 is attached to the basket 30. The water gun 40
It is connected to a fire pump built in the vehicle body 2 via a flow path 41. The fire extinguishing fluid discharged by the fire pump is conveyed to the water discharge gun 40 through the flow path 41.

The flow path 41 is connected to the vehicle body side pipe 44 connected to the vehicle body 2, the boom side pipe 43 connected to the boom 3 so as to be able to swing, and is connected to the basket 30 so as to be able to swing together. A basket-side pipe 47, a first connection pipe 45 connected to the body-side pipe 44 as shown in FIG.
A second connection pipe 46 connected to the rear end of the boom-side pipe 43 and connected to the first connection pipe 45, and a connecting pipe 15 is connected to the front end of the boom-side pipe 43 as shown in FIG.
A first joint pipe 141 connected to the first joint pipe 141, a second joint pipe 142 connected to the basket-side pipe 47 thereof,
A third joint pipe 143 fitted to the first joint pipe 141 and the second joint pipe 142 is provided.

As shown in FIG. 2, the boom side piping 43
Are the first to fourth unit pipes 43a, 43b, 43c, 43
d is connected so as to be relatively movable in the longitudinal direction. Boom-side piping 4 with the expansion and contraction of the telescopic boom 3
3 so that each unit boom 3a, 3b, 3c,
Each of the unit pipes 43a, 43b, 43c, 43
d is connected.

The first unit pipe 43a is connected to the uppermost unit boom 3a via a first connecting member 48a. The second unit pipe 43b is connected to the second unit boom 3b at the second stage from the top.
It is connected via the connecting tool 48b. Third unit pipe 43c
The third connector 48c is attached to the unit boom 3c at the third stage from the top.
Are connected via. The fourth unit pipe 43d is connected to the lowermost unit boom 3d via a fourth connector 48d.

The unit booms 3b, 3c, 3d below the unit boom 3a at the top and the unit pipes 43b, 4b
In a state where the longitudinal direction of the boom 3 extends in the front-rear direction, the unit booms 3b, 3b
A play is provided to allow relative displacement of the unit pipes 43b, 43c, 43d with respect to c, 3d in the vertical and horizontal directions.

That is, the first connector 4 shown in FIGS.
8a is a first bracket 51 and the first bracket 5
1 and a second bracket 52 welded to the first bracket 52. The first bracket 51 is fixed to the basket mounting frame 3a 'of the uppermost unit boom 3a by a bolt 54 via a plate 53 welded to the frame 3a'. The second bracket 52 is connected to the first unit pipe 43.
a is fixed to the outer peripheral flange 43a 'by a bolt 55. Thereby, the first unit pipe 43a and the uppermost unit boom 3a are connected without play. That is, the play ΔD1 that allows the relative displacement in the left-right direction of the first unit pipe 43a and the uppermost unit boom 3a and the play ΔT1 that allows the relative displacement in the vertical direction are zero.

The second connector 48b shown in FIGS. 2 and 4 (1) and (2) has a first bracket 56 and a second bracket 57. The first bracket 56 is
A vertical wall 56a fixed to the unit boom 3b of the step by bolts and nuts via a plate 58 welded to a front end of the unit boom 3b; a horizontal wall 56b extending laterally from a lower end of the vertical wall 56a; The vertical wall 56a and the horizontal wall 56
b, and a rib 56c connected to b. The second bracket 57 is connected to the end flange 43 of the second unit pipe 43b.
b 'is welded to the outer periphery. Cylindrical collars 60 are respectively inserted into a pair of circular openings 56b 'formed in the lateral wall 56b.
Is inserted. The opening 56b 'and the axis of the collar 60 extend in the vertical direction with the longitudinal direction of the boom 3 extending in the horizontal direction. The outer diameter D1 of the collar 60 is
The thickness T1 of the collar 60 is larger than the thickness T2 of the lateral wall 56b. The collar 60 and the second bracket 57 are sandwiched via the washer 63 by the head 61 a of the bolt 61 inserted into the collar 60 and the second bracket 57 and the nut 62 screwed to the bolt 61. The outer diameter D opening 56b 'of the washer 63 is made larger than the inner diameter D2 of the washer 63, and the horizontal wall 56b is arranged between the washer 63 and the second bracket 57. Thereby, the difference between the outer diameter D1 of the collar 60 and the inner diameter D2 of the opening 56b 'becomes a play ΔD2 allowing the relative displacement of the second unit pipe 43b and the second unit boom 3b from the top in the left-right direction. .
The play ΔD2 is, for example, about 2 mm. The difference between the thickness T1 of the collar 60 and the thickness T2 of the lateral wall 56b becomes a play ΔT2 that allows relative displacement in the vertical direction between the second unit pipe 43b and the second unit boom 3b from the top.
The play ΔT2 is, for example, about 2 mm.

The third connector 48c shown in FIGS. 2 and 5 (1) and (2) has a first bracket 66 and a second bracket 67. The first bracket 66 is 3
A vertical wall 66a fixed to the unit boom 3c of the step by bolts and nuts via a plate 68 welded to a front end of the unit boom 3c; a horizontal wall 66b extending laterally from a lower end of the vertical wall 66a; The vertical wall 66a and the horizontal wall 66
b. The second bracket 67 is connected to the end flange 43 of the third unit pipe 43c.
It is fixed to the outer periphery of c 'by welding. Cylindrical collars 70 are inserted into a pair of circular openings 66b 'formed in the side wall 66b. The opening 66b 'and the collar 7
The 0 axis extends in the up-down direction when the longitudinal direction of the boom 3 extends in the lateral direction. The outer diameter D3 of the collar 70 is made smaller than the inner diameter D4 of the opening 66b '.
The thickness T3 of 0 is larger than the thickness T4 of the lateral wall 66b. The head 70 a of the bolt 71 inserted into the collar 70 and the second bracket 67 and the nut 72 screwed to the bolt 71 make the collar 70 and the second
The bracket 67 is sandwiched via the washer 73. The outer diameter of the washer 73 is the inner diameter D4 of the opening 66b '.
The horizontal wall 66b is disposed between the washer 73 and the second bracket 67. Thereby, the difference between the outer diameter D3 of the collar 70 and the inner diameter D4 of the opening 66b 'is different from the third unit pipe 43c and the third unit boom 3 from the top.
The play ΔD3 allows relative displacement of c in the left-right direction. The play ΔD3 is, for example, about 4 mm. The difference between the thickness T3 of the collar 70 and the thickness T4 of the lateral wall 66b is the third unit piping 43c and the third unit boom 3 from the top.
The play ΔT3 allows the relative displacement of c in the vertical direction. The play ΔT2 is, for example, about 4 mm.

The fourth connector 48d shown in FIGS. 2 and 6 (1) and (2) has a first bracket 76 and a second bracket 77. The first bracket 76 includes a pair of front and rear vertical walls 76 welded to the front end of the lowermost unit boom 3d.
a ', 76a "and a horizontal wall 76b whose front and rear ends are supported by both vertical walls 76a', 76a". The second bracket 77 is connected to the end flange 43 of the fourth unit pipe 43d.
It is welded to the outer periphery of d '. A pair of circular openings 76b 'formed in the side wall 76b are respectively provided with cylindrical collars 80.
Is inserted. The opening 76b 'and the axis of the collar 80 extend in the vertical direction with the longitudinal direction of the boom 3 extending in the horizontal direction. The outer diameter D5 of the collar 80 is
The inside diameter D6 of b ′ is smaller than the inside diameter D6, and the thickness T5 of the collar 80 is larger than the thickness T6 of the side wall 76b. The collar 80 and the second bracket 77 are sandwiched by the washer 83 by the head 81a of the bolt 81 inserted into the collar 80 and the second bracket 77 and the nut 82 screwed to the bolt 81. The outer diameter of the washer 83 is made larger than the inner diameter D4 of the opening 76b ', and the horizontal wall 76b is disposed between the washer 83 and the second bracket 77. Thereby, the difference between the outer diameter D5 of the collar 80 and the inner diameter D6 of the opening 76b 'becomes a play ΔD4 allowing the relative displacement of the fourth unit pipe 43d and the lowermost unit boom 3d in the left-right direction. The play ΔD4 is, for example, about 6 mm. Its color 80
Is the play ΔT4 that allows the vertical displacement of the fourth unit pipe 43d and the lowermost unit boom 3d in the vertical direction. The play ΔT
2 is, for example, about 6 mm.

The magnitude of the play at the connection between the lower unit boom and the unit pipe is greater than the play at the connection between the upper unit boom and the unit pipe. That is, the unit booms 3a, 3b, 3
c, 3d and play ΔD1, ΔD in the left-right direction at the connection between the unit pipes 43a, 43b, 43c, 43d.
2, ΔD3, ΔD4, and play ΔT1,
The following relational expressions (1) and (2) hold for ΔT2, ΔT3, and ΔT4. ΔD1 <ΔD2 <ΔD3 <ΔD4 (1) ΔT1 <ΔT2 <ΔT3 <Δ <4 (2)

Further, the value obtained by subtracting the play at the connecting portion between the upper unit boom and the unit pipe from the play at the connecting portion between the lower unit boom and the unit piping is the value obtained by subtracting the play at the connecting portion between the upper unit boom and the unit piping. It is more than the play between unit booms. That is, a play allowing relative displacement in the left-right direction between the uppermost unit boom 3a and the second unit boom 3b from the top is Δda, a play allowing a relative displacement in the vertical direction is ta, and a play allowing the relative displacement in the up-down direction is ta. Unit boom 3
Δdb, a play allowing relative displacement in the left-right direction between b and the third unit boom 3c from the top, tb is a play allowing relative displacement in the vertical direction, and a unit boom 3c, the third step from the top, and the bottom Assuming that a play allowing relative displacement in the horizontal direction with respect to the unit boom 3d is Δdc and a play allowing relative displacement in the vertical direction is tc, the following relational expressions (3), (4), (5), and (6) , (7), and (8) hold. Δda ≦ ΔD2-ΔD1 (3) Δdb ≦ ΔD3-ΔD2 (4) Δdc ≦ ΔD4-ΔD3 (5) Δta ≦ ΔT2-ΔT1 (6) Δtb ≦ ΔT3-ΔT2 (7) Δtc ≦ ΔT4-ΔT3 … (8)

According to the above configuration, the uppermost unit boom 3
play at the connection between each of the unit booms 3b, 3c, 3d at a lower level than the unit a and each of the unit pipes 43b, 43c, 43d.
By D2, ΔD3, ΔD4, ΔT2, ΔT3, ΔT4, each unit piping 43a, 43b, 43c, 43d based on the play Δda, Δdb, Δdc, Δta, Δtb, Δtc between the unit booms 3a, 3b, 3c, 3d. Mutual displacement and a difference in thermal expansion between the boom 3 and the pipe 43 can be absorbed, and damage to the pipe 43 can be prevented. The relative displacement amount of the uppermost unit boom 3a and the lowermost unit boom 3d is the cumulative amount of play Δ between the unit booms 3a, 3b, 3c, and 3d.
It corresponds to da + Δdb + Δdc and Δta + Δtb + Δtc. Therefore, by increasing the play at the connecting portion between the unit boom and the unit pipe toward the lower stage, that is, by satisfying the equations (1) and (2), each of the unit booms 3a, 3b, 3c, The displacement between the unit pipes 43a, 43b, 43c and 43d based on the accumulation of the play between the 3d can be effectively absorbed. In this case, the difference between the play at the connection between the lower unit boom and the unit pipe and the play at the connection between the upper unit boom and the unit pipe is the difference between the lower unit boom and the upper unit boom. The play between the unit booms 3b, 3c, and 3d and the unit pipes 43b, 43c, and 43d allows the play ΔD at the connection between the unit booms 3b, 3c, and 3d and the unit pipes 43b, 43c, and 43d.
2, ΔD3, ΔD4, ΔT2, ΔT3, ΔT4,
Cumulative play of play between each unit boom Δda + Δdb + Δd
c, all displacements based on Δta + Δtb + Δtc can be absorbed.

As shown in FIGS. 7 to 9, one end of the vehicle body side pipe 44 is connected to the fire extinguishing fluid supply side. That is, the vehicle body side pipe 44 is configured by connecting the straight portion 44a and the bent portion 44b having an L-shape in a side view. The straight portion 44a is connected to a fire pump built in the vehicle body 2 via a rotary connector 100. The support member 101 supporting the straight portion 44a is
Is provided on the turntable 7.

One end of a first connection pipe 45 is connected to the other end of the body side pipe 44 so as to be relatively rotatable about a first shaft 91 parallel to the swing shaft 22 of the telescopic boom 3. That is, as shown in FIG. 10, the first connection pipe 45 has a U-shape in a side view. At one end of the first connection pipe 45,
A bent portion 44b of the vehicle body side pipe 44 is fitted around the first shaft 91 so as to be relatively rotatable. A seal member 102, a stainless steel ball 103, and a grease storage groove 104 are provided between the first connection pipe 45 and the bent portion 44b.

The other end of the first connection pipe 45 is connected to one end of the second connection pipe 46 so as to be relatively rotatable about a second shaft 92 parallel to the swing shaft 22 of the telescopic boom 3 and the first shaft 91. Are linked. That is, as shown in FIG. 10, the second connection pipe 46 has a U-shape in side view. The other end of the first connection pipe 45 is connected to the second shaft 92 at one end of the second connection pipe 46.
It is fitted to the center so as to be relatively rotatable. A seal member 105, a stainless steel ball 106, and a grease storage groove 107 are provided between the first connection pipe 45 and the second connection pipe 46.

The other end of the second connection pipe 46 is provided at the rear end of the boom-side pipe 43 at the center of a third shaft 93 parallel to the swinging shaft 22, the first shaft 91 and the second shaft 92 of the telescopic boom 3. Are connected so as to be relatively rotatable. That is, the boom side pipe 4
The rear end of the third fourth unit pipe 43d is an L-shaped bent portion 43d 'in side view. The bent part 43d '
The other end of the second connection pipe 46 is fitted around the third shaft 93 so as to be relatively rotatable. A seal member 108, a stainless steel ball 109, and a grease storage groove 110 are provided between the second connection pipe 46 and the bent portion 43d '.

The first connection pipe 45 is supported at both ends so as to be swingable about a first shaft 91. That is, FIGS.
As shown in (1), a pair of arms 113a and 113b are attached to the beam 112 attached to the support member 21. The support shafts 114a, 114b are attached to the arms 113a, 113b via stoppers 115a, 115b. Its support shafts 114a, 11
4b are support holes 45 ', 44b' formed in the first connection pipe 45 and the bent portion 44b of the vehicle body side pipe 44 (FIG. 1).
0 (2)) is inserted so as to be relatively rotatable about the first shaft 91.

The second connection pipe 46 is pivotally supported at both ends about a third shaft 93. That is, FIGS.
As shown in FIG. 7, a pair of arms 117a and 117b are attached to a cylinder 116 fitted to the support shaft 26. The support shafts 118a and 118b are attached to the arms 117a and 117b via the stoppers 119a and 119b. Its support shafts 118a, 11
8b are support holes 46 ', 43d "formed in the rear end bent portion 43d' of the second connection pipe 46 and the fourth unit pipe 43d.
(See FIG. 10 (2).) Inserted around the third shaft 93 so as to be relatively rotatable.

According to the above configuration, as shown in FIG.
By the swing of the boom 3, the boom-side pipe 43 swings about the swing shaft 22 together with the boom 3, and the second connection pipe 46 swings about the third shaft 93 with respect to the boom-side pipe 43 and the first connecting pipe 46. The first connection pipe 45 swings about the first shaft 91 with respect to the vehicle body-side pipe 44 with respect to the connection pipe 45. The first connection pipe 45 and the second connection pipe 4
6 are axes 91, 92, 93 parallel to the swing axis 22 of the boom.
Since it swings to the center, it is not necessary to arrange it on the left and right of the swing shaft 22. This makes it possible to reduce the width of the fire engine and prevent fire-fighting activities on narrow roads from being hindered. The first connection pipe 45 is supported at both ends in a swingable manner about the first shaft 91, and the second connection pipe 46 is supported at both ends in a swingable manner about the third shaft 93. The first connection pipe 45, the second connection pipe 46, and the boom-side pipe 43 can be rocked stably without increasing the size.

As shown in FIGS. 12 to 14, behind the basket 30, the first joint pipe 141 is connected to the boom-side pipe 43 via a connecting pipe 151 so as to be relatively swingable around the support shaft 31. Is done.

That is, as shown in FIG. 13, the connecting pipe 151 has an L-shape in a side view. The front end of the first unit pipe 43a of the boom-side pipe 43 is a bent portion 43a 'having an L-shape in plan view. A bent portion 43a 'of the first unit pipe 43a is provided at one end of the connection pipe 151.
Are fitted around the support shaft 31 so as to be relatively swingable. One end side flange 141a of the straight tubular first joint pipe 141 is connected to the other end side flange 151a of the connection pipe 151 via bolts and nuts 146. The axis of the first joint pipe 141 extends vertically when the boom 3 extends horizontally. A support shaft 152 having its support shaft 31 as an axis is attached to the basket attachment frame 3a 'of the uppermost unit boom 3a. The support shaft 152 is inserted into a support hole 151 ′ provided in the connection pipe 151 so as to be relatively rotatable about the support shaft 31. This allows
The first joint pipe 141 is supported by the uppermost unit boom 3a via the connection pipe 151.

The second joint pipe 142 is a straight tube concentric with the first joint pipe 141 and is disposed below the first joint pipe 141. One end of the second joint pipe 142 faces the other end of the first joint pipe 141 via a gap δ. The dimension of the gap δ is determined so as to allow the displacement of the boom 3 for removing the basket 30. That is, before the gap δ disappears due to the displacement of the boom 3 with respect to the basket 30, the receiving members 35a, 35b are completely removed from the hooks 30c, 30d and the basket 30 is removed.
The size of the gap δ is determined so that the boom 3 can be removed from the boom 3. The dimension of the gap δ is, for example, about 50 mm. One end side flange 4a of the basket side pipe 47 is attached to the other end side flange 142a of the second joint pipe 142.
7a is connected via a bolt and a nut 147. The other end of the basket side pipe 47 is connected to the water discharge gun 40.

The first joint pipe 141 and the second joint pipe 1
The third joint pipe 143 having a straight pipe shape at 42 has a gap δ
And are fitted concentrically. The outer periphery of the first joint pipe 141 and the second joint pipe 142 and the third joint pipe 14
3, seal members 148 and 149 are interposed.

The first joint pipe 141 and the second joint pipe 1
Reference numeral 42 is connected by a connecting member 161 so that the connection can be released. Thereby, the first joint pipe 141 and the second joint pipe 142 can swing together around the support shaft 31.

That is, the connecting member 161 is composed of a plate-shaped connecting portion 161c and a pair of plate-shaped sandwiching portions 161a, 161.
b. One end flange 141a of the first joint pipe 141 and the other end flange 142 of the second joint pipe 142
A male screw 163 parallel to the support shaft 31 is embedded in a.
The male screw 163 penetrates the connecting portion 161c. By connecting the connecting wing nut (screw member) 162 to the male screw 163, the connecting member 161 is connected to the first joint pipe 14.
It is attached to the first and second joint pipes 142. The wing nut 162 can be directly rotated by hand. By removing the wing nut 162 from the screw 163, the connecting member 161 is connected to the first joint pipe 141 and the second joint pipe 142.
Can be removed from.

The sandwiching portion 161 of the connecting member 161
a, 161b are the other end flanges 151 of the connecting pipe 151;
a, one end side flange 141a of the first joint pipe 141
And the other end side flange 142a of the second joint pipe 142,
One end side flange 47a of the basket side pipe 47 is sandwiched from the radial direction of the joint pipes 141 and 142 in a plane orthogonal to the support shaft 31. Thereby, the connecting member 161
The rotational force around the support shaft 31 through the first joint pipe 141
Can be transmitted to the second joint pipe 142.

The third joint pipe 143 is connected to the connecting member 17.
1, the connection is releasably connected to the first joint pipe 142. Thereby, the first joint pipe 143 of the first
The axial movement of the joint pipe 142 and the second joint pipe 142 can be prevented. That is, the connection member 171
Are a plate-shaped connecting portion 171c and a pair of plate-shaped sandwiching portions 171.
a, 171b. A male screw 173 is embedded in one end side flange 141a of the first joint pipe 141. The male screw 173 passes through the connection portion 171c. By connecting the connecting wing nut (screw member) 172 to the male screw 173, the connecting member 171 is connected to the first joint pipe 141.
Attached to. The wing nut 172 can be directly rotated by hand. The wing nut 172 is screwed 173
By removing the connection member 171 from the first joint pipe 141, the connection member 171 can be removed. The connecting member 17
1 is connected to the first joint pipe 141 via the other end side flange 151a of the connection pipe 151.
And the one end flange 143a of the third joint pipe 143 are sandwiched from the axial direction.

As shown in FIG. 15, the third joint pipe 1
43 is the first joint pipe 142 until the gap δ is exposed by releasing the connection by the connecting member 171.
And the second joint pipe 142 can be moved in the axial direction.

According to the above configuration, the connection of the third joint pipe 143 to the first joint pipe 141 is released, and the third joint pipe 143 is connected to the first joint pipe 141 and the second joint pipe 142 by the shaft. In the first joint pipe 1
The gap δ between the first joint 41 and the second joint pipe 142 can be exposed. That is, the gap δ can be easily exposed.
Therefore, if the connection of the first joint pipe 141 and the second joint pipe 142 by the connecting member 161 is released, the basket 30
The boom 3 is relatively displaced with respect to
Can be removed from the boom 3.

The first joint pipe 141 and the second joint pipe 1
42 is connected so as to be able to swing around the support shaft 31 via the connecting member 161, so that the basket 3 is connected to the boom 3.
When 0 swings, the connecting member 161 can prevent the first joint pipe 141 and the second joint pipe 142 from shifting from each other in the radial direction. The connection member 161 can be attached to the first joint pipe 141 only in a strength necessary for preventing the connection member 161 from falling off, so that the connection member 161 can be easily removed. The connecting member 161 is connected to the first joint pipe 141.
And the second joint pipe 142 are sandwiched from the radial direction in the plane orthogonal to the support shaft 31, so that the first joint pipe 141 and the second joint pipe 142 are displaced from each other in the radial direction.
Can be reliably prevented. Further, the connecting member 161
Attachment and removal of the wing nut 162 can be performed simply by manually rotating the wing nut 162 manually, so that the tightening operation and the loosening operation can be easily performed.

The connecting member 171 is connected to the first joint pipe 14.
Since the first joint pipe 143 and the third joint pipe 143 can be sandwiched from the axial direction, it is possible to reliably prevent the third joint pipe 143 from accidentally moving in the axial direction with respect to the first joint pipe 141 and the second joint pipe 142. Further, the attachment and detachment of the connecting member 171 can be performed simply by manually rotating the wing nut 172 manually, so that the tightening operation and the loosening operation can be easily performed.

The present invention is not limited to the above embodiment. For example, the fire extinguishing fluid is not limited to water. Further, the number of unit booms and unit pipes is not limited. In the above embodiment, the water spray gun is attached to the basket, but may be attached directly to the boom. Further, the form of the boom is not limited to the ladder type.

[0046]

According to the present invention, it is possible to provide a fire engine suitable for fire-extinguishing activities on narrow roads by reducing the vehicle width by increasing the degree of freedom in arranging piping for conveying a fire-extinguishing fluid.

[Brief description of the drawings]

FIG. 1 is a side view of a ladder vehicle according to an embodiment of the present invention.

FIG. 2 is a side view of a main part on a front end side of a boom-side pipe according to the embodiment of the present invention.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

4A is a sectional view taken along line IV-IV in FIG. 2, and FIG. 4B is a sectional view of a main part of FIG.

5A is a sectional view taken along line VV in FIG. 2, and FIG. 5B is a sectional view of a main part of FIG.

6A is a cross-sectional view taken along the line VI-VI in FIG. 2, and FIG. 6B is a cross-sectional view of a main part of FIG.

FIG. 7 is a side sectional view of a main part in a connection portion between a boom-side pipe and a vehicle-body-side pipe according to the embodiment of the present invention.

FIG. 8 is a plan view of a main part in a connection portion between the boom-side piping and the vehicle-body-side piping in the embodiment of the present invention.

FIG. 9 is a rear view of a main part in a connection portion between the boom-side piping and the vehicle-body-side piping in the embodiment of the present invention.

FIG. 10 shows a connection pipe (1) according to the embodiment of the present invention.
Is a plan view of a half, (2) is a front sectional view, and (3) is a bottom view of a half.

FIG. 11 is a diagram illustrating the operation of the connection pipe according to the embodiment of the present invention.

FIG. 12 is a partially cutaway side view of the joint pipe according to the embodiment of the present invention.

FIG. 13 is a front view in which a half of the joint pipe according to the embodiment of the present invention is broken.

14 is a sectional view taken along line XIV-XIV of FIG.

FIG. 15 is an explanatory diagram of an operation of the joint pipe according to the embodiment of the present invention.

FIG. 16 is a diagram showing one example of a conventional pipe (2).
Is a diagram showing another example

[Explanation of symbols]

 2 vehicle body 3 boom 3a, 3b, 3c, 3d unit boom 22 swing shaft 30 basket 31 support shaft 43 boom side piping 43a, 43b, 43c, 43d unit piping 44 body side piping 45 first connection piping 46 second connection piping 47 Basket side piping 91 First shaft 92 Second shaft 93 Third shaft 141 First joint piping 142 Second joint piping 143 Third joint piping 161 Connection member 162 Wing nut (connection screw member) 171 Connection member 172 Wing nut (connection ΔD1, ΔD2, ΔD3, ΔD4 Left and right play ΔT1, ΔT2, ΔT3, ΔT4 Up and down play δ Gap

Claims (2)

(57) [Claims] 1. A vehicle body, a boom supported by the vehicle body so as to be capable of swinging about a swing axis along a lateral direction, a body side pipe connected to the vehicle body side, and a swingable accompanying the boom. A boom-side pipe to be connected, a first connection pipe connected to the body-side pipe, and a second connection pipe connected to the boom-side pipe, one end of the first connection pipe being connected to the body-side pipe. The first connection pipe is connected to a first axis center parallel to the swing axis of the boom so as to be relatively rotatable, and the other end of the first connection pipe is connected to one end of a second connection pipe. The other end of the second connection pipe is connected to a boom-side pipe at a third axis parallel to the swing axis, the first axis, and the second axis of the boom. It is connected to the center so that it can rotate relatively, and the boom swings, the boom-side piping swings with the boom The second connection pipe is swingable about the third axis with respect to the boom-side pipe, and the first connection pipe is swingable about the axis.
A fire engine wherein the connection pipe is swingable about a second axis and the first connection pipe is swingable about the first axis with respect to the vehicle body-side pipe. 2. The first connection pipe according to claim 1, wherein both ends of the first connection pipe are swingably supported about a first axis, and both ends of the second connection pipe are swingably supported about a third axis. Fire truck.