JPH0972178A - Ladder truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ladder truck capable of making smooth fire fighting operation by making it possible to displace and return a bearing position outward from a ladder truck body, and moving an expandable ladder with front end oscillating up and down at a specific oscillation angle along the wall surface of a building. SOLUTION: A ladder truck is equipped with an expandable ladder 3 borne on a truck body 2 in a turnable manner so that the front end makes up and down motion, and the maximum oscillation angle is larger than 90 deg., provided it is 0 deg. when the longitudinal direction is in parallel with the horizontal direction. An angle of the longitudinal direction of an auxiliary ladder 50 provided between the truck body 2 side and ladder 3 side to the horizontal direction is less than 90 deg. when an oscillation angle of the ladder 3 is larger than 90 deg.. Ascending and descending between the body 2 side and ladder 3 side are made by means of the auxiliary ladder 50. By the constitution, obstacles such as aerial wire, street trees, etc., are eliminated, and the front end of the ladder 3 makes up and down motion along the wall surface of a building to perform smoothly fire fighting operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder vehicle, and more particularly to a ladder vehicle suitable for firefighting activities on middle and low-rise buildings.

[0002]

2. Description of the Related Art A conventional ladder vehicle 101 shown in FIG. 10 includes a vehicle body 102 and an extendable ladder 103, and the ladder 103 is centered on a horizontal axis 104 with respect to the vehicle body 102 so that its tip moves up and down. It is possible to swing. The ladder 103
Is set to, for example, about -10 degrees to about 75 degrees when the longitudinal direction is parallel to the horizontal direction, and the maximum swing angle does not become 90 degrees or more.

[0003]

When a conventional ladder truck 101 performs a fire fighting operation on the middle and low-rise areas of a building 105, a power transmission line is required to move the tip of the ladder 103 up and down along the wall surface of the building 105. There is a problem in that an overhead wire 106 such as a telephone line and a telephone line, a street tree, and the like interfere with the ladder 103, and the vertical movement thereof is disturbed, and firefighting activities such as rescue of lives and firefighting activities are hindered.

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

[0005]

SUMMARY OF THE INVENTION The present invention relates to a ladder car having a vehicle body and a telescopic ladder supported by the vehicle body so as to be able to swing up and down at the tip thereof. Is characterized by being 90 degrees or more, with the case where the longitudinal direction runs along the horizontal direction as zero degrees.

[0006] It is preferable that the supporting portion of the ladder can be displaced and returned outward from the vehicle body.

It is preferable that a moving member is attached to the vehicle body so as to be linearly displaceable and returnable in a direction outward from the vehicle body, and the ladder is supported by the vehicle body via the moving member.

The ladder is supported by a vehicle body via a link mechanism. The link mechanism has a first link and a second link, and the ends of each link are parallel to the vehicle body and the ladder side. The first link has a larger end-to-end distance than the second link, and the ladder-side end of the first link is closer to the tip of the ladder than the ladder-side end of the second link. The ladder is swung so that the tip moves up and down by the swing of each link, and with the swing of the ladder, the ladder side end of each link can be displaced and returned outward from the vehicle body. Is preferred.

[0009] An auxiliary ladder is provided between the vehicle body side and the ladder side, and the auxiliary ladder is connected to the vehicle body side and the ladder side so as to swing with the swing of the ladder. When the angle is 90 degrees or more, the angle formed by the longitudinal direction of the auxiliary ladder with respect to the horizontal direction is preferably less than 90 degrees.

[0010]

According to the ladder vehicle of the present invention, the maximum swing angle of the telescopic ladder is set to 90 degrees or more, with the case where the longitudinal direction is parallel to the horizontal direction being 90 degrees or more. It can expand and contract along the wall of an object.
Thus, the tip of the ladder can be moved up and down along the wall surface of the building without being disturbed by an aerial wire or a roadside tree, so that firefighting activities can be performed smoothly.

The maximum swing angle of the ladder preferably exceeds 90 degrees. This allows the tip of the ladder to approach the building even when the distance between the supporting point of the ladder and the building is large by swinging the ladder beyond 90 degrees after extending it, Firefighting activities can be carried out smoothly.

By displacing the support portion of the ladder outward from the vehicle body, even if the vehicle body cannot be approached by the sidewalk guardrail or the like, the support portion of the ladder can be moved more than the aerial overhead line or the like. , And the tip of the ladder can be moved up and down along the wall of the building without being obstructed by an aerial wire or the like.

By returning the supporting portion of the ladder displaced to the outside of the vehicle body to the original position, it is possible to prevent the ladder from interfering with an obstacle or the like during traveling of the vehicle.

[0014] The ladder is supported by the vehicle body via a moving member capable of linearly displacing and returning outward from the vehicle body, so that the displacement of the moving member allows the ladder to be supported at a location higher than that of the aerial overhead line. Can be approached.

Each end of the first link and the second link are rotatably connected to the vehicle body side and the ladder side about a horizontal axis parallel to each other, and the first link is longer than the second link. By arranging the ladder side end of the first link closer to the tip of the ladder than the ladder side end of the second link, it is possible to swing the ladder so that the tip moves up and down by swinging of each link. In addition, the ladder-side end of each link can be displaced and returned outward from the vehicle body with the swing of the ladder. As a result, the ladder-side end of each link serves as a ladder support point, so that at the same time as the ladder swings, the ladder support point can be made closer to the building than an aerial overhead line or the like.

The end of each link of the link mechanism on the vehicle body side is connected to a movable member capable of linearly displacing and returning outwardly from the vehicle body, so that the support portion of the ladder is moved along with the movement of the movable member and each link. Swinging makes it possible to approach the building more than an aerial wire.

By making the angle between the longitudinal direction of the auxiliary ladder disposed between the vehicle body side and the ladder side with respect to the horizontal direction less than 90 degrees when the swing angle of the ladder is 90 degrees or more, Traffic between the vehicle body side and the ladder side can be easily performed using the auxiliary ladder.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

The fire ladder truck 1 shown in FIGS. 1 and 2 includes a vehicle body 2 and a telescopic ladder 3 supported by the vehicle body 2. The vehicle body 2 is supported by front and rear wheels 4 and 5, a cabin 6 that covers a cab is attached to a front portion, and a turntable 7 that can rotate about a vertical axis is provided at a rear portion. Further, the vehicle body 2 can be supported by outriggers 8 and 9.

The ladder 3 has a fixed unit ladder 3a and a plurality of movable unit ladders 3b, 3c, 3d. As shown in FIG. 2, each of the unit ladders 3a, 3b, 3c and 3d has a rectangular frame shape as viewed from the rear, and a first unit ladder 3a is provided inside the fixed unit ladder 3a.
Of the second movable unit ladder 3c is fitted movably in the longitudinal direction, and the second movable unit ladder 3c is fitted movably in the longitudinal direction inside the first movable unit ladder 3b. A third movable unit ladder 3d is fitted inside so as to be movable in the longitudinal direction. In this specification, the longitudinal direction of the ladder 3 is defined as the front-back direction.

As shown in FIG. 3, the first movable unit ladder 3
A wire 11 wound around a pulley 10 attached to the front and rear portions of the movable unit ladder 3b is connected to a front portion of the fixed unit ladder 3a and a rear portion of the second movable unit ladder 3c. A wire 13 wound around a pulley 12 attached to the part is connected to a front part of the first movable unit ladder 3b and a rear part of the third movable unit ladder 3d.
A single-acting hydraulic cylinder 15 is attached to the fixed unit ladder 3a, and the telescopic rod 15a of the hydraulic cylinder 15 is connected to the first movable unit ladder 3b. Thereby, when the hydraulic cylinder 15 is extended, all the movable unit ladders 3b, 3c, 3d advance from the fixed unit ladder 3a, and when the hydraulic cylinder 15 is contracted and the first movable unit ladder 3b is moved backward, the other The movable unit ladders 3c and 3d can be moved backward by gravity.

As shown in FIG. 4, the third movable unit ladder 3
A pair of left and right handrails 3f are attached to the tip of d, and swing in the direction indicated by the arrow in FIG. 4 so that they can be stored without interfering with the cabin 6 during traveling.
It is foldable as shown by a two-dot chain line.

The ladder 3 is swingably supported by the vehicle body 2 so that its tip moves up and down. As shown by the two-dot chain line in FIG. 5, the maximum swing angle θ of the ladder 3 is The angle along the horizontal direction is 90 degrees or more as zero degrees, and is 116 degrees in the present embodiment.

The ladder 3 is supported by the vehicle body 2 via a moving member 21 and a link mechanism 22.

As shown in FIGS. 2, 6 to 8, the moving member 21 has a frame shape, and includes left and right side walls 21a and 21b,
A rear wall 21c connecting the rear ends of the side walls 21a and 21b;
Intermediate wall 21d connecting front and rear sides 21a, 21b
And is attached to the turntable 7 so as to be able to reciprocate along the direction from the vehicle body 2 to the outside. That is, the turntable 7 has a frame shape,
As shown in FIG. 2, a left-right guide member 7a having a U-shape in rear view,
7b, an intermediate plate 7c for connecting the front and rear of the two guide members 7a and 7b as shown in FIG.
and a front wall 7d connecting front ends of the guide members 7a and 7b, and a moving member 21 is inserted between the guide members 7a and 7b via a pad 23 so as to be able to move back and forth. As shown in FIGS. 6 and 7, the telescopic rod of the hydraulic cylinder 24 is connected to the intermediate wall 21d of the moving member 21 so as to be rotatable around the left and right horizontal shafts 24a. Is connected to the front wall 7d so as to be rotatable about the left and right horizontal axis 24b. Thus, the moving member 21 can be linearly displaced and returned outward from the vehicle body 2 by expanding and contracting the hydraulic cylinder 24. The body 2 is located below the turntable 7.
A ring gear 26 is attached to a fixed side of the turntable 7, and a pinion 27 meshing with the ring gear 26 is
Attached to the output shaft of the motor 28 attached to the
Thus, the turntable 7 can be rotated by driving the motor 28.

As shown in FIGS. 2, 6 to 8, the link mechanism 22 has a first link 31 and a second link 32. Each of the links 31 and 32 has a frame shape as shown in FIG. 2, and is configured by connecting two left and right members by a horizontal rail. As shown in FIG. 7, the upper end of the first link 31 is rotatably connected to the support frame 3a 'of the fixed unit ladder 3a about the left and right horizontal axis 31a. The lower end of the first link 31 is connected to the rear wall 21c of the moving member 21.
And a connecting member 21e connecting the inner wall 21d and the intermediate wall 21d. The upper end of the second link 32 has the support frame 3 of the fixed unit ladder 3a.
a 'is rotatably connected to the left and right horizontal axis 32a. The lower end of the second link 32 is connected to the moving member 21.
Is connected to the rear wall 21c so as to be rotatable about the left and right horizontal axis 32b. The first link 31 has a larger end-to-end distance than the second link 32, and both ends of the first link 31 are disposed closer to the tip of the ladder than both ends of the second link 32. In front of the first link 31, the telescopic rod of the hydraulic cylinder 35 is connected to the support frame 3 a ′ of the fixed unit ladder 3 a so as to be rotatable about the left and right horizontal axes 35 a, and the cylinder tube of the hydraulic cylinder 35 is The left and right horizontal shafts 35b are rotatably connected to the intermediate wall 21d. Thereby, the hydraulic cylinder 35
The links 31 and 32 swing by expanding and contracting, and the ladder 3 swings so that the tip moves up and down by the swing of the links 31 and 32. With the swing of the ladder 3, each link 3
The ladder-side end portions 1 and 32 can be displaced and returned outward from the vehicle body 2. Note that, as shown in FIG. 8, a column 41 that supports the front end of the fixed unit ladder 3a in the running state is attached to the vehicle body.

As shown in FIG. 8, an auxiliary ladder 50 is arranged between the vehicle body side and the ladder side. The vehicle-side end of the auxiliary ladder 50 is connected to the moving member 21 so as to be rotatable about the left and right horizontal axis 51. The ladder side end of the auxiliary ladder 50 is connected to a guide 52 attached to the support frame 3a 'of the fixed unit ladder 3a so as to be movable in the longitudinal direction of the ladder 3 and rotatable about a horizontal axis 53 on the left and right sides. Accordingly, the auxiliary ladder 50 swings with the swing of the ladder 3, and as shown by the two-dot chain line in FIG. 8, when the swing angle of the ladder 3 is 90 degrees or more, the longitudinal direction of the auxiliary ladder 50 is changed. The angle α formed with the horizontal direction is less than 90 degrees.

According to the ladder car 1, the maximum swing angle θ of the ladder 3 is set to 90 degrees or more, with the case where the longitudinal direction extends along the horizontal direction being set to zero degree or more, so that the ladder 3 is placed along the wall surface of the building. Can expand and contract. As a result, FIG.
As shown by the two-dot chain line, the tip of the ladder 3 can be moved up and down along the wall surface of the building 105 without being obstructed by the aerial wire 106 or the like, and the firefighting activity can be performed smoothly. In addition, the length of the ladder 3 in the most contracted state is determined by setting the swing angle to 9 in the most contracted state.
When the angle is set to 0 degrees, it is set so as not to interfere with the aerial wire 106. Also, in the above embodiment, the maximum swing angle θ of the ladder 3 exceeds 90 degrees, so even if the distance between the support portion of the ladder 3 and the building 105 is large, 90
By swinging more than one degree, the tip of the ladder 3
05 can be approached, and fire fighting activities can be carried out smoothly.

By moving the moving member 21 outward from the vehicle body 2, the supporting part of the ladder 3 is displaced outward from the vehicle body 2, and the vehicle body 2 is displaced by the guard rail 108 of the sidewalk 107 or an obstacle. Even when the building cannot be approached to the building 105, the supporting portion of the ladder 3 can be made closer to the building 105 than the aerial wire 106 or the like. Further, as the swing angle of the ladder 3 increases, the ladder-side ends of the links 31 and 32 of the link mechanism 22 are displaced outward from the vehicle body 2. Can be brought closer to the building 105 than the aerial wire 106 or the like. Therefore, even if such a guardrail 108 or the like exists, the aerial overhead line 106
The tip of the ladder 3 is not disturbed by the building 10
5 can be moved up and down along the wall, and firefighting activities can be performed smoothly.

The moving member 21 that has moved outward from the vehicle body 2 is moved in the opposite direction, and the swing angle of the ladder 3 is reduced, so that the ladder 3 displaced outward from the vehicle body 2.
Can be returned to the original position, thereby preventing the ladder 3 from interfering with an obstacle or the like while the ladder car 1 is traveling.

When the swing angle of the ladder 3 is 90 degrees or more, the auxiliary ladder 50 disposed between the vehicle body side and the ladder side.
The angle between the longitudinal direction and the horizontal direction is less than 90 degrees, so that the traffic between the vehicle body side and the ladder side can be easily performed using the auxiliary ladder 50.

As shown in FIG. 9, a hydraulic cylinder 61 is attached to the rear end of the moving member 21 to extend the hydraulic cylinder 61 when the support of the ladder 3 is displaced outward from the vehicle body 2. By grounding the tip, the bending of the outer end of the moving member 21 is restricted, and the ladder 3 can be prevented from swinging in the vertical direction.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, both the moving member 21 and the link mechanism 22 are provided. However, the supporting portion of the ladder 3 may be displaced outward from the vehicle body 2 and returned by either one. Further, a water spray gun or the like may be attached to the tip of the ladder 3.

[Brief description of drawings]

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

FIG. 2 is a rear view of the ladder vehicle according to the embodiment of the present invention.

FIG. 3 is a configuration explanatory view of a ladder of the ladder vehicle according to the embodiment of the present invention.

FIG. 4 is a configuration explanatory view of a handrail at the tip of a ladder of the ladder vehicle according to the embodiment of the present invention.

FIG. 5 is a partial side view for explaining the operation of the ladder vehicle according to the embodiment of the present invention.

FIG. 6 is a partial sectional view for explaining the operation of the moving member of the ladder vehicle according to the embodiment of the present invention.

FIG. 7 is a plan view for explaining the operation of the moving member of the ladder vehicle according to the embodiment of the present invention.

FIG. 8 is a side view for explaining the operation of the link mechanism of the ladder vehicle according to the embodiment of the present invention.

FIG. 9 is a diagram for explaining the operation of the ladder vehicle according to the embodiment of the present invention.

FIG. 10 is an explanatory view of a conventional ladder car.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ladder car 2 Body 3 Ladder 21 Moving member 22 Link mechanism 31 First link 32 Second link 50 Auxiliary ladder

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisanori Amano 3-14-1, Nakahara, Mitaka City, Tokyo Inside the Fire Service Agency (72) Inventor Haruki Nishi 3-14-1, Nakahara, Mitaka City, Tokyo Firefighters Office of National Defense Agency (72) Inventor Masayuki Yoshioka, 5-5-20, Koji Higashi, Ikuno-ku, Osaka Prefecture Morita Pump Co., Ltd. (72) In-house Junji Inamoto, 5-5, Koji Higashi, Ikuno-ku, Osaka, Osaka No. 20 Morita Pump Co., Ltd.

Claims (5)

[Claims] 1. A ladder truck having a vehicle body and a telescopic ladder supported by the vehicle body so as to swing up and down at the tip thereof, the maximum swing angle of the ladder is such that the longitudinal direction is horizontal. A ladder car characterized by being 90 degrees or more with zero degree along the way. 2. The supporting point of the ladder is capable of being displaced and returned outward from the vehicle body.
The ladder car described in. 3. The vehicle body according to claim 2, wherein a moving member is attached to the vehicle body so as to be linearly displaceable and returnable in a direction outward from the vehicle body, and a ladder is supported by the vehicle body via the moving member. The ladder car described. 4. The ladder is supported by a vehicle body via a link mechanism, and the link mechanism has a first link and a second link, and ends of each link are parallel to the vehicle body side and the ladder side. The first link has a longer end-to-end distance than the second link and is rotatably connected to the center of the horizontal axis.
The ladder-side end of the link is disposed closer to the tip of the ladder than the ladder-side end of the second link, and the swing of each link causes the ladder to swing so that the tip moves up and down. 4. The ladder vehicle according to claim 2, wherein the ladder-side end of each link can be displaced and returned outward from the vehicle body. 5. An auxiliary ladder disposed between the vehicle body side and the ladder side, wherein the auxiliary ladder is connected to the vehicle body side and the ladder side so as to swing along with the swing of the ladder. The angle formed between the longitudinal direction of the auxiliary ladder and the horizontal direction is less than 90 degrees when the swing angle is 90 degrees or more.
A ladder truck according to any one of the above.