Water discharge device

Abstract

To provide a water discharge device having a simple structure and not requiring electrical control. [Solution] The device comprises a water-discharging means 4, a rotating shaft 3, a support 2 that rotatably supports the rotating shaft 3, and a rotating body 5 that is attached to the rotating shaft 3 and fixes the water-discharging means 4, the water-discharging means 4 being fixed to one side of the rotating body 5, and the other side of the rotating body 5, the rotating shaft 3, being a weight of the weight 7, when the support 2 is positioned vertically, with the water-discharging means 4 located on the upper side and the weight 7 located on the lower side, and when water is discharged by the water-discharging means 4, the rotation of the rotating body 5 due to the water-discharge reaction force is counteracted by the weight of the weight 7.

Description

[Technical Field]

[0001] The present invention relates to a water-discharging device that can stably discharge water to a target position. [Background technology]

[0002] Firefighting and cleaning operations are carried out by spraying water from a water cannon. When a water cannon is used, a water cannon reaction force is generated. If a water cannon is used without any countermeasures against the water cannon reaction force, not only will the water cannon become unstable, but it will also be difficult to spray water at the target location. To prevent these problems, a water cannon is known that is equipped with an attitude adjustment mechanism and is remotely controlled to control the change in attitude caused by the water cannon reaction force. However, such a water cannon requires not only a control mechanism but also many nozzles, resulting in a complex structure and the difficulty of controlling each nozzle.

[0003] In this regard, the fluid ejection device described in Patent Document 1 has a pair of ejection nozzles, an attitude sensor capable of detecting the tilt of the rotary ejection body around the rotation axis, and an attitude control unit connected to the pair of ejection nozzles and the attitude sensor, where the pair of ejection nozzles are rotatably mounted in symmetrical positions with respect to a mid-plane including the rotation axis of the rotary ejection body, and each ejection nozzle is configured to rotate according to the tilt of the rotary ejection body detected by the attitude sensor. This configuration makes it possible to control the movement of the cord-like body (such as a hose) with a relatively simple structure, and can achieve weight reduction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-186397 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the fluid ejection device described in Patent Document 1 is controlled by an attitude control unit in accordance with the detection value of an attitude sensor, and still has a complicated structure and requires electrical control.

[0006] SUMMARY OF THE INVENTION In view of the above background, an object of the present invention is to provide a water discharge device that has a simple structure and does not require electrical control. [Means for solving the problem]

[0007] In order to achieve the above object, the water-discharging device of the present invention comprises a water-discharging means, a rotating shaft, a support that rotatably supports the rotating shaft, and a rotating body that is attached to the rotating shaft and fixes the water-discharging means, wherein the water-discharging means is fixed to one side of the rotating shaft of the rotating body, and the other side of the rotating shaft of the rotating body forms a weight portion, and the weight of the weight portion is such that when the support body is arranged vertically, the water-discharging means is located on the upper side and the weight portion is located on the lower side, and when water is discharged by the water-discharging means, the rotation of the rotating body due to the water-discharge reaction force is canceled out by the weight of the weight portion. [Effects of the Invention]

[0008] According to the water-discharging device of the present invention, the action of the rotor prevents the water-discharging means from tilting due to the water-discharge reaction force, and therefore prevents the water-discharge reaction force from acting directly on the support body. Therefore, it is possible to stably support the support body without supporting it with more force than necessary or fixing it with a structure that is stronger than necessary, and it is possible to stably discharge water to the target position. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a main part of a water-discharging device according to an embodiment of the present invention. [Figure 2] FIG. 10 is a perspective view showing a main part of a water-discharging device according to a comparative example. [Figure 3] FIG. 3 is a side view of the water-discharging device shown in FIG. 2. [Figure 4] FIG. 2 is a side view of the water-discharging device shown in FIG. 1. [Figure 5] FIG. 5 is a side view showing the water-discharging device shown in FIG. 4 in a state where water is being discharged. [Figure 6] FIG. 1 is a side view showing a state in which an operator is holding and using the water-discharging device according to one embodiment of the present invention. [Figure 7] 1 is a side view showing a state in which a water-discharging device according to an embodiment of the present invention is installed on a fire engine and in use. [Figure 8] 2 is a perspective view of an embodiment in which the arrangement of the support body is changed from that of the water-discharging device of FIG. 1. FIG. [Figure 9] 1 is a side view showing a state in which the water-discharging device according to an embodiment of the present invention is used while being suspended from above. [Figure 10] FIG. 2 is a perspective view showing another example of the weight shown in FIG. 1. [Figure 11] FIG. 10 is a perspective view showing another embodiment of the water discharge device. [Figure 12] FIG. 10 is a perspective view showing yet another embodiment of the water-discharging device. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described below with reference to the drawings. First, an overview of a water-discharging device according to one embodiment of the present invention will be described with reference to FIG. 1. FIG. 1 is a perspective view showing the main parts of a water-discharging device 1 according to one embodiment of the present invention. FIG. 1 illustrates a state in which a long support body 2 is arranged vertically. A rotation shaft 3 is supported horizontally on the support body 2. The support body 2 supports a rotor 5 to which a water-discharging means 4 is fixed via the rotation shaft 3. The rotation shaft 3 is rotatable relative to the support body 2.

[0011] The water discharge means 4 has branch hoses 4b and 4c branching from a main hose 4a, and liquid such as water is discharged from the tips of the branch hoses 4b and 4c (arrow a). The water discharge means 4 in Fig. 1 is an example, and a configuration in which water is discharged from a single hose without the branch hoses 4b and 4c may also be used.

[0012] The rotating body 5 is attached to the rotating shaft 3 and can rotate integrally with the rotating shaft 3. The rotating body 5 has a fixed portion 6, and for convenience, one side (upper side) of the rotating shaft 3 of the fixed portion 6 is referred to as the first fixed portion 6a, and the other side (lower side) of the rotating shaft 3 is referred to as the second fixed portion 6b. The water-discharging means 4 is fixed to the first fixed portion 6a, and the weight 8 is fixed to the second fixed portion 6b. For convenience, the second fixed portion 6b and the weight 8 are collectively referred to as the weight portion 7. In other words, the rotating body 5 has the water-discharging means 4 fixed to one side of the rotating shaft 3, and the other side forms the weight portion 7.

[0013] The weight of the weight portion 7 is the weight when the water-discharging means 4 is located on the upper side and the weight portion 7 is located on the lower side when the support body 2 is arranged vertically, as shown in FIG. 1. As will be described in detail later, when water is discharged by the water-discharging means 4, the rotation of the rotor 5 due to the water-discharging reaction force is canceled out by the weight of the weight portion 7. This prevents the water-discharging reaction force from acting directly on the support body 2, while also preventing the water-discharging means 4 from tilting significantly. For example, when an operator uses the water-discharging device while holding the support body 2, the operator is not directly subjected to the water-discharging reaction force, and the water-discharging means 4 is prevented from tilting significantly, so water can be discharged stably to the target position.

[0014] Before describing the detailed effects of the water-discharging device 1 according to this embodiment, a water-discharging device 100 according to a comparative example will be described. Fig. 2 is a perspective view showing the main parts of the water-discharging device 100 according to the comparative example. Fig. 2 illustrates a state in which a long support body 101 is arranged vertically. A water-discharging means 102 is fixed directly to the support body 101. The configuration of the water-discharging means 102 is similar to that of the water-discharging means 4 shown in Fig. 1, with branch hoses 102b and 102c branching off from a main hose 102a, and liquid such as water being discharged from the tips of the branch hoses 102b and 102c (arrow a).

[0015] Fig. 3 is a side view of the water-discharging device 100 shown in Fig. 2. When an operator holds the lower part of the support body 101 and discharges water from the water-discharging means 102 (arrow a), the water-discharging reaction force causes the water-discharging device 100 to tilt in the direction opposite to the water-discharging direction (arrow b direction). The two-dot chain line shows the water-discharging device 100 in a tilted state.

[0016] In this way, when the water-discharging device 100 is in an inclined state, the operator is directly subjected to the water-discharging reaction force, which makes the operation unstable and makes it difficult to stably discharge water to the target position.

[0017] The effects of the water-discharging device 1 according to this embodiment will be described below. Fig. 4 is a side view of the water-discharging device 1 shown in Fig. 1. In this figure, water discharging has not yet started, and the rotating body 5 is vertically arranged along the vertically arranged support body 2. Fig. 5 is a side view showing the state of the water-discharging device 1 when discharging water. In this figure, the rotating body 5 has rotated and tilted compared to Fig. 4, but this is an illustration to conveniently show the moment acting on the rotating body 5, and is not an illustration showing a stable state.

[0018] In Figure 5, when water is discharged (arrow a), a water-discharge reaction force F1 acts on fixed point 4d of branch hose 4b (the same applies to branch hose 4c; the same applies below). Fixed point 4d is the point at which branch hose 4b is fixed to first fixed part 6a. Fixed point 4d is on the center line of branch hose 4b, and in a side view such as Figure 5, it is on the center line 6c of fixed part 6.

[0019] The water discharge reaction force F1 acts on the rotating body 5 with a moment M1 (F1 x L1) acting around the center point 3a of the rotating shaft 3, rotating the rotating body 5 in a direction that lifts it up. The center point 3a of the rotating shaft 3 is an arbitrary point on the center line of the rotating shaft 3, and when calculating the moment, the position on the center line of the rotating shaft 3 varies depending on the position of the point of application of the force. L1 is the distance between the center point 3a and the fixed point 4d.

[0020] Meanwhile, force W acts on weight 7 at the center of gravity 7a of weight 7. Force W is a force due to the weight of weight 7 and acts in a vertically downward direction. As shown in Figure 5, force W can be broken down into force W1, which acts in a direction perpendicular to center line 6c, and force W2, which acts in the same direction as center line 6c. Due to the action of force W1, a moment M2 (W1 x L2) acts on rotating body 5 around center point 3a, rotating body 5 in a direction returning it to the vertical. L2 is the distance between center point 3a and center of gravity 7a.

[0021] According to the above, when water discharge begins, moment M1 acts on rotor 5 about center point 3a, rotating rotor 5 in a direction lifting it up, and moment M2 acts on rotor 5 in a direction returning rotor 5 to vertical. Therefore, if L1, L2 and the weight of rotor 5 are set in advance to match the magnitude of water discharge reaction force F1, moment M1 is canceled out by moment M2, preventing rotor 5 from lifting up and making it possible to maintain rotor 5 in a vertical state as shown in Figure 4.

[0022] Therefore, according to the water-discharging device 1 of this embodiment, the action of the rotor 5 prevents the water-discharging means 4 from tilting due to the water-discharge reaction force, and therefore prevents the water-discharge reaction force from acting directly on the support body 2. Therefore, it becomes possible to stably support the support body 2 without supporting the support body 2 with a force greater than necessary or fixing it with a structure stronger than necessary, and it becomes possible to stably discharge water to the target position.

[0023] The following describes how the water-discharge device 1 according to this embodiment is used. Figure 6 shows the state in which an operator 10 is holding and using the water-discharge device 1. The operator 10 grasps the lower part of the support body 2 to keep the water-discharge device 1 upright. To facilitate movement of the water-discharge device 1, the support body 2 is attached to the ground via wheels 9. The wheels 9 may be omitted. As described above, the water-discharge reaction force is prevented from acting directly on the support body 2, and the action of the rotor 5 prevents the water-discharge means 4 from tilting due to the water-discharge reaction force. This allows the operator 10 to stably support the support body 2 without supporting it with more force than necessary, enabling stable water discharge to the target position.

[0024] FIG. 7 shows the water-discharging device 1 when it is installed on a fire engine 11 and in use. The lower part of the support body 2 is fixed to the fire engine 11. Water is discharged from the water-discharging means 4 toward a house 12. As with the case when the operator 10 holds and uses the water-discharging device 1, the water-discharge reaction force is prevented from acting directly on the support body 2, and the action of the rotor 5 prevents the water-discharge means 4 from tilting due to the water-discharge reaction force. This makes it possible to stably support the support body 2 without fixing it with a structure stronger than necessary, and to stably discharge water toward the target position.

[0025] Figure 8 shows a perspective view of an embodiment in which the arrangement of the support body 2 is changed from that of the water-discharging device 1 of Figure 1. In the water-discharging device 1 of Figure 1, the support body 2 extends below the rotation shaft 3, whereas in the water-discharging device 1 of Figure 8, the support body 2 extends above the rotation shaft 3. The water-discharging device 1 of Figure 8 is suitable for use by suspending the water-discharging device 1 from above. Although an example of a prismatic member is shown as the support body 2, it may also be a wire-like member.

[0026] Figure 9 shows the water-discharge device 1 when it is suspended from above. The water-discharge device 1 shown in Figure 9 corresponds to the water-discharge device 1 shown in Figure 8, except that the support body 2 is replaced with a wire instead of a rectangular pillar-shaped member. The water-discharge device 1 is suspended from a tower 13 installed on the roof of a building 14. Water is discharged from the water-discharge means 4 toward the building 14. As in the examples of Figures 6 and 7, the water-discharge reaction force is prevented from acting directly on the support body 2, and the action of the rotor 5 prevents the water-discharge means 4 from tilting due to the water-discharge reaction force, making it possible to stably support the support body 2 and stably discharge water toward the target position.

[0027] FIG. 10 is a perspective view showing another example of the weight 8 shown in FIG. 1. The weight 8 shown in FIG. 10 has a recess 8a formed therein that can accommodate an additional weight 20. The additional weight 20 is detachable from the recess 8a. The weight of the weight 8 can be changed by adding the additional weight 20 to the recess 8a. Furthermore, by providing additional weights 20 of different weights, the range of weight changes for the weight of the weight 8 can be widened. With a configuration that allows the addition of an additional weight 20, such as the weight 8 shown in FIG. 10, adding the additional weight 20 can prevent the water-discharge means 4 from tilting due to the water-discharge reaction force, even in a usage mode in which the water-discharge reaction force is large. This makes it possible to stably support the support body 2 and stably discharge water to the target position.

[0028] In the above-described embodiment, the structure of the rotor 5 shown in Fig. 1 etc. is an example, and other configurations are also possible. Fig. 11 is a perspective view showing another embodiment of the water-discharge device 1. The water-discharge device 1 shown in this figure differs from the water-discharge device 1 shown in Fig. 1 in the structure of the rotor 5. In Fig. 11, the weight portion 7 of the rotor 5 is branched into two V-shaped branches. The number of branches may be two or more.

[0029] Figure 12 is a perspective view showing yet another embodiment of the water-discharging device 1. The water-discharging device 1 shown in this figure also differs from the water-discharging device 1 shown in Figure 1 in the structure of the rotor 5. In Figure 12, the rotor 5 is made up of a single member, with the fixed part 6 and the weight part 7 being integrated together.

[0030] Although one embodiment of the present invention has been described above, the embodiment is merely an example and may be modified as appropriate. For example, in Figures 1, 11, and 12, each water-discharging device 1 has two rotors 5, but it may have one, or three or more.

[0031] Furthermore, the weight 8 is not limited to that of the above embodiment as long as it functions as a weight. For example, the weight 8 may be a water storage unit such as a tank, and water may be poured into the water storage unit to generate weight and function as a weight, while the stored water in the water storage unit is discharged from a hose provided on the water discharge means 4. [Explanation of symbols]

[0032] 1 Water spray device 2 Support 3 Rotation Axis 4 Water spraying means 5 Rotating body 6 Fixed part 7 Weight 8 weight

Claims

[Claim 1] Water discharge means; A rotation axis; a support that rotatably supports the rotation shaft; a rotating body attached to the rotating shaft and fixing the water discharge means, The water discharge means is fixed to one side of the rotation shaft of the rotating body, The rotating body has a weight portion on the other side of the rotation shaft, the weight of the weight portion is such that, when the support body is arranged vertically, the water-discharging means is located on the upper side and the weight portion is located on the lower side; A water-discharging device characterized in that, when water is discharged by the water-discharging means, rotation of the rotating body caused by a water-discharge reaction force is canceled by the weight of the weight portion.

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