Shape retention hose inspection device

Abstract

To provide a shape retention hose inspection device that has excellent workability of taking in and out of a shape retention hose to and from a fire hydrant device and enables checking of leakage and damage in the entire shape retention hose.SOLUTION: A shape retention hose inspection device includes: a water tank 2; a water pump that fills a shape retention hose 17 with water in the water tank 2 and applies a pressure to the water in the shape retention hose 17; and a holding unit 4 that holds the shape retention hose 17 in a state of being spirally wound in a vertical direction. The holding unit 4 classifies the shape retention hose 17 into a plurality of wound diameter groups G1, G2, G3, and G4 having different wound diameters and holds the shape retention hose 17 so as to form a step shape in which wound diameters of the wound diameter groups G1, G2, G3, and G4 increase for each step.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a shape-retaining hose inspection device for checking for leakage and damage of a shape-retaining hose stored in a fire hydrant device. [Background technology]

[0002] In order to extinguish fires that break out inside buildings, fire hydrant systems are provided in buildings such as apartment buildings. Conventional fire hydrant systems include a metal storage box with a door on the front, in which a fire hydrant valve is disposed and a fire hose is stored (see, for example, Patent Document 1). Patent Document 1 describes a fire hydrant system in which a fire hose with a nozzle attached to the tip is stored in a folded state by hanging it on a holder so that it can be freely pulled out. This fire hydrant system requires two people to operate it, and is legally regulated as a Type 1 fire hydrant. A flat hose is used as the fire hose that is hung on the holder in a folded state.

[0003] Meanwhile, legal standards have been established for No. 2 fire hydrants, which are fire hydrant devices that can be operated by one person and suppress the recoil force caused by water discharge and use a shape-retaining hose. No. 2 fire hydrant devices are designed to store a shape-retaining hose as a fire hose inside a metal storage box, just like No. 1 fire hydrants. However, No. 2 fire hydrants store their fire hoses differently from No. 1 fire hydrants (see Patent Document 2, for example). In the fire hydrant device of Patent Document 2, the shape-retaining hose is stored inside a storage box while being held in a shape-retaining hose holding frame in a spirally wound state.

[0004] As described above, there are two types of fire hydrant devices: No. 1 fire hydrants that store flat hoses in a folded state, and No. 2 fire hydrants that store shape-retaining hoses in a spirally wound state. For No. 1 fire hydrants, a hose inspection device has been developed to check for leakage and damage due to aging of the hose end portion of fire hydrant devices that have been installed for many years (see, for example, Patent Document 3). Patent Document 3 discloses a fire hose end pressure tester equipped with a hose clamp that clamps the hose at a predetermined length from the hose end. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-239485 A [Patent Document 2] Japanese Patent Application Publication No. 11-47303 [Patent Document 3] JP 2005-221475 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the main purpose of the conventional hose inspection device as described in Patent Document 3 is to check for leakage or damage at the hose end, and it is not possible to check for leakage or damage throughout the entire hose. In addition, the hose inspection device of Patent Document 3 needs to clamp the hose with a hose clamp. Although there is no problem with clamping a flat hose, there is a problem in that a shape-retaining hose that has a certain rigidity so that the cross section is not crushed is not suitable for clamping. In addition, the hose inspection device of Patent Document 3 removes the hose from the fire hydrant device to inspect it, but no consideration was given at all to the ease of inserting and removing the fire hose into and from the fire hydrant device.

[0007] The present invention has been made in consideration of the above-mentioned situation, and its object is to provide a shape-retaining hose inspection device that is easy to operate when inserting and removing a shape-retaining hose from a fire hydrant device, and is capable of checking for leaks and damage throughout the shape-retaining hose. [Means for solving the problem]

[0008] The inventions disclosed in this specification to solve the above problems are configured as follows: That is, a first invention is characterized by comprising a water tank, a water pump that fills a shape-retaining hose with water from the water tank and pressurizes the water in the shape-retaining hose, and a holding unit that holds the shape-retaining hose in a spirally wound state in the vertical direction.

[0009] According to the first invention, the holding unit of the shape-retaining hose inspection device has a structure that holds the shape-retaining hose in a spirally wound state. With this, when the shape-retaining hose is stored in a spirally wound state in the storage box of the fire hydrant device, the shape-retaining hose can be easily placed in the holding unit by utilizing the curling tendency of the shape-retaining hose after it is removed from the storage box. Furthermore, when returning the shape-retaining hose to the storage box of the fire hydrant device after the inspection work is completed, the shape-retaining hose can be stored in the storage box in a state close to the spiral state before the inspection work by lifting up the entire shape-retaining hose arranged in a spiral. Therefore, the workability of inserting and removing the shape-retaining hose into and from the fire hydrant device is excellent.

[0010] In addition, the holding unit holds the shape-retaining hose in a vertically spirally wound state. The shape-retaining hose does not bend along the way. This allows the shape-retaining hose to be easily filled with water from its bottom end to its top end by utilizing gravity when filling the shape-retaining hose with water. This makes it easy to check for leaks and damage to the entire shape-retaining hose.

[0011] In a second invention, in the first invention, the holding unit divides the shape-retaining hose into a plurality of winding diameter groups having mutually different winding diameters, and holds the shape-retaining hose in a stepped manner in which the winding diameter of each winding diameter group increases with each step.

[0012] According to the second aspect of the present invention, when the shape-retaining hose is lifted after the inspection work, it can be removed from the holding unit in a state that is closer to the spiral state it was in before the inspection work. This allows the shape-retaining hose to be stored in the storage box of the fire hydrant device in a state similar to the spiral state it was in before the inspection work. This further improves the ease of storing the shape-retaining hose in the fire hydrant device.

[0013] Furthermore, the shape-retaining unit holds the shape-retaining hose so that the reel diameter of the reel diameter group increases with each step. Therefore, the reel diameter of the topmost reel diameter group is the largest. When removing the shape-retaining hose from the holding unit after inspection work, the topmost reel diameter group is the easiest to remove, so it is natural to remove it based on the topmost reel diameter group. This makes it easy to remove the shape-retaining hose from the holding unit and store it in the storage box of the fire hydrant device while maintaining its maximum reel diameter. This prevents the maximum reel diameter of the shape-retaining hose from becoming larger than before the inspection work, making it impossible to store it in the storage box of the fire hydrant device, resulting in excellent workability.

[0014] Moreover, the shape-retaining hose stored in a spiral state in the storage box of the fire hydrant device is usually configured so that a nozzle with a valve function is attached to the end on the center side of the spiral, and the end on the outside of the spiral is attached to a fire hydrant valve. The holding unit positions the end on the center side of the spiral, which has the smallest winding diameter, at the bottom of the winding diameter group, and the end on the outside of the spiral, which has the largest winding diameter, at the top of the winding diameter group. Therefore, when the end on the outside of the spiral of the shape-retaining hose held in the holding unit is connected to the water supply pipe of the water pump and the valve inside the nozzle with a valve function at the end on the center side of the spiral is closed, the shape-retaining hose can be filled with water with the nozzle with a valve function positioned at the bottom of the holding unit, and inspection work can be performed by pressurization. This makes it easy to check for leaks and damage to the nozzle with a valve function, and when the inspection work is completed, the valve inside the nozzle with a valve function can be opened to easily drain the water from the shape-retaining hose.

[0015] The third invention is characterized in that, in the second invention, it is provided with a hose connection unit that connects the upper end of the shape-retaining hose at a position above the holding unit, and the hose connection unit is provided with a hose connection port for removably attaching the upper end of the shape-retaining hose, an air circulation port provided at a position above the hose connection port for supplying air to the shape-retaining hose or exhausting air from the shape-retaining hose, a water supply port to which a water supply pipe from the water pump is connected and is provided at a vertically intermediate position between the hose connection port and the air circulation port, and an opening / closing valve connected to the air circulation port.

[0016] According to the third aspect of the invention, when the on-off valve is open and water is supplied from the water pump, the shape-retaining hose can be easily filled with water by gravity. As water accumulates in the shape-retaining hose, the air that is displaced can be discharged without resistance from the air circulation port. Furthermore, the completion of filling the shape-retaining hose with water can be easily determined when water, not air, comes out of the air circulation port. Furthermore, once filling of the shape-retaining hose with water is complete, the on-off valve can be closed to easily begin inspection work by applying pressure.

[0017] The fourth invention is characterized in that, in the third invention, a water receiving tank is provided for receiving the water in the shape-retaining hose that is discharged from the lower end of the shape-retaining hose, the water tank is arranged at a position below the water receiving tank, and the water receiving tank and the water tank are connected by a water return piping.

[0018] According to the fourth aspect of the present invention, after filling the shape-retaining hose with water and carrying out the inspection work by pressurizing it, the water in the shape-retaining hose can be returned to the water tank without being discharged to the outside. This makes it possible to carry out the inspection work of the multiple shape-retaining hoses stored in each of the multiple fire hydrant devices without refilling the water tank with water, resulting in excellent workability.

[0019] A fifth invention is characterized in that in any one of the second to fourth inventions, a rotation support unit is provided that supports the holding unit rotatably about a vertical axis.

[0020] According to the fifth aspect of the present invention, when placing the shape-retaining hose taken out of the storage box of the fire hydrant device in the holding unit, the shape-retaining hose can be easily placed while being untangled. Also, the shape-retaining hose can be placed in the holding unit without the worker having to move his / her hands significantly. This provides excellent workability.

[0021] A sixth invention is characterized in that, in the fifth invention, the holding unit holds the shape-retaining hose so that the winding diameter center of the winding diameter group is eccentric with respect to the center of rotation of the rotation support unit, and so that all of the winding diameter groups are arranged biased in one direction when the holding unit is viewed in a plane.

[0022] According to the sixth aspect of the present invention, when the holding unit is viewed from above, all the winding diameter groups are arranged biased in one direction, so that on the one side, the interval between the shape-retaining hose of two adjacent winding diameter groups is small, while on the opposite side to the one side, the interval between the shape-retaining hose of two adjacent winding diameter groups is large. In the area where the interval is large, the moving distance of the shape-retaining hose can be increased when the winding diameter of the shape-retaining hose is shifted from the current winding diameter to the next higher winding diameter. This allows the winding diameter of the shape-retaining hose to be gradually changed to the winding diameter of the next higher winding diameter group, making it easy to place the shape-retaining hose in the holding unit while changing the winding diameter. Effect of the Invention

[0023] The shape-retaining hose inspection device of the present invention has excellent operability in inserting and removing the shape-retaining hose into and from the fire hydrant device, and can check for leaks and damage to the entire shape-retaining hose. [Brief description of the drawings]

[0024] [Figure 1] 1 is a front view of a shape-retaining hose inspection device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a side view of the shape-retaining hose inspection device according to the present embodiment. [Diagram 3] FIG. 2 is a plan view of the main parts of the shape-retaining hose inspection device according to the present embodiment. [Figure 4] 4 is a plan view showing a state in which a holding unit is removed from FIG. 3. FIG. [Diagram 5] FIG. 11 is a comparative diagram showing three types of rack frames of the holding unit. [Figure 6] FIG. 4 is a plan view showing a holding member of the holding unit. [Figure 7] FIG. 4 is a side view showing a holding member of the holding unit. [Figure 8] 13 is an enlarged side view of a main portion showing attachment of the holding unit to the rotation support unit. FIG. [Figure 9] FIG. 2 is a water piping diagram of the shape-retaining hose inspection device according to the present embodiment. [Figure 10] 1 is a side view showing a state in which a shape-retaining hose is placed in an inspection work position in the shape-retaining hose inspection device according to this embodiment. FIG. [Figure 11] 1 is a plan view of a main portion of a shape-retaining hose inspection device according to the present embodiment, showing a state in which the shape-retaining hose is positioned for inspection work. FIG. [Figure 12] 13 is a plan view for explaining the operation of placing shape-retaining hoses on racks of the holding unit while rotating the holding unit. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0026] FIG. 1 is a front view of a shape-retaining hose inspection device 1 according to an embodiment of the present invention. FIG. 2 is a side view of the shape-retaining hose inspection device 1 according to this embodiment. FIG. 3 is a plan view of the main part of the shape-retaining hose inspection device 1 according to this embodiment. The shape-retaining hose inspection device 1 of this embodiment is for checking the presence or absence of leakage and damage due to deterioration due to age-related deterioration for a shape-retaining hose 17 (see FIG. 13) stored in a spiral shape in a fire hydrant device installed in various places in a building such as an apartment building. As shown in FIGS. 1 to 3, the shape-retaining hose inspection device 1 of this embodiment includes a cart section 9, a water tank 2, a water pump 3, a blower 14, a stand 8, a water receiving tank 7, a rotation support unit 5, a holding unit 4, a support stand 6, a hose connection unit 11, an operation panel 13, and a water splash prevention curtain 16.

[0027] The cart unit 9 includes a base unit 91 having a rectangular plate shape that is long in the front-rear direction, four casters 92 attached to the underside of the base unit 91, and a handle unit 93 erected at the rear end of the base unit 91. The cart unit 9 is provided for transporting all the equipment required for the inspection work of the shape-retaining hose 17. The size of the cart unit 9 is set to a size that allows it to be placed in an elevator and pass through various doors so that it can be easily moved to the fire hydrant devices installed in multiple locations within the building. A water tank 2, a water pump 3, and a blower 14 are installed on the upper surface of the base unit 91 of the cart unit 9.

[0028] The water tank 2 is, for example, a tank made of polyethylene, and as shown in FIG. 1, has a width substantially the same as that of the base portion 91 when viewed from the front. Moreover, as shown in FIG. 2, the water tank 2 is installed in front of the base portion 91. The water tank 2 is pre-stored with an amount of water necessary to fill the inside of at least one shape-retaining hose 17. However, as will be described later, the water in the water tank 2 is returned after the inspection work, so that water sufficient to fill the insides of two shape-retaining hoses 17 is not required. For example, a water tank 2 with a capacity of about 40 liters is used.

[0029] The water pump 3 is disposed at the center of the base portion 91. The water pump 3 is, for example, a self-priming diaphragm pump. The blower 14 is disposed behind the water pump 3. The blower 14 is, for example, a centrifugal blower.

[0030] The stand 8 is placed on a base portion 91 of the cart unit 9. The stand 8 includes four legs 81 arranged at the four corners of the base portion 91, and a top frame portion 82 supported by the legs 81. As shown in FIG. 3, the top frame portion 82 is formed in a quadrangle in a plan view. As shown in FIG. 2, the top frame portion 82 is attached to the upper ends of the four legs 81, so that there is a space between the base portion 91 and the top frame portion 82. The water tank 2, the water pump 3, and the blower 14 are installed in this space.

[0031] FIG. 4 is a plan view showing a state in which the holding unit 4 is removed from FIG. 3. As shown in FIGS. 2 to 4, the water receiving tank 7 is installed on the upper surface of the top frame portion 82 of the stand 8. The water receiving tank 7 has a bottom wall portion 7b formed in an octagonal shape in a plan view and a side wall portion 7a erected along the outer edge of the bottom wall portion 7b. The top of the water receiving tank 7 is open. In addition, as shown in FIG. 4, the bottom wall portion 7b is provided with a drain port 7c. The upper end of a water return pipe 151 extending downward is connected to the drain port 7c. The lower end of the water return pipe 151 is connected to the water tank 2 disposed below the water receiving tank 7. That is, the water receiving tank 7 and the water tank 2 are connected by the water return pipe 151.

[0032] The rotation support unit 5 is provided to support the holding unit 4 so as to be rotatable about a vertical axis. As shown in Figs. 2 and 4, the rotation support unit 5 has a base frame 51, four support pulleys 52, and a guide tube portion 53. The base frame 51 is formed in a cross shape in a plan view, and is installed on the upper surface of the center of the bottom wall portion 7b of the water receiving tank 7. The four support pulleys 52 are arranged one at each end of each arm of the cross-shaped base frame 51. The rotation central axis of each support pulley 52 is set to face the center of the cross-shaped base frame 51 in a plan view (the dashed line passing through the support pulley 52 and the guide tube portion 53 in Fig. 4 is the axial direction of the rotation central axis). The guide tube portion 53 is provided at the center of the base frame 51 so as to extend upward from the upper surface of the base frame 51.

[0033] The holding unit 4 is provided to hold the shape-retaining hose 17 in a spirally wound state in the vertical direction. As shown in Figs. 1 to 3, the holding unit 4 includes a circular, metal bottom plate portion 40, one metal first rack 41, two metal second racks 42, and one metal third rack 43. A central hole 40a is provided at the center of the bottom plate portion 40 (see Fig. 8). As shown in Fig. 3, the first rack 41, the two second racks 42, and the third rack 43 are erected on the upper surface of the bottom plate portion 40 so as to be arranged in a cross shape in a plan view with the rack center C2 as the center.

[0034] FIG. 5 is a comparative diagram showing three types of rack frames 410, 420, and 430 of the holding unit 4. Detailed structures of the first rack 41, the second rack 42, and the third rack 43 will be described with reference to FIGS. 1 to 3 and 5. As shown in FIG. 1, the first rack 41 is made of metal and has a rack frame 410, a first holding member 411, a second holding member 412, a third holding member 413, a fourth holding member 414, and a fifth holding member 415. The third rack 43 is disposed so as to face the first rack 41 in the horizontal direction. The third rack 43 is made of metal and has a rack frame 430, a first holding member 431, a second holding member 432, a third holding member 433, a fourth holding member 434, and a fifth holding member 435.

[0035] 2, the two second racks 42 are arranged to face each other in the horizontal direction. The second rack 42 is made of metal, and has a rack frame 420, a first holding member 421, a second holding member 422, a third holding member 423, a fourth holding member 424, and a fifth holding member 425.

[0036] As shown in Fig. 5, the rack frames 410, 420, and 430 are formed in a generally flat plate shape. In the rack frame 410 in Fig. 5(b), the left end portion and the lower end portion are bent from the flat plate to form a side bent portion 410g (see (a)) and a lower bent portion 410f (see (e)). In the rack frame 410, a first slit portion 410a, a second slit portion 410b, a third slit portion 410c, a fourth slit portion 410d, and a fifth slit portion 410e are formed in a stepped shape from the bottom to the top.

[0037] In addition, in the rack frame 420 of FIG. 5(c), the left end portion and the lower end portion are bent from a flat plate to form a side bent portion 420g (see (a)) and a lower bent portion 420f (see (f)). In the rack frame 420, a first slit portion 420a, a second slit portion 420b, a third slit portion 420c, a fourth slit portion 420d, and a fifth slit portion 420e are formed in a stepped shape from the lower portion to the upper portion. In addition, in the rack frame 430 of FIG. 5(d), the left end portion and the lower end portion are bent from a flat plate to form a side bent portion 430g (see (a)) and a lower bent portion 430f (see (g)). In the rack frame 430, a first slit portion 430a, a second slit portion 430b, a third slit portion 430c, a fourth slit portion 430d, and a fifth slit portion 430e are formed in a stepped manner from the bottom to the top.

[0038] The first slit portion 410a of the rack frame 410, the first slit portion 420a of the rack frame 420, and the first slit portion 430a of the rack frame 430 are provided at the same height position. Also, the second slit portion 410b of the rack frame 410, the second slit portion 420b of the rack frame 420, and the second slit portion 430b of the rack frame 430 are provided at the same height position. Also, the third slit portion 410c of the rack frame 410, the third slit portion 420c of the rack frame 420, and the third slit portion 430c of the rack frame 430 are provided at the same height position. Also, the fourth slit portion 410d of the rack frame 410, the fourth slit portion 420d of the rack frame 420, and the fourth slit portion 430d of the rack frame 430 are provided at the same height position. Furthermore, the fifth slit portion 410e of the rack frame 410, the fifth slit portion 420e of the rack frame 420, and the fifth slit portion 430e of the rack frame 430 are provided at the same height position.

[0039] In addition, the first slit portion 410a, the second slit portion 410b, the third slit portion 410c, the fourth slit portion 410d, and the fifth slit portion 410e of the rack frame 410 are arranged at equal intervals in the horizontal direction. Similarly, the first slit portion 420a, the second slit portion 420b, the third slit portion 420c, the fourth slit portion 420d, and the fifth slit portion 420e of the rack frame 420 are arranged at equal intervals in the horizontal direction. Similarly, the first slit portion 430a, the second slit portion 430b, the third slit portion 430c, the fourth slit portion 430d, and the fifth slit portion 430e of the rack frame 430 are arranged at equal intervals in the horizontal direction.

[0040] On the other hand, the horizontal distance between adjacent slit portions in rack frame 420 is greater than the horizontal distance between adjacent slit portions in rack frame 410. Also, the horizontal distance between adjacent slit portions in rack frame 430 is greater than the horizontal distance between adjacent slit portions in rack frame 420.

[0041] FIG. 6 is a plan view showing the first holding member 411 of the holding unit 4. FIG. 7 is a side view showing the first holding member 411 of the holding unit 4. As shown in FIG. 6 and FIG. 7, the first holding member 411 has a band-shaped outer vertical wall 411a extending in the vertical direction, a band-shaped inner vertical wall 411b facing the outer vertical wall 411a and extending in the vertical direction, a bottom wall 411d connecting the lower end of the outer vertical wall 411a and the lower end of the inner vertical wall 411b, and an inner inclined wall 411c connected to the upper end of the inner vertical wall 411b and inclined so as to move away from the outer vertical wall 411a as it goes upward. The distance between the outer vertical wall 411a and the inner vertical wall 411b is set to a size approximately equal to the diameter of the shape-retaining hose 17 (for example, approximately 30 to 35 mm). The first holding member 411 is set to a size capable of holding three cross sections of the shape-retaining hose 17 in the vertical direction.

[0042] 1, the second holding member 412 of the first rack 41 has a shape having an outer vertical wall portion, an inner vertical wall portion, a bottom wall portion, and an inner inclined wall portion, similar to the first holding member 411. However, the second holding member 412 is formed slightly longer in the vertical direction than the first holding member 411. The second holding member 412 is set to a size capable of holding four cross sections of the shape-retaining hose 17 in the vertical direction. The third holding member 413, the fourth holding member 414, and the fifth holding member 415 of the first rack 41 are formed to have the same shape as the second holding member 412.

[0043] 1 and 2, the first holding member 421 of the second rack 42 and the first holding member 431 of the third rack 43 are formed in the same shape as the first holding member 411 of the first rack 41. The second holding member 422, the third holding member 423, the fourth holding member 424, and the fifth holding member 425 of the second rack 42 are formed in the same shape as the second holding member 412 of the first rack 41. The second holding member 432, the third holding member 433, the fourth holding member 434, and the fifth holding member 435 of the third rack 43 are formed in the same shape as the second holding member 412 of the first rack 41.

[0044] A first holding member 411, a second holding member 412, a third holding member 413, a fourth holding member 414, and a fifth holding member 415 are attached by welding to the first slit portion 410a, the second slit portion 410b, the third slit portion 410c, the fourth slit portion 410d, and the fifth slit portion 410e of the rack frame 410 shown in Fig. 5. Also, a first holding member 421, a second holding member 422, a third holding member 423, a fourth holding member 424, and a fifth holding member 425 are attached by welding to the first slit portion 420a, the second slit portion 420b, the third slit portion 420c, the fourth slit portion 420d, and the fifth slit portion 420e of the rack frame 420, respectively. In addition, a first retaining member 431, a second retaining member 432, a third retaining member 433, a fourth retaining member 434 and a fifth retaining member 435 are attached by welding to the first slit portion 430a, the second slit portion 430b, the third slit portion 430c, the fourth slit portion 430d and the fifth slit portion 430e of the rack frame 430, respectively.

[0045] As shown in FIG. 3, the first rack 41 is attached to the bottom plate portion 40 by welding the downward bent portion 410f of the rack frame 410 to the upper surface of the circular plate-shaped bottom plate portion 40. The five holding members 411 to 415 of the first rack 41 are aligned in a straight line in the radial direction of the bottom plate portion 40. All the inner inclined wall portions of the five holding members 411 to 415 are arranged toward the center of the bottom plate portion 40. The second rack 42 is attached to the bottom plate portion 40 by welding the downward bent portion 420f of the rack frame 420 to the upper surface of the bottom plate portion 40. The five holding members 421 to 425 of the second rack 42 are aligned in a straight line in the radial direction of the bottom plate portion 40. All the inner inclined wall portions of the five holding members 421 to 425 are arranged toward the center of the bottom plate portion 40.

[0046] The third rack 43 is attached to the bottom plate portion 40 by welding the downward bent portion 430f of the rack frame 430 to the upper surface of the bottom plate portion 40. The five holding members 431 to 435 of the third rack 43 are aligned in a straight line in the radial direction of the bottom plate portion 40. All the inner inclined wall portions of the five holding members 431 to 435 are arranged toward the center of the bottom plate portion 40. In this manner, the first rack 41, the two second racks 42, and the third rack 43 are erected on the upper surface of the bottom plate portion 40 so as to be aligned in a cross shape in a plan view with the rack center C2 as the center. The rack center C2 is eccentric with respect to the rotation center C1 of the bottom plate portion 40. However, the first rack 41, the second rack 42, and the third rack 43 on the bottom plate portion 40 are configured to be freely rotatable around the rotation center C1 (in the direction of the arrow in FIG. 3).

[0047] FIG. 8 is an enlarged side view of the main part showing the attachment of the holding unit 4 to the rotation support unit 5. As shown in FIG. 8, the holding unit 4 having the above-mentioned configuration is attached to the rotation support unit 5 so as to be rotatable about the vertical axis by fitting the central hole 40a of the bottom plate part 40 into the guide tube part 53 of the rotation support unit 5. The support pulley 52 of the rotation support unit 5 abuts against the bottom surface of the bottom plate part 40 of the holding unit 4 to support the holding unit 4. When the holding unit 4 is attached to the rotation support unit 5, the upper part of the guide tube part 53 protrudes upward from the bottom plate part 40. A stopper member 54 is attached to this protruding part. This prevents the bottom surface of the bottom plate part 40 and the upper end of the support pulley 52 from being separated when the holding unit 4 is rotated.

[0048] A rod-shaped support stand 6 extending in the vertical direction is attached to the guide tube portion 53. More specifically, an insertion portion 6a is provided at the lower end of the support stand 6, and the support stand 6 is attached to the guide tube portion 53 by inserting this insertion portion 6a into the guide tube portion 53 from above. The upper end of the support stand 6 extends to a height position even higher than the upper end of the holding unit 4. An attachment portion 6b is provided at the upper end of the support stand 6. A hose connection unit 11 is attached to this attachment portion 6b, as shown in FIG. 1. The hose connection unit 11 connects the upper end of the shape-retaining hose 17 above the holding unit 4.

[0049] FIG. 9 is a water piping diagram of the shape-retaining hose inspection device 1 according to this embodiment. As shown in FIG. 9, the hose connection unit 11 includes a hose connection port 111, an air circulation port 112, and a water supply port 113. The hose connection port 111 is provided for detachably attaching the connection end 17a of the upper end of the shape-retaining hose 17. The air circulation port 112 is provided at a position above the hose connection port 111. The air circulation port 112 is provided for supplying air to the shape-retaining hose 17 or discharging air from the shape-retaining hose 17. The water supply port 113 is provided at a vertical intermediate position between the hose connection port 111 and the air circulation port 112. A third supply pipe 155 of water from the water pump 3 is connected to the water supply port 113. The third supply pipe 155 is made of, for example, a flexible hose.

[0050] The piping for supplying water to the third supply pipe 155 will be described. First, water used during inspection work is stored in the water tank 2. The water tank 2 is connected to the water pump 3 by a pump connection pipe 152. The pump connection pipe 152 supplies the water of the water tank 2 to the water pump 3. A first supply pipe 153 is connected to the discharge port of the water pump 3. The downstream end of the first supply pipe 153 is connected to the pressure control valve 133. A second supply pipe 154 is connected to the pressure control valve 133 for sending pressure-adjusted water. In addition, a relief pipe 156 is connected to the pressure control valve 133. The relief pipe 156 is provided to release excess water to the water receiving tank 7 when the pressure of the water supplied from the water pump 3 is higher than the set pressure of the pressure control valve 133.

[0051] A pressure gauge 132 is connected to the second supply pipe 154. The pressure gauge 132 is provided to check the pressure applied to the shape-retaining hose 17. The upstream end of the third supply pipe 155 is connected to the downstream end of the second supply pipe 154. The downstream end of the third supply pipe 155 is connected to the water supply port 113 of the hose connection unit 11. This allows the water in the water tank 2 to be supplied to the shape-retaining hose 17 when the water pump 3 is driven. The pressure control valve 133 and the pressure gauge 132 are attached to the operation panel 13 as shown in Figures 2 and 3. The operation panel 13 is provided at the upper end of the operation panel support part 12 erected at the rear end of the base part 91 of the cart part 9. In addition to the pressure control valve 133 and the pressure gauge 132, the operation panel 13 is also provided with a pump drive switch 131. This pump drive switch 131 starts and stops the water pump 3.

[0052] As shown in Fig. 9, the connection end 17a at the upper end of the shape-retaining hose 17 is attached to the hose connection port 111 of the hose connection unit 11 during inspection work. Meanwhile, a nozzle with valve function 18 is attached to the lower end of the shape-retaining hose 17. This nozzle with valve function 18 is not newly attached to the shape-retaining hose 17 during inspection work. The nozzle with valve function 18 is stored in the storage box of the fire hydrant device in a state where it is attached to the end of the shape-retaining hose 17 on the center side of the spiral shape. Therefore, during inspection work of the shape-retaining hose 17, not only is damage and leakage of the shape-retaining hose 17 itself checked, but the presence or absence of water leakage and damage of the nozzle with valve function 18 is also checked at the same time.

[0053] During inspection work, the valve nozzle 18 is placed directly above the bottom wall 7b of the water receiving tank 7. When the valve inside the valve nozzle 18 is closed, the water supplied from the third supply pipe 155 can be filled into the shape-retaining hose 17 through the hose connection port 111. When filling the shape-retaining hose 17 with water, the open / close valve 114 is opened. This allows the air inside the shape-retaining hose 17 to escape to the outside. If the water pump 3 is driven even after the shape-retaining hose 17 is filled with water, water will flow out from the open open / close valve 114. A water guide pipe 157 made of a flexible hose is connected to the open / close valve 114 so that the water that has flowed out can be received by the water receiving tank 7. The tip of the water guide pipe 157 is placed directly above the bottom wall 7b of the water receiving tank 7.

[0054] When pressurizing the shape-retaining hose 17 after filling it with water, the open / close valve 114 is closed. The valve inside the nozzle 18 with valve function is also closed and the water pump 3 is driven, so that the shape-retaining hose 17 can be pressurized. This makes it possible to check for leakage or damage to the shape-retaining hose 17. On the other hand, when draining the water from the shape-retaining hose 17 after checking for leakage or damage to the shape-retaining hose 17, both the open / close valve 114 and the valve inside the nozzle 18 with valve function are opened. Then, the water from the shape-retaining hose 17 can be drained by gravity. The drained water can be received in the water receiving tank 7. The water received in the water receiving tank 7 is returned to the water tank 2 through the water return pipe 151.

[0055] The shape-retaining hose inspection device 1 of this embodiment is equipped with a blower 14. The blower 14 is provided to completely drain the water from within the shape-retaining hose 17. Specifically, after the water from within the shape-retaining hose 17 is first drained by gravity, the water guide pipe 157 attached to the open / close valve 114 is removed, and one end of the air pressure pipe 158 is attached. Then, the blower 14 is connected to the other end of the air pressure pipe 158 and driven, so that the water from within the shape-retaining hose 17 can be forcibly drained. This makes it possible to shorten the work time.

[0056] Fig. 10 is a side view showing a state in which the shape-retaining hose 17 is placed in an inspection work state in the shape-retaining hose inspection device 1 according to this embodiment. Fig. 11 is a plan view of the main part showing a state in which the shape-retaining hose 17 is placed in an inspection work state in the shape-retaining hose inspection device 1 according to this embodiment.

[0057] 10 and 11, the holding unit 4 divides the shape-retaining hose 17 into a plurality of winding diameter groups G1, G2, G3, and G4 having mutually different winding diameters, and holds the shape-retaining hose 17 in a stepped manner in which the winding diameters of the winding diameter groups G1, G2, G3, and G4 increase with each step. The holding unit 4 holds the shape-retaining hose 17 so that the winding diameter centers of the winding diameter groups G1, G2, G3, and G4 are eccentric with respect to the rotation center C1 of the rotation support unit 5, and so that all the winding diameter groups G1, G2, G3, and G4 are arranged biased in one direction when the holding unit 4 is viewed in a plan view.

[0058] The first winding diameter group G1 is a portion of the shape-retaining hose 17 held by the first holding member 411 of the first rack 41, the first holding member 421 of the second rack 42, and the first holding member 431 of the third holding member 423. The second winding diameter group G2 is a portion of the shape-retaining hose 17 held by the second holding member 412 of the first rack 41, the second holding member 422 of the second rack 42, and the second holding member 432 of the third rack 43. The third winding diameter group G3 is a portion of the shape-retaining hose 17 held by the third holding member 413 of the first rack 41, the third holding member 423 of the second rack 42, and the third holding member 433 of the third rack 43. Additionally, the fourth winding diameter group G4 is a portion of the shape-retaining hose 17 that is held by the fourth holding member 414 of the first rack 41, the fourth holding member 424 of the second rack 42, and the fourth holding member 434 of the third rack 43. In the first winding diameter group G1, the shape-retaining hose 17 is wound three times in the vertical direction. Additionally, in the second winding diameter group G2, the third winding diameter group G3, and the fourth winding diameter group G4, the shape-retaining hose 17 is wound four times in the vertical direction.

[0059] As shown in Fig. 11, the holding unit 4 arranges the shape-retaining hoses 17 in the first rack 41 so that the intervals between the four winding diameter groups G1, G2, G3, and G4 are generally small. The holding unit 4 arranges the shape-retaining hoses 17 in the third rack 43 so that the intervals between the four winding diameter groups G1, G2, G3, and G4 are generally large. The holding unit 4 arranges the shape-retaining hoses 17 in the second rack 42 so that the intervals between the four winding diameter groups G1, G2, G3, and G4 are intermediate between the first rack 41 and the third rack 43. In Fig. 11, the intervals between the shape-retaining hoses 17, 17 of two adjacent winding diameter groups are relatively large from the upper second rack 42 to the third rack 43 and from the third rack 43 to the lower second rack 42. In the region where the interval is increased, the moving distance of the shape-retaining hose 17 can be increased when the winding diameter of the shape-retaining hose 17 is changed from the current winding diameter to the next higher winding diameter. This allows the winding diameter of the shape-retaining hose 17 to be gradually changed to the winding diameter of the next higher winding diameter group.

[0060] A procedure for inspecting the shape-retaining hose 17 will be described for the shape-retaining hose inspection device 1 configured as described above. Fig. 12 is a plan view for explaining the work of arranging the shape-retaining hose 17 on the racks 41, 42, and 43 of the holding unit 4 while rotating the holding unit 4.

[0061] First, move the shape-retaining hose inspection device 1 close to the fire hydrant device. The shape-retaining hose inspection device 1 can be easily moved using the casters 92 of the dolly unit 9. Next, connect the water pump 3 and the blower 14 of the shape-retaining hose inspection device 1 to a power source.

[0062] Next, the shape-retaining hose 17 stored in a spiral shape in the storage box of the fire hydrant device is removed. When removing this shape-retaining hose 17, the connection end 17a of the shape-retaining hose 17 is removed from the fire hydrant valve. Next, the shape-retaining hose 17 is carried to the shape-retaining hose inspection device 1 while still in the spiral shape.

[0063] Next, the nozzle 18 with valve function at the end of the center of the spiral of the shape-retaining hose 17 is placed on the bottom plate 40 of the holding unit 4. Then, the shape-retaining hose 17 is spirally wound around each of the holding members 411-415, 421-425, 431-435 of the first rack 41, the second rack 42, and the third rack 43, starting from the bottom. At that time, as shown in FIG. 12, the shape-retaining hose 17 is placed on the racks 41, 42, and 43 of the holding unit 4 while rotating the holding unit 4 in the direction of the arrow. The shape-retaining hose 17 is available in two diameters: 25 mm and 30 mm. In the case of a diameter of 25 mm, for example, the holding members 411-414, 421-424, and 431-434 from the bottom to the fourth tier are used. In addition, in the case of a diameter of 30 mm, for example, the holding members 412 to 415, 422 to 425, and 432 to 435 from the second to fifth stages are used.

[0064] Next, the connecting end 17a of the shape-retaining hose 17 is connected to the hose connection port 111 of the hose connection unit 11. Next, if the third supply pipe 155 is not connected to the water supply port 113 of the hose connection unit 11, the third supply pipe 155 is connected. Next, the opening / closing valve 114 of the hose connection unit 11 and the valve inside the nozzle with valve function 18 are opened. Next, the pressure control valve 133 of the operation panel 13 is operated to set a predetermined set pressure. For example, in the case of a shape-retaining hose 17 with a diameter of 25 mm, the pressure is set to 1 MPa. Also, in the case of a shape-retaining hose 17 with a diameter of 30 mm, the pressure is set to 2 MPa. Next, the pump drive switch 131 of the operation panel 13 is operated to start the water pump 3. When water starts to come out of the nozzle with valve function 18 at the lower end of the shape-retaining hose 17, the valve inside the nozzle with valve function 18 is closed. Then, water accumulates inside the shape-retaining hose 17 from the lower part of the shape-retaining hose 17. As water accumulates inside the shape-retaining hose 17, the material discharged from the on-off valve 114 to the water guide pipe 157 changes. Specifically, only air is discharged at first, but gradually it turns into bubbles mixed with water, and finally only water is discharged. When only water is discharged from the on-off valve 114, the on-off valve 114 is closed.

[0065] Next, hang the water splash prevention curtain 16 so as to cover the entire holding unit 4. Next, start measuring time when the pressure gauge 132 on the operation panel 13 reaches the set pressure. Check that the pressure is maintained at the set pressure for two minutes and that there is no water leakage from the nozzle 18 with valve function or the shape-retaining hose 17.

[0066] Once the presence or absence of water leakage has been confirmed, the water pump 3 is stopped and removal work begins. First, the on-off valve 114 of the hose connection unit 11 and the valve inside the valve nozzle 18 are opened to allow the water in the shape-retaining hose 17 to drain naturally from the valve nozzle 18. When the water from the valve nozzle 18 starts to drip, the water guide pipe 157 is removed and instead the air pressure pipe 158 and the blower 14 are connected to the hose connection unit 11. The blower 14 is then driven to forcibly drain the water in the shape-retaining hose 17. For example, this forcible drainage is performed for 45 seconds. The water drained from the shape-retaining hose 17 is received in the water receiving tank 7. The water from the water receiving tank 7 is then returned to the water tank 2 through the water return pipe 151.

[0067] Next, in order to transport the shape-retaining hose 17, which is arranged in a spiral shape in the holding unit 4, to the fire hydrant device as is as possible, the first winding diameter group G1, the second winding diameter group G2, and the third winding diameter group G3 are lifted to the height position of the fourth winding diameter group G4, and then a belt is put around the shape-retaining hose 17 to tighten it. The shape-retaining hose 17 in this state is then transported to the fire hydrant device and stored in the storage box of the fire hydrant device. Next, the connection end 17a of the shape-retaining hose 17 is connected to the fire hydrant valve, and the valve inside the nozzle 18 with valve function is closed. This completes the inspection work of the shape-retaining hose 17.

[0068] As described above, the shape-retaining hose inspection device 1 of this embodiment comprises a water tank 2, a water pump 3 which fills the shape-retaining hose 17 with water from the water tank 2 and pressurizes the water in the shape-retaining hose 17, and a holding unit 4 which holds the shape-retaining hose 17 in a spirally wound state in the vertical direction.

[0069] According to the above configuration, the holding unit 4 of the shape-retaining hose inspection device 1 is structured to hold the shape-retaining hose 17 in a spirally wound state. As a result, for the shape-retaining hose 17 stored in a spirally wound state in the storage box of the fire hydrant device, after the shape-retaining hose 17 is taken out of the storage box, the shape-retaining hose 17 can be easily placed in the holding unit 4 by utilizing the winding tendency of the shape-retaining hose 17. Furthermore, when returning the shape-retaining hose 17 to the storage box of the fire hydrant device after the inspection work is completed, the shape-retaining hose 17 can be stored in the storage box in a state close to the spiral state before the inspection work by lifting up the entire shape-retaining hose 17 arranged in a spiral. Therefore, the workability of inserting and removing the shape-retaining hose 17 into and from the fire hydrant device is excellent.

[0070] Furthermore, the holding unit 4 holds the shape-retaining hose 17 in a vertically spirally wound state. The shape-retaining hose 17 does not bend midway. This allows the shape-retaining hose 17 to be easily filled with water from its entire lower end to its upper end by utilizing gravity when filling the shape-retaining hose 17 with water. This makes it easy to check the entire shape-retaining hose 17 for leaks and damage.

[0071] In the above embodiment, the holding unit 4 divides the shape-retaining hose 17 into a plurality of winding diameter groups G1, G2, G3, and G4 having mutually different winding diameters, and holds the winding diameter groups G1, G2, G3, and G4 in a stepped manner in which the winding diameter increases with each step.

[0072] According to the above configuration, when the shape-retaining hose 17 is lifted after the inspection work, it can be removed from the holding unit 4 in a state that is closer to the spiral state before the inspection work. This allows the shape-retaining hose 17 to be stored in the storage box of the fire hydrant device in a state similar to the spiral state before the inspection work. This further improves the workability of storing the shape-retaining hose 17 in the fire hydrant device.

[0073] Furthermore, the holding unit 4 holds the shape-retaining hose 17 so that the winding diameter of the winding diameter group increases with each step. Therefore, the winding diameter of the fourth winding diameter group G4 in the topmost step is the largest. When removing the shape-retaining hose 17 from the holding unit 4 after the inspection work, the fourth winding diameter group G4 in the topmost step is the easiest to remove, so the fourth winding diameter group G4 is naturally used as the basis for removal. This makes it easy to remove the shape-retaining hose 17 from the holding unit 4 while maintaining its maximum winding diameter and store it in the storage box of the fire hydrant device. This prevents the maximum winding diameter of the shape-retaining hose 17 from becoming larger than before the inspection work, making it impossible to store it in the storage box of the fire hydrant device, and thus provides excellent workability.

[0074] The shape-retaining hose 17 stored in a spiral state in the storage box of the fire hydrant device has the valve nozzle 18 attached to the end on the center side of the spiral, and the connection end 17a on the outside of the spiral is configured to be attached to the fire hydrant valve. The holding unit 4 has the end on the center side of the spiral with the smallest winding diameter positioned in the first winding diameter group G1 at the bottom, and the connection end 17a on the outside of the spiral with the largest winding diameter positioned in the fourth winding diameter group G4 at the top. Therefore, when the connection end 17a is connected to the third supply pipe 155 of the water pump 3 via the hose connection unit 11 and the valve inside the valve nozzle 18 is closed, the shape-retaining hose 17 can be filled with water with the valve nozzle 18 placed at the bottom of the holding unit 4, and inspection work can be performed by pressurization. This makes it easy to check for leaks and damage to the valve nozzle 18, and when the inspection work is completed, the valve inside the valve nozzle 18 can be opened to easily drain the water from the shape-retaining hose 17.

[0075] In the above embodiment, the shape-retaining hose inspection device 1 includes a hose connection unit 11 that connects the upper end of the shape-retaining hose 17 at a position above the holding unit 4. The hose connection unit 11 includes a hose connection port 111 for detachably attaching the upper end of the shape-retaining hose 17, an air circulation port 112 that is provided for supplying air to the shape-retaining hose 17 or discharging air from the shape-retaining hose 17 and is provided at a position above the hose connection port 111, a water supply port 113 that is connected to a third water supply pipe 155 from the water pump 3 and is provided at a vertical intermediate position between the hose connection port 111 and the air circulation port 112, and an opening / closing valve 114 that is connected to the air circulation port 112.

[0076] According to the above configuration, when water is supplied from the water pump 3 with the opening / closing valve 114 in the open state, the shape-retaining hose 17 can be easily filled with water by gravity. As water accumulates in the shape-retaining hose 17, the air that is pushed aside can be discharged without resistance from the air circulation port 112. Furthermore, the completion of filling the shape-retaining hose 17 with water can be easily determined by the fact that water, not air, comes out of the air circulation port 112. Furthermore, once filling the shape-retaining hose 17 with water is completed, inspection work by pressurization can be easily started by closing the opening / closing valve 114.

[0077] In the above embodiment, the shape-retaining hose inspection device 1 is provided with a water receiving tank 7 that receives water in the shape-retaining hose 17 that is discharged from the lower end of the shape-retaining hose 17. The water tank 2 is disposed below the water receiving tank 7. The water receiving tank 7 and the water tank 2 are connected by a water return pipe 151.

[0078] According to the above configuration, after the shape-retaining hose 17 is filled with water and inspection work is performed by pressurizing it, the water in the shape-retaining hose 17 can be returned to the water tank 2 without being discharged to the outside. This allows inspection work of the multiple shape-retaining hoses 17 stored in each of the multiple fire hydrant devices to be performed without refilling the water tank 2 with water, resulting in excellent workability.

[0079] In the above embodiment, the shape-maintaining hose inspection device 1 includes a rotation support unit 5 that supports the holding unit 4 so as to be rotatable about a vertical axis.

[0080] According to the above configuration, when the shape-retaining hose 17 taken out from the storage box of the fire hydrant device is placed in the holding unit 4, the shape-retaining hose 17 can be easily placed while being untangled. Also, the shape-retaining hose 17 can be placed in the holding unit 4 without the worker having to move his / her hands significantly. This provides excellent workability.

[0081] In the above embodiment, the holding unit 4 holds the shape-retaining hose 17 so that the winding diameter centers of the winding diameter groups G1, G2, G3, and G4 are eccentric with respect to the rotation center C1 of the rotation support unit 5, and so that all of the winding diameter groups G1, G2, G3, and G4 are arranged biased in one direction when the holding unit 4 is viewed in a plane.

[0082] According to the above configuration, when the holding unit 4 is viewed in a plan view, all the winding diameter groups G1, G2, G3, and G4 are arranged biasedly in one direction, so that on the one side, the interval between the shape-retaining hoses 17, 17 of the two adjacent winding diameter groups is small, while on the opposite side to the one side, the interval between the shape-retaining hoses 17, 17 of the two adjacent winding diameter groups is large. In the area where the interval is large, the moving distance of the shape-retaining hose 17 can be increased when the winding diameter of the shape-retaining hose 17 is shifted from the current winding diameter to the next higher winding diameter. This allows the winding diameter of the shape-retaining hose 17 to be gradually changed to the winding diameter of the next higher winding diameter group, making it easy to arrange the shape-retaining hose 17 in the holding unit 4 while changing the winding diameter.

[0083] The embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. The technical scope of the present invention is not interpreted solely by the above-described embodiments, but is defined by the claims. The technical scope of the present invention includes all modifications within the scope and meaning equivalent to the claims. [Explanation of symbols]

[0084] 1. Shape-retaining hose inspection device 2 Water tank 3. Water pump 4 Holding Unit 5 Rotation support unit 7 Water tank 11 Hose connection unit 17 Shape-retaining hose 111 Hose connection port 112 Air circulation port 113 Water supply port 114 Opening and closing valve 151 Water return pipe C1 Rotation center G1 1st winding diameter group G2 2nd winding diameter group G3 3rd winding diameter group G4 4th winding diameter group

Claims

1. The water tank includes a water pump that fills the water in the water tank into a shape-retaining hose and pressurizes the water in the shape-retaining hose, and a holding unit that holds the shape-retaining hose in a spirally wound state in the vertical direction. A shape-retaining hose inspection device.

2. the holding unit holds the shape-retaining hose in a stepped manner such that the winding diameter of each of the winding diameter groups is larger for each step, and the shape-retaining hose is divided into a plurality of winding diameter groups having mutually different winding diameters.

2. The shape-retaining hose inspection device according to claim 1.

3. a hose connection unit for connecting an upper end of the shape-retaining hose at an upper position above the holding unit; The hose connection unit includes a hose connection port for detachably attaching the upper end of the shape-retaining hose, an air circulation port for supplying air to the shape-retaining hose or discharging air from the shape-retaining hose and provided at a position above the hose connection port, a water supply port to which a water supply pipe from the water pump is connected and provided at a vertical intermediate position between the hose connection port and the air circulation port, and an opening / closing valve connected to the air circulation port.

3. The shape-retaining hose inspection device according to claim 2.

4. A water receiving tank is provided to receive water in the shape-retaining hose discharged from the lower end of the shape-retaining hose, The water tank is disposed below the water receiving tank, The water receiving tank and the water tank are connected by a water return pipe. Characterized in that 4. The shape-maintaining hose inspection device according to claim 3.

5. A rotation support unit is provided to support the holding unit so as to be rotatable about a vertical axis.

5. A shape-retaining hose inspection device according to claim 2.

6. the holding unit holds the shape-retaining hose such that a winding diameter center of the winding diameter group is eccentric with respect to a rotation center of the rotation support unit and such that all of the winding diameter groups are arranged biased in one direction when the holding unit is viewed in a plan view.

6. A hose inspection device according to claim 5.

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