Wheel fixings, wheel devices, and temporary scaffolding

Abstract

To provide a wheel fixing device which can securely maintain a direction of a wheel or a holder, and to provide a wheel device and a temporary scaffold.SOLUTION: A wheel fixing device according to the invention is attached to a wheel module having: a support pillar; a holder which is attached to a lower end part of the support pillar so as to be rotatable around an axis of the support pillar; and a wheel rotatably attached to the holder. The wheel fixing device includes: a fixing part which is fixed to the support pillar and may be positioned around the axis of the support pillar; and a pair of sandwiching parts which is attached so as to extend from the fixing part to the holder side and may sandwich at least one of the holder and the wheel.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a wheel fixing device, a wheel device, and a temporary scaffolding. [Background technology]

[0002] In conventional carts, a holder is attached to the underside of a plate-shaped support base, fixed to rotate around an axis extending in the vertical direction, and wheels are rotatably attached to the holder. Because the holder is rotatable, the cart can easily change direction. However, when the cart needs to move straight, such as when passing through a narrow passage, the rotation of the holder can destabilize the direction of the wheels, which can actually hinder straight-line movement. Patent Document 1 therefore proposes a cart equipped with an engaging portion that can engage with the holder or wheels. The engaging portion is formed from a plate material bent into a U-shape, and by engaging with the wheel or holder, the engaging portion restricts the rotation of the holder and keeps the wheel facing in one direction. Therefore, when straight-line movement is required, the engaging portion can be engaged with the holder to smoothly move the cart in one direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-228749 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the trolley of Patent Document 1, the engaging portion is formed in a U-shape using a plate material, and therefore, when the wheel is large, the length of engagement with the holder or wheel is insufficient, and the orientation of the wheel or holder may not be maintained sufficiently. Note that this problem is not limited to trolleys, but can occur in all devices equipped with wheels. The present invention has been made to solve this problem, and aims to provide a wheel fixing device, a wheel device, and temporary scaffolding that can maintain the orientation of a wheel regardless of the size of the wheel or holder. [Means for solving the problem]

[0005] The wheel fixing device of the present invention is a wheel fixing device attached to a wheel module having a support pole, a holder rotatably attached to the lower end of the support pole around the axis of the support pole, and a wheel rotatably attached to the holder, and is equipped with a fixing portion fixed to the support pole and positionable around the axis of the support pole, and a pair of clamping portions attached to extend from the fixing portion toward the holder and capable of clamping at least one of the holder and the wheel.

[0006] In the wheel fixing device, the fixing portion can be configured to be positionable in the axial direction of the support pole.

[0007] In the wheel fixing device, the pair of clamping portions may each be formed in a rod shape.

[0008] The wheel device of the present invention comprises a wheel module having a support, a holder rotatably attached to the lower end of the support around the axis of the support, and a wheel rotatably attached to the holder, and any of the wheel fixing devices described above.

[0009] In the wheel module of the wheel device, the distance between the support and the holder can be configured to be adjustable.

[0010] The temporary scaffolding according to the present invention is a temporary scaffolding to be installed in a tunnel, and includes a plurality of first scaffolding modules each having a first support extending in the vertical direction, a first holder attached to a lower end of the first support so as to be rotatable around the axis of the first support, and a first wheel rotatably attached to the first holder and capable of contacting the inner wall surface of the tunnel, a second support connected to the first support of any of the first scaffolding modules and extending in the horizontal direction, and a first wheel attached to one end of the second support so as to be rotatable around the axis of the second support. and a wheel fixing device attached to at least one of the second supports, wherein the wheel fixing device has a fixing part fixed to the second support and positionable around the axis of the second support, and a pair of clamping parts attached to extend from the fixing part toward the second holder and capable of clamping at least one of the second holder and the second wheel.

[0011] In the temporary scaffolding according to the present invention, the posts, holders, and wheels provided on the first scaffolding module are referred to as the first posts, first holders, and first wheels, respectively, and are distinguished from the posts, holders, and wheels provided on the second scaffolding module. However, in the embodiments described below, for ease of explanation, these may not be distinguished from each other and may be simply referred to as posts, holders, and wheels in either scaffolding module. [Effects of the Invention]

[0012] According to the present invention, the orientation of the wheel can be maintained regardless of the size of the wheel or holder. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a front view showing an embodiment of a temporary scaffolding for a tunnel according to the present invention. FIG. [Figure 2] FIG. 2 is a view taken along the line AA in FIG. [Figure 3] This is a front view of the vicinity of the lower end of the first central scaffolding module. [Figure 4] FIG. 4 is a side view of FIG. 3. [Figure 5] This is a front view of the vicinity of the lower end of the first central scaffolding module. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. 10 is a front view of the second scaffolding module with fasteners attached. [Figure 10] FIG. 10 is a side view of FIG. 9. [Figure 11] FIG. 10 is a view of the second scaffolding module with the fixing device attached, seen from the first scaffolding module side. [Figure 12] FIG. 10 is a front view of the second scaffold module without fasteners attached. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of a temporary scaffolding for a tunnel according to the present invention will be described with reference to the drawings.

[0015] <1. Temporary scaffolding for tunnels> Fig. 1 is a front view of temporary scaffolding for a tunnel, and Fig. 2 is a view taken along line AA in Fig. 1. As shown in Figs. 1 and 2, this temporary scaffolding is placed inside a tunnel 10, and includes a plurality of first scaffolding modules 101, 102 extending in the vertical direction, a plurality of second scaffolding modules 201, 202 extending in the horizontal direction, a plurality of connecting struts 31-33, and a plurality of scaffolding planks 4 supported by the connecting struts 31-33.

[0016] More specifically, in this embodiment, a total of nine first scaffolding modules 101, 102 are arranged, three in the left-right direction and three in the axial direction. As shown in FIG. 1 , the first scaffolding module arranged in the center in the left-right direction (hereinafter referred to as the first central scaffolding module 101) extends in the vertical direction so as to roughly match the diameter of the tunnel 10. The first scaffolding modules arranged on the left and right of this first central scaffolding module 101 (hereinafter referred to as the first side scaffolding modules 102) have shorter lengths in the vertical direction. However, the lower ends of both first scaffolding modules 101, 102 contact the inner wall surface of the tunnel 10, and the upper ends extend to the vicinity of the inner wall surface of the tunnel 10.

[0017] 1, two second scaffolding modules (hereinafter referred to as second central scaffolding modules 201) are connected to each first central scaffolding module 101 near the center in the vertical direction, and extend to the right and left sides toward the inner wall surface of the tunnel 10, respectively, and are connected to the first side scaffolding modules 102. The ends of these second central scaffolding modules 201 are in contact with the inner wall surface of the tunnel 10.

[0018] In addition, two second scaffolding modules (hereinafter referred to as second upper scaffolding modules 202) are connected near the upper end of each first central scaffolding module 101, and extend to the right and left sides respectively toward the inner wall surface of the tunnel 10 and are connected to the first side scaffolding modules 102. The ends of these second upper scaffolding modules 202 are in contact with the inner wall surface of the tunnel 10.

[0019] As shown in Figure 2, these second scaffolding modules 201, 202 are also connected to the first scaffolding modules 101, 102 that are aligned in the axial direction of the tunnel 10. In addition, fixing devices 5 for the wheels 13 are attached to each of the second scaffolding modules 201, 202, as will be described later.

[0020] 1 and 2, a connecting support (hereinafter referred to as a lower connecting support 31) is connected near the lower ends of the first scaffolding modules 101, 102. This lower connecting support 31 is configured to connect adjacent first scaffolding modules 101, 102 that are aligned horizontally and axially.

[0021] In addition, a connecting support (hereinafter referred to as a central connecting support 32) is also arranged between the second central scaffolding module 201 and the lower connecting support 31. This central connecting support 32 is also configured to connect adjacent first scaffolding modules 101, 102 that are aligned horizontally and axially.

[0022] Furthermore, a connecting support (hereinafter referred to as an upper connecting support 33) is also arranged between the second central scaffolding module 201 and the second upper scaffolding module 202. The upper connecting support 33 is also configured to connect the adjacent first scaffolding modules 101, 102 that are aligned horizontally and axially. Note that these connecting supports 31 to 33 are formed of hollow pipes or the like.

[0023] 1 and 2, the scaffolding planks 4 described above are provided on the central connecting support 32 and the upper connecting support 33. These scaffolding planks 4 extend horizontally up to the vicinity of the inner wall surface of the tunnel 10, and workers perform their work on these scaffolding planks 4.

[0024] <2. Scaffolding Module> Next, the first scaffolding module and the second scaffolding module will be described in detail with reference to Figures 3 and 4. The first scaffolding modules 101, 102 and the second scaffolding modules 201, 202 differ only in length and the orientation in which they are arranged, but are essentially the same in configuration. Therefore, the following description will be given using the first central scaffolding module 101 as an example. Figure 3 is a front view of the vicinity of the lower end of the first central scaffolding module, and Figure 4 is a side view of Figure 3.

[0025] As shown in Figures 3 and 4, each first central scaffolding module 101 has a support 11 extending in the vertical direction, a holder 12 attached to the lower end of the support 11, and a wheel 13 attached to the holder 12.

[0026] The support 11 has a cylindrical support body 111 and a cylindrical holding member 112 fixed to the lower end of the support body 111. A female thread is formed on the inner wall surface of the holding member 112. Meanwhile, a pair of rod-shaped handles 113 extending radially outward is provided on the outer surface of the holding member 112. The handles 113 are fixed so as to extend on opposite sides of the axis of the support 11. A screw member 114, which extends in the vertical direction and has a male thread, is screwed into the female thread of the holding member 112.

[0027] 3 and 4, the holder 12 includes a holder main body 121 that is U-shaped in a side view and that holds the wheel 13. The holder main body 121 includes a rectangular upper wall portion 122 and triangular side wall portions 123 that extend downward from opposing ends of the upper wall portion 122. The wheel 13 is rotatably held between the pair of side wall portions 123. The rotation shaft 131 of the wheel 13 extends in a direction perpendicular to the axis of the support 11 and is fixed near the lower end of each side wall portion 123. The rotation shaft 131 of the wheel 13 is positioned horizontally offset from the axis of the support 11.

[0028] The lower end of the screw member 114 described above is rotatably fixed to the upper wall portion 122 of the holder body 121. In other words, the holder body 121 is rotatable relative to the screw member 114 around the axis of the support column 11.

[0029] Furthermore, a brake 125 is attached to the holder body 121. The brake 125 includes a plate-shaped brake plate 126 fixed to the holder body 121 and an operating member 127 that can press the brake plate 126. The brake plate 126 is normally positioned slightly away from the wheel 13. When the brake plate 126 is pressed by the operating member 127, the brake plate 126 comes into contact with the surface of the wheel 13, restricting the rotation of the wheel 13. The operating member 127 is attached to the holder body 121 and is rotatable about a rotation axis that extends parallel to the rotation axis 131 of the wheel 13. The operating member 127 is held in a first position where it presses the brake plate 126 and a second position where it does not press the brake plate 126. Therefore, for example, when the operating member 127 is held in the first position, the rotation of the wheel 13 can be kept restricted.

[0030] The first scaffolding module 101 configured as described above is capable of adjusting the axial position of the screw member 114 relative to the support 11 by rotating the handle 113 together with the support 11. For example, in the example of FIG. 3, the screw member 114 protrudes downward from the support 11, but when the screw member 114 is screwed into the support 11, the distance between the support 11 and the holder 12 becomes shorter as shown in FIG. 5. In this way, the axial length of the first scaffolding module 101 is adjustable.

[0031] The first central scaffolding module 101 has been described above, but the other scaffolding modules 102, 201, 202 have the same configuration except for the length of the support 11.

[0032] <3.Fixing equipment> Next, the fixing device 5 attached to the second scaffolding modules 201, 202 will be described with reference to Figures 6 to 8. Figure 6 is a plan view of the fixing device, Figure 7 is a front view of the fixing device, and Figure 8 is a side view of the fixing device. As shown in Figures 6 to 8, the fixing device 5 serves to restrict rotation of the holder 12 relative to the support 11 in the second scaffolding modules 201, 202, and includes a fixing portion 51 fixed to the support 11 and a holding portion 52 extending from the fixing portion 51 toward the holder 12.

[0033] The fixing portion 51 includes a first member 501 formed in an arc shape, a second member 502 also formed in an arc shape, and a connecting member 503 connecting the first member 501 and the second member 502. The first member 501 and the second member 502 have first end portions 511, 521 and second end portions 521, 522, respectively, and the first end portion 512 of the second member 502 is rotatably connected to the first end portion 511 of the first member 501. The first member 501 and the second member 502 are configured to contact the periphery of the support 21. A through-hole (not shown) is formed in the second end portion 522 of the second member 502.

[0034] The connecting member 503 is formed in a rod shape having a first end 513 and a second end 523. The first end 513 of the connecting member 503 is rotatably connected to the second end 521 of the first member 501. Meanwhile, a male thread is formed on the second end 523 of the connecting member 503, and is inserted into a through hole of the second member 502. In addition, a nut 514 is threadedly engaged with the second end 523 of the connecting member 503 that protrudes from the through hole of the second member 502.

[0035] With this configuration, when the support 11 is inserted into the circular space formed between the first member 501 and the second member 502 and the nut 514 is tightened, the second end 521 of the first member 501 and the second end 522 of the second member 502 come close to each other, and the fixing portion 51 is fixed to the support 21.

[0036] Next, the holding portion 52 will be described. The holding portion 52 is formed in a U-shape having a pair of rod-shaped clamping portions 551 and a connecting portion 552 that connects the upper ends of the clamping portions 551. The connecting portion 551 is fixed to the first member 501 so that both clamping portions 551 extend in the axial direction of the support 11. The distance between both clamping portions 551 is approximately the same as the width of both side wall portions 123 of the holder main body 121, so that both clamping portions 551 sandwich the holder main body 121 and the wheel 13. Furthermore, a connecting plate 56 that connects these clamping portions 551 to each other is fixed near the upper ends of both clamping portions 551. This connecting plate 56 maintains the distance between both clamping portions 551.

[0037] Next, a method for attaching the fixing device to the second scaffolding module will be described. FIG. 9 is a front view of the second scaffolding module with the fixing device attached, and FIG. 10 is a side view of FIG. 9. As shown in FIGS. 9 and 10, first, the fixing portion 51 is inserted into the support 11 of the second scaffolding module 201, 202, and then the clamping portion 551 is positioned. That is, after the holder main body 121 is positioned at a predetermined rotational position, the circumferential position of the fixing portion 51 is adjusted and the clamping portion 551 is positioned so as to clamp the holder main body 121. Thereafter, the fixing portion 51 is brought into contact with the holding member 112 of the support 11, and the nut 514 is tightened to fix the fixing portion 51 to the support 11. This fixes the positions of the holder main body 121 and the wheel 13 around the axis of the support 11. Here, as shown in FIG. 11, the clamping portion 551 is positioned so that the wheel 13 moves along the traveling direction of the tunnel 10. That is, the fixing part 51 is positioned in the circumferential direction so that both clamping parts 551 are aligned in the vertical direction.

[0038] <4. Moving the temporary scaffolding> As shown in FIG. 1, the orientation of the wheels 13 of the second scaffolding modules 201, 202 is fixed by fixing devices 5 so that they move in the axial direction of the tunnel 10. Therefore, when the entire temporary scaffolding is moved in the axial direction of the tunnel 10 (the direction of the paper in FIG. 1), the temporary scaffolding moves smoothly in the axial direction. Note that the first scaffolding modules 101, 102 are not provided with fixing devices 5, but the holder main body 121 is rotatable relative to the support 11, so that the holder main body 121 rotates as the temporary scaffolding moves, causing the wheels 13 to move in the axial direction. Alternatively, the orientation of the wheels 13 may be changed manually by a worker.

[0039] <5. Features> According to the above embodiment, the following effects can be obtained. Because the rotation axis 131 of the wheel 13 is positioned off-center from the axis of the support 11, when the support 11 is arranged to extend horizontally as in the second scaffolding modules 201, 202, the weight of the wheel 13 causes the holder 12 to rotate, causing the wheel 13 to face up and down (the rotation axis 131 of the wheel 13 extends horizontally), as shown in Fig. 12. In this state, the wheel 13 faces in a direction perpendicular to the traveling direction of the tunnel 10, which may hinder the temporary scaffolding from moving in the traveling direction of the tunnel 10.

[0040] Therefore, by providing the fixing devices 5 to the second scaffolding modules 201, 202 as described above and fixing the orientation of the wheels 13 so that they move along the traveling direction of the tunnel 10 as shown in FIG. 11 , the temporary scaffolding can be moved smoothly along the traveling direction of the tunnel 10. In particular, the pair of clamping portions 551 of the fixing devices 5 are separated, with only the connecting plate 56 provided between them. Therefore, the pair of clamping portions 551 extend along the side wall portions 123 of the holder 12 and the sides of the wheels 13, respectively, and can fix the orientation of the wheels 13 without interfering with the installation surface of the wheels 13 (the surface that comes into contact with the tunnel) or the upper wall portion 122 of the holder 12. Therefore, the orientation of the wheels 13 can be sufficiently maintained regardless of the diameter of the wheels 13 or the size of the holder 12.

[0041] Since the fixing part 51 of the fixing device 5 can move not only in a rotational position around the axis of the support 11 but also in the axial direction of the support 11, the axial position of the clamping part 521 can also be adjusted.

[0042] Furthermore, by adjusting the circumferential position of the fixing device 5, the clamping portion 521 can be made to clamp the wheel 13 directly, rather than the holder main body 121.

[0043] <6. Variations> Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications can be made without departing from the spirit of the present invention. The following modifications can be combined as appropriate.

[0044] (1) In the above embodiment, the fixing devices 5 are attached to all of the second scaffolding modules 201, 202, but it is also possible to attach the fixing devices 5 to some of the second scaffolding modules 201, 202. In addition, it is also possible to attach the fixing devices 5 to the first scaffolding modules 101, 102.

[0045] (2) In the above embodiment, the fixing portion 51 is fixed to the support 11 by fastening the fixing portion 51 to the support 11, but the method of fixing the fixing portion 51 to the support 11 is not particularly limited as long as the fixing portion 51 can be fixed so that it can be positioned at least in the circumferential direction. Also, if necessary, the fixing portion 51 can be configured to be moved and fixed to any position in the axial direction of the support 11. Also, as described above, the fixing device 5 is detachably attached to the support 11, but it can also be configured so that it cannot be removed from the support 11 as long as it is movable in the axial direction and around the axis of the support 11.

[0046] (3) In the above embodiment, the clamping portion 521 is formed in a rod shape, but as long as the holder 12 or the wheel 13 can be clamped by a pair of clamping portions spaced a predetermined distance apart, it can be formed in various configurations other than a rod shape, for example, in a plate shape.

[0047] (4) The temporary scaffolding shown in the above embodiment is an example, and the number and shape of each scaffolding module, connecting support, and scaffolding board can be changed as appropriate depending on the size of the tunnel 10 and the work content.

[0048] (5) In the above embodiment, the fixing device of the present invention is applied to temporary scaffolding, but is not limited thereto, and can be attached to various articles to fix the orientation of wheels, such as a dolly with casters or the legs of a wagon with wheels. Note that in the above embodiment, the fixing portion 51 of the fixing device 5 is fixed to the long supporting post 11, but the supporting post 11 does not necessarily have to be long, and as long as it is rotatably attached to the holder 12 of the wheel 13 and is long enough to allow the fixing portion 51 to be attached, it does not have to be long.

[0049] (6) For example, the fixing device 5 can be attached to the support 11 of a wheel module having the support 11, holder 12, and wheel 13, and these can be provided as a wheel device. In this case, the support 11 of this wheel device can be attached to various articles. [Explanation of symbols]

[0050] 101, 102 First scaffolding module 201, 202 Second scaffolding module 11 Posts 12 Holder 13 wheels 5 Fixtures 51 Fixed part 521 Clamping part

Claims

1. A wheel fixing device is attached to a wheel module having a support pole, a holder attached to a lower end of the support pole so as to be rotatable around an axis of the support pole, and a wheel attached to the holder so as to be rotatable, the holder having a pair of side walls that sandwich the wheel in an axial direction of the wheel, a fixing portion fixed to the support and positionable around an axis of the support; a pair of clamping portions attached to the fixing portion so as to extend toward the holder and capable of clamping at least the holder and the wheel; Equipped with Each of the clamping portions is formed in a rod shape and extends from the fixing portion so as to pass through each of the side wall portions, A wheel fixing device in which the ends of the clamping parts are not connected to each other.

2. The wheel fixture according to claim 1 , wherein the fixing portion is configured to be positionable in the axial direction of the support pole.

3. a wheel module including a support pole, a holder attached to a lower end of the support pole so as to be rotatable around an axis of the support pole, and a wheel attached to the holder so as to be rotatable; A wheel fixing device according to claim 1 or 2; A wheel device comprising:

4. The wheel device according to claim 3 , wherein the wheel module is configured such that the distance between the support and the holder is adjustable.

5. A temporary scaffolding installed in a tunnel, a plurality of first scaffolding modules each having a first support extending in the vertical direction, a first holder attached to a lower end of the first support so as to be rotatable around the axis of the first support, and a first wheel rotatably attached to the first holder and capable of contacting the inner wall surface of the tunnel; a plurality of second scaffolding modules each having a second support column connected to a first support column of any of the first scaffolding modules and extending horizontally; a second holder attached to one end of the second support column so as to be rotatable around the axis of the second support column; and a second wheel attached to the second holder so as to be rotatable and capable of contacting the inner wall surface of the tunnel; a wheel retainer attached to at least one of the second struts; Equipped with The wheel fixing device includes: a fixing portion fixed to the second support column and positionable around an axis of the second support column; a pair of clamping portions attached to the fixing portion so as to extend toward the second holder and capable of clamping at least one of the second holder and the second wheel; Temporary scaffolding equipped with:

Images