Winding device for floor sheet

Abstract

To provide a winding device of a floor sheet capable of easily eliminating wrinkles generated when winding the floor sheet, with a simple structure and at low cost.SOLUTION: This winding device 1 for the floor seat is provided with a laterally long truck 2 rotatably provided with wheels on the right and left sides, a winding shaft 3 laterally and horizontally journaled to the truck 2 and rotated by interlocking with the wheels of the truck 2, and a guide roller 4 rotatably provided in parallel to the winding shaft 3 in front of the winding shaft 3. By moving the carriage 2 forward while rotating the wheels, a long floor sheet laid on the floor can be wound by the winding shaft 3 after being guided on the guide rollers 4. In the winding device 1 for the floor sheet, the guide roller 4 is formed in a quadrangular prism shape.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a winding device for manually winding up a long floor sheet laid on the floor of an indoor sports facility such as a dome stadium or gymnasium during removal work. [Background technology]

[0002] In recent years, an increasing number of events have been held at indoor sports facilities such as dome stadiums and gymnasiums. During these events, floor sheets are laid to protect the floor from dirt, scratches, and the like. That is, floor sheets are laid on the floor in preparation for the event and then removed after the event. While floor sheet removal is performed relatively frequently, it is not easy to secure manpower for the task each time. Therefore, there is a demand for a reeling device that can be easily performed by one person and that can neatly reel in the floor sheet. One such reeling device includes a horizontally elongated cart that is wider than the floor sheet, a reeling shaft that is rotatably mounted on the cart via rolling wheels that engage with the wheels of the cart and reels in the floor sheet, a guide roller that is rotatably attached to the front of the cart via an arm and that guides the floor sheet to the reeling shaft, and a handle provided at the rear of the cart for manual pushing.

[0003] When winding up a floor sheet using the winding device described above, first, the winding shaft around which the end of the floor sheet laid on the floor is wound is passed over the guide rollers from the front of the dolly and placed on the rolling wheels that are linked to the wheels of the dolly. As a result, the floor sheet laid on the floor is guided to the winding shaft while resting on the guide rollers. In this state, when the handle is manually pushed to move the dolly forward, the rotation of the wheels is transmitted to the winding shaft via the rolling wheels, causing the winding shaft to rotate. As a result, the floor sheet is placed on the guide rollers and guided while being wound up onto the winding shaft one by one.

[0004] However, in conventional winding devices, the floor sheet is wound up while the cart is manually pushed forward, which can cause the cart to meander. When the cart meanders, wrinkles can occur in the floor sheet that is placed on the guide roller attached to the front of the cart and guided to the winding shaft. This occurs because the axial movement of the floor sheet is restricted on the guide roller. If the wrinkled floor sheet is wound onto the winding shaft, it can cause uneven winding, such as a bamboo-like shape. Therefore, the applicant proposed a winding device that uses floating rollers as guide rollers as a measure to prevent wrinkles from occurring in the floor sheet when the cart meanders (Patent Document 1). The floating roller is made up of multiple short rollers arranged axially, and these short rollers rotate while moving slightly axially. Therefore, the floor sheet placed on the floating roller and guided to the winding shaft is not restricted in its axial movement, so even if the cart snakes while traveling, it can be wound onto the winding shaft with wrinkles suppressed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-307164 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the winding device using the floating roller of Patent Document 1 described above requires multiple short rollers lined up in the axial direction, which increases the number of components and makes the structure complex, resulting in problems such as increased maintenance time and manufacturing costs.

[0007] The object of the present invention is to solve the problems of the conventional winding devices described above, and to provide a winding device equipped with guide rollers that has a simple structure, is low cost, and can easily eliminate wrinkles that occur when winding up floor sheets. [Means for solving the problem]

[0008] Among the present inventions, the invention described in claim 1 is a floor sheet winding device comprising a long cart with rotatable wheels on the left and right, a winding shaft supported horizontally on the cart and rotating in conjunction with the wheels, and a guide roller rotatably mounted in front of the winding shaft so as to be parallel to the winding shaft, and by rotating the wheels and moving the cart forward, a long floor sheet laid on the floor is guided onto the guide roller and then wound up by the winding shaft, characterized in that the guide roller is a polygonal pillar.

[0009] The invention as set forth in claim 2 is characterized in that in the invention as set forth in claim 1, the guide roller is a quadrangular prism-shaped body.

[0010] The invention described in claim 3 is characterized in that, in the invention described in claim 1 or 2, the guide rollers are attached to a pair of arms that protrude forward from the left and right sides of the cart. [Effects of the Invention]

[0011] The floor sheet winding device (hereinafter simply referred to as the winding device) described in claim 1 has a guide roller that is a polygonal columnar body (i.e., a rod-shaped body whose outer periphery is formed with alternating long corners and flat portions in the axial direction), and is configured so that when the guide roller rotates, the distance from the center of rotation of the guide roller to its upper end changes (i.e., a difference in height occurs when the corners are located at the upper end and when the flat portion is located at the upper end). Therefore, when the floor sheet passes over the guide roller and is guided to the winding shaft, if the guide roller rotates in accordance with the movement of the floor sheet (due to frictional force with the floor sheet), vibrations are imparted to the floor sheet due to the change in the distance from the center of rotation of the guide roller to its upper end (height difference). Therefore, even if wrinkles occur in the floor sheet, the wrinkles can be eliminated by the vibration on the guide roller, and the floor sheet can then be wound into a neat roll on the winding shaft. In addition, the winding device described in claim 1 can be constructed by replacing the conventional cylindrical guide roller with a polygonal pillar-shaped one, so it can be manufactured cheaply and easily, and its simple structure makes it easy to maintain.

[0012] In the winding device described in claim 2, the guide roller is a square pillar-shaped body, so that it can be manufactured at extremely low cost by using commercially available so-called square pipes or the like.

[0013] In the winding device described in claim 3, the guide rollers are attached to a pair of arms that protrude forward from the left and right sides of the cart, so that by increasing the distance between the guide rollers and the winding shaft, wrinkles that occur in the floor sheet can be more effectively eliminated. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 4 is an explanatory diagram (side view) showing the operation of the guide roller. DETAILED DESCRIPTION OF THE INVENTION

[0015] <Configuration of the winding device> An embodiment of a winding device according to the present invention will be described in detail below with reference to Figures 1 to 5. Figure 1 is a perspective view of the winding device according to the present invention, and Figure 2 is a side view of the same. The winding device 1 is composed of a horizontally long cart 2 that is wider than the floor sheet S, a winding shaft 3 that is rotatably placed on the cart 2 and winds up the floor sheet S, a guide roller 4 that is rotatably attached to the front of the cart 2 and guides the floor sheet S to the winding shaft 3, and a handle 5 for pushing the cart 2 provided at the rear.

[0016] The dolly 2 is formed by combining left and right side frames 2a, 2b and a rear frame 2c into a U-shape in plan view (with the upper edges wider from side to side), with the interior space being slightly wider than the floor sheet S. Wheels 6 are attached to each of the side frames 2a, 2b, and a caster 7 is attached to the lower center of the rear frame 2c. Two rolling wheels 8, 8 are arranged (pivotally mounted) inside each of the side frames 2a, 2b, side by side in the direction of travel of the dolly 2. The rolling wheels 8, 8 are connected to the wheels 6 via a transmission member (not shown) such as a chain.

[0017] Furthermore, vertical notches with arc-shaped lower ends are formed in the left and right side frames 2a, 2b of the bogie 2. Furthermore, long, flat-plate-shaped arms 9, 9 are provided on the left and right sides of the bogie 2 in parallel so as to protrude diagonally forward from the bogie 2. The base ends of the flat-plate-shaped arms 9, 9 are located below the notches formed in the left and right side frames 2a, 2b of the bogie 2, and each arm 9, 9 is inclined upward at an angle of approximately 10° toward the front.

[0018] On the other hand, the winding shaft 3 is formed in a cylindrical shape that is about 10 to 50 mm longer than the width of the floor sheet S, and both left and right end edges are engaged with notches formed in the left and right side frames 2a, 2b of the cart 2. In addition, both left and right end portions of the winding shaft 3 are rotatably placed on the left and right rolling wheels 8, 8.

[0019] 3 is a perspective view of the guide roller 4, and FIG. 4 is a side view of the same. The guide roller 4 has a length (50 to 100 mm) that is sufficiently longer than the width of the floor sheet S and is formed in the shape of a square pillar. The guide roller 4 is rotatably suspended (pivoted) at the tips of arms 9, 9 that protrude diagonally forward from the left and right sides of the cart 2, and is disposed parallel to the winding shaft 3. The height position of the axis (center of rotation) of the guide roller 4 coincides with the height position of the axis center of the winding shaft 3, and the distance between the axis center of the guide roller 4 and the axis center of the winding shaft 3 is approximately 380 mm.

[0020] In addition, a pair of left and right guide plates 4a, 4a are fixed to the left and right axial edges of the guide roller 4 (approximately 200 mm inward from each of the left and right ends) at an interval slightly longer (approximately 5 to 10 mm longer) than the width of the floor sheet S to guide the floor sheet S, which has been guided onto the guide roller 4 from the front, to the winding shaft 3 at the rear in a fixed position. The guide plates 4a, 4a are movable along the axial direction according to the width of the floor sheet S to be wound up.

[0021] <Operation of the winding device> Next, we will explain the operation of the above-mentioned winding device 1. When winding up the floor sheet S with the winding device 1, first, the winding shaft 3 around which the end of the floor sheet S laid on the floor is wound is passed over the guide roller 4 from the front of the dolly 2 and placed on the left and right rolling wheels 8, 8 arranged on the side frames 2a, 2b of the dolly 2. As a result, the floor sheet S laid on the floor is guided to the winding shaft 3 while resting on the guide roller 4.

[0022] In this state, when the handle 5 is manually pushed to move the cart 2 forward, the rotation of the wheels 6 (counterclockwise in FIG. 2) is transmitted to the left and right rolling wheels 8, 8... via a transmission member (not shown), causing the left and right rolling wheels 8, 8... to rotate in the opposite direction to the wheels 6 (clockwise in FIG. 2). Furthermore, when the left and right rolling wheels 8, 8... rotate in this manner, the winding shaft 3 (the winding shaft 3 that has wound up the end of the floor sheet S) placed on the rolling wheels 8, 8... rotates in the opposite direction to the rolling wheels 8, 8... (counterclockwise in FIG. 2). Due to this rotation of the winding shaft 3, the floor sheet S passes over the guide roller 4 and is guided to the winding shaft 3 and wound up sequentially.

[0023] As described above, when the cart 2 is traveling forward, if the cart 2 meanders from side to side (see the arrows in Figure 1), this may cause wrinkles in the floor sheet S. In such a case, the winding device 1 vibrates the floor sheet S with the guide roller 4 to eliminate the wrinkles in the floor sheet S, and then guides the floor sheet S to the winding shaft 3, thereby enabling it to be wound into a neat roll.

[0024] FIG. 5 illustrates how the guide roller 4 vibrates the floor sheet S. When the winding of the floor sheet S begins with the rotation of the winding shaft 3, the guide roller 4, which has the floor sheet S placed on it (holding it), rotates (rotates clockwise in FIG. 5) due to the frictional force generated between the guide roller 4 and the floor sheet S. Then, when the guide roller 4 rotates and the corner C is positioned on the upper side, the floor sheet S is lifted upward by the corner C (see FIG. 5(b)). When the guide roller 4 further rotates and the flat portion F is positioned on the upper side, the floor sheet S that was lifted upward descends (see FIG. 5(c)). When the guide roller 4 continues to rotate and the corner C is positioned on the upper side, the floor sheet S is lifted upward again.

[0025] As described above, when the guide roller 4 rotates, the floor sheet S moves up and down continuously (i.e., vibrates) on the guide roller 4 by the height difference t (see FIG. 5(a)) between the corner C and the flat surface F. This vibration eliminates wrinkles in the floor sheet S, making it possible to wind the floor sheet S into a neat roll (i.e., without the occurrence of bamboo-like knots or slack).

[0026] <Experimental Example> Below, we will show the results of actually manufacturing a winding device 1 and performing winding work on a floor sheet S. In manufacturing the winding device 1, a commercially available 40 mm square pipe was used as the guide roller 4. The height difference t between the corner C and the flat portion F of the guide roller 4 was adjusted to about 8 mm. In addition, the arms 9, 9 to which the guide roller 4 is attached were adjusted so that the tip side was inclined upward at about 12.5° relative to the floor surface, and the center of the guide roller 4 and the center of the winding shaft 3 were at approximately the same height.

[0027] When the winding device 1 configured in this manner was used to wind up a 1200 mm wide floor sheet S, even when wrinkles occurred in the floor sheet S as the trolley 2 snaked left and right, the up and down vibration of the floor sheet S on the guide roller 4 made it possible to completely eliminate the wrinkles and wind up the floor sheet S into an extremely neat roll.

[0028] Furthermore, rectangular guide rollers of various diameters (20 to 80 mm square) were attached to the winding device, and winding experiments were conducted on floor sheets S of various widths (1100 to 1370 mm).As a result, it was found that adjusting the height difference of the guide roller relative to the width W (mm) of the floor sheet (i.e., t / W) to a range of 0.005 to 0.01 is preferable because it makes it possible to effectively eliminate wrinkles that have occurred in the floor sheet S, and that adjusting t / W to a range of 0.006 to 0.007 is even more preferable because it makes it possible to even more effectively eliminate wrinkles that have occurred in the floor sheet S.

[0029] <Example of change in winding device> In the above embodiment, a winding device using a guide roller in the shape of a rectangular prism is shown. However, the guide roller can also be polygonal, such as a triangular prism or a hexagonal prism, or star-shaped in side view. However, the more corners there are (the closer to a circle), the smaller the difference in height between the flat portion and the floor sheet, making it more difficult to apply vibration to the floor sheet. Furthermore, since processing is more difficult when the side view shape has many corners or a star shape, it is preferable to use a square prism-shaped roller with as few corners as possible and which is easier to process. Furthermore, the guide roller may be columnar (rod-shaped) or cylindrical, but cylindrical is preferable in terms of weight and processing. For example, using a commercially available square pipe is preferable because it allows the winding device to be constructed inexpensively.

[0030] Furthermore, the winding device according to the present invention is not limited to the above embodiment in which the guide rollers are attached to a pair of arms provided on the left and right sides of the dolly, but may be one in which the guide rollers are attached directly to the dolly. Furthermore, the winding device according to the present invention is not limited to the above embodiment in which the height position of the axis (center of rotation) of the guide roller and the height position of the axis center of the winding shaft are aligned, but may be one in which the height positions of the axis centers of the guide roller and the winding shaft are offset (i.e., the height position of the axis center of the guide roller is higher than the height position of the axis center of the winding shaft). However, if the difference in height between the axis centers of the guide roller and the winding shaft exceeds 50 mm, the so-called wrap angle of the floor sheet on the guide roller becomes large, which impairs the function of eliminating wrinkles caused by vibration of the floor sheet, and is therefore undesirable. In other words, it is preferable to adjust the difference in height between the axis of the guide roller and the axis of the winding shaft to a range of 0 to 50 mm, as this will more effectively eliminate wrinkles in the floor sheet caused by vibration.

[0031] In addition, the winding device according to the present invention is not limited to the above embodiment in which the distance between the axis of the guide roller and the axis of the winding shaft is adjusted to approximately 380 mm, and the distance between the axis of the guide roller and the axis of the winding shaft can be changed as needed, but if the distance between the axis of the guide roller and the axis of the winding shaft is too narrow, it becomes difficult to sufficiently remove wrinkles from the floor sheet on the guide roller before guiding it to the winding shaft, which is undesirable. Conversely, if the distance between the axis of the guide roller and the axis of the winding shaft is too wide, it becomes difficult to design a compact winding device, which is also undesirable. Therefore, in the winding device according to the present invention, it is preferable to adjust the distance between the axis of the guide roller and the axis of the winding shaft to 300 to 500 mm. [Industrial Applicability]

[0032] The floor sheet winding device according to the present invention has the excellent effects as described above, and can therefore be suitably used as a device for winding up a long floor sheet laid on a floor surface. [Explanation of symbols]

[0033] 1 Winding device 2 carts 2a, 2b Side frame 2c Rear Frame 3 Winding shaft 4 guide rollers 4a Guide plate 5 Handle 6 wheels 7 Caster 8 Rolling wheels 9 Arm C Corner F flat area t Height difference S Floor Sheet

Claims

1. A horizontally long cart with rotatable wheels on the left and right, A winding shaft that is supported horizontally on the carriage and rotates in conjunction with the wheels; a guide roller rotatably provided in front of the winding shaft so as to be parallel to the winding shaft, A floor sheet winding device that moves the cart forward while rotating the wheels, thereby guiding a long floor sheet laid on the floor onto the guide rollers and then winding it up around the winding shaft, A floor sheet winding device characterized in that the guide roller is a polygonal pillar-shaped body.

2. 2. The floor sheet winding device according to claim 1, wherein the guide roller is a rectangular pillar-shaped body.

3. 3. The floor sheet retractor according to claim 1, wherein the guide roller is attached to a pair of arms provided so as to protrude forward from the left and right sides of the cart.

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