Anti-slip device

Abstract

To provide an anti-slip device which has a high anti-slip effect and can be easily attached to and detached from a support surface having magnetism.SOLUTION: An anti-slip device 1 that is adsorbed by magnetic force to a support surface F having magnetism comprises: an anti-slip plate 10 provided, on a front surface 10a thereof, with a plurality of anti-slip bodies 11; and a magnet 20 coupled to a rear surface 10b of the anti-slip plate 10. Each anti-slip body 11 has a through-hole 12 and a projection 13 protruding from an edge 12a of the through-hole 12.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an anti-slip device, and particularly to an anti-slip device that adsorbs by magnetic force on a support surface having magnetism.

Background Art

[0002] In many places such as factory floors, steel plates are laid, and there are also places where oil is applied. In such places, there is a high risk of slipping and falling. Also, steel stairs and ladders are similarly slippery. Slipping at these places may lead to major accidents. On the other hand, the surface of the fork on which goods are placed in a forklift is usually a smooth plane made of steel. Therefore, due to braking of the forklift or the like, there is a risk that the goods may slip and fall. To prevent such accidents, various anti-slip devices have been invented.

[0003] As a conventional anti-slip device, there is known an anti-slip device for a ladder that is attached to a ladder and prevents slipping at the feet when ascending and descending (see Patent Document 1). According to the invention of Patent Document 1, since the protrusions provided on this device bite into the sole of the shoe, a high anti-slip effect is exhibited. On the other hand, this anti-slip device is configured to be attached to the ladder by screwing the holes provided in this device and the holes provided in the ladder. That is, it is necessary to perform hole processing on the ladder on the mounting side.

[0004] As another conventional anti-slip device, there is known an anti-slip device that adsorbs by magnetic force on the inner wall made of steel or the like (see Patent Document 2). The anti-slip device described in Patent Document 2 is provided with a magnet and adsorbs by magnetic force on a magnetic surface, so it is easy to attach and detach. However, the anti-slip surface of this anti-slip device is the wavy unevenness formed on the surface of a rubber plate, and since it is crushed by compression, an anti-slip effect like the protrusions that bite into the sole of the shoe cannot be expected.

[0005] As another conventional anti-slip device, an anti-slip device for a forklift fork that is attached to the fork of a forklift is known (see Patent Document 3). The anti-slip device described in Patent Document 3 is configured such that a magnet sheet and a urethane rubber sheet are overlapped and adhered, and it can be attached simply by placing it on a steel fork and removed by simply turning it up from the edge. However, since the anti-slip effect of this anti-slip device is exerted by the frictional force of the urethane rubber, an anti-slip effect like that of a protrusion cannot be expected.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0007] In view of the above problems, an object of the present invention is to provide an anti-slip device that has a high anti-slip effect and is easily detachable from a magnetic support surface.

Means for Solving the Problems

[0008] The anti-slip device according to the present invention is an anti-slip device that is adsorbed by magnetic force to a magnetic support surface, and includes an anti-slip plate provided with a plurality of anti-slip bodies on its front surface, and a magnet coupled to the back surface of the anti-slip plate, wherein the anti-slip body has a through hole and a protrusion protruding from an edge of the through hole.

[0009] According to this invention, it is possible to provide an anti-slip device that has a high anti-slip effect and is easily detachable from a magnetic support surface.

[0010] Another anti-slip device according to the present invention is characterized in that the anti-slip plate has a separation part facing the support surface with a gap therebetween.

[0011] According to this invention, an anti-slip device that can be easily removed from the support surface by utilizing the gap can be provided.

[0012] Another anti-slip device according to the present invention is characterized in that the gap is connected to the end of the anti-slip plate and a lever is inserted into the gap.

[0013] According to this invention, an anti-slip device that can apply a force in a direction away from the support surface by utilizing the lever can be provided.

[0014] Another anti-slip device according to the present invention is characterized in that the gap is arranged on the back side of one of the anti-slip bodies, a female screw part is formed on the inner circumference of the protrusion of the one anti-slip body, and a bolt for pressing the support surface is fitted into the female screw part.

[0015] According to this invention, an anti-slip device that can apply a force in a direction away from the support surface by turning the bolt can be provided.

[0016] Another anti-slip device according to the present invention is characterized in that the anti-slip plate has magnetism and the magnet is magnetically coupled to the anti-slip plate.

[0017] According to this invention, a anti-slip device in which the magnet is magnetically coupled to the anti-slip plate and adsorbs to the support surface can be provided.

Advantages of the Invention

[0018] According to the present invention, an anti-slip device that has a high anti-slip effect and is easily detachable from a magnetic support surface can be provided.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0020] Next, embodiments of the anti-slip device according to the present invention will be described with reference to the drawings. The following-described embodiments are preferred embodiments of the present invention, and thus various technically preferable limitations are imposed. However, the scope of the present invention is not limited to these aspects unless there is a description to particularly limit the present invention in the following description.

[0021] [First Embodiment] The anti-slip device 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of the anti-slip device according to the first embodiment of the present invention, and FIG. 2 is a diagram schematically showing a state where a strut is inserted into a gap in the A-A cross section of the anti-slip device according to the first embodiment of the present invention.

[0022] As shown in FIGS. 1 and 2, the anti-slip device 1 according to the present embodiment has an anti-slip plate 10 and a magnet sheet 20 as main components. In the present embodiment, the anti-slip plate 10 is coupled to the magnet sheet 20 by an adhesive tape (not shown) attached to the back surface 10b.

[0023] The anti-slip plate 10 is made of a metal plate, and a plurality of anti-slip bodies 11 are provided on the front surface 10a. The anti-slip body 11 has a through-hole 12 and a protrusion 13, and by the protrusion 13 biting into the object placed on the front surface 10a, a high anti-slip effect is exerted. That is, a strong frictional force is generated between the anti-slip plate 10 and the object placed thereon. The protrusion 13 protrudes upward substantially perpendicular to the front surface 10a from the edge 12a of the circular through-hole 12 and has a short cylindrical shape. The anti-slip body 11 is preferably formed by burring, but can also be formed by cutting or the like. Since the anti-slip plate 10 is made of metal, the protrusion 13 will not be crushed even when an object is placed on it.

[0024] Note that the anti-slip plate 10 shown in FIGS. 1 and 2 has a plate thickness of 1.2 mm, a diameter of the through-hole 12 of 6 mm, and a height of the protrusion 13 (with reference to the front surface 10a) of 1.7 mm. These dimensions can be changed as appropriate. Also, the through-hole 12 is not limited to a circular hole, and for example, it can be a polygonal hole.

[0025] The magnet sheet 20 is a flexible sheet of magnets that spreads in a planar shape, and one side is bonded to the back surface 10b of the anti-slip plate 10. The magnet sheet 20 is bonded to the anti-slip plate 10 so as to cover at least a part of the back surface 10b. The magnet sheet 20 shown in FIGS. 1 and 2 has a plate thickness of 2 mm and is an anisotropic magnet, but the plate thickness can be changed as appropriate, and it can also be an isotropic magnet.

[0026] The anti-slip device 1 is adsorbed on the magnetic support surface F by the magnetic force of the magnet sheet 20. The magnetic support surface F includes a floor surface made of steel or the like, a fork of a forklift, and the like. Since an attractive force acts between the magnet sheet 20 and the support surface F, the anti-slip device 1 can be adsorbed only by placing it on the support surface F. Since the magnet sheet 20 is adsorbed on the magnetic support surface F in a planar manner, the frictional force between them is large and it does not slip. Also, as described above, a strong frictional force is generated between the anti-slip plate 10 and the object placed thereon. Therefore, a strong frictional force is generated between the object placed on the anti-slip device 1 and the support surface F. That is, the anti-slip device 1 exhibits a high anti-slip effect.

[0027] Next, a method of removing the anti-slip device 1 from the support surface F will be described. As shown in FIGS. 1 and 2, a gap V is partially provided between the anti-slip plate 10 of the anti-slip device 1 and the support surface F. Among the anti-slip plate 10, the portion adjacent to the gap V constitutes a separated portion 10c that is separated from the support surface F. And the gap V is connected to the end 10d of the anti-slip plate 10. Therefore, as shown in FIG. 2, a lever 30 can be inserted into the gap V from the outside. By using the lever 30, a force can be applied to the anti-slip plate 10 in a direction away from the support surface F. The end 10d at which an upward force acts on the anti-slip plate 10 by the lever 30 has a sufficient distance from the end 10e on the opposite side of the anti-slip plate 10. Therefore, with the end 10e as the fulcrum and the end 10d as the point of application, the magnet sheet 20 is peeled off from the support surface F according to the principle of the lever. That is, the anti-slip device 1 is removed from the support surface F. Note that a minus driver or the like is preferably used as the lever 30, but any object that can be inserted into the gap V can be used.

[0028] [Second Embodiment] Next, the anti-slip device according to the second embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view of the anti-slip device according to the second embodiment of the present invention, and FIG. 4 is a diagram schematically showing a cross-section of one anti-slip body in the anti-slip device according to the second embodiment of the present invention. (a) is a diagram showing the B-B cross-section of FIG. 3, and (b) is a diagram showing the state where a bolt is inserted into the anti-slip body in the same cross-section as (a). Note that the anti-slip device shown in FIGS. 3 and 4 is configured to be mounted on the upper surface of the fork of a forklift. The difference between the second embodiment and the first embodiment lies in the position of the gap and the configuration of the anti-slip body on the back side thereof. Due to the difference in the configuration, the method of removing the anti-slip device from the support surface is different.

[0029] The anti-slip device 2 according to the present embodiment has an anti-slip plate 10 and a magnet sheet 20, similar to the first embodiment, and these are joined by an adhesive tape (not shown). The anti-slip plate 10 is provided with an anti-slip body 11 similar to that of the first embodiment. The magnet sheet 20 of the anti-slip device 2 is attracted by magnetic force to the support surface F, which is the upper surface of the fork of the forklift, as shown in FIGS. 3 and 4. The anti-slip plate 10 of the anti-slip device 2 according to the present embodiment has flanges 15 protruding downward from both ends in the width direction thereof. And the flanges 15 sandwich the fork in the width direction. This prevents the anti-slip device 2 from shifting in the width direction from the fork.

[0030] Among the plurality of anti-slip members 11 provided, a gap V is formed on the back side of one anti-slip member 11a as shown in FIG. 4. Among the anti-slip plates 10, the portion adjacent to the gap V constitutes a separated portion 10c that is separated from the support surface F. And an internal thread portion 14 is formed on the inner circumference of the protrusion 13 of the anti-slip member 11a. The internal thread portion 14 is configured such that the external thread portion 41 of the bolt 40 fits therein. When the bolt 40 is inserted into the inside of the protrusion 13 of the anti-slip member 11a from above and the bolt 40 is rotated, the tip 42 of the bolt 40 contacts the support surface F. And when the bolt 40 is further rotated, a force can be applied to the anti-slip plate 10 in a direction away from the support surface F. The position of the anti-slip member 11a where an upward force acts on the anti-slip plate 10 has a sufficient distance from the end 10e of the anti-slip plate 10 as shown in FIG. 3. Therefore, with the end 10e as the fulcrum and the position of the anti-slip member 11a as the point of application, according to the lever principle, the magnet sheet 20 is peeled off from the support surface F. That is, the anti-slip device 2 is removed from the support surface F.

[0031] Note that the number of threads of the internal thread portion 14 and the external thread portion 41 can be arbitrarily set. Also, it may be a multi-start thread. Although a knurl is provided on the head 43 of the bolt 40 shown in FIG. 4, an appropriate shape can be adopted for the head of the bolt 40. For example, the bolt 40 can be a T-bolt or a clamp lever. Also, it is possible to provide the internal thread portion 14 on a plurality of anti-slip members 11.

[0032] [Third Embodiment] Next, the anti-slip device according to the third embodiment of the present invention will be described with reference to FIG. 5. FIG. 5 is a diagram schematically showing a cross-section corresponding to FIG. 4 in the anti-slip device according to the third embodiment of the present invention.

[0033] The anti-slip device 3 according to the third embodiment also has a gap V formed on the back side of the anti-slip body 11a among the plurality of provided anti-slip bodies 11, similar to the second embodiment. Among the anti-slip plates 10, the portion adjacent to the gap V constitutes a separated portion 10c that is separated from the support surface F. And an internal thread portion 14 is formed on the inner circumference of the protrusion 13 of the anti-slip body 11a. In the present embodiment, as shown in FIG. 5, a set screw 50, which is a form of a bolt, is accommodated inside the protrusion 13 of the anti-slip body 11a. The external thread portion 51 of the set screw 50 is fitted into the internal thread portion 14. The set screw 50 has no head, and the total length of the set screw 50 is set shorter than the distance from the support surface F to the upper end of the protrusion 13. Therefore, even when the set screw 50 is accommodated inside the anti-slip body 11a, there is nothing protruding from the protrusion 13, and there is no obstacle when walking on the anti-slip plate 10 or placing an object on it.

[0034] A hexagonal hole 53 is formed in the upper part of the set screw 50, and the set screw 50 can be rotated with a hexagonal wrench. When the set screw 50 is rotated, the tip 52 of the set screw 50 hits the support surface F. And when the set screw 50 is further rotated, a force can be applied to the anti-slip plate 10 in a direction away from the support surface F. Thus, similar to the second embodiment, the anti-slip device 3 is removed from the support surface F.

[0035] Note that the number of threads of the internal thread portion 14 and the external thread portion 51 can be arbitrarily set. Also, it may be a multi-start thread. It is also possible to provide an arbitrary recess such as a cross hole or a slotted hole instead of the hexagonal hole 53 in the upper part of the set screw 50.

[0036] [Other Modification Examples] In the second embodiment, by turning the bolt 40 and pressing the support surface F with the tip 42 of the bolt 40, a force was applied to the anti-slip plate 10 in a direction away from the support surface F. In addition to this, after fitting the bolt 40 into the female screw portion 14, it is also possible to apply a force to the anti-slip plate 10 in a direction away from the support surface F by pulling the head 43 of the bolt 40 upward. In particular, when using a T-bolt as the bolt 40, it becomes easier to grip the head and it becomes easier to pull upward. Also, in the second and third embodiments, it is also possible to connect the gap V on the back side of the anti-slip body 11a to the end of the anti-slip plate 10. As a result, it becomes possible to remove it not only with a bolt but also with a crowbar.

[0037] In the above-described embodiment, a force in a direction away from the support surface F was applied to the anti-slip plate 10 through an object (crowbar, bolt) that contacts the support surface F from the gap V. Instead of this, it is also possible to configure it to apply a force by applying air pressure to the gap V. Specifically, the gap V located on the back side of one anti-slip body 11 is configured to be surrounded by the anti-slip plate 10, the magnet sheet 20, and the support surface F. That is, it is configured such that only the through-hole 12 is connected to the gap V. Here, when air pressure is applied to the gap through the through-hole 12 with an air gun or the like, a force can be applied to the anti-slip plate 10 in a direction away from the support surface F.

[0038] Also, in the above-described embodiment, the anti-slip plate 10 and the magnet sheet 20 were bonded with an adhesive tape, but they can be bonded by any means. The material of the anti-slip plate 10 can be arbitrarily selected, and it is also possible to use a metal having magnetism. When the material of the anti-slip plate 10 is a metal having magnetism, it is also possible to bond it with the magnet sheet 20 by magnetic force. Among the metals having magnetism, it is also possible to adopt a stainless steel having magnetism. Examples of the stainless steel having magnetism include ferritic stainless steel (such as SUS443J1) and austenite-ferritic stainless steel (such as SUS821L1). Also, the anti-slip plate 10 is not limited to a flat plate and can also be a curved plate.

[0039] When the material of the anti-slip plate 10 is a magnetic metal, it is preferable to adopt a form in which both sides of the magnet sheet 20 are magnetized (such as multi-pole on both sides). Thereby, one side of the magnet sheet 20 is coupled to the anti-slip plate 10, and the opposite surface is attracted to the support surface F. It is also possible to configure the magnetic force of the magnet sheet 20 to be different for each surface. Instead of the magnet sheet 20, it is also possible to use any magnetized magnet.

Explanation of Signs

[0040] 1, 2, 3 Anti-slip device 10 Anti-slip plate 10a Front surface 10b Back surface 10c Separation part 10d, 10e Ends 11, 11a Anti-slip body 12 Through hole 12a Edge 13 Protrusion 14 Female screw part 15 Flange 20 Magnet sheet (magnet) 30 Strut 40 Bolt 41 Male screw part 42 Tip 43 Head 50 Set screw 51 Male screw part 52 Tip 53 Hexagonal socket F Support surface V Gap

Claims

1. An anti-slip device that adsorbs to a magnetic support surface by magnetic force, comprising: An anti-slip plate provided with a plurality of anti-slip bodies on its front surface; A magnet coupled to the back surface of the anti-slip plate, The anti-slip body having a through hole and a protrusion protruding from the edge of the through hole. An anti-slip device characterized by the above.

2. The anti-slip plate has a separation portion facing the support surface with a gap therebetween. The anti-slip device according to claim 1, characterized by the above.

3. The gap is connected to the end of the anti-slip plate, And a lever is inserted into the gap. The anti-slip device according to claim 2, characterized by the above.

4. The gap is disposed on the back side of one of the anti-slip bodies, An internal thread portion is formed on the inner circumference of the protrusion of the one anti-slip body, And a bolt for pressing the support surface is fitted into the internal thread portion. The anti-slip device according to claim 2, characterized by the above.

5. The anti-slip plate has magnetism, And the magnet is magnetically coupled to the anti-slip plate. The anti-slip device according to any one of claims 1 to 4, characterized by the above.

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