JP2019180558A - Overturning prevention tool and chest equipped with the same - Google Patents

Abstract

To provide a simple overturning prevention tool that can be retrofitted to a chest having a sufficient overturning prevention function without leaving a scar to a house structure and almost without impairing an outer appearance of the chest as an interior accessory.SOLUTION: An overturning prevention tool 10A is composed of a joint plate 20A and a foot plate 30A. The joint plate 20A is fixed to the back of an architrave of a chest 60 (a transparent display by a two-dot chain line) with a screw 40. A male circular column 32 provided to the foot plate 30A is rotatably inserted into a cylinder of a female circular cylinder 26 provided to the joint plate 20A. The foot plate 30A is held between the chest 60 and a floor surface, and is fixed by the deadweight of the chest 60.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a furniture fall prevention device such as a kite that can occur due to a disaster such as an earthquake or a climbing of a child.

  Conventionally, when a strong earthquake occurs, an accident has occurred in which a spear has fallen and the person who has laid it down has fallen into a serious situation. This problem is particularly important in Japan, which is called an earthquake power. In addition, as a result of the child climbing and climbing the cocoon drawer in a staircase, the casket falls and suffers a serious injury. In order to prevent such an accident in advance, it is important to reduce the risk of accidents caused by falling by taking some measures to prevent the fall of heavy bags.

  From this point of view, some of the new kites are provided with a mechanism for preventing overturning (for example, Patent Document 1). On the other hand, with respect to the ordinary general bag, various fall prevention devices that can be retrofitted are known. When the fall-prevention devices attached to the back are broadly categorized according to the principle of fall-prevention, a method of fixing a wall and a housing structure such as a wall, pillar, or moss with screws or nailing via an L-shaped bracket or a hinge (for example, a patent) Reference 2), a method of inserting a column or the like between the heel and the ceiling to fill the space above the heel (for example, Patent Document 3), and a surface with a large friction coefficient at the foot of the heel, with a slope that increases in the front direction of the heel. It can be divided into methods such as a method (for example, Patent Document 4) in which a fall prevention plate that has been devised for fall prevention is sandwiched between a basket and a floor surface.

JP-A-9-65947

JP-A-8-214968

JP-A-8-228869

JP-A-8-332131

  However, in the method of fixing by screwing or nailing, once fixed, not only is it difficult to move and remove the anchor from the place, but also a scar such as screw holes and nail marks on the housing structure. Will leave. The method of filling the space at the top of the kite greatly impairs the beauty of the kite interior. The method of sandwiching the fall-preventing plate between the fence and the floor surface does not have a sufficient fall-preventing function and is not sufficiently safe when a strong earthquake occurs. In addition, it is conceivable to use a large fall prevention device using a seismic isolation device using seismic isolation rubber, etc., but such a device is generally expensive and difficult to disseminate. It is doubtful whether it will be effective against accidents that occur when climbing on a kite.

  In view of the above-mentioned present situation, the present invention does not leave scars on the housing structure, does not substantially impair the beauty of the interior of the kite, and has a sufficient fall prevention function and can be easily attached to the kite to prevent falling over. It is an object to provide a tool and a bag provided with the tool.

In the fall prevention tool of the present invention,
A fall prevention tool such as a heel composed of at least a joint plate and a foot plate, and both the joint plate and the foot plate, at least the base material is metal or ceramics,
The joining plate has a plate surface divided by a joining plate lateral side and a joining plate longitudinal side, and when one plate surface is the joining plate surface and the opposite plate surface is the joining plate back surface, A cylindrical female cylinder with a central axis extending in the longitudinal direction of the joint plate is disposed, and a plurality of joint holes penetrating from the surface of the joint plate to the back surface of the joint plate are provided in the lateral direction of the joint plate,
The foot plate is divided into a foot plate vertical side and a foot plate lateral side, and when one plate surface is the foot plate surface and the opposite plate surface is the foot plate back side, the foot plate surface side is The male cylinder extending vertically is arranged in the range of 0.1 to 0.4 with respect to the length of the footboard vertical side from one end of the footboard vertical side,
The main feature is that the joining plate and the foot plate are rotatably combined by inserting a male cylinder into the inner space of the female cylinder.

  According to the fall prevention device of the present invention and the scissors comprising the same, the scissors are not fixed to the housing structure by screwing or nailing, so it is easy to move the scissors and leave no scar on the housing structure. . In addition, the heel of the present invention can hardly see the aesthetic appearance of the heel as an interior because the footplate of the fall-preventing tool is only slightly visible from the foot of the heel body. In addition, when the heel is moved or when visiting the customer, the footboard can be half-turned in time and the footboard is hidden behind the heel of the heel so that it looks the same as a normal heel. Furthermore, when a foot is accidentally hit against the foot plate, the impact caused by the rotation of the foot plate can be reduced.

  On the other hand, the anti-falling tool and the heel body are firmly fixed via a joining plate, and the foot plate is strongly fixed by the weight of the heel, so that the function of preventing the tumbling is sufficiently large. Moreover, since the fall prevention tool of the present invention is a relatively simple fixing tool, it can be widely spread from the viewpoint of cost.

It is the perspective view which showed the 1st aspect of the fall prevention tool of this invention. It is a perspective view of the joining board in the 1st mode of the present invention. It is a partially broken perspective view of a foot board in the 1st mode of the present invention. It is a disassembled perspective view of the fall prevention tool in the 2nd mode of the present invention. It is the perspective view which showed the 2nd aspect of the fall prevention tool of this invention. It is a perspective view of the L-shaped joining board in the 2nd mode of the present invention. It is a partially broken perspective view of the foot board in the 2nd mode of the present invention. It is a disassembled perspective view of the fall prevention tool in the 2nd mode of the present invention. It is a principal part perspective view which shows the attachment state in the 1st aspect of this invention. It is a principal part bottom view of the collar in the 1st mode of the present invention. It is an overhead view of the eyelid in the 1st mode of the present invention. It is a principal part perspective view which shows the attachment state in the 2nd aspect of this invention. It is a principal part side view which shows the attachment state in the 2nd aspect of this invention. It is a principal part bottom view of the collar in the 2nd mode of the present invention. It is a principal part bottom view of the collar in the 2nd mode of the present invention (hidden state). It is an overhead view of the eyelid in the 2nd mode of the present invention.

  Hereinafter, although the fall prevention tool of this invention and the bag of this invention which attached this fall prevention tool are demonstrated using drawing, this invention is not restricted only to the aspect demonstrated below. FIG. 1 and FIG. 5 are perspective views showing the overturn prevention device 10 of the present invention in different modes. The fall prevention tool 10 includes a joining plate 20 and a foot plate 30. The term “joined” in the name of the joining plate 20 is a member for joining and fixing the fall prevention tool 10 to the flange 60 as will be described later. However, the addition of other elements is not prohibited. The joining plate 20 and the foot plate 30 are both made of metal or ceramics at least from the viewpoint of strength, and stainless steel is preferable from the viewpoints of durability, availability, and cost. However, as will be described later, the surface of the foot plate 30 may be coated with a resin or covered with a cloth or the like. In addition, a plate (shape) is a shape in which one opposed plane has a sufficiently larger surface area than the other two opposed planes among three-dimensional shapes that are generally opposed to each other. It is a plate surface (front surface, back surface).

[First aspect]
1 to 4 illustrate a first mode of the overturn prevention device of the present invention. In the first aspect, the numbers are denoted as the fall prevention tool 10A, the joining plate 20A, and the foot plate 30A.

(Joint plate 20A)
FIG. 2 is a perspective view of the joining plate 20A. Regarding the names of each part of the joining plate 20A, for convenience, one plate surface is called the joining plate surface, the opposite plate surface is called the joining plate back surface, and the opposing sides that define the plate surface are the joining plate horizontal side and joining plate, respectively. This is called the vertical side.

  The size of the joining plate 20A can be appropriately determined according to the size of the flange 60 to be attached, etc. As an example, the joining plate 20A has a joining plate length of about 30 mm and a joining plate width of about 100 mm. .

  A female cylinder 26 is disposed on the surface of the joining plate 20A. The female cylinder 26 has a cylindrical shape as the name indicates. As shown in FIG. 2, the direction in which the center axis L3 of the female cylinder 26 extends in parallel to the longitudinal side of the joining plate is shown. As a means for joining the joining plate 20A and the female cylinder 26, it is preferable not to use an adhesive or the like but to form integrally or fuse from the viewpoint of strength. The cylinder length of the female cylinder 26 is preferably about the same as the length of the longitudinal side of the joining plate. The inner diameter of the female cylinder 26 is determined in relation to the outer diameter of the male cylinder 32 as will be described later, and is about 8 mm in diameter as an example. The outer diameter of the female cylinder 26 is about 13 mm as an example.

  The position where the female cylinder 26 is disposed is the position where the center line L1 of the joining plate vertical side of the joining plate 20A and the outer circumference circle C1 at the center of the column direction on the side surface of the female cylinder 26 are in contact with each other in the longitudinal direction of the joining plate. It is preferable to do. In the lateral direction of the joining plate, the center line of the joining plate lateral side and the side tangent of the female cylinder 26 preferably overlap each other.

  The joining plate 20A is provided with a joining hole 28 penetrating from the joining plate surface to the joining plate back surface for fixing to the flange 60 described later. A plurality of joint holes 28 are provided side by side in the lateral direction of the joint plate. If the joint hole is at one place, the fixing with the flange 60 is insufficient. In the joining plate 20A in the first mode shown in FIGS. 1 and 2, etc., a mode in which two joint holes 28 are provided is shown. It is preferable to provide a large number of the joint holes 28, because fixing to the heel body 50 with screws 40 or nails described later in all of the joint holes 28 increases the fixing force between the fall prevention tool 10A and the heel body 50. . When a plurality of joint holes 28 are provided, the joint holes 28 are provided on the joint plate longitudinal side center line L1 with appropriate intervals. The size of the joint hole 28 can be determined as appropriate based on the relationship between the shape and diameter of the screw 40 or nail used to fix the bag main body 50.

(Foot plate 30A)
FIG. 3 is a partially broken perspective view of the foot plate 30A. The foot plate 30A is a portion that is sandwiched between the heel body 50 and the floor when attached to the heel body 50 as described later. For convenience, one plate surface is referred to as the foot plate surface, the opposite plate surface is referred to as the foot plate back surface, and the sides of the plate surface are referred to as the foot plate vertical side and the foot plate horizontal side for distinction. The size of the foot plate 30A can be appropriately determined as in the case of the joining plate 20A. As an example, the foot plate vertical side is about 140 mm and the foot plate horizontal side is about 180 mm.

  A male cylinder 32 extending perpendicularly to the plate surface is provided on the foot plate surface of the foot plate 30A. The column length of the male cylinder 32 is preferably approximately the same as the cylinder length of the female cylinder 26. The outer diameter of the male cylinder 32 is set to such a length that the female cylinder 26 can be inserted freely. Specifically, the outer diameter of the male cylinder 32 is preferably 0.05 mm to 0.35 mm shorter than the inner diameter of the female cylinder 26. As an example, if the inner diameter of the female cylinder 26 is 8.0 mm, the outer diameter of the male cylinder 32 is about 7.8 mm. The position where the male cylinder 32 is arranged is preferably in a position where the line L2 connecting the centers of both foot boards and the central axis of the male cylinder 32 intersect with each other in the lateral direction of the foot board. . The foot plate vertical side is a male cylinder in the range of 0.1 to 0.4 of the foot plate vertical side length from one end when the foot plate vertical side length is set as a reference length starting from one end. Preferably 32 central axes are arranged.

  As will be described later, the foot plate back surface of the foot plate 30A is a surface in contact with the floor surface when the overturn prevention device 10A of the present invention is attached to the heel body 50. Therefore, in order not to damage the floor surface, it is preferable that at least the entire back surface of the footboard is covered with a resin or a fiber material. Specifically, the entire foot plate back surface of the foot plate 30A is coated with a resin material, or a cloth is attached. In the partially cutaway perspective view of FIG. 3, in particular, the location of the resin coating 34 is shown in a dot pattern so that the foot plate 30 </ b> A is not only on the entire back surface of the foot plate but also on the entire surface excluding the location of the male cylinder 32. It shows that the resin coating 34 is applied.

(Combination of joint plate 20A and foot plate 30A)
As shown in the exploded perspective view of FIG. 4, the joining plate 20A and the foot plate 30A are inserted in the inner space of the female cylinder 26 of the joining plate 20A by inserting the male cylinder 32 of the foot plate 30A in the first mode of the present invention. A certain fall prevention tool 10A is combined as shown in FIG. At this time, the joining plate 20A and the foot plate 30A are in a rotatable state by providing the above-described appropriate difference between the inner diameter of the female cylinder 26 and the outer diameter of the male cylinder 32. FIG. 4 also shows a screw 40 for attaching the fall prevention tool 10A to the ridge 60.

[Second aspect]
FIGS. 5-8 demonstrates the 2nd aspect which is a more preferable aspect of the fall prevention tool of this invention. In the second mode, the numbers are denoted as the fall prevention tool 10B, the joining plate 20B, and the foot plate 30B.

(L-shaped joining plate 20B)
What is characteristic in the second aspect of the present invention is that the bonding plate 20 is L-shaped. Therefore, the joining plate 20 in this embodiment will be referred to as an L-shaped joining plate 20B. FIG. 6 is a perspective view of the L-shaped joining plate 20B. For convenience, the bent portion of the L-shaped joining plate 20B is referred to as “bending side 21”, and the portion from one end side to bending side 21 is referred to as “joining plate front face 22”. The portion up to the end side is referred to as “joint plate side surface portion 24”. That is, it can also be said that the basic shape of the L-shaped joining plate 20B is that the joining plate front surface portion 22 and the joining plate side surface portion 24 are vertically joined at the bent side 21. Further, the 90 ° side surfaces of the L-shape formed by the joining plate front surface portion 22 and the joining plate side surface portion 24 are the inner side surfaces and the 270 ° side surfaces are the outer side surfaces, respectively.

  The size of the L-shaped joining plate 20B can be appropriately determined according to the size of the flange 60 to be attached, etc. As an example, the joining plate vertical side of the L-shaped joining plate 20B is about 30 mm, Among them, the lateral side of the joining plate front surface portion 22 is about 100 mm, and the lateral side of the joining plate side surface portion 24 is about 70 mm.

  A female cylinder 26 is disposed on the inner side surface of the front portion 22 of the joining plate. That is, in the second aspect of the present invention, the inner surface is the surface of the bonding plate and the outer surface is the back surface of the bonding plate. The diameter and height of the female cylinder 26 and the joining means with the joining plate are the same as in the first embodiment.

  In the longitudinal direction of the joining plate, the position where the female cylinder 26 is arranged is the same as in the first aspect, and the center direction L1 of the joining plate front side 22 of the joining plate front face 22 and the column direction of the side surface of the female cylinder 26 from the overall balance. It is preferable that the position be in contact with the central outer circumference circle C1. On the other hand, in the lateral direction of the joining plate, when the bending side 21 is the starting point and the length of the joining plate front side to the joining plate longitudinal side on the joining plate front side 22 side is the reference length, the bending side 21 It is preferable that the side tangent of the female cylinder 26 exists in the range of 0.5 to 0.8 of the lateral side length of the front side of the joining plate.

  The number of the joining holes 28 provided in the L-shaped joining plate 20B is also plural as in the first embodiment. However, in the second embodiment, more than one joint hole 28 is provided on the joining plate front surface portion 22 in the joining plate front surface portion 22 as well. One or more locations in 24. In the L-shaped joining plate 20B, which is the second mode shown in FIGS. 5 and 6, etc., two joining holes 28 are provided in the joining plate front surface portion 22 and the joining plate side surface portion 24, respectively.

  The L-shaped joining plate 20B preferably has a line-symmetric shape with the height direction center line L1 as a symmetry line. As will be described later, in the second mode, when the fall prevention tool 10B is attached to the bag main body 50, two bodies for fixing the right side surface and fixing the left side surface are used. Normally, the L-shaped joining plate 20B needs to have a symmetrical L-shaped joining plate 20B for fixing the right side and the left side, respectively. In this regard, if the L-shaped joining plate 20B has the above-described line-symmetric shape, one type can be used for both right side fixing and left side fixing.

(Foot plate 30B)
FIG. 7 is a partially broken perspective view of the foot plate 30B. The foot plate 30B in the second mode is different from the foot plate 30A in the first mode in that the length ratio between the vertical side of the foot plate and the horizontal side of the foot plate is different, and a male column 32 is provided. Is the same as described in the first embodiment. The size of the foot plate 30B can be appropriately determined as in the L-shaped joining plate 20B, but as an example, the foot plate vertical side is about 140 mm and the foot plate horizontal side is about 50 mm.

(Combination of L-shaped joint plate 20B and foot plate 30B)
As shown in the exploded perspective view of FIG. 8, the L-shaped joining plate 20B and the foot plate 30B are inserted into the inner space of the female cylinder 26 of the L-shaped joining plate 20B, thereby inserting the male cylinder 32 of the foot plate 30B. The fall prevention tool 10B is combined as shown in FIG.

[Attaching to a bag etc.]
The fall prevention tool 10 of the present invention is designed to be attached to this portion, paying attention to the fact that a portion called a pedestal 62 exists in a general rod 60. In general, the pedestal is a pedestal portion that directly contacts the floor surface of furniture such as a basket, and refers to a framed base plate that supports the furniture. In the present specification, the term “saddle etc.” means that the fall prevention tool of the present invention functions mainly as a fall prevention tool to be attached to the saddle, but it has furniture other than the saddle. For example, since it can be attached to a cupboard, the application to such furniture is not excluded. Therefore, “eaves etc.” can be rephrased as “furniture with a trolley”. Note that the heel 60 to which the fall prevention tool 10 of the present invention is attached is also one of the present invention. Therefore, for distinction, in the heel 60 of the present invention, components other than the fall prevention tool 10 (that is, a general ridge ) Is written as “Body 50”.

  FIG. 9 is a perspective view of a main part showing a state in which the overturn prevention device 10A according to the first embodiment of the present invention is attached to the bag body 50. For the sake of explanation, the wheel 62 of the bag body 50 is made transparent by a two-dot chain line in FIG. Is shown.

  The fall-preventing tool 10A according to the first aspect of the present invention is fixed at any location on the front back side of the base ring 62 of the bag main body 50. Generally, as shown in the overhead view of the cocoon 60 in FIG. As a fixing method, a nail or a screw 40 is used to fix to a predetermined portion on the back side of the wheel ring 62 through the joint hole 28 of the joint plate 20A. In the illustrated embodiment, the screws 40 are used for fixing.

  In a state where the joining plate 20A is fixed to the back side of the base ring 62, the male cylinder 32 of the foot plate 30A is inserted into the inner space of the female cylinder 26 of the joining plate 20A. When the foot plate 30A is sandwiched between the heel body 50 and the floor surface on which the heel body 50 stands, the heel 60 of the present invention in which the fall prevention function is exhibited. FIG. 10 is a bottom view of the main part of the bag 60 of the present invention, that is, the bag 60 provided with the tipping prevention tool 10A of the present invention. At this time, the heel 60 of the present invention is as shown in the bird's-eye view of FIG. 11, and although a part of the foot plate 30A can be seen from the feet of the heel body 50, it does not substantially impair the aesthetics of the design of the heel body 50. Absent.

  FIG. 12 is a perspective view of a main part showing a state in which the overturn prevention device 10B according to the second aspect of the present invention is attached to the bag main body 50, and FIG. 13 is a side view of the main part in the same state. For the sake of explanation, in FIG. 12 and FIG. 13, the carriage 62 of the bag main body 50 is shown transparent by a two-dot chain line.

  In order to generate a larger fall prevention function for the bag 60 of the second mode, which is a more preferable mode of the present invention, it is necessary to attach two fall prevention devices 10B of the present invention to the bag body 50. The fall prevention tool 10B according to the present invention is fixed at the position where one fall prevention tool 10B includes the left corner formed on the front back side and the left side back side of the wheel 62, and the other one fall prevention tool 10B. These are the right corners formed on the front back side and the right side back side of the wheel 62. The fixing method with the heel body 50 and the combination method of the L-shaped joining plate 20B and the foot plate 30B are common to the first mode. The fall prevention tool 10B is fixed not only on the front side or any side of the back side of the trolley, but also by using the corners on the back side of the trolley to fix it from the front and side. Can be firmly fixed without loosening.

  FIG. 14 is a bottom view of the main part of the bag 60 of the present invention, that is, the bag 60 provided with the tipping prevention tool 10B of the present invention. At this time, the heel 60 of the present invention is as shown in the bird's-eye view of the heel 60 in FIG. 16, and a part of the foot plate 30B can be seen from the foot of the heel body 50, but the design aesthetics of the heel body 50 are almost the same. There is no loss. Since the L-shaped joining plate 20B and the foot plate 30B are rotatably combined, the foot plate 30B can be hidden from the heel 60 as shown in the bottom view of the main part in FIG.

  As described above, since the tipping prevention tool and the kite of the present invention greatly reduce the risk of kite falling due to a disaster or the like, the industrial utility is extremely large.

DESCRIPTION OF SYMBOLS 10 Fall prevention tool 10A Fall prevention tool of 1st aspect 10B Fall prevention tool of 2nd aspect 20 Joining plate 20A Joining board of 1st aspect 20B Joining board of 2nd aspect = L-shaped joining board 21 Folding edge 22 Joining plate front face 24 Joining plate side face 26 Female cylinder 28 Joining hole 30 Foot plate 30A First mode foot plate 30B Second mode foot plate 32 Male column 34 Resin coating location 40 Screw 50 箪 笥 Body 60 箪 笥C1 Peripheral circle at the center in the column direction on the side of the female cylinder L1 Center line in the height direction of the joining plate L2 Line connecting the centers of the sides of both foot plates of the foot plate L3 Central axis of the female cylinder

Claims (8)

A fall prevention tool such as a heel composed of at least a joint plate and a foot plate, and both the joint plate and the foot plate, at least the base material is metal or ceramics,
The joining plate has a plate surface divided by a joining plate lateral side and a joining plate longitudinal side, and when one plate surface is the joining plate surface and the opposite plate surface is the joining plate back surface, A cylindrical female cylinder with a central axis extending in the longitudinal direction of the joint plate is disposed, and a plurality of joint holes penetrating from the surface of the joint plate to the back surface of the joint plate are provided in the lateral direction of the joint plate,
The foot plate is divided into a foot plate vertical side and a foot plate lateral side, and when one plate surface is the foot plate surface and the opposite plate surface is the foot plate back surface, the foot plate surface is A male cylinder extending vertically is arranged in a range of 0.1 to 0.4 with respect to the length of the footboard vertical side from one end of the footboard vertical side,
A fall prevention tool, wherein the joining plate and the foot plate are rotatably combined by inserting a male cylinder into the inner space of the female cylinder. The joining plate is an L-shaped joining plate formed in an L shape by bending vertically and extending at a bent side extending in parallel with the joining plate longitudinal side at any part of the joining plate lateral side,
A range from one of the joining plate vertical sides to the bent side is a joining plate front portion, and a range from the bent side to the other joining plate longitudinal side is a joining plate side portion, and the joining plate front portion When the 90 ° formation side with the side surface portion of the joining plate is the respective inner surface, and the 270 ° formation side is the respective outer surface,
The female cylinder is arranged on the inner surface of the front portion of the joining plate,
The overturn prevention tool according to claim 1, wherein at least one joint hole is provided in each of the joint plate front surface portion and the joint plate side surface portion.   The fall prevention tool according to claim 1 or 2, wherein at least the entire back surface of the foot plate is covered with a resin or a fiber material.   The fall prevention tool according to claim 1 or 2, wherein a diameter of the female cylinder is 0.1 to 0.3 mm longer than a diameter of the male cylinder.   On the inner side surface of the L-shaped joining plate, the side tangent of the female cylinder on the joining plate front portion starts from the bent side and extends to the joining plate longitudinal side on the joining plate front portion side. The overturn prevention tool according to claim 2, which is arranged in a range of 0.5 to 0.8 of the side length of the joining plate front portion from the bent side when the side length of the portion is a reference length.   The tipping prevention tool according to claim 2, wherein the shape of the L-shaped joining plate is a line-symmetric shape having a center line in the longitudinal direction of the joining plate as a symmetry line. The heel body is provided with at least one fall prevention tool according to claim 1,
In a state where the back surface of the joining plate of the overturn prevention tool is in contact with the front back side of the base wheel, it is fixed to the back side of the base wheel base through the joint hole of the joint plate by a nail or a screw,
The heel, wherein the foot plate of the fall prevention tool is sandwiched between the heel body and a floor on which the heel body stands. The heel body is provided with two fall prevention devices according to claim 2,
With the outer surface of the L-shaped joining plate of one body of the fall prevention tool in contact with the front rear side and the left side rear side of the base wheel, the nails or screws are used to pass through the joint holes of the L-shaped joining plate. It is fixed to the back side of the main body wheel,
With the outer surface of the L-shaped joining plate of the other one of the fall prevention devices in contact with the front back side and the right side back side of the base wheel, the joining hole of the L-shaped joining plate is formed with a nail or a screw And is fixed to the back side of the gantry body through
A scissors characterized in that the foot plates of the two fall prevention devices are sandwiched between the scissors main body and a floor surface on which the scissors main body stands.

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