JP2892349B1 - Handrail mounting device - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To mount a handrail safely and securely by a simple operation. A handrail pipe fixing device for an assembling scaffold includes a receiving member (3) supporting a handrail (2) between a support (1) and a fixing plate (4) fitted on the support (1) and riding on the handrail (2) by its own weight. It is formed as a main part. [Effect] When the handrail receives the force to lift up,
Since the fixing plate is about to rotate, a twisting action occurs, and the outer lower end and the inner upper end of the edge of the hole 41 of the fixing plate 4 receive a couple due to a moment and bite into the surface of the column, so that the fixing plate does not move. As a result, the handrail can be safely and reliably held in a fixed state on a simple mounting operation with a simple component configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail mounting device for mounting a handrail on a support, and more particularly to a technique for preventing a handrail from coming off the mounting device.

[0002]

2. Description of the Related Art For example, when assembling large structures in the shipbuilding industry or the construction industry, it is necessary to construct an enormous amount of scaffolds and to assemble handrails accordingly. For this reason,
The handrail mounting device is required to have a highly safe structure and to be capable of performing an assembling operation quickly and efficiently.

Conventionally, however, such a scaffold assembling operation is performed by using a material such as a thick wire or a strip-shaped wire, and using a wire fastening device commonly called "shino" to obtain knowledge of the scaffold. And a specialized technician who was equipped with a scaffold assembly technique. Therefore, in the conventional handrail installation work, a large amount of waste material such as wire scraps is generated at the time of dismantling, it is not easy to secure professional technicians, it takes time for assembly work, There have been various problems such as loosening, which takes time to retighten.

On the other hand, a handrail assembling apparatus that does not use a line or the like has also been proposed (see Japanese Utility Model Laid-Open No. 58-128250). In this apparatus, as shown in the publication, a handrail pipe (15) is connected to a metal (16) at a space between the columns (2).
And a support for one handrail pipe is provided on the column. Therefore, two types of fittings are required at two locations in the handrail mounting, extra assembly time is required for intermediate connection, and the pipe is easily bent at the intermediate connection portion.

Further, in the above-mentioned fixing device, as shown in FIG. 2 of the publication, a stopper (12), a pipe receiver (6), a hinge (11), and a cover (7) are complexly formed in an irregular shape. At the same time, the cover and the wedge have a sliding engagement relationship for driving the wedge (9) separately, and the structure is complicated. Although the handrail is held down by the cover via the wedge, as can be seen from FIG. 3, when the wedge integral with the cover rotates about the hinge, only the tip position of one side surface of the cover is the stopper. By stopping at the tip inner protrusion,
The handrail is prevented from slipping out. Therefore, when a strong pulling force is applied to the handrail, the stopper portion is likely to come off due to deformation of each portion.

In a construction site or the like, a handrail mounting tool having two ring-shaped portions which have a hinge at an intermediate portion and which are orthogonal to each other and connect a support and a handrail is widely used. ing. However, even with this mounting tool, work such as tightening bolts and tools are required,
Also, only one handrail can be attached to one support. Therefore, for example, when the number of handrail assembly points is enormous, such as in the shipbuilding industry, such a mounting tool has a high cost of itself, and many complicated bolting operations occur. Therefore, it is not a satisfactory railing fixture in terms of a large amount of work for installation and disassembly, and the like.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and has a small number of parts, a simple structure and a simple manufacturing method, a low cost, no special tools, and
Handrail mounting work is easy and quick, no skill is required, the handrail can be held firmly and sufficient safety can be secured, furthermore it is convenient for dismantling and reuse, no waste material and contributes to environmental conservation An object of the present invention is to provide a handrail mounting device that can be used.

[0008]

According to the present invention, there is provided a handrail mounting apparatus for mounting a handrail on a support, wherein the supported portion supported by the support and the support portion are provided. A receiving member provided with a mounting and holding portion capable of holding the handrail between the support and a handrail, a base having a hole through which the support can pass, and the handrail being the receiving member And a pressing member having at least a pressing portion protruding from a center position of the handrail when placed on the handrail.

According to a second aspect of the present invention, in addition to the above, the column is formed in a tubular shape, and a support member fixed to the column is provided, and the supported portion is a tubular portion fitted to the column. And supported by the support member so as to be rotatable around the central axis of the support.

According to a third aspect of the present invention, in addition to the features of the first aspect, the pressing portion extends to the placing and holding portion and is formed so as to be fittable with the placing and holding portion. It is characterized.

[0011]

1 to 5 show an example of a handrail pipe fixing device for an assembling scaffold as a handrail mounting device to which the present invention is applied, and an attached state thereof. The present apparatus is an apparatus for attaching a handrail 2 to a support 1, and is capable of holding a handrail between the support 1 and a cylindrical body 31 as a supported portion supported by the support 1 and the handrail 2. Bending plate 3 as placement holder
The main component is a receiving member 3 as a receiving member provided with a base 2 and a fixing plate 4 as a pressing member having a base portion 42 having a hole 41 capable of passing through the column 1 and a pressing portion 43. . The handrail 2 is composed of upper and lower two handrails 22 and 21 in the illustrated example, and both end portions thereof are attached and connected by a handrail pipe fixing device. Cylinder 3
1 and the bent plate 32 are welded to each other. These are also
The ribs 33 are also welded and reinforced.

The column 1 of this embodiment is formed in a tubular shape,
A pin 5 as a support member fixed to this is inserted into the column 1. The cylindrical body 31 is formed in a tubular shape so as to fit on the column 1, and is supported by the pin 5 so as to be rotatable around the central axis C ₁ of the column 1. Reference numeral 6 denotes a rotation receiving ring interposed between the pin 5 and the receiving member 3 for smoothing the rotation of the receiving member 3.

The pressing portion 43 of the fixed plate 4 extends to the bending plate 32 and is formed so as to be fittable with the bending plate 32 through a groove 32a formed in the bending plate 32. In this way, the holding state of the handrail 22 by the fixing plate 4 can be stably held, and the attached state of the handrail can be reliably held. In this structure, instead of providing a groove in the bending plate 32, the holding portion 43 of the fixing plate 4 may be formed in a forked shape, and the bending plate 32 may be fitted into the groove.

The fitting of this portion is for preventing the pressing portion 43 from slipping out of the groove 32a in the horizontal direction. A gap is provided between them to some extent, and the pressing portion 43 is inserted into the groove 32a. It is desirable to be able to enter and exit freely. Further, the hole 41 of the fixing plate 4 is 2-3 mm in diameter than the supporting column 1 so that the fixing plate 4 can easily enter the supporting column 1.
It is desirable that the dimensions be as large as possible.

Reference numerals 11 and 21a and 22a are respectively
It is a protection cap fitted to the upper end of the column 1 and the end of each handrail pipe. In this example, the column 1 is provided with the small projections 12, and a small recess 42a is provided in a part of the base 42 of the fixing plate 4. When the positions of the recesses and the projections match, the fixing plate 4 1 can be passed. With this structure, once the fixing plate 4 is fitted to the column 1, the fixing plate does not come off from the column unless the concave portion and the projection match, so that an auxiliary action of preventing the fixing plate from coming off occurs.
However, as described later, since the fixing plate does not come off,
Such a structure can be omitted. The above handrail pipe fixing device is easily manufactured by machining, bending, and welding.

In the handrails shown in two stages in FIG. 1 and their mounting parts, the upper one is called the handrail and the lower one is called the middle rail in a narrow sense. The device is intended for both of these. Also, handrail 2
It is needless to say that the present invention can be applied to a case where only one handrail is attached and fixed to a support at the center thereof as necessary, for example, when is long. The position of the fixing plate 4 indicated by a two-dot chain line in FIG. 4 shows such a state.

The handrail pipe fixing device for an assembled scaffold as described above is assembled and used as follows. When the column 1 is erected as a scaffolding device, the pin 5 is fitted to the column. At this time, a hammer or pliers normally carried by the worker is used as necessary. Next, the rotation receiving ring 6 and the receiving member 3 are sequentially inserted into the column, and the ends of the handrails 21 and 22 are dropped into a space formed between the column 1 and the bent plate 32 of the receiving member 3. And insert the fixing plate 4 into the support 1
The work of attaching the handrail to one pillar is completed by placing the holding part 43 on the pillar 22 and fitting it into the groove 32 a of the bending plate 32. When the small projections 12 are provided, the recesses 42a of the base 42 of the fixing plate are aligned to allow the small projections 12 to pass.

With such a very simple operation, the fixed state of one support and two handrails can be completed. In this example, since the receiving member 3 is rotatable with respect to the column 1, when the handrail is sequentially attached to a large number of standing columns, the bending plate 3 is moved in the direction of one of the railings 21.
2 can be easily matched, and the handrail 22 connected to the handrail 21 can be easily combined in the same direction. Also, if the ends of the two handrails are attached to one support in this manner, the handrail is attached to the support and the connection between the handrails is performed at the same time. It can be easier.

FIG. 6 is a diagram for explaining the operation of securely fixing the handrail by the above-described very simple device. With respect to the downward force applied to the handrail, a normal design that provides the pins 5 and the receiving members 3 with the necessary strength is sufficient, and the case where the force F for lifting the handrail is applied will be described here.

When the fixing plate 4 is dropped into the column 1, it contacts the upper end of the handrail 2 at a point P _{1 as} shown in FIG. The upper and lower end positions P ₂ of the inner and outer edges of the hole surface of the base portion 42 are slightly inclined from the horizontal line at the point P ₂ based on the gap between the column 1 and the diameter.
And contacts the outer surface of the column 1 at the points P ₃ . The distance between these contact points is approximately the radius R and 2R of the pipe, assuming that the strut and handrail are pipes of the same diameter. Therefore, the force F directly acting on the fixing plate 4 is applied to the center O of the base 42.
Can be converted into a virtual force F ′ = F acting on the center and a moment M around the center O = 2RF.

Here, F 'is a force for lifting the fixed plate 4 upward to move the handrail 2 out of the bending plate 32. The bending of the bending plate is prevented by the action of the moment M. That is, P ₂ and P ₃ of the fixed plate 4
The position has a couple F perpendicular to the line connecting them.
'= F occurs, which acts on the outer surface of the column 1. According to this couple, the parallel component force in the direction to the strut outer surface is canceled out, since a component force _F'1 perpendicular direction to the support outer surface acts in the opposite direction to the outer surface of the strut with each other, the fixed plate 4 P ₂ , P ₃
The upper and lower ends of the position tighten the outer surface of the column 1 to elastically deform and bite into it. That is, a so-called "torsion" effect occurs.

[0022] As a result, the circular convex outer surface of the strut, small strain (indentation) as shown in P ₂ portions in FIG. 6 (b) occurs. The engagement between the outer surface of the support and the end surface of the fixed plate at the minutely distorted portion applies a force opposing the lifting force F to the fixed plate 4 from the outer surface of the support to the fixed plate 4 without considering the coefficient of friction between the support and the fixed plate. Then, the fixing plate is locked to fix the handrail 2, so that the handrail is securely prevented from coming off. In this case, since the couple F'-F 'is equal to or proportional to the lifting force F as in this example, the handrail position can be fixed regardless of the magnitude of F. Note that when dismantling the device, without applying a force to _a point P,
The fixing plate 4 can be easily pulled out by pulling the base 42 upward without pulling it.

FIG. 7 shows a state in which the inventors conducted a safety evaluation test using the handrail pipe fixing device of this embodiment. (A), the mounting of the handrail 21 in handrail pipe fixing device 10 of this embodiment the posts 1 ₁ and 1 ₂ and the weight W of 70kg with 3m rope in a central portion of the handrail 22 lashing Then, a downward load test in which the weight W was freely dropped from the handrail position was performed. In this test, the center part of the handrail was bent, but no abnormality occurred in the fixing device 10 part. Therefore, the design and manufacturing safety of the device of this example was confirmed.

In (b), the handrail 22 similarly attached
Upward force F in the central position of the
= 200 kgf was applied to perform an upward load test. Also in this test, the center part of the handrail was bent at the time of the center load, but no abnormality occurred in the handrail mounting part. That is, the handrail position fixing force of the fixing plate 4 of the fixing device 10 was reliably applied, and sufficient safety of the handrail pipe fixing device was confirmed. When a large number of handrails are sequentially connected at both end portions of the handrail as in the apparatus of the present invention, the bending rigidity of the central portion of the handrail is larger than that of the conventional center connection type.

The fixing device of the present embodiment as described above has a receiving member 3 of a simple shape supported only by a column and merely receiving a handrail.
And a fixing plate 4 having an extremely simple shape having a hole and having one side extended and slightly bent, as main parts, so that its manufacture is easy, and a handrail is inserted to fix the fixing plate. The handrail can be attached by an extremely simple operation of fitting. Also, there is no need to use any special tools in this operation. Furthermore, this operation requires no skill or skill at all. Therefore, as compared with the conventional handrail mounting method, the apparatus cost can be reduced, and the mounting operation can be greatly simplified and labor can be saved.

Further, when a handrail or a support is damaged, its replacement is easy. Furthermore, after the disassembly of the handrail, the receiver 3,
The fixing plate 4 and the like can be reused. Therefore, unlike the conventional case, no waste material is generated at the time of dismantling, and it can contribute to environmental conservation. Further, since the strut tightening force automatically generated on the fixing plate with respect to the upward external force applied to the handrail as described above is used,
There is no change in the operation with time, and maintenance such as retightening is not required. In this respect, labor can be saved.

FIGS. 8 and 9 show another example of a handrail pipe fixing device for an assembled scaffold. In the example of FIG. 8, instead of supporting the receiving device 3 with the pins 5 as shown in FIG.
The rib 33 welded and integrated with the support 2 is directly attached to the support 1 by welding. Further, in the example of FIG. 9, the rib 33 is also omitted, and the lower end of the bent plate 32 of the holder 3 is directly attached to the column 1 by welding. In these examples, the configuration of the receiving member 3 can be further simplified. Even if the receiving tool 3 is changed in this manner, the same hand holding tool as that of FIG. 1 is used, so that the handrail can be similarly easily and reliably fixed. However, in these devices, since the receiving member 3 does not rotate, it is necessary to rotate the support column to match the handrail direction in advance. In addition, it is somewhat difficult to reuse the receiver 3.

FIG. 10 shows still another example of the handrail mounting device. In this example, receptacle 3 of the bending plate 32 in the groove 32a with no flat, close to the center C ₂ protrude bending plate 32 from the leading end L to expand the width of the pressing portion 43 of the fixed plate 4 handrail 2 Dimensions. Even if such a fixing plate 4 attempts to rotate in the horizontal direction, the tip L of the fixing plate 4 hits the bending plate 32 and is prevented from rotating, so that the holding portion 43 can be reliably positioned on the handrail 2. . And it has a handrail fixing function similar to that of FIG.

Although an example has been described above in which the column 1 and the handrail 2 are round pipes, the handrail mounting device of the present invention can be applied even if either or both of them are square pipes. it can. Further, even if the column is a round pipe, the hole 41 of the fixing plate 4 can be formed in another shape such as a polygon or an oval instead of a circle. Further, in FIG. 1 and the like, the handrails 2 are described as being arranged substantially horizontally. However, the handrail mounting device of the present invention can also be applied to a case where a scaffolding device or the like has a certain degree of upward or downward slope. It is. Furthermore,
The apparatus of the present invention can be used not only for temporary / permanent use.

[0030]

As described above, according to the present invention, according to the first aspect of the present invention, the receiving member can hold the handrail between the support by placing the handrail on the supported portion supported by the support and the handrail. With the mounting and holding portion, the handrail can be attached to the support via the receiving member. This operation is very simple since a handrail is simply inserted between the support and the mounting and holding portion of the receiving member. In this case, by setting the size of the mounting and holding portion to, for example, two handrails,
A handrail for a book can be attached. As a result, the two handrails can be firmly connected at the support position with a very simple operation.

Since the holding member has a base with a hole through which the strut can pass, the handrail can be put on the receiving member, and then the strut can be passed through and the holding member can be fitted into the strut. Also, at this time, since the holding section is provided at least from the center position of the handrail, the holding section is put on the handrail by the action of the weight of the holding member or the like. Since this state is realized only by passing the hole of the holding member through the column, the operation is extremely simple.

The handrail can be attached to the support simply by setting this state. That is, the handrail is put into the receiving member and is combined with the column, and at the same time, the handrail is pressed by the pressing member to prevent the handrail from slipping upward. This operation will be further described as follows.

Since the center of the handrail is located further away from the center of the support column than the outer peripheral surface of the support column, if the handrail is lifted upward so that the handrail comes out of the receiving member, for example, An upward force acts on the slide at the center position on which the receiving member rides, and this pushes up the pressing portion of the pressing member. This force can be replaced by a pushing force for lifting the holding member along the center of the column and a moment for rotating the holding member about the center of the column.

Since the holding member is not fixed and is in a free state, if only a lifting force is applied, the holding member is lifted by the force, and as a result, the handrail is also lifted and falls off the receiving member, and the handrail is moved. Does not function as a mounting device. However, since the moment acts, the holding member has a certain thickness, and further, at least a minute gap exists between the hole of the holding member and the column, so that the moment causes the edge of the hole of the holding member to The upper end on the side close to the support and the lower end opposite thereto generate a couple in the direction of cutting into the outer surface of the support.

This couple causes the holding member to be in a so-called "pry" state. That is, the contact points between the upper and lower ends of the holding member and the outer surface of the column are slightly deformed, and the pressing member bites into the column surface, albeit minutely, and the friction coefficient and the friction angle between the pressing member and the column become problems. Without both, the two will bite and become locked. When the pushing force of the handrail increases, the moment, and hence the couple, increases in proportion to the force, so that the locked state becomes tight and the pressing member does not move further. As a result, the attached state of the handrail is reliably held. Therefore, the handrail mounting device of the present invention has extremely high safety.

According to such a configuration of the present invention, a receiving member having a simple shape which is supported by the column and receives the handrail, and a simpler shape which only covers the handrail having a hole and mounted thereon. With the holding member, the handrail can be attached by an extremely simple operation of merely inserting the handrail and fitting the holding member. In this case, there is no need to use any special tool. Therefore, as compared with the conventional apparatus, the apparatus cost and the labor required for the operation can be significantly reduced. Also, no skill or skill is required for the handrail mounting operation.

Further, when a handrail or a support is damaged, its replacement is easy. Further, the handrail can be easily dismantled, and the handrail mounting device can be reused even after the dismantling, so that there is no waste material generated during dismantling as in the prior art, which contributes to environmental conservation. it can. In addition, since the self-tension of the holding member is used as described above, the operation thereof does not change with time, is maintained even if there is vibration or sway, and maintenance such as retightening is not required. Is achieved. From the above points, the handrail mounting device of the present invention is:
This is a particularly useful device in the shipbuilding and construction industries, which have a huge number of handrail mounting points.

According to the second aspect of the present invention, in addition to the above, when the column is formed in a tubular shape, the supported portion has a tubular portion fitted into the column, and the supported portion is provided. The receiving member can be rotated at any angle. A supporting member fixed to the column is provided, and the supported member is supported so as to be rotatable around the center axis of the column. Therefore, even if the supporting member is fixed, the receiving member is rotatable. become. Therefore, the handrail can be attached to the support at an arbitrary angle. As a result, the work of attaching the handrail is facilitated, and the handrail can be installed in any direction along the external shape of the product, for example, and the arrangement can be facilitated and the applicable range can be expanded.

According to a third aspect of the present invention, in addition to the first aspect of the present invention, since the protrusion of the pressing member extends to the mounting and holding portion and is formed so as to be fitted therewith, the handrail of the pressing member is provided. The holding state can be stably held. As a result, the mounting state of the handrail can be further ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a handrail pipe fixing device for an assembled scaffold to which the present invention is applied and an attached state thereof.

FIG. 2 is an exploded perspective view of the device.

FIG. 3 is a plan view of a fixing plate portion of the device.

FIG. 4 is a side view showing the handrail supporting and fixing state of the device.

FIG. 5 is a rear view showing the handrail supporting and fixing state of the device.

6A is an explanatory diagram showing a state of a force applied to a fixing plate, and FIG. 6B is an explanatory diagram showing an enlarged state of contact between a hole edge of the fixing plate and a handrail surface; .

FIGS. 7A and 7B are explanatory views showing a test state of the handrail pipe fixing device.

FIG. 8 is a perspective view showing another example of the handrail mounting device.

9A and 9B show still another example of the handrail mounting device, wherein FIG. 9A is a plan view, FIG. 9B is a side view, and FIG. 9C is a rear view.

10A and 10B show still another example of the handrail mounting device, and FIG.
Is a perspective view and (b) is a side view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Prop 2, 21, 22 Handrail 3 Receiving member (receiving member) 4 Fixing plate (holding member) 5 Pin (support member) 31 Cylindrical body (supported part, tubular part) 32 Bending plate (placement holding part) 32a Groove 41 Hole 42 Base 43 Holder C ₁ Center axis of pillar C ₂ Center of handrail

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tetsuya Sano 3-1-1 Higashi Kawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. Kobe Plant

Claims (3)

(57) [Claims] 1. A handrail mounting device for mounting a handrail on a support, comprising: a mounting / holding portion capable of holding the handrail between the supported portion supported by the support and the support with the handrail mounted thereon. A holding member having a hole that can pass through the support, and a holding portion that protrudes at least from a center position of the handrail when the handrail is placed on the receiving member. A handrail mounting device comprising: a holding member. 2. The support column is formed in a tubular shape, and includes a support member fixed to the support column, and the supported portion includes a tubular portion that fits into the support column, and is provided around a center axis of the support column. The handrail mounting device according to claim 1, wherein the handrail mounting device is supported by the support member so as to be rotatable. 3. The handrail mounting device according to claim 1, wherein the holding portion extends to the holding portion, and is formed so as to be fittable with the holding portion.