JP2543643B2 - Scaffolding frame - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction frame for temporary scaffolding, which is suitable for sequentially assembling upwards.

[0002]

2. Description of the Related Art In a construction site of a building, in order to sequentially assemble the scaffolding frames upward, it is naturally necessary to provide a connecting means for connecting the scaffolding frames which oppose each other vertically.

Conventionally, as this connecting means, a connecting pin is projectingly provided at the upper end portion of the left and right vertical pipes of the scaffolding frame on the lower side,
Insert the lower ends of the left and right vertical pipes of the scaffolding frame on the upper side into this, and after that, engage a substantially arcuate locking lock arm in the engaging hole provided on the side surface between them to connect them. Ones that are connected to each other, or provided on the connecting pin by loosely fitting the connecting pin between the left and right vertical pipes of the building frame for scaffolding and rotating the connecting pin by a required angle as shown in Japanese Utility Model Laid-Open No. 1-131753 Of the type in which the projections and depressions provided on the scaffolding building frame are engaged with each other to connect the upper and lower scaffolding building frames to each other by rotating the connecting pin, or as shown in FIG. Building frame for scaffolding b
A type in which a connecting pin 2 of the vertical pipe 1 is provided with an engaging protrusion 4 which can be retracted by a spring 3 and is engaged with an engaging hole 5 of the vertical pipe 1 of the scaffolding frame a on the upper side to be connected to each other. Have been proposed.

Each of the lock arm and the engaging projection 4 is formed by a round bar-shaped member, and therefore, the engaging hole 5 for engaging the same is, as shown in FIG. 7, a round bar-shaped engaging projection. 4 is formed in a round hole shape that substantially matches 4.

[0005]

In the above-mentioned prior art, since the lock arm and the engaging projection 4 are round bar-shaped, the engaging hole 5 for engaging them is round-shaped. However, recently, in order to provide load resistance, the lock arm and the engaging projection 4 have a vertical rectangular cross section whose width in the vertical direction is larger than that in the horizontal direction as shown in FIG. Arms and engagement projections 4 tend to be used.

However, in the scaffolding frame, due to the peculiarity peculiar to this industry, the connecting pin engaging hole is still existing, that is, the scaffolding frame provided with the round hole-shaped engaging hole 5 is used. There is.

As described above, one of the engaging protrusions 4 has a vertically long rectangular shape.
On the other hand, if the engaging hole 5 with which this engages is a round hole-shaped one, it will not cause any trouble in short-term use, but this is still used in the above-mentioned mode because of this. , It has been found that when used for a long period of time, it causes the following problems.

This will be explained with reference to FIG. 9. In FIG. 9, the lower end of the upper vertical pipe 1 is fitted to the connecting pin 2 of the lower vertical pipe 1, whereby the engaging projection 4 of the connecting pin 2 is on the upper side. The spring 3 (Fig. 6) is aligned with the engagement hole 5 of the vertical pipe 1.
It shows a state in which the upper and lower vertical pipes 1 and 1 are connected to each other by being urged by and projecting into the engaging hole 5 and the upper vertical pipe 1 is connected to the connecting pin 2 in this state. The engagement protrusion 4 engages with the inner edge of the engagement hole 5 to receive the load trying to escape from the upper vertical pipe 1
Is prevented from coming out of the lower vertical pipe 1.
In particular, the lower side surface of the engaging projection 4 strongly abuts the lower inner edge 5a thereof. When the engaging projection 4 has a vertically long rectangular cross section as shown in the drawing, and the engaging hole 5 with which the engaging projection 4 engages is round hole-shaped, the abutting force described above results in both lower corners of the engaging projection 4. Portions 4a, 4a and engagement holes 5 with which they abut
Will be concentrated on the lower inner edge 5a of the engaging projection 4, and the local load on the both corners 4a, 4a of the engaging projection 4 will be caused by a large number of stages of assembling the building frame or by vibration or shock during wind work or on-site work. This further increases, and as a result, the corners 4a, 4a of the engaging projection 4 and the inner edge of the engaging hole 5 in contact with the both corners, in particular, the inner edge 5a on the lower side of the engaging projection 4 is abraded, so that the engaging projection both corners Due to the abrasion between the engagement protrusions 4a and 4a and the inner edge 5a on the lower side of the engagement hole, an unnecessary gap is generated between the engagement protrusion 4 and the engagement hole 5. Since this building frame for scaffolding is stacked in several steps in the case of building construction, even if the above-mentioned gap of 1 mm occurs in the vertical direction due to abrasion, for example, it is several cm at the top.
There is a risk of a large rattling, especially in the vertical direction between both building frames and in the interior and exterior directions of the building, which may lead to a major accident such as the collapse of the building frame.

The present invention proposes a scaffolding frame which can be safely used for a long period by improving the scaffolding frame conventionally used conventionally to solve the above-mentioned problems. That is the purpose.

[0010]

In order to solve the above-mentioned problems, the present invention is provided with the reference numerals shown in the embodiments,
According to the first aspect of the present invention, the connecting pin 13 provided with the engaging projection 14 having a rectangular cross section is provided in the vicinity of the upper ends of the left and right vertical pipes 11, 11 forming the building frame body 10. In the vicinity of the lower ends of the left and right vertical pipes 11, engaging holes 12A having a size suitable for engaging the engaging protrusions 14 and at least a lower inner edge 12a of which are linear are formed. It adopts the structure that is formed.

According to the second aspect of the present invention, a connecting pin 13 provided with an engaging projection 14 having a rectangular cross section is provided near the upper ends of the left and right vertical pipes 11, 11 forming the building frame body 10. In the vicinity of the lower end portions of the left and right vertical pipes 11 corresponding thereto, the size is suitable for engaging the engaging protrusions 14, and at least the upper inner edge 12b and the lower inner edge 12a are linear. The connecting pin engaging hole 12B is provided.

Further, according to a third aspect of the present invention, a connecting pin 13 provided with an engaging projection 14 having a vertical rectangular cross section is provided in the vicinity of upper ends of the left and right vertical pipes 11, 11 forming the building frame body 10. In the vicinity of the lower end portions of the left and right vertical pipes 11 corresponding thereto, the size is suitable for engaging the engaging protrusions 14, and the upper, lower, left and right inner edges 12a to 12d are substantially rectangular. A configuration is adopted in which a shaped connecting pin engaging hole 12C is provided.

Further, according to the present invention, the connecting pin engaging holes 12A to 12C are located in the vicinity of the lower end portions of the left and right vertical pipes 11, 11 forming the building frame body 10 on the mutually opposing surface side. The structure according to any one of claims 1 to 3 is provided by drilling each.

Further, in the fifth aspect, the connecting pin engaging holes 12A to 12C are provided in the vicinity of the lower end portions of the left and right vertical pipes 11, 11 forming the building frame main body 10 and above and below the facing interval. The structure according to any one of claims 1 to 3 is adopted, which is formed in each of the portions having the same height in the direction.

[0015]

As described above, the building frames for scaffolding are vertically stacked and connected by the connecting pin 13 in a multi-step manner, and the upper side building frame is provided on the lower side building frame to prevent the lower side building frame from coming off. The engaging projection 14 of the connecting pin 13 is engaged with the inner edge of the engaging hole 12 formed in the upper building frame. At this time, the upper building is stacked in multiple stages. A large load due to the weight of the frame, wind force, or vibration impact during field work concentrates on the lower inner edge 12a of the inner edge of the engaging hole 12 that engages with the engaging protrusion 14, and the load resistance at this portion. However, according to claim 1 of the present invention, the connecting pin 13 is provided with the engaging projections 14 having a rectangular cross section in the vicinity of the upper ends of the left and right vertical pipes 11 forming the building frame body 10. The right and left vertical pipes 1 corresponding to the
In the vicinity of the lower end portion of 1, there is formed an engaging hole 12A having a size suitable for engaging the engaging protrusion 14 and at least the lower inner edge 12a is linear, The linear lower surface 14a of the vertically elongated rectangular engaging projection 14 comes into contact with the linear lower inner edge 12a of the connecting pin engaging hole 12A, so that the abutting surfaces are in surface contact with each other, which is large. Even if a load is applied between the two, it will be evenly received over the entire surface of both, and the occurrence of abrasion or damage due to local load of line or point contact can be prevented as much as possible, and stable use can be achieved for a long period of time.

Further, since the engaging protrusions 14 which directly receive the load of the upper side building frame are formed in a vertically long rectangular cross section, sufficient load resistance is provided against a large load of the upper side building frame stacked in multiple stages. Have.

Further, due to the vibration impact of the upper building frame, the engaging projection 14 of the connecting pin 13 of the lower building frame exerts a strong contact force on the upper inner edge 12b of the inner edges of the engaging holes 12 of the upper building frame. However, according to claim 2 in this respect, the lower inner edge 1 of the connecting pin engaging hole 12B formed near the lower end portions of the left and right vertical pipes 11, 11 forming the building frame body 10 is provided.
2a is not only linear, but at least the upper inner edge 12b is also linear. Therefore, when the vertically long rectangular engaging protrusion 14 strongly abuts the engaging hole 12, The linear upper surface 14b of 14 has a connecting pin engaging hole 12B.
The upper inner edge 12b comes into contact with each other by surface contact and both are evenly received over the entire surface, so that occurrence of abrasion or damage due to local load of line or point contact can be prevented as much as possible, and stable use can be achieved for a long time. .

Further, the engaging projections 14 of the connecting pins 13 of the lower building frame are laterally left and right of the inner edges of the engaging holes 12 of the upper building frame due to the weight and vibration shock of the upper building frames stacked in multiple stages. The abutting force often acts strongly on the inner edges 12c and 12d on the side, but in this respect, according to claim 3, the building frame body 1
The connecting pin engaging holes 12C formed near the lower end portions of the left and right vertical pipes 11, 11 forming 0 are the inner edges 1 on the upper and lower portions.
Not only 2a and 12b are linear, but the inner edges 12c and 12d on the left and right sides are also linear,
When the vertically long rectangular engaging projection 14 strongly abuts on the engaging hole 12, the linear left and right side surfaces 14c and 14d of the engaging projection 14 are formed.
Are inner edges 12c, 1 on the left and right sides of the connecting pin engaging hole 12C.
Since they come into contact with 2d, they are evenly received over the entire surface, and it is possible to prevent wear and damage due to local load of line or point contact as much as possible, and to use them stably for a long period of time.

When assembling the building frame for scaffolding, the operator on the scaffolding board 15 uses a vertical pipe of the upper building frame when assembling the building frame in multiple stages or disassembling the assembled building frame. Before fitting the lower end portion to the connecting pin of the lower building frame or before pulling it out, work is performed while manipulating the engaging projections of the connecting pin with limbs. However, in the past, since the above-mentioned engagement holes were drilled on the outer surface side of the left and right vertical pipes, an operator riding on the scaffolding plate between the left and right vertical pipes can move laterally from the scaffolding plate. It was extremely dangerous in high-altitude work because it was necessary to lean out and operate the engaging projections located in the engaging holes on the outer surfaces of the left and right vertical pipes. In this respect, according to claim 4, the connecting pin engaging holes 12A to 12C are formed near the lower end portions of the left and right vertical pipes 11 forming the building frame body 10 on the mutually opposing surface sides. Since it is installed, connecting pin 1
3 can be made to protrude between the left and right vertical pipes 11 and 11 where the engagement holes 12A to 12C are located, that is, to the inner side surface side of the vertical pipe 11, which allows the operator to move from the scaffolding plate 15. It is possible to attach / detach the scaffolding frame within the plane of the scaffolding plate 15 without leaning outward, and thus the work can be performed safely.

According to the fifth aspect, the connecting pin engaging holes 12A to 12C are located in the vicinity of the lower end portions of the left and right vertical pipes 11, 11 forming the building frame body 10 and are on the upper and lower sides on the mutually opposing surface side. Since the scaffolding frames on the upper side are fitted to the connecting pins 13 of the scaffolding frame on the lower side, the upper side building frame is accurately left and right. The engaging projections 14 engage with the engaging holes 12 almost simultaneously only when they are fitted to the connecting pin 13 of the scaffolding. This allows the scaffolding frame to be accurately assembled and is almost one-touch. Since it can be connected with, workability from this aspect is also good.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state before connection of an upper scaffolding building frame a and a lower scaffolding building frame b. The scaffolding building frame is a building frame body 10 and left and right sides of the building frame body 10. It consists of the vertical pipes 11 and the scaffolding board 15 suspended between them.

A connecting pin engaging hole 12 is formed in the lower ends of the left and right vertical pipes 11, and a connecting pin 13 is attached to the upper ends of the both vertical pipes 11.

The connecting pin engaging holes 12 are formed in both vertical pipes 11,
11 are provided on the side surfaces facing each other at the same height from their respective lower end surfaces, and the connecting pin 13 has an engaging projection 14 which is biased by a spring 16 and is retractable. It is provided in a portion in the same direction as the direction of the combined hole 12. As shown in FIG. 2, the engaging projection 14 is formed by a vertically-elongated rectangular prismatic material or thick plate material having a vertical thickness that is thicker than the lateral thickness. It is designed to have durability against the load of.

As shown in FIG. 3, the connecting pin engaging hole 12 has a lower inner edge 12a which is straight, and an upper inner edge 12b and left and right lateral inner edges 12c, 12d which are arcuate. Is formed in a hole 12A for engagement, and in the embodiment shown in FIG. 4, the lower inner edge 1 thereof is formed.
2a and the upper inner edge 12b are linear, and the left and right lateral inner edges 12c, 12d are formed into arc-shaped substantially drum-shaped engagement holes 12B, and in the embodiment shown in FIG. That is, the upper, lower, left and right inner edges 12a to 12d are both formed in a substantially rectangular engaging hole 12C having a linear shape.

Therefore, by fitting the lower end of the vertical pipe 11 of the upper scaffolding frame a to the connecting pin 13 of the vertical pipe 11 of the lower scaffolding frame b, the upper vertical pipe 11 When the connecting pin engaging hole 12 and the engaging projection 14 of the lower connecting pin 13 are aligned, the connecting pin 13 is spring 16.
The upper and lower vertical pipes 11 and 11 projecting from the engaging hole 12 are connected so as not to be extracted, and the upper and lower scaffolding building frames a and b are assembled together.

Moreover, since the engaging hole 12 formed near the lower end of the vertical pipe 11 is oriented toward the scaffolding plate 15, the worker engages and disengages the connecting pin 13 engaged with the engaging hole 12. The work can be performed within the plane area of the scaffolding plate 15, and work in high places can be performed safely.

Further, even if the scaffolding frames are stacked in multiple stages and a large amount of weight is loaded on the lower scaffolding frame, the lower scaffolding frame receives vibrations and impacts of the upper scaffolding frame. However, the linear lower surface 14 of the engaging protrusion 14 having a vertically long rectangular cross section
a, linear upper surface 14b and linear left and right side surfaces 14c, 14
d is the lower inner edge 12a and the upper inner edge 1 of the engaging hole 12, respectively.
2b and the left and right lateral inner edges 12c, 12d, or all of the inner edges are in surface contact with each other, so that the abutting portions of the two do not receive a local load, and therefore the abutting portions are abraded. It can be used stably for a long period of time with almost no generation.

[0028]

According to the first aspect of the present invention, the linear lower surface of the engaging protrusion having a vertically long rectangular cross section comes into contact with the linear lower inner edge of the connecting pin engaging hole, so as to contact each other. The contact surfaces are surface contact, which means that even if a large load is applied between them, they will be evenly received over the entire area of both surfaces, and even if they are used for a long period of time, there is almost no occurrence of wear at the contact parts of both. It can be used stably for a long period of time without causing sticking.

Further, in order to provide the engaging strength between the two, the engaging projections are made of a durable material such as steel or hard iron, while the vertical pipe is made of a normal iron material. Abrasion between metals is apt to occur, but as in the present invention, the two are in surface contact with each other, so that the occurrence of abrasion can be reduced and yet the engagement strength can be increased. Can have.

Furthermore, since the engaging projections that directly receive the load of the upper side building frame are formed in a vertical rectangular shape in cross section, sufficient load resistance against the large load of the upper side building frame stacked in multiple stages is provided. Have.

According to the second aspect, even if the engaging protrusion of the connecting pin of the lower building frame acts strongly on the upper inner edge of the engaging hole of the upper building frame due to the vibration impact of the upper building frame. Since both contact each other by surface contact and both are uniformly received over the entire surface, wear of this part hardly occurs and it is used for a long time There is no rattling and it can be used stably for a long time. it can.

According to a third aspect of the present invention, the weight of the upper building frames stacked in multiple stages and the vibrational impact apply a load in the torsional direction to the lower building frames so that the engaging protrusions of the connecting pins are on the upper side. Even if the abutting force acts strongly on the inner edges on the left and right sides of the engaging hole of the building frame, the two are in surface contact with each other on the left and right side surfaces as well, so that the occurrence of wear due to local load is prevented. From the aspect, it can be used stably for a long period of time.

Further, according to the present invention, the worker can attach and detach the scaffolding frame within the plane area of the scaffolding board suspended between the left and right vertical pipes of the scaffolding frame, so that the work can be performed at high places. Work can be done safely.

According to the fifth aspect, the scaffolding construction frame can be accurately assembled, and the scaffolding frames can be connected almost with one touch, so that workability from this aspect is also good.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a perspective view of the relevant part.

FIG. 3 is a front view of the main part.

FIG. 4 is a front view of a main part of the other embodiment.

FIG. 5 is a front view of a main part of the other embodiment.

FIG. 6 is a perspective view of a conventional technique.

FIG. 7 is a front view of the same.

FIG. 8 is a perspective view of the main part.

FIG. 9 is an enlarged front view of the main part.

[Explanation of symbols]

 a, b Building frame for scaffolding 10 Building frame main body 11 Vertical pipe 12 Connecting pin engaging hole 12A Connecting pin engaging hole 12B Connecting pin engaging hole 12C Connecting pin engaging hole 12a Lower inner edge 12b Upper inner edge 12c Left and right lateral inner edges 13 connecting pin 14 engaging protrusion 14a linear lower surface 14b linear upper surface 14c linear right side surface 14d linear left side surface 15 scaffolding plate

Claims (5)

(57) [Claims] 1. Left and right vertical pipes forming a building frame body 10.
Engagement protrusions 1 having a vertical rectangular cross section near the upper ends of
Connecting pin 13 with 4 is projected, the left corresponding to this
The engaging projection 14 is provided near the lower end of the right vertical pipe 11.
A scaffolding frame having a size suitable for engagement and having at least a lower inner edge 12a formed with a linear engagement hole 12A . 2. Left and right vertical pipes that form the building frame body 10.
Engagement protrusions 1 having a vertical rectangular cross section near the upper ends of
Connecting pin 13 with 4 is projected, the left corresponding to this
The engaging projection 14 is provided near the lower end of the right vertical pipe 11.
A scaffolding frame having a size suitable for engagement and having at least an upper inner edge 12b and a lower inner edge 12a having a linear connecting pin engaging hole 12B . 3. Left and right vertical pipes forming the building frame body 10.
Engagement protrusions 1 having a vertical rectangular cross section near the upper ends of
Connecting pin 13 with 4 is projected, the left corresponding to this
The engaging projection 14 is provided near the lower end of the right vertical pipe 11.
The size is suitable for engagement, and the upper , lower, left and right inner edges 12
A scaffolding construction frame formed by forming a substantially rectangular connecting pin engaging hole 12C in which a to 12d are linear. 4. The connecting pin engaging hole12A-12C
Is the building frame body10Left and right vertical pipes that form the11, 11
Near the lower end of the
The scaffolding frame according to any one of claims 1 to 3. 5. The connecting pin engaging hole12A-12C
Is the building frame body10Left and right vertical pipes that form the11, 11
Near the lower end of the and the same in the up-down direction of the facing interval of each other
4. The method according to any one of claims 1 to 3, wherein each of the height portions is not drilled.
Building frame for scaffolding that is described as slippage.