JPH01268970A - Net hanger for construction field - Google Patents

Abstract

PURPOSE:To facilitate loading by coupling a first member having a fixed hook part and a anchor tool with a second member having an opening and closing hook part with a fixed means and a net anchor tool, and fixing to the lower flange of a steel beam. CONSTITUTION:A first member 11 having a fixed hook part 11a and a net anchor tool 13a is coupled with a second member 12 having an opening and closing hook 15 with a fixed means 14 and a net anchor tool 13b in a suitable size at a specific position by a connecting means 16 after making a slide adjustment. The opening and closing hook part is closed upon fitting the opening and closing hook part 15 of the second member 12 in as an opening state in the lower flange 2a of a steel beam 2, and the opening state is fixed by the fixed means 14. After that, a net 3 is anchored by the anchor tools 13a and 13b to stretch. According to the constitution, the security can be increased.

Description

[Detailed Description of the Invention] Emperor Chestnut Retired Emperor Card Ice! The present invention relates to a net hanger used to stretch a net between beams at a building construction site to prevent workers, construction materials, tools, etc. from falling.

Conventional technology Generally, at a construction site, steel columns (1) connected to the foundation are placed at the corners of a square section at predetermined intervals (e.g., 6 to 9 m intervals), as shown in Fig. 10, and each steel column is Between the pillars (1), steel beams (2) that will serve as the ceiling and floor are connected at appropriate heights, and on each floor, nets (3) as shown in Figure 11 are installed in the grid-like areas. , the center and appropriate length of its four corners and sides [
For example, they are strung up via hanging handles every 3 m.

The net (3) has ropes (4) made of nylon or the like having a diameter of about 12φ inserted around the net (3), and hanging rings (4a) are formed by the ropes (4) at the four corners. The four corners are stretched using the hanging ring (4a), and the middle of each side is suspended using the rope (4).

A steel beam (2) is used to suspend the net (3), but since the top surface of this steel beam (2) is used as a walking path for workers, it may be a nuisance if the hanging tools, etc. are protruded. Therefore, it is necessary to use the bottom side for hanging.

The steel beam (2) is usually made of H-shaped steel as shown in Figure 8.
It is used with the flange surface facing up and down, and the net (3) is hung using the lower flange.

Net (3) is usually used to reduce the impact of falling objects.
As shown in Figure 12, if the net (3) is stretched with a slight sag and is simply hooked to the outer edge of the lower flange, the net (3) will expand and contract greatly due to the impact of falling objects, etc. This can cause the hook-like hanger to become disengaged from the outer edge of the lower flange. Therefore, conventionally, as shown in FIG. 12, a roughly J-shaped clamp member (5) having a lock handle (5a) of a screw type or the like is attached and fixed to a flange, and a hook (5) is attached to this clamp member (5). A net (4) is installed through the net (6).

Problems that Akira is trying to solve: Since the conventional clamp member (5) described above is only locked to the outer edge of the lower flange of the steel beam (2) made of H-shaped steel, the lock handle (5a) If it is loose, there is a risk of it coming off, so of course when wearing it,
It is necessary to check the locked state of the lock handle (5a) every morning, which is extremely troublesome, and improvements are desired.

Ideally, a substantially flat horizontal C-shaped clamp member should be used to fit across the inner and outer edges of the lower flange of the steel beam (2), but such a shape would not work as it is. It cannot be fitted into a flange and must have a structure that allows at least one end to be opened and closed.

On the other hand, many types of H-beams used for steel beams (2) are used, even if they are standardized products with slightly different dimensions such as flange width, wall thickness, and height.

Therefore, in order to use the above-mentioned substantially flat horizontal C-shaped clamp member, it is necessary to create and selectively use many types of clamp members that match each standard product size of H-shaped steel.

The present invention was developed in view of the above-mentioned problems of the prior art, and its purpose is to rationally solve problems such as improving safety, simplifying installation work, sharing various sizes, and reducing weight. This is an attempt to provide a net hanger that makes it possible.

Means for Unraveling IIB In order to achieve the above object, the present invention provides a hook having a fixed hook portion and a net locking device at one end for locking to an example edge of a lower flange of a steel beam made of H-shaped steel. 1 member and
a second member having at one end an opening/closing hook portion with a fixing means for locking to the other side edge of the flange and a net locking device; and the other ends of the first member and the first second member in the width direction of the flange. The first member and the second member are fitted with a connecting means that can be slidably adjusted to connect the two members at a predetermined position. It is equipped with a clamping means for closely clamping the lower flange.

Further, one of the first member and the second member is provided with a long hole along the sliding direction, a plurality of large diameter positioning holes are arranged on the long hole at appropriate intervals, and the other member is provided with a long hole along the sliding direction. A connecting pin having a large diameter portion that fits into the positioning hole and a small diameter portion that slides the long hole portion is installed, and the former member is constantly pressed onto the connecting pin toward the large diameter portion of the connecting pin. It is equipped with a spring.

Furthermore, the opening/closing hook part is pivotally attached to the end of the second member via a pivot, and has a position on the pivot where it can be opened and closed by engaging with and detached from the end of the lower flange of the steel beam, and a position where the opening/closing hook part can be opened and closed in the closed state. It is configured to be movable in the axial direction so as to be able to take a fixed position in which it abuts a stopper provided at the end of the two members, and is always pressed against the fixed position by a spring.

The vertical first member and the second member are slid and adjusted to fit the lower flanges of the steel beams made of H-shaped steel of each size, and are connected at the matching positions. Since the size of the H-beams used at each construction site is immediately known, the required number of steel bars are adjusted by sliding them on the ground to the appropriate size, and then lifted onto the steel frame and installed in the required locations. This mounting operation is performed by closing the opening/closing hook portion of the second member, fitting it into the lower flange in a closed state, closing the opening/closing hook portion, and fixing this state with a fixing means.

The clamping means makes the attachment more secure.

Slide adjustment of the first member and the second member is performed on the connecting pin.
Press one member against the spring toward the small diameter part of the connecting pin with your finger to align the elongated hole with the small diameter part of the connecting pin, then slide both members to position the desired positioning hole. If you stop it and release your hand, the large diameter part of the connecting pin will match the positioning hole due to the restoring elasticity of the spring, and the adjustment will be completed with a single touch.

In addition, when the opening/closing hook part is pushed with a finger and moved from the fixed position on the axis against the spring, it will come off the fixed position stopper, and it can be opened and closed in this state, and it can be attached to the lower flange of the steel beam. When closed, the restoring elasticity of the spring pushes it to the fixed position, and the stopper prevents it from opening.

When installed as described above, the net is locked and stretched by the net locking tool.

In Figures 1 to 5, (10) generally indicates the net hanger of the present invention.

The net hanger (10) has a first member (11) and a second member.
The first member (11) has a fixed hook portion (lla) and a net for locking to the negative side edge of the lower flange (2a) of the steel beam (2) made of H-shaped steel. It has a locking tool (13a) at one end.

The second member (12) has at one end an opening/closing hook portion (15) having fixing means (14) for locking to the other end of the flange (2a) and a net locking device (13b).

The other ends of the first member (11) and the second member (12) fit into each other so as to be slidably adjustable in the width direction of the flange (2a), and connect both members (11) and (12) at a predetermined position. It has a connecting means (16) for connecting.

In this embodiment, the first member (11) is formed into a substantially J shape by punching and pressing a sheet metal material of an appropriate thickness, and the fixed hook portion (lla) is attached to the lower flange ( Example 2a) has a surface that comes into contact with the top surface and the side surface, and a separate contact plate (11
b) is combined.

A net locking tool (13a) is attached to one end of the first member (11) via a locking shaft (17). This net fastener (13a) is made by bending a single steel wire into a U-shape at the center.
The bent portion is used as a tongue-like tip, and the entire body is bent rearward into a substantially S-shape, and the rear end is wrapped twice around the locking shaft (17). The reason for this double wrapping is to prevent the net locking device (13a) from coming off the locking shaft (17) even when the net is subjected to the impact force of a falling object. .

A stopper pin (18) for holding the net locking tool (13a) in a normal position is fixedly installed on the first member (11).

A long hole (19) is formed along the sliding direction on the other end side of the first member (11).
), large diameter positioning holes (20
) is formed into an array.

The second member (12) is made by cutting a sheet metal material of an appropriate thickness into a substantially rectangular shape, and then bending it into a bridge shape with a U-shaped cross section using a press. , at one end of which an opening/closing hook part (15) is attached to a pivot (2).
2), and the other end has a connecting means (16).
As an example, the connecting pin (16a) is fixed.

The other end of the first member (11) is slidably fitted into the gutter shape of the second member (12), and the connecting pin (16a)
is for connecting both members (11) and (12) at any position, so that the elongated hole (19) of the first member (11)
It has a small diameter part (16a') corresponding to the positioning hole (16a') and a large diameter part (16a'') that fits into the positioning hole (20).A spring (16b) is mounted on the connecting pin (16a). , this spring (16b) is designed to constantly press the first member (11) against the large diameter portion (16a'') of the connecting pin (16a), thereby maintaining the position after the slide adjustment. In addition, the slide adjustment is performed by moving the first member (11) against the spring (16b) and moving the connecting pin (16a).
) to the small diameter portion (16a'') side.

The opening/closing hook portion (15) is formed into a short shape by punching and pressing a sheet metal material of an appropriate thickness, and has a surface that comes into contact with the upper surface and side surface of the other side of the lower flange (2a) of the steel beam (2). , In order to increase the contact area on the contact surface to the other side upper surface,
A separate contact plate (15a) is connected.

A net locking device (13b) is attached to the opening/closing hook portion (15) via a locking shaft (23). This net locking device (13b) is a net locking device for the first member (11) It is formed with the same configuration as the stopper (13a), and the locking shaft (2
3) in the same manner, and the opening/closing hook part (15
) is held in place by a stopper pin (24) fixed to the base.

The hook portion (15) has its lower end pivotally connected to the end of the second member (12) by a pivot (22) so as to be openable and closable, and the hook portion (15) is pivoted on the pivot (22). It is movable in the axial direction. And the second member (12)
When the hook portion (15) is in the closed state [the state shown in Fig. 1], a stopper (12a) that comes into contact with a part of the hook portion (15) is bent to maintain this state. is forming. This configuration allows the opening/closing hook part (
15) is movable on the pivot (22) between a fixed position by the stopper (12a) and an open/closed position where it does not come into contact with the stopper (12a), and is moved by a spring (14a) mounted on the pivot (22). It is always pressed toward the fixed position.

In this embodiment, a clamp lever (25a) constituting the clamping means (25) is rotatably pivoted on the locking shaft (23) of the opening/closing hook portion (15). is around the pivot point to the locking shaft (23),
The eccentric cam part (25b) has an eccentric cam part (25b).
b) is brought into contact with the side surface of the lower flange (2a) of the steel beam (2) to ensure secure clamping.

The direction of clamp operation of the clamp lever (25a) is as follows:
The opening/closing hook part (15) is aligned with the closing direction, so that the opening/closing operation of the opening/closing hook part (15) can be performed by grasping the clamp lever (25a) as one body, and the opening/closing operation and the clamp release can be performed. The clamp operation can be performed in parallel.

This example consists of the above configuration, and then the steel beam (2)
The procedure for attaching it to the lower flange (2a) will be explained.

At the construction site, the steel beams (2) used at the site
Since the standard dimensions of the H-beam steel are known, I have already adjusted the slide on the ground and brought it up.

This slide adjustment is performed on the small diameter portion (1) of the connecting pin (16a).
Push the first member (11) with your finger against the spring (16b) so that the elongated hole (19) of the first member (11) is aligned with the long hole (19) of the first member (11) and slide it into the predetermined positioning hole (20). ), then release your hand.

The second member (12) has a gutter shape with a U-shaped cross section,
Since the first member (11) is inserted therein, the action of the first member (11) rotating around the connecting bottle (16a) is prevented by the gutter bottom of the second member (12). still,
The connecting bottle (16a) is not limited to a round bar shape, but can be square or hexagonal, and the positioning hole (20) can also have a corresponding shape. According to this, the second member (12) has a gutter shape. Even if not, rotation can be stopped.

In addition, the connecting means (16) is not limited to the method of the above embodiment, and the connecting means (16) is not limited to the method of the above embodiment.
It may be formed so that it can be slid steplessly and fixed with bolts and nuts.

Attach the slide adjustment net hanger (10) to the flange (2).
a), first move the opening/closing hook portion (15) against the spring (14a) to the opening/closing position to open it, and then attach the fixed hook portion (lla) of the first member (11).
is fitted into the - side of the flange (2a) and locked, and in this state, the opening/closing hook part (15) is inserted into the clamp lever (25).
a) and rotate it in the closing direction. As a result, the opening/closing hook portion (15) is locked to the other side of the flange (2a),
Clamping is performed at the same time. Moreover, the opening/closing hook part (
15) is in the closed state, the spring (14a) presses the opening/closing hook part (15) toward the fixed position, and the stopper (12a) is abutted and engaged, so that the opening/closing hook part (15) is in the fixed state. Retained. Note that the fixing means (14) of the opening/closing hook portion (15) is not limited to the above-mentioned embodiment, and may have another configuration, for example, it is automatically locked by the closing operation, and one unclamping operation of the clamp lever (25a) is performed. You may also release the lock with .

As above, attach the net hanger (
10), the net locking tools (13a) (13b
) in the same way as before. Note that the net hanger (10) can be removed by performing the above-mentioned operation in reverse.

In the above embodiment, the clamp lever (25a) clamps the side surface of the flange (2a), but
The upper and lower surfaces of the flange (2a) may be clamped, and the mounting position may be changed to an appropriate position, and the shapes of the first member (11) and the second member (12) may differ from those in the embodiment. It is not limited to this, and various changes are possible.

6 to 9 show other embodiments of the present invention, in which the first member (11) has side abutment plates (26) (26) fixed with bolt nuts or the like, and a net fastener (13a). ), the positioning hole (20) of the elongated hole (19) is a hexagonal hole, the large diameter part (16a'') of the connecting bottle (16a) is a hexagonal shaft, and the clutch has a hexagonal hole. Board (27)
The first aspect is that the position is changed using the
This embodiment is different from the embodiments shown in FIGS. 5 to 5, but the other configurations are the same.

The second member (12) has its bottom surface cut off at both ends,
In a state without a stopper (12a), that is, with both ends having the same shape.

In addition, the hook portion (15) has an insertion hole (
15b) is a hexagonal hole, the net locking device (13b) is installed at a lower position, and the clutch plate (2) has a hexagonal hole.
This embodiment differs from the embodiments shown in FIGS. 1 to 5 above in that the position is changed using 8).

Furthermore, the clamp lever (25a) has a tube (29)
The hook portion (15) is pivotably attached to the hook portion (15), the insertion hole for the pivot shaft (29) is an inclined elongated hole (25c), and side contact plate portions (25d) (25d) are provided on both sides of the lower end. ,
This embodiment differs from the embodiments shown in FIGS. 1 to 5 in that an operating ring (31) is connected to the upper end via a locking pin (30).

In the embodiment shown in FIGS. 6 to 9, the clutch plate (2
7) holds the first member (11) against the spring (16b) and inserts the hexagonal large diameter portion (168”) of the connecting pin (16a).
When moving the first member (168″) from the first member (
11) can be smoothly translated in parallel without collapsing. A clutch plate (28) is also interposed between the hook portion (15) and the second member (12) for the same purpose. In this case, the hook part (15) has
The insertion hole (15b) of the pivot (22) is a hexagonal hole, and
The pivot (22) is provided with a hexagonal shaft-shaped large diameter part (22a) and a round bar-shaped small diameter part (22b), and the hook part (15) is always moved toward the large diameter part (22a) by a spring (14a).
As a result, even if the second member (12) is not provided with a stopper (12a), the hook portion (15) is positioned and held in the closed position by fitting the hexagonal hole and the hexagonal shaft portion. I have to. Then, the net locking tool (13a
) (13b) is installed downward, in this embodiment, when the net flips upward due to reaction during use, the lobes around the net are attached to the net fastening tool (13b).
3a) Make sure that the first member (11) does not come off from (13b).
This is reliably prevented by the hook portion (lla) of and the hook portion (15) on the second member (12) side.

Furthermore, in this embodiment, the clamp lever (25a) is provided with an inclined elongated hole (25c), and the clamp lever (25a)
) is pressed downward in the upright state shown in Fig. 6, the side contact plate (25d) of the clamp lever (25a) moves to the right in Fig. 6 with respect to the pivot (29), and the steel frame Beam (2
) can be clamped on both sides of the operating ring (
31) is the clamp lever (
In order to facilitate the upward pulling operation of 25a) and to prevent the entire net hanger (10) from falling immediately after the clamp is released, a locking hole (31a) through which a finger is pushed is formed.

The inclination angle of the oblique elongated hole (25c) of the clamp lever (25a) is set to an angle of 3° to 4°, which is called the automatic tightening angle.

The other configurations, functions, etc. are the same as those of the embodiment shown in FIGS. 1 to 6, and therefore will be omitted.

Matasato Shika The net hanger of the present invention can be used commonly with H-shaped steel of various sizes, is easy to install, and can improve safety. In addition, each member is made of sheet metal, making it possible to reduce the weight. Furthermore, the clamping means can further improve safety. In addition, slide adjustment operations and locking/unlocking operations of the opening/closing hook portion can be easily performed with a single touch.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a net hanger showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged cross-sectional plan view of the connecting part, and Fig. 4 is an enlarged bottom view of the opening/closing hook part. figure,
5 is an exploded perspective view of the net hanger shown in FIG. 1, FIG. 6 is an overall side view of the net hanger showing another embodiment of the present invention, and FIGS. 7 and 8 are −■ line and ■−
■A cross-sectional view of the line, Fig. 9 is an exploded perspective view of the net hanger shown in Fig. 6, Fig. 10 is a plan view of the conventional net stretched state, Fig. 11 is a plan view of the net, and Fig. 12 is the conventional net hanger. It is a side view of a net tensioned state. (1”) - Steel column, (2) - Steel beam, (2
a) −・−゛Lower flange, (3) −・Net, (4
) - rope, (10) - net hanger, (
11) - First member, (11a) - Fixed hook portion, (12) - Second member, (13a) (13b) - Net locking device, (14) - Fixing means, (15) - Opening/closing hook part, (16)
.--Connecting means, (25) - Clamping means.

Claims (4)

[Claims] (1) A first member having a fixed hook part and a net locking device at one end for locking to one side edge of a lower flange of a steel beam made of H-shaped steel, and a first member for locking to the other side edge of the flange. A second member having an opening/closing hook part with a fixing means and a net fastening device at one end, and the other ends of the first member and the second member are fitted to each other so as to be slidable and adjustable in the width direction of the flange, and the second member is fitted in a predetermined position. A net hanger for a construction site, characterized in that the net hanger is equipped with a connecting means capable of connecting both members. (2) The construction site according to claim 1, wherein one of the first member and the second member is provided with a clamping means for closely clamping the hook portions of both members to the lower flange of the steel beam. net hanger. (3) A long hole along the sliding direction is provided in one of the first member and the second member, a plurality of large diameter positioning holes are arranged on the long hole at appropriate intervals, and the other member is provided with a long hole along the sliding direction. A connecting pin having a large diameter portion that fits into the positioning hole and a small diameter portion that slides the long hole portion is installed, and the former member is constantly pressed onto the connecting pin toward the large diameter portion of the connecting pin. The net hanger for construction sites according to claim 1 or 2, characterized in that a spring is installed therein. (4) The opening/closing hook part is pivotally attached to the end of the second member via a pivot, and is located on the pivot at a position where it can be opened and closed by engaging with and detaching from the end of the lower flange of the steel beam, and in a closed state. A claim characterized in that the second member is movable in the axial direction so as to be able to assume a fixed position in which it abuts a stopper provided at an end of the second member, and is configured to be constantly pressed toward the fixed position by a spring. The net hanger for construction sites according to item 1, 2 or 3.