JPH0215909Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a tool for suspending concrete troughs used for forming drainage ditches, cable channels, etc. More specifically, a pair of friction-retaining members that are brought into contact with the opposing inner surfaces of the concrete trough are individually attached to a pair of arms that are vertically swingably attached to the lower end of the suspension main body, and the friction-retainer The present invention relates to an improvement in the operating means of a hanging tool for a concrete trough, which is provided with an operating means for setting a member in a state where it is pressed against the opposing inner surface.

[Prior art]

Conventionally, as shown in Japanese Unexamined Patent Publication No. 59-12080, an eccentric roller for swinging the arm downward was attached to the suspension main body, and a friction holding member was brought into contact with the opposing inner surface of the concrete trough. When the eccentric roller is rotated by the lever in this state, the friction retaining member is strongly pressed against the concrete trough by the tightening action of the eccentric roller, and is used for friction retention during the initial stage of suspension until it is strongly pressed against the concrete trough due to its gravity. It was designed to prevent parts from slipping.

[Problem that the invention attempts to solve]

However, with the tightening action of eccentric rollers, even a very slight downward swing of the arm makes it impossible to firmly press the friction retaining member against the concrete trough. However, there was a drawback that if the friction retaining member slipped even slightly, the hanging tool would come off the concrete trough.

The purpose of this invention is to make it possible to strongly suspend and hold a concrete trough by its own gravity, while reliably preventing the suspension fittings from coming off due to slipping during the initial stage of suspension. The object of the present invention is to easily and quickly carry out the setting work of pressing a friction retaining member against a concrete trough with appropriate strength and the work of removing a hanging tool from the concrete trough, regardless of changes in the interval between side surfaces.

[Means to solve the problem]

The characteristic structure of the present invention is that a pair of arms are attached to the lower end of the suspension main body so as to be able to swing up and down, and each arm has an operating means for pressing the friction retaining member provided on each arm against the opposing inner surface of the concrete trough. Then, a swinging link is installed across the movable member attached to the suspension main body so as to be slidable up and down and each of the two arms, and maintains the arms in an upward position toward the free end. A spring for biasing the member in a downward direction is provided, a reaction member of the spring is attached to the suspension main body so as to be slidable up and down, and a handle for operating the reaction member is selectively locked. The plurality of locking recesses are vertically distributed in the suspension main body, and the effects thereof are as follows.

[Effect]

In other words, when both friction retaining members are inserted between the opposing inner surfaces of the concrete trough and the reaction member is slid, both arms are swung downward by the action of the swing link, and the friction retaining members are placed between the opposing inner surfaces of the concrete trough. Each is pressed separately to the opposing inner surface. Thereafter, by sliding and fixing the reaction member until the spring is appropriately elastically deformed, the friction retaining member can be strongly pressed against the concrete trough so that it will not come off as it is suspended. When the suspension main body is lifted with a crane or the like, an external force is applied to both arms to cause them to swing downward due to the gravity of the concrete trough, and the friction retaining member is even more strongly pressed against the concrete trough, causing a large Even heavy concrete troughs can be hung securely.

Moreover, the hanging tool can be easily removed from the concrete trough by simply releasing the fixation of the reaction force member while the concrete trough is placed.

In particular, the present invention provides the following remarkable advantages.

(b) Since the action of the spring prevents slippage during the initial stage of suspension, even if the friction retaining member slips a little due to sudden lifting, the biasing action that presses the friction retaining member against the concrete trough will be strong enough. The concrete trough can be reliably lifted without the hanging tools accidentally coming off.

(b) To set the biasing force of the spring, after placing the suspension body inside the concrete trough,
Simply slide the operating handle against the reaction force member of the spring so that the spring is not deformed or slightly deformed to a state where it is moderately deformed, and then lock the operating handle in an appropriate one of the plurality of locking recesses. Therefore, irrespective of the distance between the opposing inner surfaces of the concrete trough, the setting work of pressing the friction holding member against the concrete trough with appropriate strength can be carried out easily and quickly without requiring a large operating force.

In addition, when removing the hanging tool from the concrete trough, after removing the operating handle from the locking recess,
Since the main body for hanging can be taken out from the concrete trough, the work of removing the hanging tool from the concrete trough can be easily and quickly performed without requiring a large operating force.

To explain further, as shown in Japanese Utility Model Publication No. 48-9152, the reaction force member of the spring is fixed to the suspension main body, the operating handle is attached to the movable member, and the operating handle is used to increase the spring. It is conceivable to configure the suspension main body in a deformed state so that it can be inserted into the concrete trough or taken out from the concrete trough, but as the distance between the opposing inner surfaces of the concrete trough becomes smaller, this becomes unnecessary. The setting and removal operations become difficult because a large spring operating force is required and the spring must be kept in a deformed state during the installation and removal operations.

However, according to the present invention, even when operating the reaction force member, a necessary and sufficient almost constant operating force is applied regardless of the distance between the opposing inner surfaces of the concrete trough.
Since it is sufficient to apply the suspension at different timings to the setting and removal of the hanging main body, the setting and removal operations can be easily and quickly performed.

[Effect of idea]

As a result, the concrete trough can be strongly suspended and held by gravity, and furthermore, it is possible to reliably prevent accidental dislodgement caused by slippage during the initial stage of suspension, and it is also possible to perform setting and removal operations easily and quickly. We are now able to provide a concrete trough suspension with even higher performance.

〔Example〕

Next, examples will be shown.

As shown in FIG. 1, a connecting device 2 for hanging ropes, etc. is attached to the upper end of the hanging main body 1, and a pair of left and right arms 3a, 3b that can freely swing up and down are attached to the lower end. Friction retaining members 4a and 4b, which are brought into contact with the opposing inner surfaces of the trough, are bolted to the tips of the arms 3a and 3b, respectively, so that they can be adjusted in and out, and are rotatably attached around the support shaft 5. .

A movable member 6 is slidably attached to the suspension main body 1, and a swing link 7a maintains the arms 3a, 3b in an upward position toward the free end, spanning the arms 3a, 3b and the movable member 6, respectively. 7b, a spring 8 for biasing the movable member 6 in the downward direction is installed inside the suspension main body 1, and a reaction force member 9 against the spring 8 is installed inside the suspension main body 1 so as to be freely slidable up and down. , a handle 10 attached to the reaction force member 9 is made to protrude from an elongated hole 12 with a locking recess 11 of the suspension main body 1, and by operating the handle 10, both arms 3a, 3b are
The handle 10 is configured to be able to swing up and down integrally, and the reaction member 9 can be fixed against the spring 8 by locking the handle 10 in the recess 11.

That is, as shown in FIG. 2, while the friction holding members 4a and 4b are pressed against the opposing inner surfaces 13a and 13b of the concrete trough 13, and
With the spring 8 being appropriately elastically deformed, the reaction member 9 is fixed to the suspension main body 1, and the concrete trough 13 is suspended using the rigging 14 attached to the connector 2 and the crane 15, etc. Further, the hanging tool is configured so as not to protrude laterally outwardly of the concrete trough 13.

[Another example]

Next, another embodiment will be described.

Friction retaining members 4a, 4b, structure for attaching them to arms 3a, 3b, arms 3a, 3
b, and a structure for attaching it to the hanging main body 1;
The movable member 6 and the reaction force member 9, a structure for attaching them to the hanging main body 1, swing links 7a, 7b,
The structure connecting it to the movable member 6 and the arms 3a, 3b, and the structure of the hanging main body 1 can be changed as appropriate, and the operating configuration and fixing configuration of the reaction force member 9 can also be changed as appropriate. be.

A large number of friction retaining members 4a, 4b may be provided so as to contact each of the opposing inner surfaces 13a, 13b of the concrete trough 13 at multiple points in the width direction, or may be formed to be long in the width direction of the opposing inner surfaces 13a, 13b. Alternatively, the suspension main body 1 may be formed to be suspended at two locations so that the concrete trough 13 can be suspended stably.

The shape, purpose, and other aspects of the target concrete trough 13 do not matter.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention,
FIG. 1 is a partially cutaway front view, and FIG. 2 is a conceptual diagram of the device in use. FIGS. 3A and 3B are explanatory diagrams of different conventional examples. 1...Main body for hanging, 3a, 3b...Arm, 4
a, 4b...Friction holding member, 6...Movable member,
7a, 7b... Swing link, 8... Spring,
9... Reaction member, 13... Concrete trough,
13a, 13b...Opposing inner surfaces.

Claims (1)

[Scope of utility model registration request] Opposing inner surface 13a of concrete trough 13,
A pair of friction holding members 4a, 4b which are brought into contact with the friction holding members 13b are respectively attached to a pair of arms 3a, 3b which are attached to the lower end side of the suspension main body 1 so as to be able to swing up and down. .
A movable member 6 attached to the suspension main body 1 so as to be slidable up and down, and a swing link 7a that extends over the arms 3a and 3b and maintains the arms 3a and 3b in an upward position toward the free end. , 7b, and a spring 8 for biasing the movable member 6 in the downward direction is provided, and the reaction member 9 of the spring 8 is attached to the suspension main body 1 so as to be able to slide vertically. A hanging tool for a concrete trough, in which a plurality of locking recesses 11 for selectively locking an operating handle 10 of a force member 9 are arranged vertically distributed in the hanging main body 1.