JP3571331B2 - Hanging equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a hanging tool for lifting various articles such as steel sheet piles using hanging holes.
[0002]
[Prior art]
Conventionally, a pile hanging tool has been used to lift a pile. The present applicant has proposed a stake suspender disclosed in Japanese Patent Application Laid-Open No. H11-36303.
As shown in FIG. 8, the hanging device for a pile includes a hanging pin 3 inserted into a hanging hole 2 a formed in the pile 2 to restrain the pile 2 and a locking member 14 for preventing the hanging pin 3 from moving forward and backward to the main body 4. In addition to being provided as possible, open wires 17 and 23 for retracting the suspending pin 3 and the lock member 14 for opening the suspending pin 3 are provided, and a driving unit 5 for operating the open wires 17 and 23 is provided. are doing.
[0003]
[Problems to be solved by the invention]
In the conventional hanging device for a pile, the main body 4 for holding the pile 2, the driving unit 5 for operating the hanging pin 3 and the lock member 14, and the open wires 17 and 23 are separately formed. There is a problem that it is heavy, has a complicated structure, and is inconvenient to handle.
Usually, in order to move the suspension pin 3 forward and backward, a screw connected to the suspension pin 3 is rotated by a DC motor, and is changed to a linear motion by a nut screwed to the screw. At this time, if the hanging pin 3 does not enter the hanging hole of the pile 2 and sandwiches the pile 2, there is a problem that the nut bites into the screw and the screw does not turn even if the motor is reversed.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the gist of the present invention is to attach an operating section main body to a holder body for lifting an article, arrange a receiver inside the operating section main body, and issue a command of the receiver. A motor that operates with is arranged, a screw is provided in conjunction with this motor, a pin is attached to this screw, and the rotation of the screw advances and retreats the pin,
Rubber cushioning material is provided between the nut and the pin with which the screw is screwed and at the tip of the pin to prevent excessive torque from being applied to the screw when the pin is rapidly stopped. It is characterized.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway front view of a first embodiment of the present invention, FIG. 2 is a sectional plan view showing a main part of FIG. 1, FIG. 3 is an exploded perspective view of a pin mechanism, and FIG. FIG. 5 is an enlarged front view showing the relationship, FIG. 5 is a partially enlarged front view of the pin mechanism, and FIG. 6 and FIG.
In the following embodiments, a hanging tool for a pile will be described, but the present invention is not limited to this, and can be applied to a hanging tool for various articles such as civil engineering equipment.
[0006]
As shown in FIG. 1, a holder main body 50 having a shackle 101 supported by a wire 100 at an upper end is configured. The lower part of the holder main body 50 is formed in a forked shape, and pin engaging portions 51 and 52 are formed, and an insertion space 50a for the pile P is formed therebetween. Further, pin engagement holes 51a and 52a are formed below the engagement portions 51 and 52, respectively.
[0007]
As shown in FIG. 6, the engaging hole 51a formed in the engaging portion 51 on the left side in FIG. 1 has a larger diameter R2 on the outer wall 51e side than a diameter R1 on the inner wall 51d side, as shown in FIG. A recess 51b and a step 51c are formed inside the engagement hole 51a. This is for obtaining a stable engagement state of the pin 75 as described later.
[0008]
Next, the pin mechanism will be described with reference to FIGS.
The pin 75, which is a main part of the pin mechanism 70, includes a cylindrical main body 75b having an annular convex portion 75a formed on the periphery of the distal end, a small diameter portion 75c formed at the other end, and a flange 75d.
A pair of spacers 73 is fitted into the small diameter portion 75c from above and below, and a screw rotation stopper 72 is fitted into the flange portion 75d. After that, the nut 71 is integrally fixed with the screw stopper 72 and the spacer 73 by the bolt 71a and assembled.
Then, a screw 90 is screwed and inserted into a screw hole 71b screwed inside the nut 71. In the figure, reference numeral 75f denotes a screw entry portion formed inside the pin 75.
[0009]
On the other hand, the operating portion main body 60 is fixed to the side surface of the engaging portion 52 on the right side in FIG. The housing 80 is arranged below the inside of the operating section main body 60. This housing 80 is a space for accommodating a part of the pin mechanism 70 and allowing the pin mechanism 70 to move back and forth. When the pile P in FIG. The nut 71 is stored. Further, a rectangular guide hole 82 is formed in the upper part of the housing 80 so that the engagement protrusion 72a of the screw stopper 72 engages and slides.
[0010]
A receiver 69 for receiving a command from a separate radio control transmitter is disposed above the housing 80, and a motor 64 that operates according to the command from the receiver 69 is provided behind the housing 80. One end of a screw 90 is fixed to the motor 64 via a coupling 65.
Reference numeral 67 denotes a battery for driving the motor, and 68 denotes a manual switch that does not depend on the operation of the radio control transmitter.
[0011]
Next, the operation of the present embodiment will be described.
After the upper end of the pile P to be lifted is inserted into the insertion space 50a of the holder main body 50, the pin 75 is advanced, penetrates through the engaging hole 52a and the hanging hole Pa of the pile P, and is inserted into the engaging hole 51a. In this state, the stake P is lifted by raising the holder body 50 with the wire 100.
The operation state will be described in detail. The motor 64 operates according to a command from the radio control receiver 69, and at the same time, the screw 90 rotates. Then, with the rotation of the screw 90, a rotational force is applied to the nut 71 screwed to the screw 90, the flange portion 75d of the pin 75, and the small-diameter portion 75c, and the pin mechanism 70 tries to rotate. However, since the engaging projection 72 a of the screw stopper 72 engages with the guide hole 82 of the housing 80 and is restricted in rotation, the pin mechanism 70 cannot rotate and advances with respect to the screw 90.
That is, the pin mechanism 70 is guided while the engaging projection 72a slides in the guide hole 82 of the housing 80 and retreats into the housing 80, and at the same time, the screw is inserted into the entry portion 75f of the main body 75a. 90, the entire pin mechanism 70 moves in the direction A in FIG. Then, the pin 75 comes off the pile P.
[0012]
On the other hand, when it is desired to advance the pin mechanism 70, the rotation of the motor 64 may be reversed. The power transmission mechanism from the motor 64 to the screw 90 is not limited to a mechanism that directly connects the screw and the motor, and a means such as a timing belt drive or a gear can be selected.
[0013]
On the other hand, the load of the pile P may be applied to the pin 75 while the pile P is lifted, and horizontal or rotational force may be applied. In such a case, since the pin 75 is directly connected to the screw 90, the pin 75 may move in a direction in which the pin 75 comes off (the direction A in FIG. 4). In order to stop the movement of the pin 75, it is usually necessary to use a worm gear or a motor with a brake, but using these means requires a large space.
[0014]
However, in this embodiment, this problem was overcome by providing the annular convex portion 75a at the tip of the pin 75 and providing the concave portion 51b and the step 51c in the engaging hole 51a of the engaging portion 51. That is, when the pin 75 is inserted into the engagement hole 51a, the annular convex portion 75a of the pin 75 is engaged with the step 51c of the engagement hole 51a and the pin 75 is fixed as shown in FIG. Therefore, at this time, even if a horizontal force is applied to the pin 75, the pin 75 does not move in the horizontal direction.
When the load on the pin 75 is removed, the pin 75 is lifted slightly and moves to the center of the engagement hole 51a.
Note that the shape of the annular convex portion 75a is not limited to an annular shape as in the embodiment, and a portion may form a convex portion.
Further, even if a rotational force is applied to the pin 75, the pin 75 rotates between the spacer 73 and the screw stopper 72, and the rotation is not transmitted to the nut 71. Therefore, even if a rotational force is applied to the pin 75, the pin 75 does not move in the horizontal direction.
[0015]
According to this embodiment, since the operation of the motor is directly transmitted by connecting the screw and the pin mechanism, a quick and reliable operation state can be obtained. Further, when the pin 75 is engaged, the annular convex portion 75a is securely engaged with the engaging hole 51a, so that the pin 75 can be prevented from coming off.
[0016]
On the other hand, the control mechanism of the motor 64 for driving the movement of the pin 75 stops driving of the motor 64 when the current value exceeds a certain value so as not to apply an excessive torque. However, when the movement of the pin 75 is suddenly stopped, the change of the current value is too rapid, and the detection of the stop state of the pin 75 may be delayed.
Further, when the inertia of the motor rotating portion or the like is large, an excessive torque is applied, and a biting may occur between the nut 71 and the screw 90 so that the nut 71 cannot be moved by the driving force of the motor 64.
[0017]
The means for preventing the above-mentioned biting will be described with reference to FIGS.
In the example shown in FIGS. 9 and 10, a rubber buffer 92 is interposed between the tip of the nut 71 and the screw pin 75 to prevent the nut 71 and the screw 90 from biting. According to this, for example, when the forward end of the pin 75 stops rapidly without the tip of the pin 75 entering the hole Pa of the pile P, a sudden brake is applied to the rotation of the screw 90. In this case, a change in the current value is detected. Until the drive of the motor 64 stops, the rotation of the screw 90 is allowed by the function of the buffer material 92. This can prevent the nut 71 and the screw 90 from getting caught. In addition, the code | symbol 93 in a figure is the collar of the bolt 71a.
[0018]
In the example shown in FIG. 11, a cushioning material 94 such as rubber is fixed to the tip of the pin 75 to prevent the nut 71 and the screw 90 from biting. According to this, when the pin 75 stops rapidly as described above, the rotation of the screw 90 is allowed by the function of the cushioning material 94. This can prevent the nut 71 and the screw 90 from getting caught.
[0019]
As described above, if a known torque limiter or the like is attached to prevent biting, the size is increased and the cost is increased. However, the above-described cushioning material can achieve the purpose with a simple structure, small size, and low cost. .
[0020]
【The invention's effect】
The present invention is configured as described above, and since the operating part of the pin and the screw is integrally configured, the device is lightweight, simple and compact, and is safe, quick, easy, and prevents biting by remote control. It is possible to carry out the lifting operation of the article by the reliable operation.
[Brief description of the drawings]
1 is a partially cutaway front view of a first embodiment of the present invention; FIG. 2 is a cross-sectional plan view showing a main part of FIG. 1; FIG. 3 is an exploded perspective view of a pin mechanism; FIG. FIG. 5 is a partially enlarged front view of a pin. FIG. 6 is an explanatory view of a pin engaged state. FIG. 7 is an explanatory view of a pin engaged state. FIG. 8 is a front view of a conventional example. FIG. 9 is a schematic view of an anti-jamming means. FIG. 10 is an enlarged cross-sectional plan view showing a main part of FIG. 9. FIG. 11 is a schematic view of an anti-jam means.
50 Holder main body 51, 52 Engagement part 51a, 51b Engagement hole 51b Depression 51c Step 60 Operation part main body 64 Motor 69 Receiver 70 Pin mechanism 71 Nut 72 Screw detent 72a Engagement convex part 73 Spacer 75 Pin 75a Ring convex part 80 housing 82 guide hole 90 screw 92, 94 cushioning material P pile

Claims (1)

Attach the operating part main body to the holder main body for lifting the article, place the receiver inside this operating part main body, arrange the motor that operates according to the command of this receiver, and provide the screw that works with this motor, A pin is attached to this screw, and the pin moves forward and backward by rotating the screw,
A rubber cushioning material is provided between the nut and the pin to which the above screw is screwed and at the tip of the pin to prevent excessive torque from being applied to the screw when the pin is rapidly stopped. Utensils.

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