JPS6343314B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a horizontal suspension clamp suitable for remote control, and more particularly to a horizontal suspension clamp for remote control having a push-out member.

PRIOR TECHNOLOGY Modern large buildings, including high-rise buildings, are constructed mostly of steel frames, mainly shaped steel.The frames are hoisted up and temporarily installed at the desired location, and then the frames are hoisted up. It is necessary to remove the used clamp from the steel frame. Conventionally, this removal work has been performed manually, but in this case, the worker must move to the clamp attachment position and perform the work. Generally, the working environment is high and the footing is poor. Therefore, there was a risk of accidents such as workers falling.

For this reason, it is known to incorporate a drive source and a control device into the clamp itself, and remotely control this using a wireless oscillator or the like.

Also, a clamp is known in which the release operation of the clamp is performed using a drawstring or the like.

Furthermore, when remotely controlling a horizontal hanging clamp to perform a release operation, in order to release the clamp from the temporarily attached steel frame, pull the clamp laterally and remove the horizontal slot from the steel frame. is necessary. Furthermore, even if the clamp is once removed from the steel frame, there is a possibility that the slot may engage with the steel frame again. For this reason, some clamps are known that are provided with means for closing the opening of the slot after the release operation is performed.

Problems to be Solved by the Invention However, a clamp having a drive source and a control device has the drawbacks that the clamp is large and has a complicated structure, which also increases the unit price of the clamp and increases the weight of the clamp. Therefore, there is a drawback that either the maximum lifting load is reduced or the strength of the lifting sling is increased, and as a result, the energy required for lifting is also increased. Furthermore, a more complex structure inevitably tends to increase the frequency of failures. Clamps in particular were susceptible to shock, which could damage or cause failure of expensive control and drive equipment. If you use a faulty or damaged clamp without knowing it,
After hoisting and lowering the steel frame, the clamp must be repaired and the hoisting work must be repeated, which not only reduces the efficiency of the work, but also
It can also cause serious accidents.

Clamps that operate using a drawstring also require a length approximately twice the maximum lifting distance if the drawstring is operated on the ground, and the drawstring may be moved from the work site during operation. There is a risk of it becoming entangled with other objects. If the pull cord is used to release the clamp, there is a possibility that the steel frame may be accidentally released from a high place, which is extremely dangerous.

The drawstring of the clamp, which is operated using a drawstring,
The problem of the length of the pull string can be solved by operating the clamp by a drive source installed on a scale or other means for suspending the clamp, and by remotely controlling the drive source. , there is still a possibility that the release action will be performed erroneously.

Furthermore, with conventional clamps that have a means for closing the slot, a means or operation is required to separate the clamp from the temporarily attached steel frame. This has generally been done by moving the suspension point of the clamp away from the pre-installed steel frame; The greater the length, the more the clamp will swing when it separates from the steel frame, which increases the possibility of the clamp colliding with surrounding objects and causing damage to the clamp or surrounding objects. Increase your chances of giving.

Means for Solving the Problems In the present invention, one end is closed by a pair of horizontally elongated legs that are vertically spaced apart and opposed to each other, and a base that connects the corresponding ends of the legs. a generally C-shaped clamp body defining a laterally extending slot open at the other end and pivotally mounted proximate the free end of the upper leg and extending from said slot; a cam that is rotatable between a retracted release position and a grasping position protruding into the slot; and a cam that is pivotally connected to the cam so that when a lifting force is applied, the cam is moved to the closed end of the slot. (a) a hanging ring connected to the side so that the cam surface protrudes from the side toward the open end and toward the opposing leg; (b) a pusher member rotatable between an inoperative position in which the pusher member is retracted to the side to receive the article into the slot and an operative position in which the pusher member is pivoted toward the open end of the slot to push the article out of the slot; a bell crank pivotally attached to the clamp body; (c) a first connecting means for connecting the bell crank and the cam; and (d) a second connecting means for connecting the bell crank and the pushing member. (e) operating means for rotating the bell crank at least in the positive direction; (f) the first connecting means for controlling the rotation of the bell crank in the positive direction when the cam is in the gripping position; (g) means for restricting relative movement between said bellcrank and said cam so as to inhibit and permit forward rotation of said bellcrank when said cam is in a released position; (h) the connecting means connects the bell crank and the pushing means so as to drive the pushing member to the operating position when the operating means rotates the bell crank in one direction; The operating means is adapted to at least rotate the bell crank in the forward direction.

This allows the pushing means to disengage the clamp from the steel frame only when the clamp is in the released state, and the slot does not engage with the steel frame as long as the pushing member remains in the pushed position.

In a preferred embodiment of the present invention, the second
The connecting means is a rod having one end pivotally connected to the bell crank, and the other end of the rod extends through an insertion opening provided in the extrusion member, and has a stopper for preventing slippage, and the rod is connected to the rod. A compression coil spring is disposed around the rod between the pivot point with the bell crank and the insertion opening.

As a result, prior to the clamp release operation,
An elastic force of a compression coil spring is applied to the pushing member, and the pushing means operates instantaneously when the clamp is released.

In a further preferred embodiment of the present invention, the operating means is a push-pull wire, and is adapted to rotate the bell crank in two directions: forward and reverse.

Thereby, the releasing operation and grasping operation of the clamp, and the pushing-out operation and retreating operation of the pushing-out means can be operated by a single operating means.

Embodiment FIG. 1 is a front view of a horizontal hanging clamp according to an embodiment of the present invention, FIG. 2 is a left side view of the clamp shown in FIG. 1, and FIG. 3 is a right side view of the clamp shown in FIG. 1. It is. In addition, in FIG. 1, the front side plate is removed to make the internal structure clear.

The clamp body 7 consists of two side plates 7', 7'' (the front side plate 7' has been removed in Figure 1) and has a slot 8 for receiving a part of the shaped steel. For example, the clamp body 7 is closed at one end and closed at the other end by a pair of horizontally elongated legs that are vertically spaced apart and opposed to each other and a base that connects the corresponding ends of the legs. It has a pair of generally C-shaped side plates defining laterally extending slots into which the sides are open.

A cam 10 as a locking member is rotatably attached between the side plates 7' and 7'' by a cam pin 9. A hanging ring 11 is pivotally attached to one end of the cam 10, and a hanging ring is attached to the other end. When the cam 1 moves upward, it locks the rotating projecting steel in the slot 8.
0 is pivotally mounted proximate the free end of the upper leg and has a release position retracted from said slot;
It can be rotated between a gripping position protruding into the slot. The suspension ring 11 is pivotally connected to the cam, and when a lifting force is applied, the cam is moved from the closed end side of the slot to the open end side and toward the opposing leg so that the cam surface is pushed out. connected. The cam 10 can be always biased by a cam spring 12 connected thereto in a direction in which the cam surface protrudes into the slot (closing direction). This prevents the shaped steel once locked by the cam from coming off the clamp before the hanging ring is pulled upward by the sling. The above-described structure of the clamp is known and the present invention presupposes such a clamp structure.

In the present invention, a push-out member 13 is provided. The pushing member 13 pushes out the mold steel from the clamp when the temporary attachment work of the mold steel is finished and the locking force of the cam is weakened, so that the mold steel is separated from the clamp.
It also prevents the shaped steel from entering the slot again. As is clear from FIGS. 1 to 3, the pushing member 13 is provided outside the clamp body, and a portion 13' of the pushing member is provided between the side plates. 13 and 13' are fixed coaxially and rotate together. Specifically, the pushing member 13 is pivotally connected to the clamp body 7, and can be moved between an inoperative position in which it is retracted toward the closed end of the slot to receive an article into the slot, and a pivoted position toward the open end of the slot. and an operating position in which the article is pushed out of the slot. The entire extrusion member may be provided between the side plates.

Reference numeral 14 denotes a drive link member or bell crank, which is pivotally supported between the side plates of the clamp body and has three ends.

The upper end of the bell crank 14 is connected to a cam via a first connecting means 15. In the illustrated embodiment, the first connecting means 15 is shown as a pair of connecting arms sandwiching the cam.
It is possible to use two cams and one connecting arm.

The lower end of the bell crank is connected to the second connecting means 16
via which it is connected to part 13' of the pusher member. In the illustrated embodiment, the second coupling means 16 comprises:
It consists of a rod 17 and a spring 18 surrounding it, and the rod 17 passes through the connecting part with the extrusion member and has a stopper 19 at its end to prevent it from slipping.

A wire 20' of the operating means 20 is connected to the middle end of the bell crank 14. In the illustrated embodiment, the operating means 20 is shown as a push-pull wire consisting of a wire protected by a sheath or outer tube. The other end of the operating means 20 is connected to a drive source and a control means. These driving sources and control means are provided on means such as a balance, for example.

When the wire 20' is actuated in the pushing direction (downward in FIG. 1), the bell crank 14 rotates clockwise, and as a result the cam 10 is rotated in the closing direction by the cam spring 12, and the pushing member 13 rotates counterclockwise. The mold steel is locked in this state. First, the hanging ring 11 is operated in the direction of pushing it open (opening direction) against the cam spring 12. Since the first connecting means 15 is provided with the slit 21, even if the upper end of the bell crank 14 is rotated to the right from the illustrated position (the position where the pushing member 13 is moved to the retracted position), The cam 10 can be rotated in the opening direction. In this way, after pushing the shaped steel into the slot, when the hanging ring 11 is released,
The shaped steel is locked by the cam spring 12. Thereafter, when the hanging ring 11 is lifted up by the hanging sling, the cam 10 firmly locks the shaped steel. In the lifted state, when the wire 20' of the operating means 20 is pulled, the bell crank 14 rotates until the connecting pin of the bell crank 14 is locked by the right end of the slit 21 of the first connecting means 15. However, since the spring 18 is not strong enough to force the suspended article out of the slot, the slot will be compressed and the rod 17 will simply protrude from its connection with the pusher member, leaving the pusher member in the inoperative position. Stop. Also cam 10
is in the release position, allowing the bell crank 14 to rotate clockwise.

After transporting the shaped steel to the desired location and temporarily installing it, when opening the shaped steel, loosen the hanging sling,
Pull the wire 20'. This causes the bell crank 14 to rotate counterclockwise. At this initial stage of rotation, the slit 21 prevents the cam 10 from rotating. The profile remains locked in the slot by the cam spring 12. On the other hand, due to the counterclockwise rotation of the bell crank 14, the second connecting means 16 is pushed to the right in FIG. However, since the profile is locked in the slot, the pushing means 13 cannot be rotated clockwise, the rod 17 projects to the right from its connection with the pushing member part 13', and the spring 18 is compressed. be done. When the wire 20' is pulled further, a pin fixed to the upper end of the bell crank engages the left end of the slit in the first connecting means 15, causing the cam 10 to rotate clockwise and releasing the shaped steel. As a result, the clamp is instantly detached from the mold steel by the elastic force of the compression spring 18. The wire 20' is
As long as the bellcrank 14 and the pushing means 13 remain in the position shown in FIG. 1, the shaped steel will not re-enter the slot of the clamp.

It will be understood that when the operating means 20 is a push-pull wire, all of the releasing operation and grasping operation, and the pushing-out operation and retreating operation of the pushing-out means can be operated.

[Brief explanation of the drawing]

FIG. 1 is a front view of a horizontal hanging clamp according to an embodiment of the present invention, FIG. 2 is a left side view of the clamp shown in FIG. 1, and FIG. 3 is a right side view of the clamp shown in FIG. 1. . Explanation of symbols, 7: Clamp body, 7', 7'': Side plate, 8: Slot, 9: Cam pin, 10: Cam,
11: Hanging ring, 12: Cam spring, 13: Extrusion member, 13': Part of extrusion member, 1
4: Bell crank, 15: First connecting means, 16:
Second connection means, 17: rod, 18: spring, 19: stopper, 20: operating means, 20':
Wire, 21: Slit.

Claims (1)

[Scope of Claims] 1. One end is closed and the other end is closed by a pair of horizontally elongated legs that are vertically spaced apart and opposed to each other and a base that connects the corresponding ends of the legs. a generally C-shaped clamp body defining an open laterally extending slot;
A cam that can be rotated between a release position that is retracted from the slot and a gripping position that protrudes into the slot, and a cam that is pivotally connected to the cam so that when a lifting force is applied, the cam is moved to the slot. (a) a hanging ring connected to a cam surface extending from the closed end side to the open end side and toward the opposing leg; and is rotatable between an inoperative position in which it retreats toward the closed end of the slot to receive the article into the slot, and an activated position in which it rotates toward the open end of the slot to push the article out of the slot. (b) a bell crank pivotally connected to the clamp body; (c) first connecting means for connecting the bell crank and the cam; (d) the bell crank and the extruding member; (e) operating means for rotating the bell crank at least in the positive direction; (f) the first connecting means has one end pivotally connected to the cam; (g) a link arm having an elongated hole at the other end, and the cam and the bell crank are connected by slidably supporting a connecting pin provided in the bell crank in the elongated hole; The two connecting means is a rod having one end pivotally connected to the bell crank, the other end of the rod extending through an insertion opening provided in the extrusion member, and having a stopper for preventing slippage; A horizontal suspension clamp suitable for remote control, characterized in that a compression coil spring is arranged around the rod between the pivot point of the rod and the bell crank and the insertion opening. 2. The clamp according to claim 1, wherein the operating means is a push-pull wire,
A horizontal hanging clamp suitable for remote control, characterized in that the bell crank described above can be rotated in two directions, forward and reverse.