JPH0623793Y2 - Tension detection load clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a tension detection load clamp, and in particular, when there is no device for detecting the tension of a specific rope, the initial tension of the rope is grasped, The present invention relates to a tension detection load clamp suitable for proper lashing.

[Prior Art] Conventionally used load clamps and load lock mechanisms, for example, lever blocks (trademark registration 4051 of KITO CORPORATION).
80) is used for lashing the transported items, but the present condition is that the transported items are fastened by the operator's intuition. Therefore, the product may be damaged due to over-tightening, the rope, the hook, the load clamp, etc. may be damaged, and an accident such as a fall or fall of a transported item due to insufficient tightening may occur.

Therefore, there has been a demand for the development of a load clamp that has a tension detection function that enables the operator to grasp the tension of the rope and perform proper load fastening.

Conventionally, there is a lever block with an overload prevention device, which has been equipped with some kind of detection means in a load clamp, a lever block, etc., for the purpose of detecting overtorque and protecting the load clamp mechanism. It was installed as, and there was nothing that could detect the tension of the rope.

Here, the rope functions as a rope for securing the load fastening member and includes a load chain.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, no consideration is given to detecting the initial tension of the rope during load tightening, and there is a problem in terms of product protection and prevention of collapse of the load. .

The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is possible to easily grasp the tension of the rope, and by optimally tightening the rope, for example, lashing transportation goods and securing maintenance work products. It is an object of the present invention to provide a tension detection load clamp that can securely bind and achieve safety.

[Means for Solving the Problems] In order to achieve the above object, the structure of the tension detecting load fastening machine according to the present invention is one in which a torque wrench is attached to the arm portion of the load fastening mechanism. A torque wrench having a display section in which a torque display is converted into a tension display while a socket having a head mounting hole is fixed in either the case or the case of the arm section cut to a predetermined length. The head part is detachably fitted into the head mounting hole of the socket.

[Operation] A part of the arm portion of the load-tightening mechanism, for example, the lever block is cut, and a socket to which a torque wrench can be attached is attached to the remaining arm portion, so that the torque wrench can be attached and detached, and the attached torque wrench. Is the arm part of the lever block (load clamp).

Further, if the torque wrench and the socket are fixed, the torque wrench cannot be removed.

The torque display of the torque wrench is displayed in tension converted into tension, and by operating the torque wrench that has become the arm of the lever block (load clamp) as described above, the rope (chain) that is the load clamp member. Is displayed on the display.

By using the torque wrench of the initial setting type, the rope initial tension set in advance can be set with the torque wrench to obtain the rope initial tension.

Since the torque display is converted into the tension display, there is no erroneous display of rope tension in the torque wrench display.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is a configuration diagram of a tension detecting load clamp according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view showing a socket of an arm portion in the load clamp of FIG. 1, and FIG. 2 is a plan view as seen from the direction of arrow A in FIG. 2, FIG. 4 shows the head portion of the torque wrench in the load clamp of FIG. 1, (a) is a front view, and (b) is
[Fig. 6] is a view on arrow B of (a).

The tension detection load clamp shown in FIG. 1 uses a lever block that is commercially available as a load fastening mechanism, and attaches a commercially available torque wrench to the arm portion of the lever block that relates to the grip portion of the load fastening mechanism. The torque display of the rope (chain) is converted into a tension display so that the tension can be understood by the arm portion of the load clamp machine, that is, the trich wrench.

In FIG. 1, 1 is a lever block main body, 2 is an arm unit connected to the lever block main body 1, 3 is a lever for switching an idle mechanism (not shown) of the lever block main body 1, 4, 5 Is a hook for lashing transport goods (products), 6
Is a chain that functions as a lashing rope related to the load-tightening member. In the description of the tension of the chain 6, it will be referred to as rope tension hereinafter.

Reference numeral 7 is a torque wrench, 8 is a display unit on the main body of the wrench wrench, and this display unit 8 is a display unit in which torque display is converted into tension display. Reference numeral 9 denotes an adjusting unit at the end of the torque wrench 7, which adjusts the scale of the display unit using, for example, a hexagonal wrench. Reference numeral 10 denotes a coupling portion for mounting a torque wrench on the arm portion 2 of the lever block.

Details of the coupling portion 10 will be described with reference to FIGS. 2 to 4. In the figure, the same reference numerals as those in FIG. 1 denote the same parts.

In the arm section 2 shown in FIGS. 2 and 3, 2a is a case that constitutes an arm, and the case 2a of the arm section 2 is
The arm of a commercially available lever block is cut at a predetermined length.

11 is a socket, 12 is a head mounting hole drilled in the socket 11, 12a is a stepped portion, 13 is a drill hole drilled in a direction orthogonal to the axial direction of the head mounting hole 12, 14
Indicates a screw hole provided on an extension of the drill hole 13, and 15 indicates a weld bead for fixing the socket 11 in the case 2a.

In the front part of the torque wrench shown in FIG. 4, 20 is a torque wrench body, 21 is a head having the same shaft center as the shaft center of the torque wrench, 22 is a drill hole drilled in a direction orthogonal to the head shaft center, and 23. Is a stepped portion of the head, and 24 is a ball of the head portion.

Further, the grip portion of the torque wrench 7 serving as the arm portion of the tension detecting load clamp of the present embodiment has a structure in which a rubber cover 7b is provided on the outer periphery of the torque wrench main body 20 and is covered with a metal cover 7a.

The head 21 of the torque wrench 7 shown in FIG. 4 is fitted into the head mounting hole 12 of the socket 11 shown in FIG. 2, and the stepped portion 23 of the head is fitted into the stepped portion 12 a of the head mounting hole 12.

Although it can be used in this state (that is, the detachable fitting state), in order to fix the head 21 to the socket 11,
Use a bolt or headless screw to cut through the socket 11 1
3, through the drill hole 22 of the head 21 and fasten to the screw hole 14 of the socket 11.

This constitutes a tension detection load clamp.

For example, in the case of operations such as lashing of transported goods and tightening and fixing of products in the maintenance work of products, the hooks 4 and 5 of the lever block body 1 and the chain 6 are used to lash the products. Since the torque wrench 7 that hits the arm portion of the fastener has the display portion 8 in which the torque display is converted into the tension display, it is possible to perform safe load tightening while detecting the tension at the time of tightening.

According to the tension detecting load clamp of the present embodiment, the commercially available torque wrench is attached by cutting the arm portion of the commercially available lever block, so that the torque wrench 7 is used as the main load clamp as shown in FIG. It will be the grip of.

Therefore, the torque wrench 7 may be configured to be attachable / detachable to / from the load clamp body (lever block main body 1, arm portion 2), whereby the load clamp machine can be operated without the torque wrench 7 (grip portion). There is no need to worry that anyone other than the worker is touching it. Also, it is not always necessary to attach a torque wrench to each load clamp,
It is economical because one torque wrench can be used in a rotating manner for a plurality of load clamps (a plurality of load clamp locations).

In general, commercially available torque wrenches include a meter type and an initial value setting type.

If a meter-type torque wrench is applied, the tension can be read while tightening the rope with the load clamp (lever block). More specifically, it can be read how the initial tension of the load clamping changes after a lapse of time.

Also, if you use the torque wrench of the initial value setting type, you can set the required initial tension on the scale of the torque wrench in advance and tighten it until you hear a click without worrying about the meter reading. The initial tension of the rope can be obtained.

In both the meter type and the initial value setting type, the gauge scale on the display shows the torque display (kgcm) converted to the tension display (kg).

In the above embodiment, the example in which the arm portion is cut to a predetermined length has been described, but the present invention is not limited to this, and although not shown, the arm portion is not cut and the inside of the case of the arm portion is not cut. An example in which a socket of a torque wrench is attached to the above can also be implemented.

[Effects of the Invention] As described in detail above, according to the present invention, by attaching a torque wrench having a display section for converting the torque display into a tension display to the arm portion of the load fastening mechanism, To provide a tension detection load clamp that can easily grasp the tension and, by optimally tightening the rope, securely lock, for example, transportation products and maintenance work products, and achieve safety. You can

[Brief description of drawings]

FIG. 1 is a configuration diagram of a tension detecting load clamp according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view showing a socket of an arm portion in the load clamp of FIG. 1, and FIG. 2 is a plan view as seen from the direction of arrow A in FIG. 2, FIG. 4 shows the head portion of the torque wrench in the load clamp of FIG. 1, (a) is a front view, and (b) is
[Fig. 6] is a view on arrow B of (a). 1 ... Lever block body, 2 ... Arm part, 2a ...
Case, 7 ... Torque wrench, 8 ... Display, 11 ...
Socket, 12 ... Head mounting hole, 13 ... Drill hole, 1
4 ... Screw hole, 21 ... Head, 22 ... Drill hole.

Claims (4)

[Scope of utility model registration request] 1. A torque wrench is attached to an arm portion of a load tightening mechanism, and a head is attached to either the case of the arm portion or the case of the arm portion cut into a predetermined length. A tension detection load characterized in that a socket having a hole is fixed, and a head portion of a torque wrench having a display section for converting a torque display into a tension display is detachably fitted into a head mounting hole of the socket. Clamp. 2. The tension detecting load fastening machine according to claim 1, wherein a mounting hole for a member for fixing the head portion of the torque wrench is provided in a direction orthogonal to the axial direction of the head mounting hole of the socket. . 3. The tension detecting load fastening machine according to claim 1, wherein the display portion of the torque wrench is a meter display capable of reading how the initial tension of the load fastening member changes after a lapse of time. 4. The tension detection load clamper according to claim 1, wherein the display portion of the torque wrench is an initial setting type that can be clamped once set up without worrying about the meter up to the set value. .