JPH0733567U - Counter force canceling device for screw tightening rotary tools - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure that the reaction force generated on the screw tightening rotary tool at the completion of screw tightening can be canceled without the need for finding the fulcrum of the reaction force receiving object or other structure And improve the efficiency of screw tightening work. [Structure] A screw tightening rotary tool is connected and connected to a tip end of an article holding balancer mounted on a moving carriage or installed on a floor or the like through a reaction force canceling bar. .

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention is capable of efficiently canceling a reaction force generated on a screw tightening rotary tool at the completion of screw tightening work using the screw tightening rotary tool. The present invention relates to a reaction force canceling device for a screw tightening rotary tool that can improve efficiency.

[0002]

2. Description of the Related Art At the completion of screw tightening work using a screw tightening rotary tool that fastens screws such as bolts and nuts using the rotation of a motor, a tightening torque is applied to the screw tightening rotary tool. Equivalent reaction force is generated. Conventionally, in order to absorb and cancel such a reaction force, it is necessary to appropriately mount a body to be tightened such as an automobile body or an engine that bolts the other end of a reaction force cancellation bar having one end attached to a screw tightening rotary tool. It was carried out by abutting on an appropriate place of a suitable structure such as a leg portion of a belt conveyer that conveys these parts or an appropriate place of the structure and fixing the screw tightening rotary tool.

[0003]

[Problems to be Solved by the Invention] However, when the fulcrum of the reaction force reception is to be obtained at an appropriate place of the object to be fastened or other structure, there are the following difficulties and it is not appropriate. It was That is, the shape, type, size, etc. of tightened objects such as automobile engines, bodies, chassis, etc. are various, so it is easy to find the appropriate position of the fulcrum of reaction force according to these differences. It is difficult and difficult to ask for. And there is also a risk that the engine or the like will be damaged. Also, when the fulcrum for receiving the reaction force is required at an appropriate place such as the leg of the belt conveyor, it is difficult to ensure the accuracy of absorption and cancellation of the reaction force because the object to be tightened such as the engine is transported. There is a drawback. The present invention solves the drawbacks of the prior art, that is, it is not necessary to find a fulcrum for reaction force reception on the object to be tightened or other structures, and the shape, type, size, etc. of the object to be tightened for screwing. Irrespective of the difference of the above, and regardless of whether the position of the object to be tightened is stationary or moving, it is possible to always easily and reliably absorb and cancel the reaction force, and further improve the screw tightening work efficiency. With the goal.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a counteracting force canceling at the front end of an article holding balancer mounted on a moving carriage or installed on a floor or the like. It is characterized in that a rotary tool for tightening a screw is connected and connected through a bar. The article-holding balancer includes a column fixed to the floor, a single-joint or multi-joint arm whose one end is pivotally attached to the column, and a column interposed between the column and the arm. A cylinder for vertically rotating the arm is used, and the tip of the single-joint or multi-joint arm is used as the connecting and connecting structure of the screw tightening rotary tool to the article-holding balancer. In some cases, a rotating tool with a screw tightening connected to the other end of a reaction force canceling bar with one end attached to it via a jig. Further, as the article-holding balancer, one comprising a cylinder vertically arranged so as to be pivotable on a moving carriage is used, and as a connecting and connecting structure of a screw tightening rotary tool to the balancer, a rod tip portion of the cylinder is used. In some cases, a rotary tool with one end attached to a rotary tool with a reaction force canceling bar attached to the other end via a jig is used.

[0005]

[Operation] A screw tightening rotary tool is bolted to an automobile engine, body, chassis, etc. via an article holding balancer that can be easily moved up and down, left and right, and front and rear by rotating and expanding and contracting. Set the screw at the specified position for equal tightening and rotate the rotating tool to tighten the screw. Then, when the tightening work is completed, a reaction force equivalent to the tightening torque is generated on the screw tightening rotary tool, but this reaction force is the same as the reaction force canceling bar installed at one end of the screw tightening rotary tool. Since the end is connected and connected to the tip of the balancer for holding the article, the connecting connection serves as a fulcrum for receiving the reaction force, which is absorbed and canceled by the reaction force canceling bar and impacts the worker. Is not transmitted.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, A is an article-holding balancer composed of columns, arms, cylinders, etc., and an air- or electric screw tightening rotary tool 1 has an L-shaped reaction force canceling bar-2 at its tip. Are connected and connected via. The column 3 of the article-holding balancer A is installed and fixed on the floor, and one end of the first arm 4a is pivotally attached to the upper side of the column 3 so as to be vertically rotatable. Has been installed. The rod arm of an air cylinder 5 pivotally mounted on the support column is pivotally mounted on the middle portion of the first arm 4a, and the first arm 4a is connected via this cylinder-5. Rotate up and down. A second arm 4b is horizontally rotatably connected to the other end of the first arm 4a through a connecting jig 6, and the other end of the second arm 4b is further rotatably connected. Similarly, a third arm 4c is horizontally rotatably connected to the portion via a connecting jig 6. One end of the reaction force canceling bar-2 is rotatably connected to the tip of the third arm 4c through a jig 7 so that the setting position can be finely adjusted as shown in FIG. The tightening nuts or bolts 8 prevent the rotation and are fixed. The other end of the reaction force canceling bar-2 is fitted and mounted on the outer surface of the tip end cylinder of the screw tightening rotary tool 1, and the screw tightening rotary tool 1 is also 360 ° with respect to this reaction force canceling bar-2. It is rotatable, and its rotation is blocked and fixed by a tightening nut after fine adjustment of the set position. Then, the worker operates the cylinder 5 of the article-holding balancer A and the arms 4a to 4c as appropriate to quickly move the screw tightening rotary tool 1 to a predetermined position for screw tightening with respect to an automobile engine or the like. Set to and operate the rotating tool to tighten the screw. The reaction force generated when the tightening work is completed is absorbed by the reaction force canceling bar-2 and is canceled by using the connection connecting part between the one end of the reaction force canceling bar-2 and the tip of the article holding balancer A as a fulcrum. Therefore, the impact force is not transmitted to the worker.

FIG. 3 shows another embodiment. In this case, the article holding balancer B is mounted on the movable carriage 10. The article-holding balancer B is composed of a cylinder 11, and the cylinder 11 is arranged upright on the moving carriage 10 via a swivel so as to be rotatable 360 degrees in the horizontal direction. Reference numeral 12 is a pressure regulator. One end of a reaction force canceling bar 14 mounted on the screw tightening rotary tool 1 is connected to the tip end of the rod of the cylinder 11 via an angle adjusting fitting 13 so as to be rotatable in the arrow direction. In this case, the reaction force generated when the screw tightening work is completed is absorbed by the reaction force canceling bar 14 with the pivotal connection between the reaction force canceling bar 14 and the rod tip of the cylinder 11 serving as a fulcrum. Therefore, the impact force is not transmitted to the worker as described above.

[0008]

Since the present invention has the above-mentioned structure, it solves the above-mentioned problems of the prior art and has the following effects. a. One end of the reaction force canceling bar is connected and connected to the tip end of the article-holding balancer. Therefore, the fulcrum of the reaction force reception is, as in the conventional case, the object to be fastened such as an automobile engine or body, or a belt conveyor. Since it is not necessary to obtain it at an appropriate portion of an appropriate structure such as a leg portion of −, it does not take time and difficulty to set an appropriate fulcrum of reaction force reception as in the conventional case. b. Since it is not necessary to bring one end of the reaction force canceling bar into contact with the object to be fastened such as the engine and body of the automobile or other structures, the object to be fastened is not damaged as in the conventional case. c. The fulcrum of reaction force reception can be set easily without the need to find the object to be tightened or other structures, and the rotary tool for screw tightening can be quickly and quickly set to the specified tightening point via the article holding balancer. It is easy to set, and since it is not necessary for the worker to carry out the tightening work by supporting a screw tightening rotary tool of considerable weight, the shape, type and size of the tightened object for screw tightening compared to the conventional method. Despite the differences, etc., the reaction force can always be absorbed and canceled reliably regardless of whether the tightened body is stationary or moving, and the work efficiency of screw tightening is greatly improved. can do.

[Brief description of drawings]

FIG. 1 is a front view of a reaction force canceling device according to an embodiment of the present invention.

FIG. 2 is a front view of the main part of the above.

FIG. 3 is a front view of a reaction force canceling device according to another embodiment.

[Explanation of symbols]

 A Article-holding balancer 1 Screw tightening rotary tool 2 Reaction force canceling bar 3 Strut 4a 1st arm 4b 2nd arm 4c 3rd arm 5 Cylinder-6 Connecting jig 7 Jig 8 Bolt B Item-holding balancer 10 Mobile dolly 11 Cylinder 12 Pressure regulator 13 Angle adjusting fitting 14 Reaction force canceling bar

Claims (3)

[Scope of utility model registration request] 1. A screw tightening rotary tool is connected and connected via a reaction force canceling bar to the tip of an article holding balancer mounted on a movable carriage or installed on the floor or the like. A reaction force canceling device for a screw tightening rotary tool. 2. A balancer for holding an article, a pillar fixed to a floor surface, a single-joint or multi-joint arm whose one end is pivotally attached to the pillar, and an intermediary between the pillar and the arm. And a cylinder for rotating the arm up and down.A connecting and connecting structure of a screw tightening rotary tool to a balancer for holding an article has a jig at the tip of the single-joint or multi-joint arm. 2. A reaction force canceling member for a screw tightening rotary tool according to claim 1, wherein the screw tightening rotary tool is connected to the other end part of the reaction force canceling bar having one end portion attached thereto. apparatus. 3. An article-holding balancer comprises a cylinder rotatably mounted upright on a moving carriage, and a connecting and connecting structure of a screw tightening rotary tool to the article-holding balancer has a rod of the cylinder. 2. A reaction force canceling bar, the one end of which is attached to a screw tightening rotary tool, is pivotally attached to the other end of the reaction tool canceling bar by means of a jig. Counter force canceling device for screw tightening rotary tools.