Plate-shaped locking nut mounting tool

Abstract

To improve efficiency of a plate-shaped nut mounting work, and prevent the plate-shaped nut from falling during the work.SOLUTION: A mounting device 1 comprises a guide wire 2 whose base end side is connected to something worn by the worker, to the tip side of which an adsorption member 3 is bonded that magnetically adsorbs to the tip of a bolt B, and which is inserted into multiple plate-shaped nuts R in the middle. A holding member 4 is fixed to the guide wire 2. The holding member 4 comprises: an introduction part 41 with a diameter smaller than a screw hole of the plate-shaped nut R; and an enlarged-diameter part 42 whose outer diameter gradually increases from the introduction part 41 toward the tip side of the guide wire 2 and can elastically contract. The worker sends the plate-shaped nut R, through which the holding member 4 is passed from a collected nut group S, toward the tip side of the guide wire 2, and positions the nut at the tip of the bolt B via the adsorption member 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an attachment device for plate-shaped anti-loosening nuts that are placed on top of nuts and screwed onto bolts to prevent the nuts from loosening when screwed onto the bolts, and aims to improve the efficiency of attachment work at high altitudes such as on top of transmission towers and to prevent the plate-shaped nuts from falling during attachment work. [Background technology]

[0002] Patent Document 1 discloses a nut fall prevention device that allows a worker to efficiently position a nut on a bolt without accidentally dropping it when attaching the nut to a bolt attached to an object to be fastened. This tool includes a nut insertion member through which multiple nuts are inserted in series, a nut holder that controls the release and retention of the nuts from the nut holder, an attraction member that adheres to the tip surface of the bolt, and an expandable coiled wire that connects the nut holder to the nut insertion member. The nut holder has a locking mechanism that prevents the nut from coming out of the nut insertion member when in the locking position, but allows the nut to be released from the nut insertion member when in the retracted position. The coiled wire serves as a guide that moves the nut released from the nut holder to the attraction member that is attracted to the tip of the bolt without dropping it. The attraction member positions the nut at the threading position of the tip of the bolt. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-002530 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional nut fall-off prevention device, it is difficult for a worker wearing work gloves to push in the small locking pieces of the nut holder and to remove the nuts one by one. If the load of many nuts held in the nut holder is applied to the suction member during work, the suction member may come off the tip of the bolt, causing the nuts to fall. Therefore, an object of the present invention is to provide an attachment tool for plate-shaped locking nuts that can hold an assembly of many plate-shaped locking nuts without applying load to an attraction member that is magnetically attracted to a bolt, and can detach and remove the plate-shaped locking nuts one by one from the assembly and move them to the tip of the bolt without requiring delicate work such as pushing in small locking pieces. [Means for solving the problem]

[0005] In the following description, reference will be made to the numerals in the accompanying drawings, but the present invention is not limited thereto. To solve the above problems, the present invention provides an installation tool 1 for plate-shaped locking nuts R. The base end of the installation tool 1 is connected to an attachment such as a belt or tool bag worn by an operator, the tip end of which is connected to an attraction member 3 that can magnetically attract the tip of a bolt B, and the guide wire 2 is inserted through an accumulated nut group S, which is a collection of multiple plate-shaped nuts R. A retaining member 4 is fixed to the guide wire 2 distal to the accumulated nut group S, and can adjust the resistance to passage of the plate-shaped nuts R through the threaded holes by elastically expanding or contracting its outer diameter. The retaining member 4 has an introduction section 41 on the accumulated nut group S side, which has a smaller diameter than the threaded hole, and an elastically contractible diameter expansion section 42 whose outer diameter gradually increases from the introduction section 41 toward the distal end of the guide wire 2. The operator can feed individual plate-shaped nuts R from the accumulated nut group S toward the distal end of the guide wire 2 by passing the retaining member 4 through the guide wire 2. [Effects of the Invention]

[0006] According to the present invention, the collected nut group S with the guide wire 2 inserted therethrough is held by the holding member 4, and its load is supported by the worker's clothing, so the load of the collected nut group S is not transmitted to the suction member 3 located further ahead. As a result, the suction member 3 attached to the tip of the bolt B can maintain its self-sustaining suction, leaving both hands free for the worker. The work of passing a single plate nut R at the tip of the collected nut group S through the holding part 4 and sending it to the suction member 3 can be easily done with both hands. There is also no risk of the plate nut R falling during the transfer work. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is an explanatory diagram of a locking nut according to the present invention in use; [Figure 2] 2 is a cross-sectional view of a retaining member in the locking nut mounting tool of FIG. 1. FIG. [Figure 3] 10A and 10B show another embodiment of a retaining member in a locking nut fastener according to the present invention, where (a) is a front view and (b) is a cross-sectional view. [Figure 4] FIG. 2 is a perspective view of a holder in the locking nut fastener according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described with reference to the drawings. The plate-shaped nut R for preventing loosening is placed on top of the nut N and screwed onto the bolt B to prevent the bolt B and nut N from loosening, which are fastening required parts of a structure or the like. For example, when the bolt B and nut N are to be installed at a high place such as on a transmission tower, the locking nut installation tool 1 of the present invention is used to efficiently guide and position the plate-shaped nut R onto the tip of the bolt B without dropping it during installation.

[0009] In the figure, the anti-loosening nut attachment device 1 comprises a guide wire 2 connected to the operator at the base end, a magnetic attraction member 3 connected to the tip of the guide wire 2, and a retaining member 4 fixed to the middle part of the guide wire 2 near the operator.

[0010] The guide wire 2 is made of a material such as a stranded metal wire having spring elasticity, and is connected via a connector 5 to an attachment such as a tool bag or harness worn by the worker.

[0011] A magnetically attracted member 3 is connected to the tip of the guide wire 2 via a universal joint 6. The magnetically attracted member 3 has a magnet built into a cylindrical section 31 whose diameter is slightly smaller than the screw hole in the plate nut R, and can be attracted by aligning its tip with the center of the tip of the bolt B. A ball plunger 32 is attached to the cylindrical section 31 so as to protrude from the outer periphery. The ball plunger 32 prevents the plate nut R from passing naturally, but with the magnetically attracted member 3 attracted to the bolt B, the operator can push the plate nut R, which has been transferred via the guide wire 2, forward to pass it toward the bolt B.

[0012] The guide wire 2 can be inserted from the base end side into the screw holes of the plate nuts R, and can hold a large number of plate nuts R in a pile during extension.

[0013] The holding member 4 is used to hold the nut group S as a stock in the middle of the guide wire 2, and includes a cylindrical introduction portion 41 and an expanding portion 42 whose outer diameter gradually increases from the introduction portion 41 toward the tip of the guide wire 2. The outer diameter of the introduction portion 41 is smaller than the threaded hole of the plate nut, allowing the plate nut R to be fitted onto it. The expanding portion 42 is composed of a number of elastic segments 43 divided in the circumferential direction, and controls the passage and retention of the plate nut R by elastically expanding and contracting the outer diameter. When the operator pushes the plate nut R, the outer diameter of the expanding portion 42 automatically contracts, allowing it to pass through the holding member 4.

[0014] The operator can separate the individual plate-shaped nuts R from the accumulated nut group S, pass them through the holding member 4, and send them onto the guide wire 2 to the suction member 3.

[0015] The worker passes the guide wire 2 through the integrated nut group S and holds it with the holding member 4, then connects the base end of the guide wire 2 to a tool bag, harness, etc. via the connecting device 5, and carries the mounting device 1 to the vicinity of the installation position of the bolt B.

[0016] Next, the tip of the attraction member 3 is magnetically attracted to the tip of the bolt B. The guide wire 2 supports the load of the integrated nut group S, but since this load is applied to the operator on the base end side, the load is not applied to the guide wire 2 on the distal side of the holding member 4. This allows the operator to freely manipulate the distal end side of the guide wire 2, and also allows the attraction member 3 to remain attracted to the bolt B regardless of the installation angle of the bolt B.

[0017] When bolt B is attached to a narrow space in a structure such as a steel tower, the guide wire 2 may interfere with surrounding components, making it difficult to attach the suction member 3 to the tip of the bolt B. The universal joint 6 allows the bending radius of the guide wire 2 to be reduced, making it easy to avoid interfering objects when using the guide wire.

[0018] Next, one plate nut R located at the tip end of the collected nut group S is passed through the holding member 4 and sent to the suction member 3, where it is fitted into the suction member 3 and then moved over the ball plunger 32 to its tip and screwed onto the bolt B. Because the load of the collected nut group S is not applied to the suction member 3, the worker can work with both hands free. It is also possible to reserve multiple plate nuts R between the holding member 4 and the suction member 3, as long as the load on the suction member 3 is not excessive.

[0019] Another embodiment of the retaining member 4 is shown in Figure 3. This retaining member 4 has a reduced diameter section 44 whose outer diameter gradually decreases continuously from the tip of the expanded diameter section 42 in the previous embodiment. This reduced diameter section 44 is also made up of a number of elastic segments 43 divided in the circumferential direction.

[0020] When the operator moves, a holder 7 for holding the suction member 3 is engaged with the connector 5. As shown in Fig. 4, the holder 7 has a slot 71 through which the guide wire 2 passes and a holding recess 72 into which the cylindrical portion 31 of the suction member 3 is fitted. [Explanation of symbols]

[0021] 1 Mounting fixture 2 guidewires 3. Adsorption material 4 Retaining member 41 Introduction 42 Expanded diameter part 43 Elastic Segment 44 Reduced diameter part 5 Connectors 6 Universal joint 7 Holder 71 Suriwari 72 Retaining recess B Bolt N nut R Plate Nut S Integrated Nut Group

Claims

1. A fitting for a plate nut that is threaded onto a bolt and placed on top of the nut to prevent the nut from loosening, a guide wire that is connected to an article worn by an operator at a base end side, has an attraction member that can be magnetically attracted to the tip of the bolt at a tip end side, and is inserted through an integrated nut group that accumulates a large number of the plate-shaped nuts at an intermediate portion; a retaining member that is fixed to the outer periphery of the guide wire on the distal side of the integrated nut group and that can adjust the resistance to passage of the plate-shaped nut through the screw hole by elastically expanding and contracting its outer diameter, the retaining member includes an introduction portion on the integrated nut group side, the introduction portion having a diameter smaller than that of the screw hole, and an expanded diameter portion whose outer diameter gradually increases from the introduction portion toward the distal end side of the guide wire and which is elastically contractible; An attachment device for plate-shaped anti-loosening nuts, characterized in that it is configured so that an individual plate-shaped nut separated from the group of integrated nuts can be passed through the holding member and fed out to the tip side of the guide wire.

2. 2. The fastener for a plate-shaped locking nut according to claim 1, wherein the enlarged diameter portion of the retaining member is composed of a number of elastic segments divided in the circumferential direction.

3. The retaining member is provided with a reduced diameter portion whose outer diameter gradually decreases continuously from the tip of the expanded diameter portion, and the expanded diameter portion and the reduced diameter portion are composed of a number of elastic segments divided circumferentially.

4. 4. The fastener for a plate-shaped locking nut according to claim 1, wherein the suction member is connected to the tip of the guide wire via a universal joint.

5. 5. A plate-shaped locking nut attaching device according to claim 1, wherein the suction member has a ball plunger protruding from the outer periphery of its cylindrical portion so as to prevent the plate nut from passing through naturally while allowing the operator to manually pass the plate nut transported via the guide wire, and the plate nut that has passed through the ball plunger can be positioned at a position where it can be screwed onto the tip of the bolt when it is in a state of being attracted to the bolt.

Images