JP2005349537A - Spanner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spanner capable of efficiently rotating a nut even in a closed space. <P>SOLUTION: Handles 11, 12 have clamping parts 23, 33 and grip parts 25, 35. The handles 11, 12 are freely rotatably and pivotally supported by a connecting bolt 14. A freely openable/closable rotary engaging part 13 is mounted between the clamping parts 23, 33 of the handles 11, 12. A ratchet mechanism, which rotates the rotary engaging part 13 only in one direction, is provided. The nut 20 is engaged with the rotary engaging part 13. The rotary engaging part 13 is engaged with the nut 20. After that, the spanner is rotated in one direction. If the nut 20 is rotated to some extent, the work for returning the rotation in the opposite direction is repeated. The nut 20 is rotated in one direction after repeating such an operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a spanner as a tool for rotating a nut, and more particularly, to a tool having a ratchet mechanism that can efficiently rotate a nut even in a closed space.

  The applicant of the present application has proposed the following method as a method that can improve workability and can convert all parts to PCa (precast concrete).

  7 and 8 show the connection structure of PCa structural members proposed by the present applicant. 7 and 8, reference numerals 1a and 1b are reinforced concrete PCa structural members. Reinforcing bars 2a and 2b are embedded in the PCa structural members 1a and 1b, respectively. Sleeves 3a and 3b are driven into the PCa structural members 1a and 1b, respectively. The connecting rebar 4 is loosely inserted into the sleeve 3a of the PCa structural member 1a. As the connecting reinforcing bar 4, a deformed reinforcing bar whose outer periphery is threaded is used. A nut 6 is screwed to the tip of the connecting rebar 4 through a washer 7.

  As shown in FIG. 8, the nut 6 screwed to the connecting rebar 4 is rotated by the spanner 8 so that the connecting rebar 4 moves upward. When the nut 6 is rotated, the connecting rebar 4 moves along the sleeves 3a and 3b. When the tip of the connecting reinforcing bar 4 is inserted into the sleeve 3b of the PCa structural member 1b by a predetermined distance, the grout filling ports 5a, 5b and 5c, 5d are inserted into the sleeves 3a and 3b of the PCa structural member 1a and 1b. Grout material is injected. Thereby, both ends of the connecting reinforcing bar 4 are fixed in the sleeves 3a and 3b of the PCa structural members 1a and 1b, respectively.

  When building a structure by such a construction method, it is necessary to rotate the nut 6 in order to move the connecting rebar 4. In such a construction method, since the nut is positioned in the closed space 10, it is not possible to use a spectacle wrench, a box wrench, or the like that has an annularly closed portion that engages with the nut. For this reason, a tool having an opening 9 at the engaging portion of the nut is used like the double-ended wrench 8. However, in a tool such as the double-ended spanner 8, when the nut 6 is rotated, it is necessary to replace the spanner with the nut 6.

For example, Patent Document 1 discloses a box wrench having a ratchet mechanism. If a wrench provided with such a ratchet mechanism is used, the nut 6 can be efficiently rotated. However, in general, a ratchet mechanism is not provided in a tool having an opening 9 in an engaging portion of a nut, such as the double-ended spanner 8.
Patent Publication No. 9-225847

  As described above, in the above-described method, it is desired to efficiently rotate the nut 6, but the nut 6 comes to be positioned in the closed space 10, so that it engages with the nut such as a spectacle wrench or a box wrench. If the part to be closed is annular, it cannot be used. A tool having an opening 9 at the engaging portion of the nut, such as the double-ended spanner 8, does not include a ratchet mechanism. For this reason, the nut 6 cannot be rotated efficiently.

  In view of the above-described problems, an object of the present invention is to provide a spanner that can efficiently rotate a nut and can perform work even in a closed space.

  In order to solve the above-mentioned problems, a spanner according to the present invention is provided with a pair of handles pivotally supported, a clamping portion provided at one end of the pair of handles, and the other end of the pair of handles. Provided with a grip portion, an openable / closable rotational engagement portion mounted between a pair of handle gripping portions, and a ratchet mechanism for rotating the rotational engagement portion in only one direction. And the nut engaged with the rotation engagement portion by the ratchet mechanism is rotated in one direction.

  Preferably, the ratchet mechanism includes a serration formed on the outer periphery of the rotation engagement portion and a locking claw formed on the holding portion, and the serration and the locking claw are engaged in one direction. It is characterized by.

  Preferably, the rotation engagement portion is formed by connecting a plurality of engagement pieces, and a spring member for holding the rotation engagement portion in an open state is disposed at a portion where the engagement pieces are connected. It is characterized by.

  Preferably, the rotation engagement portion is formed of an elastic member, and the rotation engagement portion is held in an open state.

  According to the present invention, a pair of handles pivotally supported, a clamping part provided at one end of the pair of handles, a grip part provided at the other end of the pair of handles, and a pair of handles An openable and closable rotation engaging portion mounted between the holding portions and a ratchet mechanism that rotates the rotation engaging portion in only one direction. A nut is engaged with the rotation engaging portion, and the ratchet mechanism rotates the engagement portion. Since the nut engaged with the joint is rotated in one direction, the nut in the closed space can be rotated, and the nut can be rotated efficiently without changing the spanner. Can be done automatically.

  According to the present invention, the ratchet mechanism includes a serration formed on the outer periphery of the rotation engaging portion and a locking claw formed on the holding portion, and engages the serration and the locking claw in one direction. Therefore, the rotation engagement portion can be rotated only in one direction.

  Further, according to the present invention, the rotation engagement portion is formed by connecting a plurality of engagement pieces, and a spring member for holding the rotation engagement portion in an open state is disposed at a portion where the engagement pieces are connected. Thus, the rotation engagement portion can be easily opened and closed and strong strength can be obtained.

  In addition, according to the present invention, the rotation engagement portion is formed of an elastic member and holds the rotation engagement portion in an open state, so that the rotation engagement portion can be easily opened and closed. At the same time, weight reduction and cost reduction can be achieved.

First embodiment.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of a spanner to which the present invention is applied. As shown in FIG. 1, the spanner to which the present invention is applied pivotally supports the handles 11 and 12 by a connecting bolt 14, and a gap between a holding portion 23 at the tip of the handle 11 and a holding portion 33 at the tip of the handle 12. Further, the rotation engaging portion 13 is mounted. The handles 11 and 12 are rotatable about the connecting bolt 14, and the gripping portions 25 and 35 can be operated to open and close the clamping portions 23 and 33. FIG. 1A shows a state when the holding portions 23 and 33 are opened, and FIG. 1B shows a state when the holding portions 23 and 33 are closed.

  As shown in FIG. 2A, an arcuate holding portion 23 is formed at the tip of one handle 11. A groove portion 24 is formed along the inner periphery of the sandwiching portion 23. A grip portion 25 is formed on the other end of the handle 11. The grip portion 25 has a finger hole 26. Further, a fixing bolt 27 is attached to the end of the handle 11. A contact portion 28 is provided on the side surface of the handle 11. As shown in FIG. 2B, an arc-shaped holding portion 33 is formed at the tip of the other handle 12. A groove portion 34 is formed along the inner periphery of the sandwiching portion 33. A grip portion 35 is formed at the other end of the handle 12. The grip part 35 has a finger hole 36. Further, a fixing bolt 37 is attached to the end of the handle 12. Between the groove 24 at the tip of the handle 11 and the groove 34 at the tip of the handle 12, the rotational engagement portion 13 shown in FIG.

  Further, a locking claw 41 is provided in the groove 34 at the tip of the handle 12. The locking claw 41 constitutes a ratchet mechanism together with the serration 51 of the rotation engaging portion 13.

  FIG. 3 shows the configuration of the rotation engaging portion 13. The rotary engaging portion 13 is configured by connecting six engaging pieces 50a, 50b, 50c, 50d, 50e, and 50f made of, for example, steel by connecting portions 55a, 55b, 55c, 55d, and 55e. That is, the engaging piece 50a and the engaging piece 50b are connected by the connecting portion 55a. The engaging piece 50b and the engaging piece 50c are connected by the connecting portion 55b. The engaging piece 50c and the engaging piece 50b are connected by the connecting portion 55c. The engaging piece 50d and the engaging piece 50e are connected by the connecting portion 55d. The engaging piece 50e and the engaging piece 50f are connected by the connecting portion 55e.

  The connecting portions 55a, 55b, 55c, 55d, and 55e connect the engaging pieces 50a to 50f with pins. For example, in the connecting portion 55b, as shown in FIGS. 3C and 3D, the engaging piece 50c and the engaging piece 50b are rotatably connected by the pin 56. A spring member 57 is provided on the connecting portion 55b. By this spring member 57, the engaging piece 50b is urged in the direction of the arrow B1.

The rotation engagement portion 13 can be opened and closed from between the engagement piece 50a and the engagement piece 50f.
3A shows a state when the rotation engaging portion 13 is closed, and FIG. 3B shows a state when the rotation engaging portion 13 is opened.

  As shown in FIGS. 3C and 3D, a spring member 57 is provided at each of the connecting portions 55a, 55b, 55c, 55d, and 55e. The rotational engagement portion 13 urged by the spring member 57 is in an open state as shown in FIG. 3B when no force is applied from the outside.

  Magnets 58a and 58b are provided on the engagement pieces 50a and 50f. When the rotation engagement portion 13 is closed, the magnets 58a and 58b are attracted so that the rotation engagement portion 13 is not easily opened.

  A serration 51 is provided on the outer periphery of the rotation engaging portion 13. The serration 51 is engaged with the locking claw 41 of the groove portion 34 of the handle 11 to constitute a ratchet mechanism. An opening 52 is formed on the inner periphery of the rotation engaging portion 13. When the rotation engaging portion 13 is closed, the opening 52 has a hexagonal shape corresponding to the shape of the nut, as shown in FIG.

  FIG. 4 is an explanatory diagram of the ratchet mechanism. As described above, the locking claw 41 is provided in the groove 34 at the tip of the handle 12. As shown in FIG. 4A, the locking claw 41 is attached so as to be rotatable around a pin 43. A spring 42 for biasing the locking claw 41 is provided with respect to the locking claw 41. Further, a stopper pin 44 that restricts the position of the locking claw 41 is provided.

  Although the locking claw 41 receives a rotational force from the spring 42, there is a stopper pin 44 in that direction. Therefore, if no force is applied from the outside, the locking claw 41 is in a position regulated by the stopper pin 44. When the locking claw 41 is pushed, the locking claw 41 rotates in that direction, and when released, the locking claw 41 returns to a position regulated by the stopper pin 44 by the urging force of the spring 42.

  As shown in FIG. 4B, the rotation engagement portion 13 is mounted between the holding portion 23 at the tip of the handle 11 and the holding portion 33 at the tip of the handle 12. When the rotary engaging portion 13 is mounted between the sandwiching portion 23 and the sandwiching portion 33 and the sandwiching portions 23 and 24 are closed, the locking claw 41 comes into contact with the serration 51.

  The locking claw 41 is arranged upward, and the locking claw 41 is biased by a spring 42. Therefore, when the clamping parts 23 and 33 are rotated in the direction of the arrow A1, the locking claw 41 and the serration 51 are engaged with each other, and the rotational force is transmitted to the nut 20 through the rotation engaging part 13, and the nut 20 is moved to the arrow A1. Rotate in the direction.

  On the other hand, when the clamping parts 23 and 33 are rotated in the direction of the arrow A2, the locking claw 41 is detached from the serration 51. For this reason, even if the clamping parts 23 and 33 are rotated in the arrow A2 direction, the rotational force is not transmitted to the nut 20 and the nut 20 does not rotate. Thus, only when the clamping parts 23 and 33 are rotated in the direction of the arrow A1, the nut 20 is rotated and the ratchet mechanism is activated.

  FIG. 5 is an explanatory diagram of a method of using a spanner to which the present invention is applied. When using the spanner to which the present invention is applied, the operator puts a finger into the finger holes 26 and 36, holds the grip portions 25 and 35, and holds the spanner. And as shown to FIG. 5 (A), the clamping parts 23 and 33 are made into an open state. At this time, the rotation engaging portion 13 is also opened. Then, the nut 20 is positioned in the rotation engaging portion 13.

  When the nut 20 is positioned in the rotation engaging portion 13, the grip portions 25 and 35 are gripped, and the clamping portions 23 and 33 are closed as shown in FIG. When the clamping parts 23 and 33 are closed, the rotation engagement part 13 is also closed, and the rotation engagement part 13 is engaged with the outer diameter of the nut 20.

  When the rotation engaging portion 13 is engaged with the outer diameter of the nut 20, the operator rotates the spanner in one direction with the holding portions 23 and 33 closed, and when the nut 20 is rotated to some extent, The operation of rotating in the opposite direction while 33 is closed is repeated. Since the rotation engagement portion 13 is provided with a ratchet mechanism, the nut 20 continues to rotate in one direction when such operations are repeated.

  Thus, in the spanner to which the present invention is applied, the nut 20 can be rotated only when the holding portions 23 and 33 are rotated in one direction by the ratchet mechanism. For this reason, a nut can be rotated efficiently. When the grip portion is opened, the rotation engagement portion 13 is opened together with the grip portions 23 and 33. For this reason, the nut in the closed space can also be rotated.

  When the nut is rotated in the opposite direction, the entire spanner may be turned over.

  If a plurality of rotation engaging portions 13 having different sizes of the opening 52 are prepared and these various rotation engaging portions 13 are replaced, various types of nuts can be handled.

Second embodiment.
FIG. 6 shows a second embodiment of the present invention. In the first embodiment described above, the rotary engaging portion 13 connects, for example, six engaging pieces 50a, 50b, 50c, 50d, 50e, and 50f made of steel by the connecting portions 55a, 55b, 55c, 55d, and 55e. Is configured. On the other hand, in this embodiment, the rotation engaging portion 13 is integrally molded with a member having elastic performance such as hard rubber or hard plastic. Other parts are the same as those in the first embodiment. The rotation engaging portion 13 is cut by the cutting portion 53 and can be opened and closed. FIG. 6A shows a state when the rotation engaging portion 13 is closed, and FIG. 6B shows a state when the rotation engaging portion 13 is opened. The rotation engaging portion 13 is processed so as to have a shape as shown in FIG. 6B when no force is applied from the outside.

  In the second embodiment, since the rotation engaging portion 13 is formed of hard rubber, the strength is reduced, but the cost can be reduced, the tool is lightened, and handling is simplified.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and applications are possible without departing from the gist of the present invention.

It is a top view which shows the whole spanner structure of 1st Embodiment of this invention. It is a partial cross section figure for demonstrating the spanner of 1st Embodiment of this invention. It is explanatory drawing of an example of the rotation engaging part in the spanner of 1st Embodiment of this invention. It is explanatory drawing of the ratchet mechanism in the spanner of 1st Embodiment of this invention. It is explanatory drawing of the usage method of the spanner of 1st Embodiment of this invention. It is explanatory drawing of the other example of the rotation engaging part in the spanner of 2nd Embodiment of this invention. It is sectional drawing used for description of PCa construction method. It is sectional drawing used for description of PCa construction method.

Explanation of symbols

11 Handle 12 Handle 13 Rotating engagement portion 14 Connecting bolt 20 Nut 23, 33 Nipping portion 24, 34 Groove portion 25, 35 Grip portion 26, 36 Finger hole 27, 37 Fixing bolt 28 Contact portion 41 Locking claw 42 Spring 43 Pin 44 Stopper pins 50 to 50f Engagement piece 51 Serration 52 Opening 53 Cutting portions 55a to 55e Connection portions 56 Pins 57 Spring members 58a and 58b Magnets

Claims (4)

A pair of pivotally supported handles;
A clamping portion provided at one end of the pair of handles;
A grip portion provided at the other end of the pair of handles;
An openable and closable rotation engaging part mounted between the pair of handles;
A ratchet mechanism that rotates the rotation engagement portion only in one direction,
A spanner, wherein a nut is engaged with the rotation engagement portion, and the nut engaged with the rotation engagement portion is rotated in one direction by the ratchet mechanism. The ratchet mechanism includes a serration formed on the outer periphery of the rotation engagement portion and a locking claw formed on the clamping portion, and engages the serration and the locking claw in one direction. The spanner according to claim 1. The rotation engagement portion is formed by connecting a plurality of engagement pieces, and a spring member for holding the rotation engagement portion in an open state is disposed at a portion connecting the engagement pieces. The spanner according to claim 2. The spanner according to claim 2, wherein the rotation engagement portion is formed of an elastic member and holds the rotation engagement portion in an open state.

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