JP2012161895A - Wrench having gear mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wrench that can efficiently perform work at a point where the oscillation operation of the wrench, a spanner or the like is limited due to an obstacle or a narrow working space when fastening or loosening a bolt by using the wrench, the spanner or the like.SOLUTION: The wrench is provided with a head in which an angular drive for attaching a socket engaged with a bolt head is protruded from a body, a gear part composed of a gear row which is engaged with a gear of the head, and an input member having an angular hole at the other end of the gear part. A rachet mechanism for regulating the rotation direction from a handle side is engaged with the input member, and the center of the oscillation operation is moved to the input member in almost the center of the wrench by the bolt head by attaching a conventional ratchet wrench to the angular hole of the input member, thus enabling the operation of the attached conventional ratchet wrench.

Description

  In the present invention, when a bolt or nut is tightened or loosened with a wrench or the like, the swinging operation of the wrench or the like is an obstacle or a narrow operation space, so that the bolt or nut is tightened or loosened at a place where the operation is restricted. The present invention relates to a wrench that can be operated efficiently and a wrench that can handle a plurality of bolts and nuts of different sizes.

Originally, the ratchet wrench is a wrench with an integral structure in which the socket is incorporated in the wrench head part, but the ratchet wrench of the present invention includes one in which the socket is fitted to the socket fitting part of the wrench head part, and A wrench that does not have a ratchet mechanism from the ratchet wrench is represented as a socket wrench, and the wrench of the present invention represents a ratchet wrench or a socket wrench.

When the swinging operation of a handle such as a wrench or spanner is an obstacle or a narrow operation space, the wrench cannot swing over a wide range, so the bolt or nut tightening or loosening operation (hereinafter referred to as bolt tightening operation) is narrow. It was a wrench operation within the operation range, which required a lot of work and was inefficient.

In order to solve the above problems, the range of swinging operation of the wrench can be increased somewhat by shortening the handle such as a wrench, but the tightening operation of the bolt with a large torque can be achieved by shortening the handle. become unable.

  In addition, when the bolt is tightened, a wrench having a socket of another size has to be used every time the size of the bolt is changed, resulting in a problem of poor work efficiency.

  In the wrench of Patent Document 1, a square hole is formed in a handle portion shorter than usual of the ratchet wrench, and a square drive of a torque wrench is fitted into this square hole, and the ratchet wrench also swings in conjunction with the swing operation of the torque wrench. In addition, the bolt can be tightened even in a narrow operating range. Further, the wall surface of the square hole is set to 45 degrees with respect to the central axis of the handle of the ratchet wrench, thereby causing an angular difference of 45 degrees between the central axis of the ratchet wrench and the central axis of the torque wrench, It is intended to avoid the problem that the handle tail end of the torque wrench is in contact with the wall surface of the tightening site and difficult to rotate.

  Further, the 4-size set ratchet wrench of Patent Document 2 is a ratchet wrench having four types of different-sized boxes having sockets having boxes of different sizes on both sides at both ends of the handle. By being separable, it becomes a ratchet wrench having a box of four different sizes by combining with another separation handle.

  However, in Patent Document 1, when the torque wrench is swung, the ratchet wrench of Patent Document 1 is swung at the same time. If each handle comes into contact with the wall surface of the tightening site, the swing operation cannot be performed. The operation range at is very narrow.

  Moreover, although patent document 2 can respond | correspond to four types of bolt sizes, in order to respond | correspond to the bolt size of a larger type, it must exchange with another isolation | separation handle and must change the combination of a socket.

Japanese Utility Model Publication No. 07-014677 Japanese Utility Model Publication No. 05-053863

  In view of the drawbacks of the prior art described above, the wrench of the present invention is a wrench as a means that enables the bolt to be tightened as long as the socket can be fitted to the bolt even if the swinging operation of the wrench is difficult. Further, by providing a socket corresponding to a plurality of sizes of bolts, only a wrench of the present invention can be used to handle tightening of various types of bolts.

  A head part having a socket part for fitting a bolt head or a nut, or a head part having means for attaching a socket for fitting a bolt head or a nut, and a gear train comprising a plurality of gears A gear part constituted by is connected to the head part, and an operation handle is also connected to the gear part, for mounting a socket part or a socket for fitting a bolt head or a nut. A gear is engraved on the outer periphery of the means, a terminal gear of the gear train is engaged with the gear, and a gear is also engraved on the outer periphery of the input means for obtaining input from the outside. The gear is characterized in that the gear at the start of the gear train is engaged with the gear.

  A ratchet mechanism for restricting the rotation direction is engaged with a gear engraved on the outer periphery of the input means meshed with a starting gear composed of a gear train composed of a plurality of gears.

  One having a ratchet mechanism in which a gear portion composed of a gear train composed of a plurality of gears is used as a transmission gear mechanism, or one having no ratchet mechanism.

  One having a ratchet mechanism in which a socket part for fitting a bolt head or a nut is installed in a plurality of appropriate gears of a gear part constituted by a gear train composed of a plurality of gears.

  When tightening bolts, the wrench socket can be fitted to the bolt head in a narrow operating space, but the handle of the wrench abuts against the wall surface of the tightening site and the wrench cannot be swung sufficiently. Even if the bolt cannot be tightened, the conventional ratchet wrench is attached to the input means for obtaining input from the outside of the gear part, and the bolt is tightened by swinging the handle of the conventional ratchet wrench. Can be operated.

  In the wrench not having the ratchet mechanism of the wrench of the present invention, the bolt is tightened in one rotation direction by the swinging operation of the conventional ratchet wrench by the action of the ratchet mechanism of the conventional ratchet wrench.

  In the initial stage of tightening the bolt with the conventional ratchet wrench, if the swing return operation is performed when there is almost no rotation resistance of the bolt and nut, the conventional ratchet wrench ratchet mechanism does not work and the bolt for the swing return angle When the conventional ratchet wrench is attached to the wrench having the ratchet mechanism of the present invention and the bolt tightening operation (oscillation return operation) is performed, the wrench of the wrench having the ratchet mechanism of the present invention The bolt will not loosen even if the swing return operation is performed.

  Furthermore, by making the gear part a transmission gear mechanism, a booster gear mechanism (reduction gear mechanism) that can obtain a large output with a small input due to the gear ratio of the gear mechanism, or a large number of revolutions with a small handle swinging operation. It can be set as the obtained fast-rotating gear mechanism (speed-up gear mechanism).

  Furthermore, by installing socket parts of different sizes for fitting bolt heads or nuts to a plurality of appropriate gears of the gear part on both sides of the gear, the wrench only of the present invention can be carried around. Since it is possible to tighten bolts or nuts of various sizes, work efficiency can be improved.

  Moreover, the wrench having the ratchet mechanism of the wrench of the present invention can be used alone without using a conventional ratchet wrench. The wrench of the present invention is a wrench having the gear mechanism of the present invention, and the conventional ratchet wrench is attached to the input part (such as a square hole or hexagonal column) of the input member of the wrench of the present invention, It is a ratchet wrench for operating the wrench of the present invention.

It is the perspective view which shows the wrench which has the gear mechanism of 1st Embodiment, AA sectional drawing, and BB sectional drawing. It is the perspective view which shows the wrench which has the gear mechanism of 2nd Embodiment, AA sectional drawing, and BB sectional drawing. It is the perspective view which shows the wrench which has the gear mechanism of 3rd Embodiment, AA sectional drawing, and BB sectional drawing. It is the perspective view which shows the wrench which has the gear mechanism of 4th Embodiment, AA sectional drawing, and BB sectional drawing. It is the perspective view which shows the wrench which has the gear mechanism of 5th Embodiment, AA sectional drawing, and BB sectional drawing. It is the perspective view which shows the wrench which has the gear mechanism of 6th Embodiment, AA sectional drawing, and BB sectional drawing. It is the perspective view which shows the wrench which has the gear mechanism of 7th Embodiment, AA sectional drawing, and BB sectional drawing. It is a perspective view which shows the conventional ratchet wrench. It is the implementation figure which performs the bolting operation of the volt | bolt using the conventional ratchet wrench in the narrow operation space, and the front view of the conventional ratchet wrench. FIG. 5 is a view showing a wrench having the gear mechanism of the first embodiment and a bolt tightening operation by attaching the conventional ratchet wrench to the wrench having the gear mechanism of the first embodiment, and a wrench having the gear mechanism of the first embodiment. It is a front view which shows the state which mounted | wore the wrench. FIG. 5 is a diagram illustrating a tightening operation of a bolt by attaching a wrench having the gear mechanism of the first embodiment to a wrench having the gear mechanism of the first embodiment and further attaching a conventional ratchet wrench in a narrow operation space; and It is a front view which shows the state which mounted | wore the wrench which has the gear mechanism of 1st Embodiment with the wrench which has the gear mechanism of 1st Embodiment, and also mounted | worn with the conventional ratchet wrench. It is operation | movement explanatory drawing when attaching the conventional ratchet wrench to the wrench which has the gear mechanism of 1st Embodiment, and performing bolting operation of the conventional ratchet wrench. It is operation | movement explanatory drawing when attaching the conventional ratchet wrench to the wrench which has the gear mechanism of 2nd Embodiment, and performing bolting operation with the conventional ratchet wrench. It is operation | movement explanatory drawing when bolting operation is performed with the wrench which has the gear mechanism of 2nd Embodiment.

  Embodiments of the present invention will be described in detail with reference to the drawings. In addition, each AA sectional drawing is a cross-sectional view seen from the front (front side), and BB sectional drawing is a longitudinal sectional view seen from the upper surface. The positional relationship in the following description is described based on the positions shown in the drawings.

  The wrench having the gear mechanism of the first embodiment will be described in detail with reference to FIG. As shown in the figure, the head portion 1 is provided at the left end, the gear portion 2 is provided at the left end, and the handle portion 3 is provided at the right end, and the whole (main body) is formed of iron. A head member 11 on which a square drive 15 as a means for mounting a socket is protruded from the head portion 1 is rotatably mounted on the main body. A gear is formed on the outer peripheral surface of the head member 11. A gear body having a gear portion 12. The square drive 15 is a regular quadrangular columnar body projecting from the upper surface of the main body, and a ball 16 urged outward by a spring when a socket is mounted on one side is inserted to prevent the socket from falling off. .

  The gear portion 2 is composed of a gear train and a gear portion 6 of an input member 5 to be described later. The gear train is composed of three gears 6, 6, 6. Each gear shaft 7, 7, 7 is Bearings 8, 8 and 8 are pivotally supported on the main body. The terminal gear 6 of the gear train is engaged with the gear portion 12 of the head member 11, and the start gear 6 of the gear train is a gear body having a gear engraved on the outer peripheral surface for obtaining input from the outside. It meshes with the gear portion 6 of the input member 5 as input means. The input member 5 has a regular square hole 51 formed in the lower surface, and is rotatably mounted on the main body. A conventional ratchet wrench angular drive can be inserted into the square hole 51 from the lower surface side. The starting gear 6 of the gear train is a gear that meshes with the gear portion 6 of the input member 5, and the terminal gear 6 is a gear that meshes with the gear portion 12 of the head member 11.

  Further, the notches 9, 9, 9, and 9 formed in the side surface of the gear portion 2 are lubrication holes for maintaining lubrication of the gears 6, 6, 6 of the gear train and the gear portion 6 of the input member 5. It is also intended to reduce the weight. The notches 9, 9, 9, 9 are not particularly troublesome even if they are not installed on the mechanism.

Furthermore, the handle part 3 is extended from the right side of the gear part, and becomes a grip part when the wrench of the present invention is fixed and when it is operated alone.

Next, the operation of the wrench having the gear mechanism of the first embodiment will be described. First, as shown in FIGS. 9A and 9B, when the bolt 230 of the flange 220 of the pipe 210 is tightened in the piping pit 200 (narrow operation space) using the conventional ratchet wrench 100, the conventional method is used. The socket 110 of the ratchet wrench 100 is fitted to the head of the bolt 230 and the handle 230 is swung to tighten the bolt 230. However, since the operation space is small, the swing operation range in the case of the conventional ratchet wrench 100 is as follows. In the case of another bolt, the ratchet wrench 100-1 is in a state where there is no swinging operation range at all by merely fitting the socket 110 to the head of the bolt 230. As described above, the bolt tightening operation in the narrow operation space by the conventional ratchet wrench is very difficult and takes time. It should be noted that when the bolt is tightened, the nut must naturally be fixed with a spanner or a wrench, but the nut is assumed to be fixed and the description is omitted. Normally, when a bolt or nut is tightened, the bolt is fixed and the nut is rotated and tightened, but in this description, the bolt is rotated and tightened. Hereinafter, the wrench having the gear mechanism of the first embodiment is referred to as the wrench of the first embodiment, and the same applies to the wrench of the second embodiment and thereafter.

The method for operating the wrench according to the first embodiment will be described in detail with reference to FIGS. In the state where the socket part 110 is mounted on the corner drive 15 of the wrench 10 of the first embodiment and the socket part 110 is fitted to the head of the bolt 230, the square hole of the input member 5 of the wrench 10 of the first embodiment. A corner drive 15 of a conventional ratchet wrench 100 is attached to 51. At this time, it is assumed that the switching lever 4 of the ratchet mechanism of the conventional ratchet wrench 100 is switched to the side to which the bolt 230 is tightened. As can be seen from FIG. 10, the swing operation range of the wrench 10 of the first embodiment is as narrow as the conventional ratchet wrench 100 of FIG. 9, but is attached to the square hole 51 of the input member 5 of the wrench 10 of the first embodiment. The conventional ratchet wrench 100 can have a wide range (b) of swing operation range. When the bolt 230 is tightened, the conventional ratchet wrench 100 is swung while the handle portion 3 is fixed so that the wrench 10 of the first embodiment does not swing. Note that when the conventional ratchet wrench 100 swinging operation is performed without fixing the wrench 10 of the first embodiment, a counter-torque is generated due to a reaction, and the wrench 10 of the first embodiment rotates, and the wrench 10 of the first embodiment is rotated. The handle portion 3 is placed against an obstacle or the like, and the wrench 10 of the first embodiment is in a fixed state. Even in the case of another bolt, the bolt tightening operation by the wrench 10-1 of the first embodiment and the conventional ratchet wrench 100-1 can be in a wide range (c) of swing operation range as described above. As described above, the bolt tightening operation (see FIG. 9) using only the conventional ratchet wrench is a swing operation of the ratchet wrench centered on the bolt, whereas the wrench of the first embodiment In the bolt tightening operation in combination with the conventional ratchet wrench, the center of the swing operation of the conventional ratchet wrench is moved from the bolt to the square hole 51 of the input member 5 of the wrench of the first embodiment, so that the narrowing operation is performed. The swing operation range can be expanded even in a space, and the bolt tightening operation can be performed easily and in a short time.

The operation of the wrench 10 of the first embodiment will be described with reference to FIG. When the bolt is tightened, the socket part 110 is attached to the corner drive 15 of the head member 11 of the wrench 10 of the first embodiment, and the socket part 110 is fitted to the head of the bolt 230. Further, when the square drive 15 of the conventional ratchet wrench 100 is fitted in the square hole 51 of the input member 5, if the conventional ratchet wrench 100 is swung in the direction of arrow e from the tightening start position (note that the first The wrench 10 of the embodiment is assumed to be fixed.) Since the square drive 15 of the conventional ratchet wrench 100 is switched to the side where the switching lever 4 is tightened with the bolt 230, the swing of the conventional ratchet wrench 100 is assumed. The input member 5 of the wrench 10 of the first embodiment is also rotated in the direction of the arrow r by the rotation of the angular drive 15 of the conventional ratchet wrench 100. The gears 6, 6, 6 of the gear train of the gear portion 2 meshing with the gear portion 6 of the input member 5 also rotate, and the rotation of the gear train of the gear portion 2 is transmitted to the gear 12 of the head member 11, The head member 11 rotates in the arrow r direction. As the head member 11 rotates, the socket 110 also rotates, whereby the bolt 230 rotates in the direction of the arrow r and the bolt 230 is tightened.

  Next, when the conventional ratchet wrench 100 is swung back in the direction of arrow f from the tightening end position, the square drive 15 of the conventional ratchet wrench 100 causes the bolts to be loosened by the action of the ratchet mechanism of the conventional ratchet wrench 100. Thus, only the conventional ratchet wrench 100 is swung back to the tightening start position.

  As described above, by swinging the conventional ratchet wrench 100 around the input member 5 of the wrench 10 of the first embodiment, the bolt 230 is gradually moved via the wrench 10 of the first embodiment. It will be tightened. If the number of gears of the gear portion 2 is an odd number (three in the wrench 10 of the first embodiment), the rotation direction of the input member 5 and the rotation direction of the head member 11 are the same, resulting in an erroneous operation. Leads to prevention.

The wrench swing range when tightening the bolt is described as the start position, the initial position of the wrench in the tightening operation, and the start position of the swing wrench after the tightening operation as the end position. Also, when the ratchet wrench is switched to the side where the bolt of the ratchet mechanism is tightened, when the ratchet wrench is swung, the ratchet wrench rotates in the direction that the bolt is tightened, and the ratchet wrench is swung back and forth. In this case, the bolt is the position of the switching lever where only the ratchet wrench returns to the original position without rotating.

FIG. 2 shows the wrench of the second embodiment. The difference from the wrench of the first embodiment is that the switching lever 4 of the ratchet mechanism is engaged with the gear portion 6 of the input member 5 of the gear portion 2. The switching lever 4 of the ratchet mechanism is pressed by the ball 41 by the elastic force of the spring 42 and is pivotally supported on the main body by the gear shaft 7. Moreover, the operation part of the switching lever 4 protrudes from the space | gap part 43 of the both sides | surfaces of the gear part 2, and when the operation part of this switching lever 4 is pushed, a switching lever will rotate and it will switch a ratchet mechanism. It is something that can be done. The ratchet mechanism is similar to a known ratchet mechanism, and is similar to the ratchet mechanism of the conventional ratchet wrench 100.

  The operation method when the bolt 230 is tightened using the wrench 20 of the second embodiment is the same as that of the wrench 10 of the first embodiment. However, the switching lever 4 of the ratchet mechanism of the wrench 20 of the second embodiment is switched to the side on which the bolt 230 is tightened. Next, the operation of the wrench 20 of the second embodiment will be described with reference to FIG. When the conventional ratchet wrench 100 is swung in the direction of arrow e from the tightening start position, the bolt 230 is tightened via the wrench 20 of the second embodiment in the same manner as the wrench 10 of the first embodiment. Next, when the conventional ratchet wrench 100 is tightened and returned to the direction of the arrow f from the end position, the rotational force in the direction opposite to the direction of the arrow r is applied to the input member 5 of the wrench 20 of the second embodiment. However, since the wrench 20 of the second embodiment has a ratchet mechanism, the rotation of the wrench of the wrench of the second embodiment is prevented from rotating in the direction opposite to the direction of the arrow r by the action of the input member. 5 and the head member 11 and the bolt 230 do not rotate. However, the conventional ratchet wrench 100 returns to the tightening start position by the action of the ratchet mechanism of the conventional ratchet wrench 100.

  Since the wrench 20 of the second embodiment has a ratchet mechanism, the bolts are tightened by the action of the ratchet mechanism of the wrench 20 of the second embodiment at the time of the swing return operation of the conventional ratchet wrench 100. Even if there is almost no rotation resistance of the bolt and nut at the initial stage, the bolt does not loosen because the head member 11 is in a state where the rotation in the direction opposite to the direction of the arrow r is blocked.

  Moreover, since the wrench 20 of 2nd Embodiment has a ratchet mechanism, the wrench 20 of 2nd Embodiment can be used independently and bolting operation can be performed. The operation at the time of the tightening operation of the bolt 230 using the wrench 20 of the second embodiment alone will be described with reference to FIG. When the handle part 3 is tightened in the direction of arrow g from the tightening start position with the bolt 230 fitted to the socket 110, the switching lever 4 of the ratchet mechanism rotates the gear part 6 of the input member 5 in the direction of arrow r. Since the rotation in the direction opposite to that of the head member 11 is in a blocked state (the gear portion 12 of the head member 11 is also blocked through the gear train), the bolt 230 is tightened by the swing angle. Next, when the swing return operation is performed in the direction of the arrow h, the switching lever 4 of the ratchet mechanism can rotate with respect to the rotation of the gear portion 6 of the input member 5 in the direction of the arrow r. The gears 6, 6, 6 of the gear train meshing with the input member 5 rotate, and the terminal gear 6 of the gear train meshes with the gear portion 12 of the head member 11 and rotates. 11, the head member 11 and the bolt 230 remain stationary without rotating, and the wrench 20 of the second embodiment returns from the tightening end position to the tightening start end position. .

  FIG. 3 shows a wrench 30 of the third embodiment. The difference from the wrench 20 of the second embodiment is that the mounting means of the input member 5 with the conventional wrench is provided with hexagonal column bodies 52, 52 protruding from the square holes on the upper and lower surfaces. The conventional ratchet wrench socket can be attached to the hexagonal cylinders 52, 52 from the upper surface side and the lower surface side, and the fitting means to the bolt head (the wrench 20 of the second embodiment can be used for angular drive). A socket having a different size is fixed to the upper surface and the lower surface of the head member 11. The operation method and operation are the same as those of the wrench 20 of the second embodiment.

  FIG. 4 shows a wrench 40 of the fourth embodiment. The difference from the wrench 20 of the second embodiment is that the gear 64 fixed on the same axis 7 with the gear 63 meshing with the starting gear 65 of the gear train of the gear portion 2 is different from the gear 63 in terms of the number of teeth of the gear 64. The gear 61 that meshes with the gear 64 and is fixed on the same axis 7 as the terminal gear 62 is a fast-rotating gear mechanism (speed increasing gear mechanism) that is obtained by increasing the number of teeth of the gear 61 compared to the gear 62. It is a thing. By rotating the gear portion 2 quickly and using a gear mechanism, a large number of rotations can be given to the angular drive 15 of the head member 11 by a small swing operation of the conventional ratchet wrench, and the bolt can be tightened in a short time. It becomes. In addition, the structure of the gear of the gear part 2 is not limited to the said gear structure, What is necessary is just the rapid-rotation gear mechanism which has the said function.

  FIG. 5 shows a wrench 50 of the fifth embodiment. The difference with the wrench 40 of the fourth embodiment is that the gear 65 fixed coaxially with the starting gear 66 of the gear train of the gear portion 2 meshing with the gear portion 68 of the input member 5 is the tooth of the gear 65. The gear 64 having a smaller number than the gear 66 and fixed to the gear 7 and the gear 63 meshing with the gear 65 has a booster gear mechanism (reduction gear mechanism) obtained by reducing the number of teeth of the gear 64 than that of the gear 63. ). Since the gear portion 2 is a booster gear mechanism, a large rotational force can be applied to the angular drive 15 of the head member 11 by a small operating force of the conventional ratchet wrench. In addition, the structure of the gear of the gear part 2 is not limited to the said gear structure, What is necessary is just a booster gear mechanism which has the said function.

  FIG. 6 shows a wrench 60 of the sixth embodiment. The difference from the wrench 20 of the second embodiment is that the upper surface of each gear 81, 82, 83, 84, 85 of the gear train of the gear portion 2 (including the head portion of the wrench 20 of the second embodiment) and Socket parts 21, 22, 23, 24, 25, 26, 27, 28, 29, 31 for fitting to bolt heads of different sizes are provided on the lower surface from the gear part 2 (main body). is there.

  The operation method of the wrench 60 of the sixth embodiment is such that when the socket portion suitable for the wrench 60 of the sixth embodiment is fitted to the bolt head to be tightened and the handle portion 3 is swung, the bolt is tightened. Go. Note that the switching lever 4 of the ratchet mechanism is switched to the side where the bolt is tightened. The operation is the same as when the wrench 20 of the second embodiment is used alone. As described above, the wrench 60 of the sixth embodiment swings around the socket portion fitted to the bolt head, and the bolt is tightened.

  According to the wrench 60 of the sixth embodiment, it has only a wrench of the sixth embodiment by having a socket portion that can be fitted to 10 types of bolts protruding from the upper and lower surfaces of the main body. Multiple types of bolts can be tightened, making it unnecessary to prepare multiple types of wrench. Incidentally, the socket portion of the wrench 60 of the sixth embodiment is gradually reduced in size as it goes from the head portion toward the handle portion 3, and a large bolt can obtain a high torque by using the handle portion 3 for a long time. Therefore, the tightening torque can be reduced as the size of the bolt is reduced, so that the effective length of the handle portion 3 for tightening is sequentially reduced as the size of the socket is reduced. It will become.

  FIG. 7 shows a wrench 70 of the seventh embodiment. The difference from the wrench 60 of the sixth embodiment is that the intermediate gears 71, 71, 71, 71 are installed in the middle of the gears 81, 82, 83, 84, 85 of the gear train of the gear portion 2. Square holes 51 and 51 are provided on the lower surface of the upper surface of the main body in the gear portion 86 of the input member 5 that meshes with the starting gear 85 of the gear train. By installing the intermediate gears 71, 71, 71, 71, the rotation direction of the socket part (each of the upper surface side and the lower surface side of the main body) is unified in the same direction with respect to the swinging operation direction of the handle part 3, thereby causing erroneous operation. Can be prevented. Further, by attaching the conventional ratchet wrench 100 to the square holes 51 of the input member 5, the same effect as the wrench 20 of the second embodiment can be obtained.

  In the conventional ratchet wrench, the swing operation is performed around the head of the bolt. In the wrench of the present invention, the center of the swing operation is moved to the input member that is substantially the center of the wrench. In this case, the operation range of the wrench can be greatly expanded, so that the bolt can be tightened easily and in a short time.

  In addition, by providing socket portions of different sizes on the upper surface and lower surface of each gear of the gear portion, it becomes possible to tighten various types of bolts using only the wrench of the present invention. No need to carry.

In addition, although the ratchet mechanism of the wrench having the gear mechanism of the present invention shown in the embodiment has been described as a claw type switching mechanism, the ratchet mechanism is not limited to the claw type switching mechanism, but a pin type switching mechanism or other Any ratchet mechanism that functions as a wrench having the present gear mechanism may be used.

1 Head
2 Gear part
DESCRIPTION OF SYMBOLS 3 Handle part 4 Switching lever 5 Input member 6 Gear 11 Head member 12 Gear part 13, 14 Socket part 15 Square drive 10 Wrench which has the gear mechanism of 1st Embodiment 20 Wrench which has the gear mechanism of 2nd Embodiment 30 3rd Wrench having gear mechanism of embodiment 40 Wrench having gear mechanism of fourth embodiment 50 Wrench having gear mechanism of fifth embodiment 60 Wrench having gear mechanism of sixth embodiment 70 Gear mechanism of seventh embodiment Wrench 100 Conventional ratchet wrench 110 Socket part 230 Volts

In the present invention, when a bolt or nut is tightened or loosened with a wrench or the like, the swinging operation of the wrench or the like is an obstacle or a narrow operation space, so that the bolt or nut is tightened or loosened at a place where the operation is restricted. The present invention relates to a wrench that can be operated efficiently .

Originally, the ratchet wrench is an integral structure wrench in which a socket is incorporated in a wrench head part. However, in the ratchet wrench of the present invention, the socket fitting part of the wrench head part is formed by a square drive.

When the swinging operation of a handle such as a wrench or spanner is an obstacle or a narrow operation space, the wrench cannot swing over a wide range, so the bolt or nut tightening or loosening operation (hereinafter referred to as bolt tightening operation) is narrow. It was a wrench operation within the operation range, which required a lot of work and was inefficient.

In order to solve the above problems, the range of swinging operation of the wrench can be increased somewhat by shortening the handle such as a wrench, but the tightening operation of the bolt with a large torque can be achieved by shortening the handle. become unable.

  In the wrench of Patent Document 1, a square hole is formed in a handle portion shorter than usual of the ratchet wrench, and a square drive of a torque wrench is fitted into this square hole, and the ratchet wrench also swings in conjunction with the swing operation of the torque wrench. In addition, the bolt can be tightened even in a narrow operating range. Further, the wall surface of the square hole is set to 45 degrees with respect to the central axis of the handle of the ratchet wrench, thereby causing an angular difference of 45 degrees between the central axis of the ratchet wrench and the central axis of the torque wrench, It is intended to avoid the problem that the handle tail end of the torque wrench is in contact with the wall surface of the tightening site and difficult to rotate.

  However, in Patent Document 1, when the torque wrench is swung, the ratchet wrench of Patent Document 1 is swung at the same time. If each handle comes into contact with the wall surface of the tightening site, the swing operation cannot be performed. The operation range at is very narrow.

Japanese Utility Model Publication No. 07-014677

In view of the disadvantages of the prior art, the wrench of the present invention even when the swing operation of the wrench is difficult, if even fit into the socket bolts, is a wrench as a means of tightening operation of the bolt is possible .

A head part having a head member with a square drive projecting for mounting a socket fitted to a bolt head or a nut , and a gear part composed of a gear train composed of a plurality of gears are connected to the head part. Further, an operation handle is also connected to the gear portion, and a gear is engraved on the outer periphery of the head member from which the angular drive protrudes , and the end gear of the gear train meshes with the gear. The ratchet wrench has a square drive in the head member and a ratchet mechanism is engaged with a gear around the square drive, and a gear is also provided on the outer periphery of the input member having a square hole for mounting the square drive. There Yes and engraved, Ri our starting gear of the gear train to the gear in mesh, and further engage ratchet mechanism for regulating the gear rotation direction from the handle side to the outer periphery of the input member and said Gear composed of gear train The parts, which was characterized in that a transmission gear mechanism.

When tightening bolts, the wrench socket can be fitted to the bolt head in a narrow operating space, but the handle of the wrench abuts against the wall surface of the tightening site and the wrench cannot be swung sufficiently. Thus, even when the bolt cannot be tightened , the conventional ratchet wrench is attached to the square hole of the input member, and the bolt can be tightened by swinging the handle of the conventional ratchet wrench.

In the initial stage of tightening the bolt with the conventional ratchet wrench, if the swing return operation is performed when there is almost no rotation resistance of the bolt and nut, the conventional ratchet wrench ratchet mechanism does not work and the bolt for the swing return angle However, when a conventional ratchet wrench is attached to the wrench of the present invention and a bolt is tightened (oscillation return operation), the wrench ratchet mechanism of the present invention is used to perform the swing return operation. But the bolt will not loosen.

  Furthermore, by making the gear part a transmission gear mechanism, a booster gear mechanism (reduction gear mechanism) that can obtain a large output with a small input due to the gear ratio of the gear mechanism, or a large number of revolutions with a small handle swinging operation. It can be set as the obtained fast-rotating gear mechanism (speed-up gear mechanism).

Moreover, since the wrench of this invention has a ratchet mechanism, it can also be used independently without passing through the conventional ratchet wrench. The wrench of the present invention is a wrench having the gear mechanism of the present invention, and the conventional ratchet wrench has an angular drive in the head portion, and the ratchet mechanism is engaged with the gear around the angular drive. It is a ratchet wrench that is attached to the square hole of the input member of the wrench of the present invention to operate the wrench of the present invention.

It is the perspective view which shows the wrench which has the gear mechanism of 1st Embodiment, AA sectional drawing, and BB sectional drawing. It is the perspective view which shows the wrench which has the gear mechanism of 2nd Embodiment, AA sectional drawing, and BB sectional drawing. It is the perspective view which shows the wrench which has the gear mechanism of 3rd Embodiment, AA sectional drawing, and BB sectional drawing. It is a perspective view which shows the conventional ratchet wrench. It is the implementation figure which performs the bolting operation of the volt | bolt using the conventional ratchet wrench in the narrow operation space, and the front view of the conventional ratchet wrench. FIG. 5 is a view showing a wrench having the gear mechanism of the first embodiment and a bolt tightening operation by attaching the conventional ratchet wrench to the wrench having the gear mechanism of the first embodiment, and a wrench having the gear mechanism of the first embodiment. It is a front view which shows the state which mounted | wore the wrench. FIG. 5 is a diagram illustrating a tightening operation of a bolt by attaching a wrench having the gear mechanism of the first embodiment to a wrench having the gear mechanism of the first embodiment and further attaching a conventional ratchet wrench in a narrow operation space; and It is a front view which shows the state which mounted | wore the wrench which has the gear mechanism of 1st Embodiment with the wrench which has the gear mechanism of 1st Embodiment, and also mounted | worn with the conventional ratchet wrench. It is operation | movement explanatory drawing when attaching the conventional ratchet wrench to the wrench which has the gear mechanism of 1st Embodiment, and performing bolting operation of the conventional ratchet wrench. It is operation | movement explanatory drawing when bolt tightening operation is performed by the single wrench which has the gear mechanism of 1st Embodiment.

  Embodiments of the present invention will be described in detail with reference to the drawings. In addition, each AA sectional drawing is a cross-sectional view seen from the front (front side), and BB sectional drawing is a longitudinal sectional view seen from the upper surface. The positional relationship in the following description is described based on the positions shown in the drawings.

  The wrench having the gear mechanism of the first embodiment will be described in detail with reference to FIG. As shown in the figure, the head portion 1 is provided at the left end, the gear portion 2 is provided at the left end, and the handle portion 3 is provided at the right end, and the whole (main body) is formed of iron. A head member 11 on which a square drive 15 as a means for mounting a socket is protruded from the head portion 1 is rotatably mounted on the main body. A gear is formed on the outer peripheral surface of the head member 11. A gear body having a gear portion 12. The square drive 15 is a regular quadrangular columnar body projecting from the upper surface of the main body, and a ball 16 urged outward by a spring when a socket is mounted on one side is inserted to prevent the socket from falling off. .

The gear portion 2 is composed of a gear train and a gear portion 6 of an input member 5 to be described later. The gear train is composed of three gears 6, 6, 6. Each gear shaft 7, 7, 7 is Bearings 8, 8 and 8 are pivotally supported on the main body. The terminal gear 6 of the gear train is engaged with the gear portion 12 of the head member 11, and the start gear 6 of the gear train is a gear body having a gear engraved on the outer peripheral surface for obtaining input from the outside. The gear member 6 of the input member 5 having the square hole 51 is engaged. The input member 5 has a regular square hole 51 formed in the lower surface, and is rotatably mounted on the main body. A conventional ratchet wrench angular drive can be inserted into the square hole 51 from the lower surface side. Further, the switching lever 4 of the ratchet mechanism is engaged with the gear portion 6 of the input member 5 of the gear portion 2 from the handle 3 side, and the switching lever 4 of the ratchet mechanism is pressed by the ball 42 by the elastic force of the spring 43. It is pivotally supported on the main body by a support shaft 41 so as to be rotatable. Moreover, the operation part of the switching lever 4 protrudes from the space | gap part 44 of the both sides | surfaces of the gear part 2, and when the operation part of this switching lever 4 is pushed, a switching lever will rotate and it will switch a ratchet mechanism. It is something that can be done. The starting gear 6 of the gear train is a gear that meshes with the gear portion 6 of the input member 5, and the terminal gear 6 is a gear that meshes with the gear portion 12 of the head member 11.

  Further, the notches 9, 9, 9, and 9 formed in the side surface of the gear portion 2 are lubrication holes for maintaining lubrication of the gears 6, 6, 6 of the gear train and the gear portion 6 of the input member 5. It is also intended to reduce the weight. The notches 9, 9, 9, 9 are not particularly troublesome even if they are not installed on the mechanism.

Furthermore, the handle 3 is extended from the right side of the gear portion, and serves as a gripping portion when the wrench of the present invention is fixed and operated independently.

Next, the operation of the wrench having the gear mechanism of the first embodiment will be described. First, as shown in FIGS. 5A and 5B , when a conventional ratchet wrench 100 is used to tighten bolts 230 of the flange 220 of the pipe 210 in the piping pit 200 (narrow operation space), The socket 110 of the ratchet wrench 100 is fitted to the head of the bolt 230 and the handle 230 is swung to tighten the bolt 230. However, since the operation space is small, the swing operation range in the case of the conventional ratchet wrench 100 is as follows. In the case of another bolt, the ratchet wrench 100-1 is in a state where there is no swinging operation range at all by merely fitting the socket 110 to the head of the bolt 230. As described above, the bolt tightening operation in the narrow operation space by the conventional ratchet wrench is very difficult and takes time. It should be noted that when the bolt is tightened, the nut must naturally be fixed with a spanner or a wrench, but the nut is assumed to be fixed and the description is omitted. Normally, when a bolt or nut is tightened, the bolt is fixed and the nut is rotated and tightened, but in this description, the bolt is rotated and tightened. Hereinafter, the wrench having the gear mechanism of the first embodiment is referred to as the wrench of the first embodiment, and the same applies to the wrench of the second embodiment and thereafter.

The method for operating the wrench according to the first embodiment will be described in detail with reference to FIGS . In a state where the socket 110 is attached to the corner drive 15 of the wrench 20 of the first embodiment and the socket 110 is fitted to the head of the bolt 230, the corner hole 51 of the input member 5 of the wrench 20 of the first embodiment is inserted. The corner drive 15 of the conventional ratchet wrench 100 is mounted. At this time, it is assumed that the switching lever 4 of the ratchet mechanism of the conventional ratchet wrench 100 and the wrench 20 of the first embodiment is switched to the side where the bolt 230 is tightened. Swung range of wrench 20 in the first embodiment as seen from FIG. 6 is narrower reached similar conventional ratchet wrench 100 of FIG. 5, but attached to the square hole 51 of the input member 5 of the wrench 20 in the first embodiment The conventional ratchet wrench 100 can have a wide range (b) of swing operation range. When the bolt 230 is tightened, the conventional ratchet wrench 100 is swung while the handle 3 is fixed so that the wrench 20 of the first embodiment does not swing. Incidentally, wrench 20 of the first embodiment counter torque is generated by reaction with the conventional ratchet wrench 100 swung without fixing the wrench 20 of the first embodiment is rotated, the wrench 20 of the first embodiment The handle 3 is placed against an obstacle or the like, and the wrench 20 of the first embodiment is fixed. Even in the case of another bolt, the bolt tightening operation by the wrench 20-1 of the first embodiment and the conventional ratchet wrench 100-1 can be in a wide range (c) of swing operation range as described above. As described above, the bolt tightening operation (see FIG. 5 ) using only the conventional ratchet wrench is a swing operation of the ratchet wrench centered on the bolt, whereas the wrench of the first embodiment In the bolt tightening operation in combination with the conventional ratchet wrench, the center of the swing operation of the conventional ratchet wrench is moved from the bolt to the square hole 51 of the input member 5 of the wrench of the first embodiment, so that the narrowing operation is performed. The swing operation range can be expanded even in a space, and the bolt tightening operation can be performed easily and in a short time. The ratchet mechanism of the wrench of the present invention is the same as a known ratchet mechanism, and is the same as the ratchet mechanism of the conventional ratchet wrench 100.

The operation of the wrench 20 of the first embodiment will be described with reference to FIG. When the bolt is tightened, the socket 110 is attached to the corner drive 15 of the head member 11 of the wrench 20 of the first embodiment, and the socket 110 is fitted to the head of the bolt 230. Further, when the square drive 15 of the conventional ratchet wrench 100 is fitted in the square hole 51 of the input member 5, if the conventional ratchet wrench 100 is swung in the direction of arrow e from the tightening start position (note that the first The wrench 20 of the embodiment is assumed to be fixed.), The conventional ratchet wrench 100 and the corner drives 15 and 15 of the wrench 20 of the first form are switched to the side where the switching levers 4 and 4 are tightened with the bolts 230. Therefore, the angular drive 15 of the conventional ratchet wrench 100 rotates by the swing angle of the conventional ratchet wrench 100, and the input of the wrench 20 of the first embodiment is rotated by the rotation of the angular drive 15 of the conventional ratchet wrench 100. The member 5 also rotates in the arrow r direction. The gears 6, 6, 6 of the gear train of the gear portion 2 meshing with the gear portion 6 of the input member 5 also rotate, and the rotation of the gear train of the gear portion 2 is transmitted to the gear 12 of the head member 11, The head member 11 rotates in the arrow r direction. As the head member 11 rotates, the socket 110 also rotates, whereby the bolt 230 rotates in the direction of the arrow r and the bolt 230 is tightened.

Next, when the conventional ratchet wrench 100 is tightened and returned from the end position, the rotational force in the direction opposite to the direction of the arrow r is applied to the input member 5 of the wrench 20 of the first embodiment. However, since the wrench 20 of the first embodiment has a ratchet mechanism, the rotation of the wrench 20 of the first embodiment is prevented from rotating in the direction opposite to the direction of the arrow r by the action of the ratchet mechanism of the first embodiment. The member 5 and further the head member 11 and the bolt 230 do not rotate, but the conventional ratchet wrench 100 is returned to the tightening start position by the action of the ratchet mechanism of the conventional ratchet wrench 100.

As described above, by swinging the conventional ratchet wrench 100 around the input member 5 of the wrench 20 of the first embodiment, the bolt 230 is gradually moved via the wrench 20 of the first embodiment. It will be tightened. If the number of gears of the gear portion 2 is an odd number (three in the wrench 20 of the first embodiment), the rotation direction of the input member 5 and the rotation direction of the head member 11 are the same, resulting in an erroneous operation. Leads to prevention.

Incidentally, the swing operation range of the wrench when tightening the bolt, starting clamping position the first position of the wrench in tightening operation, terminating the clamping position to begin swinging return operation to start the clamping position the clamping operation after wrench position and Describe. Also, when the ratchet wrench is switched to the side where the bolt of the ratchet mechanism is tightened, when the ratchet wrench is swung, the ratchet wrench rotates in the direction that the bolt is tightened, and the ratchet wrench is swung back and forth. In this case, the bolt is the position of the switching lever where only the ratchet wrench returns to the original position without rotating.

Since the conventional ratchet wrench 100 and the wrench 20 of the first embodiment have the ratchet mechanism, the operation of the ratchet mechanism of the wrench 20 of the first embodiment at the time of the swing return operation of the conventional ratchet wrench 100, Even when there is almost no rotation resistance between the bolt and the nut at the initial stage when the bolt is tightened, the head member 11 is in a state of being prevented from rotating in the direction opposite to the direction indicated by the arrow r, so that the bolt does not loosen.

Further, since the wrench 20 of the first embodiment has a ratchet mechanism, the wrench 20 of the first embodiment can be used alone and a bolt tightening operation can be performed. The operation at the time of tightening the bolt 230 using the wrench 20 of the first embodiment alone will be described with reference to FIG. Note that the switching lever 4 of the ratchet mechanism of the wrench 20 of the first embodiment is switched to the side on which the bolt 230 is tightened. When the handle 230 is tightened in the arrow g direction from the tightening start position with the bolt 230 fitted to the socket 110, the switching lever 4 of the ratchet mechanism rotates the gear portion 6 of the input member 5 in the direction of the arrow r. Is in a blocking state against rotation in the reverse direction (the gear portion 12 of the head member 11 is also blocked through the gear train), so that the bolt 230 is tightened by the swing angle. Next, when the swing return operation is performed in the direction of the arrow h, the switching lever 4 of the ratchet mechanism can rotate with respect to the rotation of the gear portion 6 of the input member 5 in the direction of the arrow r. The gears 6, 6, 6 of the gear train meshing with the input member 5 rotate, and the terminal gear 6 of the gear train meshes with the gear portion 12 of the head member 11 and rotates. 11, the head member 11 and the bolt 230 remain stationary without rotating, and the wrench 20 of the first embodiment returns from the tightening end position to the tightening start position. .

FIG. 2 shows a wrench 40 of the second embodiment . The difference from the wrench 20 of the first embodiment is that the gear 64 fixed on the same axis 7 as the gear 63 meshing with the starting gear 65 of the gear train of the gear portion 2 is different from the gear 63 in terms of the number of teeth of the gear 64. The gear 61 that meshes with the gear 64 and is fixed on the same axis 7 as the terminal gear 62 is a fast-rotating gear mechanism (speed increasing gear mechanism) that is obtained by increasing the number of teeth of the gear 61 compared to the gear 62. It is a thing. By rotating the gear portion 2 quickly and using a gear mechanism, a large number of rotations can be given to the angular drive 15 of the head member 11 by a small swing operation of the conventional ratchet wrench, and the bolt can be tightened in a short time. It becomes. In addition, the structure of the gear of the gear part 2 is not limited to the said gear structure, What is necessary is just the rapid-rotation gear mechanism which has the said function.

FIG. 3 shows a wrench 50 according to the third embodiment . The difference from the wrench 40 of the second embodiment is that the gear 65 fixed coaxially with the starting gear 66 of the gear train of the gear portion 2 meshing with the gear portion 68 of the input member 5 is the tooth of the gear 65. The gear 64 having a smaller number than the gear 66 and fixed to the gear 7 and the gear 63 meshing with the gear 65 has a booster gear mechanism (reduction gear mechanism) obtained by reducing the number of teeth of the gear 64 than that of the gear 63. ). Since the gear portion 2 is a booster gear mechanism, a large rotational force can be applied to the angular drive 15 of the head member 11 by a small operating force of the conventional ratchet wrench. In addition, the structure of the gear of the gear part 2 is not limited to the said gear structure, What is necessary is just a booster gear mechanism which has the said function.

  In the conventional ratchet wrench, the swing operation is performed around the head of the bolt. In the wrench of the present invention, the center of the swing operation is moved to the input member that is substantially the center of the wrench. In this case, the operation range of the wrench can be greatly expanded, so that the bolt can be tightened easily and in a short time.

In addition, although the ratchet mechanism of the wrench having the gear mechanism of the present invention shown in the embodiment has been described as a claw type switching mechanism, the ratchet mechanism is not limited to the claw type switching mechanism, but a pin type switching mechanism or other Any ratchet mechanism that functions as a wrench having the present gear mechanism may be used.

1 Head
2 Gear part
3 Handle 4 Switching lever 5 Input member 6 Gear 11 Head member 12 Gear portion 13, Socket 15 Square drive 20 Wrench having gear mechanism of the first embodiment 40 Wrench having gear mechanism of the second embodiment 50 Third embodiment Wrench with gear mechanism 100 Conventional ratchet wrench 110 Socket 230 Bolt

Further, as shown in FIG. 7, the socket 110 is attached to the corner drive 15 of the wrench 20 of the first embodiment (the wrench 20 of the first first embodiment), and the socket 110 is fitted to the head of the bolt 230. In this state, the wrench 20 of the first embodiment (the wrench of the second first embodiment) is inserted into the square hole 51 of the input member 5 of the wrench 20 of the first embodiment (the wrench 20 of the first first embodiment). 20), and the angular drive 15 of the conventional ratchet wrench 100 is installed in the square hole 51 of the wrench 20 of the first embodiment (the wrench 20 of the second first embodiment). At this time, it is assumed that the switching lever 4 of the ratchet mechanism of each ratchet wrench is switched to the side where the bolt 230 is tightened. As can be seen from FIG. 7, the swing of the wrench 20 of the first embodiment (the wrench 20 of the first first embodiment) and the wrench 20 of the first embodiment (the wrench 20 of the second first embodiment). Although the operation range is extremely narrow, the conventional ratchet wrench 100 attached to the wrench 20 of the first embodiment (the wrench 20 of the second first embodiment) can have a wide range (d) of swing operation range. . As described above, even when the tightening operation is difficult only by connecting the wrench 20 of the first embodiment and the conventional ratchet wrench 100, the two wrench 20 of the first embodiment and the conventional ratchet wrench 100 are connected. Thus, even when the tightening operation is extremely difficult due to a narrow operation range or an obstacle, the tightening operation is facilitated. As described above with reference to FIG. 5, in the conventional ratchet wrench 100, the swing operation centered on the bolt 230 is used, and if the wrench of the present invention is used as shown in FIGS. By swinging the conventional ratchet wrench 100 about the input member 5 of the wrench 20 of the embodiment, the center of the swing operation is moved to the square hole 51 which is the substantially central portion of the wrench 20 of the first embodiment. The operation range can be greatly expanded even in a narrow operation space. As described above, by swinging the conventional ratchet wrench 100 around the input member 5 of the wrench 20 of the first embodiment (which may be two wrench 20 of the first embodiment) , the first The bolt 230 is gradually tightened via the wrench 20 of one embodiment. If the number of gears of the gear portion 2 is an odd number (three in the wrench 20 of the first embodiment), the rotation direction of the input member 5 and the rotation direction of the head member 11 are the same, resulting in an erroneous operation. Leads to prevention.

Claims (4)

  A head part having a socket part for fitting a bolt head or a nut, or a head part having means for attaching a socket for fitting a bolt head or a nut, and a gear train comprising a plurality of gears A gear part constituted by is connected to the head part, and an operation handle is also connected to the gear part, for mounting a socket part or a socket for fitting a bolt head or a nut. A gear is engraved on the outer periphery of the means, a terminal gear of the gear train is engaged with the gear, and a gear is also engraved on the outer periphery of the input means for obtaining input from the outside. A wrench having a gear mechanism, wherein a gear at a starting end of a gear train is engaged with a gear.   2. A ratchet mechanism for restricting the rotational direction is engaged with a gear carved on an outer periphery of an input means meshing with a starting gear composed of a gear train composed of a plurality of gears. A wrench having the gear mechanism described in 1.   The wrench having a gear mechanism according to claim 1 or 2, wherein a gear portion composed of a gear train composed of a plurality of gears is a transmission gear mechanism.   3. A gear mechanism according to claim 2, wherein a socket portion for fitting a bolt head or a nut is installed in a plurality of appropriate gears of a gear portion constituted by a gear train composed of a plurality of gears. Having a wrench.