TWM471338U - Fastening safety structure of pipe wrench - Google Patents

Description

Pipe wrench tightening safety structure

This creation is to provide a tightening safety structure for pipe wrenches, mainly applied to the tightening and safety technology of pipe wrenches.

Pressing tools commonly used for water pipes or water pipe joints, usually by water pipe clamps for water pipes or water pipe joints. Since water pipes have different pipe diameters, the water pipe clamps must also be capable of operating their jaws. The pipe clamp is conventionally composed of a first tong body and a second tong body which are pivoted together, and a spring-coupled toothed piece is pivoted inside the first tong body. And a blocking piece and a positioning block are respectively disposed on the inner side of the first caliper body and the second caliper body, wherein the blocking teeth of the blocking piece and the teeth of the toothed piece are ratchet-shaped with each other, and the tooth shape is formed The sheet is unidirectionally reversed toward the fixed portion.

However, the above-mentioned conventional water pipe clamp can not only clamp the pipe fitting tightly, but also does not install a safety switch when the actual operation is applied, so that the first caliper body and the second caliper body cannot be ensured during the process of clamping the pipe fitting. Will retreat, there are security concerns in operation, and there are problems and shortcomings that need to be overcome.

The creator is currently engaged in the manufacture and design of related products, accumulated many years of practical experience and experience, and has actively invested in the spirit of innovation and improvement in response to the existing problems and defects of traditional pipe wrenches. .

The technical means applied by the novel problem solving and the effect of the prior art are as follows: the body is provided with a flat portion and an fixed caliper in an L-shaped configuration, and the flat portion can be provided with a movable caliper body. The moving movable caliper body and the fixed caliper body jointly clamp a pipe member, and the other end of the body is pivotally provided with a driving handle that can be up and down. The straight portion of the body is provided with a body at the rear of the movable caliper body. The base body is provided with a through hole parallel to the straight portion, the through hole is configured to pass a driving rack, and the driving rack is pivoted integrally with the movable caliper body, and the driving handle bottom corresponds to the driving rack There is a torsion spring and a dialing member, the dialing member is provided with a dialing portion, and the driving rack is provided with a plurality of anti-stop teeth; the driving handle can be pulled by the dialing portion only by pulling the driving handle The anti-stop tooth on the strip advances the movable caliper body and clamps the pipe clamp tightly; at the same time, a safety switch is arranged on the seat body, and a compression spring is arranged between the seat body and the safety switch, and the two sides of the safety switch correspond to There are two slots at the through hole of the seat body. The safety spring is ejected by the compression spring, and a unidirectional clamping action is formed on the reverse tooth on the driving rack by the slot on both sides, so that the driving rack cannot be retracted backward, and the movable caliper is prevented from being clamped. The process of retreat, to ensure the safety of the operator, with an increase in efficiency, to achieve its main purpose.

10‧‧‧ Ontology

11‧‧‧ Straight

12‧‧‧Fixed caliper body

13‧‧‧Arc Department

14‧‧‧ teeth

15‧‧‧ 枢 ear

16‧‧‧ pivot hole

17‧‧‧

18‧‧‧through holes

19‧‧‧Deep

20‧‧‧Active Pliers

21‧‧‧Chute

22‧‧‧ Cover

23‧‧‧颚

24‧‧‧ teeth

25‧‧‧ pivoting slot

26‧‧‧ pivot hole

30‧‧‧ drive rack

31‧‧‧ pivot hole

32‧‧‧Reverse stop teeth

40‧‧‧Drive handle

41‧‧‧First pivot hole

42‧‧‧Second pivot hole

43‧‧‧WD parts

44‧‧‧ pivot hole

45‧‧‧Driving Department

46‧‧‧Hook

47‧‧‧ head end angle

50‧‧‧Safety switch

51‧‧‧ slots

52‧‧‧Deep

60‧‧‧ body

61‧‧‧ Straight

62‧‧‧ pivot hole

63‧‧‧Fixed caliper body

64‧‧‧Arc Department

65‧‧‧ teeth

66‧‧‧ 枢 ear

67‧‧‧ pivot hole

70‧‧‧Active seat

71‧‧‧First through hole

72‧‧‧ screw holes

73‧‧‧Second through hole

80‧‧‧Active Pliers

81‧‧‧Chute

82‧‧‧ cover

83‧‧‧颚

84‧‧‧ teeth

85‧‧‧ pivot slot

86‧‧‧ pivot hole

90‧‧‧ drive rack

91‧‧‧ pivot hole

92‧‧‧Reverse stop teeth

100‧‧‧Drive handle

101‧‧‧First pivot hole

102‧‧‧Second pivot hole

103‧‧‧Spring slot

104‧‧‧One-way card software

105‧‧‧ card ratchet

105'‧‧‧ card ratchet

106‧‧‧Positioning flange

B‧‧‧ steel balls

S1‧‧‧Torque Spring

S2‧‧‧ compression spring

S3‧‧ spring

Q1‧‧‧First pivoting component

Q2‧‧‧Second pivoting component

Q3‧‧‧The third pivoting component

Q4‧‧‧Fourth pivoting component

P‧‧‧ screws

R‧‧‧ positioning tips

The first figure is a three-dimensional combination diagram of the first embodiment of the present invention.

The second figure is a perspective exploded view of the first embodiment of the present invention.

The third figure is a schematic diagram of the sectional combination of the first embodiment of the present invention.

The fourth figure is a schematic diagram of the action of the present embodiment in which the movable caliper body is retracted.

Fig. 5 is a schematic view showing the action of pushing the movable caliper body forward in the first embodiment of the present invention.

Fig. 6 is a schematic view showing the action of pulling the driving handle downward in the first embodiment of the present invention.

The seventh figure is a schematic diagram of the action of the driving member in the first embodiment of the present invention.

The eighth figure is a schematic diagram of the action of pulling the driving handle upward in the first embodiment of the present invention.

The ninth figure is a schematic diagram of the action of locking the safety switch in the first embodiment of the present invention.

The tenth figure is a three-dimensional combination diagram of the second embodiment of the present creation.

Figure 11 is a perspective exploded view of the second embodiment of the present invention.

Twelfth figure: A schematic diagram of the sectional combination of the second embodiment of the present invention.

Thirteenth figure: A schematic diagram of the action of pulling the driving handle upward in the second embodiment of the present invention.

Figure 14 is a schematic diagram of the action of the second embodiment of the present invention when the driving handle is pulled up to a fixed point.

The fifteenth figure is a schematic diagram of the action of pulling the driving handle downward in the second embodiment of the present invention.

Fig. 16 is a schematic view showing the action of retreating the movable caliper body in the second embodiment of the present invention.

Figure 17 is a schematic diagram of the action of adjusting the movable seat in the second embodiment of the present invention.

In order to make it easier for those who are familiar with the art to understand the content of the device and the functional benefits that can be achieved, two specific examples are listed, and the detailed descriptions are as follows:

A pipe clamp pressing and securing structure, please refer to the first and second figures: a schematic diagram of the three-dimensional combination and three-dimensional decomposition of the first embodiment of the present invention. As shown in the third figure, it is a schematic diagram of the sectional combination of the first embodiment of the present invention. The main body 10 is: a body 10, a movable caliper 20, a driving rack 30, a driving handle 40 and a safety switch 50; wherein: the body 10 is provided with a flat portion 11, the straight portion A movable caliper body 20 is disposed on the body 10, and a fixed caliper body 12 is vertically extended from one end of the straight portion 11. The inner side of the fixed caliper body 12 is provided with a circular arc portion 13 A tubular member 1 is disposed, and the circular arc portion 13 is provided with a plurality of teeth portions 14 as a bite for increasing the clamping of the tubular member 1 For the purpose of the force, the body 10 is provided with a pivot 15 at the other end of the straight portion 11. The pivot 15 is provided with a pivot hole 16 for pivoting the first pivoting element Q1. The handle 40, the flat portion 11 of the body 10 is provided with a body 17 near the pivot 16 , and the base 17 is provided with a through hole 18 parallel to the straight portion 11 , the through hole 18 is provided for wearing a Driving the rack 30, the outer side of the seat body 17 is perpendicular to the through hole 18, and a recess 19 is provided. The recess 19 can be used for receiving a top end of a compression spring S2; the movable caliper 20 corresponds to A sliding slot 21 and a cover 22 are disposed on the flat portion 11 of the body 10. The sliding slot 21 can be received in the flat portion 11 of the body 10 and locked by the screw P on the sliding slot 21. A cover plate 22 is provided for sliding displacement of the movable caliper body 20 on the flat portion 11 by the sliding groove 21. The movable caliper body 20 is provided with a crotch portion 23 corresponding to the fixed caliper body 12 of the body 10. A plurality of tooth portions 24 are disposed on the inner side of the portion 23 for increasing the bite force when the pipe member 1 is clamped. The movable jaw body 20 is provided with a pivoting groove 2 corresponding to the seat body 17 of the body 10. 5, the pivoting slot 25 is provided with a pivoting hole 26, the pivoting hole 26 can be pivotally provided with a driving rack 30 for the third pivoting component Q3, so that the movable caliper 20 can be driven by the driving rack 30 And tightening the pipe member 1; one end of the driving rack 30 passes through the through hole 18 of the base body 17 of the body 10, and is inserted into the pivoting groove 25 of the movable caliper body 20, and the driving rack 30 One end is provided with a pivoting hole 31 for the third pivoting element Q3 to pass through and the driving rack 30 is pivoted into the pivoting hole 26 of the movable caliper 20, the driving rack 30 corresponding to A row of a plurality of backstop teeth 32 is disposed at the driving handle 40; one end of the driving handle 40 is provided with a first pivoting hole 41, and the first pivoting hole 41 is pivotally disposed on the first pivoting component Q1. The pivoting hole of the pivot 15 of the body 10 In the 16th, when the driving handle 40 is pulled, the first pivoting member Q1 is centered, and swings back and forth at an appropriate angle, and the driving handle 40 is used to correspond to the driving under the first pivoting hole 41. A second pivoting hole 42 is disposed at the rack 30. The second pivoting hole 42 is configured to pivotally provide a dialing member 43 to the second pivoting component Q2. The upper end of the dialing member 43 is provided with a pivoting hole 44. The toggle member 43 is provided with a torsion spring S1 at the second pivoting member Q2. The torsion spring S1 provides an elastic force for the forward movement of the dial member 43. The dial member 43 corresponds to the inverse of the driving rack 30. A latching portion 45 is disposed at the retaining tooth 32. The latching portion 45 is used to pluck the plurality of reverse teeth 32 on the driving rack 30. The other end of the dialing member 43 is provided with a hook portion 46 for hooking The safety switch 50 is a ㄩ-shaped body, and the opening is sized to include the seat body 17 of the body 10. The two sides of the safety switch 50 correspond to the through holes of the seat body 17. There are two slots 51 at 18, and a recess 52 is provided in the middle of the bottom of the safety switch 50. The recess 52 can be used for another compression spring S2. The foot is provided with a topping force, and the safety switch 50 is ejected by the elastic force of the compression spring S2, and the backstop teeth 32 on the driving rack 30 are unidirectionally locked by the slots 51 on both sides. So that the drive rack 30 cannot be retracted backwards.

The present invention, which is a combination of the above various components, provides a pipe clamp pressing safety structure, in practical application:

Please refer to the fourth figure: a schematic diagram of the action of the movable caliper in the first embodiment of the present invention. First, the driving handle 40 is cocked upward, and the safety switch 50 is pressed, so that the movable caliper body 20 and the driving rack 30 can be displaced backward and retracted, and then the pipe member 1 is placed on the circular arc portion 13 of the fixed caliper body 12. .

Please refer to the fifth figure: a schematic diagram of the action of propelling the movable caliper body in the first embodiment of the present invention. The movable caliper body 20 and the drive rack 30 are displaced forward, so that the crotch portion 23 of the movable caliper body 20 can clamp the pipe member 1.

Please refer to the sixth figure: a schematic diagram of the action of pulling the driving handle downward in the first embodiment of the present invention. As shown in the seventh figure, it is a schematic diagram of the action of the driving member in the first embodiment of the present invention. And the eighth figure is a schematic diagram of the action of pulling the driving handle upward in the first embodiment of the present invention. The driving handle 40 is continuously pulled downward and upwardly, and the plurality of reverse teeth 32 on the driving rack 30 are pushed by the dialing portion 45 of the dialing member 43 to advance the movable caliper body by one tooth and one tooth. 20, the tube member 1 is tightly clamped by the plurality of tooth portions 14, 24 on the crotch portion 23 by the arc portion 13.

Please refer to the ninth figure: a schematic diagram of the action of the safety switch locking in the first embodiment of the present invention. Finally, the safety switch 50 is released, and the safety switch 50 is ejected by the elastic force of the compression spring S2, and the unidirectional locking effect is formed on the reverse tooth 32 on the driving rack 30 by the slots 51 on both sides. The movable caliper body 20 is prevented from loosening during the process of clamping the pipe member 1, thereby ensuring the safety of the operator.

A pipe clamp pressing and securing structure, please refer to the tenth and eleventh drawings: a three-dimensional combination and a three-dimensional exploded view of the second embodiment of the present invention. And the twelfth figure is a schematic diagram of the sectional combination of the second embodiment of the present invention. The main body is: a body 60, a movable base 70, a movable caliper 80, a driving rack 90, a driving handle 100 and a driving gear G; wherein: the body 60 is provided with a flat portion 61. The straight portion 61 can be provided with a movable caliper body 70. The body 60 is provided with a pivot hole 62 at one end of the straight portion 61. The pivot hole is provided. A fixing caliper 63 is disposed on the fourth pivoting member Q4, and a circular arc portion 64 is disposed on the inner side of the fixed caliper 63. The circular arc portion 64 is configured to receive a tubular member 1, and the circular arc portion 64 is provided. There are a plurality of teeth 65 for increasing the bite force when the tube member 1 is clamped. The body 60 is provided with a pivoting arm 66 at the other end of the flat portion 61. The pivoting leg 66 is provided with a pivoting hole 67. The pivoting hole 67 is provided with a driving handle 100 and a driving gear G for the first pivoting element Q1. The flat portion 61 of the body 60 is provided with a movable seat 70 near the pivot 66; the movable seat The first through hole 71 is disposed at the flat portion 61 of the body 60, and the first through hole 71 is disposed through the flat portion 61 of the body 60, so that the movable seat 70 can utilize the first portion. The through hole 71 is slidably displaced on the flat portion 61. The outer side of the movable base 70 is perpendicular to the first through hole 71, and a screw hole 72 is provided. The screw hole 72 can be fastened to the flat body of the body 60 by the screw P. The straight portion 61 is used for fixing the movable base 70. The movable base 70 is provided with a second through hole 73 corresponding to the driving rack 90, and the second through hole 73 is provided for wearing a second through hole 73. The movable shank 90 is provided with a sliding slot 81 and a cover 82 corresponding to the flat portion 61 of the body 60. The sliding slot 81 can be received in the flat portion 61 of the body 60. A locking plate 82 is locked on the sliding slot 81 by the screw P, so that the movable caliper 80 can be slidably displaced on the flat portion 81 by the sliding slot 81. The movable caliper 80 corresponds to the fixing of the body 60. A shank portion 83 is disposed at the tong body 63. The inside of the shank portion 83 is provided with a plurality of teeth portions 84 for increasing the nip force when the pipe member 1 is clamped. The movable caliper body 80 is corresponding to the driving rack 90. There is a pivoting groove 85. The pivoting groove 85 is provided with a pivoting hole 86. The pivoting hole 86 can be pivoted to the third pivoting component Q3 to provide a driving rack 90, so that the movable caliper 80 can be driven by the driving tooth. Pressing the pipe 1 with the advancement of the strip 90; One end of the driving rack 90 passes through the second through hole 73 of the movable base 70 and is inserted into the pivoting groove 85 of the movable caliper 80. The driving rack 90 has a pivot hole at one end thereof. 91. The pivoting hole 91 is configured to pass through the third pivoting component Q3 and pivot the driving rack 90 into the pivoting hole 86 of the movable caliper 80. The driving rack 90 corresponds to the driving handle 100. There is a whole row of a plurality of reverse teeth 92; one end of the driving handle 100 is provided with a first pivot hole 101, and the first pivot hole 101 is pivotally disposed on the body of the body 60. In the pivoting hole 67 of the 66 and a driving gear G, when the driving handle 90 is pulled, the first pivoting element Q1 is centered, and swings back and forth at an appropriate angle, and the driving handle 100 is used first. A second pivot hole 102 and a spring slot 103 are disposed at a lower portion of the pivot hole 101. The second pivot hole 102 is configured to pivotally connect the second pivoting member Q2 to a one-way latching member 104. 103 is provided with a spring S3 and a steel ball B. The one-way latching member 104 is provided with two latching ratchets 105, 105' corresponding to the driving gear G. The element 104 is provided with a positioning flange 106 corresponding to the steel ball B, and the unidirectional clamping member 104 is pushed forward or backward so that the steel ball B can be positioned to the right or the left side of the positioning flange 106, so that one of the cards The ratchet teeth 105 form a forward latching state for the driving gear G, or another latching ratchet teeth 105' form a reverse latching state for the driving gear G, and the driving gear G is used to pluck the driving rack 90 The plurality of counterstops 92 advance or push forward.

The present invention, which is a combination of the above various components, provides a pipe clamp pressing safety structure, in practical application:

Please refer to the thirteenth figure: a schematic diagram of the action of pulling the driving handle upward in the second embodiment of the present invention. And the fourteenth figure: the second embodiment of the present creative driving handle The action diagram to the fixed point. First, the one-way latching member 104 is pushed backward, and then the driving handle 100 is cocked upward, so that the latching ratchet teeth 105 form a positive one-way latching state in which the driving gear G has a positive action and a reverse effect.

Please refer to the fifteenth figure, which is a schematic diagram of the action of pulling the driving handle downward in the second embodiment of the present invention. Then, the driving handle 100 is continuously pulled downward and upward, and the driving gear G is pulled by the click ratchet 105, and then the driving gear G is rotated to drive the plurality of reverse teeth 92 on the rack 90, one tooth and one tooth. The movable caliper 80 is advanced forward, and the tubular member 1 is tightly clamped by the circular arc portion 64 and the plurality of teeth 65, 84 on the crotch portion 83.

Please refer to the sixteenth figure: it is a schematic diagram of the action of retreating the movable caliper body in the second embodiment of the present invention. The user only needs to move the one-way latching member 104 forward, so that the latching ratchet teeth 105' form a reverse-acting, positively-inactive one-way latching state for the driving gear G, and then continuously downwardly When the driving handle 100 is pulled upward, the driving gear G can be pushed by the locking ratchet 105', and then the driving gear G is rotated to drive the plurality of reverse teeth 92 on the rack 90, and one tooth and one tooth are retracted. The caliper body 80 quickly releases the tube member 1.

Please refer to the seventeenth figure: the action diagram of adjusting the movable seat body in the second embodiment of the present invention. The user only needs to loosen the screw P, that is, the position of the movable seat 80 at the straight portion 61 of the body 60 can be quickly adjusted.

Based on the above, the creation department provides a tightening safety structure for the pipe wrench. After the actual production of the creator and the repeated operation test, it is confirmed that the functional benefits expected by the creation can be achieved, and at the same time, there is no The "first creation" of the news has the "utility value of the industry". It has already met the requirements of the establishment of the "patentability" and "progressiveness" of the new patents, and has filed a new patent application with the bureau in accordance with the provisions of the Patent Law.

10‧‧‧ Ontology

11‧‧‧ Straight

12‧‧‧Fixed caliper body

13‧‧‧Arc Department

14‧‧‧ teeth

15‧‧‧ 枢 ear

16‧‧‧ pivot hole

17‧‧‧

18‧‧‧through holes

19‧‧‧Deep

20‧‧‧Active Pliers

21‧‧‧Chute

22‧‧‧ Cover

23‧‧‧颚

24‧‧‧ teeth

25‧‧‧ pivoting slot

26‧‧‧ pivot hole

30‧‧‧ drive rack

31‧‧‧ pivot hole

32‧‧‧Reverse stop teeth

40‧‧‧Drive handle

41‧‧‧First pivot hole

42‧‧‧Second pivot hole

43‧‧‧WD parts

44‧‧‧ pivot hole

45‧‧‧Driving Department

46‧‧‧Hook

47‧‧‧ head end angle

50‧‧‧Safety switch

51‧‧‧ slots

52‧‧‧Deep

S1‧‧‧Torque Spring

S2‧‧‧ compression spring

Q1‧‧‧First pivoting component

Q2‧‧‧Second pivoting component

Q3‧‧‧The third pivoting component

P‧‧‧ screws

R‧‧‧ positioning tips

Claims (4)

A pipe wrench pressing safety structure comprises: a body, a movable caliper body, a driving rack, a driving handle and a safety switch; wherein: the body is provided with a flat portion, and the flat portion is provided with a a movable caliper body, the body is provided with a fixing tong body at one end of the straight portion, and the body is provided with a pivoting ear at the other end of the straight portion, the pivoting ear is provided with a pivoting hole, and the pivoting hole is configured for pivoting a driving handle, the flat portion of the body is provided with a body near the pivot ear, the base body is provided with a through hole parallel to the straight portion, the through hole is configured to wear a driving rack, the seat body The outer portion is provided with a safety switch, and the base body is provided with a concave hole perpendicular to the through hole, and the concave hole can be used for receiving the top end of one of the compression springs; the movable clamp body corresponds to the straight portion of the body There is a sliding slot and a cover plate, and the sliding slot can be accommodated in the straight portion of the body, and a sliding cover is arranged on the sliding slot, so that the movable clamping body can utilize the sliding slot in the straight portion Up sliding displacement, the movable caliper body is provided at a fixed tong body corresponding to the body a pivoting groove corresponding to the body of the body, the pivoting slot is provided with a pivoting hole, the pivoting hole is configured to pivotally provide a driving rack, so that the movable caliper can The tubular member is forced by the driving of the driving rack; one end of the driving rack passes through the through hole of the body of the main body, and is inserted into the pivoting groove of the movable caliper body, and one end of the driving rack is disposed There is a pivoting hole, the pivoting hole is pivotally connected to the pivoting hole of the movable caliper body, thereby pivoting the driving rack and the movable caliper body integrally, and the driving rack is provided with a whole row of multiple inverses a stop shaft; a first pivot hole is disposed at one end of the driving handle, and the first pivot hole is pivotally disposed in a pivot hole of the pivot pin of the body, so that the driving handle can be Swing back and forth at an appropriate angle while using the head end angle of the drive handle to limit the maximum swing angle, the drive handle a second pivoting hole is disposed at the bottom of the first pivoting hole corresponding to the driving rack, and the second pivoting hole is configured to pivotally provide a dialing member and a torsion spring, and the torsion spring swings backward The dialing member has a dialing portion at a lower end thereof, and the dialing portion is configured to move a plurality of reverse stopping teeth on the driving rack, and the other end of the dialing member is provided with a hook portion, thereby hooking The safety switch is disposed on the positioning end of the driving handle; the safety switch is formed in the shape of the body, and the opening is just sized to include the seat body of the body, and two sides of the safety switch are provided with two slots corresponding to the through hole of the seat body. a recess is provided in the middle of the bottom of the safety switch, and the recess can be used for the other end of the compression spring to receive the topping. The elastic force of the compression spring is used to eject the safety switch, and the two sides are The slot forms a one-way clamping action on the reverse stop teeth on the drive rack, so that the drive rack cannot be retracted backwards. A pipe clamp pressing safety structure comprises: a body, a movable seat body, a movable caliper body, a driving rack, a driving handle and a driving gear; wherein: the body is provided with a flat portion, the flat portion A movable caliper body is disposed, the body is provided with a fixing tong body at one end of the straight portion, and the body is provided with a pivoting ear at the other end of the straight portion, the pivoting ear is provided with a pivoting hole, the pivoting hole A driving handle and a driving gear are disposed for pivoting, and a flat portion of the body is provided with a movable seat near the pivot; the movable seat is provided with a first through hole corresponding to the straight portion of the body. The first through hole can be disposed in the flat portion of the body, so that the movable seat can be slidably displaced on the flat portion by using the first through hole, and the outer side of the movable seat is perpendicular to the first through hole a screw hole is provided for the screw to be fastened to the flat portion of the body, and the movable seat body is provided with a second through hole corresponding to the driving rack, and the second through hole is configured to pass a driving tooth a movable jaw corresponding to the flat portion of the body provided with a slip And a cover, the chute The movable caliper body can be slidably displaced on the straight portion by the sliding groove, and the movable caliper body corresponds to the body The fixed caliper body is provided with a shank corresponding to the driving rack, and a pivoting slot is provided. The pivoting slot is provided with a pivoting hole, and the pivoting hole is configured to pivotally provide a driving rack. The movable caliper body can be urged by the driving rack to press the pipe member; one end of the driving rack passes through the second through hole of the movable seat body, and is inserted into the pivoting groove of the movable caliper body, One end of the driving rack is provided with a pivoting hole, and the pivoting hole is pivotally connected to the pivoting hole of the movable caliper body, and the driving rack is provided with a whole row of a plurality of backstop teeth corresponding to the driving handle; One end of the driving handle is provided with a first pivoting hole, and the first pivoting hole is configured to pivotally connect the first pivoting component to the pivoting hole of the pivoting body of the body and a driving gear, so that the driving handle is When being pulled, centering on the first pivoting element, swinging back and forth at an appropriate angle, A second pivot hole and a spring slot are disposed at the lower side of the first pivot hole, and the second pivot hole is configured to pivotally provide a one-way latching member, and the spring slot is available Providing a spring and a steel ball, wherein the one-way latching member is provided with two latching ratchets corresponding to the driving gear, and the one-way latching member is provided with a positioning flange corresponding to the steel ball, and the single or the rear is moved forward or backward To the latch member, the steel ball can be positioned to the right or left of the positioning flange such that one of the latching ratchets forms a positively latched state on the drive gear, or another latching ratchet opposes the drive gear In the state of the click state, the drive gears are used to push the plurality of reverse teeth on the drive rack forward or backward. The pipe wrench as claimed in claim 1 or 2, wherein the body is provided with a pivoting hole at one end of the straight portion, and the pivoting hole is configured to pivotally fix a fixed caliper. The pipe wrench as claimed in claim 1 is a fastening structure, wherein: the fixed body of the body The inner side is provided with a circular arc portion, and the circular arc portion of the main body and the crotch portion of the movable caliper body are provided with a plurality of corresponding tooth portions as a user for increasing the bite force when clamping the tubular member.