A wire threading device for building electrical construction

Abstract

The present invention discloses a wire threading device for building electrical construction in the field of building electrical wire threading technology, comprising a shell, a traction rope arranged on the left side of the shell for pulling the shell, and a channel opened on the right side of the shell, the inner bottom wall of the shell is provided with a slide groove, and a driving plate is slidably connected inside the slide groove; when the cable is fixed to the inside of the shell, the driving plate is pushed to move by the insertion of the cable so that the driving plate moves to contact with the support member and then squeezes the support member, thereby fixing the cable by the movement of the support member and the clamping member, and then the cable is quickly pulled to the right so that the cable can remain clamped by the clamping member so that the contact end and the support member move to the right together, thereby tightening the cable, and then the cable is kept in the state of pulling the clamping member to the right, that is, being stretched, and the tensile resistance is proportional to the resistance encountered during the stretching process.

Description

Technical Field

[0001] The invention relates to the technical field of building electrical wiring, in particular to a wiring device for building electrical construction. Background Art

[0002] The threading device, i.e. the threader, is an auxiliary device used to lay cables into the wiring hole (pipe or wall passage). It first passes the traction rope through one end of the wiring hole through the driving device, and then extends it out from the other end. Then, the end of the cable is fixed with the end of the traction rope, and then the traction rope is reeled up, and then the cable is pulled out from the inside of the wiring hole through the traction rope;

[0003] During use, the cable and the traction rope are generally fixed by wrapping the cable and the end of the traction rope with tape to complete the fixation, or by peeling off the plastic layer of the cable and wrapping the internal copper wire on the traction rope, or by hooking the copper wire on the traction rope;

[0004] The above method can complete the fixation of the traction rope and the cable, but the fixing process is cumbersome and the effect is not ideal. When the traction rope drives the cable through the wiring hole, the cable will be subjected to greater friction, which will cause the cable to encounter greater resistance, which will easily cause the cable to separate from the traction rope. In addition, the copper wire inside the cable end is in an exposed state, which can easily cause damage to the cable. Summary of the invention

[0005] The object of the present invention is to provide a wire threading device for building electrical construction to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a wire threading device for building electrical construction, comprising a shell, a traction rope arranged on the left side of the shell for pulling the shell, and a channel opened on the right side of the shell, the inner bottom wall of the shell is provided with a slide groove, a driving plate is slidably connected inside the slide groove, and two contact rods are fixedly connected to the side wall of the driving plate, the right end of the contact rod is provided with a one-piece contact end, the contact end is wedge-shaped, and a cross bar is provided on the right side of the driving plate, the cross bar is slidably connected with a stretching groove, the stretching groove is arranged on the inner bottom wall of the shell, the stretching groove is longer than the slide groove, and two support members are slidably connected to the cross bar, the ends of the support members are wedge-shaped, and a first spring is fixedly connected between the two support members and the inner wall of the cross bar, the support members are slidably connected with a clamping member, and a second spring is provided between the support member and the clamping member.

[0007] As a further solution of the present invention, a backstop group is provided inside the housing;

[0008] The backstop group includes a first wedge block fixedly connected to the left side wall of the bottom of the support member and a second wedge block arranged on the right side of the first wedge block, the second wedge block is fixedly connected to a rack rod, a gear is meshed under the rack rod, the rack rod is slidably connected to the shell, a third spring is fixedly connected between the rack rod and the shell, and the gear is rotatably connected to the side wall of the shell.

[0009] As a further solution of the present invention, a through slot is formed on the side wall of the shell, and the side wall of the driving plate is slidably connected to the through slot and extends to the outside of the through slot.

[0010] As a further solution of the present invention, the clamping member consists of a positioning block and a clamping portion, the positioning block is slidably connected to the support member and the second spring is fixedly connected between the inner wall of the support member and the positioning block, a socket is provided on the positioning block, and the socket is slidably connected to the clamping portion.

[0011] As a further solution of the present invention, the clamping portion is configured to be semicircular or U-shaped flat.

[0012] As a further solution of the present invention, the channel is curved.

[0013] As a further solution of the present invention, the inner side wall of the clamping portion is provided with clamping teeth.

[0014] As a further solution of the present invention, the shell is rotatably connected to a connecting end, and the connecting end is fixedly connected to the traction rope.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the cable is fixed inside the shell, the present invention pushes the driving plate to move by inserting the cable so that the driving plate moves to contact the support member and squeezes the support member, thereby fixing the cable by moving the support member and the clamping member. Then, by quickly pulling the cable to the right, the cable can be kept in a state of being clamped by the clamping member so that the contact end and the support member move to the right together, thereby tightening the cable. Then, the cable is kept in a state of being pulled to the right, that is, in a tightened state, so that the cable can be stretched. The tensile strength is proportional to the resistance encountered during the stretching process. When releasing the cable, the release can be completed by pushing the cable inward. The fixing and releasing states are relatively simple relative to winding, covering and hooking, and can avoid multiple steps before fixing the cable.

[0017] 2. The second wedge block will continuously limit the displacement of the first wedge block in one direction under the push of the third spring, thereby limiting the leftward movement of the first wedge block, so that the first wedge block cannot move to the left after moving to the right, thereby ensuring that the cable clamping force cannot decrease after increasing, thereby increasing the fixing effect of the cable, and enabling the cable and the traction rope to move left and right in the wiring hole without causing the cable to move left relative to the shell when the traction rope drives the shell to move in the opposite direction in the wiring hole, thereby invalidating the clamping effect of the clamping member and causing the cable to separate from the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the housing of the present invention;

[0020] Figure 3 It is a schematic diagram of the positional relationship between the driving plate and the clamping member, and between the cross bar and the rack bar of the present invention;

[0021] Figure 4 It is a schematic diagram of the support member and the positioning block and the first wedge block and the second wedge block of the present invention;

[0022] Figure 5 It is a schematic diagram of the first wedge block and the second wedge block when the support member of the present invention is in contact with the contact end;

[0023] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0024] Figure 7 It is a schematic diagram of the clamping portion, the positioning block and the insertion hole of the present invention;

[0025] Figure 8 It is a schematic diagram of the positional relationship between the housing, the slide groove and the stretching groove of the present invention;

[0026] Fig. 9 It is a schematic diagram of the bending state of the cable of the present invention when it is clamped;

[0027] Fig.10 It is a schematic diagram of the flat clamping part of the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0029] 1. Shell; 2. Traction rope; 3. Slide groove; 4. Drive plate; 5. Contact rod; 6. Contact end; 7. Cross bar; 8. Stretching groove; 9. Support member; 10. First spring; 11. Clamping member; 12. Second spring; 13. Channel; 14. First wedge block; 15. Second wedge block; 16. Rack rod; 17. Gear; 18. Third spring; 19. Through groove; 20. Positioning block; 21. Clamping part; 22. Socket; 23. Connecting end. DETAILED DESCRIPTION

[0030] See also Figure 1-Figure 10 The present invention provides a technical solution: a wire threading device for building electrical construction, comprising a shell 1, a traction rope 2 arranged on the left side of the shell 1 for pulling the shell 1, and a channel 13 opened on the right side of the shell 1, a slide groove 3 is opened on the inner bottom wall of the shell 1, a driving plate 4 is slidably connected inside the slide groove 3, two contact rods 5 are fixedly connected to the side wall of the driving plate 4, a one-piece contact end 6 is arranged at the right end of the contact rod 5, and the contact end 6 is wedge-shaped, a cross bar 7 is arranged on the right side of the driving plate 4, and a stretching groove 8 is slidably connected to the cross bar 7, and the stretching groove 8 is opened on the inner bottom wall of the shell 1, and the stretching groove 8 is longer than the slide groove 3. Two support members 9 are slidably connected to the cross bar 7, and the ends of the support members 9 are wedge-shaped. A first spring 10 is fixedly connected between the two support members 9 and the inner wall of the cross bar 7, and the support members 9 are slidably connected with a clamping member 11, and a second spring 12 is arranged between the support member 9 and the clamping member 11.

[0031] like Figure 1-Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown:

[0032] The traction rope 2 is driven by a driving group, and the driving group can be various types in the prior art, such as a pistol-type drive or a wheel-type drive, so that the traction rope 2 can drive the housing 1 to pass through one end of the wiring hole and pass through the other end. The driving plate 4 is at the rightmost side of the slide groove 3, and the cross bar 7 is at the leftmost side of the stretching groove 8, and the contact end 6 is at the right side of the support member 9. At this time, the end of the cable is inserted into the housing 1 through the channel 13. At this time, the cable will move to the left between the two clamping members 11 until the end of the cable moves to contact the driving plate 5, and the driving plate 4 is pushed to slide along the slide groove 3 from the rightmost side to the leftmost side by the force of the cable insertion;

[0033] When the driving plate 4 slides from the rightmost side to the leftmost side of the slide slot 3, the driving plate 4 drives the contact end 6 to approach the support member 9 through the contact rod 5. When the contact end 6 contacts the inclined side wall of the support member 9, the contact end 6 continues to move to squeeze the two support members 9, so that the support members 9 can move along the cross bar 7 and compress the second spring 12. At this time, the two support members 9 will drive the clamping member 11 to approach the cable. When the clamping member 11 contacts the cable, the compression of the second spring 12 will cause the clamping member 11 to clamp the cable. At this time, the driving plate 4 will be on the left side of the slide slot 3, and the cable is initially clamped.

[0034] Then quickly pull the cable clamped by the clamping member 11 to move to the right. At this time, the cable will drive the clamping member 11, the support member 9, the contact end 6, the contact rod 5 and the driving plate 4 to move to the right synchronously while being clamped. Because the length of the slide slot 3 is shorter than the stretching slot 8, that is, when the driving plate 4 is at the rightmost side of the slide slot 3, the cross bar 7 is not at the rightmost side of the stretching slot 8. At this time, the wedge-shaped contact end 6 will keep squeezing the side wall of the support member 9, so that the support member 9 can transmit a stable clamping to the clamping member 11 through the second spring 12, thereby ensuring the clamping effect of the clamping member 11 on the cable;

[0035] Then the traction rope 2 can be reeled up through the driving group. When the traction rope 2 is reeled up, if the cable is wound on the winding drum, the cable is manually stretched to a certain extent before the traction rope 2 pulls the shell 1 into the wiring hole, until the shell 1 and the cable enter the wiring hole. If the cable is in a relaxed state, the cable is still stretched to a certain extent until the shell 1 and the cable enter the wiring hole. After the cable enters the wiring hole, the cable is always stretched by the traction rope 2. At this time, friction will be generated between the cable and the wiring hole, that is, the cable will encounter greater resistance when stretched. Because the length of the slide groove 3 is shorter than the stretching groove 8, after the driving plate 4 and the contact end 6 stop at the rightmost side of the slide groove 3, the clamping member 11 and the support Part 9 has a distance that can be moved to the right. When the clamping force of the clamping member 11 on the cable is large, the rubber layer of the outer layer of the cable will be squeezed to deform it, so that the clamping member 11 and the support member 9 can move slightly toward the cable. At this time, the support member 9 will move a certain distance to the right. When the support member 9 moves to the right, the squeezing force applied to the support member 9 by the contact end 6 will gradually increase, thereby increasing the thrust applied to the clamping member 11 by the support member 9, so that the squeezing force of the clamping member 11 on the cable is enhanced, thereby improving the tensile resistance of the cable, and the squeezing force is positively correlated with the resistance of the cable. The greater the resistance of the cable, the stronger the squeezing force on the cable when the support member 9 moves to the right, thereby ensuring that the cable will not fall off when being pulled;

[0036] When the traction rope 2 pulls the housing 1 out of the wiring hole, the cable needs to be extended out of the housing 1. At this time, the traction rope 2 and the cable are respectively in the upper and lower positions, that is, the housing 1 is in a vertical state. It should be noted that the traction rope 2 is located above the housing 1 in the vertical state of the housing 1. Because the cable loses resistance when the traction stops, the first spring 10 will elastically reset to push the two support members 9 away from the cable, and the second spring 12 will gradually reset when the clamping member 11 is separated from the cable, and the support member 9 will push the contact rod 5 and the contact end 6 to slide downward along the slide groove 3 through its inclined surface when resetting, so that the contact end 6 is on one side of the support member 9, thereby releasing the clamping fixation of the cable;

[0037] The present invention, when fixing the cable inside the shell 1, pushes the driving plate 4 to move by inserting the cable so that the driving plate 4 moves to contact the support member 9 and then squeezes the support member 9, thereby fixing the cable by moving the support member 9 and the clamping member 11, and then quickly pulling the cable to the right so that the cable can remain clamped by the clamping member 11 so that the contact end 6 and the support member 9 move to the right together, thereby tightening the cable, and then keeping the clamping member 11 pulled to the right, that is, in the tightened state, the cable can be stretched, and the tensile resistance is proportional to the resistance encountered during the stretching process, and when releasing the cable, the release can be completed by pushing the cable inward, and the fixing and releasing states are relative to winding, covering and hooking, and the process is simple, and multiple steps before fixing the cable can be avoided, so that the cable can maintain continuous and stable stretching during stretching without falling off.

[0038] A backstop group is provided inside the housing 1;

[0039] The backstop group includes a first wedge block 14 fixedly connected to the left side wall of the bottom of the support member 9 and a second wedge block 15 arranged on the right side of the first wedge block 14. The second wedge block 15 is fixedly connected to a rack rod 16, and a gear 17 is meshed below the rack rod 16. The rack rod 16 is slidably connected to the housing 1, and a third spring 18 is fixedly connected between the rack rod 16 and the housing 1. The gear 17 is rotatably connected to the side wall of the housing 1.

[0040] A through slot 19 is formed on the side wall of the housing 1 , and the side wall of the driving plate 4 is slidably connected to the through slot 19 and extends to the outside of the through slot 19 .

[0041] like Figure 1-Figure 6 As shown:

[0042] By providing the through slot 19, the left and right movement of the driving plate 4 in the slide slot 3 and the through slot 19 can be completed by manual sliding, which increases the convenience of fixing and releasing the cable;

[0043] For example, before fixing the cable, the cross bar 7 is placed at the leftmost side of the stretching groove 8 by adjusting the shell 1 from the vertical (it should be noted that the traction rope 2 is located below the shell 1 in the vertical state at this time) and the horizontal state, and then the drive plate 4 is actively slid to place it at the rightmost side of the slide groove 3, and then the cable is inserted into the shell 1 through the channel 13, and moves to the left through the two clamps 11 to push the drive plate 4 to slide to the left to the limit. At this time, the contact end 6 can squeeze the support member 9 on the way to the left, so that the support member 9 and the clamp 11 cooperate to preliminarily clamp and fix the cable. The gear 17 is then manually rotated so that the gear 17 drives the rack rod 16 and the second wedge block 15 to move toward the outside of the housing 1, and then the cable is quickly pulled to move to the right, thereby moving the clamping member 11 and the contact end 6 to the right together. When the driving plate 4 cannot continue to move to the right, the first wedge block 14 follows the support member 9 and moves to the right side of the second wedge block 15, and then the rotation of the gear 17 can be released. At this time, the rack rod 16 and the first wedge block 14 can be driven to move toward the inside of the housing 1 under the action of the third spring 18. When the second wedge block 15 moves to fit the side wall of the first wedge block 14 (such as Figure 6 ), the first wedge block 14 will block the second wedge block 15, so that the elasticity of the third spring 18 cannot be completely released, that is, the second wedge block 15 still has a tendency to move toward the middle of the housing 1, but cannot move due to the obstruction of the first wedge block 14;

[0044] At this time, the cable is in a state of being clamped by the clamping member 11, and the driving plate 4 is at the rightmost side of the slide slot 3, and the second wedge block 15 blocks the tendency of the first wedge block 14 to move to the left, so the shell 1 and the cable can be directly stretched by the traction rope 2 at this time, and there is no need to manually pre-tighten the cable before stretching. After the cable and the shell 1 enter the wiring hole, the cable will be subject to resistance and have a tendency to move to the right. At this time, the clamping member 11 and the support member 9 will be affected by the contact end 6 when moving to the right, thereby increasing the clamping force and resistance of the cable, so that the tensile force of the cable is proportional to the resistance. For example, after the rubber layer of the outer layer of the cable is squeezed and deformed, the clamping member 11 will move closer again to continue to clamp the cable, and the support members 9 will also move closer to each other. , at this time, the cross bar 7 will move a very small distance to the right in the stretching groove 8, then the first wedge block 14 will move to the right relative to the second wedge block 15, and at this time, the second wedge block 15 will move to the position of continuously fitting with the first wedge block 14 under the push of the third spring 18, thereby limiting the leftward movement of the first wedge block 14, so that the first wedge block 14 cannot move to the left after moving to the right, thereby ensuring that the cable clamping force cannot be reduced after increasing, thereby increasing the fixing effect of the cable, and enabling the cable and the traction rope 2 to move left and right in the wiring hole without causing the cable to move left relative to the housing 1 when the traction rope 2 drives the housing 1 to move in the opposite direction in the wiring hole, thereby causing the clamping effect of the clamping member 11 to fail and causing the cable to separate from the housing 1;

[0045] When the traction rope 2 and the cable are extended from the wiring hole, the process of releasing the fixing of the cable is as follows:

[0046] Manually rotate the gear 17 so that the gear 17 drives the rack rod 16 to move outside the housing 1. At this time, the second wedge block 15 will be disengaged from the first wedge block 14 and move to one side of the first wedge block 14. Then manually push the drive plate 4 to the left to the limit, press the drive plate 4 to prevent it from sliding, and then directly push the cable to the left. After the clamping member 11 moves to the support member 9 and does not contact the contact end 6, the cable is released, and then the gear 17 can be released.

[0047] The clamping member 11 is composed of a positioning block 20 and a clamping portion 21. The positioning block 20 is slidably connected to the support member 9 and the second spring 12 is fixedly connected between the inner wall of the support member 9 and the positioning block 20. A socket 22 is provided on the positioning block 20, and the socket 22 is slidably connected to the clamping portion 21.

[0048] As a further solution of the present invention, the clamping portion 21 is configured to be semicircular or U-shaped flat.

[0049] like Figure 7 and Fig.10 As shown:

[0050] The clamping portion 21 can be arc-shaped to clamp a round cable. When clamping a flat cable, the clamping portion 21 only needs to be set as follows: Fig.10 As shown, the two opposite clamping portions 21 are configured to be U-shaped so as to be able to clamp the flat cable;

[0051] The insertion hole 22 can facilitate the replacement of the clamping portion 21 and the positioning block 20. In this case, it is only necessary to set the shell 1 to be detachable. The disassembly method is relatively simple, such as setting the shell 1 to be connected in two parts, such as upper and lower parts or left and right parts. This is common knowledge, so it is not specifically shown in the figure. The insertion hole 22 is set on the right side of the positioning block 20, and a magnet can be set on its inner wall to adsorb and position the clamping portion 21 so that it will not fall off.

[0052] The channel 13 is curved.

[0053] like Figure 2 and Fig. 9 As shown:

[0054] When the channel 13 is curved, after the clamping portion 21 clamps the cable, the cable outside the housing 1 and the cable inside the housing 1 are in a relatively inclined state, thereby further increasing the tensile resistance.

[0055] The inner wall of the clamping portion 21 is provided with clamping teeth.

[0056] like Figure 7 As shown:

[0057] The friction can be increased by clamping the teeth.

[0058] The housing 1 is rotatably connected to a connecting end 23 , and the connecting end 23 is fixedly connected to the traction rope 2 .

[0059] As shown in the figure:

[0060] By rotating the connecting end 23 , the connecting end 23 is fixedly connected to the traction rope 2 , so that the flexibility of the housing 1 can be enhanced.

Claims

1. A wire threading device for building electrical construction, comprising a housing (1), a traction rope (2) arranged on the left side of the housing (1) for pulling the housing (1), and a channel (13) opened on the right side of the housing (1), characterized in that: The inner bottom wall of the shell (1) is provided with a slide groove (3), a driving plate (4) is slidably connected inside the slide groove (3), two contact rods (5) are fixedly connected to the side wall of the driving plate (4), the right end of the contact rod (5) is provided with a contact end (6), the contact end (6) is wedge-shaped, a cross bar (7) is provided on the right side of the driving plate (4), the cross bar (7) is slidably connected with a stretching groove (8), the stretching groove (8) is provided on the inner bottom wall of the shell (1), the stretching groove (8) is longer than the slide groove (3), two support members (9) are slidably connected to the cross bar (7), the ends of the support members (9) are wedge-shaped, a first spring (10) is fixedly connected between the two support members (9) and the inner wall of the cross bar (7), the support members (9) are slidably connected with a clamping member (11), and a second spring (12) is provided between the support member (9) and the clamping member (11).

2. A wire threading device for building electrical construction according to claim 1, characterized in that: A backstop group is provided inside the housing (1); The backstop group comprises a first wedge block (14) fixedly connected to the left side wall of the bottom of the support member (9) and a second wedge block (15) arranged on the right side of the first wedge block (14); the second wedge block (15) is fixedly connected to a rack rod (16); a gear (17) is meshed below the rack rod (16); the rack rod (16) is slidably connected to the housing (1); a third spring (18) is fixedly connected between the rack rod (16) and the housing (1); and the gear (17) is rotatably connected to the side wall of the housing (1).

3. A wire threading device for building electrical construction according to claim 1, characterized in that: A through slot (19) is formed on the side wall of the housing (1), and the side wall of the drive plate (4) is slidably connected to the through slot (19) and extends to the outside of the through slot (19).

4. A wire threading device for building electrical construction according to claim 1, characterized in that: The clamping member (11) is composed of a positioning block (20) and a clamping portion (21); the positioning block (20) is slidably connected to the support member (9); and the second spring (12) is fixedly connected between the inner wall of the support member (9) and the positioning block (20); a plug hole (22) is provided on the positioning block (20); and the plug hole (22) is slidably connected to the clamping portion (21).

5. A wire threading device for building electrical construction according to claim 4, characterized in that: The clamping portion (21) is configured to be semicircular or U-shaped and flat.

6. A wire threading device for building electrical construction according to claim 1, characterized in that: The channel (13) is curved.

7. A wire threading device for building electrical construction according to claim 4, characterized in that: The inner side wall of the clamping portion (21) is provided with clamping teeth.

8. A wire threading device for building electrical construction according to claim 1, characterized in that: The housing (1) is rotatably connected to a connecting end (23), and the connecting end (23) is fixedly connected to the traction rope (2).

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