TWI707803B - Belt changing device and tool provided with the belt changing device - Google Patents

Abstract

A belt changing device includes: a gear with a set of synchronously rotating teeth and a force applying part; a blocking member, which is arranged beside the gear, and the blocking member cooperates with any tooth to determine that the gear is idling in one direction and stationary in the reverse direction Do not move. The belt changing device is configured with a tool for winding belts, such as a puller or a sub-frame connected to the puller. The force application part is combined with a winding shaft of the tool, and the gear is blocked by the blocking member, and a scroll spring of the counterbalance tool provides the torque for the rotation of the winding shaft. In this way, the stopper cooperates with the gear to limit the rewinding shaft to stand still, which becomes a safe and simple tape changing operation. Moreover, the scroll spring is counterbalanced by the blocking member, the torque does not change, adjustment or correction operations are eliminated, and the problems encountered in the conventional belt change are effectively solved.

Description

Belt changing device and tool provided with the belt changing device

The present invention relates to the belt changing technology in the binding field, in particular to a belt changing device and a tool provided with the belt changing device.

The known binding tool is usually a hand puller, which has a scroll spring that provides a torque for the rotation of a reeling shaft to help the reeling shaft to recover a belt.

During use, the belt is pulled out to a certain length to bind an article. The take-up shaft releases the belt, and the spiral spring produces deformation, such as reducing the diameter or increasing the number of turns.

However, the edges of the article may be at right angles or even sharp angles, which will inevitably wear or cut the belt, which will adversely affect the structure of the belt and relatively reduce the safety of binding. In this way, changing the hand puller or strap becomes one of the options.

However, replacing the old hand puller with a new one will only increase the economic burden. Replacing a new belt can reduce the economic burden, but it faces the problem of the release torque of the scroll spring. Scroll springs that release torque need to be re-adjusted or corrected by professional equipment. During the adjustment process, incidents of scroll springs flying and cutting human bodies are heard from time to time, which are dangerous behaviors.

Therefore, how to improve the danger of the hand puller during the belt change has become an urgent problem to be solved by the present invention.

In view of this, the present invention provides a belt changing device, one of its main purposes is to adopt a unidirectional idling and reverse stationary structure.

One of the main objectives of the present invention is to provide a tool equipped with the belt changing device. The tool is used to wind up the belt, such as a hand puller or a sub-frame connected to the puller, which effectively solves the drawbacks of the torque released by the scroll spring. , Let changing the belt become a simple and safe operation.

Due to the achievement of the above objectives, the belt changing device of the present invention includes: a gear and a blocking member. Wherein, the gear has a set of teeth that rotate synchronously and a force applying part. The blocking member is arranged beside the gear, and it cooperates with any tooth to determine that the gear is idling in one direction and stationary in the reverse direction.

When the belt changing device is equipped with a tool, such as a hand puller or a sub-frame connected to the hand puller, the force applying part is combined with a reeling shaft of the tool, and the gear is blocked by the stopper, and a scroll spring of the counterbalance tool provides The torque at which the take-up shaft rotates.

In this way, in the belt changing device of the present invention, the stopper cooperates with the gear to restrict the winding shaft from standing still, which becomes a safe and simple belt changing operation. Moreover, the scroll spring is counterbalanced by the blocking member, and the torque does not change, which naturally eliminates the adjustment or correction work, and effectively solves the problems encountered in the conventional belt change.

In order to make the above-mentioned objects, structures, features and advantages of the present invention more simple and understandable, one or more preferred embodiments are given as follows in detail with the accompanying drawings.

10‧‧‧Tape changing device

11‧‧‧Shell

11A‧‧‧Top surface

11B, 41‧‧‧Bottom

12‧‧‧Locking hole

13A、13B‧‧‧Fastener

14‧‧‧Assembly room

15‧‧‧Expanding groove

16‧‧‧Gear hole

16A‧‧‧Convex ring

17, 23‧‧‧Axle hole

18‧‧‧Combination hole

19A, 19B‧‧‧Pivot

20‧‧‧Close

21‧‧‧Hole

22‧‧‧Limited hole

24‧‧‧Stud

30‧‧‧Gear

31‧‧‧tooth

32‧‧‧Gear shaft

33‧‧‧Forcing Department

35‧‧‧Force part

40‧‧‧Unlock button

42‧‧‧Shaft

43‧‧‧Eccentric section

44‧‧‧Thick

45‧‧‧Thin part

46‧‧‧Internal threaded hole

47‧‧‧ side

50‧‧‧Block

51‧‧‧tip

52‧‧‧Curved end

53‧‧‧Cylinder

54‧‧‧Elastic parts

60‧‧‧Hand puller

61‧‧‧Main body

62‧‧‧First Zone

63‧‧‧Second Zone

64‧‧‧hook body

65‧‧‧Operation piece

66、76‧‧‧Rewinding reel

66A‧‧‧head

66B‧‧‧Concave

67‧‧‧Scroll Spring

68‧‧‧Pivot shaft

70‧‧‧Subframe

72、74‧‧‧Connecting rod

Figure 1 is an exploded perspective view of a preferred embodiment of the tape changing device of the present invention.

Figure 2 is a perspective view of the housing from another angle.

Figure 3 is a sectional view of a part of the belt changing device.

Figure 4 is a combined perspective view of the tape changing device from a bottom angle.

Figure 5 is a perspective view of the release button.

Figure 6 is a combined perspective view of the tape changing device from a plan view.

Figure 7 is a combined cross-sectional view taken along the line A-A in Figure 6.

Figure 8 is a cross-sectional view of another assembly of the tape changing device.

Figure 9 is a perspective view of a tool equipped with a belt changing device.

Figure 10 is a cross-sectional view of the tool and the belt changing device.

Figure 11 is a schematic diagram of another tool equipped with a belt changing device.

Figure 1 depicts a preferred embodiment of the belt changing device 10, illustrating that the belt changing device 10 is composed of a housing 11, a closing member 20, a gear 30, a release button 40, a blocking member 50 and an elastic member 54 composition.

Fig. 1 shows a perspective view of the housing 11 from a top angle, and Fig. 2 depicts a perspective view of the housing 11 from a bottom angle. The surface defining the casing 11 facing upward in FIG. 1 is the top surface 11A, and the surface of the casing 11 different from the top surface 11A is regarded as the bottom surface 11B.

Among them, the two coupling holes 18 penetrate from the top surface 11A of the housing 11 to the bottom surface 11B. An expansion groove 15 is inserted into the bottom surface 11B of the housing 11 to communicate with an assembly chamber 14. The assembly chamber 14 and the expansion groove 15 are formed between the two coupling holes 18, from the assembly chamber 14 to the top surface 11A of the housing 11 Two locking holes 12, a gear hole 16 and a shaft hole 17. A convex ring 16A protrudes from the assembly chamber 14 and surrounds the gear hole 16 to increase the depth.

In addition, two pivotal portions 19A, 19B are formed on the wall surface of the assembly chamber 14 enclosed by the housing 11. Each pivotal portion 19A, 19B is divided into two parts, a semicircular groove and a circular groove.

FIG. 3 is a combined cross-sectional view of a part of the belt changing device 10. In the figure, a set of fasteners 13A passes through the locking hole 12 of the housing 11 and locks the hole 21 of the closing member 20 so that the closing member 20 is fixed to the enlarged diameter groove 15 and seals the opening of the assembly chamber 14. The fastener 13A is a screw or a bolt.

As shown in FIGS. 1 and 7, the closing member 20 forms a restricting hole 22 and a shaft hole 23. When the closure 20 is combined with the housing 11, the restricting hole 22 is facing the gear hole 16, and the shaft hole 23 and the shaft hole 17 are opposite.

Next, the gear 30 is seen. A set of teeth 31 protrude from the edge of the gear 30 in the circumferential direction. A gear shaft 32 protrudes from both sides of the gear 30 in the axial direction. One end of the gear shaft 32 extends outward with a force applying portion 33, and the other end forms a force receiving portion 35. Therefore, the gear 30, the teeth 31, the force applying portion 33 and the force receiving portion 35 maintain a synchronous rotation relationship.

In this embodiment, the force applying portion 33 is a square corner post, and the force receiving portion 35 is a hexagonal corner groove recessed into the end surface of the gear shaft 32. In some embodiments, the force applying portion 33 or the force receiving portion 35 may be polygonal, star-shaped, or straight-shaped.

As seen from Figures 4, 6, and 7, the gear shaft 32 is inserted into the gear hole 16 and the restricting hole 22, but does not pass through the closing member 20, and the supporting gear 30 is aligned with the convex ring 16A and can rotate in the assembly chamber 14. At the same time, the force applying portion 33 passes through the restricting hole 22 and exceeds the closing member 20, and the opening of the force receiving portion 35 is not covered by the housing 11.

As shown in Figures 1, 7, and 8, the blocking member 50 is a rigid sheet body. One end of the rigid sheet body forms a curved end 52. The curved end 52 is convex and protrudes along the axial direction of the curved end 52. Cylinder 53. When the semi-circular groove of the pivotal portion 19A receives the curved end 52 of the blocking member 50, the cylinder 53 is inserted into the circular groove of the pivotal portion 19A to be capable of rotating. Therefore, the stopper 50 is arranged in the assembly chamber 14 of the housing 11 and located beside the gear 30.

The other end of the blocking member 50 forms a tip 51, and one side of the tip 51 is inclined of. The tip 51 blocks any tooth 31 and determines that the gear 30 is idling in one direction and stationary in the reverse direction. At this moment, the hypotenuse of the tip 51 faces the gear 30.

When in use, the gear 30 is rotated in a clockwise direction (see Fig. 8), the tooth 31 hits the hypotenuse of the tip 51 and pushes the blocking member 50 away, so that the gear 30 has a one-way idling function. On the contrary, rotating the gear 30 in the counterclockwise direction (see Fig. 8), the tooth 31 is blocked by the tip 51, and the gear 30 remains stationary.

The power of the blocking member 50 to maintain the blocking effect comes from the elastic member 54. The elastic member 54 is a compression spring. One end of the compression spring resists the wall of the housing 11 surrounding the assembly chamber 14, and the other end is against the blocking member 50. Therefore, the elastic member 54 provides the force required for the yaw movement of the blocking member 50 toward the gear 30.

Next, as shown in FIGS. 5, 7, and 8, the bottom surface 41 of the release button 40 extends coaxially with a shaft 42 and an eccentric section 43, and the eccentric section 43 forms an internal threaded hole 46. When the shaft portion 42 is inserted into the shaft hole 17 of the housing 11, the eccentric section 43 enters the assembly chamber 14, and its mating elastic member 54 touches both sides of the blocking member 50. A stud 24 passes through the shaft hole 23 of the closure member 20 and locks the internal threaded hole 46 of the eccentric section 43 to complete the assembly operation. At this moment, the release button 40 is rotatable outside the housing 11, and the eccentric section 43 serves as an end point for the blocking member 50 to deflect toward the gear 30.

Furthermore, the different thicknesses from the internal threaded hole 46 to the eccentric section 43 are divided into a thick portion 44 and a thin portion 45, and the thick portion 44 and the thin portion 45 are connected by two side surfaces 47. When in use, one of the two side surfaces 47 abuts against the blocking member 50.

Of course, the blocking member 50 can also be optionally installed on the pivotal portion 19B. However, the elastic member 54 will be on the other side of the eccentric section 43, and the direction in which the gear 30 is blocked by the blocking member 50 at rest and idling is completely opposite.

Figure 9 is a perspective view of a tool. The tool is a hand puller 60. The hand puller 60 has a main body 61 connected to a first belt 62 with a hook 64. With a second belt 63, the binding operation is carried out. After the ties are loosened, the short second strap 63 remains unchanged, and the long first strap 62 is manually operated by an operating member 65 pivotally connected to the main body 61 as a recovery action with a shortened length.

The hand puller 60 is installed with the belt changing device 10. Specifically, another set of fasteners 13B pass through the coupling holes 18 of the housing 11 (refer to Figures 1, 4, and 7) to secure the tape changing device 10 to the main body 61. Among them, the fastener 13B is a rivet.

FIG. 10 is a cross-sectional view illustrating that the first belt 62 is wound around a take-up shaft 66 after the hand puller 60 is combined with the belt changing device 10. The winding shaft 66 is erected on the main body 61, one end of which is combined with the scroll spring 67, and the other end is formed with a head 66A. The head 66A is shielded by the housing 11 in the expanding groove 15 and has a recess 66B. The recess 66B is a square groove that can fit the force applying portion 33, so that the stopper 50 (see Figure 8) blocks the gear 30. The gear 30 counteracts the torque provided by the scroll spring 67 to rotate the winding shaft 66.

Generally, the winding shaft 66 is restricted by the gear 30 and is stationary, so the replacement of the first belt 62 becomes a simple and safe operation. Moreover, the torque of the scroll spring 67 does not change, which eliminates the need for adjustment or correction work, and effectively solves the problems encountered in the conventional belt change.

After the belt is changed, the release button 40 is forced to swing relative to the housing 11, driving the eccentric section 43 to rotate in the same direction, and the thick part 44 pushes the blocking member 50 away, releasing the blocking relationship between the tip 51 and the tooth 31 (see Figures 8 and 9) ). The gear 30 is free and no longer counteracts the torque of the scroll spring 67 by the winding shaft 66. Therefore, the scroll spring 67 drives the winding shaft 66 to rotate and wind the first belt 62.

In addition, the force receiving part 35 receives an external tool, such as a hexagon wrench or a torque detection device. The hexagonal wrench helps the gear 30 to rotate, and the auxiliary teeth 31 release the blocking relationship of the tip 51 (see Figures 8 and 9). The torque detection equipment is The wheel 30 and the winding shaft 66 are used to test the torque value of the scroll spring 67.

In some embodiments, the puller 60 does not directly take up the belt, but takes up the belt through a sub-frame 70, as shown in FIG. 11. Among them, a connecting rod 72 connects the hand puller 60 and the sub-frame 70 together to form another tool. The other connecting rod 74 is arranged at the rear end of the sub-frame 70 and is used to connect the second belt 63. The sub-frame 70 is assembled with another winding shaft 76, and the winding shaft 76 is between the two connecting rods 72 and 74 to wind the first belt 63. The first belt 63 is pulled out through the gap of a pivot shaft 68 of the hand puller 60.

In the same way, the belt changing device 10 is installed outside the sub-frame 70, and the winding shaft 76 counteracts the torque of the scroll spring. As for the structure of the belt changing device 10 in combination with the winding shaft 76 and the structure of the winding shaft 76 with the scroll spring, please refer to the technical content of FIGS. 9 and 10, which will not be repeated here.

10‧‧‧Tape changing device

11‧‧‧Shell

13A、13B‧‧‧Fastener

14‧‧‧Assembly room

18‧‧‧Combination hole

19A, 19B‧‧‧Pivot

30‧‧‧Gear

31‧‧‧tooth

32‧‧‧Gear shaft

35‧‧‧Force part

43‧‧‧Eccentric section

44‧‧‧Thick

45‧‧‧Thin part

47‧‧‧ side

50‧‧‧Block

51‧‧‧tip

52‧‧‧Curved end

54‧‧‧Elastic parts

Claims (9)

A belt changing device includes: a housing (11) with an assembly chamber (14) and a gear hole (16) leading to the assembly chamber (14); a closure (20) is fixed on the housing (11) and The assembly chamber (14) is sealed, and a restricting hole (22) is formed at the position where the closing member (20) faces the gear hole (16); a gear shaft (32) protrudes from both sides of a gear (30) in the axial direction. The gear shaft (32) is inserted into the gear hole (16) and the restricting hole (22) to make the gear (30) rotate in the assembly chamber (14), and a force application part (33) extends outward from the gear shaft (32) and beyond the closing part (20) A set of teeth (31) of the gear (30) rotates synchronously with the force applying portion (33); and a blocking member (50) is arranged between the housing (11) and the closing member (20) and is located Next to the gear (30), the blocking member (50) cooperates with any tooth (31) to determine that the gear (30) is idling in one direction and stationary in the reverse direction. The belt changing device described in item 1 of the scope of patent application, wherein the gear shaft (32) has a force receiving portion (35) that drives the gear (30) to rotate, and the force receiving portion (35) and the force The parts (33) are at different ends of the gear shaft (34). The belt changing device as described in item 1 of the scope of patent application, wherein the wall surface of the housing (11) enclosing the assembly chamber (14) forms a pivoting portion (19A), and the pivoting portion (19A) receives the blocking member A curved end (52) of the (50), and the other end of the blocking member (50) forms a tip (51) for blocking the tooth (31). As for the belt changing device described in item 3 of the scope of patent application, wherein the blocking member (50) protrudes a cylinder (53) along the axial direction of the curved end (52); the pivot part (19A) is divided into Two parts: a semicircular groove for receiving the curved end (52) of the blocking member (50), and a circular groove for limiting the rotation of the cylinder (53). The belt changing device according to the first item of the patent application, wherein the assembly chamber (14) of the casing (11) has an elastic member (54), and the elastic member (54) provides the blocking member (50) facing the gear (30) The force required for movement. The belt changing device described in item 5 of the scope of the patent application further includes a release button (40) with a coaxially extending shaft portion (42) and an eccentric section (43), and the shaft portion (42) is inserted into the housing A shaft hole (17) of (11), the support release button (40) is located outside the housing (11) and is rotatable, the eccentric section (43) enters the assembly chamber (14) and cooperates with the elastic member (54) to touch the blocking member (50) Both sides. The belt changing device described in item 6 of the scope of patent application, wherein the eccentric section (43) forms an internal threaded hole (46), and a different thickness is formed from the outer surface of the eccentric section (43) to the internal threaded hole (46) The thick part (44) and a thin part (45), two side faces (47) respectively connect the thick part (44) to the thin part (45); a stud (24) passes through the closure (20) and is locked In the internal threaded hole (46) of the eccentric section (43), one of the two side surfaces (47) abuts against the blocking member (50). A bundling tool including: A hand puller (60); a reeling shaft (66) is arranged on the hand puller (60) to wind the tape; a scroll spring (67) is arranged on the hand puller (60) to drive the reeling shaft (66) Rotation; and a belt changing device (10) as described in any one of items 1 to 7 of the scope of the patent application (10) is configured on the hand puller (60), and the force applying portion (33) is combined with the winding shaft ( 66), the gear (30) is blocked by the blocking member (50), and the gear (30) counteracts the torque of the winding shaft (66) provided by the scroll spring (67). A binding tool, comprising: a sub-frame (70) connected to a hand puller (60); a winding shaft (76) arranged on the sub-frame (70) and capable of winding a belt; a scroll spring arranged on the sub-frame (70) ) To drive the rewinding shaft (76) to rotate; and a belt changing device (10) as described in any one of items 1 to 7 of the scope of the patent application is arranged on the sub-frame (70), and the force applying portion (33) Combined with the winding shaft (76), the gear (30) is blocked by the blocking member (50), and the gear (30) counterbalances the torque provided by the winding shaft (76) by the scroll spring.

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