TWI717949B - Pliers - Google Patents

Abstract

The invention discloses a pair of pliers including two bodies and a bolt and a nut for combining the two bodies. The bolt passes through where the two bodies intersect and overlap, and is then fastened by the nut. The nut has a circular bevel, the bolt has a tail that forms a blocking portion to block the circular bevel, to stop the nut from falling back, to prevent the nut from coming off the bolt.

Description

Cutting pliers

The present invention relates to the pivoting structure of hand tools such as scissors and pliers, and particularly refers to a cutting pliers with a novel pivoting structure.

For a long time, the pivoting structure of hand tools such as scissors and pliers has generally adopted two combined methods, one is riveting and the other is screwing. Figures 5 and 6 show a sheet metal scissors assembled by riveting, and its two pliers bodies 11 and 12 are crossed and pivoted together. The pliers body 11 has a pliers portion 111, a grip 112 and a connecting block 113 between the pliers portion 111 and the grip 112. Similarly, the pliers body 12 also has a pliers portion 121, a grip 122 and a connecting block 123 between the pliers portion 121 and the grip 122. The two pliers 111 and 121 each have a blade 114 and 124, and the two blades 114 and 124 form a cutting blade capable of cutting iron sheets. A spring 13 is provided between the handles 112 and 122. The two connecting blocks 113 and 123 each have a through hole 115 and 125, and a bolt 14 passes through the two through holes 115 and 125. One end of the bolt 14 forms a head 141 with a diameter larger than one of the through holes 115, and the other end of the bolt 14 is riveted after passing through the two through holes 115 and 125 to form a tail 142 with a diameter larger than the other through hole 125. So far, the combination of the two clamp bodies 11 is completed.

However, the conventional hand tools such as scissors or pliers combined by riveting method will be strongly pressed during riveting, which makes the two overlapping blocks 113 and 123 become tight, resulting in The opening and closing operations of the two grips 112, 122 are quite laborious, so after the combination, the two grips 112, 122 need to be repeatedly driven by the machine to perform opening and closing operations to loosen the two transfer blocks 113, 123 to achieve two grips. The purpose of opening and closing 112 and 122 is to save effort. In short, this combination of conventional hand tools requires additional gripping. The operation of opening and closing is quite a waste of time, which increases manufacturing costs and needs to be improved.

As for conventional hand tools such as scissors or pliers that are combined by screwing methods, a bolt and a nut are used to replace the bolt 14 mentioned above. However, the easy loosening of the bolts and nuts is a long-standing problem of such conventional hand tools.

The present invention provides a cutting pliers, which has a new pivot structure and can solve the above-mentioned problems of the conventional cutting pliers. In more detail, the cutting pliers of the present invention includes two pliers bodies and the pivot structure. Each pliers body has a pliers part, a grip and a connecting block located between the pliers part and the grip. The two connecting blocks are superimposed and each has a through hole. The pivot structure includes a bolt and a nut. The bolt has a screw head, a screw tail, and a thread section between the screw head and the screw tail. The diameter of the screw head is larger than the through hole of the two connecting blocks. The threaded section and the screw tail pass through the through holes of the two connecting blocks. The nut has a screw hole, and the screw hole is screwed to the threaded section of the bolt. It is characterized in that: the nut has an annular inclined surface, the annular inclined surface surrounds an opening of the screw hole, the screw tail of the bolt passes through the opening of the screw hole and is riveted to form a stopper, the stopper The annular inclined surface blocking the nut.

In one embodiment, an adjustment margin is reserved between the blocking portion of the above-mentioned bolt of the present invention and another connecting block, so that the nut can be positioned along the threaded section between the blocking portion and the other connecting block Adjustment.

In one embodiment, the above-mentioned nut of the present invention has two notches that face each other across the opening.

壓形成一擋部擋於該螺母的該環形斜面，此能阻止該螺母往後鬆退，並避免該螺母脫離螺栓。故本發明可藉其樞接結構解決先前技術所提及的 問題。 Compared with the prior art, the two pliers body of the present invention uses a screw connection method when assembling, so the two pliers body can be maintained at a predetermined tightness without being over-tightened, thereby eliminating the need for a machine to perform the grip opening and closing operations. The purpose of saving manufacturing time and cost. Furthermore, the bolt of the present invention is used at the end of the bolt after the two clamp bodies are combined.

A stopper is formed to block the annular slope of the nut, which can prevent the nut from loosening back and prevent the nut from falling off the bolt. Therefore, the present invention can solve the problems mentioned in the prior art through its pivot structure.

11, 12, 21, 22: clamp body

111, 121, 211, 221: forceps

112, 122, 212, 222: grip

113, 123, 213, 223: transfer block

114, 124, 214, 224: blade

115, 125, 215, 225: through holes

13: Spring

14: bolt

141: Head

142: Tail

3: Bolt

31: Screw head

32: thread section

33: snail tail

331: Block

4: nut

41: screw hole

42: circular slope

43: missing slot

Figure 1 shows a perspective view of the scissors of the present invention.

Figure 2 shows a perspective exploded view of the scissors of the present invention.

Figure 3 shows a partial cross-sectional view of the cutting pliers of the present invention (before riveting).

Figure 4 shows a partial cross-sectional view of the cutting pliers of the present invention (after riveting).

Figure 5 shows a perspective view of conventional hand tools such as scissors or pliers.

Figure 6 shows a partial cross-sectional view of conventional hand tools such as scissors or pliers.

FIG. 1 shows a preferred embodiment of the pliers of the present invention, which includes two pliers bodies 21 and 22, a bolt 3, and a nut 4. Preferably, a spring 5 and a buckle ring 6 are further included, but neither of these is necessary.

As shown in FIG. 2, one of the pliers body 21 has a pliers portion 211, a grip 212, and a connecting block 213 between the pliers portion 211 and the grip 212. The other pliers body 22 also has a pliers portion 221, a grip 222, and a connecting block 223 between the pliers portion 221 and the grip 222. The two pliers portions 211 and 221 each have a blade 214 and 224, and the two blades 214 and 224 form a cutting blade capable of cutting iron sheets (in this case, the cutting pliers is a sheet iron scissors).

As shown in FIGS. 2 and 3, the transfer blocks 213 and 223 are overlapped and each has a through hole 215 and 225. The bolt 3 and the nut 4 constitute the pivoting structure of the pliers of the present invention, wherein the bolt 3 has a screw head 31, a screw tail 33, and a threaded section 32 between the screw head 31 and the screw tail 33. The diameter of the screw head 31 is larger than the through holes 215 and 225 of the two connecting blocks 213 and 223. The nut 4 has a screw hole 41 and an annular inclined surface 42. The annular inclined surface 42 surrounds an opening of the screw hole 41. As shown in FIG. 3, the threaded section 32 is threaded with the nut 4 after passing through the through holes 225 and 215, and the screw tail 33 slightly protrudes from the nut 4 at this time. As shown in Figure 4, the screw tail 33 is also riveted to form a stop 331, which is blocked by the annular oblique of the nut 4. The surface 42 can prevent the nut 4 from loosening back and prevent the nut 4 from separating from the bolt 3.

Since the two pliers bodies 21, 22 are first assembled by the bolt 3 and the nut 4, the position of the nut 4 can be screwed to a predetermined position of the bolt 3. At this predetermined position, the two pliers bodies 21, 22 The transfer blocks 213 and 223 are not forced to be tight but maintain a predetermined tightness, so that the two grips 212 can be opened and closed easily. During the riveting process, it is mainly to expand the screw tail 33 of the bolt 3 to form a stop 331. During the riveting process, the nut 4 is still in the predetermined position, which means that the nut 4 has not been removed due to riveting. The transfer block 213 is pressed to keep the predetermined tightness between the two transfer blocks 213 and 223. In addition, an adjustment margin can be reserved between the stopper 331 and the transfer block 213, so that the nut 4 can be slightly adjusted up and down between the stopper 331 and the transfer block 213, that is, turning the nut 4 can It is moved up and down along the threaded section 32 to tighten or loosen the two connecting blocks 213 and 223.

As shown in FIG. 2 again, the nut 4 has two opposite grooves 43 for inserting a U-shaped flat head (not shown in the figure) of a tool, so that the nut 4 can be rotated by turning the tool.

In addition, the blades 214, 224 on the two jaws 211, 221 are not necessary. For example, they can be changed into two teeth to form a clamp that can clamp a part. In this case, each tooth has a number of Straight convex teeth (not shown in the figure) are arranged at intervals.

2: Easy-to-unlock pipe wrench

21: The first clamp body

211: First Clamp

212: The first grip

22: The second clamp body

221: second clamp

222: second grip

23: Acting Department

24: cogging

25: tooth block

26: control parts

Claims (3)

A cutting pliers comprising: two pliers bodies, each pliers body has a pliers part, a grip, and a connecting block between the pliers part and the grip, the two connecting blocks are superimposed and each has a through hole ; And a bolt having a screw head, a screw tail, and a threaded section between the screw head and the screw tail, the diameter of the screw head is larger than the through hole of the two connecting blocks, the threaded section and the screw tail pass The through hole of the two connecting blocks; a nut with a screw hole that is screwed to the threaded section of the bolt; characterized in that: the nut has an annular bevel, and the annular bevel surrounds a hole of the screw hole The screw tail of the bolt passes through the hole of the screw hole and is riveted to form a stopper, and the stopper blocks the annular slope of the nut. The pliers according to claim 1, wherein an adjustment margin is reserved between the blocking portion of the bolt and the other connecting block, so that the nut can follow the thread between the blocking portion and the other connecting block Adjust the position of the segment. The pliers according to claim 1 or 2, wherein the nut has two notches facing each other across the opening.

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