A positioning device for drilling holes in leisure chair elbows

Abstract

A positioning device for drilling holes in curved pipes of leisure chairs, comprising a base, at least two fixing frames arranged on the base, the fixing frames being slidably connected to the base and at least one fixing member being installed on the main body of each fixing frame, the fixing member comprising a first fixing plate, a first connecting frame installed on the first fixing plate, and a first connecting portion and a second connecting portion respectively hinged to the first connecting frame, the first connecting portion being hinged to an end different from the end hinged to the first connecting frame and the second connecting portion being hinged to an end different from the end hinged to the first connecting frame. The device is adjustable for the fixed position of the curved pipe, has strong applicability, and accurately locates the position of the holes to be punched in the curved pipe, solving the problems of easy deviation of the hole position on the curved pipe and easy deformation of the hole.

Description

Technical Field

[0001] The invention belongs to the technical field of leisure chair pipe processing equipment, and in particular relates to a positioning device used for drilling a leisure chair bent pipe. Background Art

[0002] Chairs are the most frequently used furniture, but most of the existing chairs are plastic and wooden chairs. Plastic chairs have poor firmness and plastic products are very easy to pollute the natural environment. Although the firmness of wooden chairs has been enhanced, wooden seats use a lot of materials and are wasteful, and cannot be recycled and repaired. Therefore, metal chairs account for an increasingly important proportion, and because metal chairs have beautiful metallic luster, anti-corrosion, and anti-cracking characteristics, they are becoming more and more popular with the public. As consumers in the market have an increasing demand for aesthetics, the shape of leisure chairs has become very varied. Therefore, curved pipes with a certain arc are often used for assembly and welding, so it is often necessary to punch holes in the curved pipes. The currently commonly used processing method is to punch holes in the straight pipes and then bend them, but this processing process often causes the problem of deformation of the holes when bending the pipes, which affects assembly and welding. Therefore, the applicant has proposed a process of bending the pipes first and then punching holes.

[0003] The document with authorization number CN106624895B discloses a drilling fixture for special-shaped bent pipes, including a base, a mounting plate is arranged on the base, a plurality of criss-crossing slide grooves are arranged on the mounting plate, the bottom end of a support platform is installed in a slide groove, a drilling mechanism is fixed on the support platform, a bent pipe positioning structure and a locking mechanism for fixing the bent pipe are arranged on the support platform, and a protective layer is arranged in the bent pipe positioning structure; a first fixed platform is installed in the slide groove through a second sliding mechanism, and a first fixing mechanism is arranged on the first fixed platform; a second fixed platform is installed in the slide groove through a third sliding mechanism, and a second fixing mechanism is arranged on the second fixed platform; a convex strip is arranged on the mounting plate near the support platform, and a scale is arranged on the convex strip; the present invention realizes drilling of bent pipes of different shapes and sizes, and can also drill holes at different positions of the bent pipe, and avoids damage to the surface of the special-shaped bent pipe and deformation of the bent pipe during drilling, thereby greatly reducing the product scrap rate and cost. However, the bent pipes used in leisure chairs are thinner, so the positioning needs to be more precise, and the shapes of the bent pipes that need to be punched in leisure chairs are more varied, and may be three-dimensional structures. Therefore, the above solution is not suitable for the punching process of the bent pipes of leisure chairs. Summary of the invention

[0004] In view of the above-mentioned problems, the purpose of the present invention is to provide a positioning device for drilling holes in bent pipes of leisure chairs, which has adjustable fixed positions for the bent pipes, strong applicability, and accurate positioning of the holes in the bent pipes, thus solving the problems of deviations in the hole positions on the bent pipes and deformation of the holes.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A positioning device for drilling bent pipes of leisure chairs, comprising a base and at least two fixing frames arranged on the base, wherein the fixing frames can be slidably connected to the base and at least one fixing member is installed on the main body of each fixing frame, and the fixing member comprises a first fixing plate, a first connecting frame installed on the first fixing plate, and a first connecting part and a second connecting part respectively hinged to the first connecting frame, the first connecting part is hinged to an end different from the end hinged to the first connecting frame and the second connecting part is hinged to an end different from the end hinged to the first connecting frame.

[0007] In the design of this scheme, the slidable connection of the fixing frame enables the device to fix different bent pipes for punching holes, and the three-level hinged structure of the fixing piece enables the fixing piece to accurately fix the bent pipe without the assistance of other fixing parts, thereby preventing the bent pipe from loosening; and the fixing and releasing of the fixing piece is also simple and easy to implement, thereby improving the flexibility of the device.

[0008] As a further preferred embodiment of the present invention, the first connecting part includes a first hinged part and a first fixed part connected to the first hinged part, and the second connecting part includes a second hinged part, a second fixed part, and a second handle connected in sequence; one end of the first hinged part is hinged to the first connecting frame, and the other end is hinged to one end of the second hinged part; the second hinged part is hinged to the first connecting frame through a hinge at an end different from the end hinged to the first hinged part.

[0009] As a further preferred embodiment of the present invention, a sliding groove is provided on the first fixing portion, a clamping member is slidably connected in the sliding groove, and the clamping member includes a stud passing through the sliding groove, a fixing clip sleeved on the stud, and a fixing nut for fixing the fixing clip.

[0010] In the design of this solution, the clamping member on the first fixing part is adjustable, which further improves the adaptability of the fixing member to elbows of different specifications, making the device more flexible and adaptable.

[0011] As a further preferred embodiment of the present invention, the first connection portion takes a hinged portion where the first connection portion is hinged with the first connection frame as a circle center, and a rotation angle of the first connection portion is 0-90°.

[0012] As a further preferred embodiment of the present invention, the first connecting frame includes a first peak portion hinged to one end of the first hinge portion and a second peak portion hinged to the hinge member, and a fixed valley portion is formed between the first peak portion and the second peak portion.

[0013] In the design of this solution, the special shape design of the first connecting frame further strengthens the state maintenance of the fixing member in the 0° and 90° states, so that the fixing member will not change easily in the above two states.

[0014] As a further preferred embodiment of the present invention, the connection portion of the second hinged portion where it is hinged with the first hinged portion engages with the fixed valley portion when the rotation angle of the first hinged portion is 0°. This solution further enhances the stability of the fixing member at 0°.

[0015] As a further preferred embodiment of the present invention, a fixing groove is provided on the second fixing portion, and one side of the first hinged portion engages with the fixing groove when the first connecting portion rotates at an angle of 0°. This solution further enhances the stability of the fixing member at 0°.

[0016] As a further preferred embodiment of the present invention, an auxiliary component is hinged on the second peak portion, and the auxiliary component includes an auxiliary body, a first auxiliary block and a second auxiliary block respectively arranged on the auxiliary body and respectively abutting against the lower surface of the second handle.

[0017] As a further preferred embodiment of the present invention, an auxiliary card slot adapted to the first auxiliary block is opened on the main body, and the first auxiliary block includes an auxiliary fixing plate embedded in the auxiliary card slot and an abutment block connected to the auxiliary fixing plate and protruding from the auxiliary card slot.

[0018] In the design of this scheme, since the contact area between the second handle and the second peak is very small, the contact part between the two will wear out very quickly during long-term use, which will affect the horizontal state of the first fixing part and cause instability in the clamping of the bent pipe. Therefore, in actual use, the fixing parts need to be replaced frequently, which increases the economic and time costs. On this basis, the applicant hinges an auxiliary part at the second peak to reduce the wear of the part where the second handle contacts the second peak. The specific structure is as shown above. The design of the first auxiliary block and the second auxiliary block comprehensively increases the contact area between the auxiliary part and the second handle, so it has the effect of equivalent unloading force, protects the second peak and also reduces the wear of the auxiliary part itself. The detachable design of the first auxiliary block only requires the first auxiliary block to be removed and replaced with a new one after the first auxiliary block directly abutting the second handle is worn, which further reduces the cost of parts replacement. In the design of this scheme, the second auxiliary block is an elastic part, which plays a buffering role. At the same time, in this scheme, the bottom surface of the auxiliary slot 218a2 can also be bonded with the same elastic layer to buffer the first auxiliary block and further reduce wear.

[0019] As a further preferred embodiment of the present invention, an elastic fixing block is installed at one end of the stud close to the first fixing plate.

[0020] As a further preferred embodiment of the present invention, the fixing frame also includes a sliding block connected to the main body, one end of the main body is embedded in a motion groove opened on the base, the sliding block is located at the upper end of the motion groove and the sliding block abuts against the upper surface of the base; the sliding block is provided with a fixing screw hole corresponding to the positioning screw hole opened on the base.

[0021] As a further preferred embodiment of the present invention, a marking band matching the corresponding screw hole is provided on the base.

[0022] In summary, the present invention has the following beneficial effects:

[0023] In the design of this scheme, the fixing frame for fixing the bent pipe is adjustable and the adjustment distance is clear, which is convenient for the staff to operate; on this basis, the fixing parts on the fixing frame can also be adjusted to the fixing position of the bent pipe, further enhancing the adaptability of the device; and the fixing parts can accurately fix the bent pipe without the assistance of external parts through the three-level hinged structure, which is simple to operate and has a good fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 It is a schematic diagram of the structure of the present invention.

[0025] Attached Figure 2 This is a 90-degree front view of the fixing member of the present invention.

[0026] Attached Figure 3 It is a 0 degree front view of the fixing member of the present invention.

[0027] Attached Figure 4 It is a top view of the fixing member of the present invention.

[0028] Attached Figure 5 It is a schematic structural diagram of the auxiliary component of the present invention.

[0029] Attached Figure 6 It is a schematic diagram of the connection structure of the first auxiliary block of the present invention.

[0030] Description of the drawings: base 1, motion groove 11, positioning screw hole 12, positioning block 13, marking tape 14, fixing frame 2, main body 20, fixing member 21, first fixing plate 211, screw hole 211a, first connecting frame 212, first peak 212a, fixing valley 212b, second peak 212c, first connecting portion 213, first hinged portion 213a, first fixing portion 213b, sliding groove 213b1, second connecting portion 214, second hinged portion 214a, second fixing portion 214b, fixing groove 21 4b1, second handle 214c, clamping member 215, fixing clip 215a, stud 215b, elastic fixing block 215b1, fixing nut 215c, hinge 216, hinge bolt 217, auxiliary member 218, auxiliary body 218a, connecting hole 218a1, auxiliary card slot 218a2, elastic layer 218a3, first auxiliary block 218b, auxiliary fixing plate 218b1, abutment block 218b2, second auxiliary block 218c, sliding block 22, fixing screw hole 221, positioning unit 3. DETAILED DESCRIPTION

[0031] Example 1

[0032] As attached Figure 1 As shown, the present embodiment provides a positioning device for drilling holes in a leisure chair elbow, comprising a rectangular

[0033] A base 1, the specification of the base 1 in this embodiment is 80cm*60cm*8cm, a motion groove 11 is provided on the base 1, the specification of the motion groove 11 is 70cm*10cm*5cm, two fixing frames 2 are placed in the motion groove 11, and the specification of the main body 20 of each fixing frame 2 is 9.5cm*9.5cm*50cm. After the main body 20 is embedded in the motion groove 11, two symmetrical sliding blocks 22 are installed on the column wall of the main body 20, and the two sliding blocks 22 extending from the main body 20 fix the lower end of the main body 20 in the motion groove 11, and each sliding block 22 is provided with a fixing screw hole 221. Positioning screw holes 12 corresponding to the fixing screw holes 211 are correspondingly arranged on both sides of the motion groove 11 along the direction of the motion groove 11 on the base 1. When fixing is required, a bolt with matching size is inserted into the fixing screw hole 211 and the corresponding positioning screw hole 12. In this embodiment, the number of the positioning screw holes 12 on each side is 7. When the size of the bent pipe is different, the positions of the two fixing frames 2 in the motion groove 11 can be adjusted. In order to make the fixing frame 2 position the bent pipe more accurately, a marking band 14 with scales matching the positioning screw holes 12 is provided on one side of the motion groove 11 in this embodiment. In this embodiment, two fixing members 21 vertically distributed on the main body 20 are installed on each fixing frame 2. Each fixing member 21 includes a first fixing plate 211 with a screw hole 211a and a first connecting frame 212 welded to the first fixing plate 211. The first connecting frame 212 is composed of two identical metal plates. The lower ends of the first connecting portion 213 and the second connecting portion 214 are installed in the cavity formed by the two metal plates. In this embodiment, each metal plate of the first connecting frame 212 is in a "double-peaked" shape, and is divided into a first peak portion 212a, a fixed valley portion 212b, and a second peak portion 212c according to the position. The first peak portion 212a is the connection point of the first connecting portion 213, and the second peak portion 212c is the connection point of the second connecting portion 214. Therefore, according to the functional division: the first connecting portion 213 is divided into a first hinged portion 213a and a first fixed portion 213b; the second connecting portion 214 is divided into a second hinged portion 214a, a second fixed portion 214b, and a second handle 214c; the first hinged portion 213a is located in the cavity formed by the two first peak portions 212a. In the embodiment, the two side surfaces of the first hinged portion 213a are hinged to the first peaks 212a of the two metal plates. Similarly, the two side surfaces of the second hinged portion 214a are respectively hinged to the two hinged parts 216. One end of each hinged part 216 is hinged to the second peak 212c of each metal plate. At the same time, one end of the first hinged portion 213a different from the first peak 212a is hinged to one end of the second hinged portion 214a different from the second peak 212c, and the second hinged portion 214a is located at the outer end of the first hinged portion 213a. The above-mentioned hinged methods are all completed by the hinge bolts 217. The hinge bolts 217 are commonly used hinged parts, so they are not repeated here.

[0034] As attached Figure 2 As shown, in this embodiment, the side of the first hinged portion 213a is a right-angled trapezoid, and the right-angled portion is located at one end close to the fixed valley portion 212b, the side of the first fixed portion 213b is a long strip, the first hinged portion 213a and the first fixed portion 213b are integrally formed, and the first fixed portion 213b is provided with a sliding groove 213b1 having a length equivalent to that of the first fixed portion 213b, and a movable clamping member 215 is installed in the sliding groove 213b1, and the clamping member 215 includes a stud 213a passing through the sliding groove 213b1. 15b, a fixing clip 215a which is sleeved on the stud 215b and is used to fix the two ends of the fixing stud 215b on the sliding groove 213b1, and a fixing nut 215c which is used to fix the fixing clip 215a. An elastic fixing block 215b1 is installed at one end of the stud 215b to abut against the bent pipe. When the position of the clamping member 215 needs to be adjusted, the stud 215b is moved to an appropriate position, and the fixing nut 215c is tightened to fix the fixing clip 215a on the first fixing portion 213b.

[0035] As attached Figure 3~4 As shown, in this embodiment, the first hinged portion 213a is centered on the hinge bolt 217 hinged to the first peak portion 212a, and the rotation angle is 0-90°, and the first fixed portion 213b is in a vertical direction when the rotation angle is 0°, and in a horizontal direction when the rotation angle is 90°. The above solution is mainly achieved by the special design of the second hinged portion 214a: the end of the second hinged portion 214a hinged to the first hinged portion 213a is an arc shape that matches the shape of the fixed valley portion 212b, and When the rotation angle is 0°, the end is completely embedded in the fixed valley 212b, and the hinge 216 is in a vertical state under the joint action of the second hinge 214a and the second peak 212c; when the rotation angle is 0°, the optimized design of this embodiment is that in order to reduce the mutual squeezing of the first hinge 213a and the second hinge 214a and save installation space, the second fixed portion 214b is provided with a fixed groove 214b1 in which the right angle portion of the first hinge 213a is embedded. In order to save the force of the staff, the second handle 214c is a long handle.

[0036] The working principle of this embodiment is: first, determine the relative position of the two fixing frames 2 on the base 1 and the relative position of the fixing member 2 on the fixing frame body 20 according to the bent pipe to be processed, and at this time, each fixing member 2 is in the 0° state; when the position confirmation is completed, press the second handle 214c, the first fixing part 214b is in the 90° state, and the clamping member 215 clamps the bent pipe, and then use the punching device to punch holes in the bent pipe. The advantages of this embodiment are high adjustability, strong adaptability, and easy disassembly and assembly. The advantage of this embodiment is that the structural design of the fixing member 21 saves space, and when in the 90° state, the first fixing portion 213b can accurately fix the elbow without applying an extra fixing force. Specifically, when in the 0° state, the right angle of the first hinged portion 213a is embedded in the fixing groove 214b1. At this time, the friction between the first hinged portion 213a and the fixing groove 214b1, the first peak 212a, and the second peak 212c and the first hinged portion 213a, the hinged member 216, and the second hinged portion 214a is very large, so the state will not change without a large external force. When a friction force greater than that generated between the components is applied, the first connecting portion 213 rotates to 90°, at which time the lower surface of the second handle 214c abuts against the surface of the second peak 212c, so the first fixing portion 214b cannot be positioned downward, and in this horizontal position, the second hinged portion 214a and the multi-stage hinged structure of the hinge 216 work together to give the first hinged portion 213a a horizontal force at the hinge with the second hinged portion 214a to prevent the first fixing portion 214b from rotating, so that the horizontal force and the friction force work together to achieve the effect of accurately fixing the bent pipe by the first fixing portion 213b.

[0037] Example 2

[0038] As attached Figures 5 and 6As shown, the difference between this embodiment and embodiment 1 is that an auxiliary member 218 is additionally provided at the hinged joint between the second peak 212c of each first connecting frame 212 and the hinge 216, the auxiliary body 218a of the auxiliary member 218 is U-shaped, and the two ends of the U-shape are respectively provided with connecting holes 218a1, and the same hinge bolt 217 for fixing the second peak 212c and the hinge 216 passes through the connecting hole 218a1 to hinge the auxiliary body 218a to the outer side of the second peak 212c, and two auxiliary card grooves 218a2 are correspondingly provided on the two side surfaces corresponding to the U-shape, and the auxiliary card groove 218a2 is embedded with a first auxiliary block 218b, and the first auxiliary block 218b specifically includes an auxiliary fixing plate 218b1 embedded in the auxiliary card groove 218a2 and an auxiliary fixing plate 218b1 connected to the auxiliary fixing plate 218b1. The plate 218b1 is welded with an abutment block 218b2 that protrudes from the auxiliary card slot 218a2. In the present embodiment, the abutment block 218b2 is preferably a rigid body (made of iron or steel) with a poor arc cross-section. The abutment block 218b2 abuts against the lower surfaces on both sides of the second handle 214c to buffer the force between the second handle 214c and the end of the second peak 212c to reduce wear. Since the abutment block 218b2 has small consumables and is simple to make, it can be replaced when the abutment block 218b2 is worn out. In the present embodiment, a second auxiliary block 218c abutting against the lower surface of the end of the second handle 214c is installed at the bottom surface of the U-shaped auxiliary body 218a. The second auxiliary block 218c is an elastic member (made of elastic rubber) bonded to the auxiliary body 218a for buffering. In this embodiment, in order to further reduce the wear of the abutting block 218b2, an elastic layer 218a3 is bonded to the bottom surface of the auxiliary slot 218a2. The elastic layer is also made of elastic rubber for buffering.

[0039] Example 3

[0040] The difference between this embodiment and embodiment 1 is that there are two moving grooves 11, which are symmetrically opened on the base 1, so each moving groove 11 is provided with two fixing frames 2 that slide in the moving groove 11, and the number and structure of the fixing members 21 provided on each fixing frame 2 are the same as those in embodiment 1; in addition, a positioning unit 3 and a positioning block 13 matching the positioning unit 3 are installed on the base 1 and located in the middle of the two moving grooves 11. The positioning unit 3 is a transverse fixing clamp structure known in the art and will not be described in detail. The transverse fixing clamp and the positioning block 13 work together to clamp and fix the middle part of the bent pipe, and further fix and position the processed bent pipe without interfering with the punching operation.

[0041] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A positioning device for drilling holes in leisure chair elbows, characterized in that: The invention comprises a base (1), at least two fixing frames (2) arranged on the base (1), the fixing frames (2) being slidably connected to the base (1) and at least one fixing member (21) being installed on a main body (20) of each fixing frame (2), the fixing member (21) comprising a first fixing plate (211), a first connecting frame (212) installed on the first fixing plate (211), and a first connecting portion (213) and a second connecting portion (214) respectively hinged to the first connecting frame (212), the first connecting portion (213) being hinged to an end different from that hinged to the first connecting frame (212) and the second connecting portion (214) being hinged to an end different from that hinged to the first connecting frame (212); The first connecting portion (213) comprises a first hinged portion (213a) and a first fixed portion (213b) connected to the first hinged portion (213a); the second connecting portion (214) comprises a second hinged portion (214a), a second fixed portion (214b), and a second handle (214c) connected in sequence; one end of the first hinged portion (213a) is hinged to the first connecting frame (212), and the other end is hinged to one end of the second hinged portion (214a); the end of the second hinged portion (214a) different from the end hinged to the first hinged portion (213a) is hinged to the first connecting frame (212) via a hinge (216); The first fixing portion (213b) is provided with a sliding groove (213b1), a clamping member (215) is slidably connected in the sliding groove (213b1), and the clamping member (215) comprises a stud (215b) passing through the sliding groove (213b1), a fixing clip (215a) sleeved on the stud (215b), and a fixing nut (215c) for fixing the fixing clip (215a); The first connecting portion (213) takes the hinged portion where it is hinged to the first connecting frame (212) as the center of a circle, the rotation angle of the first connecting portion (213) is 0-90 degrees, the first connecting frame (212) comprises a first peak portion (212a) hinged to one end of the first hinged portion (213a), and a second peak portion (212c) hinged to the hinge member (216), and a fixed valley portion (212b) is formed between the first peak portion (212a) and the second peak portion (212c); The connection portion of the second hinged portion (214a) where it is hinged with the first hinged portion (213a) engages with the fixed valley portion (212b) when the rotation angle of the first connection portion (213) is 0°, and a fixing groove (214b1) is provided on the second fixing portion (214b), and one side of the first hinged portion (213a) engages with the fixing groove (214b1) when the rotation angle of the first connection portion (213) is 0°; An auxiliary component (218) is hinged on the second peak portion (212c), and the auxiliary component (218) includes an auxiliary body (218a), a first auxiliary block (218b) and a second auxiliary block (218c) respectively arranged on the auxiliary body (218a) and respectively abutting against the lower surface of the second handle (214c), and the auxiliary body (218a) is provided with an auxiliary slot (218a2) adapted to the first auxiliary block (218b), and the first auxiliary block (218b) includes an auxiliary fixing plate (218b1) embedded in the auxiliary slot (218a2) and an abutting block (218b2) connected to the auxiliary fixing plate (218b1) and protruding from the auxiliary slot (218a2).

2. A positioning device for drilling a leisure chair elbow according to claim 1, characterized in that: The fixing frame (2) further comprises a sliding block (22) connected to the main body (20), and the sliding block (22) is provided with a fixing screw hole (221) corresponding to the positioning screw hole (12) provided on the base (1).

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