Guide transmission device for needle detector

Abstract

The utility model provides a guide transmission device for a needle detector, which comprises a rack, two ends of the rack are respectively provided with a driving roller, and the driving rollers at the two ends of the rack are connected through a conveyor belt; each transmission roller comprises an inner roller, the outer circumferential face of each inner roller is wrapped with a polyurethane anti-static layer, guide grooves are formed in the polyurethane anti-static layers, and the guide grooves are arranged around the axis of the inner rollers. A guide strip is arranged on the inner ring surface of the conveying belt in the inner ring direction of the conveying belt, the guide strip is arranged in the guide groove, and the section shape of the guide strip is matched with that of the guide groove; and more than two longitudinal frames are further arranged in the rack and located on the two sides of the conveying belt respectively, more than two tensioning rollers are arranged between the longitudinal frames through bearing mechanisms, and the tensioning rollers are parallel to the transmission rollers. The technical problems that in the prior art, too many deviation rectifying devices exist, load bearing is difficult, and static hidden dangers exist are solved.

Description

Technical Field

[0001] The utility model relates to the field of physics, in particular to metal detection technology, and especially to a detection device for metal foreign objects in textiles, specifically a guiding and conveying device for a needle detector. Background Art

[0002] In the textile industry, needle detectors are generally used to detect metal foreign objects such as broken needles in textiles. During the needle detection process, a conveyor belt-like conveying device is needed to transfer the textiles to the entrance of the needle detector.

[0003] In the prior art, the conveying devices for needle detectors have the following problems:

[0004] 1. Since the upper and lower detection devices of the needle detector are highly sensitive, if an ordinary conveyor belt is too close to the lower detection device of the needle detector, it will frequently trigger an alarm due to the metal substances in the structure or on the surface of the ordinary conveyor belt itself, affecting the normal detection process.

[0005] 2. When a large box body is carried on the conveying device, it is difficult for an ordinary conveyor belt to bear the weight, resulting in difficult conveying.

[0006] 3. A large amount of static electricity will be generated when the conveyor belt rubs against surrounding objects, posing a safety hazard.

[0007] 4. A deviation correction mechanism also needs to be set on the conveyor belt-like conveying device to prevent the conveyor belt from running off track. Specifically, a deviation correction wheel device or a deviation correction baffle is installed on the edge of the conveyor belt to avoid the conveyor belt from running off track. During installation, it is necessary to first adjust the adjustment screws corresponding to the four corners of the conveyor belt to make the conveyor belt run normally without running off track, and then install the deviation correction device on the two parallel and symmetric edges of the conveyor belt so that the conveyor belt is stuck inside the deviation correction device, thereby preventing the conveyor belt from running off track. However, when applied to a wide-width needle detector, due to the large detection space of the wide-width needle detector, multiple conveyor belts are required on the conveying device to synchronously move and convey items for detection. Each conveyor belt needs to be installed with a set of deviation correction devices, which not only has a high cost, but also takes a long time to adjust, seriously affecting the installation and commissioning efficiency. Summary of the Invention

[0008] The purpose of the utility model is to provide a guiding and conveying device for a needle detector, and the guiding and conveying device for a needle detector is to solve the technical problems of difficult load-bearing, static electricity hidden danger, frequent triggering of false alarms, and the requirement of installing more deviation correction devices for a wide-width needle detector in the prior art for the conveying device of a needle detector.

[0009] A guiding and transporting device for a needle detector, comprising a frame. At both ends of the frame, a driving roller is respectively arranged, and the driving rollers at both ends of the frame are connected by more than two mutually parallel conveyor belts; any one of the driving rollers respectively includes an inner roller, and a polyurethane anti-static layer is wrapped on the outer circumferential surface of the inner roller. More than one guiding groove is opened on the polyurethane anti-static layer, and any one of the guiding grooves is arranged around the axis of the inner roller; a guiding strip is arranged on the inner circumferential surface of the conveyor belt, the guiding strip is arranged along the inner circumferential direction of the conveyor belt, and the guiding strip is placed in the guiding groove, and the cross-sectional shape of the guiding strip matches the cross-sectional shape of the guiding groove; more than two longitudinal frames are further arranged in the frame, the longitudinal frames are perpendicular to the axial direction of the driving roller and are respectively located on both sides of the conveyor belt, and more than two tension rollers are arranged between the longitudinal frames through bearing mechanisms, the tension rollers are all parallel to the driving roller, and in the radial cross-section of the tension rollers, at least a part of the tension rollers is located above a common external tangent of the two driving rollers and contacts the outer circumferential surface below the conveyor belt.

[0010] Further, a transmission table is horizontally arranged in the middle, and the transmission table is located in the inner circle of the conveyor belt.

[0011] Further, the guiding groove is a V-shaped or trapezoidal groove, and the cross-sectional shape of the guiding strip matches the cross-sectional shape of the guiding groove.

[0012] Beneficial effects

[0013] Compared with the prior art, the effects of the present utility model are positive and obvious:

[0014] 1. The deviation correction effect is realized through the guiding groove on the driving roller and the guiding strip on the conveyor belt.

[0015] 2. The bottom of the conveyor belt is lifted by the tension roller, so that a gap is left between the conveyor belt and the lower detection device of the needle detector to avoid false alarms.

[0016] 3. A better load-bearing effect is realized through the transmission table.

[0017] 4. The anti-static effect is realized through the polyurethane layer wrapped outside the conveying roller. Description of the drawings

[0018] Figure 1 . Structural schematic diagram of the embodiment.

[0019] Figure 2 . Schematic diagram of the cooperation between the transmission device and the needle detector in the embodiment.

[0020] Figure 3 . Schematic diagram of the cooperation between the driving roller and the conveyor belt in the embodiment.

[0021] Figure 4 . Side sectional view of the drive roller in the embodiment.

[0022] Figure 5 . Side sectional view of the crawler belt in the embodiment.

[0023] In the figure: 1 frame; 101 longitudinal frame; 2 drive roller; 201 inner roller; 202 polyurethane anti-static layer; 203 guide groove; 3 conveyor belt; 301 guide strip; 4 tension roller; 5 transfer tabletop; 6 drive device; 7 needle detector; 701 upper detection device; 702 lower detection device. Detailed implementation manners

[0024] The following embodiments will further illustrate the present utility model, but do not limit the present utility model thereby.

[0025] Embodiment

[0026] As Figures 1 to 5 shown, the present utility model provides a guiding and conveying device for a needle detector, including a frame 1. A drive roller 2 is respectively arranged at both ends of the frame 1. The drive roller 2 is connected to the frame 1 through a rotating shaft. Among the two drive rollers 2, one drive roller 2 is a driving roller and the other drive roller 2 is a driven roller. A drive device 6 is installed on the frame 1 beside the driving roller. The drive device 6 includes a motor, and the output shaft of the motor is in transmission connection with the driving roller to provide power for the driving roller.

[0027] It includes four conveyor belts 3. The conveyor belts 3 are all parallel to each other. The drive rollers 2 at both ends of the frame 1 are connected through the conveyor belts 3. The driving wheel drives the driven wheel to rotate through the conveyor belts 3, thereby forming a conveyor belt transmission mechanism to achieve the effect of the conveyor belt 3 driving the items on the conveyor belt to move.

[0028] A transfer tabletop 5 is horizontally and fixedly connected in the frame 1. The transfer tabletop 5 is located inside the conveyor belts 3. The transfer tabletop 5 covers all transfer areas, thereby improving the load-bearing effect of the transferred items.

[0029] Any one of the drive rollers 2 respectively includes an inner roller 201. The inner roller 201 is sleeved and fixed on the roller shaft of the drive roller 2. The inner roller 201 is connected to the frame 1 through the roller shaft. A polyurethane anti-static layer 202 is wrapped on the outer circumferential surface of the inner roller 201. The polyurethane anti-static layer 202 is composed of an anti-static composite material mainly made of polyurethane. The polyurethane anti-static composite material has good electrical conductivity, stability and wear resistance, thereby achieving the anti-static effect and avoiding potential safety hazards caused by static electricity. The polyurethane anti-static composite material is widely used in fields such as electronics, optics, and chemical industry. The anti-static principle will not be elaborated here.

[0030] Four guiding grooves 203 are equidistantly arranged on the polyurethane anti-static layer 202. The guiding grooves 203 are arranged around the axis of the inner roller 201. A guiding strip 301 is longitudinally arranged on the inner circle of any conveyor belt 3. The guiding groove 203 in this embodiment is a trapezoidal groove with the short side facing inward. In other embodiments, it can also be a V-shaped groove. The guiding strip 301 is arranged along the inner circle direction of the conveyor belt 3. The guiding strips 301 are respectively placed into the corresponding guiding grooves 203. The cross-sectional shape of the guiding strip 301 matches the cross-sectional shape of the guiding groove 203. Each guiding strip 301 is mutually engaged with the guiding groove 203 at the corresponding position of the conveyor belt 3, so as to improve the contact area between the guiding groove 203 and the guiding strip 301 while facilitating disassembly, making their cooperation more compact. During the rotation of the driving roller 2, the guiding strip 301 is always located within the guiding groove 203, thereby realizing the deviation rectification effect of the conveyor belt 3.

[0031] Compared with the prior art where deviation rectification devices are individually installed at the edges of the conveyor belt 3, the combined installation of the guiding groove 203 and the guiding strip 301 is convenient and fast, the deviation rectification effect is reliable, the external deviation rectification device is omitted, and it is suitable for use in the transmission device of the wide-width needle detector 7 with multiple conveyor belts 3.

[0032] The frame 1 further includes more than two longitudinal frames 101. The longitudinal frames 101 provide support for the transmission table surface 5, thereby achieving a better load-bearing effect. In addition, the longitudinal frames 101 are also used to install the tensioning rollers 4. The longitudinal frames 101 are perpendicular to the axial direction of the driving roller 2 and are respectively located on both sides of the conveyor belt 3. Two tensioning rollers 4 are arranged between the longitudinal frames 101 through a bearing mechanism. The tensioning rollers 4 are all parallel to the driving roller 2. In the radial cross-section of the tensioning rollers 4, at least a part of the tensioning rollers 4 is located above a common external tangent of the two driving rollers 2 and contacts the outer circumferential surface below the conveyor belt 3. The vertical position of the bearing mechanism on the longitudinal frame 101 can be adjusted. Specifically, the longitudinal frame 101 is provided with a plurality of kidney-shaped hole chutes. Sliders are embedded in the chutes. The bearing mechanism is fixedly connected to the sliders. Thus, the bearing mechanism can vertically move in the chutes following the sliders. The sliders are locking sliders. By tightening the locking nuts, the sliders can be fixed in the chutes, thereby achieving the effect of adjusting and fixing the vertical position of the bearing mechanism in the chutes, and further realizing the adjustment of the height of the tensioning rollers 4. The chutes and the locking sliders are mature prior arts, which can be directly purchased from the market and installed. The structure and principle thereof will not be elaborated here.

[0033] In actual use, the needle detector 7 is arranged in the middle of the frame 1, and the conveyor belt 3 passes through the detection door of the needle detector 7, so that the item to be detected can be driven into the detection door of the needle detector 7 for detection. The upper and lower surfaces inside the detection door of the needle detector 7 are respectively provided with an upper detection device 701 and a lower detection device 702. The upper detection device 701 is far from the conveyor belt 3, but the lower detection device 702 is close to the conveyor belt 3. The metal impurities carried by the conveyor belt 3 itself are easily captured by the lower detection device 702, resulting in false alarms, thus affecting the normal detection work. After the tension roller 4 is lifted upward, the tension roller 4 closely supports the bottom of the conveyor belt 3. It can not only tighten the conveyor belt 3 to improve the transmission efficiency, but also leave a sufficient distance gap between the bottom of the conveyor belt 3 and the lower detection device 702, thus avoiding false alarms and improving the detection accuracy.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guiding and conveying device for a needle detector, characterized in that: It includes a frame (1), and a driving roller (2) is respectively arranged at both ends of the frame (1). The driving rollers (2) at both ends of the frame (1) are connected by more than two mutually parallel conveyor belts (3); Any one of the driving rollers (2) respectively includes an inner roller (201). A polyurethane anti-static layer (202) is wrapped on the outer circumferential surface of the inner roller (201). More than one guiding groove (203) is opened on the polyurethane anti-static layer (202). Any one of the guiding grooves (203) is arranged around the axis of the inner roller (201); A guiding strip (301) is arranged on the inner circumferential surface of the conveyor belt (3). The guiding strip (301) is arranged along the inner circumferential direction of the conveyor belt (3). The guiding strip (301) is placed in the guiding groove (203), and the cross-sectional shape of the guiding strip (301) matches the cross-sectional shape of the guiding groove (203); More than two longitudinal frames (101) are further arranged in the frame (1). The longitudinal frames (101) are perpendicular to the axial direction of the driving roller (2) and are respectively located on both sides of the conveyor belt (3). More than two tension rollers (4) are arranged between the longitudinal frames (101) through bearing mechanisms. The tension rollers (4) are all parallel to the driving roller (2). In the radial cross-section of the tension roller (4), at least a part of the tension roller (4) is located above a common external tangent of the two driving rollers (2) and contacts the outer circumferential surface below the conveyor belt (3).

2. The guiding and transporting device for a needle detector according to claim 1, wherein: A transmission tabletop (5) is horizontally arranged in the frame (1), and the transmission tabletop (5) is located in the inner circle of the conveyor belt (3).

3. The guiding and conveying device for a needle detector according to claim 1, characterized in that: The guiding groove (203) is a V-shaped or trapezoidal groove, and the cross-sectional shape of the guiding strip (301) matches the cross-sectional shape of the guiding groove (203).

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