CN220500262U - Sheet feeding detection device - Google Patents

Abstract

The utility model provides a printed sheet running position detection device which comprises a guide rail and two detection assemblies, wherein the two detection assemblies are arranged on the guide rail in a sliding manner, and a printed sheet conveying channel is formed between the two detection units. The detection assembly includes: base, installation sleeve, support frame, displacement sensor and contact block, installation sleeve set up on the top surface of base, inside the bottom liftable of support frame inserts the installation sleeve, and be equipped with the back shaft at the top of support frame. The displacement sensor is arranged in the mounting sleeve, and a displacement gap exists between the detection end of the displacement sensor and the bottom surface of the support frame. The top surface of the base is also provided with a connecting shaft, one end of the contact block is hinged with the connecting shaft, the other end of the contact block is provided with an arc-shaped contact surface, and the contact block is provided with a containing groove. The sheet feeding detection device can judge whether the sheet feeding problem occurs before the printing work starts, and can flexibly adjust the position of the detection component according to actual requirements.

Description

Sheet feeding detection device

Technical Field

The utility model belongs to the field of printing equipment, and particularly relates to a printing sheet running position detection device.

Background

The printed sheet feeding position is a printing defect caused by deviation between the printed sheet position and a preset position, and when the printed sheet feeding position occurs on a product, the printed patterns on the surface of the product can be overlapped or misplaced, so that the quality of the product can be seriously affected, and unnecessary economic loss is caused.

In the prior art, sheet run detection is typically accomplished by means of image recognition techniques. After the product is printed, the image recognition equipment can acquire the printed pattern on the surface of the product, and then the printed pattern is compared with the normal pattern, so that whether the product has the problem of sheet running or not is judged.

However, the detection method can only detect after the product is printed, and cannot judge before the product is printed, so that defective products appear in the production process, and the actual economic benefit of manufacturers is affected. In addition, the difficulty of carrying out position adjustment after finishing the installation of image recognition equipment is great, and when the specification of printing product changed, staff need consume a large amount of time to dismouting and debugging to image recognition equipment, can't satisfy the demand of in-service use.

Disclosure of Invention

In view of the above, the present utility model is directed to a sheet feeding detection device for solving the above-mentioned problems.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

the printing sheet running position detection device comprises a guide rail and two detection assemblies, wherein the two detection assemblies are arranged on the guide rail in a sliding manner, and a printing sheet conveying channel is formed between the two detection units; the detection assembly includes: the device comprises a base, a mounting sleeve, a supporting frame, a displacement sensor and a contact block, wherein the mounting sleeve is arranged on the top surface of the base, the bottom end of the supporting frame is inserted into the mounting sleeve in a lifting manner, and a rotatable supporting shaft is arranged at the top of the supporting frame; the displacement sensor is arranged in the mounting sleeve, and a displacement gap exists between the detection end of the displacement sensor and the bottom surface of the support frame; the top surface of the base is also provided with a connecting shaft, one end of the contact block is hinged with the connecting shaft, the other end of the contact block is provided with an arc-shaped contact surface, and the side wall of the contact block, which is close to the detection assembly, is provided with a containing groove for containing the supporting shaft; before proceeding, the staff can adjust the positions of the two detection assemblies according to the preset position of the printed sheet so as to lead the printed sheet conveying channel to be aligned with the preset position of the printed sheet and lead the arc-shaped contact surface on the contact block to be propped against the side wall of the printed sheet conveying roller; when the transported printing Zhang Pianli sheet transport channel, the edge of the sheet can enter between the arc contact surface and the side wall of the sheet transport roller, and the contact block rotates by taking the connecting shaft as the shaft, so that the support frame is pressed down, and the displacement sensor can send out a signal due to the shrinkage of the displacement gap, so that the staff is prompted to take the sheet transport position.

Further, the detection assembly comprises a reset spring, the reset spring is arranged inside the installation sleeve, one end of the reset spring is connected with the bottom surface of the support frame, and the other end of the reset spring is connected with the inner wall of the bottom of the installation sleeve.

Further, a limit bar is arranged on the side wall of the supporting frame, and a limit groove for accommodating the limit bar is arranged on the inner side wall of the mounting sleeve.

Further, a plurality of rolling beads are arranged on the arc-shaped contact surface.

Further, the top surface of the base is provided with a mounting groove, and the bottom end of the mounting sleeve is arranged in the mounting groove.

Further, a locking bolt is arranged on the base, and a locking groove for accommodating the locking bolt is arranged on the side wall of the guide rail; the locking groove is internally provided with a rubber anti-skid pad, and the end part of the locking bolt is propped against the rubber anti-skid pad.

Further, the base is provided with a guide block, and the top surface of the guide rail is provided with a guide groove for accommodating the guide block.

Further, a graduated scale is arranged on the top surface of the guide rail, and the length direction of the graduated scale is parallel to the length direction of the guide rail.

Compared with the prior art, the printed sheet running position detection device has the following advantages:

(1) The utility model relates to a printed sheet walking position detection device, which comprises a detection assembly, a lifting support frame and a displacement sensor, wherein when a printed sheet is shifted in position, the contact head abutted against a printed sheet conveying roller can rotate due to the shift of the printed sheet, so that the support frame is pressed down, and the displacement sensor sends out a signal. The staff can judge whether the phenomenon of printing sheet running before the beginning of the printing work through the device, thereby avoiding the occurrence of printing flaws on products, reducing the printing rejection rate and further improving the economic benefit.

(2) The sheet feeding detection device can drive the detection assembly to slide on the guide rail according to actual requirements, so that the position of the detection assembly is adjusted, and the sheet feeding detection device is suitable for sheet detection work of different specifications. Secondly, this device is equipped with the locking bolt on the base to be equipped with the locking groove on the guide rail, after detecting the subassembly and remove suitable position, the staff accessible locking bolt fixes the position of detecting the subassembly, avoids detecting the subassembly and takes place the skew in the use. In addition, this device still is equipped with the scale on the guide rail, and the staff can judge the interval of two detection components with the help of the scale fast to reduce the operation degree of difficulty of staff, conveniently make the specification phase-match of printed sheet conveying channel and printed sheet that awaits measuring.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a sheet feeding detection device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a guide rail according to an embodiment of the present utility model;

FIG. 3 is a schematic structural diagram of a detection assembly according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a detection assembly according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional view of a sensing assembly according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a support shaft, a support frame, a mounting sleeve, a displacement sensor and a spring according to an embodiment of the present utility model.

Reference numerals illustrate:

1-a guide rail; 11-locking grooves; 111-rubber skid pads; 12-a guide groove; 13-a graduated scale; 2-a base; 21-a connecting shaft; 22-mounting slots; 23-a guide block; 3-mounting a sleeve; 31-limit grooves; 4-supporting frames; 41-a support shaft; 42-limiting strips; a 5-displacement sensor; 6-contact blocks; 61-arc contact surface; 611-rolling beads; 62-a receiving groove; 7-a return spring; 8-locking bolt.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The structure of the sheet feeding detection device can be schematically shown in fig. 1-6, and the sheet feeding detection device in the embodiment comprises a guide rail 1 and two detection components, wherein the two detection components are slidably arranged on the guide rail 1, and a sheet conveying channel is formed between the two detection units. Before using, the staff can fix the guide rail 1 below the sheet conveying roller, and respectively adjust the positions of the two detection assemblies according to the specification of the sheet to be detected and the preset position of the sheet during printing, so that the sheet conveying channel between the two detection assemblies is aligned with the preset position of the sheet during printing.

Fig. 3, 4 and 5 are schematic diagrams of a detection assembly, as shown, which may include: base 2, installation sleeve 3, support frame 4, displacement sensor 5 and contact block 6. Wherein the base 2 should be slidably arranged on the guide rail 1, by means of which base 2 a mounting basis can be provided for other components in the detection assembly. A connecting shaft 21 is provided on the top surface of the base 2, one end of the contact block 6 should be hinged with the connecting shaft 21, and the other end is provided with an arc-shaped contact surface 61. During installation, the worker should make the arc-shaped contact surface 61 on the contact block 6 abut against the side wall of the sheet conveying roller, and when the conveyed sheets Zhang Pianli are conveyed through the sheet conveying channel, the edges of the sheets will enter between the arc-shaped contact surface 61 and the side wall of the sheet conveying roller, so that the contact block 6 rotates around the connecting shaft 21.

Optionally, in order to reduce friction loss of the contact block 6, a plurality of rolling beads 611 may be further provided on the arc-shaped contact surface 61 such that the rolling beads 611 contact with the side wall of the sheet conveying roller. The rolling beads 611 can reduce the friction resistance between the detection assembly and the sheet conveying roller, so that friction loss of the contact block 6 caused by rotation of the sheet conveying roller is avoided, and the service life of the device is prolonged.

As shown in fig. 2, in order to avoid the base 2 from being deviated during sliding, the top surface of the guide rail 1 may be provided with a guide groove 12 having a length direction parallel to the length direction of the guide rail 1, and the base 2 may be provided with a guide block 23. During assembly, a worker inserts the guide block 23 into the guide groove 12, thereby guiding the sliding direction of the base 2 by the cooperation of the guide block 23 and the guide groove 12.

Optionally, to facilitate locking the position of the base 2, a locking bolt 8 may be further provided on the base 2, and a locking groove 11 for receiving the locking bolt 8 is provided on a side wall of the guide rail 1. After the base 2 slides to a proper position, a worker can screw in the locking bolt 8 into the locking groove 11, so that the end part of the locking bolt 8 abuts against the inner side wall of the locking groove 11, the position of the base 2 is locked, and abnormal movement of the base 2 in the use process is prevented. In addition, in order to enhance the locking effect of the base 2, a rubber anti-slip pad 111 may be further provided inside the locking groove 11. When the locking bolt 8 is screwed into the locking groove 11, the end of the locking bolt 8 will abut against the rubber cleat 111. By arranging the rubber anti-skid pad 111, the friction resistance between the locking bolt 8 and the inner side wall of the locking groove 11 can be improved, and the locking limiting effect of the base 2 is further enhanced.

The mounting sleeve 3, the support frame 4 and the displacement sensor 5 in the detection assembly are used for converting the movement condition of the contact block 6 into an electric signal, so that a worker can conveniently judge whether the conveyed printed sheet is deviated or not. Wherein the mounting sleeve 3 should be disposed on the top surface of the base 2, a mounting groove 22 for accommodating the bottom of the mounting sleeve 3 may be disposed on the top surface of the base 2, the bottom end of the supporting frame 4 is inserted into the mounting sleeve 3 in a lifting manner, the displacement sensor 5 is disposed in the mounting sleeve 3, and a displacement gap exists between the detection end of the displacement sensor 5 and the bottom surface of the supporting frame 4. In order to achieve the motion transmission between the contact block 6 and the support frame 4, a rotatable support shaft 41 is provided at the top of the support frame 4, and a receiving groove 62 for receiving the support shaft 41 is provided on the side wall of the contact block 6 close to the detection assembly. When the contact block 6 rotates due to the deflection of the sheet, the contact block 6 presses down the supporting frame 4. Along with the descent of the support frame 4, the displacement gap is reduced, and a worker can set the triggering parameter of the displacement sensor 5 in advance according to the thickness of the sheet to be tested, so that the displacement sensor 5 sends out an electric signal when the displacement gap is smaller than the triggering parameter, thereby reminding the worker that the current position of the sheet is deviated, the risk of sheet running exists, and the position of the sheet is adjusted before the printing work starts in time.

It should be noted that, the displacement sensor 5 in this embodiment is a common sensor capable of converting the change of the measured physical quantity (i.e. the change of the distance between the displacement gaps) into the change of the electric quantity, and correspondingly generating an electric signal to send to an upper controller (such as a single chip microcomputer or a PLC). Since the internal structure and the working principle of the displacement sensor 5 are well known, and those skilled in the art can correctly use and install the displacement sensor 5 by working experience, the internal structure, the working principle and the line connection of the displacement sensor 5 will not be described in detail in the present application.

Optionally, in order to avoid the rotation of the support frame 4 during the lifting process, as shown in fig. 6, in this embodiment, a limit bar 42 may be disposed on the side wall of the support frame 4, and a limit groove 31 is disposed on the inner side wall of the mounting sleeve 3. During assembly, a worker can insert the limit bar 42 into the limit groove 31, so that the lifting process of the support frame 4 is circumferentially limited by means of the cooperation of the limit bar 42 and the limit groove 31.

In addition, to facilitate the return of the support frame 4 after lowering, the detection assembly may further comprise a return spring 7. As shown in fig. 5, the return spring 7 is disposed inside the mounting sleeve 3, and one end of the return spring 7 is connected to the bottom surface of the support frame 4, and the other end is connected to the bottom inner wall of the mounting sleeve 3. When the support frame 4 is lowered by the rotation of the contact block 6, the return spring 7 will be compressed. After the worker removes the offset sheet, the elastic force in the return spring 7 can make the supporting frame 4 rise, so as to drive the contact block 6 to rotate reversely, and further make the arc-shaped contact surface 61 of the contact block 6 prop against the side wall of the sheet conveying roller.

As an alternative implementation of this embodiment, in order to further facilitate the use of the device by the staff, a scale 13 is provided on the top surface of the guide rail 1, and the length direction of the scale 13 should be parallel to the length direction of the guide rail 1. When the gauge is used, a worker can rapidly judge the distance between the two detection components through the graduated scale 13, so that the positions of the detection components can be rapidly adjusted according to the degree of the graduated scale 13 when the product specification changes.

Effects of the above scheme are described below:

the embodiment provides a printing sheet position detection device, which can detect whether the printing sheet is deviated or not through a detection component, so as to judge whether the printing sheet position phenomenon occurs or not before the printing work starts. Secondly, the position of the detection assembly can be adjusted according to actual requirements, so that the device is suitable for sheet detection work of different specifications. In addition, the device can lock the position of the base through the locking bolt, so that abnormal movement of the detection assembly in the working process is avoided.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (8)

1. The utility model provides a position detection device is walked to printed sheet which characterized in that: the device comprises a guide rail (1) and two detection assemblies, wherein the two detection assemblies are arranged on the guide rail (1) in a sliding manner, and a sheet conveying channel is formed between the two detection units; the detection assembly includes: the device comprises a base (2), a mounting sleeve (3), a supporting frame (4), a displacement sensor (5) and a contact block (6), wherein the mounting sleeve (3) is arranged on the top surface of the base (2), the bottom end of the supporting frame (4) is inserted into the mounting sleeve (3) in a lifting manner, and a rotatable supporting shaft (41) is arranged at the top of the supporting frame (4); the displacement sensor (5) is arranged in the mounting sleeve (3), and a displacement gap exists between the detection end of the displacement sensor (5) and the bottom surface of the support frame (4); the top surface of the base (2) is also provided with a connecting shaft (21), one end of the contact block (6) is hinged with the connecting shaft (21), the other end of the contact block is provided with an arc-shaped contact surface (61), and the side wall of the contact block (6) close to the detection assembly is provided with a containing groove (62) for containing the supporting shaft (41).

2. The sheet feeding position detecting apparatus according to claim 1, wherein: the detection assembly comprises a reset spring (7), the reset spring (7) is arranged inside the installation sleeve (3), one end of the reset spring (7) is connected with the bottom surface of the support frame (4), and the other end of the reset spring is connected with the inner wall of the bottom of the installation sleeve (3).

3. The sheet feeding position detecting apparatus according to claim 1, wherein: the side wall of the supporting frame (4) is provided with a limit bar (42), and the inner side wall of the mounting sleeve (3) is provided with a limit groove (31) for accommodating the limit bar (42).

4. The sheet feeding position detecting apparatus according to claim 1, wherein: the arc-shaped contact surface (61) is provided with a plurality of rolling beads (611).

5. The sheet feeding position detecting apparatus according to claim 1, wherein: the top surface of the base (2) is provided with a mounting groove (22), and the bottom end of the mounting sleeve (3) is arranged in the mounting groove (22).

6. The sheet feeding position detecting apparatus according to claim 1, wherein: the base (2) is provided with a locking bolt (8), and the side wall of the guide rail (1) is provided with a locking groove (11) for accommodating the locking bolt (8); the locking groove (11) is internally provided with a rubber anti-slip pad (111), and the end part of the locking bolt (8) is propped against the rubber anti-slip pad (111).

7. The sheet feeding position detecting apparatus according to claim 1, wherein: the base (2) is provided with a guide block (23), and the top surface of the guide rail (1) is provided with a guide groove (12) for accommodating the guide block (23).

8. The sheet feeding position detecting apparatus according to claim 1, wherein: the top surface of the guide rail (1) is provided with a graduated scale (13), and the length direction of the graduated scale (13) is parallel to the length direction of the guide rail (1).