Riveting equipment

Abstract

The invention relates to the technical field of riveting equipment, in particular to riveting equipment which is characterized in that an extrusion block is slidably connected into each groove, a first spring is fixedly connected into each groove, one end of each first spring is fixedly connected to the corresponding extrusion block, and a limiting column is fixedly connected to the upper end of the interior of each groove; each limiting column is located on the inner side of the corresponding first spring, an air hole is formed in each limiting column, and each air hole penetrates through the punching head. In the process of riveting the supporting leg column with the sharp chamfer into the base hole, the extrusion force between the contact position of the supporting leg column with the sharp chamfer and the upper end of the base hole is gradually increased, and the situation that large extrusion force is generated at the contact position of the upper end of the base hole and the supporting leg column with the sharp chamfer in a short time is avoided; therefore, the upper end of the hole of the base is prevented from cracking due to the fact that large extrusion force is instantly generated, and the riveting effect of the supporting foot column with the sharp chamfer and the base is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of riveting equipment, and in particular to a riveting equipment. Background Art

[0002] Car cameras are devices used to provide a scientific basis for handling traffic accidents. Existing car cameras need to be fixed by welding the legs of the base, which will result in loose welding and prone to quality problems. In order to avoid the problem of loose welding, the legs with sharp chamfers are riveted into the holes of the base. The holes of the base will clamp the legs with sharp chamfers, making it impossible to separate the camera base to achieve the purpose of fixation.

[0003] When the support column with a sharp chamfer is riveted into the hole of the base, the support column with a sharp chamfer and the base are riveted and assembled by a riveting device. The riveting device drives the punch head with a cylinder to extrude and assemble the support column with a sharp chamfer. During the downward movement of the punch head, the punch head contacts the support column with a sharp chamfer and extrude it. At the moment when the punch head squeezes the support column with a sharp chamfer, the contact position between the bottom end of the support column with a sharp chamfer and the hole of the base is subjected to a large extrusion force in a short time. The instantaneous extrusion force acts on the hole opening of the base, which can easily cause the hole opening of the base to crack. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the contact position between the bottom end of the support column with a sharp chamfer and the base hole is subjected to a large extrusion force in a short period of time, and the instantaneous extrusion force acts on the hole opening of the base, which easily causes the base hole opening to crack. A riveting device is proposed to solve the problem that the bottom end of the support column with a sharp chamfer and the base hole are subjected to a large extrusion force in a short period of time.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A riveting device is designed, including a base frame, the upper end of the base frame is slidably connected to a riveting jig, the upper end of the base frame is fixedly connected to an electric telescopic rod for driving the riveting jig to move in a horizontal direction, the upper end of the base frame is fixedly connected to a support plate, the upper end of the support plate is fixedly connected to a stamping cylinder, the telescopic end of the stamping cylinder passes through the support plate and is fixedly connected to a stamping head, and a plurality of grooves are provided at the bottom end of the stamping head, each of which is slidably connected to an extrusion block, each of which is fixedly connected to a first spring, one end of each first spring is fixedly connected to the corresponding extrusion block, the inner upper end of each groove is fixedly connected to a limiting column, each of the limiting columns is located on the inner side of the corresponding first spring, each of the limiting columns is provided with an air hole, and each of the air holes passes through the stamping head.

[0007] Preferably, the riveting jig includes a support seat, which is slidably connected to the upper end of the base frame, and the support seat is fixedly connected to the telescopic end of the electric telescopic rod. A connecting groove is provided at the upper end of the support seat, and a limiting frame is inserted into the connecting groove, and a plurality of limiting holes are provided on the limiting frame.

[0008] Preferably, each of the extrusion blocks is fixedly connected with a sealing ring, and each of the sealing rings cooperates with the corresponding groove.

[0009] Preferably, the air hole is connected to a filling mechanism to prevent dust from adhering to the inner wall of the groove, and the filling mechanism includes a ring box, which is fixedly connected to the upper end of the punching head, and a lubricating liquid is provided in the ring box. The lower surface of the ring box is connected to a plurality of conduits, and one end of each of the conduits is connected to the corresponding air hole. One side of the ring box is connected to a connecting pipe, and a movable port is provided on the support plate. One end of the connecting pipe passes through the movable port and is connected to an open cylinder, and a piston plate is slidably connected to the open cylinder. The open end of the open cylinder is fixedly connected to a mounting bracket, and a second spring is fixedly connected to the mounting bracket, and one end of the second spring is fixedly connected to the upper end of the piston plate.

[0010] Preferably, the open cylinder is connected to a circulation separation mechanism for improving the lubrication effect, and the circulation separation mechanism includes a one-way tube, one end of the one-way tube is connected to the open cylinder, and the other end of the one-way tube is connected to the upper end of the annular box. A one-way valve is connected to the connecting pipe, and a filter is fixedly connected to the open cylinder, and the filter is located below the inlet of the one-way tube.

[0011] Preferably, the connecting pipe is connected to a discharge pipe, the discharge pipe is connected to a valve, the open cylinder is connected to a liquid injection pipe, and the liquid injection pipe is located above the one-way pipe inlet.

[0012] Preferably, a surge component is rotatably connected to the open cylinder, one end of the surge component extends into the open cylinder, and the filter is located above the surge component.

[0013] Preferably, the surging component includes a rotating shaft, which is rotatably connected to the open cylinder, one end of the rotating shaft extends into the open cylinder and is fixedly connected to a stirring member, and the stirring member is located below the filter screen, and the other end of the rotating shaft is fixedly connected to a gear, and a tooth plate is fixedly connected in the movable mouth, and the gear is meshed with the tooth plate.

[0014] The riveting equipment proposed by the present invention has the following beneficial effects:

[0015] In the process of riveting the support column with a sharp chamfer into the hole of the base, the extrusion pressure between the support column with a sharp chamfer and the upper end of the base hole is gradually increased, thereby avoiding the generation of a large extrusion pressure in a short period of time at the contact point between the upper end of the base hole and the support column with a sharp chamfer, thereby avoiding the upper end of the base hole from cracking due to the instantaneous large extrusion pressure, and improving the riveting effect of the support column with a sharp chamfer and the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the connection between the support column with sharp chamfers and the base in a riveting device proposed by the present invention;

[0017] Figure 2 A schematic diagram of the structure of a riveting device proposed by the present invention Figure 1 ;

[0018] Figure 3 A schematic diagram of the structure of a riveting device proposed by the present invention Figure 2 ;

[0019] Figure 4 This is a schematic structural diagram of the connection between a support plate, a punching cylinder and a punching head in a riveting device proposed by the present invention;

[0020] Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at point A above;

[0021] Figure 6 This is a schematic structural diagram of the connection between the punch head and the filling mechanism in a riveting device proposed by the present invention;

[0022] Figure 7 This is a schematic cross-sectional view of the connection between the punch head and the filling mechanism in a riveting device proposed by the present invention;

[0023] Figure 8 Schematic diagram of the connection between the filling mechanism and the circulation mechanism in a riveting device proposed by the present invention Figure 1 ;

[0024] Figure 9 Schematic diagram of the connection between the filling mechanism and the circulation mechanism in a riveting device proposed by the present invention Figure 2 ;

[0025] Figure 10 This is a schematic cross-sectional view of the connection between an open cylinder and a surge assembly in a riveting device proposed by the present invention;

[0026] Figure 11 for Figure 10 Schematic diagram of the local enlarged structure at point B above.

[0027] In the figure: 1. base frame; 2. electric telescopic rod; 3. riveting fixture; 4. support plate; 5. stamping cylinder; 6. stamping head; 7. groove; 8. extrusion block; 9. first spring; 10. limiting column; 11. air hole; 12. filling mechanism; 13. circulation mechanism; 31. support seat; 32. connecting groove; 33. limiting frame; 34. limiting hole; 121. annular box; 122. connecting pipe; 123. movable port; 124. open cylinder; 125. mounting frame; 126. second spring; 127. piston plate; 131. one-way pipe; 132. one-way valve; 133. discharge pipe; 134. filter screen; 135. injection pipe; 136. surge assembly; 1361. rotating shaft; 1362. agitator; 1363. gear; 1364. gear plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Example 1: Reference Figure 2-5 , a riveting device includes a base frame 1, the upper end of the base frame 1 is slidably connected to a riveting jig 3, the upper end of the base frame 1 is fixedly connected to an electric telescopic rod 2 for driving the riveting jig 3 to move in the horizontal direction, the upper end of the base frame 1 is fixedly connected to a support plate 4, the upper end of the support plate 4 is fixedly connected to a punching cylinder 5, the telescopic end of the punching cylinder 5 passes through the support plate 4 and is fixedly connected to a punching head 6, and a plurality of grooves 7 are provided at the bottom end of the punching head 6, each groove 7 is slidably connected to an extrusion block 8, each extrusion block 8 is fixedly connected to a sealing ring, and each sealing ring cooperates with the corresponding groove 7, each groove 7 is fixedly connected to a first spring 9, one end of each first spring 9 is fixedly connected to the corresponding extrusion block 8, the inner upper end of each groove 7 is fixedly connected to a limiting column 10, each limiting column 10 is located on the inner side of the corresponding first spring 9, each limiting column 10 is provided with an air hole 11, and each air hole 11 passes through the punching head 6;

[0030] Reference Figure 3 The riveting jig 3 includes a support base 31, which is slidably connected to the upper end of the base frame 1. The support base 31 is fixedly connected to the telescopic end of the electric telescopic rod 2. A connecting groove 32 is provided at the upper end of the support base 31, and a limiting frame 33 is inserted into the connecting groove 32. The limiting frame 33 is provided with a plurality of limiting holes 34.

[0031] Working principle:

[0032] Place the base in the support base 31, insert the sharp chamfered support column into the hole of the support base 31, insert the limiting frame 33 into the connecting groove 32, and insert the upper end of the sharp chamfered support column into the corresponding limiting hole 34. The limiting hole 34 limits the sharp chamfered support column.

[0033] After the electric telescopic rod 2 is powered on and started, it drives the support base 31 to move a set distance, and the support base 31 drives the limit frame 33 to move. During the movement of the limit frame 33, the support column with a sharp chamfer is limited so that the support column with a sharp chamfer remains in a vertical state. After the support base 31 moves the set distance, the support column with a sharp chamfer is located directly below the corresponding extrusion block 8;

[0034] After the punching cylinder 5 is started, it drives the punching head 6 to move downward a set distance and then reset. The punching head 6 drives the extrusion block 8 to move through the first spring 9. After the punching head 6 moves downward for a distance, the lower surface of the extrusion block 8 contacts the upper end of the support column with a sharp chamfer, and the punching head 6 continues to move downward. The first spring 9 squeezes the upper end of the support column with a sharp chamfer through the extrusion block 8. The support column with a sharp chamfer pushes the extrusion block 8. After the extrusion block 8 is pushed upward, it squeezes the first spring 9. The first spring 9 generates elastic force after being compressed. The elastic force generated by the first spring 9 pushes the support column with a sharp chamfer downward. The support column with a sharp chamfer squeezes the contact point of the upper end of the base hole. As the punching head 6 continues to move downward, the extrusion block 8 continues to move upward under the limit of the support column with a sharp chamfer, and the extrusion block 8 moves smoothly under the limit of the groove 7. After the extrusion block 8 moves upward, the gas in the groove 7 is squeezed out from the air hole 11. After the extrusion block 8 continues to move upward, it squeezes the first spring 9. The elastic force generated by the first spring 9 being squeezed upward by the extrusion block 8 gradually increases. The thrust generated by the first spring 9 on the extrusion block 8 gradually increases, and the extrusion block 8 continues to squeeze the support column with a sharp chamfer, so that the extrusion pressure between the support column with a sharp chamfer and the upper end of the base hole gradually increases. After the extrusion block 8 moves upward for a distance, it contacts the bottom end of the limiting column 10. The limiting column 10 rigidly supports the extrusion block 8. The punching head 6 drives the limiting column 10 to move. The limiting column 10 squeezes the support column with a sharp chamfer through the extrusion block 8. After the punching head 6 moves downward a set distance, the limiting column 10 rivets the support column with a sharp chamfer into the hole of the base through the extrusion block 8;

[0035] During the time when the punch head 6 moves upward and contacts the bottom end of the limiting column 10, the elastic force generated by the first spring 9 gradually increases. The elastic force generated by the first spring 9 squeezes the support column with sharp chamfers through the extrusion block 8, and the extrusion pressure between the support column with sharp chamfers and the upper end of the base hole gradually increases. When the extrusion block 8 contacts the bottom end of the limiting column 10, the extrusion pressure of the extrusion block 8 on the support column with sharp chamfers is increased again, and the support column with sharp chamfers is riveted into the hole of the base. In the process of riveting the support column with sharp chamfers into the hole of the base, the extrusion pressure between the support column with sharp chamfers and the upper end of the base hole gradually increases, avoiding the generation of a large extrusion pressure in a short period of time at the contact between the upper end of the base hole and the support column with sharp chamfers, thereby avoiding the cracking of the upper end of the base hole due to the instantaneous large extrusion pressure, and improving the riveting effect of the support column with sharp chamfers and the base;

[0036] After the punching head 6 moves downward for a set distance, it resets upward. The punching head 6 drives the extrusion block 8 to move upward through the first spring 9. After the extrusion block 8 moves upward, it gradually separates from the support column with sharp chamfers. The elastic force generated by the first spring 9 pushes the extrusion block 8 to move downward and reset. During the downward movement and reset process of the extrusion block 8, external air enters the groove 7 through the air hole 11.

[0037] Example 2: During the downward movement and reset of the extrusion block 8, the external air enters the groove 7 through the air hole 11. However, there is dust in the external air. During the process of the air repeatedly passing through the air hole 11 and entering the groove 7, the dust in the air is easily adhered to the inner wall of the groove 7, thereby affecting the movement of the extrusion block 8 in the groove 7. Figure 6-8 As another preferred embodiment of the present invention, the difference from Example 1 is that the air hole 11 is connected to a filling mechanism 12 to prevent dust from adhering to the inner wall of the groove 7. The filling mechanism 12 includes a ring box 121, which is fixedly connected to the upper end of the punching head 6. Lubricating liquid is provided in the ring box 121. The lower surface of the ring box 121 is connected to a plurality of conduits, one end of each conduit is connected to the corresponding air hole 11, and one side of the ring box 121 is connected to a connecting pipe 122. A movable port 123 is provided on the support plate 4. One end of the connecting pipe 122 passes through the movable port 123 and is connected to an open cylinder 124. A piston plate 127 is slidably connected to the open cylinder 124. The open end of the open cylinder 124 is fixedly connected to a mounting bracket 125. A second spring 126 is fixedly connected to the mounting bracket 125. One end of the second spring 126 is fixedly connected to the upper end of the piston plate 127.

[0038] Working principle:

[0039] The open cylinder 124 is connected to the annular box 121 through the connecting pipe 122. The lubricating liquid in the annular box 121 is introduced into the annular box 121 through the connecting pipe 122. The lubricating liquid in the annular box 121 passes through the conduit and the air hole 11 in sequence and enters the groove 7. The lubricating liquid fills the groove 7.

[0040] After the extrusion block 8 moves upward, the space in the groove 7 is reduced, the pressure in the groove 7 is increased, the lubricating liquid in the groove 7 is squeezed out from the air hole 11, and the squeezed lubricating liquid is introduced into the open cylinder 124 through the connecting pipe 122. After the lubricating liquid is squeezed into the open cylinder 124, the pressure in the open cylinder 124 increases, and the lubricating liquid in the open cylinder 124 squeezes the piston plate 127 upward. After the piston plate 127 moves upward, it squeezes the second spring 126. The second spring 126 generates elastic force after being compressed. After the piston plate 127 moves upward, the space in the open cylinder 124 increases, and the squeezed lubricating liquid is stored. After the extrusion block 8 moves downward, During the resetting process, the space of the groove 7 increases and the pressure in the groove 7 decreases. The piston plate 127 moves downward and resets under the elastic force of the second spring 126. During the downward movement of the piston plate 127, the lubricating fluid is pushed into the connecting pipe 122. The connecting pipe 122 introduces the lubricating fluid into the open cylinder 124. The introduced lubricating fluid refills the groove 7. During the vertical movement of the extrusion block 8, the lubricating fluid always fills the groove 7, so that external gas cannot enter the groove 7, so that dust will not stick to the inner wall of the groove 7, and the inner wall of the groove 7 will remain smooth, thereby not affecting the movement of the extrusion block 8 in the groove 7.

[0041] Example 3: When the extrusion block 8 moves in the vertical direction, the lubricating liquid reciprocates into the groove 7. Since the extrusion block 8 continuously rubs against the inner wall of the groove 7, the lubricating liquid continuously contacts the inner wall of the groove 7 after friction, resulting in the generation of debris in the lubricating liquid, which affects the protective effect of the lubricating liquid on the inner wall of the groove 7. Figure 9-11 As another preferred embodiment of the present invention, the difference from Example 2 is that the open cylinder 124 is connected to a circulation separation mechanism 13 for improving the lubrication effect, the circulation separation mechanism 13 includes a one-way pipe 131, one end of the one-way pipe 131 is connected to the open cylinder 124, the other end of the one-way pipe 131 is connected to the upper end of the annular box 121, the connecting pipe 122 is connected to a one-way valve 132, a filter screen 134 is fixedly connected to the open cylinder 124, the filter screen 134 is located below the inlet of the one-way pipe 131, the connecting pipe 122 is connected to a discharge pipe 133, the discharge pipe 133 is connected to a valve, the open cylinder 124 is connected to a liquid injection pipe 135, the liquid injection pipe 135 is located above the inlet of the one-way pipe 131, the open cylinder 124 is rotatably connected to a surge component 136, one end of the surge component 136 extends into the open cylinder 124, and the filter screen 134 is located above the surge component 136;

[0042] Referring to 10-11, the surge assembly 136 includes a rotating shaft 1361, which is rotatably connected to the open cylinder 124. One end of the rotating shaft 1361 extends into the open cylinder 124 and is fixedly connected to an agitator 1362. The agitator 1362 is located below the filter 134. The other end of the rotating shaft 1361 is fixedly connected to a gear 1363. A tooth plate 1364 is fixedly connected to the movable port 123, and the gear 1363 is meshed with the tooth plate 1364.

[0043] Working principle:

[0044] When the extrusion block 8 moves upward, since the connecting pipe 122 is connected to the one-way valve 132, the lubricating liquid in the groove 7 is unidirectionally introduced into the bottom end of the open cylinder 124 through the connecting pipe 122. The lubricating liquid at the bottom end of the open cylinder 124 contacts the filter 134. The lubricating liquid filtered by the filter 134 is unidirectionally introduced into the annular box 121 through the one-way pipe 131. Each time the extrusion block 8 moves upward, part of the lubricating liquid in the annular box 121 is filtered and purified, thereby reducing the amount of impurities in the lubricating liquid in the annular box 121 and maintaining the protective effect of the lubricating liquid in the annular box 121 on the inner wall of the groove 7.

[0045] During the downward movement of the punch head 6, the open cylinder 124 drives the gear 1363 to move downward. During the downward movement, the gear 1363 engages with the tooth plate 1364, causing the gear 1363 to rotate. The gear 1363 drives the rotating shaft 1361 to rotate, and the rotating shaft 1361 drives the stirring member 1362 to rotate. After the stirring member 1362 rotates, it stirs the lubricating fluid at the bottom end of the open cylinder 124. The stirred lubricating fluid is in dynamic contact with the filter screen 134, thereby reducing the amount of debris on the filter screen 134, so that the filter screen 134 maintains the filtering effect.

[0046] The filtered debris is located between the filter screen 134 and the bottom end of the open cylinder 124. When there is too much debris between the filter screen 134 and the bottom end of the open cylinder 124, the valve is opened, and the debris between the filter screen 134 and the bottom end of the open cylinder 124 enters the connecting pipe 122. The debris in the connecting pipe 122 is discharged from the discharge pipe 133, reducing the amount of debris at the bottom end of the open cylinder 124.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A riveting device, comprising a base frame (1), a riveting jig (3) being slidably connected to the upper end of the base frame (1), an electric telescopic rod (2) being fixedly connected to the upper end of the base frame (1) for driving the riveting jig (3) to move in a horizontal direction, and a support plate (4) being fixedly connected to the upper end of the base frame (1), characterized in that: in: The upper end of the support plate (4) is fixedly connected to a punching cylinder (5), the telescopic end of the punching cylinder (5) passes through the support plate (4) and is fixedly connected to a punching head (6), the bottom end of the punching head (6) is provided with a plurality of grooves (7), each of the grooves (7) is slidably connected to an extrusion block (8), each of the grooves (7) is fixedly connected to a first spring (9), one end of each first spring (9) is fixedly connected to the corresponding extrusion block (8), the inner upper end of each groove (7) is fixedly connected to a limiting column (10), each limiting column (10) is located on the inner side of the corresponding first spring (9), each limiting column (10) is provided with an air hole (11), and each air hole (11) passes through the punching head (6).

2. The riveting equipment according to claim 1, characterized in that The riveting jig (3) comprises a support seat (31), the support seat (31) is slidably connected to the upper end of the base frame (1), the support seat (31) is fixedly connected to the telescopic end of the electric telescopic rod (2), a connecting groove (32) is provided at the upper end of the support seat (31), a limiting frame (33) is inserted into the connecting groove (32), and a plurality of limiting holes (34) are provided on the limiting frame (33).

3. The riveting equipment according to claim 1, characterized in that A sealing ring is fixedly connected to each of the extrusion blocks (8), and each of the sealing rings is matched with the corresponding groove (7).

4. The riveting equipment according to claim 1, characterized in that The air hole (11) is connected to a filling mechanism (12) for preventing dust from adhering to the inner wall of the groove (7). The filling mechanism (12) includes a circular box (121). The circular box (121) is fixedly connected to the upper end of the punch head (6). Lubricating liquid is provided in the circular box (121). The lower surface of the circular box (121) is connected to a plurality of conduits. One end of each conduit is connected to the corresponding air hole (11). One side of the circular box (121) is connected to a connecting pipe (122). The support plate (4) is provided with a movable port (123), one end of the connecting pipe (122) passes through the movable port (123) and is connected to an open cylinder (124), a piston plate (127) is slidably connected in the open cylinder (124), the open end of the open cylinder (124) is fixedly connected to a mounting frame (125), a second spring (126) is fixedly connected to the mounting frame (125), and one end of the second spring (126) is fixedly connected to the upper end of the piston plate (127).

5. The riveting equipment according to claim 4, characterized in that: The open cylinder (124) is connected to a circulation separation mechanism (13) for improving the lubrication effect. The circulation separation mechanism (13) includes a one-way tube (131). One end of the one-way tube (131) is connected to the open cylinder (124), and the other end of the one-way tube (131) is connected to the upper end of the annular box (121). A one-way valve (132) is connected to the connecting pipe (122). A filter screen (134) is fixedly connected to the open cylinder (124), and the filter screen (134) is located below the inlet of the one-way tube (131).

6. The riveting device according to claim 5, characterized in that: The connecting pipe (122) is connected to a discharge pipe (133), and the discharge pipe (133) is connected to a valve. The open cylinder (124) is connected to a liquid injection pipe (135), and the liquid injection pipe (135) is located above the inlet of the one-way pipe (131).

7. The riveting device according to claim 6, characterized in that A surge component (136) is rotatably connected to the open cylinder (124), one end of the surge component (136) extends into the open cylinder (124), and the filter (134) is located above the surge component (136).

8. The riveting device according to claim 7, characterized in that: The surging component (136) includes a rotating shaft (1361), which is rotatably connected to the open cylinder (124). One end of the rotating shaft (1361) extends into the open cylinder (124) and is fixedly connected to an agitator (1362). The agitator (1362) is located below the filter screen (134). The other end of the rotating shaft (1361) is fixedly connected to a gear (1363). A tooth plate (1364) is fixedly connected to the movable port (123), and the gear (1363) is meshed with the tooth plate (1364).

Images