Gasoline engine silencer flange connecting plate welding tool

Abstract

In order to solve the problems that in the prior art, a gasoline engine silencer flange connecting plate welding method is complex in operation, it is difficult to guarantee that welding of an air inlet pipe and a flange connecting plate meets the design requirement, and the like, the utility model provides a gasoline engine silencer flange connecting plate welding tool. The device comprises a base plate, a supporting column, a pressure applying mechanism, a rotating seat, a pipe clamping mechanism and a plate clamping mechanism. The base plate is a rectangular plate, and a supporting column, a pressure applying mechanism and a rotating seat are fixedly arranged on the base plate; the supporting columns are vertical columns with rectangular cross sections, and the number of the supporting columns is eight. The pressure applying mechanisms are fixed to the left side and the right side of the supporting structure correspondingly. The rotating seat comprises a base, a stand column, a sliding sleeve, a driving gear and a wrench; the pipe clamping mechanism is arranged above the sliding sleeve on the stand column. The plate clamping mechanism is arranged above the base on the stand column. The air inlet pipe and flange connecting plate welding tool has the advantages that the air inlet pipe and the flange connecting plate can be welded on the same tool, labor intensity is relieved, and welding quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to a welding technology for a flange connecting plate of a gasoline engine muffler, and particularly to a welding tool for a flange connecting plate of a gasoline engine muffler. Background Art

[0002] The box body of the gasoline engine muffler is a cuboid structure with arc-shaped edges and corners, and is assembled by two upper and lower semi-cuboid box bodies. After assembly, a protrusion is formed at the joint of the cuboid box body. Moreover, an air inlet hole is provided at a corner of the cuboid gasoline engine muffler box body. In order to connect with the intake pipe, a vertical intake pipe needs to be welded at the air inlet hole, and a flange connecting plate is welded in the middle of the intake pipe (see the attached Figure 1 , in the figure, a is the gasoline engine muffler box body, b is the intake pipe, and c is the flange connecting plate). To ensure the effective connection of the intake pipe, it is required that the intake pipe is in a vertical position and the flange connecting plate is at a set height. The existing technology for welding the flange connecting plate of a gasoline engine muffler first uses a simple fixture to fix the intake pipe at a set position and weld the intake pipe to the gasoline engine box body; then uses another fixture to place the flange connecting plate at a set height and weld the flange connecting plate to the intake pipe. Or, first use a fixture to weld the flange connecting plate at a set position on the intake pipe, and then weld the intake pipe together with the flange connecting plate to the gasoline engine box body. Obviously, this method of clamping with two sets of fixtures and positioning and welding twice is not only complicated in operation, but also difficult to ensure that the welding positions of the intake pipe and the flange connecting plate meet the design requirements.

[0003] Obviously, the existing technology for welding the flange connecting plate of a gasoline engine muffler has problems such as complicated operation and difficulty in ensuring that the welding positions of the intake pipe and the flange connecting plate meet the design requirements. Summary of the Invention

[0004] In order to solve the problems existing in the existing technology for welding the flange connecting plate of a gasoline engine muffler, such as complicated operation and difficulty in ensuring that the welding positions of the intake pipe and the flange connecting plate meet the design requirements, the utility model provides a welding tool for a flange connecting plate of a gasoline engine muffler.

[0005] The welding tooling for the flange connecting plate of the gasoline engine muffler of the utility model includes a base plate, support columns, a pressing mechanism, a rotating seat, a pipe clamping mechanism and a plate clamping mechanism; the base plate is a rectangular plate, and support columns, a pressing mechanism and a rotating seat are fixedly arranged on the base plate; the support columns are eight columns with a rectangular cross-section shape, and two columns are fixed on the base plate in a group, thus forming a support structure with a rectangular middle space; the upper ends of the support columns are provided with arc-shaped notches and steps matching the outer edge and protrusions of the gasoline engine muffler box body; the fixing positions and heights of the support columns are such that after the gasoline engine muffler box body is placed on the support structure, the arc-shaped outer edges and protrusions around are in close contact with the arc-shaped notches and steps of the two columns in a group respectively, and the gasoline engine muffler box body is in a horizontal position; the pressing mechanism has two, which are respectively fixed on the left and right sides of the support structure, and when the pressing mechanism is in the pressing state, the bottom surface of the pressing head just contacts the upper surface of the gasoline engine muffler box body placed on the support structure; the rotating seat is fixed outside a corner of the support structure and includes a base, a column, a sliding sleeve, a driving gear and a wrench; the base is a column with a rectangular cross-section and is vertically fixed outside a corner of the support structure; the column is a cylinder, and a rack is arranged on the outer circle of the cylinder and is vertically fixed on the upper surface of the base; the sliding sleeve has a rectangular shape, and a through hole matching the column is vertically arranged in the middle, and a notch for accommodating the driving gear is arranged on one side of the rectangular sliding sleeve; the driving gear is installed in the notch of the sliding sleeve through a gear shaft and meshes with the rack of the column; the wrench is installed at the end of the gear shaft; the pipe clamping mechanism is arranged above the sliding sleeve on the column and includes a rotating arm I, a clamping column and a fastening nut; one end of the rotating arm is rotatably sleeved on the column, and the other end is fixed with a clamping column; the upper section of the clamping column is provided with an external thread and the upper end is fixed at the outer end of the rotating arm I, and the lower end is provided with a tension chuck; and when the rotating arm I rotates above the gasoline engine muffler box body placed on the support structure, the clamping column is coaxial with the air inlet hole on the gasoline engine muffler box body; the lower section of the fastening nut is provided with a tapered hole and is screwed on the clamping column and meshes with the external thread on the clamping column; the plate clamping mechanism is arranged above the base on the column and includes a rotating arm II, a telescopic plate, positioning columns and pressing plates; one end of the rotating arm II is rotatably sleeved on the column, and rectangular chutes with opposite openings are arranged on both sides of the other end; the rear section of the telescopic plate is slidably inserted into the rectangular chute of the rotating arm II, and the front section is provided with a semi-circular opening; there are two positioning columns, which are respectively fixed on both sides of the semi-circular opening of the telescopic plate; and the distance and diameter between the positioning columns are respectively the same as the distance and diameter of the through holes on both sides of the flange connecting plate; the pressing plates are two and are respectively rotatably installed on the columns outside the two positioning columns;The length that the telescopic plate of the plate clamping mechanism extends and the set height are respectively determined by when the second swing arm rotates above the gasoline engine muffler box placed on the support structure, after the telescopic plate extends to the set position, the axis of the semi-circular opening at the front section of the telescopic plate is coaxial with the air inlet hole on the gasoline engine muffler box and the flange connecting plate on the telescopic plate is exactly at the set height position.

[0006] Further, the pressing mechanism includes a base, a hinge seat, a T-shaped pressing head, a rocker, a connecting rod and a pressing head; the base is a cuboid, the hinge seat is fixed on the upper surface of the base, and hinge holes are provided at the front and rear ends of the hinge seat; the bottom of the vertical side of the T-shaped pressing head is hinged to the hinge hole at the front end of the hinge seat, a pressing head is provided on the front side of the horizontal side of the T-shaped pressing head, and a hinge hole is provided on the rear side of the horizontal side of the T-shaped pressing head; the rocker is strip-shaped, two hinge holes are provided at the front section of the rocker, the hinge hole at its end is hinged to the rear side of the horizontal side of the T-shaped pressing head, and the hinge hole in the middle of it is hinged to one end of the connecting rod; the other end of the connecting rod is hinged to the rear end of the hinge seat.

[0007] Further, the pressing head of the pressing mechanism is of an inverted U-shaped structure, the two legs of the U-shaped pressing head are the pressing heads, and the middle of the cross bar of the U-shaped pressing head is hinged to the front side of the horizontal side of the T-shaped pressing head.

[0008] Further, a limit sleeve is also provided between the base and the sliding sleeve.

[0009] Further, an inner step is provided in the inner hole of the tensioning chuck at the lower end of the clamping column.

[0010] Further, two limit columns I are provided on the upper surface of the sliding sleeve to respectively define the original rotation stop position and the working rotation stop position of the first swing arm; two limit columns II are provided on the upper surface of the base to respectively define the original rotation stop position and the working rotation stop position of the second swing arm.

[0011] The beneficial technical effect of the gasoline engine muffler flange connecting plate welding tooling of the present utility model is that it can weld the intake pipe and the flange connecting plate on the same tooling, reducing the labor intensity and ensuring the welding quality. Description of the Drawings

[0012] Att Figure 1 is a three-dimensional schematic diagram of the welding of the intake pipe and the flange connecting plate of the gasoline engine muffler;

[0013] Att Figure 2 is a three-dimensional schematic diagram of the gasoline engine muffler flange connecting plate welding tooling of the present utility model;

[0014] Att Figure 3 is a three-dimensional schematic diagram of the pressing mechanism of the present utility model;

[0015] Att Figure 4 is a three-dimensional schematic diagram of the rotating seat of the present utility model;

[0016] Attached Figure 5 is a three-dimensional schematic diagram of another angle of the rotating seat of the present utility model;

[0017] Attached Figure 6 is a three-dimensional schematic diagram of the partial decomposition of the pipe clamping mechanism of the present utility model;

[0018] Attached Figure 7 is a three-dimensional schematic diagram of the welding state of the intake pipe of the present utility model;

[0019] Attached Figure 8 is a three-dimensional schematic diagram of the welding state of the flange connecting plate of the present utility model.

[0020] In the figure, 1 is the substrate, 2 is the support column, 3 is the pressing mechanism, 3-1 is the base, 3-2 is the hinge seat, 3-3 is the T-shaped pressing head, 3-4 is the rocker, 3-5 is the connecting rod, 3-6 is the pressing head, 4 is the rotating seat, 4-1 is the base, 4-2 is the column, 4-3 is the sliding sleeve, 4-4 is the driving gear, 4-5 is the wrench, 4-6 is the limiting sleeve, 5 is the pipe clamping mechanism, 5-1 is the rotating arm I, 5-2 is the clamping column, 5-3 is the fastening nut, 5-4 is the limiting column I, 6 is the plate clamping mechanism, 6-1 is the rotating arm II, 6-2 is the telescopic plate, 6-3 is the positioning column, 6-4 is the pressing plate, 6-5 is the limiting column II.

[0021] The following further describes the flange connecting plate welding tooling of the gasoline engine muffler of the present utility model in conjunction with the accompanying drawings and specific embodiments. Specific embodiments

[0022] See attached Figure 2 、 4, 5, 6, 7, 8, the welding tooling for the flange connecting plate of the gasoline engine muffler of the present utility model includes a base plate 1, support columns 2, a pressing mechanism 3, a rotating seat 4, a pipe clamping mechanism 5 and a plate clamping mechanism 6; the base plate is a rectangular plate, and support columns, a pressing mechanism and a rotating seat are fixedly arranged on the base plate; the support columns are eight columns with a rectangular cross-section shape, and two columns are in a group and are respectively fixed on the base plate, thus forming a support structure with a rectangular middle space; the upper end heads of the support columns are provided with arc-shaped notches and steps matching the outer edge and protrusions of the gasoline engine muffler box body; the fixing positions and heights of the support columns are such that after the gasoline engine muffler box body is placed on the support structure, the arc-shaped outer edges and protrusions around are in close contact with the arc-shaped notches and steps of the two columns in a group respectively, and the gasoline engine muffler box body is in a horizontal position; the pressing mechanism is two, and is respectively fixed on the left and right sides of the support structure, and when the pressing mechanism is in the pressing state, the bottom surface of the pressing head just contacts the upper surface of the gasoline engine muffler box body placed on the support structure; the rotating seat is fixed outside a corner of the support structure, and includes a base 4-1, a column 4-2, a sliding sleeve 4-3, a driving gear 4-4 and a wrench 4-5; the base is a column with a rectangular cross-section and is vertically fixed outside a corner of the support structure; the column is a cylinder, and a rack is arranged on the outer circle of the cylinder and is vertically fixed on the upper surface of the base; the outer shape of the sliding sleeve is rectangular, a through hole matching the column is vertically arranged in the middle, and a notch for accommodating the driving gear is arranged on one side of the rectangular sliding sleeve; the driving gear is installed in the notch of the sliding sleeve through a gear shaft and meshes with the rack of the column; the wrench is installed at the end of the gear shaft; the pipe clamping mechanism is arranged above the sliding sleeve on the column and includes a rotating arm I 5-1, a clamping column 5-2 and a fastening nut 5-3; one end of the rotating arm is rotatably sleeved on the column, and a clamping column is fixed at the other end; the upper section of the clamping column is provided with an external thread and the upper end is fixed at the outer end of the rotating arm I, and the lower end is provided with a tensioning chuck; and when the rotating arm I rotates to the upper part of the gasoline engine muffler box body placed on the support structure, the clamping column is coaxial with the air inlet hole on the gasoline engine muffler box body; the lower section of the fastening nut is provided with a tapered hole and is screwed on the clamping column and meshes with the external thread on the clamping column; the plate clamping mechanism is arranged above the base on the column and includes a rotating arm II 6-1, a telescopic plate 6-2, positioning columns 6-3 and pressing plates 6-4; one end of the rotating arm II is rotatably sleeved on the column, and rectangular chutes with opposite openings are arranged on both sides of the other end; the rear section of the telescopic plate is slidably inserted into the rectangular chute of the rotating arm II, and a semi-circular opening is arranged at the front section; the positioning columns are two and are respectively fixed on both sides of the semi-circular opening of the telescopic plate; and the distance and diameter between the positioning columns are respectively the same as the distance and diameter of the through holes on both sides of the flange connecting plate; the pressing plates are two and are respectively rotatably installed on the columns outside the two positioning columns;The length of the telescopic plate of the plate clamping mechanism when it extends and the set height are respectively based on when the second swing arm rotates above the gasoline engine muffler box body placed on the support structure, after the telescopic plate extends to the set position, the axis of the semi-circular opening at the front section of the telescopic plate is coaxial with the air inlet hole on the gasoline engine muffler box body and the flange connecting plate on the telescopic plate is exactly at the set height position. The flange connecting plate welding tooling for the gasoline engine muffler of the present utility model uses the cooperation of the support column and the pressing mechanism to fix the gasoline engine muffler box body at the set position, uses the first swing arm and the second swing arm arranged on the rotating seat to realize the welding of the intake pipe and the flange connecting plate respectively, uses the pipe clamping mechanism and the plate clamping mechanism to realize the clamping and positioning of the intake pipe and the flange connecting plate during welding, realizes positioning and fixing on one tooling at one time, and simultaneously completes the welding of the intake pipe and the flange connecting plate. During specific operation, horizontally place the gasoline engine muffler box body on the support structure composed of support columns; control the pressing mechanism to fix the gasoline engine muffler box body on the support structure; thus, complete the positioning and fixing of the gasoline engine muffler box body. Rotate the first swing arm to be directly above the air inlet hole of the gasoline engine muffler box body; insert the intake pipe upward into the tension chuck, rotate the fastening nut so that the tension chuck firmly clamps the intake pipe; rotate the wrench to make the sliding sleeve slide downward, and the first swing arm also moves downward with the sliding sleeve, and the intake pipe is inserted into the air inlet hole of the gasoline engine muffler box body and is at the set height; thus, complete the positioning and fixing of the intake pipe. Weld the intake pipe to the gasoline engine muffler box body, after welding is completed, loosen the fastening nut, shake the sliding sleeve upward, and the tension chuck withdraws from the intake pipe; rotate the first swing arm to return it to the original position, and the intake pipe welding is completed. Rotate the second swing arm to face the air inlet hole of the gasoline engine muffler box body, push the telescopic plate to make it reach the set position, at this time, the semi-circular opening at the front end of the telescopic plate is just beside the just-welded intake pipe and is coaxial with the intake pipe; sleeved the flange connecting plate on the intake pipe from above the intake pipe and place it on the telescopic plate, and the through holes on both sides of the flange connecting plate are just sleeved on the positioning posts on the telescopic plate; rotate the pressing plate to fix the flange connecting plate on the telescopic plate; thus, complete the positioning and fixing of the flange connecting plate. Weld the flange connecting plate to the intake pipe, after welding is completed, unscrew the pressing plate, retract the telescopic plate, rotate the second swing arm to return it to the original position, and the flange connecting plate welding is completed. It can be seen that the flange connecting plate welding tooling for the gasoline engine muffler of the present utility model effectively reduces the labor intensity and ensures the welding quality.

[0023] See Appendix Figure 3, as one of the preferred technical solutions, the pressing mechanism includes a base 3-1, a hinge seat 3-2, a T-shaped punch 3-3, a rocker 3-4, a connecting rod 3-5, and a punch 3-6; the base is a cuboid, the hinge seat is fixed on the upper surface of the base, and hinge holes are provided at both the front and rear ends of the hinge seat; the bottom of the vertical side of the T-shaped punch is hinged to the hinge hole at the front end of the hinge seat, a punch is provided on the front side of the horizontal side of the T-shaped punch, and a hinge hole is provided on the rear side of the horizontal side of the T-shaped punch; the rocker is strip-shaped, two hinge holes are provided at the front section of the rocker, the hinge hole at its end is hinged to the rear side of the horizontal side of the T-shaped punch, and the hinge hole in the middle of it is hinged to one end of the connecting rod; the other end of the connecting rod is hinged to the rear end of the hinge seat. The pressing mechanism of the present utility model uses a rocker as a drive. When the rocker is lifted upward, the front end of the rocker drives the rear side of the T-shaped punch to move downward, and the punch provided on the front side of the T-shaped punch is lifted upward; when the rocker is pressed downward, the front end of the rocker drives the rear side of the T-shaped punch to lift upward, and the punch provided on the front side of the T-shaped punch presses downward.

[0024] As one of the preferred technical solutions, the punch 3-6 of the pressing mechanism is of an inverted U-shaped structure, the two legs of the U-shaped punch are the pressing heads, and the middle of the cross bar of the U-shaped punch is hinged to the front side of the horizontal side of the T-shaped punch. The middle of the U-shaped punch is hinged to the horizontal side of the T-shaped punch, which can adapt to the slight unevenness of the surface to be pressed during pressing to ensure stable and reliable pressing.

[0025] As one of the preferred technical solutions, a limit sleeve 4-6 is further provided between the base and the sliding sleeve. The setting of the limit sleeve can ensure that the sliding sleeve moves downward accurately in place, so as to ensure that the welding height of the air inlet pipe meets the design requirements.

[0026] As one of the preferred technical solutions, an inner step is provided in the inner hole of the tensioning chuck at the lower end of the clamping column. In this way, when the air inlet pipe is inserted, it will be blocked by the inner step, so that the air inlet pipe can only be inserted into a set length, thus ensuring that the welding height of the air inlet pipe meets the design requirements.

[0027] As one of the preferred technical solutions, two limit columns I 5-4 are provided on the upper surface of the sliding sleeve to respectively define the original rotation stop position and the working rotation stop position of the first swing arm; two limit columns II 6-5 are provided on the upper surface of the base to respectively define the original rotation stop position and the working rotation stop position of the second swing arm. The setting of the limit columns I and II can limit the rotation of the first swing arm and the second swing arm, so that they can accurately reach the set positions and accurately stop at the original rotation stop position and the working rotation stop position.

[0028] Obviously, the beneficial technical effect of the welding tooling for the flange connecting plate of the gasoline engine muffler of the present utility model is that it can weld the air inlet pipe and the flange connecting plate on the same tooling, reducing the labor intensity and ensuring the welding quality.

Claims

1. A welding tooling for a flange connecting plate of a gasoline engine muffler, characterized in that, The welding tooling includes a base plate, support columns, a pressing mechanism, a rotating seat, a pipe clamping mechanism and a plate clamping mechanism; the base plate is a rectangular plate, and support columns, a pressing mechanism and a rotating seat are fixedly arranged on the base plate; the support columns are eight columns with a rectangular cross-section, and two columns are in a group and fixedly arranged on the base plate respectively, thus forming a support structure with a rectangular middle space; the upper end heads of the support columns are provided with arc-shaped notches and steps that match the outer edge and protrusions of the gasoline engine muffler box body; the fixed positions and heights of the support columns are such that after the gasoline engine muffler box body is placed on the support structure, the arc-shaped outer edges and protrusions around it are in close contact with the arc-shaped notches and steps of the two columns in a group respectively, and the gasoline engine muffler box body is in a horizontal position; the pressing mechanism has two, which are respectively fixedly arranged on the left and right sides of the support structure, and when the pressing mechanism is in a pressing state, the bottom surface of the pressing head just contacts the upper surface of the gasoline engine muffler box body placed on the support structure; the rotating seat is fixedly arranged outside a corner of the support structure and includes a base, a column, a sliding sleeve, a driving gear and a wrench; the base is a column with a rectangular cross-section and is vertically fixed outside a corner of the support structure; the column is a cylinder, and a rack is arranged on the outer circle of the cylinder and is vertically fixed on the upper surface of the base; the outer shape of the sliding sleeve is rectangular, a through hole matching the column is vertically arranged in the middle, and a notch for accommodating the driving gear is arranged on one side of the rectangular sliding sleeve; the driving gear is installed in the notch of the sliding sleeve through a gear shaft and meshes with the rack of the column; the wrench is installed at the end of the gear shaft; the pipe clamping mechanism is arranged above the sliding sleeve on the column and includes a rotating arm I, a clamping column and a fastening nut; one end of the rotating arm is rotatably sleeved on the column, and a clamping column is fixed at the other end; the upper section of the clamping column is provided with an external thread, the upper end is fixed at the outer end of the rotating arm I, and the lower end is provided with a tension chuck; and when the rotating arm I rotates above the gasoline engine muffler box body placed on the support structure, the clamping column is coaxial with the air inlet hole on the gasoline engine muffler box body; the lower section of the fastening nut is provided with a tapered hole and is screwed on the clamping column and meshes with the external thread on the clamping column; the plate clamping mechanism is arranged above the base on the column and includes a rotating arm II, a telescopic plate, positioning columns and pressing plates; one end of the rotating arm II is rotatably sleeved on the column, and rectangular sliding grooves with opposite openings are arranged on both sides of the other end; the rear section of the telescopic plate is slidably inserted into the rectangular sliding groove of the rotating arm II, and a semi-circular opening is arranged at the front section; there are two positioning columns, which are respectively fixed on both sides of the semi-circular opening of the telescopic plate; and the distance and diameter between the positioning columns are respectively the same as the distance and diameter of the through holes on both sides of the flange connecting plate; there are two pressing plates, which are respectively rotatably installed on the columns outside the two positioning columns;The length and the set height of the telescopic plate of the plate clamping mechanism are respectively determined by the following criteria: when the swing arm II rotates to the upper part of the gasoline engine muffler box placed on the support structure, after the telescopic plate extends to the set position, the axis of the semi-circular opening at the front section of the telescopic plate is coaxial with the air inlet hole on the gasoline engine muffler box and the flange connecting plate on the telescopic plate is exactly at the set height position.

2. The welding tooling for the flange connecting plate of the gasoline engine muffler according to claim 1, characterized in that The pressure applying mechanism includes a base, a hinge seat, a T-shaped pressing head, a rocker, a connecting rod, and a pressing head. The base is a cuboid, and the hinge seat is fixed on the upper surface of the base. Hinge holes are provided at the front and rear ends of the hinge seat. The bottom of the vertical side of the T-shaped pressing head is hinged to the hinge hole at the front end of the hinge seat. A pressing head is provided on the front side of the horizontal side of the T-shaped pressing head, and a hinge hole is provided on the rear side of the horizontal side of the T-shaped pressing head. The rocker is strip-shaped. Two hinge holes are provided at the front section of the rocker. The hinge hole at its end is hinged to the rear side of the horizontal side of the T-shaped pressing head, and the hinge hole in the middle part thereof is hinged to one end of the connecting rod. The other end of the connecting rod is hinged to the rear end of the hinge seat.

3. The gasoline engine muffler flange connecting plate welding tooling according to claim 2, characterized in that, The pressing head of the pressure applying mechanism is of an inverted U-shaped structure. The two legs of the U-shaped pressing head are the pressure applying heads, and the middle part of the cross bar of the U-shaped pressing head is hinged to the front side of the horizontal side of the T-shaped pressing head.

4. The welding tooling for the flange connecting plate of the gasoline engine muffler according to claim 1, wherein, A limit sleeve is further provided between the base and the sliding sleeve.

5. The welding tooling for the flange connecting plate of the gasoline engine muffler according to claim 1, wherein, An inner step is provided in the inner hole of the tensioning chuck at the lower end of the clamping column.

6. The welding tooling for the flange connecting plate of the gasoline engine muffler according to claim 1, characterized in that, Two limit columns I are provided on the upper surface of the sliding sleeve to respectively define the original rotation stop position and the working rotation stop position of the first rotating arm. Two limit columns II are provided on the upper surface of the base to respectively define the original rotation stop position and the working rotation stop position of the second rotating arm.

Images