CN113427594B - A device for edge banding of office furniture panels - Google Patents

Abstract

The invention relates to the technical field of sheet edge sealing equipment, in particular to a sheet edge sealing device for office furniture, further comprising: edge blanking mechanisms arranged on both sides of the conveying equipment, the tops of the two edge blanking mechanisms are both fixed with upper Belt mechanism, glue spraying mechanism and cutting mechanism; in the edge sealing device for office furniture panels of the present invention, when the panel is edge-sealed, the panel is first placed on the top of the conveying device, and the conveying device drives the panel to move. , When the sheet is in contact with the edge strip, the adhesive sprayed on the surface of the edge strip, with the movement of the sheet, when the sealing strip contacts the edge holder, the restoring force generated by the deformation of the second compression spring itself makes the pressure The edge wheel is always in contact with the edge banding strip to realize the edge banding of the plate. When the edge banding contacts the heat conduction ring, the heating ring is activated to increase the temperature of the heat conduction ring.

Description

A device for edge banding of office furniture panels

technical field

The invention relates to the technical field of sheet edge sealing equipment, in particular to a sheet edge sealing device for office furniture.

Background technique

At present, in the production of panel furniture, edge sealing is one of the most important processes. It is mainly suitable for the pasting and decoration of solid wood furniture panels. Adhesives are used to paste wood edge strips for edge sealing work. At the same time, edge sealing is also a The process that is most prone to quality problems, the inferior edge banding process not only affects the appearance of the furniture, but also because the edge banding is not tight, it is easy to absorb water vapor, the furniture expands and molds, which seriously affects the performance and service life of the furniture. Therefore, many consumers When choosing furniture, it is also the first time to pay attention to the quality of the edge banding. By using edge banding equipment to seal the plate, the edge banding effect of the plate is relatively good, and the edge banding efficiency of the plate can be improved at the same time.

At present, during the use of edge banding equipment, the shapes of furniture panels are becoming more and more abundant, and the panels with curved edges are gradually used by personnel. However, after the existing edge banding equipment, the panels with horizontal edges can be edge banded , it is impossible to perform the edge sealing work on the sheet at the arc edge, so that the existing edge sealing mechanism cannot continue to be used. The capital cost consumed by the edge banding equipment.

SUMMARY OF THE INVENTION

In view of the above shortcomings of the prior art, the purpose of the present invention is to provide an edge banding device for office furniture sheets. The present invention uses a compression spring to cooperate with the edge holder wheel, and the compression spring itself elastically drives the side holder wheel to carry out the process. Move, so that the edge blanking wheel is always attached to the edge of the plate, and then the edge blanking work of the plate with the arc edge is realized, so that the edge banding equipment can greatly improve the application range of the edge banding device when it is in use, and reduce the purchase price. The cost of edge banding equipment.

For achieving the above object, the present invention provides the following technical solutions:

A device for edge banding of office furniture panels, comprising conveying equipment, and further comprising:

The crimping mechanisms are arranged on both sides of the conveying equipment, and the tops of the two crimping mechanisms are fixed with an upper belt mechanism, a glue spraying mechanism and a cutting mechanism;

The edge pressing mechanism includes a bottom plate, an outer surface of one side of the bottom plate is fixed on an outer surface of one side of the conveying equipment, two chute grooves are opened on the top of the bottom plate, and slide plates are slid inside the two chute grooves, A first connecting plate is fixed between the tops of the two sliding plates, a hollow shell is fixed on one outer surface of the first connecting plate, a first compression spring is fixed on one outer surface of the hollow shell, and the One end of the first compression spring is fixed with a first sliding rod, one end of the first sliding rod is fixed with a fixing block, the bottom of the fixing block is fixed with a hollow rod, and the outer surface of the hollow rod is sleeved with two covers A heat-conducting ring is rotatably connected between the top and bottom of the two cover plates, a heating ring is fixed on the top of one of the cover plates, and an electric telescopic rod is fixed on the inner bottom surface of the hollow rod. A limit pressure plate is fixed on the top of the rod, an adjustment block is fixed on the outer surface of one side of the first connecting plate close to the front and rear surfaces of the hollow shell, and the outer surface of two adjustment blocks is an opening mechanism, and the two adjustment blocks A second compression spring is fixed on one inner surface wall of one side of the block, a second sliding rod is fixed at one end of the two second compression springs, and a blank holder wheel is rotatably connected to one end of the two second sliding rods.

Further, a second connecting plate is fixed between the bottoms of the two sliding plates, and two first pneumatic telescopic rods are fixed on one outer surface of the second connecting plate.

Further, a fixing plate is fixed between one ends of the two first pneumatic telescopic rods, and the top of the fixing plate is fixed at the bottom of the bottom plate.

Further, the upper belt mechanism includes an upper belt casing, the bottom of the upper belt casing is fixed on the top of the two slide plates, the top of the upper belt casing is provided with two limit grooves, and the two An arc-shaped plate is slid inside the limiting groove, a first magnet is fixed on both inner surface walls of the upper casing, and a second magnet is fixed on one outer surface of the two arc-shaped plates , the tops of the two arc-shaped plates are fixed with a first motor, the output shafts of the two first motors are sleeved with a first roller, and a support block is fixed on the top of one of the adjustment blocks, and the A sliding through hole is opened on the top of the support block, and a sliding block is slid inside the sliding through hole, a second roller is rotatably sleeved on the bottom of the sliding block, and a tension spring is fixed on the outer surface of one side of the sliding block. One end of the tension spring is fixed on the top of one of the adjustment blocks.

Further, the glue spraying mechanism includes a support plate, an outer surface of one side of the support plate is fixed on the outer surface of one side of the first connecting plate, and a liquid storage bucket is fixed on the top of the support plate, and the liquid storage bucket is fixed on the top of the support plate. An air pump is fixed on the top of the air pump, and the output end of the air pump extends to the inside of the liquid storage tank.

Further, a liquid storage rod is fixed on one outer surface of the support block, and a second motor is fixed on the top of the liquid storage rod.

Further, the output shaft of the second motor extends to the inside of the liquid storage rod, and the output shaft of the second motor is fixed with a connecting rod.

Further, an adjustment plate is fixed between two ends of the connecting rod, and a plurality of spray heads are communicated with the outer surface of the connecting rod.

Further, the cutting mechanism includes a protective shell, the bottom of the protective shell is fixed on the top of one of the sliding plates, and the inner top surface of the protective shell is fixed with two second pneumatic telescopic rods.

Further, a pressure plate is fixed between the bottom ends of the two second pneumatic telescopic rods, and a cutting blade is fixed on the top of the pressure plate by screws.

beneficial effect

Adopting the technical scheme provided by the present invention, compared with the known public technology, has the following beneficial effects:

1. The edge banding device for office furniture panels of the present invention, when performing edge banding work on the panel, first place the panel on the top of the conveying equipment, and drive the panel to move through the operation of the conveying device. When the panel contacts the edge banding strip When the adhesive is sprayed on the surface of the edge band, with the movement of the plate, when the seal bar contacts the edge holder, the restoring force generated by the deformation of the second compression spring makes the edge holder always contact the edge band. The edge sealing of the sheet is realized. When the edge sealing contacts the heat conduction ring, the heating ring is activated to increase the temperature of the heat conduction ring. When the heat conduction ring contacts the edge sealing strip, the adhesive is heated. It makes the adhesive dry quickly and improves the work efficiency of the sheet edge sealing. By starting the electric telescopic rod, the height of the edge sealing strip can be adjusted, which avoids the deviation of the edge sealing strip during the edge sealing work, and improves the sealing performance of the board. By activating the first pneumatic telescopic rod, the slide plate drives the subsequent structure to move, so that the device can perform corresponding adjustment work according to plates of different widths, and improve the use effect of the packaging equipment.

2. In the edge-sealing device for office furniture sheets of the present invention, before the device performs the edge-sealing work, the edge-sealing strip is placed inside the casing of the upper belt, and one end of the edge-sealing strip is placed between the two first rollers at the same time. , cooperate with the repulsive force generated by the repulsive setting between the first magnet and the second magnet to drive the arc plate to move, realize the clamping of the edge strip, and start the first motor at the same time. When the edge strip reaches the second roller , The sliding block is driven to move by the restoring force generated by the deformation of the tension spring itself, so as to realize the secondary limit work of the edge banding. Edgebanding of edgebands of different thicknesses.

3. The edge banding device for office furniture sheets of the present invention is provided with a glue spraying mechanism. When the device performs edge banding work, the air pump is first started, and the air pump pressurizes the air pressure inside the liquid storage bucket, so that the adhesive moves to The inside of the liquid storage rod is finally sprayed out through the nozzle. When using edge strips of different widths, the second motor is first started, and the adjustment plate works according to the rotation of the second motor, so that the adjustment plate can block different nozzles. Realize the spraying of the designated nozzles, avoid waste of adhesive, and save the cost of edge sealing. By setting the cutting mechanism, when the equipment performs edge sealing work, the second pneumatic telescopic rod is activated to drive the cutting blade to move and complete the plate edge trimming work. .

Description of drawings

Fig. 1 is a kind of three-dimensional schematic diagram of the edge banding device used for office furniture board;

Fig. 2 is a kind of front view three-dimensional structure schematic diagram of the partial structure of the edge banding device used for office furniture board;

Fig. 3 is a kind of bottom-view three-dimensional structural schematic diagram of the partial structure of the edge banding device for office furniture sheet;

Fig. 4 is a kind of front-view sectional three-dimensional mechanism schematic diagram of the part mechanism of the edge banding device for office furniture sheet;

Figure 5 is a schematic side view of a cross-sectional three-dimensional mechanism for a part of a mechanism of an edge banding device for an office furniture sheet;

Fig. 6 is a top-view cross-sectional three-dimensional mechanism schematic diagram of a part mechanism of an edge banding device for an office furniture sheet;

Fig. 7 is a kind of partial enlarged view of the area A in Fig. 4 for the edge banding device of office furniture board;

FIG. 8 is a side sectional schematic view of a three-dimensional structure of a glue spraying mechanism for an edge banding device for office furniture panels.

illustration:

1. Conveying equipment; 2. Crimping mechanism; 201, bottom plate; 202, slide plate; 203, second connecting plate; 204, first pneumatic telescopic rod; 205, fixing plate; 206, first connecting plate; 207, hollow shell ; 208, the first sliding rod; 209, the fixed block; 210, the hollow rod; 211, the cover plate; 212, the heat conduction ring; 213, the heating ring; 214, the electric telescopic rod; 215, the limit pressure plate; 217, the second sliding rod; 218, the blank holder; 219, the second compression spring; 220, the first compression spring; 3, the upper belt mechanism; 301, the upper belt shell; 302, the arc plate; 303, the first magnet; 304, the second magnet; 305, the first motor; 306, the first roller; 307, the support block; 308, the slider; 309, the second roller; 310, the tension spring; 4, the glue spraying mechanism; 401, Support plate; 402, liquid storage tank; 403, air pump; 404, liquid storage rod; 405, second motor; 406, connecting rod; 407, adjusting plate; 408, spray head; 5, cutting mechanism; 501, protective shell; 502 , the second pneumatic telescopic rod; 503, the pressure plate; 504, the cutting sheet.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention will be further described below in conjunction with the examples.

Example 1

Please refer to FIGS. 1-8 , an edge-sealing device for office furniture panels, including a conveying device 1 , and further comprising: edge-pressing mechanisms 2 disposed on both sides of the conveying device 1 , the tops of the two edge-pressing mechanisms 2 are both The upper belt mechanism 3, the glue spraying mechanism 4 and the cutting mechanism 5 are fixed; the edge pressing mechanism 2 includes a bottom plate 201, one side outer surface of the bottom plate 201 is fixed on one side outer surface of the conveying equipment 1, and the top of the bottom plate 201 is provided with two A sliding slot, and a sliding plate 202 is slid inside the two sliding slots, a first connecting plate 206 is fixed between the tops of the two sliding plates 202, and a hollow shell 207 is fixed on the outer surface of one side of the first connecting plate 206. The hollow shell A first compression spring 220 is fixed on the outer surface of one side of the 207, one end of the first compression spring 220 is fixed with a first sliding rod 208, one end of the first sliding rod 208 is fixed with a fixing block 209, and the bottom of the fixing block 209 is fixed with a hollow Rod 210, the outer surface of the hollow rod 210 is sleeved with two cover plates 211, a heat conduction ring 212 is rotatably connected between the top and bottom of the two cover plates 211, and a heating ring 213 is fixed on the top of one of the cover plates 211. , the inner bottom surface of the hollow rod 210 is fixed with an electric telescopic rod 214, the top of the electric telescopic rod 214 is fixed with a limiting pressure plate 215, the outer surface of one side of the first connecting plate 206 is close to the front and rear surfaces of the hollow shell 207 are fixed with adjustment blocks 216, two One outer surface of the two adjusting blocks 216 is an opening mechanism, one inner surface wall of the two adjusting blocks 216 is fixed with a second compression spring 219 , and one end of the two second compression springs 219 is fixed with a second sliding rod 217 , one end of the two second sliding rods 217 is rotatably connected with a blanking wheel 218 .

A second connecting plate 203 is fixed between the bottoms of the two sliding plates 202 , and two first pneumatic telescopic rods 204 are fixed on one outer surface of the second connecting plate 203 .

A fixing plate 205 is fixed between one ends of the two first pneumatic telescopic rods 204 , and the top of the fixing plate 205 is fixed at the bottom of the bottom plate 201 .

The upper belt mechanism 3 includes an upper belt casing 301, the bottom of the upper belt casing 301 is fixed on the top of the two slide plates 202, and the top of the upper belt casing 301 is provided with two limit grooves, and the two limit grooves Arc-shaped plates 302 are slid on the inside of the upper belt case 301, first magnets 303 are fixed on both inner surface walls of the upper belt shell 301, second magnets 304 are fixed on one outer surface of the two arc-shaped plates 302, and two A first motor 305 is fixed on the top of the arc-shaped plate 302 , a first roller 306 is sleeved on the output shafts of the two first motors 305 , and a support block 307 is fixed on the top of one of the adjustment blocks 216 , and the top of the support block 307 A sliding through hole is opened, and a sliding block 308 slides inside the sliding through hole. The bottom of the sliding block 308 is rotated and sleeved with a second roller 309 , and an outer surface of one side of the sliding block 308 is fixed with a tension spring 310. The tension spring One end of 310 is fixed to the top of one of the adjustment blocks 216 .

The glue spraying mechanism 4 includes a support plate 401, one outer surface of the support plate 401 is fixed on one side outer surface of the first connecting plate 206, the top of the support plate 401 is fixed with a liquid storage bucket 402, and the top of the liquid storage bucket 402 is fixed with a The air pump 403 , and the output end of the air pump 403 extends to the interior of the liquid storage tank 402 .

A liquid storage rod 404 is fixed on one outer surface of the support block 307 , and a second motor 405 is fixed on the top of the liquid storage rod 404 .

The output shaft of the second motor 405 extends to the inside of the liquid storage rod 404 , and a connecting rod 406 is fixed to the output shaft of the second motor 405 .

A regulating plate 407 is fixed between two ends of the connecting rod 406 , and a plurality of spray heads 408 are communicated with the outer surface of the connecting rod 406 .

The cutting mechanism 5 includes a protective shell 501 , the bottom of the protective shell 501 is fixed on the top of one of the sliding plates 202 , and two second pneumatic telescopic rods 502 are fixed on the inner top surface of the protective shell 501 .

A pressing plate 503 is fixed between the bottom ends of the two second pneumatic telescopic rods 502 , and a cutting plate 504 is fixed on the top of the pressing plate 503 by screws.

Example 2

The edge banding device for office furniture panels provided in this embodiment is roughly the same as Embodiment 1, and the main difference between it and Embodiment 1 is:

The present invention is used for the edge banding device for office furniture panels. When the panel is edge banded, the panel is first placed on the top of the conveying device 1, and the conveying device 1 drives the panel to move. When the panel contacts the edge banding strip When the adhesive is sprayed on the surface of the edge strip, along with the movement of the plate, when the strip contacts the edge holder wheel 218, the second sliding rod 217 is pressed by the restoring force generated by the deformation of the second compression spring 219 itself. The second sliding rod 217 drives the edge holder 218 to move, so that the side holder 218 is always in contact with the edge banding, increasing the edge banding effect between the edge banding and the plate, and realizing the edge banding of the plate. When the edge banding contacts the heat conduction ring At 212, by starting the heating ring 213, the heating ring 213 heats the internal temperature of the heat conducting ring 212, so that the temperature of the heat conducting ring 212 increases. The adhesive is heated to make the adhesive dry quickly and improve the work efficiency of sheet edge sealing. By activating the electric telescopic rod 214, the electric telescopic rod 214 drives the limit pressure plate 215 to move, so as to realize the adjustment of the position of the edge sealing strip. , to avoid the offset of the edge banding strip during the edge banding operation, and improve the edge banding effect of the sheet. The sliding plate 202 is driven to move, and the sliding plate 202 drives the follow-up structure to move, so that the device can perform corresponding adjustment work according to plates of different widths, and improve the use effect of the packaging equipment. The electric telescopic rod 214 adopts the TJC-C4 model, the first pneumatic The telescopic rod 204 is of the SC type.

In the present invention for the edge banding device for office furniture panels, before the device performs the edge banding work, the edge banding strip is placed inside the upper belt shell 301, and one end of the edge banding band is placed between the two first rollers 306 at the same time. , the repulsive force generated by the repulsive arrangement between the first magnet 303 and the second magnet 304 drives the arc plate 302 to move, the arc plate 302 drives the first motor 305 to move, and the first motor 305 drives the first roller 306 to move The first motor 305 is activated at the same time, and the first motor 305 drives the first roller 306 to rotate, so that the edge band moves, and when the edge band reaches the second roller 309, by pulling The restoring force generated by the deformation of the extension spring 310 drives the sliding block 308 to move, the sliding block 308 drives the second roller 309 to move, and the second roller 309 presses the edge band to realize the secondary limit work on the edge band. In use, by adjusting the positions of the first roller 306 and the second roller 309 , the equipment can perform edge sealing work on edge sealing strips of different thicknesses, wherein the first motor 305 is a YL model.

The device for edge banding of office furniture panels of the present invention is provided with the glue spraying mechanism 4. When the device performs edge banding work, the air pump 403 is first started, and the air pump 403 pressurizes the air pressure inside the liquid storage bucket 402, so that the adhesive Move to the inside of the liquid storage rod 404, and finally spray out through the nozzle 408. When using edge strips of different widths, first start the second motor 405, the second motor 405 drives the connecting rod 406 to rotate, and the connecting rod 406 drives the adjustment plate 407 to rotate , the adjustment plate 407 is a cone-shaped arc structure. With the rotation of the adjustment plate 407, the adjustment plate 407 can block different nozzles 408, and realize the spraying of the designated nozzles 408, so as to avoid waste of adhesive and save energy. For the cost of edge banding, by setting the cutting mechanism 5, when the equipment performs edge banding, the second pneumatic telescopic rod 502 is activated, the second pneumatic telescopic rod 502 drives the pressing plate 503 to move, and the pressing plate 503 drives the cutting blade 504 to move, complete In the trimming work of the plate, the second pneumatic telescopic rod 502 adopts the ACQ model, and the second motor 405 adopts the SM42P-456B model.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; 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: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; 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 (9)

1. An edge-sealing device for office furniture panels, comprising a conveying device (1), characterized in that it further comprises: edge-pressing mechanisms (2) arranged on both sides of the conveying device (1), two of the edge-pressing mechanisms The top of the mechanism (2) is fixed with an upper belt mechanism (3), a glue spraying mechanism (4) and a cutting mechanism (5); the edge pressing mechanism (2) includes a bottom plate (201), and the bottom plate (201) has a bottom plate (201). The outer surface of one side is fixed on the outer surface of one side of the conveying device (1), the top of the bottom plate (201) is provided with two chutes, and slide plates (202) are slid on the insides of the two chutes. A first connecting plate (206) is fixed between the tops of the sliding plates (202), and a hollow shell (207) is fixed on one outer surface of the first connecting plate (206). A first compression spring (220) is fixed on the outer surface of the side, one end of the first compression spring (220) is fixed with a first sliding rod (208), and one end of the first sliding rod (208) is fixed with a fixing block ( 209), the bottom of the fixing block (209) is fixed with a hollow rod (210), and the outer surface of the hollow rod (210) is sleeved with two cover plates (211), two of the cover plates (211) A heat-conducting ring (212) is rotatably connected between the top and bottom of the cover plate (211), a heating ring (213) is fixed on the top of one of the cover plates (211), and an electric telescopic rod ( 214), a limiting pressure plate (215) is fixed on the top of the electric telescopic rod (214), and an adjustment block (216) is fixed on the front and rear surfaces of the first connecting plate (206) close to the hollow shell (207) on the outer surface of one side. ), the outer surface of one side of the two adjustment blocks (216) is an opening mechanism, and the inner surface wall of one side of the two adjustment blocks (216) is fixed with a second compression spring (219). One end of the second compression spring (219) is fixed with a second sliding rod (217), and one end of the two second sliding rods (217) is rotatably connected with a blank holder (218); The upper belt mechanism (3) comprises an upper belt casing (301), the bottom of the upper belt casing (301) is fixed on the tops of the two sliding plates (202), and the tops of the upper belt casings (301) Two limit grooves are opened, and arc plates (302) are slid inside the two limit grooves, and first magnets ( 303), a second magnet (304) is fixed on one outer surface of the two arc-shaped plates (302), and a first motor (305) is fixed on the top of the two arc-shaped plates (302), The output shafts of the two first motors (305) are sleeved with first rollers (306), and a support block (307) is fixed on the top of one of the adjustment blocks (216), and the support block (307) A sliding through hole is opened at the top of the sliding hole, and a slider (308) slides inside the sliding through hole, and a second roller (309) is rotatably sleeved at the bottom of the slider (308). An extension spring (310) is fixed on the outer surface of one side, and one end of the extension spring (310) is fixed on the top of one of the adjustment blocks (216). 2 . The edge banding device for office furniture panels according to claim 1 , wherein a second connecting plate ( 203 ) is fixed between the bottoms of the two sliding plates ( 202 ). Two first pneumatic telescopic rods (204) are fixed on one outer surface of the connecting plate (203). 3. An edge banding device for office furniture panels according to claim 2, characterized in that: a fixing plate (205) is fixed between one ends of the two first pneumatic telescopic rods (204), and the The top of the fixing plate (205) is fixed on the bottom of the bottom plate (201). 4. An edge banding device for office furniture panels according to claim 1, characterized in that: the glue spraying mechanism (4) comprises a support plate (401), one side of the support plate (401) is outside The surface is fixed on one side outer surface of the first connecting plate (206), a liquid storage bucket (402) is fixed on the top of the support plate (401), and an air pump (403) is fixed on the top of the liquid storage bucket (402). , the output end of the air pump (403) extends to the interior of the liquid storage barrel (402). 5. An edge banding device for office furniture panels according to claim 1, characterized in that: a liquid storage rod (404) is fixed on one outer surface of the support block (307), and the liquid storage rod A second motor (405) is fixed to the top of (404). 6. An edge banding device for office furniture panels according to claim 5, characterized in that: the output shaft of the second motor (405) extends to the inside of the liquid storage rod (404), and the second motor (405) extends into the interior of the storage rod (404). A connecting rod (406) is fixed to the output shaft of (405). 7. An edge banding device for office furniture panels according to claim 6, characterized in that: an adjustment plate (407) is fixed between two ends of the connecting rod (406), and the connecting rod (406) ) is communicated with a plurality of spray heads (408). 8 . The edge banding device for office furniture panels according to claim 1 , wherein the cutting mechanism ( 5 ) comprises a protective shell ( 501 ), and the bottom of the protective shell ( 501 ) is fixed therein. 9 . On the top of a sliding plate (202), two second pneumatic telescopic rods (502) are fixed on the inner top surface of the protective shell (501). 9. An edge banding device for office furniture panels according to claim 8, characterized in that: a pressing plate (503) is fixed between the bottom ends of the two second pneumatic telescopic rods (502), A cutting blade (504) is fixed on the top of the pressing plate (503) by screws.

Images