MACHINE FOR PRESS WORK

Abstract: Machine for press work, or for example work in a drilling machine with a press (1) which can easily be raised, lowered and tilted in relation to its body (2). The work lights (4) follow the movement of the press up and down. The shelves (5) for material which is to be processed in the press also follows the press (1) when it is raised and lowered. The same is valid for the manoeuvre boxes (6). Thus you can handle the machine both in sitting and standing position, and very easily change between various working postures. The press table (3) is thin and hangs in the press (1) which hangs in the body (2) so that the operator can sit at the press table (3) and work in the same posture as at a desk. The top part of the press tool is fixed in the tool holder (7), the lower part of the press tool is fixed in the press table (3).

Description: MACHINE FOR PRESS WORK The invention in question refer to a machine, principally but not exclusively, designed for press work. The press may for example be exchanged for a drilling machine. Press work may for example be exchanged for drilling work. The press part may for example be exchanged for a drilling machine. More exactly the invention refer to a press with a press part 1 which easily can be raised, lowered and tilted in relation to its body 2. The work lights 4 follow the movement of the press part up and down. The shelves 5 for the work pieces that are to be processed in the press also follows the press part 1 when it is raised or lowered. The same is valid for the manoeuvre boxes 6. The press table 3 is thin and hangs from the press part 1 which hangs in the body 2 so that the operator can sit at the press table 3 and work in the same posture as at a desk. The top part of the press tool is fixed in the tool holder 7, the lower part of the press tool is fixed in the press table 3. The reason for the invention of this press are all the industrial injuries, for example wear out injuries caused by working with press machines. Previously a lot of effort has been put into the injuries caused by malfunction of the press, for example double stroke by eccentric presses. A double stroke can easily lead to that the operator has fingers cut off, etc. The effort to improve the function of the presses has been successful. Nevertheless very little has been done to solve the larger problem with wear out injuries etcetera on the operator caused by working with the press. Presses are generally speaking poor work places seen from an ergonomic point of view. Monotonous and inconvenient working postures and deficient illumination is a rule. It is well known that deficient work illumination causes injuries. The absents of load-relieving shelves for work pieces on the presses is standard as well. The press designers have consequently concentrated on designing presses that are fast, have high press power and are equipped with large work tables for large tools, etc. Automatized methods of working have also been developed. However, there is still a large part of the press work that cannot be automatized or exchanged for other methods. Consequently there will in the future still be a large number of injuries caused by wear out. The presented invention is designed to decrease the number of injuries. Previously known presses are available on which the press table is adjustable related to the part supplying the press power. Other presses have an adjustable part supplying the press power. Yet other presses that can be tilted backwards are available. There are also presses on which one can fit one's legs under the press table. The press types mentioned above all supply poor ergonomics. The legs do not fit under the press table good enough to supply a convenient working posture. One cannot alternate sitting and standing position by the press in order to prevent monotonous strain. The presses cannot be easily tilted backwards in order to get a good view over the work pieces and press tools. Moreover the work lights are constantly poor. The presses do not come with proper illumination, or places to fit such. Deficient illumination is often the cause of neck and shoulder problems. Inconvenient working posture at the press causes even more physical problems. Monotonous working postures are harmful as well. Another cause of pain and aches is when the operator continually has to raise arms and hands upwards. In order to reduce these inconveniences balance blocks are used to lift the arms. Yet there are injuries caused by strain. Consequently the press has to be more adapted to the human anatomy in order to create a more convenient working posture. The press described below has been designed to solve these problems. In the following the invention will be described in more detail with reference to the enclosed drawings. Fig 1 shows a side view with the operator in sitting position. Fig 2 shows a side view with the operator in standing position. In the figures of the blue print, 1 represents the press part, which is supported by a body 2. The press table 3 is hanging in the press part 1. The work lights 4, the shelves 5 and the manoeuvre boxes 6 are also fixed to the press part 1. The top part of the press tool is fixed in the tool holder 7. The press part which supplies the press power is separated from the body. The press part contains the press table and the part supplying the press power. Thus the press part can be raised, lowered and tilted in relation to the floor on which the operator is standing or sitting. It is essential to be able to easily adjust one's working level. It is important to have the option whether to sit or to stand and to be able to tilt the press part. It is not only the operator of the press who has to be able to adjust height and angle of the press part, but also the person who mounts the tool into the press and gets the tool working. The manoeuvring must be swift and quick enough so that the operator will take the time to adjust the press properly. Certain models of the press are therefore equipped with a memory, so that the operator with just a push of a button or by turning a personal key or something similar, can adjust the press to exactly the same position defined at an earlier occasion. Thus for example a physiotherapist can be consulted to help finding a perfect personal working posture. The press part must have a thin press table, otherwise one has to lift one's arms too high, with wear out injuries as a result. Having to lean far into the press or after the work pieces, is likewise harmful. A working posture similar to when working by a desk is desirable. The work lights must be adjustable as is common with the lights of a desk, to prevent reflexes and to make sure that work pieces and tools are properly illuminated. The manoeuvring is handled by the manoeuvre boxes, which follows the press part when it is adjusted in height. Optimal working posture can therefore be achieved without the slightest effort. Shelves, work lights and manoeuvre boxes follow the press table, when the press part is adjusted in height. Accordingly, in order to change from sitting to standing position, all it takes is a moments push of a button. The press part will then be raised to the new position and the press table, the shelves, the work lights and the manoeuvre boxes will follow. The press part is on each side equipped with adjustable shelves for work pieces. On each side there are also adjustable work lights. Inside the press part additional lighting is mounted, why both work pieces and tools are properly illuminated. Due to the adjustability of the shelves the work pieces can be placed conveniently to the press table. The shelves can be removed and hanged out of the way on the back of the press, if the work pieces for example are so big that they are put on pallets. The pallet lifter, preferably of adjustable model, can then be positioned close to the press table. The pallet lifter must be close to the press table so that the operator does not have to reach too far. The press part is designed so that the operator can sit closely to the press table. Therefore there is space underneath the press table, as under a desk. There are no supporting legs that interfere. Moreover the table is thin, in order to get a working posture similar to that by a desk. This is at variance with the fact that a press is designed to be rigid. The change in dimension in the body during pressing, must be kept as small as possible, to prevent the press tools from getting worn and to keep the tolerances of the work pieces. The figure shows a four pillar press which works best with a thin press table. A two pillar press does not create any major problems, while a C-press becomes considerably more difficult to get to work properly when it is demanded that both work pieces and operator are enabled closeness to the press table. A C-press has to interfere with the space under the press table. Fig 1 shows that this is not at all the case with the four pillar press in question. The invented press is designed to be compact, so that the main space is not taken up by the press, but instead the operator and the work pieces can have a lot of room. Of course, the machine does not have to be a press. The machine could for example be a drilling machine. Manual vertical drilling machines are seldom equipped with automatic feeding. Therefore one has to raise one's arm high in order to pull down the lever for each drilling. This feeding movement is inconvenient for the operator. On the other hand there are automatic drilling devices that may very well be mounted to a table. This drilling unit with table can then be mounted to the body and thereby obtain all the advantaged mentioned above. The presented press is for these reasons an hydraulic four pillar press designed for high hydraulic pressure, a minimum of 600 bar. In this case the hydraulic cylinder can be very small and is fixed into the top part of the press part. The voluminous hydraulic pump with its electric motor is on the other hand mounted to the body of the press. Pump, valves and cylinder are connected through hydraulic tubes and electrical cables running in flexible channels. These flexible channels are encased to prevent oil from squirting out, if a tube should brake. The possibility to tilt the press is not beneficial only for the operator. It is often desirable that a work piece or pieces scrap can fall out of the press tool by the laws of gravitation. This is possible if the press part can be tilted. The presented press can for this reason be tilted over 90 degrees. By dividing the press into two main parts, press part and body, the ergonomic advantages mentioned above are obtained. The press part contains the cylinder which supplies the press power and the return springs which supplies the return power. The press table is hanging from the press part and offers the resistance. Mounted on the press part are shelves, work lights and manoeuvre boxes. The body contains the hydraulic pump, the electric motor, the encased electric system, the oil tank, the valves and the counterweight. The body is in the bottom equipped with a counterweight plate, into which the motor is bolted with rubber suspension. By mounting the motor into the heavy counterweight, sounds and vibrations are prevented. Covers and girders are mounted on top of the counterweight, so that a tight motor room is obtained. The refrigeration of the motor is created by the covers, the counterweight and the oil circulation. The oil tank is placed outside of the motor room, high upon a side cover, in order to obtain proper refrigeration. This way another ergonomic advantage is obtained, namely low sound level. Vibrations are also harmful to the human being, why the movable press part is hanged with a vibration reducing element between itself and the body. Vibrations through the hydraulic pipes are prevented through that these on strategical places consists of hydraulic tubes. This way both sounds and vibrations are prevented.

Claims: CLAIMS 1. Machine for performance of for example press work, consisted of two parts, one part that processes the work pieces i.e. the press part (1) which contains the part supplying the press power and the press table (3) which gives the resistance and a part that is a body (2) which holds the press part characterized in that the press part is movable in relation to the body. 2. Machine according to claim 1, characterized in that the press part (1) can be vertically adjusted enough for the operator to either sit or stand during the work in the machine. 3. Machine according to claim 1, characterized in that the press part (1) can be tilted. 4. Machine according to claim 1, characterized in that the press table holding against the press power (3) is thin, no more than 110 mm. 5. Machine according to claim ^characterized in that the work lights (4) follow the press part, when it is raised or lowered. 6. Machine according to claim 1, characterized in that the shelves (5) for work pieces follow the press part, when it is raised or lowered. 7. Machine according to claim ^characterized in that the manoeuvre boxes (6) follow the press part, when it is raised or lowered. 8. Machine according to claim 1, characterized in that the machine has a memory for adjusting suitable working posture. 9. Machine according to claim ^characterized in that the machine has shelves that can be moved away from the press part to the body thanks to quick holders that can be manoeuvred without tools. 10. Machine according to claim 1, characterized in that the machine has a vibration reducing element between press part and body, and that motor, pump and valves are encased in a tight motor room.

Inventors: SKYLLERMARK STEFAN, SKYLLERMARK, STEFAN
Applicants: SKYLLERMARK STEFAN, SKYLLERMARK, STEFAN
Application year: 1996
Main classification: B25H1
IPC codes: B25H1, B30B15