FI90321B - Continuously operating arrangement for alignment of compressive and tensile forces on a piece which is fed in relative to the arrangement - Google Patents

Abstract

The invention concerns a continuously operating arrangement for exerting compression or tension force on a piece 1 fed into the arrangement, in respective cases on a part of the piece situated in the arrangement during its operation, which arrangement comprises at least two roll pairs 2, 3 or similar which lie apart from each other in the travel direction of the piece 1, and through whose intermediate nips 4, 5 the piece 1 advances. On at least one roll 6 of at least one roll pair 2 or similar, a drive member 10, supported on the roll 6 and thus able to rotate with the roll, has been connected, which drive member brings about a concentric rotational movement in relation to the axis of rotation of roll 6, and which in its turn is arranged to transmit the said rotational movement, via force transfering members 11-15, to at least one roll 8 of a second pair of rolls 3. <IMAGE>

Description

1 90321

A continuous device for applying compressive or tensile force to a device to be fed relative to the device. - Kontinuor \ iqt opererande anordning för inriktning av kompn i ons- oli.m dragkraft pä ett stycke som mätäs i förhällande account anordningen.

The invention relates to a continuous device for applying a compressive or tensile force to a part to be fed relative to a device to a part of a part at the respective device using at least two pairs of rollers or the like which are spaced apart in the direction of movement of the part.

German application publication 2 160 257 discloses a press device 1a of this type, which is intended to be used for continuously pressing the parts to be glued to the joint of a finger of wood. To reduce energy losses, a hydraulic system is provided between the feed and braking roller pair, comprising a hydraulic motor rotating the roller connected to the feed roller shaft, a hydraulic pump connected to the brake roller shaft, and pipelines connecting said motor to said pump, to which a second hydraulic motor The disadvantage of this known pressing device is its complex and component-rich and therefore expensive structure.

The object of the invention is to provide a continuous device which is as simple in construction as possible, inexpensive and consumes little energy for applying a compressive or traction force to a device or the like to be fed relative to the device, and which device can be used e.g. as a continuous press for making finger joints and as part of, for example, a continuous strength sorter or other similar testing device for timber.

2 90321 This object is solved according to the invention in such a way that the device according to the invention is characterized in that at least one pair of rollers or the like is connected to the roll in a supported manner and thus rotatably with the roll, a drive member providing a concentric rotational movement by means of transmission means to transmit said rotational movement to at least one other pair of rollers or the like.

Other preferred further developments of the invention appear from the subclaims and from the following, in which the invention is described in more detail with reference to the accompanying drawing, in which:

Figure 1 shows a device according to the invention in a schematic side view.

Figure 2 shows a schematic plan view of a device according to the invention.

By means of the device schematically shown in Figures 1 and 2, a compressive or tensile force in the direction of movement of the body is applied to the body 1 to be fed from right to left in the figures. The device comprises two pairs of rollers 2, 3 which are spaced apart and through which the body 1 passes through the nips 4, 5. Each pair of rollers 2, 3 is arranged to apply an adjustable compressive force to the body 1 in the nip 4, 5. The compressive or tensile force is thus applied to the part of the body 1 in the direction of movement between the nips 4, 5.

The pair of rollers 2 comprises an upper roll denoted by reference numeral 6 and a lower roller denoted by reference numeral 7. Correspondingly, the pair of rollers 3 comprises an upper roll denoted by reference numeral 8 and a lower roll denoted by reference numeral 9. It is, of course, clear that instead of individual rollers 6-9, groups formed by e.g. several rolls can be used, or the rollers can support e.g. a roller belt.

3 90321

A hydraulic motor 10 is arranged inside the roller 6, which is connected to the hydraulic unit 16 acting as a power source in a manner known per se. The body part of the motor 10 is connected to the jacket or end surface of the roller 6. At the same time, the shaft 11 of the motor 10 forms the axis of rotation of the roll 6 or a part thereof. The roller 6 is mounted so that it can rotate freely with respect to the shaft 11.

A sprocket 12 is connected to the end of the common shaft 11 of the roller 6 and the motor 10, and a sprocket 14 is connected to the shaft 13 of the roller 8, which form a fixed unit, and the sprockets 12 and 14 are connected to each other by a chain 15.

The operation of the device is as follows.

When feeding pieces 1 in the direction of the arrow 17 through the nips 4, 5, rotary rolls 6-9 substantially one piece syöttöno-speed determined by the peripheral speed. Now, when a force is applied from the hydraulic unit 16 to the hydraulic motor 10, the body part of which is thus supported on the roller 6 and rotates with it, the motor 10 exerts a rotating force on the shaft 11 which is transmitted through the chain 15 to the rotating force. The force thus applied to the roll 8 can act either parallel to the direction of rotation of the roll 8 or against the direction of rotation. In the former case, the part of the body 1 between the nips 4, 5 is subjected to a tensile force and in the latter case to a compressive force. Compression or traction is selected simply by changing the direction of rotation of the motor 10 and the amount of compression or traction by adjusting the power of the motor 10.

The power required by the device is very small, because the pairs of rollers 2, 3 produce forces, most of which are canceled out as internal forces on the body 1. Thus, in order to feed the piece 1, in addition to the normal frictional forces, only the difference between the forces 90321 applied by the powers 6 and 8 to the piece 1 must be overcome.

The invention has been described above essentially with reference to only one preferred embodiment thereof. However, this is in no way intended to limit the invention to this example only, but many modifications are possible within the scope of the appended claims. In addition to compressing the finger joint connections 18, the device according to the invention can be used in many other applications where a compressive or tensile force must be applied to the continuously advancing body.

Claims (7)

1. Kentinuor non-operative device for aligning compression or traction on a piece measured in relation to the device. (1), in each case on a part of the piece located at the device, using the device belonging to at least two pairs of rollers (2, 3) or the like, which are spaced apart in the direction of movement of the piece (1) and through which the intermediate nip (n, 5) the piece (1) advances, characterized in that at least one roll (6) of at least one pair of rolls (2) or the like has one supported on the roll (6), and thus with the roll (6) rotatable drive means (10) which provide a concentric rotational movement relative to the rotational axis of the roller (6) and which in turn is arranged to transmit said rotational motion to at least one roller (8) by a second roller pair. (3). Device according to claim 1, characterized in, atl. the drive means (10) is a hydraulic motor. Device according to claim 1 or 2, characterized in that the driving means (10) is arranged inside the roller (6). Device according to any of claims 1-3, characterized in that the body part of the drive means is supported on the casing and / or end surface of the roller (6). Apparatus somewhat of claims 1-4, characterized in that the rotatable portion of the roller (6) of the roller (6) is rotatable (11) relative to the body part of the drive (10). Device according to any of claims 1-3, characterized in that the power transmission means (11-15) comprise 8 '-7'] of a sprocket (12, 14) or correspondingly mounted both on the rotated and rotating roller shaft (11). , 13). which are joined to each other by a chain strap (15) or equivalent.