SU482938A3 - Press for joining wooden structures - Google Patents

Description

At the opposite ends of the base 2, there are end plates 11, each of which has a pair of vertically arranged guides 12 placed along opposite sides of the plate, the guides having vertically aligned holes. At the opposite ends of the movable head 3, end plates 13 are installed, at each of the opposite sides of which a pair of vertically arranged guides 14 is placed. At the ends of the press, a pair of guide rods 15 are placed, which are placed in the holes of the guides 12 and 14. Moreover, the guides the rods 15 are fixedly mounted in one of the upper guides 14. In accordance with this, the movable head 3 reciprocates in the vertical direction to the lower base 2.

To move the movable head 3. to the base 2 and from it at the opposite ends of the press, hydraulic cylinders 16 are mounted, fixed between the base 2 and the movable head 3. On each side of the press, the cylinder 16 is pivotally attached to the bracket 17 mounted on the end plate 13 of the movable head 3 The piston rod 18 protruding from the cylinder 16 terminates in an earring 19, which is pivotally connected to a bracket 20 fixed to the end plate And the lower base 2. Thus, the movement of the rod 18 relative to the cylinder 16 causes lowering and raising the movable head 3 relative to the base 2. The cylinder 16 is driven by a hydraulic system (not shown in the drawing).

To transfer the force when asymmetrical loads are applied, an additional transfer mechanism is made with the crank levers 21 and 22 at the respective opposite ends of the press, and these crank levers are hinged on the base 2 on the respective pins 23 and 24. Each of the protruding arms 25 and 26 protruding outward and 22 is pivotally connected to the lower ends of a pair of t g 27 axis 28. The upper ends of the t g 27 are pivotally connected to a pair of elements 29 which are rigidly attached to the head 3. Thus, when moving the head 3 to the base vaniyu 2 or away from the crank arm 21 is rotated clockwise or counterclockwise (as shown in FIG. 1). Accordingly, the crank arm 22 is rotated in opposite directions. The lower arm 30 of the crank arm 21 is connected to the fork 31, and the upper arm 32 of the crank arm 22 is pivotally connected to the fork 33. The opposite ends of the forks 31 and 33 are rigidly fixed at opposite ends of the transfer rod 34, which is a rigid steel pipe that runs between the opposite the ends of the press under the bottom plate 4.

When moving the head 3 to the base 2 ti gi 27, located on the left side of the press, rotate the crank lever 22 counterclockwise, stretching the transfer rod 34 in the direction of the crank lever 22. At the same time, the grommets 27, located on the right side of the press, rotate the crank lever 21 clockwise, moving the corresponding end of the transfer rod 34 to the opposite end of the process, i.e., when the pressure on the press is symmetrical along the press plates, the transfer rod simply follows the movement of the crankshaft lever gov 21 H 22 N unloaded itself.

In the case of an asymmetric load, for example, caused by the location of the joint 35 on the right side of the press, the above-described movement of the pull rod, the crank arm and the transfer bar is repeated. However, in this case, an unloaded or partially loaded cylinder located at the opposite end of the press tends to turn the crank lever 22 counterclockwise, causing the transfer rod 34 to stretch, i.e. the transfer rod 34 tends to turn the crank lever 21 clockwise and moves the right end of the movable head 3 to the press plate, applying the unused capacity of the left cylinder to the fully used capacity of the cylinder located on the right side of the press.

On the contrary, if the joint 35 is located between the plates near the left end of the press, then the crank lever 21, located on the right side of the press, tends to turn clockwise as a result of the action of the corresponding cylinder; the transfer rod 34 is under compression, i.e., the unused capacity of the cylinder 16 located on the right side of the press is transmitted through the transfer rod, trying to turn the crank lever 22 located on the left side of the press counterclockwise, resulting in unused power is applied at the left side of the press. Thus, the full power of the cylinders is applied to the load regardless of its position along the press.

In addition, a plurality of rollers 36 are placed on the bottom plate of the press, which, under the action of a spring, protrude slightly above the upper plane of the bottom plate 4 of the press. These rollers are designed to hold the assembly table at some distance from the bottom plate 4 in order to facilitate the movement of the press relative to the fixed assembly table.

Subject invention

Claims (3)

1. A press for joining wooden structures, including a base, plates, a movable head, mechanisms for moving the head mounted on opposite sides of the press, characterized in that, in order to ensure the reliability of the press in working mode with asymmetric loads, mounted on opposite sides of the press the mechanisms for moving the head are kinematically connected with each other by means of a transfer rod, a pull-rod system and levers. 2. Press according to claim 1; characterized in that, in order to mobilize the press, the press is provided with rollers. 3. The press according to claim 1, characterized in that the rollers and the mechanism for their movement are located above the lower plate of the press. B -)  dFig J sixteen