摘要:
A hole expansion, forming device includes a cutting portion main, body formed to have a diameter for the cutting portion, main body to be housed within a joint hole and including a cutting blade tool movable in a range from a housed position at which a blade is housed within a diameter for the cutting portion main body to an extended position at which the blade projects out of the diameter, an advancing and retracting member that is constructed to move in an axial direction by an external force and rotate about an axis of the advancing and retracting member, and a link mechanism that converts an advancing and retracting movement of the advancing and retracting member into a rotational movement of the cutting blade tool, a tip portion bearing that is provided on a tip end of the cutting portion main body, and serves as a tip end side bearing when being housed in an inner side of the joint hole.
摘要:
The multi-layer bamboo plywood with high work strength isn't liable to warp, characterized in that said plywood is composed of bamboo strips or strip-shaped bamboo compositing materials that are superposed and glued one with respect to another, the side of said plywood is provided with a through hole running through the plywood perpendicular to said side, tensioned wires with high tenacity and elasticity are provided within said through hole and a fastening assembly is disposed at the end of said wires. The advantages of this invention consist in high strength, excellent abrasion resistance and being not liable to warp, which contribute to flat connection in series and long service life. Said bamboo plywood is a perfect substitute for lumber, and the wide use thereof will remarkably save lumber and thereby protect the forest resources.
摘要:
A method of forming a watertight plank section including sawing green planks and securing a plurality of these planks in such a way that when dried, the planks shrink together in a fashion that forms a watertight seal.
摘要:
One or more collars are configured to center a rod within a drilled hole in glued-in-rod (GIR) structures. The one or more collars fit over an end and/or along a length of the rod that gets inserted first into the drilled hole. The one or more collars may include splines or other features extending from a base of the collar. The features contact walls of the drilled hole to center the rod in the hole, while at the same time allowing fluid such as glue to pass around the collar as the collar and rod are inserted into the hole.
摘要:
A hole expansion device includes a cutting portion main, body formed to have a diameter for the cutting portion, main body to be housed within a joint hole and including a cutting blade tool movable in a range from a housed position at which a blade is housed within a diameter for the cutting portion main body to an extended position at which the blade projects out of the diameter, an advancing and retracting member that is constructed to move in an axial direction by an external force and rotate about an axis of the advancing and retracting member, and a link mechanism that converts an advancing and retracting movement of the advancing and retracting member into a rotational movement of the cutting blade tool.
摘要:
An apparatus for producing timber mats including plural layers of timbers that are parallel to each other and offset from each another at uniform intervals, wherein timbers in adjacent layers are oriented perpendicular to one another forming an array of intersections spaced in longitudinal columns and lateral rows, the apparatus comprising a timber mat layup table; a first lateral timber input oriented in a first direction and arranged at a first side of the timber mat layup table; a second lateral timber input oriented in a second direction opposite, coaxial and parallel to the first direction and arranged at a second side of the timber mat layup table opposite to the first side of the timber mat layup table; a longitudinal timber input oriented in a third direction perpendicular to the first direction and the second direction and arranged at a third side of the timber mat layup table.
摘要:
A floor installation system includes a hole making device for drilling holes in a solid wood strip. The hole making device comprises a linear guide assembly including at least one guiding rod, a first drill motor slidably mounted on the guiding rod of the linear guide assembly, a first fixed wood guiding sidewall non-movably mounted to the linear guide assembly and a second wood guiding sidewall mounted to the linear guide assembly. The first drill motor is provided with a first drill chuck driven by the first drill motor for drilling a hole in the solid wood strip. The first and second wood guiding sidewalls define a wood guiding channel therebetween for supporting the solid wood strip. The hole making further comprises an actuator motor provided for selectively moving the first drill motor along the guiding rod to and away from the wood guiding channel.