JPH01156002A - Slit machining device for staircase side girder - Google Patents

Abstract

PURPOSE: To accurately and efficiently form a slit by freely position-displaceably supporting a drill implement by a position regulator having a forward and reverse regulating means and a lateral regulating means, an elevation implement and a rotating implement. CONSTITUTION: A slit punching tool 6 has a pair of drill implements 7, a supporting plate 9, a position regulator 13, an elevation implement 15 and a rotating implement 16. The implement 16 has a gear 73A at an inner end, a driver 77 having a handle mounted at the other end of a manual shaft 75 mounted at an elevation plate 70 via a reduction gear box 76 of a known constitution, and an operating unit 80 having a gear 73B engaged with the gear 73A and fixed to an inner end of a pivotal shaft 76 perpendicularlypivotally secured to the plate 70. Accordingly, the implement 16 can maintain the plate 9 for supporting the implement 7 at a desired rotating angle by a reduction gear rotation of the gear 73A by an operation of the handle.

Description

Detailed Description of the Invention [Technical Field] The present invention enables the formation of dowel holes having a desired angular slope and depth at appropriate positions in the edges of stringers for forming stairs with high accuracy and efficiency. Regarding dowel hole machining equipment for hollow stair stringers, which improves product quality and productivity.

[Background technology]

When installing stairs to a house, generally, for example,
As shown in the figure, a beam member A that forms the upper floor or landing of a house is made into a dowel B for positioning a bottle body, etc., and a dowel B is made to protrude, and a dowel hole E is provided at the end edge D1 of the stringer of a staircase C. The positioning is performed by fitting the dowel into B.

However, such a dowel hole E can be made depending on, for example, the length, width,
Since the formation position 9, angular slope, depth, etc. differ depending on the type of staircase, such as the inclination angle and the height of the stringer, a variety of processing tools are required to process it. Previously, when installing other stair components such as G, holes were drilled in the stringers alone, which increased the number of processing steps and resulted in extremely poor processing efficiency. Furthermore, machining dowel holes in the stringers alone tends to lead to poor pitch between the dowel holes due to variations in the width between the stringers due to component errors and assembly errors in the treads F and sash plates G, for example, which can lead to poor product quality. It was also accompanied by

[Purpose of the invention]

In view of this situation, the present invention has been developed by simultaneously forming dowel holes in each end edge of a pair of side girders whose widths have been determined in advance using a drill tool that is held adjustable in four axes. The object of the present invention is to provide a dowel hole machining device for stair stringers that can solve the above-mentioned problems.

[Disclosure of the invention]

The present invention includes a holder 3 that holds a pair of stringers 2.2 for forming stairs in parallel with their longitudinal directions aligned, and a dowel hole 5 formed in an edge 2A of the stringer 2 held by the holder 3. The dowel hole punching tool 6 consists of a pair of drill tools 7 for drilling dowel holes, a support plate 9, and a dowel hole punching tool 6 that is provided on the support plate 9 and the drill tools 7 are provided on the support plate 9. A position adjustment tool 13 that includes a base plate 10 to be attached, and has a longitudinal adjustment means 11 and a lateral adjustment means 12 for repositioning the base plate 10 in the longitudinal direction and at right angles to the longitudinal direction, and a position adjustment tool 13 that moves the support plate 9 up and down. This is a dowel hole machining device 1 for a stair stringer, comprising a lifting tool 15 for rotating the support plate 9 around an axis perpendicular to the vertical plane extending in the longitudinal direction. As a result, dowel holes having a desired angular slope and depth can be formed at appropriate positions with high accuracy and efficiency, and the quality of the staircase' product and its productivity can be improved.

An embodiment of the stair stringer dowel hole machining apparatus 1 of the present invention will be described below with reference to the drawings, taking as an example a case in which the apparatus 1 for machining dowel holes for stair stringers according to the present invention is disposed on a manufacturing line L for producing stairs 20 shown in FIG.

Note that the staircase 20 includes a pair of side beams 2.2 in which concave grooves 23.24 for inserting the inset plate 21 and the tread plate 22 are continuously formed in a zigzag shape on the inward facing surface 2s, and the side beams 2 face each other. A sash board 21 installed between the grooves 23, a tread 22 installed between the grooves 24, and a back plate 25 spanning between the lower ends 2B of the side beams 2 and concealing the back side of the stairs 2°. , the back plate 2
In this example, the surface of the stairs 20 is It is covered with a packaging protective sheet 29 that spans between the stringers 2.

In addition, the stringer 2 has both edges 2A formed into a slope 30A that becomes vertical and a slope 30 that becomes horizontal when the stairs 20 are attached to the house.
In each slope 30A1 facing upward, a dowel hole 5 for inserting a dowel B provided in the beam member A is formed at right angles to the slope 30A1.

Further, in this example, the groove 23 has a trapezoidal cross section with the groove bottom d1 being larger than the opening width d2, as shown in FIGS. 8(a) and 8(b), for example, a wedge metal fitting. 31 is temporarily attached by driving or pressing the end of the recess plate 21 into the groove 23, the recess plate 21 is irremovably fixed to the stringer 2 with a single touch.

Further, the groove 24 is a parallel groove that opens at the lower end 2B of the side beam 2, and is formed so that the footboard 22 can be inserted from the bottom @ 2B.

Therefore, in this example, the stairs 20 are formed in the following order. First, each concave groove 2 facing each other in the stringers 2.2 arranged in parallel.
Between 3 and 3, temporarily attach wedge fittings 31 to both ends of the drawer plate 21.
-, and further press inward between the stringers 2.2, as shown in Figure 10 (al). Also, dowel holes 5 are bored in each slope 30A of the base frame body 32A, and on the base frame body 32A in which the dowel holes 5 are formed, a tread plate 22- is inserted upward between the grooves 23 facing each other. The semi-finished product 32B shown in FIG. 10(b) is formed by slidingly inserting and bonding from the lower end 2B facing the direction, and then sequentially attaching the back plate 25 and the decorative material 26 between the lower ends 2B of the stringers 2. Further, as shown in FIG. 10(c), by inverting the semi-finished product 32B up and down 180 degrees, a decorative material 27 is fitted onto the upper end 2C of the stringer 2 facing upward. By covering the surface with a protective sheet 29, the staircase 2o is formed as a finished product 32C shown in FIG. 1O(d) and FIG. 9.

Incidentally, such a staircase 20 is produced by a production line L shown in FIG.

In the figure, the production line L includes, for example, stringers 2, sill plates 2,
A base frame body 32 is formed by a three-way supply conveyor 36 that carries in 1 from an appropriate stockyard, and side beams 2 and stub plates 21 that are conveyed from the supply conveyor 36. A dowel hole machining device 1 for a stair side girder that drills dowel holes 5 in the girder edge 2A, and a tread 22 on a base frame 32 with dowel holes transported from the dowel hole machining device 1 for the stair side girder.
, the installation of the back plate 25 and decorative plate 26 from above is shown in Figure 10 (b).
), and the semi-finished products 32B conveyed from the first processing conveyor 37 are placed at upper and lower 180 as shown in FIG.
A front-back reversing device 39 is used for reversing the front and back sides, and a decorative material 27 and a protective sheet 29 are attached from above to the semi-finished product 32B that has been reversed by the front-back reversing device 39, as shown in FIG. 10(d).
The second processing conveyor 40 forming B and FIG.
(e) ~ (f) The pallet placed on its side as shown in (f)) 41
Then, the assembly 42, which is made up of a plurality of finished products 320- with the stringers 2 facing up and down, is inverted 90 degrees and stood up.
Vertical/horizontal inversion device 43 for stacking finished products 32C in multiple stages on the top surface
And the assembly 42 stood up! The enviable unloading conveyor 45
In addition, the supply conveyor 36, the first processing conveyor 37, and the second processing conveyor 40 store structural members necessary for assembling the stairs.
A, 46B, 46C, and 46D are provided on the side as necessary.

In this example, the supply conveyor 36 is composed of, for example, a three-strip roller conveyor, and includes a conveyor 36A that carries the long stringer 2 toward a carry-in location P in front of the stair stringer dowel hole processing device &1, and 36A is a two-strip roller conveyor 36B1, 36B2, 36B3 that is arranged perpendicularly at its downstream end and feeds the bracket plate 22 to the carry-in location P.
The vertical conveyor 36B is formed of a 4-way descending conveyor 36B having a four-way descending conveyor 36B.
As it rises above 6A, °ζ falls downward during standby. Therefore, the supply conveyor 36 can appropriately carry in each component from three directions without colliding with each other due to the vertical movement of the vertical conveyor 36B. It should be noted that carrying in from three directions is adopted in order to cope with the fact that the components of the stairs 20 are diverse depending on the type of staircase 20, and therefore to cope with the supply of various components from a large number of storage locations. Further, in this example, it is also used for carrying into the stockyards 46A to 46D provided within the line L.

Also, the first processing conveyor 37 and the second processing conveyor 4
In this example, 0 is a two-strip roller conveyor body, and the above-described components are attached to the upper surface of each roller conveyor body. In this example, the second processing conveyor 40 is a well-known table lifter 4.
0A is attached to facilitate the process of attaching the protective sheet 29 to the periphery.

In this example, the dowel hole machining device 1 for the stair stringer is formed of a holder 3 and a dowel hole punching tool 6, as shown in FIGS. Each front plate 50. It includes a mounting table 52 with a side plate 51 raised up, and a pressing tool 53 disposed on the other side edge of the illt table 52.

The pressing tool 53 is a rod 56A of a press machine 56, which is made of, for example, a hydraulic cylinder and is held by an upright support plate 55.
A pressing plate 57 is attached so as to be movable back and forth in parallel with the side plate 51, and the pressing plate 57 is held so that it cannot be tilted by inserting a guide shaft 58 extending from the back side of the pressing plate 57 into the support plate 55.

Therefore, the holder 3 consists of a pair of concave grooves 2 of the side beams 2 arranged parallel to each other with the slope 30A1 facing the front plate 50 and the lower end 2B facing upward.
3, the base frame 32 having a width dimension can be formed by operating the press machine 56 and pressing the space between the side girders 2 while the mock metal fittings 31 are temporarily attached and the embedding plate 21 is temporarily placed. Also, in the pressed state, the side beams 2 can be held parallel to each other in the longitudinal direction. Further, a dowel hole 5 is formed in the end edge 2A of the stringer 2, in this example, on the slope 30A1, using a dowel hole punching tool 6. In addition, a locking pin (not shown) is provided on each inner surface of the side plate 51 and the pressing plate 57, which engages with the two end edges of the side spar 2 to prevent the side spar 2.2 from shifting in the longitudinal direction during the pressing. ) may be provided, or it may be preferable to prevent the displacement by a front plate 51 as in this example.

The dowel hole drilling tool 6 consists of a pair of drill tools 7, a support 9 and a position 1.
It includes an adjusting tool 13, a lifting tool 15, and a rotating tool 16, and in this example, it is provided on a rectangular frame 59 with a side frame portion 59A oriented parallel to the longitudinal direction.

The lifting tool 15 has a guide shaft 65 and a screw shaft 66 vertically held between upper and lower mounting plates 61 and 62 installed between the columns 60 of the side frame portion 59A, and the guide shaft 65 and The screw shaft 66 has a guide tube 67 through which the guide shaft 65 is inserted.
and a U-shaped screw engagement vi69 that screws together the screw shaft 66 with bent pieces at both ends thereof, and the elevating plate 70, which moves up and down by the screw rotation of the screw shaft 66, is oriented parallel to and perpendicular to the longitudinal direction. are connected. The lifting tool 15 has a gear body at the lower end of a screw shaft 66 that projects downward from the mounting plate 62. ! The gear body 71A has a handle 72A at its outer end and a manual shaft 72 which is pivoted on a hanging piece 62A of the mounting plate 62.
It meshes with the gear body 72B at the inner end. Further, the lifting tool 15 is provided with a rotating tool 16.

In this example, the rotating tool 16 is a drive unit having a gear body 73A at its inner end and a handle attached to the other end of a manual shaft 75 attached to the elevating plate 70 via a reduction gear box 76 of a known configuration. 77, and a support shaft 7 pivoted at right angles to the elevating plate 7°.
The operating part 8.0 has a gear body 73B fixed to the inner end thereof which meshes with the gear body 73A, and a long U-shaped support plate 9 is spanned between the gear bodies 73B. Therefore, rotating tool 1
Is 6 a gear body operated by a handle? The support plate 9 can be rotated around the support shaft 79 by the reduced rotation of 3A, that is, around the axis perpendicular to the vertical plane extending in the longitudinal direction.

Further, in this example, by fixing the rotation angle of the manual shaft 75 by an appropriate locking means 81 provided on the side of the reduction gear box 76, the support plate 9 can be maintained at a desired rotation angle.

As shown in FIG. 3, as for the rotating tool 16, a support shaft 79 protruding from the end of the support plate 9 is pivoted by an elevating plate 7o, and a manual shaft 72 at the tip thereof is pivoted by the elevating plate 7o. pinion 8
4 is guided up and down by a guide shaft 82.
At the same time, the protruding pin 8 on the side surface of the rack body 83
3A may be inserted into the elongated hole 83B at the end of the support plate 9,
The rotating tool 16 can have various configurations.

Note that a position adjustment tool 13 is attached to the support plate 9.

The position adjustment tool 13 includes a base plate 10 for attaching the drill tool 7, and a longitudinal adjustment means 11 and a lateral adjustment means 12 for repositioning the base plate 10 in the longitudinal direction and at right angles to the longitudinal direction.

The lateral adjustment means 12 includes vertical pieces 85 on both side edges of the support plate 9.
A pair of guide shafts 86 extend parallel to each other and at right angles to the longitudinal direction, and one end is supported by the vertical piece 85, and the other end is supported by the vertical piece 87 that stands approximately at the center of the support vi9. The guide shaft 86 is parallel to the guide shaft 86 (a threaded shaft 89, a guide part 90 through which the guide shaft 86 is inserted, and a threaded part 91 into which the threaded shaft 89 is threaded) are respectively formed from a lateral moving table 92 protruding from the lower surface. be done.

Further, the protruding end of the screw shaft 89 protruding from the vertical piece 87 has a
A manual handle 93 is attached, so that the handle 93
By the screw rotation of the screw shaft 89, the lateral movement table 92 can be moved along the guide shaft 86, that is, in a direction perpendicular to the longitudinal direction. Further, the lateral direction adjustment means 12 includes a longitudinal direction adjustment means 11.
are linked.

The longitudinal adjustment means 11 includes a guide shaft 95 that extends parallel to each other along the longitudinal direction between vertical pieces 92A that stand up at the front and rear ends of the lateral moving table 92, and a handle 96A at the rear end.
a screw shaft 96 which is parallel to the guide shaft 95 and pivoted between the vertical pieces 92A; a guide portion 97 which is expanded on the lower surface of the base plate 10 and through which the guide shaft 95 is inserted; 9
6 and a threaded portion 98 that is threadedly engaged with the threaded portion 98 .

Therefore, the longitudinal adjustment means 11 can move the base plate 10 back and forth along the longitudinal direction by screwing the screw shaft 96 by the handle 96A. Further, a drill tool 7 is attached to the upper surface of the base plate 10 so as to direct a drill 99 in the longitudinal direction and project forward.

In this example, the drill tool 7 is a well-known drilling machine that incorporates a retractable tool such as a cylinder. The dowel holes 5 can be bored at any depth in the slope 30A1 of the side girder 2 by extending and retracting with a predetermined stroke, and the drilling position and drilling angle can be controlled by the lateral adjusting means 12, the lifting tool 15, and the rotating tool. 16, it can be freely adjusted.

Further, the front-back reversing device 39 includes a rotary conveyor 105 that rotates together with a rotary shaft 103 between frame plates 102 raised by a base plate 101, as shown in FIGS. 4(a) and 4(b).
A fixed conveyor 106 facing the rotary conveyor 105 is provided by reversing the rotary conveyor 105 by 180 degrees.

The rotary conveyor 105 has arm portions 109A extending perpendicularly to the rotary wheel 103, and is arranged between the arm portions 109A of a pair of arms 109 that are fixed to the rotary shaft 103, with the conveyance direction being parallel to the rotary shaft 103. The conveyor 110 for storing semi-finished products 32B@ is passed through the rack, while an intermediate conveyor 113 whose conveyance direction is the same as that of the conveyor 110 is installed between the rod ends of a pair of cylinders 111 attached to the side surfaces of the arm part 109.
A side plate 112 is installed with the side plate 112 facing the rotating shaft 103. In addition, the side plate 112 has a clamp piece 112 protruding from its upper end, which is bent inward at a height that exceeds the upper edge of the semi-finished product 32B placed on the upper surface of the conveyor 110, and the conveyor 113 and the side plate Each lower edge of the conveyor 112 is positioned higher than the transport surface of the conveyor 110. Furthermore, the conveyor 113 is attached to the raised edge 109B of the arm 109.
A conveyor 115 facing the arm 109 is attached via a side plate 116, while a cylinder 117 on the side of the arm 109 extends and retracts, and the lower surface of the cylinder 117 is attached to the clamp piece 112.
A hook 119 is provided with a protruding piece 119A that rotates from a horizontal position at the same height as A to a vertical flip-up position, and a chain attached to the output shaft of the electric motor M with a speed reducer is attached to the rotating shaft 103 at its protruding end. Car 120 and endless chain 12
A chain wheel 122 linked via 1 is attached.

Therefore, as shown in FIG. 4(b), the rotary conveyor 105 places the semi-finished product 32A conveyed from the first processing conveyor 37 on the upper surface of the conveyor 110, operates the cylinder 111, and operates the side plate 112. By moving parallel inward, the semi-finished product 32A is held between the conveyors 113 and 115 while one upper edge 32A1 is locked by the clamp piece 112A.

Furthermore, the hook 119 is rotated by the cylinder 117, and the protruding piece 119A is at a position where the protruding piece 119A becomes approximately horizontal.
19A locks the other upper edge 32A2 of the semi-finished product 32A. Thereafter, by driving the electric motor M, the rotary conveyor 105 can transfer the semi-finished product 32A to the upper surface of the fixed conveyor 106 while turning the semi-finished product 32A 180 degrees from front to back.

In this example, a table 124 is erected on the upper surface of the base plate 101, and can horizontally support the conveyor 110 by supporting the lower edge of the arm portion 109A.

Further, the fixed conveyor 106 includes a conveyor 125 mounted on the upper surface of the underframe 123, and a conveyor 125 that is pivotally supported on the underframe 123 and mounted on the underplate 10.
Rotating frame 1 is held so as to be able to flip up from a hanging downward position to a horizontal position by extension and retraction of a cylinder 126 attached to 1.
A lift conveyor 127 is provided at 28, and a passage for workers to pass is formed by the hanging of the lift conveyor 127.

As shown in FIGS. 5 to 7, the vertical/horizontal reversing device 43
A horizontal frame 135 has a U-shaped receiving fitting 133 on its lower surface, which is rotatably supported on a supporting shaft 132 through which a supporting fitting 131 is inserted. and a vertical frame 136 rising parallel to the horizontal frame 135, and the rod end of a cylinder 139 attached to the lower surface of the base plate 130 is coupled to a projecting piece 140 hanging down at the center of the lower surface of the horizontal frame 135. As a result, the frame 137 moves vertically around the support shaft 132 as the cylinder 139 extends and retreats.
is rotated rearward within an angular range of approximately 90 degrees until the position is approximately horizontal.

Further, the vertical/horizontal reversing device 43 includes conveyors 141 and 142 on the upper surfaces of the horizontal frame 135 and the vertical frame 136, respectively.
At the same time, a support tube 147 having a damper mechanism and supporting the horizontal frame 135 on its lower surface is attached to the base plate 1.
30, the horizontal frame 135 is supported substantially horizontally.

Therefore, as shown in FIG. 7, the stringer 2 is conveyed upward and downward from the second processing conveyor 40 onto the upper surface of the conveyor 141 of the vertical/horizontal reversing device 43 in which the pallet 41 is vertically propped up along the conveyor 142. After arranging a large number of finished products 32B in sequence, the cylinder 139 is actuated and the frame 1 is moved in an angle range of 90 degrees where the vertical frame 136 is horizontal.
37 toward the rear, the finished product 3
2B-- are stacked in multiple stages on the upper surface of the baren) 41.

In addition, on both side edges of the horizontal frame 135, in this example, there is a flip-up conveyor 1 that rotates from a hanging position to a horizontal position by the extension and retraction of a cylinder 145 attached to the lower surface of the horizontal frame 135.
46 are respectively pivotally mounted.

In this way, the manufacturing line L uses the holders 3 and 4 that hold the base frame 32 while adjusting the width while machining dowel holes in the stair stringer 2.
Since this is done using a dowel hole drilling tool 6 whose position can be adjusted in the axial direction, various types of dowel holes 5 depending on the type of stairs can be formed efficiently and accurately, which can greatly contribute to high quality, low volume production of stairs. .

Furthermore, since the half-finished products 32A on the stairs can be safely and efficiently turned inside out by the front-back reversing device 39, automatic conveyance of the line L is possible, and the conveyance efficiency and the safety of the conveyance work can be improved.

In addition, the finished product 3 of stairs, which is a heavy object, is
2B can be easily and safely stacked on the pallet 41 in multiple stages, increasing the efficiency of carrying out work and improving the safety of the work.

[Effects of the Invention] As described above, the stair stringer dowel hole machining device of the present invention is capable of moving the drill tool in the front and rear direction using a position adjustment tool having a front and back adjustment means and a lateral adjustment means, a lifting tool, and a rotating tool. , it is supported so that its position can be freely changed along four directions: horizontal direction, height direction, and inclination angle, so it is highly versatile and can be used to accurately and efficiently drill various dowel holes according to the type of stairs. This can greatly contribute to improving the product quality and productivity of stairs that can be formed. In addition, since the device for drilling dowel holes for stair stringers simultaneously drills dowel holes on the edges of a pair of stringers that are held with a width dimension by a holder, it is easier to drill holes than conventional methods that drill holes on each side of the stringer. The number of processing steps can be halved, and variations in pitch dimensions between dowel holes caused by component errors and assembly errors can be prevented, and many other effects can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a layout diagram showing a manufacturing line for stairs using the present invention, FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG.
The figure is a partial perspective view showing another embodiment of the rotating tool, and FIG.
) to (b) are perspective views and operational views showing the front/back reversing device, Figs. 5 to 7 are front views, plan views, and side views showing the vertical/horizontal reversing device, and Figs. FIG. 9 is a sectional view showing a groove, FIG. 9 is a perspective view showing a staircase, FIGS. 10(a) to 10(f) are schematic views illustrating the operation of a manufacturing line, and FIG. 11 is a sectional view illustrating a conventional technique. 2 - Side girder, 2A, one end edge, 3 - Holder, 5 - Dowel hole, 6 - Dowel hole puncher, 7 - Drill tool, 9 - Support plate, 10 - Base plate,
11-- Front-back adjustment means, 12-- Lateral adjustment means, 13-- Position adjustment tool, 15-- Lifting tool, 16
・-・Rotating tool, 20-・-Stairs. 3. Figure 8 (a) Figure 11

Claims (1)

[Claims] (1) Consists of a holder that holds a pair of stringers for forming stairs in parallel with their longitudinal directions aligned, and a dowel hole puncher that punches dowel holes in the edges of the stringers held by the holder. , and the dowel hole drilling tool includes a pair of drill tools for drilling the dowel holes, a support plate, and a base plate provided on the support plate to which the drill tools are attached, and the base plate is rotated in the longitudinal direction and the support plate. a position adjustment tool having a longitudinal adjustment means and a lateral adjustment means for changing the position at right angles to the longitudinal direction; a lifting tool for raising and lowering the support plate; A dowel hole machining device for stair stringers, which is equipped with a rotating tool that rotates the stair stringers.