JPH0364282B2 - - Google Patents

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. This invention relates to a dowel hole machining device for stair stringers that can improve product quality and productivity.

[Background technology]

When attaching a staircase to a house, generally, as shown in FIG. , the dowel hole E provided in the end edge D1 of the stringer D of the staircase C is fitted into the dowel protrusion B to determine its position.

However, such dowel holes E differ in their formation position, angular slope, depth, etc. depending on the type of stairs, such as the length, width, slope angle, and height of stringers, so when machining them, , a variety of processing tools are required, and since holes are drilled in the stringer D alone before installing other stair components such as the treads F and stubs G, the number of processing steps increases, resulting in extremely high processing efficiency. It was a bad one. 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, for example, in the treads F and sash plates G, resulting in poor product quality. It was also the cause of

[Purpose of the invention]

In view of this situation, the present invention aims to simultaneously form dowel holes in each 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. Therefore, it is an object of the present invention to provide a dowel hole machining device for a stair stringer which can solve the above-mentioned problems.

[Disclosure of the invention]

The present invention includes a holder 3 that holds a pair of side beams 2, 2 for forming stairs in parallel with their longitudinal directions aligned, and a dowel hole 5 formed in an edge 2A of the side beam 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 direction 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.
a dowel hole in a stair stringer, comprising: a lifting tool 15 for raising and lowering the support plate 9; and a rotating tool 16 for rotating the support plate 9 about an axis perpendicular to the vertical plane extending in the longitudinal direction. With the processing device 1, it is possible to form dowel holes having a desired angular slope and depth at appropriate positions with high precision and efficiency, thereby improving the product quality of stairs and their productivity.

Below, the stair stringer dowel hole machining device 1 of the present invention is as follows:
One embodiment will be described based on the drawings, taking as an example a case in which the device is disposed on a manufacturing line L for producing stairs 20 shown in FIG.

In addition, the stairs 20 have a built-in board 21 on the inward surface 2S.
and a pair of side beams 2, 2 in which grooves 23, 24 for inserting the footboards 22 are continuously formed in a zigzag shape, and a plunger plate 21 installed between the grooves 23 facing each other in the side beams 2. , a footboard 2 installed between the grooves 24
2 and the lower end 2B of the side girder 2.
a decorative material 26 that protects the edges of the back plate 25; and a decorative material that is fitted onto the upper end 2C of the side beam 2 to protect the upper end 2C and improve its appearance. 27, and in this example, the surface of the staircase 20 is covered with a packaging protective sheet 29 spanning between the stringers 2.

Furthermore, both end edges 2A of the stringer 2 are formed with a slope 30A that becomes vertical and a slope 30B that becomes horizontal when the stairs 20 are attached to the house, and each slope 30A1 facing upward is provided with a slope 30A that is connected to the beam member A. The dowel hole 5 for inserting the dowel B to be provided is on the slope 30A1.
is formed at right angles to.

Further, in this example, the groove 23 has a trapezoidal cross section in which the groove bottom width d1 is larger than the opening width d2, as shown in FIGS. 8a and 8b.
1 to the groove 23.
By driving or pressing, the recess plate 21 is irremovably fixed to the side girder 2 with one 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 lower end 2B.

Therefore, in this example, the stairs 20 are formed in the following order. First, temporarily place the wedge fittings 31 on both ends between the facing grooves 23 of the side beams 2, 2 arranged in parallel, and then move the side beams 2, 2 inwardly. By pressing the opposite side, as shown in FIG.
A base frame body 32A consisting of the following is assembled. Also, the base frame body 3
While drilling dowel holes 5 in each slope 30A of 2A,
The base frame body 32A in which the dowel holes 5 are formed has a bottom end 2 facing upward, with a tread plate 22 between the grooves 23 facing each other.
Insert the slide from B and nail it in place, and then attach the side girder 2.
A semifinished product 32B shown in FIG. 10b is formed by sequentially attaching a back plate 25 and a decorative material 26 between the lower ends 2B. Further, as shown in FIG. 10c, 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.
The finished product 32C shown in FIG. 10d and FIG. 9 is further coated with a protective sheet 29 on its surface.
The stairs 20 are formed as follows.

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, a three-way supply conveyor 36 that carries in the side girders 2 and sash plates 21 from an appropriate stockyard, and the supply conveyor 3
Stair stringer dowel hole machining in which a base frame body 32 is formed by the stringer 2 and the sash plate 21 carried in from 6, and dowel holes 5 are bored in the stringer end edge 2A of the base frame body 32. A tread plate 2 is attached to a base frame body 32 with dowel holes that is conveyed from the apparatus 1 and the dowel hole processing apparatus 1 for the stair stringer.
2. Install the back plate 25 and decorative plate 26 from above.
A first processing conveyor 37 that forms a semi-finished product 32B shown in FIG. 0 b, and the first processing conveyor 37
a front-back reversing device 39 for reversing the semi-finished product 32B conveyed from the top and bottom 180 degrees as shown in FIG. 10c;
The semi-finished product 32 that has been reversed by the front-back reversing device 39
The decorative material 27 and the protective sheet 29 are attached to B from above to form the finished product 32B shown in FIG. 10d.
The processing conveyor 40 and the assembly 42 formed by juxtaposing a plurality of finished products 32C with the stringers 2 facing up and down on a pallet 41 propped up horizontally as shown in FIGS. 10 e to f are inverted 90 degrees. Vertical and horizontal inversion device 4 that stands up and stacks the finished products 32C in multiple stages on the upper surface of the pallet 41
3 and a carry-out conveyor 45 for carrying out the erected assembly 42, and the supply conveyor 36, the first processing conveyor 37, and the second processing conveyor 40 are provided with structural members necessary for assembling the stairs as appropriate. Stockyards for storage 46A, 46B, 46C, 4
6D is installed 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 place P in front of the dowel hole processing device 1 for the stair stringer, and 3
6A is formed from an elevating conveyor 36B having two roller conveyors 36B1, 36B2, and 36B3 arranged perpendicularly at the downstream end thereof and feeding the loading plate 22 to the carry-in location P, and the elevating conveyor 36B At times, the conveyance surface is raised above the conveyor 36A, and when it is on standby, it is lowered. Therefore the supply conveyor 36
By the vertical movement of the vertical conveyor 36B, the structural members can be transported from three directions without colliding with each other. Note that carrying in from three directions is adopted in order to cope with the fact that the components of the staircase 20 are diverse depending on the type of staircase 20, and therefore to accommodate 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.

In this example, the first processing conveyor 37 and the second processing conveyor 40 are two-strip roller conveyor bodies, and the above-described components are attached to the upper surfaces of each of them. In this example, the second processing conveyor 40 is provided with a well-known table lifter 40A 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 the first
~2 As shown in Figure 2, the holder 3 and the dowel hole puncher 6
The holder 3 includes a mounting table 52 with a front plate 50 and a side plate 51 on the inward edge and one side edge, respectively.
and a pressing tool 53 disposed on the other side edge of the mounting table 52.

The pressing tool 53 is a press machine 56 that is made of, for example, a hydraulic cylinder and is held on an upright support plate 55.
A press plate 57 is attached to the rod 56A so as to be movable in parallel with the side plate 51.
It is inserted into and held in such a way that it cannot be tilted.

Therefore, the holder 3 connects the slope 30A1 to the front plate 50.
In addition, the press machine 56 is operated in a state where the wedge fittings 31 are temporarily attached and the drawer plates 21 are temporarily placed between the concave grooves 23 of the pair of side beams 2 arranged in parallel with the lower ends 2B facing upward. By pressing between the side beams 2, the base frame body 32 having a width dimension can be formed, and in the pressed state, the side beams 2 can be aligned in the longitudinal direction and held in parallel. Further, a dowel hole 5 is formed in the end edge 2A of the side beam 2, in this example, on the slope 30A1, using a dowel hole punching tool 6. Note that locking pins (not shown) are provided on the inner surfaces of the side plates 51 and the pressing plate 57 to engage with both end edges 2A of the side beams 2 to prevent the side beams 2, 2 from shifting in the longitudinal direction during the pressing. Alternatively, as in this example, a front plate 51 may be used to prevent the displacement.

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

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 plate 69 into which the screw shaft 66 is screwed together with bent pieces at both ends. A movable elevating plate 70 is connected parallel to and perpendicular to the longitudinal direction. Note that the lifting tool 15 is attached to the mounting plate 62.
A gear body 71 is attached to the lower end of the screw shaft 66 that protrudes downward from the
The gear body 71A has a handle 72A at its outer end and a hanging piece 62 of the mounting plate 62.
It meshes with a gear body 72B at the inner end of the manual shaft 72 which is pivotally supported by A. Further, the lifting tool 15 is provided with a rotating tool 16.

In this example, the rotating tool 16 has a gear body 73A at the inner end.
a drive unit 77 having 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 well-known configuration, and the elevating plate 70
The gear body 7 is attached to the inner end of a support shaft 79 that is pivoted at right angles to the
Operating part 8 fixed gear body 73B meshing with 3A
0, and a long U-shaped support plate 9 is spanned between the gear bodies 73B. Therefore, the rotating tool 16 can rotate the support plate 9 around the support shaft 79, that is, around the axis perpendicular to the vertical plane extending in the longitudinal direction, by the deceleration circuit of the gear body 73A by operating the handle.

Further, in this embodiment, by fixing the rotation angle of the manual shaft 75 by a suitable 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.
At the same time, the pinion 84 at the tip of the manual shaft 72, which is pivoted by the lifting plate 70, is engaged with the rack body 83 that is guided up and down by the guide shaft 82, and the protruding pin 83A on the side of the rack body 83 is It may be inserted through the elongated hole 83B at the end of the support plate 9, and various configurations of the rotating tool 16 can be used.

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

The position adjustment tool 13 is a base plate 1 for mounting the drill tool 7.
0, 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 a pair of guide shafts 86 that extend parallel to each other and at right angles to the longitudinal direction between the vertical pieces 85 on both ends of the support plate 9, and one end of which is connected to the vertical piece 85, and the other end of which is connected to the vertical piece 85. A threaded shaft 89 that is pivotally supported by a standing piece 87 that stands up approximately at the center of the support plate 9 and is oriented parallel to the guide shaft 86, a guide portion 90 that passes through the guide shaft 86, and a screw thread that engages with the threaded shaft 89. Part 9
1 and a horizontally movable table 92 each protruding from the lower surface.

A manual handle 93 is attached to the protruding end of the screw shaft 89 that protrudes from the vertical piece 87. Therefore, by the screw rotation of the screw shaft 89 by the handle 93, the lateral movement table 92 is moved to the guide shaft 86. , i.e. in a direction perpendicular to the longitudinal direction. Further, the longitudinal direction adjustment means 11 is linked to the lateral direction adjustment means 12.

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

Therefore, the longitudinal direction adjustment means 11 is the handle 96
By the screw rotation of the screw shaft 96 by A, the base plate 10
can be moved back and forth along the longitudinal direction. 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 having a built-in extending/retracting tool such as a cylinder.
The dowel holes 5 can be drilled at any depth in the slope 30A1 of the side girder 2 by the front and back positioning by the drill tool 1 and the extension/retraction movement of the drill tool 7 at a predetermined stroke. It can be freely adjusted by the means 12, the lifting tool 15, and the rotating tool 16.

Further, as shown in FIGS. 4a to 4b, 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, and a 180-degree rotation of the rotary conveyor 105. A rotary conveyor 105 and a fixed conveyor 106 facing each other in a reversing position are provided.

The rotary conveyor 105 has an arm portion 109A extending perpendicularly to the rotary shaft 103.
The arm portions 1 of the pair of arms 109 fixed to the
A conveyor 110 for placing the semi-finished product 32B whose conveyance direction is parallel to the rotation axis 103 is installed between 09A, while a conveyor 110 for placing the semi-finished product 32B whose conveyance direction is parallel to the rotation axis 103 is installed between the rod ends of a pair of cylinders 111 attached to the sides of the arm part 109. A narrow conveyor 113 that is the same as the conveyor 110
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 112A protruding from its upper end that 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. The lower edge of each conveyor 11
0 Position it higher than the conveyance surface. Also arm 109
A conveyor 115, which faces the conveyor 113, is attached to the raised edge 109B of the arm 109 through a side plate 116, while a cylinder 117 on the side of the arm 109 extends and retracts, and its lower surface is at the same height as the clamp piece 112A. A protruding piece 11 that rotates from a horizontal position to a vertical flip-up position.
A hook 119 having a diameter of 9A is provided, and the rotary shaft 103 is equipped with an electric motor M with a speed reducer at its protruding end.
A chain wheel 122 is attached which is connected to a chain wheel 120 provided on the output shaft of the motor through an endless chain 121.

Therefore, as shown in FIG. 4b, 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 moves the side plate 112.
by translating inward one upper edge 32
While holding A1 with the clamp piece 112A, the semi-finished product 3
2A is held between conveyors 113 and 115. Further, when the hook 119 is rotated by the cylinder 117 and the protruding piece 119A is in a substantially horizontal position, the protruding piece 119A is attached to the other upper edge of the semi-finished product 32A.
2A2 is neglected. Thereafter, by driving the electric motor M, the rotary conveyor 105 moves the semi-finished products 32
While turning A 180 degrees from front to back, the fixed conveyor 10
6 Can be transferred to the top surface.

In this example, the table 1 is placed on the top surface of the base plate 101.
24 is erected and can support the conveyor 110 horizontally by supporting the lower edge of the arm portion 109A.

Furthermore, the fixed conveyor 106 can be freely raised from a hanging downward position to a horizontal position by extending and retracting a conveyor 125 mounted on the upper surface of an underframe 123 and a cylinder 126 that is pivotally supported by the underframe 123 and attached to the base plate 101. A flip-up conveyor 127 is provided on a rotating frame 128 that is held, and a passage for workers to pass is formed by the hanging of the flip-up conveyor 127.

As shown in FIGS. 5 to 7, the vertical/horizontal reversing device 43 has a U-shaped receiving bracket 133 on its lower surface, which is rotatably supported on a support shaft 132 through which a supporting bracket 131 raised on a base plate 130 is inserted. horizontal frame 135
and the support shaft 13 at the rear edge of the horizontal frame 135.
2 and a vertical frame 136 rising parallel to the base plate 1.
A projecting piece 140 that hangs down from the center of the lower surface of the horizontal frame 135 at the rod end of the cylinder 139 attached to the lower surface of the horizontal frame 135.
By being pin-coupled to the frame 137, the frame 137 rotates rearward about the support shaft 132 as the cylinder 139 extends and retracts to a position where the vertical frame 136 becomes approximately horizontal within an angular range of approximately 90 degrees.

Further, the vertical/horizontal reversing device 43
5. Conveyors 141 and 142 are installed on each upper surface of the vertical frame 136, and a support tube 147 having a damper mechanism and supporting the horizontal frame 135 on its lower surface is erected on the base plate 130. 135 is supported substantially horizontally.

Therefore, as shown in FIG. 7, the stringer 2 is placed upwardly and downwardly 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 a large number of finished products 32B to be transported are lined up in sequence,
By operating the cylinder 139 and rotating the frame 137 backward within a 90 degree angle range where the vertical frame 136 is horizontal, the finished product 32
B... are stacked in multiple stages on the upper surface of the pallet 41.

In addition, in this example, cylinders 1 attached to the lower surface of the horizontal frame 135 are attached to both side edges of the horizontal frame 135.
A flip-up conveyor 146, which rotates from a hanging position to a horizontal position by extension and retraction of 45, is pivotally attached to each.

In this way, the production line L uses the holder 3 that holds the base frame 32 while adjusting the width and the dowel hole punching tool 6 whose position is adjustable in four axes directions to machine the dowel holes in the stair stringer 2. Therefore, various types of dowel holes 5 according to the type of stairs can be formed efficiently and accurately, and this can greatly contribute to high-quality, low-volume production of stairs.

In addition, the half-finished staircase 32A is made by the front-back reversing device 39.
Since it is possible to completely and efficiently turn the inside out, it is possible to automatically transport the line L, and it is possible to improve the transport efficiency and the safety of the transport work.

Furthermore, the vertical and horizontal reversing device 43 allows the finished staircase products 32B, which are heavy items, to be easily and safely stacked in multiple stages on the pallet 41, thereby increasing the efficiency of carrying out work and improving the safety of the work.

〔Effect of the invention〕

As described above, the stair stringer dowel hole machining device of the present invention uses a position adjustment tool having a longitudinal adjustment means and a lateral adjustment means, an elevating tool, and a rotation tool to adjust the drill tool in the longitudinal direction, lateral direction, and height. Since the support can be freely repositioned in four directions (vertical direction and inclination angle), it is highly versatile and allows for accurate and efficient formation of various dowel holes depending on the type of staircase, improving product quality of stairs. and can greatly contribute to improving productivity. In addition, the device for drilling dowel holes for stair stringers simultaneously drills dowel holes in the edges of a pair of stringers that are held at the width dimension by a holder, compared to conventional methods that drill holes in each stringer individually. The number of processing steps can be halved,
In addition, many effects can be achieved, such as preventing variations in the pitch dimensions between dowel holes caused by component errors and assembly errors.

[Brief explanation of drawings]

Fig. 1 is a layout diagram showing a manufacturing line for stairs using the present invention, Fig. 2 is a perspective view showing one embodiment of the invention, and Fig. 3 is a partial perspective view showing another embodiment of the rotating tool. , FIGS. 4a to 4b are perspective views and operational views of the front/back reversing device, FIGS. 5 to 7 are front views, plan views, and side views of the vertical/horizontal reversing device, and FIGS. 8 a to b
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 diagrams illustrating the operation of a manufacturing line, and FIG. 11 is a sectional view illustrating a conventional technique. 2...Stringer, 2A...Edge, 3...Holder, 5
... Dowel hole, 6 ... Dowel hole punching tool, 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.

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 machining 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 moved in the longitudinal direction and longitudinal direction. a position adjustment tool having a longitudinal adjustment means and a lateral adjustment means for changing the position at right angles to the support plate, a lifting tool for raising and lowering the support plate, and rotating the support plate around an axis perpendicular to the vertical plane extending in the longitudinal direction. A dowel hole machining device for stair stringers, which is equipped with a rotating tool for moving the stair stringers.