JP4050558B2 - Wedge for fixing tread - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wedge for fixing a tread.
[0002]
[Prior art]
Conventionally, the following wedges for fixing this type of tread are known.
Below the treads that are fitted in the treadboard insertion grooves that open to the front and inward, which are formed on the inner side surface of the stairs side girders (surface that faces the center of the left and right direction of the stairs), A wedge for fixing a tread board inserted in a gap formed between the lower side surface and the wedge for fixing the tread board is formed such that the thickness in the vertical direction decreases as it goes from the front end to the rear end. Are known.
[0003]
[Disadvantages of the prior art]
The conventional wedge for fixing the tread has the following drawbacks.
Since the conventional wedge for fixing the tread was designed to strike the front end with a hammer or the like, the front and rear length of the wedge for fixing the tread is shorter than the front and rear length of the tread plate insertion groove. When even the front end fits in the tread plate insertion groove, a bar with a length protruding forward from the tread plate insertion groove in a state where it hits the front end of the tread plate fixing wedge is connected to the front end of the tread plate fixing wedge. In this case, there is a drawback in that it is difficult to perform the operation of hitting the wedge for fixing the tread board through the bar material.
[0004]
[Means for Solving the Problems]
The present invention employs the following means in order to eliminate the above disadvantages.
According to the first aspect of the present invention, the lower surface of the tread plate and the lower side surface of the tread plate insertion groove are formed below the tread plate that is formed in the inner side surface of the side girder of the staircase and is fitted in the tread plate insertion groove that opens forward and inward. a step board wedge for fixing to be inserted into a gap formed between a body that is adapted vertically thickness decreases toward the rear end from the front end, is provided continuously to the front of the body, some are protruded inwardly from the tread plate fitting grooves, in which and a struck protrusion is configured to be an inclined surface to retreat in accordance with the front end surface toward the inside.
Invention 請 Motomeko 2, wherein at least the lower portion of the inner surface of the hitting protrusion is made an inclined surface facing the lower, through-holes before one end is the other end on the inclined surface so as to be positioned on the outer surface It is formed in part, the through hole, but the axis of the fitted nail or screw into the through hole of claim 1 Symbol mounting is adapted to permit to be inclined upward from the inside to the outside is there.
According to a third aspect of the present invention, the inner side surface of the hit projection is vertically divided into two, the lower side surface is an inclined surface facing downward, the upper side surface is an inclined surface facing upward, and one end is lower A through hole is formed in the front portion so that the other end is located on the outer surface on the side surface, and the axis of the nail or screw fitted in the through hole is inclined upward from the inside toward the outside. In addition, a through hole is formed in the front part so that one end is located on the upper side and the other side is located on the outer side, and this through hole is formed of a nail or screw fitted in the through hole. axis is of claim 1 Symbol mounting is adapted to permit to be downwardly inclined from the inside to the outside.
[0005]
【The invention's effect】
The present invention has the following effects by the configuration as described above.
According to the invention of claim 1, the hitting protrusion that protrudes inward from the tread plate insertion groove can be hit with a hammer or the like, so that the front and rear length of the tread plate fixing wedge is shorter than the front and rear length of the tread plate insertion groove, Even when the front end of the tread plate fixing wedge is fitted into the tread plate insertion groove, it is easy to perform the operation of driving the tread plate fixing wedge.
In addition, when the hit projection is struck with a hammer or the like, a force that moves outward to the wedge for fixing the tread plate, that is, a force toward the inner side of the tread plate fitting groove acts on the wedge for fixing the tread plate. It is easy to bring the fixing wedge into close contact with the back side of the tread board fitting groove.
According to the invention of claim 2 , nails or screws are inserted into the through-holes in a state where their axial centers are inclined upward from the inside to the outside, that is, in a state where the heads of the nails or screws are directed obliquely downward. Since it can be fitted to the side girders, the work can be performed in a state where the tread is less likely to interfere with the nail driving work and the screw turning work, and as a result, the work is easy to perform.
According to the invention of claim 3 , nails or screws are inserted into the through-holes in a state in which their axial centers are inclined upward from the inside to the outside, that is, in a state in which the heads of the nails or screws face obliquely downward. Since it can be fitted to the side girders, the work can be performed in a state where the tread is less likely to interfere with the nail driving work and the screw turning work, and as a result, the work is easy to perform. In addition, by flipping one treadle fixing wedge upside down, one treadle fixing wedge can be used for both the left and right ones having the above-mentioned effects. Easy to use.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
In this description, “front” refers to the right side of FIG. 1, “back” refers to the left side of FIG. 1, “inside” refers to the front side of FIG.
[0007]
The staircase has a left side girder 1 shown in the figure and a right side girder (not shown) located at a predetermined interval between the left side girder 1 on the front side of the drawing in FIG. The right side girder has the same shape as the image that appears when the left side girder 1 is projected with a mirror placed with its mirror surface facing the left side girder 1, so The side beam 1 will be described in detail.
[0008]
On the inner side surface of the left side beam 1, a tread plate insertion groove 3 that opens forward and inward at predetermined intervals in the height direction is formed. The tread board insertion groove 3 has a lower side surface 3a inclined downward, a horizontal upper side surface 3b, and a vertical rear side surface 3c.
[0009]
An end portion of the tread plate 4 is slid in the tread plate insertion groove 3 from the front to the rear, and a synthetic resin is formed in a gap 5 formed between the lower surface of the tread plate 4 and the lower side surface 3a of the tread plate insertion groove 3. A wedge 7 for fixing the tread board is inserted from the front to the rear.
[0010]
The wedge 7 for fixing the tread plate protrudes inward from a main body 8 whose thickness in the vertical direction becomes thinner as it goes from the front end to the rear end, and a tread plate insertion groove 3 connected to the front portion of the main body 8. And a hit projection 9. The width L of the main body 8 is equal to or substantially equal to the width of the tread plate insertion groove 3, and the width M of the hit projection 9 is about 15 mm.
[0011]
The front end surface 10 of the hit projection 9 is an inclined surface facing inward. That is, the angle α formed by the front end face 10 and the outer face 12 in FIG. 2 is set to about 80 degrees. In the present embodiment, the front end surface of the main body 8 is also an inclined surface connected to the front end surface 10. With such a configuration, if the front end face 10 of the hit projection 9 is struck with a hammer or the like so that the wedge 7 for fixing the tread plate is fitted rearward into the gap 5, the wedge 7 for fixing the tread plate is moved outward. Since the moving force, that is, the force toward the back side surface 3c of the tread plate fitting groove 3 is applied to the wedge 7 for fixing the tread plate, the wedge 7 for fixing the tread plate is easily brought into close contact with the back side surface 3c of the tread plate fitting groove 3. .
[0012]
The inner side surface 11 of the hit projection 9 is vertically divided into two, the lower side surface 11a is inclined downward (inclined surface rising upward), and the upper side surface 11b faces upward. An inclined surface (an inclined surface inclined downward toward the inside) is formed. As shown in FIG. 3, at least one, in this embodiment, two through-holes 14 are arranged at the front of the wedge 7 for fixing the tread so that one end is located on the lower side surface 11a and the other end is located on the outer side surface 12. Is formed. The through hole 14 allows the axis of the nail 17 fitted in the through hole 14 to rise upward from the inside to the outside. The length in the vertical direction of the through hole 14 of the present embodiment is made larger toward the outside for the convenience of manufacturing the wedge 7 for fixing the tread board, but it is not necessary to be so. Nor. In addition, the front-back direction length of the through-hole 14 does not change. With such a configuration, the nail 17 is fitted into the through hole 14 in a state where the axis of the nail 17 is inclined upward from the inside to the outside, that is, with the head of the nail 17 facing diagonally downward, and the left side Since the beam 1 can be reached, the work can be performed in a state in which the tread 4 is unlikely to obstruct the driving work of the nail 17, and as a result, the work is easy to perform.
[0013]
As shown in FIG. 4, at least one, in this embodiment, two through-holes 15 are arranged at the front portion of the tread plate-fixing wedge 7 such that one end is located on the upper side surface 11b and the other end is located on the outer side surface 12. Is formed. The through-hole 15 allows the axis of the nail 17 fitted in the through-hole 15 to be inclined downward from the inside toward the outside. The length in the vertical direction of the through hole 15 of the present embodiment is made larger toward the outside for the convenience of manufacturing the wedge 7 for fixing the tread board, but it is not necessary to be so. Nor. Note that the length of the through hole 15 in the front-rear direction does not change. With such a configuration, the tread board fixing wedge 7 is turned upside down from the state shown in the figure, and the nail 17 is driven into the right side beam through the through-hole 15, so that the tread board 4 is unlikely to obstruct the operation of driving the nail 17. The work can be performed in the state.
[0014]
As is known, a scoring plate 18 is passed between the front end of the lower tread plate 4 and the rear end of the upper tread plate 4.
[0015]
Method of using the embodiment of the invention
Next, a method of using the embodiment of the invention will be described.
After the end of the tread plate 4 is fitted into the tread plate insertion groove 3 of the left side girder 1 and the tread plate insertion groove of the right side girder opposite thereto, the wedge 7 for fixing the tread plate is struck into the gap 5 and the hit projection 9 is struck Insert while doing. Thereafter, a nail 17 is driven into the left side beam 1 through the through hole 14, and a nail 17 is driven into the right side beam through the through hole 15.
[0016]
[Modifications]
A description will be given below of modifications and the like.
(1) The inner side surface 11 may not have the upper side surface 11b. In this case, the wedge 7 for fixing the tread board is manufactured separately for the left side and the right side. In short, the inner surface 11 may only have a lower surface 11a.
(2) A screw may be used instead of the nail 17.
(3) The longitudinal length of the hit projection 9 is arbitrary.
(4) The tread board fixing wedge 7 is also preferably inserted into a gap formed between the lower surface of the tread board around the stairs and the lower side surface of the tread board insertion groove.
[Brief description of the drawings]
FIG. 1 is a side view of an essential part showing an embodiment of the present invention.
2 is an enlarged sectional view taken along line II-II in FIG.
FIG. 3 is an enlarged end view taken along line III-III in FIG. 2;
4 is an enlarged end view taken along the line IV-IV in FIG. 2;
[Explanation of symbols]
1 Left side girder 3 Tread plate insertion groove 3a Lower side surface 3b Upper side surface 3c Back side surface 4 Tread plate 5 Gap 7 Wedge 8 for fixing the tread plate Main body 9 Impacting projection

Claims (3)

A gap formed between the lower surface of the tread plate and the lower side surface of the tread plate insertion groove below the tread plate fitted in the tread plate insertion groove that opens forward and inward, formed on the inner side surface of the side girder of the stairs. A wedge for fixing the tread board inserted ,
A body that is adapted vertically thickness decreases toward the rear end from the front end,
Provided continuously to the front of the body, portions of which protrude inwardly from the tread plate insertion groove, and a struck protrusion is configured to be an inclined surface to retreat in accordance with the front end surface toward the inside Wedge for fixing the tread. At least the lower part of the inner side surface of the hit projection is an inclined surface facing downward, and a through-hole is formed in the front part with one end positioned on the inclined surface and the other end on the outer surface. but wedge for step board fixing according to claim 1 Symbol mounting axis of fitted nail or screw into the through-holes have been made so as to allow the upward slope from the inside to the outside. The inner side surface of the hit projection is vertically divided into two, the lower side surface is an inclined surface facing downward, the upper side surface is an inclined surface facing upward, one end is the lower side surface and the other end is the outer surface. A through hole is formed in the front portion so as to be positioned at the front, and this through hole allows the axis of the nail or screw fitted in the through hole to be inclined upward from the inside to the outside. In addition, a through hole is formed in the front portion so that one end is located on the upper side and the other end is located on the outer side, and the axis of the nail or screw fitted in the through hole extends from the inside to the outside. headed wedge according to claim 1 Symbol placement of step board for fixing are adapted to allow to be a downward slope.

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