JP6817695B2 - Manufacturing method of sheet-attached treads for stairs - Google Patents

Description

The present invention relates to a method for manufacturing a sheet-attached tread plate for a round staircase.

Of the stairs constructed in the house, the stairs with a structure that allows the stairs to go up and down while turning without a landing in the folded stairs that can be folded 90 degrees or the folded stairs that turn back 180 degrees are called round stairs and are saved. It has become widespread because it can be installed in spaces. In the round stairs, the Building Standards Law requires that a tread of 150 mm or more be secured at a position 300 mm from the narrow side of the tread (point in contact with the side of the pillar), and five or more treads in a 90 degree range. Since it is difficult to secure this tread surface for each tread plate, in general, a 90-degree range is composed of 2 to 4 tread plates in a round staircase.

In stairs, in general, the outer end face in the width direction of the tread is abutted against the wall surface, the inner end face in the width direction is abutted against the side surface of the column, and the rear end face is the lower end of the riser plate that closes the space between the tread and the adjacent tread. It is installed while being abutted against the front. Therefore, it is not necessary to apply makeup to these surfaces, but the region from the front surface to the front surface of the upper end of the riser plate on the back surface side through the front end surface (called the step nose) is made of a base material made of plywood or fiberboard. Since it will be exposed, it is necessary to attach a decorative sheet to enhance the design. This situation applies not only to the treads of straight stairs but also to the treads of surrounding stairs.

The treads of the straight stairs have a substantially rectangular planar shape, but the treads of the round stairs have a non-rectangular planar shape and have different planar shapes depending on the number of steps. For example, when the range of 90 degrees is composed of two treads (two-step stairs), as shown in FIG. 4A, two substantially triangular planes (angles on the center side of the pillars are 45 degrees each). Tread plates 1a and 1b having a shape are required, and in order to attach the decorative sheet 3 to the area from the front surface of the tread plates 1a and 1b to the front surface of the upper end of the riser plate on the back surface side through the nose tip surfaces 2a and 2b. While arranging base materials having the same shape as the tread plates 1a and 1b as shown in FIG. 4B and transporting them in the X direction, a long and wide decorative sheet 3 is reeled at a speed synchronized with the transporting speed (FIG. A decorative sheet is attached to the surface of these tread base materials, and the rollers (not shown) arranged on both sides of the transport direction X are pressed against the nose tip surfaces 2a and 2b to attach the decorative sheet. Further, the back side is also attached to the required area on the back side by a roller (not shown). Since the decorative sheet 3 is attached to the tip surface of the nose and its thickness appears in the plan view, the tip surface of the nose is shown by a thick line throughout the drawing.

In addition, when the range of 90 degrees is composed of four treads (four-step stairs), as shown in FIG. 5A, four irregular triangles (the angle on the center side of the pillar is 22.5 degrees each). ), And the treads 4a to 4d are required, and the treads 4a to 4d are kicked from the surface to the tip surface of the stair nose (indicated by a thick line to distinguish and emphasize from other surfaces) 5a to 5d on the back side. In order to attach the decorative sheet 3 to the area up to the front surface of the upper end of the board, base materials having the same shape as the tread plates 4a to 4d are arranged as shown in FIG. 5 (b), and the decorative sheet is formed in the same manner as described above. 3 can be attached. Such affixing work is known in Patent Document 1 and the like below.

Japanese Unexamined Patent Publication No. 2008-133622

As described above, when the rotating staircase is composed of an even number of treads, one set of treads is used so that the nose tip surfaces 2a, 2b; 5a to 5d face each other on both sides in the transport direction X. Since it is easy to extend and arrange them in parallel, the work of attaching the decorative sheet can be smoothly performed, and the area of the decorative sheet 3 to be cut off after the application is relatively small, the decorative sheet 3 is wasted. Can be small. In FIGS. 4 (b) and 5 (b) , the plain portion indicates the decorative sheet 3 placed or attached to the surface of the tread base material, and the vertical line hatching indicates the cut portion of the decorative sheet 3.

However, as shown in FIG. 6, about one set of treads 6a to 6c (the angle on the center side of the pillar is 30 degrees each) used when the range of 90 degrees is composed of three treads (three-step stairs). , The decorative sheet 3 is attached by arranging the step nose tip surfaces 7a to 7c of the base materials in a positional relationship in which they extend in parallel facing both sides of the transport direction X and their rear end surfaces face each other. Since the number of treads (base materials) is an odd number when trying to wear them, as is clear from FIGS. 6 (a) to 6 (c), the cut portion of the decorative sheet 3 no matter how the treads are arranged. Becomes very large and waste becomes large.

In Patent Document 1, for the three treads used for the three-step round staircase, two first-step treads having a substantially triangular plane shape are arranged in the opposite directions, and the three treads have a deformed quadrangular plane shape. An example is shown in which a stepped tread and a third tread having a substantially triangular planar shape are arranged in a predetermined orientation and a decorative sheet is attached to them (see FIG. 3). In addition to making the sheet cut part larger, according to this, a decorative sheet is attached to one set of three + one stepped treads at the same time, and the first step treads with the decorative sheets attached are excessively manufactured. Therefore, the number of treads manufactured by the manufacturing process does not match the number of treads for one set actually used, which is wasteful.

Therefore, the problem to be solved by the present invention is to manufacture a tread plate of a three-step staircase with a good yield by minimizing waste of a decorative sheet.

In order to solve this problem, the present invention according to claim 1 is a method of simultaneously manufacturing one set of decorative sheet-attached treads with three pieces of a lower tread, a middle tread, and an upper tread constituting a three-step staircase. Therefore, a total of 6 tread board base materials for the 2 sets of tread boards are combined by 2 pieces each, and 3 pairs of tread board pairs are arranged at intervals in the transport direction, and the tip of the stair nose of the tread board base material of each tread board pair. While the surfaces are aligned on both sides in the transport direction and the rear end faces of the tread plate base materials are arranged in a positional relationship facing each other at intervals and transported in the transport direction, one decorative sheet is transferred to these six sheets. After being rolled up from the front surface of the tread plate base material to the back surface through the tip surface of the stair nose and continuously attached, the decorative sheet is placed between the tread plate pairs in the transport direction and between the rear end surfaces of the tread plate base material in each tread plate pair. This is a method for manufacturing a sheet-attached tread plate for a round staircase, which is characterized by cutting with a sheet and then cutting an unnecessary part of a decorative sheet .

According to the second aspect of the present invention, in the method for manufacturing a sheet-attached tread plate for a round staircase according to claim 1, different sets of tread plate base materials are combined to form each tread plate pair, and one of these tread plate pairs is used. The nose tip surfaces of the three tread base materials constituting the set are aligned on one side in the transport direction, and the nose tip surfaces of the three tread base materials constituting the other set are all on the other side in the transport direction. It is characterized in that it is arranged so as to be aligned with.

According to the present invention according to claim 1, since it is possible to simultaneously manufacture two sets of decorative sheet-attached treads constituting a three-step staircase, the number of treads for two sets manufactured in one step. The number of treads for the two sets actually used is the same, the yield is good, and the area of the decorative sheet to be cut off after application is small, so waste can be reduced.

According to the second aspect of the present invention, since the tip surfaces of the nose of the three tread plate base materials constituting one set are arranged so as to be aligned on the same side in the transport direction, the three sheets to which the decorative sheet is attached. By sequentially picking the treads on both sides of the transport device, one side obtains three treads constituting one set, and the other side obtains three treads constituting the other set, which are packed as they are. Just do it. Therefore, the work efficiency associated with packing is improved, and it is possible to prevent accidentally packing another set of treads.

It is a top view which shows the step board for 3 steps around 3 steps which we are going to manufacture by this invention. It is a plan view (a)-(d) which shows some example of the method of manufacturing the step board for 3 steps around 3 steps shown in FIG. 2 is a cross-sectional view taken along the line AA showing the manufacturing method according to the embodiment of FIG. 2A in the order of processes. It is a plan view (a) which shows the tread plate of a two-step staircase, and is a plan view (b) which shows the arrangement relation in the manufacturing method. It is a plan view (a) which shows the tread plate of a four-step staircase, and is a plan view (b) which shows the arrangement relation in the manufacturing method. Plan views (left view) showing the treads of the three-step stairs, and plan views (a) to (c) showing an arrangement example when attempting to manufacture one set of treads for the three-step stairs. Is.

An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 shows two sets of treads used for a three-step staircase having the same structure and shape as that of FIG. These treads have the same shape as the treads 6a to 6c shown in FIG. 6, but are given different reference numerals for convenience, and the treads for the three-step stairs of the first set (set A) are A1, A2 and A3 in order from the bottom. The treads for the three-step stairs of the second set (set B) are shown by B1, B2 and B3 in order from the bottom. In the following embodiment, a total of six treads for these two sets can be manufactured at the same time (on one line). Also in FIG. 1, in order to distinguish and emphasize the other surfaces, in FIGS. 1 and 2 (a) to 2 (d), the tread plates A1, A2, A3; B1, B2, B3, the nose tip surfaces a1, a2. , A3; b1, b2, b3 are indicated by thick lines.

First, a tread plate manufacturing method according to the embodiment shown in FIG. 2A will be described. In this embodiment, the tread plate A3 and the tread plate B1, the tread plate A2 and the tread plate B2, and the tread plate A1 and the tread plate B3 (strictly speaking, they are the base materials, but they have the same planar shape, so they are shown as "tread plate" for convenience. 2 (b) to (d) are also the same.) Are paired, and their nose tip surfaces a3 and b1, a2 and b2, a1 and b3 extend in parallel facing both sides of the transport direction X. It is placed in. In FIG. 2A, in the transport direction X, the pair of the tread plate A3 and the tread plate B1 is arranged at the foremost position, the pair of the tread plate A2 and the tread plate B2 is arranged in the middle, and the pair of the tread plate A1 and the tread plate B3 is arranged at the rearmost position. However, the positional relationship between the front and rear of these tread plate pairs in the transport direction X does not matter, and may be arbitrarily changed.

In this way, each pair of treads is arranged on a conveyor 10 (FIG. 3) such as a conveyor, which is driven at a predetermined speed to convey in the X direction, and a speed synchronized with the transfer speed from a reel (not shown). Send out the long and wide decorative sheet 3 with. The width of the decorative sheet 3 is set at intervals between the tip surfaces a3 and b1, a2 and b2, and a1 and b3 of the nose, which extend in parallel to both sides of the transport direction X in the arrangement state of each pair of treads. It has a dimension in which the plate thickness is added and the area to be rolled up and attached to the back surface side of the tread plate (the length to the entire upper end of the riser plate) is added (see FIG. 3 (b)).

The tread plate manufacturing method according to this embodiment will be further described in detail with reference to FIG. FIG. 3A shows a state in which the base materials 11 of the tread plate A3 and the tread plate B1 are placed on the transport device 10 in the positional relationship as shown in FIG. 2A. A non-slip groove 11b is formed near the nose of the front surface 11a of each base material 11, and a riser plate fitting groove 11d for fitting the upper end of the riser plate (not shown) is formed near the nose of the back surface 11c. Has been done. Further, the nose tip surfaces 11e (a3 and b1) of each base material 11 face outward, and the rear end surfaces 11f face inward with a gap 12 between them. Since the thickness of each tread plate (base material 11) is the same, the base material surfaces 11a and 11a are flush with each other.

Next, as shown in FIG. 3B, the long and wide decorative sheet 3 sent out from the reel is put on the base material surfaces 11a and 11a and attached to the entire surface including the non-slip grooves 11b and 11b. , As shown in FIG. 3C, the decorative sheet 3 is bent along the corners of the substrate surfaces 11a and 11a and the nose tip surfaces 11e and 11e and attached to the nose tip surfaces 11e and 11e. The tip surfaces 11e and 11e of the nose are bent along the corners of the back surfaces 11c and 11c of the base material, and the regions up to the riser plate fitting grooves 11d and 11d of the back surfaces 11c and 11c of the base material are attached. As is known, the decorative sheet 3 can be attached to these surfaces by applying an adhesive to the back surface and / or each surface of the decorative sheet 3 and then pressing the decorative sheet 3 with a roller or the like.

In this way, the decorative sheet 3 is attached so as to wrap around the base material surfaces 11a, 11a, the nose tip surfaces 11e, 11e, and a part of the base material back surfaces 11c, 11c, and then as shown in FIG. 3 (d). After cutting the decorative sheet 3 at a substantially intermediate point of the gap 12 between the rear end faces 11f and 11f of the base material and cutting the decorative sheet 3 between each pair of treads (the cutting position is indicated by a virtual line). , Two decorative sheet-attached treads A3 and B1 are manufactured as shown in FIG. 3 (e) by taking them down from the transport device 10. The scrap portion 3'of the decorative sheet that hangs down from the side surface other than the nose tip surfaces 11e and 11e of the base material surfaces 11a and 11a after cutting is used by a cutting device such as a laser before being removed from the transport device 10 or thereafter. Cut by hand.

Since FIG. 3 is a cross-sectional view taken along the line taken along the line AA of FIG. 2A, only the tread plate A3 and the tread plate B1 are shown, but for other tread plate pairs (tread plate A2 and tread plate B2, tread plate A1 and tread plate B3). It can be easily understood from the above description that is also manufactured in the same manner.

2 (b) to 2 (d) show other arrangement examples for manufacturing the decorative sheet-attached treads A1, A2, A3; B1, B2, B3 for two sets of three-step stairs at one time. In FIG. 2B, the tread plate B1 and the tread plate A1, the tread plate A2 and the tread plate B2, and the tread plate A3 and the tread plate B3 are paired, and their nose tip surfaces b1 and a1, a2 and b2, a3 and b3 are in the transport direction X. In FIG. 2C, the tread plate B1 and the tread plate A1, the tread plate A2 and the tread plate B3, and the tread plate B2 and the tread plate A3 are paired and their nose tip surfaces are arranged so as to face each other and extend in parallel. b1 and a1, a2 and b3, b2 and a3 are arranged so as to face each other on both sides of the transport direction X and extend in parallel. In FIG. 2D, tread plate B1 and tread plate A3, tread plate A2 and tread plate A1, and tread plate B3 and tread plate B2 are paired with each other, and their nose tip surfaces b1 and a3, a2 and a1, b3 and b2 are arranged so as to face both sides of the transport direction X and extend in parallel. These arrangement examples can also be manufactured in the same manner as described above with reference to FIG.

In this way, a total of 6 decorative sheet-attached treads A1, A2, A3; B1, B2, B3 required for two sets of three-step stairs are paired with each other, and their nose tip surfaces a1 to By arranging a3, b1 to b3 so as to face both sides of the transport direction X and extend in parallel, the decorative sheet pasting work is performed, so that a total of 6 decorative sheet pasting treads required for two sets can be obtained. Since it can be manufactured at the same time (in one line) without excess or deficiency, the yield is good, and the cut portion 3'(the portion indicated by the vertical line hatching) of the decorative sheet 3 is relatively small, so that the decorative sheet 3 is wasted. Can also be made smaller.

Although the present invention has been described in detail based on the illustrated embodiments, the present invention is not limited to this, and can be modified in various ways within the scope of the invention described in the claims. Is. In the illustrated embodiment, in the three-step staircase in which the range of 90 degrees is composed of three treads, the angle (rotation angle) of each tread on the pillar center side is set to 30 degrees, but the three treads. The angle is not particularly limited as long as the sum of the angles is 90 degrees. For example, if the angles of the lower tread, the middle tread, and the upper tread are different, the angles of the upper and lower treads are the same, but the angles of the middle treads are different, the angles of the lower treads and the middle treads are the same. However, even if the angle of the upper tread is different from this, or the angle of the upper tread and the middle tread is the same but the angle of the lower tread is different, the sum of the angles of the three treads is The present invention can be applied to such a three-step round staircase as long as the angle is 90 degrees. In these cases, if two sets of treads are arranged to form a pair of treads, the rear end faces of these treads may not be parallel to each other because the angles of the treads forming the pair of treads on the pillar center side are different. After cutting the decorative sheet 3 in the gap 12 between the rear end faces, the unnecessary portion 3'may be removed, which can be carried out in the same manner as in the above-described embodiment.

A1, A2, A3; B1, B2, B3 Three-step staircase treads a1, a2, a3; b1, b2, b3 Step nose tip surface of these treads 3 Decorative sheet 3'Cut part of decorative sheet 10 Conveyor device 11 Tread board substrate 11a Front surface 11b Anti-slip groove 11c Back surface 11d Rise plate fitting groove 11e Step nose tip surface 11f Rear end surface 12 Gap

Claims (2)

This is a method of simultaneously manufacturing two sets of decorative sheet-pasted treads with three pieces of a lower tread, a middle tread, and an upper tread that constitute a three-step staircase, and a tread base material meter for the two sets of treads. Two pairs of six treads are combined and three pairs of treads are arranged at intervals in the transport direction, and the tip surfaces of the nose of the tread base material of each tread pair are aligned on both sides in the transport direction and these tread base materials. One decorative sheet is wound from the front surface of these six tread plate base materials to the back surface via the tip surface of the stairs while arranging the rear end surfaces in a positional relationship facing each other with a gap and transporting them in the transport direction. The decorative sheet is cut between the pairs of treads in the transport direction and between the rear end faces of the tread base materials in each pair of treads, and further, unnecessary parts of the decorative sheet are cut. A method of manufacturing a sheet-attached tread board for stairs. Each tread plate pair is formed by combining different sets of tread plate base materials, and in these tread plate pairs, the nose tip surfaces of the three tread plate base materials constituting one set are aligned on one side in the transport direction. The sheet-attached tread plate for a round staircase according to claim 1, wherein the tip surfaces of the nose of the three tread plate base materials constituting the other set are all arranged so as to be aligned with the other side in the transport direction. Production method.