JP4693536B2 - Spacers sandwiched between stacked lumber - Google Patents

Description

  The present invention relates to a spacer sandwiched between lumbers when the lumbers are stacked and dried. More specifically, the present invention relates to a material that can prevent bending of lumber during drying. Further, the present invention relates to a material that can prevent discoloration of a portion in contact with a lumber spacer.

  For example, timber to be used as building materials (referred to as “sawmill” in this specification) is sufficient to prevent the occurrence of mold, corrosion and corrosion caused by drying and shrinkage of materials after construction. Used in a dry state. Usually, this drying is performed in a state where a plurality of stages are stacked with a wooden square spacer interposed between the lumbers and the ventilation is improved in a drying room or outdoors.

  Since lumber contracts when dried, some lumber may bend when it is simply stacked. Therefore, the lumber is usually dried in a state where measures are taken so as not to bend as much as possible by applying a downward load from the upper side in a stacked state (see, for example, Patent Document 1).

JP-A-9-264668

However, the above lumber drying method has the following problems.
That is, as described above, the lumber is normally dried in a state where a downward load is applied from the upper side of the stacked portion, and thus bending in the vertical direction can be prevented to some extent. However, with respect to the horizontal direction, the above-described downward load alone cannot be suppressed, and it has been difficult to prevent bending.

  Therefore, the lumber is cut out in advance so as to have a cutting allowance around so that the surface can be finished straight by scraping the surface after completion of drying. This cutting allowance is formed to be relatively large so that even when the lumber is bent by a relatively large amount, a product having a production target size can be obtained and the lumber itself does not become a defective product. Therefore, in the production of conventional lumber, there is a problem that many parts are wasted and the yield is poor.

The present inventor can reduce the cutting allowance if the bending in the horizontal direction in the stacked state can be prevented to some extent when drying the lumber, thereby reducing the wasted portion and thus the yield. I got the idea that it might improve.
The present invention has been completed by conducting various experiments based on the above idea.

An object of the present invention is to prevent horizontal bending of lumber when the lumber is stacked and dried.
Another object of the present invention is to make it possible to prevent discoloration of a portion in contact with a lumber spacer.

Means taken by the present invention to achieve the above object are as follows.
In the first invention,
When stacking and drying lumber, the spacer is sandwiched between lumbers and restrains the movement of the lumber to prevent horizontal bending,
It has a square cylinder shape with the required length that is rigid,
On the two opposing surfaces in contact with the lumber, convex portions and concave portions are alternately formed over the entire length in the longitudinal direction ,
On the surface of the convex part, a protruding line or a ridge that prevents bending by restraining the movement of the lumber by sticking, biting or sinking into the lumber by applying a pressing force from above by weighting the lumber in a stacked state A point-like bending prevention means is provided,
There are spacers that are sandwiched between stacked lumbers.

In the second invention,
The spacer is made of aluminum, and is a spacer sandwiched between stacked lumbers according to the first invention.

(Work)
The operation of the spacer according to the present invention will be described.
The spacer according to the present invention is sandwiched between lumber and lumber when the lumber is stacked and dried. On the surface of the spacer in contact with the lumber, there is provided a bending prevention means for restraining or substantially restraining the movement of the lumber and preventing the bending, and the movement of the lumber is restricted or substantially restricted by the bending prevention means. .

  The spacer according to the present invention is sandwiched between lumber and lumber when the lumber is stacked and dried. The surface of the spacer that comes into contact with the lumber is provided with anti-bending means for restraining or substantially restricting the movement of the lumber to prevent the bending. , Restrain or substantially restrain the movement of the sawmill.

  What is configured so that the thermal conductivity or heat dissipation of the part in contact with the lumber is in a good state, for example, because the spacer itself has substantially the same temperature as the outside air, thereby, than the conventionally used spacer, The portion of the lumber that is in contact with the spacer is easily dried.

  Also, in the case where convex portions and concave portions are formed on the surface in contact with the lumber, when the lumber is stacked, the convex portions are in contact with the lumber, and a concave portion is formed between them, so than the above spacer Furthermore, the portion of the lumber that is in contact with the spacer is easily dried.

The present invention has the above-described configuration and has the following effects.
According to the spacer according to the present invention, the bending prevention means restrains the movement of the lumber by being stuck, biting in, or sinking into the lumber by applying a pressing force from above with the weight while the lumber is stacked . Thereby, the horizontal bending of the lumber during drying can be prevented.

  For example, the spacer that is in contact with the lumber has a good thermal conductivity or heat dissipation. For example, the spacer itself can have substantially the same temperature as the outside air. In addition, the portion in contact with the spacer of the lumber can be easily dried. Therefore, it is possible to prevent discoloration of the portion in contact with the lumber spacer as compared with the case where a conventional spacer is used.

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Embodiments of the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a perspective explanatory view showing a first reference example of a spacer according to the present invention,
FIG. 2 is an enlarged perspective explanatory view showing an end portion of the spacer shown in FIG.
Reference numeral S <b> 1 indicates a spacer that is sandwiched between lumbers when the lumbers are stacked and dried.

  The spacer S1 has a rectangular cylinder shape with a required length having rigidity. Reference numeral 10 indicates a hollow portion. On two opposing surfaces of the upper surface and the lower surface of the spacer S1, there is fixed a ridge plate 2 on which ridges 20 serving as bending preventing means are formed so as to repeatedly have a required pattern on the surface. The ridge plate 2 is provided over the entire length of the spacer S1 using a rivet 11 (fixing means). In this reference example, the spacer S1 was made of aluminum.

(Work)
FIG. 3 is an explanatory view showing a use state of the spacer S1 shown in FIG.
The operation of the spacer S1 shown in the present embodiment will be described with reference to FIGS.
The spacer S1 is used by being sandwiched between lumber and lumber when the lumber is stacked and dried. In the present embodiment, an example will be described in which the lumber K1 cut out to have a prismatic shape having a required length is dried.

  A plurality of lumbers K1 are installed side by side on the base member 4 placed on the ground at a required interval so as to be in a state substantially orthogonal thereto. The spacer S1 is provided on the upper surface of the lumber K1 at a position corresponding to the base member 4 in the vertical direction so as to be substantially orthogonal to the lumber K1. At this time, the spacer S1 is provided so that the ridge plate 2 is disposed on the upper side and the lower side. Another lumber K1 is stacked on the lumber K1 on which the spacer S1 is installed on the upper surface. Further, on the upper surface of the lumber K1, another spacer S1 is stacked at a position corresponding to the base member 4 in the vertical direction as in the above case. The lumber K1 and the spacer S1 are stacked in a plurality of stages by repeating this state.

A weight 5 (indicated by an imaginary line in FIG. 3) for applying a pressing force from above is provided at a position corresponding to the base member 4 in the vertical direction on the upper surface of the lumber K1 installed at the uppermost stage. .
Since the pressing force is applied downward by the weight of the weight 5, bending in the vertical direction during drying can be prevented.

  Furthermore, when the pressing force is applied by the weight 5, the ridges 20 formed on the ridge plate 2 are put into the lumber K <b> 1, bite in, or indented. Since the spacer S1 has rigidity, the lumber K1 is in a state in which the movement is substantially restricted. That is, according to the spacer S1, bending in the horizontal direction can be prevented.

  In addition, the spacer S1 is provided with the ridge plate 2 on the surface in contact with the lumber K1, and the usage is almost the same as the conventional spacer except that the ridge 20 is formed on the upper side and the lower side. There is no need for skill in use, so even if it is replaced, it can be used immediately.

Since the spacer S1 has a rectangular shape made of aluminum with good thermal conductivity or heat dissipation, the spacer S1 itself can have substantially the same temperature as the outside air. The portion of the lumber K1 that is in contact with the spacer S1 is easier to dry.
Accordingly, discoloration of the portion of the lumber K1 in contact with the spacer S1 can be prevented as compared with the case where a conventional spacer is used.

  In the case where the spacer S1 is used, the ridges 20 are stuck, digged into or indented into the lumber K1, and therefore the spacer S1 cannot be easily detached from the lumber K1. Thereby, for example, even when transported by a forklift or the like, the lumber K1 is unlikely to be displaced, and the number of times of reloading can be reduced.

In addition, the uneven | corrugated | grooved part 3 as shown in FIG. 4 can also be provided over the full length, for example in two surfaces which are not providing the convex strip plate 2 of spacer S1.
FIG. 4 is an enlarged perspective explanatory view showing a second reference example of the spacer according to the present invention.
The concavo-convex portion 3 of the spacer S2 is formed such that convex portions 30 having a required height are provided at intervals in the length direction, and a concave portion 31 is relatively provided therebetween.

FIG. 5 is an explanatory view showing a use state of the spacer S2 shown in FIG.
In FIG. 5, the same or equivalent parts as those shown in FIGS. 1 to 4 are given the same reference numerals. Further, in the following description, the description overlapping with the above-described part of the structure is omitted except for necessary matters.

  The spacer S2 is used when stacking plate-like lumber K2 that does not bend so much during drying. In the case of such a lumber K2, it is not necessary to pierce, bite in or ridge the ridges 20, so that the convex portions 30 constituting the concavo-convex portions 3 are in contact with the lumber K2, that is, The portions 30 can be provided and stacked so as to be arranged on the upper side and the lower side.

  In the case where the lumber K2 is stacked in this way using the spacer S2, the convex portion 30 is in contact with the lumber K2, and the concave portion 31 is formed therebetween, so that the spacer S2 of the lumber K2 further than the spacer S1. The contacted portion can be easily dried, and discoloration can be prevented.

FIG. 6 is an enlarged perspective explanatory view showing a first embodiment of a spacer according to the present invention.
In FIG. 6, the same or equivalent parts as those shown in FIGS. 1 to 5 are given the same reference numerals. Further, in the following description, the description overlapping with the above-described part of the structure is omitted except for necessary matters.

  The spacer S3 has a square cylinder shape with a required length having rigidity. Concavity and convexity portions 3a are formed over the entire length on the two opposing surfaces which are the surfaces in contact with the lumber of the spacer S3. The concavo-convex portion 3a is formed such that convex portions 30a having a required height are provided at intervals in the length direction, and the concave portions 31a are relatively provided therebetween. On the surface of the convex portion 30a that constitutes the concave and convex portion 3a, a convex strip 300 that is a means for preventing bending is formed.

(Work)
With reference to FIG. 6, the operation of the spacer S3 shown in the first embodiment will be described.
In addition, description is abbreviate | omitted about the same effect | action and effect which arise with the structure common to the above-mentioned spacer S1 and spacer S2, and only a different point is demonstrated.

  According to the spacer S3, the ridge 300 formed on the surface of the convex portion 30a is stuck in, cut into, or sunk into the lumber by applying a pressing force from above by weighting in a state where the lumber is stacked. Become. Moreover, since the recessed part 31a is formed between the convex parts 30a which are contacting with lumber at this time, the part which contacted spacer S3 of lumber is also in the state which is easy to dry. That is, according to the spacer S3, it is possible to prevent discoloration of a portion in contact with the spacer S3 of the lumber while preventing bending in the horizontal direction.

  In the reference example and the embodiment, the spacers S1, S2, and S3 have a rectangular tube shape, but the shape of the spacer is not limited to this, and for example, a polygonal cylinder shape or a polygonal column shape (medium It is also possible to use one having a real square pillar or the like.

  The spacers S1, S2, and S3 are made of aluminum, but are not limited thereto. For example, other metals such as stainless steel and iron, and materials such as ceramics can be used.

  The ridges 20 shown in the above reference example are formed by fixing the ridge plate 2, but this is not limited as well, and the ridges 20 can be provided by cutting out the surface of the spacer, for example.

  In the reference example and the embodiment described above, the protrusion is exemplified as the bending prevention means, but this is not particularly limited. For example, it may be a point-like one that pierces the lumber, bites it, or bites it into to restrain or substantially restrain the movement of the lumber and prevent bending.

  The terms and expressions used in this specification are merely explanatory and are not limiting at all, and exclude terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to do. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

The perspective explanatory view showing the 1st reference example of the spacer concerning the present invention. Expansive perspective explanatory drawing which shows the edge part of the spacer shown in FIG. Explanatory drawing which shows the use condition of the spacer shown in FIG. Expansive perspective explanatory drawing which shows the 2nd reference example of the spacer which concerns on this invention. Explanatory drawing which shows the use condition of the spacer shown in FIG. Explanatory perspective explanatory drawing which shows 1st Embodiment of the spacer which concerns on this invention.

S1, S2, S3 Spacers K1, K2 Lumber 10 Hollow part 11 Rivet 2 Convex strip 20 Convex part 3 Concave part 30 Convex part 300 Convex part 31 Concave part 4 Base member 5 Weight

Claims (2)

When stacking and drying lumber, the spacer is sandwiched between lumbers and restrains the movement of the lumber to prevent horizontal bending,
It has a square cylinder shape with the required length that is rigid,
Convex parts (30a) and concave parts (31a) are alternately formed over the entire length in the longitudinal direction on the two opposing surfaces in contact with the lumber,
On the surface of the convex part (30a), a pressing force is applied from above by weighting the lumber in a stacked state, so that the lumber is stuck, digged in, or cut into the lumber and restrains the lumber movement to prevent bending. It is characterized in that a convex or striated bending prevention means is provided,
Spacers sandwiched between stacked lumbers. The spacer is sandwiched between stacked lumbers according to claim 1, wherein the spacer is made of aluminum .

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