JPH0118321Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a lumber gripping device, and more specifically, it grips the sawn surface of lumber after it has been sawn when gripping the lumber on the lumber transport car of a sawmill. This invention relates to a lumber gripping device in which a special lumber clamp attachment that can grip lumber without causing damage is attached to an upper dog.

As shown in FIGS. 1 and 2, the wood material gripping device of the lumber transport vehicle in a sawmill generally includes guide grooves of a head block 1 installed at multiple locations on the lumber transport vehicle (not shown). A column 3 is vertically attached to the head stock 2 which is slidably engaged with the column 3, and brackets 4a and 4b which are moved up and down by a fluid cylinder are attached to this column so that the brackets can be moved left and right by the fluid cylinders 5a and 5b. The upper dog 6a and the lower dog 6b are slidably attached to the headstock 1, and the material wood a placed on the headstock 1 is gripped by the upper and lower dogs 6a and 6b while it is in contact with the abutment surface 2a of the headstock 2. It's summery. However, with a gripping device having such a configuration, in the case of a prismatic wood cutter, the sawn surface must be grasped with a dog after it has been sawn, which may cause scratches on the sawn surface and further damage. It is necessary to saw and split the wood for cutting, which not only wastes the material but also requires a lot of time and effort to saw the wood.Furthermore, warping and bending may occur due to the relationship between wood grains when sawing. It was not possible to correct this, and based on the intuition of an experienced person, when gripping, one end of the headstock was slightly separated from the contact surface of the headstock.

The purpose of this invention is to eliminate the above-mentioned drawbacks of the conventional method. are attached with the toes of these twin dogs facing each other, and a wood presser attachment is pivoted to each of these twin dogs through the first pivot hole, and a spring is attached to rotate this attachment, and a spring is attached to the attachment. A roller is provided near the tip of the toe to hold the wood and release the attachment, and when grasping the material, the attachment is moved away from the tip of the toe through the roller against the elasticity of the spring, and the material is held by the tip of the toe. Further, a wooden retainer is provided at the other corner of the attachment opposite to the first pivot hole, and the wooden retainer is provided to protrude beyond the tip of the toe in the opposite direction of the twin dogs, and By providing a second pivot hole in the upper corner of the attachment directly above the holding member, these attachments can be attached to each of the twin dogs in any one of the first and second pivot holes. The present invention provides a lumber gripping device characterized in that it is configured to be selectively pivotally supported by a hole.
An embodiment of this invention shown in the drawings will be described in detail below.

Figure 3 is a perspective view of the special wooden presser attachment of this invention.
As shown in FIGS. 3 to 8, twin dogs 8, which will be described later, are located at one corner of the two rectangular side plates 71a and 71a.
A, 8b are provided with a first pivot hole 72a and a second pivot hole 72b corresponding to each corner, and the both sides are separated from the dog spacing of the twin dogs at approximately the center of the both sides and at the other corner. Connecting support rods 73 integrated at slightly narrow intervals
and a wooden retainer 74 which also serves as a connection and holds down the sawn surface, and is attached to the lower front end of the side plate (Fig. 3) so that the outer periphery of the wooden retainer is located slightly above the grafted surface. (Upper dog side, Figure 6)
A roller 75 serving as a presser and an attachment release is pivotally supported between the side plates by a shaft 76.

As shown in FIGS. 4 to 6, both the upper dog 8a and the lower dog 8b have two dog claws 81.
a and 81b are arranged in parallel at an interval slightly wider than the width of the wood holding member 74, and the toe 89 is placed above the grafting surface of the wood holding member 74 at the top and below at the bottom, and Dotsugu 8
The holes 82a, 82b, 83a, 83b for attaching the attachments are provided in holes 82a, 82b, 83a, 83b respectively in a and 8b. A connecting support rod 86 that is in contact with the connecting support rod 86 and an adjustment member 87 that adjusts the position thereof are attached.

The lumber gripping device of this invention is constructed as described above, and the case where this lumber gripping device is used to grip and hold lumber will be explained below.

Fig. 5 shows the configuration of the lumber gripping device of a lumber transport car equipped with the gripping device of this invention, and the configuration of the parts with the same reference numerals as in Figs. It is. In each of the above figures, 7, 7 is a wood presser attachment, 8a is an upper twin dog, and 8b is a lower twin dog. The two-pronged helical spring 88 has both ends locked to the support rod 86, and the center turning point is locked to the pin 85A of the support shaft 85 fixed to the dog claws 81a, 81b as shown in FIG. There is.

FIG. 6a shows the upper twin dog 8a with the wood presser attachment 7 inserted through the support shaft 85 through the first pivot hole 72a and the holes 82a, 82a, and the dog claws 81a, 81.
a, and a spring 88 attached to the support shaft 85 applies a clockwise rotational force to the wood presser attachment 7.

In the case of raw material wood, it is gripped between the upper and lower twin dogs 8a and 8b, but in this case, even when the wood presser attachment 7 passes the support shaft 85 through the first pivot hole 72a, it cannot be held in place as shown in FIG. 6b. Even when the support shaft 85 is passed through the pivot hole 72b of No. 2, the gripping point of the material wood a is arc-shaped, so the attachment 7 resists the elasticity of the spring 88 via the roller 75 and rotates counterclockwise.
It is held between the toe 89, the presser roller 75 of the attachment 7, the toe (not shown) of the attachment 7 of the lower dog 8b, and the abutment surface 2a.

The first sawing of the gripped material wood a is shown in Figure 7a,
After carrying out the process at the position shown by the chain line in b, depending on the drying condition of the material wood a, the grain of the wood, etc., as shown in Figure 7 a to d, ideally it should be straight as shown in the dashed line in figure c. However, for the reasons mentioned above, as shown by the solid line in FIG.

If there is a warp in this way, as shown in FIG. Attach and attach the sawn surface to the head stock 2 and the wood presser attachment 7.
When gripping the wood with a slight gap d equal to the amount of warpage between the sawn surface and the abutting surface 2a, the wood presser attachments 7, 7 will be attached to the sawn surface of the lumber a. Wooden retainer 7 located slightly to the right of the bottom of 85
4, the wood presser attachment 7 tries to rotate counterclockwise against the elastic force of the spring 88, and as a result, as shown in FIGS. 8a and 8b and FIG. A force in the horizontal direction is generated that presses the material against the abutment surface 2a, which corrects the warp on the ungrinded side and allows the milling to be carried out at the position shown by the dashed-dotted line in Fig. 7c. As shown in FIG. 7d, prisms with the same cross-sectional area can be bent laterally. In this case, upper twin dogs 8a and 8b are provided on the grinding surface due to the above-described configuration.
Since the toe 89 does not hit, there is no damage.

FIG. 10 shows the upper and lower twin dogs 8a, 8 by passing the support shaft 85 through the second pivot hole 72b and the holes 83a, 83a.
This figure shows the case where the wood presser attachment 7 is attached to the lower dog 8b, but the lower dog 8b side is omitted. In this case, since the support point is directly above the wood retainer 74, the horizontal component force described above does not occur, so the wood retainer attachment 7 does not rotate, and the wood retainer 74 and the lower wooden retainer Even if the already sawn sawn surface of the wood a is held between the wood (not shown) and the sawn surface of the wood a, the gap d remains in a part of the abutment surface 2a, and the sawn surface is cut from the position indicated by the dashed-dotted line. In this case, the cross-sectional area is reduced in proportion to the amount of warpage in the larger part. Also in this case, the toe of the dotsugu does not hit the ground surface, so there is no damage.

As mentioned above, this invention is based on the headstock 2, which is slidably disposed along the guide groove of the headblock 1 of the material transport vehicle, at the top and bottom of the column 3, which is erected.
The twin dogs 8a and 8b are replaced by these twin dogs 8a,
8b are attached so that the toes 89 are opposed to each other, and a spring 88 is attached to each of these twin dogs to pivotally support the wood presser attachment 7 in the first pivot hole 72a and to rotate this attachment.
Further, the attachment 7 is provided with a roller 75 for holding the wood and releasing the attachment near the toe 89. When grasping the material, the attachment 7 is moved from the toe 89 through the roller 75 against the elasticity of the spring 88. A mechanism is used to hold the material wood with the toes 89 at a distance, and a wood retainer 74 is provided at the other corner of the attachment 7 facing the first pivot hole 72a, and the wood retainer 74 is held between the twin dogs. 8a, 8b in opposing directions, protruding beyond the toe 89, and the wood retainer 7
At the top corner of attachment 7 directly above
By providing the pivot holes 72b, these attachments 7 can be attached to the first and second pivot holes 72a, 7 in each of the twin dogs 8a, 8b.
Since it is configured so that it can be selectively pivoted using any pivot hole in 2b, the lumber can be pressed against the headblock, forcefully pressed against the abutting surface of the headstock to correct any warping or bending, and grip the sawn surface without damaging it. In addition, depending on the mounting position of the wood presser attachments on the twin dogs, the lumber can be gripped between each attachment and pressed strongly against the mating surface to create a rectangular column with the same cross section across all parts even if it is warped. It has the advantage of being able to be cut into pieces, and also being able to be held in such a way that the cross-sectional area changes depending on the amount of warpage.

[Brief explanation of drawings]

Figures 1 and 2 are both side views showing the lumber gripping state of a conventional lumber gripping device, and Figures 3 to 10 each show an embodiment of this invention. is a perspective view of the wood presser attachment, Fig. 4 is a plan view of the attachment attached to the upper twin dog, and Fig. 5 is a diagram showing the configuration of the twin dog with the wood presser attachment attached and other parts of the material transport vehicle. Figures 6a and 6b are side views showing the relationship, and Figures 6a and 6b are partially cutaway cross-sectional views showing the relationship between the attachment position of the wood presser attachment to the upper twin dogs and the lumber, and Figures 7a to d are cross-sectional views of the wood. Figures 8a to 8c are diagrams explaining the relationship between the wood presser attachment and the lumber when sawing along the curve so as to follow the warp, Figure 9 is a perspective view showing the relationship between the wood presser attachment and lumber, etc. after the final sawing is performed in the gripping state shown in Fig. 8b, and Fig. 10 is a perspective view showing the relationship between the wood presser attachment and the lumber, etc. when sawing and splitting without following the warp. FIG. 3 is a diagram illustrating the relationship between a wood presser attachment and lumber, etc. 1...Headblock, 2...Headstock, 3...Column, 4a, 4b...Bracket,
5a, 5b...fluid cylinder, 7...wood presser attachment, 71a, 71b...side plate, 72a...
...First pivot hole, 72b...Second pivot hole, 73
... Connecting material, 74... Wood holding material, 75... Wood holding roller, 8a, 8b... Twin dogs.

Claims (1)

[Scope of utility model registration request] Twin dogs 8a and 8b are placed at the upper and lower parts of the column 3 which is set up on the headstock 2 which is slidably disposed along the guide groove of the headblock 1 of the material transport vehicle. The wood holding attachment 7 is pivotally supported in the first pivot hole 72a, and a spring 88 for rotating this attachment is attached to each of these twin dogs. A roller 75 is provided which serves as a presser and an attachment release, and when grasping the material, the attachment 7 is moved away from the toe 89 via the roller 75 against the elasticity of the spring 88, and the material is gripped by the toe 89. A mechanism that holds
Furthermore, the first pivot hole 72 of the attachment 7
A wooden retainer 74 is provided at the other corner opposite to a, and the wooden retainer 74 is provided so as to protrude beyond the toes 89 in the opposite direction of the twin dogs 8a and 8b, and the wooden retainer 74 is provided directly above the wooden retainer 74. By providing a second pivot hole 72b at the upper corner of the attachment 7, the attachment 7 can be attached to each of the twin dogs 8a, 8b using any one of the first and second pivot holes 72a, 72b. A lumber gripping device characterized in that it is configured to be selectively pivotable using a pivot hole.