JP6734827B2 - Mounting structure for backpack band - Google Patents

Description

The present invention relates to a backpack-type working machine such as a power sprayer, and more particularly to a mounting structure for mounting a backpack-type working machine on a backpack-type working machine.

Conventionally, there are a pair of left and right backpack bands for carrying a backpack work machine on the back, and the upper end and the lower end of each backpack band are attached to the upper part and the lower part of the work machine, respectively. In particular, Patent Document 1 below describes a structure in which the upper end of the backpack band is attached to the upper part of the tank.

In this backpack band mounting structure, a pair of vertically extending recesses are formed in the upper part of the backpack surface side of the liquid tank, and a bar is horizontally installed between the left and right wall surfaces of each recess to form a strip of the backpack band. The cylindrical portion formed by folding back the upper end of the is inserted into the gap between the bar and the bottom surface of the concave portion, and the pin is inserted into the cylindrical portion to prevent the backpack band from coming off from the concave portion. ..

JP, 2007-38066, A

However, in the above-mentioned structure for attaching the backpack band, there is a possibility that the pin inserted into the tubular portion as a retaining member may come out of the tubular portion and fall out.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a mounting structure for a backpack band that prevents a pin from falling out of the tubular portion of the backpack band.

A backpack band mounting structure according to the present invention is a mounting structure for mounting a belt-shaped end (44) of a backpack band (16) to a backpack work machine (10), the front and top surfaces of the backpack work machine (10). A pair of left and right recesses (28) is formed in the recess, a bar (30) is installed between the left and right wall surfaces (28a, 28b) of the recess (28), and the end (44) of the backpack band (10) is folded back. The tubular portion (46) formed by inserting the pin (1) into the tubular portion (46) is inserted into the gap (32) between the bar (30) and the bottom surface (28c) of the recess (28). In the mounting structure of the backpack band in which the end portion (44) of the backpack band (16) is connected to the backpack type working machine (10) in order to prevent the tubular portion (46) from coming off from the recess (28), (1) is an axial movement of the pin (1) inserted into the tubular portion (46) in the axial direction, projecting radially outward at both ends thereof, facing the tubular portion (46). It is characterized in that it has claws (2) for restricting each.

According to such a backpack band mounting structure, the movement of the pin (1) in the axial direction with respect to the tubular portion (46) is restricted by the claws (2) at both ends of the pin (1). It is possible to prevent the pin (1) from falling off from (46).

Here, if the claw (2) has elasticity and is configured to deform so as to be able to enter the tubular portion (46) when being inserted into the tubular portion (46 ), the deformed one side claw (2) is The pin (1) including the claw (2) easily passes through the tubular portion (46) because it easily passes through the tubular portion (46) and then returns to the original shape by elasticity after passing through the tubular portion (46). It can be assembled and the assemblability can be improved.

Further, when the claw (2) is configured to be pressed and fixed to both wall surfaces (28a, 28b) of the recess (28) by its elastic force, the pin (1) is fixed to the recess (46) by the claw (2). Can be securely fixed. As a result, it is possible to reliably prevent the pin (1) from falling off the tubular portion (46).

As described above, according to the present invention, it is possible to provide a backpack band mounting structure capable of preventing the pins from falling out of the tubular portion of the backpack band.

It is the perspective view which looked at the backpack type working machine to which the mounting structure of the backpack band concerning the embodiment of the present invention was applied from the front. It is the perspective view which looked at the upper band attachment part which constitutes the attachment structure of the backpack band concerning the embodiment of the present invention from the front. It is a front view which shows the pin which comprises the attachment structure of the backpack band which concerns on embodiment of this invention. It is a side view which shows the folding|returning edge part of the backpack band which comprises the mounting structure of the backpack band which concerns on embodiment of this invention. FIG. 5 is a front view of FIG. 4. It is a front view which shows the attachment structure of the backpack band which concerns on embodiment of this invention. It is explanatory drawing which shows the attachment procedure of the backpack band in the attachment structure of the backpack band which concerns on embodiment of this invention.

Hereinafter, preferred embodiments of a backpack band mounting structure according to the present invention will be described with reference to the accompanying drawings. In the following description, the terms representing directions such as up and down, front and rear, and left and right refer to the direction with the worker carrying the backpack-type working machine as a reference, and the front is defined as “front” for the worker.

FIG. 1 is a perspective view of a backpack type working machine to which a backpack band mounting structure according to an embodiment of the present invention is applied, as viewed from the front, and FIG. 2 is a perspective view of an upper band mounting portion as viewed from the front, Is a front view showing a pin, FIG. 4 is a side view showing a folded back end of a backpack band, FIG. 5 is a front view of FIG. 4, FIG. 6 is a front view showing a backpack band mounting structure, and FIG. FIG. 6 is an explanatory view showing a procedure for attaching the backpack band, (a) showing the tubular portion through a gap between the bar and the bottom surface of the concave portion from top to bottom, and (b) inserting a pin into the tubular portion. Drawing (c) is a figure which attached the upper end of the backpack band to the upper band attachment part. Hereinafter, in the present embodiment, the backpack-type working machine will be described as a backpack-type power sprayer for spraying a liquid drug (chemical solution).

As shown in FIG. 1, a power sprayer 10 includes a backpack frame 12 on which a liquid pump, an engine, etc. are mounted, a liquid tank 14 arranged above the backpack frame 12, which stores a drug to be sprayed, and the power sprayer. A pair of left and right backpack bands 16 (only one of which is shown in FIG. 1) for the operator to carry the machine 10 on his/her back are provided. At the time of work, the worker carries the power sprayer 10 using the backpack band 16 and manually operates the nozzle 17 to spray the drug at a desired position. Lower band attachment portions 18 to which lower ends of the backpack bands 16 are attached are provided on the left and right sides of the lower portion of the backpack frame 12, respectively.

Further, in a state where the power sprayer 10 is carried on the back of the worker, an upper band for attaching the upper end portion of the backpack band 16 to the right side and the left side, respectively, is attached to the upper part of the surface facing the worker. A section 24 is provided. A back support member 26 made of a cushion material is provided on the operator-side surfaces of the backpack frame 12 and the liquid tank 14.

As shown in FIGS. 1 and 2, the upper band mounting portion 24 includes a recess 28 formed on the front surface of the liquid tank 14 and having a substantially rectangular shape in a front view. As shown in FIG. 6, the width h between the wall surfaces 28 a and 28 b of the recess 28 is set to be larger than the width of the strip-shaped body 44 so that the strip-shaped body 44 at the upper end of the backpack band 16 can enter. .. A single bar 30 is provided between the left and right wall surfaces 28a and 28b (see FIGS. 2 and 6) of the recess 28. As shown in FIG. 7, between the bar 30 and the bottom surface (the surface that becomes the rear side) 28c of the recess 28, the thickness is slightly larger than the thickness of the strip-shaped body 44 that is the upper end portion of the backpack band 16 folded back in two. A width gap 32 is formed. The gap 32 is a space through which a cylinder portion 46, which will be described later, passes in a crushed state. Further, protrusions 34 are formed on the left and right corners of the lower surface 28d of the recess 28 (see FIGS. 2 and 7).

As shown in FIG. 1, the backpack band 16 includes a wide and elastic band body portion 36 that is worn around the shoulder of the worker.

At the upper end of the band main body 36, that is, the end on the side where it is attached to the upper band attaching portion 24, one end of the narrow and thin band-shaped body 44 is sewn on. As shown in FIG. 4, the other end portion (tip portion) of the band-shaped body 44 is extended and then folded back and sewn at the stitching portion 59, whereby a gap is formed on the front side of the stitching portion 59, The tubular portion 46 as shown in FIG. 7 can be formed.

Further, the upper end of the band-shaped body 44 on the side of the band main body 36 extends upward outside the range shown in FIG. 7 and is largely folded back at the same time, and both edges (both sides) thereof are sewn to open the front end side. A bag portion 48 (opening obliquely downward in FIG. 7) is formed. It is more preferable that the folded portion of the bag portion 48 extends more than half of the entire length of the strip-shaped body 44 and that the tip end side thereof extends to a position near the tubular portion 46. Then, the band-shaped elastic member 54 is accommodated in the bag portion 48.

As shown in FIG. 7A, with respect to the tubular portion 46, the tubular portion 46, which has passed through the gap 32 between the bar 30 and the bottom surface 28 c of the recess 28 from the upper side to the lower side, passes through the gap 32 in the original direction. A retaining member is provided to prevent slipping out. The retaining member includes a pin 1 and a claw 2 as shown in FIG.

The pin 1 has a round bar shape and is inserted into the tubular portion 46 shown in FIG. 7, and is approximately the same as or slightly longer than the length of the belt-like body 44 (the tubular portion 46). The claws 2 are provided at both ends of the pin 1, and are configured to project outward in the radial direction and face the ends of the tubular portion 46 (see FIG. 6 ). The pin 1 including the claw 2 is integrally formed of resin or the like. The claw 2 is here configured in a hook shape. Specifically, the claw 2 includes a base 2a that projects in a short axial direction outward from the end of the pin 1, an extension 2b that extends radially outward from the end of the base 2a, and an extension 2b. It has a shape having a tip portion 2c that bends inward in the axial direction, and the entire claw 2 has elasticity. The base portion 2a, the extending portion 2b, and the tip portion 2c define a recessed portion 2x that is recessed in the axial direction.

In this state, the length d between the tip portions 2c, 2c of the claws 2, 2 is set to be substantially the same as the width g (see FIG. 5) of the strip 44.

Further, the length e of the pin 1 including the claw 2 is set to be larger than the width h between both wall surfaces 28a and 28b of the recess 28 within the limit of the length of the claw 2 which can be flexed in the axial direction (specifically, in detail). See below).

As shown in FIGS. 4 and 5, the height c of the pin 1 including the claw 2 is substantially the same as the length f from the sewn portion 59 to which the end portion of the strip 44 is folded and sewn to the folded portion. Is set to Thereby, the pin 1 can be suitably inserted into the tubular portion 46, and the claw 2 can be arranged at a position facing the tubular portion 46 and capable of restricting the axial movement of the pin 1 as desired.

Reference numeral 58 shown in FIG. 2 is a nozzle holder, and it is possible to hold the nozzle 17 shown in FIG. 1 in the concave portion of the upper surface of the nozzle holder 58.

Next, a case where the strip-shaped body 44 which is the upper end portion of the backpack band 16 having such a configuration is attached to the upper band attachment portion 24 will be described with reference to FIG. 7. FIG. 7 is an explanatory view showing the procedure for attaching the backpack band, FIG. 7(a) is a view in which the tubular portion is passed through the gap between the bar and the bottom surface of the recess from top to bottom, and FIG. 7(b) is FIG. 7C is a diagram in which the pin is inserted into the tubular portion, and FIG. 7C is a diagram in which the upper end portion of the backpack band is attached to the upper band attachment portion.

First, as shown in FIG. 7A, the tubular portion 46 of the belt-like body 44 is inserted into the recess 28 from the upper side of the bar 30, and is inserted into the gap 32 between the bar 30 and the bottom surface 28 c of the recess 28. At this time, the tip of the elastic member 54 is in contact with the bottom surface 28c of the recess 28.

Since the tubular portion 46 of the strip-shaped body 44 is separable from the elastic member 54, the tubular portion 46 can be pulled forward from the lower side of the bar 30 as shown in FIG. Insert the round rod-shaped pin 1 into.

Here, the claw 2 protruding from the pin 1 has elasticity. Therefore, the claw 2 shown in FIG. 3 can be elastically deformed such that it is bent so as to be largely tilted forward, or is expanded so as to be spread outward in the axial direction. 2 can be deformed to enter the tubular portion 46. More specifically, one side (for example, the left side of FIG. 3) claw 2 is deformed together with the pin 1 to enter the tubular portion 46, and the tubular portion 46 surrounds the pin 1 and the one side claw 2. Push in pin 1. Then, the claw 2 on the one side pops out from the tubular portion 46 and returns to its original shape by elasticity. Then, the tubular portion 46 is slightly moved in the axial direction so as to cover the pin 1 and positioned. At this time, the tip portion 2c of the claw 2 and the end portion of the tubular portion 46 may be in contact with each other or a gap may be left. Then, as described above, the length d (see FIG. 3) between the tip portions 2c, 2c of the claws 2, 2 is substantially the same as the width g (see FIG. 5) of the belt-like body 44, so that the backpack band 16 (strip 44) can be arranged at a predetermined fixed position.

Then, even in this state, that is, as shown in FIG. 7B, even when the pin 1 is inserted into the tubular portion 46 and the tubular portion 46 is not housed in the recess 28, the both ends of the pin 1 are Since the claw 2 restricts the movement of the pin 1 in the axial direction with respect to the tubular portion 46, the pin 1 is prevented from falling off the tubular portion 46.

Then, after the pin 1 is attached to the tubular portion 46, when the middle portion of the backpack band 16 is pulled, the tubular portion 46 into which the pin 1 is inserted is housed in the recess 28 as shown in FIG. When pulled upward, the tubular portion 46 and the pin 1 are locked to the bar 30, and the backpack band 16 is connected to the upper band attachment portion 24.

As shown in FIG. 6, in the state where the pin 1 having the claw 2 is accommodated in the recess 28, as described above, the length e (see FIG. 3) of the pin 1 including the claw 2 is equal to that of the recess 28. Since the width h between the wall surfaces 28a and 28b (see FIG. 6) is set to a maximum length that allows the claw 2 to bend in the axial direction, the claws 2 and 2 are pressed against the wall surfaces 28a and 28b, respectively. The pin 1 is in a state of being sandwiched between both wall surfaces 28a and 28b of the recess 28. In FIG. 6, the protrusions 34, 34 are omitted in order to make it easier to see that the claws 2, 2 are sandwiched between the wall surfaces 28a, 28b.

Incidentally, in the state shown in FIG. 7C, the elastic member 54 tends to extend obliquely upward due to its elastic restoring property, so that the bag portion 48 into which the elastic member 54 is inserted is lifted upward, resulting in a strip shape. The body 44 has an arched shape, and as shown in FIGS. 1 and 7(c), the body 44 is always wide between the backpack band 16 and the surfaces of the liquid tank 14 and the back support member 26 that contact the back of the operator. A gap is formed so that the operator can easily insert his/her arm into this gap.

According to the backpack band attachment structure of the present embodiment having such a configuration, the pin 1 inserted into the tubular portion 46 projects radially outward at both ends thereof, faces the tubular portion 46, and Since each of the claws 2 restricts the axial movement of the pin 1 inserted into the portion 46 with respect to the tubular portion 46, the axial movement of the pin 1 with respect to the tubular portion 46 is regulated by the pawls 2, It is possible to prevent the pin 1 from falling off the portion 46.

Further, since the claw 2 has elasticity and is deformable so as to be able to enter the tubular portion 46 when being inserted into the tubular portion 46, the deformed one side claw 2 easily passes through the tubular portion 46 and the tubular portion 46. After passing through, it can return to its original shape by elasticity. Therefore, the pin 1 including the claw 2 can be easily assembled to the tubular portion 46, and the assemblability can be improved.

Further, since the claw 2 is pressed and fixed to both wall surfaces 28a and 28b of the recess 28 by its elastic force, the pin 1 can be reliably fixed to the recess 28 by the claw 2. As a result, it is possible to reliably prevent the pin 1 from falling off the tubular portion 46.

Further, the protrusions 34, 34 (see FIGS. 2 and 7) on both ends of the lower front surface of the recess 20 further prevent the tubular portion 46 into which the pin 1 is inserted from falling off the recess 28.

Although the present invention has been specifically described based on the embodiment, the present invention is not limited to the above embodiment. For example, in the above embodiment, the nail 2 is hook-shaped, which is particularly preferable. However, it is not limited to the hook shape, and the point is that the axial line of the pin 1 inserted into the tubular portion 46 with respect to the tubular portion 46 protruding radially outward from both ends of the pin 1 and facing the tubular portion 46. Any nail may be used as long as it restricts movement in the direction.

Further, in the above-described embodiment, the application to the backpack-type power sprayer for spraying the drug (medicine solution) is described, but it is also applicable to, for example, the backpack-type power sprayer and the backpack-type power blower. In addition, the present invention can be applied to a manual backpack-type working machine, and in short, can be applied to a backpack-type working machine including a backpack band.

Further, it is of course applicable to the mounting structure of the backpack band described in JP-A-2005-222839 which does not have the elastic member 54.

DESCRIPTION OF SYMBOLS 1... Pin, 2... Claw, 10... Backpack type power sprayer (backpack type working machine), 16... Backpack band, 28... Recesses, 28a, 28b... Wall surface, 28c... Bottom surface, 30... Bar, 32... Gap, 44 ... band-shaped body (band-shaped end), 46... cylindrical part.

Claims (3)

A mounting structure for attaching a belt-shaped end portion (44) of a backpack-type working machine (10) to a backpack-type working machine (10), wherein a pair of left and right recesses (28) are formed on the front surface and the upper surface of the backpack-type working machine (10). The bar (30) is formed between the left and right wall surfaces (28a, 28b) of the recess (28), and the end portion (44) of the backpack band (16) is folded back to form a tubular portion (46). ) Is inserted into the gap (32) between the bar (30) and the bottom surface (28c) of the recess (28), and the pin (1) is inserted into the tubular portion (46) to insert the recess (28). ), the tubular portion (46) is prevented from coming off, and the backpack band mounting structure is such that the end portion (44) of the backpack band (16) is connected to the backpack type working machine (10).
The pin (1) has, at both ends thereof, the tubular portion (46) of the pin (1) inserted into the tubular portion (46) so as to project radially outward and face the tubular portion (46 ). ), each of which has a claw (2) for restricting its movement in the axial direction. The mounting structure for a backpack band according to claim 1, wherein the claw (2) has elasticity and is deformable so as to be able to enter the tubular portion (46) when being inserted into the tubular portion (46). .. The mounting structure for a backpack band according to claim 2, wherein the claw (2) is pressed and fixed to both the wall surfaces (28a, 28b) of the recess (28) by its elastic force.

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